pf.c revision 196372
1171168Smlaier/* $OpenBSD: pf.c,v 1.527 2007/02/22 15:23:23 pyr Exp $ */ 2181295Smlaier/* add: $OpenBSD: pf.c,v 1.559 2007/09/18 18:45:59 markus Exp $ */ 3126258Smlaier 4126258Smlaier/* 5126258Smlaier * Copyright (c) 2001 Daniel Hartmeier 6130613Smlaier * Copyright (c) 2002,2003 Henning Brauer 7126258Smlaier * All rights reserved. 8126258Smlaier * 9126258Smlaier * Redistribution and use in source and binary forms, with or without 10126258Smlaier * modification, are permitted provided that the following conditions 11126258Smlaier * are met: 12126258Smlaier * 13126258Smlaier * - Redistributions of source code must retain the above copyright 14126258Smlaier * notice, this list of conditions and the following disclaimer. 15126258Smlaier * - Redistributions in binary form must reproduce the above 16126258Smlaier * copyright notice, this list of conditions and the following 17126258Smlaier * disclaimer in the documentation and/or other materials provided 18126258Smlaier * with the distribution. 19126258Smlaier * 20126258Smlaier * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21126258Smlaier * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22126258Smlaier * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23126258Smlaier * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24126258Smlaier * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25126258Smlaier * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26126258Smlaier * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27126258Smlaier * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 28126258Smlaier * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29126258Smlaier * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 30126258Smlaier * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31126258Smlaier * POSSIBILITY OF SUCH DAMAGE. 32126258Smlaier * 33126258Smlaier * Effort sponsored in part by the Defense Advanced Research Projects 34126258Smlaier * Agency (DARPA) and Air Force Research Laboratory, Air Force 35126258Smlaier * Materiel Command, USAF, under agreement number F30602-01-2-0537. 36126258Smlaier * 37126258Smlaier */ 38126258Smlaier 39127145Smlaier#ifdef __FreeBSD__ 40126261Smlaier#include "opt_inet.h" 41126261Smlaier#include "opt_inet6.h" 42171168Smlaier 43171168Smlaier#include <sys/cdefs.h> 44171168Smlaier__FBSDID("$FreeBSD: head/sys/contrib/pf/net/pf.c 196372 2009-08-19 00:10:10Z mlaier $"); 45126261Smlaier#endif 46126261Smlaier 47127145Smlaier#ifdef __FreeBSD__ 48126261Smlaier#include "opt_bpf.h" 49126261Smlaier#include "opt_pf.h" 50153110Sru 51153110Sru#ifdef DEV_BPF 52127145Smlaier#define NBPFILTER DEV_BPF 53153110Sru#else 54153110Sru#define NBPFILTER 0 55153110Sru#endif 56153110Sru 57153110Sru#ifdef DEV_PFLOG 58127145Smlaier#define NPFLOG DEV_PFLOG 59153110Sru#else 60153110Sru#define NPFLOG 0 61153110Sru#endif 62153110Sru 63153110Sru#ifdef DEV_PFSYNC 64127145Smlaier#define NPFSYNC DEV_PFSYNC 65126261Smlaier#else 66153110Sru#define NPFSYNC 0 67153110Sru#endif 68153110Sru 69153110Sru#else 70126258Smlaier#include "bpfilter.h" 71126258Smlaier#include "pflog.h" 72126258Smlaier#include "pfsync.h" 73126261Smlaier#endif 74126258Smlaier 75126258Smlaier#include <sys/param.h> 76126258Smlaier#include <sys/systm.h> 77126258Smlaier#include <sys/mbuf.h> 78126258Smlaier#include <sys/filio.h> 79126258Smlaier#include <sys/socket.h> 80126258Smlaier#include <sys/socketvar.h> 81126258Smlaier#include <sys/kernel.h> 82126258Smlaier#include <sys/time.h> 83127145Smlaier#ifdef __FreeBSD__ 84126261Smlaier#include <sys/sysctl.h> 85130613Smlaier#include <sys/endian.h> 86126261Smlaier#else 87126258Smlaier#include <sys/pool.h> 88126261Smlaier#endif 89171168Smlaier#include <sys/proc.h> 90171168Smlaier#ifdef __FreeBSD__ 91171168Smlaier#include <sys/kthread.h> 92171168Smlaier#include <sys/lock.h> 93171168Smlaier#include <sys/sx.h> 94171168Smlaier#else 95171168Smlaier#include <sys/rwlock.h> 96171168Smlaier#endif 97126258Smlaier 98126258Smlaier#include <net/if.h> 99126258Smlaier#include <net/if_types.h> 100126258Smlaier#include <net/bpf.h> 101126258Smlaier#include <net/route.h> 102171168Smlaier#ifndef __FreeBSD__ 103171168Smlaier#include <net/radix_mpath.h> 104171168Smlaier#endif 105126258Smlaier 106126258Smlaier#include <netinet/in.h> 107126258Smlaier#include <netinet/in_var.h> 108126258Smlaier#include <netinet/in_systm.h> 109126258Smlaier#include <netinet/ip.h> 110126258Smlaier#include <netinet/ip_var.h> 111126258Smlaier#include <netinet/tcp.h> 112126258Smlaier#include <netinet/tcp_seq.h> 113126258Smlaier#include <netinet/udp.h> 114126258Smlaier#include <netinet/ip_icmp.h> 115126258Smlaier#include <netinet/in_pcb.h> 116126258Smlaier#include <netinet/tcp_timer.h> 117126258Smlaier#include <netinet/tcp_var.h> 118126258Smlaier#include <netinet/udp_var.h> 119126258Smlaier#include <netinet/icmp_var.h> 120145836Smlaier#include <netinet/if_ether.h> 121126258Smlaier 122127145Smlaier#ifndef __FreeBSD__ 123126258Smlaier#include <dev/rndvar.h> 124126261Smlaier#endif 125126258Smlaier#include <net/pfvar.h> 126126258Smlaier#include <net/if_pflog.h> 127130613Smlaier 128130613Smlaier#if NPFSYNC > 0 129126258Smlaier#include <net/if_pfsync.h> 130130613Smlaier#endif /* NPFSYNC > 0 */ 131126258Smlaier 132126258Smlaier#ifdef INET6 133126258Smlaier#include <netinet/ip6.h> 134126258Smlaier#include <netinet/in_pcb.h> 135126258Smlaier#include <netinet/icmp6.h> 136126258Smlaier#include <netinet6/nd6.h> 137127145Smlaier#ifdef __FreeBSD__ 138126261Smlaier#include <netinet6/ip6_var.h> 139126261Smlaier#include <netinet6/in6_pcb.h> 140126261Smlaier#endif 141126258Smlaier#endif /* INET6 */ 142126258Smlaier 143127145Smlaier#ifdef __FreeBSD__ 144126261Smlaier#include <machine/in_cksum.h> 145126261Smlaier#include <sys/limits.h> 146126261Smlaier#include <sys/ucred.h> 147163606Srwatson#include <security/mac/mac_framework.h> 148126258Smlaier 149126261Smlaierextern int ip_optcopy(struct ip *, struct ip *); 150171168Smlaierextern int debug_pfugidhack; 151126261Smlaier#endif 152126261Smlaier 153126258Smlaier#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x 154126258Smlaier 155126258Smlaier/* 156126258Smlaier * Global variables 157126258Smlaier */ 158126258Smlaier 159126258Smlaierstruct pf_altqqueue pf_altqs[2]; 160126258Smlaierstruct pf_palist pf_pabuf; 161126258Smlaierstruct pf_altqqueue *pf_altqs_active; 162126258Smlaierstruct pf_altqqueue *pf_altqs_inactive; 163126258Smlaierstruct pf_status pf_status; 164126258Smlaier 165126258Smlaieru_int32_t ticket_altqs_active; 166126258Smlaieru_int32_t ticket_altqs_inactive; 167130613Smlaierint altqs_inactive_open; 168126258Smlaieru_int32_t ticket_pabuf; 169126258Smlaier 170145836Smlaierstruct pf_anchor_stackframe { 171145836Smlaier struct pf_ruleset *rs; 172145836Smlaier struct pf_rule *r; 173145836Smlaier struct pf_anchor_node *parent; 174145836Smlaier struct pf_anchor *child; 175145836Smlaier} pf_anchor_stack[64]; 176126261Smlaier 177127145Smlaier#ifdef __FreeBSD__ 178130613Smlaieruma_zone_t pf_src_tree_pl, pf_rule_pl; 179126261Smlaieruma_zone_t pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 180126261Smlaier#else 181130613Smlaierstruct pool pf_src_tree_pl, pf_rule_pl; 182126258Smlaierstruct pool pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 183126261Smlaier#endif 184126258Smlaier 185126258Smlaiervoid pf_print_host(struct pf_addr *, u_int16_t, u_int8_t); 186126258Smlaier 187145836Smlaiervoid pf_init_threshold(struct pf_threshold *, u_int32_t, 188145836Smlaier u_int32_t); 189145836Smlaiervoid pf_add_threshold(struct pf_threshold *); 190145836Smlaierint pf_check_threshold(struct pf_threshold *); 191145836Smlaier 192126258Smlaiervoid pf_change_ap(struct pf_addr *, u_int16_t *, 193126258Smlaier u_int16_t *, u_int16_t *, struct pf_addr *, 194126258Smlaier u_int16_t, u_int8_t, sa_family_t); 195171168Smlaierint pf_modulate_sack(struct mbuf *, int, struct pf_pdesc *, 196171168Smlaier struct tcphdr *, struct pf_state_peer *); 197126258Smlaier#ifdef INET6 198126258Smlaiervoid pf_change_a6(struct pf_addr *, u_int16_t *, 199126258Smlaier struct pf_addr *, u_int8_t); 200126258Smlaier#endif /* INET6 */ 201126258Smlaiervoid pf_change_icmp(struct pf_addr *, u_int16_t *, 202126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 203126258Smlaier u_int16_t *, u_int16_t *, u_int16_t *, 204126258Smlaier u_int16_t *, u_int8_t, sa_family_t); 205162238Scsjp#ifdef __FreeBSD__ 206162238Scsjpvoid pf_send_tcp(struct mbuf *, 207162238Scsjp const struct pf_rule *, sa_family_t, 208162238Scsjp#else 209126258Smlaiervoid pf_send_tcp(const struct pf_rule *, sa_family_t, 210162238Scsjp#endif 211126258Smlaier const struct pf_addr *, const struct pf_addr *, 212126258Smlaier u_int16_t, u_int16_t, u_int32_t, u_int32_t, 213145836Smlaier u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 214171168Smlaier u_int16_t, struct ether_header *, struct ifnet *); 215126258Smlaiervoid pf_send_icmp(struct mbuf *, u_int8_t, u_int8_t, 216126258Smlaier sa_family_t, struct pf_rule *); 217126258Smlaierstruct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *, 218130613Smlaier int, int, struct pfi_kif *, 219126258Smlaier struct pf_addr *, u_int16_t, struct pf_addr *, 220126258Smlaier u_int16_t, int); 221126258Smlaierstruct pf_rule *pf_get_translation(struct pf_pdesc *, struct mbuf *, 222130613Smlaier int, int, struct pfi_kif *, struct pf_src_node **, 223126258Smlaier struct pf_addr *, u_int16_t, 224126258Smlaier struct pf_addr *, u_int16_t, 225126258Smlaier struct pf_addr *, u_int16_t *); 226126258Smlaierint pf_test_tcp(struct pf_rule **, struct pf_state **, 227130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 228126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 229135920Smlaier#ifdef __FreeBSD__ 230145836Smlaier struct pf_ruleset **, struct ifqueue *, 231145836Smlaier struct inpcb *); 232135920Smlaier#else 233145836Smlaier struct pf_ruleset **, struct ifqueue *); 234135920Smlaier#endif 235126258Smlaierint pf_test_udp(struct pf_rule **, struct pf_state **, 236130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 237126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 238135920Smlaier#ifdef __FreeBSD__ 239145836Smlaier struct pf_ruleset **, struct ifqueue *, 240145836Smlaier struct inpcb *); 241135920Smlaier#else 242145836Smlaier struct pf_ruleset **, struct ifqueue *); 243135920Smlaier#endif 244126258Smlaierint pf_test_icmp(struct pf_rule **, struct pf_state **, 245130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 246126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 247145836Smlaier struct pf_ruleset **, struct ifqueue *); 248126258Smlaierint pf_test_other(struct pf_rule **, struct pf_state **, 249130613Smlaier int, struct pfi_kif *, struct mbuf *, int, void *, 250126258Smlaier struct pf_pdesc *, struct pf_rule **, 251145836Smlaier struct pf_ruleset **, struct ifqueue *); 252126258Smlaierint pf_test_fragment(struct pf_rule **, int, 253130613Smlaier struct pfi_kif *, struct mbuf *, void *, 254126258Smlaier struct pf_pdesc *, struct pf_rule **, 255126258Smlaier struct pf_ruleset **); 256126258Smlaierint pf_test_state_tcp(struct pf_state **, int, 257130613Smlaier struct pfi_kif *, struct mbuf *, int, 258126258Smlaier void *, struct pf_pdesc *, u_short *); 259126258Smlaierint pf_test_state_udp(struct pf_state **, int, 260130613Smlaier struct pfi_kif *, struct mbuf *, int, 261126258Smlaier void *, struct pf_pdesc *); 262126258Smlaierint pf_test_state_icmp(struct pf_state **, int, 263130613Smlaier struct pfi_kif *, struct mbuf *, int, 264145836Smlaier void *, struct pf_pdesc *, u_short *); 265126258Smlaierint pf_test_state_other(struct pf_state **, int, 266130613Smlaier struct pfi_kif *, struct pf_pdesc *); 267126258Smlaierint pf_match_tag(struct mbuf *, struct pf_rule *, 268171168Smlaier struct pf_mtag *, int *); 269171168Smlaierint pf_step_out_of_anchor(int *, struct pf_ruleset **, 270171168Smlaier int, struct pf_rule **, struct pf_rule **, 271171168Smlaier int *); 272126258Smlaiervoid pf_hash(struct pf_addr *, struct pf_addr *, 273126258Smlaier struct pf_poolhashkey *, sa_family_t); 274130613Smlaierint pf_map_addr(u_int8_t, struct pf_rule *, 275126258Smlaier struct pf_addr *, struct pf_addr *, 276130613Smlaier struct pf_addr *, struct pf_src_node **); 277130613Smlaierint pf_get_sport(sa_family_t, u_int8_t, struct pf_rule *, 278126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 279130613Smlaier struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t, 280130613Smlaier struct pf_src_node **); 281126258Smlaiervoid pf_route(struct mbuf **, struct pf_rule *, int, 282171168Smlaier struct ifnet *, struct pf_state *, 283171168Smlaier struct pf_pdesc *); 284126258Smlaiervoid pf_route6(struct mbuf **, struct pf_rule *, int, 285171168Smlaier struct ifnet *, struct pf_state *, 286171168Smlaier struct pf_pdesc *); 287135920Smlaier#ifdef __FreeBSD__ 288171168Smlaier/* XXX: import */ 289135920Smlaier#else 290171168Smlaierint pf_socket_lookup(int, struct pf_pdesc *); 291135920Smlaier#endif 292126258Smlaieru_int8_t pf_get_wscale(struct mbuf *, int, u_int16_t, 293126258Smlaier sa_family_t); 294126258Smlaieru_int16_t pf_get_mss(struct mbuf *, int, u_int16_t, 295126258Smlaier sa_family_t); 296126258Smlaieru_int16_t pf_calc_mss(struct pf_addr *, sa_family_t, 297126258Smlaier u_int16_t); 298126258Smlaiervoid pf_set_rt_ifp(struct pf_state *, 299126258Smlaier struct pf_addr *); 300126258Smlaierint pf_check_proto_cksum(struct mbuf *, int, int, 301126258Smlaier u_int8_t, sa_family_t); 302126258Smlaierint pf_addr_wrap_neq(struct pf_addr_wrap *, 303126258Smlaier struct pf_addr_wrap *); 304130613Smlaierstruct pf_state *pf_find_state_recurse(struct pfi_kif *, 305171168Smlaier struct pf_state_cmp *, u_int8_t); 306145836Smlaierint pf_src_connlimit(struct pf_state **); 307145836Smlaierint pf_check_congestion(struct ifqueue *); 308126258Smlaier 309127145Smlaier#ifdef __FreeBSD__ 310126261Smlaierint in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len); 311126258Smlaier 312171168Smlaierextern int pf_end_threads; 313171168Smlaier 314126261Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 315171168Smlaier#else 316171168Smlaierextern struct pool pfr_ktable_pl; 317171168Smlaierextern struct pool pfr_kentry_pl; 318145836Smlaier 319130613Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX] = { 320130613Smlaier { &pf_state_pl, PFSTATE_HIWAT }, 321130613Smlaier { &pf_src_tree_pl, PFSNODE_HIWAT }, 322171168Smlaier { &pf_frent_pl, PFFRAG_FRENT_HIWAT }, 323171168Smlaier { &pfr_ktable_pl, PFR_KTABLE_HIWAT }, 324171168Smlaier { &pfr_kentry_pl, PFR_KENTRY_HIWAT } 325130613Smlaier}; 326126261Smlaier#endif 327126258Smlaier 328126258Smlaier#define STATE_LOOKUP() \ 329126258Smlaier do { \ 330126258Smlaier if (direction == PF_IN) \ 331145836Smlaier *state = pf_find_state_recurse( \ 332130613Smlaier kif, &key, PF_EXT_GWY); \ 333126258Smlaier else \ 334145836Smlaier *state = pf_find_state_recurse( \ 335130613Smlaier kif, &key, PF_LAN_EXT); \ 336145836Smlaier if (*state == NULL || (*state)->timeout == PFTM_PURGE) \ 337126258Smlaier return (PF_DROP); \ 338126258Smlaier if (direction == PF_OUT && \ 339126258Smlaier (((*state)->rule.ptr->rt == PF_ROUTETO && \ 340126258Smlaier (*state)->rule.ptr->direction == PF_OUT) || \ 341126258Smlaier ((*state)->rule.ptr->rt == PF_REPLYTO && \ 342126258Smlaier (*state)->rule.ptr->direction == PF_IN)) && \ 343130613Smlaier (*state)->rt_kif != NULL && \ 344130613Smlaier (*state)->rt_kif != kif) \ 345126258Smlaier return (PF_PASS); \ 346126258Smlaier } while (0) 347126258Smlaier 348126258Smlaier#define STATE_TRANSLATE(s) \ 349126258Smlaier (s)->lan.addr.addr32[0] != (s)->gwy.addr.addr32[0] || \ 350126258Smlaier ((s)->af == AF_INET6 && \ 351126258Smlaier ((s)->lan.addr.addr32[1] != (s)->gwy.addr.addr32[1] || \ 352126258Smlaier (s)->lan.addr.addr32[2] != (s)->gwy.addr.addr32[2] || \ 353126258Smlaier (s)->lan.addr.addr32[3] != (s)->gwy.addr.addr32[3])) || \ 354126258Smlaier (s)->lan.port != (s)->gwy.port 355126258Smlaier 356171168Smlaier#define BOUND_IFACE(r, k) \ 357171168Smlaier ((r)->rule_flag & PFRULE_IFBOUND) ? (k) : pfi_all 358126258Smlaier 359145836Smlaier#define STATE_INC_COUNTERS(s) \ 360145836Smlaier do { \ 361145836Smlaier s->rule.ptr->states++; \ 362145836Smlaier if (s->anchor.ptr != NULL) \ 363145836Smlaier s->anchor.ptr->states++; \ 364145836Smlaier if (s->nat_rule.ptr != NULL) \ 365145836Smlaier s->nat_rule.ptr->states++; \ 366145836Smlaier } while (0) 367145836Smlaier 368145836Smlaier#define STATE_DEC_COUNTERS(s) \ 369145836Smlaier do { \ 370145836Smlaier if (s->nat_rule.ptr != NULL) \ 371145836Smlaier s->nat_rule.ptr->states--; \ 372145836Smlaier if (s->anchor.ptr != NULL) \ 373145836Smlaier s->anchor.ptr->states--; \ 374145836Smlaier s->rule.ptr->states--; \ 375145836Smlaier } while (0) 376145836Smlaier 377130613Smlaierstruct pf_src_tree tree_src_tracking; 378130613Smlaier 379130613Smlaierstruct pf_state_tree_id tree_id; 380171168Smlaierstruct pf_state_queue state_list; 381130613Smlaier 382171168Smlaier#ifdef __FreeBSD__ 383171168Smlaierstatic int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 384171168Smlaierstatic int pf_state_compare_lan_ext(struct pf_state *, struct pf_state *); 385171168Smlaierstatic int pf_state_compare_ext_gwy(struct pf_state *, struct pf_state *); 386171168Smlaierstatic int pf_state_compare_id(struct pf_state *, struct pf_state *); 387171168Smlaier#endif 388171168Smlaier 389130613SmlaierRB_GENERATE(pf_src_tree, pf_src_node, entry, pf_src_compare); 390130613SmlaierRB_GENERATE(pf_state_tree_lan_ext, pf_state, 391130613Smlaier u.s.entry_lan_ext, pf_state_compare_lan_ext); 392130613SmlaierRB_GENERATE(pf_state_tree_ext_gwy, pf_state, 393130613Smlaier u.s.entry_ext_gwy, pf_state_compare_ext_gwy); 394130613SmlaierRB_GENERATE(pf_state_tree_id, pf_state, 395130613Smlaier u.s.entry_id, pf_state_compare_id); 396130613Smlaier 397127145Smlaier#ifdef __FreeBSD__ 398126409Smlaierstatic int 399126409Smlaier#else 400126258Smlaierstatic __inline int 401126409Smlaier#endif 402130613Smlaierpf_src_compare(struct pf_src_node *a, struct pf_src_node *b) 403126258Smlaier{ 404126258Smlaier int diff; 405126258Smlaier 406130613Smlaier if (a->rule.ptr > b->rule.ptr) 407130613Smlaier return (1); 408130613Smlaier if (a->rule.ptr < b->rule.ptr) 409130613Smlaier return (-1); 410130613Smlaier if ((diff = a->af - b->af) != 0) 411130613Smlaier return (diff); 412130613Smlaier switch (a->af) { 413130613Smlaier#ifdef INET 414130613Smlaier case AF_INET: 415130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 416130613Smlaier return (1); 417130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 418130613Smlaier return (-1); 419130613Smlaier break; 420130613Smlaier#endif /* INET */ 421130613Smlaier#ifdef INET6 422130613Smlaier case AF_INET6: 423130613Smlaier if (a->addr.addr32[3] > b->addr.addr32[3]) 424130613Smlaier return (1); 425130613Smlaier if (a->addr.addr32[3] < b->addr.addr32[3]) 426130613Smlaier return (-1); 427130613Smlaier if (a->addr.addr32[2] > b->addr.addr32[2]) 428130613Smlaier return (1); 429130613Smlaier if (a->addr.addr32[2] < b->addr.addr32[2]) 430130613Smlaier return (-1); 431130613Smlaier if (a->addr.addr32[1] > b->addr.addr32[1]) 432130613Smlaier return (1); 433130613Smlaier if (a->addr.addr32[1] < b->addr.addr32[1]) 434130613Smlaier return (-1); 435130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 436130613Smlaier return (1); 437130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 438130613Smlaier return (-1); 439130613Smlaier break; 440130613Smlaier#endif /* INET6 */ 441130613Smlaier } 442130613Smlaier return (0); 443130613Smlaier} 444130613Smlaier 445130613Smlaier#ifdef __FreeBSD__ 446130613Smlaierstatic int 447130613Smlaier#else 448130613Smlaierstatic __inline int 449130613Smlaier#endif 450130613Smlaierpf_state_compare_lan_ext(struct pf_state *a, struct pf_state *b) 451130613Smlaier{ 452130613Smlaier int diff; 453130613Smlaier 454126258Smlaier if ((diff = a->proto - b->proto) != 0) 455126258Smlaier return (diff); 456126258Smlaier if ((diff = a->af - b->af) != 0) 457126258Smlaier return (diff); 458126258Smlaier switch (a->af) { 459126258Smlaier#ifdef INET 460126258Smlaier case AF_INET: 461130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 462126258Smlaier return (1); 463130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 464126258Smlaier return (-1); 465130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 466126258Smlaier return (1); 467130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 468126258Smlaier return (-1); 469126258Smlaier break; 470126258Smlaier#endif /* INET */ 471126258Smlaier#ifdef INET6 472126258Smlaier case AF_INET6: 473130613Smlaier if (a->lan.addr.addr32[3] > b->lan.addr.addr32[3]) 474126258Smlaier return (1); 475130613Smlaier if (a->lan.addr.addr32[3] < b->lan.addr.addr32[3]) 476126258Smlaier return (-1); 477130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 478126258Smlaier return (1); 479130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 480126258Smlaier return (-1); 481130613Smlaier if (a->lan.addr.addr32[2] > b->lan.addr.addr32[2]) 482126258Smlaier return (1); 483130613Smlaier if (a->lan.addr.addr32[2] < b->lan.addr.addr32[2]) 484126258Smlaier return (-1); 485130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 486126258Smlaier return (1); 487130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 488126258Smlaier return (-1); 489130613Smlaier if (a->lan.addr.addr32[1] > b->lan.addr.addr32[1]) 490126258Smlaier return (1); 491130613Smlaier if (a->lan.addr.addr32[1] < b->lan.addr.addr32[1]) 492126258Smlaier return (-1); 493130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 494126258Smlaier return (1); 495130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 496126258Smlaier return (-1); 497130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 498126258Smlaier return (1); 499130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 500126258Smlaier return (-1); 501130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 502126258Smlaier return (1); 503130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 504126258Smlaier return (-1); 505126258Smlaier break; 506126258Smlaier#endif /* INET6 */ 507126258Smlaier } 508126258Smlaier 509130613Smlaier if ((diff = a->lan.port - b->lan.port) != 0) 510126258Smlaier return (diff); 511130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 512126258Smlaier return (diff); 513126258Smlaier 514126258Smlaier return (0); 515126258Smlaier} 516126258Smlaier 517130613Smlaier#ifdef __FreeBSD__ 518130613Smlaierstatic int 519130613Smlaier#else 520130613Smlaierstatic __inline int 521130613Smlaier#endif 522130613Smlaierpf_state_compare_ext_gwy(struct pf_state *a, struct pf_state *b) 523130613Smlaier{ 524130613Smlaier int diff; 525130613Smlaier 526130613Smlaier if ((diff = a->proto - b->proto) != 0) 527130613Smlaier return (diff); 528130613Smlaier if ((diff = a->af - b->af) != 0) 529130613Smlaier return (diff); 530130613Smlaier switch (a->af) { 531130613Smlaier#ifdef INET 532130613Smlaier case AF_INET: 533130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 534130613Smlaier return (1); 535130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 536130613Smlaier return (-1); 537130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 538130613Smlaier return (1); 539130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 540130613Smlaier return (-1); 541130613Smlaier break; 542130613Smlaier#endif /* INET */ 543126258Smlaier#ifdef INET6 544130613Smlaier case AF_INET6: 545130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 546130613Smlaier return (1); 547130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 548130613Smlaier return (-1); 549130613Smlaier if (a->gwy.addr.addr32[3] > b->gwy.addr.addr32[3]) 550130613Smlaier return (1); 551130613Smlaier if (a->gwy.addr.addr32[3] < b->gwy.addr.addr32[3]) 552130613Smlaier return (-1); 553130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 554130613Smlaier return (1); 555130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 556130613Smlaier return (-1); 557130613Smlaier if (a->gwy.addr.addr32[2] > b->gwy.addr.addr32[2]) 558130613Smlaier return (1); 559130613Smlaier if (a->gwy.addr.addr32[2] < b->gwy.addr.addr32[2]) 560130613Smlaier return (-1); 561130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 562130613Smlaier return (1); 563130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 564130613Smlaier return (-1); 565130613Smlaier if (a->gwy.addr.addr32[1] > b->gwy.addr.addr32[1]) 566130613Smlaier return (1); 567130613Smlaier if (a->gwy.addr.addr32[1] < b->gwy.addr.addr32[1]) 568130613Smlaier return (-1); 569130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 570130613Smlaier return (1); 571130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 572130613Smlaier return (-1); 573130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 574130613Smlaier return (1); 575130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 576130613Smlaier return (-1); 577130613Smlaier break; 578130613Smlaier#endif /* INET6 */ 579130613Smlaier } 580130613Smlaier 581130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 582130613Smlaier return (diff); 583130613Smlaier if ((diff = a->gwy.port - b->gwy.port) != 0) 584130613Smlaier return (diff); 585130613Smlaier 586130613Smlaier return (0); 587130613Smlaier} 588130613Smlaier 589130613Smlaier#ifdef __FreeBSD__ 590130613Smlaierstatic int 591130613Smlaier#else 592130613Smlaierstatic __inline int 593130613Smlaier#endif 594130613Smlaierpf_state_compare_id(struct pf_state *a, struct pf_state *b) 595130613Smlaier{ 596130613Smlaier if (a->id > b->id) 597130613Smlaier return (1); 598130613Smlaier if (a->id < b->id) 599130613Smlaier return (-1); 600130613Smlaier if (a->creatorid > b->creatorid) 601130613Smlaier return (1); 602130613Smlaier if (a->creatorid < b->creatorid) 603130613Smlaier return (-1); 604130613Smlaier 605130613Smlaier return (0); 606130613Smlaier} 607130613Smlaier 608130613Smlaier#ifdef INET6 609126258Smlaiervoid 610126258Smlaierpf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af) 611126258Smlaier{ 612126258Smlaier switch (af) { 613126258Smlaier#ifdef INET 614126258Smlaier case AF_INET: 615126258Smlaier dst->addr32[0] = src->addr32[0]; 616126258Smlaier break; 617126258Smlaier#endif /* INET */ 618126258Smlaier case AF_INET6: 619126258Smlaier dst->addr32[0] = src->addr32[0]; 620126258Smlaier dst->addr32[1] = src->addr32[1]; 621126258Smlaier dst->addr32[2] = src->addr32[2]; 622126258Smlaier dst->addr32[3] = src->addr32[3]; 623126258Smlaier break; 624126258Smlaier } 625126258Smlaier} 626145836Smlaier#endif /* INET6 */ 627126258Smlaier 628126258Smlaierstruct pf_state * 629171168Smlaierpf_find_state_byid(struct pf_state_cmp *key) 630126258Smlaier{ 631130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 632171168Smlaier return (RB_FIND(pf_state_tree_id, &tree_id, (struct pf_state *)key)); 633130613Smlaier} 634126258Smlaier 635130613Smlaierstruct pf_state * 636171168Smlaierpf_find_state_recurse(struct pfi_kif *kif, struct pf_state_cmp *key, u_int8_t tree) 637130613Smlaier{ 638130613Smlaier struct pf_state *s; 639130613Smlaier 640126258Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 641130613Smlaier 642130613Smlaier switch (tree) { 643130613Smlaier case PF_LAN_EXT: 644171168Smlaier if ((s = RB_FIND(pf_state_tree_lan_ext, &kif->pfik_lan_ext, 645171168Smlaier (struct pf_state *)key)) != NULL) 646171168Smlaier return (s); 647171168Smlaier if ((s = RB_FIND(pf_state_tree_lan_ext, &pfi_all->pfik_lan_ext, 648171168Smlaier (struct pf_state *)key)) != NULL) 649171168Smlaier return (s); 650126258Smlaier return (NULL); 651130613Smlaier case PF_EXT_GWY: 652171168Smlaier if ((s = RB_FIND(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, 653171168Smlaier (struct pf_state *)key)) != NULL) 654171168Smlaier return (s); 655171168Smlaier if ((s = RB_FIND(pf_state_tree_ext_gwy, &pfi_all->pfik_ext_gwy, 656171168Smlaier (struct pf_state *)key)) != NULL) 657171168Smlaier return (s); 658130613Smlaier return (NULL); 659130613Smlaier default: 660130613Smlaier panic("pf_find_state_recurse"); 661130613Smlaier } 662126258Smlaier} 663126258Smlaier 664130613Smlaierstruct pf_state * 665171168Smlaierpf_find_state_all(struct pf_state_cmp *key, u_int8_t tree, int *more) 666130613Smlaier{ 667130613Smlaier struct pf_state *s, *ss = NULL; 668130613Smlaier struct pfi_kif *kif; 669130613Smlaier 670130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 671130613Smlaier 672130613Smlaier switch (tree) { 673130613Smlaier case PF_LAN_EXT: 674130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 675130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 676171168Smlaier &kif->pfik_lan_ext, (struct pf_state *)key); 677130613Smlaier if (s == NULL) 678130613Smlaier continue; 679130613Smlaier if (more == NULL) 680130613Smlaier return (s); 681130613Smlaier ss = s; 682130613Smlaier (*more)++; 683130613Smlaier } 684130613Smlaier return (ss); 685130613Smlaier case PF_EXT_GWY: 686130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 687130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 688171168Smlaier &kif->pfik_ext_gwy, (struct pf_state *)key); 689130613Smlaier if (s == NULL) 690130613Smlaier continue; 691130613Smlaier if (more == NULL) 692130613Smlaier return (s); 693130613Smlaier ss = s; 694130613Smlaier (*more)++; 695130613Smlaier } 696130613Smlaier return (ss); 697130613Smlaier default: 698130613Smlaier panic("pf_find_state_all"); 699130613Smlaier } 700130613Smlaier} 701130613Smlaier 702145836Smlaiervoid 703145836Smlaierpf_init_threshold(struct pf_threshold *threshold, 704145836Smlaier u_int32_t limit, u_int32_t seconds) 705145836Smlaier{ 706145836Smlaier threshold->limit = limit * PF_THRESHOLD_MULT; 707145836Smlaier threshold->seconds = seconds; 708145836Smlaier threshold->count = 0; 709145836Smlaier threshold->last = time_second; 710145836Smlaier} 711145836Smlaier 712145836Smlaiervoid 713145836Smlaierpf_add_threshold(struct pf_threshold *threshold) 714145836Smlaier{ 715145836Smlaier u_int32_t t = time_second, diff = t - threshold->last; 716145836Smlaier 717145836Smlaier if (diff >= threshold->seconds) 718145836Smlaier threshold->count = 0; 719145836Smlaier else 720145836Smlaier threshold->count -= threshold->count * diff / 721145836Smlaier threshold->seconds; 722145836Smlaier threshold->count += PF_THRESHOLD_MULT; 723145836Smlaier threshold->last = t; 724145836Smlaier} 725145836Smlaier 726126258Smlaierint 727145836Smlaierpf_check_threshold(struct pf_threshold *threshold) 728145836Smlaier{ 729145836Smlaier return (threshold->count > threshold->limit); 730145836Smlaier} 731145836Smlaier 732145836Smlaierint 733145836Smlaierpf_src_connlimit(struct pf_state **state) 734145836Smlaier{ 735145836Smlaier struct pf_state *s; 736145836Smlaier int bad = 0; 737145836Smlaier 738145836Smlaier (*state)->src_node->conn++; 739171168Smlaier (*state)->src.tcp_est = 1; 740145836Smlaier pf_add_threshold(&(*state)->src_node->conn_rate); 741145836Smlaier 742145836Smlaier if ((*state)->rule.ptr->max_src_conn && 743145836Smlaier (*state)->rule.ptr->max_src_conn < 744145836Smlaier (*state)->src_node->conn) { 745145836Smlaier pf_status.lcounters[LCNT_SRCCONN]++; 746145836Smlaier bad++; 747145836Smlaier } 748145836Smlaier 749145836Smlaier if ((*state)->rule.ptr->max_src_conn_rate.limit && 750145836Smlaier pf_check_threshold(&(*state)->src_node->conn_rate)) { 751145836Smlaier pf_status.lcounters[LCNT_SRCCONNRATE]++; 752145836Smlaier bad++; 753145836Smlaier } 754145836Smlaier 755145836Smlaier if (!bad) 756145836Smlaier return (0); 757145836Smlaier 758145836Smlaier if ((*state)->rule.ptr->overload_tbl) { 759145836Smlaier struct pfr_addr p; 760145836Smlaier u_int32_t killed = 0; 761145836Smlaier 762145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_TABLE]++; 763145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 764145836Smlaier printf("pf_src_connlimit: blocking address "); 765145836Smlaier pf_print_host(&(*state)->src_node->addr, 0, 766145836Smlaier (*state)->af); 767145836Smlaier } 768145836Smlaier 769145836Smlaier bzero(&p, sizeof(p)); 770145836Smlaier p.pfra_af = (*state)->af; 771145836Smlaier switch ((*state)->af) { 772145836Smlaier#ifdef INET 773145836Smlaier case AF_INET: 774145836Smlaier p.pfra_net = 32; 775145836Smlaier p.pfra_ip4addr = (*state)->src_node->addr.v4; 776145836Smlaier break; 777145836Smlaier#endif /* INET */ 778145836Smlaier#ifdef INET6 779145836Smlaier case AF_INET6: 780145836Smlaier p.pfra_net = 128; 781145836Smlaier p.pfra_ip6addr = (*state)->src_node->addr.v6; 782145836Smlaier break; 783145836Smlaier#endif /* INET6 */ 784145836Smlaier } 785145836Smlaier 786145836Smlaier pfr_insert_kentry((*state)->rule.ptr->overload_tbl, 787145836Smlaier &p, time_second); 788145836Smlaier 789145836Smlaier /* kill existing states if that's required. */ 790145836Smlaier if ((*state)->rule.ptr->flush) { 791145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_FLUSH]++; 792145836Smlaier 793145836Smlaier RB_FOREACH(s, pf_state_tree_id, &tree_id) { 794145836Smlaier /* 795145836Smlaier * Kill states from this source. (Only those 796145836Smlaier * from the same rule if PF_FLUSH_GLOBAL is not 797145836Smlaier * set) 798145836Smlaier */ 799145836Smlaier if (s->af == (*state)->af && 800145836Smlaier (((*state)->direction == PF_OUT && 801145836Smlaier PF_AEQ(&(*state)->src_node->addr, 802145836Smlaier &s->lan.addr, s->af)) || 803145836Smlaier ((*state)->direction == PF_IN && 804145836Smlaier PF_AEQ(&(*state)->src_node->addr, 805145836Smlaier &s->ext.addr, s->af))) && 806145836Smlaier ((*state)->rule.ptr->flush & 807145836Smlaier PF_FLUSH_GLOBAL || 808145836Smlaier (*state)->rule.ptr == s->rule.ptr)) { 809145836Smlaier s->timeout = PFTM_PURGE; 810145836Smlaier s->src.state = s->dst.state = 811145836Smlaier TCPS_CLOSED; 812145836Smlaier killed++; 813145836Smlaier } 814145836Smlaier } 815145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 816145836Smlaier printf(", %u states killed", killed); 817145836Smlaier } 818145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 819145836Smlaier printf("\n"); 820145836Smlaier } 821145836Smlaier 822145836Smlaier /* kill this state */ 823145836Smlaier (*state)->timeout = PFTM_PURGE; 824145836Smlaier (*state)->src.state = (*state)->dst.state = TCPS_CLOSED; 825145836Smlaier return (1); 826145836Smlaier} 827145836Smlaier 828145836Smlaierint 829130613Smlaierpf_insert_src_node(struct pf_src_node **sn, struct pf_rule *rule, 830130613Smlaier struct pf_addr *src, sa_family_t af) 831126258Smlaier{ 832130613Smlaier struct pf_src_node k; 833126258Smlaier 834130613Smlaier if (*sn == NULL) { 835130613Smlaier k.af = af; 836130613Smlaier PF_ACPY(&k.addr, src, af); 837130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 838130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 839130613Smlaier k.rule.ptr = rule; 840130613Smlaier else 841130613Smlaier k.rule.ptr = NULL; 842130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 843130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 844130613Smlaier } 845130613Smlaier if (*sn == NULL) { 846130613Smlaier if (!rule->max_src_nodes || 847130613Smlaier rule->src_nodes < rule->max_src_nodes) 848130613Smlaier (*sn) = pool_get(&pf_src_tree_pl, PR_NOWAIT); 849145836Smlaier else 850145836Smlaier pf_status.lcounters[LCNT_SRCNODES]++; 851130613Smlaier if ((*sn) == NULL) 852130613Smlaier return (-1); 853130613Smlaier bzero(*sn, sizeof(struct pf_src_node)); 854145836Smlaier 855145836Smlaier pf_init_threshold(&(*sn)->conn_rate, 856145836Smlaier rule->max_src_conn_rate.limit, 857145836Smlaier rule->max_src_conn_rate.seconds); 858145836Smlaier 859130613Smlaier (*sn)->af = af; 860130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 861130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 862130613Smlaier (*sn)->rule.ptr = rule; 863130613Smlaier else 864130613Smlaier (*sn)->rule.ptr = NULL; 865130613Smlaier PF_ACPY(&(*sn)->addr, src, af); 866130613Smlaier if (RB_INSERT(pf_src_tree, 867130613Smlaier &tree_src_tracking, *sn) != NULL) { 868130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 869130613Smlaier printf("pf: src_tree insert failed: "); 870130613Smlaier pf_print_host(&(*sn)->addr, 0, af); 871130613Smlaier printf("\n"); 872130613Smlaier } 873130613Smlaier pool_put(&pf_src_tree_pl, *sn); 874130613Smlaier return (-1); 875130613Smlaier } 876130613Smlaier (*sn)->creation = time_second; 877130613Smlaier (*sn)->ruletype = rule->action; 878130613Smlaier if ((*sn)->rule.ptr != NULL) 879130613Smlaier (*sn)->rule.ptr->src_nodes++; 880130613Smlaier pf_status.scounters[SCNT_SRC_NODE_INSERT]++; 881130613Smlaier pf_status.src_nodes++; 882130613Smlaier } else { 883130613Smlaier if (rule->max_src_states && 884145836Smlaier (*sn)->states >= rule->max_src_states) { 885145836Smlaier pf_status.lcounters[LCNT_SRCSTATES]++; 886130613Smlaier return (-1); 887145836Smlaier } 888130613Smlaier } 889130613Smlaier return (0); 890130613Smlaier} 891126258Smlaier 892130613Smlaierint 893130613Smlaierpf_insert_state(struct pfi_kif *kif, struct pf_state *state) 894130613Smlaier{ 895126258Smlaier /* Thou MUST NOT insert multiple duplicate keys */ 896130613Smlaier state->u.s.kif = kif; 897130613Smlaier if (RB_INSERT(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state)) { 898126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 899126258Smlaier printf("pf: state insert failed: tree_lan_ext"); 900126258Smlaier printf(" lan: "); 901126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 902126258Smlaier state->af); 903126258Smlaier printf(" gwy: "); 904126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 905126258Smlaier state->af); 906126258Smlaier printf(" ext: "); 907126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 908126258Smlaier state->af); 909130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 910130613Smlaier printf(" (from sync)"); 911126258Smlaier printf("\n"); 912126258Smlaier } 913126258Smlaier return (-1); 914126258Smlaier } 915126258Smlaier 916130613Smlaier if (RB_INSERT(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state)) { 917126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 918126258Smlaier printf("pf: state insert failed: tree_ext_gwy"); 919126258Smlaier printf(" lan: "); 920126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 921126258Smlaier state->af); 922126258Smlaier printf(" gwy: "); 923126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 924126258Smlaier state->af); 925126258Smlaier printf(" ext: "); 926126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 927126258Smlaier state->af); 928130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 929130613Smlaier printf(" (from sync)"); 930126258Smlaier printf("\n"); 931126258Smlaier } 932130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 933126258Smlaier return (-1); 934126258Smlaier } 935126258Smlaier 936130613Smlaier if (state->id == 0 && state->creatorid == 0) { 937130613Smlaier state->id = htobe64(pf_status.stateid++); 938130613Smlaier state->creatorid = pf_status.hostid; 939130613Smlaier } 940130613Smlaier if (RB_INSERT(pf_state_tree_id, &tree_id, state) != NULL) { 941130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 942130613Smlaier#ifdef __FreeBSD__ 943130613Smlaier printf("pf: state insert failed: " 944130613Smlaier "id: %016llx creatorid: %08x", 945130613Smlaier (long long)be64toh(state->id), 946130613Smlaier ntohl(state->creatorid)); 947130613Smlaier#else 948130613Smlaier printf("pf: state insert failed: " 949130613Smlaier "id: %016llx creatorid: %08x", 950130613Smlaier betoh64(state->id), ntohl(state->creatorid)); 951130613Smlaier#endif 952130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 953130613Smlaier printf(" (from sync)"); 954130613Smlaier printf("\n"); 955130613Smlaier } 956130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 957130613Smlaier RB_REMOVE(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state); 958130613Smlaier return (-1); 959130613Smlaier } 960171168Smlaier TAILQ_INSERT_TAIL(&state_list, state, u.s.entry_list); 961126258Smlaier pf_status.fcounters[FCNT_STATE_INSERT]++; 962126258Smlaier pf_status.states++; 963171168Smlaier pfi_kif_ref(kif, PFI_KIF_REF_STATE); 964126258Smlaier#if NPFSYNC 965126258Smlaier pfsync_insert_state(state); 966126258Smlaier#endif 967126258Smlaier return (0); 968126258Smlaier} 969126258Smlaier 970126258Smlaiervoid 971171168Smlaierpf_purge_thread(void *v) 972126258Smlaier{ 973171168Smlaier int nloops = 0, s; 974196372Smlaier#ifdef __FreeBSD__ 975196372Smlaier int locked; 976196372Smlaier#endif 977171168Smlaier 978171168Smlaier for (;;) { 979171168Smlaier tsleep(pf_purge_thread, PWAIT, "pftm", 1 * hz); 980171168Smlaier 981127145Smlaier#ifdef __FreeBSD__ 982171168Smlaier sx_slock(&pf_consistency_lock); 983171168Smlaier PF_LOCK(); 984196372Smlaier locked = 0; 985126258Smlaier 986171168Smlaier if (pf_end_threads) { 987196372Smlaier PF_UNLOCK(); 988196372Smlaier sx_sunlock(&pf_consistency_lock); 989196372Smlaier sx_xlock(&pf_consistency_lock); 990196372Smlaier PF_LOCK(); 991196372Smlaier pf_purge_expired_states(pf_status.states, 1); 992171168Smlaier pf_purge_expired_fragments(); 993196372Smlaier pf_purge_expired_src_nodes(1); 994171168Smlaier pf_end_threads++; 995171168Smlaier 996196372Smlaier sx_xunlock(&pf_consistency_lock); 997171168Smlaier PF_UNLOCK(); 998171168Smlaier wakeup(pf_purge_thread); 999172836Sjulian kproc_exit(0); 1000171168Smlaier } 1001126261Smlaier#endif 1002171168Smlaier s = splsoftnet(); 1003126258Smlaier 1004171168Smlaier /* process a fraction of the state table every second */ 1005196372Smlaier#ifdef __FreeBSD__ 1006196372Smlaier if(!pf_purge_expired_states(1 + (pf_status.states 1007196372Smlaier / pf_default_rule.timeout[PFTM_INTERVAL]), 0)) { 1008196372Smlaier PF_UNLOCK(); 1009196372Smlaier sx_sunlock(&pf_consistency_lock); 1010196372Smlaier sx_xlock(&pf_consistency_lock); 1011196372Smlaier PF_LOCK(); 1012196372Smlaier locked = 1; 1013196372Smlaier 1014196372Smlaier pf_purge_expired_states(1 + (pf_status.states 1015196372Smlaier / pf_default_rule.timeout[PFTM_INTERVAL]), 1); 1016196372Smlaier } 1017196372Smlaier#else 1018171168Smlaier pf_purge_expired_states(1 + (pf_status.states 1019171168Smlaier / pf_default_rule.timeout[PFTM_INTERVAL])); 1020196372Smlaier#endif 1021171168Smlaier 1022171168Smlaier /* purge other expired types every PFTM_INTERVAL seconds */ 1023171168Smlaier if (++nloops >= pf_default_rule.timeout[PFTM_INTERVAL]) { 1024171168Smlaier pf_purge_expired_fragments(); 1025196372Smlaier if (!pf_purge_expired_src_nodes(locked)) { 1026196372Smlaier PF_UNLOCK(); 1027196372Smlaier sx_sunlock(&pf_consistency_lock); 1028196372Smlaier sx_xlock(&pf_consistency_lock); 1029196372Smlaier PF_LOCK(); 1030196372Smlaier locked = 1; 1031196372Smlaier pf_purge_expired_src_nodes(1); 1032196372Smlaier } 1033171168Smlaier nloops = 0; 1034171168Smlaier } 1035171168Smlaier 1036171168Smlaier splx(s); 1037127145Smlaier#ifdef __FreeBSD__ 1038171168Smlaier PF_UNLOCK(); 1039196372Smlaier if (locked) 1040196372Smlaier sx_xunlock(&pf_consistency_lock); 1041196372Smlaier else 1042196372Smlaier sx_sunlock(&pf_consistency_lock); 1043126261Smlaier#endif 1044171168Smlaier } 1045126258Smlaier} 1046126258Smlaier 1047126258Smlaieru_int32_t 1048126258Smlaierpf_state_expires(const struct pf_state *state) 1049126258Smlaier{ 1050126258Smlaier u_int32_t timeout; 1051126258Smlaier u_int32_t start; 1052126258Smlaier u_int32_t end; 1053126258Smlaier u_int32_t states; 1054126258Smlaier 1055126258Smlaier /* handle all PFTM_* > PFTM_MAX here */ 1056126258Smlaier if (state->timeout == PFTM_PURGE) 1057126261Smlaier return (time_second); 1058126258Smlaier if (state->timeout == PFTM_UNTIL_PACKET) 1059126258Smlaier return (0); 1060127145Smlaier#ifdef __FreeBSD__ 1061171168Smlaier KASSERT(state->timeout != PFTM_UNLINKED, 1062171168Smlaier ("pf_state_expires: timeout == PFTM_UNLINKED")); 1063126261Smlaier KASSERT((state->timeout < PFTM_MAX), 1064126261Smlaier ("pf_state_expires: timeout > PFTM_MAX")); 1065126261Smlaier#else 1066171168Smlaier KASSERT(state->timeout != PFTM_UNLINKED); 1067126258Smlaier KASSERT(state->timeout < PFTM_MAX); 1068126261Smlaier#endif 1069126258Smlaier timeout = state->rule.ptr->timeout[state->timeout]; 1070126258Smlaier if (!timeout) 1071126258Smlaier timeout = pf_default_rule.timeout[state->timeout]; 1072126258Smlaier start = state->rule.ptr->timeout[PFTM_ADAPTIVE_START]; 1073126258Smlaier if (start) { 1074126258Smlaier end = state->rule.ptr->timeout[PFTM_ADAPTIVE_END]; 1075126258Smlaier states = state->rule.ptr->states; 1076126258Smlaier } else { 1077126258Smlaier start = pf_default_rule.timeout[PFTM_ADAPTIVE_START]; 1078126258Smlaier end = pf_default_rule.timeout[PFTM_ADAPTIVE_END]; 1079126258Smlaier states = pf_status.states; 1080126258Smlaier } 1081126258Smlaier if (end && states > start && start < end) { 1082126258Smlaier if (states < end) 1083126258Smlaier return (state->expire + timeout * (end - states) / 1084126258Smlaier (end - start)); 1085126258Smlaier else 1086126261Smlaier return (time_second); 1087126258Smlaier } 1088126258Smlaier return (state->expire + timeout); 1089126258Smlaier} 1090126258Smlaier 1091196372Smlaier#ifdef __FreeBSD__ 1092196372Smlaierint 1093196372Smlaierpf_purge_expired_src_nodes(int waslocked) 1094196372Smlaier#else 1095126258Smlaiervoid 1096171168Smlaierpf_purge_expired_src_nodes(int waslocked) 1097196372Smlaier#endif 1098126258Smlaier{ 1099130613Smlaier struct pf_src_node *cur, *next; 1100171168Smlaier int locked = waslocked; 1101126258Smlaier 1102130613Smlaier for (cur = RB_MIN(pf_src_tree, &tree_src_tracking); cur; cur = next) { 1103130613Smlaier next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur); 1104126258Smlaier 1105130613Smlaier if (cur->states <= 0 && cur->expire <= time_second) { 1106171168Smlaier if (! locked) { 1107171168Smlaier#ifdef __FreeBSD__ 1108196372Smlaier if (!sx_try_upgrade(&pf_consistency_lock)) 1109196372Smlaier return (0); 1110171168Smlaier#else 1111171168Smlaier rw_enter_write(&pf_consistency_lock); 1112171168Smlaier#endif 1113171168Smlaier next = RB_NEXT(pf_src_tree, 1114171168Smlaier &tree_src_tracking, cur); 1115171168Smlaier locked = 1; 1116171168Smlaier } 1117130613Smlaier if (cur->rule.ptr != NULL) { 1118130613Smlaier cur->rule.ptr->src_nodes--; 1119130613Smlaier if (cur->rule.ptr->states <= 0 && 1120130613Smlaier cur->rule.ptr->max_src_nodes <= 0) 1121130613Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1122130613Smlaier } 1123130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, cur); 1124130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 1125130613Smlaier pf_status.src_nodes--; 1126130613Smlaier pool_put(&pf_src_tree_pl, cur); 1127130613Smlaier } 1128130613Smlaier } 1129171168Smlaier 1130171168Smlaier if (locked && !waslocked) 1131171168Smlaier#ifdef __FreeBSD__ 1132171168Smlaier sx_downgrade(&pf_consistency_lock); 1133171168Smlaier#else 1134171168Smlaier rw_exit_write(&pf_consistency_lock); 1135171168Smlaier#endif 1136196372Smlaier 1137196372Smlaier#ifdef __FreeBSD__ 1138196372Smlaier return (1); 1139196372Smlaier#endif 1140130613Smlaier} 1141126258Smlaier 1142130613Smlaiervoid 1143130613Smlaierpf_src_tree_remove_state(struct pf_state *s) 1144130613Smlaier{ 1145130613Smlaier u_int32_t timeout; 1146126258Smlaier 1147130613Smlaier if (s->src_node != NULL) { 1148145836Smlaier if (s->proto == IPPROTO_TCP) { 1149171168Smlaier if (s->src.tcp_est) 1150145836Smlaier --s->src_node->conn; 1151145836Smlaier } 1152130613Smlaier if (--s->src_node->states <= 0) { 1153130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1154130613Smlaier if (!timeout) 1155130613Smlaier timeout = 1156130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1157130613Smlaier s->src_node->expire = time_second + timeout; 1158130613Smlaier } 1159130613Smlaier } 1160130613Smlaier if (s->nat_src_node != s->src_node && s->nat_src_node != NULL) { 1161130613Smlaier if (--s->nat_src_node->states <= 0) { 1162130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1163130613Smlaier if (!timeout) 1164130613Smlaier timeout = 1165130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1166130613Smlaier s->nat_src_node->expire = time_second + timeout; 1167130613Smlaier } 1168130613Smlaier } 1169130613Smlaier s->src_node = s->nat_src_node = NULL; 1170130613Smlaier} 1171126258Smlaier 1172171168Smlaier/* callers should be at splsoftnet */ 1173130613Smlaiervoid 1174171168Smlaierpf_unlink_state(struct pf_state *cur) 1175145836Smlaier{ 1176148196Smlaier#ifdef __FreeBSD__ 1177153545Smlaier if (cur->local_flags & PFSTATE_EXPIRING) 1178148196Smlaier return; 1179153545Smlaier cur->local_flags |= PFSTATE_EXPIRING; 1180148196Smlaier#endif 1181171168Smlaier if (cur->src.state == PF_TCPS_PROXY_DST) { 1182162238Scsjp#ifdef __FreeBSD__ 1183162238Scsjp pf_send_tcp(NULL, cur->rule.ptr, cur->af, 1184162238Scsjp#else 1185145836Smlaier pf_send_tcp(cur->rule.ptr, cur->af, 1186162238Scsjp#endif 1187145836Smlaier &cur->ext.addr, &cur->lan.addr, 1188145836Smlaier cur->ext.port, cur->lan.port, 1189145836Smlaier cur->src.seqhi, cur->src.seqlo + 1, 1190171168Smlaier TH_RST|TH_ACK, 0, 0, 0, 1, cur->tag, NULL, NULL); 1191171168Smlaier } 1192145836Smlaier RB_REMOVE(pf_state_tree_ext_gwy, 1193145836Smlaier &cur->u.s.kif->pfik_ext_gwy, cur); 1194145836Smlaier RB_REMOVE(pf_state_tree_lan_ext, 1195145836Smlaier &cur->u.s.kif->pfik_lan_ext, cur); 1196145836Smlaier RB_REMOVE(pf_state_tree_id, &tree_id, cur); 1197145836Smlaier#if NPFSYNC 1198171168Smlaier if (cur->creatorid == pf_status.hostid) 1199171168Smlaier pfsync_delete_state(cur); 1200145836Smlaier#endif 1201171168Smlaier cur->timeout = PFTM_UNLINKED; 1202145836Smlaier pf_src_tree_remove_state(cur); 1203171168Smlaier} 1204171168Smlaier 1205171168Smlaier/* callers should be at splsoftnet and hold the 1206171168Smlaier * write_lock on pf_consistency_lock */ 1207171168Smlaiervoid 1208171168Smlaierpf_free_state(struct pf_state *cur) 1209171168Smlaier{ 1210171168Smlaier#if NPFSYNC 1211171168Smlaier if (pfsyncif != NULL && 1212171168Smlaier (pfsyncif->sc_bulk_send_next == cur || 1213171168Smlaier pfsyncif->sc_bulk_terminator == cur)) 1214171168Smlaier return; 1215171168Smlaier#endif 1216171168Smlaier#ifdef __FreeBSD__ 1217171168Smlaier KASSERT(cur->timeout == PFTM_UNLINKED, 1218171168Smlaier ("pf_free_state: cur->timeout != PFTM_UNLINKED")); 1219171168Smlaier#else 1220171168Smlaier KASSERT(cur->timeout == PFTM_UNLINKED); 1221171168Smlaier#endif 1222145836Smlaier if (--cur->rule.ptr->states <= 0 && 1223145836Smlaier cur->rule.ptr->src_nodes <= 0) 1224145836Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1225145836Smlaier if (cur->nat_rule.ptr != NULL) 1226145836Smlaier if (--cur->nat_rule.ptr->states <= 0 && 1227145836Smlaier cur->nat_rule.ptr->src_nodes <= 0) 1228145836Smlaier pf_rm_rule(NULL, cur->nat_rule.ptr); 1229145836Smlaier if (cur->anchor.ptr != NULL) 1230145836Smlaier if (--cur->anchor.ptr->states <= 0) 1231145836Smlaier pf_rm_rule(NULL, cur->anchor.ptr); 1232145836Smlaier pf_normalize_tcp_cleanup(cur); 1233171168Smlaier pfi_kif_unref(cur->u.s.kif, PFI_KIF_REF_STATE); 1234171168Smlaier TAILQ_REMOVE(&state_list, cur, u.s.entry_list); 1235145836Smlaier if (cur->tag) 1236145836Smlaier pf_tag_unref(cur->tag); 1237145836Smlaier pool_put(&pf_state_pl, cur); 1238145836Smlaier pf_status.fcounters[FCNT_STATE_REMOVALS]++; 1239145836Smlaier pf_status.states--; 1240145836Smlaier} 1241145836Smlaier 1242196372Smlaier#ifdef __FreeBSD__ 1243196372Smlaierint 1244196372Smlaierpf_purge_expired_states(u_int32_t maxcheck, int waslocked) 1245196372Smlaier#else 1246145836Smlaiervoid 1247171168Smlaierpf_purge_expired_states(u_int32_t maxcheck) 1248196372Smlaier#endif 1249130613Smlaier{ 1250171168Smlaier static struct pf_state *cur = NULL; 1251171168Smlaier struct pf_state *next; 1252196372Smlaier#ifdef __FreeBSD__ 1253196372Smlaier int locked = waslocked; 1254196372Smlaier#else 1255171168Smlaier int locked = 0; 1256196372Smlaier#endif 1257130613Smlaier 1258171168Smlaier while (maxcheck--) { 1259171168Smlaier /* wrap to start of list when we hit the end */ 1260171168Smlaier if (cur == NULL) { 1261171168Smlaier cur = TAILQ_FIRST(&state_list); 1262171168Smlaier if (cur == NULL) 1263171168Smlaier break; /* list empty */ 1264171168Smlaier } 1265171168Smlaier 1266171168Smlaier /* get next state, as cur may get deleted */ 1267171168Smlaier next = TAILQ_NEXT(cur, u.s.entry_list); 1268171168Smlaier 1269171168Smlaier if (cur->timeout == PFTM_UNLINKED) { 1270171168Smlaier /* free unlinked state */ 1271171168Smlaier if (! locked) { 1272171168Smlaier#ifdef __FreeBSD__ 1273196372Smlaier if (!sx_try_upgrade(&pf_consistency_lock)) 1274196372Smlaier return (0); 1275171168Smlaier#else 1276171168Smlaier rw_enter_write(&pf_consistency_lock); 1277171168Smlaier#endif 1278171168Smlaier locked = 1; 1279171168Smlaier } 1280171168Smlaier pf_free_state(cur); 1281171168Smlaier } else if (pf_state_expires(cur) <= time_second) { 1282171168Smlaier /* unlink and free expired state */ 1283171168Smlaier pf_unlink_state(cur); 1284171168Smlaier if (! locked) { 1285171168Smlaier#ifdef __FreeBSD__ 1286196372Smlaier if (!sx_try_upgrade(&pf_consistency_lock)) 1287196372Smlaier return (0); 1288171168Smlaier#else 1289171168Smlaier rw_enter_write(&pf_consistency_lock); 1290171168Smlaier#endif 1291171168Smlaier locked = 1; 1292171168Smlaier } 1293171168Smlaier pf_free_state(cur); 1294171168Smlaier } 1295171168Smlaier cur = next; 1296126258Smlaier } 1297171168Smlaier 1298171168Smlaier#ifdef __FreeBSD__ 1299196372Smlaier if (!waslocked && locked) 1300171168Smlaier sx_downgrade(&pf_consistency_lock); 1301196372Smlaier 1302196372Smlaier return (1); 1303171168Smlaier#else 1304196372Smlaier if (locked) 1305171168Smlaier rw_exit_write(&pf_consistency_lock); 1306171168Smlaier#endif 1307126258Smlaier} 1308126258Smlaier 1309126258Smlaierint 1310126258Smlaierpf_tbladdr_setup(struct pf_ruleset *rs, struct pf_addr_wrap *aw) 1311126258Smlaier{ 1312126258Smlaier if (aw->type != PF_ADDR_TABLE) 1313126258Smlaier return (0); 1314126258Smlaier if ((aw->p.tbl = pfr_attach_table(rs, aw->v.tblname)) == NULL) 1315126258Smlaier return (1); 1316126258Smlaier return (0); 1317126258Smlaier} 1318126258Smlaier 1319126258Smlaiervoid 1320126258Smlaierpf_tbladdr_remove(struct pf_addr_wrap *aw) 1321126258Smlaier{ 1322126258Smlaier if (aw->type != PF_ADDR_TABLE || aw->p.tbl == NULL) 1323126258Smlaier return; 1324126258Smlaier pfr_detach_table(aw->p.tbl); 1325126258Smlaier aw->p.tbl = NULL; 1326126258Smlaier} 1327126258Smlaier 1328126258Smlaiervoid 1329126258Smlaierpf_tbladdr_copyout(struct pf_addr_wrap *aw) 1330126258Smlaier{ 1331126258Smlaier struct pfr_ktable *kt = aw->p.tbl; 1332126258Smlaier 1333126258Smlaier if (aw->type != PF_ADDR_TABLE || kt == NULL) 1334126258Smlaier return; 1335126258Smlaier if (!(kt->pfrkt_flags & PFR_TFLAG_ACTIVE) && kt->pfrkt_root != NULL) 1336126258Smlaier kt = kt->pfrkt_root; 1337126258Smlaier aw->p.tbl = NULL; 1338126258Smlaier aw->p.tblcnt = (kt->pfrkt_flags & PFR_TFLAG_ACTIVE) ? 1339126258Smlaier kt->pfrkt_cnt : -1; 1340126258Smlaier} 1341126258Smlaier 1342126258Smlaiervoid 1343126258Smlaierpf_print_host(struct pf_addr *addr, u_int16_t p, sa_family_t af) 1344126258Smlaier{ 1345126258Smlaier switch (af) { 1346126258Smlaier#ifdef INET 1347126258Smlaier case AF_INET: { 1348126258Smlaier u_int32_t a = ntohl(addr->addr32[0]); 1349126258Smlaier printf("%u.%u.%u.%u", (a>>24)&255, (a>>16)&255, 1350126258Smlaier (a>>8)&255, a&255); 1351126258Smlaier if (p) { 1352126258Smlaier p = ntohs(p); 1353126258Smlaier printf(":%u", p); 1354126258Smlaier } 1355126258Smlaier break; 1356126258Smlaier } 1357126258Smlaier#endif /* INET */ 1358126258Smlaier#ifdef INET6 1359126258Smlaier case AF_INET6: { 1360126258Smlaier u_int16_t b; 1361126258Smlaier u_int8_t i, curstart = 255, curend = 0, 1362126258Smlaier maxstart = 0, maxend = 0; 1363126258Smlaier for (i = 0; i < 8; i++) { 1364126258Smlaier if (!addr->addr16[i]) { 1365126258Smlaier if (curstart == 255) 1366126258Smlaier curstart = i; 1367126258Smlaier else 1368126258Smlaier curend = i; 1369126258Smlaier } else { 1370126258Smlaier if (curstart) { 1371126258Smlaier if ((curend - curstart) > 1372126258Smlaier (maxend - maxstart)) { 1373126258Smlaier maxstart = curstart; 1374126258Smlaier maxend = curend; 1375126258Smlaier curstart = 255; 1376126258Smlaier } 1377126258Smlaier } 1378126258Smlaier } 1379126258Smlaier } 1380126258Smlaier for (i = 0; i < 8; i++) { 1381126258Smlaier if (i >= maxstart && i <= maxend) { 1382126258Smlaier if (maxend != 7) { 1383126258Smlaier if (i == maxstart) 1384126258Smlaier printf(":"); 1385126258Smlaier } else { 1386126258Smlaier if (i == maxend) 1387126258Smlaier printf(":"); 1388126258Smlaier } 1389126258Smlaier } else { 1390126258Smlaier b = ntohs(addr->addr16[i]); 1391126258Smlaier printf("%x", b); 1392126258Smlaier if (i < 7) 1393126258Smlaier printf(":"); 1394126258Smlaier } 1395126258Smlaier } 1396126258Smlaier if (p) { 1397126258Smlaier p = ntohs(p); 1398126258Smlaier printf("[%u]", p); 1399126258Smlaier } 1400126258Smlaier break; 1401126258Smlaier } 1402126258Smlaier#endif /* INET6 */ 1403126258Smlaier } 1404126258Smlaier} 1405126258Smlaier 1406126258Smlaiervoid 1407126258Smlaierpf_print_state(struct pf_state *s) 1408126258Smlaier{ 1409126258Smlaier switch (s->proto) { 1410126258Smlaier case IPPROTO_TCP: 1411126258Smlaier printf("TCP "); 1412126258Smlaier break; 1413126258Smlaier case IPPROTO_UDP: 1414126258Smlaier printf("UDP "); 1415126258Smlaier break; 1416126258Smlaier case IPPROTO_ICMP: 1417126258Smlaier printf("ICMP "); 1418126258Smlaier break; 1419126258Smlaier case IPPROTO_ICMPV6: 1420126258Smlaier printf("ICMPV6 "); 1421126258Smlaier break; 1422126258Smlaier default: 1423126258Smlaier printf("%u ", s->proto); 1424126258Smlaier break; 1425126258Smlaier } 1426126258Smlaier pf_print_host(&s->lan.addr, s->lan.port, s->af); 1427126258Smlaier printf(" "); 1428126258Smlaier pf_print_host(&s->gwy.addr, s->gwy.port, s->af); 1429126258Smlaier printf(" "); 1430126258Smlaier pf_print_host(&s->ext.addr, s->ext.port, s->af); 1431126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->src.seqlo, 1432126258Smlaier s->src.seqhi, s->src.max_win, s->src.seqdiff); 1433126258Smlaier if (s->src.wscale && s->dst.wscale) 1434126258Smlaier printf(" wscale=%u", s->src.wscale & PF_WSCALE_MASK); 1435126258Smlaier printf("]"); 1436126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->dst.seqlo, 1437126258Smlaier s->dst.seqhi, s->dst.max_win, s->dst.seqdiff); 1438126258Smlaier if (s->src.wscale && s->dst.wscale) 1439126258Smlaier printf(" wscale=%u", s->dst.wscale & PF_WSCALE_MASK); 1440126258Smlaier printf("]"); 1441126258Smlaier printf(" %u:%u", s->src.state, s->dst.state); 1442126258Smlaier} 1443126258Smlaier 1444126258Smlaiervoid 1445126258Smlaierpf_print_flags(u_int8_t f) 1446126258Smlaier{ 1447126258Smlaier if (f) 1448126258Smlaier printf(" "); 1449126258Smlaier if (f & TH_FIN) 1450126258Smlaier printf("F"); 1451126258Smlaier if (f & TH_SYN) 1452126258Smlaier printf("S"); 1453126258Smlaier if (f & TH_RST) 1454126258Smlaier printf("R"); 1455126258Smlaier if (f & TH_PUSH) 1456126258Smlaier printf("P"); 1457126258Smlaier if (f & TH_ACK) 1458126258Smlaier printf("A"); 1459126258Smlaier if (f & TH_URG) 1460126258Smlaier printf("U"); 1461126258Smlaier if (f & TH_ECE) 1462126258Smlaier printf("E"); 1463126258Smlaier if (f & TH_CWR) 1464126258Smlaier printf("W"); 1465126258Smlaier} 1466126258Smlaier 1467126258Smlaier#define PF_SET_SKIP_STEPS(i) \ 1468126258Smlaier do { \ 1469126258Smlaier while (head[i] != cur) { \ 1470126258Smlaier head[i]->skip[i].ptr = cur; \ 1471126258Smlaier head[i] = TAILQ_NEXT(head[i], entries); \ 1472126258Smlaier } \ 1473126258Smlaier } while (0) 1474126258Smlaier 1475126258Smlaiervoid 1476126258Smlaierpf_calc_skip_steps(struct pf_rulequeue *rules) 1477126258Smlaier{ 1478126258Smlaier struct pf_rule *cur, *prev, *head[PF_SKIP_COUNT]; 1479126258Smlaier int i; 1480126258Smlaier 1481126258Smlaier cur = TAILQ_FIRST(rules); 1482126258Smlaier prev = cur; 1483126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1484126258Smlaier head[i] = cur; 1485126258Smlaier while (cur != NULL) { 1486126258Smlaier 1487130613Smlaier if (cur->kif != prev->kif || cur->ifnot != prev->ifnot) 1488126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_IFP); 1489126258Smlaier if (cur->direction != prev->direction) 1490126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DIR); 1491126258Smlaier if (cur->af != prev->af) 1492126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_AF); 1493126258Smlaier if (cur->proto != prev->proto) 1494126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_PROTO); 1495145836Smlaier if (cur->src.neg != prev->src.neg || 1496126258Smlaier pf_addr_wrap_neq(&cur->src.addr, &prev->src.addr)) 1497126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_ADDR); 1498126258Smlaier if (cur->src.port[0] != prev->src.port[0] || 1499126258Smlaier cur->src.port[1] != prev->src.port[1] || 1500126258Smlaier cur->src.port_op != prev->src.port_op) 1501126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_PORT); 1502145836Smlaier if (cur->dst.neg != prev->dst.neg || 1503126258Smlaier pf_addr_wrap_neq(&cur->dst.addr, &prev->dst.addr)) 1504126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_ADDR); 1505126258Smlaier if (cur->dst.port[0] != prev->dst.port[0] || 1506126258Smlaier cur->dst.port[1] != prev->dst.port[1] || 1507126258Smlaier cur->dst.port_op != prev->dst.port_op) 1508126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_PORT); 1509126258Smlaier 1510126258Smlaier prev = cur; 1511126258Smlaier cur = TAILQ_NEXT(cur, entries); 1512126258Smlaier } 1513126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1514126258Smlaier PF_SET_SKIP_STEPS(i); 1515126258Smlaier} 1516126258Smlaier 1517126258Smlaierint 1518126258Smlaierpf_addr_wrap_neq(struct pf_addr_wrap *aw1, struct pf_addr_wrap *aw2) 1519126258Smlaier{ 1520126258Smlaier if (aw1->type != aw2->type) 1521126258Smlaier return (1); 1522126258Smlaier switch (aw1->type) { 1523126258Smlaier case PF_ADDR_ADDRMASK: 1524126258Smlaier if (PF_ANEQ(&aw1->v.a.addr, &aw2->v.a.addr, 0)) 1525126258Smlaier return (1); 1526126258Smlaier if (PF_ANEQ(&aw1->v.a.mask, &aw2->v.a.mask, 0)) 1527126258Smlaier return (1); 1528126258Smlaier return (0); 1529126258Smlaier case PF_ADDR_DYNIFTL: 1530130613Smlaier return (aw1->p.dyn->pfid_kt != aw2->p.dyn->pfid_kt); 1531126258Smlaier case PF_ADDR_NOROUTE: 1532171168Smlaier case PF_ADDR_URPFFAILED: 1533126258Smlaier return (0); 1534126258Smlaier case PF_ADDR_TABLE: 1535126258Smlaier return (aw1->p.tbl != aw2->p.tbl); 1536171168Smlaier case PF_ADDR_RTLABEL: 1537171168Smlaier return (aw1->v.rtlabel != aw2->v.rtlabel); 1538126258Smlaier default: 1539126258Smlaier printf("invalid address type: %d\n", aw1->type); 1540126258Smlaier return (1); 1541126258Smlaier } 1542126258Smlaier} 1543126258Smlaier 1544126258Smlaieru_int16_t 1545126258Smlaierpf_cksum_fixup(u_int16_t cksum, u_int16_t old, u_int16_t new, u_int8_t udp) 1546126258Smlaier{ 1547126258Smlaier u_int32_t l; 1548126258Smlaier 1549126258Smlaier if (udp && !cksum) 1550126258Smlaier return (0x0000); 1551126258Smlaier l = cksum + old - new; 1552126258Smlaier l = (l >> 16) + (l & 65535); 1553126258Smlaier l = l & 65535; 1554126258Smlaier if (udp && !l) 1555126258Smlaier return (0xFFFF); 1556126258Smlaier return (l); 1557126258Smlaier} 1558126258Smlaier 1559126258Smlaiervoid 1560126258Smlaierpf_change_ap(struct pf_addr *a, u_int16_t *p, u_int16_t *ic, u_int16_t *pc, 1561126258Smlaier struct pf_addr *an, u_int16_t pn, u_int8_t u, sa_family_t af) 1562126258Smlaier{ 1563126258Smlaier struct pf_addr ao; 1564126258Smlaier u_int16_t po = *p; 1565126258Smlaier 1566126258Smlaier PF_ACPY(&ao, a, af); 1567126258Smlaier PF_ACPY(a, an, af); 1568126258Smlaier 1569126258Smlaier *p = pn; 1570126258Smlaier 1571126258Smlaier switch (af) { 1572126258Smlaier#ifdef INET 1573126258Smlaier case AF_INET: 1574126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1575126258Smlaier ao.addr16[0], an->addr16[0], 0), 1576126258Smlaier ao.addr16[1], an->addr16[1], 0); 1577126258Smlaier *p = pn; 1578126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1579126258Smlaier ao.addr16[0], an->addr16[0], u), 1580126258Smlaier ao.addr16[1], an->addr16[1], u), 1581126258Smlaier po, pn, u); 1582126258Smlaier break; 1583126258Smlaier#endif /* INET */ 1584126258Smlaier#ifdef INET6 1585126258Smlaier case AF_INET6: 1586126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1587126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1588126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1589126258Smlaier ao.addr16[0], an->addr16[0], u), 1590126258Smlaier ao.addr16[1], an->addr16[1], u), 1591126258Smlaier ao.addr16[2], an->addr16[2], u), 1592126258Smlaier ao.addr16[3], an->addr16[3], u), 1593126258Smlaier ao.addr16[4], an->addr16[4], u), 1594126258Smlaier ao.addr16[5], an->addr16[5], u), 1595126258Smlaier ao.addr16[6], an->addr16[6], u), 1596126258Smlaier ao.addr16[7], an->addr16[7], u), 1597126258Smlaier po, pn, u); 1598126258Smlaier break; 1599126258Smlaier#endif /* INET6 */ 1600126258Smlaier } 1601126258Smlaier} 1602126258Smlaier 1603126258Smlaier 1604126258Smlaier/* Changes a u_int32_t. Uses a void * so there are no align restrictions */ 1605126258Smlaiervoid 1606126258Smlaierpf_change_a(void *a, u_int16_t *c, u_int32_t an, u_int8_t u) 1607126258Smlaier{ 1608126258Smlaier u_int32_t ao; 1609126258Smlaier 1610126258Smlaier memcpy(&ao, a, sizeof(ao)); 1611126258Smlaier memcpy(a, &an, sizeof(u_int32_t)); 1612126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(*c, ao / 65536, an / 65536, u), 1613126258Smlaier ao % 65536, an % 65536, u); 1614126258Smlaier} 1615126258Smlaier 1616126258Smlaier#ifdef INET6 1617126258Smlaiervoid 1618126258Smlaierpf_change_a6(struct pf_addr *a, u_int16_t *c, struct pf_addr *an, u_int8_t u) 1619126258Smlaier{ 1620126258Smlaier struct pf_addr ao; 1621126258Smlaier 1622126258Smlaier PF_ACPY(&ao, a, AF_INET6); 1623126258Smlaier PF_ACPY(a, an, AF_INET6); 1624126258Smlaier 1625126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1626126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1627126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*c, 1628126258Smlaier ao.addr16[0], an->addr16[0], u), 1629126258Smlaier ao.addr16[1], an->addr16[1], u), 1630126258Smlaier ao.addr16[2], an->addr16[2], u), 1631126258Smlaier ao.addr16[3], an->addr16[3], u), 1632126258Smlaier ao.addr16[4], an->addr16[4], u), 1633126258Smlaier ao.addr16[5], an->addr16[5], u), 1634126258Smlaier ao.addr16[6], an->addr16[6], u), 1635126258Smlaier ao.addr16[7], an->addr16[7], u); 1636126258Smlaier} 1637126258Smlaier#endif /* INET6 */ 1638126258Smlaier 1639126258Smlaiervoid 1640126258Smlaierpf_change_icmp(struct pf_addr *ia, u_int16_t *ip, struct pf_addr *oa, 1641126258Smlaier struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c, 1642126258Smlaier u_int16_t *ic, u_int16_t *hc, u_int8_t u, sa_family_t af) 1643126258Smlaier{ 1644126258Smlaier struct pf_addr oia, ooa; 1645126258Smlaier 1646126258Smlaier PF_ACPY(&oia, ia, af); 1647126258Smlaier PF_ACPY(&ooa, oa, af); 1648126258Smlaier 1649126258Smlaier /* Change inner protocol port, fix inner protocol checksum. */ 1650126258Smlaier if (ip != NULL) { 1651126258Smlaier u_int16_t oip = *ip; 1652127629Smlaier u_int32_t opc = 0; /* make the compiler happy */ 1653126258Smlaier 1654126258Smlaier if (pc != NULL) 1655126258Smlaier opc = *pc; 1656126258Smlaier *ip = np; 1657126258Smlaier if (pc != NULL) 1658126258Smlaier *pc = pf_cksum_fixup(*pc, oip, *ip, u); 1659126258Smlaier *ic = pf_cksum_fixup(*ic, oip, *ip, 0); 1660126258Smlaier if (pc != NULL) 1661126258Smlaier *ic = pf_cksum_fixup(*ic, opc, *pc, 0); 1662126258Smlaier } 1663126258Smlaier /* Change inner ip address, fix inner ip and icmp checksums. */ 1664126258Smlaier PF_ACPY(ia, na, af); 1665126258Smlaier switch (af) { 1666126258Smlaier#ifdef INET 1667126258Smlaier case AF_INET: { 1668126258Smlaier u_int32_t oh2c = *h2c; 1669126258Smlaier 1670126258Smlaier *h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c, 1671126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1672126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1673126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1674126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1675126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1676126258Smlaier *ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0); 1677126258Smlaier break; 1678126258Smlaier } 1679126258Smlaier#endif /* INET */ 1680126258Smlaier#ifdef INET6 1681126258Smlaier case AF_INET6: 1682126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1683126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1684126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1685126258Smlaier oia.addr16[0], ia->addr16[0], u), 1686126258Smlaier oia.addr16[1], ia->addr16[1], u), 1687126258Smlaier oia.addr16[2], ia->addr16[2], u), 1688126258Smlaier oia.addr16[3], ia->addr16[3], u), 1689126258Smlaier oia.addr16[4], ia->addr16[4], u), 1690126258Smlaier oia.addr16[5], ia->addr16[5], u), 1691126258Smlaier oia.addr16[6], ia->addr16[6], u), 1692126258Smlaier oia.addr16[7], ia->addr16[7], u); 1693126258Smlaier break; 1694126258Smlaier#endif /* INET6 */ 1695126258Smlaier } 1696126258Smlaier /* Change outer ip address, fix outer ip or icmpv6 checksum. */ 1697126258Smlaier PF_ACPY(oa, na, af); 1698126258Smlaier switch (af) { 1699126258Smlaier#ifdef INET 1700126258Smlaier case AF_INET: 1701126258Smlaier *hc = pf_cksum_fixup(pf_cksum_fixup(*hc, 1702126258Smlaier ooa.addr16[0], oa->addr16[0], 0), 1703126258Smlaier ooa.addr16[1], oa->addr16[1], 0); 1704126258Smlaier break; 1705126258Smlaier#endif /* INET */ 1706126258Smlaier#ifdef INET6 1707126258Smlaier case AF_INET6: 1708126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1709126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1710126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1711126258Smlaier ooa.addr16[0], oa->addr16[0], u), 1712126258Smlaier ooa.addr16[1], oa->addr16[1], u), 1713126258Smlaier ooa.addr16[2], oa->addr16[2], u), 1714126258Smlaier ooa.addr16[3], oa->addr16[3], u), 1715126258Smlaier ooa.addr16[4], oa->addr16[4], u), 1716126258Smlaier ooa.addr16[5], oa->addr16[5], u), 1717126258Smlaier ooa.addr16[6], oa->addr16[6], u), 1718126258Smlaier ooa.addr16[7], oa->addr16[7], u); 1719126258Smlaier break; 1720126258Smlaier#endif /* INET6 */ 1721126258Smlaier } 1722126258Smlaier} 1723126258Smlaier 1724171168Smlaier 1725171168Smlaier/* 1726171168Smlaier * Need to modulate the sequence numbers in the TCP SACK option 1727171168Smlaier * (credits to Krzysztof Pfaff for report and patch) 1728171168Smlaier */ 1729171168Smlaierint 1730171168Smlaierpf_modulate_sack(struct mbuf *m, int off, struct pf_pdesc *pd, 1731171168Smlaier struct tcphdr *th, struct pf_state_peer *dst) 1732171168Smlaier{ 1733171168Smlaier int hlen = (th->th_off << 2) - sizeof(*th), thoptlen = hlen; 1734171168Smlaier#ifdef __FreeBSD__ 1735171168Smlaier u_int8_t opts[TCP_MAXOLEN], *opt = opts; 1736171168Smlaier#else 1737171168Smlaier u_int8_t opts[MAX_TCPOPTLEN], *opt = opts; 1738171168Smlaier#endif 1739171168Smlaier int copyback = 0, i, olen; 1740171168Smlaier struct sackblk sack; 1741171168Smlaier 1742171168Smlaier#define TCPOLEN_SACKLEN (TCPOLEN_SACK + 2) 1743171168Smlaier if (hlen < TCPOLEN_SACKLEN || 1744171168Smlaier !pf_pull_hdr(m, off + sizeof(*th), opts, hlen, NULL, NULL, pd->af)) 1745171168Smlaier return 0; 1746171168Smlaier 1747171168Smlaier while (hlen >= TCPOLEN_SACKLEN) { 1748171168Smlaier olen = opt[1]; 1749171168Smlaier switch (*opt) { 1750171168Smlaier case TCPOPT_EOL: /* FALLTHROUGH */ 1751171168Smlaier case TCPOPT_NOP: 1752171168Smlaier opt++; 1753171168Smlaier hlen--; 1754171168Smlaier break; 1755171168Smlaier case TCPOPT_SACK: 1756171168Smlaier if (olen > hlen) 1757171168Smlaier olen = hlen; 1758171168Smlaier if (olen >= TCPOLEN_SACKLEN) { 1759171168Smlaier for (i = 2; i + TCPOLEN_SACK <= olen; 1760171168Smlaier i += TCPOLEN_SACK) { 1761171168Smlaier memcpy(&sack, &opt[i], sizeof(sack)); 1762171168Smlaier pf_change_a(&sack.start, &th->th_sum, 1763171168Smlaier htonl(ntohl(sack.start) - 1764171168Smlaier dst->seqdiff), 0); 1765171168Smlaier pf_change_a(&sack.end, &th->th_sum, 1766171168Smlaier htonl(ntohl(sack.end) - 1767171168Smlaier dst->seqdiff), 0); 1768171168Smlaier memcpy(&opt[i], &sack, sizeof(sack)); 1769171168Smlaier } 1770171168Smlaier copyback = 1; 1771171168Smlaier } 1772171168Smlaier /* FALLTHROUGH */ 1773171168Smlaier default: 1774171168Smlaier if (olen < 2) 1775171168Smlaier olen = 2; 1776171168Smlaier hlen -= olen; 1777171168Smlaier opt += olen; 1778171168Smlaier } 1779171168Smlaier } 1780171168Smlaier 1781171168Smlaier if (copyback) 1782171168Smlaier#ifdef __FreeBSD__ 1783171168Smlaier m_copyback(m, off + sizeof(*th), thoptlen, (caddr_t)opts); 1784171168Smlaier#else 1785171168Smlaier m_copyback(m, off + sizeof(*th), thoptlen, opts); 1786171168Smlaier#endif 1787171168Smlaier return (copyback); 1788171168Smlaier} 1789171168Smlaier 1790126258Smlaiervoid 1791162238Scsjp#ifdef __FreeBSD__ 1792162238Scsjppf_send_tcp(struct mbuf *replyto, const struct pf_rule *r, sa_family_t af, 1793162238Scsjp#else 1794126258Smlaierpf_send_tcp(const struct pf_rule *r, sa_family_t af, 1795162238Scsjp#endif 1796126258Smlaier const struct pf_addr *saddr, const struct pf_addr *daddr, 1797126258Smlaier u_int16_t sport, u_int16_t dport, u_int32_t seq, u_int32_t ack, 1798145836Smlaier u_int8_t flags, u_int16_t win, u_int16_t mss, u_int8_t ttl, int tag, 1799171168Smlaier u_int16_t rtag, struct ether_header *eh, struct ifnet *ifp) 1800126258Smlaier{ 1801126258Smlaier struct mbuf *m; 1802171168Smlaier int len, tlen; 1803126258Smlaier#ifdef INET 1804171168Smlaier struct ip *h; 1805126258Smlaier#endif /* INET */ 1806126258Smlaier#ifdef INET6 1807171168Smlaier struct ip6_hdr *h6; 1808126258Smlaier#endif /* INET6 */ 1809171168Smlaier struct tcphdr *th; 1810171168Smlaier char *opt; 1811171168Smlaier struct pf_mtag *pf_mtag; 1812126258Smlaier 1813171168Smlaier#ifdef __FreeBSD__ 1814171168Smlaier KASSERT( 1815171168Smlaier#ifdef INET 1816171168Smlaier af == AF_INET 1817171168Smlaier#else 1818171168Smlaier 0 1819171168Smlaier#endif 1820171168Smlaier || 1821171168Smlaier#ifdef INET6 1822171168Smlaier af == AF_INET6 1823171168Smlaier#else 1824171168Smlaier 0 1825171168Smlaier#endif 1826171168Smlaier , ("Unsupported AF %d", af)); 1827171168Smlaier len = 0; 1828171168Smlaier th = NULL; 1829171168Smlaier#ifdef INET 1830171168Smlaier h = NULL; 1831171168Smlaier#endif 1832171168Smlaier#ifdef INET6 1833171168Smlaier h6 = NULL; 1834171168Smlaier#endif 1835171168Smlaier#endif 1836171168Smlaier 1837126258Smlaier /* maximum segment size tcp option */ 1838126258Smlaier tlen = sizeof(struct tcphdr); 1839126258Smlaier if (mss) 1840126258Smlaier tlen += 4; 1841126258Smlaier 1842126258Smlaier switch (af) { 1843126258Smlaier#ifdef INET 1844126258Smlaier case AF_INET: 1845126258Smlaier len = sizeof(struct ip) + tlen; 1846126258Smlaier break; 1847126258Smlaier#endif /* INET */ 1848126258Smlaier#ifdef INET6 1849126258Smlaier case AF_INET6: 1850126258Smlaier len = sizeof(struct ip6_hdr) + tlen; 1851126258Smlaier break; 1852126258Smlaier#endif /* INET6 */ 1853126258Smlaier } 1854126258Smlaier 1855126258Smlaier /* create outgoing mbuf */ 1856132280Smlaier m = m_gethdr(M_DONTWAIT, MT_HEADER); 1857132280Smlaier if (m == NULL) 1858132280Smlaier return; 1859162238Scsjp#ifdef __FreeBSD__ 1860162238Scsjp#ifdef MAC 1861162238Scsjp if (replyto) 1862173102Srwatson mac_netinet_firewall_reply(replyto, m); 1863162238Scsjp else 1864173018Srwatson mac_netinet_firewall_send(m); 1865162238Scsjp#else 1866162238Scsjp (void)replyto; 1867162238Scsjp#endif 1868162238Scsjp#endif 1869171168Smlaier if ((pf_mtag = pf_get_mtag(m)) == NULL) { 1870171168Smlaier m_freem(m); 1871171168Smlaier return; 1872171168Smlaier } 1873171168Smlaier if (tag) 1874145836Smlaier#ifdef __FreeBSD__ 1875145836Smlaier m->m_flags |= M_SKIP_FIREWALL; 1876132280Smlaier#else 1877171168Smlaier pf_mtag->flags |= PF_TAG_GENERATED; 1878171168Smlaier#endif 1879145836Smlaier 1880171168Smlaier pf_mtag->tag = rtag; 1881171168Smlaier 1882171168Smlaier if (r != NULL && r->rtableid >= 0) 1883178888Sjulian#ifdef __FreeBSD__ 1884178888Sjulian { 1885178888Sjulian M_SETFIB(m, r->rtableid); 1886178888Sjulian#endif 1887171168Smlaier pf_mtag->rtableid = r->rtableid; 1888178888Sjulian#ifdef __FreeBSD__ 1889178888Sjulian } 1890178888Sjulian#endif 1891126258Smlaier#ifdef ALTQ 1892126258Smlaier if (r != NULL && r->qid) { 1893171168Smlaier pf_mtag->qid = r->qid; 1894171168Smlaier /* add hints for ecn */ 1895171168Smlaier pf_mtag->af = af; 1896171168Smlaier pf_mtag->hdr = mtod(m, struct ip *); 1897126258Smlaier } 1898145836Smlaier#endif /* ALTQ */ 1899126258Smlaier m->m_data += max_linkhdr; 1900126258Smlaier m->m_pkthdr.len = m->m_len = len; 1901126258Smlaier m->m_pkthdr.rcvif = NULL; 1902126258Smlaier bzero(m->m_data, len); 1903126258Smlaier switch (af) { 1904126258Smlaier#ifdef INET 1905126258Smlaier case AF_INET: 1906126258Smlaier h = mtod(m, struct ip *); 1907126258Smlaier 1908126258Smlaier /* IP header fields included in the TCP checksum */ 1909126258Smlaier h->ip_p = IPPROTO_TCP; 1910126258Smlaier h->ip_len = htons(tlen); 1911126258Smlaier h->ip_src.s_addr = saddr->v4.s_addr; 1912126258Smlaier h->ip_dst.s_addr = daddr->v4.s_addr; 1913126258Smlaier 1914126258Smlaier th = (struct tcphdr *)((caddr_t)h + sizeof(struct ip)); 1915126258Smlaier break; 1916126258Smlaier#endif /* INET */ 1917126258Smlaier#ifdef INET6 1918126258Smlaier case AF_INET6: 1919126258Smlaier h6 = mtod(m, struct ip6_hdr *); 1920126258Smlaier 1921126258Smlaier /* IP header fields included in the TCP checksum */ 1922126258Smlaier h6->ip6_nxt = IPPROTO_TCP; 1923126258Smlaier h6->ip6_plen = htons(tlen); 1924126258Smlaier memcpy(&h6->ip6_src, &saddr->v6, sizeof(struct in6_addr)); 1925126258Smlaier memcpy(&h6->ip6_dst, &daddr->v6, sizeof(struct in6_addr)); 1926126258Smlaier 1927126258Smlaier th = (struct tcphdr *)((caddr_t)h6 + sizeof(struct ip6_hdr)); 1928126258Smlaier break; 1929126258Smlaier#endif /* INET6 */ 1930126258Smlaier } 1931126258Smlaier 1932126258Smlaier /* TCP header */ 1933126258Smlaier th->th_sport = sport; 1934126258Smlaier th->th_dport = dport; 1935126258Smlaier th->th_seq = htonl(seq); 1936126258Smlaier th->th_ack = htonl(ack); 1937126258Smlaier th->th_off = tlen >> 2; 1938126258Smlaier th->th_flags = flags; 1939126258Smlaier th->th_win = htons(win); 1940126258Smlaier 1941126258Smlaier if (mss) { 1942126258Smlaier opt = (char *)(th + 1); 1943126258Smlaier opt[0] = TCPOPT_MAXSEG; 1944126258Smlaier opt[1] = 4; 1945126258Smlaier HTONS(mss); 1946126258Smlaier bcopy((caddr_t)&mss, (caddr_t)(opt + 2), 2); 1947126258Smlaier } 1948126258Smlaier 1949126258Smlaier switch (af) { 1950126258Smlaier#ifdef INET 1951126258Smlaier case AF_INET: 1952126258Smlaier /* TCP checksum */ 1953126258Smlaier th->th_sum = in_cksum(m, len); 1954126258Smlaier 1955126258Smlaier /* Finish the IP header */ 1956126258Smlaier h->ip_v = 4; 1957126258Smlaier h->ip_hl = sizeof(*h) >> 2; 1958126258Smlaier h->ip_tos = IPTOS_LOWDELAY; 1959127145Smlaier#ifdef __FreeBSD__ 1960181803Sbz h->ip_off = V_path_mtu_discovery ? IP_DF : 0; 1961130613Smlaier h->ip_len = len; 1962126261Smlaier#else 1963126261Smlaier h->ip_off = htons(ip_mtudisc ? IP_DF : 0); 1964130613Smlaier h->ip_len = htons(len); 1965126261Smlaier#endif 1966181803Sbz h->ip_ttl = ttl ? ttl : V_ip_defttl; 1967126258Smlaier h->ip_sum = 0; 1968145836Smlaier if (eh == NULL) { 1969127145Smlaier#ifdef __FreeBSD__ 1970145836Smlaier PF_UNLOCK(); 1971145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1972145836Smlaier (void *)NULL, (void *)NULL); 1973145836Smlaier PF_LOCK(); 1974126261Smlaier#else /* ! __FreeBSD__ */ 1975145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1976145836Smlaier (void *)NULL, (void *)NULL); 1977126261Smlaier#endif 1978145836Smlaier } else { 1979145836Smlaier struct route ro; 1980145836Smlaier struct rtentry rt; 1981145836Smlaier struct ether_header *e = (void *)ro.ro_dst.sa_data; 1982145836Smlaier 1983145836Smlaier if (ifp == NULL) { 1984145836Smlaier m_freem(m); 1985145836Smlaier return; 1986145836Smlaier } 1987145836Smlaier rt.rt_ifp = ifp; 1988145836Smlaier ro.ro_rt = &rt; 1989145836Smlaier ro.ro_dst.sa_len = sizeof(ro.ro_dst); 1990145836Smlaier ro.ro_dst.sa_family = pseudo_AF_HDRCMPLT; 1991145836Smlaier bcopy(eh->ether_dhost, e->ether_shost, ETHER_ADDR_LEN); 1992145836Smlaier bcopy(eh->ether_shost, e->ether_dhost, ETHER_ADDR_LEN); 1993145836Smlaier e->ether_type = eh->ether_type; 1994145836Smlaier#ifdef __FreeBSD__ 1995145836Smlaier PF_UNLOCK(); 1996145836Smlaier /* XXX_IMPORT: later */ 1997145836Smlaier ip_output(m, (void *)NULL, &ro, 0, 1998145836Smlaier (void *)NULL, (void *)NULL); 1999145836Smlaier PF_LOCK(); 2000145836Smlaier#else /* ! __FreeBSD__ */ 2001145836Smlaier ip_output(m, (void *)NULL, &ro, IP_ROUTETOETHER, 2002145836Smlaier (void *)NULL, (void *)NULL); 2003145836Smlaier#endif 2004145836Smlaier } 2005126258Smlaier break; 2006126258Smlaier#endif /* INET */ 2007126258Smlaier#ifdef INET6 2008126258Smlaier case AF_INET6: 2009126258Smlaier /* TCP checksum */ 2010126258Smlaier th->th_sum = in6_cksum(m, IPPROTO_TCP, 2011126258Smlaier sizeof(struct ip6_hdr), tlen); 2012126258Smlaier 2013126258Smlaier h6->ip6_vfc |= IPV6_VERSION; 2014126258Smlaier h6->ip6_hlim = IPV6_DEFHLIM; 2015126258Smlaier 2016127145Smlaier#ifdef __FreeBSD__ 2017126261Smlaier PF_UNLOCK(); 2018126261Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL); 2019126261Smlaier PF_LOCK(); 2020126261Smlaier#else 2021126258Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL); 2022126261Smlaier#endif 2023126258Smlaier break; 2024126258Smlaier#endif /* INET6 */ 2025126258Smlaier } 2026126258Smlaier} 2027126258Smlaier 2028126258Smlaiervoid 2029126258Smlaierpf_send_icmp(struct mbuf *m, u_int8_t type, u_int8_t code, sa_family_t af, 2030126258Smlaier struct pf_rule *r) 2031126258Smlaier{ 2032171168Smlaier struct pf_mtag *pf_mtag; 2033126258Smlaier struct mbuf *m0; 2034127145Smlaier#ifdef __FreeBSD__ 2035126261Smlaier struct ip *ip; 2036126261Smlaier#endif 2037126258Smlaier 2038132280Smlaier#ifdef __FreeBSD__ 2039132280Smlaier m0 = m_copypacket(m, M_DONTWAIT); 2040132280Smlaier if (m0 == NULL) 2041132280Smlaier return; 2042132280Smlaier#else 2043126258Smlaier m0 = m_copy(m, 0, M_COPYALL); 2044171168Smlaier#endif 2045171168Smlaier if ((pf_mtag = pf_get_mtag(m0)) == NULL) 2046126258Smlaier return; 2047171168Smlaier#ifdef __FreeBSD__ 2048171168Smlaier /* XXX: revisit */ 2049171168Smlaier m0->m_flags |= M_SKIP_FIREWALL; 2050171168Smlaier#else 2051171168Smlaier pf_mtag->flags |= PF_TAG_GENERATED; 2052132280Smlaier#endif 2053126258Smlaier 2054171168Smlaier if (r->rtableid >= 0) 2055178888Sjulian#ifdef __FreeBSD__ 2056178888Sjulian { 2057178888Sjulian M_SETFIB(m0, r->rtableid); 2058178888Sjulian#endif 2059171168Smlaier pf_mtag->rtableid = r->rtableid; 2060178888Sjulian#ifdef __FreeBSD__ 2061178888Sjulian } 2062178888Sjulian#endif 2063171168Smlaier 2064126258Smlaier#ifdef ALTQ 2065126258Smlaier if (r->qid) { 2066171168Smlaier pf_mtag->qid = r->qid; 2067171168Smlaier /* add hints for ecn */ 2068171168Smlaier pf_mtag->af = af; 2069171168Smlaier pf_mtag->hdr = mtod(m0, struct ip *); 2070126258Smlaier } 2071145836Smlaier#endif /* ALTQ */ 2072126258Smlaier 2073126258Smlaier switch (af) { 2074126258Smlaier#ifdef INET 2075126258Smlaier case AF_INET: 2076127145Smlaier#ifdef __FreeBSD__ 2077126261Smlaier /* icmp_error() expects host byte ordering */ 2078126261Smlaier ip = mtod(m0, struct ip *); 2079126261Smlaier NTOHS(ip->ip_len); 2080126261Smlaier NTOHS(ip->ip_off); 2081126261Smlaier PF_UNLOCK(); 2082145863Sandre icmp_error(m0, type, code, 0, 0); 2083126261Smlaier PF_LOCK(); 2084145874Smlaier#else 2085171168Smlaier icmp_error(m0, type, code, 0, 0); 2086126261Smlaier#endif 2087126258Smlaier break; 2088126258Smlaier#endif /* INET */ 2089126258Smlaier#ifdef INET6 2090126258Smlaier case AF_INET6: 2091127145Smlaier#ifdef __FreeBSD__ 2092126261Smlaier PF_UNLOCK(); 2093126261Smlaier#endif 2094126258Smlaier icmp6_error(m0, type, code, 0); 2095127145Smlaier#ifdef __FreeBSD__ 2096126261Smlaier PF_LOCK(); 2097126261Smlaier#endif 2098126258Smlaier break; 2099126258Smlaier#endif /* INET6 */ 2100126258Smlaier } 2101126258Smlaier} 2102126258Smlaier 2103126258Smlaier/* 2104126258Smlaier * Return 1 if the addresses a and b match (with mask m), otherwise return 0. 2105126258Smlaier * If n is 0, they match if they are equal. If n is != 0, they match if they 2106126258Smlaier * are different. 2107126258Smlaier */ 2108126258Smlaierint 2109126258Smlaierpf_match_addr(u_int8_t n, struct pf_addr *a, struct pf_addr *m, 2110126258Smlaier struct pf_addr *b, sa_family_t af) 2111126258Smlaier{ 2112126258Smlaier int match = 0; 2113126258Smlaier 2114126258Smlaier switch (af) { 2115126258Smlaier#ifdef INET 2116126258Smlaier case AF_INET: 2117126258Smlaier if ((a->addr32[0] & m->addr32[0]) == 2118126258Smlaier (b->addr32[0] & m->addr32[0])) 2119126258Smlaier match++; 2120126258Smlaier break; 2121126258Smlaier#endif /* INET */ 2122126258Smlaier#ifdef INET6 2123126258Smlaier case AF_INET6: 2124126258Smlaier if (((a->addr32[0] & m->addr32[0]) == 2125126258Smlaier (b->addr32[0] & m->addr32[0])) && 2126126258Smlaier ((a->addr32[1] & m->addr32[1]) == 2127126258Smlaier (b->addr32[1] & m->addr32[1])) && 2128126258Smlaier ((a->addr32[2] & m->addr32[2]) == 2129126258Smlaier (b->addr32[2] & m->addr32[2])) && 2130126258Smlaier ((a->addr32[3] & m->addr32[3]) == 2131126258Smlaier (b->addr32[3] & m->addr32[3]))) 2132126258Smlaier match++; 2133126258Smlaier break; 2134126258Smlaier#endif /* INET6 */ 2135126258Smlaier } 2136126258Smlaier if (match) { 2137126258Smlaier if (n) 2138126258Smlaier return (0); 2139126258Smlaier else 2140126258Smlaier return (1); 2141126258Smlaier } else { 2142126258Smlaier if (n) 2143126258Smlaier return (1); 2144126258Smlaier else 2145126258Smlaier return (0); 2146126258Smlaier } 2147126258Smlaier} 2148126258Smlaier 2149126258Smlaierint 2150126258Smlaierpf_match(u_int8_t op, u_int32_t a1, u_int32_t a2, u_int32_t p) 2151126258Smlaier{ 2152126258Smlaier switch (op) { 2153126258Smlaier case PF_OP_IRG: 2154126258Smlaier return ((p > a1) && (p < a2)); 2155126258Smlaier case PF_OP_XRG: 2156126258Smlaier return ((p < a1) || (p > a2)); 2157126258Smlaier case PF_OP_RRG: 2158126258Smlaier return ((p >= a1) && (p <= a2)); 2159126258Smlaier case PF_OP_EQ: 2160126258Smlaier return (p == a1); 2161126258Smlaier case PF_OP_NE: 2162126258Smlaier return (p != a1); 2163126258Smlaier case PF_OP_LT: 2164126258Smlaier return (p < a1); 2165126258Smlaier case PF_OP_LE: 2166126258Smlaier return (p <= a1); 2167126258Smlaier case PF_OP_GT: 2168126258Smlaier return (p > a1); 2169126258Smlaier case PF_OP_GE: 2170126258Smlaier return (p >= a1); 2171126258Smlaier } 2172126258Smlaier return (0); /* never reached */ 2173126258Smlaier} 2174126258Smlaier 2175126258Smlaierint 2176126258Smlaierpf_match_port(u_int8_t op, u_int16_t a1, u_int16_t a2, u_int16_t p) 2177126258Smlaier{ 2178126258Smlaier NTOHS(a1); 2179126258Smlaier NTOHS(a2); 2180126258Smlaier NTOHS(p); 2181126258Smlaier return (pf_match(op, a1, a2, p)); 2182126258Smlaier} 2183126258Smlaier 2184126258Smlaierint 2185126258Smlaierpf_match_uid(u_int8_t op, uid_t a1, uid_t a2, uid_t u) 2186126258Smlaier{ 2187126258Smlaier if (u == UID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 2188126258Smlaier return (0); 2189126258Smlaier return (pf_match(op, a1, a2, u)); 2190126258Smlaier} 2191126258Smlaier 2192126258Smlaierint 2193126258Smlaierpf_match_gid(u_int8_t op, gid_t a1, gid_t a2, gid_t g) 2194126258Smlaier{ 2195126258Smlaier if (g == GID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 2196126258Smlaier return (0); 2197126258Smlaier return (pf_match(op, a1, a2, g)); 2198126258Smlaier} 2199126258Smlaier 2200171168Smlaier#ifndef __FreeBSD__ 2201171168Smlaierstruct pf_mtag * 2202171168Smlaierpf_find_mtag(struct mbuf *m) 2203126258Smlaier{ 2204126258Smlaier struct m_tag *mtag; 2205126258Smlaier 2206171168Smlaier if ((mtag = m_tag_find(m, PACKET_TAG_PF, NULL)) == NULL) 2207126258Smlaier return (NULL); 2208171168Smlaier 2209171168Smlaier return ((struct pf_mtag *)(mtag + 1)); 2210126258Smlaier} 2211126258Smlaier 2212171168Smlaierstruct pf_mtag * 2213171168Smlaierpf_get_mtag(struct mbuf *m) 2214126258Smlaier{ 2215171168Smlaier struct m_tag *mtag; 2216171168Smlaier 2217171168Smlaier if ((mtag = m_tag_find(m, PACKET_TAG_PF, NULL)) == NULL) { 2218171168Smlaier mtag = m_tag_get(PACKET_TAG_PF, sizeof(struct pf_mtag), 2219171168Smlaier M_NOWAIT); 2220171168Smlaier if (mtag == NULL) 2221171168Smlaier return (NULL); 2222171168Smlaier bzero(mtag + 1, sizeof(struct pf_mtag)); 2223171168Smlaier m_tag_prepend(m, mtag); 2224126258Smlaier } 2225126258Smlaier 2226171168Smlaier return ((struct pf_mtag *)(mtag + 1)); 2227171168Smlaier} 2228171168Smlaier#endif 2229171168Smlaier 2230171168Smlaierint 2231171168Smlaierpf_match_tag(struct mbuf *m, struct pf_rule *r, struct pf_mtag *pf_mtag, 2232171168Smlaier int *tag) 2233171168Smlaier{ 2234171168Smlaier if (*tag == -1) 2235171168Smlaier *tag = pf_mtag->tag; 2236171168Smlaier 2237126258Smlaier return ((!r->match_tag_not && r->match_tag == *tag) || 2238126258Smlaier (r->match_tag_not && r->match_tag != *tag)); 2239126258Smlaier} 2240126258Smlaier 2241126258Smlaierint 2242171168Smlaierpf_tag_packet(struct mbuf *m, struct pf_mtag *pf_mtag, int tag, int rtableid) 2243126258Smlaier{ 2244171168Smlaier if (tag <= 0 && rtableid < 0) 2245126258Smlaier return (0); 2246126258Smlaier 2247171168Smlaier if (pf_mtag == NULL) 2248171168Smlaier if ((pf_mtag = pf_get_mtag(m)) == NULL) 2249126258Smlaier return (1); 2250171168Smlaier if (tag > 0) 2251171168Smlaier pf_mtag->tag = tag; 2252171168Smlaier if (rtableid >= 0) 2253178888Sjulian#ifdef __FreeBSD__ 2254178888Sjulian { 2255178888Sjulian M_SETFIB(m, rtableid); 2256178888Sjulian#endif 2257171168Smlaier pf_mtag->rtableid = rtableid; 2258178888Sjulian#ifdef __FreeBSD__ 2259178888Sjulian } 2260178888Sjulian#endif 2261126258Smlaier 2262126258Smlaier return (0); 2263126258Smlaier} 2264126258Smlaier 2265145836Smlaierstatic void 2266145836Smlaierpf_step_into_anchor(int *depth, struct pf_ruleset **rs, int n, 2267171168Smlaier struct pf_rule **r, struct pf_rule **a, int *match) 2268145836Smlaier{ 2269145836Smlaier struct pf_anchor_stackframe *f; 2270126258Smlaier 2271171168Smlaier (*r)->anchor->match = 0; 2272171168Smlaier if (match) 2273171168Smlaier *match = 0; 2274145836Smlaier if (*depth >= sizeof(pf_anchor_stack) / 2275145836Smlaier sizeof(pf_anchor_stack[0])) { 2276145836Smlaier printf("pf_step_into_anchor: stack overflow\n"); 2277145836Smlaier *r = TAILQ_NEXT(*r, entries); 2278145836Smlaier return; 2279145836Smlaier } else if (*depth == 0 && a != NULL) 2280145836Smlaier *a = *r; 2281145836Smlaier f = pf_anchor_stack + (*depth)++; 2282145836Smlaier f->rs = *rs; 2283145836Smlaier f->r = *r; 2284145836Smlaier if ((*r)->anchor_wildcard) { 2285145836Smlaier f->parent = &(*r)->anchor->children; 2286145836Smlaier if ((f->child = RB_MIN(pf_anchor_node, f->parent)) == 2287145836Smlaier NULL) { 2288145836Smlaier *r = NULL; 2289145836Smlaier return; 2290145836Smlaier } 2291145836Smlaier *rs = &f->child->ruleset; 2292145836Smlaier } else { 2293145836Smlaier f->parent = NULL; 2294145836Smlaier f->child = NULL; 2295145836Smlaier *rs = &(*r)->anchor->ruleset; 2296145836Smlaier } 2297145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 2298145836Smlaier} 2299126258Smlaier 2300171168Smlaierint 2301145836Smlaierpf_step_out_of_anchor(int *depth, struct pf_ruleset **rs, int n, 2302171168Smlaier struct pf_rule **r, struct pf_rule **a, int *match) 2303145836Smlaier{ 2304145836Smlaier struct pf_anchor_stackframe *f; 2305171168Smlaier int quick = 0; 2306145836Smlaier 2307145836Smlaier do { 2308145836Smlaier if (*depth <= 0) 2309145836Smlaier break; 2310145836Smlaier f = pf_anchor_stack + *depth - 1; 2311145836Smlaier if (f->parent != NULL && f->child != NULL) { 2312171168Smlaier if (f->child->match || 2313171168Smlaier (match != NULL && *match)) { 2314171168Smlaier f->r->anchor->match = 1; 2315171168Smlaier *match = 0; 2316171168Smlaier } 2317145836Smlaier f->child = RB_NEXT(pf_anchor_node, f->parent, f->child); 2318145836Smlaier if (f->child != NULL) { 2319145836Smlaier *rs = &f->child->ruleset; 2320145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 2321145836Smlaier if (*r == NULL) 2322145836Smlaier continue; 2323145836Smlaier else 2324145836Smlaier break; 2325145836Smlaier } 2326145836Smlaier } 2327145836Smlaier (*depth)--; 2328145836Smlaier if (*depth == 0 && a != NULL) 2329145836Smlaier *a = NULL; 2330145836Smlaier *rs = f->rs; 2331171168Smlaier if (f->r->anchor->match || (match != NULL && *match)) 2332171168Smlaier quick = f->r->quick; 2333145836Smlaier *r = TAILQ_NEXT(f->r, entries); 2334145836Smlaier } while (*r == NULL); 2335171168Smlaier 2336171168Smlaier return (quick); 2337145836Smlaier} 2338145836Smlaier 2339126258Smlaier#ifdef INET6 2340126258Smlaiervoid 2341126258Smlaierpf_poolmask(struct pf_addr *naddr, struct pf_addr *raddr, 2342126258Smlaier struct pf_addr *rmask, struct pf_addr *saddr, sa_family_t af) 2343126258Smlaier{ 2344126258Smlaier switch (af) { 2345126258Smlaier#ifdef INET 2346126258Smlaier case AF_INET: 2347126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2348126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2349126258Smlaier break; 2350126258Smlaier#endif /* INET */ 2351126258Smlaier case AF_INET6: 2352126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2353126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2354126258Smlaier naddr->addr32[1] = (raddr->addr32[1] & rmask->addr32[1]) | 2355126258Smlaier ((rmask->addr32[1] ^ 0xffffffff ) & saddr->addr32[1]); 2356126258Smlaier naddr->addr32[2] = (raddr->addr32[2] & rmask->addr32[2]) | 2357126258Smlaier ((rmask->addr32[2] ^ 0xffffffff ) & saddr->addr32[2]); 2358126258Smlaier naddr->addr32[3] = (raddr->addr32[3] & rmask->addr32[3]) | 2359126258Smlaier ((rmask->addr32[3] ^ 0xffffffff ) & saddr->addr32[3]); 2360126258Smlaier break; 2361126258Smlaier } 2362126258Smlaier} 2363126258Smlaier 2364126258Smlaiervoid 2365130613Smlaierpf_addr_inc(struct pf_addr *addr, sa_family_t af) 2366126258Smlaier{ 2367126258Smlaier switch (af) { 2368126258Smlaier#ifdef INET 2369126258Smlaier case AF_INET: 2370126258Smlaier addr->addr32[0] = htonl(ntohl(addr->addr32[0]) + 1); 2371126258Smlaier break; 2372126258Smlaier#endif /* INET */ 2373126258Smlaier case AF_INET6: 2374126258Smlaier if (addr->addr32[3] == 0xffffffff) { 2375126258Smlaier addr->addr32[3] = 0; 2376126258Smlaier if (addr->addr32[2] == 0xffffffff) { 2377126258Smlaier addr->addr32[2] = 0; 2378126258Smlaier if (addr->addr32[1] == 0xffffffff) { 2379126258Smlaier addr->addr32[1] = 0; 2380126258Smlaier addr->addr32[0] = 2381126258Smlaier htonl(ntohl(addr->addr32[0]) + 1); 2382126258Smlaier } else 2383126258Smlaier addr->addr32[1] = 2384126258Smlaier htonl(ntohl(addr->addr32[1]) + 1); 2385126258Smlaier } else 2386126258Smlaier addr->addr32[2] = 2387126258Smlaier htonl(ntohl(addr->addr32[2]) + 1); 2388126258Smlaier } else 2389126258Smlaier addr->addr32[3] = 2390126258Smlaier htonl(ntohl(addr->addr32[3]) + 1); 2391126258Smlaier break; 2392126258Smlaier } 2393126258Smlaier} 2394126258Smlaier#endif /* INET6 */ 2395126258Smlaier 2396126258Smlaier#define mix(a,b,c) \ 2397126258Smlaier do { \ 2398126258Smlaier a -= b; a -= c; a ^= (c >> 13); \ 2399126258Smlaier b -= c; b -= a; b ^= (a << 8); \ 2400126258Smlaier c -= a; c -= b; c ^= (b >> 13); \ 2401126258Smlaier a -= b; a -= c; a ^= (c >> 12); \ 2402126258Smlaier b -= c; b -= a; b ^= (a << 16); \ 2403126258Smlaier c -= a; c -= b; c ^= (b >> 5); \ 2404126258Smlaier a -= b; a -= c; a ^= (c >> 3); \ 2405126258Smlaier b -= c; b -= a; b ^= (a << 10); \ 2406126258Smlaier c -= a; c -= b; c ^= (b >> 15); \ 2407126258Smlaier } while (0) 2408126258Smlaier 2409126258Smlaier/* 2410126258Smlaier * hash function based on bridge_hash in if_bridge.c 2411126258Smlaier */ 2412126258Smlaiervoid 2413126258Smlaierpf_hash(struct pf_addr *inaddr, struct pf_addr *hash, 2414126258Smlaier struct pf_poolhashkey *key, sa_family_t af) 2415126258Smlaier{ 2416126258Smlaier u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0]; 2417126258Smlaier 2418126258Smlaier switch (af) { 2419126258Smlaier#ifdef INET 2420126258Smlaier case AF_INET: 2421126258Smlaier a += inaddr->addr32[0]; 2422126258Smlaier b += key->key32[1]; 2423126258Smlaier mix(a, b, c); 2424126258Smlaier hash->addr32[0] = c + key->key32[2]; 2425126258Smlaier break; 2426126258Smlaier#endif /* INET */ 2427126258Smlaier#ifdef INET6 2428126258Smlaier case AF_INET6: 2429126258Smlaier a += inaddr->addr32[0]; 2430126258Smlaier b += inaddr->addr32[2]; 2431126258Smlaier mix(a, b, c); 2432126258Smlaier hash->addr32[0] = c; 2433126258Smlaier a += inaddr->addr32[1]; 2434126258Smlaier b += inaddr->addr32[3]; 2435126258Smlaier c += key->key32[1]; 2436126258Smlaier mix(a, b, c); 2437126258Smlaier hash->addr32[1] = c; 2438126258Smlaier a += inaddr->addr32[2]; 2439126258Smlaier b += inaddr->addr32[1]; 2440126258Smlaier c += key->key32[2]; 2441126258Smlaier mix(a, b, c); 2442126258Smlaier hash->addr32[2] = c; 2443126258Smlaier a += inaddr->addr32[3]; 2444126258Smlaier b += inaddr->addr32[0]; 2445126258Smlaier c += key->key32[3]; 2446126258Smlaier mix(a, b, c); 2447126258Smlaier hash->addr32[3] = c; 2448126258Smlaier break; 2449126258Smlaier#endif /* INET6 */ 2450126258Smlaier } 2451126258Smlaier} 2452126258Smlaier 2453126258Smlaierint 2454130613Smlaierpf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr, 2455130613Smlaier struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn) 2456126258Smlaier{ 2457126258Smlaier unsigned char hash[16]; 2458130613Smlaier struct pf_pool *rpool = &r->rpool; 2459130613Smlaier struct pf_addr *raddr = &rpool->cur->addr.v.a.addr; 2460130613Smlaier struct pf_addr *rmask = &rpool->cur->addr.v.a.mask; 2461126258Smlaier struct pf_pooladdr *acur = rpool->cur; 2462130613Smlaier struct pf_src_node k; 2463126258Smlaier 2464130613Smlaier if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR && 2465130613Smlaier (r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2466130613Smlaier k.af = af; 2467130613Smlaier PF_ACPY(&k.addr, saddr, af); 2468130613Smlaier if (r->rule_flag & PFRULE_RULESRCTRACK || 2469130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) 2470130613Smlaier k.rule.ptr = r; 2471130613Smlaier else 2472130613Smlaier k.rule.ptr = NULL; 2473130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 2474130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 2475130613Smlaier if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) { 2476130613Smlaier PF_ACPY(naddr, &(*sn)->raddr, af); 2477130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 2478130613Smlaier printf("pf_map_addr: src tracking maps "); 2479130613Smlaier pf_print_host(&k.addr, 0, af); 2480130613Smlaier printf(" to "); 2481130613Smlaier pf_print_host(naddr, 0, af); 2482130613Smlaier printf("\n"); 2483130613Smlaier } 2484130613Smlaier return (0); 2485130613Smlaier } 2486130613Smlaier } 2487130613Smlaier 2488126258Smlaier if (rpool->cur->addr.type == PF_ADDR_NOROUTE) 2489126258Smlaier return (1); 2490130613Smlaier if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2491145836Smlaier switch (af) { 2492145836Smlaier#ifdef INET 2493145836Smlaier case AF_INET: 2494130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 && 2495130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2496130613Smlaier PF_POOL_ROUNDROBIN) 2497130613Smlaier return (1); 2498130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr4; 2499130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask4; 2500145836Smlaier break; 2501145836Smlaier#endif /* INET */ 2502145836Smlaier#ifdef INET6 2503145836Smlaier case AF_INET6: 2504130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 && 2505130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2506130613Smlaier PF_POOL_ROUNDROBIN) 2507130613Smlaier return (1); 2508130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr6; 2509130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask6; 2510145836Smlaier break; 2511145836Smlaier#endif /* INET6 */ 2512130613Smlaier } 2513130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2514126258Smlaier if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN) 2515126258Smlaier return (1); /* unsupported */ 2516126258Smlaier } else { 2517126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2518126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2519126258Smlaier } 2520126258Smlaier 2521126258Smlaier switch (rpool->opts & PF_POOL_TYPEMASK) { 2522126258Smlaier case PF_POOL_NONE: 2523126258Smlaier PF_ACPY(naddr, raddr, af); 2524126258Smlaier break; 2525126258Smlaier case PF_POOL_BITMASK: 2526126258Smlaier PF_POOLMASK(naddr, raddr, rmask, saddr, af); 2527126258Smlaier break; 2528126258Smlaier case PF_POOL_RANDOM: 2529126258Smlaier if (init_addr != NULL && PF_AZERO(init_addr, af)) { 2530126258Smlaier switch (af) { 2531126258Smlaier#ifdef INET 2532126258Smlaier case AF_INET: 2533145836Smlaier rpool->counter.addr32[0] = htonl(arc4random()); 2534126258Smlaier break; 2535126258Smlaier#endif /* INET */ 2536126258Smlaier#ifdef INET6 2537126258Smlaier case AF_INET6: 2538126258Smlaier if (rmask->addr32[3] != 0xffffffff) 2539145836Smlaier rpool->counter.addr32[3] = 2540145836Smlaier htonl(arc4random()); 2541126258Smlaier else 2542126258Smlaier break; 2543126258Smlaier if (rmask->addr32[2] != 0xffffffff) 2544145836Smlaier rpool->counter.addr32[2] = 2545145836Smlaier htonl(arc4random()); 2546126258Smlaier else 2547126258Smlaier break; 2548126258Smlaier if (rmask->addr32[1] != 0xffffffff) 2549145836Smlaier rpool->counter.addr32[1] = 2550145836Smlaier htonl(arc4random()); 2551126258Smlaier else 2552126258Smlaier break; 2553126258Smlaier if (rmask->addr32[0] != 0xffffffff) 2554145836Smlaier rpool->counter.addr32[0] = 2555145836Smlaier htonl(arc4random()); 2556126258Smlaier break; 2557126258Smlaier#endif /* INET6 */ 2558126258Smlaier } 2559126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2560126258Smlaier PF_ACPY(init_addr, naddr, af); 2561126258Smlaier 2562126258Smlaier } else { 2563126258Smlaier PF_AINC(&rpool->counter, af); 2564126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2565126258Smlaier } 2566126258Smlaier break; 2567126258Smlaier case PF_POOL_SRCHASH: 2568126258Smlaier pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af); 2569126258Smlaier PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af); 2570126258Smlaier break; 2571126258Smlaier case PF_POOL_ROUNDROBIN: 2572126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2573126258Smlaier if (!pfr_pool_get(rpool->cur->addr.p.tbl, 2574126258Smlaier &rpool->tblidx, &rpool->counter, 2575126258Smlaier &raddr, &rmask, af)) 2576126258Smlaier goto get_addr; 2577130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2578130613Smlaier if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2579130613Smlaier &rpool->tblidx, &rpool->counter, 2580130613Smlaier &raddr, &rmask, af)) 2581130613Smlaier goto get_addr; 2582126258Smlaier } else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af)) 2583126258Smlaier goto get_addr; 2584126258Smlaier 2585126258Smlaier try_next: 2586126258Smlaier if ((rpool->cur = TAILQ_NEXT(rpool->cur, entries)) == NULL) 2587126258Smlaier rpool->cur = TAILQ_FIRST(&rpool->list); 2588126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2589126258Smlaier rpool->tblidx = -1; 2590126258Smlaier if (pfr_pool_get(rpool->cur->addr.p.tbl, 2591126258Smlaier &rpool->tblidx, &rpool->counter, 2592126258Smlaier &raddr, &rmask, af)) { 2593130613Smlaier /* table contains no address of type 'af' */ 2594126258Smlaier if (rpool->cur != acur) 2595126258Smlaier goto try_next; 2596126258Smlaier return (1); 2597126258Smlaier } 2598130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2599130613Smlaier rpool->tblidx = -1; 2600130613Smlaier if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2601130613Smlaier &rpool->tblidx, &rpool->counter, 2602130613Smlaier &raddr, &rmask, af)) { 2603130613Smlaier /* table contains no address of type 'af' */ 2604130613Smlaier if (rpool->cur != acur) 2605130613Smlaier goto try_next; 2606130613Smlaier return (1); 2607130613Smlaier } 2608126258Smlaier } else { 2609126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2610126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2611126258Smlaier PF_ACPY(&rpool->counter, raddr, af); 2612126258Smlaier } 2613126258Smlaier 2614126258Smlaier get_addr: 2615126258Smlaier PF_ACPY(naddr, &rpool->counter, af); 2616139045Sdhartmei if (init_addr != NULL && PF_AZERO(init_addr, af)) 2617139045Sdhartmei PF_ACPY(init_addr, naddr, af); 2618126258Smlaier PF_AINC(&rpool->counter, af); 2619126258Smlaier break; 2620126258Smlaier } 2621130613Smlaier if (*sn != NULL) 2622130613Smlaier PF_ACPY(&(*sn)->raddr, naddr, af); 2623126258Smlaier 2624126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC && 2625126258Smlaier (rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2626130613Smlaier printf("pf_map_addr: selected address "); 2627126258Smlaier pf_print_host(naddr, 0, af); 2628126258Smlaier printf("\n"); 2629126258Smlaier } 2630126258Smlaier 2631126258Smlaier return (0); 2632126258Smlaier} 2633126258Smlaier 2634126258Smlaierint 2635130613Smlaierpf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r, 2636126258Smlaier struct pf_addr *saddr, struct pf_addr *daddr, u_int16_t dport, 2637130613Smlaier struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high, 2638130613Smlaier struct pf_src_node **sn) 2639126258Smlaier{ 2640171168Smlaier struct pf_state_cmp key; 2641126258Smlaier struct pf_addr init_addr; 2642126258Smlaier u_int16_t cut; 2643126258Smlaier 2644126258Smlaier bzero(&init_addr, sizeof(init_addr)); 2645130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2646126258Smlaier return (1); 2647126258Smlaier 2648149884Smlaier if (proto == IPPROTO_ICMP) { 2649149884Smlaier low = 1; 2650149884Smlaier high = 65535; 2651149884Smlaier } 2652149884Smlaier 2653126258Smlaier do { 2654126258Smlaier key.af = af; 2655126258Smlaier key.proto = proto; 2656130613Smlaier PF_ACPY(&key.ext.addr, daddr, key.af); 2657130613Smlaier PF_ACPY(&key.gwy.addr, naddr, key.af); 2658130613Smlaier key.ext.port = dport; 2659126258Smlaier 2660126258Smlaier /* 2661126258Smlaier * port search; start random, step; 2662126258Smlaier * similar 2 portloop in in_pcbbind 2663126258Smlaier */ 2664149884Smlaier if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP || 2665149884Smlaier proto == IPPROTO_ICMP)) { 2666139045Sdhartmei key.gwy.port = dport; 2667130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2668126258Smlaier return (0); 2669126258Smlaier } else if (low == 0 && high == 0) { 2670130613Smlaier key.gwy.port = *nport; 2671130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2672126258Smlaier return (0); 2673126258Smlaier } else if (low == high) { 2674130613Smlaier key.gwy.port = htons(low); 2675130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) { 2676126258Smlaier *nport = htons(low); 2677126258Smlaier return (0); 2678126258Smlaier } 2679126258Smlaier } else { 2680126258Smlaier u_int16_t tmp; 2681126258Smlaier 2682126258Smlaier if (low > high) { 2683126258Smlaier tmp = low; 2684126258Smlaier low = high; 2685126258Smlaier high = tmp; 2686126258Smlaier } 2687126258Smlaier /* low < high */ 2688145836Smlaier cut = htonl(arc4random()) % (1 + high - low) + low; 2689126258Smlaier /* low <= cut <= high */ 2690126258Smlaier for (tmp = cut; tmp <= high; ++(tmp)) { 2691130613Smlaier key.gwy.port = htons(tmp); 2692130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2693126258Smlaier NULL) { 2694126258Smlaier *nport = htons(tmp); 2695126258Smlaier return (0); 2696126258Smlaier } 2697126258Smlaier } 2698126258Smlaier for (tmp = cut - 1; tmp >= low; --(tmp)) { 2699130613Smlaier key.gwy.port = htons(tmp); 2700130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2701126258Smlaier NULL) { 2702126258Smlaier *nport = htons(tmp); 2703126258Smlaier return (0); 2704126258Smlaier } 2705126258Smlaier } 2706126258Smlaier } 2707126258Smlaier 2708130613Smlaier switch (r->rpool.opts & PF_POOL_TYPEMASK) { 2709126258Smlaier case PF_POOL_RANDOM: 2710126258Smlaier case PF_POOL_ROUNDROBIN: 2711130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2712126258Smlaier return (1); 2713126258Smlaier break; 2714126258Smlaier case PF_POOL_NONE: 2715126258Smlaier case PF_POOL_SRCHASH: 2716126258Smlaier case PF_POOL_BITMASK: 2717126258Smlaier default: 2718126258Smlaier return (1); 2719126258Smlaier } 2720126258Smlaier } while (! PF_AEQ(&init_addr, naddr, af) ); 2721126258Smlaier 2722126258Smlaier return (1); /* none available */ 2723126258Smlaier} 2724126258Smlaier 2725126258Smlaierstruct pf_rule * 2726126258Smlaierpf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off, 2727130613Smlaier int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport, 2728126258Smlaier struct pf_addr *daddr, u_int16_t dport, int rs_num) 2729126258Smlaier{ 2730145836Smlaier struct pf_rule *r, *rm = NULL; 2731126258Smlaier struct pf_ruleset *ruleset = NULL; 2732145836Smlaier int tag = -1; 2733171168Smlaier int rtableid = -1; 2734145836Smlaier int asd = 0; 2735126258Smlaier 2736126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr); 2737126258Smlaier while (r && rm == NULL) { 2738126258Smlaier struct pf_rule_addr *src = NULL, *dst = NULL; 2739126258Smlaier struct pf_addr_wrap *xdst = NULL; 2740126258Smlaier 2741126258Smlaier if (r->action == PF_BINAT && direction == PF_IN) { 2742126258Smlaier src = &r->dst; 2743126258Smlaier if (r->rpool.cur != NULL) 2744126258Smlaier xdst = &r->rpool.cur->addr; 2745126258Smlaier } else { 2746126258Smlaier src = &r->src; 2747126258Smlaier dst = &r->dst; 2748126258Smlaier } 2749126258Smlaier 2750126258Smlaier r->evaluations++; 2751171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 2752126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 2753126258Smlaier else if (r->direction && r->direction != direction) 2754126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 2755126258Smlaier else if (r->af && r->af != pd->af) 2756126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 2757126258Smlaier else if (r->proto && r->proto != pd->proto) 2758126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 2759171168Smlaier else if (PF_MISMATCHAW(&src->addr, saddr, pd->af, 2760171168Smlaier src->neg, kif)) 2761126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR : 2762126258Smlaier PF_SKIP_DST_ADDR].ptr; 2763126258Smlaier else if (src->port_op && !pf_match_port(src->port_op, 2764126258Smlaier src->port[0], src->port[1], sport)) 2765126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT : 2766126258Smlaier PF_SKIP_DST_PORT].ptr; 2767126258Smlaier else if (dst != NULL && 2768171168Smlaier PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->neg, NULL)) 2769126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 2770171168Smlaier else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af, 2771171168Smlaier 0, NULL)) 2772126258Smlaier r = TAILQ_NEXT(r, entries); 2773126258Smlaier else if (dst != NULL && dst->port_op && 2774126258Smlaier !pf_match_port(dst->port_op, dst->port[0], 2775126258Smlaier dst->port[1], dport)) 2776126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 2777171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 2778145836Smlaier r = TAILQ_NEXT(r, entries); 2779126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto != 2780126258Smlaier IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m, 2781126258Smlaier off, pd->hdr.tcp), r->os_fingerprint))) 2782126258Smlaier r = TAILQ_NEXT(r, entries); 2783145836Smlaier else { 2784145836Smlaier if (r->tag) 2785145836Smlaier tag = r->tag; 2786171168Smlaier if (r->rtableid >= 0) 2787171168Smlaier rtableid = r->rtableid; 2788145836Smlaier if (r->anchor == NULL) { 2789126258Smlaier rm = r; 2790145836Smlaier } else 2791171168Smlaier pf_step_into_anchor(&asd, &ruleset, rs_num, 2792171168Smlaier &r, NULL, NULL); 2793145836Smlaier } 2794145836Smlaier if (r == NULL) 2795171168Smlaier pf_step_out_of_anchor(&asd, &ruleset, rs_num, &r, 2796171168Smlaier NULL, NULL); 2797126258Smlaier } 2798171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, rtableid)) 2799145836Smlaier return (NULL); 2800126258Smlaier if (rm != NULL && (rm->action == PF_NONAT || 2801126258Smlaier rm->action == PF_NORDR || rm->action == PF_NOBINAT)) 2802126258Smlaier return (NULL); 2803126258Smlaier return (rm); 2804126258Smlaier} 2805126258Smlaier 2806126258Smlaierstruct pf_rule * 2807126258Smlaierpf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction, 2808130613Smlaier struct pfi_kif *kif, struct pf_src_node **sn, 2809126258Smlaier struct pf_addr *saddr, u_int16_t sport, 2810126258Smlaier struct pf_addr *daddr, u_int16_t dport, 2811126258Smlaier struct pf_addr *naddr, u_int16_t *nport) 2812126258Smlaier{ 2813126258Smlaier struct pf_rule *r = NULL; 2814126258Smlaier 2815126258Smlaier if (direction == PF_OUT) { 2816130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2817126258Smlaier sport, daddr, dport, PF_RULESET_BINAT); 2818126258Smlaier if (r == NULL) 2819130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2820126258Smlaier saddr, sport, daddr, dport, PF_RULESET_NAT); 2821126258Smlaier } else { 2822130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2823126258Smlaier sport, daddr, dport, PF_RULESET_RDR); 2824126258Smlaier if (r == NULL) 2825130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2826126258Smlaier saddr, sport, daddr, dport, PF_RULESET_BINAT); 2827126258Smlaier } 2828126258Smlaier 2829126258Smlaier if (r != NULL) { 2830126258Smlaier switch (r->action) { 2831126258Smlaier case PF_NONAT: 2832126258Smlaier case PF_NOBINAT: 2833126258Smlaier case PF_NORDR: 2834126258Smlaier return (NULL); 2835126258Smlaier case PF_NAT: 2836130613Smlaier if (pf_get_sport(pd->af, pd->proto, r, saddr, 2837126258Smlaier daddr, dport, naddr, nport, r->rpool.proxy_port[0], 2838130613Smlaier r->rpool.proxy_port[1], sn)) { 2839126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 2840126258Smlaier ("pf: NAT proxy port allocation " 2841126258Smlaier "(%u-%u) failed\n", 2842126258Smlaier r->rpool.proxy_port[0], 2843126258Smlaier r->rpool.proxy_port[1])); 2844126258Smlaier return (NULL); 2845126258Smlaier } 2846126258Smlaier break; 2847126258Smlaier case PF_BINAT: 2848126258Smlaier switch (direction) { 2849126258Smlaier case PF_OUT: 2850130613Smlaier if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){ 2851145836Smlaier switch (pd->af) { 2852145836Smlaier#ifdef INET 2853145836Smlaier case AF_INET: 2854130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2855130613Smlaier pfid_acnt4 < 1) 2856130613Smlaier return (NULL); 2857130613Smlaier PF_POOLMASK(naddr, 2858130613Smlaier &r->rpool.cur->addr.p.dyn-> 2859130613Smlaier pfid_addr4, 2860130613Smlaier &r->rpool.cur->addr.p.dyn-> 2861130613Smlaier pfid_mask4, 2862130613Smlaier saddr, AF_INET); 2863145836Smlaier break; 2864145836Smlaier#endif /* INET */ 2865145836Smlaier#ifdef INET6 2866145836Smlaier case AF_INET6: 2867130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2868130613Smlaier pfid_acnt6 < 1) 2869130613Smlaier return (NULL); 2870130613Smlaier PF_POOLMASK(naddr, 2871130613Smlaier &r->rpool.cur->addr.p.dyn-> 2872130613Smlaier pfid_addr6, 2873130613Smlaier &r->rpool.cur->addr.p.dyn-> 2874130613Smlaier pfid_mask6, 2875130613Smlaier saddr, AF_INET6); 2876145836Smlaier break; 2877145836Smlaier#endif /* INET6 */ 2878130613Smlaier } 2879130613Smlaier } else 2880126258Smlaier PF_POOLMASK(naddr, 2881126258Smlaier &r->rpool.cur->addr.v.a.addr, 2882126258Smlaier &r->rpool.cur->addr.v.a.mask, 2883126258Smlaier saddr, pd->af); 2884126258Smlaier break; 2885126258Smlaier case PF_IN: 2886138041Sdhartmei if (r->src.addr.type == PF_ADDR_DYNIFTL) { 2887145836Smlaier switch (pd->af) { 2888145836Smlaier#ifdef INET 2889145836Smlaier case AF_INET: 2890130613Smlaier if (r->src.addr.p.dyn-> 2891130613Smlaier pfid_acnt4 < 1) 2892130613Smlaier return (NULL); 2893130613Smlaier PF_POOLMASK(naddr, 2894130613Smlaier &r->src.addr.p.dyn-> 2895130613Smlaier pfid_addr4, 2896130613Smlaier &r->src.addr.p.dyn-> 2897130613Smlaier pfid_mask4, 2898130613Smlaier daddr, AF_INET); 2899145836Smlaier break; 2900145836Smlaier#endif /* INET */ 2901145836Smlaier#ifdef INET6 2902145836Smlaier case AF_INET6: 2903130613Smlaier if (r->src.addr.p.dyn-> 2904130613Smlaier pfid_acnt6 < 1) 2905130613Smlaier return (NULL); 2906130613Smlaier PF_POOLMASK(naddr, 2907130613Smlaier &r->src.addr.p.dyn-> 2908130613Smlaier pfid_addr6, 2909130613Smlaier &r->src.addr.p.dyn-> 2910130613Smlaier pfid_mask6, 2911130613Smlaier daddr, AF_INET6); 2912145836Smlaier break; 2913145836Smlaier#endif /* INET6 */ 2914130613Smlaier } 2915130613Smlaier } else 2916126258Smlaier PF_POOLMASK(naddr, 2917126258Smlaier &r->src.addr.v.a.addr, 2918126261Smlaier &r->src.addr.v.a.mask, daddr, 2919126258Smlaier pd->af); 2920126258Smlaier break; 2921126258Smlaier } 2922126258Smlaier break; 2923126258Smlaier case PF_RDR: { 2924140518Sdhartmei if (pf_map_addr(pd->af, r, saddr, naddr, NULL, sn)) 2925126258Smlaier return (NULL); 2926149884Smlaier if ((r->rpool.opts & PF_POOL_TYPEMASK) == 2927149884Smlaier PF_POOL_BITMASK) 2928149884Smlaier PF_POOLMASK(naddr, naddr, 2929149884Smlaier &r->rpool.cur->addr.v.a.mask, daddr, 2930149884Smlaier pd->af); 2931126258Smlaier 2932126258Smlaier if (r->rpool.proxy_port[1]) { 2933126258Smlaier u_int32_t tmp_nport; 2934126258Smlaier 2935126258Smlaier tmp_nport = ((ntohs(dport) - 2936126258Smlaier ntohs(r->dst.port[0])) % 2937126258Smlaier (r->rpool.proxy_port[1] - 2938126258Smlaier r->rpool.proxy_port[0] + 1)) + 2939126258Smlaier r->rpool.proxy_port[0]; 2940126258Smlaier 2941126258Smlaier /* wrap around if necessary */ 2942126258Smlaier if (tmp_nport > 65535) 2943126258Smlaier tmp_nport -= 65535; 2944126258Smlaier *nport = htons((u_int16_t)tmp_nport); 2945126258Smlaier } else if (r->rpool.proxy_port[0]) 2946126258Smlaier *nport = htons(r->rpool.proxy_port[0]); 2947126258Smlaier break; 2948126258Smlaier } 2949126258Smlaier default: 2950126258Smlaier return (NULL); 2951126258Smlaier } 2952126258Smlaier } 2953126258Smlaier 2954126258Smlaier return (r); 2955126258Smlaier} 2956126258Smlaier 2957126258Smlaierint 2958135920Smlaier#ifdef __FreeBSD__ 2959171168Smlaierpf_socket_lookup(int direction, struct pf_pdesc *pd, struct inpcb *inp_arg) 2960135920Smlaier#else 2961171168Smlaierpf_socket_lookup(int direction, struct pf_pdesc *pd) 2962135920Smlaier#endif 2963126258Smlaier{ 2964126258Smlaier struct pf_addr *saddr, *daddr; 2965126258Smlaier u_int16_t sport, dport; 2966127145Smlaier#ifdef __FreeBSD__ 2967126261Smlaier struct inpcbinfo *pi; 2968126261Smlaier#else 2969126258Smlaier struct inpcbtable *tb; 2970126261Smlaier#endif 2971126258Smlaier struct inpcb *inp; 2972126258Smlaier 2973171168Smlaier if (pd == NULL) 2974171168Smlaier return (-1); 2975171168Smlaier pd->lookup.uid = UID_MAX; 2976171168Smlaier pd->lookup.gid = GID_MAX; 2977171168Smlaier pd->lookup.pid = NO_PID; /* XXX: revisit */ 2978135920Smlaier#ifdef __FreeBSD__ 2979135920Smlaier if (inp_arg != NULL) { 2980178325Srwatson INP_LOCK_ASSERT(inp_arg); 2981183606Sbz pd->lookup.uid = inp_arg->inp_cred->cr_uid; 2982183606Sbz pd->lookup.gid = inp_arg->inp_cred->cr_groups[0]; 2983183606Sbz return (1); 2984135920Smlaier } 2985135920Smlaier#endif 2986130613Smlaier switch (pd->proto) { 2987126258Smlaier case IPPROTO_TCP: 2988171168Smlaier if (pd->hdr.tcp == NULL) 2989171168Smlaier return (-1); 2990126258Smlaier sport = pd->hdr.tcp->th_sport; 2991126258Smlaier dport = pd->hdr.tcp->th_dport; 2992127145Smlaier#ifdef __FreeBSD__ 2993181803Sbz pi = &V_tcbinfo; 2994126261Smlaier#else 2995126258Smlaier tb = &tcbtable; 2996126261Smlaier#endif 2997126258Smlaier break; 2998126258Smlaier case IPPROTO_UDP: 2999171168Smlaier if (pd->hdr.udp == NULL) 3000171168Smlaier return (-1); 3001126258Smlaier sport = pd->hdr.udp->uh_sport; 3002126258Smlaier dport = pd->hdr.udp->uh_dport; 3003127145Smlaier#ifdef __FreeBSD__ 3004181803Sbz pi = &V_udbinfo; 3005126261Smlaier#else 3006126258Smlaier tb = &udbtable; 3007126261Smlaier#endif 3008126258Smlaier break; 3009126258Smlaier default: 3010171168Smlaier return (-1); 3011126258Smlaier } 3012126258Smlaier if (direction == PF_IN) { 3013126258Smlaier saddr = pd->src; 3014126258Smlaier daddr = pd->dst; 3015126258Smlaier } else { 3016126258Smlaier u_int16_t p; 3017126258Smlaier 3018126258Smlaier p = sport; 3019126258Smlaier sport = dport; 3020126258Smlaier dport = p; 3021126258Smlaier saddr = pd->dst; 3022126258Smlaier daddr = pd->src; 3023126258Smlaier } 3024130613Smlaier switch (pd->af) { 3025145836Smlaier#ifdef INET 3026126258Smlaier case AF_INET: 3027127145Smlaier#ifdef __FreeBSD__ 3028126261Smlaier INP_INFO_RLOCK(pi); /* XXX LOR */ 3029126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, daddr->v4, 3030126261Smlaier dport, 0, NULL); 3031126261Smlaier if (inp == NULL) { 3032126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, 3033126261Smlaier daddr->v4, dport, INPLOOKUP_WILDCARD, NULL); 3034126261Smlaier if(inp == NULL) { 3035126261Smlaier INP_INFO_RUNLOCK(pi); 3036171168Smlaier return (-1); 3037126261Smlaier } 3038126261Smlaier } 3039126261Smlaier#else 3040126258Smlaier inp = in_pcbhashlookup(tb, saddr->v4, sport, daddr->v4, dport); 3041126258Smlaier if (inp == NULL) { 3042130613Smlaier inp = in_pcblookup_listen(tb, daddr->v4, dport, 0); 3043126258Smlaier if (inp == NULL) 3044171168Smlaier return (-1); 3045126258Smlaier } 3046126261Smlaier#endif 3047126258Smlaier break; 3048145836Smlaier#endif /* INET */ 3049126258Smlaier#ifdef INET6 3050126258Smlaier case AF_INET6: 3051127145Smlaier#ifdef __FreeBSD__ 3052126261Smlaier INP_INFO_RLOCK(pi); 3053126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 3054126261Smlaier &daddr->v6, dport, 0, NULL); 3055126261Smlaier if (inp == NULL) { 3056126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 3057126261Smlaier &daddr->v6, dport, INPLOOKUP_WILDCARD, NULL); 3058126261Smlaier if (inp == NULL) { 3059126261Smlaier INP_INFO_RUNLOCK(pi); 3060171168Smlaier return (-1); 3061126261Smlaier } 3062126261Smlaier } 3063126261Smlaier#else 3064126258Smlaier inp = in6_pcbhashlookup(tb, &saddr->v6, sport, &daddr->v6, 3065126258Smlaier dport); 3066126258Smlaier if (inp == NULL) { 3067130613Smlaier inp = in6_pcblookup_listen(tb, &daddr->v6, dport, 0); 3068126258Smlaier if (inp == NULL) 3069171168Smlaier return (-1); 3070126258Smlaier } 3071126261Smlaier#endif 3072126258Smlaier break; 3073126258Smlaier#endif /* INET6 */ 3074126258Smlaier 3075126258Smlaier default: 3076171168Smlaier return (-1); 3077126258Smlaier } 3078127145Smlaier#ifdef __FreeBSD__ 3079183606Sbz pd->lookup.uid = inp->inp_cred->cr_uid; 3080183606Sbz pd->lookup.gid = inp->inp_cred->cr_groups[0]; 3081178325Srwatson INP_INFO_RUNLOCK(pi); 3082126261Smlaier#else 3083171168Smlaier pd->lookup.uid = inp->inp_socket->so_euid; 3084171168Smlaier pd->lookup.gid = inp->inp_socket->so_egid; 3085171168Smlaier pd->lookup.pid = inp->inp_socket->so_cpid; 3086126261Smlaier#endif 3087126258Smlaier return (1); 3088126258Smlaier} 3089126258Smlaier 3090126258Smlaieru_int8_t 3091126258Smlaierpf_get_wscale(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 3092126258Smlaier{ 3093126258Smlaier int hlen; 3094126258Smlaier u_int8_t hdr[60]; 3095126258Smlaier u_int8_t *opt, optlen; 3096126258Smlaier u_int8_t wscale = 0; 3097126258Smlaier 3098126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 3099126258Smlaier if (hlen <= sizeof(struct tcphdr)) 3100126258Smlaier return (0); 3101126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 3102126258Smlaier return (0); 3103126258Smlaier opt = hdr + sizeof(struct tcphdr); 3104126258Smlaier hlen -= sizeof(struct tcphdr); 3105126258Smlaier while (hlen >= 3) { 3106126258Smlaier switch (*opt) { 3107126258Smlaier case TCPOPT_EOL: 3108126258Smlaier case TCPOPT_NOP: 3109126258Smlaier ++opt; 3110126258Smlaier --hlen; 3111126258Smlaier break; 3112126258Smlaier case TCPOPT_WINDOW: 3113126258Smlaier wscale = opt[2]; 3114126258Smlaier if (wscale > TCP_MAX_WINSHIFT) 3115126258Smlaier wscale = TCP_MAX_WINSHIFT; 3116126258Smlaier wscale |= PF_WSCALE_FLAG; 3117130613Smlaier /* FALLTHROUGH */ 3118126258Smlaier default: 3119126258Smlaier optlen = opt[1]; 3120126258Smlaier if (optlen < 2) 3121126258Smlaier optlen = 2; 3122126258Smlaier hlen -= optlen; 3123126258Smlaier opt += optlen; 3124130613Smlaier break; 3125126258Smlaier } 3126126258Smlaier } 3127126258Smlaier return (wscale); 3128126258Smlaier} 3129126258Smlaier 3130126258Smlaieru_int16_t 3131126258Smlaierpf_get_mss(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 3132126258Smlaier{ 3133126258Smlaier int hlen; 3134126258Smlaier u_int8_t hdr[60]; 3135126258Smlaier u_int8_t *opt, optlen; 3136181803Sbz u_int16_t mss = V_tcp_mssdflt; 3137126258Smlaier 3138126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 3139126258Smlaier if (hlen <= sizeof(struct tcphdr)) 3140126258Smlaier return (0); 3141126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 3142126258Smlaier return (0); 3143126258Smlaier opt = hdr + sizeof(struct tcphdr); 3144126258Smlaier hlen -= sizeof(struct tcphdr); 3145126258Smlaier while (hlen >= TCPOLEN_MAXSEG) { 3146126258Smlaier switch (*opt) { 3147126258Smlaier case TCPOPT_EOL: 3148126258Smlaier case TCPOPT_NOP: 3149126258Smlaier ++opt; 3150126258Smlaier --hlen; 3151126258Smlaier break; 3152126258Smlaier case TCPOPT_MAXSEG: 3153126258Smlaier bcopy((caddr_t)(opt + 2), (caddr_t)&mss, 2); 3154145030Sglebius NTOHS(mss); 3155130613Smlaier /* FALLTHROUGH */ 3156126258Smlaier default: 3157126258Smlaier optlen = opt[1]; 3158126258Smlaier if (optlen < 2) 3159126258Smlaier optlen = 2; 3160126258Smlaier hlen -= optlen; 3161126258Smlaier opt += optlen; 3162130613Smlaier break; 3163126258Smlaier } 3164126258Smlaier } 3165126258Smlaier return (mss); 3166126258Smlaier} 3167126258Smlaier 3168126258Smlaieru_int16_t 3169126258Smlaierpf_calc_mss(struct pf_addr *addr, sa_family_t af, u_int16_t offer) 3170126258Smlaier{ 3171126258Smlaier#ifdef INET 3172126258Smlaier struct sockaddr_in *dst; 3173126258Smlaier struct route ro; 3174126258Smlaier#endif /* INET */ 3175126258Smlaier#ifdef INET6 3176126258Smlaier struct sockaddr_in6 *dst6; 3177126258Smlaier struct route_in6 ro6; 3178126258Smlaier#endif /* INET6 */ 3179126258Smlaier struct rtentry *rt = NULL; 3180127629Smlaier int hlen = 0; /* make the compiler happy */ 3181181803Sbz u_int16_t mss = V_tcp_mssdflt; 3182126258Smlaier 3183126258Smlaier switch (af) { 3184126258Smlaier#ifdef INET 3185126258Smlaier case AF_INET: 3186126258Smlaier hlen = sizeof(struct ip); 3187126258Smlaier bzero(&ro, sizeof(ro)); 3188126258Smlaier dst = (struct sockaddr_in *)&ro.ro_dst; 3189126258Smlaier dst->sin_family = AF_INET; 3190126258Smlaier dst->sin_len = sizeof(*dst); 3191126258Smlaier dst->sin_addr = addr->v4; 3192127145Smlaier#ifdef __FreeBSD__ 3193126261Smlaier#ifdef RTF_PRCLONING 3194126261Smlaier rtalloc_ign(&ro, (RTF_CLONING | RTF_PRCLONING)); 3195126261Smlaier#else /* !RTF_PRCLONING */ 3196186119Sqingli in_rtalloc_ign(&ro, 0, 0); 3197126261Smlaier#endif 3198126261Smlaier#else /* ! __FreeBSD__ */ 3199126258Smlaier rtalloc_noclone(&ro, NO_CLONING); 3200126261Smlaier#endif 3201126258Smlaier rt = ro.ro_rt; 3202126258Smlaier break; 3203126258Smlaier#endif /* INET */ 3204126258Smlaier#ifdef INET6 3205126258Smlaier case AF_INET6: 3206126258Smlaier hlen = sizeof(struct ip6_hdr); 3207126258Smlaier bzero(&ro6, sizeof(ro6)); 3208126258Smlaier dst6 = (struct sockaddr_in6 *)&ro6.ro_dst; 3209126258Smlaier dst6->sin6_family = AF_INET6; 3210126258Smlaier dst6->sin6_len = sizeof(*dst6); 3211126258Smlaier dst6->sin6_addr = addr->v6; 3212127145Smlaier#ifdef __FreeBSD__ 3213126261Smlaier#ifdef RTF_PRCLONING 3214126261Smlaier rtalloc_ign((struct route *)&ro6, 3215126261Smlaier (RTF_CLONING | RTF_PRCLONING)); 3216126261Smlaier#else /* !RTF_PRCLONING */ 3217186119Sqingli rtalloc_ign((struct route *)&ro6, 0); 3218126261Smlaier#endif 3219126261Smlaier#else /* ! __FreeBSD__ */ 3220126258Smlaier rtalloc_noclone((struct route *)&ro6, NO_CLONING); 3221126261Smlaier#endif 3222126258Smlaier rt = ro6.ro_rt; 3223126258Smlaier break; 3224126258Smlaier#endif /* INET6 */ 3225126258Smlaier } 3226126258Smlaier 3227126258Smlaier if (rt && rt->rt_ifp) { 3228126258Smlaier mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr); 3229181803Sbz mss = max(V_tcp_mssdflt, mss); 3230126258Smlaier RTFREE(rt); 3231126258Smlaier } 3232126258Smlaier mss = min(mss, offer); 3233126258Smlaier mss = max(mss, 64); /* sanity - at least max opt space */ 3234126258Smlaier return (mss); 3235126258Smlaier} 3236126258Smlaier 3237126258Smlaiervoid 3238126258Smlaierpf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr) 3239126258Smlaier{ 3240126258Smlaier struct pf_rule *r = s->rule.ptr; 3241126258Smlaier 3242130613Smlaier s->rt_kif = NULL; 3243126258Smlaier if (!r->rt || r->rt == PF_FASTROUTE) 3244126258Smlaier return; 3245126258Smlaier switch (s->af) { 3246126258Smlaier#ifdef INET 3247126258Smlaier case AF_INET: 3248130613Smlaier pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL, 3249130613Smlaier &s->nat_src_node); 3250130613Smlaier s->rt_kif = r->rpool.cur->kif; 3251126258Smlaier break; 3252126258Smlaier#endif /* INET */ 3253126258Smlaier#ifdef INET6 3254126258Smlaier case AF_INET6: 3255130613Smlaier pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL, 3256130613Smlaier &s->nat_src_node); 3257130613Smlaier s->rt_kif = r->rpool.cur->kif; 3258126258Smlaier break; 3259126258Smlaier#endif /* INET6 */ 3260126258Smlaier } 3261126258Smlaier} 3262126258Smlaier 3263126258Smlaierint 3264126258Smlaierpf_test_tcp(struct pf_rule **rm, struct pf_state **sm, int direction, 3265130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3266135920Smlaier#ifdef __FreeBSD__ 3267135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3268145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 3269135920Smlaier#else 3270145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3271145836Smlaier struct ifqueue *ifq) 3272135920Smlaier#endif 3273126258Smlaier{ 3274130613Smlaier struct pf_rule *nr = NULL; 3275126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3276126258Smlaier struct tcphdr *th = pd->hdr.tcp; 3277126258Smlaier u_int16_t bport, nport = 0; 3278126258Smlaier sa_family_t af = pd->af; 3279126258Smlaier struct pf_rule *r, *a = NULL; 3280126258Smlaier struct pf_ruleset *ruleset = NULL; 3281130613Smlaier struct pf_src_node *nsn = NULL; 3282126258Smlaier u_short reason; 3283126258Smlaier int rewrite = 0; 3284171168Smlaier int tag = -1, rtableid = -1; 3285181803Sbz u_int16_t mss = V_tcp_mssdflt; 3286145836Smlaier int asd = 0; 3287171168Smlaier int match = 0; 3288126258Smlaier 3289145836Smlaier if (pf_check_congestion(ifq)) { 3290145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3291145836Smlaier return (PF_DROP); 3292145836Smlaier } 3293145836Smlaier 3294171168Smlaier#ifdef __FreeBSD__ 3295171168Smlaier if (inp != NULL) 3296171168Smlaier pd->lookup.done = pf_socket_lookup(direction, pd, inp); 3297171168Smlaier else if (debug_pfugidhack) { 3298171168Smlaier PF_UNLOCK(); 3299171168Smlaier DPFPRINTF(PF_DEBUG_MISC, ("pf: unlocked lookup\n")); 3300171168Smlaier pd->lookup.done = pf_socket_lookup(direction, pd, inp); 3301171168Smlaier PF_LOCK(); 3302171168Smlaier } 3303165631Smlaier#endif 3304165631Smlaier 3305126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3306126258Smlaier 3307126258Smlaier if (direction == PF_OUT) { 3308126258Smlaier bport = nport = th->th_sport; 3309126258Smlaier /* check outgoing packet for BINAT/NAT */ 3310130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3311126258Smlaier saddr, th->th_sport, daddr, th->th_dport, 3312130613Smlaier &pd->naddr, &nport)) != NULL) { 3313130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3314126258Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 3315130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 3316126258Smlaier rewrite++; 3317130613Smlaier if (nr->natpass) 3318126258Smlaier r = NULL; 3319130613Smlaier pd->nat_rule = nr; 3320126258Smlaier } 3321126258Smlaier } else { 3322126258Smlaier bport = nport = th->th_dport; 3323126258Smlaier /* check incoming packet for BINAT/RDR */ 3324130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3325130613Smlaier saddr, th->th_sport, daddr, th->th_dport, 3326130613Smlaier &pd->naddr, &nport)) != NULL) { 3327130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3328126258Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 3329130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 3330126258Smlaier rewrite++; 3331130613Smlaier if (nr->natpass) 3332126258Smlaier r = NULL; 3333130613Smlaier pd->nat_rule = nr; 3334126258Smlaier } 3335126258Smlaier } 3336126258Smlaier 3337126258Smlaier while (r != NULL) { 3338126258Smlaier r->evaluations++; 3339171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 3340126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3341126258Smlaier else if (r->direction && r->direction != direction) 3342126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3343126258Smlaier else if (r->af && r->af != af) 3344126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3345126258Smlaier else if (r->proto && r->proto != IPPROTO_TCP) 3346126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3347171168Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, 3348171168Smlaier r->src.neg, kif)) 3349126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3350126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3351126258Smlaier r->src.port[0], r->src.port[1], th->th_sport)) 3352126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3353171168Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, 3354171168Smlaier r->dst.neg, NULL)) 3355126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3356126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3357126258Smlaier r->dst.port[0], r->dst.port[1], th->th_dport)) 3358126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3359171168Smlaier else if (r->tos && !(r->tos == pd->tos)) 3360126258Smlaier r = TAILQ_NEXT(r, entries); 3361126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3362126258Smlaier r = TAILQ_NEXT(r, entries); 3363126258Smlaier else if ((r->flagset & th->th_flags) != r->flags) 3364126258Smlaier r = TAILQ_NEXT(r, entries); 3365171168Smlaier else if (r->uid.op && (pd->lookup.done || (pd->lookup.done = 3366135920Smlaier#ifdef __FreeBSD__ 3367171168Smlaier pf_socket_lookup(direction, pd, inp), 1)) && 3368135920Smlaier#else 3369171168Smlaier pf_socket_lookup(direction, pd), 1)) && 3370135920Smlaier#endif 3371126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3372171168Smlaier pd->lookup.uid)) 3373126258Smlaier r = TAILQ_NEXT(r, entries); 3374171168Smlaier else if (r->gid.op && (pd->lookup.done || (pd->lookup.done = 3375135920Smlaier#ifdef __FreeBSD__ 3376171168Smlaier pf_socket_lookup(direction, pd, inp), 1)) && 3377135920Smlaier#else 3378171168Smlaier pf_socket_lookup(direction, pd), 1)) && 3379135920Smlaier#endif 3380126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3381171168Smlaier pd->lookup.gid)) 3382126258Smlaier r = TAILQ_NEXT(r, entries); 3383145836Smlaier else if (r->prob && r->prob <= arc4random()) 3384126258Smlaier r = TAILQ_NEXT(r, entries); 3385171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 3386126258Smlaier r = TAILQ_NEXT(r, entries); 3387126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && !pf_osfp_match( 3388126258Smlaier pf_osfp_fingerprint(pd, m, off, th), r->os_fingerprint)) 3389126258Smlaier r = TAILQ_NEXT(r, entries); 3390126258Smlaier else { 3391126258Smlaier if (r->tag) 3392126258Smlaier tag = r->tag; 3393171168Smlaier if (r->rtableid >= 0) 3394171168Smlaier rtableid = r->rtableid; 3395126258Smlaier if (r->anchor == NULL) { 3396171168Smlaier match = 1; 3397126258Smlaier *rm = r; 3398126258Smlaier *am = a; 3399126258Smlaier *rsm = ruleset; 3400126258Smlaier if ((*rm)->quick) 3401126258Smlaier break; 3402126258Smlaier r = TAILQ_NEXT(r, entries); 3403126258Smlaier } else 3404145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3405171168Smlaier PF_RULESET_FILTER, &r, &a, &match); 3406126258Smlaier } 3407171168Smlaier if (r == NULL && pf_step_out_of_anchor(&asd, &ruleset, 3408171168Smlaier PF_RULESET_FILTER, &r, &a, &match)) 3409171168Smlaier break; 3410126258Smlaier } 3411126258Smlaier r = *rm; 3412126258Smlaier a = *am; 3413126258Smlaier ruleset = *rsm; 3414126258Smlaier 3415126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3416126258Smlaier 3417171168Smlaier if (r->log || (nr != NULL && nr->natpass && nr->log)) { 3418126258Smlaier if (rewrite) 3419171168Smlaier#ifdef __FreeBSD__ 3420126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3421171168Smlaier#else 3422171168Smlaier m_copyback(m, off, sizeof(*th), th); 3423171168Smlaier#endif 3424171168Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r->log ? r : nr, 3425171168Smlaier a, ruleset, pd); 3426126258Smlaier } 3427126258Smlaier 3428126258Smlaier if ((r->action == PF_DROP) && 3429126258Smlaier ((r->rule_flag & PFRULE_RETURNRST) || 3430126258Smlaier (r->rule_flag & PFRULE_RETURNICMP) || 3431126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3432126258Smlaier /* undo NAT changes, if they have taken place */ 3433130613Smlaier if (nr != NULL) { 3434130613Smlaier if (direction == PF_OUT) { 3435130613Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 3436130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3437130613Smlaier rewrite++; 3438130613Smlaier } else { 3439130613Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 3440130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3441130613Smlaier rewrite++; 3442130613Smlaier } 3443126258Smlaier } 3444126258Smlaier if (((r->rule_flag & PFRULE_RETURNRST) || 3445126258Smlaier (r->rule_flag & PFRULE_RETURN)) && 3446126258Smlaier !(th->th_flags & TH_RST)) { 3447126258Smlaier u_int32_t ack = ntohl(th->th_seq) + pd->p_len; 3448126258Smlaier 3449126258Smlaier if (th->th_flags & TH_SYN) 3450126258Smlaier ack++; 3451126258Smlaier if (th->th_flags & TH_FIN) 3452126258Smlaier ack++; 3453162238Scsjp#ifdef __FreeBSD__ 3454162238Scsjp pf_send_tcp(m, r, af, pd->dst, 3455162238Scsjp#else 3456126258Smlaier pf_send_tcp(r, af, pd->dst, 3457162238Scsjp#endif 3458126258Smlaier pd->src, th->th_dport, th->th_sport, 3459126258Smlaier ntohl(th->th_ack), ack, TH_RST|TH_ACK, 0, 0, 3460171168Smlaier r->return_ttl, 1, 0, pd->eh, kif->pfik_ifp); 3461126258Smlaier } else if ((af == AF_INET) && r->return_icmp) 3462126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3463126258Smlaier r->return_icmp & 255, af, r); 3464126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3465126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3466126258Smlaier r->return_icmp6 & 255, af, r); 3467126258Smlaier } 3468126258Smlaier 3469126258Smlaier if (r->action == PF_DROP) 3470126258Smlaier return (PF_DROP); 3471126258Smlaier 3472171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, rtableid)) { 3473126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3474126258Smlaier return (PF_DROP); 3475126258Smlaier } 3476126258Smlaier 3477130613Smlaier if (r->keep_state || nr != NULL || 3478126258Smlaier (pd->flags & PFDESC_TCP_NORM)) { 3479126258Smlaier /* create new state */ 3480126258Smlaier u_int16_t len; 3481126258Smlaier struct pf_state *s = NULL; 3482130613Smlaier struct pf_src_node *sn = NULL; 3483126258Smlaier 3484126258Smlaier len = pd->tot_len - off - (th->th_off << 2); 3485130613Smlaier 3486130613Smlaier /* check maximums */ 3487145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3488145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3489145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3490130613Smlaier goto cleanup; 3491145836Smlaier } 3492171168Smlaier /* src node for filter rule */ 3493130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3494130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3495145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3496145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3497130613Smlaier goto cleanup; 3498145836Smlaier } 3499130613Smlaier /* src node for translation rule */ 3500130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3501130613Smlaier ((direction == PF_OUT && 3502130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3503145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3504145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3505130613Smlaier goto cleanup; 3506145836Smlaier } 3507130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3508126258Smlaier if (s == NULL) { 3509145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3510130613Smlaiercleanup: 3511130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3512130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3513130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3514130613Smlaier pf_status.src_nodes--; 3515130613Smlaier pool_put(&pf_src_tree_pl, sn); 3516130613Smlaier } 3517130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3518130613Smlaier nsn->expire == 0) { 3519130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3520130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3521130613Smlaier pf_status.src_nodes--; 3522130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3523130613Smlaier } 3524126258Smlaier return (PF_DROP); 3525126258Smlaier } 3526126258Smlaier bzero(s, sizeof(*s)); 3527126258Smlaier s->rule.ptr = r; 3528130613Smlaier s->nat_rule.ptr = nr; 3529126258Smlaier s->anchor.ptr = a; 3530145836Smlaier STATE_INC_COUNTERS(s); 3531126258Smlaier s->allow_opts = r->allow_opts; 3532171168Smlaier s->log = r->log & PF_LOG_ALL; 3533171168Smlaier if (nr != NULL) 3534171168Smlaier s->log |= nr->log & PF_LOG_ALL; 3535126258Smlaier s->proto = IPPROTO_TCP; 3536126258Smlaier s->direction = direction; 3537126258Smlaier s->af = af; 3538126258Smlaier if (direction == PF_OUT) { 3539126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3540126258Smlaier s->gwy.port = th->th_sport; /* sport */ 3541126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3542126258Smlaier s->ext.port = th->th_dport; 3543130613Smlaier if (nr != NULL) { 3544130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3545126258Smlaier s->lan.port = bport; 3546126258Smlaier } else { 3547126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3548126258Smlaier s->lan.port = s->gwy.port; 3549126258Smlaier } 3550126258Smlaier } else { 3551126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3552126258Smlaier s->lan.port = th->th_dport; 3553126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3554126258Smlaier s->ext.port = th->th_sport; 3555130613Smlaier if (nr != NULL) { 3556130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3557126258Smlaier s->gwy.port = bport; 3558126258Smlaier } else { 3559126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3560126258Smlaier s->gwy.port = s->lan.port; 3561126258Smlaier } 3562126258Smlaier } 3563126258Smlaier 3564126258Smlaier s->src.seqlo = ntohl(th->th_seq); 3565126258Smlaier s->src.seqhi = s->src.seqlo + len + 1; 3566126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3567126258Smlaier r->keep_state == PF_STATE_MODULATE) { 3568126258Smlaier /* Generate sequence number modulator */ 3569171168Smlaier#ifdef __FreeBSD__ 3570171168Smlaier while ((s->src.seqdiff = 3571171168Smlaier pf_new_isn(s) - s->src.seqlo) == 0) 3572171168Smlaier ; 3573171168Smlaier#else 3574171168Smlaier while ((s->src.seqdiff = 3575171168Smlaier tcp_rndiss_next() - s->src.seqlo) == 0) 3576126258Smlaier ; 3577171168Smlaier#endif 3578126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, 3579126258Smlaier htonl(s->src.seqlo + s->src.seqdiff), 0); 3580126258Smlaier rewrite = 1; 3581126258Smlaier } else 3582126258Smlaier s->src.seqdiff = 0; 3583126258Smlaier if (th->th_flags & TH_SYN) { 3584126258Smlaier s->src.seqhi++; 3585126258Smlaier s->src.wscale = pf_get_wscale(m, off, th->th_off, af); 3586126258Smlaier } 3587126258Smlaier s->src.max_win = MAX(ntohs(th->th_win), 1); 3588126258Smlaier if (s->src.wscale & PF_WSCALE_MASK) { 3589126258Smlaier /* Remove scale factor from initial window */ 3590126258Smlaier int win = s->src.max_win; 3591126258Smlaier win += 1 << (s->src.wscale & PF_WSCALE_MASK); 3592126258Smlaier s->src.max_win = (win - 1) >> 3593126258Smlaier (s->src.wscale & PF_WSCALE_MASK); 3594126258Smlaier } 3595126258Smlaier if (th->th_flags & TH_FIN) 3596126258Smlaier s->src.seqhi++; 3597126258Smlaier s->dst.seqhi = 1; 3598126258Smlaier s->dst.max_win = 1; 3599126258Smlaier s->src.state = TCPS_SYN_SENT; 3600126258Smlaier s->dst.state = TCPS_CLOSED; 3601126261Smlaier s->creation = time_second; 3602126261Smlaier s->expire = time_second; 3603126258Smlaier s->timeout = PFTM_TCP_FIRST_PACKET; 3604126258Smlaier pf_set_rt_ifp(s, saddr); 3605130613Smlaier if (sn != NULL) { 3606130613Smlaier s->src_node = sn; 3607130613Smlaier s->src_node->states++; 3608130613Smlaier } 3609130613Smlaier if (nsn != NULL) { 3610130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3611130613Smlaier s->nat_src_node = nsn; 3612130613Smlaier s->nat_src_node->states++; 3613130613Smlaier } 3614126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && pf_normalize_tcp_init(m, 3615126258Smlaier off, pd, th, &s->src, &s->dst)) { 3616126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3617130613Smlaier pf_src_tree_remove_state(s); 3618145836Smlaier STATE_DEC_COUNTERS(s); 3619126258Smlaier pool_put(&pf_state_pl, s); 3620126258Smlaier return (PF_DROP); 3621126258Smlaier } 3622126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && s->src.scrub && 3623145836Smlaier pf_normalize_tcp_stateful(m, off, pd, &reason, th, s, 3624145836Smlaier &s->src, &s->dst, &rewrite)) { 3625145836Smlaier /* This really shouldn't happen!!! */ 3626145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 3627145836Smlaier ("pf_normalize_tcp_stateful failed on first pkt")); 3628126258Smlaier pf_normalize_tcp_cleanup(s); 3629130613Smlaier pf_src_tree_remove_state(s); 3630145836Smlaier STATE_DEC_COUNTERS(s); 3631126258Smlaier pool_put(&pf_state_pl, s); 3632126258Smlaier return (PF_DROP); 3633126258Smlaier } 3634130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3635126258Smlaier pf_normalize_tcp_cleanup(s); 3636145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3637130613Smlaier pf_src_tree_remove_state(s); 3638145836Smlaier STATE_DEC_COUNTERS(s); 3639126258Smlaier pool_put(&pf_state_pl, s); 3640126258Smlaier return (PF_DROP); 3641126258Smlaier } else 3642126258Smlaier *sm = s; 3643145836Smlaier if (tag > 0) { 3644145836Smlaier pf_tag_ref(tag); 3645145836Smlaier s->tag = tag; 3646145836Smlaier } 3647126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3648126258Smlaier r->keep_state == PF_STATE_SYNPROXY) { 3649126258Smlaier s->src.state = PF_TCPS_PROXY_SRC; 3650130613Smlaier if (nr != NULL) { 3651130613Smlaier if (direction == PF_OUT) { 3652130613Smlaier pf_change_ap(saddr, &th->th_sport, 3653130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3654130613Smlaier bport, 0, af); 3655130613Smlaier } else { 3656130613Smlaier pf_change_ap(daddr, &th->th_dport, 3657130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3658130613Smlaier bport, 0, af); 3659130613Smlaier } 3660130613Smlaier } 3661145836Smlaier s->src.seqhi = htonl(arc4random()); 3662126258Smlaier /* Find mss option */ 3663126258Smlaier mss = pf_get_mss(m, off, th->th_off, af); 3664126258Smlaier mss = pf_calc_mss(saddr, af, mss); 3665126258Smlaier mss = pf_calc_mss(daddr, af, mss); 3666126258Smlaier s->src.mss = mss; 3667162238Scsjp#ifdef __FreeBSD__ 3668162238Scsjp pf_send_tcp(NULL, r, af, daddr, saddr, th->th_dport, 3669162238Scsjp#else 3670126258Smlaier pf_send_tcp(r, af, daddr, saddr, th->th_dport, 3671162238Scsjp#endif 3672130613Smlaier th->th_sport, s->src.seqhi, ntohl(th->th_seq) + 1, 3673171168Smlaier TH_SYN|TH_ACK, 0, s->src.mss, 0, 1, 0, NULL, NULL); 3674145836Smlaier REASON_SET(&reason, PFRES_SYNPROXY); 3675126258Smlaier return (PF_SYNPROXY_DROP); 3676126258Smlaier } 3677126258Smlaier } 3678126258Smlaier 3679126258Smlaier /* copy back packet headers if we performed NAT operations */ 3680126258Smlaier if (rewrite) 3681126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3682126258Smlaier 3683126258Smlaier return (PF_PASS); 3684126258Smlaier} 3685126258Smlaier 3686126258Smlaierint 3687126258Smlaierpf_test_udp(struct pf_rule **rm, struct pf_state **sm, int direction, 3688130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3689135920Smlaier#ifdef __FreeBSD__ 3690135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3691145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 3692135920Smlaier#else 3693145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3694145836Smlaier struct ifqueue *ifq) 3695135920Smlaier#endif 3696126258Smlaier{ 3697130613Smlaier struct pf_rule *nr = NULL; 3698126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3699126258Smlaier struct udphdr *uh = pd->hdr.udp; 3700126258Smlaier u_int16_t bport, nport = 0; 3701126258Smlaier sa_family_t af = pd->af; 3702126258Smlaier struct pf_rule *r, *a = NULL; 3703126258Smlaier struct pf_ruleset *ruleset = NULL; 3704130613Smlaier struct pf_src_node *nsn = NULL; 3705126258Smlaier u_short reason; 3706126258Smlaier int rewrite = 0; 3707171168Smlaier int tag = -1, rtableid = -1; 3708145836Smlaier int asd = 0; 3709171168Smlaier int match = 0; 3710126258Smlaier 3711145836Smlaier if (pf_check_congestion(ifq)) { 3712145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3713145836Smlaier return (PF_DROP); 3714145836Smlaier } 3715145836Smlaier 3716171168Smlaier#ifdef __FreeBSD__ 3717171168Smlaier if (inp != NULL) 3718171168Smlaier pd->lookup.done = pf_socket_lookup(direction, pd, inp); 3719171168Smlaier else if (debug_pfugidhack) { 3720171168Smlaier PF_UNLOCK(); 3721171168Smlaier DPFPRINTF(PF_DEBUG_MISC, ("pf: unlocked lookup\n")); 3722171168Smlaier pd->lookup.done = pf_socket_lookup(direction, pd, inp); 3723171168Smlaier PF_LOCK(); 3724171168Smlaier } 3725165631Smlaier#endif 3726165631Smlaier 3727126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3728126258Smlaier 3729126258Smlaier if (direction == PF_OUT) { 3730126258Smlaier bport = nport = uh->uh_sport; 3731126258Smlaier /* check outgoing packet for BINAT/NAT */ 3732130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3733126258Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, 3734130613Smlaier &pd->naddr, &nport)) != NULL) { 3735130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3736126258Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3737130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3738126258Smlaier rewrite++; 3739130613Smlaier if (nr->natpass) 3740126258Smlaier r = NULL; 3741130613Smlaier pd->nat_rule = nr; 3742126258Smlaier } 3743126258Smlaier } else { 3744126258Smlaier bport = nport = uh->uh_dport; 3745126258Smlaier /* check incoming packet for BINAT/RDR */ 3746130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3747130613Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, &pd->naddr, 3748130613Smlaier &nport)) != NULL) { 3749130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3750126258Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3751130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3752126258Smlaier rewrite++; 3753130613Smlaier if (nr->natpass) 3754126258Smlaier r = NULL; 3755130613Smlaier pd->nat_rule = nr; 3756126258Smlaier } 3757126258Smlaier } 3758126258Smlaier 3759126258Smlaier while (r != NULL) { 3760126258Smlaier r->evaluations++; 3761171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 3762126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3763126258Smlaier else if (r->direction && r->direction != direction) 3764126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3765126258Smlaier else if (r->af && r->af != af) 3766126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3767126258Smlaier else if (r->proto && r->proto != IPPROTO_UDP) 3768126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3769171168Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, 3770171168Smlaier r->src.neg, kif)) 3771126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3772126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3773126258Smlaier r->src.port[0], r->src.port[1], uh->uh_sport)) 3774126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3775171168Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, 3776171168Smlaier r->dst.neg, NULL)) 3777126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3778126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3779126258Smlaier r->dst.port[0], r->dst.port[1], uh->uh_dport)) 3780126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3781171168Smlaier else if (r->tos && !(r->tos == pd->tos)) 3782126258Smlaier r = TAILQ_NEXT(r, entries); 3783126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3784126258Smlaier r = TAILQ_NEXT(r, entries); 3785171168Smlaier else if (r->uid.op && (pd->lookup.done || (pd->lookup.done = 3786135920Smlaier#ifdef __FreeBSD__ 3787171168Smlaier pf_socket_lookup(direction, pd, inp), 1)) && 3788135920Smlaier#else 3789171168Smlaier pf_socket_lookup(direction, pd), 1)) && 3790135920Smlaier#endif 3791126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3792171168Smlaier pd->lookup.uid)) 3793126258Smlaier r = TAILQ_NEXT(r, entries); 3794171168Smlaier else if (r->gid.op && (pd->lookup.done || (pd->lookup.done = 3795135920Smlaier#ifdef __FreeBSD__ 3796171168Smlaier pf_socket_lookup(direction, pd, inp), 1)) && 3797135920Smlaier#else 3798171168Smlaier pf_socket_lookup(direction, pd), 1)) && 3799135920Smlaier#endif 3800126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3801171168Smlaier pd->lookup.gid)) 3802126258Smlaier r = TAILQ_NEXT(r, entries); 3803145836Smlaier else if (r->prob && r->prob <= arc4random()) 3804126258Smlaier r = TAILQ_NEXT(r, entries); 3805171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 3806126258Smlaier r = TAILQ_NEXT(r, entries); 3807126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3808126258Smlaier r = TAILQ_NEXT(r, entries); 3809126258Smlaier else { 3810126258Smlaier if (r->tag) 3811126258Smlaier tag = r->tag; 3812171168Smlaier if (r->rtableid >= 0) 3813171168Smlaier rtableid = r->rtableid; 3814126258Smlaier if (r->anchor == NULL) { 3815171168Smlaier match = 1; 3816126258Smlaier *rm = r; 3817126258Smlaier *am = a; 3818126258Smlaier *rsm = ruleset; 3819126258Smlaier if ((*rm)->quick) 3820126258Smlaier break; 3821126258Smlaier r = TAILQ_NEXT(r, entries); 3822126258Smlaier } else 3823145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3824171168Smlaier PF_RULESET_FILTER, &r, &a, &match); 3825126258Smlaier } 3826171168Smlaier if (r == NULL && pf_step_out_of_anchor(&asd, &ruleset, 3827171168Smlaier PF_RULESET_FILTER, &r, &a, &match)) 3828171168Smlaier break; 3829126258Smlaier } 3830126258Smlaier r = *rm; 3831126258Smlaier a = *am; 3832126258Smlaier ruleset = *rsm; 3833126258Smlaier 3834126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3835126258Smlaier 3836171168Smlaier if (r->log || (nr != NULL && nr->natpass && nr->log)) { 3837126258Smlaier if (rewrite) 3838171168Smlaier#ifdef __FreeBSD__ 3839126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3840171168Smlaier#else 3841171168Smlaier m_copyback(m, off, sizeof(*uh), uh); 3842171168Smlaier#endif 3843171168Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r->log ? r : nr, 3844171168Smlaier a, ruleset, pd); 3845126258Smlaier } 3846126258Smlaier 3847126258Smlaier if ((r->action == PF_DROP) && 3848126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 3849126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3850126258Smlaier /* undo NAT changes, if they have taken place */ 3851130613Smlaier if (nr != NULL) { 3852130613Smlaier if (direction == PF_OUT) { 3853130613Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3854130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3855130613Smlaier rewrite++; 3856130613Smlaier } else { 3857130613Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3858130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3859130613Smlaier rewrite++; 3860130613Smlaier } 3861126258Smlaier } 3862126258Smlaier if ((af == AF_INET) && r->return_icmp) 3863126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3864126258Smlaier r->return_icmp & 255, af, r); 3865126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3866126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3867126258Smlaier r->return_icmp6 & 255, af, r); 3868126258Smlaier } 3869126258Smlaier 3870126258Smlaier if (r->action == PF_DROP) 3871126258Smlaier return (PF_DROP); 3872126258Smlaier 3873171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, rtableid)) { 3874126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3875126258Smlaier return (PF_DROP); 3876126258Smlaier } 3877126258Smlaier 3878130613Smlaier if (r->keep_state || nr != NULL) { 3879126258Smlaier /* create new state */ 3880126258Smlaier struct pf_state *s = NULL; 3881130613Smlaier struct pf_src_node *sn = NULL; 3882126258Smlaier 3883130613Smlaier /* check maximums */ 3884145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3885145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3886145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3887130613Smlaier goto cleanup; 3888145836Smlaier } 3889171168Smlaier /* src node for filter rule */ 3890130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3891130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3892145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3893145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3894130613Smlaier goto cleanup; 3895145836Smlaier } 3896130613Smlaier /* src node for translation rule */ 3897130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3898130613Smlaier ((direction == PF_OUT && 3899130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3900145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3901145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3902130613Smlaier goto cleanup; 3903145836Smlaier } 3904130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3905126258Smlaier if (s == NULL) { 3906145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3907130613Smlaiercleanup: 3908130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3909130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3910130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3911130613Smlaier pf_status.src_nodes--; 3912130613Smlaier pool_put(&pf_src_tree_pl, sn); 3913130613Smlaier } 3914130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3915130613Smlaier nsn->expire == 0) { 3916130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3917130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3918130613Smlaier pf_status.src_nodes--; 3919130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3920130613Smlaier } 3921126258Smlaier return (PF_DROP); 3922126258Smlaier } 3923126258Smlaier bzero(s, sizeof(*s)); 3924126258Smlaier s->rule.ptr = r; 3925130613Smlaier s->nat_rule.ptr = nr; 3926126258Smlaier s->anchor.ptr = a; 3927145836Smlaier STATE_INC_COUNTERS(s); 3928126258Smlaier s->allow_opts = r->allow_opts; 3929171168Smlaier s->log = r->log & PF_LOG_ALL; 3930171168Smlaier if (nr != NULL) 3931171168Smlaier s->log |= nr->log & PF_LOG_ALL; 3932126258Smlaier s->proto = IPPROTO_UDP; 3933126258Smlaier s->direction = direction; 3934126258Smlaier s->af = af; 3935126258Smlaier if (direction == PF_OUT) { 3936126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3937126258Smlaier s->gwy.port = uh->uh_sport; 3938126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3939126258Smlaier s->ext.port = uh->uh_dport; 3940130613Smlaier if (nr != NULL) { 3941130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3942126258Smlaier s->lan.port = bport; 3943126258Smlaier } else { 3944126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3945126258Smlaier s->lan.port = s->gwy.port; 3946126258Smlaier } 3947126258Smlaier } else { 3948126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3949126258Smlaier s->lan.port = uh->uh_dport; 3950126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3951126258Smlaier s->ext.port = uh->uh_sport; 3952130613Smlaier if (nr != NULL) { 3953130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3954126258Smlaier s->gwy.port = bport; 3955126258Smlaier } else { 3956126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3957126258Smlaier s->gwy.port = s->lan.port; 3958126258Smlaier } 3959126258Smlaier } 3960126258Smlaier s->src.state = PFUDPS_SINGLE; 3961126258Smlaier s->dst.state = PFUDPS_NO_TRAFFIC; 3962126261Smlaier s->creation = time_second; 3963126261Smlaier s->expire = time_second; 3964126258Smlaier s->timeout = PFTM_UDP_FIRST_PACKET; 3965126258Smlaier pf_set_rt_ifp(s, saddr); 3966130613Smlaier if (sn != NULL) { 3967130613Smlaier s->src_node = sn; 3968130613Smlaier s->src_node->states++; 3969130613Smlaier } 3970130613Smlaier if (nsn != NULL) { 3971130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3972130613Smlaier s->nat_src_node = nsn; 3973130613Smlaier s->nat_src_node->states++; 3974130613Smlaier } 3975130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3976145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3977130613Smlaier pf_src_tree_remove_state(s); 3978145836Smlaier STATE_DEC_COUNTERS(s); 3979126258Smlaier pool_put(&pf_state_pl, s); 3980126258Smlaier return (PF_DROP); 3981126258Smlaier } else 3982126258Smlaier *sm = s; 3983145836Smlaier if (tag > 0) { 3984145836Smlaier pf_tag_ref(tag); 3985145836Smlaier s->tag = tag; 3986145836Smlaier } 3987126258Smlaier } 3988126258Smlaier 3989126258Smlaier /* copy back packet headers if we performed NAT operations */ 3990126258Smlaier if (rewrite) 3991126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3992126258Smlaier 3993126258Smlaier return (PF_PASS); 3994126258Smlaier} 3995126258Smlaier 3996126258Smlaierint 3997126258Smlaierpf_test_icmp(struct pf_rule **rm, struct pf_state **sm, int direction, 3998130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3999145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 4000145836Smlaier struct ifqueue *ifq) 4001126258Smlaier{ 4002130613Smlaier struct pf_rule *nr = NULL; 4003126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4004126258Smlaier struct pf_rule *r, *a = NULL; 4005126258Smlaier struct pf_ruleset *ruleset = NULL; 4006130613Smlaier struct pf_src_node *nsn = NULL; 4007126258Smlaier u_short reason; 4008149893Smlaier u_int16_t icmpid = 0, bport, nport = 0; 4009126258Smlaier sa_family_t af = pd->af; 4010127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 4011127629Smlaier u_int8_t icmpcode = 0; /* make the compiler happy */ 4012126258Smlaier int state_icmp = 0; 4013171168Smlaier int tag = -1, rtableid = -1; 4014126258Smlaier#ifdef INET6 4015126258Smlaier int rewrite = 0; 4016126258Smlaier#endif /* INET6 */ 4017145836Smlaier int asd = 0; 4018171168Smlaier int match = 0; 4019126258Smlaier 4020145836Smlaier if (pf_check_congestion(ifq)) { 4021145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 4022145836Smlaier return (PF_DROP); 4023145836Smlaier } 4024145836Smlaier 4025126258Smlaier switch (pd->proto) { 4026126258Smlaier#ifdef INET 4027126258Smlaier case IPPROTO_ICMP: 4028126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 4029126258Smlaier icmpcode = pd->hdr.icmp->icmp_code; 4030126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 4031126258Smlaier 4032126258Smlaier if (icmptype == ICMP_UNREACH || 4033126258Smlaier icmptype == ICMP_SOURCEQUENCH || 4034126258Smlaier icmptype == ICMP_REDIRECT || 4035126258Smlaier icmptype == ICMP_TIMXCEED || 4036126258Smlaier icmptype == ICMP_PARAMPROB) 4037126258Smlaier state_icmp++; 4038126258Smlaier break; 4039126258Smlaier#endif /* INET */ 4040126258Smlaier#ifdef INET6 4041126258Smlaier case IPPROTO_ICMPV6: 4042126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 4043126258Smlaier icmpcode = pd->hdr.icmp6->icmp6_code; 4044126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 4045126258Smlaier 4046126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 4047126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 4048126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 4049126258Smlaier icmptype == ICMP6_PARAM_PROB) 4050126258Smlaier state_icmp++; 4051126258Smlaier break; 4052126258Smlaier#endif /* INET6 */ 4053126258Smlaier } 4054126258Smlaier 4055126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4056126258Smlaier 4057126258Smlaier if (direction == PF_OUT) { 4058149884Smlaier bport = nport = icmpid; 4059126258Smlaier /* check outgoing packet for BINAT/NAT */ 4060130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 4061149884Smlaier saddr, icmpid, daddr, icmpid, &pd->naddr, &nport)) != 4062149884Smlaier NULL) { 4063130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 4064126258Smlaier switch (af) { 4065126258Smlaier#ifdef INET 4066126258Smlaier case AF_INET: 4067126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 4068130613Smlaier pd->naddr.v4.s_addr, 0); 4069149884Smlaier pd->hdr.icmp->icmp_cksum = pf_cksum_fixup( 4070149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, nport, 0); 4071149884Smlaier pd->hdr.icmp->icmp_id = nport; 4072149893Smlaier m_copyback(m, off, ICMP_MINLEN, 4073149893Smlaier (caddr_t)pd->hdr.icmp); 4074126258Smlaier break; 4075126258Smlaier#endif /* INET */ 4076126258Smlaier#ifdef INET6 4077126258Smlaier case AF_INET6: 4078126258Smlaier pf_change_a6(saddr, &pd->hdr.icmp6->icmp6_cksum, 4079130613Smlaier &pd->naddr, 0); 4080126258Smlaier rewrite++; 4081126258Smlaier break; 4082126258Smlaier#endif /* INET6 */ 4083126258Smlaier } 4084130613Smlaier if (nr->natpass) 4085126258Smlaier r = NULL; 4086130613Smlaier pd->nat_rule = nr; 4087126258Smlaier } 4088126258Smlaier } else { 4089149884Smlaier bport = nport = icmpid; 4090126258Smlaier /* check incoming packet for BINAT/RDR */ 4091130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 4092149884Smlaier saddr, icmpid, daddr, icmpid, &pd->naddr, &nport)) != 4093149884Smlaier NULL) { 4094130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 4095126258Smlaier switch (af) { 4096126258Smlaier#ifdef INET 4097126258Smlaier case AF_INET: 4098126258Smlaier pf_change_a(&daddr->v4.s_addr, 4099130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 4100126258Smlaier break; 4101126258Smlaier#endif /* INET */ 4102126258Smlaier#ifdef INET6 4103126258Smlaier case AF_INET6: 4104126258Smlaier pf_change_a6(daddr, &pd->hdr.icmp6->icmp6_cksum, 4105130613Smlaier &pd->naddr, 0); 4106126258Smlaier rewrite++; 4107126258Smlaier break; 4108126258Smlaier#endif /* INET6 */ 4109126258Smlaier } 4110130613Smlaier if (nr->natpass) 4111126258Smlaier r = NULL; 4112130613Smlaier pd->nat_rule = nr; 4113126258Smlaier } 4114126258Smlaier } 4115126258Smlaier 4116126258Smlaier while (r != NULL) { 4117126258Smlaier r->evaluations++; 4118171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 4119126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4120126258Smlaier else if (r->direction && r->direction != direction) 4121126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4122126258Smlaier else if (r->af && r->af != af) 4123126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4124126258Smlaier else if (r->proto && r->proto != pd->proto) 4125126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4126171168Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, 4127171168Smlaier r->src.neg, kif)) 4128126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4129171168Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, 4130171168Smlaier r->dst.neg, NULL)) 4131126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4132126258Smlaier else if (r->type && r->type != icmptype + 1) 4133126258Smlaier r = TAILQ_NEXT(r, entries); 4134126258Smlaier else if (r->code && r->code != icmpcode + 1) 4135126258Smlaier r = TAILQ_NEXT(r, entries); 4136171168Smlaier else if (r->tos && !(r->tos == pd->tos)) 4137126258Smlaier r = TAILQ_NEXT(r, entries); 4138126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 4139126258Smlaier r = TAILQ_NEXT(r, entries); 4140145836Smlaier else if (r->prob && r->prob <= arc4random()) 4141126258Smlaier r = TAILQ_NEXT(r, entries); 4142171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 4143126258Smlaier r = TAILQ_NEXT(r, entries); 4144126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 4145126258Smlaier r = TAILQ_NEXT(r, entries); 4146126258Smlaier else { 4147126258Smlaier if (r->tag) 4148126258Smlaier tag = r->tag; 4149171168Smlaier if (r->rtableid >= 0) 4150171168Smlaier rtableid = r->rtableid; 4151126258Smlaier if (r->anchor == NULL) { 4152171168Smlaier match = 1; 4153126258Smlaier *rm = r; 4154126258Smlaier *am = a; 4155126258Smlaier *rsm = ruleset; 4156126258Smlaier if ((*rm)->quick) 4157126258Smlaier break; 4158126258Smlaier r = TAILQ_NEXT(r, entries); 4159126258Smlaier } else 4160145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4161171168Smlaier PF_RULESET_FILTER, &r, &a, &match); 4162126258Smlaier } 4163171168Smlaier if (r == NULL && pf_step_out_of_anchor(&asd, &ruleset, 4164171168Smlaier PF_RULESET_FILTER, &r, &a, &match)) 4165171168Smlaier break; 4166126258Smlaier } 4167126258Smlaier r = *rm; 4168126258Smlaier a = *am; 4169126258Smlaier ruleset = *rsm; 4170126258Smlaier 4171126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4172126258Smlaier 4173171168Smlaier if (r->log || (nr != NULL && nr->natpass && nr->log)) { 4174126258Smlaier#ifdef INET6 4175126258Smlaier if (rewrite) 4176126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 4177126261Smlaier (caddr_t)pd->hdr.icmp6); 4178126258Smlaier#endif /* INET6 */ 4179171168Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r->log ? r : nr, 4180171168Smlaier a, ruleset, pd); 4181126258Smlaier } 4182126258Smlaier 4183126258Smlaier if (r->action != PF_PASS) 4184126258Smlaier return (PF_DROP); 4185126258Smlaier 4186171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, rtableid)) { 4187126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4188126258Smlaier return (PF_DROP); 4189126258Smlaier } 4190126258Smlaier 4191130613Smlaier if (!state_icmp && (r->keep_state || nr != NULL)) { 4192126258Smlaier /* create new state */ 4193126258Smlaier struct pf_state *s = NULL; 4194130613Smlaier struct pf_src_node *sn = NULL; 4195126258Smlaier 4196130613Smlaier /* check maximums */ 4197145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 4198145836Smlaier pf_status.lcounters[LCNT_STATES]++; 4199145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 4200130613Smlaier goto cleanup; 4201145836Smlaier } 4202171168Smlaier /* src node for filter rule */ 4203130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 4204130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 4205145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 4206145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4207130613Smlaier goto cleanup; 4208145836Smlaier } 4209130613Smlaier /* src node for translation rule */ 4210130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 4211130613Smlaier ((direction == PF_OUT && 4212130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 4213145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 4214145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4215130613Smlaier goto cleanup; 4216145836Smlaier } 4217130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 4218126258Smlaier if (s == NULL) { 4219145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 4220130613Smlaiercleanup: 4221130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 4222130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 4223130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4224130613Smlaier pf_status.src_nodes--; 4225130613Smlaier pool_put(&pf_src_tree_pl, sn); 4226130613Smlaier } 4227130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 4228130613Smlaier nsn->expire == 0) { 4229130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 4230130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4231130613Smlaier pf_status.src_nodes--; 4232130613Smlaier pool_put(&pf_src_tree_pl, nsn); 4233130613Smlaier } 4234126258Smlaier return (PF_DROP); 4235126258Smlaier } 4236126258Smlaier bzero(s, sizeof(*s)); 4237126258Smlaier s->rule.ptr = r; 4238130613Smlaier s->nat_rule.ptr = nr; 4239126258Smlaier s->anchor.ptr = a; 4240145836Smlaier STATE_INC_COUNTERS(s); 4241126258Smlaier s->allow_opts = r->allow_opts; 4242171168Smlaier s->log = r->log & PF_LOG_ALL; 4243171168Smlaier if (nr != NULL) 4244171168Smlaier s->log |= nr->log & PF_LOG_ALL; 4245126258Smlaier s->proto = pd->proto; 4246126258Smlaier s->direction = direction; 4247126258Smlaier s->af = af; 4248126258Smlaier if (direction == PF_OUT) { 4249126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 4250149884Smlaier s->gwy.port = nport; 4251126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 4252149884Smlaier s->ext.port = 0; 4253149884Smlaier if (nr != NULL) { 4254130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 4255149884Smlaier s->lan.port = bport; 4256149884Smlaier } else { 4257126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 4258149884Smlaier s->lan.port = s->gwy.port; 4259149884Smlaier } 4260126258Smlaier } else { 4261126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 4262149884Smlaier s->lan.port = nport; 4263126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 4264149884Smlaier s->ext.port = 0; 4265149884Smlaier if (nr != NULL) { 4266130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 4267149884Smlaier s->gwy.port = bport; 4268149884Smlaier } else { 4269126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 4270149884Smlaier s->gwy.port = s->lan.port; 4271149884Smlaier } 4272126258Smlaier } 4273126261Smlaier s->creation = time_second; 4274126261Smlaier s->expire = time_second; 4275126258Smlaier s->timeout = PFTM_ICMP_FIRST_PACKET; 4276126258Smlaier pf_set_rt_ifp(s, saddr); 4277130613Smlaier if (sn != NULL) { 4278130613Smlaier s->src_node = sn; 4279130613Smlaier s->src_node->states++; 4280130613Smlaier } 4281130613Smlaier if (nsn != NULL) { 4282130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 4283130613Smlaier s->nat_src_node = nsn; 4284130613Smlaier s->nat_src_node->states++; 4285130613Smlaier } 4286130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 4287145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 4288130613Smlaier pf_src_tree_remove_state(s); 4289145836Smlaier STATE_DEC_COUNTERS(s); 4290126258Smlaier pool_put(&pf_state_pl, s); 4291126258Smlaier return (PF_DROP); 4292126258Smlaier } else 4293126258Smlaier *sm = s; 4294145836Smlaier if (tag > 0) { 4295145836Smlaier pf_tag_ref(tag); 4296145836Smlaier s->tag = tag; 4297145836Smlaier } 4298126258Smlaier } 4299126258Smlaier 4300126258Smlaier#ifdef INET6 4301126258Smlaier /* copy back packet headers if we performed IPv6 NAT operations */ 4302126258Smlaier if (rewrite) 4303126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 4304126261Smlaier (caddr_t)pd->hdr.icmp6); 4305126258Smlaier#endif /* INET6 */ 4306126258Smlaier 4307126258Smlaier return (PF_PASS); 4308126258Smlaier} 4309126258Smlaier 4310126258Smlaierint 4311126258Smlaierpf_test_other(struct pf_rule **rm, struct pf_state **sm, int direction, 4312130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 4313145836Smlaier struct pf_rule **am, struct pf_ruleset **rsm, struct ifqueue *ifq) 4314126258Smlaier{ 4315130613Smlaier struct pf_rule *nr = NULL; 4316126258Smlaier struct pf_rule *r, *a = NULL; 4317126258Smlaier struct pf_ruleset *ruleset = NULL; 4318130613Smlaier struct pf_src_node *nsn = NULL; 4319126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4320126258Smlaier sa_family_t af = pd->af; 4321126258Smlaier u_short reason; 4322171168Smlaier int tag = -1, rtableid = -1; 4323145836Smlaier int asd = 0; 4324171168Smlaier int match = 0; 4325126258Smlaier 4326145836Smlaier if (pf_check_congestion(ifq)) { 4327145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 4328145836Smlaier return (PF_DROP); 4329145836Smlaier } 4330145836Smlaier 4331126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4332126258Smlaier 4333126258Smlaier if (direction == PF_OUT) { 4334126258Smlaier /* check outgoing packet for BINAT/NAT */ 4335130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 4336130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 4337130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 4338126258Smlaier switch (af) { 4339126258Smlaier#ifdef INET 4340126258Smlaier case AF_INET: 4341126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 4342130613Smlaier pd->naddr.v4.s_addr, 0); 4343126258Smlaier break; 4344126258Smlaier#endif /* INET */ 4345126258Smlaier#ifdef INET6 4346126258Smlaier case AF_INET6: 4347130613Smlaier PF_ACPY(saddr, &pd->naddr, af); 4348126258Smlaier break; 4349126258Smlaier#endif /* INET6 */ 4350126258Smlaier } 4351130613Smlaier if (nr->natpass) 4352126258Smlaier r = NULL; 4353130613Smlaier pd->nat_rule = nr; 4354126258Smlaier } 4355126258Smlaier } else { 4356126258Smlaier /* check incoming packet for BINAT/RDR */ 4357130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 4358130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 4359130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 4360126258Smlaier switch (af) { 4361126258Smlaier#ifdef INET 4362126258Smlaier case AF_INET: 4363126258Smlaier pf_change_a(&daddr->v4.s_addr, 4364130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 4365126258Smlaier break; 4366126258Smlaier#endif /* INET */ 4367126258Smlaier#ifdef INET6 4368126258Smlaier case AF_INET6: 4369130613Smlaier PF_ACPY(daddr, &pd->naddr, af); 4370126258Smlaier break; 4371126258Smlaier#endif /* INET6 */ 4372126258Smlaier } 4373130613Smlaier if (nr->natpass) 4374126258Smlaier r = NULL; 4375130613Smlaier pd->nat_rule = nr; 4376126258Smlaier } 4377126258Smlaier } 4378126258Smlaier 4379126258Smlaier while (r != NULL) { 4380126258Smlaier r->evaluations++; 4381171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 4382126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4383126258Smlaier else if (r->direction && r->direction != direction) 4384126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4385126258Smlaier else if (r->af && r->af != af) 4386126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4387126258Smlaier else if (r->proto && r->proto != pd->proto) 4388126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4389171168Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, 4390171168Smlaier r->src.neg, kif)) 4391126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4392171168Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, 4393171168Smlaier r->dst.neg, NULL)) 4394126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4395171168Smlaier else if (r->tos && !(r->tos == pd->tos)) 4396126258Smlaier r = TAILQ_NEXT(r, entries); 4397126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 4398126258Smlaier r = TAILQ_NEXT(r, entries); 4399145836Smlaier else if (r->prob && r->prob <= arc4random()) 4400126258Smlaier r = TAILQ_NEXT(r, entries); 4401171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 4402126258Smlaier r = TAILQ_NEXT(r, entries); 4403126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 4404126258Smlaier r = TAILQ_NEXT(r, entries); 4405126258Smlaier else { 4406126258Smlaier if (r->tag) 4407126258Smlaier tag = r->tag; 4408171168Smlaier if (r->rtableid >= 0) 4409171168Smlaier rtableid = r->rtableid; 4410126258Smlaier if (r->anchor == NULL) { 4411171168Smlaier match = 1; 4412126258Smlaier *rm = r; 4413126258Smlaier *am = a; 4414126258Smlaier *rsm = ruleset; 4415126258Smlaier if ((*rm)->quick) 4416126258Smlaier break; 4417126258Smlaier r = TAILQ_NEXT(r, entries); 4418126258Smlaier } else 4419145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4420171168Smlaier PF_RULESET_FILTER, &r, &a, &match); 4421126258Smlaier } 4422171168Smlaier if (r == NULL && pf_step_out_of_anchor(&asd, &ruleset, 4423171168Smlaier PF_RULESET_FILTER, &r, &a, &match)) 4424171168Smlaier break; 4425126258Smlaier } 4426126258Smlaier r = *rm; 4427126258Smlaier a = *am; 4428126258Smlaier ruleset = *rsm; 4429126258Smlaier 4430126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4431130613Smlaier 4432171168Smlaier if (r->log || (nr != NULL && nr->natpass && nr->log)) 4433171168Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r->log ? r : nr, 4434171168Smlaier a, ruleset, pd); 4435126258Smlaier 4436126258Smlaier if ((r->action == PF_DROP) && 4437126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 4438126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 4439126258Smlaier struct pf_addr *a = NULL; 4440126258Smlaier 4441130613Smlaier if (nr != NULL) { 4442130613Smlaier if (direction == PF_OUT) 4443130613Smlaier a = saddr; 4444130613Smlaier else 4445130613Smlaier a = daddr; 4446130613Smlaier } 4447126258Smlaier if (a != NULL) { 4448126258Smlaier switch (af) { 4449126258Smlaier#ifdef INET 4450126258Smlaier case AF_INET: 4451126258Smlaier pf_change_a(&a->v4.s_addr, pd->ip_sum, 4452130613Smlaier pd->baddr.v4.s_addr, 0); 4453126258Smlaier break; 4454126258Smlaier#endif /* INET */ 4455126258Smlaier#ifdef INET6 4456126258Smlaier case AF_INET6: 4457130613Smlaier PF_ACPY(a, &pd->baddr, af); 4458126258Smlaier break; 4459126258Smlaier#endif /* INET6 */ 4460126258Smlaier } 4461126258Smlaier } 4462126258Smlaier if ((af == AF_INET) && r->return_icmp) 4463126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 4464126258Smlaier r->return_icmp & 255, af, r); 4465126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 4466126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 4467126258Smlaier r->return_icmp6 & 255, af, r); 4468126258Smlaier } 4469126258Smlaier 4470126258Smlaier if (r->action != PF_PASS) 4471126258Smlaier return (PF_DROP); 4472126258Smlaier 4473171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, rtableid)) { 4474126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4475126258Smlaier return (PF_DROP); 4476126258Smlaier } 4477126258Smlaier 4478130613Smlaier if (r->keep_state || nr != NULL) { 4479126258Smlaier /* create new state */ 4480126258Smlaier struct pf_state *s = NULL; 4481130613Smlaier struct pf_src_node *sn = NULL; 4482126258Smlaier 4483130613Smlaier /* check maximums */ 4484145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 4485145836Smlaier pf_status.lcounters[LCNT_STATES]++; 4486145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 4487130613Smlaier goto cleanup; 4488145836Smlaier } 4489171168Smlaier /* src node for filter rule */ 4490130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 4491130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 4492145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 4493145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4494130613Smlaier goto cleanup; 4495145836Smlaier } 4496130613Smlaier /* src node for translation rule */ 4497130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 4498130613Smlaier ((direction == PF_OUT && 4499130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 4500145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 4501145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4502130613Smlaier goto cleanup; 4503145836Smlaier } 4504130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 4505126258Smlaier if (s == NULL) { 4506145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 4507130613Smlaiercleanup: 4508130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 4509130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 4510130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4511130613Smlaier pf_status.src_nodes--; 4512130613Smlaier pool_put(&pf_src_tree_pl, sn); 4513130613Smlaier } 4514130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 4515130613Smlaier nsn->expire == 0) { 4516130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 4517130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4518130613Smlaier pf_status.src_nodes--; 4519130613Smlaier pool_put(&pf_src_tree_pl, nsn); 4520130613Smlaier } 4521126258Smlaier return (PF_DROP); 4522126258Smlaier } 4523126258Smlaier bzero(s, sizeof(*s)); 4524126258Smlaier s->rule.ptr = r; 4525130613Smlaier s->nat_rule.ptr = nr; 4526126258Smlaier s->anchor.ptr = a; 4527145836Smlaier STATE_INC_COUNTERS(s); 4528126258Smlaier s->allow_opts = r->allow_opts; 4529171168Smlaier s->log = r->log & PF_LOG_ALL; 4530171168Smlaier if (nr != NULL) 4531171168Smlaier s->log |= nr->log & PF_LOG_ALL; 4532126258Smlaier s->proto = pd->proto; 4533126258Smlaier s->direction = direction; 4534126258Smlaier s->af = af; 4535126258Smlaier if (direction == PF_OUT) { 4536126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 4537126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 4538130613Smlaier if (nr != NULL) 4539130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 4540126258Smlaier else 4541126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 4542126258Smlaier } else { 4543126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 4544126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 4545130613Smlaier if (nr != NULL) 4546130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 4547126258Smlaier else 4548126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 4549126258Smlaier } 4550126258Smlaier s->src.state = PFOTHERS_SINGLE; 4551126258Smlaier s->dst.state = PFOTHERS_NO_TRAFFIC; 4552126261Smlaier s->creation = time_second; 4553126261Smlaier s->expire = time_second; 4554126258Smlaier s->timeout = PFTM_OTHER_FIRST_PACKET; 4555126258Smlaier pf_set_rt_ifp(s, saddr); 4556130613Smlaier if (sn != NULL) { 4557130613Smlaier s->src_node = sn; 4558130613Smlaier s->src_node->states++; 4559130613Smlaier } 4560130613Smlaier if (nsn != NULL) { 4561130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 4562130613Smlaier s->nat_src_node = nsn; 4563130613Smlaier s->nat_src_node->states++; 4564130613Smlaier } 4565130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 4566145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 4567130613Smlaier pf_src_tree_remove_state(s); 4568145836Smlaier STATE_DEC_COUNTERS(s); 4569126258Smlaier pool_put(&pf_state_pl, s); 4570126258Smlaier return (PF_DROP); 4571126258Smlaier } else 4572126258Smlaier *sm = s; 4573145836Smlaier if (tag > 0) { 4574145836Smlaier pf_tag_ref(tag); 4575145836Smlaier s->tag = tag; 4576145836Smlaier } 4577126258Smlaier } 4578126258Smlaier 4579126258Smlaier return (PF_PASS); 4580126258Smlaier} 4581126258Smlaier 4582126258Smlaierint 4583130613Smlaierpf_test_fragment(struct pf_rule **rm, int direction, struct pfi_kif *kif, 4584126258Smlaier struct mbuf *m, void *h, struct pf_pdesc *pd, struct pf_rule **am, 4585126258Smlaier struct pf_ruleset **rsm) 4586126258Smlaier{ 4587126258Smlaier struct pf_rule *r, *a = NULL; 4588126258Smlaier struct pf_ruleset *ruleset = NULL; 4589126258Smlaier sa_family_t af = pd->af; 4590126258Smlaier u_short reason; 4591126258Smlaier int tag = -1; 4592145836Smlaier int asd = 0; 4593171168Smlaier int match = 0; 4594126258Smlaier 4595126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4596126258Smlaier while (r != NULL) { 4597126258Smlaier r->evaluations++; 4598171168Smlaier if (pfi_kif_match(r->kif, kif) == r->ifnot) 4599126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4600126258Smlaier else if (r->direction && r->direction != direction) 4601126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4602126258Smlaier else if (r->af && r->af != af) 4603126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4604126258Smlaier else if (r->proto && r->proto != pd->proto) 4605126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4606171168Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, 4607171168Smlaier r->src.neg, kif)) 4608126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4609171168Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, 4610171168Smlaier r->dst.neg, NULL)) 4611126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4612171168Smlaier else if (r->tos && !(r->tos == pd->tos)) 4613126258Smlaier r = TAILQ_NEXT(r, entries); 4614173815Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 4615126258Smlaier r = TAILQ_NEXT(r, entries); 4616173815Smlaier else if (pd->proto == IPPROTO_UDP && 4617173815Smlaier (r->src.port_op || r->dst.port_op)) 4618173815Smlaier r = TAILQ_NEXT(r, entries); 4619173815Smlaier else if (pd->proto == IPPROTO_TCP && 4620173815Smlaier (r->src.port_op || r->dst.port_op || r->flagset)) 4621173815Smlaier r = TAILQ_NEXT(r, entries); 4622173815Smlaier else if ((pd->proto == IPPROTO_ICMP || 4623173815Smlaier pd->proto == IPPROTO_ICMPV6) && 4624173815Smlaier (r->type || r->code)) 4625173815Smlaier r = TAILQ_NEXT(r, entries); 4626145836Smlaier else if (r->prob && r->prob <= arc4random()) 4627126258Smlaier r = TAILQ_NEXT(r, entries); 4628171168Smlaier else if (r->match_tag && !pf_match_tag(m, r, pd->pf_mtag, &tag)) 4629126258Smlaier r = TAILQ_NEXT(r, entries); 4630126258Smlaier else { 4631126258Smlaier if (r->anchor == NULL) { 4632171168Smlaier match = 1; 4633126258Smlaier *rm = r; 4634126258Smlaier *am = a; 4635126258Smlaier *rsm = ruleset; 4636126258Smlaier if ((*rm)->quick) 4637126258Smlaier break; 4638126258Smlaier r = TAILQ_NEXT(r, entries); 4639126258Smlaier } else 4640145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4641171168Smlaier PF_RULESET_FILTER, &r, &a, &match); 4642126258Smlaier } 4643171168Smlaier if (r == NULL && pf_step_out_of_anchor(&asd, &ruleset, 4644171168Smlaier PF_RULESET_FILTER, &r, &a, &match)) 4645171168Smlaier break; 4646126258Smlaier } 4647126258Smlaier r = *rm; 4648126258Smlaier a = *am; 4649126258Smlaier ruleset = *rsm; 4650126258Smlaier 4651126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4652130613Smlaier 4653126258Smlaier if (r->log) 4654171168Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset, 4655171168Smlaier pd); 4656126258Smlaier 4657126258Smlaier if (r->action != PF_PASS) 4658126258Smlaier return (PF_DROP); 4659126258Smlaier 4660171168Smlaier if (pf_tag_packet(m, pd->pf_mtag, tag, -1)) { 4661126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4662126258Smlaier return (PF_DROP); 4663126258Smlaier } 4664126258Smlaier 4665126258Smlaier return (PF_PASS); 4666126258Smlaier} 4667126258Smlaier 4668126258Smlaierint 4669130613Smlaierpf_test_state_tcp(struct pf_state **state, int direction, struct pfi_kif *kif, 4670130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 4671126258Smlaier u_short *reason) 4672126258Smlaier{ 4673171168Smlaier struct pf_state_cmp key; 4674126258Smlaier struct tcphdr *th = pd->hdr.tcp; 4675126258Smlaier u_int16_t win = ntohs(th->th_win); 4676145836Smlaier u_int32_t ack, end, seq, orig_seq; 4677126258Smlaier u_int8_t sws, dws; 4678130613Smlaier int ackskew; 4679126258Smlaier int copyback = 0; 4680126258Smlaier struct pf_state_peer *src, *dst; 4681126258Smlaier 4682126258Smlaier key.af = pd->af; 4683126258Smlaier key.proto = IPPROTO_TCP; 4684130613Smlaier if (direction == PF_IN) { 4685130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4686130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4687130613Smlaier key.ext.port = th->th_sport; 4688130613Smlaier key.gwy.port = th->th_dport; 4689130613Smlaier } else { 4690130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4691130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4692130613Smlaier key.lan.port = th->th_sport; 4693130613Smlaier key.ext.port = th->th_dport; 4694130613Smlaier } 4695126258Smlaier 4696126258Smlaier STATE_LOOKUP(); 4697126258Smlaier 4698126258Smlaier if (direction == (*state)->direction) { 4699126258Smlaier src = &(*state)->src; 4700126258Smlaier dst = &(*state)->dst; 4701126258Smlaier } else { 4702126258Smlaier src = &(*state)->dst; 4703126258Smlaier dst = &(*state)->src; 4704126258Smlaier } 4705126258Smlaier 4706126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_SRC) { 4707145836Smlaier if (direction != (*state)->direction) { 4708145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4709126258Smlaier return (PF_SYNPROXY_DROP); 4710145836Smlaier } 4711126258Smlaier if (th->th_flags & TH_SYN) { 4712145836Smlaier if (ntohl(th->th_seq) != (*state)->src.seqlo) { 4713145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4714126258Smlaier return (PF_DROP); 4715145836Smlaier } 4716162238Scsjp#ifdef __FreeBSD__ 4717162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, pd->dst, 4718162238Scsjp#else 4719126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4720162238Scsjp#endif 4721126258Smlaier pd->src, th->th_dport, th->th_sport, 4722126258Smlaier (*state)->src.seqhi, ntohl(th->th_seq) + 1, 4723145836Smlaier TH_SYN|TH_ACK, 0, (*state)->src.mss, 0, 1, 4724171168Smlaier 0, NULL, NULL); 4725145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4726126258Smlaier return (PF_SYNPROXY_DROP); 4727126258Smlaier } else if (!(th->th_flags & TH_ACK) || 4728126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4729145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4730145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4731126258Smlaier return (PF_DROP); 4732145836Smlaier } else if ((*state)->src_node != NULL && 4733145836Smlaier pf_src_connlimit(state)) { 4734145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 4735145836Smlaier return (PF_DROP); 4736145836Smlaier } else 4737126258Smlaier (*state)->src.state = PF_TCPS_PROXY_DST; 4738126258Smlaier } 4739126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_DST) { 4740126258Smlaier struct pf_state_host *src, *dst; 4741126258Smlaier 4742126258Smlaier if (direction == PF_OUT) { 4743126258Smlaier src = &(*state)->gwy; 4744126258Smlaier dst = &(*state)->ext; 4745126258Smlaier } else { 4746126258Smlaier src = &(*state)->ext; 4747126258Smlaier dst = &(*state)->lan; 4748126258Smlaier } 4749126258Smlaier if (direction == (*state)->direction) { 4750126258Smlaier if (((th->th_flags & (TH_SYN|TH_ACK)) != TH_ACK) || 4751126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4752145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4753145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4754126258Smlaier return (PF_DROP); 4755145836Smlaier } 4756126258Smlaier (*state)->src.max_win = MAX(ntohs(th->th_win), 1); 4757126258Smlaier if ((*state)->dst.seqhi == 1) 4758145836Smlaier (*state)->dst.seqhi = htonl(arc4random()); 4759162238Scsjp#ifdef __FreeBSD__ 4760162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, 4761162238Scsjp &src->addr, 4762162238Scsjp#else 4763126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4764162238Scsjp#endif 4765126258Smlaier &dst->addr, src->port, dst->port, 4766130613Smlaier (*state)->dst.seqhi, 0, TH_SYN, 0, 4767171168Smlaier (*state)->src.mss, 0, 0, (*state)->tag, NULL, NULL); 4768145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4769126258Smlaier return (PF_SYNPROXY_DROP); 4770126258Smlaier } else if (((th->th_flags & (TH_SYN|TH_ACK)) != 4771126258Smlaier (TH_SYN|TH_ACK)) || 4772145836Smlaier (ntohl(th->th_ack) != (*state)->dst.seqhi + 1)) { 4773145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4774126258Smlaier return (PF_DROP); 4775145836Smlaier } else { 4776126258Smlaier (*state)->dst.max_win = MAX(ntohs(th->th_win), 1); 4777126258Smlaier (*state)->dst.seqlo = ntohl(th->th_seq); 4778162238Scsjp#ifdef __FreeBSD__ 4779162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, pd->dst, 4780162238Scsjp#else 4781126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4782162238Scsjp#endif 4783126258Smlaier pd->src, th->th_dport, th->th_sport, 4784126258Smlaier ntohl(th->th_ack), ntohl(th->th_seq) + 1, 4785145836Smlaier TH_ACK, (*state)->src.max_win, 0, 0, 0, 4786171168Smlaier (*state)->tag, NULL, NULL); 4787162238Scsjp#ifdef __FreeBSD__ 4788162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, 4789162238Scsjp &src->addr, 4790162238Scsjp#else 4791126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4792162238Scsjp#endif 4793126258Smlaier &dst->addr, src->port, dst->port, 4794126258Smlaier (*state)->src.seqhi + 1, (*state)->src.seqlo + 1, 4795145836Smlaier TH_ACK, (*state)->dst.max_win, 0, 0, 1, 4796171168Smlaier 0, NULL, NULL); 4797126258Smlaier (*state)->src.seqdiff = (*state)->dst.seqhi - 4798126258Smlaier (*state)->src.seqlo; 4799126258Smlaier (*state)->dst.seqdiff = (*state)->src.seqhi - 4800126258Smlaier (*state)->dst.seqlo; 4801126258Smlaier (*state)->src.seqhi = (*state)->src.seqlo + 4802145875Smlaier (*state)->dst.max_win; 4803145875Smlaier (*state)->dst.seqhi = (*state)->dst.seqlo + 4804145836Smlaier (*state)->src.max_win; 4805126258Smlaier (*state)->src.wscale = (*state)->dst.wscale = 0; 4806126258Smlaier (*state)->src.state = (*state)->dst.state = 4807126258Smlaier TCPS_ESTABLISHED; 4808145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4809126258Smlaier return (PF_SYNPROXY_DROP); 4810126258Smlaier } 4811126258Smlaier } 4812126258Smlaier 4813181295Smlaier if (((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN) && 4814181295Smlaier dst->state >= TCPS_FIN_WAIT_2 && 4815181295Smlaier src->state >= TCPS_FIN_WAIT_2) { 4816181295Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 4817181295Smlaier printf("pf: state reuse "); 4818181295Smlaier pf_print_state(*state); 4819181295Smlaier pf_print_flags(th->th_flags); 4820181295Smlaier printf("\n"); 4821181295Smlaier } 4822181295Smlaier /* XXX make sure it's the same direction ?? */ 4823181295Smlaier (*state)->src.state = (*state)->dst.state = TCPS_CLOSED; 4824181295Smlaier pf_unlink_state(*state); 4825181295Smlaier *state = NULL; 4826181295Smlaier return (PF_DROP); 4827181295Smlaier } 4828181295Smlaier 4829126258Smlaier if (src->wscale && dst->wscale && !(th->th_flags & TH_SYN)) { 4830126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4831126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4832126258Smlaier } else 4833126258Smlaier sws = dws = 0; 4834126258Smlaier 4835126258Smlaier /* 4836126258Smlaier * Sequence tracking algorithm from Guido van Rooij's paper: 4837126258Smlaier * http://www.madison-gurkha.com/publications/tcp_filtering/ 4838126258Smlaier * tcp_filtering.ps 4839126258Smlaier */ 4840126258Smlaier 4841145836Smlaier orig_seq = seq = ntohl(th->th_seq); 4842126258Smlaier if (src->seqlo == 0) { 4843126258Smlaier /* First packet from this end. Set its state */ 4844126258Smlaier 4845126258Smlaier if ((pd->flags & PFDESC_TCP_NORM || dst->scrub) && 4846126258Smlaier src->scrub == NULL) { 4847126258Smlaier if (pf_normalize_tcp_init(m, off, pd, th, src, dst)) { 4848126258Smlaier REASON_SET(reason, PFRES_MEMORY); 4849126258Smlaier return (PF_DROP); 4850126258Smlaier } 4851126258Smlaier } 4852126258Smlaier 4853126258Smlaier /* Deferred generation of sequence number modulator */ 4854126258Smlaier if (dst->seqdiff && !src->seqdiff) { 4855171168Smlaier#ifdef __FreeBSD__ 4856171168Smlaier while ((src->seqdiff = pf_new_isn(*state) - seq) == 0) 4857126258Smlaier ; 4858171168Smlaier#else 4859171168Smlaier while ((src->seqdiff = tcp_rndiss_next() - seq) == 0) 4860171168Smlaier ; 4861171168Smlaier#endif 4862126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4863126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4864126258Smlaier src->seqdiff), 0); 4865126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4866126258Smlaier copyback = 1; 4867126258Smlaier } else { 4868126258Smlaier ack = ntohl(th->th_ack); 4869126258Smlaier } 4870126258Smlaier 4871126258Smlaier end = seq + pd->p_len; 4872126258Smlaier if (th->th_flags & TH_SYN) { 4873126258Smlaier end++; 4874126258Smlaier if (dst->wscale & PF_WSCALE_FLAG) { 4875126258Smlaier src->wscale = pf_get_wscale(m, off, th->th_off, 4876126258Smlaier pd->af); 4877126258Smlaier if (src->wscale & PF_WSCALE_FLAG) { 4878126258Smlaier /* Remove scale factor from initial 4879126258Smlaier * window */ 4880126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4881126258Smlaier win = ((u_int32_t)win + (1 << sws) - 1) 4882126258Smlaier >> sws; 4883126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4884126258Smlaier } else { 4885126258Smlaier /* fixup other window */ 4886126258Smlaier dst->max_win <<= dst->wscale & 4887126258Smlaier PF_WSCALE_MASK; 4888126258Smlaier /* in case of a retrans SYN|ACK */ 4889126258Smlaier dst->wscale = 0; 4890126258Smlaier } 4891126258Smlaier } 4892126258Smlaier } 4893126258Smlaier if (th->th_flags & TH_FIN) 4894126258Smlaier end++; 4895126258Smlaier 4896126258Smlaier src->seqlo = seq; 4897126258Smlaier if (src->state < TCPS_SYN_SENT) 4898126258Smlaier src->state = TCPS_SYN_SENT; 4899126258Smlaier 4900126258Smlaier /* 4901126258Smlaier * May need to slide the window (seqhi may have been set by 4902126258Smlaier * the crappy stack check or if we picked up the connection 4903126258Smlaier * after establishment) 4904126258Smlaier */ 4905126258Smlaier if (src->seqhi == 1 || 4906126258Smlaier SEQ_GEQ(end + MAX(1, dst->max_win << dws), src->seqhi)) 4907126258Smlaier src->seqhi = end + MAX(1, dst->max_win << dws); 4908126258Smlaier if (win > src->max_win) 4909126258Smlaier src->max_win = win; 4910126258Smlaier 4911126258Smlaier } else { 4912126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4913126258Smlaier if (src->seqdiff) { 4914126258Smlaier /* Modulate sequence numbers */ 4915126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4916126258Smlaier src->seqdiff), 0); 4917126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4918126258Smlaier copyback = 1; 4919126258Smlaier } 4920126258Smlaier end = seq + pd->p_len; 4921126258Smlaier if (th->th_flags & TH_SYN) 4922126258Smlaier end++; 4923126258Smlaier if (th->th_flags & TH_FIN) 4924126258Smlaier end++; 4925126258Smlaier } 4926126258Smlaier 4927126258Smlaier if ((th->th_flags & TH_ACK) == 0) { 4928126258Smlaier /* Let it pass through the ack skew check */ 4929126258Smlaier ack = dst->seqlo; 4930126258Smlaier } else if ((ack == 0 && 4931126258Smlaier (th->th_flags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) || 4932126258Smlaier /* broken tcp stacks do not set ack */ 4933126258Smlaier (dst->state < TCPS_SYN_SENT)) { 4934126258Smlaier /* 4935126258Smlaier * Many stacks (ours included) will set the ACK number in an 4936126258Smlaier * FIN|ACK if the SYN times out -- no sequence to ACK. 4937126258Smlaier */ 4938126258Smlaier ack = dst->seqlo; 4939126258Smlaier } 4940126258Smlaier 4941126258Smlaier if (seq == end) { 4942126258Smlaier /* Ease sequencing restrictions on no data packets */ 4943126258Smlaier seq = src->seqlo; 4944126258Smlaier end = seq; 4945126258Smlaier } 4946126258Smlaier 4947126258Smlaier ackskew = dst->seqlo - ack; 4948126258Smlaier 4949171168Smlaier 4950171168Smlaier /* 4951171168Smlaier * Need to demodulate the sequence numbers in any TCP SACK options 4952171168Smlaier * (Selective ACK). We could optionally validate the SACK values 4953171168Smlaier * against the current ACK window, either forwards or backwards, but 4954171168Smlaier * I'm not confident that SACK has been implemented properly 4955171168Smlaier * everywhere. It wouldn't surprise me if several stacks accidently 4956171168Smlaier * SACK too far backwards of previously ACKed data. There really aren't 4957171168Smlaier * any security implications of bad SACKing unless the target stack 4958171168Smlaier * doesn't validate the option length correctly. Someone trying to 4959171168Smlaier * spoof into a TCP connection won't bother blindly sending SACK 4960171168Smlaier * options anyway. 4961171168Smlaier */ 4962171168Smlaier if (dst->seqdiff && (th->th_off << 2) > sizeof(struct tcphdr)) { 4963171168Smlaier if (pf_modulate_sack(m, off, pd, th, dst)) 4964171168Smlaier copyback = 1; 4965171168Smlaier } 4966171168Smlaier 4967171168Smlaier 4968126258Smlaier#define MAXACKWINDOW (0xffff + 1500) /* 1500 is an arbitrary fudge factor */ 4969126258Smlaier if (SEQ_GEQ(src->seqhi, end) && 4970126258Smlaier /* Last octet inside other's window space */ 4971126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) && 4972126258Smlaier /* Retrans: not more than one window back */ 4973126258Smlaier (ackskew >= -MAXACKWINDOW) && 4974126258Smlaier /* Acking not more than one reassembled fragment backwards */ 4975145836Smlaier (ackskew <= (MAXACKWINDOW << sws)) && 4976126258Smlaier /* Acking not more than one window forward */ 4977145836Smlaier ((th->th_flags & TH_RST) == 0 || orig_seq == src->seqlo || 4978171168Smlaier (orig_seq == src->seqlo + 1) || (pd->flags & PFDESC_IP_REAS) == 0)) { 4979171168Smlaier /* Require an exact/+1 sequence match on resets when possible */ 4980126258Smlaier 4981145836Smlaier if (dst->scrub || src->scrub) { 4982145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4983145836Smlaier *state, src, dst, ©back)) 4984145836Smlaier return (PF_DROP); 4985145836Smlaier } 4986145836Smlaier 4987126258Smlaier /* update max window */ 4988126258Smlaier if (src->max_win < win) 4989126258Smlaier src->max_win = win; 4990126258Smlaier /* synchronize sequencing */ 4991126258Smlaier if (SEQ_GT(end, src->seqlo)) 4992126258Smlaier src->seqlo = end; 4993126258Smlaier /* slide the window of what the other end can send */ 4994126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4995126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4996126258Smlaier 4997126258Smlaier 4998126258Smlaier /* update states */ 4999126258Smlaier if (th->th_flags & TH_SYN) 5000126258Smlaier if (src->state < TCPS_SYN_SENT) 5001126258Smlaier src->state = TCPS_SYN_SENT; 5002126258Smlaier if (th->th_flags & TH_FIN) 5003126258Smlaier if (src->state < TCPS_CLOSING) 5004126258Smlaier src->state = TCPS_CLOSING; 5005126258Smlaier if (th->th_flags & TH_ACK) { 5006145836Smlaier if (dst->state == TCPS_SYN_SENT) { 5007126258Smlaier dst->state = TCPS_ESTABLISHED; 5008145836Smlaier if (src->state == TCPS_ESTABLISHED && 5009145836Smlaier (*state)->src_node != NULL && 5010145836Smlaier pf_src_connlimit(state)) { 5011145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 5012145836Smlaier return (PF_DROP); 5013145836Smlaier } 5014145836Smlaier } else if (dst->state == TCPS_CLOSING) 5015126258Smlaier dst->state = TCPS_FIN_WAIT_2; 5016126258Smlaier } 5017126258Smlaier if (th->th_flags & TH_RST) 5018126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 5019126258Smlaier 5020126258Smlaier /* update expire time */ 5021126261Smlaier (*state)->expire = time_second; 5022126258Smlaier if (src->state >= TCPS_FIN_WAIT_2 && 5023126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 5024126258Smlaier (*state)->timeout = PFTM_TCP_CLOSED; 5025171168Smlaier else if (src->state >= TCPS_CLOSING && 5026171168Smlaier dst->state >= TCPS_CLOSING) 5027126258Smlaier (*state)->timeout = PFTM_TCP_FIN_WAIT; 5028126258Smlaier else if (src->state < TCPS_ESTABLISHED || 5029126258Smlaier dst->state < TCPS_ESTABLISHED) 5030126258Smlaier (*state)->timeout = PFTM_TCP_OPENING; 5031126258Smlaier else if (src->state >= TCPS_CLOSING || 5032126258Smlaier dst->state >= TCPS_CLOSING) 5033126258Smlaier (*state)->timeout = PFTM_TCP_CLOSING; 5034126258Smlaier else 5035126258Smlaier (*state)->timeout = PFTM_TCP_ESTABLISHED; 5036126258Smlaier 5037126258Smlaier /* Fall through to PASS packet */ 5038126258Smlaier 5039126258Smlaier } else if ((dst->state < TCPS_SYN_SENT || 5040126258Smlaier dst->state >= TCPS_FIN_WAIT_2 || 5041126258Smlaier src->state >= TCPS_FIN_WAIT_2) && 5042126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) && 5043126258Smlaier /* Within a window forward of the originating packet */ 5044126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW)) { 5045126258Smlaier /* Within a window backward of the originating packet */ 5046126258Smlaier 5047126258Smlaier /* 5048126258Smlaier * This currently handles three situations: 5049126258Smlaier * 1) Stupid stacks will shotgun SYNs before their peer 5050126258Smlaier * replies. 5051126258Smlaier * 2) When PF catches an already established stream (the 5052126258Smlaier * firewall rebooted, the state table was flushed, routes 5053126258Smlaier * changed...) 5054126258Smlaier * 3) Packets get funky immediately after the connection 5055126258Smlaier * closes (this should catch Solaris spurious ACK|FINs 5056126258Smlaier * that web servers like to spew after a close) 5057126258Smlaier * 5058126258Smlaier * This must be a little more careful than the above code 5059126258Smlaier * since packet floods will also be caught here. We don't 5060126258Smlaier * update the TTL here to mitigate the damage of a packet 5061126258Smlaier * flood and so the same code can handle awkward establishment 5062126258Smlaier * and a loosened connection close. 5063126258Smlaier * In the establishment case, a correct peer response will 5064126258Smlaier * validate the connection, go through the normal state code 5065126258Smlaier * and keep updating the state TTL. 5066126258Smlaier */ 5067126258Smlaier 5068126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 5069126258Smlaier printf("pf: loose state match: "); 5070126258Smlaier pf_print_state(*state); 5071126258Smlaier pf_print_flags(th->th_flags); 5072171168Smlaier printf(" seq=%u (%u) ack=%u len=%u ackskew=%d " 5073171168Smlaier "pkts=%llu:%llu\n", seq, orig_seq, ack, pd->p_len, 5074171168Smlaier#ifdef __FreeBSD__ 5075171168Smlaier ackskew, (unsigned long long)(*state)->packets[0], 5076171168Smlaier (unsigned long long)(*state)->packets[1]); 5077171168Smlaier#else 5078171168Smlaier ackskew, (*state)->packets[0], 5079171168Smlaier (*state)->packets[1]); 5080171168Smlaier#endif 5081126258Smlaier } 5082126258Smlaier 5083145836Smlaier if (dst->scrub || src->scrub) { 5084145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 5085145836Smlaier *state, src, dst, ©back)) 5086145836Smlaier return (PF_DROP); 5087145836Smlaier } 5088145836Smlaier 5089126258Smlaier /* update max window */ 5090126258Smlaier if (src->max_win < win) 5091126258Smlaier src->max_win = win; 5092126258Smlaier /* synchronize sequencing */ 5093126258Smlaier if (SEQ_GT(end, src->seqlo)) 5094126258Smlaier src->seqlo = end; 5095126258Smlaier /* slide the window of what the other end can send */ 5096126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 5097126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 5098126258Smlaier 5099126258Smlaier /* 5100126258Smlaier * Cannot set dst->seqhi here since this could be a shotgunned 5101126258Smlaier * SYN and not an already established connection. 5102126258Smlaier */ 5103126258Smlaier 5104126258Smlaier if (th->th_flags & TH_FIN) 5105126258Smlaier if (src->state < TCPS_CLOSING) 5106126258Smlaier src->state = TCPS_CLOSING; 5107126258Smlaier if (th->th_flags & TH_RST) 5108126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 5109126258Smlaier 5110126258Smlaier /* Fall through to PASS packet */ 5111126258Smlaier 5112126258Smlaier } else { 5113126258Smlaier if ((*state)->dst.state == TCPS_SYN_SENT && 5114126258Smlaier (*state)->src.state == TCPS_SYN_SENT) { 5115126258Smlaier /* Send RST for state mismatches during handshake */ 5116145836Smlaier if (!(th->th_flags & TH_RST)) 5117162238Scsjp#ifdef __FreeBSD__ 5118162238Scsjp pf_send_tcp(m, (*state)->rule.ptr, pd->af, 5119162238Scsjp#else 5120126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, 5121162238Scsjp#endif 5122126258Smlaier pd->dst, pd->src, th->th_dport, 5123145836Smlaier th->th_sport, ntohl(th->th_ack), 0, 5124145836Smlaier TH_RST, 0, 0, 5125171168Smlaier (*state)->rule.ptr->return_ttl, 1, 0, 5126145836Smlaier pd->eh, kif->pfik_ifp); 5127126258Smlaier src->seqlo = 0; 5128126258Smlaier src->seqhi = 1; 5129126258Smlaier src->max_win = 1; 5130126258Smlaier } else if (pf_status.debug >= PF_DEBUG_MISC) { 5131126258Smlaier printf("pf: BAD state: "); 5132126258Smlaier pf_print_state(*state); 5133126258Smlaier pf_print_flags(th->th_flags); 5134171168Smlaier printf(" seq=%u (%u) ack=%u len=%u ackskew=%d " 5135171168Smlaier "pkts=%llu:%llu dir=%s,%s\n", 5136171168Smlaier seq, orig_seq, ack, pd->p_len, ackskew, 5137171168Smlaier#ifdef __FreeBSD__ 5138171168Smlaier (unsigned long long)(*state)->packets[0], 5139171168Smlaier (unsigned long long)(*state)->packets[1], 5140171168Smlaier#else 5141126258Smlaier (*state)->packets[0], (*state)->packets[1], 5142171168Smlaier#endif 5143126258Smlaier direction == PF_IN ? "in" : "out", 5144126258Smlaier direction == (*state)->direction ? "fwd" : "rev"); 5145126258Smlaier printf("pf: State failure on: %c %c %c %c | %c %c\n", 5146126258Smlaier SEQ_GEQ(src->seqhi, end) ? ' ' : '1', 5147126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) ? 5148126258Smlaier ' ': '2', 5149126258Smlaier (ackskew >= -MAXACKWINDOW) ? ' ' : '3', 5150126258Smlaier (ackskew <= (MAXACKWINDOW << sws)) ? ' ' : '4', 5151126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) ?' ' :'5', 5152126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW) ?' ' :'6'); 5153126258Smlaier } 5154145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 5155126258Smlaier return (PF_DROP); 5156126258Smlaier } 5157126258Smlaier 5158126258Smlaier /* Any packets which have gotten here are to be passed */ 5159126258Smlaier 5160126258Smlaier /* translate source/destination address, if necessary */ 5161126258Smlaier if (STATE_TRANSLATE(*state)) { 5162126258Smlaier if (direction == PF_OUT) 5163126258Smlaier pf_change_ap(pd->src, &th->th_sport, pd->ip_sum, 5164126258Smlaier &th->th_sum, &(*state)->gwy.addr, 5165126258Smlaier (*state)->gwy.port, 0, pd->af); 5166126258Smlaier else 5167126258Smlaier pf_change_ap(pd->dst, &th->th_dport, pd->ip_sum, 5168126258Smlaier &th->th_sum, &(*state)->lan.addr, 5169126258Smlaier (*state)->lan.port, 0, pd->af); 5170126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 5171126258Smlaier } else if (copyback) { 5172126258Smlaier /* Copyback sequence modulation or stateful scrub changes */ 5173126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 5174126258Smlaier } 5175126258Smlaier 5176126258Smlaier return (PF_PASS); 5177126258Smlaier} 5178126258Smlaier 5179126258Smlaierint 5180130613Smlaierpf_test_state_udp(struct pf_state **state, int direction, struct pfi_kif *kif, 5181130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd) 5182126258Smlaier{ 5183126258Smlaier struct pf_state_peer *src, *dst; 5184171168Smlaier struct pf_state_cmp key; 5185126258Smlaier struct udphdr *uh = pd->hdr.udp; 5186126258Smlaier 5187126258Smlaier key.af = pd->af; 5188126258Smlaier key.proto = IPPROTO_UDP; 5189130613Smlaier if (direction == PF_IN) { 5190130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 5191130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 5192130613Smlaier key.ext.port = uh->uh_sport; 5193130613Smlaier key.gwy.port = uh->uh_dport; 5194130613Smlaier } else { 5195130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 5196130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 5197130613Smlaier key.lan.port = uh->uh_sport; 5198130613Smlaier key.ext.port = uh->uh_dport; 5199130613Smlaier } 5200126258Smlaier 5201126258Smlaier STATE_LOOKUP(); 5202126258Smlaier 5203126258Smlaier if (direction == (*state)->direction) { 5204126258Smlaier src = &(*state)->src; 5205126258Smlaier dst = &(*state)->dst; 5206126258Smlaier } else { 5207126258Smlaier src = &(*state)->dst; 5208126258Smlaier dst = &(*state)->src; 5209126258Smlaier } 5210126258Smlaier 5211126258Smlaier /* update states */ 5212126258Smlaier if (src->state < PFUDPS_SINGLE) 5213126258Smlaier src->state = PFUDPS_SINGLE; 5214126258Smlaier if (dst->state == PFUDPS_SINGLE) 5215126258Smlaier dst->state = PFUDPS_MULTIPLE; 5216126258Smlaier 5217126258Smlaier /* update expire time */ 5218126261Smlaier (*state)->expire = time_second; 5219126258Smlaier if (src->state == PFUDPS_MULTIPLE && dst->state == PFUDPS_MULTIPLE) 5220126258Smlaier (*state)->timeout = PFTM_UDP_MULTIPLE; 5221126258Smlaier else 5222126258Smlaier (*state)->timeout = PFTM_UDP_SINGLE; 5223126258Smlaier 5224126258Smlaier /* translate source/destination address, if necessary */ 5225126258Smlaier if (STATE_TRANSLATE(*state)) { 5226126258Smlaier if (direction == PF_OUT) 5227126258Smlaier pf_change_ap(pd->src, &uh->uh_sport, pd->ip_sum, 5228126258Smlaier &uh->uh_sum, &(*state)->gwy.addr, 5229126258Smlaier (*state)->gwy.port, 1, pd->af); 5230126258Smlaier else 5231126258Smlaier pf_change_ap(pd->dst, &uh->uh_dport, pd->ip_sum, 5232126258Smlaier &uh->uh_sum, &(*state)->lan.addr, 5233126258Smlaier (*state)->lan.port, 1, pd->af); 5234126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 5235126258Smlaier } 5236126258Smlaier 5237126258Smlaier return (PF_PASS); 5238126258Smlaier} 5239126258Smlaier 5240126258Smlaierint 5241130613Smlaierpf_test_state_icmp(struct pf_state **state, int direction, struct pfi_kif *kif, 5242145836Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, u_short *reason) 5243126258Smlaier{ 5244126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 5245127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 5246127629Smlaier u_int16_t *icmpsum = NULL; /* make the compiler happy */ 5247127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 5248130613Smlaier int state_icmp = 0; 5249171168Smlaier struct pf_state_cmp key; 5250126258Smlaier 5251126258Smlaier switch (pd->proto) { 5252126258Smlaier#ifdef INET 5253126258Smlaier case IPPROTO_ICMP: 5254126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 5255126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 5256126258Smlaier icmpsum = &pd->hdr.icmp->icmp_cksum; 5257126258Smlaier 5258126258Smlaier if (icmptype == ICMP_UNREACH || 5259126258Smlaier icmptype == ICMP_SOURCEQUENCH || 5260126258Smlaier icmptype == ICMP_REDIRECT || 5261126258Smlaier icmptype == ICMP_TIMXCEED || 5262126258Smlaier icmptype == ICMP_PARAMPROB) 5263126258Smlaier state_icmp++; 5264126258Smlaier break; 5265126258Smlaier#endif /* INET */ 5266126258Smlaier#ifdef INET6 5267126258Smlaier case IPPROTO_ICMPV6: 5268126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 5269126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 5270126258Smlaier icmpsum = &pd->hdr.icmp6->icmp6_cksum; 5271126258Smlaier 5272126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 5273126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 5274126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 5275126258Smlaier icmptype == ICMP6_PARAM_PROB) 5276126258Smlaier state_icmp++; 5277126258Smlaier break; 5278126258Smlaier#endif /* INET6 */ 5279126258Smlaier } 5280126258Smlaier 5281126258Smlaier if (!state_icmp) { 5282126258Smlaier 5283126258Smlaier /* 5284126258Smlaier * ICMP query/reply message not related to a TCP/UDP packet. 5285126258Smlaier * Search for an ICMP state. 5286126258Smlaier */ 5287126258Smlaier key.af = pd->af; 5288126258Smlaier key.proto = pd->proto; 5289130613Smlaier if (direction == PF_IN) { 5290130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 5291130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 5292149884Smlaier key.ext.port = 0; 5293130613Smlaier key.gwy.port = icmpid; 5294130613Smlaier } else { 5295130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 5296130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 5297130613Smlaier key.lan.port = icmpid; 5298149884Smlaier key.ext.port = 0; 5299130613Smlaier } 5300126258Smlaier 5301126258Smlaier STATE_LOOKUP(); 5302126258Smlaier 5303126261Smlaier (*state)->expire = time_second; 5304126258Smlaier (*state)->timeout = PFTM_ICMP_ERROR_REPLY; 5305126258Smlaier 5306126258Smlaier /* translate source/destination address, if necessary */ 5307149884Smlaier if (STATE_TRANSLATE(*state)) { 5308126258Smlaier if (direction == PF_OUT) { 5309126258Smlaier switch (pd->af) { 5310126258Smlaier#ifdef INET 5311126258Smlaier case AF_INET: 5312126258Smlaier pf_change_a(&saddr->v4.s_addr, 5313126258Smlaier pd->ip_sum, 5314126258Smlaier (*state)->gwy.addr.v4.s_addr, 0); 5315149884Smlaier pd->hdr.icmp->icmp_cksum = 5316149884Smlaier pf_cksum_fixup( 5317149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, 5318149884Smlaier (*state)->gwy.port, 0); 5319149884Smlaier pd->hdr.icmp->icmp_id = 5320149884Smlaier (*state)->gwy.port; 5321149884Smlaier m_copyback(m, off, ICMP_MINLEN, 5322149893Smlaier (caddr_t)pd->hdr.icmp); 5323126258Smlaier break; 5324126258Smlaier#endif /* INET */ 5325126258Smlaier#ifdef INET6 5326126258Smlaier case AF_INET6: 5327126258Smlaier pf_change_a6(saddr, 5328126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 5329126258Smlaier &(*state)->gwy.addr, 0); 5330126258Smlaier m_copyback(m, off, 5331126258Smlaier sizeof(struct icmp6_hdr), 5332126261Smlaier (caddr_t)pd->hdr.icmp6); 5333126258Smlaier break; 5334126258Smlaier#endif /* INET6 */ 5335126258Smlaier } 5336126258Smlaier } else { 5337126258Smlaier switch (pd->af) { 5338126258Smlaier#ifdef INET 5339126258Smlaier case AF_INET: 5340126258Smlaier pf_change_a(&daddr->v4.s_addr, 5341126258Smlaier pd->ip_sum, 5342126258Smlaier (*state)->lan.addr.v4.s_addr, 0); 5343149884Smlaier pd->hdr.icmp->icmp_cksum = 5344149884Smlaier pf_cksum_fixup( 5345149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, 5346149884Smlaier (*state)->lan.port, 0); 5347149884Smlaier pd->hdr.icmp->icmp_id = 5348149884Smlaier (*state)->lan.port; 5349149884Smlaier m_copyback(m, off, ICMP_MINLEN, 5350149893Smlaier (caddr_t)pd->hdr.icmp); 5351126258Smlaier break; 5352126258Smlaier#endif /* INET */ 5353126258Smlaier#ifdef INET6 5354126258Smlaier case AF_INET6: 5355126258Smlaier pf_change_a6(daddr, 5356126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 5357126258Smlaier &(*state)->lan.addr, 0); 5358126258Smlaier m_copyback(m, off, 5359126258Smlaier sizeof(struct icmp6_hdr), 5360126261Smlaier (caddr_t)pd->hdr.icmp6); 5361126258Smlaier break; 5362126258Smlaier#endif /* INET6 */ 5363126258Smlaier } 5364126258Smlaier } 5365126258Smlaier } 5366126258Smlaier 5367126258Smlaier return (PF_PASS); 5368126258Smlaier 5369126258Smlaier } else { 5370126258Smlaier /* 5371126258Smlaier * ICMP error message in response to a TCP/UDP packet. 5372126258Smlaier * Extract the inner TCP/UDP header and search for that state. 5373126258Smlaier */ 5374126258Smlaier 5375126258Smlaier struct pf_pdesc pd2; 5376126258Smlaier#ifdef INET 5377126258Smlaier struct ip h2; 5378126258Smlaier#endif /* INET */ 5379126258Smlaier#ifdef INET6 5380126258Smlaier struct ip6_hdr h2_6; 5381126258Smlaier int terminal = 0; 5382126258Smlaier#endif /* INET6 */ 5383127629Smlaier int ipoff2 = 0; /* make the compiler happy */ 5384127629Smlaier int off2 = 0; /* make the compiler happy */ 5385126258Smlaier 5386126258Smlaier pd2.af = pd->af; 5387126258Smlaier switch (pd->af) { 5388126258Smlaier#ifdef INET 5389126258Smlaier case AF_INET: 5390126258Smlaier /* offset of h2 in mbuf chain */ 5391126258Smlaier ipoff2 = off + ICMP_MINLEN; 5392126258Smlaier 5393126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2, sizeof(h2), 5394145836Smlaier NULL, reason, pd2.af)) { 5395126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5396126258Smlaier ("pf: ICMP error message too short " 5397126258Smlaier "(ip)\n")); 5398126258Smlaier return (PF_DROP); 5399126258Smlaier } 5400126258Smlaier /* 5401126258Smlaier * ICMP error messages don't refer to non-first 5402126258Smlaier * fragments 5403126258Smlaier */ 5404145836Smlaier if (h2.ip_off & htons(IP_OFFMASK)) { 5405145836Smlaier REASON_SET(reason, PFRES_FRAG); 5406126258Smlaier return (PF_DROP); 5407145836Smlaier } 5408126258Smlaier 5409126258Smlaier /* offset of protocol header that follows h2 */ 5410126258Smlaier off2 = ipoff2 + (h2.ip_hl << 2); 5411126258Smlaier 5412126258Smlaier pd2.proto = h2.ip_p; 5413126258Smlaier pd2.src = (struct pf_addr *)&h2.ip_src; 5414126258Smlaier pd2.dst = (struct pf_addr *)&h2.ip_dst; 5415126258Smlaier pd2.ip_sum = &h2.ip_sum; 5416126258Smlaier break; 5417126258Smlaier#endif /* INET */ 5418126258Smlaier#ifdef INET6 5419126258Smlaier case AF_INET6: 5420126258Smlaier ipoff2 = off + sizeof(struct icmp6_hdr); 5421126258Smlaier 5422126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2_6, sizeof(h2_6), 5423145836Smlaier NULL, reason, pd2.af)) { 5424126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5425126258Smlaier ("pf: ICMP error message too short " 5426126258Smlaier "(ip6)\n")); 5427126258Smlaier return (PF_DROP); 5428126258Smlaier } 5429126258Smlaier pd2.proto = h2_6.ip6_nxt; 5430126258Smlaier pd2.src = (struct pf_addr *)&h2_6.ip6_src; 5431126258Smlaier pd2.dst = (struct pf_addr *)&h2_6.ip6_dst; 5432126258Smlaier pd2.ip_sum = NULL; 5433126258Smlaier off2 = ipoff2 + sizeof(h2_6); 5434126258Smlaier do { 5435126258Smlaier switch (pd2.proto) { 5436126258Smlaier case IPPROTO_FRAGMENT: 5437126258Smlaier /* 5438126258Smlaier * ICMPv6 error messages for 5439126258Smlaier * non-first fragments 5440126258Smlaier */ 5441145836Smlaier REASON_SET(reason, PFRES_FRAG); 5442126258Smlaier return (PF_DROP); 5443126258Smlaier case IPPROTO_AH: 5444126258Smlaier case IPPROTO_HOPOPTS: 5445126258Smlaier case IPPROTO_ROUTING: 5446126258Smlaier case IPPROTO_DSTOPTS: { 5447126258Smlaier /* get next header and header length */ 5448126258Smlaier struct ip6_ext opt6; 5449126258Smlaier 5450126258Smlaier if (!pf_pull_hdr(m, off2, &opt6, 5451145836Smlaier sizeof(opt6), NULL, reason, 5452145836Smlaier pd2.af)) { 5453126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5454126258Smlaier ("pf: ICMPv6 short opt\n")); 5455126258Smlaier return (PF_DROP); 5456126258Smlaier } 5457126258Smlaier if (pd2.proto == IPPROTO_AH) 5458126258Smlaier off2 += (opt6.ip6e_len + 2) * 4; 5459126258Smlaier else 5460126258Smlaier off2 += (opt6.ip6e_len + 1) * 8; 5461126258Smlaier pd2.proto = opt6.ip6e_nxt; 5462126258Smlaier /* goto the next header */ 5463126258Smlaier break; 5464126258Smlaier } 5465126258Smlaier default: 5466126258Smlaier terminal++; 5467126258Smlaier break; 5468126258Smlaier } 5469126258Smlaier } while (!terminal); 5470126258Smlaier break; 5471126258Smlaier#endif /* INET6 */ 5472171168Smlaier#ifdef __FreeBSD__ 5473171168Smlaier default: 5474171168Smlaier panic("AF not supported: %d", pd->af); 5475171168Smlaier#endif 5476126258Smlaier } 5477126258Smlaier 5478126258Smlaier switch (pd2.proto) { 5479126258Smlaier case IPPROTO_TCP: { 5480126258Smlaier struct tcphdr th; 5481126258Smlaier u_int32_t seq; 5482126258Smlaier struct pf_state_peer *src, *dst; 5483126258Smlaier u_int8_t dws; 5484128129Smlaier int copyback = 0; 5485126258Smlaier 5486126258Smlaier /* 5487126258Smlaier * Only the first 8 bytes of the TCP header can be 5488126258Smlaier * expected. Don't access any TCP header fields after 5489126258Smlaier * th_seq, an ackskew test is not possible. 5490126258Smlaier */ 5491145836Smlaier if (!pf_pull_hdr(m, off2, &th, 8, NULL, reason, 5492145836Smlaier pd2.af)) { 5493126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5494126258Smlaier ("pf: ICMP error message too short " 5495126258Smlaier "(tcp)\n")); 5496126258Smlaier return (PF_DROP); 5497126258Smlaier } 5498126258Smlaier 5499126258Smlaier key.af = pd2.af; 5500126258Smlaier key.proto = IPPROTO_TCP; 5501130613Smlaier if (direction == PF_IN) { 5502130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5503130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5504130613Smlaier key.ext.port = th.th_dport; 5505130613Smlaier key.gwy.port = th.th_sport; 5506130613Smlaier } else { 5507130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5508130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5509130613Smlaier key.lan.port = th.th_dport; 5510130613Smlaier key.ext.port = th.th_sport; 5511130613Smlaier } 5512126258Smlaier 5513126258Smlaier STATE_LOOKUP(); 5514126258Smlaier 5515126258Smlaier if (direction == (*state)->direction) { 5516126258Smlaier src = &(*state)->dst; 5517126258Smlaier dst = &(*state)->src; 5518126258Smlaier } else { 5519126258Smlaier src = &(*state)->src; 5520126258Smlaier dst = &(*state)->dst; 5521126258Smlaier } 5522126258Smlaier 5523171929Sdhartmei if (src->wscale && dst->wscale) 5524126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 5525126258Smlaier else 5526126258Smlaier dws = 0; 5527126258Smlaier 5528126258Smlaier /* Demodulate sequence number */ 5529126258Smlaier seq = ntohl(th.th_seq) - src->seqdiff; 5530128129Smlaier if (src->seqdiff) { 5531128129Smlaier pf_change_a(&th.th_seq, icmpsum, 5532126258Smlaier htonl(seq), 0); 5533128129Smlaier copyback = 1; 5534128129Smlaier } 5535126258Smlaier 5536126258Smlaier if (!SEQ_GEQ(src->seqhi, seq) || 5537126258Smlaier !SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws))) { 5538126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 5539126258Smlaier printf("pf: BAD ICMP %d:%d ", 5540126258Smlaier icmptype, pd->hdr.icmp->icmp_code); 5541126258Smlaier pf_print_host(pd->src, 0, pd->af); 5542126258Smlaier printf(" -> "); 5543126258Smlaier pf_print_host(pd->dst, 0, pd->af); 5544126258Smlaier printf(" state: "); 5545126258Smlaier pf_print_state(*state); 5546126258Smlaier printf(" seq=%u\n", seq); 5547126258Smlaier } 5548145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 5549126258Smlaier return (PF_DROP); 5550126258Smlaier } 5551126258Smlaier 5552126258Smlaier if (STATE_TRANSLATE(*state)) { 5553126258Smlaier if (direction == PF_IN) { 5554126258Smlaier pf_change_icmp(pd2.src, &th.th_sport, 5555128129Smlaier daddr, &(*state)->lan.addr, 5556126258Smlaier (*state)->lan.port, NULL, 5557126258Smlaier pd2.ip_sum, icmpsum, 5558126258Smlaier pd->ip_sum, 0, pd2.af); 5559126258Smlaier } else { 5560126258Smlaier pf_change_icmp(pd2.dst, &th.th_dport, 5561126258Smlaier saddr, &(*state)->gwy.addr, 5562126258Smlaier (*state)->gwy.port, NULL, 5563126258Smlaier pd2.ip_sum, icmpsum, 5564126258Smlaier pd->ip_sum, 0, pd2.af); 5565126258Smlaier } 5566128129Smlaier copyback = 1; 5567128129Smlaier } 5568128129Smlaier 5569128129Smlaier if (copyback) { 5570126258Smlaier switch (pd2.af) { 5571126258Smlaier#ifdef INET 5572126258Smlaier case AF_INET: 5573126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5574126261Smlaier (caddr_t)pd->hdr.icmp); 5575126258Smlaier m_copyback(m, ipoff2, sizeof(h2), 5576126261Smlaier (caddr_t)&h2); 5577126258Smlaier break; 5578126258Smlaier#endif /* INET */ 5579126258Smlaier#ifdef INET6 5580126258Smlaier case AF_INET6: 5581126258Smlaier m_copyback(m, off, 5582126258Smlaier sizeof(struct icmp6_hdr), 5583126261Smlaier (caddr_t)pd->hdr.icmp6); 5584126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5585126261Smlaier (caddr_t)&h2_6); 5586126258Smlaier break; 5587126258Smlaier#endif /* INET6 */ 5588126258Smlaier } 5589126261Smlaier m_copyback(m, off2, 8, (caddr_t)&th); 5590126258Smlaier } 5591126258Smlaier 5592126258Smlaier return (PF_PASS); 5593126258Smlaier break; 5594126258Smlaier } 5595126258Smlaier case IPPROTO_UDP: { 5596126258Smlaier struct udphdr uh; 5597126258Smlaier 5598126258Smlaier if (!pf_pull_hdr(m, off2, &uh, sizeof(uh), 5599145836Smlaier NULL, reason, pd2.af)) { 5600126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5601126258Smlaier ("pf: ICMP error message too short " 5602126258Smlaier "(udp)\n")); 5603126258Smlaier return (PF_DROP); 5604126258Smlaier } 5605126258Smlaier 5606126258Smlaier key.af = pd2.af; 5607126258Smlaier key.proto = IPPROTO_UDP; 5608130613Smlaier if (direction == PF_IN) { 5609130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5610130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5611130613Smlaier key.ext.port = uh.uh_dport; 5612130613Smlaier key.gwy.port = uh.uh_sport; 5613130613Smlaier } else { 5614130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5615130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5616130613Smlaier key.lan.port = uh.uh_dport; 5617130613Smlaier key.ext.port = uh.uh_sport; 5618130613Smlaier } 5619126258Smlaier 5620126258Smlaier STATE_LOOKUP(); 5621126258Smlaier 5622126258Smlaier if (STATE_TRANSLATE(*state)) { 5623126258Smlaier if (direction == PF_IN) { 5624126258Smlaier pf_change_icmp(pd2.src, &uh.uh_sport, 5625126258Smlaier daddr, &(*state)->lan.addr, 5626126258Smlaier (*state)->lan.port, &uh.uh_sum, 5627126258Smlaier pd2.ip_sum, icmpsum, 5628126258Smlaier pd->ip_sum, 1, pd2.af); 5629126258Smlaier } else { 5630126258Smlaier pf_change_icmp(pd2.dst, &uh.uh_dport, 5631126258Smlaier saddr, &(*state)->gwy.addr, 5632126258Smlaier (*state)->gwy.port, &uh.uh_sum, 5633126258Smlaier pd2.ip_sum, icmpsum, 5634126258Smlaier pd->ip_sum, 1, pd2.af); 5635126258Smlaier } 5636126258Smlaier switch (pd2.af) { 5637126258Smlaier#ifdef INET 5638126258Smlaier case AF_INET: 5639126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5640126261Smlaier (caddr_t)pd->hdr.icmp); 5641126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5642126261Smlaier (caddr_t)&h2); 5643126258Smlaier break; 5644126258Smlaier#endif /* INET */ 5645126258Smlaier#ifdef INET6 5646126258Smlaier case AF_INET6: 5647126258Smlaier m_copyback(m, off, 5648126258Smlaier sizeof(struct icmp6_hdr), 5649126261Smlaier (caddr_t)pd->hdr.icmp6); 5650126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5651126261Smlaier (caddr_t)&h2_6); 5652126258Smlaier break; 5653126258Smlaier#endif /* INET6 */ 5654126258Smlaier } 5655126261Smlaier m_copyback(m, off2, sizeof(uh), 5656126261Smlaier (caddr_t)&uh); 5657126258Smlaier } 5658126258Smlaier 5659126258Smlaier return (PF_PASS); 5660126258Smlaier break; 5661126258Smlaier } 5662126258Smlaier#ifdef INET 5663126258Smlaier case IPPROTO_ICMP: { 5664126258Smlaier struct icmp iih; 5665126258Smlaier 5666126258Smlaier if (!pf_pull_hdr(m, off2, &iih, ICMP_MINLEN, 5667145836Smlaier NULL, reason, pd2.af)) { 5668126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5669126258Smlaier ("pf: ICMP error message too short i" 5670126258Smlaier "(icmp)\n")); 5671126258Smlaier return (PF_DROP); 5672126258Smlaier } 5673126258Smlaier 5674126258Smlaier key.af = pd2.af; 5675126258Smlaier key.proto = IPPROTO_ICMP; 5676130613Smlaier if (direction == PF_IN) { 5677130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5678130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5679149884Smlaier key.ext.port = 0; 5680130613Smlaier key.gwy.port = iih.icmp_id; 5681130613Smlaier } else { 5682130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5683130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5684130613Smlaier key.lan.port = iih.icmp_id; 5685149884Smlaier key.ext.port = 0; 5686130613Smlaier } 5687126258Smlaier 5688126258Smlaier STATE_LOOKUP(); 5689126258Smlaier 5690126258Smlaier if (STATE_TRANSLATE(*state)) { 5691126258Smlaier if (direction == PF_IN) { 5692126258Smlaier pf_change_icmp(pd2.src, &iih.icmp_id, 5693126258Smlaier daddr, &(*state)->lan.addr, 5694126258Smlaier (*state)->lan.port, NULL, 5695126258Smlaier pd2.ip_sum, icmpsum, 5696126258Smlaier pd->ip_sum, 0, AF_INET); 5697126258Smlaier } else { 5698126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp_id, 5699126258Smlaier saddr, &(*state)->gwy.addr, 5700126258Smlaier (*state)->gwy.port, NULL, 5701126258Smlaier pd2.ip_sum, icmpsum, 5702126258Smlaier pd->ip_sum, 0, AF_INET); 5703126258Smlaier } 5704126261Smlaier m_copyback(m, off, ICMP_MINLEN, 5705126261Smlaier (caddr_t)pd->hdr.icmp); 5706126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5707126261Smlaier (caddr_t)&h2); 5708126261Smlaier m_copyback(m, off2, ICMP_MINLEN, 5709126261Smlaier (caddr_t)&iih); 5710126258Smlaier } 5711126258Smlaier 5712126258Smlaier return (PF_PASS); 5713126258Smlaier break; 5714126258Smlaier } 5715126258Smlaier#endif /* INET */ 5716126258Smlaier#ifdef INET6 5717126258Smlaier case IPPROTO_ICMPV6: { 5718126258Smlaier struct icmp6_hdr iih; 5719126258Smlaier 5720126258Smlaier if (!pf_pull_hdr(m, off2, &iih, 5721145836Smlaier sizeof(struct icmp6_hdr), NULL, reason, pd2.af)) { 5722126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5723126258Smlaier ("pf: ICMP error message too short " 5724126258Smlaier "(icmp6)\n")); 5725126258Smlaier return (PF_DROP); 5726126258Smlaier } 5727126258Smlaier 5728126258Smlaier key.af = pd2.af; 5729126258Smlaier key.proto = IPPROTO_ICMPV6; 5730130613Smlaier if (direction == PF_IN) { 5731130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5732130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5733149884Smlaier key.ext.port = 0; 5734130613Smlaier key.gwy.port = iih.icmp6_id; 5735130613Smlaier } else { 5736130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5737130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5738130613Smlaier key.lan.port = iih.icmp6_id; 5739149884Smlaier key.ext.port = 0; 5740130613Smlaier } 5741126258Smlaier 5742126258Smlaier STATE_LOOKUP(); 5743126258Smlaier 5744126258Smlaier if (STATE_TRANSLATE(*state)) { 5745126258Smlaier if (direction == PF_IN) { 5746126258Smlaier pf_change_icmp(pd2.src, &iih.icmp6_id, 5747126258Smlaier daddr, &(*state)->lan.addr, 5748126258Smlaier (*state)->lan.port, NULL, 5749126258Smlaier pd2.ip_sum, icmpsum, 5750126258Smlaier pd->ip_sum, 0, AF_INET6); 5751126258Smlaier } else { 5752126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp6_id, 5753126258Smlaier saddr, &(*state)->gwy.addr, 5754126258Smlaier (*state)->gwy.port, NULL, 5755126258Smlaier pd2.ip_sum, icmpsum, 5756126258Smlaier pd->ip_sum, 0, AF_INET6); 5757126258Smlaier } 5758126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 5759126261Smlaier (caddr_t)pd->hdr.icmp6); 5760126261Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5761126261Smlaier (caddr_t)&h2_6); 5762126258Smlaier m_copyback(m, off2, sizeof(struct icmp6_hdr), 5763126261Smlaier (caddr_t)&iih); 5764126258Smlaier } 5765126258Smlaier 5766126258Smlaier return (PF_PASS); 5767126258Smlaier break; 5768126258Smlaier } 5769126258Smlaier#endif /* INET6 */ 5770126258Smlaier default: { 5771126258Smlaier key.af = pd2.af; 5772126258Smlaier key.proto = pd2.proto; 5773130613Smlaier if (direction == PF_IN) { 5774130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5775130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5776130613Smlaier key.ext.port = 0; 5777130613Smlaier key.gwy.port = 0; 5778130613Smlaier } else { 5779130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5780130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5781130613Smlaier key.lan.port = 0; 5782130613Smlaier key.ext.port = 0; 5783130613Smlaier } 5784126258Smlaier 5785126258Smlaier STATE_LOOKUP(); 5786126258Smlaier 5787126258Smlaier if (STATE_TRANSLATE(*state)) { 5788126258Smlaier if (direction == PF_IN) { 5789126258Smlaier pf_change_icmp(pd2.src, NULL, 5790126258Smlaier daddr, &(*state)->lan.addr, 5791126258Smlaier 0, NULL, 5792126258Smlaier pd2.ip_sum, icmpsum, 5793126258Smlaier pd->ip_sum, 0, pd2.af); 5794126258Smlaier } else { 5795126258Smlaier pf_change_icmp(pd2.dst, NULL, 5796126258Smlaier saddr, &(*state)->gwy.addr, 5797126258Smlaier 0, NULL, 5798126258Smlaier pd2.ip_sum, icmpsum, 5799126258Smlaier pd->ip_sum, 0, pd2.af); 5800126258Smlaier } 5801126258Smlaier switch (pd2.af) { 5802126258Smlaier#ifdef INET 5803126258Smlaier case AF_INET: 5804126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5805126261Smlaier (caddr_t)pd->hdr.icmp); 5806126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5807126261Smlaier (caddr_t)&h2); 5808126258Smlaier break; 5809126258Smlaier#endif /* INET */ 5810126258Smlaier#ifdef INET6 5811126258Smlaier case AF_INET6: 5812126258Smlaier m_copyback(m, off, 5813126258Smlaier sizeof(struct icmp6_hdr), 5814126261Smlaier (caddr_t)pd->hdr.icmp6); 5815126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5816126261Smlaier (caddr_t)&h2_6); 5817126258Smlaier break; 5818126258Smlaier#endif /* INET6 */ 5819126258Smlaier } 5820126258Smlaier } 5821126258Smlaier 5822126258Smlaier return (PF_PASS); 5823126258Smlaier break; 5824126258Smlaier } 5825126258Smlaier } 5826126258Smlaier } 5827126258Smlaier} 5828126258Smlaier 5829126258Smlaierint 5830130613Smlaierpf_test_state_other(struct pf_state **state, int direction, struct pfi_kif *kif, 5831126258Smlaier struct pf_pdesc *pd) 5832126258Smlaier{ 5833126258Smlaier struct pf_state_peer *src, *dst; 5834171168Smlaier struct pf_state_cmp key; 5835126258Smlaier 5836126258Smlaier key.af = pd->af; 5837126258Smlaier key.proto = pd->proto; 5838130613Smlaier if (direction == PF_IN) { 5839130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 5840130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 5841130613Smlaier key.ext.port = 0; 5842130613Smlaier key.gwy.port = 0; 5843130613Smlaier } else { 5844130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 5845130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 5846130613Smlaier key.lan.port = 0; 5847130613Smlaier key.ext.port = 0; 5848130613Smlaier } 5849126258Smlaier 5850126258Smlaier STATE_LOOKUP(); 5851126258Smlaier 5852126258Smlaier if (direction == (*state)->direction) { 5853126258Smlaier src = &(*state)->src; 5854126258Smlaier dst = &(*state)->dst; 5855126258Smlaier } else { 5856126258Smlaier src = &(*state)->dst; 5857126258Smlaier dst = &(*state)->src; 5858126258Smlaier } 5859126258Smlaier 5860126258Smlaier /* update states */ 5861126258Smlaier if (src->state < PFOTHERS_SINGLE) 5862126258Smlaier src->state = PFOTHERS_SINGLE; 5863126258Smlaier if (dst->state == PFOTHERS_SINGLE) 5864126258Smlaier dst->state = PFOTHERS_MULTIPLE; 5865126258Smlaier 5866126258Smlaier /* update expire time */ 5867126261Smlaier (*state)->expire = time_second; 5868126258Smlaier if (src->state == PFOTHERS_MULTIPLE && dst->state == PFOTHERS_MULTIPLE) 5869126258Smlaier (*state)->timeout = PFTM_OTHER_MULTIPLE; 5870126258Smlaier else 5871126258Smlaier (*state)->timeout = PFTM_OTHER_SINGLE; 5872126258Smlaier 5873126258Smlaier /* translate source/destination address, if necessary */ 5874126258Smlaier if (STATE_TRANSLATE(*state)) { 5875126258Smlaier if (direction == PF_OUT) 5876126258Smlaier switch (pd->af) { 5877126258Smlaier#ifdef INET 5878126258Smlaier case AF_INET: 5879126258Smlaier pf_change_a(&pd->src->v4.s_addr, 5880126258Smlaier pd->ip_sum, (*state)->gwy.addr.v4.s_addr, 5881126258Smlaier 0); 5882126258Smlaier break; 5883126258Smlaier#endif /* INET */ 5884126258Smlaier#ifdef INET6 5885126258Smlaier case AF_INET6: 5886126258Smlaier PF_ACPY(pd->src, &(*state)->gwy.addr, pd->af); 5887126258Smlaier break; 5888126258Smlaier#endif /* INET6 */ 5889126258Smlaier } 5890126258Smlaier else 5891126258Smlaier switch (pd->af) { 5892126258Smlaier#ifdef INET 5893126258Smlaier case AF_INET: 5894126258Smlaier pf_change_a(&pd->dst->v4.s_addr, 5895126258Smlaier pd->ip_sum, (*state)->lan.addr.v4.s_addr, 5896126258Smlaier 0); 5897126258Smlaier break; 5898126258Smlaier#endif /* INET */ 5899126258Smlaier#ifdef INET6 5900126258Smlaier case AF_INET6: 5901126258Smlaier PF_ACPY(pd->dst, &(*state)->lan.addr, pd->af); 5902126258Smlaier break; 5903126258Smlaier#endif /* INET6 */ 5904126258Smlaier } 5905126258Smlaier } 5906126258Smlaier 5907126258Smlaier return (PF_PASS); 5908126258Smlaier} 5909126258Smlaier 5910126258Smlaier/* 5911126258Smlaier * ipoff and off are measured from the start of the mbuf chain. 5912126258Smlaier * h must be at "ipoff" on the mbuf chain. 5913126258Smlaier */ 5914126258Smlaiervoid * 5915126258Smlaierpf_pull_hdr(struct mbuf *m, int off, void *p, int len, 5916126258Smlaier u_short *actionp, u_short *reasonp, sa_family_t af) 5917126258Smlaier{ 5918126258Smlaier switch (af) { 5919126258Smlaier#ifdef INET 5920126258Smlaier case AF_INET: { 5921126258Smlaier struct ip *h = mtod(m, struct ip *); 5922126258Smlaier u_int16_t fragoff = (ntohs(h->ip_off) & IP_OFFMASK) << 3; 5923126258Smlaier 5924126258Smlaier if (fragoff) { 5925126258Smlaier if (fragoff >= len) 5926126258Smlaier ACTION_SET(actionp, PF_PASS); 5927126258Smlaier else { 5928126258Smlaier ACTION_SET(actionp, PF_DROP); 5929126258Smlaier REASON_SET(reasonp, PFRES_FRAG); 5930126258Smlaier } 5931126258Smlaier return (NULL); 5932126258Smlaier } 5933130613Smlaier if (m->m_pkthdr.len < off + len || 5934130613Smlaier ntohs(h->ip_len) < off + len) { 5935126258Smlaier ACTION_SET(actionp, PF_DROP); 5936126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5937126258Smlaier return (NULL); 5938126258Smlaier } 5939126258Smlaier break; 5940126258Smlaier } 5941126258Smlaier#endif /* INET */ 5942126258Smlaier#ifdef INET6 5943126258Smlaier case AF_INET6: { 5944126258Smlaier struct ip6_hdr *h = mtod(m, struct ip6_hdr *); 5945126258Smlaier 5946126258Smlaier if (m->m_pkthdr.len < off + len || 5947126258Smlaier (ntohs(h->ip6_plen) + sizeof(struct ip6_hdr)) < 5948126258Smlaier (unsigned)(off + len)) { 5949126258Smlaier ACTION_SET(actionp, PF_DROP); 5950126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5951126258Smlaier return (NULL); 5952126258Smlaier } 5953126258Smlaier break; 5954126258Smlaier } 5955126258Smlaier#endif /* INET6 */ 5956126258Smlaier } 5957126258Smlaier m_copydata(m, off, len, p); 5958126258Smlaier return (p); 5959126258Smlaier} 5960126258Smlaier 5961126258Smlaierint 5962171168Smlaierpf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *kif) 5963126258Smlaier{ 5964126258Smlaier struct sockaddr_in *dst; 5965171168Smlaier int ret = 1; 5966171168Smlaier int check_mpath; 5967171168Smlaier#ifndef __FreeBSD__ 5968171168Smlaier extern int ipmultipath; 5969171168Smlaier#endif 5970145836Smlaier#ifdef INET6 5971171168Smlaier#ifndef __FreeBSD__ 5972171168Smlaier extern int ip6_multipath; 5973171168Smlaier#endif 5974145836Smlaier struct sockaddr_in6 *dst6; 5975145836Smlaier struct route_in6 ro; 5976145836Smlaier#else 5977126258Smlaier struct route ro; 5978145836Smlaier#endif 5979171168Smlaier struct radix_node *rn; 5980171168Smlaier struct rtentry *rt; 5981171168Smlaier struct ifnet *ifp; 5982126258Smlaier 5983171168Smlaier check_mpath = 0; 5984126258Smlaier bzero(&ro, sizeof(ro)); 5985145836Smlaier switch (af) { 5986145836Smlaier case AF_INET: 5987145836Smlaier dst = satosin(&ro.ro_dst); 5988145836Smlaier dst->sin_family = AF_INET; 5989145836Smlaier dst->sin_len = sizeof(*dst); 5990145836Smlaier dst->sin_addr = addr->v4; 5991171168Smlaier#ifndef __FreeBSD__ /* MULTIPATH_ROUTING */ 5992171168Smlaier if (ipmultipath) 5993171168Smlaier check_mpath = 1; 5994171168Smlaier#endif 5995145836Smlaier break; 5996145836Smlaier#ifdef INET6 5997145836Smlaier case AF_INET6: 5998145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 5999145836Smlaier dst6->sin6_family = AF_INET6; 6000145836Smlaier dst6->sin6_len = sizeof(*dst6); 6001145836Smlaier dst6->sin6_addr = addr->v6; 6002171168Smlaier#ifndef __FreeBSD__ /* MULTIPATH_ROUTING */ 6003171168Smlaier if (ip6_multipath) 6004171168Smlaier check_mpath = 1; 6005171168Smlaier#endif 6006145836Smlaier break; 6007145836Smlaier#endif /* INET6 */ 6008145836Smlaier default: 6009145836Smlaier return (0); 6010145836Smlaier } 6011145836Smlaier 6012171168Smlaier /* Skip checks for ipsec interfaces */ 6013171168Smlaier if (kif != NULL && kif->pfik_ifp->if_type == IFT_ENC) 6014171168Smlaier goto out; 6015171168Smlaier 6016127145Smlaier#ifdef __FreeBSD__ 6017178888Sjulian/* XXX MRT not always INET */ /* stick with table 0 though */ 6018178888Sjulian if (af == AF_INET) 6019186119Sqingli in_rtalloc_ign((struct route *)&ro, 0, 0); 6020178888Sjulian else 6021186119Sqingli rtalloc_ign((struct route *)&ro, 0); 6022126261Smlaier#else /* ! __FreeBSD__ */ 6023145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 6024126261Smlaier#endif 6025126258Smlaier 6026126258Smlaier if (ro.ro_rt != NULL) { 6027171168Smlaier /* No interface given, this is a no-route check */ 6028171168Smlaier if (kif == NULL) 6029171168Smlaier goto out; 6030171168Smlaier 6031171168Smlaier if (kif->pfik_ifp == NULL) { 6032171168Smlaier ret = 0; 6033171168Smlaier goto out; 6034171168Smlaier } 6035171168Smlaier 6036171168Smlaier /* Perform uRPF check if passed input interface */ 6037171168Smlaier ret = 0; 6038171168Smlaier rn = (struct radix_node *)ro.ro_rt; 6039171168Smlaier do { 6040171168Smlaier rt = (struct rtentry *)rn; 6041171168Smlaier#ifndef __FreeBSD__ /* CARPDEV */ 6042171168Smlaier if (rt->rt_ifp->if_type == IFT_CARP) 6043171168Smlaier ifp = rt->rt_ifp->if_carpdev; 6044171168Smlaier else 6045171168Smlaier#endif 6046171168Smlaier ifp = rt->rt_ifp; 6047171168Smlaier 6048171168Smlaier if (kif->pfik_ifp == ifp) 6049171168Smlaier ret = 1; 6050171168Smlaier#ifdef __FreeBSD__ /* MULTIPATH_ROUTING */ 6051171168Smlaier rn = NULL; 6052171168Smlaier#else 6053171168Smlaier rn = rn_mpath_next(rn); 6054171168Smlaier#endif 6055171168Smlaier } while (check_mpath == 1 && rn != NULL && ret == 0); 6056171168Smlaier } else 6057171168Smlaier ret = 0; 6058171168Smlaierout: 6059171168Smlaier if (ro.ro_rt != NULL) 6060126258Smlaier RTFREE(ro.ro_rt); 6061171168Smlaier return (ret); 6062145836Smlaier} 6063145836Smlaier 6064145836Smlaierint 6065145836Smlaierpf_rtlabel_match(struct pf_addr *addr, sa_family_t af, struct pf_addr_wrap *aw) 6066145836Smlaier{ 6067145836Smlaier struct sockaddr_in *dst; 6068145836Smlaier#ifdef INET6 6069145836Smlaier struct sockaddr_in6 *dst6; 6070145836Smlaier struct route_in6 ro; 6071145836Smlaier#else 6072145836Smlaier struct route ro; 6073145836Smlaier#endif 6074145836Smlaier int ret = 0; 6075145836Smlaier 6076145836Smlaier bzero(&ro, sizeof(ro)); 6077145836Smlaier switch (af) { 6078145836Smlaier case AF_INET: 6079145836Smlaier dst = satosin(&ro.ro_dst); 6080145836Smlaier dst->sin_family = AF_INET; 6081145836Smlaier dst->sin_len = sizeof(*dst); 6082145836Smlaier dst->sin_addr = addr->v4; 6083145836Smlaier break; 6084145836Smlaier#ifdef INET6 6085145836Smlaier case AF_INET6: 6086145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 6087145836Smlaier dst6->sin6_family = AF_INET6; 6088145836Smlaier dst6->sin6_len = sizeof(*dst6); 6089145836Smlaier dst6->sin6_addr = addr->v6; 6090145836Smlaier break; 6091145836Smlaier#endif /* INET6 */ 6092145836Smlaier default: 6093145836Smlaier return (0); 6094145836Smlaier } 6095145836Smlaier 6096145836Smlaier#ifdef __FreeBSD__ 6097145836Smlaier# ifdef RTF_PRCLONING 6098145836Smlaier rtalloc_ign((struct route *)&ro, (RTF_CLONING|RTF_PRCLONING)); 6099145836Smlaier# else /* !RTF_PRCLONING */ 6100178888Sjulian if (af == AF_INET) 6101186119Sqingli in_rtalloc_ign((struct route *)&ro, 0, 0); 6102178888Sjulian else 6103186119Sqingli rtalloc_ign((struct route *)&ro, 0); 6104145836Smlaier# endif 6105145836Smlaier#else /* ! __FreeBSD__ */ 6106145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 6107145836Smlaier#endif 6108145836Smlaier 6109145836Smlaier if (ro.ro_rt != NULL) { 6110145836Smlaier#ifdef __FreeBSD__ 6111145836Smlaier /* XXX_IMPORT: later */ 6112145836Smlaier#else 6113145836Smlaier if (ro.ro_rt->rt_labelid == aw->v.rtlabel) 6114145836Smlaier ret = 1; 6115145836Smlaier#endif 6116145836Smlaier RTFREE(ro.ro_rt); 6117145836Smlaier } 6118145836Smlaier 6119126258Smlaier return (ret); 6120126258Smlaier} 6121126258Smlaier 6122126258Smlaier#ifdef INET 6123126261Smlaier 6124126258Smlaiervoid 6125126258Smlaierpf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 6126171168Smlaier struct pf_state *s, struct pf_pdesc *pd) 6127126258Smlaier{ 6128126258Smlaier struct mbuf *m0, *m1; 6129126258Smlaier struct route iproute; 6130171168Smlaier struct route *ro = NULL; 6131126258Smlaier struct sockaddr_in *dst; 6132126258Smlaier struct ip *ip; 6133126258Smlaier struct ifnet *ifp = NULL; 6134126258Smlaier struct pf_addr naddr; 6135130613Smlaier struct pf_src_node *sn = NULL; 6136126258Smlaier int error = 0; 6137127145Smlaier#ifdef __FreeBSD__ 6138126261Smlaier int sw_csum; 6139126261Smlaier#endif 6140171168Smlaier#ifdef IPSEC 6141171168Smlaier struct m_tag *mtag; 6142171168Smlaier#endif /* IPSEC */ 6143126258Smlaier 6144126258Smlaier if (m == NULL || *m == NULL || r == NULL || 6145126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 6146126258Smlaier panic("pf_route: invalid parameters"); 6147126258Smlaier 6148171168Smlaier if (pd->pf_mtag->routed++ > 3) { 6149171168Smlaier m0 = *m; 6150171168Smlaier *m = NULL; 6151171168Smlaier goto bad; 6152132303Smlaier } 6153132303Smlaier 6154126258Smlaier if (r->rt == PF_DUPTO) { 6155127145Smlaier#ifdef __FreeBSD__ 6156132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 6157126261Smlaier#else 6158132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 6159126261Smlaier#endif 6160126258Smlaier return; 6161126258Smlaier } else { 6162126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 6163126258Smlaier return; 6164126258Smlaier m0 = *m; 6165126258Smlaier } 6166126258Smlaier 6167145836Smlaier if (m0->m_len < sizeof(struct ip)) { 6168145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6169145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 6170145836Smlaier goto bad; 6171145836Smlaier } 6172145836Smlaier 6173126258Smlaier ip = mtod(m0, struct ip *); 6174126258Smlaier 6175126258Smlaier ro = &iproute; 6176126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 6177126258Smlaier dst = satosin(&ro->ro_dst); 6178126258Smlaier dst->sin_family = AF_INET; 6179126258Smlaier dst->sin_len = sizeof(*dst); 6180126258Smlaier dst->sin_addr = ip->ip_dst; 6181126258Smlaier 6182126258Smlaier if (r->rt == PF_FASTROUTE) { 6183178888Sjulian in_rtalloc(ro, 0); 6184126258Smlaier if (ro->ro_rt == 0) { 6185196039Srwatson KMOD_IPSTAT_INC(ips_noroute); 6186126258Smlaier goto bad; 6187126258Smlaier } 6188126258Smlaier 6189126258Smlaier ifp = ro->ro_rt->rt_ifp; 6190126258Smlaier ro->ro_rt->rt_use++; 6191126258Smlaier 6192126258Smlaier if (ro->ro_rt->rt_flags & RTF_GATEWAY) 6193126258Smlaier dst = satosin(ro->ro_rt->rt_gateway); 6194126258Smlaier } else { 6195145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 6196145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6197145836Smlaier ("pf_route: TAILQ_EMPTY(&r->rpool.list)\n")); 6198145836Smlaier goto bad; 6199145836Smlaier } 6200126258Smlaier if (s == NULL) { 6201130613Smlaier pf_map_addr(AF_INET, r, (struct pf_addr *)&ip->ip_src, 6202130613Smlaier &naddr, NULL, &sn); 6203126258Smlaier if (!PF_AZERO(&naddr, AF_INET)) 6204126258Smlaier dst->sin_addr.s_addr = naddr.v4.s_addr; 6205130613Smlaier ifp = r->rpool.cur->kif ? 6206130613Smlaier r->rpool.cur->kif->pfik_ifp : NULL; 6207126258Smlaier } else { 6208126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET)) 6209126258Smlaier dst->sin_addr.s_addr = 6210126258Smlaier s->rt_addr.v4.s_addr; 6211130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 6212126258Smlaier } 6213126258Smlaier } 6214126258Smlaier if (ifp == NULL) 6215126258Smlaier goto bad; 6216126258Smlaier 6217130639Smlaier if (oifp != ifp) { 6218127145Smlaier#ifdef __FreeBSD__ 6219126261Smlaier PF_UNLOCK(); 6220145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 6221126261Smlaier PF_LOCK(); 6222126261Smlaier goto bad; 6223126261Smlaier } else if (m0 == NULL) { 6224126261Smlaier PF_LOCK(); 6225126261Smlaier goto done; 6226126261Smlaier } 6227126261Smlaier PF_LOCK(); 6228126261Smlaier#else 6229145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL) != PF_PASS) 6230126258Smlaier goto bad; 6231126258Smlaier else if (m0 == NULL) 6232126258Smlaier goto done; 6233126261Smlaier#endif 6234145836Smlaier if (m0->m_len < sizeof(struct ip)) { 6235145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6236145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 6237145836Smlaier goto bad; 6238145836Smlaier } 6239126258Smlaier ip = mtod(m0, struct ip *); 6240126258Smlaier } 6241126258Smlaier 6242127145Smlaier#ifdef __FreeBSD__ 6243126261Smlaier /* Copied from FreeBSD 5.1-CURRENT ip_output. */ 6244126261Smlaier m0->m_pkthdr.csum_flags |= CSUM_IP; 6245126261Smlaier sw_csum = m0->m_pkthdr.csum_flags & ~ifp->if_hwassist; 6246126261Smlaier if (sw_csum & CSUM_DELAY_DATA) { 6247126261Smlaier /* 6248126261Smlaier * XXX: in_delayed_cksum assumes HBO for ip->ip_len (at least) 6249126261Smlaier */ 6250126261Smlaier NTOHS(ip->ip_len); 6251126261Smlaier NTOHS(ip->ip_off); /* XXX: needed? */ 6252126261Smlaier in_delayed_cksum(m0); 6253126261Smlaier HTONS(ip->ip_len); 6254126261Smlaier HTONS(ip->ip_off); 6255126261Smlaier sw_csum &= ~CSUM_DELAY_DATA; 6256126261Smlaier } 6257126261Smlaier m0->m_pkthdr.csum_flags &= ifp->if_hwassist; 6258126261Smlaier 6259126261Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu || 6260126261Smlaier (ifp->if_hwassist & CSUM_FRAGMENT && 6261126261Smlaier ((ip->ip_off & htons(IP_DF)) == 0))) { 6262126261Smlaier /* 6263126261Smlaier * ip->ip_len = htons(ip->ip_len); 6264126261Smlaier * ip->ip_off = htons(ip->ip_off); 6265126261Smlaier */ 6266126261Smlaier ip->ip_sum = 0; 6267126261Smlaier if (sw_csum & CSUM_DELAY_IP) { 6268126261Smlaier /* From KAME */ 6269126261Smlaier if (ip->ip_v == IPVERSION && 6270126261Smlaier (ip->ip_hl << 2) == sizeof(*ip)) { 6271126261Smlaier ip->ip_sum = in_cksum_hdr(ip); 6272126261Smlaier } else { 6273126261Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 6274126261Smlaier } 6275126261Smlaier } 6276126261Smlaier PF_UNLOCK(); 6277191148Skmacy error = (*ifp->if_output)(ifp, m0, sintosa(dst), ro); 6278126261Smlaier PF_LOCK(); 6279126261Smlaier goto done; 6280126261Smlaier } 6281126261Smlaier 6282126261Smlaier#else 6283126258Smlaier /* Copied from ip_output. */ 6284130613Smlaier#ifdef IPSEC 6285130613Smlaier /* 6286130613Smlaier * If deferred crypto processing is needed, check that the 6287130613Smlaier * interface supports it. 6288130613Smlaier */ 6289130613Smlaier if ((mtag = m_tag_find(m0, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL)) 6290130613Smlaier != NULL && (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 6291130613Smlaier /* Notify IPsec to do its own crypto. */ 6292130613Smlaier ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 6293130613Smlaier goto bad; 6294130613Smlaier } 6295130613Smlaier#endif /* IPSEC */ 6296130613Smlaier 6297130613Smlaier /* Catch routing changes wrt. hardware checksumming for TCP or UDP. */ 6298171168Smlaier if (m0->m_pkthdr.csum_flags & M_TCPV4_CSUM_OUT) { 6299130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_TCPv4) || 6300130613Smlaier ifp->if_bridge != NULL) { 6301130613Smlaier in_delayed_cksum(m0); 6302171168Smlaier m0->m_pkthdr.csum_flags &= ~M_TCPV4_CSUM_OUT; /* Clear */ 6303130613Smlaier } 6304171168Smlaier } else if (m0->m_pkthdr.csum_flags & M_UDPV4_CSUM_OUT) { 6305130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_UDPv4) || 6306130613Smlaier ifp->if_bridge != NULL) { 6307130613Smlaier in_delayed_cksum(m0); 6308171168Smlaier m0->m_pkthdr.csum_flags &= ~M_UDPV4_CSUM_OUT; /* Clear */ 6309130613Smlaier } 6310130613Smlaier } 6311130613Smlaier 6312126258Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu) { 6313126258Smlaier if ((ifp->if_capabilities & IFCAP_CSUM_IPv4) && 6314126258Smlaier ifp->if_bridge == NULL) { 6315171168Smlaier m0->m_pkthdr.csum_flags |= M_IPV4_CSUM_OUT; 6316196039Srwatson KMOD_IPSTAT_INC(ips_outhwcsum); 6317126258Smlaier } else { 6318126258Smlaier ip->ip_sum = 0; 6319126258Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 6320126258Smlaier } 6321126258Smlaier /* Update relevant hardware checksum stats for TCP/UDP */ 6322171168Smlaier if (m0->m_pkthdr.csum_flags & M_TCPV4_CSUM_OUT) 6323196039Srwatson KMOD_TCPSTAT_INC(tcps_outhwcsum); 6324171168Smlaier else if (m0->m_pkthdr.csum_flags & M_UDPV4_CSUM_OUT) 6325196039Srwatson KMOD_UDPSTAT_INC(udps_outhwcsum); 6326126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), NULL); 6327126258Smlaier goto done; 6328126258Smlaier } 6329126261Smlaier#endif 6330126258Smlaier /* 6331126258Smlaier * Too large for interface; fragment if possible. 6332126258Smlaier * Must be able to put at least 8 bytes per fragment. 6333126258Smlaier */ 6334126258Smlaier if (ip->ip_off & htons(IP_DF)) { 6335196039Srwatson KMOD_IPSTAT_INC(ips_cantfrag); 6336126258Smlaier if (r->rt != PF_DUPTO) { 6337127145Smlaier#ifdef __FreeBSD__ 6338126261Smlaier /* icmp_error() expects host byte ordering */ 6339126261Smlaier NTOHS(ip->ip_len); 6340126261Smlaier NTOHS(ip->ip_off); 6341126261Smlaier PF_UNLOCK(); 6342126258Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 6343145886Smlaier ifp->if_mtu); 6344145874Smlaier PF_LOCK(); 6345145874Smlaier#else 6346145874Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 6347171168Smlaier ifp->if_mtu); 6348126261Smlaier#endif 6349126258Smlaier goto done; 6350126258Smlaier } else 6351126258Smlaier goto bad; 6352126258Smlaier } 6353126258Smlaier 6354126258Smlaier m1 = m0; 6355127145Smlaier#ifdef __FreeBSD__ 6356126261Smlaier /* 6357126261Smlaier * XXX: is cheaper + less error prone than own function 6358126261Smlaier */ 6359126261Smlaier NTOHS(ip->ip_len); 6360126261Smlaier NTOHS(ip->ip_off); 6361126261Smlaier error = ip_fragment(ip, &m0, ifp->if_mtu, ifp->if_hwassist, sw_csum); 6362126261Smlaier#else 6363126258Smlaier error = ip_fragment(m0, ifp, ifp->if_mtu); 6364126261Smlaier#endif 6365127531Smlaier if (error) { 6366127531Smlaier#ifndef __FreeBSD__ /* ip_fragment does not do m_freem() on FreeBSD */ 6367127531Smlaier m0 = NULL; 6368126261Smlaier#endif 6369126258Smlaier goto bad; 6370127531Smlaier } 6371126258Smlaier 6372126258Smlaier for (m0 = m1; m0; m0 = m1) { 6373126258Smlaier m1 = m0->m_nextpkt; 6374126258Smlaier m0->m_nextpkt = 0; 6375127145Smlaier#ifdef __FreeBSD__ 6376126261Smlaier if (error == 0) { 6377126261Smlaier PF_UNLOCK(); 6378126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 6379126261Smlaier NULL); 6380126261Smlaier PF_LOCK(); 6381126261Smlaier } else 6382126261Smlaier#else 6383126258Smlaier if (error == 0) 6384126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 6385126258Smlaier NULL); 6386126258Smlaier else 6387126261Smlaier#endif 6388126258Smlaier m_freem(m0); 6389126258Smlaier } 6390126258Smlaier 6391126258Smlaier if (error == 0) 6392196039Srwatson KMOD_IPSTAT_INC(ips_fragmented); 6393126258Smlaier 6394126258Smlaierdone: 6395126258Smlaier if (r->rt != PF_DUPTO) 6396126258Smlaier *m = NULL; 6397126258Smlaier if (ro == &iproute && ro->ro_rt) 6398126258Smlaier RTFREE(ro->ro_rt); 6399126258Smlaier return; 6400126258Smlaier 6401126258Smlaierbad: 6402126258Smlaier m_freem(m0); 6403126258Smlaier goto done; 6404126258Smlaier} 6405126258Smlaier#endif /* INET */ 6406126258Smlaier 6407126258Smlaier#ifdef INET6 6408126258Smlaiervoid 6409126258Smlaierpf_route6(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 6410171168Smlaier struct pf_state *s, struct pf_pdesc *pd) 6411126258Smlaier{ 6412126258Smlaier struct mbuf *m0; 6413126258Smlaier struct route_in6 ip6route; 6414126258Smlaier struct route_in6 *ro; 6415126258Smlaier struct sockaddr_in6 *dst; 6416126258Smlaier struct ip6_hdr *ip6; 6417126258Smlaier struct ifnet *ifp = NULL; 6418126258Smlaier struct pf_addr naddr; 6419130613Smlaier struct pf_src_node *sn = NULL; 6420126258Smlaier int error = 0; 6421126258Smlaier 6422126258Smlaier if (m == NULL || *m == NULL || r == NULL || 6423126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 6424126258Smlaier panic("pf_route6: invalid parameters"); 6425126258Smlaier 6426171168Smlaier if (pd->pf_mtag->routed++ > 3) { 6427171168Smlaier m0 = *m; 6428171168Smlaier *m = NULL; 6429171168Smlaier goto bad; 6430132303Smlaier } 6431132303Smlaier 6432126258Smlaier if (r->rt == PF_DUPTO) { 6433127145Smlaier#ifdef __FreeBSD__ 6434132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 6435126261Smlaier#else 6436132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 6437126261Smlaier#endif 6438126258Smlaier return; 6439126258Smlaier } else { 6440126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 6441126258Smlaier return; 6442126258Smlaier m0 = *m; 6443126258Smlaier } 6444126258Smlaier 6445145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 6446145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6447145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 6448145836Smlaier goto bad; 6449145836Smlaier } 6450126258Smlaier ip6 = mtod(m0, struct ip6_hdr *); 6451126258Smlaier 6452126258Smlaier ro = &ip6route; 6453126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 6454126258Smlaier dst = (struct sockaddr_in6 *)&ro->ro_dst; 6455126258Smlaier dst->sin6_family = AF_INET6; 6456126258Smlaier dst->sin6_len = sizeof(*dst); 6457126258Smlaier dst->sin6_addr = ip6->ip6_dst; 6458126258Smlaier 6459171168Smlaier /* Cheat. XXX why only in the v6 case??? */ 6460126258Smlaier if (r->rt == PF_FASTROUTE) { 6461127145Smlaier#ifdef __FreeBSD__ 6462132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 6463126261Smlaier PF_UNLOCK(); 6464126261Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL, NULL); 6465126261Smlaier PF_LOCK(); 6466126261Smlaier#else 6467132280Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 6468132280Smlaier if (mtag == NULL) 6469132280Smlaier goto bad; 6470132280Smlaier m_tag_prepend(m0, mtag); 6471171168Smlaier pd->pf_mtag->flags |= PF_TAG_GENERATED; 6472126258Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL); 6473126261Smlaier#endif 6474126258Smlaier return; 6475126258Smlaier } 6476126258Smlaier 6477145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 6478145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6479145836Smlaier ("pf_route6: TAILQ_EMPTY(&r->rpool.list)\n")); 6480145836Smlaier goto bad; 6481145836Smlaier } 6482126258Smlaier if (s == NULL) { 6483130613Smlaier pf_map_addr(AF_INET6, r, (struct pf_addr *)&ip6->ip6_src, 6484130613Smlaier &naddr, NULL, &sn); 6485126258Smlaier if (!PF_AZERO(&naddr, AF_INET6)) 6486126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 6487126258Smlaier &naddr, AF_INET6); 6488130613Smlaier ifp = r->rpool.cur->kif ? r->rpool.cur->kif->pfik_ifp : NULL; 6489126258Smlaier } else { 6490126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET6)) 6491126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 6492126258Smlaier &s->rt_addr, AF_INET6); 6493130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 6494126258Smlaier } 6495126258Smlaier if (ifp == NULL) 6496126258Smlaier goto bad; 6497126258Smlaier 6498126258Smlaier if (oifp != ifp) { 6499127145Smlaier#ifdef __FreeBSD__ 6500132303Smlaier PF_UNLOCK(); 6501145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 6502126261Smlaier PF_LOCK(); 6503132303Smlaier goto bad; 6504132303Smlaier } else if (m0 == NULL) { 6505132303Smlaier PF_LOCK(); 6506132303Smlaier goto done; 6507132303Smlaier } 6508132303Smlaier PF_LOCK(); 6509126261Smlaier#else 6510145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL) != PF_PASS) 6511132303Smlaier goto bad; 6512132303Smlaier else if (m0 == NULL) 6513132303Smlaier goto done; 6514126261Smlaier#endif 6515145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 6516145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6517145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 6518145836Smlaier goto bad; 6519145836Smlaier } 6520132303Smlaier ip6 = mtod(m0, struct ip6_hdr *); 6521126258Smlaier } 6522126258Smlaier 6523126258Smlaier /* 6524126258Smlaier * If the packet is too large for the outgoing interface, 6525126258Smlaier * send back an icmp6 error. 6526126258Smlaier */ 6527171168Smlaier if (IN6_IS_SCOPE_EMBED(&dst->sin6_addr)) 6528126258Smlaier dst->sin6_addr.s6_addr16[1] = htons(ifp->if_index); 6529126258Smlaier if ((u_long)m0->m_pkthdr.len <= ifp->if_mtu) { 6530127145Smlaier#ifdef __FreeBSD__ 6531126261Smlaier PF_UNLOCK(); 6532126261Smlaier#endif 6533126258Smlaier error = nd6_output(ifp, ifp, m0, dst, NULL); 6534127145Smlaier#ifdef __FreeBSD__ 6535126261Smlaier PF_LOCK(); 6536126261Smlaier#endif 6537126258Smlaier } else { 6538126258Smlaier in6_ifstat_inc(ifp, ifs6_in_toobig); 6539127145Smlaier#ifdef __FreeBSD__ 6540126261Smlaier if (r->rt != PF_DUPTO) { 6541126261Smlaier PF_UNLOCK(); 6542126261Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6543126261Smlaier PF_LOCK(); 6544126261Smlaier } else 6545126261Smlaier#else 6546126258Smlaier if (r->rt != PF_DUPTO) 6547126258Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6548126258Smlaier else 6549126261Smlaier#endif 6550126258Smlaier goto bad; 6551126258Smlaier } 6552126258Smlaier 6553126258Smlaierdone: 6554126258Smlaier if (r->rt != PF_DUPTO) 6555126258Smlaier *m = NULL; 6556126258Smlaier return; 6557126258Smlaier 6558126258Smlaierbad: 6559126258Smlaier m_freem(m0); 6560126258Smlaier goto done; 6561126258Smlaier} 6562126258Smlaier#endif /* INET6 */ 6563126258Smlaier 6564126258Smlaier 6565127145Smlaier#ifdef __FreeBSD__ 6566126258Smlaier/* 6567132566Smlaier * FreeBSD supports cksum offloads for the following drivers. 6568137413Sru * em(4), fxp(4), ixgb(4), lge(4), ndis(4), nge(4), re(4), 6569132566Smlaier * ti(4), txp(4), xl(4) 6570132566Smlaier * 6571132566Smlaier * CSUM_DATA_VALID | CSUM_PSEUDO_HDR : 6572132566Smlaier * network driver performed cksum including pseudo header, need to verify 6573132566Smlaier * csum_data 6574132566Smlaier * CSUM_DATA_VALID : 6575132566Smlaier * network driver performed cksum, needs to additional pseudo header 6576132566Smlaier * cksum computation with partial csum_data(i.e. lack of H/W support for 6577132566Smlaier * pseudo header, for instance hme(4), sk(4) and possibly gem(4)) 6578132566Smlaier * 6579132566Smlaier * After validating the cksum of packet, set both flag CSUM_DATA_VALID and 6580132566Smlaier * CSUM_PSEUDO_HDR in order to avoid recomputation of the cksum in upper 6581132566Smlaier * TCP/UDP layer. 6582132566Smlaier * Also, set csum_data to 0xffff to force cksum validation. 6583126261Smlaier */ 6584126261Smlaierint 6585126261Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, sa_family_t af) 6586126261Smlaier{ 6587126261Smlaier u_int16_t sum = 0; 6588126261Smlaier int hw_assist = 0; 6589126261Smlaier struct ip *ip; 6590126261Smlaier 6591126261Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6592126261Smlaier return (1); 6593126261Smlaier if (m->m_pkthdr.len < off + len) 6594126261Smlaier return (1); 6595126261Smlaier 6596126261Smlaier switch (p) { 6597126261Smlaier case IPPROTO_TCP: 6598126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6599126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6600126261Smlaier sum = m->m_pkthdr.csum_data; 6601126261Smlaier } else { 6602126261Smlaier ip = mtod(m, struct ip *); 6603126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6604135078Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6605135078Smlaier m->m_pkthdr.csum_data + IPPROTO_TCP)); 6606126261Smlaier } 6607126261Smlaier sum ^= 0xffff; 6608126261Smlaier ++hw_assist; 6609126261Smlaier } 6610126261Smlaier break; 6611126261Smlaier case IPPROTO_UDP: 6612126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6613126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6614126261Smlaier sum = m->m_pkthdr.csum_data; 6615126261Smlaier } else { 6616126261Smlaier ip = mtod(m, struct ip *); 6617126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6618126261Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6619126261Smlaier m->m_pkthdr.csum_data + IPPROTO_UDP)); 6620126261Smlaier } 6621126261Smlaier sum ^= 0xffff; 6622126261Smlaier ++hw_assist; 6623126261Smlaier } 6624126261Smlaier break; 6625126261Smlaier case IPPROTO_ICMP: 6626126261Smlaier#ifdef INET6 6627126261Smlaier case IPPROTO_ICMPV6: 6628126261Smlaier#endif /* INET6 */ 6629126261Smlaier break; 6630126261Smlaier default: 6631126261Smlaier return (1); 6632126261Smlaier } 6633126261Smlaier 6634126261Smlaier if (!hw_assist) { 6635126261Smlaier switch (af) { 6636126261Smlaier case AF_INET: 6637126261Smlaier if (p == IPPROTO_ICMP) { 6638126261Smlaier if (m->m_len < off) 6639126261Smlaier return (1); 6640126261Smlaier m->m_data += off; 6641126261Smlaier m->m_len -= off; 6642126261Smlaier sum = in_cksum(m, len); 6643126261Smlaier m->m_data -= off; 6644126261Smlaier m->m_len += off; 6645126261Smlaier } else { 6646126261Smlaier if (m->m_len < sizeof(struct ip)) 6647126261Smlaier return (1); 6648126261Smlaier sum = in4_cksum(m, p, off, len); 6649126261Smlaier } 6650126261Smlaier break; 6651126261Smlaier#ifdef INET6 6652126261Smlaier case AF_INET6: 6653126261Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6654126261Smlaier return (1); 6655126261Smlaier sum = in6_cksum(m, p, off, len); 6656126261Smlaier break; 6657126261Smlaier#endif /* INET6 */ 6658126261Smlaier default: 6659126261Smlaier return (1); 6660126261Smlaier } 6661126261Smlaier } 6662126261Smlaier if (sum) { 6663126261Smlaier switch (p) { 6664126261Smlaier case IPPROTO_TCP: 6665183550Szec { 6666196039Srwatson KMOD_TCPSTAT_INC(tcps_rcvbadsum); 6667126261Smlaier break; 6668183550Szec } 6669126261Smlaier case IPPROTO_UDP: 6670183550Szec { 6671196039Srwatson KMOD_UDPSTAT_INC(udps_badsum); 6672126261Smlaier break; 6673183550Szec } 6674126261Smlaier case IPPROTO_ICMP: 6675183550Szec { 6676196039Srwatson KMOD_ICMPSTAT_INC(icps_checksum); 6677126261Smlaier break; 6678183550Szec } 6679126261Smlaier#ifdef INET6 6680126261Smlaier case IPPROTO_ICMPV6: 6681183550Szec { 6682196039Srwatson KMOD_ICMP6STAT_INC(icp6s_checksum); 6683126261Smlaier break; 6684183550Szec } 6685126261Smlaier#endif /* INET6 */ 6686126261Smlaier } 6687126261Smlaier return (1); 6688132566Smlaier } else { 6689132566Smlaier if (p == IPPROTO_TCP || p == IPPROTO_UDP) { 6690132566Smlaier m->m_pkthdr.csum_flags |= 6691132566Smlaier (CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 6692132566Smlaier m->m_pkthdr.csum_data = 0xffff; 6693132566Smlaier } 6694126261Smlaier } 6695126261Smlaier return (0); 6696126261Smlaier} 6697171168Smlaier#else /* !__FreeBSD__ */ 6698126261Smlaier/* 6699126258Smlaier * check protocol (tcp/udp/icmp/icmp6) checksum and set mbuf flag 6700126258Smlaier * off is the offset where the protocol header starts 6701126258Smlaier * len is the total length of protocol header plus payload 6702126258Smlaier * returns 0 when the checksum is valid, otherwise returns 1. 6703126258Smlaier */ 6704126258Smlaierint 6705130613Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, 6706130613Smlaier sa_family_t af) 6707126258Smlaier{ 6708126258Smlaier u_int16_t flag_ok, flag_bad; 6709126258Smlaier u_int16_t sum; 6710126258Smlaier 6711126258Smlaier switch (p) { 6712126258Smlaier case IPPROTO_TCP: 6713126258Smlaier flag_ok = M_TCP_CSUM_IN_OK; 6714126258Smlaier flag_bad = M_TCP_CSUM_IN_BAD; 6715126258Smlaier break; 6716126258Smlaier case IPPROTO_UDP: 6717126258Smlaier flag_ok = M_UDP_CSUM_IN_OK; 6718126258Smlaier flag_bad = M_UDP_CSUM_IN_BAD; 6719126258Smlaier break; 6720126258Smlaier case IPPROTO_ICMP: 6721126258Smlaier#ifdef INET6 6722126258Smlaier case IPPROTO_ICMPV6: 6723126258Smlaier#endif /* INET6 */ 6724126258Smlaier flag_ok = flag_bad = 0; 6725126258Smlaier break; 6726126258Smlaier default: 6727126258Smlaier return (1); 6728126258Smlaier } 6729171168Smlaier if (m->m_pkthdr.csum_flags & flag_ok) 6730126258Smlaier return (0); 6731171168Smlaier if (m->m_pkthdr.csum_flags & flag_bad) 6732126258Smlaier return (1); 6733126258Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6734126258Smlaier return (1); 6735126258Smlaier if (m->m_pkthdr.len < off + len) 6736126258Smlaier return (1); 6737145836Smlaier switch (af) { 6738145836Smlaier#ifdef INET 6739126258Smlaier case AF_INET: 6740126258Smlaier if (p == IPPROTO_ICMP) { 6741126258Smlaier if (m->m_len < off) 6742126258Smlaier return (1); 6743126258Smlaier m->m_data += off; 6744126258Smlaier m->m_len -= off; 6745126258Smlaier sum = in_cksum(m, len); 6746126258Smlaier m->m_data -= off; 6747126258Smlaier m->m_len += off; 6748126258Smlaier } else { 6749126258Smlaier if (m->m_len < sizeof(struct ip)) 6750126258Smlaier return (1); 6751126258Smlaier sum = in4_cksum(m, p, off, len); 6752126258Smlaier } 6753126258Smlaier break; 6754145836Smlaier#endif /* INET */ 6755126258Smlaier#ifdef INET6 6756126258Smlaier case AF_INET6: 6757126258Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6758126258Smlaier return (1); 6759126258Smlaier sum = in6_cksum(m, p, off, len); 6760126258Smlaier break; 6761126258Smlaier#endif /* INET6 */ 6762126258Smlaier default: 6763126258Smlaier return (1); 6764126258Smlaier } 6765126258Smlaier if (sum) { 6766171168Smlaier m->m_pkthdr.csum_flags |= flag_bad; 6767126258Smlaier switch (p) { 6768126258Smlaier case IPPROTO_TCP: 6769196039Srwatson KMOD_TCPSTAT_INC(tcps_rcvbadsum); 6770126258Smlaier break; 6771126258Smlaier case IPPROTO_UDP: 6772196039Srwatson KMOD_UDPSTAT_INC(udps_badsum); 6773126258Smlaier break; 6774126258Smlaier case IPPROTO_ICMP: 6775196039Srwatson KMOD_ICMPSTAT_INC(icps_checksum); 6776126258Smlaier break; 6777126258Smlaier#ifdef INET6 6778126258Smlaier case IPPROTO_ICMPV6: 6779196039Srwatson KMOD_ICMP6STAT_INC(icp6s_checksum); 6780126258Smlaier break; 6781126258Smlaier#endif /* INET6 */ 6782126258Smlaier } 6783126258Smlaier return (1); 6784126258Smlaier } 6785171168Smlaier m->m_pkthdr.csum_flags |= flag_ok; 6786126258Smlaier return (0); 6787126258Smlaier} 6788171168Smlaier#endif /* __FreeBSD__ */ 6789126258Smlaier 6790126258Smlaier#ifdef INET 6791126258Smlaierint 6792135920Smlaier#ifdef __FreeBSD__ 6793145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6794145836Smlaier struct ether_header *eh, struct inpcb *inp) 6795135920Smlaier#else 6796145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6797145836Smlaier struct ether_header *eh) 6798135920Smlaier#endif 6799126258Smlaier{ 6800130613Smlaier struct pfi_kif *kif; 6801130613Smlaier u_short action, reason = 0, log = 0; 6802130613Smlaier struct mbuf *m = *m0; 6803130613Smlaier struct ip *h = NULL; /* make the compiler happy */ 6804130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6805130613Smlaier struct pf_state *s = NULL; 6806130613Smlaier struct pf_ruleset *ruleset = NULL; 6807130613Smlaier struct pf_pdesc pd; 6808130613Smlaier int off, dirndx, pqid = 0; 6809126258Smlaier 6810127145Smlaier#ifdef __FreeBSD__ 6811126261Smlaier PF_LOCK(); 6812126261Smlaier#endif 6813171168Smlaier if (!pf_status.running) 6814127145Smlaier#ifdef __FreeBSD__ 6815171168Smlaier { 6816126261Smlaier PF_UNLOCK(); 6817126261Smlaier#endif 6818171168Smlaier return (PF_PASS); 6819171168Smlaier#ifdef __FreeBSD__ 6820126261Smlaier } 6821171168Smlaier#endif 6822126258Smlaier 6823171168Smlaier memset(&pd, 0, sizeof(pd)); 6824171168Smlaier if ((pd.pf_mtag = pf_get_mtag(m)) == NULL) { 6825145836Smlaier#ifdef __FreeBSD__ 6826171168Smlaier PF_UNLOCK(); 6827171168Smlaier#endif 6828171168Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6829171168Smlaier ("pf_test: pf_get_mtag returned NULL\n")); 6830171168Smlaier return (PF_DROP); 6831171168Smlaier } 6832171168Smlaier#ifdef __FreeBSD__ 6833171168Smlaier if (m->m_flags & M_SKIP_FIREWALL) { 6834171168Smlaier PF_UNLOCK(); 6835171168Smlaier return (PF_PASS); 6836171168Smlaier } 6837171168Smlaier#else 6838171168Smlaier if (pd.pf_mtag->flags & PF_TAG_GENERATED) 6839171168Smlaier return (PF_PASS); 6840171168Smlaier#endif 6841171168Smlaier 6842171168Smlaier#ifdef __FreeBSD__ 6843145836Smlaier /* XXX_IMPORT: later */ 6844145836Smlaier#else 6845145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 6846145836Smlaier ifp = ifp->if_carpdev; 6847145836Smlaier#endif 6848145836Smlaier 6849171168Smlaier kif = (struct pfi_kif *)ifp->if_pf_kif; 6850130613Smlaier if (kif == NULL) { 6851130613Smlaier#ifdef __FreeBSD__ 6852130613Smlaier PF_UNLOCK(); 6853130613Smlaier#endif 6854145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6855145836Smlaier ("pf_test: kif == NULL, if_xname %s\n", ifp->if_xname)); 6856130613Smlaier return (PF_DROP); 6857130613Smlaier } 6858145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 6859145836Smlaier#ifdef __FreeBSD__ 6860145836Smlaier PF_UNLOCK(); 6861145836Smlaier#endif 6862145836Smlaier return (PF_PASS); 6863145836Smlaier } 6864130613Smlaier 6865130613Smlaier#ifdef __FreeBSD__ 6866126261Smlaier M_ASSERTPKTHDR(m); 6867126261Smlaier#else 6868126258Smlaier#ifdef DIAGNOSTIC 6869126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6870126258Smlaier panic("non-M_PKTHDR is passed to pf_test"); 6871145836Smlaier#endif /* DIAGNOSTIC */ 6872145836Smlaier#endif /* __FreeBSD__ */ 6873126258Smlaier 6874126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6875126258Smlaier action = PF_DROP; 6876126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6877126258Smlaier log = 1; 6878126258Smlaier goto done; 6879126258Smlaier } 6880126258Smlaier 6881126258Smlaier /* We do IP header normalization and packet reassembly here */ 6882145836Smlaier if (pf_normalize_ip(m0, dir, kif, &reason, &pd) != PF_PASS) { 6883126258Smlaier action = PF_DROP; 6884126258Smlaier goto done; 6885126258Smlaier } 6886126258Smlaier m = *m0; 6887126258Smlaier h = mtod(m, struct ip *); 6888126258Smlaier 6889126258Smlaier off = h->ip_hl << 2; 6890126258Smlaier if (off < (int)sizeof(*h)) { 6891126258Smlaier action = PF_DROP; 6892126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6893126258Smlaier log = 1; 6894126258Smlaier goto done; 6895126258Smlaier } 6896126258Smlaier 6897126258Smlaier pd.src = (struct pf_addr *)&h->ip_src; 6898126258Smlaier pd.dst = (struct pf_addr *)&h->ip_dst; 6899130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET); 6900126258Smlaier pd.ip_sum = &h->ip_sum; 6901126258Smlaier pd.proto = h->ip_p; 6902126258Smlaier pd.af = AF_INET; 6903126258Smlaier pd.tos = h->ip_tos; 6904126258Smlaier pd.tot_len = ntohs(h->ip_len); 6905145836Smlaier pd.eh = eh; 6906126258Smlaier 6907126258Smlaier /* handle fragments that didn't get reassembled by normalization */ 6908126258Smlaier if (h->ip_off & htons(IP_MF | IP_OFFMASK)) { 6909130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6910126258Smlaier &pd, &a, &ruleset); 6911126258Smlaier goto done; 6912126258Smlaier } 6913126258Smlaier 6914126258Smlaier switch (h->ip_p) { 6915126258Smlaier 6916126258Smlaier case IPPROTO_TCP: { 6917126258Smlaier struct tcphdr th; 6918126258Smlaier 6919126258Smlaier pd.hdr.tcp = &th; 6920126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6921126258Smlaier &action, &reason, AF_INET)) { 6922126258Smlaier log = action != PF_PASS; 6923126258Smlaier goto done; 6924126258Smlaier } 6925126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6926126258Smlaier ntohs(h->ip_len) - off, IPPROTO_TCP, AF_INET)) { 6927171168Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6928126258Smlaier action = PF_DROP; 6929126258Smlaier goto done; 6930126258Smlaier } 6931126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6932126258Smlaier if ((th.th_flags & TH_ACK) && pd.p_len == 0) 6933126258Smlaier pqid = 1; 6934130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6935126258Smlaier if (action == PF_DROP) 6936130613Smlaier goto done; 6937130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6938126258Smlaier &reason); 6939126258Smlaier if (action == PF_PASS) { 6940130613Smlaier#if NPFSYNC 6941130613Smlaier pfsync_update_state(s); 6942145836Smlaier#endif /* NPFSYNC */ 6943126258Smlaier r = s->rule.ptr; 6944130613Smlaier a = s->anchor.ptr; 6945126258Smlaier log = s->log; 6946126258Smlaier } else if (s == NULL) 6947135920Smlaier#ifdef __FreeBSD__ 6948130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6949145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6950135920Smlaier#else 6951135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6952145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6953135920Smlaier#endif 6954126258Smlaier break; 6955126258Smlaier } 6956126258Smlaier 6957126258Smlaier case IPPROTO_UDP: { 6958126258Smlaier struct udphdr uh; 6959126258Smlaier 6960126258Smlaier pd.hdr.udp = &uh; 6961126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6962126258Smlaier &action, &reason, AF_INET)) { 6963126258Smlaier log = action != PF_PASS; 6964126258Smlaier goto done; 6965126258Smlaier } 6966126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6967126258Smlaier off, ntohs(h->ip_len) - off, IPPROTO_UDP, AF_INET)) { 6968126258Smlaier action = PF_DROP; 6969171168Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6970126258Smlaier goto done; 6971126258Smlaier } 6972130613Smlaier if (uh.uh_dport == 0 || 6973130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6974130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6975130613Smlaier action = PF_DROP; 6976171168Smlaier REASON_SET(&reason, PFRES_SHORT); 6977130613Smlaier goto done; 6978130613Smlaier } 6979130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6980126258Smlaier if (action == PF_PASS) { 6981130613Smlaier#if NPFSYNC 6982130613Smlaier pfsync_update_state(s); 6983145836Smlaier#endif /* NPFSYNC */ 6984126258Smlaier r = s->rule.ptr; 6985126258Smlaier a = s->anchor.ptr; 6986126258Smlaier log = s->log; 6987126258Smlaier } else if (s == NULL) 6988135920Smlaier#ifdef __FreeBSD__ 6989130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6990145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6991135920Smlaier#else 6992135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 6993145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6994135920Smlaier#endif 6995126258Smlaier break; 6996126258Smlaier } 6997126258Smlaier 6998126258Smlaier case IPPROTO_ICMP: { 6999126258Smlaier struct icmp ih; 7000126258Smlaier 7001126258Smlaier pd.hdr.icmp = &ih; 7002126258Smlaier if (!pf_pull_hdr(m, off, &ih, ICMP_MINLEN, 7003126258Smlaier &action, &reason, AF_INET)) { 7004126258Smlaier log = action != PF_PASS; 7005126258Smlaier goto done; 7006126258Smlaier } 7007126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 7008126258Smlaier ntohs(h->ip_len) - off, IPPROTO_ICMP, AF_INET)) { 7009126258Smlaier action = PF_DROP; 7010171168Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 7011126258Smlaier goto done; 7012126258Smlaier } 7013145836Smlaier action = pf_test_state_icmp(&s, dir, kif, m, off, h, &pd, 7014145836Smlaier &reason); 7015126258Smlaier if (action == PF_PASS) { 7016130613Smlaier#if NPFSYNC 7017130613Smlaier pfsync_update_state(s); 7018145836Smlaier#endif /* NPFSYNC */ 7019126258Smlaier r = s->rule.ptr; 7020126258Smlaier a = s->anchor.ptr; 7021126258Smlaier log = s->log; 7022126258Smlaier } else if (s == NULL) 7023145836Smlaier#ifdef __FreeBSD__ 7024130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 7025145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 7026145836Smlaier#else 7027145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 7028145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 7029145836Smlaier#endif 7030126258Smlaier break; 7031126258Smlaier } 7032126258Smlaier 7033126258Smlaier default: 7034130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 7035126258Smlaier if (action == PF_PASS) { 7036130613Smlaier#if NPFSYNC 7037130613Smlaier pfsync_update_state(s); 7038145836Smlaier#endif /* NPFSYNC */ 7039126258Smlaier r = s->rule.ptr; 7040126258Smlaier a = s->anchor.ptr; 7041126258Smlaier log = s->log; 7042126258Smlaier } else if (s == NULL) 7043145836Smlaier#ifdef __FreeBSD__ 7044130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7045145836Smlaier &pd, &a, &ruleset, NULL); 7046145836Smlaier#else 7047145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7048145836Smlaier &pd, &a, &ruleset, &ipintrq); 7049145836Smlaier#endif 7050126258Smlaier break; 7051126258Smlaier } 7052126258Smlaier 7053126258Smlaierdone: 7054126258Smlaier if (action == PF_PASS && h->ip_hl > 5 && 7055126258Smlaier !((s && s->allow_opts) || r->allow_opts)) { 7056126258Smlaier action = PF_DROP; 7057145836Smlaier REASON_SET(&reason, PFRES_IPOPTIONS); 7058126258Smlaier log = 1; 7059126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 7060126258Smlaier ("pf: dropping packet with ip options\n")); 7061126258Smlaier } 7062126258Smlaier 7063171168Smlaier if ((s && s->tag) || r->rtableid) 7064171168Smlaier pf_tag_packet(m, pd.pf_mtag, s ? s->tag : 0, r->rtableid); 7065145836Smlaier 7066126258Smlaier#ifdef ALTQ 7067126258Smlaier if (action == PF_PASS && r->qid) { 7068171168Smlaier if (pqid || (pd.tos & IPTOS_LOWDELAY)) 7069171168Smlaier pd.pf_mtag->qid = r->pqid; 7070171168Smlaier else 7071171168Smlaier pd.pf_mtag->qid = r->qid; 7072171168Smlaier /* add hints for ecn */ 7073171168Smlaier pd.pf_mtag->af = AF_INET; 7074171168Smlaier pd.pf_mtag->hdr = h; 7075126258Smlaier } 7076145836Smlaier#endif /* ALTQ */ 7077126258Smlaier 7078130613Smlaier /* 7079130613Smlaier * connections redirected to loopback should not match sockets 7080130613Smlaier * bound specifically to loopback due to security implications, 7081130613Smlaier * see tcp_input() and in_pcblookup_listen(). 7082130613Smlaier */ 7083130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 7084130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 7085130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 7086130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 7087171168Smlaier (ntohl(pd.dst->v4.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) 7088171168Smlaier pd.pf_mtag->flags |= PF_TAG_TRANSLATE_LOCALHOST; 7089171168Smlaier 7090171168Smlaier if (log) { 7091171168Smlaier struct pf_rule *lr; 7092171168Smlaier 7093171168Smlaier if (s != NULL && s->nat_rule.ptr != NULL && 7094171168Smlaier s->nat_rule.ptr->log & PF_LOG_ALL) 7095171168Smlaier lr = s->nat_rule.ptr; 7096171168Smlaier else 7097171168Smlaier lr = r; 7098171168Smlaier PFLOG_PACKET(kif, h, m, AF_INET, dir, reason, lr, a, ruleset, 7099171168Smlaier &pd); 7100130613Smlaier } 7101130613Smlaier 7102130613Smlaier kif->pfik_bytes[0][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 7103130613Smlaier kif->pfik_packets[0][dir == PF_OUT][action != PF_PASS]++; 7104130613Smlaier 7105130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 7106171168Smlaier dirndx = (dir == PF_OUT); 7107171168Smlaier r->packets[dirndx]++; 7108171168Smlaier r->bytes[dirndx] += pd.tot_len; 7109130613Smlaier if (a != NULL) { 7110171168Smlaier a->packets[dirndx]++; 7111171168Smlaier a->bytes[dirndx] += pd.tot_len; 7112130613Smlaier } 7113130613Smlaier if (s != NULL) { 7114130613Smlaier if (s->nat_rule.ptr != NULL) { 7115171168Smlaier s->nat_rule.ptr->packets[dirndx]++; 7116171168Smlaier s->nat_rule.ptr->bytes[dirndx] += pd.tot_len; 7117130613Smlaier } 7118130613Smlaier if (s->src_node != NULL) { 7119171168Smlaier s->src_node->packets[dirndx]++; 7120171168Smlaier s->src_node->bytes[dirndx] += pd.tot_len; 7121130613Smlaier } 7122130613Smlaier if (s->nat_src_node != NULL) { 7123171168Smlaier s->nat_src_node->packets[dirndx]++; 7124171168Smlaier s->nat_src_node->bytes[dirndx] += pd.tot_len; 7125130613Smlaier } 7126171168Smlaier dirndx = (dir == s->direction) ? 0 : 1; 7127171168Smlaier s->packets[dirndx]++; 7128171168Smlaier s->bytes[dirndx] += pd.tot_len; 7129130613Smlaier } 7130130613Smlaier tr = r; 7131130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 7132130613Smlaier if (nr != NULL) { 7133130613Smlaier struct pf_addr *x; 7134130613Smlaier /* 7135130613Smlaier * XXX: we need to make sure that the addresses 7136130613Smlaier * passed to pfr_update_stats() are the same than 7137130613Smlaier * the addresses used during matching (pfr_match) 7138130613Smlaier */ 7139130613Smlaier if (r == &pf_default_rule) { 7140130613Smlaier tr = nr; 7141130613Smlaier x = (s == NULL || s->direction == dir) ? 7142130613Smlaier &pd.baddr : &pd.naddr; 7143130613Smlaier } else 7144130613Smlaier x = (s == NULL || s->direction == dir) ? 7145130613Smlaier &pd.naddr : &pd.baddr; 7146130613Smlaier if (x == &pd.baddr || s == NULL) { 7147130613Smlaier /* we need to change the address */ 7148130613Smlaier if (dir == PF_OUT) 7149130613Smlaier pd.src = x; 7150130613Smlaier else 7151130613Smlaier pd.dst = x; 7152130613Smlaier } 7153130613Smlaier } 7154130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 7155130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 7156130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 7157130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7158145836Smlaier tr->src.neg); 7159130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 7160130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 7161130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 7162130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7163145836Smlaier tr->dst.neg); 7164130613Smlaier } 7165130613Smlaier 7166130613Smlaier 7167126258Smlaier if (action == PF_SYNPROXY_DROP) { 7168126258Smlaier m_freem(*m0); 7169126258Smlaier *m0 = NULL; 7170126258Smlaier action = PF_PASS; 7171126258Smlaier } else if (r->rt) 7172126258Smlaier /* pf_route can free the mbuf causing *m0 to become NULL */ 7173171168Smlaier pf_route(m0, r, dir, ifp, s, &pd); 7174126258Smlaier 7175127145Smlaier#ifdef __FreeBSD__ 7176126261Smlaier PF_UNLOCK(); 7177126261Smlaier#endif 7178126261Smlaier 7179126258Smlaier return (action); 7180126258Smlaier} 7181126258Smlaier#endif /* INET */ 7182126258Smlaier 7183126258Smlaier#ifdef INET6 7184126258Smlaierint 7185135920Smlaier#ifdef __FreeBSD__ 7186145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 7187145836Smlaier struct ether_header *eh, struct inpcb *inp) 7188135920Smlaier#else 7189145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 7190145836Smlaier struct ether_header *eh) 7191135920Smlaier#endif 7192126258Smlaier{ 7193130613Smlaier struct pfi_kif *kif; 7194130613Smlaier u_short action, reason = 0, log = 0; 7195171168Smlaier struct mbuf *m = *m0, *n = NULL; 7196171168Smlaier struct ip6_hdr *h; 7197130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 7198130613Smlaier struct pf_state *s = NULL; 7199130613Smlaier struct pf_ruleset *ruleset = NULL; 7200130613Smlaier struct pf_pdesc pd; 7201169843Sdhartmei int off, terminal = 0, dirndx, rh_cnt = 0; 7202126258Smlaier 7203127145Smlaier#ifdef __FreeBSD__ 7204126261Smlaier PF_LOCK(); 7205126261Smlaier#endif 7206126261Smlaier 7207171168Smlaier if (!pf_status.running) 7208127145Smlaier#ifdef __FreeBSD__ 7209171168Smlaier { 7210126261Smlaier PF_UNLOCK(); 7211126261Smlaier#endif 7212126258Smlaier return (PF_PASS); 7213171168Smlaier#ifdef __FreeBSD__ 7214126261Smlaier } 7215171168Smlaier#endif 7216126258Smlaier 7217171168Smlaier memset(&pd, 0, sizeof(pd)); 7218171168Smlaier if ((pd.pf_mtag = pf_get_mtag(m)) == NULL) { 7219145836Smlaier#ifdef __FreeBSD__ 7220171168Smlaier PF_UNLOCK(); 7221171168Smlaier#endif 7222171168Smlaier DPFPRINTF(PF_DEBUG_URGENT, 7223171168Smlaier ("pf_test6: pf_get_mtag returned NULL\n")); 7224171168Smlaier return (PF_DROP); 7225171168Smlaier } 7226171168Smlaier if (pd.pf_mtag->flags & PF_TAG_GENERATED) 7227171168Smlaier return (PF_PASS); 7228171168Smlaier 7229171168Smlaier#ifdef __FreeBSD__ 7230145836Smlaier /* XXX_IMPORT: later */ 7231145836Smlaier#else 7232145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 7233145836Smlaier ifp = ifp->if_carpdev; 7234145836Smlaier#endif 7235145836Smlaier 7236171168Smlaier kif = (struct pfi_kif *)ifp->if_pf_kif; 7237130613Smlaier if (kif == NULL) { 7238130613Smlaier#ifdef __FreeBSD__ 7239130613Smlaier PF_UNLOCK(); 7240130613Smlaier#endif 7241145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 7242145836Smlaier ("pf_test6: kif == NULL, if_xname %s\n", ifp->if_xname)); 7243130613Smlaier return (PF_DROP); 7244130613Smlaier } 7245145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 7246145836Smlaier#ifdef __FreeBSD__ 7247145836Smlaier PF_UNLOCK(); 7248145836Smlaier#endif 7249145836Smlaier return (PF_PASS); 7250145836Smlaier } 7251130613Smlaier 7252130613Smlaier#ifdef __FreeBSD__ 7253126261Smlaier M_ASSERTPKTHDR(m); 7254126261Smlaier#else 7255126258Smlaier#ifdef DIAGNOSTIC 7256126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 7257145836Smlaier panic("non-M_PKTHDR is passed to pf_test6"); 7258145836Smlaier#endif /* DIAGNOSTIC */ 7259126258Smlaier#endif 7260126258Smlaier 7261171168Smlaier#ifdef __FreeBSD__ 7262171168Smlaier h = NULL; /* make the compiler happy */ 7263171168Smlaier#endif 7264171168Smlaier 7265126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 7266126258Smlaier action = PF_DROP; 7267126258Smlaier REASON_SET(&reason, PFRES_SHORT); 7268126258Smlaier log = 1; 7269126258Smlaier goto done; 7270126258Smlaier } 7271126258Smlaier 7272126258Smlaier /* We do IP header normalization and packet reassembly here */ 7273145836Smlaier if (pf_normalize_ip6(m0, dir, kif, &reason, &pd) != PF_PASS) { 7274126258Smlaier action = PF_DROP; 7275126258Smlaier goto done; 7276126258Smlaier } 7277126258Smlaier m = *m0; 7278126258Smlaier h = mtod(m, struct ip6_hdr *); 7279126258Smlaier 7280169843Sdhartmei#if 1 7281169843Sdhartmei /* 7282169843Sdhartmei * we do not support jumbogram yet. if we keep going, zero ip6_plen 7283169843Sdhartmei * will do something bad, so drop the packet for now. 7284169843Sdhartmei */ 7285169843Sdhartmei if (htons(h->ip6_plen) == 0) { 7286169843Sdhartmei action = PF_DROP; 7287169843Sdhartmei REASON_SET(&reason, PFRES_NORM); /*XXX*/ 7288169843Sdhartmei goto done; 7289169843Sdhartmei } 7290169843Sdhartmei#endif 7291169843Sdhartmei 7292126258Smlaier pd.src = (struct pf_addr *)&h->ip6_src; 7293126258Smlaier pd.dst = (struct pf_addr *)&h->ip6_dst; 7294130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET6); 7295126258Smlaier pd.ip_sum = NULL; 7296126258Smlaier pd.af = AF_INET6; 7297126258Smlaier pd.tos = 0; 7298126258Smlaier pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); 7299145836Smlaier pd.eh = eh; 7300126258Smlaier 7301126258Smlaier off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); 7302126258Smlaier pd.proto = h->ip6_nxt; 7303126258Smlaier do { 7304126258Smlaier switch (pd.proto) { 7305126258Smlaier case IPPROTO_FRAGMENT: 7306130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 7307126258Smlaier &pd, &a, &ruleset); 7308126258Smlaier if (action == PF_DROP) 7309126258Smlaier REASON_SET(&reason, PFRES_FRAG); 7310126258Smlaier goto done; 7311169843Sdhartmei case IPPROTO_ROUTING: { 7312169843Sdhartmei struct ip6_rthdr rthdr; 7313169843Sdhartmei 7314169843Sdhartmei if (rh_cnt++) { 7315169843Sdhartmei DPFPRINTF(PF_DEBUG_MISC, 7316169843Sdhartmei ("pf: IPv6 more than one rthdr\n")); 7317169843Sdhartmei action = PF_DROP; 7318169843Sdhartmei REASON_SET(&reason, PFRES_IPOPTIONS); 7319169843Sdhartmei log = 1; 7320169843Sdhartmei goto done; 7321169843Sdhartmei } 7322169843Sdhartmei if (!pf_pull_hdr(m, off, &rthdr, sizeof(rthdr), NULL, 7323169843Sdhartmei &reason, pd.af)) { 7324169843Sdhartmei DPFPRINTF(PF_DEBUG_MISC, 7325169843Sdhartmei ("pf: IPv6 short rthdr\n")); 7326169843Sdhartmei action = PF_DROP; 7327169843Sdhartmei REASON_SET(&reason, PFRES_SHORT); 7328169843Sdhartmei log = 1; 7329169843Sdhartmei goto done; 7330169843Sdhartmei } 7331169843Sdhartmei if (rthdr.ip6r_type == IPV6_RTHDR_TYPE_0) { 7332169843Sdhartmei DPFPRINTF(PF_DEBUG_MISC, 7333169843Sdhartmei ("pf: IPv6 rthdr0\n")); 7334169843Sdhartmei action = PF_DROP; 7335169843Sdhartmei REASON_SET(&reason, PFRES_IPOPTIONS); 7336169843Sdhartmei log = 1; 7337169843Sdhartmei goto done; 7338169843Sdhartmei } 7339169843Sdhartmei /* fallthrough */ 7340169843Sdhartmei } 7341126258Smlaier case IPPROTO_AH: 7342126258Smlaier case IPPROTO_HOPOPTS: 7343126258Smlaier case IPPROTO_DSTOPTS: { 7344126258Smlaier /* get next header and header length */ 7345126258Smlaier struct ip6_ext opt6; 7346126258Smlaier 7347126258Smlaier if (!pf_pull_hdr(m, off, &opt6, sizeof(opt6), 7348145836Smlaier NULL, &reason, pd.af)) { 7349126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 7350126258Smlaier ("pf: IPv6 short opt\n")); 7351126258Smlaier action = PF_DROP; 7352126258Smlaier log = 1; 7353126258Smlaier goto done; 7354126258Smlaier } 7355126258Smlaier if (pd.proto == IPPROTO_AH) 7356126258Smlaier off += (opt6.ip6e_len + 2) * 4; 7357126258Smlaier else 7358126258Smlaier off += (opt6.ip6e_len + 1) * 8; 7359126258Smlaier pd.proto = opt6.ip6e_nxt; 7360126258Smlaier /* goto the next header */ 7361126258Smlaier break; 7362126258Smlaier } 7363126258Smlaier default: 7364126258Smlaier terminal++; 7365126258Smlaier break; 7366126258Smlaier } 7367126258Smlaier } while (!terminal); 7368126258Smlaier 7369171168Smlaier /* if there's no routing header, use unmodified mbuf for checksumming */ 7370171168Smlaier if (!n) 7371171168Smlaier n = m; 7372171168Smlaier 7373126258Smlaier switch (pd.proto) { 7374126258Smlaier 7375126258Smlaier case IPPROTO_TCP: { 7376126258Smlaier struct tcphdr th; 7377126258Smlaier 7378126258Smlaier pd.hdr.tcp = &th; 7379126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 7380126258Smlaier &action, &reason, AF_INET6)) { 7381126258Smlaier log = action != PF_PASS; 7382126258Smlaier goto done; 7383126258Smlaier } 7384171168Smlaier if (dir == PF_IN && pf_check_proto_cksum(n, off, 7385138387Sdhartmei ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 7386138387Sdhartmei IPPROTO_TCP, AF_INET6)) { 7387126258Smlaier action = PF_DROP; 7388145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 7389126258Smlaier goto done; 7390126258Smlaier } 7391126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 7392130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 7393126258Smlaier if (action == PF_DROP) 7394130613Smlaier goto done; 7395130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 7396126258Smlaier &reason); 7397126258Smlaier if (action == PF_PASS) { 7398130613Smlaier#if NPFSYNC 7399130613Smlaier pfsync_update_state(s); 7400145836Smlaier#endif /* NPFSYNC */ 7401126258Smlaier r = s->rule.ptr; 7402130613Smlaier a = s->anchor.ptr; 7403126258Smlaier log = s->log; 7404126258Smlaier } else if (s == NULL) 7405135920Smlaier#ifdef __FreeBSD__ 7406130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 7407145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 7408135920Smlaier#else 7409135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 7410145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 7411135920Smlaier#endif 7412126258Smlaier break; 7413126258Smlaier } 7414126258Smlaier 7415126258Smlaier case IPPROTO_UDP: { 7416126258Smlaier struct udphdr uh; 7417126258Smlaier 7418126258Smlaier pd.hdr.udp = &uh; 7419126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 7420126258Smlaier &action, &reason, AF_INET6)) { 7421126258Smlaier log = action != PF_PASS; 7422126258Smlaier goto done; 7423126258Smlaier } 7424171168Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(n, 7425138387Sdhartmei off, ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 7426138387Sdhartmei IPPROTO_UDP, AF_INET6)) { 7427126258Smlaier action = PF_DROP; 7428145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 7429126258Smlaier goto done; 7430126258Smlaier } 7431130613Smlaier if (uh.uh_dport == 0 || 7432130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 7433130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 7434130613Smlaier action = PF_DROP; 7435171168Smlaier REASON_SET(&reason, PFRES_SHORT); 7436130613Smlaier goto done; 7437130613Smlaier } 7438130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 7439126258Smlaier if (action == PF_PASS) { 7440130613Smlaier#if NPFSYNC 7441130613Smlaier pfsync_update_state(s); 7442145836Smlaier#endif /* NPFSYNC */ 7443126258Smlaier r = s->rule.ptr; 7444130613Smlaier a = s->anchor.ptr; 7445126258Smlaier log = s->log; 7446126258Smlaier } else if (s == NULL) 7447135920Smlaier#ifdef __FreeBSD__ 7448130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 7449145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 7450135920Smlaier#else 7451135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 7452145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 7453135920Smlaier#endif 7454126258Smlaier break; 7455126258Smlaier } 7456126258Smlaier 7457126258Smlaier case IPPROTO_ICMPV6: { 7458126258Smlaier struct icmp6_hdr ih; 7459126258Smlaier 7460126258Smlaier pd.hdr.icmp6 = &ih; 7461126258Smlaier if (!pf_pull_hdr(m, off, &ih, sizeof(ih), 7462126258Smlaier &action, &reason, AF_INET6)) { 7463126258Smlaier log = action != PF_PASS; 7464126258Smlaier goto done; 7465126258Smlaier } 7466171168Smlaier if (dir == PF_IN && pf_check_proto_cksum(n, off, 7467145836Smlaier ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 7468138387Sdhartmei IPPROTO_ICMPV6, AF_INET6)) { 7469126258Smlaier action = PF_DROP; 7470145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 7471126258Smlaier goto done; 7472126258Smlaier } 7473130613Smlaier action = pf_test_state_icmp(&s, dir, kif, 7474145836Smlaier m, off, h, &pd, &reason); 7475126258Smlaier if (action == PF_PASS) { 7476130613Smlaier#if NPFSYNC 7477130613Smlaier pfsync_update_state(s); 7478145836Smlaier#endif /* NPFSYNC */ 7479126258Smlaier r = s->rule.ptr; 7480130613Smlaier a = s->anchor.ptr; 7481126258Smlaier log = s->log; 7482126258Smlaier } else if (s == NULL) 7483145836Smlaier#ifdef __FreeBSD__ 7484130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 7485145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 7486145836Smlaier#else 7487145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 7488145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 7489145836Smlaier#endif 7490126258Smlaier break; 7491126258Smlaier } 7492126258Smlaier 7493126258Smlaier default: 7494130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 7495130613Smlaier if (action == PF_PASS) { 7496145836Smlaier#if NPFSYNC 7497145836Smlaier pfsync_update_state(s); 7498145836Smlaier#endif /* NPFSYNC */ 7499130613Smlaier r = s->rule.ptr; 7500130613Smlaier a = s->anchor.ptr; 7501130613Smlaier log = s->log; 7502130613Smlaier } else if (s == NULL) 7503145836Smlaier#ifdef __FreeBSD__ 7504130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7505145836Smlaier &pd, &a, &ruleset, NULL); 7506145836Smlaier#else 7507145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7508145836Smlaier &pd, &a, &ruleset, &ip6intrq); 7509145836Smlaier#endif 7510126258Smlaier break; 7511126258Smlaier } 7512126258Smlaier 7513126258Smlaierdone: 7514169843Sdhartmei /* handle dangerous IPv6 extension headers. */ 7515169843Sdhartmei if (action == PF_PASS && rh_cnt && 7516169843Sdhartmei !((s && s->allow_opts) || r->allow_opts)) { 7517169843Sdhartmei action = PF_DROP; 7518169843Sdhartmei REASON_SET(&reason, PFRES_IPOPTIONS); 7519169843Sdhartmei log = 1; 7520169843Sdhartmei DPFPRINTF(PF_DEBUG_MISC, 7521169843Sdhartmei ("pf: dropping packet with dangerous v6 headers\n")); 7522169843Sdhartmei } 7523126258Smlaier 7524171168Smlaier if ((s && s->tag) || r->rtableid) 7525171168Smlaier pf_tag_packet(m, pd.pf_mtag, s ? s->tag : 0, r->rtableid); 7526145836Smlaier 7527126258Smlaier#ifdef ALTQ 7528126258Smlaier if (action == PF_PASS && r->qid) { 7529171168Smlaier if (pd.tos & IPTOS_LOWDELAY) 7530171168Smlaier pd.pf_mtag->qid = r->pqid; 7531171168Smlaier else 7532171168Smlaier pd.pf_mtag->qid = r->qid; 7533171168Smlaier /* add hints for ecn */ 7534171168Smlaier pd.pf_mtag->af = AF_INET6; 7535171168Smlaier pd.pf_mtag->hdr = h; 7536126258Smlaier } 7537145836Smlaier#endif /* ALTQ */ 7538126258Smlaier 7539130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 7540130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 7541130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 7542130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 7543171168Smlaier IN6_IS_ADDR_LOOPBACK(&pd.dst->v6)) 7544171168Smlaier pd.pf_mtag->flags |= PF_TAG_TRANSLATE_LOCALHOST; 7545171168Smlaier 7546171168Smlaier if (log) { 7547171168Smlaier struct pf_rule *lr; 7548171168Smlaier 7549171168Smlaier if (s != NULL && s->nat_rule.ptr != NULL && 7550171168Smlaier s->nat_rule.ptr->log & PF_LOG_ALL) 7551171168Smlaier lr = s->nat_rule.ptr; 7552171168Smlaier else 7553171168Smlaier lr = r; 7554171168Smlaier PFLOG_PACKET(kif, h, m, AF_INET6, dir, reason, lr, a, ruleset, 7555171168Smlaier &pd); 7556130613Smlaier } 7557130613Smlaier 7558130613Smlaier kif->pfik_bytes[1][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 7559130613Smlaier kif->pfik_packets[1][dir == PF_OUT][action != PF_PASS]++; 7560130613Smlaier 7561130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 7562171168Smlaier dirndx = (dir == PF_OUT); 7563171168Smlaier r->packets[dirndx]++; 7564171168Smlaier r->bytes[dirndx] += pd.tot_len; 7565130613Smlaier if (a != NULL) { 7566171168Smlaier a->packets[dirndx]++; 7567171168Smlaier a->bytes[dirndx] += pd.tot_len; 7568130613Smlaier } 7569130613Smlaier if (s != NULL) { 7570130613Smlaier if (s->nat_rule.ptr != NULL) { 7571171168Smlaier s->nat_rule.ptr->packets[dirndx]++; 7572171168Smlaier s->nat_rule.ptr->bytes[dirndx] += pd.tot_len; 7573130613Smlaier } 7574130613Smlaier if (s->src_node != NULL) { 7575171168Smlaier s->src_node->packets[dirndx]++; 7576171168Smlaier s->src_node->bytes[dirndx] += pd.tot_len; 7577130613Smlaier } 7578130613Smlaier if (s->nat_src_node != NULL) { 7579171168Smlaier s->nat_src_node->packets[dirndx]++; 7580171168Smlaier s->nat_src_node->bytes[dirndx] += pd.tot_len; 7581130613Smlaier } 7582171168Smlaier dirndx = (dir == s->direction) ? 0 : 1; 7583171168Smlaier s->packets[dirndx]++; 7584171168Smlaier s->bytes[dirndx] += pd.tot_len; 7585130613Smlaier } 7586130613Smlaier tr = r; 7587130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 7588130613Smlaier if (nr != NULL) { 7589130613Smlaier struct pf_addr *x; 7590130613Smlaier /* 7591130613Smlaier * XXX: we need to make sure that the addresses 7592130613Smlaier * passed to pfr_update_stats() are the same than 7593130613Smlaier * the addresses used during matching (pfr_match) 7594130613Smlaier */ 7595130613Smlaier if (r == &pf_default_rule) { 7596130613Smlaier tr = nr; 7597130613Smlaier x = (s == NULL || s->direction == dir) ? 7598130613Smlaier &pd.baddr : &pd.naddr; 7599130613Smlaier } else { 7600130613Smlaier x = (s == NULL || s->direction == dir) ? 7601130613Smlaier &pd.naddr : &pd.baddr; 7602130613Smlaier } 7603130613Smlaier if (x == &pd.baddr || s == NULL) { 7604130613Smlaier if (dir == PF_OUT) 7605130613Smlaier pd.src = x; 7606130613Smlaier else 7607130613Smlaier pd.dst = x; 7608130613Smlaier } 7609130613Smlaier } 7610130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 7611130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 7612130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 7613130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7614145836Smlaier tr->src.neg); 7615130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 7616130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 7617130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 7618130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7619145836Smlaier tr->dst.neg); 7620130613Smlaier } 7621130613Smlaier 7622130613Smlaier 7623126258Smlaier if (action == PF_SYNPROXY_DROP) { 7624126258Smlaier m_freem(*m0); 7625126258Smlaier *m0 = NULL; 7626126258Smlaier action = PF_PASS; 7627126258Smlaier } else if (r->rt) 7628126258Smlaier /* pf_route6 can free the mbuf causing *m0 to become NULL */ 7629171168Smlaier pf_route6(m0, r, dir, ifp, s, &pd); 7630126258Smlaier 7631127145Smlaier#ifdef __FreeBSD__ 7632126261Smlaier PF_UNLOCK(); 7633126261Smlaier#endif 7634126258Smlaier return (action); 7635126258Smlaier} 7636126258Smlaier#endif /* INET6 */ 7637145836Smlaier 7638145836Smlaierint 7639145836Smlaierpf_check_congestion(struct ifqueue *ifq) 7640145836Smlaier{ 7641145836Smlaier#ifdef __FreeBSD__ 7642145836Smlaier /* XXX_IMPORT: later */ 7643145836Smlaier return (0); 7644145836Smlaier#else 7645145836Smlaier if (ifq->ifq_congestion) 7646145836Smlaier return (1); 7647145836Smlaier else 7648145836Smlaier return (0); 7649145836Smlaier#endif 7650145836Smlaier} 7651