pf.c revision 163606
1126261Smlaier/* $FreeBSD: head/sys/contrib/pf/net/pf.c 163606 2006-10-22 11:52:19Z rwatson $ */ 2145836Smlaier/* $OpenBSD: pf.c,v 1.483 2005/03/15 17:38:43 dhartmei 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" 42126261Smlaier#endif 43126261Smlaier 44127145Smlaier#ifdef __FreeBSD__ 45162238Scsjp#include "opt_mac.h" 46126261Smlaier#include "opt_bpf.h" 47126261Smlaier#include "opt_pf.h" 48153110Sru 49153110Sru#ifdef DEV_BPF 50127145Smlaier#define NBPFILTER DEV_BPF 51153110Sru#else 52153110Sru#define NBPFILTER 0 53153110Sru#endif 54153110Sru 55153110Sru#ifdef DEV_PFLOG 56127145Smlaier#define NPFLOG DEV_PFLOG 57153110Sru#else 58153110Sru#define NPFLOG 0 59153110Sru#endif 60153110Sru 61153110Sru#ifdef DEV_PFSYNC 62127145Smlaier#define NPFSYNC DEV_PFSYNC 63126261Smlaier#else 64153110Sru#define NPFSYNC 0 65153110Sru#endif 66153110Sru 67153110Sru#else 68126258Smlaier#include "bpfilter.h" 69126258Smlaier#include "pflog.h" 70126258Smlaier#include "pfsync.h" 71126261Smlaier#endif 72126258Smlaier 73126258Smlaier#include <sys/param.h> 74126258Smlaier#include <sys/systm.h> 75126258Smlaier#include <sys/mbuf.h> 76126258Smlaier#include <sys/filio.h> 77126258Smlaier#include <sys/socket.h> 78126258Smlaier#include <sys/socketvar.h> 79126258Smlaier#include <sys/kernel.h> 80126258Smlaier#include <sys/time.h> 81127145Smlaier#ifdef __FreeBSD__ 82126261Smlaier#include <sys/sysctl.h> 83130613Smlaier#include <sys/endian.h> 84126261Smlaier#else 85126258Smlaier#include <sys/pool.h> 86126261Smlaier#endif 87126258Smlaier 88126258Smlaier#include <net/if.h> 89126258Smlaier#include <net/if_types.h> 90126258Smlaier#include <net/bpf.h> 91126258Smlaier#include <net/route.h> 92126258Smlaier 93126258Smlaier#include <netinet/in.h> 94126258Smlaier#include <netinet/in_var.h> 95126258Smlaier#include <netinet/in_systm.h> 96126258Smlaier#include <netinet/ip.h> 97126258Smlaier#include <netinet/ip_var.h> 98126258Smlaier#include <netinet/tcp.h> 99126258Smlaier#include <netinet/tcp_seq.h> 100126258Smlaier#include <netinet/udp.h> 101126258Smlaier#include <netinet/ip_icmp.h> 102126258Smlaier#include <netinet/in_pcb.h> 103126258Smlaier#include <netinet/tcp_timer.h> 104126258Smlaier#include <netinet/tcp_var.h> 105126258Smlaier#include <netinet/udp_var.h> 106126258Smlaier#include <netinet/icmp_var.h> 107145836Smlaier#include <netinet/if_ether.h> 108126258Smlaier 109127145Smlaier#ifndef __FreeBSD__ 110126258Smlaier#include <dev/rndvar.h> 111126261Smlaier#endif 112126258Smlaier#include <net/pfvar.h> 113126258Smlaier#include <net/if_pflog.h> 114130613Smlaier 115130613Smlaier#if NPFSYNC > 0 116126258Smlaier#include <net/if_pfsync.h> 117130613Smlaier#endif /* NPFSYNC > 0 */ 118126258Smlaier 119126258Smlaier#ifdef INET6 120126258Smlaier#include <netinet/ip6.h> 121126258Smlaier#include <netinet/in_pcb.h> 122126258Smlaier#include <netinet/icmp6.h> 123126258Smlaier#include <netinet6/nd6.h> 124127145Smlaier#ifdef __FreeBSD__ 125126261Smlaier#include <netinet6/ip6_var.h> 126126261Smlaier#include <netinet6/in6_pcb.h> 127126261Smlaier#endif 128126258Smlaier#endif /* INET6 */ 129126258Smlaier 130127145Smlaier#ifdef __FreeBSD__ 131126261Smlaier#include <machine/in_cksum.h> 132126261Smlaier#include <sys/limits.h> 133126261Smlaier#include <sys/ucred.h> 134163606Srwatson#include <security/mac/mac_framework.h> 135126258Smlaier 136126261Smlaierextern int ip_optcopy(struct ip *, struct ip *); 137126261Smlaier#endif 138126261Smlaier 139126258Smlaier#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x 140126258Smlaier 141126258Smlaier/* 142126258Smlaier * Global variables 143126258Smlaier */ 144126258Smlaier 145145836Smlaierstruct pf_anchor_global pf_anchors; 146126258Smlaierstruct pf_ruleset pf_main_ruleset; 147126258Smlaierstruct pf_altqqueue pf_altqs[2]; 148126258Smlaierstruct pf_palist pf_pabuf; 149126258Smlaierstruct pf_altqqueue *pf_altqs_active; 150126258Smlaierstruct pf_altqqueue *pf_altqs_inactive; 151126258Smlaierstruct pf_status pf_status; 152126258Smlaier 153126258Smlaieru_int32_t ticket_altqs_active; 154126258Smlaieru_int32_t ticket_altqs_inactive; 155130613Smlaierint altqs_inactive_open; 156126258Smlaieru_int32_t ticket_pabuf; 157126258Smlaier 158127145Smlaier#ifdef __FreeBSD__ 159126261Smlaierstruct callout pf_expire_to; /* expire timeout */ 160126261Smlaier#else 161126258Smlaierstruct timeout pf_expire_to; /* expire timeout */ 162126261Smlaier#endif 163126258Smlaier 164145836Smlaierstruct pf_anchor_stackframe { 165145836Smlaier struct pf_ruleset *rs; 166145836Smlaier struct pf_rule *r; 167145836Smlaier struct pf_anchor_node *parent; 168145836Smlaier struct pf_anchor *child; 169145836Smlaier} pf_anchor_stack[64]; 170126261Smlaier 171127145Smlaier#ifdef __FreeBSD__ 172130613Smlaieruma_zone_t pf_src_tree_pl, pf_rule_pl; 173126261Smlaieruma_zone_t pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 174126261Smlaier#else 175130613Smlaierstruct pool pf_src_tree_pl, pf_rule_pl; 176126258Smlaierstruct pool pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 177126261Smlaier#endif 178126258Smlaier 179126258Smlaiervoid pf_print_host(struct pf_addr *, u_int16_t, u_int8_t); 180126258Smlaier 181145836Smlaiervoid pf_init_threshold(struct pf_threshold *, u_int32_t, 182145836Smlaier u_int32_t); 183145836Smlaiervoid pf_add_threshold(struct pf_threshold *); 184145836Smlaierint pf_check_threshold(struct pf_threshold *); 185145836Smlaier 186126258Smlaiervoid pf_change_ap(struct pf_addr *, u_int16_t *, 187126258Smlaier u_int16_t *, u_int16_t *, struct pf_addr *, 188126258Smlaier u_int16_t, u_int8_t, sa_family_t); 189126258Smlaier#ifdef INET6 190126258Smlaiervoid pf_change_a6(struct pf_addr *, u_int16_t *, 191126258Smlaier struct pf_addr *, u_int8_t); 192126258Smlaier#endif /* INET6 */ 193126258Smlaiervoid pf_change_icmp(struct pf_addr *, u_int16_t *, 194126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 195126258Smlaier u_int16_t *, u_int16_t *, u_int16_t *, 196126258Smlaier u_int16_t *, u_int8_t, sa_family_t); 197162238Scsjp#ifdef __FreeBSD__ 198162238Scsjpvoid pf_send_tcp(struct mbuf *, 199162238Scsjp const struct pf_rule *, sa_family_t, 200162238Scsjp#else 201126258Smlaiervoid pf_send_tcp(const struct pf_rule *, sa_family_t, 202162238Scsjp#endif 203126258Smlaier const struct pf_addr *, const struct pf_addr *, 204126258Smlaier u_int16_t, u_int16_t, u_int32_t, u_int32_t, 205145836Smlaier u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 206145836Smlaier struct ether_header *, struct ifnet *); 207126258Smlaiervoid pf_send_icmp(struct mbuf *, u_int8_t, u_int8_t, 208126258Smlaier sa_family_t, struct pf_rule *); 209126258Smlaierstruct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *, 210130613Smlaier int, int, struct pfi_kif *, 211126258Smlaier struct pf_addr *, u_int16_t, struct pf_addr *, 212126258Smlaier u_int16_t, int); 213126258Smlaierstruct pf_rule *pf_get_translation(struct pf_pdesc *, struct mbuf *, 214130613Smlaier int, int, struct pfi_kif *, struct pf_src_node **, 215126258Smlaier struct pf_addr *, u_int16_t, 216126258Smlaier struct pf_addr *, u_int16_t, 217126258Smlaier struct pf_addr *, u_int16_t *); 218126258Smlaierint pf_test_tcp(struct pf_rule **, struct pf_state **, 219130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 220126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 221135920Smlaier#ifdef __FreeBSD__ 222145836Smlaier struct pf_ruleset **, struct ifqueue *, 223145836Smlaier struct inpcb *); 224135920Smlaier#else 225145836Smlaier struct pf_ruleset **, struct ifqueue *); 226135920Smlaier#endif 227126258Smlaierint pf_test_udp(struct pf_rule **, struct pf_state **, 228130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 229126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 230135920Smlaier#ifdef __FreeBSD__ 231145836Smlaier struct pf_ruleset **, struct ifqueue *, 232145836Smlaier struct inpcb *); 233135920Smlaier#else 234145836Smlaier struct pf_ruleset **, struct ifqueue *); 235135920Smlaier#endif 236126258Smlaierint pf_test_icmp(struct pf_rule **, struct pf_state **, 237130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 238126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 239145836Smlaier struct pf_ruleset **, struct ifqueue *); 240126258Smlaierint pf_test_other(struct pf_rule **, struct pf_state **, 241130613Smlaier int, struct pfi_kif *, struct mbuf *, int, void *, 242126258Smlaier struct pf_pdesc *, struct pf_rule **, 243145836Smlaier struct pf_ruleset **, struct ifqueue *); 244126258Smlaierint pf_test_fragment(struct pf_rule **, int, 245130613Smlaier struct pfi_kif *, struct mbuf *, void *, 246126258Smlaier struct pf_pdesc *, struct pf_rule **, 247126258Smlaier struct pf_ruleset **); 248126258Smlaierint pf_test_state_tcp(struct pf_state **, int, 249130613Smlaier struct pfi_kif *, struct mbuf *, int, 250126258Smlaier void *, struct pf_pdesc *, u_short *); 251126258Smlaierint pf_test_state_udp(struct pf_state **, int, 252130613Smlaier struct pfi_kif *, struct mbuf *, int, 253126258Smlaier void *, struct pf_pdesc *); 254126258Smlaierint pf_test_state_icmp(struct pf_state **, int, 255130613Smlaier struct pfi_kif *, struct mbuf *, int, 256145836Smlaier void *, struct pf_pdesc *, u_short *); 257126258Smlaierint pf_test_state_other(struct pf_state **, int, 258130613Smlaier struct pfi_kif *, struct pf_pdesc *); 259126258Smlaierstruct pf_tag *pf_get_tag(struct mbuf *); 260126258Smlaierint pf_match_tag(struct mbuf *, struct pf_rule *, 261145836Smlaier struct pf_tag **, int *); 262126258Smlaiervoid pf_hash(struct pf_addr *, struct pf_addr *, 263126258Smlaier struct pf_poolhashkey *, sa_family_t); 264130613Smlaierint pf_map_addr(u_int8_t, struct pf_rule *, 265126258Smlaier struct pf_addr *, struct pf_addr *, 266130613Smlaier struct pf_addr *, struct pf_src_node **); 267130613Smlaierint pf_get_sport(sa_family_t, u_int8_t, struct pf_rule *, 268126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 269130613Smlaier struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t, 270130613Smlaier struct pf_src_node **); 271126258Smlaiervoid pf_route(struct mbuf **, struct pf_rule *, int, 272126258Smlaier struct ifnet *, struct pf_state *); 273126258Smlaiervoid pf_route6(struct mbuf **, struct pf_rule *, int, 274126258Smlaier struct ifnet *, struct pf_state *); 275135920Smlaier#ifdef __FreeBSD__ 276130613Smlaierint pf_socket_lookup(uid_t *, gid_t *, 277135920Smlaier int, struct pf_pdesc *, struct inpcb *); 278135920Smlaier#else 279135920Smlaierint pf_socket_lookup(uid_t *, gid_t *, 280126258Smlaier int, struct pf_pdesc *); 281135920Smlaier#endif 282126258Smlaieru_int8_t pf_get_wscale(struct mbuf *, int, u_int16_t, 283126258Smlaier sa_family_t); 284126258Smlaieru_int16_t pf_get_mss(struct mbuf *, int, u_int16_t, 285126258Smlaier sa_family_t); 286126258Smlaieru_int16_t pf_calc_mss(struct pf_addr *, sa_family_t, 287126258Smlaier u_int16_t); 288126258Smlaiervoid pf_set_rt_ifp(struct pf_state *, 289126258Smlaier struct pf_addr *); 290126258Smlaierint pf_check_proto_cksum(struct mbuf *, int, int, 291126258Smlaier u_int8_t, sa_family_t); 292126258Smlaierint pf_addr_wrap_neq(struct pf_addr_wrap *, 293126258Smlaier struct pf_addr_wrap *); 294130613Smlaierstatic int pf_add_mbuf_tag(struct mbuf *, u_int); 295130613Smlaierstruct pf_state *pf_find_state_recurse(struct pfi_kif *, 296130613Smlaier struct pf_state *, u_int8_t); 297145836Smlaierint pf_src_connlimit(struct pf_state **); 298145836Smlaierint pf_check_congestion(struct ifqueue *); 299126258Smlaier 300127145Smlaier#ifdef __FreeBSD__ 301126261Smlaierint in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len); 302126258Smlaier 303126261Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 304145836Smlaier 305126261Smlaier#else 306130613Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX] = { 307130613Smlaier { &pf_state_pl, PFSTATE_HIWAT }, 308130613Smlaier { &pf_src_tree_pl, PFSNODE_HIWAT }, 309130613Smlaier { &pf_frent_pl, PFFRAG_FRENT_HIWAT } 310130613Smlaier}; 311126261Smlaier#endif 312126258Smlaier 313126258Smlaier#define STATE_LOOKUP() \ 314126258Smlaier do { \ 315126258Smlaier if (direction == PF_IN) \ 316145836Smlaier *state = pf_find_state_recurse( \ 317130613Smlaier kif, &key, PF_EXT_GWY); \ 318126258Smlaier else \ 319145836Smlaier *state = pf_find_state_recurse( \ 320130613Smlaier kif, &key, PF_LAN_EXT); \ 321145836Smlaier if (*state == NULL || (*state)->timeout == PFTM_PURGE) \ 322126258Smlaier return (PF_DROP); \ 323126258Smlaier if (direction == PF_OUT && \ 324126258Smlaier (((*state)->rule.ptr->rt == PF_ROUTETO && \ 325126258Smlaier (*state)->rule.ptr->direction == PF_OUT) || \ 326126258Smlaier ((*state)->rule.ptr->rt == PF_REPLYTO && \ 327126258Smlaier (*state)->rule.ptr->direction == PF_IN)) && \ 328130613Smlaier (*state)->rt_kif != NULL && \ 329130613Smlaier (*state)->rt_kif != kif) \ 330126258Smlaier return (PF_PASS); \ 331126258Smlaier } while (0) 332126258Smlaier 333126258Smlaier#define STATE_TRANSLATE(s) \ 334126258Smlaier (s)->lan.addr.addr32[0] != (s)->gwy.addr.addr32[0] || \ 335126258Smlaier ((s)->af == AF_INET6 && \ 336126258Smlaier ((s)->lan.addr.addr32[1] != (s)->gwy.addr.addr32[1] || \ 337126258Smlaier (s)->lan.addr.addr32[2] != (s)->gwy.addr.addr32[2] || \ 338126258Smlaier (s)->lan.addr.addr32[3] != (s)->gwy.addr.addr32[3])) || \ 339126258Smlaier (s)->lan.port != (s)->gwy.port 340126258Smlaier 341130613Smlaier#define BOUND_IFACE(r, k) (((r)->rule_flag & PFRULE_IFBOUND) ? (k) : \ 342130613Smlaier ((r)->rule_flag & PFRULE_GRBOUND) ? (k)->pfik_parent : \ 343130613Smlaier (k)->pfik_parent->pfik_parent) 344126258Smlaier 345145836Smlaier#define STATE_INC_COUNTERS(s) \ 346145836Smlaier do { \ 347145836Smlaier s->rule.ptr->states++; \ 348145836Smlaier if (s->anchor.ptr != NULL) \ 349145836Smlaier s->anchor.ptr->states++; \ 350145836Smlaier if (s->nat_rule.ptr != NULL) \ 351145836Smlaier s->nat_rule.ptr->states++; \ 352145836Smlaier } while (0) 353145836Smlaier 354145836Smlaier#define STATE_DEC_COUNTERS(s) \ 355145836Smlaier do { \ 356145836Smlaier if (s->nat_rule.ptr != NULL) \ 357145836Smlaier s->nat_rule.ptr->states--; \ 358145836Smlaier if (s->anchor.ptr != NULL) \ 359145836Smlaier s->anchor.ptr->states--; \ 360145836Smlaier s->rule.ptr->states--; \ 361145836Smlaier } while (0) 362145836Smlaier 363132767Skan#ifndef __FreeBSD__ 364130613Smlaierstatic __inline int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 365130613Smlaierstatic __inline int pf_state_compare_lan_ext(struct pf_state *, 366130613Smlaier struct pf_state *); 367130613Smlaierstatic __inline int pf_state_compare_ext_gwy(struct pf_state *, 368130613Smlaier struct pf_state *); 369130613Smlaierstatic __inline int pf_state_compare_id(struct pf_state *, 370130613Smlaier struct pf_state *); 371145836Smlaierstatic __inline int pf_anchor_compare(struct pf_anchor *, struct pf_anchor *); 372132767Skan#else 373132767Skanstatic int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 374132767Skanstatic int pf_state_compare_lan_ext(struct pf_state *, 375132767Skan struct pf_state *); 376132767Skanstatic int pf_state_compare_ext_gwy(struct pf_state *, 377132767Skan struct pf_state *); 378132767Skanstatic int pf_state_compare_id(struct pf_state *, 379132767Skan struct pf_state *); 380145836Smlaierstatic int pf_anchor_compare(struct pf_anchor *, struct pf_anchor *); 381132767Skan#endif 382126258Smlaier 383130613Smlaierstruct pf_src_tree tree_src_tracking; 384130613Smlaier 385130613Smlaierstruct pf_state_tree_id tree_id; 386130613Smlaierstruct pf_state_queue state_updates; 387130613Smlaier 388130613SmlaierRB_GENERATE(pf_src_tree, pf_src_node, entry, pf_src_compare); 389130613SmlaierRB_GENERATE(pf_state_tree_lan_ext, pf_state, 390130613Smlaier u.s.entry_lan_ext, pf_state_compare_lan_ext); 391130613SmlaierRB_GENERATE(pf_state_tree_ext_gwy, pf_state, 392130613Smlaier u.s.entry_ext_gwy, pf_state_compare_ext_gwy); 393130613SmlaierRB_GENERATE(pf_state_tree_id, pf_state, 394130613Smlaier u.s.entry_id, pf_state_compare_id); 395145836SmlaierRB_GENERATE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 396145836SmlaierRB_GENERATE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 397130613Smlaier 398127145Smlaier#ifdef __FreeBSD__ 399126409Smlaierstatic int 400126409Smlaier#else 401126258Smlaierstatic __inline int 402126409Smlaier#endif 403130613Smlaierpf_src_compare(struct pf_src_node *a, struct pf_src_node *b) 404126258Smlaier{ 405126258Smlaier int diff; 406126258Smlaier 407130613Smlaier if (a->rule.ptr > b->rule.ptr) 408130613Smlaier return (1); 409130613Smlaier if (a->rule.ptr < b->rule.ptr) 410130613Smlaier return (-1); 411130613Smlaier if ((diff = a->af - b->af) != 0) 412130613Smlaier return (diff); 413130613Smlaier switch (a->af) { 414130613Smlaier#ifdef INET 415130613Smlaier case AF_INET: 416130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 417130613Smlaier return (1); 418130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 419130613Smlaier return (-1); 420130613Smlaier break; 421130613Smlaier#endif /* INET */ 422130613Smlaier#ifdef INET6 423130613Smlaier case AF_INET6: 424130613Smlaier if (a->addr.addr32[3] > b->addr.addr32[3]) 425130613Smlaier return (1); 426130613Smlaier if (a->addr.addr32[3] < b->addr.addr32[3]) 427130613Smlaier return (-1); 428130613Smlaier if (a->addr.addr32[2] > b->addr.addr32[2]) 429130613Smlaier return (1); 430130613Smlaier if (a->addr.addr32[2] < b->addr.addr32[2]) 431130613Smlaier return (-1); 432130613Smlaier if (a->addr.addr32[1] > b->addr.addr32[1]) 433130613Smlaier return (1); 434130613Smlaier if (a->addr.addr32[1] < b->addr.addr32[1]) 435130613Smlaier return (-1); 436130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 437130613Smlaier return (1); 438130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 439130613Smlaier return (-1); 440130613Smlaier break; 441130613Smlaier#endif /* INET6 */ 442130613Smlaier } 443130613Smlaier return (0); 444130613Smlaier} 445130613Smlaier 446130613Smlaier#ifdef __FreeBSD__ 447130613Smlaierstatic int 448130613Smlaier#else 449130613Smlaierstatic __inline int 450130613Smlaier#endif 451130613Smlaierpf_state_compare_lan_ext(struct pf_state *a, struct pf_state *b) 452130613Smlaier{ 453130613Smlaier int diff; 454130613Smlaier 455126258Smlaier if ((diff = a->proto - b->proto) != 0) 456126258Smlaier return (diff); 457126258Smlaier if ((diff = a->af - b->af) != 0) 458126258Smlaier return (diff); 459126258Smlaier switch (a->af) { 460126258Smlaier#ifdef INET 461126258Smlaier case AF_INET: 462130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 463126258Smlaier return (1); 464130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 465126258Smlaier return (-1); 466130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 467126258Smlaier return (1); 468130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 469126258Smlaier return (-1); 470126258Smlaier break; 471126258Smlaier#endif /* INET */ 472126258Smlaier#ifdef INET6 473126258Smlaier case AF_INET6: 474130613Smlaier if (a->lan.addr.addr32[3] > b->lan.addr.addr32[3]) 475126258Smlaier return (1); 476130613Smlaier if (a->lan.addr.addr32[3] < b->lan.addr.addr32[3]) 477126258Smlaier return (-1); 478130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 479126258Smlaier return (1); 480130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 481126258Smlaier return (-1); 482130613Smlaier if (a->lan.addr.addr32[2] > b->lan.addr.addr32[2]) 483126258Smlaier return (1); 484130613Smlaier if (a->lan.addr.addr32[2] < b->lan.addr.addr32[2]) 485126258Smlaier return (-1); 486130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 487126258Smlaier return (1); 488130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 489126258Smlaier return (-1); 490130613Smlaier if (a->lan.addr.addr32[1] > b->lan.addr.addr32[1]) 491126258Smlaier return (1); 492130613Smlaier if (a->lan.addr.addr32[1] < b->lan.addr.addr32[1]) 493126258Smlaier return (-1); 494130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 495126258Smlaier return (1); 496130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 497126258Smlaier return (-1); 498130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 499126258Smlaier return (1); 500130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 501126258Smlaier return (-1); 502130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 503126258Smlaier return (1); 504130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 505126258Smlaier return (-1); 506126258Smlaier break; 507126258Smlaier#endif /* INET6 */ 508126258Smlaier } 509126258Smlaier 510130613Smlaier if ((diff = a->lan.port - b->lan.port) != 0) 511126258Smlaier return (diff); 512130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 513126258Smlaier return (diff); 514126258Smlaier 515126258Smlaier return (0); 516126258Smlaier} 517126258Smlaier 518130613Smlaier#ifdef __FreeBSD__ 519130613Smlaierstatic int 520130613Smlaier#else 521130613Smlaierstatic __inline int 522130613Smlaier#endif 523130613Smlaierpf_state_compare_ext_gwy(struct pf_state *a, struct pf_state *b) 524130613Smlaier{ 525130613Smlaier int diff; 526130613Smlaier 527130613Smlaier if ((diff = a->proto - b->proto) != 0) 528130613Smlaier return (diff); 529130613Smlaier if ((diff = a->af - b->af) != 0) 530130613Smlaier return (diff); 531130613Smlaier switch (a->af) { 532130613Smlaier#ifdef INET 533130613Smlaier case AF_INET: 534130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 535130613Smlaier return (1); 536130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 537130613Smlaier return (-1); 538130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 539130613Smlaier return (1); 540130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 541130613Smlaier return (-1); 542130613Smlaier break; 543130613Smlaier#endif /* INET */ 544126258Smlaier#ifdef INET6 545130613Smlaier case AF_INET6: 546130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 547130613Smlaier return (1); 548130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 549130613Smlaier return (-1); 550130613Smlaier if (a->gwy.addr.addr32[3] > b->gwy.addr.addr32[3]) 551130613Smlaier return (1); 552130613Smlaier if (a->gwy.addr.addr32[3] < b->gwy.addr.addr32[3]) 553130613Smlaier return (-1); 554130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 555130613Smlaier return (1); 556130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 557130613Smlaier return (-1); 558130613Smlaier if (a->gwy.addr.addr32[2] > b->gwy.addr.addr32[2]) 559130613Smlaier return (1); 560130613Smlaier if (a->gwy.addr.addr32[2] < b->gwy.addr.addr32[2]) 561130613Smlaier return (-1); 562130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 563130613Smlaier return (1); 564130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 565130613Smlaier return (-1); 566130613Smlaier if (a->gwy.addr.addr32[1] > b->gwy.addr.addr32[1]) 567130613Smlaier return (1); 568130613Smlaier if (a->gwy.addr.addr32[1] < b->gwy.addr.addr32[1]) 569130613Smlaier return (-1); 570130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 571130613Smlaier return (1); 572130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 573130613Smlaier return (-1); 574130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 575130613Smlaier return (1); 576130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 577130613Smlaier return (-1); 578130613Smlaier break; 579130613Smlaier#endif /* INET6 */ 580130613Smlaier } 581130613Smlaier 582130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 583130613Smlaier return (diff); 584130613Smlaier if ((diff = a->gwy.port - b->gwy.port) != 0) 585130613Smlaier return (diff); 586130613Smlaier 587130613Smlaier return (0); 588130613Smlaier} 589130613Smlaier 590130613Smlaier#ifdef __FreeBSD__ 591130613Smlaierstatic int 592130613Smlaier#else 593130613Smlaierstatic __inline int 594130613Smlaier#endif 595130613Smlaierpf_state_compare_id(struct pf_state *a, struct pf_state *b) 596130613Smlaier{ 597130613Smlaier if (a->id > b->id) 598130613Smlaier return (1); 599130613Smlaier if (a->id < b->id) 600130613Smlaier return (-1); 601130613Smlaier if (a->creatorid > b->creatorid) 602130613Smlaier return (1); 603130613Smlaier if (a->creatorid < b->creatorid) 604130613Smlaier return (-1); 605130613Smlaier 606130613Smlaier return (0); 607130613Smlaier} 608130613Smlaier 609145836Smlaier#ifdef __FreeBSD__ 610145836Smlaierstatic int 611145836Smlaier#else 612145836Smlaierstatic __inline int 613145836Smlaier#endif 614145836Smlaierpf_anchor_compare(struct pf_anchor *a, struct pf_anchor *b) 615145836Smlaier{ 616145836Smlaier int c = strcmp(a->path, b->path); 617145836Smlaier 618145836Smlaier return (c ? (c < 0 ? -1 : 1) : 0); 619145836Smlaier} 620145836Smlaier 621130613Smlaier#ifdef INET6 622126258Smlaiervoid 623126258Smlaierpf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af) 624126258Smlaier{ 625126258Smlaier switch (af) { 626126258Smlaier#ifdef INET 627126258Smlaier case AF_INET: 628126258Smlaier dst->addr32[0] = src->addr32[0]; 629126258Smlaier break; 630126258Smlaier#endif /* INET */ 631126258Smlaier case AF_INET6: 632126258Smlaier dst->addr32[0] = src->addr32[0]; 633126258Smlaier dst->addr32[1] = src->addr32[1]; 634126258Smlaier dst->addr32[2] = src->addr32[2]; 635126258Smlaier dst->addr32[3] = src->addr32[3]; 636126258Smlaier break; 637126258Smlaier } 638126258Smlaier} 639145836Smlaier#endif /* INET6 */ 640126258Smlaier 641126258Smlaierstruct pf_state * 642130613Smlaierpf_find_state_byid(struct pf_state *key) 643126258Smlaier{ 644130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 645130613Smlaier return (RB_FIND(pf_state_tree_id, &tree_id, key)); 646130613Smlaier} 647126258Smlaier 648130613Smlaierstruct pf_state * 649130613Smlaierpf_find_state_recurse(struct pfi_kif *kif, struct pf_state *key, u_int8_t tree) 650130613Smlaier{ 651130613Smlaier struct pf_state *s; 652130613Smlaier 653126258Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 654130613Smlaier 655130613Smlaier switch (tree) { 656130613Smlaier case PF_LAN_EXT: 657130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 658130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 659130613Smlaier &kif->pfik_lan_ext, key); 660130613Smlaier if (s != NULL) 661130613Smlaier return (s); 662130613Smlaier } 663126258Smlaier return (NULL); 664130613Smlaier case PF_EXT_GWY: 665130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 666130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 667130613Smlaier &kif->pfik_ext_gwy, key); 668130613Smlaier if (s != NULL) 669130613Smlaier return (s); 670130613Smlaier } 671130613Smlaier return (NULL); 672130613Smlaier default: 673130613Smlaier panic("pf_find_state_recurse"); 674130613Smlaier } 675126258Smlaier} 676126258Smlaier 677130613Smlaierstruct pf_state * 678130613Smlaierpf_find_state_all(struct pf_state *key, u_int8_t tree, int *more) 679130613Smlaier{ 680130613Smlaier struct pf_state *s, *ss = NULL; 681130613Smlaier struct pfi_kif *kif; 682130613Smlaier 683130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 684130613Smlaier 685130613Smlaier switch (tree) { 686130613Smlaier case PF_LAN_EXT: 687130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 688130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 689130613Smlaier &kif->pfik_lan_ext, key); 690130613Smlaier if (s == NULL) 691130613Smlaier continue; 692130613Smlaier if (more == NULL) 693130613Smlaier return (s); 694130613Smlaier ss = s; 695130613Smlaier (*more)++; 696130613Smlaier } 697130613Smlaier return (ss); 698130613Smlaier case PF_EXT_GWY: 699130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 700130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 701130613Smlaier &kif->pfik_ext_gwy, key); 702130613Smlaier if (s == NULL) 703130613Smlaier continue; 704130613Smlaier if (more == NULL) 705130613Smlaier return (s); 706130613Smlaier ss = s; 707130613Smlaier (*more)++; 708130613Smlaier } 709130613Smlaier return (ss); 710130613Smlaier default: 711130613Smlaier panic("pf_find_state_all"); 712130613Smlaier } 713130613Smlaier} 714130613Smlaier 715145836Smlaiervoid 716145836Smlaierpf_init_threshold(struct pf_threshold *threshold, 717145836Smlaier u_int32_t limit, u_int32_t seconds) 718145836Smlaier{ 719145836Smlaier threshold->limit = limit * PF_THRESHOLD_MULT; 720145836Smlaier threshold->seconds = seconds; 721145836Smlaier threshold->count = 0; 722145836Smlaier threshold->last = time_second; 723145836Smlaier} 724145836Smlaier 725145836Smlaiervoid 726145836Smlaierpf_add_threshold(struct pf_threshold *threshold) 727145836Smlaier{ 728145836Smlaier u_int32_t t = time_second, diff = t - threshold->last; 729145836Smlaier 730145836Smlaier if (diff >= threshold->seconds) 731145836Smlaier threshold->count = 0; 732145836Smlaier else 733145836Smlaier threshold->count -= threshold->count * diff / 734145836Smlaier threshold->seconds; 735145836Smlaier threshold->count += PF_THRESHOLD_MULT; 736145836Smlaier threshold->last = t; 737145836Smlaier} 738145836Smlaier 739126258Smlaierint 740145836Smlaierpf_check_threshold(struct pf_threshold *threshold) 741145836Smlaier{ 742145836Smlaier return (threshold->count > threshold->limit); 743145836Smlaier} 744145836Smlaier 745145836Smlaierint 746145836Smlaierpf_src_connlimit(struct pf_state **state) 747145836Smlaier{ 748145836Smlaier struct pf_state *s; 749145836Smlaier int bad = 0; 750145836Smlaier 751145836Smlaier (*state)->src_node->conn++; 752153725Smlaier#ifdef __FreeBSD__ 753153725Smlaier (*state)->local_flags |= PFSTATE_SRC_CONN; 754153725Smlaier#endif 755145836Smlaier pf_add_threshold(&(*state)->src_node->conn_rate); 756145836Smlaier 757145836Smlaier if ((*state)->rule.ptr->max_src_conn && 758145836Smlaier (*state)->rule.ptr->max_src_conn < 759145836Smlaier (*state)->src_node->conn) { 760145836Smlaier pf_status.lcounters[LCNT_SRCCONN]++; 761145836Smlaier bad++; 762145836Smlaier } 763145836Smlaier 764145836Smlaier if ((*state)->rule.ptr->max_src_conn_rate.limit && 765145836Smlaier pf_check_threshold(&(*state)->src_node->conn_rate)) { 766145836Smlaier pf_status.lcounters[LCNT_SRCCONNRATE]++; 767145836Smlaier bad++; 768145836Smlaier } 769145836Smlaier 770145836Smlaier if (!bad) 771145836Smlaier return (0); 772145836Smlaier 773145836Smlaier if ((*state)->rule.ptr->overload_tbl) { 774145836Smlaier struct pfr_addr p; 775145836Smlaier u_int32_t killed = 0; 776145836Smlaier 777145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_TABLE]++; 778145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 779145836Smlaier printf("pf_src_connlimit: blocking address "); 780145836Smlaier pf_print_host(&(*state)->src_node->addr, 0, 781145836Smlaier (*state)->af); 782145836Smlaier } 783145836Smlaier 784145836Smlaier bzero(&p, sizeof(p)); 785145836Smlaier p.pfra_af = (*state)->af; 786145836Smlaier switch ((*state)->af) { 787145836Smlaier#ifdef INET 788145836Smlaier case AF_INET: 789145836Smlaier p.pfra_net = 32; 790145836Smlaier p.pfra_ip4addr = (*state)->src_node->addr.v4; 791145836Smlaier break; 792145836Smlaier#endif /* INET */ 793145836Smlaier#ifdef INET6 794145836Smlaier case AF_INET6: 795145836Smlaier p.pfra_net = 128; 796145836Smlaier p.pfra_ip6addr = (*state)->src_node->addr.v6; 797145836Smlaier break; 798145836Smlaier#endif /* INET6 */ 799145836Smlaier } 800145836Smlaier 801145836Smlaier pfr_insert_kentry((*state)->rule.ptr->overload_tbl, 802145836Smlaier &p, time_second); 803145836Smlaier 804145836Smlaier /* kill existing states if that's required. */ 805145836Smlaier if ((*state)->rule.ptr->flush) { 806145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_FLUSH]++; 807145836Smlaier 808145836Smlaier RB_FOREACH(s, pf_state_tree_id, &tree_id) { 809145836Smlaier /* 810145836Smlaier * Kill states from this source. (Only those 811145836Smlaier * from the same rule if PF_FLUSH_GLOBAL is not 812145836Smlaier * set) 813145836Smlaier */ 814145836Smlaier if (s->af == (*state)->af && 815145836Smlaier (((*state)->direction == PF_OUT && 816145836Smlaier PF_AEQ(&(*state)->src_node->addr, 817145836Smlaier &s->lan.addr, s->af)) || 818145836Smlaier ((*state)->direction == PF_IN && 819145836Smlaier PF_AEQ(&(*state)->src_node->addr, 820145836Smlaier &s->ext.addr, s->af))) && 821145836Smlaier ((*state)->rule.ptr->flush & 822145836Smlaier PF_FLUSH_GLOBAL || 823145836Smlaier (*state)->rule.ptr == s->rule.ptr)) { 824145836Smlaier s->timeout = PFTM_PURGE; 825145836Smlaier s->src.state = s->dst.state = 826145836Smlaier TCPS_CLOSED; 827145836Smlaier killed++; 828145836Smlaier } 829145836Smlaier } 830145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 831145836Smlaier printf(", %u states killed", killed); 832145836Smlaier } 833145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 834145836Smlaier printf("\n"); 835145836Smlaier } 836145836Smlaier 837145836Smlaier /* kill this state */ 838145836Smlaier (*state)->timeout = PFTM_PURGE; 839145836Smlaier (*state)->src.state = (*state)->dst.state = TCPS_CLOSED; 840145836Smlaier return (1); 841145836Smlaier} 842145836Smlaier 843145836Smlaierint 844130613Smlaierpf_insert_src_node(struct pf_src_node **sn, struct pf_rule *rule, 845130613Smlaier struct pf_addr *src, sa_family_t af) 846126258Smlaier{ 847130613Smlaier struct pf_src_node k; 848126258Smlaier 849130613Smlaier if (*sn == NULL) { 850130613Smlaier k.af = af; 851130613Smlaier PF_ACPY(&k.addr, src, af); 852130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 853130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 854130613Smlaier k.rule.ptr = rule; 855130613Smlaier else 856130613Smlaier k.rule.ptr = NULL; 857130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 858130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 859130613Smlaier } 860130613Smlaier if (*sn == NULL) { 861130613Smlaier if (!rule->max_src_nodes || 862130613Smlaier rule->src_nodes < rule->max_src_nodes) 863130613Smlaier (*sn) = pool_get(&pf_src_tree_pl, PR_NOWAIT); 864145836Smlaier else 865145836Smlaier pf_status.lcounters[LCNT_SRCNODES]++; 866130613Smlaier if ((*sn) == NULL) 867130613Smlaier return (-1); 868130613Smlaier bzero(*sn, sizeof(struct pf_src_node)); 869145836Smlaier 870145836Smlaier pf_init_threshold(&(*sn)->conn_rate, 871145836Smlaier rule->max_src_conn_rate.limit, 872145836Smlaier rule->max_src_conn_rate.seconds); 873145836Smlaier 874130613Smlaier (*sn)->af = af; 875130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 876130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 877130613Smlaier (*sn)->rule.ptr = rule; 878130613Smlaier else 879130613Smlaier (*sn)->rule.ptr = NULL; 880130613Smlaier PF_ACPY(&(*sn)->addr, src, af); 881130613Smlaier if (RB_INSERT(pf_src_tree, 882130613Smlaier &tree_src_tracking, *sn) != NULL) { 883130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 884130613Smlaier printf("pf: src_tree insert failed: "); 885130613Smlaier pf_print_host(&(*sn)->addr, 0, af); 886130613Smlaier printf("\n"); 887130613Smlaier } 888130613Smlaier pool_put(&pf_src_tree_pl, *sn); 889130613Smlaier return (-1); 890130613Smlaier } 891130613Smlaier (*sn)->creation = time_second; 892130613Smlaier (*sn)->ruletype = rule->action; 893130613Smlaier if ((*sn)->rule.ptr != NULL) 894130613Smlaier (*sn)->rule.ptr->src_nodes++; 895130613Smlaier pf_status.scounters[SCNT_SRC_NODE_INSERT]++; 896130613Smlaier pf_status.src_nodes++; 897130613Smlaier } else { 898130613Smlaier if (rule->max_src_states && 899145836Smlaier (*sn)->states >= rule->max_src_states) { 900145836Smlaier pf_status.lcounters[LCNT_SRCSTATES]++; 901130613Smlaier return (-1); 902145836Smlaier } 903130613Smlaier } 904130613Smlaier return (0); 905130613Smlaier} 906126258Smlaier 907130613Smlaierint 908130613Smlaierpf_insert_state(struct pfi_kif *kif, struct pf_state *state) 909130613Smlaier{ 910126258Smlaier /* Thou MUST NOT insert multiple duplicate keys */ 911130613Smlaier state->u.s.kif = kif; 912130613Smlaier if (RB_INSERT(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state)) { 913126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 914126258Smlaier printf("pf: state insert failed: tree_lan_ext"); 915126258Smlaier printf(" lan: "); 916126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 917126258Smlaier state->af); 918126258Smlaier printf(" gwy: "); 919126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 920126258Smlaier state->af); 921126258Smlaier printf(" ext: "); 922126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 923126258Smlaier state->af); 924130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 925130613Smlaier printf(" (from sync)"); 926126258Smlaier printf("\n"); 927126258Smlaier } 928126258Smlaier return (-1); 929126258Smlaier } 930126258Smlaier 931130613Smlaier if (RB_INSERT(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state)) { 932126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 933126258Smlaier printf("pf: state insert failed: tree_ext_gwy"); 934126258Smlaier printf(" lan: "); 935126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 936126258Smlaier state->af); 937126258Smlaier printf(" gwy: "); 938126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 939126258Smlaier state->af); 940126258Smlaier printf(" ext: "); 941126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 942126258Smlaier state->af); 943130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 944130613Smlaier printf(" (from sync)"); 945126258Smlaier printf("\n"); 946126258Smlaier } 947130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 948126258Smlaier return (-1); 949126258Smlaier } 950126258Smlaier 951130613Smlaier if (state->id == 0 && state->creatorid == 0) { 952130613Smlaier state->id = htobe64(pf_status.stateid++); 953130613Smlaier state->creatorid = pf_status.hostid; 954130613Smlaier } 955130613Smlaier if (RB_INSERT(pf_state_tree_id, &tree_id, state) != NULL) { 956130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 957130613Smlaier#ifdef __FreeBSD__ 958130613Smlaier printf("pf: state insert failed: " 959130613Smlaier "id: %016llx creatorid: %08x", 960130613Smlaier (long long)be64toh(state->id), 961130613Smlaier ntohl(state->creatorid)); 962130613Smlaier#else 963130613Smlaier printf("pf: state insert failed: " 964130613Smlaier "id: %016llx creatorid: %08x", 965130613Smlaier betoh64(state->id), ntohl(state->creatorid)); 966130613Smlaier#endif 967130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 968130613Smlaier printf(" (from sync)"); 969130613Smlaier printf("\n"); 970130613Smlaier } 971130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 972130613Smlaier RB_REMOVE(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state); 973130613Smlaier return (-1); 974130613Smlaier } 975130613Smlaier TAILQ_INSERT_HEAD(&state_updates, state, u.s.entry_updates); 976130613Smlaier 977126258Smlaier pf_status.fcounters[FCNT_STATE_INSERT]++; 978126258Smlaier pf_status.states++; 979130613Smlaier pfi_attach_state(kif); 980126258Smlaier#if NPFSYNC 981126258Smlaier pfsync_insert_state(state); 982126258Smlaier#endif 983126258Smlaier return (0); 984126258Smlaier} 985126258Smlaier 986126258Smlaiervoid 987126258Smlaierpf_purge_timeout(void *arg) 988126258Smlaier{ 989127145Smlaier#ifdef __FreeBSD__ 990126261Smlaier struct callout *to = arg; 991126261Smlaier#else 992126258Smlaier struct timeout *to = arg; 993126261Smlaier#endif 994126258Smlaier int s; 995126258Smlaier 996127145Smlaier#ifdef __FreeBSD__ 997126261Smlaier PF_LOCK(); 998126261Smlaier#endif 999126258Smlaier s = splsoftnet(); 1000126258Smlaier pf_purge_expired_states(); 1001126258Smlaier pf_purge_expired_fragments(); 1002130613Smlaier pf_purge_expired_src_nodes(); 1003126258Smlaier splx(s); 1004127145Smlaier#ifdef __FreeBSD__ 1005126261Smlaier PF_UNLOCK(); 1006126261Smlaier#endif 1007126258Smlaier 1008127145Smlaier#ifdef __FreeBSD__ 1009126261Smlaier callout_reset(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz, 1010126261Smlaier pf_purge_timeout, to); 1011126261Smlaier#else 1012126258Smlaier timeout_add(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz); 1013126261Smlaier#endif 1014126258Smlaier} 1015126258Smlaier 1016126258Smlaieru_int32_t 1017126258Smlaierpf_state_expires(const struct pf_state *state) 1018126258Smlaier{ 1019126258Smlaier u_int32_t timeout; 1020126258Smlaier u_int32_t start; 1021126258Smlaier u_int32_t end; 1022126258Smlaier u_int32_t states; 1023126258Smlaier 1024126258Smlaier /* handle all PFTM_* > PFTM_MAX here */ 1025126258Smlaier if (state->timeout == PFTM_PURGE) 1026126261Smlaier return (time_second); 1027126258Smlaier if (state->timeout == PFTM_UNTIL_PACKET) 1028126258Smlaier return (0); 1029127145Smlaier#ifdef __FreeBSD__ 1030126261Smlaier KASSERT((state->timeout < PFTM_MAX), 1031126261Smlaier ("pf_state_expires: timeout > PFTM_MAX")); 1032126261Smlaier#else 1033126258Smlaier KASSERT(state->timeout < PFTM_MAX); 1034126261Smlaier#endif 1035126258Smlaier timeout = state->rule.ptr->timeout[state->timeout]; 1036126258Smlaier if (!timeout) 1037126258Smlaier timeout = pf_default_rule.timeout[state->timeout]; 1038126258Smlaier start = state->rule.ptr->timeout[PFTM_ADAPTIVE_START]; 1039126258Smlaier if (start) { 1040126258Smlaier end = state->rule.ptr->timeout[PFTM_ADAPTIVE_END]; 1041126258Smlaier states = state->rule.ptr->states; 1042126258Smlaier } else { 1043126258Smlaier start = pf_default_rule.timeout[PFTM_ADAPTIVE_START]; 1044126258Smlaier end = pf_default_rule.timeout[PFTM_ADAPTIVE_END]; 1045126258Smlaier states = pf_status.states; 1046126258Smlaier } 1047126258Smlaier if (end && states > start && start < end) { 1048126258Smlaier if (states < end) 1049126258Smlaier return (state->expire + timeout * (end - states) / 1050126258Smlaier (end - start)); 1051126258Smlaier else 1052126261Smlaier return (time_second); 1053126258Smlaier } 1054126258Smlaier return (state->expire + timeout); 1055126258Smlaier} 1056126258Smlaier 1057126258Smlaiervoid 1058130613Smlaierpf_purge_expired_src_nodes(void) 1059126258Smlaier{ 1060130613Smlaier struct pf_src_node *cur, *next; 1061126258Smlaier 1062130613Smlaier for (cur = RB_MIN(pf_src_tree, &tree_src_tracking); cur; cur = next) { 1063130613Smlaier next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur); 1064126258Smlaier 1065130613Smlaier if (cur->states <= 0 && cur->expire <= time_second) { 1066130613Smlaier if (cur->rule.ptr != NULL) { 1067130613Smlaier cur->rule.ptr->src_nodes--; 1068130613Smlaier if (cur->rule.ptr->states <= 0 && 1069130613Smlaier cur->rule.ptr->max_src_nodes <= 0) 1070130613Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1071130613Smlaier } 1072130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, cur); 1073130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 1074130613Smlaier pf_status.src_nodes--; 1075130613Smlaier pool_put(&pf_src_tree_pl, cur); 1076130613Smlaier } 1077130613Smlaier } 1078130613Smlaier} 1079126258Smlaier 1080130613Smlaiervoid 1081130613Smlaierpf_src_tree_remove_state(struct pf_state *s) 1082130613Smlaier{ 1083130613Smlaier u_int32_t timeout; 1084126258Smlaier 1085130613Smlaier if (s->src_node != NULL) { 1086145836Smlaier if (s->proto == IPPROTO_TCP) { 1087153725Smlaier#ifdef __FreeBSD__ 1088153725Smlaier if (s->local_flags & PFSTATE_SRC_CONN) 1089153725Smlaier#else 1090145836Smlaier if (s->src.state == PF_TCPS_PROXY_DST || 1091145836Smlaier s->timeout >= PFTM_TCP_ESTABLISHED) 1092153725Smlaier#endif 1093145836Smlaier --s->src_node->conn; 1094145836Smlaier } 1095130613Smlaier if (--s->src_node->states <= 0) { 1096130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1097130613Smlaier if (!timeout) 1098130613Smlaier timeout = 1099130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1100130613Smlaier s->src_node->expire = time_second + timeout; 1101130613Smlaier } 1102130613Smlaier } 1103130613Smlaier if (s->nat_src_node != s->src_node && s->nat_src_node != NULL) { 1104130613Smlaier if (--s->nat_src_node->states <= 0) { 1105130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1106130613Smlaier if (!timeout) 1107130613Smlaier timeout = 1108130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1109130613Smlaier s->nat_src_node->expire = time_second + timeout; 1110130613Smlaier } 1111130613Smlaier } 1112130613Smlaier s->src_node = s->nat_src_node = NULL; 1113130613Smlaier} 1114126258Smlaier 1115130613Smlaiervoid 1116145836Smlaierpf_purge_expired_state(struct pf_state *cur) 1117145836Smlaier{ 1118148196Smlaier#ifdef __FreeBSD__ 1119153545Smlaier if (cur->local_flags & PFSTATE_EXPIRING) 1120148196Smlaier return; 1121153545Smlaier cur->local_flags |= PFSTATE_EXPIRING; 1122148196Smlaier#endif 1123145836Smlaier if (cur->src.state == PF_TCPS_PROXY_DST) 1124162238Scsjp#ifdef __FreeBSD__ 1125162238Scsjp pf_send_tcp(NULL, cur->rule.ptr, cur->af, 1126162238Scsjp#else 1127145836Smlaier pf_send_tcp(cur->rule.ptr, cur->af, 1128162238Scsjp#endif 1129145836Smlaier &cur->ext.addr, &cur->lan.addr, 1130145836Smlaier cur->ext.port, cur->lan.port, 1131145836Smlaier cur->src.seqhi, cur->src.seqlo + 1, 1132145836Smlaier TH_RST|TH_ACK, 0, 0, 0, 1, NULL, NULL); 1133145836Smlaier RB_REMOVE(pf_state_tree_ext_gwy, 1134145836Smlaier &cur->u.s.kif->pfik_ext_gwy, cur); 1135145836Smlaier RB_REMOVE(pf_state_tree_lan_ext, 1136145836Smlaier &cur->u.s.kif->pfik_lan_ext, cur); 1137145836Smlaier RB_REMOVE(pf_state_tree_id, &tree_id, cur); 1138145836Smlaier#if NPFSYNC 1139145836Smlaier pfsync_delete_state(cur); 1140145836Smlaier#endif 1141145836Smlaier pf_src_tree_remove_state(cur); 1142145836Smlaier if (--cur->rule.ptr->states <= 0 && 1143145836Smlaier cur->rule.ptr->src_nodes <= 0) 1144145836Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1145145836Smlaier if (cur->nat_rule.ptr != NULL) 1146145836Smlaier if (--cur->nat_rule.ptr->states <= 0 && 1147145836Smlaier cur->nat_rule.ptr->src_nodes <= 0) 1148145836Smlaier pf_rm_rule(NULL, cur->nat_rule.ptr); 1149145836Smlaier if (cur->anchor.ptr != NULL) 1150145836Smlaier if (--cur->anchor.ptr->states <= 0) 1151145836Smlaier pf_rm_rule(NULL, cur->anchor.ptr); 1152145836Smlaier pf_normalize_tcp_cleanup(cur); 1153145836Smlaier pfi_detach_state(cur->u.s.kif); 1154145836Smlaier TAILQ_REMOVE(&state_updates, cur, u.s.entry_updates); 1155145836Smlaier if (cur->tag) 1156145836Smlaier pf_tag_unref(cur->tag); 1157145836Smlaier pool_put(&pf_state_pl, cur); 1158145836Smlaier pf_status.fcounters[FCNT_STATE_REMOVALS]++; 1159145836Smlaier pf_status.states--; 1160145836Smlaier} 1161145836Smlaier 1162145836Smlaiervoid 1163130613Smlaierpf_purge_expired_states(void) 1164130613Smlaier{ 1165130613Smlaier struct pf_state *cur, *next; 1166130613Smlaier 1167130613Smlaier for (cur = RB_MIN(pf_state_tree_id, &tree_id); 1168130613Smlaier cur; cur = next) { 1169130613Smlaier next = RB_NEXT(pf_state_tree_id, &tree_id, cur); 1170145836Smlaier if (pf_state_expires(cur) <= time_second) 1171145836Smlaier pf_purge_expired_state(cur); 1172126258Smlaier } 1173126258Smlaier} 1174126258Smlaier 1175126258Smlaierint 1176126258Smlaierpf_tbladdr_setup(struct pf_ruleset *rs, struct pf_addr_wrap *aw) 1177126258Smlaier{ 1178126258Smlaier if (aw->type != PF_ADDR_TABLE) 1179126258Smlaier return (0); 1180126258Smlaier if ((aw->p.tbl = pfr_attach_table(rs, aw->v.tblname)) == NULL) 1181126258Smlaier return (1); 1182126258Smlaier return (0); 1183126258Smlaier} 1184126258Smlaier 1185126258Smlaiervoid 1186126258Smlaierpf_tbladdr_remove(struct pf_addr_wrap *aw) 1187126258Smlaier{ 1188126258Smlaier if (aw->type != PF_ADDR_TABLE || aw->p.tbl == NULL) 1189126258Smlaier return; 1190126258Smlaier pfr_detach_table(aw->p.tbl); 1191126258Smlaier aw->p.tbl = NULL; 1192126258Smlaier} 1193126258Smlaier 1194126258Smlaiervoid 1195126258Smlaierpf_tbladdr_copyout(struct pf_addr_wrap *aw) 1196126258Smlaier{ 1197126258Smlaier struct pfr_ktable *kt = aw->p.tbl; 1198126258Smlaier 1199126258Smlaier if (aw->type != PF_ADDR_TABLE || kt == NULL) 1200126258Smlaier return; 1201126258Smlaier if (!(kt->pfrkt_flags & PFR_TFLAG_ACTIVE) && kt->pfrkt_root != NULL) 1202126258Smlaier kt = kt->pfrkt_root; 1203126258Smlaier aw->p.tbl = NULL; 1204126258Smlaier aw->p.tblcnt = (kt->pfrkt_flags & PFR_TFLAG_ACTIVE) ? 1205126258Smlaier kt->pfrkt_cnt : -1; 1206126258Smlaier} 1207126258Smlaier 1208126258Smlaiervoid 1209126258Smlaierpf_print_host(struct pf_addr *addr, u_int16_t p, sa_family_t af) 1210126258Smlaier{ 1211126258Smlaier switch (af) { 1212126258Smlaier#ifdef INET 1213126258Smlaier case AF_INET: { 1214126258Smlaier u_int32_t a = ntohl(addr->addr32[0]); 1215126258Smlaier printf("%u.%u.%u.%u", (a>>24)&255, (a>>16)&255, 1216126258Smlaier (a>>8)&255, a&255); 1217126258Smlaier if (p) { 1218126258Smlaier p = ntohs(p); 1219126258Smlaier printf(":%u", p); 1220126258Smlaier } 1221126258Smlaier break; 1222126258Smlaier } 1223126258Smlaier#endif /* INET */ 1224126258Smlaier#ifdef INET6 1225126258Smlaier case AF_INET6: { 1226126258Smlaier u_int16_t b; 1227126258Smlaier u_int8_t i, curstart = 255, curend = 0, 1228126258Smlaier maxstart = 0, maxend = 0; 1229126258Smlaier for (i = 0; i < 8; i++) { 1230126258Smlaier if (!addr->addr16[i]) { 1231126258Smlaier if (curstart == 255) 1232126258Smlaier curstart = i; 1233126258Smlaier else 1234126258Smlaier curend = i; 1235126258Smlaier } else { 1236126258Smlaier if (curstart) { 1237126258Smlaier if ((curend - curstart) > 1238126258Smlaier (maxend - maxstart)) { 1239126258Smlaier maxstart = curstart; 1240126258Smlaier maxend = curend; 1241126258Smlaier curstart = 255; 1242126258Smlaier } 1243126258Smlaier } 1244126258Smlaier } 1245126258Smlaier } 1246126258Smlaier for (i = 0; i < 8; i++) { 1247126258Smlaier if (i >= maxstart && i <= maxend) { 1248126258Smlaier if (maxend != 7) { 1249126258Smlaier if (i == maxstart) 1250126258Smlaier printf(":"); 1251126258Smlaier } else { 1252126258Smlaier if (i == maxend) 1253126258Smlaier printf(":"); 1254126258Smlaier } 1255126258Smlaier } else { 1256126258Smlaier b = ntohs(addr->addr16[i]); 1257126258Smlaier printf("%x", b); 1258126258Smlaier if (i < 7) 1259126258Smlaier printf(":"); 1260126258Smlaier } 1261126258Smlaier } 1262126258Smlaier if (p) { 1263126258Smlaier p = ntohs(p); 1264126258Smlaier printf("[%u]", p); 1265126258Smlaier } 1266126258Smlaier break; 1267126258Smlaier } 1268126258Smlaier#endif /* INET6 */ 1269126258Smlaier } 1270126258Smlaier} 1271126258Smlaier 1272126258Smlaiervoid 1273126258Smlaierpf_print_state(struct pf_state *s) 1274126258Smlaier{ 1275126258Smlaier switch (s->proto) { 1276126258Smlaier case IPPROTO_TCP: 1277126258Smlaier printf("TCP "); 1278126258Smlaier break; 1279126258Smlaier case IPPROTO_UDP: 1280126258Smlaier printf("UDP "); 1281126258Smlaier break; 1282126258Smlaier case IPPROTO_ICMP: 1283126258Smlaier printf("ICMP "); 1284126258Smlaier break; 1285126258Smlaier case IPPROTO_ICMPV6: 1286126258Smlaier printf("ICMPV6 "); 1287126258Smlaier break; 1288126258Smlaier default: 1289126258Smlaier printf("%u ", s->proto); 1290126258Smlaier break; 1291126258Smlaier } 1292126258Smlaier pf_print_host(&s->lan.addr, s->lan.port, s->af); 1293126258Smlaier printf(" "); 1294126258Smlaier pf_print_host(&s->gwy.addr, s->gwy.port, s->af); 1295126258Smlaier printf(" "); 1296126258Smlaier pf_print_host(&s->ext.addr, s->ext.port, s->af); 1297126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->src.seqlo, 1298126258Smlaier s->src.seqhi, s->src.max_win, s->src.seqdiff); 1299126258Smlaier if (s->src.wscale && s->dst.wscale) 1300126258Smlaier printf(" wscale=%u", s->src.wscale & PF_WSCALE_MASK); 1301126258Smlaier printf("]"); 1302126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->dst.seqlo, 1303126258Smlaier s->dst.seqhi, s->dst.max_win, s->dst.seqdiff); 1304126258Smlaier if (s->src.wscale && s->dst.wscale) 1305126258Smlaier printf(" wscale=%u", s->dst.wscale & PF_WSCALE_MASK); 1306126258Smlaier printf("]"); 1307126258Smlaier printf(" %u:%u", s->src.state, s->dst.state); 1308126258Smlaier} 1309126258Smlaier 1310126258Smlaiervoid 1311126258Smlaierpf_print_flags(u_int8_t f) 1312126258Smlaier{ 1313126258Smlaier if (f) 1314126258Smlaier printf(" "); 1315126258Smlaier if (f & TH_FIN) 1316126258Smlaier printf("F"); 1317126258Smlaier if (f & TH_SYN) 1318126258Smlaier printf("S"); 1319126258Smlaier if (f & TH_RST) 1320126258Smlaier printf("R"); 1321126258Smlaier if (f & TH_PUSH) 1322126258Smlaier printf("P"); 1323126258Smlaier if (f & TH_ACK) 1324126258Smlaier printf("A"); 1325126258Smlaier if (f & TH_URG) 1326126258Smlaier printf("U"); 1327126258Smlaier if (f & TH_ECE) 1328126258Smlaier printf("E"); 1329126258Smlaier if (f & TH_CWR) 1330126258Smlaier printf("W"); 1331126258Smlaier} 1332126258Smlaier 1333126258Smlaier#define PF_SET_SKIP_STEPS(i) \ 1334126258Smlaier do { \ 1335126258Smlaier while (head[i] != cur) { \ 1336126258Smlaier head[i]->skip[i].ptr = cur; \ 1337126258Smlaier head[i] = TAILQ_NEXT(head[i], entries); \ 1338126258Smlaier } \ 1339126258Smlaier } while (0) 1340126258Smlaier 1341126258Smlaiervoid 1342126258Smlaierpf_calc_skip_steps(struct pf_rulequeue *rules) 1343126258Smlaier{ 1344126258Smlaier struct pf_rule *cur, *prev, *head[PF_SKIP_COUNT]; 1345126258Smlaier int i; 1346126258Smlaier 1347126258Smlaier cur = TAILQ_FIRST(rules); 1348126258Smlaier prev = cur; 1349126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1350126258Smlaier head[i] = cur; 1351126258Smlaier while (cur != NULL) { 1352126258Smlaier 1353130613Smlaier if (cur->kif != prev->kif || cur->ifnot != prev->ifnot) 1354126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_IFP); 1355126258Smlaier if (cur->direction != prev->direction) 1356126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DIR); 1357126258Smlaier if (cur->af != prev->af) 1358126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_AF); 1359126258Smlaier if (cur->proto != prev->proto) 1360126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_PROTO); 1361145836Smlaier if (cur->src.neg != prev->src.neg || 1362126258Smlaier pf_addr_wrap_neq(&cur->src.addr, &prev->src.addr)) 1363126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_ADDR); 1364126258Smlaier if (cur->src.port[0] != prev->src.port[0] || 1365126258Smlaier cur->src.port[1] != prev->src.port[1] || 1366126258Smlaier cur->src.port_op != prev->src.port_op) 1367126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_PORT); 1368145836Smlaier if (cur->dst.neg != prev->dst.neg || 1369126258Smlaier pf_addr_wrap_neq(&cur->dst.addr, &prev->dst.addr)) 1370126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_ADDR); 1371126258Smlaier if (cur->dst.port[0] != prev->dst.port[0] || 1372126258Smlaier cur->dst.port[1] != prev->dst.port[1] || 1373126258Smlaier cur->dst.port_op != prev->dst.port_op) 1374126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_PORT); 1375126258Smlaier 1376126258Smlaier prev = cur; 1377126258Smlaier cur = TAILQ_NEXT(cur, entries); 1378126258Smlaier } 1379126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1380126258Smlaier PF_SET_SKIP_STEPS(i); 1381126258Smlaier} 1382126258Smlaier 1383126258Smlaierint 1384126258Smlaierpf_addr_wrap_neq(struct pf_addr_wrap *aw1, struct pf_addr_wrap *aw2) 1385126258Smlaier{ 1386126258Smlaier if (aw1->type != aw2->type) 1387126258Smlaier return (1); 1388126258Smlaier switch (aw1->type) { 1389126258Smlaier case PF_ADDR_ADDRMASK: 1390126258Smlaier if (PF_ANEQ(&aw1->v.a.addr, &aw2->v.a.addr, 0)) 1391126258Smlaier return (1); 1392126258Smlaier if (PF_ANEQ(&aw1->v.a.mask, &aw2->v.a.mask, 0)) 1393126258Smlaier return (1); 1394126258Smlaier return (0); 1395126258Smlaier case PF_ADDR_DYNIFTL: 1396130613Smlaier return (aw1->p.dyn->pfid_kt != aw2->p.dyn->pfid_kt); 1397126258Smlaier case PF_ADDR_NOROUTE: 1398126258Smlaier return (0); 1399126258Smlaier case PF_ADDR_TABLE: 1400126258Smlaier return (aw1->p.tbl != aw2->p.tbl); 1401126258Smlaier default: 1402126258Smlaier printf("invalid address type: %d\n", aw1->type); 1403126258Smlaier return (1); 1404126258Smlaier } 1405126258Smlaier} 1406126258Smlaier 1407126258Smlaieru_int16_t 1408126258Smlaierpf_cksum_fixup(u_int16_t cksum, u_int16_t old, u_int16_t new, u_int8_t udp) 1409126258Smlaier{ 1410126258Smlaier u_int32_t l; 1411126258Smlaier 1412126258Smlaier if (udp && !cksum) 1413126258Smlaier return (0x0000); 1414126258Smlaier l = cksum + old - new; 1415126258Smlaier l = (l >> 16) + (l & 65535); 1416126258Smlaier l = l & 65535; 1417126258Smlaier if (udp && !l) 1418126258Smlaier return (0xFFFF); 1419126258Smlaier return (l); 1420126258Smlaier} 1421126258Smlaier 1422126258Smlaiervoid 1423126258Smlaierpf_change_ap(struct pf_addr *a, u_int16_t *p, u_int16_t *ic, u_int16_t *pc, 1424126258Smlaier struct pf_addr *an, u_int16_t pn, u_int8_t u, sa_family_t af) 1425126258Smlaier{ 1426126258Smlaier struct pf_addr ao; 1427126258Smlaier u_int16_t po = *p; 1428126258Smlaier 1429126258Smlaier PF_ACPY(&ao, a, af); 1430126258Smlaier PF_ACPY(a, an, af); 1431126258Smlaier 1432126258Smlaier *p = pn; 1433126258Smlaier 1434126258Smlaier switch (af) { 1435126258Smlaier#ifdef INET 1436126258Smlaier case AF_INET: 1437126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1438126258Smlaier ao.addr16[0], an->addr16[0], 0), 1439126258Smlaier ao.addr16[1], an->addr16[1], 0); 1440126258Smlaier *p = pn; 1441126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1442126258Smlaier ao.addr16[0], an->addr16[0], u), 1443126258Smlaier ao.addr16[1], an->addr16[1], u), 1444126258Smlaier po, pn, u); 1445126258Smlaier break; 1446126258Smlaier#endif /* INET */ 1447126258Smlaier#ifdef INET6 1448126258Smlaier case AF_INET6: 1449126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1450126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1451126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1452126258Smlaier ao.addr16[0], an->addr16[0], u), 1453126258Smlaier ao.addr16[1], an->addr16[1], u), 1454126258Smlaier ao.addr16[2], an->addr16[2], u), 1455126258Smlaier ao.addr16[3], an->addr16[3], u), 1456126258Smlaier ao.addr16[4], an->addr16[4], u), 1457126258Smlaier ao.addr16[5], an->addr16[5], u), 1458126258Smlaier ao.addr16[6], an->addr16[6], u), 1459126258Smlaier ao.addr16[7], an->addr16[7], u), 1460126258Smlaier po, pn, u); 1461126258Smlaier break; 1462126258Smlaier#endif /* INET6 */ 1463126258Smlaier } 1464126258Smlaier} 1465126258Smlaier 1466126258Smlaier 1467126258Smlaier/* Changes a u_int32_t. Uses a void * so there are no align restrictions */ 1468126258Smlaiervoid 1469126258Smlaierpf_change_a(void *a, u_int16_t *c, u_int32_t an, u_int8_t u) 1470126258Smlaier{ 1471126258Smlaier u_int32_t ao; 1472126258Smlaier 1473126258Smlaier memcpy(&ao, a, sizeof(ao)); 1474126258Smlaier memcpy(a, &an, sizeof(u_int32_t)); 1475126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(*c, ao / 65536, an / 65536, u), 1476126258Smlaier ao % 65536, an % 65536, u); 1477126258Smlaier} 1478126258Smlaier 1479126258Smlaier#ifdef INET6 1480126258Smlaiervoid 1481126258Smlaierpf_change_a6(struct pf_addr *a, u_int16_t *c, struct pf_addr *an, u_int8_t u) 1482126258Smlaier{ 1483126258Smlaier struct pf_addr ao; 1484126258Smlaier 1485126258Smlaier PF_ACPY(&ao, a, AF_INET6); 1486126258Smlaier PF_ACPY(a, an, AF_INET6); 1487126258Smlaier 1488126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1489126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1490126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*c, 1491126258Smlaier ao.addr16[0], an->addr16[0], u), 1492126258Smlaier ao.addr16[1], an->addr16[1], u), 1493126258Smlaier ao.addr16[2], an->addr16[2], u), 1494126258Smlaier ao.addr16[3], an->addr16[3], u), 1495126258Smlaier ao.addr16[4], an->addr16[4], u), 1496126258Smlaier ao.addr16[5], an->addr16[5], u), 1497126258Smlaier ao.addr16[6], an->addr16[6], u), 1498126258Smlaier ao.addr16[7], an->addr16[7], u); 1499126258Smlaier} 1500126258Smlaier#endif /* INET6 */ 1501126258Smlaier 1502126258Smlaiervoid 1503126258Smlaierpf_change_icmp(struct pf_addr *ia, u_int16_t *ip, struct pf_addr *oa, 1504126258Smlaier struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c, 1505126258Smlaier u_int16_t *ic, u_int16_t *hc, u_int8_t u, sa_family_t af) 1506126258Smlaier{ 1507126258Smlaier struct pf_addr oia, ooa; 1508126258Smlaier 1509126258Smlaier PF_ACPY(&oia, ia, af); 1510126258Smlaier PF_ACPY(&ooa, oa, af); 1511126258Smlaier 1512126258Smlaier /* Change inner protocol port, fix inner protocol checksum. */ 1513126258Smlaier if (ip != NULL) { 1514126258Smlaier u_int16_t oip = *ip; 1515127629Smlaier u_int32_t opc = 0; /* make the compiler happy */ 1516126258Smlaier 1517126258Smlaier if (pc != NULL) 1518126258Smlaier opc = *pc; 1519126258Smlaier *ip = np; 1520126258Smlaier if (pc != NULL) 1521126258Smlaier *pc = pf_cksum_fixup(*pc, oip, *ip, u); 1522126258Smlaier *ic = pf_cksum_fixup(*ic, oip, *ip, 0); 1523126258Smlaier if (pc != NULL) 1524126258Smlaier *ic = pf_cksum_fixup(*ic, opc, *pc, 0); 1525126258Smlaier } 1526126258Smlaier /* Change inner ip address, fix inner ip and icmp checksums. */ 1527126258Smlaier PF_ACPY(ia, na, af); 1528126258Smlaier switch (af) { 1529126258Smlaier#ifdef INET 1530126258Smlaier case AF_INET: { 1531126258Smlaier u_int32_t oh2c = *h2c; 1532126258Smlaier 1533126258Smlaier *h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c, 1534126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1535126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1536126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1537126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1538126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1539126258Smlaier *ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0); 1540126258Smlaier break; 1541126258Smlaier } 1542126258Smlaier#endif /* INET */ 1543126258Smlaier#ifdef INET6 1544126258Smlaier case AF_INET6: 1545126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1546126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1547126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1548126258Smlaier oia.addr16[0], ia->addr16[0], u), 1549126258Smlaier oia.addr16[1], ia->addr16[1], u), 1550126258Smlaier oia.addr16[2], ia->addr16[2], u), 1551126258Smlaier oia.addr16[3], ia->addr16[3], u), 1552126258Smlaier oia.addr16[4], ia->addr16[4], u), 1553126258Smlaier oia.addr16[5], ia->addr16[5], u), 1554126258Smlaier oia.addr16[6], ia->addr16[6], u), 1555126258Smlaier oia.addr16[7], ia->addr16[7], u); 1556126258Smlaier break; 1557126258Smlaier#endif /* INET6 */ 1558126258Smlaier } 1559126258Smlaier /* Change outer ip address, fix outer ip or icmpv6 checksum. */ 1560126258Smlaier PF_ACPY(oa, na, af); 1561126258Smlaier switch (af) { 1562126258Smlaier#ifdef INET 1563126258Smlaier case AF_INET: 1564126258Smlaier *hc = pf_cksum_fixup(pf_cksum_fixup(*hc, 1565126258Smlaier ooa.addr16[0], oa->addr16[0], 0), 1566126258Smlaier ooa.addr16[1], oa->addr16[1], 0); 1567126258Smlaier break; 1568126258Smlaier#endif /* INET */ 1569126258Smlaier#ifdef INET6 1570126258Smlaier case AF_INET6: 1571126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1572126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1573126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1574126258Smlaier ooa.addr16[0], oa->addr16[0], u), 1575126258Smlaier ooa.addr16[1], oa->addr16[1], u), 1576126258Smlaier ooa.addr16[2], oa->addr16[2], u), 1577126258Smlaier ooa.addr16[3], oa->addr16[3], u), 1578126258Smlaier ooa.addr16[4], oa->addr16[4], u), 1579126258Smlaier ooa.addr16[5], oa->addr16[5], u), 1580126258Smlaier ooa.addr16[6], oa->addr16[6], u), 1581126258Smlaier ooa.addr16[7], oa->addr16[7], u); 1582126258Smlaier break; 1583126258Smlaier#endif /* INET6 */ 1584126258Smlaier } 1585126258Smlaier} 1586126258Smlaier 1587126258Smlaiervoid 1588162238Scsjp#ifdef __FreeBSD__ 1589162238Scsjppf_send_tcp(struct mbuf *replyto, const struct pf_rule *r, sa_family_t af, 1590162238Scsjp#else 1591126258Smlaierpf_send_tcp(const struct pf_rule *r, sa_family_t af, 1592162238Scsjp#endif 1593126258Smlaier const struct pf_addr *saddr, const struct pf_addr *daddr, 1594126258Smlaier u_int16_t sport, u_int16_t dport, u_int32_t seq, u_int32_t ack, 1595145836Smlaier u_int8_t flags, u_int16_t win, u_int16_t mss, u_int8_t ttl, int tag, 1596145836Smlaier struct ether_header *eh, struct ifnet *ifp) 1597126258Smlaier{ 1598126258Smlaier struct mbuf *m; 1599127629Smlaier int len = 0, tlen; /* make the compiler happy */ 1600126258Smlaier#ifdef INET 1601127629Smlaier struct ip *h = NULL; /* make the compiler happy */ 1602126258Smlaier#endif /* INET */ 1603126258Smlaier#ifdef INET6 1604127629Smlaier struct ip6_hdr *h6 = NULL; /* make the compiler happy */ 1605126258Smlaier#endif /* INET6 */ 1606127629Smlaier struct tcphdr *th = NULL; /* make the compiler happy */ 1607126258Smlaier char *opt; 1608126258Smlaier 1609126258Smlaier /* maximum segment size tcp option */ 1610126258Smlaier tlen = sizeof(struct tcphdr); 1611126258Smlaier if (mss) 1612126258Smlaier tlen += 4; 1613126258Smlaier 1614126258Smlaier switch (af) { 1615126258Smlaier#ifdef INET 1616126258Smlaier case AF_INET: 1617126258Smlaier len = sizeof(struct ip) + tlen; 1618126258Smlaier break; 1619126258Smlaier#endif /* INET */ 1620126258Smlaier#ifdef INET6 1621126258Smlaier case AF_INET6: 1622126258Smlaier len = sizeof(struct ip6_hdr) + tlen; 1623126258Smlaier break; 1624126258Smlaier#endif /* INET6 */ 1625126258Smlaier } 1626126258Smlaier 1627126258Smlaier /* create outgoing mbuf */ 1628132280Smlaier m = m_gethdr(M_DONTWAIT, MT_HEADER); 1629132280Smlaier if (m == NULL) 1630132280Smlaier return; 1631162238Scsjp#ifdef __FreeBSD__ 1632162238Scsjp#ifdef MAC 1633162238Scsjp if (replyto) 1634162238Scsjp mac_create_mbuf_netlayer(replyto, m); 1635162238Scsjp else 1636162238Scsjp mac_create_mbuf_from_firewall(m); 1637162238Scsjp#else 1638162238Scsjp (void)replyto; 1639162238Scsjp#endif 1640162238Scsjp#endif 1641145836Smlaier if (tag) { 1642145836Smlaier#ifdef __FreeBSD__ 1643145836Smlaier m->m_flags |= M_SKIP_FIREWALL; 1644132280Smlaier#else 1645145836Smlaier struct m_tag *mtag; 1646145836Smlaier 1647145836Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1648145836Smlaier if (mtag == NULL) { 1649145836Smlaier m_freem(m); 1650145836Smlaier return; 1651145836Smlaier } 1652145836Smlaier m_tag_prepend(m, mtag); 1653145836Smlaier#endif 1654126258Smlaier } 1655126258Smlaier#ifdef ALTQ 1656126258Smlaier if (r != NULL && r->qid) { 1657145836Smlaier struct m_tag *mtag; 1658126258Smlaier struct altq_tag *atag; 1659126258Smlaier 1660126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1661126258Smlaier if (mtag != NULL) { 1662126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1663126258Smlaier atag->qid = r->qid; 1664126258Smlaier /* add hints for ecn */ 1665126258Smlaier atag->af = af; 1666126258Smlaier atag->hdr = mtod(m, struct ip *); 1667126258Smlaier m_tag_prepend(m, mtag); 1668126258Smlaier } 1669126258Smlaier } 1670145836Smlaier#endif /* ALTQ */ 1671126258Smlaier m->m_data += max_linkhdr; 1672126258Smlaier m->m_pkthdr.len = m->m_len = len; 1673126258Smlaier m->m_pkthdr.rcvif = NULL; 1674126258Smlaier bzero(m->m_data, len); 1675126258Smlaier switch (af) { 1676126258Smlaier#ifdef INET 1677126258Smlaier case AF_INET: 1678126258Smlaier h = mtod(m, struct ip *); 1679126258Smlaier 1680126258Smlaier /* IP header fields included in the TCP checksum */ 1681126258Smlaier h->ip_p = IPPROTO_TCP; 1682126258Smlaier h->ip_len = htons(tlen); 1683126258Smlaier h->ip_src.s_addr = saddr->v4.s_addr; 1684126258Smlaier h->ip_dst.s_addr = daddr->v4.s_addr; 1685126258Smlaier 1686126258Smlaier th = (struct tcphdr *)((caddr_t)h + sizeof(struct ip)); 1687126258Smlaier break; 1688126258Smlaier#endif /* INET */ 1689126258Smlaier#ifdef INET6 1690126258Smlaier case AF_INET6: 1691126258Smlaier h6 = mtod(m, struct ip6_hdr *); 1692126258Smlaier 1693126258Smlaier /* IP header fields included in the TCP checksum */ 1694126258Smlaier h6->ip6_nxt = IPPROTO_TCP; 1695126258Smlaier h6->ip6_plen = htons(tlen); 1696126258Smlaier memcpy(&h6->ip6_src, &saddr->v6, sizeof(struct in6_addr)); 1697126258Smlaier memcpy(&h6->ip6_dst, &daddr->v6, sizeof(struct in6_addr)); 1698126258Smlaier 1699126258Smlaier th = (struct tcphdr *)((caddr_t)h6 + sizeof(struct ip6_hdr)); 1700126258Smlaier break; 1701126258Smlaier#endif /* INET6 */ 1702126258Smlaier } 1703126258Smlaier 1704126258Smlaier /* TCP header */ 1705126258Smlaier th->th_sport = sport; 1706126258Smlaier th->th_dport = dport; 1707126258Smlaier th->th_seq = htonl(seq); 1708126258Smlaier th->th_ack = htonl(ack); 1709126258Smlaier th->th_off = tlen >> 2; 1710126258Smlaier th->th_flags = flags; 1711126258Smlaier th->th_win = htons(win); 1712126258Smlaier 1713126258Smlaier if (mss) { 1714126258Smlaier opt = (char *)(th + 1); 1715126258Smlaier opt[0] = TCPOPT_MAXSEG; 1716126258Smlaier opt[1] = 4; 1717126258Smlaier HTONS(mss); 1718126258Smlaier bcopy((caddr_t)&mss, (caddr_t)(opt + 2), 2); 1719126258Smlaier } 1720126258Smlaier 1721126258Smlaier switch (af) { 1722126258Smlaier#ifdef INET 1723126258Smlaier case AF_INET: 1724126258Smlaier /* TCP checksum */ 1725126258Smlaier th->th_sum = in_cksum(m, len); 1726126258Smlaier 1727126258Smlaier /* Finish the IP header */ 1728126258Smlaier h->ip_v = 4; 1729126258Smlaier h->ip_hl = sizeof(*h) >> 2; 1730126258Smlaier h->ip_tos = IPTOS_LOWDELAY; 1731127145Smlaier#ifdef __FreeBSD__ 1732130613Smlaier h->ip_off = path_mtu_discovery ? IP_DF : 0; 1733130613Smlaier h->ip_len = len; 1734126261Smlaier#else 1735126261Smlaier h->ip_off = htons(ip_mtudisc ? IP_DF : 0); 1736130613Smlaier h->ip_len = htons(len); 1737126261Smlaier#endif 1738126258Smlaier h->ip_ttl = ttl ? ttl : ip_defttl; 1739126258Smlaier h->ip_sum = 0; 1740145836Smlaier if (eh == NULL) { 1741127145Smlaier#ifdef __FreeBSD__ 1742145836Smlaier PF_UNLOCK(); 1743145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1744145836Smlaier (void *)NULL, (void *)NULL); 1745145836Smlaier PF_LOCK(); 1746126261Smlaier#else /* ! __FreeBSD__ */ 1747145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1748145836Smlaier (void *)NULL, (void *)NULL); 1749126261Smlaier#endif 1750145836Smlaier } else { 1751145836Smlaier struct route ro; 1752145836Smlaier struct rtentry rt; 1753145836Smlaier struct ether_header *e = (void *)ro.ro_dst.sa_data; 1754145836Smlaier 1755145836Smlaier if (ifp == NULL) { 1756145836Smlaier m_freem(m); 1757145836Smlaier return; 1758145836Smlaier } 1759145836Smlaier rt.rt_ifp = ifp; 1760145836Smlaier ro.ro_rt = &rt; 1761145836Smlaier ro.ro_dst.sa_len = sizeof(ro.ro_dst); 1762145836Smlaier ro.ro_dst.sa_family = pseudo_AF_HDRCMPLT; 1763145836Smlaier bcopy(eh->ether_dhost, e->ether_shost, ETHER_ADDR_LEN); 1764145836Smlaier bcopy(eh->ether_shost, e->ether_dhost, ETHER_ADDR_LEN); 1765145836Smlaier e->ether_type = eh->ether_type; 1766145836Smlaier#ifdef __FreeBSD__ 1767145836Smlaier PF_UNLOCK(); 1768145836Smlaier /* XXX_IMPORT: later */ 1769145836Smlaier ip_output(m, (void *)NULL, &ro, 0, 1770145836Smlaier (void *)NULL, (void *)NULL); 1771145836Smlaier PF_LOCK(); 1772145836Smlaier#else /* ! __FreeBSD__ */ 1773145836Smlaier ip_output(m, (void *)NULL, &ro, IP_ROUTETOETHER, 1774145836Smlaier (void *)NULL, (void *)NULL); 1775145836Smlaier#endif 1776145836Smlaier } 1777126258Smlaier break; 1778126258Smlaier#endif /* INET */ 1779126258Smlaier#ifdef INET6 1780126258Smlaier case AF_INET6: 1781126258Smlaier /* TCP checksum */ 1782126258Smlaier th->th_sum = in6_cksum(m, IPPROTO_TCP, 1783126258Smlaier sizeof(struct ip6_hdr), tlen); 1784126258Smlaier 1785126258Smlaier h6->ip6_vfc |= IPV6_VERSION; 1786126258Smlaier h6->ip6_hlim = IPV6_DEFHLIM; 1787126258Smlaier 1788127145Smlaier#ifdef __FreeBSD__ 1789126261Smlaier PF_UNLOCK(); 1790126261Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL); 1791126261Smlaier PF_LOCK(); 1792126261Smlaier#else 1793126258Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL); 1794126261Smlaier#endif 1795126258Smlaier break; 1796126258Smlaier#endif /* INET6 */ 1797126258Smlaier } 1798126258Smlaier} 1799126258Smlaier 1800126258Smlaiervoid 1801126258Smlaierpf_send_icmp(struct mbuf *m, u_int8_t type, u_int8_t code, sa_family_t af, 1802126258Smlaier struct pf_rule *r) 1803126258Smlaier{ 1804132280Smlaier#ifdef ALTQ 1805126258Smlaier struct m_tag *mtag; 1806132280Smlaier#endif 1807126258Smlaier struct mbuf *m0; 1808127145Smlaier#ifdef __FreeBSD__ 1809126261Smlaier struct ip *ip; 1810126261Smlaier#endif 1811126258Smlaier 1812132280Smlaier#ifdef __FreeBSD__ 1813132280Smlaier m0 = m_copypacket(m, M_DONTWAIT); 1814132280Smlaier if (m0 == NULL) 1815132280Smlaier return; 1816132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 1817132280Smlaier#else 1818126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1819126258Smlaier if (mtag == NULL) 1820126258Smlaier return; 1821126258Smlaier m0 = m_copy(m, 0, M_COPYALL); 1822126258Smlaier if (m0 == NULL) { 1823126258Smlaier m_tag_free(mtag); 1824126258Smlaier return; 1825126258Smlaier } 1826126258Smlaier m_tag_prepend(m0, mtag); 1827132280Smlaier#endif 1828126258Smlaier 1829126258Smlaier#ifdef ALTQ 1830126258Smlaier if (r->qid) { 1831126258Smlaier struct altq_tag *atag; 1832126258Smlaier 1833126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1834126258Smlaier if (mtag != NULL) { 1835126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1836126258Smlaier atag->qid = r->qid; 1837126258Smlaier /* add hints for ecn */ 1838126258Smlaier atag->af = af; 1839126258Smlaier atag->hdr = mtod(m0, struct ip *); 1840126258Smlaier m_tag_prepend(m0, mtag); 1841126258Smlaier } 1842126258Smlaier } 1843145836Smlaier#endif /* ALTQ */ 1844126258Smlaier 1845126258Smlaier switch (af) { 1846126258Smlaier#ifdef INET 1847126258Smlaier case AF_INET: 1848127145Smlaier#ifdef __FreeBSD__ 1849126261Smlaier /* icmp_error() expects host byte ordering */ 1850126261Smlaier ip = mtod(m0, struct ip *); 1851126261Smlaier NTOHS(ip->ip_len); 1852126261Smlaier NTOHS(ip->ip_off); 1853126261Smlaier PF_UNLOCK(); 1854145863Sandre icmp_error(m0, type, code, 0, 0); 1855126261Smlaier PF_LOCK(); 1856145874Smlaier#else 1857145874Smlaier icmp_error(m0, type, code, 0, (void *)NULL); 1858126261Smlaier#endif 1859126258Smlaier break; 1860126258Smlaier#endif /* INET */ 1861126258Smlaier#ifdef INET6 1862126258Smlaier case AF_INET6: 1863127145Smlaier#ifdef __FreeBSD__ 1864126261Smlaier PF_UNLOCK(); 1865126261Smlaier#endif 1866126258Smlaier icmp6_error(m0, type, code, 0); 1867127145Smlaier#ifdef __FreeBSD__ 1868126261Smlaier PF_LOCK(); 1869126261Smlaier#endif 1870126258Smlaier break; 1871126258Smlaier#endif /* INET6 */ 1872126258Smlaier } 1873126258Smlaier} 1874126258Smlaier 1875126258Smlaier/* 1876126258Smlaier * Return 1 if the addresses a and b match (with mask m), otherwise return 0. 1877126258Smlaier * If n is 0, they match if they are equal. If n is != 0, they match if they 1878126258Smlaier * are different. 1879126258Smlaier */ 1880126258Smlaierint 1881126258Smlaierpf_match_addr(u_int8_t n, struct pf_addr *a, struct pf_addr *m, 1882126258Smlaier struct pf_addr *b, sa_family_t af) 1883126258Smlaier{ 1884126258Smlaier int match = 0; 1885126258Smlaier 1886126258Smlaier switch (af) { 1887126258Smlaier#ifdef INET 1888126258Smlaier case AF_INET: 1889126258Smlaier if ((a->addr32[0] & m->addr32[0]) == 1890126258Smlaier (b->addr32[0] & m->addr32[0])) 1891126258Smlaier match++; 1892126258Smlaier break; 1893126258Smlaier#endif /* INET */ 1894126258Smlaier#ifdef INET6 1895126258Smlaier case AF_INET6: 1896126258Smlaier if (((a->addr32[0] & m->addr32[0]) == 1897126258Smlaier (b->addr32[0] & m->addr32[0])) && 1898126258Smlaier ((a->addr32[1] & m->addr32[1]) == 1899126258Smlaier (b->addr32[1] & m->addr32[1])) && 1900126258Smlaier ((a->addr32[2] & m->addr32[2]) == 1901126258Smlaier (b->addr32[2] & m->addr32[2])) && 1902126258Smlaier ((a->addr32[3] & m->addr32[3]) == 1903126258Smlaier (b->addr32[3] & m->addr32[3]))) 1904126258Smlaier match++; 1905126258Smlaier break; 1906126258Smlaier#endif /* INET6 */ 1907126258Smlaier } 1908126258Smlaier if (match) { 1909126258Smlaier if (n) 1910126258Smlaier return (0); 1911126258Smlaier else 1912126258Smlaier return (1); 1913126258Smlaier } else { 1914126258Smlaier if (n) 1915126258Smlaier return (1); 1916126258Smlaier else 1917126258Smlaier return (0); 1918126258Smlaier } 1919126258Smlaier} 1920126258Smlaier 1921126258Smlaierint 1922126258Smlaierpf_match(u_int8_t op, u_int32_t a1, u_int32_t a2, u_int32_t p) 1923126258Smlaier{ 1924126258Smlaier switch (op) { 1925126258Smlaier case PF_OP_IRG: 1926126258Smlaier return ((p > a1) && (p < a2)); 1927126258Smlaier case PF_OP_XRG: 1928126258Smlaier return ((p < a1) || (p > a2)); 1929126258Smlaier case PF_OP_RRG: 1930126258Smlaier return ((p >= a1) && (p <= a2)); 1931126258Smlaier case PF_OP_EQ: 1932126258Smlaier return (p == a1); 1933126258Smlaier case PF_OP_NE: 1934126258Smlaier return (p != a1); 1935126258Smlaier case PF_OP_LT: 1936126258Smlaier return (p < a1); 1937126258Smlaier case PF_OP_LE: 1938126258Smlaier return (p <= a1); 1939126258Smlaier case PF_OP_GT: 1940126258Smlaier return (p > a1); 1941126258Smlaier case PF_OP_GE: 1942126258Smlaier return (p >= a1); 1943126258Smlaier } 1944126258Smlaier return (0); /* never reached */ 1945126258Smlaier} 1946126258Smlaier 1947126258Smlaierint 1948126258Smlaierpf_match_port(u_int8_t op, u_int16_t a1, u_int16_t a2, u_int16_t p) 1949126258Smlaier{ 1950126258Smlaier NTOHS(a1); 1951126258Smlaier NTOHS(a2); 1952126258Smlaier NTOHS(p); 1953126258Smlaier return (pf_match(op, a1, a2, p)); 1954126258Smlaier} 1955126258Smlaier 1956126258Smlaierint 1957126258Smlaierpf_match_uid(u_int8_t op, uid_t a1, uid_t a2, uid_t u) 1958126258Smlaier{ 1959126258Smlaier if (u == UID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1960126258Smlaier return (0); 1961126258Smlaier return (pf_match(op, a1, a2, u)); 1962126258Smlaier} 1963126258Smlaier 1964126258Smlaierint 1965126258Smlaierpf_match_gid(u_int8_t op, gid_t a1, gid_t a2, gid_t g) 1966126258Smlaier{ 1967126258Smlaier if (g == GID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1968126258Smlaier return (0); 1969126258Smlaier return (pf_match(op, a1, a2, g)); 1970126258Smlaier} 1971126258Smlaier 1972126258Smlaierstruct pf_tag * 1973126258Smlaierpf_get_tag(struct mbuf *m) 1974126258Smlaier{ 1975126258Smlaier struct m_tag *mtag; 1976126258Smlaier 1977126258Smlaier if ((mtag = m_tag_find(m, PACKET_TAG_PF_TAG, NULL)) != NULL) 1978126258Smlaier return ((struct pf_tag *)(mtag + 1)); 1979126258Smlaier else 1980126258Smlaier return (NULL); 1981126258Smlaier} 1982126258Smlaier 1983126258Smlaierint 1984145836Smlaierpf_match_tag(struct mbuf *m, struct pf_rule *r, struct pf_tag **pftag, int *tag) 1985126258Smlaier{ 1986126258Smlaier if (*tag == -1) { /* find mbuf tag */ 1987145836Smlaier *pftag = pf_get_tag(m); 1988145836Smlaier if (*pftag != NULL) 1989145836Smlaier *tag = (*pftag)->tag; 1990126258Smlaier else 1991126258Smlaier *tag = 0; 1992126258Smlaier } 1993126258Smlaier 1994126258Smlaier return ((!r->match_tag_not && r->match_tag == *tag) || 1995126258Smlaier (r->match_tag_not && r->match_tag != *tag)); 1996126258Smlaier} 1997126258Smlaier 1998126258Smlaierint 1999126258Smlaierpf_tag_packet(struct mbuf *m, struct pf_tag *pftag, int tag) 2000126258Smlaier{ 2001126258Smlaier struct m_tag *mtag; 2002126258Smlaier 2003126258Smlaier if (tag <= 0) 2004126258Smlaier return (0); 2005126258Smlaier 2006126258Smlaier if (pftag == NULL) { 2007126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_TAG, sizeof(*pftag), M_NOWAIT); 2008126258Smlaier if (mtag == NULL) 2009126258Smlaier return (1); 2010126258Smlaier ((struct pf_tag *)(mtag + 1))->tag = tag; 2011126258Smlaier m_tag_prepend(m, mtag); 2012126258Smlaier } else 2013126258Smlaier pftag->tag = tag; 2014126258Smlaier 2015126258Smlaier return (0); 2016126258Smlaier} 2017126258Smlaier 2018145836Smlaierstatic void 2019145836Smlaierpf_step_into_anchor(int *depth, struct pf_ruleset **rs, int n, 2020145836Smlaier struct pf_rule **r, struct pf_rule **a) 2021145836Smlaier{ 2022145836Smlaier struct pf_anchor_stackframe *f; 2023126258Smlaier 2024145836Smlaier if (*depth >= sizeof(pf_anchor_stack) / 2025145836Smlaier sizeof(pf_anchor_stack[0])) { 2026145836Smlaier printf("pf_step_into_anchor: stack overflow\n"); 2027145836Smlaier *r = TAILQ_NEXT(*r, entries); 2028145836Smlaier return; 2029145836Smlaier } else if (*depth == 0 && a != NULL) 2030145836Smlaier *a = *r; 2031145836Smlaier f = pf_anchor_stack + (*depth)++; 2032145836Smlaier f->rs = *rs; 2033145836Smlaier f->r = *r; 2034145836Smlaier if ((*r)->anchor_wildcard) { 2035145836Smlaier f->parent = &(*r)->anchor->children; 2036145836Smlaier if ((f->child = RB_MIN(pf_anchor_node, f->parent)) == 2037145836Smlaier NULL) { 2038145836Smlaier *r = NULL; 2039145836Smlaier return; 2040145836Smlaier } 2041145836Smlaier *rs = &f->child->ruleset; 2042145836Smlaier } else { 2043145836Smlaier f->parent = NULL; 2044145836Smlaier f->child = NULL; 2045145836Smlaier *rs = &(*r)->anchor->ruleset; 2046145836Smlaier } 2047145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 2048145836Smlaier} 2049126258Smlaier 2050145836Smlaierstatic void 2051145836Smlaierpf_step_out_of_anchor(int *depth, struct pf_ruleset **rs, int n, 2052145836Smlaier struct pf_rule **r, struct pf_rule **a) 2053145836Smlaier{ 2054145836Smlaier struct pf_anchor_stackframe *f; 2055145836Smlaier 2056145836Smlaier do { 2057145836Smlaier if (*depth <= 0) 2058145836Smlaier break; 2059145836Smlaier f = pf_anchor_stack + *depth - 1; 2060145836Smlaier if (f->parent != NULL && f->child != NULL) { 2061145836Smlaier f->child = RB_NEXT(pf_anchor_node, f->parent, f->child); 2062145836Smlaier if (f->child != NULL) { 2063145836Smlaier *rs = &f->child->ruleset; 2064145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 2065145836Smlaier if (*r == NULL) 2066145836Smlaier continue; 2067145836Smlaier else 2068145836Smlaier break; 2069145836Smlaier } 2070145836Smlaier } 2071145836Smlaier (*depth)--; 2072145836Smlaier if (*depth == 0 && a != NULL) 2073145836Smlaier *a = NULL; 2074145836Smlaier *rs = f->rs; 2075145836Smlaier *r = TAILQ_NEXT(f->r, entries); 2076145836Smlaier } while (*r == NULL); 2077145836Smlaier} 2078145836Smlaier 2079126258Smlaier#ifdef INET6 2080126258Smlaiervoid 2081126258Smlaierpf_poolmask(struct pf_addr *naddr, struct pf_addr *raddr, 2082126258Smlaier struct pf_addr *rmask, struct pf_addr *saddr, sa_family_t af) 2083126258Smlaier{ 2084126258Smlaier switch (af) { 2085126258Smlaier#ifdef INET 2086126258Smlaier case AF_INET: 2087126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2088126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2089126258Smlaier break; 2090126258Smlaier#endif /* INET */ 2091126258Smlaier case AF_INET6: 2092126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2093126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2094126258Smlaier naddr->addr32[1] = (raddr->addr32[1] & rmask->addr32[1]) | 2095126258Smlaier ((rmask->addr32[1] ^ 0xffffffff ) & saddr->addr32[1]); 2096126258Smlaier naddr->addr32[2] = (raddr->addr32[2] & rmask->addr32[2]) | 2097126258Smlaier ((rmask->addr32[2] ^ 0xffffffff ) & saddr->addr32[2]); 2098126258Smlaier naddr->addr32[3] = (raddr->addr32[3] & rmask->addr32[3]) | 2099126258Smlaier ((rmask->addr32[3] ^ 0xffffffff ) & saddr->addr32[3]); 2100126258Smlaier break; 2101126258Smlaier } 2102126258Smlaier} 2103126258Smlaier 2104126258Smlaiervoid 2105130613Smlaierpf_addr_inc(struct pf_addr *addr, sa_family_t af) 2106126258Smlaier{ 2107126258Smlaier switch (af) { 2108126258Smlaier#ifdef INET 2109126258Smlaier case AF_INET: 2110126258Smlaier addr->addr32[0] = htonl(ntohl(addr->addr32[0]) + 1); 2111126258Smlaier break; 2112126258Smlaier#endif /* INET */ 2113126258Smlaier case AF_INET6: 2114126258Smlaier if (addr->addr32[3] == 0xffffffff) { 2115126258Smlaier addr->addr32[3] = 0; 2116126258Smlaier if (addr->addr32[2] == 0xffffffff) { 2117126258Smlaier addr->addr32[2] = 0; 2118126258Smlaier if (addr->addr32[1] == 0xffffffff) { 2119126258Smlaier addr->addr32[1] = 0; 2120126258Smlaier addr->addr32[0] = 2121126258Smlaier htonl(ntohl(addr->addr32[0]) + 1); 2122126258Smlaier } else 2123126258Smlaier addr->addr32[1] = 2124126258Smlaier htonl(ntohl(addr->addr32[1]) + 1); 2125126258Smlaier } else 2126126258Smlaier addr->addr32[2] = 2127126258Smlaier htonl(ntohl(addr->addr32[2]) + 1); 2128126258Smlaier } else 2129126258Smlaier addr->addr32[3] = 2130126258Smlaier htonl(ntohl(addr->addr32[3]) + 1); 2131126258Smlaier break; 2132126258Smlaier } 2133126258Smlaier} 2134126258Smlaier#endif /* INET6 */ 2135126258Smlaier 2136126258Smlaier#define mix(a,b,c) \ 2137126258Smlaier do { \ 2138126258Smlaier a -= b; a -= c; a ^= (c >> 13); \ 2139126258Smlaier b -= c; b -= a; b ^= (a << 8); \ 2140126258Smlaier c -= a; c -= b; c ^= (b >> 13); \ 2141126258Smlaier a -= b; a -= c; a ^= (c >> 12); \ 2142126258Smlaier b -= c; b -= a; b ^= (a << 16); \ 2143126258Smlaier c -= a; c -= b; c ^= (b >> 5); \ 2144126258Smlaier a -= b; a -= c; a ^= (c >> 3); \ 2145126258Smlaier b -= c; b -= a; b ^= (a << 10); \ 2146126258Smlaier c -= a; c -= b; c ^= (b >> 15); \ 2147126258Smlaier } while (0) 2148126258Smlaier 2149126258Smlaier/* 2150126258Smlaier * hash function based on bridge_hash in if_bridge.c 2151126258Smlaier */ 2152126258Smlaiervoid 2153126258Smlaierpf_hash(struct pf_addr *inaddr, struct pf_addr *hash, 2154126258Smlaier struct pf_poolhashkey *key, sa_family_t af) 2155126258Smlaier{ 2156126258Smlaier u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0]; 2157126258Smlaier 2158126258Smlaier switch (af) { 2159126258Smlaier#ifdef INET 2160126258Smlaier case AF_INET: 2161126258Smlaier a += inaddr->addr32[0]; 2162126258Smlaier b += key->key32[1]; 2163126258Smlaier mix(a, b, c); 2164126258Smlaier hash->addr32[0] = c + key->key32[2]; 2165126258Smlaier break; 2166126258Smlaier#endif /* INET */ 2167126258Smlaier#ifdef INET6 2168126258Smlaier case AF_INET6: 2169126258Smlaier a += inaddr->addr32[0]; 2170126258Smlaier b += inaddr->addr32[2]; 2171126258Smlaier mix(a, b, c); 2172126258Smlaier hash->addr32[0] = c; 2173126258Smlaier a += inaddr->addr32[1]; 2174126258Smlaier b += inaddr->addr32[3]; 2175126258Smlaier c += key->key32[1]; 2176126258Smlaier mix(a, b, c); 2177126258Smlaier hash->addr32[1] = c; 2178126258Smlaier a += inaddr->addr32[2]; 2179126258Smlaier b += inaddr->addr32[1]; 2180126258Smlaier c += key->key32[2]; 2181126258Smlaier mix(a, b, c); 2182126258Smlaier hash->addr32[2] = c; 2183126258Smlaier a += inaddr->addr32[3]; 2184126258Smlaier b += inaddr->addr32[0]; 2185126258Smlaier c += key->key32[3]; 2186126258Smlaier mix(a, b, c); 2187126258Smlaier hash->addr32[3] = c; 2188126258Smlaier break; 2189126258Smlaier#endif /* INET6 */ 2190126258Smlaier } 2191126258Smlaier} 2192126258Smlaier 2193126258Smlaierint 2194130613Smlaierpf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr, 2195130613Smlaier struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn) 2196126258Smlaier{ 2197126258Smlaier unsigned char hash[16]; 2198130613Smlaier struct pf_pool *rpool = &r->rpool; 2199130613Smlaier struct pf_addr *raddr = &rpool->cur->addr.v.a.addr; 2200130613Smlaier struct pf_addr *rmask = &rpool->cur->addr.v.a.mask; 2201126258Smlaier struct pf_pooladdr *acur = rpool->cur; 2202130613Smlaier struct pf_src_node k; 2203126258Smlaier 2204130613Smlaier if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR && 2205130613Smlaier (r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2206130613Smlaier k.af = af; 2207130613Smlaier PF_ACPY(&k.addr, saddr, af); 2208130613Smlaier if (r->rule_flag & PFRULE_RULESRCTRACK || 2209130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) 2210130613Smlaier k.rule.ptr = r; 2211130613Smlaier else 2212130613Smlaier k.rule.ptr = NULL; 2213130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 2214130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 2215130613Smlaier if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) { 2216130613Smlaier PF_ACPY(naddr, &(*sn)->raddr, af); 2217130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 2218130613Smlaier printf("pf_map_addr: src tracking maps "); 2219130613Smlaier pf_print_host(&k.addr, 0, af); 2220130613Smlaier printf(" to "); 2221130613Smlaier pf_print_host(naddr, 0, af); 2222130613Smlaier printf("\n"); 2223130613Smlaier } 2224130613Smlaier return (0); 2225130613Smlaier } 2226130613Smlaier } 2227130613Smlaier 2228126258Smlaier if (rpool->cur->addr.type == PF_ADDR_NOROUTE) 2229126258Smlaier return (1); 2230130613Smlaier if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2231145836Smlaier switch (af) { 2232145836Smlaier#ifdef INET 2233145836Smlaier case AF_INET: 2234130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 && 2235130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2236130613Smlaier PF_POOL_ROUNDROBIN) 2237130613Smlaier return (1); 2238130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr4; 2239130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask4; 2240145836Smlaier break; 2241145836Smlaier#endif /* INET */ 2242145836Smlaier#ifdef INET6 2243145836Smlaier case AF_INET6: 2244130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 && 2245130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2246130613Smlaier PF_POOL_ROUNDROBIN) 2247130613Smlaier return (1); 2248130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr6; 2249130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask6; 2250145836Smlaier break; 2251145836Smlaier#endif /* INET6 */ 2252130613Smlaier } 2253130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2254126258Smlaier if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN) 2255126258Smlaier return (1); /* unsupported */ 2256126258Smlaier } else { 2257126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2258126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2259126258Smlaier } 2260126258Smlaier 2261126258Smlaier switch (rpool->opts & PF_POOL_TYPEMASK) { 2262126258Smlaier case PF_POOL_NONE: 2263126258Smlaier PF_ACPY(naddr, raddr, af); 2264126258Smlaier break; 2265126258Smlaier case PF_POOL_BITMASK: 2266126258Smlaier PF_POOLMASK(naddr, raddr, rmask, saddr, af); 2267126258Smlaier break; 2268126258Smlaier case PF_POOL_RANDOM: 2269126258Smlaier if (init_addr != NULL && PF_AZERO(init_addr, af)) { 2270126258Smlaier switch (af) { 2271126258Smlaier#ifdef INET 2272126258Smlaier case AF_INET: 2273145836Smlaier rpool->counter.addr32[0] = htonl(arc4random()); 2274126258Smlaier break; 2275126258Smlaier#endif /* INET */ 2276126258Smlaier#ifdef INET6 2277126258Smlaier case AF_INET6: 2278126258Smlaier if (rmask->addr32[3] != 0xffffffff) 2279145836Smlaier rpool->counter.addr32[3] = 2280145836Smlaier htonl(arc4random()); 2281126258Smlaier else 2282126258Smlaier break; 2283126258Smlaier if (rmask->addr32[2] != 0xffffffff) 2284145836Smlaier rpool->counter.addr32[2] = 2285145836Smlaier htonl(arc4random()); 2286126258Smlaier else 2287126258Smlaier break; 2288126258Smlaier if (rmask->addr32[1] != 0xffffffff) 2289145836Smlaier rpool->counter.addr32[1] = 2290145836Smlaier htonl(arc4random()); 2291126258Smlaier else 2292126258Smlaier break; 2293126258Smlaier if (rmask->addr32[0] != 0xffffffff) 2294145836Smlaier rpool->counter.addr32[0] = 2295145836Smlaier htonl(arc4random()); 2296126258Smlaier break; 2297126258Smlaier#endif /* INET6 */ 2298126258Smlaier } 2299126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2300126258Smlaier PF_ACPY(init_addr, naddr, af); 2301126258Smlaier 2302126258Smlaier } else { 2303126258Smlaier PF_AINC(&rpool->counter, af); 2304126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2305126258Smlaier } 2306126258Smlaier break; 2307126258Smlaier case PF_POOL_SRCHASH: 2308126258Smlaier pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af); 2309126258Smlaier PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af); 2310126258Smlaier break; 2311126258Smlaier case PF_POOL_ROUNDROBIN: 2312126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2313126258Smlaier if (!pfr_pool_get(rpool->cur->addr.p.tbl, 2314126258Smlaier &rpool->tblidx, &rpool->counter, 2315126258Smlaier &raddr, &rmask, af)) 2316126258Smlaier goto get_addr; 2317130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2318130613Smlaier if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2319130613Smlaier &rpool->tblidx, &rpool->counter, 2320130613Smlaier &raddr, &rmask, af)) 2321130613Smlaier goto get_addr; 2322126258Smlaier } else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af)) 2323126258Smlaier goto get_addr; 2324126258Smlaier 2325126258Smlaier try_next: 2326126258Smlaier if ((rpool->cur = TAILQ_NEXT(rpool->cur, entries)) == NULL) 2327126258Smlaier rpool->cur = TAILQ_FIRST(&rpool->list); 2328126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2329126258Smlaier rpool->tblidx = -1; 2330126258Smlaier if (pfr_pool_get(rpool->cur->addr.p.tbl, 2331126258Smlaier &rpool->tblidx, &rpool->counter, 2332126258Smlaier &raddr, &rmask, af)) { 2333130613Smlaier /* table contains no address of type 'af' */ 2334126258Smlaier if (rpool->cur != acur) 2335126258Smlaier goto try_next; 2336126258Smlaier return (1); 2337126258Smlaier } 2338130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2339130613Smlaier rpool->tblidx = -1; 2340130613Smlaier if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2341130613Smlaier &rpool->tblidx, &rpool->counter, 2342130613Smlaier &raddr, &rmask, af)) { 2343130613Smlaier /* table contains no address of type 'af' */ 2344130613Smlaier if (rpool->cur != acur) 2345130613Smlaier goto try_next; 2346130613Smlaier return (1); 2347130613Smlaier } 2348126258Smlaier } else { 2349126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2350126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2351126258Smlaier PF_ACPY(&rpool->counter, raddr, af); 2352126258Smlaier } 2353126258Smlaier 2354126258Smlaier get_addr: 2355126258Smlaier PF_ACPY(naddr, &rpool->counter, af); 2356139045Sdhartmei if (init_addr != NULL && PF_AZERO(init_addr, af)) 2357139045Sdhartmei PF_ACPY(init_addr, naddr, af); 2358126258Smlaier PF_AINC(&rpool->counter, af); 2359126258Smlaier break; 2360126258Smlaier } 2361130613Smlaier if (*sn != NULL) 2362130613Smlaier PF_ACPY(&(*sn)->raddr, naddr, af); 2363126258Smlaier 2364126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC && 2365126258Smlaier (rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2366130613Smlaier printf("pf_map_addr: selected address "); 2367126258Smlaier pf_print_host(naddr, 0, af); 2368126258Smlaier printf("\n"); 2369126258Smlaier } 2370126258Smlaier 2371126258Smlaier return (0); 2372126258Smlaier} 2373126258Smlaier 2374126258Smlaierint 2375130613Smlaierpf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r, 2376126258Smlaier struct pf_addr *saddr, struct pf_addr *daddr, u_int16_t dport, 2377130613Smlaier struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high, 2378130613Smlaier struct pf_src_node **sn) 2379126258Smlaier{ 2380130613Smlaier struct pf_state key; 2381126258Smlaier struct pf_addr init_addr; 2382126258Smlaier u_int16_t cut; 2383126258Smlaier 2384126258Smlaier bzero(&init_addr, sizeof(init_addr)); 2385130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2386126258Smlaier return (1); 2387126258Smlaier 2388149884Smlaier if (proto == IPPROTO_ICMP) { 2389149884Smlaier low = 1; 2390149884Smlaier high = 65535; 2391149884Smlaier } 2392149884Smlaier 2393126258Smlaier do { 2394126258Smlaier key.af = af; 2395126258Smlaier key.proto = proto; 2396130613Smlaier PF_ACPY(&key.ext.addr, daddr, key.af); 2397130613Smlaier PF_ACPY(&key.gwy.addr, naddr, key.af); 2398130613Smlaier key.ext.port = dport; 2399126258Smlaier 2400126258Smlaier /* 2401126258Smlaier * port search; start random, step; 2402126258Smlaier * similar 2 portloop in in_pcbbind 2403126258Smlaier */ 2404149884Smlaier if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP || 2405149884Smlaier proto == IPPROTO_ICMP)) { 2406139045Sdhartmei key.gwy.port = dport; 2407130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2408126258Smlaier return (0); 2409126258Smlaier } else if (low == 0 && high == 0) { 2410130613Smlaier key.gwy.port = *nport; 2411130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2412126258Smlaier return (0); 2413126258Smlaier } else if (low == high) { 2414130613Smlaier key.gwy.port = htons(low); 2415130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) { 2416126258Smlaier *nport = htons(low); 2417126258Smlaier return (0); 2418126258Smlaier } 2419126258Smlaier } else { 2420126258Smlaier u_int16_t tmp; 2421126258Smlaier 2422126258Smlaier if (low > high) { 2423126258Smlaier tmp = low; 2424126258Smlaier low = high; 2425126258Smlaier high = tmp; 2426126258Smlaier } 2427126258Smlaier /* low < high */ 2428145836Smlaier cut = htonl(arc4random()) % (1 + high - low) + low; 2429126258Smlaier /* low <= cut <= high */ 2430126258Smlaier for (tmp = cut; tmp <= high; ++(tmp)) { 2431130613Smlaier key.gwy.port = htons(tmp); 2432130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2433126258Smlaier NULL) { 2434126258Smlaier *nport = htons(tmp); 2435126258Smlaier return (0); 2436126258Smlaier } 2437126258Smlaier } 2438126258Smlaier for (tmp = cut - 1; tmp >= low; --(tmp)) { 2439130613Smlaier key.gwy.port = htons(tmp); 2440130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2441126258Smlaier NULL) { 2442126258Smlaier *nport = htons(tmp); 2443126258Smlaier return (0); 2444126258Smlaier } 2445126258Smlaier } 2446126258Smlaier } 2447126258Smlaier 2448130613Smlaier switch (r->rpool.opts & PF_POOL_TYPEMASK) { 2449126258Smlaier case PF_POOL_RANDOM: 2450126258Smlaier case PF_POOL_ROUNDROBIN: 2451130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2452126258Smlaier return (1); 2453126258Smlaier break; 2454126258Smlaier case PF_POOL_NONE: 2455126258Smlaier case PF_POOL_SRCHASH: 2456126258Smlaier case PF_POOL_BITMASK: 2457126258Smlaier default: 2458126258Smlaier return (1); 2459126258Smlaier } 2460126258Smlaier } while (! PF_AEQ(&init_addr, naddr, af) ); 2461126258Smlaier 2462126258Smlaier return (1); /* none available */ 2463126258Smlaier} 2464126258Smlaier 2465126258Smlaierstruct pf_rule * 2466126258Smlaierpf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off, 2467130613Smlaier int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport, 2468126258Smlaier struct pf_addr *daddr, u_int16_t dport, int rs_num) 2469126258Smlaier{ 2470145836Smlaier struct pf_rule *r, *rm = NULL; 2471126258Smlaier struct pf_ruleset *ruleset = NULL; 2472145836Smlaier struct pf_tag *pftag = NULL; 2473145836Smlaier int tag = -1; 2474145836Smlaier int asd = 0; 2475126258Smlaier 2476126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr); 2477126258Smlaier while (r && rm == NULL) { 2478126258Smlaier struct pf_rule_addr *src = NULL, *dst = NULL; 2479126258Smlaier struct pf_addr_wrap *xdst = NULL; 2480126258Smlaier 2481126258Smlaier if (r->action == PF_BINAT && direction == PF_IN) { 2482126258Smlaier src = &r->dst; 2483126258Smlaier if (r->rpool.cur != NULL) 2484126258Smlaier xdst = &r->rpool.cur->addr; 2485126258Smlaier } else { 2486126258Smlaier src = &r->src; 2487126258Smlaier dst = &r->dst; 2488126258Smlaier } 2489126258Smlaier 2490126258Smlaier r->evaluations++; 2491130613Smlaier if (r->kif != NULL && 2492130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 2493126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 2494126258Smlaier else if (r->direction && r->direction != direction) 2495126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 2496126258Smlaier else if (r->af && r->af != pd->af) 2497126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 2498126258Smlaier else if (r->proto && r->proto != pd->proto) 2499126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 2500145836Smlaier else if (PF_MISMATCHAW(&src->addr, saddr, pd->af, src->neg)) 2501126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR : 2502126258Smlaier PF_SKIP_DST_ADDR].ptr; 2503126258Smlaier else if (src->port_op && !pf_match_port(src->port_op, 2504126258Smlaier src->port[0], src->port[1], sport)) 2505126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT : 2506126258Smlaier PF_SKIP_DST_PORT].ptr; 2507126258Smlaier else if (dst != NULL && 2508145836Smlaier PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->neg)) 2509126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 2510126258Smlaier else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af, 0)) 2511126258Smlaier r = TAILQ_NEXT(r, entries); 2512126258Smlaier else if (dst != NULL && dst->port_op && 2513126258Smlaier !pf_match_port(dst->port_op, dst->port[0], 2514126258Smlaier dst->port[1], dport)) 2515126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 2516145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 2517145836Smlaier r = TAILQ_NEXT(r, entries); 2518126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto != 2519126258Smlaier IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m, 2520126258Smlaier off, pd->hdr.tcp), r->os_fingerprint))) 2521126258Smlaier r = TAILQ_NEXT(r, entries); 2522145836Smlaier else { 2523145836Smlaier if (r->tag) 2524145836Smlaier tag = r->tag; 2525145836Smlaier if (r->anchor == NULL) { 2526126258Smlaier rm = r; 2527145836Smlaier } else 2528145836Smlaier pf_step_into_anchor(&asd, &ruleset, rs_num, &r, NULL); 2529145836Smlaier } 2530145836Smlaier if (r == NULL) 2531145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, rs_num, &r, NULL); 2532126258Smlaier } 2533145836Smlaier if (pf_tag_packet(m, pftag, tag)) 2534145836Smlaier return (NULL); 2535126258Smlaier if (rm != NULL && (rm->action == PF_NONAT || 2536126258Smlaier rm->action == PF_NORDR || rm->action == PF_NOBINAT)) 2537126258Smlaier return (NULL); 2538126258Smlaier return (rm); 2539126258Smlaier} 2540126258Smlaier 2541126258Smlaierstruct pf_rule * 2542126258Smlaierpf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction, 2543130613Smlaier struct pfi_kif *kif, struct pf_src_node **sn, 2544126258Smlaier struct pf_addr *saddr, u_int16_t sport, 2545126258Smlaier struct pf_addr *daddr, u_int16_t dport, 2546126258Smlaier struct pf_addr *naddr, u_int16_t *nport) 2547126258Smlaier{ 2548126258Smlaier struct pf_rule *r = NULL; 2549126258Smlaier 2550126258Smlaier if (direction == PF_OUT) { 2551130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2552126258Smlaier sport, daddr, dport, PF_RULESET_BINAT); 2553126258Smlaier if (r == NULL) 2554130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2555126258Smlaier saddr, sport, daddr, dport, PF_RULESET_NAT); 2556126258Smlaier } else { 2557130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2558126258Smlaier sport, daddr, dport, PF_RULESET_RDR); 2559126258Smlaier if (r == NULL) 2560130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2561126258Smlaier saddr, sport, daddr, dport, PF_RULESET_BINAT); 2562126258Smlaier } 2563126258Smlaier 2564126258Smlaier if (r != NULL) { 2565126258Smlaier switch (r->action) { 2566126258Smlaier case PF_NONAT: 2567126258Smlaier case PF_NOBINAT: 2568126258Smlaier case PF_NORDR: 2569126258Smlaier return (NULL); 2570126258Smlaier case PF_NAT: 2571130613Smlaier if (pf_get_sport(pd->af, pd->proto, r, saddr, 2572126258Smlaier daddr, dport, naddr, nport, r->rpool.proxy_port[0], 2573130613Smlaier r->rpool.proxy_port[1], sn)) { 2574126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 2575126258Smlaier ("pf: NAT proxy port allocation " 2576126258Smlaier "(%u-%u) failed\n", 2577126258Smlaier r->rpool.proxy_port[0], 2578126258Smlaier r->rpool.proxy_port[1])); 2579126258Smlaier return (NULL); 2580126258Smlaier } 2581126258Smlaier break; 2582126258Smlaier case PF_BINAT: 2583126258Smlaier switch (direction) { 2584126258Smlaier case PF_OUT: 2585130613Smlaier if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){ 2586145836Smlaier switch (pd->af) { 2587145836Smlaier#ifdef INET 2588145836Smlaier case AF_INET: 2589130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2590130613Smlaier pfid_acnt4 < 1) 2591130613Smlaier return (NULL); 2592130613Smlaier PF_POOLMASK(naddr, 2593130613Smlaier &r->rpool.cur->addr.p.dyn-> 2594130613Smlaier pfid_addr4, 2595130613Smlaier &r->rpool.cur->addr.p.dyn-> 2596130613Smlaier pfid_mask4, 2597130613Smlaier saddr, AF_INET); 2598145836Smlaier break; 2599145836Smlaier#endif /* INET */ 2600145836Smlaier#ifdef INET6 2601145836Smlaier case AF_INET6: 2602130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2603130613Smlaier pfid_acnt6 < 1) 2604130613Smlaier return (NULL); 2605130613Smlaier PF_POOLMASK(naddr, 2606130613Smlaier &r->rpool.cur->addr.p.dyn-> 2607130613Smlaier pfid_addr6, 2608130613Smlaier &r->rpool.cur->addr.p.dyn-> 2609130613Smlaier pfid_mask6, 2610130613Smlaier saddr, AF_INET6); 2611145836Smlaier break; 2612145836Smlaier#endif /* INET6 */ 2613130613Smlaier } 2614130613Smlaier } else 2615126258Smlaier PF_POOLMASK(naddr, 2616126258Smlaier &r->rpool.cur->addr.v.a.addr, 2617126258Smlaier &r->rpool.cur->addr.v.a.mask, 2618126258Smlaier saddr, pd->af); 2619126258Smlaier break; 2620126258Smlaier case PF_IN: 2621138041Sdhartmei if (r->src.addr.type == PF_ADDR_DYNIFTL) { 2622145836Smlaier switch (pd->af) { 2623145836Smlaier#ifdef INET 2624145836Smlaier case AF_INET: 2625130613Smlaier if (r->src.addr.p.dyn-> 2626130613Smlaier pfid_acnt4 < 1) 2627130613Smlaier return (NULL); 2628130613Smlaier PF_POOLMASK(naddr, 2629130613Smlaier &r->src.addr.p.dyn-> 2630130613Smlaier pfid_addr4, 2631130613Smlaier &r->src.addr.p.dyn-> 2632130613Smlaier pfid_mask4, 2633130613Smlaier daddr, AF_INET); 2634145836Smlaier break; 2635145836Smlaier#endif /* INET */ 2636145836Smlaier#ifdef INET6 2637145836Smlaier case AF_INET6: 2638130613Smlaier if (r->src.addr.p.dyn-> 2639130613Smlaier pfid_acnt6 < 1) 2640130613Smlaier return (NULL); 2641130613Smlaier PF_POOLMASK(naddr, 2642130613Smlaier &r->src.addr.p.dyn-> 2643130613Smlaier pfid_addr6, 2644130613Smlaier &r->src.addr.p.dyn-> 2645130613Smlaier pfid_mask6, 2646130613Smlaier daddr, AF_INET6); 2647145836Smlaier break; 2648145836Smlaier#endif /* INET6 */ 2649130613Smlaier } 2650130613Smlaier } else 2651126258Smlaier PF_POOLMASK(naddr, 2652126258Smlaier &r->src.addr.v.a.addr, 2653126261Smlaier &r->src.addr.v.a.mask, daddr, 2654126258Smlaier pd->af); 2655126258Smlaier break; 2656126258Smlaier } 2657126258Smlaier break; 2658126258Smlaier case PF_RDR: { 2659140518Sdhartmei if (pf_map_addr(pd->af, r, saddr, naddr, NULL, sn)) 2660126258Smlaier return (NULL); 2661149884Smlaier if ((r->rpool.opts & PF_POOL_TYPEMASK) == 2662149884Smlaier PF_POOL_BITMASK) 2663149884Smlaier PF_POOLMASK(naddr, naddr, 2664149884Smlaier &r->rpool.cur->addr.v.a.mask, daddr, 2665149884Smlaier pd->af); 2666126258Smlaier 2667126258Smlaier if (r->rpool.proxy_port[1]) { 2668126258Smlaier u_int32_t tmp_nport; 2669126258Smlaier 2670126258Smlaier tmp_nport = ((ntohs(dport) - 2671126258Smlaier ntohs(r->dst.port[0])) % 2672126258Smlaier (r->rpool.proxy_port[1] - 2673126258Smlaier r->rpool.proxy_port[0] + 1)) + 2674126258Smlaier r->rpool.proxy_port[0]; 2675126258Smlaier 2676126258Smlaier /* wrap around if necessary */ 2677126258Smlaier if (tmp_nport > 65535) 2678126258Smlaier tmp_nport -= 65535; 2679126258Smlaier *nport = htons((u_int16_t)tmp_nport); 2680126258Smlaier } else if (r->rpool.proxy_port[0]) 2681126258Smlaier *nport = htons(r->rpool.proxy_port[0]); 2682126258Smlaier break; 2683126258Smlaier } 2684126258Smlaier default: 2685126258Smlaier return (NULL); 2686126258Smlaier } 2687126258Smlaier } 2688126258Smlaier 2689126258Smlaier return (r); 2690126258Smlaier} 2691126258Smlaier 2692126258Smlaierint 2693135920Smlaier#ifdef __FreeBSD__ 2694135920Smlaierpf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd, 2695135920Smlaier struct inpcb *inp_arg) 2696135920Smlaier#else 2697130613Smlaierpf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd) 2698135920Smlaier#endif 2699126258Smlaier{ 2700126258Smlaier struct pf_addr *saddr, *daddr; 2701126258Smlaier u_int16_t sport, dport; 2702127145Smlaier#ifdef __FreeBSD__ 2703126261Smlaier struct inpcbinfo *pi; 2704126261Smlaier#else 2705126258Smlaier struct inpcbtable *tb; 2706126261Smlaier#endif 2707126258Smlaier struct inpcb *inp; 2708126258Smlaier 2709126258Smlaier *uid = UID_MAX; 2710126258Smlaier *gid = GID_MAX; 2711135920Smlaier#ifdef __FreeBSD__ 2712135920Smlaier if (inp_arg != NULL) { 2713135920Smlaier INP_LOCK_ASSERT(inp_arg); 2714135920Smlaier if (inp_arg->inp_socket) { 2715135920Smlaier *uid = inp_arg->inp_socket->so_cred->cr_uid; 2716135920Smlaier *gid = inp_arg->inp_socket->so_cred->cr_groups[0]; 2717135920Smlaier return (1); 2718135920Smlaier } else 2719135920Smlaier return (0); 2720135920Smlaier } 2721135920Smlaier#endif 2722130613Smlaier switch (pd->proto) { 2723126258Smlaier case IPPROTO_TCP: 2724126258Smlaier sport = pd->hdr.tcp->th_sport; 2725126258Smlaier dport = pd->hdr.tcp->th_dport; 2726127145Smlaier#ifdef __FreeBSD__ 2727126261Smlaier pi = &tcbinfo; 2728126261Smlaier#else 2729126258Smlaier tb = &tcbtable; 2730126261Smlaier#endif 2731126258Smlaier break; 2732126258Smlaier case IPPROTO_UDP: 2733126258Smlaier sport = pd->hdr.udp->uh_sport; 2734126258Smlaier dport = pd->hdr.udp->uh_dport; 2735127145Smlaier#ifdef __FreeBSD__ 2736126261Smlaier pi = &udbinfo; 2737126261Smlaier#else 2738126258Smlaier tb = &udbtable; 2739126261Smlaier#endif 2740126258Smlaier break; 2741126258Smlaier default: 2742126258Smlaier return (0); 2743126258Smlaier } 2744126258Smlaier if (direction == PF_IN) { 2745126258Smlaier saddr = pd->src; 2746126258Smlaier daddr = pd->dst; 2747126258Smlaier } else { 2748126258Smlaier u_int16_t p; 2749126258Smlaier 2750126258Smlaier p = sport; 2751126258Smlaier sport = dport; 2752126258Smlaier dport = p; 2753126258Smlaier saddr = pd->dst; 2754126258Smlaier daddr = pd->src; 2755126258Smlaier } 2756130613Smlaier switch (pd->af) { 2757145836Smlaier#ifdef INET 2758126258Smlaier case AF_INET: 2759127145Smlaier#ifdef __FreeBSD__ 2760126261Smlaier INP_INFO_RLOCK(pi); /* XXX LOR */ 2761126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, daddr->v4, 2762126261Smlaier dport, 0, NULL); 2763126261Smlaier if (inp == NULL) { 2764126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, 2765126261Smlaier daddr->v4, dport, INPLOOKUP_WILDCARD, NULL); 2766126261Smlaier if(inp == NULL) { 2767126261Smlaier INP_INFO_RUNLOCK(pi); 2768126261Smlaier return (0); 2769126261Smlaier } 2770126261Smlaier } 2771126261Smlaier#else 2772126258Smlaier inp = in_pcbhashlookup(tb, saddr->v4, sport, daddr->v4, dport); 2773126258Smlaier if (inp == NULL) { 2774130613Smlaier inp = in_pcblookup_listen(tb, daddr->v4, dport, 0); 2775126258Smlaier if (inp == NULL) 2776126258Smlaier return (0); 2777126258Smlaier } 2778126261Smlaier#endif 2779126258Smlaier break; 2780145836Smlaier#endif /* INET */ 2781126258Smlaier#ifdef INET6 2782126258Smlaier case AF_INET6: 2783127145Smlaier#ifdef __FreeBSD__ 2784126261Smlaier INP_INFO_RLOCK(pi); 2785126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2786126261Smlaier &daddr->v6, dport, 0, NULL); 2787126261Smlaier if (inp == NULL) { 2788126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2789126261Smlaier &daddr->v6, dport, INPLOOKUP_WILDCARD, NULL); 2790126261Smlaier if (inp == NULL) { 2791126261Smlaier INP_INFO_RUNLOCK(pi); 2792126261Smlaier return (0); 2793126261Smlaier } 2794126261Smlaier } 2795126261Smlaier#else 2796126258Smlaier inp = in6_pcbhashlookup(tb, &saddr->v6, sport, &daddr->v6, 2797126258Smlaier dport); 2798126258Smlaier if (inp == NULL) { 2799130613Smlaier inp = in6_pcblookup_listen(tb, &daddr->v6, dport, 0); 2800126258Smlaier if (inp == NULL) 2801126258Smlaier return (0); 2802126258Smlaier } 2803126261Smlaier#endif 2804126258Smlaier break; 2805126258Smlaier#endif /* INET6 */ 2806126258Smlaier 2807126258Smlaier default: 2808126258Smlaier return (0); 2809126258Smlaier } 2810127145Smlaier#ifdef __FreeBSD__ 2811126261Smlaier INP_LOCK(inp); 2812136925Smlaier if ((inp->inp_socket == NULL) || (inp->inp_socket->so_cred == NULL)) { 2813136925Smlaier INP_UNLOCK(inp); 2814136925Smlaier INP_INFO_RUNLOCK(pi); 2815136925Smlaier return (0); 2816136925Smlaier } 2817126261Smlaier *uid = inp->inp_socket->so_cred->cr_uid; 2818126261Smlaier *gid = inp->inp_socket->so_cred->cr_groups[0]; 2819126261Smlaier INP_UNLOCK(inp); 2820126261Smlaier INP_INFO_RUNLOCK(pi); 2821126261Smlaier#else 2822126258Smlaier *uid = inp->inp_socket->so_euid; 2823126258Smlaier *gid = inp->inp_socket->so_egid; 2824126261Smlaier#endif 2825126258Smlaier return (1); 2826126258Smlaier} 2827126258Smlaier 2828126258Smlaieru_int8_t 2829126258Smlaierpf_get_wscale(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2830126258Smlaier{ 2831126258Smlaier int hlen; 2832126258Smlaier u_int8_t hdr[60]; 2833126258Smlaier u_int8_t *opt, optlen; 2834126258Smlaier u_int8_t wscale = 0; 2835126258Smlaier 2836126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2837126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2838126258Smlaier return (0); 2839126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2840126258Smlaier return (0); 2841126258Smlaier opt = hdr + sizeof(struct tcphdr); 2842126258Smlaier hlen -= sizeof(struct tcphdr); 2843126258Smlaier while (hlen >= 3) { 2844126258Smlaier switch (*opt) { 2845126258Smlaier case TCPOPT_EOL: 2846126258Smlaier case TCPOPT_NOP: 2847126258Smlaier ++opt; 2848126258Smlaier --hlen; 2849126258Smlaier break; 2850126258Smlaier case TCPOPT_WINDOW: 2851126258Smlaier wscale = opt[2]; 2852126258Smlaier if (wscale > TCP_MAX_WINSHIFT) 2853126258Smlaier wscale = TCP_MAX_WINSHIFT; 2854126258Smlaier wscale |= PF_WSCALE_FLAG; 2855130613Smlaier /* FALLTHROUGH */ 2856126258Smlaier default: 2857126258Smlaier optlen = opt[1]; 2858126258Smlaier if (optlen < 2) 2859126258Smlaier optlen = 2; 2860126258Smlaier hlen -= optlen; 2861126258Smlaier opt += optlen; 2862130613Smlaier break; 2863126258Smlaier } 2864126258Smlaier } 2865126258Smlaier return (wscale); 2866126258Smlaier} 2867126258Smlaier 2868126258Smlaieru_int16_t 2869126258Smlaierpf_get_mss(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2870126258Smlaier{ 2871126258Smlaier int hlen; 2872126258Smlaier u_int8_t hdr[60]; 2873126258Smlaier u_int8_t *opt, optlen; 2874126258Smlaier u_int16_t mss = tcp_mssdflt; 2875126258Smlaier 2876126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2877126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2878126258Smlaier return (0); 2879126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2880126258Smlaier return (0); 2881126258Smlaier opt = hdr + sizeof(struct tcphdr); 2882126258Smlaier hlen -= sizeof(struct tcphdr); 2883126258Smlaier while (hlen >= TCPOLEN_MAXSEG) { 2884126258Smlaier switch (*opt) { 2885126258Smlaier case TCPOPT_EOL: 2886126258Smlaier case TCPOPT_NOP: 2887126258Smlaier ++opt; 2888126258Smlaier --hlen; 2889126258Smlaier break; 2890126258Smlaier case TCPOPT_MAXSEG: 2891126258Smlaier bcopy((caddr_t)(opt + 2), (caddr_t)&mss, 2); 2892145030Sglebius NTOHS(mss); 2893130613Smlaier /* FALLTHROUGH */ 2894126258Smlaier default: 2895126258Smlaier optlen = opt[1]; 2896126258Smlaier if (optlen < 2) 2897126258Smlaier optlen = 2; 2898126258Smlaier hlen -= optlen; 2899126258Smlaier opt += optlen; 2900130613Smlaier break; 2901126258Smlaier } 2902126258Smlaier } 2903126258Smlaier return (mss); 2904126258Smlaier} 2905126258Smlaier 2906126258Smlaieru_int16_t 2907126258Smlaierpf_calc_mss(struct pf_addr *addr, sa_family_t af, u_int16_t offer) 2908126258Smlaier{ 2909126258Smlaier#ifdef INET 2910126258Smlaier struct sockaddr_in *dst; 2911126258Smlaier struct route ro; 2912126258Smlaier#endif /* INET */ 2913126258Smlaier#ifdef INET6 2914126258Smlaier struct sockaddr_in6 *dst6; 2915126258Smlaier struct route_in6 ro6; 2916126258Smlaier#endif /* INET6 */ 2917126258Smlaier struct rtentry *rt = NULL; 2918127629Smlaier int hlen = 0; /* make the compiler happy */ 2919126258Smlaier u_int16_t mss = tcp_mssdflt; 2920126258Smlaier 2921126258Smlaier switch (af) { 2922126258Smlaier#ifdef INET 2923126258Smlaier case AF_INET: 2924126258Smlaier hlen = sizeof(struct ip); 2925126258Smlaier bzero(&ro, sizeof(ro)); 2926126258Smlaier dst = (struct sockaddr_in *)&ro.ro_dst; 2927126258Smlaier dst->sin_family = AF_INET; 2928126258Smlaier dst->sin_len = sizeof(*dst); 2929126258Smlaier dst->sin_addr = addr->v4; 2930127145Smlaier#ifdef __FreeBSD__ 2931126261Smlaier#ifdef RTF_PRCLONING 2932126261Smlaier rtalloc_ign(&ro, (RTF_CLONING | RTF_PRCLONING)); 2933126261Smlaier#else /* !RTF_PRCLONING */ 2934126261Smlaier rtalloc_ign(&ro, RTF_CLONING); 2935126261Smlaier#endif 2936126261Smlaier#else /* ! __FreeBSD__ */ 2937126258Smlaier rtalloc_noclone(&ro, NO_CLONING); 2938126261Smlaier#endif 2939126258Smlaier rt = ro.ro_rt; 2940126258Smlaier break; 2941126258Smlaier#endif /* INET */ 2942126258Smlaier#ifdef INET6 2943126258Smlaier case AF_INET6: 2944126258Smlaier hlen = sizeof(struct ip6_hdr); 2945126258Smlaier bzero(&ro6, sizeof(ro6)); 2946126258Smlaier dst6 = (struct sockaddr_in6 *)&ro6.ro_dst; 2947126258Smlaier dst6->sin6_family = AF_INET6; 2948126258Smlaier dst6->sin6_len = sizeof(*dst6); 2949126258Smlaier dst6->sin6_addr = addr->v6; 2950127145Smlaier#ifdef __FreeBSD__ 2951126261Smlaier#ifdef RTF_PRCLONING 2952126261Smlaier rtalloc_ign((struct route *)&ro6, 2953126261Smlaier (RTF_CLONING | RTF_PRCLONING)); 2954126261Smlaier#else /* !RTF_PRCLONING */ 2955126261Smlaier rtalloc_ign((struct route *)&ro6, RTF_CLONING); 2956126261Smlaier#endif 2957126261Smlaier#else /* ! __FreeBSD__ */ 2958126258Smlaier rtalloc_noclone((struct route *)&ro6, NO_CLONING); 2959126261Smlaier#endif 2960126258Smlaier rt = ro6.ro_rt; 2961126258Smlaier break; 2962126258Smlaier#endif /* INET6 */ 2963126258Smlaier } 2964126258Smlaier 2965126258Smlaier if (rt && rt->rt_ifp) { 2966126258Smlaier mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr); 2967126258Smlaier mss = max(tcp_mssdflt, mss); 2968126258Smlaier RTFREE(rt); 2969126258Smlaier } 2970126258Smlaier mss = min(mss, offer); 2971126258Smlaier mss = max(mss, 64); /* sanity - at least max opt space */ 2972126258Smlaier return (mss); 2973126258Smlaier} 2974126258Smlaier 2975126258Smlaiervoid 2976126258Smlaierpf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr) 2977126258Smlaier{ 2978126258Smlaier struct pf_rule *r = s->rule.ptr; 2979126258Smlaier 2980130613Smlaier s->rt_kif = NULL; 2981126258Smlaier if (!r->rt || r->rt == PF_FASTROUTE) 2982126258Smlaier return; 2983126258Smlaier switch (s->af) { 2984126258Smlaier#ifdef INET 2985126258Smlaier case AF_INET: 2986130613Smlaier pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL, 2987130613Smlaier &s->nat_src_node); 2988130613Smlaier s->rt_kif = r->rpool.cur->kif; 2989126258Smlaier break; 2990126258Smlaier#endif /* INET */ 2991126258Smlaier#ifdef INET6 2992126258Smlaier case AF_INET6: 2993130613Smlaier pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL, 2994130613Smlaier &s->nat_src_node); 2995130613Smlaier s->rt_kif = r->rpool.cur->kif; 2996126258Smlaier break; 2997126258Smlaier#endif /* INET6 */ 2998126258Smlaier } 2999126258Smlaier} 3000126258Smlaier 3001126258Smlaierint 3002126258Smlaierpf_test_tcp(struct pf_rule **rm, struct pf_state **sm, int direction, 3003130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3004135920Smlaier#ifdef __FreeBSD__ 3005135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3006145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 3007135920Smlaier#else 3008145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3009145836Smlaier struct ifqueue *ifq) 3010135920Smlaier#endif 3011126258Smlaier{ 3012130613Smlaier struct pf_rule *nr = NULL; 3013126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3014126258Smlaier struct tcphdr *th = pd->hdr.tcp; 3015126258Smlaier u_int16_t bport, nport = 0; 3016126258Smlaier sa_family_t af = pd->af; 3017126258Smlaier int lookup = -1; 3018126258Smlaier uid_t uid; 3019126258Smlaier gid_t gid; 3020126258Smlaier struct pf_rule *r, *a = NULL; 3021126258Smlaier struct pf_ruleset *ruleset = NULL; 3022130613Smlaier struct pf_src_node *nsn = NULL; 3023126258Smlaier u_short reason; 3024126258Smlaier int rewrite = 0; 3025126258Smlaier struct pf_tag *pftag = NULL; 3026126258Smlaier int tag = -1; 3027126258Smlaier u_int16_t mss = tcp_mssdflt; 3028145836Smlaier int asd = 0; 3029126258Smlaier 3030145836Smlaier if (pf_check_congestion(ifq)) { 3031145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3032145836Smlaier return (PF_DROP); 3033145836Smlaier } 3034145836Smlaier 3035126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3036126258Smlaier 3037126258Smlaier if (direction == PF_OUT) { 3038126258Smlaier bport = nport = th->th_sport; 3039126258Smlaier /* check outgoing packet for BINAT/NAT */ 3040130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3041126258Smlaier saddr, th->th_sport, daddr, th->th_dport, 3042130613Smlaier &pd->naddr, &nport)) != NULL) { 3043130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3044126258Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 3045130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 3046126258Smlaier rewrite++; 3047130613Smlaier if (nr->natpass) 3048126258Smlaier r = NULL; 3049130613Smlaier pd->nat_rule = nr; 3050126258Smlaier } 3051126258Smlaier } else { 3052126258Smlaier bport = nport = th->th_dport; 3053126258Smlaier /* check incoming packet for BINAT/RDR */ 3054130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3055130613Smlaier saddr, th->th_sport, daddr, th->th_dport, 3056130613Smlaier &pd->naddr, &nport)) != NULL) { 3057130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3058126258Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 3059130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 3060126258Smlaier rewrite++; 3061130613Smlaier if (nr->natpass) 3062126258Smlaier r = NULL; 3063130613Smlaier pd->nat_rule = nr; 3064126258Smlaier } 3065126258Smlaier } 3066126258Smlaier 3067126258Smlaier while (r != NULL) { 3068126258Smlaier r->evaluations++; 3069130613Smlaier if (r->kif != NULL && 3070130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3071126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3072126258Smlaier else if (r->direction && r->direction != direction) 3073126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3074126258Smlaier else if (r->af && r->af != af) 3075126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3076126258Smlaier else if (r->proto && r->proto != IPPROTO_TCP) 3077126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3078145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3079126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3080126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3081126258Smlaier r->src.port[0], r->src.port[1], th->th_sport)) 3082126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3083145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3084126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3085126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3086126258Smlaier r->dst.port[0], r->dst.port[1], th->th_dport)) 3087126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3088126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3089126258Smlaier r = TAILQ_NEXT(r, entries); 3090126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3091126258Smlaier r = TAILQ_NEXT(r, entries); 3092126258Smlaier else if ((r->flagset & th->th_flags) != r->flags) 3093126258Smlaier r = TAILQ_NEXT(r, entries); 3094126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 3095135920Smlaier#ifdef __FreeBSD__ 3096135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3097135920Smlaier#else 3098130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3099135920Smlaier#endif 3100126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3101126258Smlaier uid)) 3102126258Smlaier r = TAILQ_NEXT(r, entries); 3103126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 3104135920Smlaier#ifdef __FreeBSD__ 3105135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3106135920Smlaier#else 3107130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3108135920Smlaier#endif 3109126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3110126258Smlaier gid)) 3111126258Smlaier r = TAILQ_NEXT(r, entries); 3112145836Smlaier else if (r->prob && r->prob <= arc4random()) 3113126258Smlaier r = TAILQ_NEXT(r, entries); 3114145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3115126258Smlaier r = TAILQ_NEXT(r, entries); 3116126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && !pf_osfp_match( 3117126258Smlaier pf_osfp_fingerprint(pd, m, off, th), r->os_fingerprint)) 3118126258Smlaier r = TAILQ_NEXT(r, entries); 3119126258Smlaier else { 3120126258Smlaier if (r->tag) 3121126258Smlaier tag = r->tag; 3122126258Smlaier if (r->anchor == NULL) { 3123126258Smlaier *rm = r; 3124126258Smlaier *am = a; 3125126258Smlaier *rsm = ruleset; 3126126258Smlaier if ((*rm)->quick) 3127126258Smlaier break; 3128126258Smlaier r = TAILQ_NEXT(r, entries); 3129126258Smlaier } else 3130145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3131145836Smlaier PF_RULESET_FILTER, &r, &a); 3132126258Smlaier } 3133145836Smlaier if (r == NULL) 3134145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3135145836Smlaier PF_RULESET_FILTER, &r, &a); 3136126258Smlaier } 3137126258Smlaier r = *rm; 3138126258Smlaier a = *am; 3139126258Smlaier ruleset = *rsm; 3140126258Smlaier 3141126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3142126258Smlaier 3143126258Smlaier if (r->log) { 3144126258Smlaier if (rewrite) 3145126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3146130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3147126258Smlaier } 3148126258Smlaier 3149126258Smlaier if ((r->action == PF_DROP) && 3150126258Smlaier ((r->rule_flag & PFRULE_RETURNRST) || 3151126258Smlaier (r->rule_flag & PFRULE_RETURNICMP) || 3152126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3153126258Smlaier /* undo NAT changes, if they have taken place */ 3154130613Smlaier if (nr != NULL) { 3155130613Smlaier if (direction == PF_OUT) { 3156130613Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 3157130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3158130613Smlaier rewrite++; 3159130613Smlaier } else { 3160130613Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 3161130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3162130613Smlaier rewrite++; 3163130613Smlaier } 3164126258Smlaier } 3165126258Smlaier if (((r->rule_flag & PFRULE_RETURNRST) || 3166126258Smlaier (r->rule_flag & PFRULE_RETURN)) && 3167126258Smlaier !(th->th_flags & TH_RST)) { 3168126258Smlaier u_int32_t ack = ntohl(th->th_seq) + pd->p_len; 3169126258Smlaier 3170126258Smlaier if (th->th_flags & TH_SYN) 3171126258Smlaier ack++; 3172126258Smlaier if (th->th_flags & TH_FIN) 3173126258Smlaier ack++; 3174162238Scsjp#ifdef __FreeBSD__ 3175162238Scsjp pf_send_tcp(m, r, af, pd->dst, 3176162238Scsjp#else 3177126258Smlaier pf_send_tcp(r, af, pd->dst, 3178162238Scsjp#endif 3179126258Smlaier pd->src, th->th_dport, th->th_sport, 3180126258Smlaier ntohl(th->th_ack), ack, TH_RST|TH_ACK, 0, 0, 3181145836Smlaier r->return_ttl, 1, pd->eh, kif->pfik_ifp); 3182126258Smlaier } else if ((af == AF_INET) && r->return_icmp) 3183126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3184126258Smlaier r->return_icmp & 255, af, r); 3185126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3186126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3187126258Smlaier r->return_icmp6 & 255, af, r); 3188126258Smlaier } 3189126258Smlaier 3190126258Smlaier if (r->action == PF_DROP) 3191126258Smlaier return (PF_DROP); 3192126258Smlaier 3193126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3194126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3195126258Smlaier return (PF_DROP); 3196126258Smlaier } 3197126258Smlaier 3198130613Smlaier if (r->keep_state || nr != NULL || 3199126258Smlaier (pd->flags & PFDESC_TCP_NORM)) { 3200126258Smlaier /* create new state */ 3201126258Smlaier u_int16_t len; 3202126258Smlaier struct pf_state *s = NULL; 3203130613Smlaier struct pf_src_node *sn = NULL; 3204126258Smlaier 3205126258Smlaier len = pd->tot_len - off - (th->th_off << 2); 3206130613Smlaier 3207130613Smlaier /* check maximums */ 3208145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3209145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3210145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3211130613Smlaier goto cleanup; 3212145836Smlaier } 3213130613Smlaier /* src node for flter rule */ 3214130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3215130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3216145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3217145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3218130613Smlaier goto cleanup; 3219145836Smlaier } 3220130613Smlaier /* src node for translation rule */ 3221130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3222130613Smlaier ((direction == PF_OUT && 3223130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3224145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3225145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3226130613Smlaier goto cleanup; 3227145836Smlaier } 3228130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3229126258Smlaier if (s == NULL) { 3230145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3231130613Smlaiercleanup: 3232130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3233130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3234130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3235130613Smlaier pf_status.src_nodes--; 3236130613Smlaier pool_put(&pf_src_tree_pl, sn); 3237130613Smlaier } 3238130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3239130613Smlaier nsn->expire == 0) { 3240130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3241130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3242130613Smlaier pf_status.src_nodes--; 3243130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3244130613Smlaier } 3245126258Smlaier return (PF_DROP); 3246126258Smlaier } 3247126258Smlaier bzero(s, sizeof(*s)); 3248126258Smlaier s->rule.ptr = r; 3249130613Smlaier s->nat_rule.ptr = nr; 3250126258Smlaier s->anchor.ptr = a; 3251145836Smlaier STATE_INC_COUNTERS(s); 3252126258Smlaier s->allow_opts = r->allow_opts; 3253126258Smlaier s->log = r->log & 2; 3254126258Smlaier s->proto = IPPROTO_TCP; 3255126258Smlaier s->direction = direction; 3256126258Smlaier s->af = af; 3257126258Smlaier if (direction == PF_OUT) { 3258126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3259126258Smlaier s->gwy.port = th->th_sport; /* sport */ 3260126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3261126258Smlaier s->ext.port = th->th_dport; 3262130613Smlaier if (nr != NULL) { 3263130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3264126258Smlaier s->lan.port = bport; 3265126258Smlaier } else { 3266126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3267126258Smlaier s->lan.port = s->gwy.port; 3268126258Smlaier } 3269126258Smlaier } else { 3270126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3271126258Smlaier s->lan.port = th->th_dport; 3272126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3273126258Smlaier s->ext.port = th->th_sport; 3274130613Smlaier if (nr != NULL) { 3275130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3276126258Smlaier s->gwy.port = bport; 3277126258Smlaier } else { 3278126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3279126258Smlaier s->gwy.port = s->lan.port; 3280126258Smlaier } 3281126258Smlaier } 3282126258Smlaier 3283126258Smlaier s->src.seqlo = ntohl(th->th_seq); 3284126258Smlaier s->src.seqhi = s->src.seqlo + len + 1; 3285126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3286126258Smlaier r->keep_state == PF_STATE_MODULATE) { 3287126258Smlaier /* Generate sequence number modulator */ 3288145836Smlaier while ((s->src.seqdiff = htonl(arc4random())) == 0) 3289126258Smlaier ; 3290126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, 3291126258Smlaier htonl(s->src.seqlo + s->src.seqdiff), 0); 3292126258Smlaier rewrite = 1; 3293126258Smlaier } else 3294126258Smlaier s->src.seqdiff = 0; 3295126258Smlaier if (th->th_flags & TH_SYN) { 3296126258Smlaier s->src.seqhi++; 3297126258Smlaier s->src.wscale = pf_get_wscale(m, off, th->th_off, af); 3298126258Smlaier } 3299126258Smlaier s->src.max_win = MAX(ntohs(th->th_win), 1); 3300126258Smlaier if (s->src.wscale & PF_WSCALE_MASK) { 3301126258Smlaier /* Remove scale factor from initial window */ 3302126258Smlaier int win = s->src.max_win; 3303126258Smlaier win += 1 << (s->src.wscale & PF_WSCALE_MASK); 3304126258Smlaier s->src.max_win = (win - 1) >> 3305126258Smlaier (s->src.wscale & PF_WSCALE_MASK); 3306126258Smlaier } 3307126258Smlaier if (th->th_flags & TH_FIN) 3308126258Smlaier s->src.seqhi++; 3309126258Smlaier s->dst.seqhi = 1; 3310126258Smlaier s->dst.max_win = 1; 3311126258Smlaier s->src.state = TCPS_SYN_SENT; 3312126258Smlaier s->dst.state = TCPS_CLOSED; 3313126261Smlaier s->creation = time_second; 3314126261Smlaier s->expire = time_second; 3315126258Smlaier s->timeout = PFTM_TCP_FIRST_PACKET; 3316126258Smlaier pf_set_rt_ifp(s, saddr); 3317130613Smlaier if (sn != NULL) { 3318130613Smlaier s->src_node = sn; 3319130613Smlaier s->src_node->states++; 3320130613Smlaier } 3321130613Smlaier if (nsn != NULL) { 3322130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3323130613Smlaier s->nat_src_node = nsn; 3324130613Smlaier s->nat_src_node->states++; 3325130613Smlaier } 3326126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && pf_normalize_tcp_init(m, 3327126258Smlaier off, pd, th, &s->src, &s->dst)) { 3328126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3329130613Smlaier pf_src_tree_remove_state(s); 3330145836Smlaier STATE_DEC_COUNTERS(s); 3331126258Smlaier pool_put(&pf_state_pl, s); 3332126258Smlaier return (PF_DROP); 3333126258Smlaier } 3334126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && s->src.scrub && 3335145836Smlaier pf_normalize_tcp_stateful(m, off, pd, &reason, th, s, 3336145836Smlaier &s->src, &s->dst, &rewrite)) { 3337145836Smlaier /* This really shouldn't happen!!! */ 3338145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 3339145836Smlaier ("pf_normalize_tcp_stateful failed on first pkt")); 3340126258Smlaier pf_normalize_tcp_cleanup(s); 3341130613Smlaier pf_src_tree_remove_state(s); 3342145836Smlaier STATE_DEC_COUNTERS(s); 3343126258Smlaier pool_put(&pf_state_pl, s); 3344126258Smlaier return (PF_DROP); 3345126258Smlaier } 3346130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3347126258Smlaier pf_normalize_tcp_cleanup(s); 3348145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3349130613Smlaier pf_src_tree_remove_state(s); 3350145836Smlaier STATE_DEC_COUNTERS(s); 3351126258Smlaier pool_put(&pf_state_pl, s); 3352126258Smlaier return (PF_DROP); 3353126258Smlaier } else 3354126258Smlaier *sm = s; 3355145836Smlaier if (tag > 0) { 3356145836Smlaier pf_tag_ref(tag); 3357145836Smlaier s->tag = tag; 3358145836Smlaier } 3359126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3360126258Smlaier r->keep_state == PF_STATE_SYNPROXY) { 3361126258Smlaier s->src.state = PF_TCPS_PROXY_SRC; 3362130613Smlaier if (nr != NULL) { 3363130613Smlaier if (direction == PF_OUT) { 3364130613Smlaier pf_change_ap(saddr, &th->th_sport, 3365130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3366130613Smlaier bport, 0, af); 3367130613Smlaier } else { 3368130613Smlaier pf_change_ap(daddr, &th->th_dport, 3369130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3370130613Smlaier bport, 0, af); 3371130613Smlaier } 3372130613Smlaier } 3373145836Smlaier s->src.seqhi = htonl(arc4random()); 3374126258Smlaier /* Find mss option */ 3375126258Smlaier mss = pf_get_mss(m, off, th->th_off, af); 3376126258Smlaier mss = pf_calc_mss(saddr, af, mss); 3377126258Smlaier mss = pf_calc_mss(daddr, af, mss); 3378126258Smlaier s->src.mss = mss; 3379162238Scsjp#ifdef __FreeBSD__ 3380162238Scsjp pf_send_tcp(NULL, r, af, daddr, saddr, th->th_dport, 3381162238Scsjp#else 3382126258Smlaier pf_send_tcp(r, af, daddr, saddr, th->th_dport, 3383162238Scsjp#endif 3384130613Smlaier th->th_sport, s->src.seqhi, ntohl(th->th_seq) + 1, 3385145836Smlaier TH_SYN|TH_ACK, 0, s->src.mss, 0, 1, NULL, NULL); 3386145836Smlaier REASON_SET(&reason, PFRES_SYNPROXY); 3387126258Smlaier return (PF_SYNPROXY_DROP); 3388126258Smlaier } 3389126258Smlaier } 3390126258Smlaier 3391126258Smlaier /* copy back packet headers if we performed NAT operations */ 3392126258Smlaier if (rewrite) 3393126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3394126258Smlaier 3395126258Smlaier return (PF_PASS); 3396126258Smlaier} 3397126258Smlaier 3398126258Smlaierint 3399126258Smlaierpf_test_udp(struct pf_rule **rm, struct pf_state **sm, int direction, 3400130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3401135920Smlaier#ifdef __FreeBSD__ 3402135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3403145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 3404135920Smlaier#else 3405145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3406145836Smlaier struct ifqueue *ifq) 3407135920Smlaier#endif 3408126258Smlaier{ 3409130613Smlaier struct pf_rule *nr = NULL; 3410126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3411126258Smlaier struct udphdr *uh = pd->hdr.udp; 3412126258Smlaier u_int16_t bport, nport = 0; 3413126258Smlaier sa_family_t af = pd->af; 3414126258Smlaier int lookup = -1; 3415126258Smlaier uid_t uid; 3416126258Smlaier gid_t gid; 3417126258Smlaier struct pf_rule *r, *a = NULL; 3418126258Smlaier struct pf_ruleset *ruleset = NULL; 3419130613Smlaier struct pf_src_node *nsn = NULL; 3420126258Smlaier u_short reason; 3421126258Smlaier int rewrite = 0; 3422126258Smlaier struct pf_tag *pftag = NULL; 3423126258Smlaier int tag = -1; 3424145836Smlaier int asd = 0; 3425126258Smlaier 3426145836Smlaier if (pf_check_congestion(ifq)) { 3427145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3428145836Smlaier return (PF_DROP); 3429145836Smlaier } 3430145836Smlaier 3431126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3432126258Smlaier 3433126258Smlaier if (direction == PF_OUT) { 3434126258Smlaier bport = nport = uh->uh_sport; 3435126258Smlaier /* check outgoing packet for BINAT/NAT */ 3436130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3437126258Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, 3438130613Smlaier &pd->naddr, &nport)) != NULL) { 3439130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3440126258Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3441130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3442126258Smlaier rewrite++; 3443130613Smlaier if (nr->natpass) 3444126258Smlaier r = NULL; 3445130613Smlaier pd->nat_rule = nr; 3446126258Smlaier } 3447126258Smlaier } else { 3448126258Smlaier bport = nport = uh->uh_dport; 3449126258Smlaier /* check incoming packet for BINAT/RDR */ 3450130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3451130613Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, &pd->naddr, 3452130613Smlaier &nport)) != NULL) { 3453130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3454126258Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3455130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3456126258Smlaier rewrite++; 3457130613Smlaier if (nr->natpass) 3458126258Smlaier r = NULL; 3459130613Smlaier pd->nat_rule = nr; 3460126258Smlaier } 3461126258Smlaier } 3462126258Smlaier 3463126258Smlaier while (r != NULL) { 3464126258Smlaier r->evaluations++; 3465130613Smlaier if (r->kif != NULL && 3466130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3467126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3468126258Smlaier else if (r->direction && r->direction != direction) 3469126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3470126258Smlaier else if (r->af && r->af != af) 3471126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3472126258Smlaier else if (r->proto && r->proto != IPPROTO_UDP) 3473126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3474145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3475126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3476126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3477126258Smlaier r->src.port[0], r->src.port[1], uh->uh_sport)) 3478126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3479145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3480126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3481126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3482126258Smlaier r->dst.port[0], r->dst.port[1], uh->uh_dport)) 3483126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3484126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3485126258Smlaier r = TAILQ_NEXT(r, entries); 3486126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3487126258Smlaier r = TAILQ_NEXT(r, entries); 3488126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 3489135920Smlaier#ifdef __FreeBSD__ 3490135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3491135920Smlaier#else 3492130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3493135920Smlaier#endif 3494126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3495126258Smlaier uid)) 3496126258Smlaier r = TAILQ_NEXT(r, entries); 3497126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 3498135920Smlaier#ifdef __FreeBSD__ 3499135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3500135920Smlaier#else 3501130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3502135920Smlaier#endif 3503126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3504126258Smlaier gid)) 3505126258Smlaier r = TAILQ_NEXT(r, entries); 3506145836Smlaier else if (r->prob && r->prob <= arc4random()) 3507126258Smlaier r = TAILQ_NEXT(r, entries); 3508145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3509126258Smlaier r = TAILQ_NEXT(r, entries); 3510126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3511126258Smlaier r = TAILQ_NEXT(r, entries); 3512126258Smlaier else { 3513126258Smlaier if (r->tag) 3514126258Smlaier tag = r->tag; 3515126258Smlaier if (r->anchor == NULL) { 3516126258Smlaier *rm = r; 3517126258Smlaier *am = a; 3518126258Smlaier *rsm = ruleset; 3519126258Smlaier if ((*rm)->quick) 3520126258Smlaier break; 3521126258Smlaier r = TAILQ_NEXT(r, entries); 3522126258Smlaier } else 3523145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3524145836Smlaier PF_RULESET_FILTER, &r, &a); 3525126258Smlaier } 3526145836Smlaier if (r == NULL) 3527145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3528145836Smlaier PF_RULESET_FILTER, &r, &a); 3529126258Smlaier } 3530126258Smlaier r = *rm; 3531126258Smlaier a = *am; 3532126258Smlaier ruleset = *rsm; 3533126258Smlaier 3534126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3535126258Smlaier 3536126258Smlaier if (r->log) { 3537126258Smlaier if (rewrite) 3538126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3539130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3540126258Smlaier } 3541126258Smlaier 3542126258Smlaier if ((r->action == PF_DROP) && 3543126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 3544126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3545126258Smlaier /* undo NAT changes, if they have taken place */ 3546130613Smlaier if (nr != NULL) { 3547130613Smlaier if (direction == PF_OUT) { 3548130613Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3549130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3550130613Smlaier rewrite++; 3551130613Smlaier } else { 3552130613Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3553130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3554130613Smlaier rewrite++; 3555130613Smlaier } 3556126258Smlaier } 3557126258Smlaier if ((af == AF_INET) && r->return_icmp) 3558126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3559126258Smlaier r->return_icmp & 255, af, r); 3560126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3561126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3562126258Smlaier r->return_icmp6 & 255, af, r); 3563126258Smlaier } 3564126258Smlaier 3565126258Smlaier if (r->action == PF_DROP) 3566126258Smlaier return (PF_DROP); 3567126258Smlaier 3568126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3569126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3570126258Smlaier return (PF_DROP); 3571126258Smlaier } 3572126258Smlaier 3573130613Smlaier if (r->keep_state || nr != NULL) { 3574126258Smlaier /* create new state */ 3575126258Smlaier struct pf_state *s = NULL; 3576130613Smlaier struct pf_src_node *sn = NULL; 3577126258Smlaier 3578130613Smlaier /* check maximums */ 3579145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3580145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3581145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3582130613Smlaier goto cleanup; 3583145836Smlaier } 3584130613Smlaier /* src node for flter rule */ 3585130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3586130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3587145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3588145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3589130613Smlaier goto cleanup; 3590145836Smlaier } 3591130613Smlaier /* src node for translation rule */ 3592130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3593130613Smlaier ((direction == PF_OUT && 3594130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3595145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3596145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3597130613Smlaier goto cleanup; 3598145836Smlaier } 3599130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3600126258Smlaier if (s == NULL) { 3601145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3602130613Smlaiercleanup: 3603130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3604130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3605130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3606130613Smlaier pf_status.src_nodes--; 3607130613Smlaier pool_put(&pf_src_tree_pl, sn); 3608130613Smlaier } 3609130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3610130613Smlaier nsn->expire == 0) { 3611130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3612130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3613130613Smlaier pf_status.src_nodes--; 3614130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3615130613Smlaier } 3616126258Smlaier return (PF_DROP); 3617126258Smlaier } 3618126258Smlaier bzero(s, sizeof(*s)); 3619126258Smlaier s->rule.ptr = r; 3620130613Smlaier s->nat_rule.ptr = nr; 3621126258Smlaier s->anchor.ptr = a; 3622145836Smlaier STATE_INC_COUNTERS(s); 3623126258Smlaier s->allow_opts = r->allow_opts; 3624126258Smlaier s->log = r->log & 2; 3625126258Smlaier s->proto = IPPROTO_UDP; 3626126258Smlaier s->direction = direction; 3627126258Smlaier s->af = af; 3628126258Smlaier if (direction == PF_OUT) { 3629126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3630126258Smlaier s->gwy.port = uh->uh_sport; 3631126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3632126258Smlaier s->ext.port = uh->uh_dport; 3633130613Smlaier if (nr != NULL) { 3634130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3635126258Smlaier s->lan.port = bport; 3636126258Smlaier } else { 3637126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3638126258Smlaier s->lan.port = s->gwy.port; 3639126258Smlaier } 3640126258Smlaier } else { 3641126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3642126258Smlaier s->lan.port = uh->uh_dport; 3643126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3644126258Smlaier s->ext.port = uh->uh_sport; 3645130613Smlaier if (nr != NULL) { 3646130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3647126258Smlaier s->gwy.port = bport; 3648126258Smlaier } else { 3649126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3650126258Smlaier s->gwy.port = s->lan.port; 3651126258Smlaier } 3652126258Smlaier } 3653126258Smlaier s->src.state = PFUDPS_SINGLE; 3654126258Smlaier s->dst.state = PFUDPS_NO_TRAFFIC; 3655126261Smlaier s->creation = time_second; 3656126261Smlaier s->expire = time_second; 3657126258Smlaier s->timeout = PFTM_UDP_FIRST_PACKET; 3658126258Smlaier pf_set_rt_ifp(s, saddr); 3659130613Smlaier if (sn != NULL) { 3660130613Smlaier s->src_node = sn; 3661130613Smlaier s->src_node->states++; 3662130613Smlaier } 3663130613Smlaier if (nsn != NULL) { 3664130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3665130613Smlaier s->nat_src_node = nsn; 3666130613Smlaier s->nat_src_node->states++; 3667130613Smlaier } 3668130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3669145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3670130613Smlaier pf_src_tree_remove_state(s); 3671145836Smlaier STATE_DEC_COUNTERS(s); 3672126258Smlaier pool_put(&pf_state_pl, s); 3673126258Smlaier return (PF_DROP); 3674126258Smlaier } else 3675126258Smlaier *sm = s; 3676145836Smlaier if (tag > 0) { 3677145836Smlaier pf_tag_ref(tag); 3678145836Smlaier s->tag = tag; 3679145836Smlaier } 3680126258Smlaier } 3681126258Smlaier 3682126258Smlaier /* copy back packet headers if we performed NAT operations */ 3683126258Smlaier if (rewrite) 3684126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3685126258Smlaier 3686126258Smlaier return (PF_PASS); 3687126258Smlaier} 3688126258Smlaier 3689126258Smlaierint 3690126258Smlaierpf_test_icmp(struct pf_rule **rm, struct pf_state **sm, int direction, 3691130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3692145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3693145836Smlaier struct ifqueue *ifq) 3694126258Smlaier{ 3695130613Smlaier struct pf_rule *nr = NULL; 3696126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3697126258Smlaier struct pf_rule *r, *a = NULL; 3698126258Smlaier struct pf_ruleset *ruleset = NULL; 3699130613Smlaier struct pf_src_node *nsn = NULL; 3700126258Smlaier u_short reason; 3701149893Smlaier u_int16_t icmpid = 0, bport, nport = 0; 3702126258Smlaier sa_family_t af = pd->af; 3703127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 3704127629Smlaier u_int8_t icmpcode = 0; /* make the compiler happy */ 3705126258Smlaier int state_icmp = 0; 3706126258Smlaier struct pf_tag *pftag = NULL; 3707126258Smlaier int tag = -1; 3708126258Smlaier#ifdef INET6 3709126258Smlaier int rewrite = 0; 3710126258Smlaier#endif /* INET6 */ 3711145836Smlaier int asd = 0; 3712126258Smlaier 3713145836Smlaier if (pf_check_congestion(ifq)) { 3714145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3715145836Smlaier return (PF_DROP); 3716145836Smlaier } 3717145836Smlaier 3718126258Smlaier switch (pd->proto) { 3719126258Smlaier#ifdef INET 3720126258Smlaier case IPPROTO_ICMP: 3721126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 3722126258Smlaier icmpcode = pd->hdr.icmp->icmp_code; 3723126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 3724126258Smlaier 3725126258Smlaier if (icmptype == ICMP_UNREACH || 3726126258Smlaier icmptype == ICMP_SOURCEQUENCH || 3727126258Smlaier icmptype == ICMP_REDIRECT || 3728126258Smlaier icmptype == ICMP_TIMXCEED || 3729126258Smlaier icmptype == ICMP_PARAMPROB) 3730126258Smlaier state_icmp++; 3731126258Smlaier break; 3732126258Smlaier#endif /* INET */ 3733126258Smlaier#ifdef INET6 3734126258Smlaier case IPPROTO_ICMPV6: 3735126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 3736126258Smlaier icmpcode = pd->hdr.icmp6->icmp6_code; 3737126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 3738126258Smlaier 3739126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 3740126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 3741126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 3742126258Smlaier icmptype == ICMP6_PARAM_PROB) 3743126258Smlaier state_icmp++; 3744126258Smlaier break; 3745126258Smlaier#endif /* INET6 */ 3746126258Smlaier } 3747126258Smlaier 3748126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3749126258Smlaier 3750126258Smlaier if (direction == PF_OUT) { 3751149884Smlaier bport = nport = icmpid; 3752126258Smlaier /* check outgoing packet for BINAT/NAT */ 3753130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3754149884Smlaier saddr, icmpid, daddr, icmpid, &pd->naddr, &nport)) != 3755149884Smlaier NULL) { 3756130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3757126258Smlaier switch (af) { 3758126258Smlaier#ifdef INET 3759126258Smlaier case AF_INET: 3760126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 3761130613Smlaier pd->naddr.v4.s_addr, 0); 3762149884Smlaier pd->hdr.icmp->icmp_cksum = pf_cksum_fixup( 3763149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, nport, 0); 3764149884Smlaier pd->hdr.icmp->icmp_id = nport; 3765149893Smlaier m_copyback(m, off, ICMP_MINLEN, 3766149893Smlaier (caddr_t)pd->hdr.icmp); 3767126258Smlaier break; 3768126258Smlaier#endif /* INET */ 3769126258Smlaier#ifdef INET6 3770126258Smlaier case AF_INET6: 3771126258Smlaier pf_change_a6(saddr, &pd->hdr.icmp6->icmp6_cksum, 3772130613Smlaier &pd->naddr, 0); 3773126258Smlaier rewrite++; 3774126258Smlaier break; 3775126258Smlaier#endif /* INET6 */ 3776126258Smlaier } 3777130613Smlaier if (nr->natpass) 3778126258Smlaier r = NULL; 3779130613Smlaier pd->nat_rule = nr; 3780126258Smlaier } 3781126258Smlaier } else { 3782149884Smlaier bport = nport = icmpid; 3783126258Smlaier /* check incoming packet for BINAT/RDR */ 3784130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3785149884Smlaier saddr, icmpid, daddr, icmpid, &pd->naddr, &nport)) != 3786149884Smlaier NULL) { 3787130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3788126258Smlaier switch (af) { 3789126258Smlaier#ifdef INET 3790126258Smlaier case AF_INET: 3791126258Smlaier pf_change_a(&daddr->v4.s_addr, 3792130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 3793126258Smlaier break; 3794126258Smlaier#endif /* INET */ 3795126258Smlaier#ifdef INET6 3796126258Smlaier case AF_INET6: 3797126258Smlaier pf_change_a6(daddr, &pd->hdr.icmp6->icmp6_cksum, 3798130613Smlaier &pd->naddr, 0); 3799126258Smlaier rewrite++; 3800126258Smlaier break; 3801126258Smlaier#endif /* INET6 */ 3802126258Smlaier } 3803130613Smlaier if (nr->natpass) 3804126258Smlaier r = NULL; 3805130613Smlaier pd->nat_rule = nr; 3806126258Smlaier } 3807126258Smlaier } 3808126258Smlaier 3809126258Smlaier while (r != NULL) { 3810126258Smlaier r->evaluations++; 3811130613Smlaier if (r->kif != NULL && 3812130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3813126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3814126258Smlaier else if (r->direction && r->direction != direction) 3815126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3816126258Smlaier else if (r->af && r->af != af) 3817126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3818126258Smlaier else if (r->proto && r->proto != pd->proto) 3819126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3820145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3821126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3822145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3823126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3824126258Smlaier else if (r->type && r->type != icmptype + 1) 3825126258Smlaier r = TAILQ_NEXT(r, entries); 3826126258Smlaier else if (r->code && r->code != icmpcode + 1) 3827126258Smlaier r = TAILQ_NEXT(r, entries); 3828126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3829126258Smlaier r = TAILQ_NEXT(r, entries); 3830126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3831126258Smlaier r = TAILQ_NEXT(r, entries); 3832145836Smlaier else if (r->prob && r->prob <= arc4random()) 3833126258Smlaier r = TAILQ_NEXT(r, entries); 3834145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3835126258Smlaier r = TAILQ_NEXT(r, entries); 3836126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3837126258Smlaier r = TAILQ_NEXT(r, entries); 3838126258Smlaier else { 3839126258Smlaier if (r->tag) 3840126258Smlaier tag = r->tag; 3841126258Smlaier if (r->anchor == NULL) { 3842126258Smlaier *rm = r; 3843126258Smlaier *am = a; 3844126258Smlaier *rsm = ruleset; 3845126258Smlaier if ((*rm)->quick) 3846126258Smlaier break; 3847126258Smlaier r = TAILQ_NEXT(r, entries); 3848126258Smlaier } else 3849145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3850145836Smlaier PF_RULESET_FILTER, &r, &a); 3851126258Smlaier } 3852145836Smlaier if (r == NULL) 3853145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3854145836Smlaier PF_RULESET_FILTER, &r, &a); 3855126258Smlaier } 3856126258Smlaier r = *rm; 3857126258Smlaier a = *am; 3858126258Smlaier ruleset = *rsm; 3859126258Smlaier 3860126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3861126258Smlaier 3862126258Smlaier if (r->log) { 3863126258Smlaier#ifdef INET6 3864126258Smlaier if (rewrite) 3865126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3866126261Smlaier (caddr_t)pd->hdr.icmp6); 3867126258Smlaier#endif /* INET6 */ 3868130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3869126258Smlaier } 3870126258Smlaier 3871126258Smlaier if (r->action != PF_PASS) 3872126258Smlaier return (PF_DROP); 3873126258Smlaier 3874126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3875126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3876126258Smlaier return (PF_DROP); 3877126258Smlaier } 3878126258Smlaier 3879130613Smlaier if (!state_icmp && (r->keep_state || nr != NULL)) { 3880126258Smlaier /* create new state */ 3881126258Smlaier struct pf_state *s = NULL; 3882130613Smlaier struct pf_src_node *sn = NULL; 3883126258Smlaier 3884130613Smlaier /* check maximums */ 3885145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3886145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3887145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3888130613Smlaier goto cleanup; 3889145836Smlaier } 3890130613Smlaier /* src node for flter rule */ 3891130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3892130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3893145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3894145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3895130613Smlaier goto cleanup; 3896145836Smlaier } 3897130613Smlaier /* src node for translation rule */ 3898130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3899130613Smlaier ((direction == PF_OUT && 3900130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3901145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3902145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3903130613Smlaier goto cleanup; 3904145836Smlaier } 3905130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3906126258Smlaier if (s == NULL) { 3907145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3908130613Smlaiercleanup: 3909130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3910130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3911130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3912130613Smlaier pf_status.src_nodes--; 3913130613Smlaier pool_put(&pf_src_tree_pl, sn); 3914130613Smlaier } 3915130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3916130613Smlaier nsn->expire == 0) { 3917130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3918130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3919130613Smlaier pf_status.src_nodes--; 3920130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3921130613Smlaier } 3922126258Smlaier return (PF_DROP); 3923126258Smlaier } 3924126258Smlaier bzero(s, sizeof(*s)); 3925126258Smlaier s->rule.ptr = r; 3926130613Smlaier s->nat_rule.ptr = nr; 3927126258Smlaier s->anchor.ptr = a; 3928145836Smlaier STATE_INC_COUNTERS(s); 3929126258Smlaier s->allow_opts = r->allow_opts; 3930126258Smlaier s->log = r->log & 2; 3931126258Smlaier s->proto = pd->proto; 3932126258Smlaier s->direction = direction; 3933126258Smlaier s->af = af; 3934126258Smlaier if (direction == PF_OUT) { 3935126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3936149884Smlaier s->gwy.port = nport; 3937126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3938149884Smlaier s->ext.port = 0; 3939149884Smlaier if (nr != NULL) { 3940130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3941149884Smlaier s->lan.port = bport; 3942149884Smlaier } else { 3943126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3944149884Smlaier s->lan.port = s->gwy.port; 3945149884Smlaier } 3946126258Smlaier } else { 3947126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3948149884Smlaier s->lan.port = nport; 3949126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3950149884Smlaier s->ext.port = 0; 3951149884Smlaier if (nr != NULL) { 3952130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3953149884Smlaier s->gwy.port = bport; 3954149884Smlaier } else { 3955126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3956149884Smlaier s->gwy.port = s->lan.port; 3957149884Smlaier } 3958126258Smlaier } 3959126261Smlaier s->creation = time_second; 3960126261Smlaier s->expire = time_second; 3961126258Smlaier s->timeout = PFTM_ICMP_FIRST_PACKET; 3962126258Smlaier pf_set_rt_ifp(s, saddr); 3963130613Smlaier if (sn != NULL) { 3964130613Smlaier s->src_node = sn; 3965130613Smlaier s->src_node->states++; 3966130613Smlaier } 3967130613Smlaier if (nsn != NULL) { 3968130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3969130613Smlaier s->nat_src_node = nsn; 3970130613Smlaier s->nat_src_node->states++; 3971130613Smlaier } 3972130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3973145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3974130613Smlaier pf_src_tree_remove_state(s); 3975145836Smlaier STATE_DEC_COUNTERS(s); 3976126258Smlaier pool_put(&pf_state_pl, s); 3977126258Smlaier return (PF_DROP); 3978126258Smlaier } else 3979126258Smlaier *sm = s; 3980145836Smlaier if (tag > 0) { 3981145836Smlaier pf_tag_ref(tag); 3982145836Smlaier s->tag = tag; 3983145836Smlaier } 3984126258Smlaier } 3985126258Smlaier 3986126258Smlaier#ifdef INET6 3987126258Smlaier /* copy back packet headers if we performed IPv6 NAT operations */ 3988126258Smlaier if (rewrite) 3989126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3990126261Smlaier (caddr_t)pd->hdr.icmp6); 3991126258Smlaier#endif /* INET6 */ 3992126258Smlaier 3993126258Smlaier return (PF_PASS); 3994126258Smlaier} 3995126258Smlaier 3996126258Smlaierint 3997126258Smlaierpf_test_other(struct pf_rule **rm, struct pf_state **sm, int direction, 3998130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 3999145836Smlaier struct pf_rule **am, struct pf_ruleset **rsm, struct ifqueue *ifq) 4000126258Smlaier{ 4001130613Smlaier struct pf_rule *nr = NULL; 4002126258Smlaier struct pf_rule *r, *a = NULL; 4003126258Smlaier struct pf_ruleset *ruleset = NULL; 4004130613Smlaier struct pf_src_node *nsn = NULL; 4005126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4006126258Smlaier sa_family_t af = pd->af; 4007126258Smlaier u_short reason; 4008126258Smlaier struct pf_tag *pftag = NULL; 4009126258Smlaier int tag = -1; 4010145836Smlaier int asd = 0; 4011126258Smlaier 4012145836Smlaier if (pf_check_congestion(ifq)) { 4013145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 4014145836Smlaier return (PF_DROP); 4015145836Smlaier } 4016145836Smlaier 4017126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4018126258Smlaier 4019126258Smlaier if (direction == PF_OUT) { 4020126258Smlaier /* check outgoing packet for BINAT/NAT */ 4021130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 4022130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 4023130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 4024126258Smlaier switch (af) { 4025126258Smlaier#ifdef INET 4026126258Smlaier case AF_INET: 4027126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 4028130613Smlaier pd->naddr.v4.s_addr, 0); 4029126258Smlaier break; 4030126258Smlaier#endif /* INET */ 4031126258Smlaier#ifdef INET6 4032126258Smlaier case AF_INET6: 4033130613Smlaier PF_ACPY(saddr, &pd->naddr, af); 4034126258Smlaier break; 4035126258Smlaier#endif /* INET6 */ 4036126258Smlaier } 4037130613Smlaier if (nr->natpass) 4038126258Smlaier r = NULL; 4039130613Smlaier pd->nat_rule = nr; 4040126258Smlaier } 4041126258Smlaier } else { 4042126258Smlaier /* check incoming packet for BINAT/RDR */ 4043130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 4044130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 4045130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 4046126258Smlaier switch (af) { 4047126258Smlaier#ifdef INET 4048126258Smlaier case AF_INET: 4049126258Smlaier pf_change_a(&daddr->v4.s_addr, 4050130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 4051126258Smlaier break; 4052126258Smlaier#endif /* INET */ 4053126258Smlaier#ifdef INET6 4054126258Smlaier case AF_INET6: 4055130613Smlaier PF_ACPY(daddr, &pd->naddr, af); 4056126258Smlaier break; 4057126258Smlaier#endif /* INET6 */ 4058126258Smlaier } 4059130613Smlaier if (nr->natpass) 4060126258Smlaier r = NULL; 4061130613Smlaier pd->nat_rule = nr; 4062126258Smlaier } 4063126258Smlaier } 4064126258Smlaier 4065126258Smlaier while (r != NULL) { 4066126258Smlaier r->evaluations++; 4067130613Smlaier if (r->kif != NULL && 4068130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 4069126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4070126258Smlaier else if (r->direction && r->direction != direction) 4071126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4072126258Smlaier else if (r->af && r->af != af) 4073126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4074126258Smlaier else if (r->proto && r->proto != pd->proto) 4075126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4076145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.neg)) 4077126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4078145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.neg)) 4079126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4080126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 4081126258Smlaier r = TAILQ_NEXT(r, entries); 4082126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 4083126258Smlaier r = TAILQ_NEXT(r, entries); 4084145836Smlaier else if (r->prob && r->prob <= arc4random()) 4085126258Smlaier r = TAILQ_NEXT(r, entries); 4086145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 4087126258Smlaier r = TAILQ_NEXT(r, entries); 4088126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 4089126258Smlaier r = TAILQ_NEXT(r, entries); 4090126258Smlaier else { 4091126258Smlaier if (r->tag) 4092126258Smlaier tag = r->tag; 4093126258Smlaier if (r->anchor == NULL) { 4094126258Smlaier *rm = r; 4095126258Smlaier *am = a; 4096126258Smlaier *rsm = ruleset; 4097126258Smlaier if ((*rm)->quick) 4098126258Smlaier break; 4099126258Smlaier r = TAILQ_NEXT(r, entries); 4100126258Smlaier } else 4101145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4102145836Smlaier PF_RULESET_FILTER, &r, &a); 4103126258Smlaier } 4104145836Smlaier if (r == NULL) 4105145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 4106145836Smlaier PF_RULESET_FILTER, &r, &a); 4107126258Smlaier } 4108126258Smlaier r = *rm; 4109126258Smlaier a = *am; 4110126258Smlaier ruleset = *rsm; 4111126258Smlaier 4112126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4113130613Smlaier 4114126258Smlaier if (r->log) 4115130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 4116126258Smlaier 4117126258Smlaier if ((r->action == PF_DROP) && 4118126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 4119126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 4120126258Smlaier struct pf_addr *a = NULL; 4121126258Smlaier 4122130613Smlaier if (nr != NULL) { 4123130613Smlaier if (direction == PF_OUT) 4124130613Smlaier a = saddr; 4125130613Smlaier else 4126130613Smlaier a = daddr; 4127130613Smlaier } 4128126258Smlaier if (a != NULL) { 4129126258Smlaier switch (af) { 4130126258Smlaier#ifdef INET 4131126258Smlaier case AF_INET: 4132126258Smlaier pf_change_a(&a->v4.s_addr, pd->ip_sum, 4133130613Smlaier pd->baddr.v4.s_addr, 0); 4134126258Smlaier break; 4135126258Smlaier#endif /* INET */ 4136126258Smlaier#ifdef INET6 4137126258Smlaier case AF_INET6: 4138130613Smlaier PF_ACPY(a, &pd->baddr, af); 4139126258Smlaier break; 4140126258Smlaier#endif /* INET6 */ 4141126258Smlaier } 4142126258Smlaier } 4143126258Smlaier if ((af == AF_INET) && r->return_icmp) 4144126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 4145126258Smlaier r->return_icmp & 255, af, r); 4146126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 4147126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 4148126258Smlaier r->return_icmp6 & 255, af, r); 4149126258Smlaier } 4150126258Smlaier 4151126258Smlaier if (r->action != PF_PASS) 4152126258Smlaier return (PF_DROP); 4153126258Smlaier 4154126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 4155126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4156126258Smlaier return (PF_DROP); 4157126258Smlaier } 4158126258Smlaier 4159130613Smlaier if (r->keep_state || nr != NULL) { 4160126258Smlaier /* create new state */ 4161126258Smlaier struct pf_state *s = NULL; 4162130613Smlaier struct pf_src_node *sn = NULL; 4163126258Smlaier 4164130613Smlaier /* check maximums */ 4165145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 4166145836Smlaier pf_status.lcounters[LCNT_STATES]++; 4167145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 4168130613Smlaier goto cleanup; 4169145836Smlaier } 4170130613Smlaier /* src node for flter rule */ 4171130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 4172130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 4173145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 4174145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4175130613Smlaier goto cleanup; 4176145836Smlaier } 4177130613Smlaier /* src node for translation rule */ 4178130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 4179130613Smlaier ((direction == PF_OUT && 4180130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 4181145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 4182145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4183130613Smlaier goto cleanup; 4184145836Smlaier } 4185130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 4186126258Smlaier if (s == NULL) { 4187145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 4188130613Smlaiercleanup: 4189130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 4190130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 4191130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4192130613Smlaier pf_status.src_nodes--; 4193130613Smlaier pool_put(&pf_src_tree_pl, sn); 4194130613Smlaier } 4195130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 4196130613Smlaier nsn->expire == 0) { 4197130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 4198130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4199130613Smlaier pf_status.src_nodes--; 4200130613Smlaier pool_put(&pf_src_tree_pl, nsn); 4201130613Smlaier } 4202126258Smlaier return (PF_DROP); 4203126258Smlaier } 4204126258Smlaier bzero(s, sizeof(*s)); 4205126258Smlaier s->rule.ptr = r; 4206130613Smlaier s->nat_rule.ptr = nr; 4207126258Smlaier s->anchor.ptr = a; 4208145836Smlaier STATE_INC_COUNTERS(s); 4209126258Smlaier s->allow_opts = r->allow_opts; 4210126258Smlaier s->log = r->log & 2; 4211126258Smlaier s->proto = pd->proto; 4212126258Smlaier s->direction = direction; 4213126258Smlaier s->af = af; 4214126258Smlaier if (direction == PF_OUT) { 4215126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 4216126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 4217130613Smlaier if (nr != NULL) 4218130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 4219126258Smlaier else 4220126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 4221126258Smlaier } else { 4222126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 4223126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 4224130613Smlaier if (nr != NULL) 4225130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 4226126258Smlaier else 4227126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 4228126258Smlaier } 4229126258Smlaier s->src.state = PFOTHERS_SINGLE; 4230126258Smlaier s->dst.state = PFOTHERS_NO_TRAFFIC; 4231126261Smlaier s->creation = time_second; 4232126261Smlaier s->expire = time_second; 4233126258Smlaier s->timeout = PFTM_OTHER_FIRST_PACKET; 4234126258Smlaier pf_set_rt_ifp(s, saddr); 4235130613Smlaier if (sn != NULL) { 4236130613Smlaier s->src_node = sn; 4237130613Smlaier s->src_node->states++; 4238130613Smlaier } 4239130613Smlaier if (nsn != NULL) { 4240130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 4241130613Smlaier s->nat_src_node = nsn; 4242130613Smlaier s->nat_src_node->states++; 4243130613Smlaier } 4244130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 4245145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 4246130613Smlaier pf_src_tree_remove_state(s); 4247145836Smlaier STATE_DEC_COUNTERS(s); 4248126258Smlaier pool_put(&pf_state_pl, s); 4249126258Smlaier return (PF_DROP); 4250126258Smlaier } else 4251126258Smlaier *sm = s; 4252145836Smlaier if (tag > 0) { 4253145836Smlaier pf_tag_ref(tag); 4254145836Smlaier s->tag = tag; 4255145836Smlaier } 4256126258Smlaier } 4257126258Smlaier 4258126258Smlaier return (PF_PASS); 4259126258Smlaier} 4260126258Smlaier 4261126258Smlaierint 4262130613Smlaierpf_test_fragment(struct pf_rule **rm, int direction, struct pfi_kif *kif, 4263126258Smlaier struct mbuf *m, void *h, struct pf_pdesc *pd, struct pf_rule **am, 4264126258Smlaier struct pf_ruleset **rsm) 4265126258Smlaier{ 4266126258Smlaier struct pf_rule *r, *a = NULL; 4267126258Smlaier struct pf_ruleset *ruleset = NULL; 4268126258Smlaier sa_family_t af = pd->af; 4269126258Smlaier u_short reason; 4270126258Smlaier struct pf_tag *pftag = NULL; 4271126258Smlaier int tag = -1; 4272145836Smlaier int asd = 0; 4273126258Smlaier 4274126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4275126258Smlaier while (r != NULL) { 4276126258Smlaier r->evaluations++; 4277130613Smlaier if (r->kif != NULL && 4278130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 4279126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4280126258Smlaier else if (r->direction && r->direction != direction) 4281126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4282126258Smlaier else if (r->af && r->af != af) 4283126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4284126258Smlaier else if (r->proto && r->proto != pd->proto) 4285126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4286145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.neg)) 4287126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4288145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.neg)) 4289126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4290126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 4291126258Smlaier r = TAILQ_NEXT(r, entries); 4292126258Smlaier else if (r->src.port_op || r->dst.port_op || 4293126258Smlaier r->flagset || r->type || r->code || 4294126258Smlaier r->os_fingerprint != PF_OSFP_ANY) 4295126258Smlaier r = TAILQ_NEXT(r, entries); 4296145836Smlaier else if (r->prob && r->prob <= arc4random()) 4297126258Smlaier r = TAILQ_NEXT(r, entries); 4298145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 4299126258Smlaier r = TAILQ_NEXT(r, entries); 4300126258Smlaier else { 4301126258Smlaier if (r->anchor == NULL) { 4302126258Smlaier *rm = r; 4303126258Smlaier *am = a; 4304126258Smlaier *rsm = ruleset; 4305126258Smlaier if ((*rm)->quick) 4306126258Smlaier break; 4307126258Smlaier r = TAILQ_NEXT(r, entries); 4308126258Smlaier } else 4309145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4310145836Smlaier PF_RULESET_FILTER, &r, &a); 4311126258Smlaier } 4312145836Smlaier if (r == NULL) 4313145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 4314145836Smlaier PF_RULESET_FILTER, &r, &a); 4315126258Smlaier } 4316126258Smlaier r = *rm; 4317126258Smlaier a = *am; 4318126258Smlaier ruleset = *rsm; 4319126258Smlaier 4320126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4321130613Smlaier 4322126258Smlaier if (r->log) 4323130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 4324126258Smlaier 4325126258Smlaier if (r->action != PF_PASS) 4326126258Smlaier return (PF_DROP); 4327126258Smlaier 4328126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 4329126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4330126258Smlaier return (PF_DROP); 4331126258Smlaier } 4332126258Smlaier 4333126258Smlaier return (PF_PASS); 4334126258Smlaier} 4335126258Smlaier 4336126258Smlaierint 4337130613Smlaierpf_test_state_tcp(struct pf_state **state, int direction, struct pfi_kif *kif, 4338130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 4339126258Smlaier u_short *reason) 4340126258Smlaier{ 4341130613Smlaier struct pf_state key; 4342126258Smlaier struct tcphdr *th = pd->hdr.tcp; 4343126258Smlaier u_int16_t win = ntohs(th->th_win); 4344145836Smlaier u_int32_t ack, end, seq, orig_seq; 4345126258Smlaier u_int8_t sws, dws; 4346130613Smlaier int ackskew; 4347126258Smlaier int copyback = 0; 4348126258Smlaier struct pf_state_peer *src, *dst; 4349126258Smlaier 4350126258Smlaier key.af = pd->af; 4351126258Smlaier key.proto = IPPROTO_TCP; 4352130613Smlaier if (direction == PF_IN) { 4353130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4354130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4355130613Smlaier key.ext.port = th->th_sport; 4356130613Smlaier key.gwy.port = th->th_dport; 4357130613Smlaier } else { 4358130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4359130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4360130613Smlaier key.lan.port = th->th_sport; 4361130613Smlaier key.ext.port = th->th_dport; 4362130613Smlaier } 4363126258Smlaier 4364126258Smlaier STATE_LOOKUP(); 4365126258Smlaier 4366126258Smlaier if (direction == (*state)->direction) { 4367126258Smlaier src = &(*state)->src; 4368126258Smlaier dst = &(*state)->dst; 4369126258Smlaier } else { 4370126258Smlaier src = &(*state)->dst; 4371126258Smlaier dst = &(*state)->src; 4372126258Smlaier } 4373126258Smlaier 4374126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_SRC) { 4375145836Smlaier if (direction != (*state)->direction) { 4376145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4377126258Smlaier return (PF_SYNPROXY_DROP); 4378145836Smlaier } 4379126258Smlaier if (th->th_flags & TH_SYN) { 4380145836Smlaier if (ntohl(th->th_seq) != (*state)->src.seqlo) { 4381145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4382126258Smlaier return (PF_DROP); 4383145836Smlaier } 4384162238Scsjp#ifdef __FreeBSD__ 4385162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, pd->dst, 4386162238Scsjp#else 4387126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4388162238Scsjp#endif 4389126258Smlaier pd->src, th->th_dport, th->th_sport, 4390126258Smlaier (*state)->src.seqhi, ntohl(th->th_seq) + 1, 4391145836Smlaier TH_SYN|TH_ACK, 0, (*state)->src.mss, 0, 1, 4392145836Smlaier NULL, NULL); 4393145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4394126258Smlaier return (PF_SYNPROXY_DROP); 4395126258Smlaier } else if (!(th->th_flags & TH_ACK) || 4396126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4397145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4398145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4399126258Smlaier return (PF_DROP); 4400145836Smlaier } else if ((*state)->src_node != NULL && 4401145836Smlaier pf_src_connlimit(state)) { 4402145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 4403145836Smlaier return (PF_DROP); 4404145836Smlaier } else 4405126258Smlaier (*state)->src.state = PF_TCPS_PROXY_DST; 4406126258Smlaier } 4407126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_DST) { 4408126258Smlaier struct pf_state_host *src, *dst; 4409126258Smlaier 4410126258Smlaier if (direction == PF_OUT) { 4411126258Smlaier src = &(*state)->gwy; 4412126258Smlaier dst = &(*state)->ext; 4413126258Smlaier } else { 4414126258Smlaier src = &(*state)->ext; 4415126258Smlaier dst = &(*state)->lan; 4416126258Smlaier } 4417126258Smlaier if (direction == (*state)->direction) { 4418126258Smlaier if (((th->th_flags & (TH_SYN|TH_ACK)) != TH_ACK) || 4419126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4420145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4421145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4422126258Smlaier return (PF_DROP); 4423145836Smlaier } 4424126258Smlaier (*state)->src.max_win = MAX(ntohs(th->th_win), 1); 4425126258Smlaier if ((*state)->dst.seqhi == 1) 4426145836Smlaier (*state)->dst.seqhi = htonl(arc4random()); 4427162238Scsjp#ifdef __FreeBSD__ 4428162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, 4429162238Scsjp &src->addr, 4430162238Scsjp#else 4431126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4432162238Scsjp#endif 4433126258Smlaier &dst->addr, src->port, dst->port, 4434130613Smlaier (*state)->dst.seqhi, 0, TH_SYN, 0, 4435145836Smlaier (*state)->src.mss, 0, 0, NULL, NULL); 4436145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4437126258Smlaier return (PF_SYNPROXY_DROP); 4438126258Smlaier } else if (((th->th_flags & (TH_SYN|TH_ACK)) != 4439126258Smlaier (TH_SYN|TH_ACK)) || 4440145836Smlaier (ntohl(th->th_ack) != (*state)->dst.seqhi + 1)) { 4441145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4442126258Smlaier return (PF_DROP); 4443145836Smlaier } else { 4444126258Smlaier (*state)->dst.max_win = MAX(ntohs(th->th_win), 1); 4445126258Smlaier (*state)->dst.seqlo = ntohl(th->th_seq); 4446162238Scsjp#ifdef __FreeBSD__ 4447162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, pd->dst, 4448162238Scsjp#else 4449126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4450162238Scsjp#endif 4451126258Smlaier pd->src, th->th_dport, th->th_sport, 4452126258Smlaier ntohl(th->th_ack), ntohl(th->th_seq) + 1, 4453145836Smlaier TH_ACK, (*state)->src.max_win, 0, 0, 0, 4454145836Smlaier NULL, NULL); 4455162238Scsjp#ifdef __FreeBSD__ 4456162238Scsjp pf_send_tcp(NULL, (*state)->rule.ptr, pd->af, 4457162238Scsjp &src->addr, 4458162238Scsjp#else 4459126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4460162238Scsjp#endif 4461126258Smlaier &dst->addr, src->port, dst->port, 4462126258Smlaier (*state)->src.seqhi + 1, (*state)->src.seqlo + 1, 4463145836Smlaier TH_ACK, (*state)->dst.max_win, 0, 0, 1, 4464145836Smlaier NULL, NULL); 4465126258Smlaier (*state)->src.seqdiff = (*state)->dst.seqhi - 4466126258Smlaier (*state)->src.seqlo; 4467126258Smlaier (*state)->dst.seqdiff = (*state)->src.seqhi - 4468126258Smlaier (*state)->dst.seqlo; 4469126258Smlaier (*state)->src.seqhi = (*state)->src.seqlo + 4470145875Smlaier (*state)->dst.max_win; 4471145875Smlaier (*state)->dst.seqhi = (*state)->dst.seqlo + 4472145836Smlaier (*state)->src.max_win; 4473126258Smlaier (*state)->src.wscale = (*state)->dst.wscale = 0; 4474126258Smlaier (*state)->src.state = (*state)->dst.state = 4475126258Smlaier TCPS_ESTABLISHED; 4476145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4477126258Smlaier return (PF_SYNPROXY_DROP); 4478126258Smlaier } 4479126258Smlaier } 4480126258Smlaier 4481126258Smlaier if (src->wscale && dst->wscale && !(th->th_flags & TH_SYN)) { 4482126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4483126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4484126258Smlaier } else 4485126258Smlaier sws = dws = 0; 4486126258Smlaier 4487126258Smlaier /* 4488126258Smlaier * Sequence tracking algorithm from Guido van Rooij's paper: 4489126258Smlaier * http://www.madison-gurkha.com/publications/tcp_filtering/ 4490126258Smlaier * tcp_filtering.ps 4491126258Smlaier */ 4492126258Smlaier 4493145836Smlaier orig_seq = seq = ntohl(th->th_seq); 4494126258Smlaier if (src->seqlo == 0) { 4495126258Smlaier /* First packet from this end. Set its state */ 4496126258Smlaier 4497126258Smlaier if ((pd->flags & PFDESC_TCP_NORM || dst->scrub) && 4498126258Smlaier src->scrub == NULL) { 4499126258Smlaier if (pf_normalize_tcp_init(m, off, pd, th, src, dst)) { 4500126258Smlaier REASON_SET(reason, PFRES_MEMORY); 4501126258Smlaier return (PF_DROP); 4502126258Smlaier } 4503126258Smlaier } 4504126258Smlaier 4505126258Smlaier /* Deferred generation of sequence number modulator */ 4506126258Smlaier if (dst->seqdiff && !src->seqdiff) { 4507145836Smlaier while ((src->seqdiff = htonl(arc4random())) == 0) 4508126258Smlaier ; 4509126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4510126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4511126258Smlaier src->seqdiff), 0); 4512126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4513126258Smlaier copyback = 1; 4514126258Smlaier } else { 4515126258Smlaier ack = ntohl(th->th_ack); 4516126258Smlaier } 4517126258Smlaier 4518126258Smlaier end = seq + pd->p_len; 4519126258Smlaier if (th->th_flags & TH_SYN) { 4520126258Smlaier end++; 4521126258Smlaier if (dst->wscale & PF_WSCALE_FLAG) { 4522126258Smlaier src->wscale = pf_get_wscale(m, off, th->th_off, 4523126258Smlaier pd->af); 4524126258Smlaier if (src->wscale & PF_WSCALE_FLAG) { 4525126258Smlaier /* Remove scale factor from initial 4526126258Smlaier * window */ 4527126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4528126258Smlaier win = ((u_int32_t)win + (1 << sws) - 1) 4529126258Smlaier >> sws; 4530126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4531126258Smlaier } else { 4532126258Smlaier /* fixup other window */ 4533126258Smlaier dst->max_win <<= dst->wscale & 4534126258Smlaier PF_WSCALE_MASK; 4535126258Smlaier /* in case of a retrans SYN|ACK */ 4536126258Smlaier dst->wscale = 0; 4537126258Smlaier } 4538126258Smlaier } 4539126258Smlaier } 4540126258Smlaier if (th->th_flags & TH_FIN) 4541126258Smlaier end++; 4542126258Smlaier 4543126258Smlaier src->seqlo = seq; 4544126258Smlaier if (src->state < TCPS_SYN_SENT) 4545126258Smlaier src->state = TCPS_SYN_SENT; 4546126258Smlaier 4547126258Smlaier /* 4548126258Smlaier * May need to slide the window (seqhi may have been set by 4549126258Smlaier * the crappy stack check or if we picked up the connection 4550126258Smlaier * after establishment) 4551126258Smlaier */ 4552126258Smlaier if (src->seqhi == 1 || 4553126258Smlaier SEQ_GEQ(end + MAX(1, dst->max_win << dws), src->seqhi)) 4554126258Smlaier src->seqhi = end + MAX(1, dst->max_win << dws); 4555126258Smlaier if (win > src->max_win) 4556126258Smlaier src->max_win = win; 4557126258Smlaier 4558126258Smlaier } else { 4559126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4560126258Smlaier if (src->seqdiff) { 4561126258Smlaier /* Modulate sequence numbers */ 4562126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4563126258Smlaier src->seqdiff), 0); 4564126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4565126258Smlaier copyback = 1; 4566126258Smlaier } 4567126258Smlaier end = seq + pd->p_len; 4568126258Smlaier if (th->th_flags & TH_SYN) 4569126258Smlaier end++; 4570126258Smlaier if (th->th_flags & TH_FIN) 4571126258Smlaier end++; 4572126258Smlaier } 4573126258Smlaier 4574126258Smlaier if ((th->th_flags & TH_ACK) == 0) { 4575126258Smlaier /* Let it pass through the ack skew check */ 4576126258Smlaier ack = dst->seqlo; 4577126258Smlaier } else if ((ack == 0 && 4578126258Smlaier (th->th_flags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) || 4579126258Smlaier /* broken tcp stacks do not set ack */ 4580126258Smlaier (dst->state < TCPS_SYN_SENT)) { 4581126258Smlaier /* 4582126258Smlaier * Many stacks (ours included) will set the ACK number in an 4583126258Smlaier * FIN|ACK if the SYN times out -- no sequence to ACK. 4584126258Smlaier */ 4585126258Smlaier ack = dst->seqlo; 4586126258Smlaier } 4587126258Smlaier 4588126258Smlaier if (seq == end) { 4589126258Smlaier /* Ease sequencing restrictions on no data packets */ 4590126258Smlaier seq = src->seqlo; 4591126258Smlaier end = seq; 4592126258Smlaier } 4593126258Smlaier 4594126258Smlaier ackskew = dst->seqlo - ack; 4595126258Smlaier 4596126258Smlaier#define MAXACKWINDOW (0xffff + 1500) /* 1500 is an arbitrary fudge factor */ 4597126258Smlaier if (SEQ_GEQ(src->seqhi, end) && 4598126258Smlaier /* Last octet inside other's window space */ 4599126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) && 4600126258Smlaier /* Retrans: not more than one window back */ 4601126258Smlaier (ackskew >= -MAXACKWINDOW) && 4602126258Smlaier /* Acking not more than one reassembled fragment backwards */ 4603145836Smlaier (ackskew <= (MAXACKWINDOW << sws)) && 4604126258Smlaier /* Acking not more than one window forward */ 4605145836Smlaier ((th->th_flags & TH_RST) == 0 || orig_seq == src->seqlo || 4606145836Smlaier (pd->flags & PFDESC_IP_REAS) == 0)) { 4607145836Smlaier /* Require an exact sequence match on resets when possible */ 4608126258Smlaier 4609145836Smlaier if (dst->scrub || src->scrub) { 4610145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4611145836Smlaier *state, src, dst, ©back)) 4612145836Smlaier return (PF_DROP); 4613145836Smlaier } 4614145836Smlaier 4615126258Smlaier /* update max window */ 4616126258Smlaier if (src->max_win < win) 4617126258Smlaier src->max_win = win; 4618126258Smlaier /* synchronize sequencing */ 4619126258Smlaier if (SEQ_GT(end, src->seqlo)) 4620126258Smlaier src->seqlo = end; 4621126258Smlaier /* slide the window of what the other end can send */ 4622126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4623126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4624126258Smlaier 4625126258Smlaier 4626126258Smlaier /* update states */ 4627126258Smlaier if (th->th_flags & TH_SYN) 4628126258Smlaier if (src->state < TCPS_SYN_SENT) 4629126258Smlaier src->state = TCPS_SYN_SENT; 4630126258Smlaier if (th->th_flags & TH_FIN) 4631126258Smlaier if (src->state < TCPS_CLOSING) 4632126258Smlaier src->state = TCPS_CLOSING; 4633126258Smlaier if (th->th_flags & TH_ACK) { 4634145836Smlaier if (dst->state == TCPS_SYN_SENT) { 4635126258Smlaier dst->state = TCPS_ESTABLISHED; 4636145836Smlaier if (src->state == TCPS_ESTABLISHED && 4637145836Smlaier (*state)->src_node != NULL && 4638145836Smlaier pf_src_connlimit(state)) { 4639145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 4640145836Smlaier return (PF_DROP); 4641145836Smlaier } 4642145836Smlaier } else if (dst->state == TCPS_CLOSING) 4643126258Smlaier dst->state = TCPS_FIN_WAIT_2; 4644126258Smlaier } 4645126258Smlaier if (th->th_flags & TH_RST) 4646126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4647126258Smlaier 4648126258Smlaier /* update expire time */ 4649126261Smlaier (*state)->expire = time_second; 4650126258Smlaier if (src->state >= TCPS_FIN_WAIT_2 && 4651126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4652126258Smlaier (*state)->timeout = PFTM_TCP_CLOSED; 4653126258Smlaier else if (src->state >= TCPS_FIN_WAIT_2 || 4654126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4655126258Smlaier (*state)->timeout = PFTM_TCP_FIN_WAIT; 4656126258Smlaier else if (src->state < TCPS_ESTABLISHED || 4657126258Smlaier dst->state < TCPS_ESTABLISHED) 4658126258Smlaier (*state)->timeout = PFTM_TCP_OPENING; 4659126258Smlaier else if (src->state >= TCPS_CLOSING || 4660126258Smlaier dst->state >= TCPS_CLOSING) 4661126258Smlaier (*state)->timeout = PFTM_TCP_CLOSING; 4662126258Smlaier else 4663126258Smlaier (*state)->timeout = PFTM_TCP_ESTABLISHED; 4664126258Smlaier 4665126258Smlaier /* Fall through to PASS packet */ 4666126258Smlaier 4667126258Smlaier } else if ((dst->state < TCPS_SYN_SENT || 4668126258Smlaier dst->state >= TCPS_FIN_WAIT_2 || 4669126258Smlaier src->state >= TCPS_FIN_WAIT_2) && 4670126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) && 4671126258Smlaier /* Within a window forward of the originating packet */ 4672126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW)) { 4673126258Smlaier /* Within a window backward of the originating packet */ 4674126258Smlaier 4675126258Smlaier /* 4676126258Smlaier * This currently handles three situations: 4677126258Smlaier * 1) Stupid stacks will shotgun SYNs before their peer 4678126258Smlaier * replies. 4679126258Smlaier * 2) When PF catches an already established stream (the 4680126258Smlaier * firewall rebooted, the state table was flushed, routes 4681126258Smlaier * changed...) 4682126258Smlaier * 3) Packets get funky immediately after the connection 4683126258Smlaier * closes (this should catch Solaris spurious ACK|FINs 4684126258Smlaier * that web servers like to spew after a close) 4685126258Smlaier * 4686126258Smlaier * This must be a little more careful than the above code 4687126258Smlaier * since packet floods will also be caught here. We don't 4688126258Smlaier * update the TTL here to mitigate the damage of a packet 4689126258Smlaier * flood and so the same code can handle awkward establishment 4690126258Smlaier * and a loosened connection close. 4691126258Smlaier * In the establishment case, a correct peer response will 4692126258Smlaier * validate the connection, go through the normal state code 4693126258Smlaier * and keep updating the state TTL. 4694126258Smlaier */ 4695126258Smlaier 4696126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 4697126258Smlaier printf("pf: loose state match: "); 4698126258Smlaier pf_print_state(*state); 4699126258Smlaier pf_print_flags(th->th_flags); 4700126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d\n", 4701126258Smlaier seq, ack, pd->p_len, ackskew, 4702126258Smlaier (*state)->packets[0], (*state)->packets[1]); 4703126258Smlaier } 4704126258Smlaier 4705145836Smlaier if (dst->scrub || src->scrub) { 4706145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4707145836Smlaier *state, src, dst, ©back)) 4708145836Smlaier return (PF_DROP); 4709145836Smlaier } 4710145836Smlaier 4711126258Smlaier /* update max window */ 4712126258Smlaier if (src->max_win < win) 4713126258Smlaier src->max_win = win; 4714126258Smlaier /* synchronize sequencing */ 4715126258Smlaier if (SEQ_GT(end, src->seqlo)) 4716126258Smlaier src->seqlo = end; 4717126258Smlaier /* slide the window of what the other end can send */ 4718126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4719126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4720126258Smlaier 4721126258Smlaier /* 4722126258Smlaier * Cannot set dst->seqhi here since this could be a shotgunned 4723126258Smlaier * SYN and not an already established connection. 4724126258Smlaier */ 4725126258Smlaier 4726126258Smlaier if (th->th_flags & TH_FIN) 4727126258Smlaier if (src->state < TCPS_CLOSING) 4728126258Smlaier src->state = TCPS_CLOSING; 4729126258Smlaier if (th->th_flags & TH_RST) 4730126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4731126258Smlaier 4732126258Smlaier /* Fall through to PASS packet */ 4733126258Smlaier 4734126258Smlaier } else { 4735126258Smlaier if ((*state)->dst.state == TCPS_SYN_SENT && 4736126258Smlaier (*state)->src.state == TCPS_SYN_SENT) { 4737126258Smlaier /* Send RST for state mismatches during handshake */ 4738145836Smlaier if (!(th->th_flags & TH_RST)) 4739162238Scsjp#ifdef __FreeBSD__ 4740162238Scsjp pf_send_tcp(m, (*state)->rule.ptr, pd->af, 4741162238Scsjp#else 4742126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, 4743162238Scsjp#endif 4744126258Smlaier pd->dst, pd->src, th->th_dport, 4745145836Smlaier th->th_sport, ntohl(th->th_ack), 0, 4746145836Smlaier TH_RST, 0, 0, 4747145836Smlaier (*state)->rule.ptr->return_ttl, 1, 4748145836Smlaier pd->eh, kif->pfik_ifp); 4749126258Smlaier src->seqlo = 0; 4750126258Smlaier src->seqhi = 1; 4751126258Smlaier src->max_win = 1; 4752126258Smlaier } else if (pf_status.debug >= PF_DEBUG_MISC) { 4753126258Smlaier printf("pf: BAD state: "); 4754126258Smlaier pf_print_state(*state); 4755126258Smlaier pf_print_flags(th->th_flags); 4756126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d " 4757126258Smlaier "dir=%s,%s\n", seq, ack, pd->p_len, ackskew, 4758126258Smlaier (*state)->packets[0], (*state)->packets[1], 4759126258Smlaier direction == PF_IN ? "in" : "out", 4760126258Smlaier direction == (*state)->direction ? "fwd" : "rev"); 4761126258Smlaier printf("pf: State failure on: %c %c %c %c | %c %c\n", 4762126258Smlaier SEQ_GEQ(src->seqhi, end) ? ' ' : '1', 4763126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) ? 4764126258Smlaier ' ': '2', 4765126258Smlaier (ackskew >= -MAXACKWINDOW) ? ' ' : '3', 4766126258Smlaier (ackskew <= (MAXACKWINDOW << sws)) ? ' ' : '4', 4767126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) ?' ' :'5', 4768126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW) ?' ' :'6'); 4769126258Smlaier } 4770145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 4771126258Smlaier return (PF_DROP); 4772126258Smlaier } 4773126258Smlaier 4774126258Smlaier /* Any packets which have gotten here are to be passed */ 4775126258Smlaier 4776126258Smlaier /* translate source/destination address, if necessary */ 4777126258Smlaier if (STATE_TRANSLATE(*state)) { 4778126258Smlaier if (direction == PF_OUT) 4779126258Smlaier pf_change_ap(pd->src, &th->th_sport, pd->ip_sum, 4780126258Smlaier &th->th_sum, &(*state)->gwy.addr, 4781126258Smlaier (*state)->gwy.port, 0, pd->af); 4782126258Smlaier else 4783126258Smlaier pf_change_ap(pd->dst, &th->th_dport, pd->ip_sum, 4784126258Smlaier &th->th_sum, &(*state)->lan.addr, 4785126258Smlaier (*state)->lan.port, 0, pd->af); 4786126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4787126258Smlaier } else if (copyback) { 4788126258Smlaier /* Copyback sequence modulation or stateful scrub changes */ 4789126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4790126258Smlaier } 4791126258Smlaier 4792126258Smlaier return (PF_PASS); 4793126258Smlaier} 4794126258Smlaier 4795126258Smlaierint 4796130613Smlaierpf_test_state_udp(struct pf_state **state, int direction, struct pfi_kif *kif, 4797130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd) 4798126258Smlaier{ 4799126258Smlaier struct pf_state_peer *src, *dst; 4800130613Smlaier struct pf_state key; 4801126258Smlaier struct udphdr *uh = pd->hdr.udp; 4802126258Smlaier 4803126258Smlaier key.af = pd->af; 4804126258Smlaier key.proto = IPPROTO_UDP; 4805130613Smlaier if (direction == PF_IN) { 4806130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4807130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4808130613Smlaier key.ext.port = uh->uh_sport; 4809130613Smlaier key.gwy.port = uh->uh_dport; 4810130613Smlaier } else { 4811130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4812130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4813130613Smlaier key.lan.port = uh->uh_sport; 4814130613Smlaier key.ext.port = uh->uh_dport; 4815130613Smlaier } 4816126258Smlaier 4817126258Smlaier STATE_LOOKUP(); 4818126258Smlaier 4819126258Smlaier if (direction == (*state)->direction) { 4820126258Smlaier src = &(*state)->src; 4821126258Smlaier dst = &(*state)->dst; 4822126258Smlaier } else { 4823126258Smlaier src = &(*state)->dst; 4824126258Smlaier dst = &(*state)->src; 4825126258Smlaier } 4826126258Smlaier 4827126258Smlaier /* update states */ 4828126258Smlaier if (src->state < PFUDPS_SINGLE) 4829126258Smlaier src->state = PFUDPS_SINGLE; 4830126258Smlaier if (dst->state == PFUDPS_SINGLE) 4831126258Smlaier dst->state = PFUDPS_MULTIPLE; 4832126258Smlaier 4833126258Smlaier /* update expire time */ 4834126261Smlaier (*state)->expire = time_second; 4835126258Smlaier if (src->state == PFUDPS_MULTIPLE && dst->state == PFUDPS_MULTIPLE) 4836126258Smlaier (*state)->timeout = PFTM_UDP_MULTIPLE; 4837126258Smlaier else 4838126258Smlaier (*state)->timeout = PFTM_UDP_SINGLE; 4839126258Smlaier 4840126258Smlaier /* translate source/destination address, if necessary */ 4841126258Smlaier if (STATE_TRANSLATE(*state)) { 4842126258Smlaier if (direction == PF_OUT) 4843126258Smlaier pf_change_ap(pd->src, &uh->uh_sport, pd->ip_sum, 4844126258Smlaier &uh->uh_sum, &(*state)->gwy.addr, 4845126258Smlaier (*state)->gwy.port, 1, pd->af); 4846126258Smlaier else 4847126258Smlaier pf_change_ap(pd->dst, &uh->uh_dport, pd->ip_sum, 4848126258Smlaier &uh->uh_sum, &(*state)->lan.addr, 4849126258Smlaier (*state)->lan.port, 1, pd->af); 4850126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 4851126258Smlaier } 4852126258Smlaier 4853126258Smlaier return (PF_PASS); 4854126258Smlaier} 4855126258Smlaier 4856126258Smlaierint 4857130613Smlaierpf_test_state_icmp(struct pf_state **state, int direction, struct pfi_kif *kif, 4858145836Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, u_short *reason) 4859126258Smlaier{ 4860126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4861127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 4862127629Smlaier u_int16_t *icmpsum = NULL; /* make the compiler happy */ 4863127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 4864130613Smlaier int state_icmp = 0; 4865126258Smlaier 4866126258Smlaier switch (pd->proto) { 4867126258Smlaier#ifdef INET 4868126258Smlaier case IPPROTO_ICMP: 4869126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 4870126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 4871126258Smlaier icmpsum = &pd->hdr.icmp->icmp_cksum; 4872126258Smlaier 4873126258Smlaier if (icmptype == ICMP_UNREACH || 4874126258Smlaier icmptype == ICMP_SOURCEQUENCH || 4875126258Smlaier icmptype == ICMP_REDIRECT || 4876126258Smlaier icmptype == ICMP_TIMXCEED || 4877126258Smlaier icmptype == ICMP_PARAMPROB) 4878126258Smlaier state_icmp++; 4879126258Smlaier break; 4880126258Smlaier#endif /* INET */ 4881126258Smlaier#ifdef INET6 4882126258Smlaier case IPPROTO_ICMPV6: 4883126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 4884126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 4885126258Smlaier icmpsum = &pd->hdr.icmp6->icmp6_cksum; 4886126258Smlaier 4887126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 4888126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 4889126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 4890126258Smlaier icmptype == ICMP6_PARAM_PROB) 4891126258Smlaier state_icmp++; 4892126258Smlaier break; 4893126258Smlaier#endif /* INET6 */ 4894126258Smlaier } 4895126258Smlaier 4896126258Smlaier if (!state_icmp) { 4897126258Smlaier 4898126258Smlaier /* 4899126258Smlaier * ICMP query/reply message not related to a TCP/UDP packet. 4900126258Smlaier * Search for an ICMP state. 4901126258Smlaier */ 4902130613Smlaier struct pf_state key; 4903126258Smlaier 4904126258Smlaier key.af = pd->af; 4905126258Smlaier key.proto = pd->proto; 4906130613Smlaier if (direction == PF_IN) { 4907130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4908130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4909149884Smlaier key.ext.port = 0; 4910130613Smlaier key.gwy.port = icmpid; 4911130613Smlaier } else { 4912130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4913130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4914130613Smlaier key.lan.port = icmpid; 4915149884Smlaier key.ext.port = 0; 4916130613Smlaier } 4917126258Smlaier 4918126258Smlaier STATE_LOOKUP(); 4919126258Smlaier 4920126261Smlaier (*state)->expire = time_second; 4921126258Smlaier (*state)->timeout = PFTM_ICMP_ERROR_REPLY; 4922126258Smlaier 4923126258Smlaier /* translate source/destination address, if necessary */ 4924149884Smlaier if (STATE_TRANSLATE(*state)) { 4925126258Smlaier if (direction == PF_OUT) { 4926126258Smlaier switch (pd->af) { 4927126258Smlaier#ifdef INET 4928126258Smlaier case AF_INET: 4929126258Smlaier pf_change_a(&saddr->v4.s_addr, 4930126258Smlaier pd->ip_sum, 4931126258Smlaier (*state)->gwy.addr.v4.s_addr, 0); 4932149884Smlaier pd->hdr.icmp->icmp_cksum = 4933149884Smlaier pf_cksum_fixup( 4934149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, 4935149884Smlaier (*state)->gwy.port, 0); 4936149884Smlaier pd->hdr.icmp->icmp_id = 4937149884Smlaier (*state)->gwy.port; 4938149884Smlaier m_copyback(m, off, ICMP_MINLEN, 4939149893Smlaier (caddr_t)pd->hdr.icmp); 4940126258Smlaier break; 4941126258Smlaier#endif /* INET */ 4942126258Smlaier#ifdef INET6 4943126258Smlaier case AF_INET6: 4944126258Smlaier pf_change_a6(saddr, 4945126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4946126258Smlaier &(*state)->gwy.addr, 0); 4947126258Smlaier m_copyback(m, off, 4948126258Smlaier sizeof(struct icmp6_hdr), 4949126261Smlaier (caddr_t)pd->hdr.icmp6); 4950126258Smlaier break; 4951126258Smlaier#endif /* INET6 */ 4952126258Smlaier } 4953126258Smlaier } else { 4954126258Smlaier switch (pd->af) { 4955126258Smlaier#ifdef INET 4956126258Smlaier case AF_INET: 4957126258Smlaier pf_change_a(&daddr->v4.s_addr, 4958126258Smlaier pd->ip_sum, 4959126258Smlaier (*state)->lan.addr.v4.s_addr, 0); 4960149884Smlaier pd->hdr.icmp->icmp_cksum = 4961149884Smlaier pf_cksum_fixup( 4962149884Smlaier pd->hdr.icmp->icmp_cksum, icmpid, 4963149884Smlaier (*state)->lan.port, 0); 4964149884Smlaier pd->hdr.icmp->icmp_id = 4965149884Smlaier (*state)->lan.port; 4966149884Smlaier m_copyback(m, off, ICMP_MINLEN, 4967149893Smlaier (caddr_t)pd->hdr.icmp); 4968126258Smlaier break; 4969126258Smlaier#endif /* INET */ 4970126258Smlaier#ifdef INET6 4971126258Smlaier case AF_INET6: 4972126258Smlaier pf_change_a6(daddr, 4973126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4974126258Smlaier &(*state)->lan.addr, 0); 4975126258Smlaier m_copyback(m, off, 4976126258Smlaier sizeof(struct icmp6_hdr), 4977126261Smlaier (caddr_t)pd->hdr.icmp6); 4978126258Smlaier break; 4979126258Smlaier#endif /* INET6 */ 4980126258Smlaier } 4981126258Smlaier } 4982126258Smlaier } 4983126258Smlaier 4984126258Smlaier return (PF_PASS); 4985126258Smlaier 4986126258Smlaier } else { 4987126258Smlaier /* 4988126258Smlaier * ICMP error message in response to a TCP/UDP packet. 4989126258Smlaier * Extract the inner TCP/UDP header and search for that state. 4990126258Smlaier */ 4991126258Smlaier 4992126258Smlaier struct pf_pdesc pd2; 4993126258Smlaier#ifdef INET 4994126258Smlaier struct ip h2; 4995126258Smlaier#endif /* INET */ 4996126258Smlaier#ifdef INET6 4997126258Smlaier struct ip6_hdr h2_6; 4998126258Smlaier int terminal = 0; 4999126258Smlaier#endif /* INET6 */ 5000127629Smlaier int ipoff2 = 0; /* make the compiler happy */ 5001127629Smlaier int off2 = 0; /* make the compiler happy */ 5002126258Smlaier 5003126258Smlaier pd2.af = pd->af; 5004126258Smlaier switch (pd->af) { 5005126258Smlaier#ifdef INET 5006126258Smlaier case AF_INET: 5007126258Smlaier /* offset of h2 in mbuf chain */ 5008126258Smlaier ipoff2 = off + ICMP_MINLEN; 5009126258Smlaier 5010126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2, sizeof(h2), 5011145836Smlaier NULL, reason, pd2.af)) { 5012126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5013126258Smlaier ("pf: ICMP error message too short " 5014126258Smlaier "(ip)\n")); 5015126258Smlaier return (PF_DROP); 5016126258Smlaier } 5017126258Smlaier /* 5018126258Smlaier * ICMP error messages don't refer to non-first 5019126258Smlaier * fragments 5020126258Smlaier */ 5021145836Smlaier if (h2.ip_off & htons(IP_OFFMASK)) { 5022145836Smlaier REASON_SET(reason, PFRES_FRAG); 5023126258Smlaier return (PF_DROP); 5024145836Smlaier } 5025126258Smlaier 5026126258Smlaier /* offset of protocol header that follows h2 */ 5027126258Smlaier off2 = ipoff2 + (h2.ip_hl << 2); 5028126258Smlaier 5029126258Smlaier pd2.proto = h2.ip_p; 5030126258Smlaier pd2.src = (struct pf_addr *)&h2.ip_src; 5031126258Smlaier pd2.dst = (struct pf_addr *)&h2.ip_dst; 5032126258Smlaier pd2.ip_sum = &h2.ip_sum; 5033126258Smlaier break; 5034126258Smlaier#endif /* INET */ 5035126258Smlaier#ifdef INET6 5036126258Smlaier case AF_INET6: 5037126258Smlaier ipoff2 = off + sizeof(struct icmp6_hdr); 5038126258Smlaier 5039126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2_6, sizeof(h2_6), 5040145836Smlaier NULL, reason, pd2.af)) { 5041126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5042126258Smlaier ("pf: ICMP error message too short " 5043126258Smlaier "(ip6)\n")); 5044126258Smlaier return (PF_DROP); 5045126258Smlaier } 5046126258Smlaier pd2.proto = h2_6.ip6_nxt; 5047126258Smlaier pd2.src = (struct pf_addr *)&h2_6.ip6_src; 5048126258Smlaier pd2.dst = (struct pf_addr *)&h2_6.ip6_dst; 5049126258Smlaier pd2.ip_sum = NULL; 5050126258Smlaier off2 = ipoff2 + sizeof(h2_6); 5051126258Smlaier do { 5052126258Smlaier switch (pd2.proto) { 5053126258Smlaier case IPPROTO_FRAGMENT: 5054126258Smlaier /* 5055126258Smlaier * ICMPv6 error messages for 5056126258Smlaier * non-first fragments 5057126258Smlaier */ 5058145836Smlaier REASON_SET(reason, PFRES_FRAG); 5059126258Smlaier return (PF_DROP); 5060126258Smlaier case IPPROTO_AH: 5061126258Smlaier case IPPROTO_HOPOPTS: 5062126258Smlaier case IPPROTO_ROUTING: 5063126258Smlaier case IPPROTO_DSTOPTS: { 5064126258Smlaier /* get next header and header length */ 5065126258Smlaier struct ip6_ext opt6; 5066126258Smlaier 5067126258Smlaier if (!pf_pull_hdr(m, off2, &opt6, 5068145836Smlaier sizeof(opt6), NULL, reason, 5069145836Smlaier pd2.af)) { 5070126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5071126258Smlaier ("pf: ICMPv6 short opt\n")); 5072126258Smlaier return (PF_DROP); 5073126258Smlaier } 5074126258Smlaier if (pd2.proto == IPPROTO_AH) 5075126258Smlaier off2 += (opt6.ip6e_len + 2) * 4; 5076126258Smlaier else 5077126258Smlaier off2 += (opt6.ip6e_len + 1) * 8; 5078126258Smlaier pd2.proto = opt6.ip6e_nxt; 5079126258Smlaier /* goto the next header */ 5080126258Smlaier break; 5081126258Smlaier } 5082126258Smlaier default: 5083126258Smlaier terminal++; 5084126258Smlaier break; 5085126258Smlaier } 5086126258Smlaier } while (!terminal); 5087126258Smlaier break; 5088126258Smlaier#endif /* INET6 */ 5089126258Smlaier } 5090126258Smlaier 5091126258Smlaier switch (pd2.proto) { 5092126258Smlaier case IPPROTO_TCP: { 5093126258Smlaier struct tcphdr th; 5094126258Smlaier u_int32_t seq; 5095130613Smlaier struct pf_state key; 5096126258Smlaier struct pf_state_peer *src, *dst; 5097126258Smlaier u_int8_t dws; 5098128129Smlaier int copyback = 0; 5099126258Smlaier 5100126258Smlaier /* 5101126258Smlaier * Only the first 8 bytes of the TCP header can be 5102126258Smlaier * expected. Don't access any TCP header fields after 5103126258Smlaier * th_seq, an ackskew test is not possible. 5104126258Smlaier */ 5105145836Smlaier if (!pf_pull_hdr(m, off2, &th, 8, NULL, reason, 5106145836Smlaier pd2.af)) { 5107126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5108126258Smlaier ("pf: ICMP error message too short " 5109126258Smlaier "(tcp)\n")); 5110126258Smlaier return (PF_DROP); 5111126258Smlaier } 5112126258Smlaier 5113126258Smlaier key.af = pd2.af; 5114126258Smlaier key.proto = IPPROTO_TCP; 5115130613Smlaier if (direction == PF_IN) { 5116130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5117130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5118130613Smlaier key.ext.port = th.th_dport; 5119130613Smlaier key.gwy.port = th.th_sport; 5120130613Smlaier } else { 5121130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5122130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5123130613Smlaier key.lan.port = th.th_dport; 5124130613Smlaier key.ext.port = th.th_sport; 5125130613Smlaier } 5126126258Smlaier 5127126258Smlaier STATE_LOOKUP(); 5128126258Smlaier 5129126258Smlaier if (direction == (*state)->direction) { 5130126258Smlaier src = &(*state)->dst; 5131126258Smlaier dst = &(*state)->src; 5132126258Smlaier } else { 5133126258Smlaier src = &(*state)->src; 5134126258Smlaier dst = &(*state)->dst; 5135126258Smlaier } 5136126258Smlaier 5137130613Smlaier if (src->wscale && dst->wscale && 5138130613Smlaier !(th.th_flags & TH_SYN)) 5139126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 5140126258Smlaier else 5141126258Smlaier dws = 0; 5142126258Smlaier 5143126258Smlaier /* Demodulate sequence number */ 5144126258Smlaier seq = ntohl(th.th_seq) - src->seqdiff; 5145128129Smlaier if (src->seqdiff) { 5146128129Smlaier pf_change_a(&th.th_seq, icmpsum, 5147126258Smlaier htonl(seq), 0); 5148128129Smlaier copyback = 1; 5149128129Smlaier } 5150126258Smlaier 5151126258Smlaier if (!SEQ_GEQ(src->seqhi, seq) || 5152126258Smlaier !SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws))) { 5153126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 5154126258Smlaier printf("pf: BAD ICMP %d:%d ", 5155126258Smlaier icmptype, pd->hdr.icmp->icmp_code); 5156126258Smlaier pf_print_host(pd->src, 0, pd->af); 5157126258Smlaier printf(" -> "); 5158126258Smlaier pf_print_host(pd->dst, 0, pd->af); 5159126258Smlaier printf(" state: "); 5160126258Smlaier pf_print_state(*state); 5161126258Smlaier printf(" seq=%u\n", seq); 5162126258Smlaier } 5163145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 5164126258Smlaier return (PF_DROP); 5165126258Smlaier } 5166126258Smlaier 5167126258Smlaier if (STATE_TRANSLATE(*state)) { 5168126258Smlaier if (direction == PF_IN) { 5169126258Smlaier pf_change_icmp(pd2.src, &th.th_sport, 5170128129Smlaier daddr, &(*state)->lan.addr, 5171126258Smlaier (*state)->lan.port, NULL, 5172126258Smlaier pd2.ip_sum, icmpsum, 5173126258Smlaier pd->ip_sum, 0, pd2.af); 5174126258Smlaier } else { 5175126258Smlaier pf_change_icmp(pd2.dst, &th.th_dport, 5176126258Smlaier saddr, &(*state)->gwy.addr, 5177126258Smlaier (*state)->gwy.port, NULL, 5178126258Smlaier pd2.ip_sum, icmpsum, 5179126258Smlaier pd->ip_sum, 0, pd2.af); 5180126258Smlaier } 5181128129Smlaier copyback = 1; 5182128129Smlaier } 5183128129Smlaier 5184128129Smlaier if (copyback) { 5185126258Smlaier switch (pd2.af) { 5186126258Smlaier#ifdef INET 5187126258Smlaier case AF_INET: 5188126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5189126261Smlaier (caddr_t)pd->hdr.icmp); 5190126258Smlaier m_copyback(m, ipoff2, sizeof(h2), 5191126261Smlaier (caddr_t)&h2); 5192126258Smlaier break; 5193126258Smlaier#endif /* INET */ 5194126258Smlaier#ifdef INET6 5195126258Smlaier case AF_INET6: 5196126258Smlaier m_copyback(m, off, 5197126258Smlaier sizeof(struct icmp6_hdr), 5198126261Smlaier (caddr_t)pd->hdr.icmp6); 5199126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5200126261Smlaier (caddr_t)&h2_6); 5201126258Smlaier break; 5202126258Smlaier#endif /* INET6 */ 5203126258Smlaier } 5204126261Smlaier m_copyback(m, off2, 8, (caddr_t)&th); 5205126258Smlaier } 5206126258Smlaier 5207126258Smlaier return (PF_PASS); 5208126258Smlaier break; 5209126258Smlaier } 5210126258Smlaier case IPPROTO_UDP: { 5211126258Smlaier struct udphdr uh; 5212130613Smlaier struct pf_state key; 5213126258Smlaier 5214126258Smlaier if (!pf_pull_hdr(m, off2, &uh, sizeof(uh), 5215145836Smlaier NULL, reason, pd2.af)) { 5216126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5217126258Smlaier ("pf: ICMP error message too short " 5218126258Smlaier "(udp)\n")); 5219126258Smlaier return (PF_DROP); 5220126258Smlaier } 5221126258Smlaier 5222126258Smlaier key.af = pd2.af; 5223126258Smlaier key.proto = IPPROTO_UDP; 5224130613Smlaier if (direction == PF_IN) { 5225130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5226130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5227130613Smlaier key.ext.port = uh.uh_dport; 5228130613Smlaier key.gwy.port = uh.uh_sport; 5229130613Smlaier } else { 5230130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5231130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5232130613Smlaier key.lan.port = uh.uh_dport; 5233130613Smlaier key.ext.port = uh.uh_sport; 5234130613Smlaier } 5235126258Smlaier 5236126258Smlaier STATE_LOOKUP(); 5237126258Smlaier 5238126258Smlaier if (STATE_TRANSLATE(*state)) { 5239126258Smlaier if (direction == PF_IN) { 5240126258Smlaier pf_change_icmp(pd2.src, &uh.uh_sport, 5241126258Smlaier daddr, &(*state)->lan.addr, 5242126258Smlaier (*state)->lan.port, &uh.uh_sum, 5243126258Smlaier pd2.ip_sum, icmpsum, 5244126258Smlaier pd->ip_sum, 1, pd2.af); 5245126258Smlaier } else { 5246126258Smlaier pf_change_icmp(pd2.dst, &uh.uh_dport, 5247126258Smlaier saddr, &(*state)->gwy.addr, 5248126258Smlaier (*state)->gwy.port, &uh.uh_sum, 5249126258Smlaier pd2.ip_sum, icmpsum, 5250126258Smlaier pd->ip_sum, 1, pd2.af); 5251126258Smlaier } 5252126258Smlaier switch (pd2.af) { 5253126258Smlaier#ifdef INET 5254126258Smlaier case AF_INET: 5255126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5256126261Smlaier (caddr_t)pd->hdr.icmp); 5257126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5258126261Smlaier (caddr_t)&h2); 5259126258Smlaier break; 5260126258Smlaier#endif /* INET */ 5261126258Smlaier#ifdef INET6 5262126258Smlaier case AF_INET6: 5263126258Smlaier m_copyback(m, off, 5264126258Smlaier sizeof(struct icmp6_hdr), 5265126261Smlaier (caddr_t)pd->hdr.icmp6); 5266126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5267126261Smlaier (caddr_t)&h2_6); 5268126258Smlaier break; 5269126258Smlaier#endif /* INET6 */ 5270126258Smlaier } 5271126261Smlaier m_copyback(m, off2, sizeof(uh), 5272126261Smlaier (caddr_t)&uh); 5273126258Smlaier } 5274126258Smlaier 5275126258Smlaier return (PF_PASS); 5276126258Smlaier break; 5277126258Smlaier } 5278126258Smlaier#ifdef INET 5279126258Smlaier case IPPROTO_ICMP: { 5280126258Smlaier struct icmp iih; 5281130613Smlaier struct pf_state key; 5282126258Smlaier 5283126258Smlaier if (!pf_pull_hdr(m, off2, &iih, ICMP_MINLEN, 5284145836Smlaier NULL, reason, pd2.af)) { 5285126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5286126258Smlaier ("pf: ICMP error message too short i" 5287126258Smlaier "(icmp)\n")); 5288126258Smlaier return (PF_DROP); 5289126258Smlaier } 5290126258Smlaier 5291126258Smlaier key.af = pd2.af; 5292126258Smlaier key.proto = IPPROTO_ICMP; 5293130613Smlaier if (direction == PF_IN) { 5294130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5295130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5296149884Smlaier key.ext.port = 0; 5297130613Smlaier key.gwy.port = iih.icmp_id; 5298130613Smlaier } else { 5299130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5300130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5301130613Smlaier key.lan.port = iih.icmp_id; 5302149884Smlaier key.ext.port = 0; 5303130613Smlaier } 5304126258Smlaier 5305126258Smlaier STATE_LOOKUP(); 5306126258Smlaier 5307126258Smlaier if (STATE_TRANSLATE(*state)) { 5308126258Smlaier if (direction == PF_IN) { 5309126258Smlaier pf_change_icmp(pd2.src, &iih.icmp_id, 5310126258Smlaier daddr, &(*state)->lan.addr, 5311126258Smlaier (*state)->lan.port, NULL, 5312126258Smlaier pd2.ip_sum, icmpsum, 5313126258Smlaier pd->ip_sum, 0, AF_INET); 5314126258Smlaier } else { 5315126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp_id, 5316126258Smlaier saddr, &(*state)->gwy.addr, 5317126258Smlaier (*state)->gwy.port, NULL, 5318126258Smlaier pd2.ip_sum, icmpsum, 5319126258Smlaier pd->ip_sum, 0, AF_INET); 5320126258Smlaier } 5321126261Smlaier m_copyback(m, off, ICMP_MINLEN, 5322126261Smlaier (caddr_t)pd->hdr.icmp); 5323126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5324126261Smlaier (caddr_t)&h2); 5325126261Smlaier m_copyback(m, off2, ICMP_MINLEN, 5326126261Smlaier (caddr_t)&iih); 5327126258Smlaier } 5328126258Smlaier 5329126258Smlaier return (PF_PASS); 5330126258Smlaier break; 5331126258Smlaier } 5332126258Smlaier#endif /* INET */ 5333126258Smlaier#ifdef INET6 5334126258Smlaier case IPPROTO_ICMPV6: { 5335126258Smlaier struct icmp6_hdr iih; 5336130613Smlaier struct pf_state key; 5337126258Smlaier 5338126258Smlaier if (!pf_pull_hdr(m, off2, &iih, 5339145836Smlaier sizeof(struct icmp6_hdr), NULL, reason, pd2.af)) { 5340126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5341126258Smlaier ("pf: ICMP error message too short " 5342126258Smlaier "(icmp6)\n")); 5343126258Smlaier return (PF_DROP); 5344126258Smlaier } 5345126258Smlaier 5346126258Smlaier key.af = pd2.af; 5347126258Smlaier key.proto = IPPROTO_ICMPV6; 5348130613Smlaier if (direction == PF_IN) { 5349130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5350130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5351149884Smlaier key.ext.port = 0; 5352130613Smlaier key.gwy.port = iih.icmp6_id; 5353130613Smlaier } else { 5354130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5355130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5356130613Smlaier key.lan.port = iih.icmp6_id; 5357149884Smlaier key.ext.port = 0; 5358130613Smlaier } 5359126258Smlaier 5360126258Smlaier STATE_LOOKUP(); 5361126258Smlaier 5362126258Smlaier if (STATE_TRANSLATE(*state)) { 5363126258Smlaier if (direction == PF_IN) { 5364126258Smlaier pf_change_icmp(pd2.src, &iih.icmp6_id, 5365126258Smlaier daddr, &(*state)->lan.addr, 5366126258Smlaier (*state)->lan.port, NULL, 5367126258Smlaier pd2.ip_sum, icmpsum, 5368126258Smlaier pd->ip_sum, 0, AF_INET6); 5369126258Smlaier } else { 5370126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp6_id, 5371126258Smlaier saddr, &(*state)->gwy.addr, 5372126258Smlaier (*state)->gwy.port, NULL, 5373126258Smlaier pd2.ip_sum, icmpsum, 5374126258Smlaier pd->ip_sum, 0, AF_INET6); 5375126258Smlaier } 5376126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 5377126261Smlaier (caddr_t)pd->hdr.icmp6); 5378126261Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5379126261Smlaier (caddr_t)&h2_6); 5380126258Smlaier m_copyback(m, off2, sizeof(struct icmp6_hdr), 5381126261Smlaier (caddr_t)&iih); 5382126258Smlaier } 5383126258Smlaier 5384126258Smlaier return (PF_PASS); 5385126258Smlaier break; 5386126258Smlaier } 5387126258Smlaier#endif /* INET6 */ 5388126258Smlaier default: { 5389130613Smlaier struct pf_state key; 5390126258Smlaier 5391126258Smlaier key.af = pd2.af; 5392126258Smlaier key.proto = pd2.proto; 5393130613Smlaier if (direction == PF_IN) { 5394130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5395130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5396130613Smlaier key.ext.port = 0; 5397130613Smlaier key.gwy.port = 0; 5398130613Smlaier } else { 5399130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5400130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5401130613Smlaier key.lan.port = 0; 5402130613Smlaier key.ext.port = 0; 5403130613Smlaier } 5404126258Smlaier 5405126258Smlaier STATE_LOOKUP(); 5406126258Smlaier 5407126258Smlaier if (STATE_TRANSLATE(*state)) { 5408126258Smlaier if (direction == PF_IN) { 5409126258Smlaier pf_change_icmp(pd2.src, NULL, 5410126258Smlaier daddr, &(*state)->lan.addr, 5411126258Smlaier 0, NULL, 5412126258Smlaier pd2.ip_sum, icmpsum, 5413126258Smlaier pd->ip_sum, 0, pd2.af); 5414126258Smlaier } else { 5415126258Smlaier pf_change_icmp(pd2.dst, NULL, 5416126258Smlaier saddr, &(*state)->gwy.addr, 5417126258Smlaier 0, NULL, 5418126258Smlaier pd2.ip_sum, icmpsum, 5419126258Smlaier pd->ip_sum, 0, pd2.af); 5420126258Smlaier } 5421126258Smlaier switch (pd2.af) { 5422126258Smlaier#ifdef INET 5423126258Smlaier case AF_INET: 5424126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5425126261Smlaier (caddr_t)pd->hdr.icmp); 5426126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5427126261Smlaier (caddr_t)&h2); 5428126258Smlaier break; 5429126258Smlaier#endif /* INET */ 5430126258Smlaier#ifdef INET6 5431126258Smlaier case AF_INET6: 5432126258Smlaier m_copyback(m, off, 5433126258Smlaier sizeof(struct icmp6_hdr), 5434126261Smlaier (caddr_t)pd->hdr.icmp6); 5435126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5436126261Smlaier (caddr_t)&h2_6); 5437126258Smlaier break; 5438126258Smlaier#endif /* INET6 */ 5439126258Smlaier } 5440126258Smlaier } 5441126258Smlaier 5442126258Smlaier return (PF_PASS); 5443126258Smlaier break; 5444126258Smlaier } 5445126258Smlaier } 5446126258Smlaier } 5447126258Smlaier} 5448126258Smlaier 5449126258Smlaierint 5450130613Smlaierpf_test_state_other(struct pf_state **state, int direction, struct pfi_kif *kif, 5451126258Smlaier struct pf_pdesc *pd) 5452126258Smlaier{ 5453126258Smlaier struct pf_state_peer *src, *dst; 5454130613Smlaier struct pf_state key; 5455126258Smlaier 5456126258Smlaier key.af = pd->af; 5457126258Smlaier key.proto = pd->proto; 5458130613Smlaier if (direction == PF_IN) { 5459130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 5460130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 5461130613Smlaier key.ext.port = 0; 5462130613Smlaier key.gwy.port = 0; 5463130613Smlaier } else { 5464130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 5465130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 5466130613Smlaier key.lan.port = 0; 5467130613Smlaier key.ext.port = 0; 5468130613Smlaier } 5469126258Smlaier 5470126258Smlaier STATE_LOOKUP(); 5471126258Smlaier 5472126258Smlaier if (direction == (*state)->direction) { 5473126258Smlaier src = &(*state)->src; 5474126258Smlaier dst = &(*state)->dst; 5475126258Smlaier } else { 5476126258Smlaier src = &(*state)->dst; 5477126258Smlaier dst = &(*state)->src; 5478126258Smlaier } 5479126258Smlaier 5480126258Smlaier /* update states */ 5481126258Smlaier if (src->state < PFOTHERS_SINGLE) 5482126258Smlaier src->state = PFOTHERS_SINGLE; 5483126258Smlaier if (dst->state == PFOTHERS_SINGLE) 5484126258Smlaier dst->state = PFOTHERS_MULTIPLE; 5485126258Smlaier 5486126258Smlaier /* update expire time */ 5487126261Smlaier (*state)->expire = time_second; 5488126258Smlaier if (src->state == PFOTHERS_MULTIPLE && dst->state == PFOTHERS_MULTIPLE) 5489126258Smlaier (*state)->timeout = PFTM_OTHER_MULTIPLE; 5490126258Smlaier else 5491126258Smlaier (*state)->timeout = PFTM_OTHER_SINGLE; 5492126258Smlaier 5493126258Smlaier /* translate source/destination address, if necessary */ 5494126258Smlaier if (STATE_TRANSLATE(*state)) { 5495126258Smlaier if (direction == PF_OUT) 5496126258Smlaier switch (pd->af) { 5497126258Smlaier#ifdef INET 5498126258Smlaier case AF_INET: 5499126258Smlaier pf_change_a(&pd->src->v4.s_addr, 5500126258Smlaier pd->ip_sum, (*state)->gwy.addr.v4.s_addr, 5501126258Smlaier 0); 5502126258Smlaier break; 5503126258Smlaier#endif /* INET */ 5504126258Smlaier#ifdef INET6 5505126258Smlaier case AF_INET6: 5506126258Smlaier PF_ACPY(pd->src, &(*state)->gwy.addr, pd->af); 5507126258Smlaier break; 5508126258Smlaier#endif /* INET6 */ 5509126258Smlaier } 5510126258Smlaier else 5511126258Smlaier switch (pd->af) { 5512126258Smlaier#ifdef INET 5513126258Smlaier case AF_INET: 5514126258Smlaier pf_change_a(&pd->dst->v4.s_addr, 5515126258Smlaier pd->ip_sum, (*state)->lan.addr.v4.s_addr, 5516126258Smlaier 0); 5517126258Smlaier break; 5518126258Smlaier#endif /* INET */ 5519126258Smlaier#ifdef INET6 5520126258Smlaier case AF_INET6: 5521126258Smlaier PF_ACPY(pd->dst, &(*state)->lan.addr, pd->af); 5522126258Smlaier break; 5523126258Smlaier#endif /* INET6 */ 5524126258Smlaier } 5525126258Smlaier } 5526126258Smlaier 5527126258Smlaier return (PF_PASS); 5528126258Smlaier} 5529126258Smlaier 5530126258Smlaier/* 5531126258Smlaier * ipoff and off are measured from the start of the mbuf chain. 5532126258Smlaier * h must be at "ipoff" on the mbuf chain. 5533126258Smlaier */ 5534126258Smlaiervoid * 5535126258Smlaierpf_pull_hdr(struct mbuf *m, int off, void *p, int len, 5536126258Smlaier u_short *actionp, u_short *reasonp, sa_family_t af) 5537126258Smlaier{ 5538126258Smlaier switch (af) { 5539126258Smlaier#ifdef INET 5540126258Smlaier case AF_INET: { 5541126258Smlaier struct ip *h = mtod(m, struct ip *); 5542126258Smlaier u_int16_t fragoff = (ntohs(h->ip_off) & IP_OFFMASK) << 3; 5543126258Smlaier 5544126258Smlaier if (fragoff) { 5545126258Smlaier if (fragoff >= len) 5546126258Smlaier ACTION_SET(actionp, PF_PASS); 5547126258Smlaier else { 5548126258Smlaier ACTION_SET(actionp, PF_DROP); 5549126258Smlaier REASON_SET(reasonp, PFRES_FRAG); 5550126258Smlaier } 5551126258Smlaier return (NULL); 5552126258Smlaier } 5553130613Smlaier if (m->m_pkthdr.len < off + len || 5554130613Smlaier ntohs(h->ip_len) < off + len) { 5555126258Smlaier ACTION_SET(actionp, PF_DROP); 5556126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5557126258Smlaier return (NULL); 5558126258Smlaier } 5559126258Smlaier break; 5560126258Smlaier } 5561126258Smlaier#endif /* INET */ 5562126258Smlaier#ifdef INET6 5563126258Smlaier case AF_INET6: { 5564126258Smlaier struct ip6_hdr *h = mtod(m, struct ip6_hdr *); 5565126258Smlaier 5566126258Smlaier if (m->m_pkthdr.len < off + len || 5567126258Smlaier (ntohs(h->ip6_plen) + sizeof(struct ip6_hdr)) < 5568126258Smlaier (unsigned)(off + len)) { 5569126258Smlaier ACTION_SET(actionp, PF_DROP); 5570126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5571126258Smlaier return (NULL); 5572126258Smlaier } 5573126258Smlaier break; 5574126258Smlaier } 5575126258Smlaier#endif /* INET6 */ 5576126258Smlaier } 5577126258Smlaier m_copydata(m, off, len, p); 5578126258Smlaier return (p); 5579126258Smlaier} 5580126258Smlaier 5581126258Smlaierint 5582126258Smlaierpf_routable(struct pf_addr *addr, sa_family_t af) 5583126258Smlaier{ 5584126258Smlaier struct sockaddr_in *dst; 5585145836Smlaier#ifdef INET6 5586145836Smlaier struct sockaddr_in6 *dst6; 5587145836Smlaier struct route_in6 ro; 5588145836Smlaier#else 5589126258Smlaier struct route ro; 5590145836Smlaier#endif 5591126258Smlaier 5592126258Smlaier bzero(&ro, sizeof(ro)); 5593145836Smlaier switch (af) { 5594145836Smlaier case AF_INET: 5595145836Smlaier dst = satosin(&ro.ro_dst); 5596145836Smlaier dst->sin_family = AF_INET; 5597145836Smlaier dst->sin_len = sizeof(*dst); 5598145836Smlaier dst->sin_addr = addr->v4; 5599145836Smlaier break; 5600145836Smlaier#ifdef INET6 5601145836Smlaier case AF_INET6: 5602145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 5603145836Smlaier dst6->sin6_family = AF_INET6; 5604145836Smlaier dst6->sin6_len = sizeof(*dst6); 5605145836Smlaier dst6->sin6_addr = addr->v6; 5606145836Smlaier break; 5607145836Smlaier#endif /* INET6 */ 5608145836Smlaier default: 5609145836Smlaier return (0); 5610145836Smlaier } 5611145836Smlaier 5612127145Smlaier#ifdef __FreeBSD__ 5613126261Smlaier#ifdef RTF_PRCLONING 5614145836Smlaier rtalloc_ign((struct route *)&ro, (RTF_CLONING | RTF_PRCLONING)); 5615126261Smlaier#else /* !RTF_PRCLONING */ 5616145836Smlaier rtalloc_ign((struct route *)&ro, RTF_CLONING); 5617126261Smlaier#endif 5618126261Smlaier#else /* ! __FreeBSD__ */ 5619145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 5620126261Smlaier#endif 5621126258Smlaier 5622126258Smlaier if (ro.ro_rt != NULL) { 5623126258Smlaier RTFREE(ro.ro_rt); 5624145836Smlaier return (1); 5625126258Smlaier } 5626126258Smlaier 5627145836Smlaier return (0); 5628145836Smlaier} 5629145836Smlaier 5630145836Smlaierint 5631145836Smlaierpf_rtlabel_match(struct pf_addr *addr, sa_family_t af, struct pf_addr_wrap *aw) 5632145836Smlaier{ 5633145836Smlaier struct sockaddr_in *dst; 5634145836Smlaier#ifdef INET6 5635145836Smlaier struct sockaddr_in6 *dst6; 5636145836Smlaier struct route_in6 ro; 5637145836Smlaier#else 5638145836Smlaier struct route ro; 5639145836Smlaier#endif 5640145836Smlaier int ret = 0; 5641145836Smlaier 5642145836Smlaier bzero(&ro, sizeof(ro)); 5643145836Smlaier switch (af) { 5644145836Smlaier case AF_INET: 5645145836Smlaier dst = satosin(&ro.ro_dst); 5646145836Smlaier dst->sin_family = AF_INET; 5647145836Smlaier dst->sin_len = sizeof(*dst); 5648145836Smlaier dst->sin_addr = addr->v4; 5649145836Smlaier break; 5650145836Smlaier#ifdef INET6 5651145836Smlaier case AF_INET6: 5652145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 5653145836Smlaier dst6->sin6_family = AF_INET6; 5654145836Smlaier dst6->sin6_len = sizeof(*dst6); 5655145836Smlaier dst6->sin6_addr = addr->v6; 5656145836Smlaier break; 5657145836Smlaier#endif /* INET6 */ 5658145836Smlaier default: 5659145836Smlaier return (0); 5660145836Smlaier } 5661145836Smlaier 5662145836Smlaier#ifdef __FreeBSD__ 5663145836Smlaier# ifdef RTF_PRCLONING 5664145836Smlaier rtalloc_ign((struct route *)&ro, (RTF_CLONING|RTF_PRCLONING)); 5665145836Smlaier# else /* !RTF_PRCLONING */ 5666145836Smlaier rtalloc_ign((struct route *)&ro, RTF_CLONING); 5667145836Smlaier# endif 5668145836Smlaier#else /* ! __FreeBSD__ */ 5669145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 5670145836Smlaier#endif 5671145836Smlaier 5672145836Smlaier if (ro.ro_rt != NULL) { 5673145836Smlaier#ifdef __FreeBSD__ 5674145836Smlaier /* XXX_IMPORT: later */ 5675145836Smlaier#else 5676145836Smlaier if (ro.ro_rt->rt_labelid == aw->v.rtlabel) 5677145836Smlaier ret = 1; 5678145836Smlaier#endif 5679145836Smlaier RTFREE(ro.ro_rt); 5680145836Smlaier } 5681145836Smlaier 5682126258Smlaier return (ret); 5683126258Smlaier} 5684126258Smlaier 5685126258Smlaier#ifdef INET 5686126261Smlaier 5687126258Smlaiervoid 5688126258Smlaierpf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5689126258Smlaier struct pf_state *s) 5690126258Smlaier{ 5691126258Smlaier struct mbuf *m0, *m1; 5692132303Smlaier struct m_tag *mtag; 5693126258Smlaier struct route iproute; 5694127629Smlaier struct route *ro = NULL; /* XXX: was uninitialized */ 5695126258Smlaier struct sockaddr_in *dst; 5696126258Smlaier struct ip *ip; 5697126258Smlaier struct ifnet *ifp = NULL; 5698126258Smlaier struct pf_addr naddr; 5699130613Smlaier struct pf_src_node *sn = NULL; 5700126258Smlaier int error = 0; 5701127145Smlaier#ifdef __FreeBSD__ 5702126261Smlaier int sw_csum; 5703126261Smlaier#endif 5704126258Smlaier 5705126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5706126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5707126258Smlaier panic("pf_route: invalid parameters"); 5708126258Smlaier 5709132303Smlaier if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) { 5710132303Smlaier if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) == 5711132303Smlaier NULL) { 5712132303Smlaier m0 = *m; 5713132303Smlaier *m = NULL; 5714132303Smlaier goto bad; 5715132303Smlaier } 5716132303Smlaier *(char *)(mtag + 1) = 1; 5717132303Smlaier m_tag_prepend(*m, mtag); 5718132303Smlaier } else { 5719132303Smlaier if (*(char *)(mtag + 1) > 3) { 5720132303Smlaier m0 = *m; 5721132303Smlaier *m = NULL; 5722132303Smlaier goto bad; 5723132303Smlaier } 5724132303Smlaier (*(char *)(mtag + 1))++; 5725132303Smlaier } 5726132303Smlaier 5727126258Smlaier if (r->rt == PF_DUPTO) { 5728127145Smlaier#ifdef __FreeBSD__ 5729132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 5730126261Smlaier#else 5731132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 5732126261Smlaier#endif 5733126258Smlaier return; 5734126258Smlaier } else { 5735126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 5736126258Smlaier return; 5737126258Smlaier m0 = *m; 5738126258Smlaier } 5739126258Smlaier 5740145836Smlaier if (m0->m_len < sizeof(struct ip)) { 5741145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5742145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 5743145836Smlaier goto bad; 5744145836Smlaier } 5745145836Smlaier 5746126258Smlaier ip = mtod(m0, struct ip *); 5747126258Smlaier 5748126258Smlaier ro = &iproute; 5749126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 5750126258Smlaier dst = satosin(&ro->ro_dst); 5751126258Smlaier dst->sin_family = AF_INET; 5752126258Smlaier dst->sin_len = sizeof(*dst); 5753126258Smlaier dst->sin_addr = ip->ip_dst; 5754126258Smlaier 5755126258Smlaier if (r->rt == PF_FASTROUTE) { 5756126258Smlaier rtalloc(ro); 5757126258Smlaier if (ro->ro_rt == 0) { 5758126258Smlaier ipstat.ips_noroute++; 5759126258Smlaier goto bad; 5760126258Smlaier } 5761126258Smlaier 5762126258Smlaier ifp = ro->ro_rt->rt_ifp; 5763126258Smlaier ro->ro_rt->rt_use++; 5764126258Smlaier 5765126258Smlaier if (ro->ro_rt->rt_flags & RTF_GATEWAY) 5766126258Smlaier dst = satosin(ro->ro_rt->rt_gateway); 5767126258Smlaier } else { 5768145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 5769145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5770145836Smlaier ("pf_route: TAILQ_EMPTY(&r->rpool.list)\n")); 5771145836Smlaier goto bad; 5772145836Smlaier } 5773126258Smlaier if (s == NULL) { 5774130613Smlaier pf_map_addr(AF_INET, r, (struct pf_addr *)&ip->ip_src, 5775130613Smlaier &naddr, NULL, &sn); 5776126258Smlaier if (!PF_AZERO(&naddr, AF_INET)) 5777126258Smlaier dst->sin_addr.s_addr = naddr.v4.s_addr; 5778130613Smlaier ifp = r->rpool.cur->kif ? 5779130613Smlaier r->rpool.cur->kif->pfik_ifp : NULL; 5780126258Smlaier } else { 5781126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET)) 5782126258Smlaier dst->sin_addr.s_addr = 5783126258Smlaier s->rt_addr.v4.s_addr; 5784130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 5785126258Smlaier } 5786126258Smlaier } 5787126258Smlaier if (ifp == NULL) 5788126258Smlaier goto bad; 5789126258Smlaier 5790130639Smlaier if (oifp != ifp) { 5791127145Smlaier#ifdef __FreeBSD__ 5792126261Smlaier PF_UNLOCK(); 5793145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 5794126261Smlaier PF_LOCK(); 5795126261Smlaier goto bad; 5796126261Smlaier } else if (m0 == NULL) { 5797126261Smlaier PF_LOCK(); 5798126261Smlaier goto done; 5799126261Smlaier } 5800126261Smlaier PF_LOCK(); 5801126261Smlaier#else 5802145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL) != PF_PASS) 5803126258Smlaier goto bad; 5804126258Smlaier else if (m0 == NULL) 5805126258Smlaier goto done; 5806126261Smlaier#endif 5807145836Smlaier if (m0->m_len < sizeof(struct ip)) { 5808145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5809145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 5810145836Smlaier goto bad; 5811145836Smlaier } 5812126258Smlaier ip = mtod(m0, struct ip *); 5813126258Smlaier } 5814126258Smlaier 5815127145Smlaier#ifdef __FreeBSD__ 5816126261Smlaier /* Copied from FreeBSD 5.1-CURRENT ip_output. */ 5817126261Smlaier m0->m_pkthdr.csum_flags |= CSUM_IP; 5818126261Smlaier sw_csum = m0->m_pkthdr.csum_flags & ~ifp->if_hwassist; 5819126261Smlaier if (sw_csum & CSUM_DELAY_DATA) { 5820126261Smlaier /* 5821126261Smlaier * XXX: in_delayed_cksum assumes HBO for ip->ip_len (at least) 5822126261Smlaier */ 5823126261Smlaier NTOHS(ip->ip_len); 5824126261Smlaier NTOHS(ip->ip_off); /* XXX: needed? */ 5825126261Smlaier in_delayed_cksum(m0); 5826126261Smlaier HTONS(ip->ip_len); 5827126261Smlaier HTONS(ip->ip_off); 5828126261Smlaier sw_csum &= ~CSUM_DELAY_DATA; 5829126261Smlaier } 5830126261Smlaier m0->m_pkthdr.csum_flags &= ifp->if_hwassist; 5831126261Smlaier 5832126261Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu || 5833126261Smlaier (ifp->if_hwassist & CSUM_FRAGMENT && 5834126261Smlaier ((ip->ip_off & htons(IP_DF)) == 0))) { 5835126261Smlaier /* 5836126261Smlaier * ip->ip_len = htons(ip->ip_len); 5837126261Smlaier * ip->ip_off = htons(ip->ip_off); 5838126261Smlaier */ 5839126261Smlaier ip->ip_sum = 0; 5840126261Smlaier if (sw_csum & CSUM_DELAY_IP) { 5841126261Smlaier /* From KAME */ 5842126261Smlaier if (ip->ip_v == IPVERSION && 5843126261Smlaier (ip->ip_hl << 2) == sizeof(*ip)) { 5844126261Smlaier ip->ip_sum = in_cksum_hdr(ip); 5845126261Smlaier } else { 5846126261Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5847126261Smlaier } 5848126261Smlaier } 5849126261Smlaier PF_UNLOCK(); 5850126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), ro->ro_rt); 5851126261Smlaier PF_LOCK(); 5852126261Smlaier goto done; 5853126261Smlaier } 5854126261Smlaier 5855126261Smlaier#else 5856126258Smlaier /* Copied from ip_output. */ 5857130613Smlaier#ifdef IPSEC 5858130613Smlaier /* 5859130613Smlaier * If deferred crypto processing is needed, check that the 5860130613Smlaier * interface supports it. 5861130613Smlaier */ 5862130613Smlaier if ((mtag = m_tag_find(m0, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL)) 5863130613Smlaier != NULL && (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 5864130613Smlaier /* Notify IPsec to do its own crypto. */ 5865130613Smlaier ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 5866130613Smlaier goto bad; 5867130613Smlaier } 5868130613Smlaier#endif /* IPSEC */ 5869130613Smlaier 5870130613Smlaier /* Catch routing changes wrt. hardware checksumming for TCP or UDP. */ 5871130613Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) { 5872130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_TCPv4) || 5873130613Smlaier ifp->if_bridge != NULL) { 5874130613Smlaier in_delayed_cksum(m0); 5875130613Smlaier m0->m_pkthdr.csum &= ~M_TCPV4_CSUM_OUT; /* Clear */ 5876130613Smlaier } 5877130613Smlaier } else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) { 5878130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_UDPv4) || 5879130613Smlaier ifp->if_bridge != NULL) { 5880130613Smlaier in_delayed_cksum(m0); 5881130613Smlaier m0->m_pkthdr.csum &= ~M_UDPV4_CSUM_OUT; /* Clear */ 5882130613Smlaier } 5883130613Smlaier } 5884130613Smlaier 5885126258Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu) { 5886126258Smlaier if ((ifp->if_capabilities & IFCAP_CSUM_IPv4) && 5887126258Smlaier ifp->if_bridge == NULL) { 5888126258Smlaier m0->m_pkthdr.csum |= M_IPV4_CSUM_OUT; 5889126258Smlaier ipstat.ips_outhwcsum++; 5890126258Smlaier } else { 5891126258Smlaier ip->ip_sum = 0; 5892126258Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5893126258Smlaier } 5894126258Smlaier /* Update relevant hardware checksum stats for TCP/UDP */ 5895126258Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) 5896126258Smlaier tcpstat.tcps_outhwcsum++; 5897126258Smlaier else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) 5898126258Smlaier udpstat.udps_outhwcsum++; 5899126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), NULL); 5900126258Smlaier goto done; 5901126258Smlaier } 5902126261Smlaier#endif 5903126258Smlaier /* 5904126258Smlaier * Too large for interface; fragment if possible. 5905126258Smlaier * Must be able to put at least 8 bytes per fragment. 5906126258Smlaier */ 5907126258Smlaier if (ip->ip_off & htons(IP_DF)) { 5908126258Smlaier ipstat.ips_cantfrag++; 5909126258Smlaier if (r->rt != PF_DUPTO) { 5910127145Smlaier#ifdef __FreeBSD__ 5911126261Smlaier /* icmp_error() expects host byte ordering */ 5912126261Smlaier NTOHS(ip->ip_len); 5913126261Smlaier NTOHS(ip->ip_off); 5914126261Smlaier PF_UNLOCK(); 5915126258Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 5916145886Smlaier ifp->if_mtu); 5917145874Smlaier PF_LOCK(); 5918145874Smlaier#else 5919145874Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 5920145873Smlaier ifp); 5921126261Smlaier#endif 5922126258Smlaier goto done; 5923126258Smlaier } else 5924126258Smlaier goto bad; 5925126258Smlaier } 5926126258Smlaier 5927126258Smlaier m1 = m0; 5928127145Smlaier#ifdef __FreeBSD__ 5929126261Smlaier /* 5930126261Smlaier * XXX: is cheaper + less error prone than own function 5931126261Smlaier */ 5932126261Smlaier NTOHS(ip->ip_len); 5933126261Smlaier NTOHS(ip->ip_off); 5934126261Smlaier error = ip_fragment(ip, &m0, ifp->if_mtu, ifp->if_hwassist, sw_csum); 5935126261Smlaier#else 5936126258Smlaier error = ip_fragment(m0, ifp, ifp->if_mtu); 5937126261Smlaier#endif 5938127531Smlaier if (error) { 5939127531Smlaier#ifndef __FreeBSD__ /* ip_fragment does not do m_freem() on FreeBSD */ 5940127531Smlaier m0 = NULL; 5941126261Smlaier#endif 5942126258Smlaier goto bad; 5943127531Smlaier } 5944126258Smlaier 5945126258Smlaier for (m0 = m1; m0; m0 = m1) { 5946126258Smlaier m1 = m0->m_nextpkt; 5947126258Smlaier m0->m_nextpkt = 0; 5948127145Smlaier#ifdef __FreeBSD__ 5949126261Smlaier if (error == 0) { 5950126261Smlaier PF_UNLOCK(); 5951126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5952126261Smlaier NULL); 5953126261Smlaier PF_LOCK(); 5954126261Smlaier } else 5955126261Smlaier#else 5956126258Smlaier if (error == 0) 5957126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5958126258Smlaier NULL); 5959126258Smlaier else 5960126261Smlaier#endif 5961126258Smlaier m_freem(m0); 5962126258Smlaier } 5963126258Smlaier 5964126258Smlaier if (error == 0) 5965126258Smlaier ipstat.ips_fragmented++; 5966126258Smlaier 5967126258Smlaierdone: 5968126258Smlaier if (r->rt != PF_DUPTO) 5969126258Smlaier *m = NULL; 5970126258Smlaier if (ro == &iproute && ro->ro_rt) 5971126258Smlaier RTFREE(ro->ro_rt); 5972126258Smlaier return; 5973126258Smlaier 5974126258Smlaierbad: 5975126258Smlaier m_freem(m0); 5976126258Smlaier goto done; 5977126258Smlaier} 5978126258Smlaier#endif /* INET */ 5979126258Smlaier 5980126258Smlaier#ifdef INET6 5981126258Smlaiervoid 5982126258Smlaierpf_route6(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5983126258Smlaier struct pf_state *s) 5984126258Smlaier{ 5985126258Smlaier struct mbuf *m0; 5986126258Smlaier struct m_tag *mtag; 5987126258Smlaier struct route_in6 ip6route; 5988126258Smlaier struct route_in6 *ro; 5989126258Smlaier struct sockaddr_in6 *dst; 5990126258Smlaier struct ip6_hdr *ip6; 5991126258Smlaier struct ifnet *ifp = NULL; 5992126258Smlaier struct pf_addr naddr; 5993130613Smlaier struct pf_src_node *sn = NULL; 5994126258Smlaier int error = 0; 5995126258Smlaier 5996126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5997126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5998126258Smlaier panic("pf_route6: invalid parameters"); 5999126258Smlaier 6000132303Smlaier if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) { 6001132303Smlaier if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) == 6002132303Smlaier NULL) { 6003132303Smlaier m0 = *m; 6004132303Smlaier *m = NULL; 6005132303Smlaier goto bad; 6006132303Smlaier } 6007132303Smlaier *(char *)(mtag + 1) = 1; 6008132303Smlaier m_tag_prepend(*m, mtag); 6009132303Smlaier } else { 6010132303Smlaier if (*(char *)(mtag + 1) > 3) { 6011132303Smlaier m0 = *m; 6012132303Smlaier *m = NULL; 6013132303Smlaier goto bad; 6014132303Smlaier } 6015132303Smlaier (*(char *)(mtag + 1))++; 6016132303Smlaier } 6017132303Smlaier 6018126258Smlaier if (r->rt == PF_DUPTO) { 6019127145Smlaier#ifdef __FreeBSD__ 6020132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 6021126261Smlaier#else 6022132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 6023126261Smlaier#endif 6024126258Smlaier return; 6025126258Smlaier } else { 6026126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 6027126258Smlaier return; 6028126258Smlaier m0 = *m; 6029126258Smlaier } 6030126258Smlaier 6031145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 6032145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6033145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 6034145836Smlaier goto bad; 6035145836Smlaier } 6036126258Smlaier ip6 = mtod(m0, struct ip6_hdr *); 6037126258Smlaier 6038126258Smlaier ro = &ip6route; 6039126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 6040126258Smlaier dst = (struct sockaddr_in6 *)&ro->ro_dst; 6041126258Smlaier dst->sin6_family = AF_INET6; 6042126258Smlaier dst->sin6_len = sizeof(*dst); 6043126258Smlaier dst->sin6_addr = ip6->ip6_dst; 6044126258Smlaier 6045126258Smlaier /* Cheat. */ 6046126258Smlaier if (r->rt == PF_FASTROUTE) { 6047127145Smlaier#ifdef __FreeBSD__ 6048132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 6049126261Smlaier PF_UNLOCK(); 6050126261Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL, NULL); 6051126261Smlaier PF_LOCK(); 6052126261Smlaier#else 6053132280Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 6054132280Smlaier if (mtag == NULL) 6055132280Smlaier goto bad; 6056132280Smlaier m_tag_prepend(m0, mtag); 6057126258Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL); 6058126261Smlaier#endif 6059126258Smlaier return; 6060126258Smlaier } 6061126258Smlaier 6062145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 6063145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6064145836Smlaier ("pf_route6: TAILQ_EMPTY(&r->rpool.list)\n")); 6065145836Smlaier goto bad; 6066145836Smlaier } 6067126258Smlaier if (s == NULL) { 6068130613Smlaier pf_map_addr(AF_INET6, r, (struct pf_addr *)&ip6->ip6_src, 6069130613Smlaier &naddr, NULL, &sn); 6070126258Smlaier if (!PF_AZERO(&naddr, AF_INET6)) 6071126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 6072126258Smlaier &naddr, AF_INET6); 6073130613Smlaier ifp = r->rpool.cur->kif ? r->rpool.cur->kif->pfik_ifp : NULL; 6074126258Smlaier } else { 6075126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET6)) 6076126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 6077126258Smlaier &s->rt_addr, AF_INET6); 6078130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 6079126258Smlaier } 6080126258Smlaier if (ifp == NULL) 6081126258Smlaier goto bad; 6082126258Smlaier 6083126258Smlaier if (oifp != ifp) { 6084127145Smlaier#ifdef __FreeBSD__ 6085132303Smlaier PF_UNLOCK(); 6086145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 6087126261Smlaier PF_LOCK(); 6088132303Smlaier goto bad; 6089132303Smlaier } else if (m0 == NULL) { 6090132303Smlaier PF_LOCK(); 6091132303Smlaier goto done; 6092132303Smlaier } 6093132303Smlaier PF_LOCK(); 6094126261Smlaier#else 6095145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL) != PF_PASS) 6096132303Smlaier goto bad; 6097132303Smlaier else if (m0 == NULL) 6098132303Smlaier goto done; 6099126261Smlaier#endif 6100145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 6101145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6102145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 6103145836Smlaier goto bad; 6104145836Smlaier } 6105132303Smlaier ip6 = mtod(m0, struct ip6_hdr *); 6106126258Smlaier } 6107126258Smlaier 6108126258Smlaier /* 6109126258Smlaier * If the packet is too large for the outgoing interface, 6110126258Smlaier * send back an icmp6 error. 6111126258Smlaier */ 6112126258Smlaier if (IN6_IS_ADDR_LINKLOCAL(&dst->sin6_addr)) 6113126258Smlaier dst->sin6_addr.s6_addr16[1] = htons(ifp->if_index); 6114126258Smlaier if ((u_long)m0->m_pkthdr.len <= ifp->if_mtu) { 6115127145Smlaier#ifdef __FreeBSD__ 6116126261Smlaier PF_UNLOCK(); 6117126261Smlaier#endif 6118126258Smlaier error = nd6_output(ifp, ifp, m0, dst, NULL); 6119127145Smlaier#ifdef __FreeBSD__ 6120126261Smlaier PF_LOCK(); 6121126261Smlaier#endif 6122126258Smlaier } else { 6123126258Smlaier in6_ifstat_inc(ifp, ifs6_in_toobig); 6124127145Smlaier#ifdef __FreeBSD__ 6125126261Smlaier if (r->rt != PF_DUPTO) { 6126126261Smlaier PF_UNLOCK(); 6127126261Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6128126261Smlaier PF_LOCK(); 6129126261Smlaier } else 6130126261Smlaier#else 6131126258Smlaier if (r->rt != PF_DUPTO) 6132126258Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6133126258Smlaier else 6134126261Smlaier#endif 6135126258Smlaier goto bad; 6136126258Smlaier } 6137126258Smlaier 6138126258Smlaierdone: 6139126258Smlaier if (r->rt != PF_DUPTO) 6140126258Smlaier *m = NULL; 6141126258Smlaier return; 6142126258Smlaier 6143126258Smlaierbad: 6144126258Smlaier m_freem(m0); 6145126258Smlaier goto done; 6146126258Smlaier} 6147126258Smlaier#endif /* INET6 */ 6148126258Smlaier 6149126258Smlaier 6150127145Smlaier#ifdef __FreeBSD__ 6151126258Smlaier/* 6152132566Smlaier * FreeBSD supports cksum offloads for the following drivers. 6153137413Sru * em(4), fxp(4), ixgb(4), lge(4), ndis(4), nge(4), re(4), 6154132566Smlaier * ti(4), txp(4), xl(4) 6155132566Smlaier * 6156132566Smlaier * CSUM_DATA_VALID | CSUM_PSEUDO_HDR : 6157132566Smlaier * network driver performed cksum including pseudo header, need to verify 6158132566Smlaier * csum_data 6159132566Smlaier * CSUM_DATA_VALID : 6160132566Smlaier * network driver performed cksum, needs to additional pseudo header 6161132566Smlaier * cksum computation with partial csum_data(i.e. lack of H/W support for 6162132566Smlaier * pseudo header, for instance hme(4), sk(4) and possibly gem(4)) 6163132566Smlaier * 6164132566Smlaier * After validating the cksum of packet, set both flag CSUM_DATA_VALID and 6165132566Smlaier * CSUM_PSEUDO_HDR in order to avoid recomputation of the cksum in upper 6166132566Smlaier * TCP/UDP layer. 6167132566Smlaier * Also, set csum_data to 0xffff to force cksum validation. 6168126261Smlaier */ 6169126261Smlaierint 6170126261Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, sa_family_t af) 6171126261Smlaier{ 6172126261Smlaier u_int16_t sum = 0; 6173126261Smlaier int hw_assist = 0; 6174126261Smlaier struct ip *ip; 6175126261Smlaier 6176126261Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6177126261Smlaier return (1); 6178126261Smlaier if (m->m_pkthdr.len < off + len) 6179126261Smlaier return (1); 6180126261Smlaier 6181126261Smlaier switch (p) { 6182126261Smlaier case IPPROTO_TCP: 6183126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6184126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6185126261Smlaier sum = m->m_pkthdr.csum_data; 6186126261Smlaier } else { 6187126261Smlaier ip = mtod(m, struct ip *); 6188126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6189135078Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6190135078Smlaier m->m_pkthdr.csum_data + IPPROTO_TCP)); 6191126261Smlaier } 6192126261Smlaier sum ^= 0xffff; 6193126261Smlaier ++hw_assist; 6194126261Smlaier } 6195126261Smlaier break; 6196126261Smlaier case IPPROTO_UDP: 6197126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6198126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6199126261Smlaier sum = m->m_pkthdr.csum_data; 6200126261Smlaier } else { 6201126261Smlaier ip = mtod(m, struct ip *); 6202126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6203126261Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6204126261Smlaier m->m_pkthdr.csum_data + IPPROTO_UDP)); 6205126261Smlaier } 6206126261Smlaier sum ^= 0xffff; 6207126261Smlaier ++hw_assist; 6208126261Smlaier } 6209126261Smlaier break; 6210126261Smlaier case IPPROTO_ICMP: 6211126261Smlaier#ifdef INET6 6212126261Smlaier case IPPROTO_ICMPV6: 6213126261Smlaier#endif /* INET6 */ 6214126261Smlaier break; 6215126261Smlaier default: 6216126261Smlaier return (1); 6217126261Smlaier } 6218126261Smlaier 6219126261Smlaier if (!hw_assist) { 6220126261Smlaier switch (af) { 6221126261Smlaier case AF_INET: 6222126261Smlaier if (p == IPPROTO_ICMP) { 6223126261Smlaier if (m->m_len < off) 6224126261Smlaier return (1); 6225126261Smlaier m->m_data += off; 6226126261Smlaier m->m_len -= off; 6227126261Smlaier sum = in_cksum(m, len); 6228126261Smlaier m->m_data -= off; 6229126261Smlaier m->m_len += off; 6230126261Smlaier } else { 6231126261Smlaier if (m->m_len < sizeof(struct ip)) 6232126261Smlaier return (1); 6233126261Smlaier sum = in4_cksum(m, p, off, len); 6234126261Smlaier } 6235126261Smlaier break; 6236126261Smlaier#ifdef INET6 6237126261Smlaier case AF_INET6: 6238126261Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6239126261Smlaier return (1); 6240126261Smlaier sum = in6_cksum(m, p, off, len); 6241126261Smlaier break; 6242126261Smlaier#endif /* INET6 */ 6243126261Smlaier default: 6244126261Smlaier return (1); 6245126261Smlaier } 6246126261Smlaier } 6247126261Smlaier if (sum) { 6248126261Smlaier switch (p) { 6249126261Smlaier case IPPROTO_TCP: 6250126261Smlaier tcpstat.tcps_rcvbadsum++; 6251126261Smlaier break; 6252126261Smlaier case IPPROTO_UDP: 6253126261Smlaier udpstat.udps_badsum++; 6254126261Smlaier break; 6255126261Smlaier case IPPROTO_ICMP: 6256126261Smlaier icmpstat.icps_checksum++; 6257126261Smlaier break; 6258126261Smlaier#ifdef INET6 6259126261Smlaier case IPPROTO_ICMPV6: 6260126261Smlaier icmp6stat.icp6s_checksum++; 6261126261Smlaier break; 6262126261Smlaier#endif /* INET6 */ 6263126261Smlaier } 6264126261Smlaier return (1); 6265132566Smlaier } else { 6266132566Smlaier if (p == IPPROTO_TCP || p == IPPROTO_UDP) { 6267132566Smlaier m->m_pkthdr.csum_flags |= 6268132566Smlaier (CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 6269132566Smlaier m->m_pkthdr.csum_data = 0xffff; 6270132566Smlaier } 6271126261Smlaier } 6272126261Smlaier return (0); 6273126261Smlaier} 6274126261Smlaier#else 6275126261Smlaier/* 6276126258Smlaier * check protocol (tcp/udp/icmp/icmp6) checksum and set mbuf flag 6277126258Smlaier * off is the offset where the protocol header starts 6278126258Smlaier * len is the total length of protocol header plus payload 6279126258Smlaier * returns 0 when the checksum is valid, otherwise returns 1. 6280126258Smlaier */ 6281126258Smlaierint 6282130613Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, 6283130613Smlaier sa_family_t af) 6284126258Smlaier{ 6285126258Smlaier u_int16_t flag_ok, flag_bad; 6286126258Smlaier u_int16_t sum; 6287126258Smlaier 6288126258Smlaier switch (p) { 6289126258Smlaier case IPPROTO_TCP: 6290126258Smlaier flag_ok = M_TCP_CSUM_IN_OK; 6291126258Smlaier flag_bad = M_TCP_CSUM_IN_BAD; 6292126258Smlaier break; 6293126258Smlaier case IPPROTO_UDP: 6294126258Smlaier flag_ok = M_UDP_CSUM_IN_OK; 6295126258Smlaier flag_bad = M_UDP_CSUM_IN_BAD; 6296126258Smlaier break; 6297126258Smlaier case IPPROTO_ICMP: 6298126258Smlaier#ifdef INET6 6299126258Smlaier case IPPROTO_ICMPV6: 6300126258Smlaier#endif /* INET6 */ 6301126258Smlaier flag_ok = flag_bad = 0; 6302126258Smlaier break; 6303126258Smlaier default: 6304126258Smlaier return (1); 6305126258Smlaier } 6306126258Smlaier if (m->m_pkthdr.csum & flag_ok) 6307126258Smlaier return (0); 6308126258Smlaier if (m->m_pkthdr.csum & flag_bad) 6309126258Smlaier return (1); 6310126258Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6311126258Smlaier return (1); 6312126258Smlaier if (m->m_pkthdr.len < off + len) 6313126258Smlaier return (1); 6314145836Smlaier switch (af) { 6315145836Smlaier#ifdef INET 6316126258Smlaier case AF_INET: 6317126258Smlaier if (p == IPPROTO_ICMP) { 6318126258Smlaier if (m->m_len < off) 6319126258Smlaier return (1); 6320126258Smlaier m->m_data += off; 6321126258Smlaier m->m_len -= off; 6322126258Smlaier sum = in_cksum(m, len); 6323126258Smlaier m->m_data -= off; 6324126258Smlaier m->m_len += off; 6325126258Smlaier } else { 6326126258Smlaier if (m->m_len < sizeof(struct ip)) 6327126258Smlaier return (1); 6328126258Smlaier sum = in4_cksum(m, p, off, len); 6329126258Smlaier } 6330126258Smlaier break; 6331145836Smlaier#endif /* INET */ 6332126258Smlaier#ifdef INET6 6333126258Smlaier case AF_INET6: 6334126258Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6335126258Smlaier return (1); 6336126258Smlaier sum = in6_cksum(m, p, off, len); 6337126258Smlaier break; 6338126258Smlaier#endif /* INET6 */ 6339126258Smlaier default: 6340126258Smlaier return (1); 6341126258Smlaier } 6342126258Smlaier if (sum) { 6343126258Smlaier m->m_pkthdr.csum |= flag_bad; 6344126258Smlaier switch (p) { 6345126258Smlaier case IPPROTO_TCP: 6346126258Smlaier tcpstat.tcps_rcvbadsum++; 6347126258Smlaier break; 6348126258Smlaier case IPPROTO_UDP: 6349126258Smlaier udpstat.udps_badsum++; 6350126258Smlaier break; 6351126258Smlaier case IPPROTO_ICMP: 6352126258Smlaier icmpstat.icps_checksum++; 6353126258Smlaier break; 6354126258Smlaier#ifdef INET6 6355126258Smlaier case IPPROTO_ICMPV6: 6356126258Smlaier icmp6stat.icp6s_checksum++; 6357126258Smlaier break; 6358126258Smlaier#endif /* INET6 */ 6359126258Smlaier } 6360126258Smlaier return (1); 6361126258Smlaier } 6362126258Smlaier m->m_pkthdr.csum |= flag_ok; 6363126258Smlaier return (0); 6364126258Smlaier} 6365126261Smlaier#endif 6366126258Smlaier 6367130613Smlaierstatic int 6368130613Smlaierpf_add_mbuf_tag(struct mbuf *m, u_int tag) 6369130613Smlaier{ 6370130613Smlaier struct m_tag *mtag; 6371130613Smlaier 6372130613Smlaier if (m_tag_find(m, tag, NULL) != NULL) 6373130613Smlaier return (0); 6374130613Smlaier mtag = m_tag_get(tag, 0, M_NOWAIT); 6375130613Smlaier if (mtag == NULL) 6376130613Smlaier return (1); 6377130613Smlaier m_tag_prepend(m, mtag); 6378130613Smlaier return (0); 6379130613Smlaier} 6380130613Smlaier 6381126258Smlaier#ifdef INET 6382126258Smlaierint 6383135920Smlaier#ifdef __FreeBSD__ 6384145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6385145836Smlaier struct ether_header *eh, struct inpcb *inp) 6386135920Smlaier#else 6387145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6388145836Smlaier struct ether_header *eh) 6389135920Smlaier#endif 6390126258Smlaier{ 6391130613Smlaier struct pfi_kif *kif; 6392130613Smlaier u_short action, reason = 0, log = 0; 6393130613Smlaier struct mbuf *m = *m0; 6394130613Smlaier struct ip *h = NULL; /* make the compiler happy */ 6395130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6396130613Smlaier struct pf_state *s = NULL; 6397130613Smlaier struct pf_ruleset *ruleset = NULL; 6398130613Smlaier struct pf_pdesc pd; 6399130613Smlaier int off, dirndx, pqid = 0; 6400126258Smlaier 6401127145Smlaier#ifdef __FreeBSD__ 6402126261Smlaier PF_LOCK(); 6403126261Smlaier#endif 6404126258Smlaier if (!pf_status.running || 6405127145Smlaier#ifdef __FreeBSD__ 6406132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 6407126261Smlaier PF_UNLOCK(); 6408132280Smlaier#else 6409132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 6410126261Smlaier#endif 6411126261Smlaier return (PF_PASS); 6412126261Smlaier } 6413126258Smlaier 6414145836Smlaier#ifdef __FreeBSD__ 6415145836Smlaier /* XXX_IMPORT: later */ 6416145836Smlaier#else 6417145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 6418145836Smlaier ifp = ifp->if_carpdev; 6419145836Smlaier#endif 6420145836Smlaier 6421130613Smlaier kif = pfi_index2kif[ifp->if_index]; 6422130613Smlaier if (kif == NULL) { 6423130613Smlaier#ifdef __FreeBSD__ 6424130613Smlaier PF_UNLOCK(); 6425130613Smlaier#endif 6426145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6427145836Smlaier ("pf_test: kif == NULL, if_xname %s\n", ifp->if_xname)); 6428130613Smlaier return (PF_DROP); 6429130613Smlaier } 6430145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 6431145836Smlaier#ifdef __FreeBSD__ 6432145836Smlaier PF_UNLOCK(); 6433145836Smlaier#endif 6434145836Smlaier return (PF_PASS); 6435145836Smlaier } 6436130613Smlaier 6437130613Smlaier#ifdef __FreeBSD__ 6438126261Smlaier M_ASSERTPKTHDR(m); 6439126261Smlaier#else 6440126258Smlaier#ifdef DIAGNOSTIC 6441126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6442126258Smlaier panic("non-M_PKTHDR is passed to pf_test"); 6443145836Smlaier#endif /* DIAGNOSTIC */ 6444145836Smlaier#endif /* __FreeBSD__ */ 6445126258Smlaier 6446130613Smlaier memset(&pd, 0, sizeof(pd)); 6447126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6448126258Smlaier action = PF_DROP; 6449126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6450126258Smlaier log = 1; 6451126258Smlaier goto done; 6452126258Smlaier } 6453126258Smlaier 6454126258Smlaier /* We do IP header normalization and packet reassembly here */ 6455145836Smlaier if (pf_normalize_ip(m0, dir, kif, &reason, &pd) != PF_PASS) { 6456126258Smlaier action = PF_DROP; 6457126258Smlaier goto done; 6458126258Smlaier } 6459126258Smlaier m = *m0; 6460126258Smlaier h = mtod(m, struct ip *); 6461126258Smlaier 6462126258Smlaier off = h->ip_hl << 2; 6463126258Smlaier if (off < (int)sizeof(*h)) { 6464126258Smlaier action = PF_DROP; 6465126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6466126258Smlaier log = 1; 6467126258Smlaier goto done; 6468126258Smlaier } 6469126258Smlaier 6470126258Smlaier pd.src = (struct pf_addr *)&h->ip_src; 6471126258Smlaier pd.dst = (struct pf_addr *)&h->ip_dst; 6472130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET); 6473126258Smlaier pd.ip_sum = &h->ip_sum; 6474126258Smlaier pd.proto = h->ip_p; 6475126258Smlaier pd.af = AF_INET; 6476126258Smlaier pd.tos = h->ip_tos; 6477126258Smlaier pd.tot_len = ntohs(h->ip_len); 6478145836Smlaier pd.eh = eh; 6479126258Smlaier 6480126258Smlaier /* handle fragments that didn't get reassembled by normalization */ 6481126258Smlaier if (h->ip_off & htons(IP_MF | IP_OFFMASK)) { 6482130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6483126258Smlaier &pd, &a, &ruleset); 6484126258Smlaier goto done; 6485126258Smlaier } 6486126258Smlaier 6487126258Smlaier switch (h->ip_p) { 6488126258Smlaier 6489126258Smlaier case IPPROTO_TCP: { 6490126258Smlaier struct tcphdr th; 6491126258Smlaier 6492126258Smlaier pd.hdr.tcp = &th; 6493126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6494126258Smlaier &action, &reason, AF_INET)) { 6495126258Smlaier log = action != PF_PASS; 6496126258Smlaier goto done; 6497126258Smlaier } 6498126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6499126258Smlaier ntohs(h->ip_len) - off, IPPROTO_TCP, AF_INET)) { 6500126258Smlaier action = PF_DROP; 6501126258Smlaier goto done; 6502126258Smlaier } 6503126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6504126258Smlaier if ((th.th_flags & TH_ACK) && pd.p_len == 0) 6505126258Smlaier pqid = 1; 6506130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6507126258Smlaier if (action == PF_DROP) 6508130613Smlaier goto done; 6509130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6510126258Smlaier &reason); 6511126258Smlaier if (action == PF_PASS) { 6512130613Smlaier#if NPFSYNC 6513130613Smlaier pfsync_update_state(s); 6514145836Smlaier#endif /* NPFSYNC */ 6515126258Smlaier r = s->rule.ptr; 6516130613Smlaier a = s->anchor.ptr; 6517126258Smlaier log = s->log; 6518126258Smlaier } else if (s == NULL) 6519135920Smlaier#ifdef __FreeBSD__ 6520130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6521145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6522135920Smlaier#else 6523135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6524145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6525135920Smlaier#endif 6526126258Smlaier break; 6527126258Smlaier } 6528126258Smlaier 6529126258Smlaier case IPPROTO_UDP: { 6530126258Smlaier struct udphdr uh; 6531126258Smlaier 6532126258Smlaier pd.hdr.udp = &uh; 6533126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6534126258Smlaier &action, &reason, AF_INET)) { 6535126258Smlaier log = action != PF_PASS; 6536126258Smlaier goto done; 6537126258Smlaier } 6538126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6539126258Smlaier off, ntohs(h->ip_len) - off, IPPROTO_UDP, AF_INET)) { 6540126258Smlaier action = PF_DROP; 6541126258Smlaier goto done; 6542126258Smlaier } 6543130613Smlaier if (uh.uh_dport == 0 || 6544130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6545130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6546130613Smlaier action = PF_DROP; 6547130613Smlaier goto done; 6548130613Smlaier } 6549130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6550126258Smlaier if (action == PF_PASS) { 6551130613Smlaier#if NPFSYNC 6552130613Smlaier pfsync_update_state(s); 6553145836Smlaier#endif /* NPFSYNC */ 6554126258Smlaier r = s->rule.ptr; 6555126258Smlaier a = s->anchor.ptr; 6556126258Smlaier log = s->log; 6557126258Smlaier } else if (s == NULL) 6558135920Smlaier#ifdef __FreeBSD__ 6559130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6560145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6561135920Smlaier#else 6562135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 6563145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6564135920Smlaier#endif 6565126258Smlaier break; 6566126258Smlaier } 6567126258Smlaier 6568126258Smlaier case IPPROTO_ICMP: { 6569126258Smlaier struct icmp ih; 6570126258Smlaier 6571126258Smlaier pd.hdr.icmp = &ih; 6572126258Smlaier if (!pf_pull_hdr(m, off, &ih, ICMP_MINLEN, 6573126258Smlaier &action, &reason, AF_INET)) { 6574126258Smlaier log = action != PF_PASS; 6575126258Smlaier goto done; 6576126258Smlaier } 6577126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6578126258Smlaier ntohs(h->ip_len) - off, IPPROTO_ICMP, AF_INET)) { 6579126258Smlaier action = PF_DROP; 6580126258Smlaier goto done; 6581126258Smlaier } 6582145836Smlaier action = pf_test_state_icmp(&s, dir, kif, m, off, h, &pd, 6583145836Smlaier &reason); 6584126258Smlaier if (action == PF_PASS) { 6585130613Smlaier#if NPFSYNC 6586130613Smlaier pfsync_update_state(s); 6587145836Smlaier#endif /* NPFSYNC */ 6588126258Smlaier r = s->rule.ptr; 6589126258Smlaier a = s->anchor.ptr; 6590126258Smlaier log = s->log; 6591126258Smlaier } else if (s == NULL) 6592145836Smlaier#ifdef __FreeBSD__ 6593130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6594145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 6595145836Smlaier#else 6596145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6597145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6598145836Smlaier#endif 6599126258Smlaier break; 6600126258Smlaier } 6601126258Smlaier 6602126258Smlaier default: 6603130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 6604126258Smlaier if (action == PF_PASS) { 6605130613Smlaier#if NPFSYNC 6606130613Smlaier pfsync_update_state(s); 6607145836Smlaier#endif /* NPFSYNC */ 6608126258Smlaier r = s->rule.ptr; 6609126258Smlaier a = s->anchor.ptr; 6610126258Smlaier log = s->log; 6611126258Smlaier } else if (s == NULL) 6612145836Smlaier#ifdef __FreeBSD__ 6613130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6614145836Smlaier &pd, &a, &ruleset, NULL); 6615145836Smlaier#else 6616145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6617145836Smlaier &pd, &a, &ruleset, &ipintrq); 6618145836Smlaier#endif 6619126258Smlaier break; 6620126258Smlaier } 6621126258Smlaier 6622126258Smlaierdone: 6623126258Smlaier if (action == PF_PASS && h->ip_hl > 5 && 6624126258Smlaier !((s && s->allow_opts) || r->allow_opts)) { 6625126258Smlaier action = PF_DROP; 6626145836Smlaier REASON_SET(&reason, PFRES_IPOPTIONS); 6627126258Smlaier log = 1; 6628126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 6629126258Smlaier ("pf: dropping packet with ip options\n")); 6630126258Smlaier } 6631126258Smlaier 6632145836Smlaier if (s && s->tag) 6633145836Smlaier pf_tag_packet(m, pf_get_tag(m), s->tag); 6634145836Smlaier 6635126258Smlaier#ifdef ALTQ 6636126258Smlaier if (action == PF_PASS && r->qid) { 6637126258Smlaier struct m_tag *mtag; 6638126258Smlaier struct altq_tag *atag; 6639126258Smlaier 6640126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 6641126258Smlaier if (mtag != NULL) { 6642126258Smlaier atag = (struct altq_tag *)(mtag + 1); 6643126258Smlaier if (pqid || pd.tos == IPTOS_LOWDELAY) 6644126258Smlaier atag->qid = r->pqid; 6645126258Smlaier else 6646126258Smlaier atag->qid = r->qid; 6647126258Smlaier /* add hints for ecn */ 6648126258Smlaier atag->af = AF_INET; 6649126258Smlaier atag->hdr = h; 6650126258Smlaier m_tag_prepend(m, mtag); 6651126258Smlaier } 6652126258Smlaier } 6653145836Smlaier#endif /* ALTQ */ 6654126258Smlaier 6655130613Smlaier /* 6656130613Smlaier * connections redirected to loopback should not match sockets 6657130613Smlaier * bound specifically to loopback due to security implications, 6658130613Smlaier * see tcp_input() and in_pcblookup_listen(). 6659130613Smlaier */ 6660130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 6661130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 6662130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 6663130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 6664130613Smlaier (ntohl(pd.dst->v4.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET && 6665130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 6666130613Smlaier action = PF_DROP; 6667130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 6668130613Smlaier } 6669130613Smlaier 6670126258Smlaier if (log) 6671130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET, dir, reason, r, a, ruleset); 6672126258Smlaier 6673130613Smlaier kif->pfik_bytes[0][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 6674130613Smlaier kif->pfik_packets[0][dir == PF_OUT][action != PF_PASS]++; 6675130613Smlaier 6676130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 6677130613Smlaier r->packets++; 6678130613Smlaier r->bytes += pd.tot_len; 6679130613Smlaier if (a != NULL) { 6680130613Smlaier a->packets++; 6681130613Smlaier a->bytes += pd.tot_len; 6682130613Smlaier } 6683130613Smlaier if (s != NULL) { 6684130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 6685130613Smlaier s->packets[dirndx]++; 6686130613Smlaier s->bytes[dirndx] += pd.tot_len; 6687130613Smlaier if (s->nat_rule.ptr != NULL) { 6688130613Smlaier s->nat_rule.ptr->packets++; 6689130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 6690130613Smlaier } 6691130613Smlaier if (s->src_node != NULL) { 6692130613Smlaier s->src_node->packets++; 6693130613Smlaier s->src_node->bytes += pd.tot_len; 6694130613Smlaier } 6695130613Smlaier if (s->nat_src_node != NULL) { 6696130613Smlaier s->nat_src_node->packets++; 6697130613Smlaier s->nat_src_node->bytes += pd.tot_len; 6698130613Smlaier } 6699130613Smlaier } 6700130613Smlaier tr = r; 6701130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 6702130613Smlaier if (nr != NULL) { 6703130613Smlaier struct pf_addr *x; 6704130613Smlaier /* 6705130613Smlaier * XXX: we need to make sure that the addresses 6706130613Smlaier * passed to pfr_update_stats() are the same than 6707130613Smlaier * the addresses used during matching (pfr_match) 6708130613Smlaier */ 6709130613Smlaier if (r == &pf_default_rule) { 6710130613Smlaier tr = nr; 6711130613Smlaier x = (s == NULL || s->direction == dir) ? 6712130613Smlaier &pd.baddr : &pd.naddr; 6713130613Smlaier } else 6714130613Smlaier x = (s == NULL || s->direction == dir) ? 6715130613Smlaier &pd.naddr : &pd.baddr; 6716130613Smlaier if (x == &pd.baddr || s == NULL) { 6717130613Smlaier /* we need to change the address */ 6718130613Smlaier if (dir == PF_OUT) 6719130613Smlaier pd.src = x; 6720130613Smlaier else 6721130613Smlaier pd.dst = x; 6722130613Smlaier } 6723130613Smlaier } 6724130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 6725130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 6726130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 6727130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6728145836Smlaier tr->src.neg); 6729130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 6730130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 6731130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 6732130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6733145836Smlaier tr->dst.neg); 6734130613Smlaier } 6735130613Smlaier 6736130613Smlaier 6737126258Smlaier if (action == PF_SYNPROXY_DROP) { 6738126258Smlaier m_freem(*m0); 6739126258Smlaier *m0 = NULL; 6740126258Smlaier action = PF_PASS; 6741126258Smlaier } else if (r->rt) 6742126258Smlaier /* pf_route can free the mbuf causing *m0 to become NULL */ 6743126258Smlaier pf_route(m0, r, dir, ifp, s); 6744126258Smlaier 6745127145Smlaier#ifdef __FreeBSD__ 6746126261Smlaier PF_UNLOCK(); 6747126261Smlaier#endif 6748126261Smlaier 6749126258Smlaier return (action); 6750126258Smlaier} 6751126258Smlaier#endif /* INET */ 6752126258Smlaier 6753126258Smlaier#ifdef INET6 6754126258Smlaierint 6755135920Smlaier#ifdef __FreeBSD__ 6756145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 6757145836Smlaier struct ether_header *eh, struct inpcb *inp) 6758135920Smlaier#else 6759145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 6760145836Smlaier struct ether_header *eh) 6761135920Smlaier#endif 6762126258Smlaier{ 6763130613Smlaier struct pfi_kif *kif; 6764130613Smlaier u_short action, reason = 0, log = 0; 6765130613Smlaier struct mbuf *m = *m0; 6766130613Smlaier struct ip6_hdr *h = NULL; /* make the compiler happy */ 6767130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6768130613Smlaier struct pf_state *s = NULL; 6769130613Smlaier struct pf_ruleset *ruleset = NULL; 6770130613Smlaier struct pf_pdesc pd; 6771130613Smlaier int off, terminal = 0, dirndx; 6772126258Smlaier 6773127145Smlaier#ifdef __FreeBSD__ 6774126261Smlaier PF_LOCK(); 6775126261Smlaier#endif 6776126261Smlaier 6777126258Smlaier if (!pf_status.running || 6778127145Smlaier#ifdef __FreeBSD__ 6779132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 6780126261Smlaier PF_UNLOCK(); 6781132280Smlaier#else 6782132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 6783126261Smlaier#endif 6784126258Smlaier return (PF_PASS); 6785126261Smlaier } 6786126258Smlaier 6787145836Smlaier#ifdef __FreeBSD__ 6788145836Smlaier /* XXX_IMPORT: later */ 6789145836Smlaier#else 6790145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 6791145836Smlaier ifp = ifp->if_carpdev; 6792145836Smlaier#endif 6793145836Smlaier 6794130613Smlaier kif = pfi_index2kif[ifp->if_index]; 6795130613Smlaier if (kif == NULL) { 6796130613Smlaier#ifdef __FreeBSD__ 6797130613Smlaier PF_UNLOCK(); 6798130613Smlaier#endif 6799145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6800145836Smlaier ("pf_test6: kif == NULL, if_xname %s\n", ifp->if_xname)); 6801130613Smlaier return (PF_DROP); 6802130613Smlaier } 6803145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 6804145836Smlaier#ifdef __FreeBSD__ 6805145836Smlaier PF_UNLOCK(); 6806145836Smlaier#endif 6807145836Smlaier return (PF_PASS); 6808145836Smlaier } 6809130613Smlaier 6810130613Smlaier#ifdef __FreeBSD__ 6811126261Smlaier M_ASSERTPKTHDR(m); 6812126261Smlaier#else 6813126258Smlaier#ifdef DIAGNOSTIC 6814126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6815145836Smlaier panic("non-M_PKTHDR is passed to pf_test6"); 6816145836Smlaier#endif /* DIAGNOSTIC */ 6817126258Smlaier#endif 6818126258Smlaier 6819130613Smlaier memset(&pd, 0, sizeof(pd)); 6820126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6821126258Smlaier action = PF_DROP; 6822126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6823126258Smlaier log = 1; 6824126258Smlaier goto done; 6825126258Smlaier } 6826126258Smlaier 6827126258Smlaier /* We do IP header normalization and packet reassembly here */ 6828145836Smlaier if (pf_normalize_ip6(m0, dir, kif, &reason, &pd) != PF_PASS) { 6829126258Smlaier action = PF_DROP; 6830126258Smlaier goto done; 6831126258Smlaier } 6832126258Smlaier m = *m0; 6833126258Smlaier h = mtod(m, struct ip6_hdr *); 6834126258Smlaier 6835126258Smlaier pd.src = (struct pf_addr *)&h->ip6_src; 6836126258Smlaier pd.dst = (struct pf_addr *)&h->ip6_dst; 6837130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET6); 6838126258Smlaier pd.ip_sum = NULL; 6839126258Smlaier pd.af = AF_INET6; 6840126258Smlaier pd.tos = 0; 6841126258Smlaier pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); 6842145836Smlaier pd.eh = eh; 6843126258Smlaier 6844126258Smlaier off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); 6845126258Smlaier pd.proto = h->ip6_nxt; 6846126258Smlaier do { 6847126258Smlaier switch (pd.proto) { 6848126258Smlaier case IPPROTO_FRAGMENT: 6849130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6850126258Smlaier &pd, &a, &ruleset); 6851126258Smlaier if (action == PF_DROP) 6852126258Smlaier REASON_SET(&reason, PFRES_FRAG); 6853126258Smlaier goto done; 6854126258Smlaier case IPPROTO_AH: 6855126258Smlaier case IPPROTO_HOPOPTS: 6856126258Smlaier case IPPROTO_ROUTING: 6857126258Smlaier case IPPROTO_DSTOPTS: { 6858126258Smlaier /* get next header and header length */ 6859126258Smlaier struct ip6_ext opt6; 6860126258Smlaier 6861126258Smlaier if (!pf_pull_hdr(m, off, &opt6, sizeof(opt6), 6862145836Smlaier NULL, &reason, pd.af)) { 6863126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 6864126258Smlaier ("pf: IPv6 short opt\n")); 6865126258Smlaier action = PF_DROP; 6866126258Smlaier log = 1; 6867126258Smlaier goto done; 6868126258Smlaier } 6869126258Smlaier if (pd.proto == IPPROTO_AH) 6870126258Smlaier off += (opt6.ip6e_len + 2) * 4; 6871126258Smlaier else 6872126258Smlaier off += (opt6.ip6e_len + 1) * 8; 6873126258Smlaier pd.proto = opt6.ip6e_nxt; 6874126258Smlaier /* goto the next header */ 6875126258Smlaier break; 6876126258Smlaier } 6877126258Smlaier default: 6878126258Smlaier terminal++; 6879126258Smlaier break; 6880126258Smlaier } 6881126258Smlaier } while (!terminal); 6882126258Smlaier 6883126258Smlaier switch (pd.proto) { 6884126258Smlaier 6885126258Smlaier case IPPROTO_TCP: { 6886126258Smlaier struct tcphdr th; 6887126258Smlaier 6888126258Smlaier pd.hdr.tcp = &th; 6889126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6890126258Smlaier &action, &reason, AF_INET6)) { 6891126258Smlaier log = action != PF_PASS; 6892126258Smlaier goto done; 6893126258Smlaier } 6894126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6895138387Sdhartmei ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6896138387Sdhartmei IPPROTO_TCP, AF_INET6)) { 6897126258Smlaier action = PF_DROP; 6898145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6899126258Smlaier goto done; 6900126258Smlaier } 6901126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6902130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6903126258Smlaier if (action == PF_DROP) 6904130613Smlaier goto done; 6905130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6906126258Smlaier &reason); 6907126258Smlaier if (action == PF_PASS) { 6908130613Smlaier#if NPFSYNC 6909130613Smlaier pfsync_update_state(s); 6910145836Smlaier#endif /* NPFSYNC */ 6911126258Smlaier r = s->rule.ptr; 6912130613Smlaier a = s->anchor.ptr; 6913126258Smlaier log = s->log; 6914126258Smlaier } else if (s == NULL) 6915135920Smlaier#ifdef __FreeBSD__ 6916130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6917145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6918135920Smlaier#else 6919135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6920145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6921135920Smlaier#endif 6922126258Smlaier break; 6923126258Smlaier } 6924126258Smlaier 6925126258Smlaier case IPPROTO_UDP: { 6926126258Smlaier struct udphdr uh; 6927126258Smlaier 6928126258Smlaier pd.hdr.udp = &uh; 6929126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6930126258Smlaier &action, &reason, AF_INET6)) { 6931126258Smlaier log = action != PF_PASS; 6932126258Smlaier goto done; 6933126258Smlaier } 6934126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6935138387Sdhartmei off, ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6936138387Sdhartmei IPPROTO_UDP, AF_INET6)) { 6937126258Smlaier action = PF_DROP; 6938145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6939126258Smlaier goto done; 6940126258Smlaier } 6941130613Smlaier if (uh.uh_dport == 0 || 6942130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6943130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6944130613Smlaier action = PF_DROP; 6945130613Smlaier goto done; 6946130613Smlaier } 6947130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6948126258Smlaier if (action == PF_PASS) { 6949130613Smlaier#if NPFSYNC 6950130613Smlaier pfsync_update_state(s); 6951145836Smlaier#endif /* NPFSYNC */ 6952126258Smlaier r = s->rule.ptr; 6953130613Smlaier a = s->anchor.ptr; 6954126258Smlaier log = s->log; 6955126258Smlaier } else if (s == NULL) 6956135920Smlaier#ifdef __FreeBSD__ 6957130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6958145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6959135920Smlaier#else 6960135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 6961145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6962135920Smlaier#endif 6963126258Smlaier break; 6964126258Smlaier } 6965126258Smlaier 6966126258Smlaier case IPPROTO_ICMPV6: { 6967126258Smlaier struct icmp6_hdr ih; 6968126258Smlaier 6969126258Smlaier pd.hdr.icmp6 = &ih; 6970126258Smlaier if (!pf_pull_hdr(m, off, &ih, sizeof(ih), 6971126258Smlaier &action, &reason, AF_INET6)) { 6972126258Smlaier log = action != PF_PASS; 6973126258Smlaier goto done; 6974126258Smlaier } 6975126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6976145836Smlaier ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6977138387Sdhartmei IPPROTO_ICMPV6, AF_INET6)) { 6978126258Smlaier action = PF_DROP; 6979145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6980126258Smlaier goto done; 6981126258Smlaier } 6982130613Smlaier action = pf_test_state_icmp(&s, dir, kif, 6983145836Smlaier m, off, h, &pd, &reason); 6984126258Smlaier if (action == PF_PASS) { 6985130613Smlaier#if NPFSYNC 6986130613Smlaier pfsync_update_state(s); 6987145836Smlaier#endif /* NPFSYNC */ 6988126258Smlaier r = s->rule.ptr; 6989130613Smlaier a = s->anchor.ptr; 6990126258Smlaier log = s->log; 6991126258Smlaier } else if (s == NULL) 6992145836Smlaier#ifdef __FreeBSD__ 6993130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6994145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 6995145836Smlaier#else 6996145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6997145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6998145836Smlaier#endif 6999126258Smlaier break; 7000126258Smlaier } 7001126258Smlaier 7002126258Smlaier default: 7003130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 7004130613Smlaier if (action == PF_PASS) { 7005145836Smlaier#if NPFSYNC 7006145836Smlaier pfsync_update_state(s); 7007145836Smlaier#endif /* NPFSYNC */ 7008130613Smlaier r = s->rule.ptr; 7009130613Smlaier a = s->anchor.ptr; 7010130613Smlaier log = s->log; 7011130613Smlaier } else if (s == NULL) 7012145836Smlaier#ifdef __FreeBSD__ 7013130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7014145836Smlaier &pd, &a, &ruleset, NULL); 7015145836Smlaier#else 7016145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 7017145836Smlaier &pd, &a, &ruleset, &ip6intrq); 7018145836Smlaier#endif 7019126258Smlaier break; 7020126258Smlaier } 7021126258Smlaier 7022126258Smlaierdone: 7023126258Smlaier /* XXX handle IPv6 options, if not allowed. not implemented. */ 7024126258Smlaier 7025145836Smlaier if (s && s->tag) 7026145836Smlaier pf_tag_packet(m, pf_get_tag(m), s->tag); 7027145836Smlaier 7028126258Smlaier#ifdef ALTQ 7029126258Smlaier if (action == PF_PASS && r->qid) { 7030126258Smlaier struct m_tag *mtag; 7031126258Smlaier struct altq_tag *atag; 7032126258Smlaier 7033126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 7034126258Smlaier if (mtag != NULL) { 7035126258Smlaier atag = (struct altq_tag *)(mtag + 1); 7036126258Smlaier if (pd.tos == IPTOS_LOWDELAY) 7037126258Smlaier atag->qid = r->pqid; 7038126258Smlaier else 7039126258Smlaier atag->qid = r->qid; 7040126258Smlaier /* add hints for ecn */ 7041126258Smlaier atag->af = AF_INET6; 7042126258Smlaier atag->hdr = h; 7043126258Smlaier m_tag_prepend(m, mtag); 7044126258Smlaier } 7045126258Smlaier } 7046145836Smlaier#endif /* ALTQ */ 7047126258Smlaier 7048130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 7049130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 7050130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 7051130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 7052130613Smlaier IN6_IS_ADDR_LOOPBACK(&pd.dst->v6) && 7053130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 7054130613Smlaier action = PF_DROP; 7055130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 7056130613Smlaier } 7057130613Smlaier 7058126258Smlaier if (log) 7059130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET6, dir, reason, r, a, ruleset); 7060126258Smlaier 7061130613Smlaier kif->pfik_bytes[1][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 7062130613Smlaier kif->pfik_packets[1][dir == PF_OUT][action != PF_PASS]++; 7063130613Smlaier 7064130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 7065130613Smlaier r->packets++; 7066130613Smlaier r->bytes += pd.tot_len; 7067130613Smlaier if (a != NULL) { 7068130613Smlaier a->packets++; 7069130613Smlaier a->bytes += pd.tot_len; 7070130613Smlaier } 7071130613Smlaier if (s != NULL) { 7072130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 7073130613Smlaier s->packets[dirndx]++; 7074130613Smlaier s->bytes[dirndx] += pd.tot_len; 7075130613Smlaier if (s->nat_rule.ptr != NULL) { 7076130613Smlaier s->nat_rule.ptr->packets++; 7077130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 7078130613Smlaier } 7079130613Smlaier if (s->src_node != NULL) { 7080130613Smlaier s->src_node->packets++; 7081130613Smlaier s->src_node->bytes += pd.tot_len; 7082130613Smlaier } 7083130613Smlaier if (s->nat_src_node != NULL) { 7084130613Smlaier s->nat_src_node->packets++; 7085130613Smlaier s->nat_src_node->bytes += pd.tot_len; 7086130613Smlaier } 7087130613Smlaier } 7088130613Smlaier tr = r; 7089130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 7090130613Smlaier if (nr != NULL) { 7091130613Smlaier struct pf_addr *x; 7092130613Smlaier /* 7093130613Smlaier * XXX: we need to make sure that the addresses 7094130613Smlaier * passed to pfr_update_stats() are the same than 7095130613Smlaier * the addresses used during matching (pfr_match) 7096130613Smlaier */ 7097130613Smlaier if (r == &pf_default_rule) { 7098130613Smlaier tr = nr; 7099130613Smlaier x = (s == NULL || s->direction == dir) ? 7100130613Smlaier &pd.baddr : &pd.naddr; 7101130613Smlaier } else { 7102130613Smlaier x = (s == NULL || s->direction == dir) ? 7103130613Smlaier &pd.naddr : &pd.baddr; 7104130613Smlaier } 7105130613Smlaier if (x == &pd.baddr || s == NULL) { 7106130613Smlaier if (dir == PF_OUT) 7107130613Smlaier pd.src = x; 7108130613Smlaier else 7109130613Smlaier pd.dst = x; 7110130613Smlaier } 7111130613Smlaier } 7112130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 7113130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 7114130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 7115130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7116145836Smlaier tr->src.neg); 7117130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 7118130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 7119130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 7120130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 7121145836Smlaier tr->dst.neg); 7122130613Smlaier } 7123130613Smlaier 7124130613Smlaier 7125126258Smlaier if (action == PF_SYNPROXY_DROP) { 7126126258Smlaier m_freem(*m0); 7127126258Smlaier *m0 = NULL; 7128126258Smlaier action = PF_PASS; 7129126258Smlaier } else if (r->rt) 7130126258Smlaier /* pf_route6 can free the mbuf causing *m0 to become NULL */ 7131126258Smlaier pf_route6(m0, r, dir, ifp, s); 7132126258Smlaier 7133127145Smlaier#ifdef __FreeBSD__ 7134126261Smlaier PF_UNLOCK(); 7135126261Smlaier#endif 7136126258Smlaier return (action); 7137126258Smlaier} 7138126258Smlaier#endif /* INET6 */ 7139145836Smlaier 7140145836Smlaierint 7141145836Smlaierpf_check_congestion(struct ifqueue *ifq) 7142145836Smlaier{ 7143145836Smlaier#ifdef __FreeBSD__ 7144145836Smlaier /* XXX_IMPORT: later */ 7145145836Smlaier return (0); 7146145836Smlaier#else 7147145836Smlaier if (ifq->ifq_congestion) 7148145836Smlaier return (1); 7149145836Smlaier else 7150145836Smlaier return (0); 7151145836Smlaier#endif 7152145836Smlaier} 7153