pf.c revision 145886
1126261Smlaier/* $FreeBSD: head/sys/contrib/pf/net/pf.c 145886 2005-05-04 19:51:06Z mlaier $ */ 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__ 45126261Smlaier#include "opt_bpf.h" 46126261Smlaier#include "opt_pf.h" 47127145Smlaier#define NBPFILTER DEV_BPF 48127145Smlaier#define NPFLOG DEV_PFLOG 49127145Smlaier#define NPFSYNC DEV_PFSYNC 50126261Smlaier#else 51126258Smlaier#include "bpfilter.h" 52126258Smlaier#include "pflog.h" 53126258Smlaier#include "pfsync.h" 54126261Smlaier#endif 55126258Smlaier 56126258Smlaier#include <sys/param.h> 57126258Smlaier#include <sys/systm.h> 58126258Smlaier#include <sys/mbuf.h> 59126258Smlaier#include <sys/filio.h> 60126258Smlaier#include <sys/socket.h> 61126258Smlaier#include <sys/socketvar.h> 62126258Smlaier#include <sys/kernel.h> 63126258Smlaier#include <sys/time.h> 64127145Smlaier#ifdef __FreeBSD__ 65126261Smlaier#include <sys/sysctl.h> 66130613Smlaier#include <sys/endian.h> 67126261Smlaier#else 68126258Smlaier#include <sys/pool.h> 69126261Smlaier#endif 70126258Smlaier 71126258Smlaier#include <net/if.h> 72126258Smlaier#include <net/if_types.h> 73126258Smlaier#include <net/bpf.h> 74126258Smlaier#include <net/route.h> 75126258Smlaier 76126258Smlaier#include <netinet/in.h> 77126258Smlaier#include <netinet/in_var.h> 78126258Smlaier#include <netinet/in_systm.h> 79126258Smlaier#include <netinet/ip.h> 80126258Smlaier#include <netinet/ip_var.h> 81126258Smlaier#include <netinet/tcp.h> 82126258Smlaier#include <netinet/tcp_seq.h> 83126258Smlaier#include <netinet/udp.h> 84126258Smlaier#include <netinet/ip_icmp.h> 85126258Smlaier#include <netinet/in_pcb.h> 86126258Smlaier#include <netinet/tcp_timer.h> 87126258Smlaier#include <netinet/tcp_var.h> 88126258Smlaier#include <netinet/udp_var.h> 89126258Smlaier#include <netinet/icmp_var.h> 90145836Smlaier#include <netinet/if_ether.h> 91126258Smlaier 92127145Smlaier#ifndef __FreeBSD__ 93126258Smlaier#include <dev/rndvar.h> 94126261Smlaier#endif 95126258Smlaier#include <net/pfvar.h> 96126258Smlaier#include <net/if_pflog.h> 97130613Smlaier 98130613Smlaier#if NPFSYNC > 0 99126258Smlaier#include <net/if_pfsync.h> 100130613Smlaier#endif /* NPFSYNC > 0 */ 101126258Smlaier 102126258Smlaier#ifdef INET6 103126258Smlaier#include <netinet/ip6.h> 104126258Smlaier#include <netinet/in_pcb.h> 105126258Smlaier#include <netinet/icmp6.h> 106126258Smlaier#include <netinet6/nd6.h> 107127145Smlaier#ifdef __FreeBSD__ 108126261Smlaier#include <netinet6/ip6_var.h> 109126261Smlaier#include <netinet6/in6_pcb.h> 110126261Smlaier#endif 111126258Smlaier#endif /* INET6 */ 112126258Smlaier 113127145Smlaier#ifdef __FreeBSD__ 114126261Smlaier#include <machine/in_cksum.h> 115126261Smlaier#include <sys/limits.h> 116126261Smlaier#include <sys/ucred.h> 117126258Smlaier 118126261Smlaierextern int ip_optcopy(struct ip *, struct ip *); 119126261Smlaier#endif 120126261Smlaier 121126258Smlaier#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x 122126258Smlaier 123126258Smlaier/* 124126258Smlaier * Global variables 125126258Smlaier */ 126126258Smlaier 127145836Smlaierstruct pf_anchor_global pf_anchors; 128126258Smlaierstruct pf_ruleset pf_main_ruleset; 129126258Smlaierstruct pf_altqqueue pf_altqs[2]; 130126258Smlaierstruct pf_palist pf_pabuf; 131126258Smlaierstruct pf_altqqueue *pf_altqs_active; 132126258Smlaierstruct pf_altqqueue *pf_altqs_inactive; 133126258Smlaierstruct pf_status pf_status; 134126258Smlaier 135126258Smlaieru_int32_t ticket_altqs_active; 136126258Smlaieru_int32_t ticket_altqs_inactive; 137130613Smlaierint altqs_inactive_open; 138126258Smlaieru_int32_t ticket_pabuf; 139126258Smlaier 140127145Smlaier#ifdef __FreeBSD__ 141126261Smlaierstruct callout pf_expire_to; /* expire timeout */ 142126261Smlaier#else 143126258Smlaierstruct timeout pf_expire_to; /* expire timeout */ 144126261Smlaier#endif 145126258Smlaier 146145836Smlaierstruct pf_anchor_stackframe { 147145836Smlaier struct pf_ruleset *rs; 148145836Smlaier struct pf_rule *r; 149145836Smlaier struct pf_anchor_node *parent; 150145836Smlaier struct pf_anchor *child; 151145836Smlaier} pf_anchor_stack[64]; 152126261Smlaier 153127145Smlaier#ifdef __FreeBSD__ 154130613Smlaieruma_zone_t pf_src_tree_pl, pf_rule_pl; 155126261Smlaieruma_zone_t pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 156126261Smlaier#else 157130613Smlaierstruct pool pf_src_tree_pl, pf_rule_pl; 158126258Smlaierstruct pool pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 159126261Smlaier#endif 160126258Smlaier 161126258Smlaiervoid pf_print_host(struct pf_addr *, u_int16_t, u_int8_t); 162126258Smlaier 163145836Smlaiervoid pf_init_threshold(struct pf_threshold *, u_int32_t, 164145836Smlaier u_int32_t); 165145836Smlaiervoid pf_add_threshold(struct pf_threshold *); 166145836Smlaierint pf_check_threshold(struct pf_threshold *); 167145836Smlaier 168126258Smlaiervoid pf_change_ap(struct pf_addr *, u_int16_t *, 169126258Smlaier u_int16_t *, u_int16_t *, struct pf_addr *, 170126258Smlaier u_int16_t, u_int8_t, sa_family_t); 171126258Smlaier#ifdef INET6 172126258Smlaiervoid pf_change_a6(struct pf_addr *, u_int16_t *, 173126258Smlaier struct pf_addr *, u_int8_t); 174126258Smlaier#endif /* INET6 */ 175126258Smlaiervoid pf_change_icmp(struct pf_addr *, u_int16_t *, 176126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 177126258Smlaier u_int16_t *, u_int16_t *, u_int16_t *, 178126258Smlaier u_int16_t *, u_int8_t, sa_family_t); 179126258Smlaiervoid pf_send_tcp(const struct pf_rule *, sa_family_t, 180126258Smlaier const struct pf_addr *, const struct pf_addr *, 181126258Smlaier u_int16_t, u_int16_t, u_int32_t, u_int32_t, 182145836Smlaier u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 183145836Smlaier struct ether_header *, struct ifnet *); 184126258Smlaiervoid pf_send_icmp(struct mbuf *, u_int8_t, u_int8_t, 185126258Smlaier sa_family_t, struct pf_rule *); 186126258Smlaierstruct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *, 187130613Smlaier int, int, struct pfi_kif *, 188126258Smlaier struct pf_addr *, u_int16_t, struct pf_addr *, 189126258Smlaier u_int16_t, int); 190126258Smlaierstruct pf_rule *pf_get_translation(struct pf_pdesc *, struct mbuf *, 191130613Smlaier int, int, struct pfi_kif *, struct pf_src_node **, 192126258Smlaier struct pf_addr *, u_int16_t, 193126258Smlaier struct pf_addr *, u_int16_t, 194126258Smlaier struct pf_addr *, u_int16_t *); 195126258Smlaierint pf_test_tcp(struct pf_rule **, struct pf_state **, 196130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 197126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 198135920Smlaier#ifdef __FreeBSD__ 199145836Smlaier struct pf_ruleset **, struct ifqueue *, 200145836Smlaier struct inpcb *); 201135920Smlaier#else 202145836Smlaier struct pf_ruleset **, struct ifqueue *); 203135920Smlaier#endif 204126258Smlaierint pf_test_udp(struct pf_rule **, struct pf_state **, 205130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 206126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 207135920Smlaier#ifdef __FreeBSD__ 208145836Smlaier struct pf_ruleset **, struct ifqueue *, 209145836Smlaier struct inpcb *); 210135920Smlaier#else 211145836Smlaier struct pf_ruleset **, struct ifqueue *); 212135920Smlaier#endif 213126258Smlaierint pf_test_icmp(struct pf_rule **, struct pf_state **, 214130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 215126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 216145836Smlaier struct pf_ruleset **, struct ifqueue *); 217126258Smlaierint pf_test_other(struct pf_rule **, struct pf_state **, 218130613Smlaier int, struct pfi_kif *, struct mbuf *, int, void *, 219126258Smlaier struct pf_pdesc *, struct pf_rule **, 220145836Smlaier struct pf_ruleset **, struct ifqueue *); 221126258Smlaierint pf_test_fragment(struct pf_rule **, int, 222130613Smlaier struct pfi_kif *, struct mbuf *, void *, 223126258Smlaier struct pf_pdesc *, struct pf_rule **, 224126258Smlaier struct pf_ruleset **); 225126258Smlaierint pf_test_state_tcp(struct pf_state **, int, 226130613Smlaier struct pfi_kif *, struct mbuf *, int, 227126258Smlaier void *, struct pf_pdesc *, u_short *); 228126258Smlaierint pf_test_state_udp(struct pf_state **, int, 229130613Smlaier struct pfi_kif *, struct mbuf *, int, 230126258Smlaier void *, struct pf_pdesc *); 231126258Smlaierint pf_test_state_icmp(struct pf_state **, int, 232130613Smlaier struct pfi_kif *, struct mbuf *, int, 233145836Smlaier void *, struct pf_pdesc *, u_short *); 234126258Smlaierint pf_test_state_other(struct pf_state **, int, 235130613Smlaier struct pfi_kif *, struct pf_pdesc *); 236126258Smlaierstruct pf_tag *pf_get_tag(struct mbuf *); 237126258Smlaierint pf_match_tag(struct mbuf *, struct pf_rule *, 238145836Smlaier struct pf_tag **, int *); 239126258Smlaiervoid pf_hash(struct pf_addr *, struct pf_addr *, 240126258Smlaier struct pf_poolhashkey *, sa_family_t); 241130613Smlaierint pf_map_addr(u_int8_t, struct pf_rule *, 242126258Smlaier struct pf_addr *, struct pf_addr *, 243130613Smlaier struct pf_addr *, struct pf_src_node **); 244130613Smlaierint pf_get_sport(sa_family_t, u_int8_t, struct pf_rule *, 245126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 246130613Smlaier struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t, 247130613Smlaier struct pf_src_node **); 248126258Smlaiervoid pf_route(struct mbuf **, struct pf_rule *, int, 249126258Smlaier struct ifnet *, struct pf_state *); 250126258Smlaiervoid pf_route6(struct mbuf **, struct pf_rule *, int, 251126258Smlaier struct ifnet *, struct pf_state *); 252135920Smlaier#ifdef __FreeBSD__ 253130613Smlaierint pf_socket_lookup(uid_t *, gid_t *, 254135920Smlaier int, struct pf_pdesc *, struct inpcb *); 255135920Smlaier#else 256135920Smlaierint pf_socket_lookup(uid_t *, gid_t *, 257126258Smlaier int, struct pf_pdesc *); 258135920Smlaier#endif 259126258Smlaieru_int8_t pf_get_wscale(struct mbuf *, int, u_int16_t, 260126258Smlaier sa_family_t); 261126258Smlaieru_int16_t pf_get_mss(struct mbuf *, int, u_int16_t, 262126258Smlaier sa_family_t); 263126258Smlaieru_int16_t pf_calc_mss(struct pf_addr *, sa_family_t, 264126258Smlaier u_int16_t); 265126258Smlaiervoid pf_set_rt_ifp(struct pf_state *, 266126258Smlaier struct pf_addr *); 267126258Smlaierint pf_check_proto_cksum(struct mbuf *, int, int, 268126258Smlaier u_int8_t, sa_family_t); 269126258Smlaierint pf_addr_wrap_neq(struct pf_addr_wrap *, 270126258Smlaier struct pf_addr_wrap *); 271130613Smlaierstatic int pf_add_mbuf_tag(struct mbuf *, u_int); 272130613Smlaierstruct pf_state *pf_find_state_recurse(struct pfi_kif *, 273130613Smlaier struct pf_state *, u_int8_t); 274145836Smlaierint pf_src_connlimit(struct pf_state **); 275145836Smlaierint pf_check_congestion(struct ifqueue *); 276126258Smlaier 277127145Smlaier#ifdef __FreeBSD__ 278126261Smlaierint in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len); 279126258Smlaier 280126261Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 281145836Smlaier 282126261Smlaier#else 283130613Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX] = { 284130613Smlaier { &pf_state_pl, PFSTATE_HIWAT }, 285130613Smlaier { &pf_src_tree_pl, PFSNODE_HIWAT }, 286130613Smlaier { &pf_frent_pl, PFFRAG_FRENT_HIWAT } 287130613Smlaier}; 288126261Smlaier#endif 289126258Smlaier 290126258Smlaier#define STATE_LOOKUP() \ 291126258Smlaier do { \ 292126258Smlaier if (direction == PF_IN) \ 293145836Smlaier *state = pf_find_state_recurse( \ 294130613Smlaier kif, &key, PF_EXT_GWY); \ 295126258Smlaier else \ 296145836Smlaier *state = pf_find_state_recurse( \ 297130613Smlaier kif, &key, PF_LAN_EXT); \ 298145836Smlaier if (*state == NULL || (*state)->timeout == PFTM_PURGE) \ 299126258Smlaier return (PF_DROP); \ 300126258Smlaier if (direction == PF_OUT && \ 301126258Smlaier (((*state)->rule.ptr->rt == PF_ROUTETO && \ 302126258Smlaier (*state)->rule.ptr->direction == PF_OUT) || \ 303126258Smlaier ((*state)->rule.ptr->rt == PF_REPLYTO && \ 304126258Smlaier (*state)->rule.ptr->direction == PF_IN)) && \ 305130613Smlaier (*state)->rt_kif != NULL && \ 306130613Smlaier (*state)->rt_kif != kif) \ 307126258Smlaier return (PF_PASS); \ 308126258Smlaier } while (0) 309126258Smlaier 310126258Smlaier#define STATE_TRANSLATE(s) \ 311126258Smlaier (s)->lan.addr.addr32[0] != (s)->gwy.addr.addr32[0] || \ 312126258Smlaier ((s)->af == AF_INET6 && \ 313126258Smlaier ((s)->lan.addr.addr32[1] != (s)->gwy.addr.addr32[1] || \ 314126258Smlaier (s)->lan.addr.addr32[2] != (s)->gwy.addr.addr32[2] || \ 315126258Smlaier (s)->lan.addr.addr32[3] != (s)->gwy.addr.addr32[3])) || \ 316126258Smlaier (s)->lan.port != (s)->gwy.port 317126258Smlaier 318130613Smlaier#define BOUND_IFACE(r, k) (((r)->rule_flag & PFRULE_IFBOUND) ? (k) : \ 319130613Smlaier ((r)->rule_flag & PFRULE_GRBOUND) ? (k)->pfik_parent : \ 320130613Smlaier (k)->pfik_parent->pfik_parent) 321126258Smlaier 322145836Smlaier#define STATE_INC_COUNTERS(s) \ 323145836Smlaier do { \ 324145836Smlaier s->rule.ptr->states++; \ 325145836Smlaier if (s->anchor.ptr != NULL) \ 326145836Smlaier s->anchor.ptr->states++; \ 327145836Smlaier if (s->nat_rule.ptr != NULL) \ 328145836Smlaier s->nat_rule.ptr->states++; \ 329145836Smlaier } while (0) 330145836Smlaier 331145836Smlaier#define STATE_DEC_COUNTERS(s) \ 332145836Smlaier do { \ 333145836Smlaier if (s->nat_rule.ptr != NULL) \ 334145836Smlaier s->nat_rule.ptr->states--; \ 335145836Smlaier if (s->anchor.ptr != NULL) \ 336145836Smlaier s->anchor.ptr->states--; \ 337145836Smlaier s->rule.ptr->states--; \ 338145836Smlaier } while (0) 339145836Smlaier 340132767Skan#ifndef __FreeBSD__ 341130613Smlaierstatic __inline int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 342130613Smlaierstatic __inline int pf_state_compare_lan_ext(struct pf_state *, 343130613Smlaier struct pf_state *); 344130613Smlaierstatic __inline int pf_state_compare_ext_gwy(struct pf_state *, 345130613Smlaier struct pf_state *); 346130613Smlaierstatic __inline int pf_state_compare_id(struct pf_state *, 347130613Smlaier struct pf_state *); 348145836Smlaierstatic __inline int pf_anchor_compare(struct pf_anchor *, struct pf_anchor *); 349132767Skan#else 350132767Skanstatic int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 351132767Skanstatic int pf_state_compare_lan_ext(struct pf_state *, 352132767Skan struct pf_state *); 353132767Skanstatic int pf_state_compare_ext_gwy(struct pf_state *, 354132767Skan struct pf_state *); 355132767Skanstatic int pf_state_compare_id(struct pf_state *, 356132767Skan struct pf_state *); 357145836Smlaierstatic int pf_anchor_compare(struct pf_anchor *, struct pf_anchor *); 358132767Skan#endif 359126258Smlaier 360130613Smlaierstruct pf_src_tree tree_src_tracking; 361130613Smlaier 362130613Smlaierstruct pf_state_tree_id tree_id; 363130613Smlaierstruct pf_state_queue state_updates; 364130613Smlaier 365130613SmlaierRB_GENERATE(pf_src_tree, pf_src_node, entry, pf_src_compare); 366130613SmlaierRB_GENERATE(pf_state_tree_lan_ext, pf_state, 367130613Smlaier u.s.entry_lan_ext, pf_state_compare_lan_ext); 368130613SmlaierRB_GENERATE(pf_state_tree_ext_gwy, pf_state, 369130613Smlaier u.s.entry_ext_gwy, pf_state_compare_ext_gwy); 370130613SmlaierRB_GENERATE(pf_state_tree_id, pf_state, 371130613Smlaier u.s.entry_id, pf_state_compare_id); 372145836SmlaierRB_GENERATE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 373145836SmlaierRB_GENERATE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 374130613Smlaier 375127145Smlaier#ifdef __FreeBSD__ 376126409Smlaierstatic int 377126409Smlaier#else 378126258Smlaierstatic __inline int 379126409Smlaier#endif 380130613Smlaierpf_src_compare(struct pf_src_node *a, struct pf_src_node *b) 381126258Smlaier{ 382126258Smlaier int diff; 383126258Smlaier 384130613Smlaier if (a->rule.ptr > b->rule.ptr) 385130613Smlaier return (1); 386130613Smlaier if (a->rule.ptr < b->rule.ptr) 387130613Smlaier return (-1); 388130613Smlaier if ((diff = a->af - b->af) != 0) 389130613Smlaier return (diff); 390130613Smlaier switch (a->af) { 391130613Smlaier#ifdef INET 392130613Smlaier case AF_INET: 393130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 394130613Smlaier return (1); 395130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 396130613Smlaier return (-1); 397130613Smlaier break; 398130613Smlaier#endif /* INET */ 399130613Smlaier#ifdef INET6 400130613Smlaier case AF_INET6: 401130613Smlaier if (a->addr.addr32[3] > b->addr.addr32[3]) 402130613Smlaier return (1); 403130613Smlaier if (a->addr.addr32[3] < b->addr.addr32[3]) 404130613Smlaier return (-1); 405130613Smlaier if (a->addr.addr32[2] > b->addr.addr32[2]) 406130613Smlaier return (1); 407130613Smlaier if (a->addr.addr32[2] < b->addr.addr32[2]) 408130613Smlaier return (-1); 409130613Smlaier if (a->addr.addr32[1] > b->addr.addr32[1]) 410130613Smlaier return (1); 411130613Smlaier if (a->addr.addr32[1] < b->addr.addr32[1]) 412130613Smlaier return (-1); 413130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 414130613Smlaier return (1); 415130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 416130613Smlaier return (-1); 417130613Smlaier break; 418130613Smlaier#endif /* INET6 */ 419130613Smlaier } 420130613Smlaier return (0); 421130613Smlaier} 422130613Smlaier 423130613Smlaier#ifdef __FreeBSD__ 424130613Smlaierstatic int 425130613Smlaier#else 426130613Smlaierstatic __inline int 427130613Smlaier#endif 428130613Smlaierpf_state_compare_lan_ext(struct pf_state *a, struct pf_state *b) 429130613Smlaier{ 430130613Smlaier int diff; 431130613Smlaier 432126258Smlaier if ((diff = a->proto - b->proto) != 0) 433126258Smlaier return (diff); 434126258Smlaier if ((diff = a->af - b->af) != 0) 435126258Smlaier return (diff); 436126258Smlaier switch (a->af) { 437126258Smlaier#ifdef INET 438126258Smlaier case AF_INET: 439130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 440126258Smlaier return (1); 441130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 442126258Smlaier return (-1); 443130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 444126258Smlaier return (1); 445130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 446126258Smlaier return (-1); 447126258Smlaier break; 448126258Smlaier#endif /* INET */ 449126258Smlaier#ifdef INET6 450126258Smlaier case AF_INET6: 451130613Smlaier if (a->lan.addr.addr32[3] > b->lan.addr.addr32[3]) 452126258Smlaier return (1); 453130613Smlaier if (a->lan.addr.addr32[3] < b->lan.addr.addr32[3]) 454126258Smlaier return (-1); 455130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 456126258Smlaier return (1); 457130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 458126258Smlaier return (-1); 459130613Smlaier if (a->lan.addr.addr32[2] > b->lan.addr.addr32[2]) 460126258Smlaier return (1); 461130613Smlaier if (a->lan.addr.addr32[2] < b->lan.addr.addr32[2]) 462126258Smlaier return (-1); 463130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 464126258Smlaier return (1); 465130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 466126258Smlaier return (-1); 467130613Smlaier if (a->lan.addr.addr32[1] > b->lan.addr.addr32[1]) 468126258Smlaier return (1); 469130613Smlaier if (a->lan.addr.addr32[1] < b->lan.addr.addr32[1]) 470126258Smlaier return (-1); 471130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 472126258Smlaier return (1); 473130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 474126258Smlaier return (-1); 475130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 476126258Smlaier return (1); 477130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 478126258Smlaier return (-1); 479130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 480126258Smlaier return (1); 481130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 482126258Smlaier return (-1); 483126258Smlaier break; 484126258Smlaier#endif /* INET6 */ 485126258Smlaier } 486126258Smlaier 487130613Smlaier if ((diff = a->lan.port - b->lan.port) != 0) 488126258Smlaier return (diff); 489130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 490126258Smlaier return (diff); 491126258Smlaier 492126258Smlaier return (0); 493126258Smlaier} 494126258Smlaier 495130613Smlaier#ifdef __FreeBSD__ 496130613Smlaierstatic int 497130613Smlaier#else 498130613Smlaierstatic __inline int 499130613Smlaier#endif 500130613Smlaierpf_state_compare_ext_gwy(struct pf_state *a, struct pf_state *b) 501130613Smlaier{ 502130613Smlaier int diff; 503130613Smlaier 504130613Smlaier if ((diff = a->proto - b->proto) != 0) 505130613Smlaier return (diff); 506130613Smlaier if ((diff = a->af - b->af) != 0) 507130613Smlaier return (diff); 508130613Smlaier switch (a->af) { 509130613Smlaier#ifdef INET 510130613Smlaier case AF_INET: 511130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 512130613Smlaier return (1); 513130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 514130613Smlaier return (-1); 515130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 516130613Smlaier return (1); 517130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 518130613Smlaier return (-1); 519130613Smlaier break; 520130613Smlaier#endif /* INET */ 521126258Smlaier#ifdef INET6 522130613Smlaier case AF_INET6: 523130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 524130613Smlaier return (1); 525130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 526130613Smlaier return (-1); 527130613Smlaier if (a->gwy.addr.addr32[3] > b->gwy.addr.addr32[3]) 528130613Smlaier return (1); 529130613Smlaier if (a->gwy.addr.addr32[3] < b->gwy.addr.addr32[3]) 530130613Smlaier return (-1); 531130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 532130613Smlaier return (1); 533130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 534130613Smlaier return (-1); 535130613Smlaier if (a->gwy.addr.addr32[2] > b->gwy.addr.addr32[2]) 536130613Smlaier return (1); 537130613Smlaier if (a->gwy.addr.addr32[2] < b->gwy.addr.addr32[2]) 538130613Smlaier return (-1); 539130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 540130613Smlaier return (1); 541130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 542130613Smlaier return (-1); 543130613Smlaier if (a->gwy.addr.addr32[1] > b->gwy.addr.addr32[1]) 544130613Smlaier return (1); 545130613Smlaier if (a->gwy.addr.addr32[1] < b->gwy.addr.addr32[1]) 546130613Smlaier return (-1); 547130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 548130613Smlaier return (1); 549130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 550130613Smlaier return (-1); 551130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 552130613Smlaier return (1); 553130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 554130613Smlaier return (-1); 555130613Smlaier break; 556130613Smlaier#endif /* INET6 */ 557130613Smlaier } 558130613Smlaier 559130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 560130613Smlaier return (diff); 561130613Smlaier if ((diff = a->gwy.port - b->gwy.port) != 0) 562130613Smlaier return (diff); 563130613Smlaier 564130613Smlaier return (0); 565130613Smlaier} 566130613Smlaier 567130613Smlaier#ifdef __FreeBSD__ 568130613Smlaierstatic int 569130613Smlaier#else 570130613Smlaierstatic __inline int 571130613Smlaier#endif 572130613Smlaierpf_state_compare_id(struct pf_state *a, struct pf_state *b) 573130613Smlaier{ 574130613Smlaier if (a->id > b->id) 575130613Smlaier return (1); 576130613Smlaier if (a->id < b->id) 577130613Smlaier return (-1); 578130613Smlaier if (a->creatorid > b->creatorid) 579130613Smlaier return (1); 580130613Smlaier if (a->creatorid < b->creatorid) 581130613Smlaier return (-1); 582130613Smlaier 583130613Smlaier return (0); 584130613Smlaier} 585130613Smlaier 586145836Smlaier#ifdef __FreeBSD__ 587145836Smlaierstatic int 588145836Smlaier#else 589145836Smlaierstatic __inline int 590145836Smlaier#endif 591145836Smlaierpf_anchor_compare(struct pf_anchor *a, struct pf_anchor *b) 592145836Smlaier{ 593145836Smlaier int c = strcmp(a->path, b->path); 594145836Smlaier 595145836Smlaier return (c ? (c < 0 ? -1 : 1) : 0); 596145836Smlaier} 597145836Smlaier 598130613Smlaier#ifdef INET6 599126258Smlaiervoid 600126258Smlaierpf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af) 601126258Smlaier{ 602126258Smlaier switch (af) { 603126258Smlaier#ifdef INET 604126258Smlaier case AF_INET: 605126258Smlaier dst->addr32[0] = src->addr32[0]; 606126258Smlaier break; 607126258Smlaier#endif /* INET */ 608126258Smlaier case AF_INET6: 609126258Smlaier dst->addr32[0] = src->addr32[0]; 610126258Smlaier dst->addr32[1] = src->addr32[1]; 611126258Smlaier dst->addr32[2] = src->addr32[2]; 612126258Smlaier dst->addr32[3] = src->addr32[3]; 613126258Smlaier break; 614126258Smlaier } 615126258Smlaier} 616145836Smlaier#endif /* INET6 */ 617126258Smlaier 618126258Smlaierstruct pf_state * 619130613Smlaierpf_find_state_byid(struct pf_state *key) 620126258Smlaier{ 621130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 622130613Smlaier return (RB_FIND(pf_state_tree_id, &tree_id, key)); 623130613Smlaier} 624126258Smlaier 625130613Smlaierstruct pf_state * 626130613Smlaierpf_find_state_recurse(struct pfi_kif *kif, struct pf_state *key, u_int8_t tree) 627130613Smlaier{ 628130613Smlaier struct pf_state *s; 629130613Smlaier 630126258Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 631130613Smlaier 632130613Smlaier switch (tree) { 633130613Smlaier case PF_LAN_EXT: 634130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 635130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 636130613Smlaier &kif->pfik_lan_ext, key); 637130613Smlaier if (s != NULL) 638130613Smlaier return (s); 639130613Smlaier } 640126258Smlaier return (NULL); 641130613Smlaier case PF_EXT_GWY: 642130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 643130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 644130613Smlaier &kif->pfik_ext_gwy, key); 645130613Smlaier if (s != NULL) 646130613Smlaier return (s); 647130613Smlaier } 648130613Smlaier return (NULL); 649130613Smlaier default: 650130613Smlaier panic("pf_find_state_recurse"); 651130613Smlaier } 652126258Smlaier} 653126258Smlaier 654130613Smlaierstruct pf_state * 655130613Smlaierpf_find_state_all(struct pf_state *key, u_int8_t tree, int *more) 656130613Smlaier{ 657130613Smlaier struct pf_state *s, *ss = NULL; 658130613Smlaier struct pfi_kif *kif; 659130613Smlaier 660130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 661130613Smlaier 662130613Smlaier switch (tree) { 663130613Smlaier case PF_LAN_EXT: 664130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 665130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 666130613Smlaier &kif->pfik_lan_ext, key); 667130613Smlaier if (s == NULL) 668130613Smlaier continue; 669130613Smlaier if (more == NULL) 670130613Smlaier return (s); 671130613Smlaier ss = s; 672130613Smlaier (*more)++; 673130613Smlaier } 674130613Smlaier return (ss); 675130613Smlaier case PF_EXT_GWY: 676130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 677130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 678130613Smlaier &kif->pfik_ext_gwy, key); 679130613Smlaier if (s == NULL) 680130613Smlaier continue; 681130613Smlaier if (more == NULL) 682130613Smlaier return (s); 683130613Smlaier ss = s; 684130613Smlaier (*more)++; 685130613Smlaier } 686130613Smlaier return (ss); 687130613Smlaier default: 688130613Smlaier panic("pf_find_state_all"); 689130613Smlaier } 690130613Smlaier} 691130613Smlaier 692145836Smlaiervoid 693145836Smlaierpf_init_threshold(struct pf_threshold *threshold, 694145836Smlaier u_int32_t limit, u_int32_t seconds) 695145836Smlaier{ 696145836Smlaier threshold->limit = limit * PF_THRESHOLD_MULT; 697145836Smlaier threshold->seconds = seconds; 698145836Smlaier threshold->count = 0; 699145836Smlaier threshold->last = time_second; 700145836Smlaier} 701145836Smlaier 702145836Smlaiervoid 703145836Smlaierpf_add_threshold(struct pf_threshold *threshold) 704145836Smlaier{ 705145836Smlaier u_int32_t t = time_second, diff = t - threshold->last; 706145836Smlaier 707145836Smlaier if (diff >= threshold->seconds) 708145836Smlaier threshold->count = 0; 709145836Smlaier else 710145836Smlaier threshold->count -= threshold->count * diff / 711145836Smlaier threshold->seconds; 712145836Smlaier threshold->count += PF_THRESHOLD_MULT; 713145836Smlaier threshold->last = t; 714145836Smlaier} 715145836Smlaier 716126258Smlaierint 717145836Smlaierpf_check_threshold(struct pf_threshold *threshold) 718145836Smlaier{ 719145836Smlaier return (threshold->count > threshold->limit); 720145836Smlaier} 721145836Smlaier 722145836Smlaierint 723145836Smlaierpf_src_connlimit(struct pf_state **state) 724145836Smlaier{ 725145836Smlaier struct pf_state *s; 726145836Smlaier int bad = 0; 727145836Smlaier 728145836Smlaier (*state)->src_node->conn++; 729145836Smlaier pf_add_threshold(&(*state)->src_node->conn_rate); 730145836Smlaier 731145836Smlaier if ((*state)->rule.ptr->max_src_conn && 732145836Smlaier (*state)->rule.ptr->max_src_conn < 733145836Smlaier (*state)->src_node->conn) { 734145836Smlaier pf_status.lcounters[LCNT_SRCCONN]++; 735145836Smlaier bad++; 736145836Smlaier } 737145836Smlaier 738145836Smlaier if ((*state)->rule.ptr->max_src_conn_rate.limit && 739145836Smlaier pf_check_threshold(&(*state)->src_node->conn_rate)) { 740145836Smlaier pf_status.lcounters[LCNT_SRCCONNRATE]++; 741145836Smlaier bad++; 742145836Smlaier } 743145836Smlaier 744145836Smlaier if (!bad) 745145836Smlaier return (0); 746145836Smlaier 747145836Smlaier if ((*state)->rule.ptr->overload_tbl) { 748145836Smlaier struct pfr_addr p; 749145836Smlaier u_int32_t killed = 0; 750145836Smlaier 751145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_TABLE]++; 752145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 753145836Smlaier printf("pf_src_connlimit: blocking address "); 754145836Smlaier pf_print_host(&(*state)->src_node->addr, 0, 755145836Smlaier (*state)->af); 756145836Smlaier } 757145836Smlaier 758145836Smlaier bzero(&p, sizeof(p)); 759145836Smlaier p.pfra_af = (*state)->af; 760145836Smlaier switch ((*state)->af) { 761145836Smlaier#ifdef INET 762145836Smlaier case AF_INET: 763145836Smlaier p.pfra_net = 32; 764145836Smlaier p.pfra_ip4addr = (*state)->src_node->addr.v4; 765145836Smlaier break; 766145836Smlaier#endif /* INET */ 767145836Smlaier#ifdef INET6 768145836Smlaier case AF_INET6: 769145836Smlaier p.pfra_net = 128; 770145836Smlaier p.pfra_ip6addr = (*state)->src_node->addr.v6; 771145836Smlaier break; 772145836Smlaier#endif /* INET6 */ 773145836Smlaier } 774145836Smlaier 775145836Smlaier pfr_insert_kentry((*state)->rule.ptr->overload_tbl, 776145836Smlaier &p, time_second); 777145836Smlaier 778145836Smlaier /* kill existing states if that's required. */ 779145836Smlaier if ((*state)->rule.ptr->flush) { 780145836Smlaier pf_status.lcounters[LCNT_OVERLOAD_FLUSH]++; 781145836Smlaier 782145836Smlaier RB_FOREACH(s, pf_state_tree_id, &tree_id) { 783145836Smlaier /* 784145836Smlaier * Kill states from this source. (Only those 785145836Smlaier * from the same rule if PF_FLUSH_GLOBAL is not 786145836Smlaier * set) 787145836Smlaier */ 788145836Smlaier if (s->af == (*state)->af && 789145836Smlaier (((*state)->direction == PF_OUT && 790145836Smlaier PF_AEQ(&(*state)->src_node->addr, 791145836Smlaier &s->lan.addr, s->af)) || 792145836Smlaier ((*state)->direction == PF_IN && 793145836Smlaier PF_AEQ(&(*state)->src_node->addr, 794145836Smlaier &s->ext.addr, s->af))) && 795145836Smlaier ((*state)->rule.ptr->flush & 796145836Smlaier PF_FLUSH_GLOBAL || 797145836Smlaier (*state)->rule.ptr == s->rule.ptr)) { 798145836Smlaier s->timeout = PFTM_PURGE; 799145836Smlaier s->src.state = s->dst.state = 800145836Smlaier TCPS_CLOSED; 801145836Smlaier killed++; 802145836Smlaier } 803145836Smlaier } 804145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 805145836Smlaier printf(", %u states killed", killed); 806145836Smlaier } 807145836Smlaier if (pf_status.debug >= PF_DEBUG_MISC) 808145836Smlaier printf("\n"); 809145836Smlaier } 810145836Smlaier 811145836Smlaier /* kill this state */ 812145836Smlaier (*state)->timeout = PFTM_PURGE; 813145836Smlaier (*state)->src.state = (*state)->dst.state = TCPS_CLOSED; 814145836Smlaier return (1); 815145836Smlaier} 816145836Smlaier 817145836Smlaierint 818130613Smlaierpf_insert_src_node(struct pf_src_node **sn, struct pf_rule *rule, 819130613Smlaier struct pf_addr *src, sa_family_t af) 820126258Smlaier{ 821130613Smlaier struct pf_src_node k; 822126258Smlaier 823130613Smlaier if (*sn == NULL) { 824130613Smlaier k.af = af; 825130613Smlaier PF_ACPY(&k.addr, src, af); 826130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 827130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 828130613Smlaier k.rule.ptr = rule; 829130613Smlaier else 830130613Smlaier k.rule.ptr = NULL; 831130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 832130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 833130613Smlaier } 834130613Smlaier if (*sn == NULL) { 835130613Smlaier if (!rule->max_src_nodes || 836130613Smlaier rule->src_nodes < rule->max_src_nodes) 837130613Smlaier (*sn) = pool_get(&pf_src_tree_pl, PR_NOWAIT); 838145836Smlaier else 839145836Smlaier pf_status.lcounters[LCNT_SRCNODES]++; 840130613Smlaier if ((*sn) == NULL) 841130613Smlaier return (-1); 842130613Smlaier bzero(*sn, sizeof(struct pf_src_node)); 843145836Smlaier 844145836Smlaier pf_init_threshold(&(*sn)->conn_rate, 845145836Smlaier rule->max_src_conn_rate.limit, 846145836Smlaier rule->max_src_conn_rate.seconds); 847145836Smlaier 848130613Smlaier (*sn)->af = af; 849130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 850130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 851130613Smlaier (*sn)->rule.ptr = rule; 852130613Smlaier else 853130613Smlaier (*sn)->rule.ptr = NULL; 854130613Smlaier PF_ACPY(&(*sn)->addr, src, af); 855130613Smlaier if (RB_INSERT(pf_src_tree, 856130613Smlaier &tree_src_tracking, *sn) != NULL) { 857130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 858130613Smlaier printf("pf: src_tree insert failed: "); 859130613Smlaier pf_print_host(&(*sn)->addr, 0, af); 860130613Smlaier printf("\n"); 861130613Smlaier } 862130613Smlaier pool_put(&pf_src_tree_pl, *sn); 863130613Smlaier return (-1); 864130613Smlaier } 865130613Smlaier (*sn)->creation = time_second; 866130613Smlaier (*sn)->ruletype = rule->action; 867130613Smlaier if ((*sn)->rule.ptr != NULL) 868130613Smlaier (*sn)->rule.ptr->src_nodes++; 869130613Smlaier pf_status.scounters[SCNT_SRC_NODE_INSERT]++; 870130613Smlaier pf_status.src_nodes++; 871130613Smlaier } else { 872130613Smlaier if (rule->max_src_states && 873145836Smlaier (*sn)->states >= rule->max_src_states) { 874145836Smlaier pf_status.lcounters[LCNT_SRCSTATES]++; 875130613Smlaier return (-1); 876145836Smlaier } 877130613Smlaier } 878130613Smlaier return (0); 879130613Smlaier} 880126258Smlaier 881130613Smlaierint 882130613Smlaierpf_insert_state(struct pfi_kif *kif, struct pf_state *state) 883130613Smlaier{ 884126258Smlaier /* Thou MUST NOT insert multiple duplicate keys */ 885130613Smlaier state->u.s.kif = kif; 886130613Smlaier if (RB_INSERT(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state)) { 887126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 888126258Smlaier printf("pf: state insert failed: tree_lan_ext"); 889126258Smlaier printf(" lan: "); 890126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 891126258Smlaier state->af); 892126258Smlaier printf(" gwy: "); 893126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 894126258Smlaier state->af); 895126258Smlaier printf(" ext: "); 896126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 897126258Smlaier state->af); 898130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 899130613Smlaier printf(" (from sync)"); 900126258Smlaier printf("\n"); 901126258Smlaier } 902126258Smlaier return (-1); 903126258Smlaier } 904126258Smlaier 905130613Smlaier if (RB_INSERT(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state)) { 906126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 907126258Smlaier printf("pf: state insert failed: tree_ext_gwy"); 908126258Smlaier printf(" lan: "); 909126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 910126258Smlaier state->af); 911126258Smlaier printf(" gwy: "); 912126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 913126258Smlaier state->af); 914126258Smlaier printf(" ext: "); 915126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 916126258Smlaier state->af); 917130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 918130613Smlaier printf(" (from sync)"); 919126258Smlaier printf("\n"); 920126258Smlaier } 921130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 922126258Smlaier return (-1); 923126258Smlaier } 924126258Smlaier 925130613Smlaier if (state->id == 0 && state->creatorid == 0) { 926130613Smlaier state->id = htobe64(pf_status.stateid++); 927130613Smlaier state->creatorid = pf_status.hostid; 928130613Smlaier } 929130613Smlaier if (RB_INSERT(pf_state_tree_id, &tree_id, state) != NULL) { 930130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 931130613Smlaier#ifdef __FreeBSD__ 932130613Smlaier printf("pf: state insert failed: " 933130613Smlaier "id: %016llx creatorid: %08x", 934130613Smlaier (long long)be64toh(state->id), 935130613Smlaier ntohl(state->creatorid)); 936130613Smlaier#else 937130613Smlaier printf("pf: state insert failed: " 938130613Smlaier "id: %016llx creatorid: %08x", 939130613Smlaier betoh64(state->id), ntohl(state->creatorid)); 940130613Smlaier#endif 941130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 942130613Smlaier printf(" (from sync)"); 943130613Smlaier printf("\n"); 944130613Smlaier } 945130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 946130613Smlaier RB_REMOVE(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state); 947130613Smlaier return (-1); 948130613Smlaier } 949130613Smlaier TAILQ_INSERT_HEAD(&state_updates, state, u.s.entry_updates); 950130613Smlaier 951126258Smlaier pf_status.fcounters[FCNT_STATE_INSERT]++; 952126258Smlaier pf_status.states++; 953130613Smlaier pfi_attach_state(kif); 954126258Smlaier#if NPFSYNC 955126258Smlaier pfsync_insert_state(state); 956126258Smlaier#endif 957126258Smlaier return (0); 958126258Smlaier} 959126258Smlaier 960126258Smlaiervoid 961126258Smlaierpf_purge_timeout(void *arg) 962126258Smlaier{ 963127145Smlaier#ifdef __FreeBSD__ 964126261Smlaier struct callout *to = arg; 965126261Smlaier#else 966126258Smlaier struct timeout *to = arg; 967126261Smlaier#endif 968126258Smlaier int s; 969126258Smlaier 970127145Smlaier#ifdef __FreeBSD__ 971126261Smlaier PF_LOCK(); 972126261Smlaier#endif 973126258Smlaier s = splsoftnet(); 974126258Smlaier pf_purge_expired_states(); 975126258Smlaier pf_purge_expired_fragments(); 976130613Smlaier pf_purge_expired_src_nodes(); 977126258Smlaier splx(s); 978127145Smlaier#ifdef __FreeBSD__ 979126261Smlaier PF_UNLOCK(); 980126261Smlaier#endif 981126258Smlaier 982127145Smlaier#ifdef __FreeBSD__ 983126261Smlaier callout_reset(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz, 984126261Smlaier pf_purge_timeout, to); 985126261Smlaier#else 986126258Smlaier timeout_add(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz); 987126261Smlaier#endif 988126258Smlaier} 989126258Smlaier 990126258Smlaieru_int32_t 991126258Smlaierpf_state_expires(const struct pf_state *state) 992126258Smlaier{ 993126258Smlaier u_int32_t timeout; 994126258Smlaier u_int32_t start; 995126258Smlaier u_int32_t end; 996126258Smlaier u_int32_t states; 997126258Smlaier 998126258Smlaier /* handle all PFTM_* > PFTM_MAX here */ 999126258Smlaier if (state->timeout == PFTM_PURGE) 1000126261Smlaier return (time_second); 1001126258Smlaier if (state->timeout == PFTM_UNTIL_PACKET) 1002126258Smlaier return (0); 1003127145Smlaier#ifdef __FreeBSD__ 1004126261Smlaier KASSERT((state->timeout < PFTM_MAX), 1005126261Smlaier ("pf_state_expires: timeout > PFTM_MAX")); 1006126261Smlaier#else 1007126258Smlaier KASSERT(state->timeout < PFTM_MAX); 1008126261Smlaier#endif 1009126258Smlaier timeout = state->rule.ptr->timeout[state->timeout]; 1010126258Smlaier if (!timeout) 1011126258Smlaier timeout = pf_default_rule.timeout[state->timeout]; 1012126258Smlaier start = state->rule.ptr->timeout[PFTM_ADAPTIVE_START]; 1013126258Smlaier if (start) { 1014126258Smlaier end = state->rule.ptr->timeout[PFTM_ADAPTIVE_END]; 1015126258Smlaier states = state->rule.ptr->states; 1016126258Smlaier } else { 1017126258Smlaier start = pf_default_rule.timeout[PFTM_ADAPTIVE_START]; 1018126258Smlaier end = pf_default_rule.timeout[PFTM_ADAPTIVE_END]; 1019126258Smlaier states = pf_status.states; 1020126258Smlaier } 1021126258Smlaier if (end && states > start && start < end) { 1022126258Smlaier if (states < end) 1023126258Smlaier return (state->expire + timeout * (end - states) / 1024126258Smlaier (end - start)); 1025126258Smlaier else 1026126261Smlaier return (time_second); 1027126258Smlaier } 1028126258Smlaier return (state->expire + timeout); 1029126258Smlaier} 1030126258Smlaier 1031126258Smlaiervoid 1032130613Smlaierpf_purge_expired_src_nodes(void) 1033126258Smlaier{ 1034130613Smlaier struct pf_src_node *cur, *next; 1035126258Smlaier 1036130613Smlaier for (cur = RB_MIN(pf_src_tree, &tree_src_tracking); cur; cur = next) { 1037130613Smlaier next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur); 1038126258Smlaier 1039130613Smlaier if (cur->states <= 0 && cur->expire <= time_second) { 1040130613Smlaier if (cur->rule.ptr != NULL) { 1041130613Smlaier cur->rule.ptr->src_nodes--; 1042130613Smlaier if (cur->rule.ptr->states <= 0 && 1043130613Smlaier cur->rule.ptr->max_src_nodes <= 0) 1044130613Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1045130613Smlaier } 1046130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, cur); 1047130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 1048130613Smlaier pf_status.src_nodes--; 1049130613Smlaier pool_put(&pf_src_tree_pl, cur); 1050130613Smlaier } 1051130613Smlaier } 1052130613Smlaier} 1053126258Smlaier 1054130613Smlaiervoid 1055130613Smlaierpf_src_tree_remove_state(struct pf_state *s) 1056130613Smlaier{ 1057130613Smlaier u_int32_t timeout; 1058126258Smlaier 1059130613Smlaier if (s->src_node != NULL) { 1060145836Smlaier if (s->proto == IPPROTO_TCP) { 1061145836Smlaier if (s->src.state == PF_TCPS_PROXY_DST || 1062145836Smlaier s->timeout >= PFTM_TCP_ESTABLISHED) 1063145836Smlaier --s->src_node->conn; 1064145836Smlaier } 1065130613Smlaier if (--s->src_node->states <= 0) { 1066130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1067130613Smlaier if (!timeout) 1068130613Smlaier timeout = 1069130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1070130613Smlaier s->src_node->expire = time_second + timeout; 1071130613Smlaier } 1072130613Smlaier } 1073130613Smlaier if (s->nat_src_node != s->src_node && s->nat_src_node != NULL) { 1074130613Smlaier if (--s->nat_src_node->states <= 0) { 1075130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 1076130613Smlaier if (!timeout) 1077130613Smlaier timeout = 1078130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 1079130613Smlaier s->nat_src_node->expire = time_second + timeout; 1080130613Smlaier } 1081130613Smlaier } 1082130613Smlaier s->src_node = s->nat_src_node = NULL; 1083130613Smlaier} 1084126258Smlaier 1085130613Smlaiervoid 1086145836Smlaierpf_purge_expired_state(struct pf_state *cur) 1087145836Smlaier{ 1088145836Smlaier if (cur->src.state == PF_TCPS_PROXY_DST) 1089145836Smlaier pf_send_tcp(cur->rule.ptr, cur->af, 1090145836Smlaier &cur->ext.addr, &cur->lan.addr, 1091145836Smlaier cur->ext.port, cur->lan.port, 1092145836Smlaier cur->src.seqhi, cur->src.seqlo + 1, 1093145836Smlaier TH_RST|TH_ACK, 0, 0, 0, 1, NULL, NULL); 1094145836Smlaier RB_REMOVE(pf_state_tree_ext_gwy, 1095145836Smlaier &cur->u.s.kif->pfik_ext_gwy, cur); 1096145836Smlaier RB_REMOVE(pf_state_tree_lan_ext, 1097145836Smlaier &cur->u.s.kif->pfik_lan_ext, cur); 1098145836Smlaier RB_REMOVE(pf_state_tree_id, &tree_id, cur); 1099145836Smlaier#if NPFSYNC 1100145836Smlaier pfsync_delete_state(cur); 1101145836Smlaier#endif 1102145836Smlaier pf_src_tree_remove_state(cur); 1103145836Smlaier if (--cur->rule.ptr->states <= 0 && 1104145836Smlaier cur->rule.ptr->src_nodes <= 0) 1105145836Smlaier pf_rm_rule(NULL, cur->rule.ptr); 1106145836Smlaier if (cur->nat_rule.ptr != NULL) 1107145836Smlaier if (--cur->nat_rule.ptr->states <= 0 && 1108145836Smlaier cur->nat_rule.ptr->src_nodes <= 0) 1109145836Smlaier pf_rm_rule(NULL, cur->nat_rule.ptr); 1110145836Smlaier if (cur->anchor.ptr != NULL) 1111145836Smlaier if (--cur->anchor.ptr->states <= 0) 1112145836Smlaier pf_rm_rule(NULL, cur->anchor.ptr); 1113145836Smlaier pf_normalize_tcp_cleanup(cur); 1114145836Smlaier pfi_detach_state(cur->u.s.kif); 1115145836Smlaier TAILQ_REMOVE(&state_updates, cur, u.s.entry_updates); 1116145836Smlaier if (cur->tag) 1117145836Smlaier pf_tag_unref(cur->tag); 1118145836Smlaier pool_put(&pf_state_pl, cur); 1119145836Smlaier pf_status.fcounters[FCNT_STATE_REMOVALS]++; 1120145836Smlaier pf_status.states--; 1121145836Smlaier} 1122145836Smlaier 1123145836Smlaiervoid 1124130613Smlaierpf_purge_expired_states(void) 1125130613Smlaier{ 1126130613Smlaier struct pf_state *cur, *next; 1127130613Smlaier 1128130613Smlaier for (cur = RB_MIN(pf_state_tree_id, &tree_id); 1129130613Smlaier cur; cur = next) { 1130130613Smlaier next = RB_NEXT(pf_state_tree_id, &tree_id, cur); 1131145836Smlaier if (pf_state_expires(cur) <= time_second) 1132145836Smlaier pf_purge_expired_state(cur); 1133126258Smlaier } 1134126258Smlaier} 1135126258Smlaier 1136126258Smlaierint 1137126258Smlaierpf_tbladdr_setup(struct pf_ruleset *rs, struct pf_addr_wrap *aw) 1138126258Smlaier{ 1139126258Smlaier if (aw->type != PF_ADDR_TABLE) 1140126258Smlaier return (0); 1141126258Smlaier if ((aw->p.tbl = pfr_attach_table(rs, aw->v.tblname)) == NULL) 1142126258Smlaier return (1); 1143126258Smlaier return (0); 1144126258Smlaier} 1145126258Smlaier 1146126258Smlaiervoid 1147126258Smlaierpf_tbladdr_remove(struct pf_addr_wrap *aw) 1148126258Smlaier{ 1149126258Smlaier if (aw->type != PF_ADDR_TABLE || aw->p.tbl == NULL) 1150126258Smlaier return; 1151126258Smlaier pfr_detach_table(aw->p.tbl); 1152126258Smlaier aw->p.tbl = NULL; 1153126258Smlaier} 1154126258Smlaier 1155126258Smlaiervoid 1156126258Smlaierpf_tbladdr_copyout(struct pf_addr_wrap *aw) 1157126258Smlaier{ 1158126258Smlaier struct pfr_ktable *kt = aw->p.tbl; 1159126258Smlaier 1160126258Smlaier if (aw->type != PF_ADDR_TABLE || kt == NULL) 1161126258Smlaier return; 1162126258Smlaier if (!(kt->pfrkt_flags & PFR_TFLAG_ACTIVE) && kt->pfrkt_root != NULL) 1163126258Smlaier kt = kt->pfrkt_root; 1164126258Smlaier aw->p.tbl = NULL; 1165126258Smlaier aw->p.tblcnt = (kt->pfrkt_flags & PFR_TFLAG_ACTIVE) ? 1166126258Smlaier kt->pfrkt_cnt : -1; 1167126258Smlaier} 1168126258Smlaier 1169126258Smlaiervoid 1170126258Smlaierpf_print_host(struct pf_addr *addr, u_int16_t p, sa_family_t af) 1171126258Smlaier{ 1172126258Smlaier switch (af) { 1173126258Smlaier#ifdef INET 1174126258Smlaier case AF_INET: { 1175126258Smlaier u_int32_t a = ntohl(addr->addr32[0]); 1176126258Smlaier printf("%u.%u.%u.%u", (a>>24)&255, (a>>16)&255, 1177126258Smlaier (a>>8)&255, a&255); 1178126258Smlaier if (p) { 1179126258Smlaier p = ntohs(p); 1180126258Smlaier printf(":%u", p); 1181126258Smlaier } 1182126258Smlaier break; 1183126258Smlaier } 1184126258Smlaier#endif /* INET */ 1185126258Smlaier#ifdef INET6 1186126258Smlaier case AF_INET6: { 1187126258Smlaier u_int16_t b; 1188126258Smlaier u_int8_t i, curstart = 255, curend = 0, 1189126258Smlaier maxstart = 0, maxend = 0; 1190126258Smlaier for (i = 0; i < 8; i++) { 1191126258Smlaier if (!addr->addr16[i]) { 1192126258Smlaier if (curstart == 255) 1193126258Smlaier curstart = i; 1194126258Smlaier else 1195126258Smlaier curend = i; 1196126258Smlaier } else { 1197126258Smlaier if (curstart) { 1198126258Smlaier if ((curend - curstart) > 1199126258Smlaier (maxend - maxstart)) { 1200126258Smlaier maxstart = curstart; 1201126258Smlaier maxend = curend; 1202126258Smlaier curstart = 255; 1203126258Smlaier } 1204126258Smlaier } 1205126258Smlaier } 1206126258Smlaier } 1207126258Smlaier for (i = 0; i < 8; i++) { 1208126258Smlaier if (i >= maxstart && i <= maxend) { 1209126258Smlaier if (maxend != 7) { 1210126258Smlaier if (i == maxstart) 1211126258Smlaier printf(":"); 1212126258Smlaier } else { 1213126258Smlaier if (i == maxend) 1214126258Smlaier printf(":"); 1215126258Smlaier } 1216126258Smlaier } else { 1217126258Smlaier b = ntohs(addr->addr16[i]); 1218126258Smlaier printf("%x", b); 1219126258Smlaier if (i < 7) 1220126258Smlaier printf(":"); 1221126258Smlaier } 1222126258Smlaier } 1223126258Smlaier if (p) { 1224126258Smlaier p = ntohs(p); 1225126258Smlaier printf("[%u]", p); 1226126258Smlaier } 1227126258Smlaier break; 1228126258Smlaier } 1229126258Smlaier#endif /* INET6 */ 1230126258Smlaier } 1231126258Smlaier} 1232126258Smlaier 1233126258Smlaiervoid 1234126258Smlaierpf_print_state(struct pf_state *s) 1235126258Smlaier{ 1236126258Smlaier switch (s->proto) { 1237126258Smlaier case IPPROTO_TCP: 1238126258Smlaier printf("TCP "); 1239126258Smlaier break; 1240126258Smlaier case IPPROTO_UDP: 1241126258Smlaier printf("UDP "); 1242126258Smlaier break; 1243126258Smlaier case IPPROTO_ICMP: 1244126258Smlaier printf("ICMP "); 1245126258Smlaier break; 1246126258Smlaier case IPPROTO_ICMPV6: 1247126258Smlaier printf("ICMPV6 "); 1248126258Smlaier break; 1249126258Smlaier default: 1250126258Smlaier printf("%u ", s->proto); 1251126258Smlaier break; 1252126258Smlaier } 1253126258Smlaier pf_print_host(&s->lan.addr, s->lan.port, s->af); 1254126258Smlaier printf(" "); 1255126258Smlaier pf_print_host(&s->gwy.addr, s->gwy.port, s->af); 1256126258Smlaier printf(" "); 1257126258Smlaier pf_print_host(&s->ext.addr, s->ext.port, s->af); 1258126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->src.seqlo, 1259126258Smlaier s->src.seqhi, s->src.max_win, s->src.seqdiff); 1260126258Smlaier if (s->src.wscale && s->dst.wscale) 1261126258Smlaier printf(" wscale=%u", s->src.wscale & PF_WSCALE_MASK); 1262126258Smlaier printf("]"); 1263126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->dst.seqlo, 1264126258Smlaier s->dst.seqhi, s->dst.max_win, s->dst.seqdiff); 1265126258Smlaier if (s->src.wscale && s->dst.wscale) 1266126258Smlaier printf(" wscale=%u", s->dst.wscale & PF_WSCALE_MASK); 1267126258Smlaier printf("]"); 1268126258Smlaier printf(" %u:%u", s->src.state, s->dst.state); 1269126258Smlaier} 1270126258Smlaier 1271126258Smlaiervoid 1272126258Smlaierpf_print_flags(u_int8_t f) 1273126258Smlaier{ 1274126258Smlaier if (f) 1275126258Smlaier printf(" "); 1276126258Smlaier if (f & TH_FIN) 1277126258Smlaier printf("F"); 1278126258Smlaier if (f & TH_SYN) 1279126258Smlaier printf("S"); 1280126258Smlaier if (f & TH_RST) 1281126258Smlaier printf("R"); 1282126258Smlaier if (f & TH_PUSH) 1283126258Smlaier printf("P"); 1284126258Smlaier if (f & TH_ACK) 1285126258Smlaier printf("A"); 1286126258Smlaier if (f & TH_URG) 1287126258Smlaier printf("U"); 1288126258Smlaier if (f & TH_ECE) 1289126258Smlaier printf("E"); 1290126258Smlaier if (f & TH_CWR) 1291126258Smlaier printf("W"); 1292126258Smlaier} 1293126258Smlaier 1294126258Smlaier#define PF_SET_SKIP_STEPS(i) \ 1295126258Smlaier do { \ 1296126258Smlaier while (head[i] != cur) { \ 1297126258Smlaier head[i]->skip[i].ptr = cur; \ 1298126258Smlaier head[i] = TAILQ_NEXT(head[i], entries); \ 1299126258Smlaier } \ 1300126258Smlaier } while (0) 1301126258Smlaier 1302126258Smlaiervoid 1303126258Smlaierpf_calc_skip_steps(struct pf_rulequeue *rules) 1304126258Smlaier{ 1305126258Smlaier struct pf_rule *cur, *prev, *head[PF_SKIP_COUNT]; 1306126258Smlaier int i; 1307126258Smlaier 1308126258Smlaier cur = TAILQ_FIRST(rules); 1309126258Smlaier prev = cur; 1310126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1311126258Smlaier head[i] = cur; 1312126258Smlaier while (cur != NULL) { 1313126258Smlaier 1314130613Smlaier if (cur->kif != prev->kif || cur->ifnot != prev->ifnot) 1315126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_IFP); 1316126258Smlaier if (cur->direction != prev->direction) 1317126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DIR); 1318126258Smlaier if (cur->af != prev->af) 1319126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_AF); 1320126258Smlaier if (cur->proto != prev->proto) 1321126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_PROTO); 1322145836Smlaier if (cur->src.neg != prev->src.neg || 1323126258Smlaier pf_addr_wrap_neq(&cur->src.addr, &prev->src.addr)) 1324126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_ADDR); 1325126258Smlaier if (cur->src.port[0] != prev->src.port[0] || 1326126258Smlaier cur->src.port[1] != prev->src.port[1] || 1327126258Smlaier cur->src.port_op != prev->src.port_op) 1328126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_PORT); 1329145836Smlaier if (cur->dst.neg != prev->dst.neg || 1330126258Smlaier pf_addr_wrap_neq(&cur->dst.addr, &prev->dst.addr)) 1331126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_ADDR); 1332126258Smlaier if (cur->dst.port[0] != prev->dst.port[0] || 1333126258Smlaier cur->dst.port[1] != prev->dst.port[1] || 1334126258Smlaier cur->dst.port_op != prev->dst.port_op) 1335126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_PORT); 1336126258Smlaier 1337126258Smlaier prev = cur; 1338126258Smlaier cur = TAILQ_NEXT(cur, entries); 1339126258Smlaier } 1340126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1341126258Smlaier PF_SET_SKIP_STEPS(i); 1342126258Smlaier} 1343126258Smlaier 1344126258Smlaierint 1345126258Smlaierpf_addr_wrap_neq(struct pf_addr_wrap *aw1, struct pf_addr_wrap *aw2) 1346126258Smlaier{ 1347126258Smlaier if (aw1->type != aw2->type) 1348126258Smlaier return (1); 1349126258Smlaier switch (aw1->type) { 1350126258Smlaier case PF_ADDR_ADDRMASK: 1351126258Smlaier if (PF_ANEQ(&aw1->v.a.addr, &aw2->v.a.addr, 0)) 1352126258Smlaier return (1); 1353126258Smlaier if (PF_ANEQ(&aw1->v.a.mask, &aw2->v.a.mask, 0)) 1354126258Smlaier return (1); 1355126258Smlaier return (0); 1356126258Smlaier case PF_ADDR_DYNIFTL: 1357130613Smlaier return (aw1->p.dyn->pfid_kt != aw2->p.dyn->pfid_kt); 1358126258Smlaier case PF_ADDR_NOROUTE: 1359126258Smlaier return (0); 1360126258Smlaier case PF_ADDR_TABLE: 1361126258Smlaier return (aw1->p.tbl != aw2->p.tbl); 1362126258Smlaier default: 1363126258Smlaier printf("invalid address type: %d\n", aw1->type); 1364126258Smlaier return (1); 1365126258Smlaier } 1366126258Smlaier} 1367126258Smlaier 1368126258Smlaieru_int16_t 1369126258Smlaierpf_cksum_fixup(u_int16_t cksum, u_int16_t old, u_int16_t new, u_int8_t udp) 1370126258Smlaier{ 1371126258Smlaier u_int32_t l; 1372126258Smlaier 1373126258Smlaier if (udp && !cksum) 1374126258Smlaier return (0x0000); 1375126258Smlaier l = cksum + old - new; 1376126258Smlaier l = (l >> 16) + (l & 65535); 1377126258Smlaier l = l & 65535; 1378126258Smlaier if (udp && !l) 1379126258Smlaier return (0xFFFF); 1380126258Smlaier return (l); 1381126258Smlaier} 1382126258Smlaier 1383126258Smlaiervoid 1384126258Smlaierpf_change_ap(struct pf_addr *a, u_int16_t *p, u_int16_t *ic, u_int16_t *pc, 1385126258Smlaier struct pf_addr *an, u_int16_t pn, u_int8_t u, sa_family_t af) 1386126258Smlaier{ 1387126258Smlaier struct pf_addr ao; 1388126258Smlaier u_int16_t po = *p; 1389126258Smlaier 1390126258Smlaier PF_ACPY(&ao, a, af); 1391126258Smlaier PF_ACPY(a, an, af); 1392126258Smlaier 1393126258Smlaier *p = pn; 1394126258Smlaier 1395126258Smlaier switch (af) { 1396126258Smlaier#ifdef INET 1397126258Smlaier case AF_INET: 1398126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1399126258Smlaier ao.addr16[0], an->addr16[0], 0), 1400126258Smlaier ao.addr16[1], an->addr16[1], 0); 1401126258Smlaier *p = pn; 1402126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1403126258Smlaier ao.addr16[0], an->addr16[0], u), 1404126258Smlaier ao.addr16[1], an->addr16[1], u), 1405126258Smlaier po, pn, u); 1406126258Smlaier break; 1407126258Smlaier#endif /* INET */ 1408126258Smlaier#ifdef INET6 1409126258Smlaier case AF_INET6: 1410126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1411126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1412126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1413126258Smlaier ao.addr16[0], an->addr16[0], u), 1414126258Smlaier ao.addr16[1], an->addr16[1], u), 1415126258Smlaier ao.addr16[2], an->addr16[2], u), 1416126258Smlaier ao.addr16[3], an->addr16[3], u), 1417126258Smlaier ao.addr16[4], an->addr16[4], u), 1418126258Smlaier ao.addr16[5], an->addr16[5], u), 1419126258Smlaier ao.addr16[6], an->addr16[6], u), 1420126258Smlaier ao.addr16[7], an->addr16[7], u), 1421126258Smlaier po, pn, u); 1422126258Smlaier break; 1423126258Smlaier#endif /* INET6 */ 1424126258Smlaier } 1425126258Smlaier} 1426126258Smlaier 1427126258Smlaier 1428126258Smlaier/* Changes a u_int32_t. Uses a void * so there are no align restrictions */ 1429126258Smlaiervoid 1430126258Smlaierpf_change_a(void *a, u_int16_t *c, u_int32_t an, u_int8_t u) 1431126258Smlaier{ 1432126258Smlaier u_int32_t ao; 1433126258Smlaier 1434126258Smlaier memcpy(&ao, a, sizeof(ao)); 1435126258Smlaier memcpy(a, &an, sizeof(u_int32_t)); 1436126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(*c, ao / 65536, an / 65536, u), 1437126258Smlaier ao % 65536, an % 65536, u); 1438126258Smlaier} 1439126258Smlaier 1440126258Smlaier#ifdef INET6 1441126258Smlaiervoid 1442126258Smlaierpf_change_a6(struct pf_addr *a, u_int16_t *c, struct pf_addr *an, u_int8_t u) 1443126258Smlaier{ 1444126258Smlaier struct pf_addr ao; 1445126258Smlaier 1446126258Smlaier PF_ACPY(&ao, a, AF_INET6); 1447126258Smlaier PF_ACPY(a, an, AF_INET6); 1448126258Smlaier 1449126258Smlaier *c = 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(*c, 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} 1461126258Smlaier#endif /* INET6 */ 1462126258Smlaier 1463126258Smlaiervoid 1464126258Smlaierpf_change_icmp(struct pf_addr *ia, u_int16_t *ip, struct pf_addr *oa, 1465126258Smlaier struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c, 1466126258Smlaier u_int16_t *ic, u_int16_t *hc, u_int8_t u, sa_family_t af) 1467126258Smlaier{ 1468126258Smlaier struct pf_addr oia, ooa; 1469126258Smlaier 1470126258Smlaier PF_ACPY(&oia, ia, af); 1471126258Smlaier PF_ACPY(&ooa, oa, af); 1472126258Smlaier 1473126258Smlaier /* Change inner protocol port, fix inner protocol checksum. */ 1474126258Smlaier if (ip != NULL) { 1475126258Smlaier u_int16_t oip = *ip; 1476127629Smlaier u_int32_t opc = 0; /* make the compiler happy */ 1477126258Smlaier 1478126258Smlaier if (pc != NULL) 1479126258Smlaier opc = *pc; 1480126258Smlaier *ip = np; 1481126258Smlaier if (pc != NULL) 1482126258Smlaier *pc = pf_cksum_fixup(*pc, oip, *ip, u); 1483126258Smlaier *ic = pf_cksum_fixup(*ic, oip, *ip, 0); 1484126258Smlaier if (pc != NULL) 1485126258Smlaier *ic = pf_cksum_fixup(*ic, opc, *pc, 0); 1486126258Smlaier } 1487126258Smlaier /* Change inner ip address, fix inner ip and icmp checksums. */ 1488126258Smlaier PF_ACPY(ia, na, af); 1489126258Smlaier switch (af) { 1490126258Smlaier#ifdef INET 1491126258Smlaier case AF_INET: { 1492126258Smlaier u_int32_t oh2c = *h2c; 1493126258Smlaier 1494126258Smlaier *h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c, 1495126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1496126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1497126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1498126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1499126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1500126258Smlaier *ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0); 1501126258Smlaier break; 1502126258Smlaier } 1503126258Smlaier#endif /* INET */ 1504126258Smlaier#ifdef INET6 1505126258Smlaier case AF_INET6: 1506126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1507126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1508126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1509126258Smlaier oia.addr16[0], ia->addr16[0], u), 1510126258Smlaier oia.addr16[1], ia->addr16[1], u), 1511126258Smlaier oia.addr16[2], ia->addr16[2], u), 1512126258Smlaier oia.addr16[3], ia->addr16[3], u), 1513126258Smlaier oia.addr16[4], ia->addr16[4], u), 1514126258Smlaier oia.addr16[5], ia->addr16[5], u), 1515126258Smlaier oia.addr16[6], ia->addr16[6], u), 1516126258Smlaier oia.addr16[7], ia->addr16[7], u); 1517126258Smlaier break; 1518126258Smlaier#endif /* INET6 */ 1519126258Smlaier } 1520126258Smlaier /* Change outer ip address, fix outer ip or icmpv6 checksum. */ 1521126258Smlaier PF_ACPY(oa, na, af); 1522126258Smlaier switch (af) { 1523126258Smlaier#ifdef INET 1524126258Smlaier case AF_INET: 1525126258Smlaier *hc = pf_cksum_fixup(pf_cksum_fixup(*hc, 1526126258Smlaier ooa.addr16[0], oa->addr16[0], 0), 1527126258Smlaier ooa.addr16[1], oa->addr16[1], 0); 1528126258Smlaier break; 1529126258Smlaier#endif /* INET */ 1530126258Smlaier#ifdef INET6 1531126258Smlaier case AF_INET6: 1532126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1533126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1534126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1535126258Smlaier ooa.addr16[0], oa->addr16[0], u), 1536126258Smlaier ooa.addr16[1], oa->addr16[1], u), 1537126258Smlaier ooa.addr16[2], oa->addr16[2], u), 1538126258Smlaier ooa.addr16[3], oa->addr16[3], u), 1539126258Smlaier ooa.addr16[4], oa->addr16[4], u), 1540126258Smlaier ooa.addr16[5], oa->addr16[5], u), 1541126258Smlaier ooa.addr16[6], oa->addr16[6], u), 1542126258Smlaier ooa.addr16[7], oa->addr16[7], u); 1543126258Smlaier break; 1544126258Smlaier#endif /* INET6 */ 1545126258Smlaier } 1546126258Smlaier} 1547126258Smlaier 1548126258Smlaiervoid 1549126258Smlaierpf_send_tcp(const struct pf_rule *r, sa_family_t af, 1550126258Smlaier const struct pf_addr *saddr, const struct pf_addr *daddr, 1551126258Smlaier u_int16_t sport, u_int16_t dport, u_int32_t seq, u_int32_t ack, 1552145836Smlaier u_int8_t flags, u_int16_t win, u_int16_t mss, u_int8_t ttl, int tag, 1553145836Smlaier struct ether_header *eh, struct ifnet *ifp) 1554126258Smlaier{ 1555126258Smlaier struct mbuf *m; 1556127629Smlaier int len = 0, tlen; /* make the compiler happy */ 1557126258Smlaier#ifdef INET 1558127629Smlaier struct ip *h = NULL; /* make the compiler happy */ 1559126258Smlaier#endif /* INET */ 1560126258Smlaier#ifdef INET6 1561127629Smlaier struct ip6_hdr *h6 = NULL; /* make the compiler happy */ 1562126258Smlaier#endif /* INET6 */ 1563127629Smlaier struct tcphdr *th = NULL; /* make the compiler happy */ 1564126258Smlaier char *opt; 1565126258Smlaier 1566126258Smlaier /* maximum segment size tcp option */ 1567126258Smlaier tlen = sizeof(struct tcphdr); 1568126258Smlaier if (mss) 1569126258Smlaier tlen += 4; 1570126258Smlaier 1571126258Smlaier switch (af) { 1572126258Smlaier#ifdef INET 1573126258Smlaier case AF_INET: 1574126258Smlaier len = sizeof(struct ip) + tlen; 1575126258Smlaier break; 1576126258Smlaier#endif /* INET */ 1577126258Smlaier#ifdef INET6 1578126258Smlaier case AF_INET6: 1579126258Smlaier len = sizeof(struct ip6_hdr) + tlen; 1580126258Smlaier break; 1581126258Smlaier#endif /* INET6 */ 1582126258Smlaier } 1583126258Smlaier 1584126258Smlaier /* create outgoing mbuf */ 1585132280Smlaier m = m_gethdr(M_DONTWAIT, MT_HEADER); 1586132280Smlaier if (m == NULL) 1587132280Smlaier return; 1588145836Smlaier if (tag) { 1589145836Smlaier#ifdef __FreeBSD__ 1590145836Smlaier m->m_flags |= M_SKIP_FIREWALL; 1591132280Smlaier#else 1592145836Smlaier struct m_tag *mtag; 1593145836Smlaier 1594145836Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1595145836Smlaier if (mtag == NULL) { 1596145836Smlaier m_freem(m); 1597145836Smlaier return; 1598145836Smlaier } 1599145836Smlaier m_tag_prepend(m, mtag); 1600145836Smlaier#endif 1601126258Smlaier } 1602126258Smlaier#ifdef ALTQ 1603126258Smlaier if (r != NULL && r->qid) { 1604145836Smlaier struct m_tag *mtag; 1605126258Smlaier struct altq_tag *atag; 1606126258Smlaier 1607126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1608126258Smlaier if (mtag != NULL) { 1609126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1610126258Smlaier atag->qid = r->qid; 1611126258Smlaier /* add hints for ecn */ 1612126258Smlaier atag->af = af; 1613126258Smlaier atag->hdr = mtod(m, struct ip *); 1614126258Smlaier m_tag_prepend(m, mtag); 1615126258Smlaier } 1616126258Smlaier } 1617145836Smlaier#endif /* ALTQ */ 1618126258Smlaier m->m_data += max_linkhdr; 1619126258Smlaier m->m_pkthdr.len = m->m_len = len; 1620126258Smlaier m->m_pkthdr.rcvif = NULL; 1621126258Smlaier bzero(m->m_data, len); 1622126258Smlaier switch (af) { 1623126258Smlaier#ifdef INET 1624126258Smlaier case AF_INET: 1625126258Smlaier h = mtod(m, struct ip *); 1626126258Smlaier 1627126258Smlaier /* IP header fields included in the TCP checksum */ 1628126258Smlaier h->ip_p = IPPROTO_TCP; 1629126258Smlaier h->ip_len = htons(tlen); 1630126258Smlaier h->ip_src.s_addr = saddr->v4.s_addr; 1631126258Smlaier h->ip_dst.s_addr = daddr->v4.s_addr; 1632126258Smlaier 1633126258Smlaier th = (struct tcphdr *)((caddr_t)h + sizeof(struct ip)); 1634126258Smlaier break; 1635126258Smlaier#endif /* INET */ 1636126258Smlaier#ifdef INET6 1637126258Smlaier case AF_INET6: 1638126258Smlaier h6 = mtod(m, struct ip6_hdr *); 1639126258Smlaier 1640126258Smlaier /* IP header fields included in the TCP checksum */ 1641126258Smlaier h6->ip6_nxt = IPPROTO_TCP; 1642126258Smlaier h6->ip6_plen = htons(tlen); 1643126258Smlaier memcpy(&h6->ip6_src, &saddr->v6, sizeof(struct in6_addr)); 1644126258Smlaier memcpy(&h6->ip6_dst, &daddr->v6, sizeof(struct in6_addr)); 1645126258Smlaier 1646126258Smlaier th = (struct tcphdr *)((caddr_t)h6 + sizeof(struct ip6_hdr)); 1647126258Smlaier break; 1648126258Smlaier#endif /* INET6 */ 1649126258Smlaier } 1650126258Smlaier 1651126258Smlaier /* TCP header */ 1652126258Smlaier th->th_sport = sport; 1653126258Smlaier th->th_dport = dport; 1654126258Smlaier th->th_seq = htonl(seq); 1655126258Smlaier th->th_ack = htonl(ack); 1656126258Smlaier th->th_off = tlen >> 2; 1657126258Smlaier th->th_flags = flags; 1658126258Smlaier th->th_win = htons(win); 1659126258Smlaier 1660126258Smlaier if (mss) { 1661126258Smlaier opt = (char *)(th + 1); 1662126258Smlaier opt[0] = TCPOPT_MAXSEG; 1663126258Smlaier opt[1] = 4; 1664126258Smlaier HTONS(mss); 1665126258Smlaier bcopy((caddr_t)&mss, (caddr_t)(opt + 2), 2); 1666126258Smlaier } 1667126258Smlaier 1668126258Smlaier switch (af) { 1669126258Smlaier#ifdef INET 1670126258Smlaier case AF_INET: 1671126258Smlaier /* TCP checksum */ 1672126258Smlaier th->th_sum = in_cksum(m, len); 1673126258Smlaier 1674126258Smlaier /* Finish the IP header */ 1675126258Smlaier h->ip_v = 4; 1676126258Smlaier h->ip_hl = sizeof(*h) >> 2; 1677126258Smlaier h->ip_tos = IPTOS_LOWDELAY; 1678127145Smlaier#ifdef __FreeBSD__ 1679130613Smlaier h->ip_off = path_mtu_discovery ? IP_DF : 0; 1680130613Smlaier h->ip_len = len; 1681126261Smlaier#else 1682126261Smlaier h->ip_off = htons(ip_mtudisc ? IP_DF : 0); 1683130613Smlaier h->ip_len = htons(len); 1684126261Smlaier#endif 1685126258Smlaier h->ip_ttl = ttl ? ttl : ip_defttl; 1686126258Smlaier h->ip_sum = 0; 1687145836Smlaier if (eh == NULL) { 1688127145Smlaier#ifdef __FreeBSD__ 1689145836Smlaier PF_UNLOCK(); 1690145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1691145836Smlaier (void *)NULL, (void *)NULL); 1692145836Smlaier PF_LOCK(); 1693126261Smlaier#else /* ! __FreeBSD__ */ 1694145836Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, 1695145836Smlaier (void *)NULL, (void *)NULL); 1696126261Smlaier#endif 1697145836Smlaier } else { 1698145836Smlaier struct route ro; 1699145836Smlaier struct rtentry rt; 1700145836Smlaier struct ether_header *e = (void *)ro.ro_dst.sa_data; 1701145836Smlaier 1702145836Smlaier if (ifp == NULL) { 1703145836Smlaier m_freem(m); 1704145836Smlaier return; 1705145836Smlaier } 1706145836Smlaier rt.rt_ifp = ifp; 1707145836Smlaier ro.ro_rt = &rt; 1708145836Smlaier ro.ro_dst.sa_len = sizeof(ro.ro_dst); 1709145836Smlaier ro.ro_dst.sa_family = pseudo_AF_HDRCMPLT; 1710145836Smlaier bcopy(eh->ether_dhost, e->ether_shost, ETHER_ADDR_LEN); 1711145836Smlaier bcopy(eh->ether_shost, e->ether_dhost, ETHER_ADDR_LEN); 1712145836Smlaier e->ether_type = eh->ether_type; 1713145836Smlaier#ifdef __FreeBSD__ 1714145836Smlaier PF_UNLOCK(); 1715145836Smlaier /* XXX_IMPORT: later */ 1716145836Smlaier ip_output(m, (void *)NULL, &ro, 0, 1717145836Smlaier (void *)NULL, (void *)NULL); 1718145836Smlaier PF_LOCK(); 1719145836Smlaier#else /* ! __FreeBSD__ */ 1720145836Smlaier ip_output(m, (void *)NULL, &ro, IP_ROUTETOETHER, 1721145836Smlaier (void *)NULL, (void *)NULL); 1722145836Smlaier#endif 1723145836Smlaier } 1724126258Smlaier break; 1725126258Smlaier#endif /* INET */ 1726126258Smlaier#ifdef INET6 1727126258Smlaier case AF_INET6: 1728126258Smlaier /* TCP checksum */ 1729126258Smlaier th->th_sum = in6_cksum(m, IPPROTO_TCP, 1730126258Smlaier sizeof(struct ip6_hdr), tlen); 1731126258Smlaier 1732126258Smlaier h6->ip6_vfc |= IPV6_VERSION; 1733126258Smlaier h6->ip6_hlim = IPV6_DEFHLIM; 1734126258Smlaier 1735127145Smlaier#ifdef __FreeBSD__ 1736126261Smlaier PF_UNLOCK(); 1737126261Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL); 1738126261Smlaier PF_LOCK(); 1739126261Smlaier#else 1740126258Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL); 1741126261Smlaier#endif 1742126258Smlaier break; 1743126258Smlaier#endif /* INET6 */ 1744126258Smlaier } 1745126258Smlaier} 1746126258Smlaier 1747126258Smlaiervoid 1748126258Smlaierpf_send_icmp(struct mbuf *m, u_int8_t type, u_int8_t code, sa_family_t af, 1749126258Smlaier struct pf_rule *r) 1750126258Smlaier{ 1751132280Smlaier#ifdef ALTQ 1752126258Smlaier struct m_tag *mtag; 1753132280Smlaier#endif 1754126258Smlaier struct mbuf *m0; 1755127145Smlaier#ifdef __FreeBSD__ 1756126261Smlaier struct ip *ip; 1757126261Smlaier#endif 1758126258Smlaier 1759132280Smlaier#ifdef __FreeBSD__ 1760132280Smlaier m0 = m_copypacket(m, M_DONTWAIT); 1761132280Smlaier if (m0 == NULL) 1762132280Smlaier return; 1763132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 1764132280Smlaier#else 1765126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1766126258Smlaier if (mtag == NULL) 1767126258Smlaier return; 1768126258Smlaier m0 = m_copy(m, 0, M_COPYALL); 1769126258Smlaier if (m0 == NULL) { 1770126258Smlaier m_tag_free(mtag); 1771126258Smlaier return; 1772126258Smlaier } 1773126258Smlaier m_tag_prepend(m0, mtag); 1774132280Smlaier#endif 1775126258Smlaier 1776126258Smlaier#ifdef ALTQ 1777126258Smlaier if (r->qid) { 1778126258Smlaier struct altq_tag *atag; 1779126258Smlaier 1780126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1781126258Smlaier if (mtag != NULL) { 1782126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1783126258Smlaier atag->qid = r->qid; 1784126258Smlaier /* add hints for ecn */ 1785126258Smlaier atag->af = af; 1786126258Smlaier atag->hdr = mtod(m0, struct ip *); 1787126258Smlaier m_tag_prepend(m0, mtag); 1788126258Smlaier } 1789126258Smlaier } 1790145836Smlaier#endif /* ALTQ */ 1791126258Smlaier 1792126258Smlaier switch (af) { 1793126258Smlaier#ifdef INET 1794126258Smlaier case AF_INET: 1795127145Smlaier#ifdef __FreeBSD__ 1796126261Smlaier /* icmp_error() expects host byte ordering */ 1797126261Smlaier ip = mtod(m0, struct ip *); 1798126261Smlaier NTOHS(ip->ip_len); 1799126261Smlaier NTOHS(ip->ip_off); 1800126261Smlaier PF_UNLOCK(); 1801145863Sandre icmp_error(m0, type, code, 0, 0); 1802126261Smlaier PF_LOCK(); 1803145874Smlaier#else 1804145874Smlaier icmp_error(m0, type, code, 0, (void *)NULL); 1805126261Smlaier#endif 1806126258Smlaier break; 1807126258Smlaier#endif /* INET */ 1808126258Smlaier#ifdef INET6 1809126258Smlaier case AF_INET6: 1810127145Smlaier#ifdef __FreeBSD__ 1811126261Smlaier PF_UNLOCK(); 1812126261Smlaier#endif 1813126258Smlaier icmp6_error(m0, type, code, 0); 1814127145Smlaier#ifdef __FreeBSD__ 1815126261Smlaier PF_LOCK(); 1816126261Smlaier#endif 1817126258Smlaier break; 1818126258Smlaier#endif /* INET6 */ 1819126258Smlaier } 1820126258Smlaier} 1821126258Smlaier 1822126258Smlaier/* 1823126258Smlaier * Return 1 if the addresses a and b match (with mask m), otherwise return 0. 1824126258Smlaier * If n is 0, they match if they are equal. If n is != 0, they match if they 1825126258Smlaier * are different. 1826126258Smlaier */ 1827126258Smlaierint 1828126258Smlaierpf_match_addr(u_int8_t n, struct pf_addr *a, struct pf_addr *m, 1829126258Smlaier struct pf_addr *b, sa_family_t af) 1830126258Smlaier{ 1831126258Smlaier int match = 0; 1832126258Smlaier 1833126258Smlaier switch (af) { 1834126258Smlaier#ifdef INET 1835126258Smlaier case AF_INET: 1836126258Smlaier if ((a->addr32[0] & m->addr32[0]) == 1837126258Smlaier (b->addr32[0] & m->addr32[0])) 1838126258Smlaier match++; 1839126258Smlaier break; 1840126258Smlaier#endif /* INET */ 1841126258Smlaier#ifdef INET6 1842126258Smlaier case AF_INET6: 1843126258Smlaier if (((a->addr32[0] & m->addr32[0]) == 1844126258Smlaier (b->addr32[0] & m->addr32[0])) && 1845126258Smlaier ((a->addr32[1] & m->addr32[1]) == 1846126258Smlaier (b->addr32[1] & m->addr32[1])) && 1847126258Smlaier ((a->addr32[2] & m->addr32[2]) == 1848126258Smlaier (b->addr32[2] & m->addr32[2])) && 1849126258Smlaier ((a->addr32[3] & m->addr32[3]) == 1850126258Smlaier (b->addr32[3] & m->addr32[3]))) 1851126258Smlaier match++; 1852126258Smlaier break; 1853126258Smlaier#endif /* INET6 */ 1854126258Smlaier } 1855126258Smlaier if (match) { 1856126258Smlaier if (n) 1857126258Smlaier return (0); 1858126258Smlaier else 1859126258Smlaier return (1); 1860126258Smlaier } else { 1861126258Smlaier if (n) 1862126258Smlaier return (1); 1863126258Smlaier else 1864126258Smlaier return (0); 1865126258Smlaier } 1866126258Smlaier} 1867126258Smlaier 1868126258Smlaierint 1869126258Smlaierpf_match(u_int8_t op, u_int32_t a1, u_int32_t a2, u_int32_t p) 1870126258Smlaier{ 1871126258Smlaier switch (op) { 1872126258Smlaier case PF_OP_IRG: 1873126258Smlaier return ((p > a1) && (p < a2)); 1874126258Smlaier case PF_OP_XRG: 1875126258Smlaier return ((p < a1) || (p > a2)); 1876126258Smlaier case PF_OP_RRG: 1877126258Smlaier return ((p >= a1) && (p <= a2)); 1878126258Smlaier case PF_OP_EQ: 1879126258Smlaier return (p == a1); 1880126258Smlaier case PF_OP_NE: 1881126258Smlaier return (p != a1); 1882126258Smlaier case PF_OP_LT: 1883126258Smlaier return (p < a1); 1884126258Smlaier case PF_OP_LE: 1885126258Smlaier return (p <= a1); 1886126258Smlaier case PF_OP_GT: 1887126258Smlaier return (p > a1); 1888126258Smlaier case PF_OP_GE: 1889126258Smlaier return (p >= a1); 1890126258Smlaier } 1891126258Smlaier return (0); /* never reached */ 1892126258Smlaier} 1893126258Smlaier 1894126258Smlaierint 1895126258Smlaierpf_match_port(u_int8_t op, u_int16_t a1, u_int16_t a2, u_int16_t p) 1896126258Smlaier{ 1897126258Smlaier NTOHS(a1); 1898126258Smlaier NTOHS(a2); 1899126258Smlaier NTOHS(p); 1900126258Smlaier return (pf_match(op, a1, a2, p)); 1901126258Smlaier} 1902126258Smlaier 1903126258Smlaierint 1904126258Smlaierpf_match_uid(u_int8_t op, uid_t a1, uid_t a2, uid_t u) 1905126258Smlaier{ 1906126258Smlaier if (u == UID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1907126258Smlaier return (0); 1908126258Smlaier return (pf_match(op, a1, a2, u)); 1909126258Smlaier} 1910126258Smlaier 1911126258Smlaierint 1912126258Smlaierpf_match_gid(u_int8_t op, gid_t a1, gid_t a2, gid_t g) 1913126258Smlaier{ 1914126258Smlaier if (g == GID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1915126258Smlaier return (0); 1916126258Smlaier return (pf_match(op, a1, a2, g)); 1917126258Smlaier} 1918126258Smlaier 1919126258Smlaierstruct pf_tag * 1920126258Smlaierpf_get_tag(struct mbuf *m) 1921126258Smlaier{ 1922126258Smlaier struct m_tag *mtag; 1923126258Smlaier 1924126258Smlaier if ((mtag = m_tag_find(m, PACKET_TAG_PF_TAG, NULL)) != NULL) 1925126258Smlaier return ((struct pf_tag *)(mtag + 1)); 1926126258Smlaier else 1927126258Smlaier return (NULL); 1928126258Smlaier} 1929126258Smlaier 1930126258Smlaierint 1931145836Smlaierpf_match_tag(struct mbuf *m, struct pf_rule *r, struct pf_tag **pftag, int *tag) 1932126258Smlaier{ 1933126258Smlaier if (*tag == -1) { /* find mbuf tag */ 1934145836Smlaier *pftag = pf_get_tag(m); 1935145836Smlaier if (*pftag != NULL) 1936145836Smlaier *tag = (*pftag)->tag; 1937126258Smlaier else 1938126258Smlaier *tag = 0; 1939126258Smlaier } 1940126258Smlaier 1941126258Smlaier return ((!r->match_tag_not && r->match_tag == *tag) || 1942126258Smlaier (r->match_tag_not && r->match_tag != *tag)); 1943126258Smlaier} 1944126258Smlaier 1945126258Smlaierint 1946126258Smlaierpf_tag_packet(struct mbuf *m, struct pf_tag *pftag, int tag) 1947126258Smlaier{ 1948126258Smlaier struct m_tag *mtag; 1949126258Smlaier 1950126258Smlaier if (tag <= 0) 1951126258Smlaier return (0); 1952126258Smlaier 1953126258Smlaier if (pftag == NULL) { 1954126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_TAG, sizeof(*pftag), M_NOWAIT); 1955126258Smlaier if (mtag == NULL) 1956126258Smlaier return (1); 1957126258Smlaier ((struct pf_tag *)(mtag + 1))->tag = tag; 1958126258Smlaier m_tag_prepend(m, mtag); 1959126258Smlaier } else 1960126258Smlaier pftag->tag = tag; 1961126258Smlaier 1962126258Smlaier return (0); 1963126258Smlaier} 1964126258Smlaier 1965145836Smlaierstatic void 1966145836Smlaierpf_step_into_anchor(int *depth, struct pf_ruleset **rs, int n, 1967145836Smlaier struct pf_rule **r, struct pf_rule **a) 1968145836Smlaier{ 1969145836Smlaier struct pf_anchor_stackframe *f; 1970126258Smlaier 1971145836Smlaier if (*depth >= sizeof(pf_anchor_stack) / 1972145836Smlaier sizeof(pf_anchor_stack[0])) { 1973145836Smlaier printf("pf_step_into_anchor: stack overflow\n"); 1974145836Smlaier *r = TAILQ_NEXT(*r, entries); 1975145836Smlaier return; 1976145836Smlaier } else if (*depth == 0 && a != NULL) 1977145836Smlaier *a = *r; 1978145836Smlaier f = pf_anchor_stack + (*depth)++; 1979145836Smlaier f->rs = *rs; 1980145836Smlaier f->r = *r; 1981145836Smlaier if ((*r)->anchor_wildcard) { 1982145836Smlaier f->parent = &(*r)->anchor->children; 1983145836Smlaier if ((f->child = RB_MIN(pf_anchor_node, f->parent)) == 1984145836Smlaier NULL) { 1985145836Smlaier *r = NULL; 1986145836Smlaier return; 1987145836Smlaier } 1988145836Smlaier *rs = &f->child->ruleset; 1989145836Smlaier } else { 1990145836Smlaier f->parent = NULL; 1991145836Smlaier f->child = NULL; 1992145836Smlaier *rs = &(*r)->anchor->ruleset; 1993145836Smlaier } 1994145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 1995145836Smlaier} 1996126258Smlaier 1997145836Smlaierstatic void 1998145836Smlaierpf_step_out_of_anchor(int *depth, struct pf_ruleset **rs, int n, 1999145836Smlaier struct pf_rule **r, struct pf_rule **a) 2000145836Smlaier{ 2001145836Smlaier struct pf_anchor_stackframe *f; 2002145836Smlaier 2003145836Smlaier do { 2004145836Smlaier if (*depth <= 0) 2005145836Smlaier break; 2006145836Smlaier f = pf_anchor_stack + *depth - 1; 2007145836Smlaier if (f->parent != NULL && f->child != NULL) { 2008145836Smlaier f->child = RB_NEXT(pf_anchor_node, f->parent, f->child); 2009145836Smlaier if (f->child != NULL) { 2010145836Smlaier *rs = &f->child->ruleset; 2011145836Smlaier *r = TAILQ_FIRST((*rs)->rules[n].active.ptr); 2012145836Smlaier if (*r == NULL) 2013145836Smlaier continue; 2014145836Smlaier else 2015145836Smlaier break; 2016145836Smlaier } 2017145836Smlaier } 2018145836Smlaier (*depth)--; 2019145836Smlaier if (*depth == 0 && a != NULL) 2020145836Smlaier *a = NULL; 2021145836Smlaier *rs = f->rs; 2022145836Smlaier *r = TAILQ_NEXT(f->r, entries); 2023145836Smlaier } while (*r == NULL); 2024145836Smlaier} 2025145836Smlaier 2026126258Smlaier#ifdef INET6 2027126258Smlaiervoid 2028126258Smlaierpf_poolmask(struct pf_addr *naddr, struct pf_addr *raddr, 2029126258Smlaier struct pf_addr *rmask, struct pf_addr *saddr, sa_family_t af) 2030126258Smlaier{ 2031126258Smlaier switch (af) { 2032126258Smlaier#ifdef INET 2033126258Smlaier case AF_INET: 2034126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2035126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2036126258Smlaier break; 2037126258Smlaier#endif /* INET */ 2038126258Smlaier case AF_INET6: 2039126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 2040126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 2041126258Smlaier naddr->addr32[1] = (raddr->addr32[1] & rmask->addr32[1]) | 2042126258Smlaier ((rmask->addr32[1] ^ 0xffffffff ) & saddr->addr32[1]); 2043126258Smlaier naddr->addr32[2] = (raddr->addr32[2] & rmask->addr32[2]) | 2044126258Smlaier ((rmask->addr32[2] ^ 0xffffffff ) & saddr->addr32[2]); 2045126258Smlaier naddr->addr32[3] = (raddr->addr32[3] & rmask->addr32[3]) | 2046126258Smlaier ((rmask->addr32[3] ^ 0xffffffff ) & saddr->addr32[3]); 2047126258Smlaier break; 2048126258Smlaier } 2049126258Smlaier} 2050126258Smlaier 2051126258Smlaiervoid 2052130613Smlaierpf_addr_inc(struct pf_addr *addr, sa_family_t af) 2053126258Smlaier{ 2054126258Smlaier switch (af) { 2055126258Smlaier#ifdef INET 2056126258Smlaier case AF_INET: 2057126258Smlaier addr->addr32[0] = htonl(ntohl(addr->addr32[0]) + 1); 2058126258Smlaier break; 2059126258Smlaier#endif /* INET */ 2060126258Smlaier case AF_INET6: 2061126258Smlaier if (addr->addr32[3] == 0xffffffff) { 2062126258Smlaier addr->addr32[3] = 0; 2063126258Smlaier if (addr->addr32[2] == 0xffffffff) { 2064126258Smlaier addr->addr32[2] = 0; 2065126258Smlaier if (addr->addr32[1] == 0xffffffff) { 2066126258Smlaier addr->addr32[1] = 0; 2067126258Smlaier addr->addr32[0] = 2068126258Smlaier htonl(ntohl(addr->addr32[0]) + 1); 2069126258Smlaier } else 2070126258Smlaier addr->addr32[1] = 2071126258Smlaier htonl(ntohl(addr->addr32[1]) + 1); 2072126258Smlaier } else 2073126258Smlaier addr->addr32[2] = 2074126258Smlaier htonl(ntohl(addr->addr32[2]) + 1); 2075126258Smlaier } else 2076126258Smlaier addr->addr32[3] = 2077126258Smlaier htonl(ntohl(addr->addr32[3]) + 1); 2078126258Smlaier break; 2079126258Smlaier } 2080126258Smlaier} 2081126258Smlaier#endif /* INET6 */ 2082126258Smlaier 2083126258Smlaier#define mix(a,b,c) \ 2084126258Smlaier do { \ 2085126258Smlaier a -= b; a -= c; a ^= (c >> 13); \ 2086126258Smlaier b -= c; b -= a; b ^= (a << 8); \ 2087126258Smlaier c -= a; c -= b; c ^= (b >> 13); \ 2088126258Smlaier a -= b; a -= c; a ^= (c >> 12); \ 2089126258Smlaier b -= c; b -= a; b ^= (a << 16); \ 2090126258Smlaier c -= a; c -= b; c ^= (b >> 5); \ 2091126258Smlaier a -= b; a -= c; a ^= (c >> 3); \ 2092126258Smlaier b -= c; b -= a; b ^= (a << 10); \ 2093126258Smlaier c -= a; c -= b; c ^= (b >> 15); \ 2094126258Smlaier } while (0) 2095126258Smlaier 2096126258Smlaier/* 2097126258Smlaier * hash function based on bridge_hash in if_bridge.c 2098126258Smlaier */ 2099126258Smlaiervoid 2100126258Smlaierpf_hash(struct pf_addr *inaddr, struct pf_addr *hash, 2101126258Smlaier struct pf_poolhashkey *key, sa_family_t af) 2102126258Smlaier{ 2103126258Smlaier u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0]; 2104126258Smlaier 2105126258Smlaier switch (af) { 2106126258Smlaier#ifdef INET 2107126258Smlaier case AF_INET: 2108126258Smlaier a += inaddr->addr32[0]; 2109126258Smlaier b += key->key32[1]; 2110126258Smlaier mix(a, b, c); 2111126258Smlaier hash->addr32[0] = c + key->key32[2]; 2112126258Smlaier break; 2113126258Smlaier#endif /* INET */ 2114126258Smlaier#ifdef INET6 2115126258Smlaier case AF_INET6: 2116126258Smlaier a += inaddr->addr32[0]; 2117126258Smlaier b += inaddr->addr32[2]; 2118126258Smlaier mix(a, b, c); 2119126258Smlaier hash->addr32[0] = c; 2120126258Smlaier a += inaddr->addr32[1]; 2121126258Smlaier b += inaddr->addr32[3]; 2122126258Smlaier c += key->key32[1]; 2123126258Smlaier mix(a, b, c); 2124126258Smlaier hash->addr32[1] = c; 2125126258Smlaier a += inaddr->addr32[2]; 2126126258Smlaier b += inaddr->addr32[1]; 2127126258Smlaier c += key->key32[2]; 2128126258Smlaier mix(a, b, c); 2129126258Smlaier hash->addr32[2] = c; 2130126258Smlaier a += inaddr->addr32[3]; 2131126258Smlaier b += inaddr->addr32[0]; 2132126258Smlaier c += key->key32[3]; 2133126258Smlaier mix(a, b, c); 2134126258Smlaier hash->addr32[3] = c; 2135126258Smlaier break; 2136126258Smlaier#endif /* INET6 */ 2137126258Smlaier } 2138126258Smlaier} 2139126258Smlaier 2140126258Smlaierint 2141130613Smlaierpf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr, 2142130613Smlaier struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn) 2143126258Smlaier{ 2144126258Smlaier unsigned char hash[16]; 2145130613Smlaier struct pf_pool *rpool = &r->rpool; 2146130613Smlaier struct pf_addr *raddr = &rpool->cur->addr.v.a.addr; 2147130613Smlaier struct pf_addr *rmask = &rpool->cur->addr.v.a.mask; 2148126258Smlaier struct pf_pooladdr *acur = rpool->cur; 2149130613Smlaier struct pf_src_node k; 2150126258Smlaier 2151130613Smlaier if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR && 2152130613Smlaier (r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2153130613Smlaier k.af = af; 2154130613Smlaier PF_ACPY(&k.addr, saddr, af); 2155130613Smlaier if (r->rule_flag & PFRULE_RULESRCTRACK || 2156130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) 2157130613Smlaier k.rule.ptr = r; 2158130613Smlaier else 2159130613Smlaier k.rule.ptr = NULL; 2160130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 2161130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 2162130613Smlaier if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) { 2163130613Smlaier PF_ACPY(naddr, &(*sn)->raddr, af); 2164130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 2165130613Smlaier printf("pf_map_addr: src tracking maps "); 2166130613Smlaier pf_print_host(&k.addr, 0, af); 2167130613Smlaier printf(" to "); 2168130613Smlaier pf_print_host(naddr, 0, af); 2169130613Smlaier printf("\n"); 2170130613Smlaier } 2171130613Smlaier return (0); 2172130613Smlaier } 2173130613Smlaier } 2174130613Smlaier 2175126258Smlaier if (rpool->cur->addr.type == PF_ADDR_NOROUTE) 2176126258Smlaier return (1); 2177130613Smlaier if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2178145836Smlaier switch (af) { 2179145836Smlaier#ifdef INET 2180145836Smlaier case AF_INET: 2181130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 && 2182130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2183130613Smlaier PF_POOL_ROUNDROBIN) 2184130613Smlaier return (1); 2185130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr4; 2186130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask4; 2187145836Smlaier break; 2188145836Smlaier#endif /* INET */ 2189145836Smlaier#ifdef INET6 2190145836Smlaier case AF_INET6: 2191130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 && 2192130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 2193130613Smlaier PF_POOL_ROUNDROBIN) 2194130613Smlaier return (1); 2195130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr6; 2196130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask6; 2197145836Smlaier break; 2198145836Smlaier#endif /* INET6 */ 2199130613Smlaier } 2200130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2201126258Smlaier if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN) 2202126258Smlaier return (1); /* unsupported */ 2203126258Smlaier } else { 2204126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2205126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2206126258Smlaier } 2207126258Smlaier 2208126258Smlaier switch (rpool->opts & PF_POOL_TYPEMASK) { 2209126258Smlaier case PF_POOL_NONE: 2210126258Smlaier PF_ACPY(naddr, raddr, af); 2211126258Smlaier break; 2212126258Smlaier case PF_POOL_BITMASK: 2213126258Smlaier PF_POOLMASK(naddr, raddr, rmask, saddr, af); 2214126258Smlaier break; 2215126258Smlaier case PF_POOL_RANDOM: 2216126258Smlaier if (init_addr != NULL && PF_AZERO(init_addr, af)) { 2217126258Smlaier switch (af) { 2218126258Smlaier#ifdef INET 2219126258Smlaier case AF_INET: 2220145836Smlaier rpool->counter.addr32[0] = htonl(arc4random()); 2221126258Smlaier break; 2222126258Smlaier#endif /* INET */ 2223126258Smlaier#ifdef INET6 2224126258Smlaier case AF_INET6: 2225126258Smlaier if (rmask->addr32[3] != 0xffffffff) 2226145836Smlaier rpool->counter.addr32[3] = 2227145836Smlaier htonl(arc4random()); 2228126258Smlaier else 2229126258Smlaier break; 2230126258Smlaier if (rmask->addr32[2] != 0xffffffff) 2231145836Smlaier rpool->counter.addr32[2] = 2232145836Smlaier htonl(arc4random()); 2233126258Smlaier else 2234126258Smlaier break; 2235126258Smlaier if (rmask->addr32[1] != 0xffffffff) 2236145836Smlaier rpool->counter.addr32[1] = 2237145836Smlaier htonl(arc4random()); 2238126258Smlaier else 2239126258Smlaier break; 2240126258Smlaier if (rmask->addr32[0] != 0xffffffff) 2241145836Smlaier rpool->counter.addr32[0] = 2242145836Smlaier htonl(arc4random()); 2243126258Smlaier break; 2244126258Smlaier#endif /* INET6 */ 2245126258Smlaier } 2246126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2247126258Smlaier PF_ACPY(init_addr, naddr, af); 2248126258Smlaier 2249126258Smlaier } else { 2250126258Smlaier PF_AINC(&rpool->counter, af); 2251126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2252126258Smlaier } 2253126258Smlaier break; 2254126258Smlaier case PF_POOL_SRCHASH: 2255126258Smlaier pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af); 2256126258Smlaier PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af); 2257126258Smlaier break; 2258126258Smlaier case PF_POOL_ROUNDROBIN: 2259126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2260126258Smlaier if (!pfr_pool_get(rpool->cur->addr.p.tbl, 2261126258Smlaier &rpool->tblidx, &rpool->counter, 2262126258Smlaier &raddr, &rmask, af)) 2263126258Smlaier goto get_addr; 2264130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2265130613Smlaier if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2266130613Smlaier &rpool->tblidx, &rpool->counter, 2267130613Smlaier &raddr, &rmask, af)) 2268130613Smlaier goto get_addr; 2269126258Smlaier } else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af)) 2270126258Smlaier goto get_addr; 2271126258Smlaier 2272126258Smlaier try_next: 2273126258Smlaier if ((rpool->cur = TAILQ_NEXT(rpool->cur, entries)) == NULL) 2274126258Smlaier rpool->cur = TAILQ_FIRST(&rpool->list); 2275126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2276126258Smlaier rpool->tblidx = -1; 2277126258Smlaier if (pfr_pool_get(rpool->cur->addr.p.tbl, 2278126258Smlaier &rpool->tblidx, &rpool->counter, 2279126258Smlaier &raddr, &rmask, af)) { 2280130613Smlaier /* table contains no address of type 'af' */ 2281126258Smlaier if (rpool->cur != acur) 2282126258Smlaier goto try_next; 2283126258Smlaier return (1); 2284126258Smlaier } 2285130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2286130613Smlaier rpool->tblidx = -1; 2287130613Smlaier if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2288130613Smlaier &rpool->tblidx, &rpool->counter, 2289130613Smlaier &raddr, &rmask, af)) { 2290130613Smlaier /* table contains no address of type 'af' */ 2291130613Smlaier if (rpool->cur != acur) 2292130613Smlaier goto try_next; 2293130613Smlaier return (1); 2294130613Smlaier } 2295126258Smlaier } else { 2296126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2297126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2298126258Smlaier PF_ACPY(&rpool->counter, raddr, af); 2299126258Smlaier } 2300126258Smlaier 2301126258Smlaier get_addr: 2302126258Smlaier PF_ACPY(naddr, &rpool->counter, af); 2303139045Sdhartmei if (init_addr != NULL && PF_AZERO(init_addr, af)) 2304139045Sdhartmei PF_ACPY(init_addr, naddr, af); 2305126258Smlaier PF_AINC(&rpool->counter, af); 2306126258Smlaier break; 2307126258Smlaier } 2308130613Smlaier if (*sn != NULL) 2309130613Smlaier PF_ACPY(&(*sn)->raddr, naddr, af); 2310126258Smlaier 2311126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC && 2312126258Smlaier (rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2313130613Smlaier printf("pf_map_addr: selected address "); 2314126258Smlaier pf_print_host(naddr, 0, af); 2315126258Smlaier printf("\n"); 2316126258Smlaier } 2317126258Smlaier 2318126258Smlaier return (0); 2319126258Smlaier} 2320126258Smlaier 2321126258Smlaierint 2322130613Smlaierpf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r, 2323126258Smlaier struct pf_addr *saddr, struct pf_addr *daddr, u_int16_t dport, 2324130613Smlaier struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high, 2325130613Smlaier struct pf_src_node **sn) 2326126258Smlaier{ 2327130613Smlaier struct pf_state key; 2328126258Smlaier struct pf_addr init_addr; 2329126258Smlaier u_int16_t cut; 2330126258Smlaier 2331126258Smlaier bzero(&init_addr, sizeof(init_addr)); 2332130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2333126258Smlaier return (1); 2334126258Smlaier 2335126258Smlaier do { 2336126258Smlaier key.af = af; 2337126258Smlaier key.proto = proto; 2338130613Smlaier PF_ACPY(&key.ext.addr, daddr, key.af); 2339130613Smlaier PF_ACPY(&key.gwy.addr, naddr, key.af); 2340130613Smlaier key.ext.port = dport; 2341126258Smlaier 2342126258Smlaier /* 2343126258Smlaier * port search; start random, step; 2344126258Smlaier * similar 2 portloop in in_pcbbind 2345126258Smlaier */ 2346126258Smlaier if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP)) { 2347139045Sdhartmei key.gwy.port = dport; 2348130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2349126258Smlaier return (0); 2350126258Smlaier } else if (low == 0 && high == 0) { 2351130613Smlaier key.gwy.port = *nport; 2352130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2353126258Smlaier return (0); 2354126258Smlaier } else if (low == high) { 2355130613Smlaier key.gwy.port = htons(low); 2356130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) { 2357126258Smlaier *nport = htons(low); 2358126258Smlaier return (0); 2359126258Smlaier } 2360126258Smlaier } else { 2361126258Smlaier u_int16_t tmp; 2362126258Smlaier 2363126258Smlaier if (low > high) { 2364126258Smlaier tmp = low; 2365126258Smlaier low = high; 2366126258Smlaier high = tmp; 2367126258Smlaier } 2368126258Smlaier /* low < high */ 2369145836Smlaier cut = htonl(arc4random()) % (1 + high - low) + low; 2370126258Smlaier /* low <= cut <= high */ 2371126258Smlaier for (tmp = cut; tmp <= high; ++(tmp)) { 2372130613Smlaier key.gwy.port = htons(tmp); 2373130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2374126258Smlaier NULL) { 2375126258Smlaier *nport = htons(tmp); 2376126258Smlaier return (0); 2377126258Smlaier } 2378126258Smlaier } 2379126258Smlaier for (tmp = cut - 1; tmp >= low; --(tmp)) { 2380130613Smlaier key.gwy.port = htons(tmp); 2381130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2382126258Smlaier NULL) { 2383126258Smlaier *nport = htons(tmp); 2384126258Smlaier return (0); 2385126258Smlaier } 2386126258Smlaier } 2387126258Smlaier } 2388126258Smlaier 2389130613Smlaier switch (r->rpool.opts & PF_POOL_TYPEMASK) { 2390126258Smlaier case PF_POOL_RANDOM: 2391126258Smlaier case PF_POOL_ROUNDROBIN: 2392130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2393126258Smlaier return (1); 2394126258Smlaier break; 2395126258Smlaier case PF_POOL_NONE: 2396126258Smlaier case PF_POOL_SRCHASH: 2397126258Smlaier case PF_POOL_BITMASK: 2398126258Smlaier default: 2399126258Smlaier return (1); 2400126258Smlaier } 2401126258Smlaier } while (! PF_AEQ(&init_addr, naddr, af) ); 2402126258Smlaier 2403126258Smlaier return (1); /* none available */ 2404126258Smlaier} 2405126258Smlaier 2406126258Smlaierstruct pf_rule * 2407126258Smlaierpf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off, 2408130613Smlaier int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport, 2409126258Smlaier struct pf_addr *daddr, u_int16_t dport, int rs_num) 2410126258Smlaier{ 2411145836Smlaier struct pf_rule *r, *rm = NULL; 2412126258Smlaier struct pf_ruleset *ruleset = NULL; 2413145836Smlaier struct pf_tag *pftag = NULL; 2414145836Smlaier int tag = -1; 2415145836Smlaier int asd = 0; 2416126258Smlaier 2417126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr); 2418126258Smlaier while (r && rm == NULL) { 2419126258Smlaier struct pf_rule_addr *src = NULL, *dst = NULL; 2420126258Smlaier struct pf_addr_wrap *xdst = NULL; 2421126258Smlaier 2422126258Smlaier if (r->action == PF_BINAT && direction == PF_IN) { 2423126258Smlaier src = &r->dst; 2424126258Smlaier if (r->rpool.cur != NULL) 2425126258Smlaier xdst = &r->rpool.cur->addr; 2426126258Smlaier } else { 2427126258Smlaier src = &r->src; 2428126258Smlaier dst = &r->dst; 2429126258Smlaier } 2430126258Smlaier 2431126258Smlaier r->evaluations++; 2432130613Smlaier if (r->kif != NULL && 2433130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 2434126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 2435126258Smlaier else if (r->direction && r->direction != direction) 2436126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 2437126258Smlaier else if (r->af && r->af != pd->af) 2438126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 2439126258Smlaier else if (r->proto && r->proto != pd->proto) 2440126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 2441145836Smlaier else if (PF_MISMATCHAW(&src->addr, saddr, pd->af, src->neg)) 2442126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR : 2443126258Smlaier PF_SKIP_DST_ADDR].ptr; 2444126258Smlaier else if (src->port_op && !pf_match_port(src->port_op, 2445126258Smlaier src->port[0], src->port[1], sport)) 2446126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT : 2447126258Smlaier PF_SKIP_DST_PORT].ptr; 2448126258Smlaier else if (dst != NULL && 2449145836Smlaier PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->neg)) 2450126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 2451126258Smlaier else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af, 0)) 2452126258Smlaier r = TAILQ_NEXT(r, entries); 2453126258Smlaier else if (dst != NULL && dst->port_op && 2454126258Smlaier !pf_match_port(dst->port_op, dst->port[0], 2455126258Smlaier dst->port[1], dport)) 2456126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 2457145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 2458145836Smlaier r = TAILQ_NEXT(r, entries); 2459126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto != 2460126258Smlaier IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m, 2461126258Smlaier off, pd->hdr.tcp), r->os_fingerprint))) 2462126258Smlaier r = TAILQ_NEXT(r, entries); 2463145836Smlaier else { 2464145836Smlaier if (r->tag) 2465145836Smlaier tag = r->tag; 2466145836Smlaier if (r->anchor == NULL) { 2467126258Smlaier rm = r; 2468145836Smlaier } else 2469145836Smlaier pf_step_into_anchor(&asd, &ruleset, rs_num, &r, NULL); 2470145836Smlaier } 2471145836Smlaier if (r == NULL) 2472145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, rs_num, &r, NULL); 2473126258Smlaier } 2474145836Smlaier if (pf_tag_packet(m, pftag, tag)) 2475145836Smlaier return (NULL); 2476126258Smlaier if (rm != NULL && (rm->action == PF_NONAT || 2477126258Smlaier rm->action == PF_NORDR || rm->action == PF_NOBINAT)) 2478126258Smlaier return (NULL); 2479126258Smlaier return (rm); 2480126258Smlaier} 2481126258Smlaier 2482126258Smlaierstruct pf_rule * 2483126258Smlaierpf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction, 2484130613Smlaier struct pfi_kif *kif, struct pf_src_node **sn, 2485126258Smlaier struct pf_addr *saddr, u_int16_t sport, 2486126258Smlaier struct pf_addr *daddr, u_int16_t dport, 2487126258Smlaier struct pf_addr *naddr, u_int16_t *nport) 2488126258Smlaier{ 2489126258Smlaier struct pf_rule *r = NULL; 2490126258Smlaier 2491126258Smlaier if (direction == PF_OUT) { 2492130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2493126258Smlaier sport, daddr, dport, PF_RULESET_BINAT); 2494126258Smlaier if (r == NULL) 2495130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2496126258Smlaier saddr, sport, daddr, dport, PF_RULESET_NAT); 2497126258Smlaier } else { 2498130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2499126258Smlaier sport, daddr, dport, PF_RULESET_RDR); 2500126258Smlaier if (r == NULL) 2501130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2502126258Smlaier saddr, sport, daddr, dport, PF_RULESET_BINAT); 2503126258Smlaier } 2504126258Smlaier 2505126258Smlaier if (r != NULL) { 2506126258Smlaier switch (r->action) { 2507126258Smlaier case PF_NONAT: 2508126258Smlaier case PF_NOBINAT: 2509126258Smlaier case PF_NORDR: 2510126258Smlaier return (NULL); 2511126258Smlaier case PF_NAT: 2512130613Smlaier if (pf_get_sport(pd->af, pd->proto, r, saddr, 2513126258Smlaier daddr, dport, naddr, nport, r->rpool.proxy_port[0], 2514130613Smlaier r->rpool.proxy_port[1], sn)) { 2515126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 2516126258Smlaier ("pf: NAT proxy port allocation " 2517126258Smlaier "(%u-%u) failed\n", 2518126258Smlaier r->rpool.proxy_port[0], 2519126258Smlaier r->rpool.proxy_port[1])); 2520126258Smlaier return (NULL); 2521126258Smlaier } 2522126258Smlaier break; 2523126258Smlaier case PF_BINAT: 2524126258Smlaier switch (direction) { 2525126258Smlaier case PF_OUT: 2526130613Smlaier if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){ 2527145836Smlaier switch (pd->af) { 2528145836Smlaier#ifdef INET 2529145836Smlaier case AF_INET: 2530130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2531130613Smlaier pfid_acnt4 < 1) 2532130613Smlaier return (NULL); 2533130613Smlaier PF_POOLMASK(naddr, 2534130613Smlaier &r->rpool.cur->addr.p.dyn-> 2535130613Smlaier pfid_addr4, 2536130613Smlaier &r->rpool.cur->addr.p.dyn-> 2537130613Smlaier pfid_mask4, 2538130613Smlaier saddr, AF_INET); 2539145836Smlaier break; 2540145836Smlaier#endif /* INET */ 2541145836Smlaier#ifdef INET6 2542145836Smlaier case AF_INET6: 2543130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2544130613Smlaier pfid_acnt6 < 1) 2545130613Smlaier return (NULL); 2546130613Smlaier PF_POOLMASK(naddr, 2547130613Smlaier &r->rpool.cur->addr.p.dyn-> 2548130613Smlaier pfid_addr6, 2549130613Smlaier &r->rpool.cur->addr.p.dyn-> 2550130613Smlaier pfid_mask6, 2551130613Smlaier saddr, AF_INET6); 2552145836Smlaier break; 2553145836Smlaier#endif /* INET6 */ 2554130613Smlaier } 2555130613Smlaier } else 2556126258Smlaier PF_POOLMASK(naddr, 2557126258Smlaier &r->rpool.cur->addr.v.a.addr, 2558126258Smlaier &r->rpool.cur->addr.v.a.mask, 2559126258Smlaier saddr, pd->af); 2560126258Smlaier break; 2561126258Smlaier case PF_IN: 2562138041Sdhartmei if (r->src.addr.type == PF_ADDR_DYNIFTL) { 2563145836Smlaier switch (pd->af) { 2564145836Smlaier#ifdef INET 2565145836Smlaier case AF_INET: 2566130613Smlaier if (r->src.addr.p.dyn-> 2567130613Smlaier pfid_acnt4 < 1) 2568130613Smlaier return (NULL); 2569130613Smlaier PF_POOLMASK(naddr, 2570130613Smlaier &r->src.addr.p.dyn-> 2571130613Smlaier pfid_addr4, 2572130613Smlaier &r->src.addr.p.dyn-> 2573130613Smlaier pfid_mask4, 2574130613Smlaier daddr, AF_INET); 2575145836Smlaier break; 2576145836Smlaier#endif /* INET */ 2577145836Smlaier#ifdef INET6 2578145836Smlaier case AF_INET6: 2579130613Smlaier if (r->src.addr.p.dyn-> 2580130613Smlaier pfid_acnt6 < 1) 2581130613Smlaier return (NULL); 2582130613Smlaier PF_POOLMASK(naddr, 2583130613Smlaier &r->src.addr.p.dyn-> 2584130613Smlaier pfid_addr6, 2585130613Smlaier &r->src.addr.p.dyn-> 2586130613Smlaier pfid_mask6, 2587130613Smlaier daddr, AF_INET6); 2588145836Smlaier break; 2589145836Smlaier#endif /* INET6 */ 2590130613Smlaier } 2591130613Smlaier } else 2592126258Smlaier PF_POOLMASK(naddr, 2593126258Smlaier &r->src.addr.v.a.addr, 2594126261Smlaier &r->src.addr.v.a.mask, daddr, 2595126258Smlaier pd->af); 2596126258Smlaier break; 2597126258Smlaier } 2598126258Smlaier break; 2599126258Smlaier case PF_RDR: { 2600140518Sdhartmei if (pf_map_addr(pd->af, r, saddr, naddr, NULL, sn)) 2601126258Smlaier return (NULL); 2602126258Smlaier 2603126258Smlaier if (r->rpool.proxy_port[1]) { 2604126258Smlaier u_int32_t tmp_nport; 2605126258Smlaier 2606126258Smlaier tmp_nport = ((ntohs(dport) - 2607126258Smlaier ntohs(r->dst.port[0])) % 2608126258Smlaier (r->rpool.proxy_port[1] - 2609126258Smlaier r->rpool.proxy_port[0] + 1)) + 2610126258Smlaier r->rpool.proxy_port[0]; 2611126258Smlaier 2612126258Smlaier /* wrap around if necessary */ 2613126258Smlaier if (tmp_nport > 65535) 2614126258Smlaier tmp_nport -= 65535; 2615126258Smlaier *nport = htons((u_int16_t)tmp_nport); 2616126258Smlaier } else if (r->rpool.proxy_port[0]) 2617126258Smlaier *nport = htons(r->rpool.proxy_port[0]); 2618126258Smlaier break; 2619126258Smlaier } 2620126258Smlaier default: 2621126258Smlaier return (NULL); 2622126258Smlaier } 2623126258Smlaier } 2624126258Smlaier 2625126258Smlaier return (r); 2626126258Smlaier} 2627126258Smlaier 2628126258Smlaierint 2629135920Smlaier#ifdef __FreeBSD__ 2630135920Smlaierpf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd, 2631135920Smlaier struct inpcb *inp_arg) 2632135920Smlaier#else 2633130613Smlaierpf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd) 2634135920Smlaier#endif 2635126258Smlaier{ 2636126258Smlaier struct pf_addr *saddr, *daddr; 2637126258Smlaier u_int16_t sport, dport; 2638127145Smlaier#ifdef __FreeBSD__ 2639126261Smlaier struct inpcbinfo *pi; 2640126261Smlaier#else 2641126258Smlaier struct inpcbtable *tb; 2642126261Smlaier#endif 2643126258Smlaier struct inpcb *inp; 2644126258Smlaier 2645126258Smlaier *uid = UID_MAX; 2646126258Smlaier *gid = GID_MAX; 2647135920Smlaier#ifdef __FreeBSD__ 2648135920Smlaier if (inp_arg != NULL) { 2649135920Smlaier INP_LOCK_ASSERT(inp_arg); 2650135920Smlaier if (inp_arg->inp_socket) { 2651135920Smlaier *uid = inp_arg->inp_socket->so_cred->cr_uid; 2652135920Smlaier *gid = inp_arg->inp_socket->so_cred->cr_groups[0]; 2653135920Smlaier return (1); 2654135920Smlaier } else 2655135920Smlaier return (0); 2656135920Smlaier } 2657135920Smlaier#endif 2658130613Smlaier switch (pd->proto) { 2659126258Smlaier case IPPROTO_TCP: 2660126258Smlaier sport = pd->hdr.tcp->th_sport; 2661126258Smlaier dport = pd->hdr.tcp->th_dport; 2662127145Smlaier#ifdef __FreeBSD__ 2663126261Smlaier pi = &tcbinfo; 2664126261Smlaier#else 2665126258Smlaier tb = &tcbtable; 2666126261Smlaier#endif 2667126258Smlaier break; 2668126258Smlaier case IPPROTO_UDP: 2669126258Smlaier sport = pd->hdr.udp->uh_sport; 2670126258Smlaier dport = pd->hdr.udp->uh_dport; 2671127145Smlaier#ifdef __FreeBSD__ 2672126261Smlaier pi = &udbinfo; 2673126261Smlaier#else 2674126258Smlaier tb = &udbtable; 2675126261Smlaier#endif 2676126258Smlaier break; 2677126258Smlaier default: 2678126258Smlaier return (0); 2679126258Smlaier } 2680126258Smlaier if (direction == PF_IN) { 2681126258Smlaier saddr = pd->src; 2682126258Smlaier daddr = pd->dst; 2683126258Smlaier } else { 2684126258Smlaier u_int16_t p; 2685126258Smlaier 2686126258Smlaier p = sport; 2687126258Smlaier sport = dport; 2688126258Smlaier dport = p; 2689126258Smlaier saddr = pd->dst; 2690126258Smlaier daddr = pd->src; 2691126258Smlaier } 2692130613Smlaier switch (pd->af) { 2693145836Smlaier#ifdef INET 2694126258Smlaier case AF_INET: 2695127145Smlaier#ifdef __FreeBSD__ 2696126261Smlaier INP_INFO_RLOCK(pi); /* XXX LOR */ 2697126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, daddr->v4, 2698126261Smlaier dport, 0, NULL); 2699126261Smlaier if (inp == NULL) { 2700126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, 2701126261Smlaier daddr->v4, dport, INPLOOKUP_WILDCARD, NULL); 2702126261Smlaier if(inp == NULL) { 2703126261Smlaier INP_INFO_RUNLOCK(pi); 2704126261Smlaier return (0); 2705126261Smlaier } 2706126261Smlaier } 2707126261Smlaier#else 2708126258Smlaier inp = in_pcbhashlookup(tb, saddr->v4, sport, daddr->v4, dport); 2709126258Smlaier if (inp == NULL) { 2710130613Smlaier inp = in_pcblookup_listen(tb, daddr->v4, dport, 0); 2711126258Smlaier if (inp == NULL) 2712126258Smlaier return (0); 2713126258Smlaier } 2714126261Smlaier#endif 2715126258Smlaier break; 2716145836Smlaier#endif /* INET */ 2717126258Smlaier#ifdef INET6 2718126258Smlaier case AF_INET6: 2719127145Smlaier#ifdef __FreeBSD__ 2720126261Smlaier INP_INFO_RLOCK(pi); 2721126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2722126261Smlaier &daddr->v6, dport, 0, NULL); 2723126261Smlaier if (inp == NULL) { 2724126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2725126261Smlaier &daddr->v6, dport, INPLOOKUP_WILDCARD, NULL); 2726126261Smlaier if (inp == NULL) { 2727126261Smlaier INP_INFO_RUNLOCK(pi); 2728126261Smlaier return (0); 2729126261Smlaier } 2730126261Smlaier } 2731126261Smlaier#else 2732126258Smlaier inp = in6_pcbhashlookup(tb, &saddr->v6, sport, &daddr->v6, 2733126258Smlaier dport); 2734126258Smlaier if (inp == NULL) { 2735130613Smlaier inp = in6_pcblookup_listen(tb, &daddr->v6, dport, 0); 2736126258Smlaier if (inp == NULL) 2737126258Smlaier return (0); 2738126258Smlaier } 2739126261Smlaier#endif 2740126258Smlaier break; 2741126258Smlaier#endif /* INET6 */ 2742126258Smlaier 2743126258Smlaier default: 2744126258Smlaier return (0); 2745126258Smlaier } 2746127145Smlaier#ifdef __FreeBSD__ 2747126261Smlaier INP_LOCK(inp); 2748136925Smlaier if ((inp->inp_socket == NULL) || (inp->inp_socket->so_cred == NULL)) { 2749136925Smlaier INP_UNLOCK(inp); 2750136925Smlaier INP_INFO_RUNLOCK(pi); 2751136925Smlaier return (0); 2752136925Smlaier } 2753126261Smlaier *uid = inp->inp_socket->so_cred->cr_uid; 2754126261Smlaier *gid = inp->inp_socket->so_cred->cr_groups[0]; 2755126261Smlaier INP_UNLOCK(inp); 2756126261Smlaier INP_INFO_RUNLOCK(pi); 2757126261Smlaier#else 2758126258Smlaier *uid = inp->inp_socket->so_euid; 2759126258Smlaier *gid = inp->inp_socket->so_egid; 2760126261Smlaier#endif 2761126258Smlaier return (1); 2762126258Smlaier} 2763126258Smlaier 2764126258Smlaieru_int8_t 2765126258Smlaierpf_get_wscale(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2766126258Smlaier{ 2767126258Smlaier int hlen; 2768126258Smlaier u_int8_t hdr[60]; 2769126258Smlaier u_int8_t *opt, optlen; 2770126258Smlaier u_int8_t wscale = 0; 2771126258Smlaier 2772126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2773126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2774126258Smlaier return (0); 2775126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2776126258Smlaier return (0); 2777126258Smlaier opt = hdr + sizeof(struct tcphdr); 2778126258Smlaier hlen -= sizeof(struct tcphdr); 2779126258Smlaier while (hlen >= 3) { 2780126258Smlaier switch (*opt) { 2781126258Smlaier case TCPOPT_EOL: 2782126258Smlaier case TCPOPT_NOP: 2783126258Smlaier ++opt; 2784126258Smlaier --hlen; 2785126258Smlaier break; 2786126258Smlaier case TCPOPT_WINDOW: 2787126258Smlaier wscale = opt[2]; 2788126258Smlaier if (wscale > TCP_MAX_WINSHIFT) 2789126258Smlaier wscale = TCP_MAX_WINSHIFT; 2790126258Smlaier wscale |= PF_WSCALE_FLAG; 2791130613Smlaier /* FALLTHROUGH */ 2792126258Smlaier default: 2793126258Smlaier optlen = opt[1]; 2794126258Smlaier if (optlen < 2) 2795126258Smlaier optlen = 2; 2796126258Smlaier hlen -= optlen; 2797126258Smlaier opt += optlen; 2798130613Smlaier break; 2799126258Smlaier } 2800126258Smlaier } 2801126258Smlaier return (wscale); 2802126258Smlaier} 2803126258Smlaier 2804126258Smlaieru_int16_t 2805126258Smlaierpf_get_mss(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2806126258Smlaier{ 2807126258Smlaier int hlen; 2808126258Smlaier u_int8_t hdr[60]; 2809126258Smlaier u_int8_t *opt, optlen; 2810126258Smlaier u_int16_t mss = tcp_mssdflt; 2811126258Smlaier 2812126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2813126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2814126258Smlaier return (0); 2815126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2816126258Smlaier return (0); 2817126258Smlaier opt = hdr + sizeof(struct tcphdr); 2818126258Smlaier hlen -= sizeof(struct tcphdr); 2819126258Smlaier while (hlen >= TCPOLEN_MAXSEG) { 2820126258Smlaier switch (*opt) { 2821126258Smlaier case TCPOPT_EOL: 2822126258Smlaier case TCPOPT_NOP: 2823126258Smlaier ++opt; 2824126258Smlaier --hlen; 2825126258Smlaier break; 2826126258Smlaier case TCPOPT_MAXSEG: 2827126258Smlaier bcopy((caddr_t)(opt + 2), (caddr_t)&mss, 2); 2828145030Sglebius NTOHS(mss); 2829130613Smlaier /* FALLTHROUGH */ 2830126258Smlaier default: 2831126258Smlaier optlen = opt[1]; 2832126258Smlaier if (optlen < 2) 2833126258Smlaier optlen = 2; 2834126258Smlaier hlen -= optlen; 2835126258Smlaier opt += optlen; 2836130613Smlaier break; 2837126258Smlaier } 2838126258Smlaier } 2839126258Smlaier return (mss); 2840126258Smlaier} 2841126258Smlaier 2842126258Smlaieru_int16_t 2843126258Smlaierpf_calc_mss(struct pf_addr *addr, sa_family_t af, u_int16_t offer) 2844126258Smlaier{ 2845126258Smlaier#ifdef INET 2846126258Smlaier struct sockaddr_in *dst; 2847126258Smlaier struct route ro; 2848126258Smlaier#endif /* INET */ 2849126258Smlaier#ifdef INET6 2850126258Smlaier struct sockaddr_in6 *dst6; 2851126258Smlaier struct route_in6 ro6; 2852126258Smlaier#endif /* INET6 */ 2853126258Smlaier struct rtentry *rt = NULL; 2854127629Smlaier int hlen = 0; /* make the compiler happy */ 2855126258Smlaier u_int16_t mss = tcp_mssdflt; 2856126258Smlaier 2857126258Smlaier switch (af) { 2858126258Smlaier#ifdef INET 2859126258Smlaier case AF_INET: 2860126258Smlaier hlen = sizeof(struct ip); 2861126258Smlaier bzero(&ro, sizeof(ro)); 2862126258Smlaier dst = (struct sockaddr_in *)&ro.ro_dst; 2863126258Smlaier dst->sin_family = AF_INET; 2864126258Smlaier dst->sin_len = sizeof(*dst); 2865126258Smlaier dst->sin_addr = addr->v4; 2866127145Smlaier#ifdef __FreeBSD__ 2867126261Smlaier#ifdef RTF_PRCLONING 2868126261Smlaier rtalloc_ign(&ro, (RTF_CLONING | RTF_PRCLONING)); 2869126261Smlaier#else /* !RTF_PRCLONING */ 2870126261Smlaier rtalloc_ign(&ro, RTF_CLONING); 2871126261Smlaier#endif 2872126261Smlaier#else /* ! __FreeBSD__ */ 2873126258Smlaier rtalloc_noclone(&ro, NO_CLONING); 2874126261Smlaier#endif 2875126258Smlaier rt = ro.ro_rt; 2876126258Smlaier break; 2877126258Smlaier#endif /* INET */ 2878126258Smlaier#ifdef INET6 2879126258Smlaier case AF_INET6: 2880126258Smlaier hlen = sizeof(struct ip6_hdr); 2881126258Smlaier bzero(&ro6, sizeof(ro6)); 2882126258Smlaier dst6 = (struct sockaddr_in6 *)&ro6.ro_dst; 2883126258Smlaier dst6->sin6_family = AF_INET6; 2884126258Smlaier dst6->sin6_len = sizeof(*dst6); 2885126258Smlaier dst6->sin6_addr = addr->v6; 2886127145Smlaier#ifdef __FreeBSD__ 2887126261Smlaier#ifdef RTF_PRCLONING 2888126261Smlaier rtalloc_ign((struct route *)&ro6, 2889126261Smlaier (RTF_CLONING | RTF_PRCLONING)); 2890126261Smlaier#else /* !RTF_PRCLONING */ 2891126261Smlaier rtalloc_ign((struct route *)&ro6, RTF_CLONING); 2892126261Smlaier#endif 2893126261Smlaier#else /* ! __FreeBSD__ */ 2894126258Smlaier rtalloc_noclone((struct route *)&ro6, NO_CLONING); 2895126261Smlaier#endif 2896126258Smlaier rt = ro6.ro_rt; 2897126258Smlaier break; 2898126258Smlaier#endif /* INET6 */ 2899126258Smlaier } 2900126258Smlaier 2901126258Smlaier if (rt && rt->rt_ifp) { 2902126258Smlaier mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr); 2903126258Smlaier mss = max(tcp_mssdflt, mss); 2904126258Smlaier RTFREE(rt); 2905126258Smlaier } 2906126258Smlaier mss = min(mss, offer); 2907126258Smlaier mss = max(mss, 64); /* sanity - at least max opt space */ 2908126258Smlaier return (mss); 2909126258Smlaier} 2910126258Smlaier 2911126258Smlaiervoid 2912126258Smlaierpf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr) 2913126258Smlaier{ 2914126258Smlaier struct pf_rule *r = s->rule.ptr; 2915126258Smlaier 2916130613Smlaier s->rt_kif = NULL; 2917126258Smlaier if (!r->rt || r->rt == PF_FASTROUTE) 2918126258Smlaier return; 2919126258Smlaier switch (s->af) { 2920126258Smlaier#ifdef INET 2921126258Smlaier case AF_INET: 2922130613Smlaier pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL, 2923130613Smlaier &s->nat_src_node); 2924130613Smlaier s->rt_kif = r->rpool.cur->kif; 2925126258Smlaier break; 2926126258Smlaier#endif /* INET */ 2927126258Smlaier#ifdef INET6 2928126258Smlaier case AF_INET6: 2929130613Smlaier pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL, 2930130613Smlaier &s->nat_src_node); 2931130613Smlaier s->rt_kif = r->rpool.cur->kif; 2932126258Smlaier break; 2933126258Smlaier#endif /* INET6 */ 2934126258Smlaier } 2935126258Smlaier} 2936126258Smlaier 2937126258Smlaierint 2938126258Smlaierpf_test_tcp(struct pf_rule **rm, struct pf_state **sm, int direction, 2939130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 2940135920Smlaier#ifdef __FreeBSD__ 2941135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 2942145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 2943135920Smlaier#else 2944145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 2945145836Smlaier struct ifqueue *ifq) 2946135920Smlaier#endif 2947126258Smlaier{ 2948130613Smlaier struct pf_rule *nr = NULL; 2949126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 2950126258Smlaier struct tcphdr *th = pd->hdr.tcp; 2951126258Smlaier u_int16_t bport, nport = 0; 2952126258Smlaier sa_family_t af = pd->af; 2953126258Smlaier int lookup = -1; 2954126258Smlaier uid_t uid; 2955126258Smlaier gid_t gid; 2956126258Smlaier struct pf_rule *r, *a = NULL; 2957126258Smlaier struct pf_ruleset *ruleset = NULL; 2958130613Smlaier struct pf_src_node *nsn = NULL; 2959126258Smlaier u_short reason; 2960126258Smlaier int rewrite = 0; 2961126258Smlaier struct pf_tag *pftag = NULL; 2962126258Smlaier int tag = -1; 2963126258Smlaier u_int16_t mss = tcp_mssdflt; 2964145836Smlaier int asd = 0; 2965126258Smlaier 2966145836Smlaier if (pf_check_congestion(ifq)) { 2967145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 2968145836Smlaier return (PF_DROP); 2969145836Smlaier } 2970145836Smlaier 2971126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 2972126258Smlaier 2973126258Smlaier if (direction == PF_OUT) { 2974126258Smlaier bport = nport = th->th_sport; 2975126258Smlaier /* check outgoing packet for BINAT/NAT */ 2976130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 2977126258Smlaier saddr, th->th_sport, daddr, th->th_dport, 2978130613Smlaier &pd->naddr, &nport)) != NULL) { 2979130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 2980126258Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 2981130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 2982126258Smlaier rewrite++; 2983130613Smlaier if (nr->natpass) 2984126258Smlaier r = NULL; 2985130613Smlaier pd->nat_rule = nr; 2986126258Smlaier } 2987126258Smlaier } else { 2988126258Smlaier bport = nport = th->th_dport; 2989126258Smlaier /* check incoming packet for BINAT/RDR */ 2990130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 2991130613Smlaier saddr, th->th_sport, daddr, th->th_dport, 2992130613Smlaier &pd->naddr, &nport)) != NULL) { 2993130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 2994126258Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 2995130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 2996126258Smlaier rewrite++; 2997130613Smlaier if (nr->natpass) 2998126258Smlaier r = NULL; 2999130613Smlaier pd->nat_rule = nr; 3000126258Smlaier } 3001126258Smlaier } 3002126258Smlaier 3003126258Smlaier while (r != NULL) { 3004126258Smlaier r->evaluations++; 3005130613Smlaier if (r->kif != NULL && 3006130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3007126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3008126258Smlaier else if (r->direction && r->direction != direction) 3009126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3010126258Smlaier else if (r->af && r->af != af) 3011126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3012126258Smlaier else if (r->proto && r->proto != IPPROTO_TCP) 3013126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3014145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3015126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3016126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3017126258Smlaier r->src.port[0], r->src.port[1], th->th_sport)) 3018126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3019145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3020126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3021126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3022126258Smlaier r->dst.port[0], r->dst.port[1], th->th_dport)) 3023126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3024126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3025126258Smlaier r = TAILQ_NEXT(r, entries); 3026126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3027126258Smlaier r = TAILQ_NEXT(r, entries); 3028126258Smlaier else if ((r->flagset & th->th_flags) != r->flags) 3029126258Smlaier r = TAILQ_NEXT(r, entries); 3030126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 3031135920Smlaier#ifdef __FreeBSD__ 3032135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3033135920Smlaier#else 3034130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3035135920Smlaier#endif 3036126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3037126258Smlaier uid)) 3038126258Smlaier r = TAILQ_NEXT(r, entries); 3039126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 3040135920Smlaier#ifdef __FreeBSD__ 3041135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3042135920Smlaier#else 3043130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3044135920Smlaier#endif 3045126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3046126258Smlaier gid)) 3047126258Smlaier r = TAILQ_NEXT(r, entries); 3048145836Smlaier else if (r->prob && r->prob <= arc4random()) 3049126258Smlaier r = TAILQ_NEXT(r, entries); 3050145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3051126258Smlaier r = TAILQ_NEXT(r, entries); 3052126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && !pf_osfp_match( 3053126258Smlaier pf_osfp_fingerprint(pd, m, off, th), r->os_fingerprint)) 3054126258Smlaier r = TAILQ_NEXT(r, entries); 3055126258Smlaier else { 3056126258Smlaier if (r->tag) 3057126258Smlaier tag = r->tag; 3058126258Smlaier if (r->anchor == NULL) { 3059126258Smlaier *rm = r; 3060126258Smlaier *am = a; 3061126258Smlaier *rsm = ruleset; 3062126258Smlaier if ((*rm)->quick) 3063126258Smlaier break; 3064126258Smlaier r = TAILQ_NEXT(r, entries); 3065126258Smlaier } else 3066145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3067145836Smlaier PF_RULESET_FILTER, &r, &a); 3068126258Smlaier } 3069145836Smlaier if (r == NULL) 3070145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3071145836Smlaier PF_RULESET_FILTER, &r, &a); 3072126258Smlaier } 3073126258Smlaier r = *rm; 3074126258Smlaier a = *am; 3075126258Smlaier ruleset = *rsm; 3076126258Smlaier 3077126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3078126258Smlaier 3079126258Smlaier if (r->log) { 3080126258Smlaier if (rewrite) 3081126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3082130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3083126258Smlaier } 3084126258Smlaier 3085126258Smlaier if ((r->action == PF_DROP) && 3086126258Smlaier ((r->rule_flag & PFRULE_RETURNRST) || 3087126258Smlaier (r->rule_flag & PFRULE_RETURNICMP) || 3088126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3089126258Smlaier /* undo NAT changes, if they have taken place */ 3090130613Smlaier if (nr != NULL) { 3091130613Smlaier if (direction == PF_OUT) { 3092130613Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 3093130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3094130613Smlaier rewrite++; 3095130613Smlaier } else { 3096130613Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 3097130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 3098130613Smlaier rewrite++; 3099130613Smlaier } 3100126258Smlaier } 3101126258Smlaier if (((r->rule_flag & PFRULE_RETURNRST) || 3102126258Smlaier (r->rule_flag & PFRULE_RETURN)) && 3103126258Smlaier !(th->th_flags & TH_RST)) { 3104126258Smlaier u_int32_t ack = ntohl(th->th_seq) + pd->p_len; 3105126258Smlaier 3106126258Smlaier if (th->th_flags & TH_SYN) 3107126258Smlaier ack++; 3108126258Smlaier if (th->th_flags & TH_FIN) 3109126258Smlaier ack++; 3110126258Smlaier pf_send_tcp(r, af, pd->dst, 3111126258Smlaier pd->src, th->th_dport, th->th_sport, 3112126258Smlaier ntohl(th->th_ack), ack, TH_RST|TH_ACK, 0, 0, 3113145836Smlaier r->return_ttl, 1, pd->eh, kif->pfik_ifp); 3114126258Smlaier } else if ((af == AF_INET) && r->return_icmp) 3115126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3116126258Smlaier r->return_icmp & 255, af, r); 3117126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3118126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3119126258Smlaier r->return_icmp6 & 255, af, r); 3120126258Smlaier } 3121126258Smlaier 3122126258Smlaier if (r->action == PF_DROP) 3123126258Smlaier return (PF_DROP); 3124126258Smlaier 3125126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3126126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3127126258Smlaier return (PF_DROP); 3128126258Smlaier } 3129126258Smlaier 3130130613Smlaier if (r->keep_state || nr != NULL || 3131126258Smlaier (pd->flags & PFDESC_TCP_NORM)) { 3132126258Smlaier /* create new state */ 3133126258Smlaier u_int16_t len; 3134126258Smlaier struct pf_state *s = NULL; 3135130613Smlaier struct pf_src_node *sn = NULL; 3136126258Smlaier 3137126258Smlaier len = pd->tot_len - off - (th->th_off << 2); 3138130613Smlaier 3139130613Smlaier /* check maximums */ 3140145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3141145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3142145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3143130613Smlaier goto cleanup; 3144145836Smlaier } 3145130613Smlaier /* src node for flter rule */ 3146130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3147130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3148145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3149145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3150130613Smlaier goto cleanup; 3151145836Smlaier } 3152130613Smlaier /* src node for translation rule */ 3153130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3154130613Smlaier ((direction == PF_OUT && 3155130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3156145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3157145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3158130613Smlaier goto cleanup; 3159145836Smlaier } 3160130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3161126258Smlaier if (s == NULL) { 3162145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3163130613Smlaiercleanup: 3164130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3165130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3166130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3167130613Smlaier pf_status.src_nodes--; 3168130613Smlaier pool_put(&pf_src_tree_pl, sn); 3169130613Smlaier } 3170130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3171130613Smlaier nsn->expire == 0) { 3172130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3173130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3174130613Smlaier pf_status.src_nodes--; 3175130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3176130613Smlaier } 3177126258Smlaier return (PF_DROP); 3178126258Smlaier } 3179126258Smlaier bzero(s, sizeof(*s)); 3180126258Smlaier s->rule.ptr = r; 3181130613Smlaier s->nat_rule.ptr = nr; 3182126258Smlaier s->anchor.ptr = a; 3183145836Smlaier STATE_INC_COUNTERS(s); 3184126258Smlaier s->allow_opts = r->allow_opts; 3185126258Smlaier s->log = r->log & 2; 3186126258Smlaier s->proto = IPPROTO_TCP; 3187126258Smlaier s->direction = direction; 3188126258Smlaier s->af = af; 3189126258Smlaier if (direction == PF_OUT) { 3190126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3191126258Smlaier s->gwy.port = th->th_sport; /* sport */ 3192126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3193126258Smlaier s->ext.port = th->th_dport; 3194130613Smlaier if (nr != NULL) { 3195130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3196126258Smlaier s->lan.port = bport; 3197126258Smlaier } else { 3198126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3199126258Smlaier s->lan.port = s->gwy.port; 3200126258Smlaier } 3201126258Smlaier } else { 3202126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3203126258Smlaier s->lan.port = th->th_dport; 3204126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3205126258Smlaier s->ext.port = th->th_sport; 3206130613Smlaier if (nr != NULL) { 3207130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3208126258Smlaier s->gwy.port = bport; 3209126258Smlaier } else { 3210126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3211126258Smlaier s->gwy.port = s->lan.port; 3212126258Smlaier } 3213126258Smlaier } 3214126258Smlaier 3215126258Smlaier s->src.seqlo = ntohl(th->th_seq); 3216126258Smlaier s->src.seqhi = s->src.seqlo + len + 1; 3217126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3218126258Smlaier r->keep_state == PF_STATE_MODULATE) { 3219126258Smlaier /* Generate sequence number modulator */ 3220145836Smlaier while ((s->src.seqdiff = htonl(arc4random())) == 0) 3221126258Smlaier ; 3222126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, 3223126258Smlaier htonl(s->src.seqlo + s->src.seqdiff), 0); 3224126258Smlaier rewrite = 1; 3225126258Smlaier } else 3226126258Smlaier s->src.seqdiff = 0; 3227126258Smlaier if (th->th_flags & TH_SYN) { 3228126258Smlaier s->src.seqhi++; 3229126258Smlaier s->src.wscale = pf_get_wscale(m, off, th->th_off, af); 3230126258Smlaier } 3231126258Smlaier s->src.max_win = MAX(ntohs(th->th_win), 1); 3232126258Smlaier if (s->src.wscale & PF_WSCALE_MASK) { 3233126258Smlaier /* Remove scale factor from initial window */ 3234126258Smlaier int win = s->src.max_win; 3235126258Smlaier win += 1 << (s->src.wscale & PF_WSCALE_MASK); 3236126258Smlaier s->src.max_win = (win - 1) >> 3237126258Smlaier (s->src.wscale & PF_WSCALE_MASK); 3238126258Smlaier } 3239126258Smlaier if (th->th_flags & TH_FIN) 3240126258Smlaier s->src.seqhi++; 3241126258Smlaier s->dst.seqhi = 1; 3242126258Smlaier s->dst.max_win = 1; 3243126258Smlaier s->src.state = TCPS_SYN_SENT; 3244126258Smlaier s->dst.state = TCPS_CLOSED; 3245126261Smlaier s->creation = time_second; 3246126261Smlaier s->expire = time_second; 3247126258Smlaier s->timeout = PFTM_TCP_FIRST_PACKET; 3248126258Smlaier pf_set_rt_ifp(s, saddr); 3249130613Smlaier if (sn != NULL) { 3250130613Smlaier s->src_node = sn; 3251130613Smlaier s->src_node->states++; 3252130613Smlaier } 3253130613Smlaier if (nsn != NULL) { 3254130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3255130613Smlaier s->nat_src_node = nsn; 3256130613Smlaier s->nat_src_node->states++; 3257130613Smlaier } 3258126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && pf_normalize_tcp_init(m, 3259126258Smlaier off, pd, th, &s->src, &s->dst)) { 3260126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3261130613Smlaier pf_src_tree_remove_state(s); 3262145836Smlaier STATE_DEC_COUNTERS(s); 3263126258Smlaier pool_put(&pf_state_pl, s); 3264126258Smlaier return (PF_DROP); 3265126258Smlaier } 3266126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && s->src.scrub && 3267145836Smlaier pf_normalize_tcp_stateful(m, off, pd, &reason, th, s, 3268145836Smlaier &s->src, &s->dst, &rewrite)) { 3269145836Smlaier /* This really shouldn't happen!!! */ 3270145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 3271145836Smlaier ("pf_normalize_tcp_stateful failed on first pkt")); 3272126258Smlaier pf_normalize_tcp_cleanup(s); 3273130613Smlaier pf_src_tree_remove_state(s); 3274145836Smlaier STATE_DEC_COUNTERS(s); 3275126258Smlaier pool_put(&pf_state_pl, s); 3276126258Smlaier return (PF_DROP); 3277126258Smlaier } 3278130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3279126258Smlaier pf_normalize_tcp_cleanup(s); 3280145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3281130613Smlaier pf_src_tree_remove_state(s); 3282145836Smlaier STATE_DEC_COUNTERS(s); 3283126258Smlaier pool_put(&pf_state_pl, s); 3284126258Smlaier return (PF_DROP); 3285126258Smlaier } else 3286126258Smlaier *sm = s; 3287145836Smlaier if (tag > 0) { 3288145836Smlaier pf_tag_ref(tag); 3289145836Smlaier s->tag = tag; 3290145836Smlaier } 3291126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 3292126258Smlaier r->keep_state == PF_STATE_SYNPROXY) { 3293126258Smlaier s->src.state = PF_TCPS_PROXY_SRC; 3294130613Smlaier if (nr != NULL) { 3295130613Smlaier if (direction == PF_OUT) { 3296130613Smlaier pf_change_ap(saddr, &th->th_sport, 3297130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3298130613Smlaier bport, 0, af); 3299130613Smlaier } else { 3300130613Smlaier pf_change_ap(daddr, &th->th_dport, 3301130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 3302130613Smlaier bport, 0, af); 3303130613Smlaier } 3304130613Smlaier } 3305145836Smlaier s->src.seqhi = htonl(arc4random()); 3306126258Smlaier /* Find mss option */ 3307126258Smlaier mss = pf_get_mss(m, off, th->th_off, af); 3308126258Smlaier mss = pf_calc_mss(saddr, af, mss); 3309126258Smlaier mss = pf_calc_mss(daddr, af, mss); 3310126258Smlaier s->src.mss = mss; 3311126258Smlaier pf_send_tcp(r, af, daddr, saddr, th->th_dport, 3312130613Smlaier th->th_sport, s->src.seqhi, ntohl(th->th_seq) + 1, 3313145836Smlaier TH_SYN|TH_ACK, 0, s->src.mss, 0, 1, NULL, NULL); 3314145836Smlaier REASON_SET(&reason, PFRES_SYNPROXY); 3315126258Smlaier return (PF_SYNPROXY_DROP); 3316126258Smlaier } 3317126258Smlaier } 3318126258Smlaier 3319126258Smlaier /* copy back packet headers if we performed NAT operations */ 3320126258Smlaier if (rewrite) 3321126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3322126258Smlaier 3323126258Smlaier return (PF_PASS); 3324126258Smlaier} 3325126258Smlaier 3326126258Smlaierint 3327126258Smlaierpf_test_udp(struct pf_rule **rm, struct pf_state **sm, int direction, 3328130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3329135920Smlaier#ifdef __FreeBSD__ 3330135920Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3331145836Smlaier struct ifqueue *ifq, struct inpcb *inp) 3332135920Smlaier#else 3333145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3334145836Smlaier struct ifqueue *ifq) 3335135920Smlaier#endif 3336126258Smlaier{ 3337130613Smlaier struct pf_rule *nr = NULL; 3338126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3339126258Smlaier struct udphdr *uh = pd->hdr.udp; 3340126258Smlaier u_int16_t bport, nport = 0; 3341126258Smlaier sa_family_t af = pd->af; 3342126258Smlaier int lookup = -1; 3343126258Smlaier uid_t uid; 3344126258Smlaier gid_t gid; 3345126258Smlaier struct pf_rule *r, *a = NULL; 3346126258Smlaier struct pf_ruleset *ruleset = NULL; 3347130613Smlaier struct pf_src_node *nsn = NULL; 3348126258Smlaier u_short reason; 3349126258Smlaier int rewrite = 0; 3350126258Smlaier struct pf_tag *pftag = NULL; 3351126258Smlaier int tag = -1; 3352145836Smlaier int asd = 0; 3353126258Smlaier 3354145836Smlaier if (pf_check_congestion(ifq)) { 3355145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3356145836Smlaier return (PF_DROP); 3357145836Smlaier } 3358145836Smlaier 3359126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3360126258Smlaier 3361126258Smlaier if (direction == PF_OUT) { 3362126258Smlaier bport = nport = uh->uh_sport; 3363126258Smlaier /* check outgoing packet for BINAT/NAT */ 3364130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3365126258Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, 3366130613Smlaier &pd->naddr, &nport)) != NULL) { 3367130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3368126258Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3369130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3370126258Smlaier rewrite++; 3371130613Smlaier if (nr->natpass) 3372126258Smlaier r = NULL; 3373130613Smlaier pd->nat_rule = nr; 3374126258Smlaier } 3375126258Smlaier } else { 3376126258Smlaier bport = nport = uh->uh_dport; 3377126258Smlaier /* check incoming packet for BINAT/RDR */ 3378130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3379130613Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, &pd->naddr, 3380130613Smlaier &nport)) != NULL) { 3381130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3382126258Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3383130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3384126258Smlaier rewrite++; 3385130613Smlaier if (nr->natpass) 3386126258Smlaier r = NULL; 3387130613Smlaier pd->nat_rule = nr; 3388126258Smlaier } 3389126258Smlaier } 3390126258Smlaier 3391126258Smlaier while (r != NULL) { 3392126258Smlaier r->evaluations++; 3393130613Smlaier if (r->kif != NULL && 3394130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3395126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3396126258Smlaier else if (r->direction && r->direction != direction) 3397126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3398126258Smlaier else if (r->af && r->af != af) 3399126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3400126258Smlaier else if (r->proto && r->proto != IPPROTO_UDP) 3401126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3402145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3403126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3404126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3405126258Smlaier r->src.port[0], r->src.port[1], uh->uh_sport)) 3406126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3407145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3408126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3409126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3410126258Smlaier r->dst.port[0], r->dst.port[1], uh->uh_dport)) 3411126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3412126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3413126258Smlaier r = TAILQ_NEXT(r, entries); 3414126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3415126258Smlaier r = TAILQ_NEXT(r, entries); 3416126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 3417135920Smlaier#ifdef __FreeBSD__ 3418135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3419135920Smlaier#else 3420130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3421135920Smlaier#endif 3422126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3423126258Smlaier uid)) 3424126258Smlaier r = TAILQ_NEXT(r, entries); 3425126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 3426135920Smlaier#ifdef __FreeBSD__ 3427135920Smlaier pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) && 3428135920Smlaier#else 3429130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3430135920Smlaier#endif 3431126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3432126258Smlaier gid)) 3433126258Smlaier r = TAILQ_NEXT(r, entries); 3434145836Smlaier else if (r->prob && r->prob <= arc4random()) 3435126258Smlaier r = TAILQ_NEXT(r, entries); 3436145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3437126258Smlaier r = TAILQ_NEXT(r, entries); 3438126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3439126258Smlaier r = TAILQ_NEXT(r, entries); 3440126258Smlaier else { 3441126258Smlaier if (r->tag) 3442126258Smlaier tag = r->tag; 3443126258Smlaier if (r->anchor == NULL) { 3444126258Smlaier *rm = r; 3445126258Smlaier *am = a; 3446126258Smlaier *rsm = ruleset; 3447126258Smlaier if ((*rm)->quick) 3448126258Smlaier break; 3449126258Smlaier r = TAILQ_NEXT(r, entries); 3450126258Smlaier } else 3451145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3452145836Smlaier PF_RULESET_FILTER, &r, &a); 3453126258Smlaier } 3454145836Smlaier if (r == NULL) 3455145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3456145836Smlaier PF_RULESET_FILTER, &r, &a); 3457126258Smlaier } 3458126258Smlaier r = *rm; 3459126258Smlaier a = *am; 3460126258Smlaier ruleset = *rsm; 3461126258Smlaier 3462126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3463126258Smlaier 3464126258Smlaier if (r->log) { 3465126258Smlaier if (rewrite) 3466126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3467130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3468126258Smlaier } 3469126258Smlaier 3470126258Smlaier if ((r->action == PF_DROP) && 3471126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 3472126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3473126258Smlaier /* undo NAT changes, if they have taken place */ 3474130613Smlaier if (nr != NULL) { 3475130613Smlaier if (direction == PF_OUT) { 3476130613Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3477130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3478130613Smlaier rewrite++; 3479130613Smlaier } else { 3480130613Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3481130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3482130613Smlaier rewrite++; 3483130613Smlaier } 3484126258Smlaier } 3485126258Smlaier if ((af == AF_INET) && r->return_icmp) 3486126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3487126258Smlaier r->return_icmp & 255, af, r); 3488126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3489126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3490126258Smlaier r->return_icmp6 & 255, af, r); 3491126258Smlaier } 3492126258Smlaier 3493126258Smlaier if (r->action == PF_DROP) 3494126258Smlaier return (PF_DROP); 3495126258Smlaier 3496126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3497126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3498126258Smlaier return (PF_DROP); 3499126258Smlaier } 3500126258Smlaier 3501130613Smlaier if (r->keep_state || nr != NULL) { 3502126258Smlaier /* create new state */ 3503126258Smlaier struct pf_state *s = NULL; 3504130613Smlaier struct pf_src_node *sn = NULL; 3505126258Smlaier 3506130613Smlaier /* check maximums */ 3507145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3508145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3509145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3510130613Smlaier goto cleanup; 3511145836Smlaier } 3512130613Smlaier /* src node for flter rule */ 3513130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3514130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3515145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3516145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3517130613Smlaier goto cleanup; 3518145836Smlaier } 3519130613Smlaier /* src node for translation rule */ 3520130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3521130613Smlaier ((direction == PF_OUT && 3522130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3523145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3524145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3525130613Smlaier goto cleanup; 3526145836Smlaier } 3527130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3528126258Smlaier if (s == NULL) { 3529145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3530130613Smlaiercleanup: 3531130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3532130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3533130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3534130613Smlaier pf_status.src_nodes--; 3535130613Smlaier pool_put(&pf_src_tree_pl, sn); 3536130613Smlaier } 3537130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3538130613Smlaier nsn->expire == 0) { 3539130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3540130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3541130613Smlaier pf_status.src_nodes--; 3542130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3543130613Smlaier } 3544126258Smlaier return (PF_DROP); 3545126258Smlaier } 3546126258Smlaier bzero(s, sizeof(*s)); 3547126258Smlaier s->rule.ptr = r; 3548130613Smlaier s->nat_rule.ptr = nr; 3549126258Smlaier s->anchor.ptr = a; 3550145836Smlaier STATE_INC_COUNTERS(s); 3551126258Smlaier s->allow_opts = r->allow_opts; 3552126258Smlaier s->log = r->log & 2; 3553126258Smlaier s->proto = IPPROTO_UDP; 3554126258Smlaier s->direction = direction; 3555126258Smlaier s->af = af; 3556126258Smlaier if (direction == PF_OUT) { 3557126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3558126258Smlaier s->gwy.port = uh->uh_sport; 3559126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3560126258Smlaier s->ext.port = uh->uh_dport; 3561130613Smlaier if (nr != NULL) { 3562130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3563126258Smlaier s->lan.port = bport; 3564126258Smlaier } else { 3565126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3566126258Smlaier s->lan.port = s->gwy.port; 3567126258Smlaier } 3568126258Smlaier } else { 3569126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3570126258Smlaier s->lan.port = uh->uh_dport; 3571126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3572126258Smlaier s->ext.port = uh->uh_sport; 3573130613Smlaier if (nr != NULL) { 3574130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3575126258Smlaier s->gwy.port = bport; 3576126258Smlaier } else { 3577126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3578126258Smlaier s->gwy.port = s->lan.port; 3579126258Smlaier } 3580126258Smlaier } 3581126258Smlaier s->src.state = PFUDPS_SINGLE; 3582126258Smlaier s->dst.state = PFUDPS_NO_TRAFFIC; 3583126261Smlaier s->creation = time_second; 3584126261Smlaier s->expire = time_second; 3585126258Smlaier s->timeout = PFTM_UDP_FIRST_PACKET; 3586126258Smlaier pf_set_rt_ifp(s, saddr); 3587130613Smlaier if (sn != NULL) { 3588130613Smlaier s->src_node = sn; 3589130613Smlaier s->src_node->states++; 3590130613Smlaier } 3591130613Smlaier if (nsn != NULL) { 3592130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3593130613Smlaier s->nat_src_node = nsn; 3594130613Smlaier s->nat_src_node->states++; 3595130613Smlaier } 3596130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3597145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3598130613Smlaier pf_src_tree_remove_state(s); 3599145836Smlaier STATE_DEC_COUNTERS(s); 3600126258Smlaier pool_put(&pf_state_pl, s); 3601126258Smlaier return (PF_DROP); 3602126258Smlaier } else 3603126258Smlaier *sm = s; 3604145836Smlaier if (tag > 0) { 3605145836Smlaier pf_tag_ref(tag); 3606145836Smlaier s->tag = tag; 3607145836Smlaier } 3608126258Smlaier } 3609126258Smlaier 3610126258Smlaier /* copy back packet headers if we performed NAT operations */ 3611126258Smlaier if (rewrite) 3612126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3613126258Smlaier 3614126258Smlaier return (PF_PASS); 3615126258Smlaier} 3616126258Smlaier 3617126258Smlaierint 3618126258Smlaierpf_test_icmp(struct pf_rule **rm, struct pf_state **sm, int direction, 3619130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3620145836Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm, 3621145836Smlaier struct ifqueue *ifq) 3622126258Smlaier{ 3623130613Smlaier struct pf_rule *nr = NULL; 3624126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3625126258Smlaier struct pf_rule *r, *a = NULL; 3626126258Smlaier struct pf_ruleset *ruleset = NULL; 3627130613Smlaier struct pf_src_node *nsn = NULL; 3628126258Smlaier u_short reason; 3629127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 3630126258Smlaier sa_family_t af = pd->af; 3631127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 3632127629Smlaier u_int8_t icmpcode = 0; /* make the compiler happy */ 3633126258Smlaier int state_icmp = 0; 3634126258Smlaier struct pf_tag *pftag = NULL; 3635126258Smlaier int tag = -1; 3636126258Smlaier#ifdef INET6 3637126258Smlaier int rewrite = 0; 3638126258Smlaier#endif /* INET6 */ 3639145836Smlaier int asd = 0; 3640126258Smlaier 3641145836Smlaier if (pf_check_congestion(ifq)) { 3642145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3643145836Smlaier return (PF_DROP); 3644145836Smlaier } 3645145836Smlaier 3646126258Smlaier switch (pd->proto) { 3647126258Smlaier#ifdef INET 3648126258Smlaier case IPPROTO_ICMP: 3649126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 3650126258Smlaier icmpcode = pd->hdr.icmp->icmp_code; 3651126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 3652126258Smlaier 3653126258Smlaier if (icmptype == ICMP_UNREACH || 3654126258Smlaier icmptype == ICMP_SOURCEQUENCH || 3655126258Smlaier icmptype == ICMP_REDIRECT || 3656126258Smlaier icmptype == ICMP_TIMXCEED || 3657126258Smlaier icmptype == ICMP_PARAMPROB) 3658126258Smlaier state_icmp++; 3659126258Smlaier break; 3660126258Smlaier#endif /* INET */ 3661126258Smlaier#ifdef INET6 3662126258Smlaier case IPPROTO_ICMPV6: 3663126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 3664126258Smlaier icmpcode = pd->hdr.icmp6->icmp6_code; 3665126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 3666126258Smlaier 3667126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 3668126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 3669126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 3670126258Smlaier icmptype == ICMP6_PARAM_PROB) 3671126258Smlaier state_icmp++; 3672126258Smlaier break; 3673126258Smlaier#endif /* INET6 */ 3674126258Smlaier } 3675126258Smlaier 3676126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3677126258Smlaier 3678126258Smlaier if (direction == PF_OUT) { 3679126258Smlaier /* check outgoing packet for BINAT/NAT */ 3680130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3681139045Sdhartmei saddr, icmpid, daddr, icmpid, &pd->naddr, NULL)) != NULL) { 3682130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3683126258Smlaier switch (af) { 3684126258Smlaier#ifdef INET 3685126258Smlaier case AF_INET: 3686126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 3687130613Smlaier pd->naddr.v4.s_addr, 0); 3688126258Smlaier break; 3689126258Smlaier#endif /* INET */ 3690126258Smlaier#ifdef INET6 3691126258Smlaier case AF_INET6: 3692126258Smlaier pf_change_a6(saddr, &pd->hdr.icmp6->icmp6_cksum, 3693130613Smlaier &pd->naddr, 0); 3694126258Smlaier rewrite++; 3695126258Smlaier break; 3696126258Smlaier#endif /* INET6 */ 3697126258Smlaier } 3698130613Smlaier if (nr->natpass) 3699126258Smlaier r = NULL; 3700130613Smlaier pd->nat_rule = nr; 3701126258Smlaier } 3702126258Smlaier } else { 3703126258Smlaier /* check incoming packet for BINAT/RDR */ 3704130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3705139045Sdhartmei saddr, icmpid, daddr, icmpid, &pd->naddr, NULL)) != NULL) { 3706130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3707126258Smlaier switch (af) { 3708126258Smlaier#ifdef INET 3709126258Smlaier case AF_INET: 3710126258Smlaier pf_change_a(&daddr->v4.s_addr, 3711130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 3712126258Smlaier break; 3713126258Smlaier#endif /* INET */ 3714126258Smlaier#ifdef INET6 3715126258Smlaier case AF_INET6: 3716126258Smlaier pf_change_a6(daddr, &pd->hdr.icmp6->icmp6_cksum, 3717130613Smlaier &pd->naddr, 0); 3718126258Smlaier rewrite++; 3719126258Smlaier break; 3720126258Smlaier#endif /* INET6 */ 3721126258Smlaier } 3722130613Smlaier if (nr->natpass) 3723126258Smlaier r = NULL; 3724130613Smlaier pd->nat_rule = nr; 3725126258Smlaier } 3726126258Smlaier } 3727126258Smlaier 3728126258Smlaier while (r != NULL) { 3729126258Smlaier r->evaluations++; 3730130613Smlaier if (r->kif != NULL && 3731130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3732126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3733126258Smlaier else if (r->direction && r->direction != direction) 3734126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3735126258Smlaier else if (r->af && r->af != af) 3736126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3737126258Smlaier else if (r->proto && r->proto != pd->proto) 3738126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3739145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.neg)) 3740126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3741145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.neg)) 3742126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3743126258Smlaier else if (r->type && r->type != icmptype + 1) 3744126258Smlaier r = TAILQ_NEXT(r, entries); 3745126258Smlaier else if (r->code && r->code != icmpcode + 1) 3746126258Smlaier r = TAILQ_NEXT(r, entries); 3747126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3748126258Smlaier r = TAILQ_NEXT(r, entries); 3749126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3750126258Smlaier r = TAILQ_NEXT(r, entries); 3751145836Smlaier else if (r->prob && r->prob <= arc4random()) 3752126258Smlaier r = TAILQ_NEXT(r, entries); 3753145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 3754126258Smlaier r = TAILQ_NEXT(r, entries); 3755126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3756126258Smlaier r = TAILQ_NEXT(r, entries); 3757126258Smlaier else { 3758126258Smlaier if (r->tag) 3759126258Smlaier tag = r->tag; 3760126258Smlaier if (r->anchor == NULL) { 3761126258Smlaier *rm = r; 3762126258Smlaier *am = a; 3763126258Smlaier *rsm = ruleset; 3764126258Smlaier if ((*rm)->quick) 3765126258Smlaier break; 3766126258Smlaier r = TAILQ_NEXT(r, entries); 3767126258Smlaier } else 3768145836Smlaier pf_step_into_anchor(&asd, &ruleset, 3769145836Smlaier PF_RULESET_FILTER, &r, &a); 3770126258Smlaier } 3771145836Smlaier if (r == NULL) 3772145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 3773145836Smlaier PF_RULESET_FILTER, &r, &a); 3774126258Smlaier } 3775126258Smlaier r = *rm; 3776126258Smlaier a = *am; 3777126258Smlaier ruleset = *rsm; 3778126258Smlaier 3779126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3780126258Smlaier 3781126258Smlaier if (r->log) { 3782126258Smlaier#ifdef INET6 3783126258Smlaier if (rewrite) 3784126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3785126261Smlaier (caddr_t)pd->hdr.icmp6); 3786126258Smlaier#endif /* INET6 */ 3787130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3788126258Smlaier } 3789126258Smlaier 3790126258Smlaier if (r->action != PF_PASS) 3791126258Smlaier return (PF_DROP); 3792126258Smlaier 3793126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3794126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3795126258Smlaier return (PF_DROP); 3796126258Smlaier } 3797126258Smlaier 3798130613Smlaier if (!state_icmp && (r->keep_state || nr != NULL)) { 3799126258Smlaier /* create new state */ 3800126258Smlaier struct pf_state *s = NULL; 3801130613Smlaier struct pf_src_node *sn = NULL; 3802126258Smlaier 3803130613Smlaier /* check maximums */ 3804145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 3805145836Smlaier pf_status.lcounters[LCNT_STATES]++; 3806145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 3807130613Smlaier goto cleanup; 3808145836Smlaier } 3809130613Smlaier /* src node for flter rule */ 3810130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3811130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3812145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 3813145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3814130613Smlaier goto cleanup; 3815145836Smlaier } 3816130613Smlaier /* src node for translation rule */ 3817130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3818130613Smlaier ((direction == PF_OUT && 3819130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3820145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 3821145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 3822130613Smlaier goto cleanup; 3823145836Smlaier } 3824130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3825126258Smlaier if (s == NULL) { 3826145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 3827130613Smlaiercleanup: 3828130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3829130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3830130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3831130613Smlaier pf_status.src_nodes--; 3832130613Smlaier pool_put(&pf_src_tree_pl, sn); 3833130613Smlaier } 3834130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3835130613Smlaier nsn->expire == 0) { 3836130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3837130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3838130613Smlaier pf_status.src_nodes--; 3839130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3840130613Smlaier } 3841126258Smlaier return (PF_DROP); 3842126258Smlaier } 3843126258Smlaier bzero(s, sizeof(*s)); 3844126258Smlaier s->rule.ptr = r; 3845130613Smlaier s->nat_rule.ptr = nr; 3846126258Smlaier s->anchor.ptr = a; 3847145836Smlaier STATE_INC_COUNTERS(s); 3848126258Smlaier s->allow_opts = r->allow_opts; 3849126258Smlaier s->log = r->log & 2; 3850126258Smlaier s->proto = pd->proto; 3851126258Smlaier s->direction = direction; 3852126258Smlaier s->af = af; 3853126258Smlaier if (direction == PF_OUT) { 3854126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3855126258Smlaier s->gwy.port = icmpid; 3856126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3857126258Smlaier s->ext.port = icmpid; 3858130613Smlaier if (nr != NULL) 3859130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3860126258Smlaier else 3861126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3862126258Smlaier s->lan.port = icmpid; 3863126258Smlaier } else { 3864126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3865126258Smlaier s->lan.port = icmpid; 3866126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3867126258Smlaier s->ext.port = icmpid; 3868130613Smlaier if (nr != NULL) 3869130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3870126258Smlaier else 3871126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3872126258Smlaier s->gwy.port = icmpid; 3873126258Smlaier } 3874126261Smlaier s->creation = time_second; 3875126261Smlaier s->expire = time_second; 3876126258Smlaier s->timeout = PFTM_ICMP_FIRST_PACKET; 3877126258Smlaier pf_set_rt_ifp(s, saddr); 3878130613Smlaier if (sn != NULL) { 3879130613Smlaier s->src_node = sn; 3880130613Smlaier s->src_node->states++; 3881130613Smlaier } 3882130613Smlaier if (nsn != NULL) { 3883130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3884130613Smlaier s->nat_src_node = nsn; 3885130613Smlaier s->nat_src_node->states++; 3886130613Smlaier } 3887130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3888145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 3889130613Smlaier pf_src_tree_remove_state(s); 3890145836Smlaier STATE_DEC_COUNTERS(s); 3891126258Smlaier pool_put(&pf_state_pl, s); 3892126258Smlaier return (PF_DROP); 3893126258Smlaier } else 3894126258Smlaier *sm = s; 3895145836Smlaier if (tag > 0) { 3896145836Smlaier pf_tag_ref(tag); 3897145836Smlaier s->tag = tag; 3898145836Smlaier } 3899126258Smlaier } 3900126258Smlaier 3901126258Smlaier#ifdef INET6 3902126258Smlaier /* copy back packet headers if we performed IPv6 NAT operations */ 3903126258Smlaier if (rewrite) 3904126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3905126261Smlaier (caddr_t)pd->hdr.icmp6); 3906126258Smlaier#endif /* INET6 */ 3907126258Smlaier 3908126258Smlaier return (PF_PASS); 3909126258Smlaier} 3910126258Smlaier 3911126258Smlaierint 3912126258Smlaierpf_test_other(struct pf_rule **rm, struct pf_state **sm, int direction, 3913130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 3914145836Smlaier struct pf_rule **am, struct pf_ruleset **rsm, struct ifqueue *ifq) 3915126258Smlaier{ 3916130613Smlaier struct pf_rule *nr = NULL; 3917126258Smlaier struct pf_rule *r, *a = NULL; 3918126258Smlaier struct pf_ruleset *ruleset = NULL; 3919130613Smlaier struct pf_src_node *nsn = NULL; 3920126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3921126258Smlaier sa_family_t af = pd->af; 3922126258Smlaier u_short reason; 3923126258Smlaier struct pf_tag *pftag = NULL; 3924126258Smlaier int tag = -1; 3925145836Smlaier int asd = 0; 3926126258Smlaier 3927145836Smlaier if (pf_check_congestion(ifq)) { 3928145836Smlaier REASON_SET(&reason, PFRES_CONGEST); 3929145836Smlaier return (PF_DROP); 3930145836Smlaier } 3931145836Smlaier 3932126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3933126258Smlaier 3934126258Smlaier if (direction == PF_OUT) { 3935126258Smlaier /* check outgoing packet for BINAT/NAT */ 3936130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3937130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3938130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3939126258Smlaier switch (af) { 3940126258Smlaier#ifdef INET 3941126258Smlaier case AF_INET: 3942126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 3943130613Smlaier pd->naddr.v4.s_addr, 0); 3944126258Smlaier break; 3945126258Smlaier#endif /* INET */ 3946126258Smlaier#ifdef INET6 3947126258Smlaier case AF_INET6: 3948130613Smlaier PF_ACPY(saddr, &pd->naddr, af); 3949126258Smlaier break; 3950126258Smlaier#endif /* INET6 */ 3951126258Smlaier } 3952130613Smlaier if (nr->natpass) 3953126258Smlaier r = NULL; 3954130613Smlaier pd->nat_rule = nr; 3955126258Smlaier } 3956126258Smlaier } else { 3957126258Smlaier /* check incoming packet for BINAT/RDR */ 3958130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3959130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3960130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3961126258Smlaier switch (af) { 3962126258Smlaier#ifdef INET 3963126258Smlaier case AF_INET: 3964126258Smlaier pf_change_a(&daddr->v4.s_addr, 3965130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 3966126258Smlaier break; 3967126258Smlaier#endif /* INET */ 3968126258Smlaier#ifdef INET6 3969126258Smlaier case AF_INET6: 3970130613Smlaier PF_ACPY(daddr, &pd->naddr, af); 3971126258Smlaier break; 3972126258Smlaier#endif /* INET6 */ 3973126258Smlaier } 3974130613Smlaier if (nr->natpass) 3975126258Smlaier r = NULL; 3976130613Smlaier pd->nat_rule = nr; 3977126258Smlaier } 3978126258Smlaier } 3979126258Smlaier 3980126258Smlaier while (r != NULL) { 3981126258Smlaier r->evaluations++; 3982130613Smlaier if (r->kif != NULL && 3983130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3984126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3985126258Smlaier else if (r->direction && r->direction != direction) 3986126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3987126258Smlaier else if (r->af && r->af != af) 3988126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3989126258Smlaier else if (r->proto && r->proto != pd->proto) 3990126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3991145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.neg)) 3992126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3993145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.neg)) 3994126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3995126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3996126258Smlaier r = TAILQ_NEXT(r, entries); 3997126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3998126258Smlaier r = TAILQ_NEXT(r, entries); 3999145836Smlaier else if (r->prob && r->prob <= arc4random()) 4000126258Smlaier r = TAILQ_NEXT(r, entries); 4001145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 4002126258Smlaier r = TAILQ_NEXT(r, entries); 4003126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 4004126258Smlaier r = TAILQ_NEXT(r, entries); 4005126258Smlaier else { 4006126258Smlaier if (r->tag) 4007126258Smlaier tag = r->tag; 4008126258Smlaier if (r->anchor == NULL) { 4009126258Smlaier *rm = r; 4010126258Smlaier *am = a; 4011126258Smlaier *rsm = ruleset; 4012126258Smlaier if ((*rm)->quick) 4013126258Smlaier break; 4014126258Smlaier r = TAILQ_NEXT(r, entries); 4015126258Smlaier } else 4016145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4017145836Smlaier PF_RULESET_FILTER, &r, &a); 4018126258Smlaier } 4019145836Smlaier if (r == NULL) 4020145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 4021145836Smlaier PF_RULESET_FILTER, &r, &a); 4022126258Smlaier } 4023126258Smlaier r = *rm; 4024126258Smlaier a = *am; 4025126258Smlaier ruleset = *rsm; 4026126258Smlaier 4027126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4028130613Smlaier 4029126258Smlaier if (r->log) 4030130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 4031126258Smlaier 4032126258Smlaier if ((r->action == PF_DROP) && 4033126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 4034126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 4035126258Smlaier struct pf_addr *a = NULL; 4036126258Smlaier 4037130613Smlaier if (nr != NULL) { 4038130613Smlaier if (direction == PF_OUT) 4039130613Smlaier a = saddr; 4040130613Smlaier else 4041130613Smlaier a = daddr; 4042130613Smlaier } 4043126258Smlaier if (a != NULL) { 4044126258Smlaier switch (af) { 4045126258Smlaier#ifdef INET 4046126258Smlaier case AF_INET: 4047126258Smlaier pf_change_a(&a->v4.s_addr, pd->ip_sum, 4048130613Smlaier pd->baddr.v4.s_addr, 0); 4049126258Smlaier break; 4050126258Smlaier#endif /* INET */ 4051126258Smlaier#ifdef INET6 4052126258Smlaier case AF_INET6: 4053130613Smlaier PF_ACPY(a, &pd->baddr, af); 4054126258Smlaier break; 4055126258Smlaier#endif /* INET6 */ 4056126258Smlaier } 4057126258Smlaier } 4058126258Smlaier if ((af == AF_INET) && r->return_icmp) 4059126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 4060126258Smlaier r->return_icmp & 255, af, r); 4061126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 4062126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 4063126258Smlaier r->return_icmp6 & 255, af, r); 4064126258Smlaier } 4065126258Smlaier 4066126258Smlaier if (r->action != PF_PASS) 4067126258Smlaier return (PF_DROP); 4068126258Smlaier 4069126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 4070126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4071126258Smlaier return (PF_DROP); 4072126258Smlaier } 4073126258Smlaier 4074130613Smlaier if (r->keep_state || nr != NULL) { 4075126258Smlaier /* create new state */ 4076126258Smlaier struct pf_state *s = NULL; 4077130613Smlaier struct pf_src_node *sn = NULL; 4078126258Smlaier 4079130613Smlaier /* check maximums */ 4080145836Smlaier if (r->max_states && (r->states >= r->max_states)) { 4081145836Smlaier pf_status.lcounters[LCNT_STATES]++; 4082145836Smlaier REASON_SET(&reason, PFRES_MAXSTATES); 4083130613Smlaier goto cleanup; 4084145836Smlaier } 4085130613Smlaier /* src node for flter rule */ 4086130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 4087130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 4088145836Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) { 4089145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4090130613Smlaier goto cleanup; 4091145836Smlaier } 4092130613Smlaier /* src node for translation rule */ 4093130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 4094130613Smlaier ((direction == PF_OUT && 4095130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 4096145836Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) { 4097145836Smlaier REASON_SET(&reason, PFRES_SRCLIMIT); 4098130613Smlaier goto cleanup; 4099145836Smlaier } 4100130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 4101126258Smlaier if (s == NULL) { 4102145836Smlaier REASON_SET(&reason, PFRES_MEMORY); 4103130613Smlaiercleanup: 4104130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 4105130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 4106130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4107130613Smlaier pf_status.src_nodes--; 4108130613Smlaier pool_put(&pf_src_tree_pl, sn); 4109130613Smlaier } 4110130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 4111130613Smlaier nsn->expire == 0) { 4112130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 4113130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 4114130613Smlaier pf_status.src_nodes--; 4115130613Smlaier pool_put(&pf_src_tree_pl, nsn); 4116130613Smlaier } 4117126258Smlaier return (PF_DROP); 4118126258Smlaier } 4119126258Smlaier bzero(s, sizeof(*s)); 4120126258Smlaier s->rule.ptr = r; 4121130613Smlaier s->nat_rule.ptr = nr; 4122126258Smlaier s->anchor.ptr = a; 4123145836Smlaier STATE_INC_COUNTERS(s); 4124126258Smlaier s->allow_opts = r->allow_opts; 4125126258Smlaier s->log = r->log & 2; 4126126258Smlaier s->proto = pd->proto; 4127126258Smlaier s->direction = direction; 4128126258Smlaier s->af = af; 4129126258Smlaier if (direction == PF_OUT) { 4130126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 4131126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 4132130613Smlaier if (nr != NULL) 4133130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 4134126258Smlaier else 4135126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 4136126258Smlaier } else { 4137126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 4138126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 4139130613Smlaier if (nr != NULL) 4140130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 4141126258Smlaier else 4142126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 4143126258Smlaier } 4144126258Smlaier s->src.state = PFOTHERS_SINGLE; 4145126258Smlaier s->dst.state = PFOTHERS_NO_TRAFFIC; 4146126261Smlaier s->creation = time_second; 4147126261Smlaier s->expire = time_second; 4148126258Smlaier s->timeout = PFTM_OTHER_FIRST_PACKET; 4149126258Smlaier pf_set_rt_ifp(s, saddr); 4150130613Smlaier if (sn != NULL) { 4151130613Smlaier s->src_node = sn; 4152130613Smlaier s->src_node->states++; 4153130613Smlaier } 4154130613Smlaier if (nsn != NULL) { 4155130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 4156130613Smlaier s->nat_src_node = nsn; 4157130613Smlaier s->nat_src_node->states++; 4158130613Smlaier } 4159130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 4160145836Smlaier REASON_SET(&reason, PFRES_STATEINS); 4161130613Smlaier pf_src_tree_remove_state(s); 4162145836Smlaier STATE_DEC_COUNTERS(s); 4163126258Smlaier pool_put(&pf_state_pl, s); 4164126258Smlaier return (PF_DROP); 4165126258Smlaier } else 4166126258Smlaier *sm = s; 4167145836Smlaier if (tag > 0) { 4168145836Smlaier pf_tag_ref(tag); 4169145836Smlaier s->tag = tag; 4170145836Smlaier } 4171126258Smlaier } 4172126258Smlaier 4173126258Smlaier return (PF_PASS); 4174126258Smlaier} 4175126258Smlaier 4176126258Smlaierint 4177130613Smlaierpf_test_fragment(struct pf_rule **rm, int direction, struct pfi_kif *kif, 4178126258Smlaier struct mbuf *m, void *h, struct pf_pdesc *pd, struct pf_rule **am, 4179126258Smlaier struct pf_ruleset **rsm) 4180126258Smlaier{ 4181126258Smlaier struct pf_rule *r, *a = NULL; 4182126258Smlaier struct pf_ruleset *ruleset = NULL; 4183126258Smlaier sa_family_t af = pd->af; 4184126258Smlaier u_short reason; 4185126258Smlaier struct pf_tag *pftag = NULL; 4186126258Smlaier int tag = -1; 4187145836Smlaier int asd = 0; 4188126258Smlaier 4189126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 4190126258Smlaier while (r != NULL) { 4191126258Smlaier r->evaluations++; 4192130613Smlaier if (r->kif != NULL && 4193130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 4194126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 4195126258Smlaier else if (r->direction && r->direction != direction) 4196126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 4197126258Smlaier else if (r->af && r->af != af) 4198126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 4199126258Smlaier else if (r->proto && r->proto != pd->proto) 4200126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 4201145836Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.neg)) 4202126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 4203145836Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.neg)) 4204126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 4205126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 4206126258Smlaier r = TAILQ_NEXT(r, entries); 4207126258Smlaier else if (r->src.port_op || r->dst.port_op || 4208126258Smlaier r->flagset || r->type || r->code || 4209126258Smlaier r->os_fingerprint != PF_OSFP_ANY) 4210126258Smlaier r = TAILQ_NEXT(r, entries); 4211145836Smlaier else if (r->prob && r->prob <= arc4random()) 4212126258Smlaier r = TAILQ_NEXT(r, entries); 4213145836Smlaier else if (r->match_tag && !pf_match_tag(m, r, &pftag, &tag)) 4214126258Smlaier r = TAILQ_NEXT(r, entries); 4215126258Smlaier else { 4216126258Smlaier if (r->anchor == NULL) { 4217126258Smlaier *rm = r; 4218126258Smlaier *am = a; 4219126258Smlaier *rsm = ruleset; 4220126258Smlaier if ((*rm)->quick) 4221126258Smlaier break; 4222126258Smlaier r = TAILQ_NEXT(r, entries); 4223126258Smlaier } else 4224145836Smlaier pf_step_into_anchor(&asd, &ruleset, 4225145836Smlaier PF_RULESET_FILTER, &r, &a); 4226126258Smlaier } 4227145836Smlaier if (r == NULL) 4228145836Smlaier pf_step_out_of_anchor(&asd, &ruleset, 4229145836Smlaier PF_RULESET_FILTER, &r, &a); 4230126258Smlaier } 4231126258Smlaier r = *rm; 4232126258Smlaier a = *am; 4233126258Smlaier ruleset = *rsm; 4234126258Smlaier 4235126258Smlaier REASON_SET(&reason, PFRES_MATCH); 4236130613Smlaier 4237126258Smlaier if (r->log) 4238130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 4239126258Smlaier 4240126258Smlaier if (r->action != PF_PASS) 4241126258Smlaier return (PF_DROP); 4242126258Smlaier 4243126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 4244126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 4245126258Smlaier return (PF_DROP); 4246126258Smlaier } 4247126258Smlaier 4248126258Smlaier return (PF_PASS); 4249126258Smlaier} 4250126258Smlaier 4251126258Smlaierint 4252130613Smlaierpf_test_state_tcp(struct pf_state **state, int direction, struct pfi_kif *kif, 4253130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 4254126258Smlaier u_short *reason) 4255126258Smlaier{ 4256130613Smlaier struct pf_state key; 4257126258Smlaier struct tcphdr *th = pd->hdr.tcp; 4258126258Smlaier u_int16_t win = ntohs(th->th_win); 4259145836Smlaier u_int32_t ack, end, seq, orig_seq; 4260126258Smlaier u_int8_t sws, dws; 4261130613Smlaier int ackskew; 4262126258Smlaier int copyback = 0; 4263126258Smlaier struct pf_state_peer *src, *dst; 4264126258Smlaier 4265126258Smlaier key.af = pd->af; 4266126258Smlaier key.proto = IPPROTO_TCP; 4267130613Smlaier if (direction == PF_IN) { 4268130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4269130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4270130613Smlaier key.ext.port = th->th_sport; 4271130613Smlaier key.gwy.port = th->th_dport; 4272130613Smlaier } else { 4273130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4274130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4275130613Smlaier key.lan.port = th->th_sport; 4276130613Smlaier key.ext.port = th->th_dport; 4277130613Smlaier } 4278126258Smlaier 4279126258Smlaier STATE_LOOKUP(); 4280126258Smlaier 4281126258Smlaier if (direction == (*state)->direction) { 4282126258Smlaier src = &(*state)->src; 4283126258Smlaier dst = &(*state)->dst; 4284126258Smlaier } else { 4285126258Smlaier src = &(*state)->dst; 4286126258Smlaier dst = &(*state)->src; 4287126258Smlaier } 4288126258Smlaier 4289126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_SRC) { 4290145836Smlaier if (direction != (*state)->direction) { 4291145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4292126258Smlaier return (PF_SYNPROXY_DROP); 4293145836Smlaier } 4294126258Smlaier if (th->th_flags & TH_SYN) { 4295145836Smlaier if (ntohl(th->th_seq) != (*state)->src.seqlo) { 4296145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4297126258Smlaier return (PF_DROP); 4298145836Smlaier } 4299126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4300126258Smlaier pd->src, th->th_dport, th->th_sport, 4301126258Smlaier (*state)->src.seqhi, ntohl(th->th_seq) + 1, 4302145836Smlaier TH_SYN|TH_ACK, 0, (*state)->src.mss, 0, 1, 4303145836Smlaier NULL, NULL); 4304145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4305126258Smlaier return (PF_SYNPROXY_DROP); 4306126258Smlaier } else if (!(th->th_flags & TH_ACK) || 4307126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4308145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4309145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4310126258Smlaier return (PF_DROP); 4311145836Smlaier } else if ((*state)->src_node != NULL && 4312145836Smlaier pf_src_connlimit(state)) { 4313145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 4314145836Smlaier return (PF_DROP); 4315145836Smlaier } else 4316126258Smlaier (*state)->src.state = PF_TCPS_PROXY_DST; 4317126258Smlaier } 4318126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_DST) { 4319126258Smlaier struct pf_state_host *src, *dst; 4320126258Smlaier 4321126258Smlaier if (direction == PF_OUT) { 4322126258Smlaier src = &(*state)->gwy; 4323126258Smlaier dst = &(*state)->ext; 4324126258Smlaier } else { 4325126258Smlaier src = &(*state)->ext; 4326126258Smlaier dst = &(*state)->lan; 4327126258Smlaier } 4328126258Smlaier if (direction == (*state)->direction) { 4329126258Smlaier if (((th->th_flags & (TH_SYN|TH_ACK)) != TH_ACK) || 4330126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 4331145836Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) { 4332145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4333126258Smlaier return (PF_DROP); 4334145836Smlaier } 4335126258Smlaier (*state)->src.max_win = MAX(ntohs(th->th_win), 1); 4336126258Smlaier if ((*state)->dst.seqhi == 1) 4337145836Smlaier (*state)->dst.seqhi = htonl(arc4random()); 4338126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4339126258Smlaier &dst->addr, src->port, dst->port, 4340130613Smlaier (*state)->dst.seqhi, 0, TH_SYN, 0, 4341145836Smlaier (*state)->src.mss, 0, 0, NULL, NULL); 4342145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4343126258Smlaier return (PF_SYNPROXY_DROP); 4344126258Smlaier } else if (((th->th_flags & (TH_SYN|TH_ACK)) != 4345126258Smlaier (TH_SYN|TH_ACK)) || 4346145836Smlaier (ntohl(th->th_ack) != (*state)->dst.seqhi + 1)) { 4347145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4348126258Smlaier return (PF_DROP); 4349145836Smlaier } else { 4350126258Smlaier (*state)->dst.max_win = MAX(ntohs(th->th_win), 1); 4351126258Smlaier (*state)->dst.seqlo = ntohl(th->th_seq); 4352126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 4353126258Smlaier pd->src, th->th_dport, th->th_sport, 4354126258Smlaier ntohl(th->th_ack), ntohl(th->th_seq) + 1, 4355145836Smlaier TH_ACK, (*state)->src.max_win, 0, 0, 0, 4356145836Smlaier NULL, NULL); 4357126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 4358126258Smlaier &dst->addr, src->port, dst->port, 4359126258Smlaier (*state)->src.seqhi + 1, (*state)->src.seqlo + 1, 4360145836Smlaier TH_ACK, (*state)->dst.max_win, 0, 0, 1, 4361145836Smlaier NULL, NULL); 4362126258Smlaier (*state)->src.seqdiff = (*state)->dst.seqhi - 4363126258Smlaier (*state)->src.seqlo; 4364126258Smlaier (*state)->dst.seqdiff = (*state)->src.seqhi - 4365126258Smlaier (*state)->dst.seqlo; 4366126258Smlaier (*state)->src.seqhi = (*state)->src.seqlo + 4367145875Smlaier (*state)->dst.max_win; 4368145875Smlaier (*state)->dst.seqhi = (*state)->dst.seqlo + 4369145836Smlaier (*state)->src.max_win; 4370126258Smlaier (*state)->src.wscale = (*state)->dst.wscale = 0; 4371126258Smlaier (*state)->src.state = (*state)->dst.state = 4372126258Smlaier TCPS_ESTABLISHED; 4373145836Smlaier REASON_SET(reason, PFRES_SYNPROXY); 4374126258Smlaier return (PF_SYNPROXY_DROP); 4375126258Smlaier } 4376126258Smlaier } 4377126258Smlaier 4378126258Smlaier if (src->wscale && dst->wscale && !(th->th_flags & TH_SYN)) { 4379126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4380126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4381126258Smlaier } else 4382126258Smlaier sws = dws = 0; 4383126258Smlaier 4384126258Smlaier /* 4385126258Smlaier * Sequence tracking algorithm from Guido van Rooij's paper: 4386126258Smlaier * http://www.madison-gurkha.com/publications/tcp_filtering/ 4387126258Smlaier * tcp_filtering.ps 4388126258Smlaier */ 4389126258Smlaier 4390145836Smlaier orig_seq = seq = ntohl(th->th_seq); 4391126258Smlaier if (src->seqlo == 0) { 4392126258Smlaier /* First packet from this end. Set its state */ 4393126258Smlaier 4394126258Smlaier if ((pd->flags & PFDESC_TCP_NORM || dst->scrub) && 4395126258Smlaier src->scrub == NULL) { 4396126258Smlaier if (pf_normalize_tcp_init(m, off, pd, th, src, dst)) { 4397126258Smlaier REASON_SET(reason, PFRES_MEMORY); 4398126258Smlaier return (PF_DROP); 4399126258Smlaier } 4400126258Smlaier } 4401126258Smlaier 4402126258Smlaier /* Deferred generation of sequence number modulator */ 4403126258Smlaier if (dst->seqdiff && !src->seqdiff) { 4404145836Smlaier while ((src->seqdiff = htonl(arc4random())) == 0) 4405126258Smlaier ; 4406126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4407126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4408126258Smlaier src->seqdiff), 0); 4409126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4410126258Smlaier copyback = 1; 4411126258Smlaier } else { 4412126258Smlaier ack = ntohl(th->th_ack); 4413126258Smlaier } 4414126258Smlaier 4415126258Smlaier end = seq + pd->p_len; 4416126258Smlaier if (th->th_flags & TH_SYN) { 4417126258Smlaier end++; 4418126258Smlaier if (dst->wscale & PF_WSCALE_FLAG) { 4419126258Smlaier src->wscale = pf_get_wscale(m, off, th->th_off, 4420126258Smlaier pd->af); 4421126258Smlaier if (src->wscale & PF_WSCALE_FLAG) { 4422126258Smlaier /* Remove scale factor from initial 4423126258Smlaier * window */ 4424126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4425126258Smlaier win = ((u_int32_t)win + (1 << sws) - 1) 4426126258Smlaier >> sws; 4427126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4428126258Smlaier } else { 4429126258Smlaier /* fixup other window */ 4430126258Smlaier dst->max_win <<= dst->wscale & 4431126258Smlaier PF_WSCALE_MASK; 4432126258Smlaier /* in case of a retrans SYN|ACK */ 4433126258Smlaier dst->wscale = 0; 4434126258Smlaier } 4435126258Smlaier } 4436126258Smlaier } 4437126258Smlaier if (th->th_flags & TH_FIN) 4438126258Smlaier end++; 4439126258Smlaier 4440126258Smlaier src->seqlo = seq; 4441126258Smlaier if (src->state < TCPS_SYN_SENT) 4442126258Smlaier src->state = TCPS_SYN_SENT; 4443126258Smlaier 4444126258Smlaier /* 4445126258Smlaier * May need to slide the window (seqhi may have been set by 4446126258Smlaier * the crappy stack check or if we picked up the connection 4447126258Smlaier * after establishment) 4448126258Smlaier */ 4449126258Smlaier if (src->seqhi == 1 || 4450126258Smlaier SEQ_GEQ(end + MAX(1, dst->max_win << dws), src->seqhi)) 4451126258Smlaier src->seqhi = end + MAX(1, dst->max_win << dws); 4452126258Smlaier if (win > src->max_win) 4453126258Smlaier src->max_win = win; 4454126258Smlaier 4455126258Smlaier } else { 4456126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4457126258Smlaier if (src->seqdiff) { 4458126258Smlaier /* Modulate sequence numbers */ 4459126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4460126258Smlaier src->seqdiff), 0); 4461126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4462126258Smlaier copyback = 1; 4463126258Smlaier } 4464126258Smlaier end = seq + pd->p_len; 4465126258Smlaier if (th->th_flags & TH_SYN) 4466126258Smlaier end++; 4467126258Smlaier if (th->th_flags & TH_FIN) 4468126258Smlaier end++; 4469126258Smlaier } 4470126258Smlaier 4471126258Smlaier if ((th->th_flags & TH_ACK) == 0) { 4472126258Smlaier /* Let it pass through the ack skew check */ 4473126258Smlaier ack = dst->seqlo; 4474126258Smlaier } else if ((ack == 0 && 4475126258Smlaier (th->th_flags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) || 4476126258Smlaier /* broken tcp stacks do not set ack */ 4477126258Smlaier (dst->state < TCPS_SYN_SENT)) { 4478126258Smlaier /* 4479126258Smlaier * Many stacks (ours included) will set the ACK number in an 4480126258Smlaier * FIN|ACK if the SYN times out -- no sequence to ACK. 4481126258Smlaier */ 4482126258Smlaier ack = dst->seqlo; 4483126258Smlaier } 4484126258Smlaier 4485126258Smlaier if (seq == end) { 4486126258Smlaier /* Ease sequencing restrictions on no data packets */ 4487126258Smlaier seq = src->seqlo; 4488126258Smlaier end = seq; 4489126258Smlaier } 4490126258Smlaier 4491126258Smlaier ackskew = dst->seqlo - ack; 4492126258Smlaier 4493126258Smlaier#define MAXACKWINDOW (0xffff + 1500) /* 1500 is an arbitrary fudge factor */ 4494126258Smlaier if (SEQ_GEQ(src->seqhi, end) && 4495126258Smlaier /* Last octet inside other's window space */ 4496126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) && 4497126258Smlaier /* Retrans: not more than one window back */ 4498126258Smlaier (ackskew >= -MAXACKWINDOW) && 4499126258Smlaier /* Acking not more than one reassembled fragment backwards */ 4500145836Smlaier (ackskew <= (MAXACKWINDOW << sws)) && 4501126258Smlaier /* Acking not more than one window forward */ 4502145836Smlaier ((th->th_flags & TH_RST) == 0 || orig_seq == src->seqlo || 4503145836Smlaier (pd->flags & PFDESC_IP_REAS) == 0)) { 4504145836Smlaier /* Require an exact sequence match on resets when possible */ 4505126258Smlaier 4506145836Smlaier if (dst->scrub || src->scrub) { 4507145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4508145836Smlaier *state, src, dst, ©back)) 4509145836Smlaier return (PF_DROP); 4510145836Smlaier } 4511145836Smlaier 4512126258Smlaier /* update max window */ 4513126258Smlaier if (src->max_win < win) 4514126258Smlaier src->max_win = win; 4515126258Smlaier /* synchronize sequencing */ 4516126258Smlaier if (SEQ_GT(end, src->seqlo)) 4517126258Smlaier src->seqlo = end; 4518126258Smlaier /* slide the window of what the other end can send */ 4519126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4520126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4521126258Smlaier 4522126258Smlaier 4523126258Smlaier /* update states */ 4524126258Smlaier if (th->th_flags & TH_SYN) 4525126258Smlaier if (src->state < TCPS_SYN_SENT) 4526126258Smlaier src->state = TCPS_SYN_SENT; 4527126258Smlaier if (th->th_flags & TH_FIN) 4528126258Smlaier if (src->state < TCPS_CLOSING) 4529126258Smlaier src->state = TCPS_CLOSING; 4530126258Smlaier if (th->th_flags & TH_ACK) { 4531145836Smlaier if (dst->state == TCPS_SYN_SENT) { 4532126258Smlaier dst->state = TCPS_ESTABLISHED; 4533145836Smlaier if (src->state == TCPS_ESTABLISHED && 4534145836Smlaier (*state)->src_node != NULL && 4535145836Smlaier pf_src_connlimit(state)) { 4536145836Smlaier REASON_SET(reason, PFRES_SRCLIMIT); 4537145836Smlaier return (PF_DROP); 4538145836Smlaier } 4539145836Smlaier } else if (dst->state == TCPS_CLOSING) 4540126258Smlaier dst->state = TCPS_FIN_WAIT_2; 4541126258Smlaier } 4542126258Smlaier if (th->th_flags & TH_RST) 4543126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4544126258Smlaier 4545126258Smlaier /* update expire time */ 4546126261Smlaier (*state)->expire = time_second; 4547126258Smlaier if (src->state >= TCPS_FIN_WAIT_2 && 4548126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4549126258Smlaier (*state)->timeout = PFTM_TCP_CLOSED; 4550126258Smlaier else if (src->state >= TCPS_FIN_WAIT_2 || 4551126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4552126258Smlaier (*state)->timeout = PFTM_TCP_FIN_WAIT; 4553126258Smlaier else if (src->state < TCPS_ESTABLISHED || 4554126258Smlaier dst->state < TCPS_ESTABLISHED) 4555126258Smlaier (*state)->timeout = PFTM_TCP_OPENING; 4556126258Smlaier else if (src->state >= TCPS_CLOSING || 4557126258Smlaier dst->state >= TCPS_CLOSING) 4558126258Smlaier (*state)->timeout = PFTM_TCP_CLOSING; 4559126258Smlaier else 4560126258Smlaier (*state)->timeout = PFTM_TCP_ESTABLISHED; 4561126258Smlaier 4562126258Smlaier /* Fall through to PASS packet */ 4563126258Smlaier 4564126258Smlaier } else if ((dst->state < TCPS_SYN_SENT || 4565126258Smlaier dst->state >= TCPS_FIN_WAIT_2 || 4566126258Smlaier src->state >= TCPS_FIN_WAIT_2) && 4567126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) && 4568126258Smlaier /* Within a window forward of the originating packet */ 4569126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW)) { 4570126258Smlaier /* Within a window backward of the originating packet */ 4571126258Smlaier 4572126258Smlaier /* 4573126258Smlaier * This currently handles three situations: 4574126258Smlaier * 1) Stupid stacks will shotgun SYNs before their peer 4575126258Smlaier * replies. 4576126258Smlaier * 2) When PF catches an already established stream (the 4577126258Smlaier * firewall rebooted, the state table was flushed, routes 4578126258Smlaier * changed...) 4579126258Smlaier * 3) Packets get funky immediately after the connection 4580126258Smlaier * closes (this should catch Solaris spurious ACK|FINs 4581126258Smlaier * that web servers like to spew after a close) 4582126258Smlaier * 4583126258Smlaier * This must be a little more careful than the above code 4584126258Smlaier * since packet floods will also be caught here. We don't 4585126258Smlaier * update the TTL here to mitigate the damage of a packet 4586126258Smlaier * flood and so the same code can handle awkward establishment 4587126258Smlaier * and a loosened connection close. 4588126258Smlaier * In the establishment case, a correct peer response will 4589126258Smlaier * validate the connection, go through the normal state code 4590126258Smlaier * and keep updating the state TTL. 4591126258Smlaier */ 4592126258Smlaier 4593126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 4594126258Smlaier printf("pf: loose state match: "); 4595126258Smlaier pf_print_state(*state); 4596126258Smlaier pf_print_flags(th->th_flags); 4597126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d\n", 4598126258Smlaier seq, ack, pd->p_len, ackskew, 4599126258Smlaier (*state)->packets[0], (*state)->packets[1]); 4600126258Smlaier } 4601126258Smlaier 4602145836Smlaier if (dst->scrub || src->scrub) { 4603145836Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4604145836Smlaier *state, src, dst, ©back)) 4605145836Smlaier return (PF_DROP); 4606145836Smlaier } 4607145836Smlaier 4608126258Smlaier /* update max window */ 4609126258Smlaier if (src->max_win < win) 4610126258Smlaier src->max_win = win; 4611126258Smlaier /* synchronize sequencing */ 4612126258Smlaier if (SEQ_GT(end, src->seqlo)) 4613126258Smlaier src->seqlo = end; 4614126258Smlaier /* slide the window of what the other end can send */ 4615126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4616126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4617126258Smlaier 4618126258Smlaier /* 4619126258Smlaier * Cannot set dst->seqhi here since this could be a shotgunned 4620126258Smlaier * SYN and not an already established connection. 4621126258Smlaier */ 4622126258Smlaier 4623126258Smlaier if (th->th_flags & TH_FIN) 4624126258Smlaier if (src->state < TCPS_CLOSING) 4625126258Smlaier src->state = TCPS_CLOSING; 4626126258Smlaier if (th->th_flags & TH_RST) 4627126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4628126258Smlaier 4629126258Smlaier /* Fall through to PASS packet */ 4630126258Smlaier 4631126258Smlaier } else { 4632126258Smlaier if ((*state)->dst.state == TCPS_SYN_SENT && 4633126258Smlaier (*state)->src.state == TCPS_SYN_SENT) { 4634126258Smlaier /* Send RST for state mismatches during handshake */ 4635145836Smlaier if (!(th->th_flags & TH_RST)) 4636126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, 4637126258Smlaier pd->dst, pd->src, th->th_dport, 4638145836Smlaier th->th_sport, ntohl(th->th_ack), 0, 4639145836Smlaier TH_RST, 0, 0, 4640145836Smlaier (*state)->rule.ptr->return_ttl, 1, 4641145836Smlaier pd->eh, kif->pfik_ifp); 4642126258Smlaier src->seqlo = 0; 4643126258Smlaier src->seqhi = 1; 4644126258Smlaier src->max_win = 1; 4645126258Smlaier } else if (pf_status.debug >= PF_DEBUG_MISC) { 4646126258Smlaier printf("pf: BAD state: "); 4647126258Smlaier pf_print_state(*state); 4648126258Smlaier pf_print_flags(th->th_flags); 4649126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d " 4650126258Smlaier "dir=%s,%s\n", seq, ack, pd->p_len, ackskew, 4651126258Smlaier (*state)->packets[0], (*state)->packets[1], 4652126258Smlaier direction == PF_IN ? "in" : "out", 4653126258Smlaier direction == (*state)->direction ? "fwd" : "rev"); 4654126258Smlaier printf("pf: State failure on: %c %c %c %c | %c %c\n", 4655126258Smlaier SEQ_GEQ(src->seqhi, end) ? ' ' : '1', 4656126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) ? 4657126258Smlaier ' ': '2', 4658126258Smlaier (ackskew >= -MAXACKWINDOW) ? ' ' : '3', 4659126258Smlaier (ackskew <= (MAXACKWINDOW << sws)) ? ' ' : '4', 4660126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) ?' ' :'5', 4661126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW) ?' ' :'6'); 4662126258Smlaier } 4663145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 4664126258Smlaier return (PF_DROP); 4665126258Smlaier } 4666126258Smlaier 4667126258Smlaier /* Any packets which have gotten here are to be passed */ 4668126258Smlaier 4669126258Smlaier /* translate source/destination address, if necessary */ 4670126258Smlaier if (STATE_TRANSLATE(*state)) { 4671126258Smlaier if (direction == PF_OUT) 4672126258Smlaier pf_change_ap(pd->src, &th->th_sport, pd->ip_sum, 4673126258Smlaier &th->th_sum, &(*state)->gwy.addr, 4674126258Smlaier (*state)->gwy.port, 0, pd->af); 4675126258Smlaier else 4676126258Smlaier pf_change_ap(pd->dst, &th->th_dport, pd->ip_sum, 4677126258Smlaier &th->th_sum, &(*state)->lan.addr, 4678126258Smlaier (*state)->lan.port, 0, pd->af); 4679126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4680126258Smlaier } else if (copyback) { 4681126258Smlaier /* Copyback sequence modulation or stateful scrub changes */ 4682126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4683126258Smlaier } 4684126258Smlaier 4685126258Smlaier return (PF_PASS); 4686126258Smlaier} 4687126258Smlaier 4688126258Smlaierint 4689130613Smlaierpf_test_state_udp(struct pf_state **state, int direction, struct pfi_kif *kif, 4690130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd) 4691126258Smlaier{ 4692126258Smlaier struct pf_state_peer *src, *dst; 4693130613Smlaier struct pf_state key; 4694126258Smlaier struct udphdr *uh = pd->hdr.udp; 4695126258Smlaier 4696126258Smlaier key.af = pd->af; 4697126258Smlaier key.proto = IPPROTO_UDP; 4698130613Smlaier if (direction == PF_IN) { 4699130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4700130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4701130613Smlaier key.ext.port = uh->uh_sport; 4702130613Smlaier key.gwy.port = uh->uh_dport; 4703130613Smlaier } else { 4704130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4705130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4706130613Smlaier key.lan.port = uh->uh_sport; 4707130613Smlaier key.ext.port = uh->uh_dport; 4708130613Smlaier } 4709126258Smlaier 4710126258Smlaier STATE_LOOKUP(); 4711126258Smlaier 4712126258Smlaier if (direction == (*state)->direction) { 4713126258Smlaier src = &(*state)->src; 4714126258Smlaier dst = &(*state)->dst; 4715126258Smlaier } else { 4716126258Smlaier src = &(*state)->dst; 4717126258Smlaier dst = &(*state)->src; 4718126258Smlaier } 4719126258Smlaier 4720126258Smlaier /* update states */ 4721126258Smlaier if (src->state < PFUDPS_SINGLE) 4722126258Smlaier src->state = PFUDPS_SINGLE; 4723126258Smlaier if (dst->state == PFUDPS_SINGLE) 4724126258Smlaier dst->state = PFUDPS_MULTIPLE; 4725126258Smlaier 4726126258Smlaier /* update expire time */ 4727126261Smlaier (*state)->expire = time_second; 4728126258Smlaier if (src->state == PFUDPS_MULTIPLE && dst->state == PFUDPS_MULTIPLE) 4729126258Smlaier (*state)->timeout = PFTM_UDP_MULTIPLE; 4730126258Smlaier else 4731126258Smlaier (*state)->timeout = PFTM_UDP_SINGLE; 4732126258Smlaier 4733126258Smlaier /* translate source/destination address, if necessary */ 4734126258Smlaier if (STATE_TRANSLATE(*state)) { 4735126258Smlaier if (direction == PF_OUT) 4736126258Smlaier pf_change_ap(pd->src, &uh->uh_sport, pd->ip_sum, 4737126258Smlaier &uh->uh_sum, &(*state)->gwy.addr, 4738126258Smlaier (*state)->gwy.port, 1, pd->af); 4739126258Smlaier else 4740126258Smlaier pf_change_ap(pd->dst, &uh->uh_dport, pd->ip_sum, 4741126258Smlaier &uh->uh_sum, &(*state)->lan.addr, 4742126258Smlaier (*state)->lan.port, 1, pd->af); 4743126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 4744126258Smlaier } 4745126258Smlaier 4746126258Smlaier return (PF_PASS); 4747126258Smlaier} 4748126258Smlaier 4749126258Smlaierint 4750130613Smlaierpf_test_state_icmp(struct pf_state **state, int direction, struct pfi_kif *kif, 4751145836Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, u_short *reason) 4752126258Smlaier{ 4753126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4754127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 4755127629Smlaier u_int16_t *icmpsum = NULL; /* make the compiler happy */ 4756127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 4757130613Smlaier int state_icmp = 0; 4758126258Smlaier 4759126258Smlaier switch (pd->proto) { 4760126258Smlaier#ifdef INET 4761126258Smlaier case IPPROTO_ICMP: 4762126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 4763126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 4764126258Smlaier icmpsum = &pd->hdr.icmp->icmp_cksum; 4765126258Smlaier 4766126258Smlaier if (icmptype == ICMP_UNREACH || 4767126258Smlaier icmptype == ICMP_SOURCEQUENCH || 4768126258Smlaier icmptype == ICMP_REDIRECT || 4769126258Smlaier icmptype == ICMP_TIMXCEED || 4770126258Smlaier icmptype == ICMP_PARAMPROB) 4771126258Smlaier state_icmp++; 4772126258Smlaier break; 4773126258Smlaier#endif /* INET */ 4774126258Smlaier#ifdef INET6 4775126258Smlaier case IPPROTO_ICMPV6: 4776126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 4777126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 4778126258Smlaier icmpsum = &pd->hdr.icmp6->icmp6_cksum; 4779126258Smlaier 4780126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 4781126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 4782126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 4783126258Smlaier icmptype == ICMP6_PARAM_PROB) 4784126258Smlaier state_icmp++; 4785126258Smlaier break; 4786126258Smlaier#endif /* INET6 */ 4787126258Smlaier } 4788126258Smlaier 4789126258Smlaier if (!state_icmp) { 4790126258Smlaier 4791126258Smlaier /* 4792126258Smlaier * ICMP query/reply message not related to a TCP/UDP packet. 4793126258Smlaier * Search for an ICMP state. 4794126258Smlaier */ 4795130613Smlaier struct pf_state key; 4796126258Smlaier 4797126258Smlaier key.af = pd->af; 4798126258Smlaier key.proto = pd->proto; 4799130613Smlaier if (direction == PF_IN) { 4800130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4801130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4802130613Smlaier key.ext.port = icmpid; 4803130613Smlaier key.gwy.port = icmpid; 4804130613Smlaier } else { 4805130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4806130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4807130613Smlaier key.lan.port = icmpid; 4808130613Smlaier key.ext.port = icmpid; 4809130613Smlaier } 4810126258Smlaier 4811126258Smlaier STATE_LOOKUP(); 4812126258Smlaier 4813126261Smlaier (*state)->expire = time_second; 4814126258Smlaier (*state)->timeout = PFTM_ICMP_ERROR_REPLY; 4815126258Smlaier 4816126258Smlaier /* translate source/destination address, if necessary */ 4817126258Smlaier if (PF_ANEQ(&(*state)->lan.addr, &(*state)->gwy.addr, pd->af)) { 4818126258Smlaier if (direction == PF_OUT) { 4819126258Smlaier switch (pd->af) { 4820126258Smlaier#ifdef INET 4821126258Smlaier case AF_INET: 4822126258Smlaier pf_change_a(&saddr->v4.s_addr, 4823126258Smlaier pd->ip_sum, 4824126258Smlaier (*state)->gwy.addr.v4.s_addr, 0); 4825126258Smlaier break; 4826126258Smlaier#endif /* INET */ 4827126258Smlaier#ifdef INET6 4828126258Smlaier case AF_INET6: 4829126258Smlaier pf_change_a6(saddr, 4830126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4831126258Smlaier &(*state)->gwy.addr, 0); 4832126258Smlaier m_copyback(m, off, 4833126258Smlaier sizeof(struct icmp6_hdr), 4834126261Smlaier (caddr_t)pd->hdr.icmp6); 4835126258Smlaier break; 4836126258Smlaier#endif /* INET6 */ 4837126258Smlaier } 4838126258Smlaier } else { 4839126258Smlaier switch (pd->af) { 4840126258Smlaier#ifdef INET 4841126258Smlaier case AF_INET: 4842126258Smlaier pf_change_a(&daddr->v4.s_addr, 4843126258Smlaier pd->ip_sum, 4844126258Smlaier (*state)->lan.addr.v4.s_addr, 0); 4845126258Smlaier break; 4846126258Smlaier#endif /* INET */ 4847126258Smlaier#ifdef INET6 4848126258Smlaier case AF_INET6: 4849126258Smlaier pf_change_a6(daddr, 4850126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4851126258Smlaier &(*state)->lan.addr, 0); 4852126258Smlaier m_copyback(m, off, 4853126258Smlaier sizeof(struct icmp6_hdr), 4854126261Smlaier (caddr_t)pd->hdr.icmp6); 4855126258Smlaier break; 4856126258Smlaier#endif /* INET6 */ 4857126258Smlaier } 4858126258Smlaier } 4859126258Smlaier } 4860126258Smlaier 4861126258Smlaier return (PF_PASS); 4862126258Smlaier 4863126258Smlaier } else { 4864126258Smlaier /* 4865126258Smlaier * ICMP error message in response to a TCP/UDP packet. 4866126258Smlaier * Extract the inner TCP/UDP header and search for that state. 4867126258Smlaier */ 4868126258Smlaier 4869126258Smlaier struct pf_pdesc pd2; 4870126258Smlaier#ifdef INET 4871126258Smlaier struct ip h2; 4872126258Smlaier#endif /* INET */ 4873126258Smlaier#ifdef INET6 4874126258Smlaier struct ip6_hdr h2_6; 4875126258Smlaier int terminal = 0; 4876126258Smlaier#endif /* INET6 */ 4877127629Smlaier int ipoff2 = 0; /* make the compiler happy */ 4878127629Smlaier int off2 = 0; /* make the compiler happy */ 4879126258Smlaier 4880126258Smlaier pd2.af = pd->af; 4881126258Smlaier switch (pd->af) { 4882126258Smlaier#ifdef INET 4883126258Smlaier case AF_INET: 4884126258Smlaier /* offset of h2 in mbuf chain */ 4885126258Smlaier ipoff2 = off + ICMP_MINLEN; 4886126258Smlaier 4887126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2, sizeof(h2), 4888145836Smlaier NULL, reason, pd2.af)) { 4889126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4890126258Smlaier ("pf: ICMP error message too short " 4891126258Smlaier "(ip)\n")); 4892126258Smlaier return (PF_DROP); 4893126258Smlaier } 4894126258Smlaier /* 4895126258Smlaier * ICMP error messages don't refer to non-first 4896126258Smlaier * fragments 4897126258Smlaier */ 4898145836Smlaier if (h2.ip_off & htons(IP_OFFMASK)) { 4899145836Smlaier REASON_SET(reason, PFRES_FRAG); 4900126258Smlaier return (PF_DROP); 4901145836Smlaier } 4902126258Smlaier 4903126258Smlaier /* offset of protocol header that follows h2 */ 4904126258Smlaier off2 = ipoff2 + (h2.ip_hl << 2); 4905126258Smlaier 4906126258Smlaier pd2.proto = h2.ip_p; 4907126258Smlaier pd2.src = (struct pf_addr *)&h2.ip_src; 4908126258Smlaier pd2.dst = (struct pf_addr *)&h2.ip_dst; 4909126258Smlaier pd2.ip_sum = &h2.ip_sum; 4910126258Smlaier break; 4911126258Smlaier#endif /* INET */ 4912126258Smlaier#ifdef INET6 4913126258Smlaier case AF_INET6: 4914126258Smlaier ipoff2 = off + sizeof(struct icmp6_hdr); 4915126258Smlaier 4916126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2_6, sizeof(h2_6), 4917145836Smlaier NULL, reason, pd2.af)) { 4918126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4919126258Smlaier ("pf: ICMP error message too short " 4920126258Smlaier "(ip6)\n")); 4921126258Smlaier return (PF_DROP); 4922126258Smlaier } 4923126258Smlaier pd2.proto = h2_6.ip6_nxt; 4924126258Smlaier pd2.src = (struct pf_addr *)&h2_6.ip6_src; 4925126258Smlaier pd2.dst = (struct pf_addr *)&h2_6.ip6_dst; 4926126258Smlaier pd2.ip_sum = NULL; 4927126258Smlaier off2 = ipoff2 + sizeof(h2_6); 4928126258Smlaier do { 4929126258Smlaier switch (pd2.proto) { 4930126258Smlaier case IPPROTO_FRAGMENT: 4931126258Smlaier /* 4932126258Smlaier * ICMPv6 error messages for 4933126258Smlaier * non-first fragments 4934126258Smlaier */ 4935145836Smlaier REASON_SET(reason, PFRES_FRAG); 4936126258Smlaier return (PF_DROP); 4937126258Smlaier case IPPROTO_AH: 4938126258Smlaier case IPPROTO_HOPOPTS: 4939126258Smlaier case IPPROTO_ROUTING: 4940126258Smlaier case IPPROTO_DSTOPTS: { 4941126258Smlaier /* get next header and header length */ 4942126258Smlaier struct ip6_ext opt6; 4943126258Smlaier 4944126258Smlaier if (!pf_pull_hdr(m, off2, &opt6, 4945145836Smlaier sizeof(opt6), NULL, reason, 4946145836Smlaier pd2.af)) { 4947126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4948126258Smlaier ("pf: ICMPv6 short opt\n")); 4949126258Smlaier return (PF_DROP); 4950126258Smlaier } 4951126258Smlaier if (pd2.proto == IPPROTO_AH) 4952126258Smlaier off2 += (opt6.ip6e_len + 2) * 4; 4953126258Smlaier else 4954126258Smlaier off2 += (opt6.ip6e_len + 1) * 8; 4955126258Smlaier pd2.proto = opt6.ip6e_nxt; 4956126258Smlaier /* goto the next header */ 4957126258Smlaier break; 4958126258Smlaier } 4959126258Smlaier default: 4960126258Smlaier terminal++; 4961126258Smlaier break; 4962126258Smlaier } 4963126258Smlaier } while (!terminal); 4964126258Smlaier break; 4965126258Smlaier#endif /* INET6 */ 4966126258Smlaier } 4967126258Smlaier 4968126258Smlaier switch (pd2.proto) { 4969126258Smlaier case IPPROTO_TCP: { 4970126258Smlaier struct tcphdr th; 4971126258Smlaier u_int32_t seq; 4972130613Smlaier struct pf_state key; 4973126258Smlaier struct pf_state_peer *src, *dst; 4974126258Smlaier u_int8_t dws; 4975128129Smlaier int copyback = 0; 4976126258Smlaier 4977126258Smlaier /* 4978126258Smlaier * Only the first 8 bytes of the TCP header can be 4979126258Smlaier * expected. Don't access any TCP header fields after 4980126258Smlaier * th_seq, an ackskew test is not possible. 4981126258Smlaier */ 4982145836Smlaier if (!pf_pull_hdr(m, off2, &th, 8, NULL, reason, 4983145836Smlaier pd2.af)) { 4984126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4985126258Smlaier ("pf: ICMP error message too short " 4986126258Smlaier "(tcp)\n")); 4987126258Smlaier return (PF_DROP); 4988126258Smlaier } 4989126258Smlaier 4990126258Smlaier key.af = pd2.af; 4991126258Smlaier key.proto = IPPROTO_TCP; 4992130613Smlaier if (direction == PF_IN) { 4993130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4994130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4995130613Smlaier key.ext.port = th.th_dport; 4996130613Smlaier key.gwy.port = th.th_sport; 4997130613Smlaier } else { 4998130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4999130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5000130613Smlaier key.lan.port = th.th_dport; 5001130613Smlaier key.ext.port = th.th_sport; 5002130613Smlaier } 5003126258Smlaier 5004126258Smlaier STATE_LOOKUP(); 5005126258Smlaier 5006126258Smlaier if (direction == (*state)->direction) { 5007126258Smlaier src = &(*state)->dst; 5008126258Smlaier dst = &(*state)->src; 5009126258Smlaier } else { 5010126258Smlaier src = &(*state)->src; 5011126258Smlaier dst = &(*state)->dst; 5012126258Smlaier } 5013126258Smlaier 5014130613Smlaier if (src->wscale && dst->wscale && 5015130613Smlaier !(th.th_flags & TH_SYN)) 5016126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 5017126258Smlaier else 5018126258Smlaier dws = 0; 5019126258Smlaier 5020126258Smlaier /* Demodulate sequence number */ 5021126258Smlaier seq = ntohl(th.th_seq) - src->seqdiff; 5022128129Smlaier if (src->seqdiff) { 5023128129Smlaier pf_change_a(&th.th_seq, icmpsum, 5024126258Smlaier htonl(seq), 0); 5025128129Smlaier copyback = 1; 5026128129Smlaier } 5027126258Smlaier 5028126258Smlaier if (!SEQ_GEQ(src->seqhi, seq) || 5029126258Smlaier !SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws))) { 5030126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 5031126258Smlaier printf("pf: BAD ICMP %d:%d ", 5032126258Smlaier icmptype, pd->hdr.icmp->icmp_code); 5033126258Smlaier pf_print_host(pd->src, 0, pd->af); 5034126258Smlaier printf(" -> "); 5035126258Smlaier pf_print_host(pd->dst, 0, pd->af); 5036126258Smlaier printf(" state: "); 5037126258Smlaier pf_print_state(*state); 5038126258Smlaier printf(" seq=%u\n", seq); 5039126258Smlaier } 5040145836Smlaier REASON_SET(reason, PFRES_BADSTATE); 5041126258Smlaier return (PF_DROP); 5042126258Smlaier } 5043126258Smlaier 5044126258Smlaier if (STATE_TRANSLATE(*state)) { 5045126258Smlaier if (direction == PF_IN) { 5046126258Smlaier pf_change_icmp(pd2.src, &th.th_sport, 5047128129Smlaier daddr, &(*state)->lan.addr, 5048126258Smlaier (*state)->lan.port, NULL, 5049126258Smlaier pd2.ip_sum, icmpsum, 5050126258Smlaier pd->ip_sum, 0, pd2.af); 5051126258Smlaier } else { 5052126258Smlaier pf_change_icmp(pd2.dst, &th.th_dport, 5053126258Smlaier saddr, &(*state)->gwy.addr, 5054126258Smlaier (*state)->gwy.port, NULL, 5055126258Smlaier pd2.ip_sum, icmpsum, 5056126258Smlaier pd->ip_sum, 0, pd2.af); 5057126258Smlaier } 5058128129Smlaier copyback = 1; 5059128129Smlaier } 5060128129Smlaier 5061128129Smlaier if (copyback) { 5062126258Smlaier switch (pd2.af) { 5063126258Smlaier#ifdef INET 5064126258Smlaier case AF_INET: 5065126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5066126261Smlaier (caddr_t)pd->hdr.icmp); 5067126258Smlaier m_copyback(m, ipoff2, sizeof(h2), 5068126261Smlaier (caddr_t)&h2); 5069126258Smlaier break; 5070126258Smlaier#endif /* INET */ 5071126258Smlaier#ifdef INET6 5072126258Smlaier case AF_INET6: 5073126258Smlaier m_copyback(m, off, 5074126258Smlaier sizeof(struct icmp6_hdr), 5075126261Smlaier (caddr_t)pd->hdr.icmp6); 5076126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5077126261Smlaier (caddr_t)&h2_6); 5078126258Smlaier break; 5079126258Smlaier#endif /* INET6 */ 5080126258Smlaier } 5081126261Smlaier m_copyback(m, off2, 8, (caddr_t)&th); 5082126258Smlaier } 5083126258Smlaier 5084126258Smlaier return (PF_PASS); 5085126258Smlaier break; 5086126258Smlaier } 5087126258Smlaier case IPPROTO_UDP: { 5088126258Smlaier struct udphdr uh; 5089130613Smlaier struct pf_state key; 5090126258Smlaier 5091126258Smlaier if (!pf_pull_hdr(m, off2, &uh, sizeof(uh), 5092145836Smlaier NULL, reason, pd2.af)) { 5093126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5094126258Smlaier ("pf: ICMP error message too short " 5095126258Smlaier "(udp)\n")); 5096126258Smlaier return (PF_DROP); 5097126258Smlaier } 5098126258Smlaier 5099126258Smlaier key.af = pd2.af; 5100126258Smlaier key.proto = IPPROTO_UDP; 5101130613Smlaier if (direction == PF_IN) { 5102130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5103130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5104130613Smlaier key.ext.port = uh.uh_dport; 5105130613Smlaier key.gwy.port = uh.uh_sport; 5106130613Smlaier } else { 5107130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5108130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5109130613Smlaier key.lan.port = uh.uh_dport; 5110130613Smlaier key.ext.port = uh.uh_sport; 5111130613Smlaier } 5112126258Smlaier 5113126258Smlaier STATE_LOOKUP(); 5114126258Smlaier 5115126258Smlaier if (STATE_TRANSLATE(*state)) { 5116126258Smlaier if (direction == PF_IN) { 5117126258Smlaier pf_change_icmp(pd2.src, &uh.uh_sport, 5118126258Smlaier daddr, &(*state)->lan.addr, 5119126258Smlaier (*state)->lan.port, &uh.uh_sum, 5120126258Smlaier pd2.ip_sum, icmpsum, 5121126258Smlaier pd->ip_sum, 1, pd2.af); 5122126258Smlaier } else { 5123126258Smlaier pf_change_icmp(pd2.dst, &uh.uh_dport, 5124126258Smlaier saddr, &(*state)->gwy.addr, 5125126258Smlaier (*state)->gwy.port, &uh.uh_sum, 5126126258Smlaier pd2.ip_sum, icmpsum, 5127126258Smlaier pd->ip_sum, 1, pd2.af); 5128126258Smlaier } 5129126258Smlaier switch (pd2.af) { 5130126258Smlaier#ifdef INET 5131126258Smlaier case AF_INET: 5132126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5133126261Smlaier (caddr_t)pd->hdr.icmp); 5134126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5135126261Smlaier (caddr_t)&h2); 5136126258Smlaier break; 5137126258Smlaier#endif /* INET */ 5138126258Smlaier#ifdef INET6 5139126258Smlaier case AF_INET6: 5140126258Smlaier m_copyback(m, off, 5141126258Smlaier sizeof(struct icmp6_hdr), 5142126261Smlaier (caddr_t)pd->hdr.icmp6); 5143126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5144126261Smlaier (caddr_t)&h2_6); 5145126258Smlaier break; 5146126258Smlaier#endif /* INET6 */ 5147126258Smlaier } 5148126261Smlaier m_copyback(m, off2, sizeof(uh), 5149126261Smlaier (caddr_t)&uh); 5150126258Smlaier } 5151126258Smlaier 5152126258Smlaier return (PF_PASS); 5153126258Smlaier break; 5154126258Smlaier } 5155126258Smlaier#ifdef INET 5156126258Smlaier case IPPROTO_ICMP: { 5157126258Smlaier struct icmp iih; 5158130613Smlaier struct pf_state key; 5159126258Smlaier 5160126258Smlaier if (!pf_pull_hdr(m, off2, &iih, ICMP_MINLEN, 5161145836Smlaier NULL, reason, pd2.af)) { 5162126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5163126258Smlaier ("pf: ICMP error message too short i" 5164126258Smlaier "(icmp)\n")); 5165126258Smlaier return (PF_DROP); 5166126258Smlaier } 5167126258Smlaier 5168126258Smlaier key.af = pd2.af; 5169126258Smlaier key.proto = IPPROTO_ICMP; 5170130613Smlaier if (direction == PF_IN) { 5171130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5172130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5173130613Smlaier key.ext.port = iih.icmp_id; 5174130613Smlaier key.gwy.port = iih.icmp_id; 5175130613Smlaier } else { 5176130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5177130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5178130613Smlaier key.lan.port = iih.icmp_id; 5179130613Smlaier key.ext.port = iih.icmp_id; 5180130613Smlaier } 5181126258Smlaier 5182126258Smlaier STATE_LOOKUP(); 5183126258Smlaier 5184126258Smlaier if (STATE_TRANSLATE(*state)) { 5185126258Smlaier if (direction == PF_IN) { 5186126258Smlaier pf_change_icmp(pd2.src, &iih.icmp_id, 5187126258Smlaier daddr, &(*state)->lan.addr, 5188126258Smlaier (*state)->lan.port, NULL, 5189126258Smlaier pd2.ip_sum, icmpsum, 5190126258Smlaier pd->ip_sum, 0, AF_INET); 5191126258Smlaier } else { 5192126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp_id, 5193126258Smlaier saddr, &(*state)->gwy.addr, 5194126258Smlaier (*state)->gwy.port, NULL, 5195126258Smlaier pd2.ip_sum, icmpsum, 5196126258Smlaier pd->ip_sum, 0, AF_INET); 5197126258Smlaier } 5198126261Smlaier m_copyback(m, off, ICMP_MINLEN, 5199126261Smlaier (caddr_t)pd->hdr.icmp); 5200126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5201126261Smlaier (caddr_t)&h2); 5202126261Smlaier m_copyback(m, off2, ICMP_MINLEN, 5203126261Smlaier (caddr_t)&iih); 5204126258Smlaier } 5205126258Smlaier 5206126258Smlaier return (PF_PASS); 5207126258Smlaier break; 5208126258Smlaier } 5209126258Smlaier#endif /* INET */ 5210126258Smlaier#ifdef INET6 5211126258Smlaier case IPPROTO_ICMPV6: { 5212126258Smlaier struct icmp6_hdr iih; 5213130613Smlaier struct pf_state key; 5214126258Smlaier 5215126258Smlaier if (!pf_pull_hdr(m, off2, &iih, 5216145836Smlaier sizeof(struct icmp6_hdr), NULL, reason, pd2.af)) { 5217126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5218126258Smlaier ("pf: ICMP error message too short " 5219126258Smlaier "(icmp6)\n")); 5220126258Smlaier return (PF_DROP); 5221126258Smlaier } 5222126258Smlaier 5223126258Smlaier key.af = pd2.af; 5224126258Smlaier key.proto = IPPROTO_ICMPV6; 5225130613Smlaier if (direction == PF_IN) { 5226130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5227130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5228130613Smlaier key.ext.port = iih.icmp6_id; 5229130613Smlaier key.gwy.port = iih.icmp6_id; 5230130613Smlaier } else { 5231130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5232130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5233130613Smlaier key.lan.port = iih.icmp6_id; 5234130613Smlaier key.ext.port = iih.icmp6_id; 5235130613Smlaier } 5236126258Smlaier 5237126258Smlaier STATE_LOOKUP(); 5238126258Smlaier 5239126258Smlaier if (STATE_TRANSLATE(*state)) { 5240126258Smlaier if (direction == PF_IN) { 5241126258Smlaier pf_change_icmp(pd2.src, &iih.icmp6_id, 5242126258Smlaier daddr, &(*state)->lan.addr, 5243126258Smlaier (*state)->lan.port, NULL, 5244126258Smlaier pd2.ip_sum, icmpsum, 5245126258Smlaier pd->ip_sum, 0, AF_INET6); 5246126258Smlaier } else { 5247126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp6_id, 5248126258Smlaier saddr, &(*state)->gwy.addr, 5249126258Smlaier (*state)->gwy.port, NULL, 5250126258Smlaier pd2.ip_sum, icmpsum, 5251126258Smlaier pd->ip_sum, 0, AF_INET6); 5252126258Smlaier } 5253126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 5254126261Smlaier (caddr_t)pd->hdr.icmp6); 5255126261Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5256126261Smlaier (caddr_t)&h2_6); 5257126258Smlaier m_copyback(m, off2, sizeof(struct icmp6_hdr), 5258126261Smlaier (caddr_t)&iih); 5259126258Smlaier } 5260126258Smlaier 5261126258Smlaier return (PF_PASS); 5262126258Smlaier break; 5263126258Smlaier } 5264126258Smlaier#endif /* INET6 */ 5265126258Smlaier default: { 5266130613Smlaier struct pf_state key; 5267126258Smlaier 5268126258Smlaier key.af = pd2.af; 5269126258Smlaier key.proto = pd2.proto; 5270130613Smlaier if (direction == PF_IN) { 5271130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 5272130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 5273130613Smlaier key.ext.port = 0; 5274130613Smlaier key.gwy.port = 0; 5275130613Smlaier } else { 5276130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 5277130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 5278130613Smlaier key.lan.port = 0; 5279130613Smlaier key.ext.port = 0; 5280130613Smlaier } 5281126258Smlaier 5282126258Smlaier STATE_LOOKUP(); 5283126258Smlaier 5284126258Smlaier if (STATE_TRANSLATE(*state)) { 5285126258Smlaier if (direction == PF_IN) { 5286126258Smlaier pf_change_icmp(pd2.src, NULL, 5287126258Smlaier daddr, &(*state)->lan.addr, 5288126258Smlaier 0, NULL, 5289126258Smlaier pd2.ip_sum, icmpsum, 5290126258Smlaier pd->ip_sum, 0, pd2.af); 5291126258Smlaier } else { 5292126258Smlaier pf_change_icmp(pd2.dst, NULL, 5293126258Smlaier saddr, &(*state)->gwy.addr, 5294126258Smlaier 0, NULL, 5295126258Smlaier pd2.ip_sum, icmpsum, 5296126258Smlaier pd->ip_sum, 0, pd2.af); 5297126258Smlaier } 5298126258Smlaier switch (pd2.af) { 5299126258Smlaier#ifdef INET 5300126258Smlaier case AF_INET: 5301126258Smlaier m_copyback(m, off, ICMP_MINLEN, 5302126261Smlaier (caddr_t)pd->hdr.icmp); 5303126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 5304126261Smlaier (caddr_t)&h2); 5305126258Smlaier break; 5306126258Smlaier#endif /* INET */ 5307126258Smlaier#ifdef INET6 5308126258Smlaier case AF_INET6: 5309126258Smlaier m_copyback(m, off, 5310126258Smlaier sizeof(struct icmp6_hdr), 5311126261Smlaier (caddr_t)pd->hdr.icmp6); 5312126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 5313126261Smlaier (caddr_t)&h2_6); 5314126258Smlaier break; 5315126258Smlaier#endif /* INET6 */ 5316126258Smlaier } 5317126258Smlaier } 5318126258Smlaier 5319126258Smlaier return (PF_PASS); 5320126258Smlaier break; 5321126258Smlaier } 5322126258Smlaier } 5323126258Smlaier } 5324126258Smlaier} 5325126258Smlaier 5326126258Smlaierint 5327130613Smlaierpf_test_state_other(struct pf_state **state, int direction, struct pfi_kif *kif, 5328126258Smlaier struct pf_pdesc *pd) 5329126258Smlaier{ 5330126258Smlaier struct pf_state_peer *src, *dst; 5331130613Smlaier struct pf_state key; 5332126258Smlaier 5333126258Smlaier key.af = pd->af; 5334126258Smlaier key.proto = pd->proto; 5335130613Smlaier if (direction == PF_IN) { 5336130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 5337130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 5338130613Smlaier key.ext.port = 0; 5339130613Smlaier key.gwy.port = 0; 5340130613Smlaier } else { 5341130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 5342130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 5343130613Smlaier key.lan.port = 0; 5344130613Smlaier key.ext.port = 0; 5345130613Smlaier } 5346126258Smlaier 5347126258Smlaier STATE_LOOKUP(); 5348126258Smlaier 5349126258Smlaier if (direction == (*state)->direction) { 5350126258Smlaier src = &(*state)->src; 5351126258Smlaier dst = &(*state)->dst; 5352126258Smlaier } else { 5353126258Smlaier src = &(*state)->dst; 5354126258Smlaier dst = &(*state)->src; 5355126258Smlaier } 5356126258Smlaier 5357126258Smlaier /* update states */ 5358126258Smlaier if (src->state < PFOTHERS_SINGLE) 5359126258Smlaier src->state = PFOTHERS_SINGLE; 5360126258Smlaier if (dst->state == PFOTHERS_SINGLE) 5361126258Smlaier dst->state = PFOTHERS_MULTIPLE; 5362126258Smlaier 5363126258Smlaier /* update expire time */ 5364126261Smlaier (*state)->expire = time_second; 5365126258Smlaier if (src->state == PFOTHERS_MULTIPLE && dst->state == PFOTHERS_MULTIPLE) 5366126258Smlaier (*state)->timeout = PFTM_OTHER_MULTIPLE; 5367126258Smlaier else 5368126258Smlaier (*state)->timeout = PFTM_OTHER_SINGLE; 5369126258Smlaier 5370126258Smlaier /* translate source/destination address, if necessary */ 5371126258Smlaier if (STATE_TRANSLATE(*state)) { 5372126258Smlaier if (direction == PF_OUT) 5373126258Smlaier switch (pd->af) { 5374126258Smlaier#ifdef INET 5375126258Smlaier case AF_INET: 5376126258Smlaier pf_change_a(&pd->src->v4.s_addr, 5377126258Smlaier pd->ip_sum, (*state)->gwy.addr.v4.s_addr, 5378126258Smlaier 0); 5379126258Smlaier break; 5380126258Smlaier#endif /* INET */ 5381126258Smlaier#ifdef INET6 5382126258Smlaier case AF_INET6: 5383126258Smlaier PF_ACPY(pd->src, &(*state)->gwy.addr, pd->af); 5384126258Smlaier break; 5385126258Smlaier#endif /* INET6 */ 5386126258Smlaier } 5387126258Smlaier else 5388126258Smlaier switch (pd->af) { 5389126258Smlaier#ifdef INET 5390126258Smlaier case AF_INET: 5391126258Smlaier pf_change_a(&pd->dst->v4.s_addr, 5392126258Smlaier pd->ip_sum, (*state)->lan.addr.v4.s_addr, 5393126258Smlaier 0); 5394126258Smlaier break; 5395126258Smlaier#endif /* INET */ 5396126258Smlaier#ifdef INET6 5397126258Smlaier case AF_INET6: 5398126258Smlaier PF_ACPY(pd->dst, &(*state)->lan.addr, pd->af); 5399126258Smlaier break; 5400126258Smlaier#endif /* INET6 */ 5401126258Smlaier } 5402126258Smlaier } 5403126258Smlaier 5404126258Smlaier return (PF_PASS); 5405126258Smlaier} 5406126258Smlaier 5407126258Smlaier/* 5408126258Smlaier * ipoff and off are measured from the start of the mbuf chain. 5409126258Smlaier * h must be at "ipoff" on the mbuf chain. 5410126258Smlaier */ 5411126258Smlaiervoid * 5412126258Smlaierpf_pull_hdr(struct mbuf *m, int off, void *p, int len, 5413126258Smlaier u_short *actionp, u_short *reasonp, sa_family_t af) 5414126258Smlaier{ 5415126258Smlaier switch (af) { 5416126258Smlaier#ifdef INET 5417126258Smlaier case AF_INET: { 5418126258Smlaier struct ip *h = mtod(m, struct ip *); 5419126258Smlaier u_int16_t fragoff = (ntohs(h->ip_off) & IP_OFFMASK) << 3; 5420126258Smlaier 5421126258Smlaier if (fragoff) { 5422126258Smlaier if (fragoff >= len) 5423126258Smlaier ACTION_SET(actionp, PF_PASS); 5424126258Smlaier else { 5425126258Smlaier ACTION_SET(actionp, PF_DROP); 5426126258Smlaier REASON_SET(reasonp, PFRES_FRAG); 5427126258Smlaier } 5428126258Smlaier return (NULL); 5429126258Smlaier } 5430130613Smlaier if (m->m_pkthdr.len < off + len || 5431130613Smlaier ntohs(h->ip_len) < off + len) { 5432126258Smlaier ACTION_SET(actionp, PF_DROP); 5433126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5434126258Smlaier return (NULL); 5435126258Smlaier } 5436126258Smlaier break; 5437126258Smlaier } 5438126258Smlaier#endif /* INET */ 5439126258Smlaier#ifdef INET6 5440126258Smlaier case AF_INET6: { 5441126258Smlaier struct ip6_hdr *h = mtod(m, struct ip6_hdr *); 5442126258Smlaier 5443126258Smlaier if (m->m_pkthdr.len < off + len || 5444126258Smlaier (ntohs(h->ip6_plen) + sizeof(struct ip6_hdr)) < 5445126258Smlaier (unsigned)(off + len)) { 5446126258Smlaier ACTION_SET(actionp, PF_DROP); 5447126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5448126258Smlaier return (NULL); 5449126258Smlaier } 5450126258Smlaier break; 5451126258Smlaier } 5452126258Smlaier#endif /* INET6 */ 5453126258Smlaier } 5454126258Smlaier m_copydata(m, off, len, p); 5455126258Smlaier return (p); 5456126258Smlaier} 5457126258Smlaier 5458126258Smlaierint 5459126258Smlaierpf_routable(struct pf_addr *addr, sa_family_t af) 5460126258Smlaier{ 5461126258Smlaier struct sockaddr_in *dst; 5462145836Smlaier#ifdef INET6 5463145836Smlaier struct sockaddr_in6 *dst6; 5464145836Smlaier struct route_in6 ro; 5465145836Smlaier#else 5466126258Smlaier struct route ro; 5467145836Smlaier#endif 5468126258Smlaier 5469126258Smlaier bzero(&ro, sizeof(ro)); 5470145836Smlaier switch (af) { 5471145836Smlaier case AF_INET: 5472145836Smlaier dst = satosin(&ro.ro_dst); 5473145836Smlaier dst->sin_family = AF_INET; 5474145836Smlaier dst->sin_len = sizeof(*dst); 5475145836Smlaier dst->sin_addr = addr->v4; 5476145836Smlaier break; 5477145836Smlaier#ifdef INET6 5478145836Smlaier case AF_INET6: 5479145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 5480145836Smlaier dst6->sin6_family = AF_INET6; 5481145836Smlaier dst6->sin6_len = sizeof(*dst6); 5482145836Smlaier dst6->sin6_addr = addr->v6; 5483145836Smlaier break; 5484145836Smlaier#endif /* INET6 */ 5485145836Smlaier default: 5486145836Smlaier return (0); 5487145836Smlaier } 5488145836Smlaier 5489127145Smlaier#ifdef __FreeBSD__ 5490126261Smlaier#ifdef RTF_PRCLONING 5491145836Smlaier rtalloc_ign((struct route *)&ro, (RTF_CLONING | RTF_PRCLONING)); 5492126261Smlaier#else /* !RTF_PRCLONING */ 5493145836Smlaier rtalloc_ign((struct route *)&ro, RTF_CLONING); 5494126261Smlaier#endif 5495126261Smlaier#else /* ! __FreeBSD__ */ 5496145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 5497126261Smlaier#endif 5498126258Smlaier 5499126258Smlaier if (ro.ro_rt != NULL) { 5500126258Smlaier RTFREE(ro.ro_rt); 5501145836Smlaier return (1); 5502126258Smlaier } 5503126258Smlaier 5504145836Smlaier return (0); 5505145836Smlaier} 5506145836Smlaier 5507145836Smlaierint 5508145836Smlaierpf_rtlabel_match(struct pf_addr *addr, sa_family_t af, struct pf_addr_wrap *aw) 5509145836Smlaier{ 5510145836Smlaier struct sockaddr_in *dst; 5511145836Smlaier#ifdef INET6 5512145836Smlaier struct sockaddr_in6 *dst6; 5513145836Smlaier struct route_in6 ro; 5514145836Smlaier#else 5515145836Smlaier struct route ro; 5516145836Smlaier#endif 5517145836Smlaier int ret = 0; 5518145836Smlaier 5519145836Smlaier bzero(&ro, sizeof(ro)); 5520145836Smlaier switch (af) { 5521145836Smlaier case AF_INET: 5522145836Smlaier dst = satosin(&ro.ro_dst); 5523145836Smlaier dst->sin_family = AF_INET; 5524145836Smlaier dst->sin_len = sizeof(*dst); 5525145836Smlaier dst->sin_addr = addr->v4; 5526145836Smlaier break; 5527145836Smlaier#ifdef INET6 5528145836Smlaier case AF_INET6: 5529145836Smlaier dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 5530145836Smlaier dst6->sin6_family = AF_INET6; 5531145836Smlaier dst6->sin6_len = sizeof(*dst6); 5532145836Smlaier dst6->sin6_addr = addr->v6; 5533145836Smlaier break; 5534145836Smlaier#endif /* INET6 */ 5535145836Smlaier default: 5536145836Smlaier return (0); 5537145836Smlaier } 5538145836Smlaier 5539145836Smlaier#ifdef __FreeBSD__ 5540145836Smlaier# ifdef RTF_PRCLONING 5541145836Smlaier rtalloc_ign((struct route *)&ro, (RTF_CLONING|RTF_PRCLONING)); 5542145836Smlaier# else /* !RTF_PRCLONING */ 5543145836Smlaier rtalloc_ign((struct route *)&ro, RTF_CLONING); 5544145836Smlaier# endif 5545145836Smlaier#else /* ! __FreeBSD__ */ 5546145836Smlaier rtalloc_noclone((struct route *)&ro, NO_CLONING); 5547145836Smlaier#endif 5548145836Smlaier 5549145836Smlaier if (ro.ro_rt != NULL) { 5550145836Smlaier#ifdef __FreeBSD__ 5551145836Smlaier /* XXX_IMPORT: later */ 5552145836Smlaier#else 5553145836Smlaier if (ro.ro_rt->rt_labelid == aw->v.rtlabel) 5554145836Smlaier ret = 1; 5555145836Smlaier#endif 5556145836Smlaier RTFREE(ro.ro_rt); 5557145836Smlaier } 5558145836Smlaier 5559126258Smlaier return (ret); 5560126258Smlaier} 5561126258Smlaier 5562126258Smlaier#ifdef INET 5563126261Smlaier 5564126258Smlaiervoid 5565126258Smlaierpf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5566126258Smlaier struct pf_state *s) 5567126258Smlaier{ 5568126258Smlaier struct mbuf *m0, *m1; 5569132303Smlaier struct m_tag *mtag; 5570126258Smlaier struct route iproute; 5571127629Smlaier struct route *ro = NULL; /* XXX: was uninitialized */ 5572126258Smlaier struct sockaddr_in *dst; 5573126258Smlaier struct ip *ip; 5574126258Smlaier struct ifnet *ifp = NULL; 5575126258Smlaier struct pf_addr naddr; 5576130613Smlaier struct pf_src_node *sn = NULL; 5577126258Smlaier int error = 0; 5578127145Smlaier#ifdef __FreeBSD__ 5579126261Smlaier int sw_csum; 5580126261Smlaier#endif 5581126258Smlaier 5582126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5583126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5584126258Smlaier panic("pf_route: invalid parameters"); 5585126258Smlaier 5586132303Smlaier if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) { 5587132303Smlaier if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) == 5588132303Smlaier NULL) { 5589132303Smlaier m0 = *m; 5590132303Smlaier *m = NULL; 5591132303Smlaier goto bad; 5592132303Smlaier } 5593132303Smlaier *(char *)(mtag + 1) = 1; 5594132303Smlaier m_tag_prepend(*m, mtag); 5595132303Smlaier } else { 5596132303Smlaier if (*(char *)(mtag + 1) > 3) { 5597132303Smlaier m0 = *m; 5598132303Smlaier *m = NULL; 5599132303Smlaier goto bad; 5600132303Smlaier } 5601132303Smlaier (*(char *)(mtag + 1))++; 5602132303Smlaier } 5603132303Smlaier 5604126258Smlaier if (r->rt == PF_DUPTO) { 5605127145Smlaier#ifdef __FreeBSD__ 5606132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 5607126261Smlaier#else 5608132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 5609126261Smlaier#endif 5610126258Smlaier return; 5611126258Smlaier } else { 5612126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 5613126258Smlaier return; 5614126258Smlaier m0 = *m; 5615126258Smlaier } 5616126258Smlaier 5617145836Smlaier if (m0->m_len < sizeof(struct ip)) { 5618145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5619145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 5620145836Smlaier goto bad; 5621145836Smlaier } 5622145836Smlaier 5623126258Smlaier ip = mtod(m0, struct ip *); 5624126258Smlaier 5625126258Smlaier ro = &iproute; 5626126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 5627126258Smlaier dst = satosin(&ro->ro_dst); 5628126258Smlaier dst->sin_family = AF_INET; 5629126258Smlaier dst->sin_len = sizeof(*dst); 5630126258Smlaier dst->sin_addr = ip->ip_dst; 5631126258Smlaier 5632126258Smlaier if (r->rt == PF_FASTROUTE) { 5633126258Smlaier rtalloc(ro); 5634126258Smlaier if (ro->ro_rt == 0) { 5635126258Smlaier ipstat.ips_noroute++; 5636126258Smlaier goto bad; 5637126258Smlaier } 5638126258Smlaier 5639126258Smlaier ifp = ro->ro_rt->rt_ifp; 5640126258Smlaier ro->ro_rt->rt_use++; 5641126258Smlaier 5642126258Smlaier if (ro->ro_rt->rt_flags & RTF_GATEWAY) 5643126258Smlaier dst = satosin(ro->ro_rt->rt_gateway); 5644126258Smlaier } else { 5645145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 5646145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5647145836Smlaier ("pf_route: TAILQ_EMPTY(&r->rpool.list)\n")); 5648145836Smlaier goto bad; 5649145836Smlaier } 5650126258Smlaier if (s == NULL) { 5651130613Smlaier pf_map_addr(AF_INET, r, (struct pf_addr *)&ip->ip_src, 5652130613Smlaier &naddr, NULL, &sn); 5653126258Smlaier if (!PF_AZERO(&naddr, AF_INET)) 5654126258Smlaier dst->sin_addr.s_addr = naddr.v4.s_addr; 5655130613Smlaier ifp = r->rpool.cur->kif ? 5656130613Smlaier r->rpool.cur->kif->pfik_ifp : NULL; 5657126258Smlaier } else { 5658126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET)) 5659126258Smlaier dst->sin_addr.s_addr = 5660126258Smlaier s->rt_addr.v4.s_addr; 5661130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 5662126258Smlaier } 5663126258Smlaier } 5664126258Smlaier if (ifp == NULL) 5665126258Smlaier goto bad; 5666126258Smlaier 5667130639Smlaier if (oifp != ifp) { 5668127145Smlaier#ifdef __FreeBSD__ 5669126261Smlaier PF_UNLOCK(); 5670145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 5671126261Smlaier PF_LOCK(); 5672126261Smlaier goto bad; 5673126261Smlaier } else if (m0 == NULL) { 5674126261Smlaier PF_LOCK(); 5675126261Smlaier goto done; 5676126261Smlaier } 5677126261Smlaier PF_LOCK(); 5678126261Smlaier#else 5679145836Smlaier if (pf_test(PF_OUT, ifp, &m0, NULL) != PF_PASS) 5680126258Smlaier goto bad; 5681126258Smlaier else if (m0 == NULL) 5682126258Smlaier goto done; 5683126261Smlaier#endif 5684145836Smlaier if (m0->m_len < sizeof(struct ip)) { 5685145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5686145836Smlaier ("pf_route: m0->m_len < sizeof(struct ip)\n")); 5687145836Smlaier goto bad; 5688145836Smlaier } 5689126258Smlaier ip = mtod(m0, struct ip *); 5690126258Smlaier } 5691126258Smlaier 5692127145Smlaier#ifdef __FreeBSD__ 5693126261Smlaier /* Copied from FreeBSD 5.1-CURRENT ip_output. */ 5694126261Smlaier m0->m_pkthdr.csum_flags |= CSUM_IP; 5695126261Smlaier sw_csum = m0->m_pkthdr.csum_flags & ~ifp->if_hwassist; 5696126261Smlaier if (sw_csum & CSUM_DELAY_DATA) { 5697126261Smlaier /* 5698126261Smlaier * XXX: in_delayed_cksum assumes HBO for ip->ip_len (at least) 5699126261Smlaier */ 5700126261Smlaier NTOHS(ip->ip_len); 5701126261Smlaier NTOHS(ip->ip_off); /* XXX: needed? */ 5702126261Smlaier in_delayed_cksum(m0); 5703126261Smlaier HTONS(ip->ip_len); 5704126261Smlaier HTONS(ip->ip_off); 5705126261Smlaier sw_csum &= ~CSUM_DELAY_DATA; 5706126261Smlaier } 5707126261Smlaier m0->m_pkthdr.csum_flags &= ifp->if_hwassist; 5708126261Smlaier 5709126261Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu || 5710126261Smlaier (ifp->if_hwassist & CSUM_FRAGMENT && 5711126261Smlaier ((ip->ip_off & htons(IP_DF)) == 0))) { 5712126261Smlaier /* 5713126261Smlaier * ip->ip_len = htons(ip->ip_len); 5714126261Smlaier * ip->ip_off = htons(ip->ip_off); 5715126261Smlaier */ 5716126261Smlaier ip->ip_sum = 0; 5717126261Smlaier if (sw_csum & CSUM_DELAY_IP) { 5718126261Smlaier /* From KAME */ 5719126261Smlaier if (ip->ip_v == IPVERSION && 5720126261Smlaier (ip->ip_hl << 2) == sizeof(*ip)) { 5721126261Smlaier ip->ip_sum = in_cksum_hdr(ip); 5722126261Smlaier } else { 5723126261Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5724126261Smlaier } 5725126261Smlaier } 5726126261Smlaier PF_UNLOCK(); 5727126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), ro->ro_rt); 5728126261Smlaier PF_LOCK(); 5729126261Smlaier goto done; 5730126261Smlaier } 5731126261Smlaier 5732126261Smlaier#else 5733126258Smlaier /* Copied from ip_output. */ 5734130613Smlaier#ifdef IPSEC 5735130613Smlaier /* 5736130613Smlaier * If deferred crypto processing is needed, check that the 5737130613Smlaier * interface supports it. 5738130613Smlaier */ 5739130613Smlaier if ((mtag = m_tag_find(m0, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL)) 5740130613Smlaier != NULL && (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 5741130613Smlaier /* Notify IPsec to do its own crypto. */ 5742130613Smlaier ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 5743130613Smlaier goto bad; 5744130613Smlaier } 5745130613Smlaier#endif /* IPSEC */ 5746130613Smlaier 5747130613Smlaier /* Catch routing changes wrt. hardware checksumming for TCP or UDP. */ 5748130613Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) { 5749130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_TCPv4) || 5750130613Smlaier ifp->if_bridge != NULL) { 5751130613Smlaier in_delayed_cksum(m0); 5752130613Smlaier m0->m_pkthdr.csum &= ~M_TCPV4_CSUM_OUT; /* Clear */ 5753130613Smlaier } 5754130613Smlaier } else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) { 5755130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_UDPv4) || 5756130613Smlaier ifp->if_bridge != NULL) { 5757130613Smlaier in_delayed_cksum(m0); 5758130613Smlaier m0->m_pkthdr.csum &= ~M_UDPV4_CSUM_OUT; /* Clear */ 5759130613Smlaier } 5760130613Smlaier } 5761130613Smlaier 5762126258Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu) { 5763126258Smlaier if ((ifp->if_capabilities & IFCAP_CSUM_IPv4) && 5764126258Smlaier ifp->if_bridge == NULL) { 5765126258Smlaier m0->m_pkthdr.csum |= M_IPV4_CSUM_OUT; 5766126258Smlaier ipstat.ips_outhwcsum++; 5767126258Smlaier } else { 5768126258Smlaier ip->ip_sum = 0; 5769126258Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5770126258Smlaier } 5771126258Smlaier /* Update relevant hardware checksum stats for TCP/UDP */ 5772126258Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) 5773126258Smlaier tcpstat.tcps_outhwcsum++; 5774126258Smlaier else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) 5775126258Smlaier udpstat.udps_outhwcsum++; 5776126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), NULL); 5777126258Smlaier goto done; 5778126258Smlaier } 5779126261Smlaier#endif 5780126258Smlaier /* 5781126258Smlaier * Too large for interface; fragment if possible. 5782126258Smlaier * Must be able to put at least 8 bytes per fragment. 5783126258Smlaier */ 5784126258Smlaier if (ip->ip_off & htons(IP_DF)) { 5785126258Smlaier ipstat.ips_cantfrag++; 5786126258Smlaier if (r->rt != PF_DUPTO) { 5787127145Smlaier#ifdef __FreeBSD__ 5788126261Smlaier /* icmp_error() expects host byte ordering */ 5789126261Smlaier NTOHS(ip->ip_len); 5790126261Smlaier NTOHS(ip->ip_off); 5791126261Smlaier PF_UNLOCK(); 5792126258Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 5793145886Smlaier ifp->if_mtu); 5794145874Smlaier PF_LOCK(); 5795145874Smlaier#else 5796145874Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 5797145873Smlaier ifp); 5798126261Smlaier#endif 5799126258Smlaier goto done; 5800126258Smlaier } else 5801126258Smlaier goto bad; 5802126258Smlaier } 5803126258Smlaier 5804126258Smlaier m1 = m0; 5805127145Smlaier#ifdef __FreeBSD__ 5806126261Smlaier /* 5807126261Smlaier * XXX: is cheaper + less error prone than own function 5808126261Smlaier */ 5809126261Smlaier NTOHS(ip->ip_len); 5810126261Smlaier NTOHS(ip->ip_off); 5811126261Smlaier error = ip_fragment(ip, &m0, ifp->if_mtu, ifp->if_hwassist, sw_csum); 5812126261Smlaier#else 5813126258Smlaier error = ip_fragment(m0, ifp, ifp->if_mtu); 5814126261Smlaier#endif 5815127531Smlaier if (error) { 5816127531Smlaier#ifndef __FreeBSD__ /* ip_fragment does not do m_freem() on FreeBSD */ 5817127531Smlaier m0 = NULL; 5818126261Smlaier#endif 5819126258Smlaier goto bad; 5820127531Smlaier } 5821126258Smlaier 5822126258Smlaier for (m0 = m1; m0; m0 = m1) { 5823126258Smlaier m1 = m0->m_nextpkt; 5824126258Smlaier m0->m_nextpkt = 0; 5825127145Smlaier#ifdef __FreeBSD__ 5826126261Smlaier if (error == 0) { 5827126261Smlaier PF_UNLOCK(); 5828126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5829126261Smlaier NULL); 5830126261Smlaier PF_LOCK(); 5831126261Smlaier } else 5832126261Smlaier#else 5833126258Smlaier if (error == 0) 5834126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5835126258Smlaier NULL); 5836126258Smlaier else 5837126261Smlaier#endif 5838126258Smlaier m_freem(m0); 5839126258Smlaier } 5840126258Smlaier 5841126258Smlaier if (error == 0) 5842126258Smlaier ipstat.ips_fragmented++; 5843126258Smlaier 5844126258Smlaierdone: 5845126258Smlaier if (r->rt != PF_DUPTO) 5846126258Smlaier *m = NULL; 5847126258Smlaier if (ro == &iproute && ro->ro_rt) 5848126258Smlaier RTFREE(ro->ro_rt); 5849126258Smlaier return; 5850126258Smlaier 5851126258Smlaierbad: 5852126258Smlaier m_freem(m0); 5853126258Smlaier goto done; 5854126258Smlaier} 5855126258Smlaier#endif /* INET */ 5856126258Smlaier 5857126258Smlaier#ifdef INET6 5858126258Smlaiervoid 5859126258Smlaierpf_route6(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5860126258Smlaier struct pf_state *s) 5861126258Smlaier{ 5862126258Smlaier struct mbuf *m0; 5863126258Smlaier struct m_tag *mtag; 5864126258Smlaier struct route_in6 ip6route; 5865126258Smlaier struct route_in6 *ro; 5866126258Smlaier struct sockaddr_in6 *dst; 5867126258Smlaier struct ip6_hdr *ip6; 5868126258Smlaier struct ifnet *ifp = NULL; 5869126258Smlaier struct pf_addr naddr; 5870130613Smlaier struct pf_src_node *sn = NULL; 5871126258Smlaier int error = 0; 5872126258Smlaier 5873126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5874126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5875126258Smlaier panic("pf_route6: invalid parameters"); 5876126258Smlaier 5877132303Smlaier if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) { 5878132303Smlaier if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) == 5879132303Smlaier NULL) { 5880132303Smlaier m0 = *m; 5881132303Smlaier *m = NULL; 5882132303Smlaier goto bad; 5883132303Smlaier } 5884132303Smlaier *(char *)(mtag + 1) = 1; 5885132303Smlaier m_tag_prepend(*m, mtag); 5886132303Smlaier } else { 5887132303Smlaier if (*(char *)(mtag + 1) > 3) { 5888132303Smlaier m0 = *m; 5889132303Smlaier *m = NULL; 5890132303Smlaier goto bad; 5891132303Smlaier } 5892132303Smlaier (*(char *)(mtag + 1))++; 5893132303Smlaier } 5894132303Smlaier 5895126258Smlaier if (r->rt == PF_DUPTO) { 5896127145Smlaier#ifdef __FreeBSD__ 5897132303Smlaier if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL) 5898126261Smlaier#else 5899132303Smlaier if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL) 5900126261Smlaier#endif 5901126258Smlaier return; 5902126258Smlaier } else { 5903126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 5904126258Smlaier return; 5905126258Smlaier m0 = *m; 5906126258Smlaier } 5907126258Smlaier 5908145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 5909145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5910145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 5911145836Smlaier goto bad; 5912145836Smlaier } 5913126258Smlaier ip6 = mtod(m0, struct ip6_hdr *); 5914126258Smlaier 5915126258Smlaier ro = &ip6route; 5916126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 5917126258Smlaier dst = (struct sockaddr_in6 *)&ro->ro_dst; 5918126258Smlaier dst->sin6_family = AF_INET6; 5919126258Smlaier dst->sin6_len = sizeof(*dst); 5920126258Smlaier dst->sin6_addr = ip6->ip6_dst; 5921126258Smlaier 5922126258Smlaier /* Cheat. */ 5923126258Smlaier if (r->rt == PF_FASTROUTE) { 5924127145Smlaier#ifdef __FreeBSD__ 5925132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 5926126261Smlaier PF_UNLOCK(); 5927126261Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL, NULL); 5928126261Smlaier PF_LOCK(); 5929126261Smlaier#else 5930132280Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 5931132280Smlaier if (mtag == NULL) 5932132280Smlaier goto bad; 5933132280Smlaier m_tag_prepend(m0, mtag); 5934126258Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL); 5935126261Smlaier#endif 5936126258Smlaier return; 5937126258Smlaier } 5938126258Smlaier 5939145836Smlaier if (TAILQ_EMPTY(&r->rpool.list)) { 5940145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5941145836Smlaier ("pf_route6: TAILQ_EMPTY(&r->rpool.list)\n")); 5942145836Smlaier goto bad; 5943145836Smlaier } 5944126258Smlaier if (s == NULL) { 5945130613Smlaier pf_map_addr(AF_INET6, r, (struct pf_addr *)&ip6->ip6_src, 5946130613Smlaier &naddr, NULL, &sn); 5947126258Smlaier if (!PF_AZERO(&naddr, AF_INET6)) 5948126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 5949126258Smlaier &naddr, AF_INET6); 5950130613Smlaier ifp = r->rpool.cur->kif ? r->rpool.cur->kif->pfik_ifp : NULL; 5951126258Smlaier } else { 5952126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET6)) 5953126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 5954126258Smlaier &s->rt_addr, AF_INET6); 5955130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 5956126258Smlaier } 5957126258Smlaier if (ifp == NULL) 5958126258Smlaier goto bad; 5959126258Smlaier 5960126258Smlaier if (oifp != ifp) { 5961127145Smlaier#ifdef __FreeBSD__ 5962132303Smlaier PF_UNLOCK(); 5963145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL, NULL) != PF_PASS) { 5964126261Smlaier PF_LOCK(); 5965132303Smlaier goto bad; 5966132303Smlaier } else if (m0 == NULL) { 5967132303Smlaier PF_LOCK(); 5968132303Smlaier goto done; 5969132303Smlaier } 5970132303Smlaier PF_LOCK(); 5971126261Smlaier#else 5972145836Smlaier if (pf_test6(PF_OUT, ifp, &m0, NULL) != PF_PASS) 5973132303Smlaier goto bad; 5974132303Smlaier else if (m0 == NULL) 5975132303Smlaier goto done; 5976126261Smlaier#endif 5977145836Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) { 5978145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 5979145836Smlaier ("pf_route6: m0->m_len < sizeof(struct ip6_hdr)\n")); 5980145836Smlaier goto bad; 5981145836Smlaier } 5982132303Smlaier ip6 = mtod(m0, struct ip6_hdr *); 5983126258Smlaier } 5984126258Smlaier 5985126258Smlaier /* 5986126258Smlaier * If the packet is too large for the outgoing interface, 5987126258Smlaier * send back an icmp6 error. 5988126258Smlaier */ 5989126258Smlaier if (IN6_IS_ADDR_LINKLOCAL(&dst->sin6_addr)) 5990126258Smlaier dst->sin6_addr.s6_addr16[1] = htons(ifp->if_index); 5991126258Smlaier if ((u_long)m0->m_pkthdr.len <= ifp->if_mtu) { 5992127145Smlaier#ifdef __FreeBSD__ 5993126261Smlaier PF_UNLOCK(); 5994126261Smlaier#endif 5995126258Smlaier error = nd6_output(ifp, ifp, m0, dst, NULL); 5996127145Smlaier#ifdef __FreeBSD__ 5997126261Smlaier PF_LOCK(); 5998126261Smlaier#endif 5999126258Smlaier } else { 6000126258Smlaier in6_ifstat_inc(ifp, ifs6_in_toobig); 6001127145Smlaier#ifdef __FreeBSD__ 6002126261Smlaier if (r->rt != PF_DUPTO) { 6003126261Smlaier PF_UNLOCK(); 6004126261Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6005126261Smlaier PF_LOCK(); 6006126261Smlaier } else 6007126261Smlaier#else 6008126258Smlaier if (r->rt != PF_DUPTO) 6009126258Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 6010126258Smlaier else 6011126261Smlaier#endif 6012126258Smlaier goto bad; 6013126258Smlaier } 6014126258Smlaier 6015126258Smlaierdone: 6016126258Smlaier if (r->rt != PF_DUPTO) 6017126258Smlaier *m = NULL; 6018126258Smlaier return; 6019126258Smlaier 6020126258Smlaierbad: 6021126258Smlaier m_freem(m0); 6022126258Smlaier goto done; 6023126258Smlaier} 6024126258Smlaier#endif /* INET6 */ 6025126258Smlaier 6026126258Smlaier 6027127145Smlaier#ifdef __FreeBSD__ 6028126258Smlaier/* 6029132566Smlaier * FreeBSD supports cksum offloads for the following drivers. 6030137413Sru * em(4), fxp(4), ixgb(4), lge(4), ndis(4), nge(4), re(4), 6031132566Smlaier * ti(4), txp(4), xl(4) 6032132566Smlaier * 6033132566Smlaier * CSUM_DATA_VALID | CSUM_PSEUDO_HDR : 6034132566Smlaier * network driver performed cksum including pseudo header, need to verify 6035132566Smlaier * csum_data 6036132566Smlaier * CSUM_DATA_VALID : 6037132566Smlaier * network driver performed cksum, needs to additional pseudo header 6038132566Smlaier * cksum computation with partial csum_data(i.e. lack of H/W support for 6039132566Smlaier * pseudo header, for instance hme(4), sk(4) and possibly gem(4)) 6040132566Smlaier * 6041132566Smlaier * After validating the cksum of packet, set both flag CSUM_DATA_VALID and 6042132566Smlaier * CSUM_PSEUDO_HDR in order to avoid recomputation of the cksum in upper 6043132566Smlaier * TCP/UDP layer. 6044132566Smlaier * Also, set csum_data to 0xffff to force cksum validation. 6045126261Smlaier */ 6046126261Smlaierint 6047126261Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, sa_family_t af) 6048126261Smlaier{ 6049126261Smlaier u_int16_t sum = 0; 6050126261Smlaier int hw_assist = 0; 6051126261Smlaier struct ip *ip; 6052126261Smlaier 6053126261Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6054126261Smlaier return (1); 6055126261Smlaier if (m->m_pkthdr.len < off + len) 6056126261Smlaier return (1); 6057126261Smlaier 6058126261Smlaier switch (p) { 6059126261Smlaier case IPPROTO_TCP: 6060126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6061126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6062126261Smlaier sum = m->m_pkthdr.csum_data; 6063126261Smlaier } else { 6064126261Smlaier ip = mtod(m, struct ip *); 6065126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6066135078Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6067135078Smlaier m->m_pkthdr.csum_data + IPPROTO_TCP)); 6068126261Smlaier } 6069126261Smlaier sum ^= 0xffff; 6070126261Smlaier ++hw_assist; 6071126261Smlaier } 6072126261Smlaier break; 6073126261Smlaier case IPPROTO_UDP: 6074126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 6075126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 6076126261Smlaier sum = m->m_pkthdr.csum_data; 6077126261Smlaier } else { 6078126261Smlaier ip = mtod(m, struct ip *); 6079126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 6080126261Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 6081126261Smlaier m->m_pkthdr.csum_data + IPPROTO_UDP)); 6082126261Smlaier } 6083126261Smlaier sum ^= 0xffff; 6084126261Smlaier ++hw_assist; 6085126261Smlaier } 6086126261Smlaier break; 6087126261Smlaier case IPPROTO_ICMP: 6088126261Smlaier#ifdef INET6 6089126261Smlaier case IPPROTO_ICMPV6: 6090126261Smlaier#endif /* INET6 */ 6091126261Smlaier break; 6092126261Smlaier default: 6093126261Smlaier return (1); 6094126261Smlaier } 6095126261Smlaier 6096126261Smlaier if (!hw_assist) { 6097126261Smlaier switch (af) { 6098126261Smlaier case AF_INET: 6099126261Smlaier if (p == IPPROTO_ICMP) { 6100126261Smlaier if (m->m_len < off) 6101126261Smlaier return (1); 6102126261Smlaier m->m_data += off; 6103126261Smlaier m->m_len -= off; 6104126261Smlaier sum = in_cksum(m, len); 6105126261Smlaier m->m_data -= off; 6106126261Smlaier m->m_len += off; 6107126261Smlaier } else { 6108126261Smlaier if (m->m_len < sizeof(struct ip)) 6109126261Smlaier return (1); 6110126261Smlaier sum = in4_cksum(m, p, off, len); 6111126261Smlaier } 6112126261Smlaier break; 6113126261Smlaier#ifdef INET6 6114126261Smlaier case AF_INET6: 6115126261Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6116126261Smlaier return (1); 6117126261Smlaier sum = in6_cksum(m, p, off, len); 6118126261Smlaier break; 6119126261Smlaier#endif /* INET6 */ 6120126261Smlaier default: 6121126261Smlaier return (1); 6122126261Smlaier } 6123126261Smlaier } 6124126261Smlaier if (sum) { 6125126261Smlaier switch (p) { 6126126261Smlaier case IPPROTO_TCP: 6127126261Smlaier tcpstat.tcps_rcvbadsum++; 6128126261Smlaier break; 6129126261Smlaier case IPPROTO_UDP: 6130126261Smlaier udpstat.udps_badsum++; 6131126261Smlaier break; 6132126261Smlaier case IPPROTO_ICMP: 6133126261Smlaier icmpstat.icps_checksum++; 6134126261Smlaier break; 6135126261Smlaier#ifdef INET6 6136126261Smlaier case IPPROTO_ICMPV6: 6137126261Smlaier icmp6stat.icp6s_checksum++; 6138126261Smlaier break; 6139126261Smlaier#endif /* INET6 */ 6140126261Smlaier } 6141126261Smlaier return (1); 6142132566Smlaier } else { 6143132566Smlaier if (p == IPPROTO_TCP || p == IPPROTO_UDP) { 6144132566Smlaier m->m_pkthdr.csum_flags |= 6145132566Smlaier (CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 6146132566Smlaier m->m_pkthdr.csum_data = 0xffff; 6147132566Smlaier } 6148126261Smlaier } 6149126261Smlaier return (0); 6150126261Smlaier} 6151126261Smlaier#else 6152126261Smlaier/* 6153126258Smlaier * check protocol (tcp/udp/icmp/icmp6) checksum and set mbuf flag 6154126258Smlaier * off is the offset where the protocol header starts 6155126258Smlaier * len is the total length of protocol header plus payload 6156126258Smlaier * returns 0 when the checksum is valid, otherwise returns 1. 6157126258Smlaier */ 6158126258Smlaierint 6159130613Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, 6160130613Smlaier sa_family_t af) 6161126258Smlaier{ 6162126258Smlaier u_int16_t flag_ok, flag_bad; 6163126258Smlaier u_int16_t sum; 6164126258Smlaier 6165126258Smlaier switch (p) { 6166126258Smlaier case IPPROTO_TCP: 6167126258Smlaier flag_ok = M_TCP_CSUM_IN_OK; 6168126258Smlaier flag_bad = M_TCP_CSUM_IN_BAD; 6169126258Smlaier break; 6170126258Smlaier case IPPROTO_UDP: 6171126258Smlaier flag_ok = M_UDP_CSUM_IN_OK; 6172126258Smlaier flag_bad = M_UDP_CSUM_IN_BAD; 6173126258Smlaier break; 6174126258Smlaier case IPPROTO_ICMP: 6175126258Smlaier#ifdef INET6 6176126258Smlaier case IPPROTO_ICMPV6: 6177126258Smlaier#endif /* INET6 */ 6178126258Smlaier flag_ok = flag_bad = 0; 6179126258Smlaier break; 6180126258Smlaier default: 6181126258Smlaier return (1); 6182126258Smlaier } 6183126258Smlaier if (m->m_pkthdr.csum & flag_ok) 6184126258Smlaier return (0); 6185126258Smlaier if (m->m_pkthdr.csum & flag_bad) 6186126258Smlaier return (1); 6187126258Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 6188126258Smlaier return (1); 6189126258Smlaier if (m->m_pkthdr.len < off + len) 6190126258Smlaier return (1); 6191145836Smlaier switch (af) { 6192145836Smlaier#ifdef INET 6193126258Smlaier case AF_INET: 6194126258Smlaier if (p == IPPROTO_ICMP) { 6195126258Smlaier if (m->m_len < off) 6196126258Smlaier return (1); 6197126258Smlaier m->m_data += off; 6198126258Smlaier m->m_len -= off; 6199126258Smlaier sum = in_cksum(m, len); 6200126258Smlaier m->m_data -= off; 6201126258Smlaier m->m_len += off; 6202126258Smlaier } else { 6203126258Smlaier if (m->m_len < sizeof(struct ip)) 6204126258Smlaier return (1); 6205126258Smlaier sum = in4_cksum(m, p, off, len); 6206126258Smlaier } 6207126258Smlaier break; 6208145836Smlaier#endif /* INET */ 6209126258Smlaier#ifdef INET6 6210126258Smlaier case AF_INET6: 6211126258Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 6212126258Smlaier return (1); 6213126258Smlaier sum = in6_cksum(m, p, off, len); 6214126258Smlaier break; 6215126258Smlaier#endif /* INET6 */ 6216126258Smlaier default: 6217126258Smlaier return (1); 6218126258Smlaier } 6219126258Smlaier if (sum) { 6220126258Smlaier m->m_pkthdr.csum |= flag_bad; 6221126258Smlaier switch (p) { 6222126258Smlaier case IPPROTO_TCP: 6223126258Smlaier tcpstat.tcps_rcvbadsum++; 6224126258Smlaier break; 6225126258Smlaier case IPPROTO_UDP: 6226126258Smlaier udpstat.udps_badsum++; 6227126258Smlaier break; 6228126258Smlaier case IPPROTO_ICMP: 6229126258Smlaier icmpstat.icps_checksum++; 6230126258Smlaier break; 6231126258Smlaier#ifdef INET6 6232126258Smlaier case IPPROTO_ICMPV6: 6233126258Smlaier icmp6stat.icp6s_checksum++; 6234126258Smlaier break; 6235126258Smlaier#endif /* INET6 */ 6236126258Smlaier } 6237126258Smlaier return (1); 6238126258Smlaier } 6239126258Smlaier m->m_pkthdr.csum |= flag_ok; 6240126258Smlaier return (0); 6241126258Smlaier} 6242126261Smlaier#endif 6243126258Smlaier 6244130613Smlaierstatic int 6245130613Smlaierpf_add_mbuf_tag(struct mbuf *m, u_int tag) 6246130613Smlaier{ 6247130613Smlaier struct m_tag *mtag; 6248130613Smlaier 6249130613Smlaier if (m_tag_find(m, tag, NULL) != NULL) 6250130613Smlaier return (0); 6251130613Smlaier mtag = m_tag_get(tag, 0, M_NOWAIT); 6252130613Smlaier if (mtag == NULL) 6253130613Smlaier return (1); 6254130613Smlaier m_tag_prepend(m, mtag); 6255130613Smlaier return (0); 6256130613Smlaier} 6257130613Smlaier 6258126258Smlaier#ifdef INET 6259126258Smlaierint 6260135920Smlaier#ifdef __FreeBSD__ 6261145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6262145836Smlaier struct ether_header *eh, struct inpcb *inp) 6263135920Smlaier#else 6264145836Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0, 6265145836Smlaier struct ether_header *eh) 6266135920Smlaier#endif 6267126258Smlaier{ 6268130613Smlaier struct pfi_kif *kif; 6269130613Smlaier u_short action, reason = 0, log = 0; 6270130613Smlaier struct mbuf *m = *m0; 6271130613Smlaier struct ip *h = NULL; /* make the compiler happy */ 6272130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6273130613Smlaier struct pf_state *s = NULL; 6274130613Smlaier struct pf_ruleset *ruleset = NULL; 6275130613Smlaier struct pf_pdesc pd; 6276130613Smlaier int off, dirndx, pqid = 0; 6277126258Smlaier 6278127145Smlaier#ifdef __FreeBSD__ 6279126261Smlaier PF_LOCK(); 6280126261Smlaier#endif 6281126258Smlaier if (!pf_status.running || 6282127145Smlaier#ifdef __FreeBSD__ 6283132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 6284126261Smlaier PF_UNLOCK(); 6285132280Smlaier#else 6286132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 6287126261Smlaier#endif 6288126261Smlaier return (PF_PASS); 6289126261Smlaier } 6290126258Smlaier 6291145836Smlaier#ifdef __FreeBSD__ 6292145836Smlaier /* XXX_IMPORT: later */ 6293145836Smlaier#else 6294145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 6295145836Smlaier ifp = ifp->if_carpdev; 6296145836Smlaier#endif 6297145836Smlaier 6298130613Smlaier kif = pfi_index2kif[ifp->if_index]; 6299130613Smlaier if (kif == NULL) { 6300130613Smlaier#ifdef __FreeBSD__ 6301130613Smlaier PF_UNLOCK(); 6302130613Smlaier#endif 6303145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6304145836Smlaier ("pf_test: kif == NULL, if_xname %s\n", ifp->if_xname)); 6305130613Smlaier return (PF_DROP); 6306130613Smlaier } 6307145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 6308145836Smlaier#ifdef __FreeBSD__ 6309145836Smlaier PF_UNLOCK(); 6310145836Smlaier#endif 6311145836Smlaier return (PF_PASS); 6312145836Smlaier } 6313130613Smlaier 6314130613Smlaier#ifdef __FreeBSD__ 6315126261Smlaier M_ASSERTPKTHDR(m); 6316126261Smlaier#else 6317126258Smlaier#ifdef DIAGNOSTIC 6318126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6319126258Smlaier panic("non-M_PKTHDR is passed to pf_test"); 6320145836Smlaier#endif /* DIAGNOSTIC */ 6321145836Smlaier#endif /* __FreeBSD__ */ 6322126258Smlaier 6323130613Smlaier memset(&pd, 0, sizeof(pd)); 6324126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6325126258Smlaier action = PF_DROP; 6326126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6327126258Smlaier log = 1; 6328126258Smlaier goto done; 6329126258Smlaier } 6330126258Smlaier 6331126258Smlaier /* We do IP header normalization and packet reassembly here */ 6332145836Smlaier if (pf_normalize_ip(m0, dir, kif, &reason, &pd) != PF_PASS) { 6333126258Smlaier action = PF_DROP; 6334126258Smlaier goto done; 6335126258Smlaier } 6336126258Smlaier m = *m0; 6337126258Smlaier h = mtod(m, struct ip *); 6338126258Smlaier 6339126258Smlaier off = h->ip_hl << 2; 6340126258Smlaier if (off < (int)sizeof(*h)) { 6341126258Smlaier action = PF_DROP; 6342126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6343126258Smlaier log = 1; 6344126258Smlaier goto done; 6345126258Smlaier } 6346126258Smlaier 6347126258Smlaier pd.src = (struct pf_addr *)&h->ip_src; 6348126258Smlaier pd.dst = (struct pf_addr *)&h->ip_dst; 6349130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET); 6350126258Smlaier pd.ip_sum = &h->ip_sum; 6351126258Smlaier pd.proto = h->ip_p; 6352126258Smlaier pd.af = AF_INET; 6353126258Smlaier pd.tos = h->ip_tos; 6354126258Smlaier pd.tot_len = ntohs(h->ip_len); 6355145836Smlaier pd.eh = eh; 6356126258Smlaier 6357126258Smlaier /* handle fragments that didn't get reassembled by normalization */ 6358126258Smlaier if (h->ip_off & htons(IP_MF | IP_OFFMASK)) { 6359130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6360126258Smlaier &pd, &a, &ruleset); 6361126258Smlaier goto done; 6362126258Smlaier } 6363126258Smlaier 6364126258Smlaier switch (h->ip_p) { 6365126258Smlaier 6366126258Smlaier case IPPROTO_TCP: { 6367126258Smlaier struct tcphdr th; 6368126258Smlaier 6369126258Smlaier pd.hdr.tcp = &th; 6370126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6371126258Smlaier &action, &reason, AF_INET)) { 6372126258Smlaier log = action != PF_PASS; 6373126258Smlaier goto done; 6374126258Smlaier } 6375126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6376126258Smlaier ntohs(h->ip_len) - off, IPPROTO_TCP, AF_INET)) { 6377126258Smlaier action = PF_DROP; 6378126258Smlaier goto done; 6379126258Smlaier } 6380126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6381126258Smlaier if ((th.th_flags & TH_ACK) && pd.p_len == 0) 6382126258Smlaier pqid = 1; 6383130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6384126258Smlaier if (action == PF_DROP) 6385130613Smlaier goto done; 6386130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6387126258Smlaier &reason); 6388126258Smlaier if (action == PF_PASS) { 6389130613Smlaier#if NPFSYNC 6390130613Smlaier pfsync_update_state(s); 6391145836Smlaier#endif /* NPFSYNC */ 6392126258Smlaier r = s->rule.ptr; 6393130613Smlaier a = s->anchor.ptr; 6394126258Smlaier log = s->log; 6395126258Smlaier } else if (s == NULL) 6396135920Smlaier#ifdef __FreeBSD__ 6397130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6398145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6399135920Smlaier#else 6400135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6401145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6402135920Smlaier#endif 6403126258Smlaier break; 6404126258Smlaier } 6405126258Smlaier 6406126258Smlaier case IPPROTO_UDP: { 6407126258Smlaier struct udphdr uh; 6408126258Smlaier 6409126258Smlaier pd.hdr.udp = &uh; 6410126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6411126258Smlaier &action, &reason, AF_INET)) { 6412126258Smlaier log = action != PF_PASS; 6413126258Smlaier goto done; 6414126258Smlaier } 6415126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6416126258Smlaier off, ntohs(h->ip_len) - off, IPPROTO_UDP, AF_INET)) { 6417126258Smlaier action = PF_DROP; 6418126258Smlaier goto done; 6419126258Smlaier } 6420130613Smlaier if (uh.uh_dport == 0 || 6421130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6422130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6423130613Smlaier action = PF_DROP; 6424130613Smlaier goto done; 6425130613Smlaier } 6426130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6427126258Smlaier if (action == PF_PASS) { 6428130613Smlaier#if NPFSYNC 6429130613Smlaier pfsync_update_state(s); 6430145836Smlaier#endif /* NPFSYNC */ 6431126258Smlaier r = s->rule.ptr; 6432126258Smlaier a = s->anchor.ptr; 6433126258Smlaier log = s->log; 6434126258Smlaier } else if (s == NULL) 6435135920Smlaier#ifdef __FreeBSD__ 6436130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6437145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6438135920Smlaier#else 6439135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 6440145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6441135920Smlaier#endif 6442126258Smlaier break; 6443126258Smlaier } 6444126258Smlaier 6445126258Smlaier case IPPROTO_ICMP: { 6446126258Smlaier struct icmp ih; 6447126258Smlaier 6448126258Smlaier pd.hdr.icmp = &ih; 6449126258Smlaier if (!pf_pull_hdr(m, off, &ih, ICMP_MINLEN, 6450126258Smlaier &action, &reason, AF_INET)) { 6451126258Smlaier log = action != PF_PASS; 6452126258Smlaier goto done; 6453126258Smlaier } 6454126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6455126258Smlaier ntohs(h->ip_len) - off, IPPROTO_ICMP, AF_INET)) { 6456126258Smlaier action = PF_DROP; 6457126258Smlaier goto done; 6458126258Smlaier } 6459145836Smlaier action = pf_test_state_icmp(&s, dir, kif, m, off, h, &pd, 6460145836Smlaier &reason); 6461126258Smlaier if (action == PF_PASS) { 6462130613Smlaier#if NPFSYNC 6463130613Smlaier pfsync_update_state(s); 6464145836Smlaier#endif /* NPFSYNC */ 6465126258Smlaier r = s->rule.ptr; 6466126258Smlaier a = s->anchor.ptr; 6467126258Smlaier log = s->log; 6468126258Smlaier } else if (s == NULL) 6469145836Smlaier#ifdef __FreeBSD__ 6470130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6471145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 6472145836Smlaier#else 6473145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6474145836Smlaier m, off, h, &pd, &a, &ruleset, &ipintrq); 6475145836Smlaier#endif 6476126258Smlaier break; 6477126258Smlaier } 6478126258Smlaier 6479126258Smlaier default: 6480130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 6481126258Smlaier if (action == PF_PASS) { 6482130613Smlaier#if NPFSYNC 6483130613Smlaier pfsync_update_state(s); 6484145836Smlaier#endif /* NPFSYNC */ 6485126258Smlaier r = s->rule.ptr; 6486126258Smlaier a = s->anchor.ptr; 6487126258Smlaier log = s->log; 6488126258Smlaier } else if (s == NULL) 6489145836Smlaier#ifdef __FreeBSD__ 6490130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6491145836Smlaier &pd, &a, &ruleset, NULL); 6492145836Smlaier#else 6493145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6494145836Smlaier &pd, &a, &ruleset, &ipintrq); 6495145836Smlaier#endif 6496126258Smlaier break; 6497126258Smlaier } 6498126258Smlaier 6499126258Smlaierdone: 6500126258Smlaier if (action == PF_PASS && h->ip_hl > 5 && 6501126258Smlaier !((s && s->allow_opts) || r->allow_opts)) { 6502126258Smlaier action = PF_DROP; 6503145836Smlaier REASON_SET(&reason, PFRES_IPOPTIONS); 6504126258Smlaier log = 1; 6505126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 6506126258Smlaier ("pf: dropping packet with ip options\n")); 6507126258Smlaier } 6508126258Smlaier 6509145836Smlaier if (s && s->tag) 6510145836Smlaier pf_tag_packet(m, pf_get_tag(m), s->tag); 6511145836Smlaier 6512126258Smlaier#ifdef ALTQ 6513126258Smlaier if (action == PF_PASS && r->qid) { 6514126258Smlaier struct m_tag *mtag; 6515126258Smlaier struct altq_tag *atag; 6516126258Smlaier 6517126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 6518126258Smlaier if (mtag != NULL) { 6519126258Smlaier atag = (struct altq_tag *)(mtag + 1); 6520126258Smlaier if (pqid || pd.tos == IPTOS_LOWDELAY) 6521126258Smlaier atag->qid = r->pqid; 6522126258Smlaier else 6523126258Smlaier atag->qid = r->qid; 6524126258Smlaier /* add hints for ecn */ 6525126258Smlaier atag->af = AF_INET; 6526126258Smlaier atag->hdr = h; 6527126258Smlaier m_tag_prepend(m, mtag); 6528126258Smlaier } 6529126258Smlaier } 6530145836Smlaier#endif /* ALTQ */ 6531126258Smlaier 6532130613Smlaier /* 6533130613Smlaier * connections redirected to loopback should not match sockets 6534130613Smlaier * bound specifically to loopback due to security implications, 6535130613Smlaier * see tcp_input() and in_pcblookup_listen(). 6536130613Smlaier */ 6537130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 6538130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 6539130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 6540130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 6541130613Smlaier (ntohl(pd.dst->v4.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET && 6542130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 6543130613Smlaier action = PF_DROP; 6544130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 6545130613Smlaier } 6546130613Smlaier 6547126258Smlaier if (log) 6548130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET, dir, reason, r, a, ruleset); 6549126258Smlaier 6550130613Smlaier kif->pfik_bytes[0][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 6551130613Smlaier kif->pfik_packets[0][dir == PF_OUT][action != PF_PASS]++; 6552130613Smlaier 6553130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 6554130613Smlaier r->packets++; 6555130613Smlaier r->bytes += pd.tot_len; 6556130613Smlaier if (a != NULL) { 6557130613Smlaier a->packets++; 6558130613Smlaier a->bytes += pd.tot_len; 6559130613Smlaier } 6560130613Smlaier if (s != NULL) { 6561130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 6562130613Smlaier s->packets[dirndx]++; 6563130613Smlaier s->bytes[dirndx] += pd.tot_len; 6564130613Smlaier if (s->nat_rule.ptr != NULL) { 6565130613Smlaier s->nat_rule.ptr->packets++; 6566130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 6567130613Smlaier } 6568130613Smlaier if (s->src_node != NULL) { 6569130613Smlaier s->src_node->packets++; 6570130613Smlaier s->src_node->bytes += pd.tot_len; 6571130613Smlaier } 6572130613Smlaier if (s->nat_src_node != NULL) { 6573130613Smlaier s->nat_src_node->packets++; 6574130613Smlaier s->nat_src_node->bytes += pd.tot_len; 6575130613Smlaier } 6576130613Smlaier } 6577130613Smlaier tr = r; 6578130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 6579130613Smlaier if (nr != NULL) { 6580130613Smlaier struct pf_addr *x; 6581130613Smlaier /* 6582130613Smlaier * XXX: we need to make sure that the addresses 6583130613Smlaier * passed to pfr_update_stats() are the same than 6584130613Smlaier * the addresses used during matching (pfr_match) 6585130613Smlaier */ 6586130613Smlaier if (r == &pf_default_rule) { 6587130613Smlaier tr = nr; 6588130613Smlaier x = (s == NULL || s->direction == dir) ? 6589130613Smlaier &pd.baddr : &pd.naddr; 6590130613Smlaier } else 6591130613Smlaier x = (s == NULL || s->direction == dir) ? 6592130613Smlaier &pd.naddr : &pd.baddr; 6593130613Smlaier if (x == &pd.baddr || s == NULL) { 6594130613Smlaier /* we need to change the address */ 6595130613Smlaier if (dir == PF_OUT) 6596130613Smlaier pd.src = x; 6597130613Smlaier else 6598130613Smlaier pd.dst = x; 6599130613Smlaier } 6600130613Smlaier } 6601130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 6602130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 6603130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 6604130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6605145836Smlaier tr->src.neg); 6606130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 6607130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 6608130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 6609130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6610145836Smlaier tr->dst.neg); 6611130613Smlaier } 6612130613Smlaier 6613130613Smlaier 6614126258Smlaier if (action == PF_SYNPROXY_DROP) { 6615126258Smlaier m_freem(*m0); 6616126258Smlaier *m0 = NULL; 6617126258Smlaier action = PF_PASS; 6618126258Smlaier } else if (r->rt) 6619126258Smlaier /* pf_route can free the mbuf causing *m0 to become NULL */ 6620126258Smlaier pf_route(m0, r, dir, ifp, s); 6621126258Smlaier 6622127145Smlaier#ifdef __FreeBSD__ 6623126261Smlaier PF_UNLOCK(); 6624126261Smlaier#endif 6625126261Smlaier 6626126258Smlaier return (action); 6627126258Smlaier} 6628126258Smlaier#endif /* INET */ 6629126258Smlaier 6630126258Smlaier#ifdef INET6 6631126258Smlaierint 6632135920Smlaier#ifdef __FreeBSD__ 6633145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 6634145836Smlaier struct ether_header *eh, struct inpcb *inp) 6635135920Smlaier#else 6636145836Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, 6637145836Smlaier struct ether_header *eh) 6638135920Smlaier#endif 6639126258Smlaier{ 6640130613Smlaier struct pfi_kif *kif; 6641130613Smlaier u_short action, reason = 0, log = 0; 6642130613Smlaier struct mbuf *m = *m0; 6643130613Smlaier struct ip6_hdr *h = NULL; /* make the compiler happy */ 6644130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6645130613Smlaier struct pf_state *s = NULL; 6646130613Smlaier struct pf_ruleset *ruleset = NULL; 6647130613Smlaier struct pf_pdesc pd; 6648130613Smlaier int off, terminal = 0, dirndx; 6649126258Smlaier 6650127145Smlaier#ifdef __FreeBSD__ 6651126261Smlaier PF_LOCK(); 6652126261Smlaier#endif 6653126261Smlaier 6654126258Smlaier if (!pf_status.running || 6655127145Smlaier#ifdef __FreeBSD__ 6656132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 6657126261Smlaier PF_UNLOCK(); 6658132280Smlaier#else 6659132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 6660126261Smlaier#endif 6661126258Smlaier return (PF_PASS); 6662126261Smlaier } 6663126258Smlaier 6664145836Smlaier#ifdef __FreeBSD__ 6665145836Smlaier /* XXX_IMPORT: later */ 6666145836Smlaier#else 6667145836Smlaier if (ifp->if_type == IFT_CARP && ifp->if_carpdev) 6668145836Smlaier ifp = ifp->if_carpdev; 6669145836Smlaier#endif 6670145836Smlaier 6671130613Smlaier kif = pfi_index2kif[ifp->if_index]; 6672130613Smlaier if (kif == NULL) { 6673130613Smlaier#ifdef __FreeBSD__ 6674130613Smlaier PF_UNLOCK(); 6675130613Smlaier#endif 6676145836Smlaier DPFPRINTF(PF_DEBUG_URGENT, 6677145836Smlaier ("pf_test6: kif == NULL, if_xname %s\n", ifp->if_xname)); 6678130613Smlaier return (PF_DROP); 6679130613Smlaier } 6680145836Smlaier if (kif->pfik_flags & PFI_IFLAG_SKIP) { 6681145836Smlaier#ifdef __FreeBSD__ 6682145836Smlaier PF_UNLOCK(); 6683145836Smlaier#endif 6684145836Smlaier return (PF_PASS); 6685145836Smlaier } 6686130613Smlaier 6687130613Smlaier#ifdef __FreeBSD__ 6688126261Smlaier M_ASSERTPKTHDR(m); 6689126261Smlaier#else 6690126258Smlaier#ifdef DIAGNOSTIC 6691126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6692145836Smlaier panic("non-M_PKTHDR is passed to pf_test6"); 6693145836Smlaier#endif /* DIAGNOSTIC */ 6694126258Smlaier#endif 6695126258Smlaier 6696130613Smlaier memset(&pd, 0, sizeof(pd)); 6697126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6698126258Smlaier action = PF_DROP; 6699126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6700126258Smlaier log = 1; 6701126258Smlaier goto done; 6702126258Smlaier } 6703126258Smlaier 6704126258Smlaier /* We do IP header normalization and packet reassembly here */ 6705145836Smlaier if (pf_normalize_ip6(m0, dir, kif, &reason, &pd) != PF_PASS) { 6706126258Smlaier action = PF_DROP; 6707126258Smlaier goto done; 6708126258Smlaier } 6709126258Smlaier m = *m0; 6710126258Smlaier h = mtod(m, struct ip6_hdr *); 6711126258Smlaier 6712126258Smlaier pd.src = (struct pf_addr *)&h->ip6_src; 6713126258Smlaier pd.dst = (struct pf_addr *)&h->ip6_dst; 6714130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET6); 6715126258Smlaier pd.ip_sum = NULL; 6716126258Smlaier pd.af = AF_INET6; 6717126258Smlaier pd.tos = 0; 6718126258Smlaier pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); 6719145836Smlaier pd.eh = eh; 6720126258Smlaier 6721126258Smlaier off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); 6722126258Smlaier pd.proto = h->ip6_nxt; 6723126258Smlaier do { 6724126258Smlaier switch (pd.proto) { 6725126258Smlaier case IPPROTO_FRAGMENT: 6726130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6727126258Smlaier &pd, &a, &ruleset); 6728126258Smlaier if (action == PF_DROP) 6729126258Smlaier REASON_SET(&reason, PFRES_FRAG); 6730126258Smlaier goto done; 6731126258Smlaier case IPPROTO_AH: 6732126258Smlaier case IPPROTO_HOPOPTS: 6733126258Smlaier case IPPROTO_ROUTING: 6734126258Smlaier case IPPROTO_DSTOPTS: { 6735126258Smlaier /* get next header and header length */ 6736126258Smlaier struct ip6_ext opt6; 6737126258Smlaier 6738126258Smlaier if (!pf_pull_hdr(m, off, &opt6, sizeof(opt6), 6739145836Smlaier NULL, &reason, pd.af)) { 6740126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 6741126258Smlaier ("pf: IPv6 short opt\n")); 6742126258Smlaier action = PF_DROP; 6743126258Smlaier log = 1; 6744126258Smlaier goto done; 6745126258Smlaier } 6746126258Smlaier if (pd.proto == IPPROTO_AH) 6747126258Smlaier off += (opt6.ip6e_len + 2) * 4; 6748126258Smlaier else 6749126258Smlaier off += (opt6.ip6e_len + 1) * 8; 6750126258Smlaier pd.proto = opt6.ip6e_nxt; 6751126258Smlaier /* goto the next header */ 6752126258Smlaier break; 6753126258Smlaier } 6754126258Smlaier default: 6755126258Smlaier terminal++; 6756126258Smlaier break; 6757126258Smlaier } 6758126258Smlaier } while (!terminal); 6759126258Smlaier 6760126258Smlaier switch (pd.proto) { 6761126258Smlaier 6762126258Smlaier case IPPROTO_TCP: { 6763126258Smlaier struct tcphdr th; 6764126258Smlaier 6765126258Smlaier pd.hdr.tcp = &th; 6766126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6767126258Smlaier &action, &reason, AF_INET6)) { 6768126258Smlaier log = action != PF_PASS; 6769126258Smlaier goto done; 6770126258Smlaier } 6771126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6772138387Sdhartmei ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6773138387Sdhartmei IPPROTO_TCP, AF_INET6)) { 6774126258Smlaier action = PF_DROP; 6775145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6776126258Smlaier goto done; 6777126258Smlaier } 6778126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6779130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6780126258Smlaier if (action == PF_DROP) 6781130613Smlaier goto done; 6782130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6783126258Smlaier &reason); 6784126258Smlaier if (action == PF_PASS) { 6785130613Smlaier#if NPFSYNC 6786130613Smlaier pfsync_update_state(s); 6787145836Smlaier#endif /* NPFSYNC */ 6788126258Smlaier r = s->rule.ptr; 6789130613Smlaier a = s->anchor.ptr; 6790126258Smlaier log = s->log; 6791126258Smlaier } else if (s == NULL) 6792135920Smlaier#ifdef __FreeBSD__ 6793130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6794145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6795135920Smlaier#else 6796135920Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6797145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6798135920Smlaier#endif 6799126258Smlaier break; 6800126258Smlaier } 6801126258Smlaier 6802126258Smlaier case IPPROTO_UDP: { 6803126258Smlaier struct udphdr uh; 6804126258Smlaier 6805126258Smlaier pd.hdr.udp = &uh; 6806126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6807126258Smlaier &action, &reason, AF_INET6)) { 6808126258Smlaier log = action != PF_PASS; 6809126258Smlaier goto done; 6810126258Smlaier } 6811126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6812138387Sdhartmei off, ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6813138387Sdhartmei IPPROTO_UDP, AF_INET6)) { 6814126258Smlaier action = PF_DROP; 6815145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6816126258Smlaier goto done; 6817126258Smlaier } 6818130613Smlaier if (uh.uh_dport == 0 || 6819130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6820130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6821130613Smlaier action = PF_DROP; 6822130613Smlaier goto done; 6823130613Smlaier } 6824130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6825126258Smlaier if (action == PF_PASS) { 6826130613Smlaier#if NPFSYNC 6827130613Smlaier pfsync_update_state(s); 6828145836Smlaier#endif /* NPFSYNC */ 6829126258Smlaier r = s->rule.ptr; 6830130613Smlaier a = s->anchor.ptr; 6831126258Smlaier log = s->log; 6832126258Smlaier } else if (s == NULL) 6833135920Smlaier#ifdef __FreeBSD__ 6834130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6835145836Smlaier m, off, h, &pd, &a, &ruleset, NULL, inp); 6836135920Smlaier#else 6837135920Smlaier action = pf_test_udp(&r, &s, dir, kif, 6838145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6839135920Smlaier#endif 6840126258Smlaier break; 6841126258Smlaier } 6842126258Smlaier 6843126258Smlaier case IPPROTO_ICMPV6: { 6844126258Smlaier struct icmp6_hdr ih; 6845126258Smlaier 6846126258Smlaier pd.hdr.icmp6 = &ih; 6847126258Smlaier if (!pf_pull_hdr(m, off, &ih, sizeof(ih), 6848126258Smlaier &action, &reason, AF_INET6)) { 6849126258Smlaier log = action != PF_PASS; 6850126258Smlaier goto done; 6851126258Smlaier } 6852126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6853145836Smlaier ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)), 6854138387Sdhartmei IPPROTO_ICMPV6, AF_INET6)) { 6855126258Smlaier action = PF_DROP; 6856145836Smlaier REASON_SET(&reason, PFRES_PROTCKSUM); 6857126258Smlaier goto done; 6858126258Smlaier } 6859130613Smlaier action = pf_test_state_icmp(&s, dir, kif, 6860145836Smlaier m, off, h, &pd, &reason); 6861126258Smlaier if (action == PF_PASS) { 6862130613Smlaier#if NPFSYNC 6863130613Smlaier pfsync_update_state(s); 6864145836Smlaier#endif /* NPFSYNC */ 6865126258Smlaier r = s->rule.ptr; 6866130613Smlaier a = s->anchor.ptr; 6867126258Smlaier log = s->log; 6868126258Smlaier } else if (s == NULL) 6869145836Smlaier#ifdef __FreeBSD__ 6870130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6871145836Smlaier m, off, h, &pd, &a, &ruleset, NULL); 6872145836Smlaier#else 6873145836Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6874145836Smlaier m, off, h, &pd, &a, &ruleset, &ip6intrq); 6875145836Smlaier#endif 6876126258Smlaier break; 6877126258Smlaier } 6878126258Smlaier 6879126258Smlaier default: 6880130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 6881130613Smlaier if (action == PF_PASS) { 6882145836Smlaier#if NPFSYNC 6883145836Smlaier pfsync_update_state(s); 6884145836Smlaier#endif /* NPFSYNC */ 6885130613Smlaier r = s->rule.ptr; 6886130613Smlaier a = s->anchor.ptr; 6887130613Smlaier log = s->log; 6888130613Smlaier } else if (s == NULL) 6889145836Smlaier#ifdef __FreeBSD__ 6890130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6891145836Smlaier &pd, &a, &ruleset, NULL); 6892145836Smlaier#else 6893145836Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6894145836Smlaier &pd, &a, &ruleset, &ip6intrq); 6895145836Smlaier#endif 6896126258Smlaier break; 6897126258Smlaier } 6898126258Smlaier 6899126258Smlaierdone: 6900126258Smlaier /* XXX handle IPv6 options, if not allowed. not implemented. */ 6901126258Smlaier 6902145836Smlaier if (s && s->tag) 6903145836Smlaier pf_tag_packet(m, pf_get_tag(m), s->tag); 6904145836Smlaier 6905126258Smlaier#ifdef ALTQ 6906126258Smlaier if (action == PF_PASS && r->qid) { 6907126258Smlaier struct m_tag *mtag; 6908126258Smlaier struct altq_tag *atag; 6909126258Smlaier 6910126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 6911126258Smlaier if (mtag != NULL) { 6912126258Smlaier atag = (struct altq_tag *)(mtag + 1); 6913126258Smlaier if (pd.tos == IPTOS_LOWDELAY) 6914126258Smlaier atag->qid = r->pqid; 6915126258Smlaier else 6916126258Smlaier atag->qid = r->qid; 6917126258Smlaier /* add hints for ecn */ 6918126258Smlaier atag->af = AF_INET6; 6919126258Smlaier atag->hdr = h; 6920126258Smlaier m_tag_prepend(m, mtag); 6921126258Smlaier } 6922126258Smlaier } 6923145836Smlaier#endif /* ALTQ */ 6924126258Smlaier 6925130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 6926130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 6927130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 6928130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 6929130613Smlaier IN6_IS_ADDR_LOOPBACK(&pd.dst->v6) && 6930130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 6931130613Smlaier action = PF_DROP; 6932130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 6933130613Smlaier } 6934130613Smlaier 6935126258Smlaier if (log) 6936130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET6, dir, reason, r, a, ruleset); 6937126258Smlaier 6938130613Smlaier kif->pfik_bytes[1][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 6939130613Smlaier kif->pfik_packets[1][dir == PF_OUT][action != PF_PASS]++; 6940130613Smlaier 6941130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 6942130613Smlaier r->packets++; 6943130613Smlaier r->bytes += pd.tot_len; 6944130613Smlaier if (a != NULL) { 6945130613Smlaier a->packets++; 6946130613Smlaier a->bytes += pd.tot_len; 6947130613Smlaier } 6948130613Smlaier if (s != NULL) { 6949130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 6950130613Smlaier s->packets[dirndx]++; 6951130613Smlaier s->bytes[dirndx] += pd.tot_len; 6952130613Smlaier if (s->nat_rule.ptr != NULL) { 6953130613Smlaier s->nat_rule.ptr->packets++; 6954130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 6955130613Smlaier } 6956130613Smlaier if (s->src_node != NULL) { 6957130613Smlaier s->src_node->packets++; 6958130613Smlaier s->src_node->bytes += pd.tot_len; 6959130613Smlaier } 6960130613Smlaier if (s->nat_src_node != NULL) { 6961130613Smlaier s->nat_src_node->packets++; 6962130613Smlaier s->nat_src_node->bytes += pd.tot_len; 6963130613Smlaier } 6964130613Smlaier } 6965130613Smlaier tr = r; 6966130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 6967130613Smlaier if (nr != NULL) { 6968130613Smlaier struct pf_addr *x; 6969130613Smlaier /* 6970130613Smlaier * XXX: we need to make sure that the addresses 6971130613Smlaier * passed to pfr_update_stats() are the same than 6972130613Smlaier * the addresses used during matching (pfr_match) 6973130613Smlaier */ 6974130613Smlaier if (r == &pf_default_rule) { 6975130613Smlaier tr = nr; 6976130613Smlaier x = (s == NULL || s->direction == dir) ? 6977130613Smlaier &pd.baddr : &pd.naddr; 6978130613Smlaier } else { 6979130613Smlaier x = (s == NULL || s->direction == dir) ? 6980130613Smlaier &pd.naddr : &pd.baddr; 6981130613Smlaier } 6982130613Smlaier if (x == &pd.baddr || s == NULL) { 6983130613Smlaier if (dir == PF_OUT) 6984130613Smlaier pd.src = x; 6985130613Smlaier else 6986130613Smlaier pd.dst = x; 6987130613Smlaier } 6988130613Smlaier } 6989130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 6990130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 6991130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 6992130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6993145836Smlaier tr->src.neg); 6994130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 6995130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 6996130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 6997130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6998145836Smlaier tr->dst.neg); 6999130613Smlaier } 7000130613Smlaier 7001130613Smlaier 7002126258Smlaier if (action == PF_SYNPROXY_DROP) { 7003126258Smlaier m_freem(*m0); 7004126258Smlaier *m0 = NULL; 7005126258Smlaier action = PF_PASS; 7006126258Smlaier } else if (r->rt) 7007126258Smlaier /* pf_route6 can free the mbuf causing *m0 to become NULL */ 7008126258Smlaier pf_route6(m0, r, dir, ifp, s); 7009126258Smlaier 7010127145Smlaier#ifdef __FreeBSD__ 7011126261Smlaier PF_UNLOCK(); 7012126261Smlaier#endif 7013126258Smlaier return (action); 7014126258Smlaier} 7015126258Smlaier#endif /* INET6 */ 7016145836Smlaier 7017145836Smlaierint 7018145836Smlaierpf_check_congestion(struct ifqueue *ifq) 7019145836Smlaier{ 7020145836Smlaier#ifdef __FreeBSD__ 7021145836Smlaier /* XXX_IMPORT: later */ 7022145836Smlaier return (0); 7023145836Smlaier#else 7024145836Smlaier if (ifq->ifq_congestion) 7025145836Smlaier return (1); 7026145836Smlaier else 7027145836Smlaier return (0); 7028145836Smlaier#endif 7029145836Smlaier} 7030