pf.c revision 132280
1126261Smlaier/* $FreeBSD: head/sys/contrib/pf/net/pf.c 132280 2004-07-17 05:10:06Z mlaier $ */ 2130639Smlaier/* $OpenBSD: pf.c,v 1.433.2.1 2004/04/30 21:46:33 brad 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> 90126258Smlaier 91127145Smlaier#ifndef __FreeBSD__ 92126258Smlaier#include <dev/rndvar.h> 93126261Smlaier#endif 94126258Smlaier#include <net/pfvar.h> 95126258Smlaier#include <net/if_pflog.h> 96130613Smlaier 97130613Smlaier#if NPFSYNC > 0 98126258Smlaier#include <net/if_pfsync.h> 99130613Smlaier#endif /* NPFSYNC > 0 */ 100126258Smlaier 101126258Smlaier#ifdef INET6 102126258Smlaier#include <netinet/ip6.h> 103126258Smlaier#include <netinet/in_pcb.h> 104126258Smlaier#include <netinet/icmp6.h> 105126258Smlaier#include <netinet6/nd6.h> 106127145Smlaier#ifdef __FreeBSD__ 107126261Smlaier#include <netinet6/ip6_var.h> 108126261Smlaier#include <netinet6/in6_pcb.h> 109126261Smlaier#endif 110126258Smlaier#endif /* INET6 */ 111126258Smlaier 112127145Smlaier#ifdef __FreeBSD__ 113126261Smlaier#include <machine/in_cksum.h> 114126261Smlaier#include <sys/limits.h> 115126261Smlaier#include <sys/ucred.h> 116126258Smlaier 117126261Smlaierextern int ip_optcopy(struct ip *, struct ip *); 118126261Smlaier#endif 119126261Smlaier 120126258Smlaier#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x 121126258Smlaier 122126258Smlaier/* 123126258Smlaier * Global variables 124126258Smlaier */ 125126258Smlaier 126126258Smlaierstruct pf_anchorqueue pf_anchors; 127126258Smlaierstruct pf_ruleset pf_main_ruleset; 128126258Smlaierstruct pf_altqqueue pf_altqs[2]; 129126258Smlaierstruct pf_palist pf_pabuf; 130126258Smlaierstruct pf_altqqueue *pf_altqs_active; 131126258Smlaierstruct pf_altqqueue *pf_altqs_inactive; 132126258Smlaierstruct pf_status pf_status; 133126258Smlaier 134126258Smlaieru_int32_t ticket_altqs_active; 135126258Smlaieru_int32_t ticket_altqs_inactive; 136130613Smlaierint altqs_inactive_open; 137126258Smlaieru_int32_t ticket_pabuf; 138126258Smlaier 139127145Smlaier#ifdef __FreeBSD__ 140126261Smlaierstruct callout pf_expire_to; /* expire timeout */ 141126261Smlaier#else 142126258Smlaierstruct timeout pf_expire_to; /* expire timeout */ 143126261Smlaier#endif 144126258Smlaier 145126261Smlaier 146127145Smlaier#ifdef __FreeBSD__ 147130613Smlaieruma_zone_t pf_src_tree_pl, pf_rule_pl; 148126261Smlaieruma_zone_t pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 149126261Smlaier#else 150130613Smlaierstruct pool pf_src_tree_pl, pf_rule_pl; 151126258Smlaierstruct pool pf_state_pl, pf_altq_pl, pf_pooladdr_pl; 152126261Smlaier#endif 153126258Smlaier 154126258Smlaiervoid pf_print_host(struct pf_addr *, u_int16_t, u_int8_t); 155126258Smlaiervoid pf_print_state(struct pf_state *); 156126258Smlaiervoid pf_print_flags(u_int8_t); 157126258Smlaier 158126258Smlaieru_int16_t pf_cksum_fixup(u_int16_t, u_int16_t, u_int16_t, 159126258Smlaier u_int8_t); 160126258Smlaiervoid pf_change_ap(struct pf_addr *, u_int16_t *, 161126258Smlaier u_int16_t *, u_int16_t *, struct pf_addr *, 162126258Smlaier u_int16_t, u_int8_t, sa_family_t); 163126258Smlaier#ifdef INET6 164126258Smlaiervoid pf_change_a6(struct pf_addr *, u_int16_t *, 165126258Smlaier struct pf_addr *, u_int8_t); 166126258Smlaier#endif /* INET6 */ 167126258Smlaiervoid pf_change_icmp(struct pf_addr *, u_int16_t *, 168126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 169126258Smlaier u_int16_t *, u_int16_t *, u_int16_t *, 170126258Smlaier u_int16_t *, u_int8_t, sa_family_t); 171126258Smlaiervoid pf_send_tcp(const struct pf_rule *, sa_family_t, 172126258Smlaier const struct pf_addr *, const struct pf_addr *, 173126258Smlaier u_int16_t, u_int16_t, u_int32_t, u_int32_t, 174126258Smlaier u_int8_t, u_int16_t, u_int16_t, u_int8_t); 175126258Smlaiervoid pf_send_icmp(struct mbuf *, u_int8_t, u_int8_t, 176126258Smlaier sa_family_t, struct pf_rule *); 177126258Smlaierstruct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *, 178130613Smlaier int, int, struct pfi_kif *, 179126258Smlaier struct pf_addr *, u_int16_t, struct pf_addr *, 180126258Smlaier u_int16_t, int); 181126258Smlaierstruct pf_rule *pf_get_translation(struct pf_pdesc *, struct mbuf *, 182130613Smlaier int, int, struct pfi_kif *, struct pf_src_node **, 183126258Smlaier struct pf_addr *, u_int16_t, 184126258Smlaier struct pf_addr *, u_int16_t, 185126258Smlaier struct pf_addr *, u_int16_t *); 186126258Smlaierint pf_test_tcp(struct pf_rule **, struct pf_state **, 187130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 188126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 189126258Smlaier struct pf_ruleset **); 190126258Smlaierint pf_test_udp(struct pf_rule **, struct pf_state **, 191130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 192126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 193126258Smlaier struct pf_ruleset **); 194126258Smlaierint pf_test_icmp(struct pf_rule **, struct pf_state **, 195130613Smlaier int, struct pfi_kif *, struct mbuf *, int, 196126258Smlaier void *, struct pf_pdesc *, struct pf_rule **, 197126258Smlaier struct pf_ruleset **); 198126258Smlaierint pf_test_other(struct pf_rule **, struct pf_state **, 199130613Smlaier int, struct pfi_kif *, struct mbuf *, int, void *, 200126258Smlaier struct pf_pdesc *, struct pf_rule **, 201126258Smlaier struct pf_ruleset **); 202126258Smlaierint pf_test_fragment(struct pf_rule **, int, 203130613Smlaier struct pfi_kif *, struct mbuf *, void *, 204126258Smlaier struct pf_pdesc *, struct pf_rule **, 205126258Smlaier struct pf_ruleset **); 206126258Smlaierint pf_test_state_tcp(struct pf_state **, int, 207130613Smlaier struct pfi_kif *, struct mbuf *, int, 208126258Smlaier void *, struct pf_pdesc *, u_short *); 209126258Smlaierint pf_test_state_udp(struct pf_state **, int, 210130613Smlaier struct pfi_kif *, struct mbuf *, int, 211126258Smlaier void *, struct pf_pdesc *); 212126258Smlaierint pf_test_state_icmp(struct pf_state **, int, 213130613Smlaier struct pfi_kif *, struct mbuf *, int, 214126258Smlaier void *, struct pf_pdesc *); 215126258Smlaierint pf_test_state_other(struct pf_state **, int, 216130613Smlaier struct pfi_kif *, struct pf_pdesc *); 217126258Smlaierstruct pf_tag *pf_get_tag(struct mbuf *); 218126258Smlaierint pf_match_tag(struct mbuf *, struct pf_rule *, 219130613Smlaier struct pf_rule *, struct pf_tag *, int *); 220126258Smlaiervoid pf_hash(struct pf_addr *, struct pf_addr *, 221126258Smlaier struct pf_poolhashkey *, sa_family_t); 222130613Smlaierint pf_map_addr(u_int8_t, struct pf_rule *, 223126258Smlaier struct pf_addr *, struct pf_addr *, 224130613Smlaier struct pf_addr *, struct pf_src_node **); 225130613Smlaierint pf_get_sport(sa_family_t, u_int8_t, struct pf_rule *, 226126258Smlaier struct pf_addr *, struct pf_addr *, u_int16_t, 227130613Smlaier struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t, 228130613Smlaier struct pf_src_node **); 229126258Smlaiervoid pf_route(struct mbuf **, struct pf_rule *, int, 230126258Smlaier struct ifnet *, struct pf_state *); 231126258Smlaiervoid pf_route6(struct mbuf **, struct pf_rule *, int, 232126258Smlaier struct ifnet *, struct pf_state *); 233130613Smlaierint pf_socket_lookup(uid_t *, gid_t *, 234126258Smlaier int, struct pf_pdesc *); 235126258Smlaieru_int8_t pf_get_wscale(struct mbuf *, int, u_int16_t, 236126258Smlaier sa_family_t); 237126258Smlaieru_int16_t pf_get_mss(struct mbuf *, int, u_int16_t, 238126258Smlaier sa_family_t); 239126258Smlaieru_int16_t pf_calc_mss(struct pf_addr *, sa_family_t, 240126258Smlaier u_int16_t); 241126258Smlaiervoid pf_set_rt_ifp(struct pf_state *, 242126258Smlaier struct pf_addr *); 243126258Smlaierint pf_check_proto_cksum(struct mbuf *, int, int, 244126258Smlaier u_int8_t, sa_family_t); 245126258Smlaierint pf_addr_wrap_neq(struct pf_addr_wrap *, 246126258Smlaier struct pf_addr_wrap *); 247130613Smlaierstatic int pf_add_mbuf_tag(struct mbuf *, u_int); 248130613Smlaierstruct pf_state *pf_find_state_recurse(struct pfi_kif *, 249130613Smlaier struct pf_state *, u_int8_t); 250126258Smlaier 251127145Smlaier#ifdef __FreeBSD__ 252126261Smlaierint in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len); 253126258Smlaier 254126261Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 255126261Smlaier#else 256130613Smlaierstruct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX] = { 257130613Smlaier { &pf_state_pl, PFSTATE_HIWAT }, 258130613Smlaier { &pf_src_tree_pl, PFSNODE_HIWAT }, 259130613Smlaier { &pf_frent_pl, PFFRAG_FRENT_HIWAT } 260130613Smlaier}; 261126261Smlaier#endif 262126258Smlaier 263126258Smlaier#define STATE_LOOKUP() \ 264126258Smlaier do { \ 265126258Smlaier if (direction == PF_IN) \ 266130613Smlaier *state = pf_find_state_recurse( \ 267130613Smlaier kif, &key, PF_EXT_GWY); \ 268126258Smlaier else \ 269130613Smlaier *state = pf_find_state_recurse( \ 270130613Smlaier kif, &key, PF_LAN_EXT); \ 271126258Smlaier if (*state == NULL) \ 272126258Smlaier return (PF_DROP); \ 273126258Smlaier if (direction == PF_OUT && \ 274126258Smlaier (((*state)->rule.ptr->rt == PF_ROUTETO && \ 275126258Smlaier (*state)->rule.ptr->direction == PF_OUT) || \ 276126258Smlaier ((*state)->rule.ptr->rt == PF_REPLYTO && \ 277126258Smlaier (*state)->rule.ptr->direction == PF_IN)) && \ 278130613Smlaier (*state)->rt_kif != NULL && \ 279130613Smlaier (*state)->rt_kif != kif) \ 280126258Smlaier return (PF_PASS); \ 281126258Smlaier } while (0) 282126258Smlaier 283126258Smlaier#define STATE_TRANSLATE(s) \ 284126258Smlaier (s)->lan.addr.addr32[0] != (s)->gwy.addr.addr32[0] || \ 285126258Smlaier ((s)->af == AF_INET6 && \ 286126258Smlaier ((s)->lan.addr.addr32[1] != (s)->gwy.addr.addr32[1] || \ 287126258Smlaier (s)->lan.addr.addr32[2] != (s)->gwy.addr.addr32[2] || \ 288126258Smlaier (s)->lan.addr.addr32[3] != (s)->gwy.addr.addr32[3])) || \ 289126258Smlaier (s)->lan.port != (s)->gwy.port 290126258Smlaier 291130613Smlaier#define BOUND_IFACE(r, k) (((r)->rule_flag & PFRULE_IFBOUND) ? (k) : \ 292130613Smlaier ((r)->rule_flag & PFRULE_GRBOUND) ? (k)->pfik_parent : \ 293130613Smlaier (k)->pfik_parent->pfik_parent) 294126258Smlaier 295130613Smlaierstatic __inline int pf_src_compare(struct pf_src_node *, struct pf_src_node *); 296130613Smlaierstatic __inline int pf_state_compare_lan_ext(struct pf_state *, 297130613Smlaier struct pf_state *); 298130613Smlaierstatic __inline int pf_state_compare_ext_gwy(struct pf_state *, 299130613Smlaier struct pf_state *); 300130613Smlaierstatic __inline int pf_state_compare_id(struct pf_state *, 301130613Smlaier struct pf_state *); 302126258Smlaier 303130613Smlaierstruct pf_src_tree tree_src_tracking; 304130613Smlaier 305130613Smlaierstruct pf_state_tree_id tree_id; 306130613Smlaierstruct pf_state_queue state_updates; 307130613Smlaier 308130613SmlaierRB_GENERATE(pf_src_tree, pf_src_node, entry, pf_src_compare); 309130613SmlaierRB_GENERATE(pf_state_tree_lan_ext, pf_state, 310130613Smlaier u.s.entry_lan_ext, pf_state_compare_lan_ext); 311130613SmlaierRB_GENERATE(pf_state_tree_ext_gwy, pf_state, 312130613Smlaier u.s.entry_ext_gwy, pf_state_compare_ext_gwy); 313130613SmlaierRB_GENERATE(pf_state_tree_id, pf_state, 314130613Smlaier u.s.entry_id, pf_state_compare_id); 315130613Smlaier 316127145Smlaier#ifdef __FreeBSD__ 317126409Smlaierstatic int 318126409Smlaier#else 319126258Smlaierstatic __inline int 320126409Smlaier#endif 321130613Smlaierpf_src_compare(struct pf_src_node *a, struct pf_src_node *b) 322126258Smlaier{ 323126258Smlaier int diff; 324126258Smlaier 325130613Smlaier if (a->rule.ptr > b->rule.ptr) 326130613Smlaier return (1); 327130613Smlaier if (a->rule.ptr < b->rule.ptr) 328130613Smlaier return (-1); 329130613Smlaier if ((diff = a->af - b->af) != 0) 330130613Smlaier return (diff); 331130613Smlaier switch (a->af) { 332130613Smlaier#ifdef INET 333130613Smlaier case AF_INET: 334130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 335130613Smlaier return (1); 336130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 337130613Smlaier return (-1); 338130613Smlaier break; 339130613Smlaier#endif /* INET */ 340130613Smlaier#ifdef INET6 341130613Smlaier case AF_INET6: 342130613Smlaier if (a->addr.addr32[3] > b->addr.addr32[3]) 343130613Smlaier return (1); 344130613Smlaier if (a->addr.addr32[3] < b->addr.addr32[3]) 345130613Smlaier return (-1); 346130613Smlaier if (a->addr.addr32[2] > b->addr.addr32[2]) 347130613Smlaier return (1); 348130613Smlaier if (a->addr.addr32[2] < b->addr.addr32[2]) 349130613Smlaier return (-1); 350130613Smlaier if (a->addr.addr32[1] > b->addr.addr32[1]) 351130613Smlaier return (1); 352130613Smlaier if (a->addr.addr32[1] < b->addr.addr32[1]) 353130613Smlaier return (-1); 354130613Smlaier if (a->addr.addr32[0] > b->addr.addr32[0]) 355130613Smlaier return (1); 356130613Smlaier if (a->addr.addr32[0] < b->addr.addr32[0]) 357130613Smlaier return (-1); 358130613Smlaier break; 359130613Smlaier#endif /* INET6 */ 360130613Smlaier } 361130613Smlaier return (0); 362130613Smlaier} 363130613Smlaier 364130613Smlaier#ifdef __FreeBSD__ 365130613Smlaierstatic int 366130613Smlaier#else 367130613Smlaierstatic __inline int 368130613Smlaier#endif 369130613Smlaierpf_state_compare_lan_ext(struct pf_state *a, struct pf_state *b) 370130613Smlaier{ 371130613Smlaier int diff; 372130613Smlaier 373126258Smlaier if ((diff = a->proto - b->proto) != 0) 374126258Smlaier return (diff); 375126258Smlaier if ((diff = a->af - b->af) != 0) 376126258Smlaier return (diff); 377126258Smlaier switch (a->af) { 378126258Smlaier#ifdef INET 379126258Smlaier case AF_INET: 380130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 381126258Smlaier return (1); 382130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 383126258Smlaier return (-1); 384130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 385126258Smlaier return (1); 386130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 387126258Smlaier return (-1); 388126258Smlaier break; 389126258Smlaier#endif /* INET */ 390126258Smlaier#ifdef INET6 391126258Smlaier case AF_INET6: 392130613Smlaier if (a->lan.addr.addr32[3] > b->lan.addr.addr32[3]) 393126258Smlaier return (1); 394130613Smlaier if (a->lan.addr.addr32[3] < b->lan.addr.addr32[3]) 395126258Smlaier return (-1); 396130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 397126258Smlaier return (1); 398130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 399126258Smlaier return (-1); 400130613Smlaier if (a->lan.addr.addr32[2] > b->lan.addr.addr32[2]) 401126258Smlaier return (1); 402130613Smlaier if (a->lan.addr.addr32[2] < b->lan.addr.addr32[2]) 403126258Smlaier return (-1); 404130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 405126258Smlaier return (1); 406130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 407126258Smlaier return (-1); 408130613Smlaier if (a->lan.addr.addr32[1] > b->lan.addr.addr32[1]) 409126258Smlaier return (1); 410130613Smlaier if (a->lan.addr.addr32[1] < b->lan.addr.addr32[1]) 411126258Smlaier return (-1); 412130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 413126258Smlaier return (1); 414130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 415126258Smlaier return (-1); 416130613Smlaier if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0]) 417126258Smlaier return (1); 418130613Smlaier if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0]) 419126258Smlaier return (-1); 420130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 421126258Smlaier return (1); 422130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 423126258Smlaier return (-1); 424126258Smlaier break; 425126258Smlaier#endif /* INET6 */ 426126258Smlaier } 427126258Smlaier 428130613Smlaier if ((diff = a->lan.port - b->lan.port) != 0) 429126258Smlaier return (diff); 430130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 431126258Smlaier return (diff); 432126258Smlaier 433126258Smlaier return (0); 434126258Smlaier} 435126258Smlaier 436130613Smlaier#ifdef __FreeBSD__ 437130613Smlaierstatic int 438130613Smlaier#else 439130613Smlaierstatic __inline int 440130613Smlaier#endif 441130613Smlaierpf_state_compare_ext_gwy(struct pf_state *a, struct pf_state *b) 442130613Smlaier{ 443130613Smlaier int diff; 444130613Smlaier 445130613Smlaier if ((diff = a->proto - b->proto) != 0) 446130613Smlaier return (diff); 447130613Smlaier if ((diff = a->af - b->af) != 0) 448130613Smlaier return (diff); 449130613Smlaier switch (a->af) { 450130613Smlaier#ifdef INET 451130613Smlaier case AF_INET: 452130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 453130613Smlaier return (1); 454130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 455130613Smlaier return (-1); 456130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 457130613Smlaier return (1); 458130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 459130613Smlaier return (-1); 460130613Smlaier break; 461130613Smlaier#endif /* INET */ 462126258Smlaier#ifdef INET6 463130613Smlaier case AF_INET6: 464130613Smlaier if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3]) 465130613Smlaier return (1); 466130613Smlaier if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3]) 467130613Smlaier return (-1); 468130613Smlaier if (a->gwy.addr.addr32[3] > b->gwy.addr.addr32[3]) 469130613Smlaier return (1); 470130613Smlaier if (a->gwy.addr.addr32[3] < b->gwy.addr.addr32[3]) 471130613Smlaier return (-1); 472130613Smlaier if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2]) 473130613Smlaier return (1); 474130613Smlaier if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2]) 475130613Smlaier return (-1); 476130613Smlaier if (a->gwy.addr.addr32[2] > b->gwy.addr.addr32[2]) 477130613Smlaier return (1); 478130613Smlaier if (a->gwy.addr.addr32[2] < b->gwy.addr.addr32[2]) 479130613Smlaier return (-1); 480130613Smlaier if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1]) 481130613Smlaier return (1); 482130613Smlaier if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1]) 483130613Smlaier return (-1); 484130613Smlaier if (a->gwy.addr.addr32[1] > b->gwy.addr.addr32[1]) 485130613Smlaier return (1); 486130613Smlaier if (a->gwy.addr.addr32[1] < b->gwy.addr.addr32[1]) 487130613Smlaier return (-1); 488130613Smlaier if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0]) 489130613Smlaier return (1); 490130613Smlaier if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0]) 491130613Smlaier return (-1); 492130613Smlaier if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0]) 493130613Smlaier return (1); 494130613Smlaier if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0]) 495130613Smlaier return (-1); 496130613Smlaier break; 497130613Smlaier#endif /* INET6 */ 498130613Smlaier } 499130613Smlaier 500130613Smlaier if ((diff = a->ext.port - b->ext.port) != 0) 501130613Smlaier return (diff); 502130613Smlaier if ((diff = a->gwy.port - b->gwy.port) != 0) 503130613Smlaier return (diff); 504130613Smlaier 505130613Smlaier return (0); 506130613Smlaier} 507130613Smlaier 508130613Smlaier#ifdef __FreeBSD__ 509130613Smlaierstatic int 510130613Smlaier#else 511130613Smlaierstatic __inline int 512130613Smlaier#endif 513130613Smlaierpf_state_compare_id(struct pf_state *a, struct pf_state *b) 514130613Smlaier{ 515130613Smlaier if (a->id > b->id) 516130613Smlaier return (1); 517130613Smlaier if (a->id < b->id) 518130613Smlaier return (-1); 519130613Smlaier if (a->creatorid > b->creatorid) 520130613Smlaier return (1); 521130613Smlaier if (a->creatorid < b->creatorid) 522130613Smlaier return (-1); 523130613Smlaier 524130613Smlaier return (0); 525130613Smlaier} 526130613Smlaier 527130613Smlaier#ifdef INET6 528126258Smlaiervoid 529126258Smlaierpf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af) 530126258Smlaier{ 531126258Smlaier switch (af) { 532126258Smlaier#ifdef INET 533126258Smlaier case AF_INET: 534126258Smlaier dst->addr32[0] = src->addr32[0]; 535126258Smlaier break; 536126258Smlaier#endif /* INET */ 537126258Smlaier case AF_INET6: 538126258Smlaier dst->addr32[0] = src->addr32[0]; 539126258Smlaier dst->addr32[1] = src->addr32[1]; 540126258Smlaier dst->addr32[2] = src->addr32[2]; 541126258Smlaier dst->addr32[3] = src->addr32[3]; 542126258Smlaier break; 543126258Smlaier } 544126258Smlaier} 545126258Smlaier#endif 546126258Smlaier 547126258Smlaierstruct pf_state * 548130613Smlaierpf_find_state_byid(struct pf_state *key) 549126258Smlaier{ 550130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 551130613Smlaier return (RB_FIND(pf_state_tree_id, &tree_id, key)); 552130613Smlaier} 553126258Smlaier 554130613Smlaierstruct pf_state * 555130613Smlaierpf_find_state_recurse(struct pfi_kif *kif, struct pf_state *key, u_int8_t tree) 556130613Smlaier{ 557130613Smlaier struct pf_state *s; 558130613Smlaier 559126258Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 560130613Smlaier 561130613Smlaier switch (tree) { 562130613Smlaier case PF_LAN_EXT: 563130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 564130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 565130613Smlaier &kif->pfik_lan_ext, key); 566130613Smlaier if (s != NULL) 567130613Smlaier return (s); 568130613Smlaier } 569126258Smlaier return (NULL); 570130613Smlaier case PF_EXT_GWY: 571130613Smlaier for (; kif != NULL; kif = kif->pfik_parent) { 572130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 573130613Smlaier &kif->pfik_ext_gwy, key); 574130613Smlaier if (s != NULL) 575130613Smlaier return (s); 576130613Smlaier } 577130613Smlaier return (NULL); 578130613Smlaier default: 579130613Smlaier panic("pf_find_state_recurse"); 580130613Smlaier } 581126258Smlaier} 582126258Smlaier 583130613Smlaierstruct pf_state * 584130613Smlaierpf_find_state_all(struct pf_state *key, u_int8_t tree, int *more) 585130613Smlaier{ 586130613Smlaier struct pf_state *s, *ss = NULL; 587130613Smlaier struct pfi_kif *kif; 588130613Smlaier 589130613Smlaier pf_status.fcounters[FCNT_STATE_SEARCH]++; 590130613Smlaier 591130613Smlaier switch (tree) { 592130613Smlaier case PF_LAN_EXT: 593130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 594130613Smlaier s = RB_FIND(pf_state_tree_lan_ext, 595130613Smlaier &kif->pfik_lan_ext, key); 596130613Smlaier if (s == NULL) 597130613Smlaier continue; 598130613Smlaier if (more == NULL) 599130613Smlaier return (s); 600130613Smlaier ss = s; 601130613Smlaier (*more)++; 602130613Smlaier } 603130613Smlaier return (ss); 604130613Smlaier case PF_EXT_GWY: 605130613Smlaier TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) { 606130613Smlaier s = RB_FIND(pf_state_tree_ext_gwy, 607130613Smlaier &kif->pfik_ext_gwy, key); 608130613Smlaier if (s == NULL) 609130613Smlaier continue; 610130613Smlaier if (more == NULL) 611130613Smlaier return (s); 612130613Smlaier ss = s; 613130613Smlaier (*more)++; 614130613Smlaier } 615130613Smlaier return (ss); 616130613Smlaier default: 617130613Smlaier panic("pf_find_state_all"); 618130613Smlaier } 619130613Smlaier} 620130613Smlaier 621126258Smlaierint 622130613Smlaierpf_insert_src_node(struct pf_src_node **sn, struct pf_rule *rule, 623130613Smlaier struct pf_addr *src, sa_family_t af) 624126258Smlaier{ 625130613Smlaier struct pf_src_node k; 626126258Smlaier 627130613Smlaier if (*sn == NULL) { 628130613Smlaier k.af = af; 629130613Smlaier PF_ACPY(&k.addr, src, af); 630130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 631130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 632130613Smlaier k.rule.ptr = rule; 633130613Smlaier else 634130613Smlaier k.rule.ptr = NULL; 635130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 636130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 637130613Smlaier } 638130613Smlaier if (*sn == NULL) { 639130613Smlaier if (!rule->max_src_nodes || 640130613Smlaier rule->src_nodes < rule->max_src_nodes) 641130613Smlaier (*sn) = pool_get(&pf_src_tree_pl, PR_NOWAIT); 642130613Smlaier if ((*sn) == NULL) 643130613Smlaier return (-1); 644130613Smlaier bzero(*sn, sizeof(struct pf_src_node)); 645130613Smlaier (*sn)->af = af; 646130613Smlaier if (rule->rule_flag & PFRULE_RULESRCTRACK || 647130613Smlaier rule->rpool.opts & PF_POOL_STICKYADDR) 648130613Smlaier (*sn)->rule.ptr = rule; 649130613Smlaier else 650130613Smlaier (*sn)->rule.ptr = NULL; 651130613Smlaier PF_ACPY(&(*sn)->addr, src, af); 652130613Smlaier if (RB_INSERT(pf_src_tree, 653130613Smlaier &tree_src_tracking, *sn) != NULL) { 654130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 655130613Smlaier printf("pf: src_tree insert failed: "); 656130613Smlaier pf_print_host(&(*sn)->addr, 0, af); 657130613Smlaier printf("\n"); 658130613Smlaier } 659130613Smlaier pool_put(&pf_src_tree_pl, *sn); 660130613Smlaier return (-1); 661130613Smlaier } 662130613Smlaier#ifdef __FreeBSD__ 663130613Smlaier (*sn)->creation = time_second; 664130613Smlaier#else 665130613Smlaier (*sn)->creation = time.tv_sec; 666130613Smlaier#endif 667130613Smlaier (*sn)->ruletype = rule->action; 668130613Smlaier if ((*sn)->rule.ptr != NULL) 669130613Smlaier (*sn)->rule.ptr->src_nodes++; 670130613Smlaier pf_status.scounters[SCNT_SRC_NODE_INSERT]++; 671130613Smlaier pf_status.src_nodes++; 672130613Smlaier } else { 673130613Smlaier if (rule->max_src_states && 674130613Smlaier (*sn)->states >= rule->max_src_states) 675130613Smlaier return (-1); 676130613Smlaier } 677130613Smlaier return (0); 678130613Smlaier} 679126258Smlaier 680130613Smlaierint 681130613Smlaierpf_insert_state(struct pfi_kif *kif, struct pf_state *state) 682130613Smlaier{ 683126258Smlaier /* Thou MUST NOT insert multiple duplicate keys */ 684130613Smlaier state->u.s.kif = kif; 685130613Smlaier if (RB_INSERT(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state)) { 686126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 687126258Smlaier printf("pf: state insert failed: tree_lan_ext"); 688126258Smlaier printf(" lan: "); 689126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 690126258Smlaier state->af); 691126258Smlaier printf(" gwy: "); 692126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 693126258Smlaier state->af); 694126258Smlaier printf(" ext: "); 695126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 696126258Smlaier state->af); 697130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 698130613Smlaier printf(" (from sync)"); 699126258Smlaier printf("\n"); 700126258Smlaier } 701126258Smlaier return (-1); 702126258Smlaier } 703126258Smlaier 704130613Smlaier if (RB_INSERT(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state)) { 705126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 706126258Smlaier printf("pf: state insert failed: tree_ext_gwy"); 707126258Smlaier printf(" lan: "); 708126258Smlaier pf_print_host(&state->lan.addr, state->lan.port, 709126258Smlaier state->af); 710126258Smlaier printf(" gwy: "); 711126258Smlaier pf_print_host(&state->gwy.addr, state->gwy.port, 712126258Smlaier state->af); 713126258Smlaier printf(" ext: "); 714126258Smlaier pf_print_host(&state->ext.addr, state->ext.port, 715126258Smlaier state->af); 716130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 717130613Smlaier printf(" (from sync)"); 718126258Smlaier printf("\n"); 719126258Smlaier } 720130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 721126258Smlaier return (-1); 722126258Smlaier } 723126258Smlaier 724130613Smlaier if (state->id == 0 && state->creatorid == 0) { 725130613Smlaier state->id = htobe64(pf_status.stateid++); 726130613Smlaier state->creatorid = pf_status.hostid; 727130613Smlaier } 728130613Smlaier if (RB_INSERT(pf_state_tree_id, &tree_id, state) != NULL) { 729130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 730130613Smlaier#ifdef __FreeBSD__ 731130613Smlaier printf("pf: state insert failed: " 732130613Smlaier "id: %016llx creatorid: %08x", 733130613Smlaier (long long)be64toh(state->id), 734130613Smlaier ntohl(state->creatorid)); 735130613Smlaier#else 736130613Smlaier printf("pf: state insert failed: " 737130613Smlaier "id: %016llx creatorid: %08x", 738130613Smlaier betoh64(state->id), ntohl(state->creatorid)); 739130613Smlaier#endif 740130613Smlaier if (state->sync_flags & PFSTATE_FROMSYNC) 741130613Smlaier printf(" (from sync)"); 742130613Smlaier printf("\n"); 743130613Smlaier } 744130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state); 745130613Smlaier RB_REMOVE(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state); 746130613Smlaier return (-1); 747130613Smlaier } 748130613Smlaier TAILQ_INSERT_HEAD(&state_updates, state, u.s.entry_updates); 749130613Smlaier 750126258Smlaier pf_status.fcounters[FCNT_STATE_INSERT]++; 751126258Smlaier pf_status.states++; 752130613Smlaier pfi_attach_state(kif); 753126258Smlaier#if NPFSYNC 754126258Smlaier pfsync_insert_state(state); 755126258Smlaier#endif 756126258Smlaier return (0); 757126258Smlaier} 758126258Smlaier 759126258Smlaiervoid 760126258Smlaierpf_purge_timeout(void *arg) 761126258Smlaier{ 762127145Smlaier#ifdef __FreeBSD__ 763126261Smlaier struct callout *to = arg; 764126261Smlaier#else 765126258Smlaier struct timeout *to = arg; 766126261Smlaier#endif 767126258Smlaier int s; 768126258Smlaier 769127145Smlaier#ifdef __FreeBSD__ 770126261Smlaier PF_LOCK(); 771126261Smlaier#endif 772126258Smlaier s = splsoftnet(); 773126258Smlaier pf_purge_expired_states(); 774126258Smlaier pf_purge_expired_fragments(); 775130613Smlaier pf_purge_expired_src_nodes(); 776126258Smlaier splx(s); 777127145Smlaier#ifdef __FreeBSD__ 778126261Smlaier PF_UNLOCK(); 779126261Smlaier#endif 780126258Smlaier 781127145Smlaier#ifdef __FreeBSD__ 782126261Smlaier callout_reset(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz, 783126261Smlaier pf_purge_timeout, to); 784126261Smlaier#else 785126258Smlaier timeout_add(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz); 786126261Smlaier#endif 787126258Smlaier} 788126258Smlaier 789126258Smlaieru_int32_t 790126258Smlaierpf_state_expires(const struct pf_state *state) 791126258Smlaier{ 792126258Smlaier u_int32_t timeout; 793126258Smlaier u_int32_t start; 794126258Smlaier u_int32_t end; 795126258Smlaier u_int32_t states; 796126258Smlaier 797126258Smlaier /* handle all PFTM_* > PFTM_MAX here */ 798126258Smlaier if (state->timeout == PFTM_PURGE) 799127145Smlaier#ifdef __FreeBSD__ 800126261Smlaier return (time_second); 801126261Smlaier#else 802126258Smlaier return (time.tv_sec); 803126261Smlaier#endif 804126258Smlaier if (state->timeout == PFTM_UNTIL_PACKET) 805126258Smlaier return (0); 806127145Smlaier#ifdef __FreeBSD__ 807126261Smlaier KASSERT((state->timeout < PFTM_MAX), 808126261Smlaier ("pf_state_expires: timeout > PFTM_MAX")); 809126261Smlaier#else 810126258Smlaier KASSERT(state->timeout < PFTM_MAX); 811126261Smlaier#endif 812126258Smlaier timeout = state->rule.ptr->timeout[state->timeout]; 813126258Smlaier if (!timeout) 814126258Smlaier timeout = pf_default_rule.timeout[state->timeout]; 815126258Smlaier start = state->rule.ptr->timeout[PFTM_ADAPTIVE_START]; 816126258Smlaier if (start) { 817126258Smlaier end = state->rule.ptr->timeout[PFTM_ADAPTIVE_END]; 818126258Smlaier states = state->rule.ptr->states; 819126258Smlaier } else { 820126258Smlaier start = pf_default_rule.timeout[PFTM_ADAPTIVE_START]; 821126258Smlaier end = pf_default_rule.timeout[PFTM_ADAPTIVE_END]; 822126258Smlaier states = pf_status.states; 823126258Smlaier } 824126258Smlaier if (end && states > start && start < end) { 825126258Smlaier if (states < end) 826126258Smlaier return (state->expire + timeout * (end - states) / 827126258Smlaier (end - start)); 828126258Smlaier else 829127145Smlaier#ifdef __FreeBSD__ 830126261Smlaier return (time_second); 831126261Smlaier#else 832126258Smlaier return (time.tv_sec); 833126261Smlaier#endif 834126258Smlaier } 835126258Smlaier return (state->expire + timeout); 836126258Smlaier} 837126258Smlaier 838126258Smlaiervoid 839130613Smlaierpf_purge_expired_src_nodes(void) 840126258Smlaier{ 841130613Smlaier struct pf_src_node *cur, *next; 842126258Smlaier 843130613Smlaier for (cur = RB_MIN(pf_src_tree, &tree_src_tracking); cur; cur = next) { 844130613Smlaier next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur); 845126258Smlaier 846127145Smlaier#ifdef __FreeBSD__ 847130613Smlaier if (cur->states <= 0 && cur->expire <= time_second) { 848126261Smlaier#else 849130613Smlaier if (cur->states <= 0 && cur->expire <= time.tv_sec) { 850126261Smlaier#endif 851130613Smlaier if (cur->rule.ptr != NULL) { 852130613Smlaier cur->rule.ptr->src_nodes--; 853130613Smlaier if (cur->rule.ptr->states <= 0 && 854130613Smlaier cur->rule.ptr->max_src_nodes <= 0) 855130613Smlaier pf_rm_rule(NULL, cur->rule.ptr); 856130613Smlaier } 857130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, cur); 858130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 859130613Smlaier pf_status.src_nodes--; 860130613Smlaier pool_put(&pf_src_tree_pl, cur); 861130613Smlaier } 862130613Smlaier } 863130613Smlaier} 864126258Smlaier 865130613Smlaiervoid 866130613Smlaierpf_src_tree_remove_state(struct pf_state *s) 867130613Smlaier{ 868130613Smlaier u_int32_t timeout; 869126258Smlaier 870130613Smlaier if (s->src_node != NULL) { 871130613Smlaier if (--s->src_node->states <= 0) { 872130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 873130613Smlaier if (!timeout) 874130613Smlaier timeout = 875130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 876127145Smlaier#ifdef __FreeBSD__ 877130613Smlaier s->src_node->expire = time_second + timeout; 878126261Smlaier#else 879130613Smlaier s->src_node->expire = time.tv_sec + timeout; 880126261Smlaier#endif 881130613Smlaier } 882130613Smlaier } 883130613Smlaier if (s->nat_src_node != s->src_node && s->nat_src_node != NULL) { 884130613Smlaier if (--s->nat_src_node->states <= 0) { 885130613Smlaier timeout = s->rule.ptr->timeout[PFTM_SRC_NODE]; 886130613Smlaier if (!timeout) 887130613Smlaier timeout = 888130613Smlaier pf_default_rule.timeout[PFTM_SRC_NODE]; 889130613Smlaier#ifdef __FreeBSD__ 890130613Smlaier s->nat_src_node->expire = time_second + timeout; 891130613Smlaier#else 892130613Smlaier s->nat_src_node->expire = time.tv_sec + timeout; 893130613Smlaier#endif 894130613Smlaier } 895130613Smlaier } 896130613Smlaier s->src_node = s->nat_src_node = NULL; 897130613Smlaier} 898126258Smlaier 899130613Smlaiervoid 900130613Smlaierpf_purge_expired_states(void) 901130613Smlaier{ 902130613Smlaier struct pf_state *cur, *next; 903130613Smlaier 904130613Smlaier for (cur = RB_MIN(pf_state_tree_id, &tree_id); 905130613Smlaier cur; cur = next) { 906130613Smlaier next = RB_NEXT(pf_state_tree_id, &tree_id, cur); 907130613Smlaier 908130613Smlaier#ifdef __FreeBSD__ 909130613Smlaier if (pf_state_expires(cur) <= time_second) { 910130613Smlaier#else 911130613Smlaier if (pf_state_expires(cur) <= time.tv_sec) { 912130613Smlaier#endif 913130613Smlaier if (cur->src.state == PF_TCPS_PROXY_DST) 914130613Smlaier pf_send_tcp(cur->rule.ptr, cur->af, 915130613Smlaier &cur->ext.addr, &cur->lan.addr, 916130613Smlaier cur->ext.port, cur->lan.port, 917130613Smlaier cur->src.seqhi, cur->src.seqlo + 1, 0, 918130613Smlaier TH_RST|TH_ACK, 0, 0); 919130613Smlaier RB_REMOVE(pf_state_tree_ext_gwy, 920130613Smlaier &cur->u.s.kif->pfik_ext_gwy, cur); 921130613Smlaier RB_REMOVE(pf_state_tree_lan_ext, 922130613Smlaier &cur->u.s.kif->pfik_lan_ext, cur); 923130613Smlaier RB_REMOVE(pf_state_tree_id, &tree_id, cur); 924126258Smlaier#if NPFSYNC 925130613Smlaier pfsync_delete_state(cur); 926126258Smlaier#endif 927130613Smlaier pf_src_tree_remove_state(cur); 928130613Smlaier if (--cur->rule.ptr->states <= 0 && 929130613Smlaier cur->rule.ptr->src_nodes <= 0) 930130613Smlaier pf_rm_rule(NULL, cur->rule.ptr); 931130613Smlaier if (cur->nat_rule.ptr != NULL) 932130613Smlaier if (--cur->nat_rule.ptr->states <= 0 && 933130613Smlaier cur->nat_rule.ptr->src_nodes <= 0) 934130613Smlaier pf_rm_rule(NULL, cur->nat_rule.ptr); 935130613Smlaier if (cur->anchor.ptr != NULL) 936130613Smlaier if (--cur->anchor.ptr->states <= 0) 937130613Smlaier pf_rm_rule(NULL, cur->anchor.ptr); 938130613Smlaier pf_normalize_tcp_cleanup(cur); 939130613Smlaier pfi_detach_state(cur->u.s.kif); 940130613Smlaier TAILQ_REMOVE(&state_updates, cur, u.s.entry_updates); 941130613Smlaier pool_put(&pf_state_pl, cur); 942126258Smlaier pf_status.fcounters[FCNT_STATE_REMOVALS]++; 943126258Smlaier pf_status.states--; 944126258Smlaier } 945126258Smlaier } 946126258Smlaier} 947126258Smlaier 948126258Smlaierint 949126258Smlaierpf_tbladdr_setup(struct pf_ruleset *rs, struct pf_addr_wrap *aw) 950126258Smlaier{ 951126258Smlaier if (aw->type != PF_ADDR_TABLE) 952126258Smlaier return (0); 953126258Smlaier if ((aw->p.tbl = pfr_attach_table(rs, aw->v.tblname)) == NULL) 954126258Smlaier return (1); 955126258Smlaier return (0); 956126258Smlaier} 957126258Smlaier 958126258Smlaiervoid 959126258Smlaierpf_tbladdr_remove(struct pf_addr_wrap *aw) 960126258Smlaier{ 961126258Smlaier if (aw->type != PF_ADDR_TABLE || aw->p.tbl == NULL) 962126258Smlaier return; 963126258Smlaier pfr_detach_table(aw->p.tbl); 964126258Smlaier aw->p.tbl = NULL; 965126258Smlaier} 966126258Smlaier 967126258Smlaiervoid 968126258Smlaierpf_tbladdr_copyout(struct pf_addr_wrap *aw) 969126258Smlaier{ 970126258Smlaier struct pfr_ktable *kt = aw->p.tbl; 971126258Smlaier 972126258Smlaier if (aw->type != PF_ADDR_TABLE || kt == NULL) 973126258Smlaier return; 974126258Smlaier if (!(kt->pfrkt_flags & PFR_TFLAG_ACTIVE) && kt->pfrkt_root != NULL) 975126258Smlaier kt = kt->pfrkt_root; 976126258Smlaier aw->p.tbl = NULL; 977126258Smlaier aw->p.tblcnt = (kt->pfrkt_flags & PFR_TFLAG_ACTIVE) ? 978126258Smlaier kt->pfrkt_cnt : -1; 979126258Smlaier} 980126258Smlaier 981126258Smlaiervoid 982126258Smlaierpf_print_host(struct pf_addr *addr, u_int16_t p, sa_family_t af) 983126258Smlaier{ 984126258Smlaier switch (af) { 985126258Smlaier#ifdef INET 986126258Smlaier case AF_INET: { 987126258Smlaier u_int32_t a = ntohl(addr->addr32[0]); 988126258Smlaier printf("%u.%u.%u.%u", (a>>24)&255, (a>>16)&255, 989126258Smlaier (a>>8)&255, a&255); 990126258Smlaier if (p) { 991126258Smlaier p = ntohs(p); 992126258Smlaier printf(":%u", p); 993126258Smlaier } 994126258Smlaier break; 995126258Smlaier } 996126258Smlaier#endif /* INET */ 997126258Smlaier#ifdef INET6 998126258Smlaier case AF_INET6: { 999126258Smlaier u_int16_t b; 1000126258Smlaier u_int8_t i, curstart = 255, curend = 0, 1001126258Smlaier maxstart = 0, maxend = 0; 1002126258Smlaier for (i = 0; i < 8; i++) { 1003126258Smlaier if (!addr->addr16[i]) { 1004126258Smlaier if (curstart == 255) 1005126258Smlaier curstart = i; 1006126258Smlaier else 1007126258Smlaier curend = i; 1008126258Smlaier } else { 1009126258Smlaier if (curstart) { 1010126258Smlaier if ((curend - curstart) > 1011126258Smlaier (maxend - maxstart)) { 1012126258Smlaier maxstart = curstart; 1013126258Smlaier maxend = curend; 1014126258Smlaier curstart = 255; 1015126258Smlaier } 1016126258Smlaier } 1017126258Smlaier } 1018126258Smlaier } 1019126258Smlaier for (i = 0; i < 8; i++) { 1020126258Smlaier if (i >= maxstart && i <= maxend) { 1021126258Smlaier if (maxend != 7) { 1022126258Smlaier if (i == maxstart) 1023126258Smlaier printf(":"); 1024126258Smlaier } else { 1025126258Smlaier if (i == maxend) 1026126258Smlaier printf(":"); 1027126258Smlaier } 1028126258Smlaier } else { 1029126258Smlaier b = ntohs(addr->addr16[i]); 1030126258Smlaier printf("%x", b); 1031126258Smlaier if (i < 7) 1032126258Smlaier printf(":"); 1033126258Smlaier } 1034126258Smlaier } 1035126258Smlaier if (p) { 1036126258Smlaier p = ntohs(p); 1037126258Smlaier printf("[%u]", p); 1038126258Smlaier } 1039126258Smlaier break; 1040126258Smlaier } 1041126258Smlaier#endif /* INET6 */ 1042126258Smlaier } 1043126258Smlaier} 1044126258Smlaier 1045126258Smlaiervoid 1046126258Smlaierpf_print_state(struct pf_state *s) 1047126258Smlaier{ 1048126258Smlaier switch (s->proto) { 1049126258Smlaier case IPPROTO_TCP: 1050126258Smlaier printf("TCP "); 1051126258Smlaier break; 1052126258Smlaier case IPPROTO_UDP: 1053126258Smlaier printf("UDP "); 1054126258Smlaier break; 1055126258Smlaier case IPPROTO_ICMP: 1056126258Smlaier printf("ICMP "); 1057126258Smlaier break; 1058126258Smlaier case IPPROTO_ICMPV6: 1059126258Smlaier printf("ICMPV6 "); 1060126258Smlaier break; 1061126258Smlaier default: 1062126258Smlaier printf("%u ", s->proto); 1063126258Smlaier break; 1064126258Smlaier } 1065126258Smlaier pf_print_host(&s->lan.addr, s->lan.port, s->af); 1066126258Smlaier printf(" "); 1067126258Smlaier pf_print_host(&s->gwy.addr, s->gwy.port, s->af); 1068126258Smlaier printf(" "); 1069126258Smlaier pf_print_host(&s->ext.addr, s->ext.port, s->af); 1070126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->src.seqlo, 1071126258Smlaier s->src.seqhi, s->src.max_win, s->src.seqdiff); 1072126258Smlaier if (s->src.wscale && s->dst.wscale) 1073126258Smlaier printf(" wscale=%u", s->src.wscale & PF_WSCALE_MASK); 1074126258Smlaier printf("]"); 1075126258Smlaier printf(" [lo=%u high=%u win=%u modulator=%u", s->dst.seqlo, 1076126258Smlaier s->dst.seqhi, s->dst.max_win, s->dst.seqdiff); 1077126258Smlaier if (s->src.wscale && s->dst.wscale) 1078126258Smlaier printf(" wscale=%u", s->dst.wscale & PF_WSCALE_MASK); 1079126258Smlaier printf("]"); 1080126258Smlaier printf(" %u:%u", s->src.state, s->dst.state); 1081126258Smlaier} 1082126258Smlaier 1083126258Smlaiervoid 1084126258Smlaierpf_print_flags(u_int8_t f) 1085126258Smlaier{ 1086126258Smlaier if (f) 1087126258Smlaier printf(" "); 1088126258Smlaier if (f & TH_FIN) 1089126258Smlaier printf("F"); 1090126258Smlaier if (f & TH_SYN) 1091126258Smlaier printf("S"); 1092126258Smlaier if (f & TH_RST) 1093126258Smlaier printf("R"); 1094126258Smlaier if (f & TH_PUSH) 1095126258Smlaier printf("P"); 1096126258Smlaier if (f & TH_ACK) 1097126258Smlaier printf("A"); 1098126258Smlaier if (f & TH_URG) 1099126258Smlaier printf("U"); 1100126258Smlaier if (f & TH_ECE) 1101126258Smlaier printf("E"); 1102126258Smlaier if (f & TH_CWR) 1103126258Smlaier printf("W"); 1104126258Smlaier} 1105126258Smlaier 1106126258Smlaier#define PF_SET_SKIP_STEPS(i) \ 1107126258Smlaier do { \ 1108126258Smlaier while (head[i] != cur) { \ 1109126258Smlaier head[i]->skip[i].ptr = cur; \ 1110126258Smlaier head[i] = TAILQ_NEXT(head[i], entries); \ 1111126258Smlaier } \ 1112126258Smlaier } while (0) 1113126258Smlaier 1114126258Smlaiervoid 1115126258Smlaierpf_calc_skip_steps(struct pf_rulequeue *rules) 1116126258Smlaier{ 1117126258Smlaier struct pf_rule *cur, *prev, *head[PF_SKIP_COUNT]; 1118126258Smlaier int i; 1119126258Smlaier 1120126258Smlaier cur = TAILQ_FIRST(rules); 1121126258Smlaier prev = cur; 1122126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1123126258Smlaier head[i] = cur; 1124126258Smlaier while (cur != NULL) { 1125126258Smlaier 1126130613Smlaier if (cur->kif != prev->kif || cur->ifnot != prev->ifnot) 1127126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_IFP); 1128126258Smlaier if (cur->direction != prev->direction) 1129126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DIR); 1130126258Smlaier if (cur->af != prev->af) 1131126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_AF); 1132126258Smlaier if (cur->proto != prev->proto) 1133126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_PROTO); 1134126258Smlaier if (cur->src.not != prev->src.not || 1135126258Smlaier pf_addr_wrap_neq(&cur->src.addr, &prev->src.addr)) 1136126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_ADDR); 1137126258Smlaier if (cur->src.port[0] != prev->src.port[0] || 1138126258Smlaier cur->src.port[1] != prev->src.port[1] || 1139126258Smlaier cur->src.port_op != prev->src.port_op) 1140126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_SRC_PORT); 1141126258Smlaier if (cur->dst.not != prev->dst.not || 1142126258Smlaier pf_addr_wrap_neq(&cur->dst.addr, &prev->dst.addr)) 1143126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_ADDR); 1144126258Smlaier if (cur->dst.port[0] != prev->dst.port[0] || 1145126258Smlaier cur->dst.port[1] != prev->dst.port[1] || 1146126258Smlaier cur->dst.port_op != prev->dst.port_op) 1147126258Smlaier PF_SET_SKIP_STEPS(PF_SKIP_DST_PORT); 1148126258Smlaier 1149126258Smlaier prev = cur; 1150126258Smlaier cur = TAILQ_NEXT(cur, entries); 1151126258Smlaier } 1152126258Smlaier for (i = 0; i < PF_SKIP_COUNT; ++i) 1153126258Smlaier PF_SET_SKIP_STEPS(i); 1154126258Smlaier} 1155126258Smlaier 1156126258Smlaierint 1157126258Smlaierpf_addr_wrap_neq(struct pf_addr_wrap *aw1, struct pf_addr_wrap *aw2) 1158126258Smlaier{ 1159126258Smlaier if (aw1->type != aw2->type) 1160126258Smlaier return (1); 1161126258Smlaier switch (aw1->type) { 1162126258Smlaier case PF_ADDR_ADDRMASK: 1163126258Smlaier if (PF_ANEQ(&aw1->v.a.addr, &aw2->v.a.addr, 0)) 1164126258Smlaier return (1); 1165126258Smlaier if (PF_ANEQ(&aw1->v.a.mask, &aw2->v.a.mask, 0)) 1166126258Smlaier return (1); 1167126258Smlaier return (0); 1168126258Smlaier case PF_ADDR_DYNIFTL: 1169130613Smlaier return (aw1->p.dyn->pfid_kt != aw2->p.dyn->pfid_kt); 1170126258Smlaier case PF_ADDR_NOROUTE: 1171126258Smlaier return (0); 1172126258Smlaier case PF_ADDR_TABLE: 1173126258Smlaier return (aw1->p.tbl != aw2->p.tbl); 1174126258Smlaier default: 1175126258Smlaier printf("invalid address type: %d\n", aw1->type); 1176126258Smlaier return (1); 1177126258Smlaier } 1178126258Smlaier} 1179126258Smlaier 1180126258Smlaiervoid 1181126258Smlaierpf_update_anchor_rules() 1182126258Smlaier{ 1183126258Smlaier struct pf_rule *rule; 1184126258Smlaier int i; 1185126258Smlaier 1186126258Smlaier for (i = 0; i < PF_RULESET_MAX; ++i) 1187126258Smlaier TAILQ_FOREACH(rule, pf_main_ruleset.rules[i].active.ptr, 1188126258Smlaier entries) 1189126258Smlaier if (rule->anchorname[0]) 1190126258Smlaier rule->anchor = pf_find_anchor(rule->anchorname); 1191126258Smlaier else 1192126258Smlaier rule->anchor = NULL; 1193126258Smlaier} 1194126258Smlaier 1195126258Smlaieru_int16_t 1196126258Smlaierpf_cksum_fixup(u_int16_t cksum, u_int16_t old, u_int16_t new, u_int8_t udp) 1197126258Smlaier{ 1198126258Smlaier u_int32_t l; 1199126258Smlaier 1200126258Smlaier if (udp && !cksum) 1201126258Smlaier return (0x0000); 1202126258Smlaier l = cksum + old - new; 1203126258Smlaier l = (l >> 16) + (l & 65535); 1204126258Smlaier l = l & 65535; 1205126258Smlaier if (udp && !l) 1206126258Smlaier return (0xFFFF); 1207126258Smlaier return (l); 1208126258Smlaier} 1209126258Smlaier 1210126258Smlaiervoid 1211126258Smlaierpf_change_ap(struct pf_addr *a, u_int16_t *p, u_int16_t *ic, u_int16_t *pc, 1212126258Smlaier struct pf_addr *an, u_int16_t pn, u_int8_t u, sa_family_t af) 1213126258Smlaier{ 1214126258Smlaier struct pf_addr ao; 1215126258Smlaier u_int16_t po = *p; 1216126258Smlaier 1217126258Smlaier PF_ACPY(&ao, a, af); 1218126258Smlaier PF_ACPY(a, an, af); 1219126258Smlaier 1220126258Smlaier *p = pn; 1221126258Smlaier 1222126258Smlaier switch (af) { 1223126258Smlaier#ifdef INET 1224126258Smlaier case AF_INET: 1225126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1226126258Smlaier ao.addr16[0], an->addr16[0], 0), 1227126258Smlaier ao.addr16[1], an->addr16[1], 0); 1228126258Smlaier *p = pn; 1229126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1230126258Smlaier ao.addr16[0], an->addr16[0], u), 1231126258Smlaier ao.addr16[1], an->addr16[1], u), 1232126258Smlaier po, pn, u); 1233126258Smlaier break; 1234126258Smlaier#endif /* INET */ 1235126258Smlaier#ifdef INET6 1236126258Smlaier case AF_INET6: 1237126258Smlaier *pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1238126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1239126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc, 1240126258Smlaier ao.addr16[0], an->addr16[0], u), 1241126258Smlaier ao.addr16[1], an->addr16[1], u), 1242126258Smlaier ao.addr16[2], an->addr16[2], u), 1243126258Smlaier ao.addr16[3], an->addr16[3], u), 1244126258Smlaier ao.addr16[4], an->addr16[4], u), 1245126258Smlaier ao.addr16[5], an->addr16[5], u), 1246126258Smlaier ao.addr16[6], an->addr16[6], u), 1247126258Smlaier ao.addr16[7], an->addr16[7], u), 1248126258Smlaier po, pn, u); 1249126258Smlaier break; 1250126258Smlaier#endif /* INET6 */ 1251126258Smlaier } 1252126258Smlaier} 1253126258Smlaier 1254126258Smlaier 1255126258Smlaier/* Changes a u_int32_t. Uses a void * so there are no align restrictions */ 1256126258Smlaiervoid 1257126258Smlaierpf_change_a(void *a, u_int16_t *c, u_int32_t an, u_int8_t u) 1258126258Smlaier{ 1259126258Smlaier u_int32_t ao; 1260126258Smlaier 1261126258Smlaier memcpy(&ao, a, sizeof(ao)); 1262126258Smlaier memcpy(a, &an, sizeof(u_int32_t)); 1263126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(*c, ao / 65536, an / 65536, u), 1264126258Smlaier ao % 65536, an % 65536, u); 1265126258Smlaier} 1266126258Smlaier 1267126258Smlaier#ifdef INET6 1268126258Smlaiervoid 1269126258Smlaierpf_change_a6(struct pf_addr *a, u_int16_t *c, struct pf_addr *an, u_int8_t u) 1270126258Smlaier{ 1271126258Smlaier struct pf_addr ao; 1272126258Smlaier 1273126258Smlaier PF_ACPY(&ao, a, AF_INET6); 1274126258Smlaier PF_ACPY(a, an, AF_INET6); 1275126258Smlaier 1276126258Smlaier *c = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1277126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1278126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*c, 1279126258Smlaier ao.addr16[0], an->addr16[0], u), 1280126258Smlaier ao.addr16[1], an->addr16[1], u), 1281126258Smlaier ao.addr16[2], an->addr16[2], u), 1282126258Smlaier ao.addr16[3], an->addr16[3], u), 1283126258Smlaier ao.addr16[4], an->addr16[4], u), 1284126258Smlaier ao.addr16[5], an->addr16[5], u), 1285126258Smlaier ao.addr16[6], an->addr16[6], u), 1286126258Smlaier ao.addr16[7], an->addr16[7], u); 1287126258Smlaier} 1288126258Smlaier#endif /* INET6 */ 1289126258Smlaier 1290126258Smlaiervoid 1291126258Smlaierpf_change_icmp(struct pf_addr *ia, u_int16_t *ip, struct pf_addr *oa, 1292126258Smlaier struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c, 1293126258Smlaier u_int16_t *ic, u_int16_t *hc, u_int8_t u, sa_family_t af) 1294126258Smlaier{ 1295126258Smlaier struct pf_addr oia, ooa; 1296126258Smlaier 1297126258Smlaier PF_ACPY(&oia, ia, af); 1298126258Smlaier PF_ACPY(&ooa, oa, af); 1299126258Smlaier 1300126258Smlaier /* Change inner protocol port, fix inner protocol checksum. */ 1301126258Smlaier if (ip != NULL) { 1302126258Smlaier u_int16_t oip = *ip; 1303127629Smlaier u_int32_t opc = 0; /* make the compiler happy */ 1304126258Smlaier 1305126258Smlaier if (pc != NULL) 1306126258Smlaier opc = *pc; 1307126258Smlaier *ip = np; 1308126258Smlaier if (pc != NULL) 1309126258Smlaier *pc = pf_cksum_fixup(*pc, oip, *ip, u); 1310126258Smlaier *ic = pf_cksum_fixup(*ic, oip, *ip, 0); 1311126258Smlaier if (pc != NULL) 1312126258Smlaier *ic = pf_cksum_fixup(*ic, opc, *pc, 0); 1313126258Smlaier } 1314126258Smlaier /* Change inner ip address, fix inner ip and icmp checksums. */ 1315126258Smlaier PF_ACPY(ia, na, af); 1316126258Smlaier switch (af) { 1317126258Smlaier#ifdef INET 1318126258Smlaier case AF_INET: { 1319126258Smlaier u_int32_t oh2c = *h2c; 1320126258Smlaier 1321126258Smlaier *h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c, 1322126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1323126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1324126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(*ic, 1325126258Smlaier oia.addr16[0], ia->addr16[0], 0), 1326126258Smlaier oia.addr16[1], ia->addr16[1], 0); 1327126258Smlaier *ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0); 1328126258Smlaier break; 1329126258Smlaier } 1330126258Smlaier#endif /* INET */ 1331126258Smlaier#ifdef INET6 1332126258Smlaier case AF_INET6: 1333126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1334126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1335126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1336126258Smlaier oia.addr16[0], ia->addr16[0], u), 1337126258Smlaier oia.addr16[1], ia->addr16[1], u), 1338126258Smlaier oia.addr16[2], ia->addr16[2], u), 1339126258Smlaier oia.addr16[3], ia->addr16[3], u), 1340126258Smlaier oia.addr16[4], ia->addr16[4], u), 1341126258Smlaier oia.addr16[5], ia->addr16[5], u), 1342126258Smlaier oia.addr16[6], ia->addr16[6], u), 1343126258Smlaier oia.addr16[7], ia->addr16[7], u); 1344126258Smlaier break; 1345126258Smlaier#endif /* INET6 */ 1346126258Smlaier } 1347126258Smlaier /* Change outer ip address, fix outer ip or icmpv6 checksum. */ 1348126258Smlaier PF_ACPY(oa, na, af); 1349126258Smlaier switch (af) { 1350126258Smlaier#ifdef INET 1351126258Smlaier case AF_INET: 1352126258Smlaier *hc = pf_cksum_fixup(pf_cksum_fixup(*hc, 1353126258Smlaier ooa.addr16[0], oa->addr16[0], 0), 1354126258Smlaier ooa.addr16[1], oa->addr16[1], 0); 1355126258Smlaier break; 1356126258Smlaier#endif /* INET */ 1357126258Smlaier#ifdef INET6 1358126258Smlaier case AF_INET6: 1359126258Smlaier *ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1360126258Smlaier pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup( 1361126258Smlaier pf_cksum_fixup(pf_cksum_fixup(*ic, 1362126258Smlaier ooa.addr16[0], oa->addr16[0], u), 1363126258Smlaier ooa.addr16[1], oa->addr16[1], u), 1364126258Smlaier ooa.addr16[2], oa->addr16[2], u), 1365126258Smlaier ooa.addr16[3], oa->addr16[3], u), 1366126258Smlaier ooa.addr16[4], oa->addr16[4], u), 1367126258Smlaier ooa.addr16[5], oa->addr16[5], u), 1368126258Smlaier ooa.addr16[6], oa->addr16[6], u), 1369126258Smlaier ooa.addr16[7], oa->addr16[7], u); 1370126258Smlaier break; 1371126258Smlaier#endif /* INET6 */ 1372126258Smlaier } 1373126258Smlaier} 1374126258Smlaier 1375126258Smlaiervoid 1376126258Smlaierpf_send_tcp(const struct pf_rule *r, sa_family_t af, 1377126258Smlaier const struct pf_addr *saddr, const struct pf_addr *daddr, 1378126258Smlaier u_int16_t sport, u_int16_t dport, u_int32_t seq, u_int32_t ack, 1379126258Smlaier u_int8_t flags, u_int16_t win, u_int16_t mss, u_int8_t ttl) 1380126258Smlaier{ 1381126258Smlaier struct mbuf *m; 1382132280Smlaier#ifdef ALTQ 1383126258Smlaier struct m_tag *mtag; 1384132280Smlaier#endif 1385127629Smlaier int len = 0, tlen; /* make the compiler happy */ 1386126258Smlaier#ifdef INET 1387127629Smlaier struct ip *h = NULL; /* make the compiler happy */ 1388126258Smlaier#endif /* INET */ 1389126258Smlaier#ifdef INET6 1390127629Smlaier struct ip6_hdr *h6 = NULL; /* make the compiler happy */ 1391126258Smlaier#endif /* INET6 */ 1392127629Smlaier struct tcphdr *th = NULL; /* make the compiler happy */ 1393127145Smlaier#ifdef __FreeBSD__ 1394126261Smlaier struct ip *ip; 1395126261Smlaier#endif 1396126258Smlaier char *opt; 1397126258Smlaier 1398126258Smlaier /* maximum segment size tcp option */ 1399126258Smlaier tlen = sizeof(struct tcphdr); 1400126258Smlaier if (mss) 1401126258Smlaier tlen += 4; 1402126258Smlaier 1403126258Smlaier switch (af) { 1404126258Smlaier#ifdef INET 1405126258Smlaier case AF_INET: 1406126258Smlaier len = sizeof(struct ip) + tlen; 1407126258Smlaier break; 1408126258Smlaier#endif /* INET */ 1409126258Smlaier#ifdef INET6 1410126258Smlaier case AF_INET6: 1411126258Smlaier len = sizeof(struct ip6_hdr) + tlen; 1412126258Smlaier break; 1413126258Smlaier#endif /* INET6 */ 1414126258Smlaier } 1415126258Smlaier 1416126258Smlaier /* create outgoing mbuf */ 1417132280Smlaier#ifdef __FreeBSD__ 1418132280Smlaier m = m_gethdr(M_DONTWAIT, MT_HEADER); 1419132280Smlaier if (m == NULL) 1420132280Smlaier return; 1421132280Smlaier m->m_flags |= M_SKIP_FIREWALL; 1422132280Smlaier#else 1423126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1424126258Smlaier if (mtag == NULL) 1425126258Smlaier return; 1426126258Smlaier m = m_gethdr(M_DONTWAIT, MT_HEADER); 1427126258Smlaier if (m == NULL) { 1428126258Smlaier m_tag_free(mtag); 1429126258Smlaier return; 1430126258Smlaier } 1431126258Smlaier m_tag_prepend(m, mtag); 1432132280Smlaier#endif 1433126258Smlaier#ifdef ALTQ 1434126258Smlaier if (r != NULL && r->qid) { 1435126258Smlaier struct altq_tag *atag; 1436126258Smlaier 1437126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1438126258Smlaier if (mtag != NULL) { 1439126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1440126258Smlaier atag->qid = r->qid; 1441126258Smlaier /* add hints for ecn */ 1442126258Smlaier atag->af = af; 1443126258Smlaier atag->hdr = mtod(m, struct ip *); 1444126258Smlaier m_tag_prepend(m, mtag); 1445126258Smlaier } 1446126258Smlaier } 1447126258Smlaier#endif 1448126258Smlaier m->m_data += max_linkhdr; 1449126258Smlaier m->m_pkthdr.len = m->m_len = len; 1450126258Smlaier m->m_pkthdr.rcvif = NULL; 1451126258Smlaier bzero(m->m_data, len); 1452126258Smlaier switch (af) { 1453126258Smlaier#ifdef INET 1454126258Smlaier case AF_INET: 1455126258Smlaier h = mtod(m, struct ip *); 1456126258Smlaier 1457126258Smlaier /* IP header fields included in the TCP checksum */ 1458126258Smlaier h->ip_p = IPPROTO_TCP; 1459126258Smlaier h->ip_len = htons(tlen); 1460126258Smlaier h->ip_src.s_addr = saddr->v4.s_addr; 1461126258Smlaier h->ip_dst.s_addr = daddr->v4.s_addr; 1462126258Smlaier 1463126258Smlaier th = (struct tcphdr *)((caddr_t)h + sizeof(struct ip)); 1464126258Smlaier break; 1465126258Smlaier#endif /* INET */ 1466126258Smlaier#ifdef INET6 1467126258Smlaier case AF_INET6: 1468126258Smlaier h6 = mtod(m, struct ip6_hdr *); 1469126258Smlaier 1470126258Smlaier /* IP header fields included in the TCP checksum */ 1471126258Smlaier h6->ip6_nxt = IPPROTO_TCP; 1472126258Smlaier h6->ip6_plen = htons(tlen); 1473126258Smlaier memcpy(&h6->ip6_src, &saddr->v6, sizeof(struct in6_addr)); 1474126258Smlaier memcpy(&h6->ip6_dst, &daddr->v6, sizeof(struct in6_addr)); 1475126258Smlaier 1476126258Smlaier th = (struct tcphdr *)((caddr_t)h6 + sizeof(struct ip6_hdr)); 1477126258Smlaier break; 1478126258Smlaier#endif /* INET6 */ 1479126258Smlaier } 1480126258Smlaier 1481126258Smlaier /* TCP header */ 1482126258Smlaier th->th_sport = sport; 1483126258Smlaier th->th_dport = dport; 1484126258Smlaier th->th_seq = htonl(seq); 1485126258Smlaier th->th_ack = htonl(ack); 1486126258Smlaier th->th_off = tlen >> 2; 1487126258Smlaier th->th_flags = flags; 1488126258Smlaier th->th_win = htons(win); 1489126258Smlaier 1490126258Smlaier if (mss) { 1491126258Smlaier opt = (char *)(th + 1); 1492126258Smlaier opt[0] = TCPOPT_MAXSEG; 1493126258Smlaier opt[1] = 4; 1494126258Smlaier HTONS(mss); 1495126258Smlaier bcopy((caddr_t)&mss, (caddr_t)(opt + 2), 2); 1496126258Smlaier } 1497126258Smlaier 1498126258Smlaier switch (af) { 1499126258Smlaier#ifdef INET 1500126258Smlaier case AF_INET: 1501126258Smlaier /* TCP checksum */ 1502126258Smlaier th->th_sum = in_cksum(m, len); 1503126258Smlaier 1504126258Smlaier /* Finish the IP header */ 1505126258Smlaier h->ip_v = 4; 1506126258Smlaier h->ip_hl = sizeof(*h) >> 2; 1507126258Smlaier h->ip_tos = IPTOS_LOWDELAY; 1508127145Smlaier#ifdef __FreeBSD__ 1509130613Smlaier h->ip_off = path_mtu_discovery ? IP_DF : 0; 1510130613Smlaier h->ip_len = len; 1511126261Smlaier#else 1512126261Smlaier h->ip_off = htons(ip_mtudisc ? IP_DF : 0); 1513130613Smlaier h->ip_len = htons(len); 1514126261Smlaier#endif 1515126258Smlaier h->ip_ttl = ttl ? ttl : ip_defttl; 1516126258Smlaier h->ip_sum = 0; 1517127145Smlaier#ifdef __FreeBSD__ 1518126261Smlaier ip = mtod(m, struct ip *); 1519126261Smlaier PF_UNLOCK(); 1520126258Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, (void *)NULL, 1521126261Smlaier (void *)NULL); 1522126261Smlaier PF_LOCK(); 1523126261Smlaier#else /* ! __FreeBSD__ */ 1524126261Smlaier ip_output(m, (void *)NULL, (void *)NULL, 0, (void *)NULL, 1525126258Smlaier (void *)NULL); 1526126261Smlaier#endif 1527126258Smlaier break; 1528126258Smlaier#endif /* INET */ 1529126258Smlaier#ifdef INET6 1530126258Smlaier case AF_INET6: 1531126258Smlaier /* TCP checksum */ 1532126258Smlaier th->th_sum = in6_cksum(m, IPPROTO_TCP, 1533126258Smlaier sizeof(struct ip6_hdr), tlen); 1534126258Smlaier 1535126258Smlaier h6->ip6_vfc |= IPV6_VERSION; 1536126258Smlaier h6->ip6_hlim = IPV6_DEFHLIM; 1537126258Smlaier 1538127145Smlaier#ifdef __FreeBSD__ 1539126261Smlaier PF_UNLOCK(); 1540126261Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL); 1541126261Smlaier PF_LOCK(); 1542126261Smlaier#else 1543126258Smlaier ip6_output(m, NULL, NULL, 0, NULL, NULL); 1544126261Smlaier#endif 1545126258Smlaier break; 1546126258Smlaier#endif /* INET6 */ 1547126258Smlaier } 1548126258Smlaier} 1549126258Smlaier 1550126258Smlaiervoid 1551126258Smlaierpf_send_icmp(struct mbuf *m, u_int8_t type, u_int8_t code, sa_family_t af, 1552126258Smlaier struct pf_rule *r) 1553126258Smlaier{ 1554132280Smlaier#ifdef ALTQ 1555126258Smlaier struct m_tag *mtag; 1556132280Smlaier#endif 1557126258Smlaier struct mbuf *m0; 1558127145Smlaier#ifdef __FreeBSD__ 1559126261Smlaier struct ip *ip; 1560126261Smlaier#endif 1561126258Smlaier 1562132280Smlaier#ifdef __FreeBSD__ 1563132280Smlaier m0 = m_copypacket(m, M_DONTWAIT); 1564132280Smlaier if (m0 == NULL) 1565132280Smlaier return; 1566132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 1567132280Smlaier#else 1568126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 1569126258Smlaier if (mtag == NULL) 1570126258Smlaier return; 1571126258Smlaier m0 = m_copy(m, 0, M_COPYALL); 1572126258Smlaier if (m0 == NULL) { 1573126258Smlaier m_tag_free(mtag); 1574126258Smlaier return; 1575126258Smlaier } 1576126258Smlaier m_tag_prepend(m0, mtag); 1577132280Smlaier#endif 1578126258Smlaier 1579126258Smlaier#ifdef ALTQ 1580126258Smlaier if (r->qid) { 1581126258Smlaier struct altq_tag *atag; 1582126258Smlaier 1583126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 1584126258Smlaier if (mtag != NULL) { 1585126258Smlaier atag = (struct altq_tag *)(mtag + 1); 1586126258Smlaier atag->qid = r->qid; 1587126258Smlaier /* add hints for ecn */ 1588126258Smlaier atag->af = af; 1589126258Smlaier atag->hdr = mtod(m0, struct ip *); 1590126258Smlaier m_tag_prepend(m0, mtag); 1591126258Smlaier } 1592126258Smlaier } 1593126258Smlaier#endif 1594126258Smlaier 1595126258Smlaier switch (af) { 1596126258Smlaier#ifdef INET 1597126258Smlaier case AF_INET: 1598127145Smlaier#ifdef __FreeBSD__ 1599126261Smlaier /* icmp_error() expects host byte ordering */ 1600126261Smlaier ip = mtod(m0, struct ip *); 1601126261Smlaier NTOHS(ip->ip_len); 1602126261Smlaier NTOHS(ip->ip_off); 1603126261Smlaier PF_UNLOCK(); 1604126261Smlaier#endif 1605130613Smlaier icmp_error(m0, type, code, 0, (void *)NULL); 1606127145Smlaier#ifdef __FreeBSD__ 1607126261Smlaier PF_LOCK(); 1608126261Smlaier#endif 1609126258Smlaier break; 1610126258Smlaier#endif /* INET */ 1611126258Smlaier#ifdef INET6 1612126258Smlaier case AF_INET6: 1613127145Smlaier#ifdef __FreeBSD__ 1614126261Smlaier PF_UNLOCK(); 1615126261Smlaier#endif 1616126258Smlaier icmp6_error(m0, type, code, 0); 1617127145Smlaier#ifdef __FreeBSD__ 1618126261Smlaier PF_LOCK(); 1619126261Smlaier#endif 1620126258Smlaier break; 1621126258Smlaier#endif /* INET6 */ 1622126258Smlaier } 1623126258Smlaier} 1624126258Smlaier 1625126258Smlaier/* 1626126258Smlaier * Return 1 if the addresses a and b match (with mask m), otherwise return 0. 1627126258Smlaier * If n is 0, they match if they are equal. If n is != 0, they match if they 1628126258Smlaier * are different. 1629126258Smlaier */ 1630126258Smlaierint 1631126258Smlaierpf_match_addr(u_int8_t n, struct pf_addr *a, struct pf_addr *m, 1632126258Smlaier struct pf_addr *b, sa_family_t af) 1633126258Smlaier{ 1634126258Smlaier int match = 0; 1635126258Smlaier 1636126258Smlaier switch (af) { 1637126258Smlaier#ifdef INET 1638126258Smlaier case AF_INET: 1639126258Smlaier if ((a->addr32[0] & m->addr32[0]) == 1640126258Smlaier (b->addr32[0] & m->addr32[0])) 1641126258Smlaier match++; 1642126258Smlaier break; 1643126258Smlaier#endif /* INET */ 1644126258Smlaier#ifdef INET6 1645126258Smlaier case AF_INET6: 1646126258Smlaier if (((a->addr32[0] & m->addr32[0]) == 1647126258Smlaier (b->addr32[0] & m->addr32[0])) && 1648126258Smlaier ((a->addr32[1] & m->addr32[1]) == 1649126258Smlaier (b->addr32[1] & m->addr32[1])) && 1650126258Smlaier ((a->addr32[2] & m->addr32[2]) == 1651126258Smlaier (b->addr32[2] & m->addr32[2])) && 1652126258Smlaier ((a->addr32[3] & m->addr32[3]) == 1653126258Smlaier (b->addr32[3] & m->addr32[3]))) 1654126258Smlaier match++; 1655126258Smlaier break; 1656126258Smlaier#endif /* INET6 */ 1657126258Smlaier } 1658126258Smlaier if (match) { 1659126258Smlaier if (n) 1660126258Smlaier return (0); 1661126258Smlaier else 1662126258Smlaier return (1); 1663126258Smlaier } else { 1664126258Smlaier if (n) 1665126258Smlaier return (1); 1666126258Smlaier else 1667126258Smlaier return (0); 1668126258Smlaier } 1669126258Smlaier} 1670126258Smlaier 1671126258Smlaierint 1672126258Smlaierpf_match(u_int8_t op, u_int32_t a1, u_int32_t a2, u_int32_t p) 1673126258Smlaier{ 1674126258Smlaier switch (op) { 1675126258Smlaier case PF_OP_IRG: 1676126258Smlaier return ((p > a1) && (p < a2)); 1677126258Smlaier case PF_OP_XRG: 1678126258Smlaier return ((p < a1) || (p > a2)); 1679126258Smlaier case PF_OP_RRG: 1680126258Smlaier return ((p >= a1) && (p <= a2)); 1681126258Smlaier case PF_OP_EQ: 1682126258Smlaier return (p == a1); 1683126258Smlaier case PF_OP_NE: 1684126258Smlaier return (p != a1); 1685126258Smlaier case PF_OP_LT: 1686126258Smlaier return (p < a1); 1687126258Smlaier case PF_OP_LE: 1688126258Smlaier return (p <= a1); 1689126258Smlaier case PF_OP_GT: 1690126258Smlaier return (p > a1); 1691126258Smlaier case PF_OP_GE: 1692126258Smlaier return (p >= a1); 1693126258Smlaier } 1694126258Smlaier return (0); /* never reached */ 1695126258Smlaier} 1696126258Smlaier 1697126258Smlaierint 1698126258Smlaierpf_match_port(u_int8_t op, u_int16_t a1, u_int16_t a2, u_int16_t p) 1699126258Smlaier{ 1700126258Smlaier NTOHS(a1); 1701126258Smlaier NTOHS(a2); 1702126258Smlaier NTOHS(p); 1703126258Smlaier return (pf_match(op, a1, a2, p)); 1704126258Smlaier} 1705126258Smlaier 1706126258Smlaierint 1707126258Smlaierpf_match_uid(u_int8_t op, uid_t a1, uid_t a2, uid_t u) 1708126258Smlaier{ 1709126258Smlaier if (u == UID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1710126258Smlaier return (0); 1711126258Smlaier return (pf_match(op, a1, a2, u)); 1712126258Smlaier} 1713126258Smlaier 1714126258Smlaierint 1715126258Smlaierpf_match_gid(u_int8_t op, gid_t a1, gid_t a2, gid_t g) 1716126258Smlaier{ 1717126258Smlaier if (g == GID_MAX && op != PF_OP_EQ && op != PF_OP_NE) 1718126258Smlaier return (0); 1719126258Smlaier return (pf_match(op, a1, a2, g)); 1720126258Smlaier} 1721126258Smlaier 1722126258Smlaierstruct pf_tag * 1723126258Smlaierpf_get_tag(struct mbuf *m) 1724126258Smlaier{ 1725126258Smlaier struct m_tag *mtag; 1726126258Smlaier 1727126258Smlaier if ((mtag = m_tag_find(m, PACKET_TAG_PF_TAG, NULL)) != NULL) 1728126258Smlaier return ((struct pf_tag *)(mtag + 1)); 1729126258Smlaier else 1730126258Smlaier return (NULL); 1731126258Smlaier} 1732126258Smlaier 1733126258Smlaierint 1734130613Smlaierpf_match_tag(struct mbuf *m, struct pf_rule *r, struct pf_rule *nat_rule, 1735130613Smlaier struct pf_tag *pftag, int *tag) 1736126258Smlaier{ 1737126258Smlaier if (*tag == -1) { /* find mbuf tag */ 1738126258Smlaier pftag = pf_get_tag(m); 1739126258Smlaier if (pftag != NULL) 1740126258Smlaier *tag = pftag->tag; 1741126258Smlaier else 1742126258Smlaier *tag = 0; 1743130613Smlaier if (nat_rule != NULL && nat_rule->tag) 1744130613Smlaier *tag = nat_rule->tag; 1745126258Smlaier } 1746126258Smlaier 1747126258Smlaier return ((!r->match_tag_not && r->match_tag == *tag) || 1748126258Smlaier (r->match_tag_not && r->match_tag != *tag)); 1749126258Smlaier} 1750126258Smlaier 1751126258Smlaierint 1752126258Smlaierpf_tag_packet(struct mbuf *m, struct pf_tag *pftag, int tag) 1753126258Smlaier{ 1754126258Smlaier struct m_tag *mtag; 1755126258Smlaier 1756126258Smlaier if (tag <= 0) 1757126258Smlaier return (0); 1758126258Smlaier 1759126258Smlaier if (pftag == NULL) { 1760126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_TAG, sizeof(*pftag), M_NOWAIT); 1761126258Smlaier if (mtag == NULL) 1762126258Smlaier return (1); 1763126258Smlaier ((struct pf_tag *)(mtag + 1))->tag = tag; 1764126258Smlaier m_tag_prepend(m, mtag); 1765126258Smlaier } else 1766126258Smlaier pftag->tag = tag; 1767126258Smlaier 1768126258Smlaier return (0); 1769126258Smlaier} 1770126258Smlaier 1771126258Smlaier#define PF_STEP_INTO_ANCHOR(r, a, s, n) \ 1772126258Smlaier do { \ 1773126258Smlaier if ((r) == NULL || (r)->anchor == NULL || \ 1774126258Smlaier (s) != NULL || (a) != NULL) \ 1775126258Smlaier panic("PF_STEP_INTO_ANCHOR"); \ 1776126258Smlaier (a) = (r); \ 1777126258Smlaier (s) = TAILQ_FIRST(&(r)->anchor->rulesets); \ 1778126258Smlaier (r) = NULL; \ 1779126258Smlaier while ((s) != NULL && ((r) = \ 1780126258Smlaier TAILQ_FIRST((s)->rules[n].active.ptr)) == NULL) \ 1781126258Smlaier (s) = TAILQ_NEXT((s), entries); \ 1782126258Smlaier if ((r) == NULL) { \ 1783126258Smlaier (r) = TAILQ_NEXT((a), entries); \ 1784126258Smlaier (a) = NULL; \ 1785126258Smlaier } \ 1786126258Smlaier } while (0) 1787126258Smlaier 1788126258Smlaier#define PF_STEP_OUT_OF_ANCHOR(r, a, s, n) \ 1789126258Smlaier do { \ 1790126258Smlaier if ((r) != NULL || (a) == NULL || (s) == NULL) \ 1791126258Smlaier panic("PF_STEP_OUT_OF_ANCHOR"); \ 1792126258Smlaier (s) = TAILQ_NEXT((s), entries); \ 1793126258Smlaier while ((s) != NULL && ((r) = \ 1794126258Smlaier TAILQ_FIRST((s)->rules[n].active.ptr)) == NULL) \ 1795126258Smlaier (s) = TAILQ_NEXT((s), entries); \ 1796126258Smlaier if ((r) == NULL) { \ 1797126258Smlaier (r) = TAILQ_NEXT((a), entries); \ 1798126258Smlaier (a) = NULL; \ 1799126258Smlaier } \ 1800126258Smlaier } while (0) 1801126258Smlaier 1802126258Smlaier#ifdef INET6 1803126258Smlaiervoid 1804126258Smlaierpf_poolmask(struct pf_addr *naddr, struct pf_addr *raddr, 1805126258Smlaier struct pf_addr *rmask, struct pf_addr *saddr, sa_family_t af) 1806126258Smlaier{ 1807126258Smlaier switch (af) { 1808126258Smlaier#ifdef INET 1809126258Smlaier case AF_INET: 1810126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 1811126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 1812126258Smlaier break; 1813126258Smlaier#endif /* INET */ 1814126258Smlaier case AF_INET6: 1815126258Smlaier naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) | 1816126258Smlaier ((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]); 1817126258Smlaier naddr->addr32[1] = (raddr->addr32[1] & rmask->addr32[1]) | 1818126258Smlaier ((rmask->addr32[1] ^ 0xffffffff ) & saddr->addr32[1]); 1819126258Smlaier naddr->addr32[2] = (raddr->addr32[2] & rmask->addr32[2]) | 1820126258Smlaier ((rmask->addr32[2] ^ 0xffffffff ) & saddr->addr32[2]); 1821126258Smlaier naddr->addr32[3] = (raddr->addr32[3] & rmask->addr32[3]) | 1822126258Smlaier ((rmask->addr32[3] ^ 0xffffffff ) & saddr->addr32[3]); 1823126258Smlaier break; 1824126258Smlaier } 1825126258Smlaier} 1826126258Smlaier 1827126258Smlaiervoid 1828130613Smlaierpf_addr_inc(struct pf_addr *addr, sa_family_t af) 1829126258Smlaier{ 1830126258Smlaier switch (af) { 1831126258Smlaier#ifdef INET 1832126258Smlaier case AF_INET: 1833126258Smlaier addr->addr32[0] = htonl(ntohl(addr->addr32[0]) + 1); 1834126258Smlaier break; 1835126258Smlaier#endif /* INET */ 1836126258Smlaier case AF_INET6: 1837126258Smlaier if (addr->addr32[3] == 0xffffffff) { 1838126258Smlaier addr->addr32[3] = 0; 1839126258Smlaier if (addr->addr32[2] == 0xffffffff) { 1840126258Smlaier addr->addr32[2] = 0; 1841126258Smlaier if (addr->addr32[1] == 0xffffffff) { 1842126258Smlaier addr->addr32[1] = 0; 1843126258Smlaier addr->addr32[0] = 1844126258Smlaier htonl(ntohl(addr->addr32[0]) + 1); 1845126258Smlaier } else 1846126258Smlaier addr->addr32[1] = 1847126258Smlaier htonl(ntohl(addr->addr32[1]) + 1); 1848126258Smlaier } else 1849126258Smlaier addr->addr32[2] = 1850126258Smlaier htonl(ntohl(addr->addr32[2]) + 1); 1851126258Smlaier } else 1852126258Smlaier addr->addr32[3] = 1853126258Smlaier htonl(ntohl(addr->addr32[3]) + 1); 1854126258Smlaier break; 1855126258Smlaier } 1856126258Smlaier} 1857126258Smlaier#endif /* INET6 */ 1858126258Smlaier 1859126258Smlaier#define mix(a,b,c) \ 1860126258Smlaier do { \ 1861126258Smlaier a -= b; a -= c; a ^= (c >> 13); \ 1862126258Smlaier b -= c; b -= a; b ^= (a << 8); \ 1863126258Smlaier c -= a; c -= b; c ^= (b >> 13); \ 1864126258Smlaier a -= b; a -= c; a ^= (c >> 12); \ 1865126258Smlaier b -= c; b -= a; b ^= (a << 16); \ 1866126258Smlaier c -= a; c -= b; c ^= (b >> 5); \ 1867126258Smlaier a -= b; a -= c; a ^= (c >> 3); \ 1868126258Smlaier b -= c; b -= a; b ^= (a << 10); \ 1869126258Smlaier c -= a; c -= b; c ^= (b >> 15); \ 1870126258Smlaier } while (0) 1871126258Smlaier 1872126258Smlaier/* 1873126258Smlaier * hash function based on bridge_hash in if_bridge.c 1874126258Smlaier */ 1875126258Smlaiervoid 1876126258Smlaierpf_hash(struct pf_addr *inaddr, struct pf_addr *hash, 1877126258Smlaier struct pf_poolhashkey *key, sa_family_t af) 1878126258Smlaier{ 1879126258Smlaier u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0]; 1880126258Smlaier 1881126258Smlaier switch (af) { 1882126258Smlaier#ifdef INET 1883126258Smlaier case AF_INET: 1884126258Smlaier a += inaddr->addr32[0]; 1885126258Smlaier b += key->key32[1]; 1886126258Smlaier mix(a, b, c); 1887126258Smlaier hash->addr32[0] = c + key->key32[2]; 1888126258Smlaier break; 1889126258Smlaier#endif /* INET */ 1890126258Smlaier#ifdef INET6 1891126258Smlaier case AF_INET6: 1892126258Smlaier a += inaddr->addr32[0]; 1893126258Smlaier b += inaddr->addr32[2]; 1894126258Smlaier mix(a, b, c); 1895126258Smlaier hash->addr32[0] = c; 1896126258Smlaier a += inaddr->addr32[1]; 1897126258Smlaier b += inaddr->addr32[3]; 1898126258Smlaier c += key->key32[1]; 1899126258Smlaier mix(a, b, c); 1900126258Smlaier hash->addr32[1] = c; 1901126258Smlaier a += inaddr->addr32[2]; 1902126258Smlaier b += inaddr->addr32[1]; 1903126258Smlaier c += key->key32[2]; 1904126258Smlaier mix(a, b, c); 1905126258Smlaier hash->addr32[2] = c; 1906126258Smlaier a += inaddr->addr32[3]; 1907126258Smlaier b += inaddr->addr32[0]; 1908126258Smlaier c += key->key32[3]; 1909126258Smlaier mix(a, b, c); 1910126258Smlaier hash->addr32[3] = c; 1911126258Smlaier break; 1912126258Smlaier#endif /* INET6 */ 1913126258Smlaier } 1914126258Smlaier} 1915126258Smlaier 1916126258Smlaierint 1917130613Smlaierpf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr, 1918130613Smlaier struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn) 1919126258Smlaier{ 1920126258Smlaier unsigned char hash[16]; 1921130613Smlaier struct pf_pool *rpool = &r->rpool; 1922130613Smlaier struct pf_addr *raddr = &rpool->cur->addr.v.a.addr; 1923130613Smlaier struct pf_addr *rmask = &rpool->cur->addr.v.a.mask; 1924126258Smlaier struct pf_pooladdr *acur = rpool->cur; 1925130613Smlaier struct pf_src_node k; 1926126258Smlaier 1927130613Smlaier if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR && 1928130613Smlaier (r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 1929130613Smlaier k.af = af; 1930130613Smlaier PF_ACPY(&k.addr, saddr, af); 1931130613Smlaier if (r->rule_flag & PFRULE_RULESRCTRACK || 1932130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) 1933130613Smlaier k.rule.ptr = r; 1934130613Smlaier else 1935130613Smlaier k.rule.ptr = NULL; 1936130613Smlaier pf_status.scounters[SCNT_SRC_NODE_SEARCH]++; 1937130613Smlaier *sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k); 1938130613Smlaier if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) { 1939130613Smlaier PF_ACPY(naddr, &(*sn)->raddr, af); 1940130613Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 1941130613Smlaier printf("pf_map_addr: src tracking maps "); 1942130613Smlaier pf_print_host(&k.addr, 0, af); 1943130613Smlaier printf(" to "); 1944130613Smlaier pf_print_host(naddr, 0, af); 1945130613Smlaier printf("\n"); 1946130613Smlaier } 1947130613Smlaier return (0); 1948130613Smlaier } 1949130613Smlaier } 1950130613Smlaier 1951126258Smlaier if (rpool->cur->addr.type == PF_ADDR_NOROUTE) 1952126258Smlaier return (1); 1953130613Smlaier if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 1954130613Smlaier if (af == AF_INET) { 1955130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 && 1956130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 1957130613Smlaier PF_POOL_ROUNDROBIN) 1958130613Smlaier return (1); 1959130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr4; 1960130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask4; 1961130613Smlaier } else { 1962130613Smlaier if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 && 1963130613Smlaier (rpool->opts & PF_POOL_TYPEMASK) != 1964130613Smlaier PF_POOL_ROUNDROBIN) 1965130613Smlaier return (1); 1966130613Smlaier raddr = &rpool->cur->addr.p.dyn->pfid_addr6; 1967130613Smlaier rmask = &rpool->cur->addr.p.dyn->pfid_mask6; 1968130613Smlaier } 1969130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_TABLE) { 1970126258Smlaier if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN) 1971126258Smlaier return (1); /* unsupported */ 1972126258Smlaier } else { 1973126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 1974126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 1975126258Smlaier } 1976126258Smlaier 1977126258Smlaier switch (rpool->opts & PF_POOL_TYPEMASK) { 1978126258Smlaier case PF_POOL_NONE: 1979126258Smlaier PF_ACPY(naddr, raddr, af); 1980126258Smlaier break; 1981126258Smlaier case PF_POOL_BITMASK: 1982126258Smlaier PF_POOLMASK(naddr, raddr, rmask, saddr, af); 1983126258Smlaier break; 1984126258Smlaier case PF_POOL_RANDOM: 1985126258Smlaier if (init_addr != NULL && PF_AZERO(init_addr, af)) { 1986126258Smlaier switch (af) { 1987126258Smlaier#ifdef INET 1988126258Smlaier case AF_INET: 1989126258Smlaier rpool->counter.addr32[0] = arc4random(); 1990126258Smlaier break; 1991126258Smlaier#endif /* INET */ 1992126258Smlaier#ifdef INET6 1993126258Smlaier case AF_INET6: 1994126258Smlaier if (rmask->addr32[3] != 0xffffffff) 1995126258Smlaier rpool->counter.addr32[3] = arc4random(); 1996126258Smlaier else 1997126258Smlaier break; 1998126258Smlaier if (rmask->addr32[2] != 0xffffffff) 1999126258Smlaier rpool->counter.addr32[2] = arc4random(); 2000126258Smlaier else 2001126258Smlaier break; 2002126258Smlaier if (rmask->addr32[1] != 0xffffffff) 2003126258Smlaier rpool->counter.addr32[1] = arc4random(); 2004126258Smlaier else 2005126258Smlaier break; 2006126258Smlaier if (rmask->addr32[0] != 0xffffffff) 2007126258Smlaier rpool->counter.addr32[0] = arc4random(); 2008126258Smlaier break; 2009126258Smlaier#endif /* INET6 */ 2010126258Smlaier } 2011126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2012126258Smlaier PF_ACPY(init_addr, naddr, af); 2013126258Smlaier 2014126258Smlaier } else { 2015126258Smlaier PF_AINC(&rpool->counter, af); 2016126258Smlaier PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af); 2017126258Smlaier } 2018126258Smlaier break; 2019126258Smlaier case PF_POOL_SRCHASH: 2020126258Smlaier pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af); 2021126258Smlaier PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af); 2022126258Smlaier break; 2023126258Smlaier case PF_POOL_ROUNDROBIN: 2024126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2025126258Smlaier if (!pfr_pool_get(rpool->cur->addr.p.tbl, 2026126258Smlaier &rpool->tblidx, &rpool->counter, 2027126258Smlaier &raddr, &rmask, af)) 2028126258Smlaier goto get_addr; 2029130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2030130613Smlaier if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2031130613Smlaier &rpool->tblidx, &rpool->counter, 2032130613Smlaier &raddr, &rmask, af)) 2033130613Smlaier goto get_addr; 2034126258Smlaier } else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af)) 2035126258Smlaier goto get_addr; 2036126258Smlaier 2037126258Smlaier try_next: 2038126258Smlaier if ((rpool->cur = TAILQ_NEXT(rpool->cur, entries)) == NULL) 2039126258Smlaier rpool->cur = TAILQ_FIRST(&rpool->list); 2040126258Smlaier if (rpool->cur->addr.type == PF_ADDR_TABLE) { 2041126258Smlaier rpool->tblidx = -1; 2042126258Smlaier if (pfr_pool_get(rpool->cur->addr.p.tbl, 2043126258Smlaier &rpool->tblidx, &rpool->counter, 2044126258Smlaier &raddr, &rmask, af)) { 2045130613Smlaier /* table contains no address of type 'af' */ 2046126258Smlaier if (rpool->cur != acur) 2047126258Smlaier goto try_next; 2048126258Smlaier return (1); 2049126258Smlaier } 2050130613Smlaier } else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) { 2051130613Smlaier rpool->tblidx = -1; 2052130613Smlaier if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt, 2053130613Smlaier &rpool->tblidx, &rpool->counter, 2054130613Smlaier &raddr, &rmask, af)) { 2055130613Smlaier /* table contains no address of type 'af' */ 2056130613Smlaier if (rpool->cur != acur) 2057130613Smlaier goto try_next; 2058130613Smlaier return (1); 2059130613Smlaier } 2060126258Smlaier } else { 2061126258Smlaier raddr = &rpool->cur->addr.v.a.addr; 2062126258Smlaier rmask = &rpool->cur->addr.v.a.mask; 2063126258Smlaier PF_ACPY(&rpool->counter, raddr, af); 2064126258Smlaier } 2065126258Smlaier 2066126258Smlaier get_addr: 2067126258Smlaier PF_ACPY(naddr, &rpool->counter, af); 2068126258Smlaier PF_AINC(&rpool->counter, af); 2069126258Smlaier break; 2070126258Smlaier } 2071130613Smlaier if (*sn != NULL) 2072130613Smlaier PF_ACPY(&(*sn)->raddr, naddr, af); 2073126258Smlaier 2074126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC && 2075126258Smlaier (rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) { 2076130613Smlaier printf("pf_map_addr: selected address "); 2077126258Smlaier pf_print_host(naddr, 0, af); 2078126258Smlaier printf("\n"); 2079126258Smlaier } 2080126258Smlaier 2081126258Smlaier return (0); 2082126258Smlaier} 2083126258Smlaier 2084126258Smlaierint 2085130613Smlaierpf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r, 2086126258Smlaier struct pf_addr *saddr, struct pf_addr *daddr, u_int16_t dport, 2087130613Smlaier struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high, 2088130613Smlaier struct pf_src_node **sn) 2089126258Smlaier{ 2090130613Smlaier struct pf_state key; 2091126258Smlaier struct pf_addr init_addr; 2092126258Smlaier u_int16_t cut; 2093126258Smlaier 2094126258Smlaier bzero(&init_addr, sizeof(init_addr)); 2095130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2096126258Smlaier return (1); 2097126258Smlaier 2098126258Smlaier do { 2099126258Smlaier key.af = af; 2100126258Smlaier key.proto = proto; 2101130613Smlaier PF_ACPY(&key.ext.addr, daddr, key.af); 2102130613Smlaier PF_ACPY(&key.gwy.addr, naddr, key.af); 2103130613Smlaier key.ext.port = dport; 2104126258Smlaier 2105126258Smlaier /* 2106126258Smlaier * port search; start random, step; 2107126258Smlaier * similar 2 portloop in in_pcbbind 2108126258Smlaier */ 2109126258Smlaier if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP)) { 2110130613Smlaier key.gwy.port = 0; 2111130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2112126258Smlaier return (0); 2113126258Smlaier } else if (low == 0 && high == 0) { 2114130613Smlaier key.gwy.port = *nport; 2115130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) 2116126258Smlaier return (0); 2117126258Smlaier } else if (low == high) { 2118130613Smlaier key.gwy.port = htons(low); 2119130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) { 2120126258Smlaier *nport = htons(low); 2121126258Smlaier return (0); 2122126258Smlaier } 2123126258Smlaier } else { 2124126258Smlaier u_int16_t tmp; 2125126258Smlaier 2126126258Smlaier if (low > high) { 2127126258Smlaier tmp = low; 2128126258Smlaier low = high; 2129126258Smlaier high = tmp; 2130126258Smlaier } 2131126258Smlaier /* low < high */ 2132126258Smlaier cut = arc4random() % (1 + high - low) + low; 2133126258Smlaier /* low <= cut <= high */ 2134126258Smlaier for (tmp = cut; tmp <= high; ++(tmp)) { 2135130613Smlaier key.gwy.port = htons(tmp); 2136130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2137126258Smlaier NULL) { 2138126258Smlaier *nport = htons(tmp); 2139126258Smlaier return (0); 2140126258Smlaier } 2141126258Smlaier } 2142126258Smlaier for (tmp = cut - 1; tmp >= low; --(tmp)) { 2143130613Smlaier key.gwy.port = htons(tmp); 2144130613Smlaier if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == 2145126258Smlaier NULL) { 2146126258Smlaier *nport = htons(tmp); 2147126258Smlaier return (0); 2148126258Smlaier } 2149126258Smlaier } 2150126258Smlaier } 2151126258Smlaier 2152130613Smlaier switch (r->rpool.opts & PF_POOL_TYPEMASK) { 2153126258Smlaier case PF_POOL_RANDOM: 2154126258Smlaier case PF_POOL_ROUNDROBIN: 2155130613Smlaier if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn)) 2156126258Smlaier return (1); 2157126258Smlaier break; 2158126258Smlaier case PF_POOL_NONE: 2159126258Smlaier case PF_POOL_SRCHASH: 2160126258Smlaier case PF_POOL_BITMASK: 2161126258Smlaier default: 2162126258Smlaier return (1); 2163126258Smlaier } 2164126258Smlaier } while (! PF_AEQ(&init_addr, naddr, af) ); 2165126258Smlaier 2166126258Smlaier return (1); /* none available */ 2167126258Smlaier} 2168126258Smlaier 2169126258Smlaierstruct pf_rule * 2170126258Smlaierpf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off, 2171130613Smlaier int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport, 2172126258Smlaier struct pf_addr *daddr, u_int16_t dport, int rs_num) 2173126258Smlaier{ 2174126258Smlaier struct pf_rule *r, *rm = NULL, *anchorrule = NULL; 2175126258Smlaier struct pf_ruleset *ruleset = NULL; 2176126258Smlaier 2177126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr); 2178126258Smlaier while (r && rm == NULL) { 2179126258Smlaier struct pf_rule_addr *src = NULL, *dst = NULL; 2180126258Smlaier struct pf_addr_wrap *xdst = NULL; 2181126258Smlaier 2182126258Smlaier if (r->action == PF_BINAT && direction == PF_IN) { 2183126258Smlaier src = &r->dst; 2184126258Smlaier if (r->rpool.cur != NULL) 2185126258Smlaier xdst = &r->rpool.cur->addr; 2186126258Smlaier } else { 2187126258Smlaier src = &r->src; 2188126258Smlaier dst = &r->dst; 2189126258Smlaier } 2190126258Smlaier 2191126258Smlaier r->evaluations++; 2192130613Smlaier if (r->kif != NULL && 2193130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 2194126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 2195126258Smlaier else if (r->direction && r->direction != direction) 2196126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 2197126258Smlaier else if (r->af && r->af != pd->af) 2198126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 2199126258Smlaier else if (r->proto && r->proto != pd->proto) 2200126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 2201126258Smlaier else if (PF_MISMATCHAW(&src->addr, saddr, pd->af, src->not)) 2202126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR : 2203126258Smlaier PF_SKIP_DST_ADDR].ptr; 2204126258Smlaier else if (src->port_op && !pf_match_port(src->port_op, 2205126258Smlaier src->port[0], src->port[1], sport)) 2206126258Smlaier r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT : 2207126258Smlaier PF_SKIP_DST_PORT].ptr; 2208126258Smlaier else if (dst != NULL && 2209126258Smlaier PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->not)) 2210126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 2211126258Smlaier else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af, 0)) 2212126258Smlaier r = TAILQ_NEXT(r, entries); 2213126258Smlaier else if (dst != NULL && dst->port_op && 2214126258Smlaier !pf_match_port(dst->port_op, dst->port[0], 2215126258Smlaier dst->port[1], dport)) 2216126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 2217126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto != 2218126258Smlaier IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m, 2219126258Smlaier off, pd->hdr.tcp), r->os_fingerprint))) 2220126258Smlaier r = TAILQ_NEXT(r, entries); 2221126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 2222126258Smlaier r = TAILQ_NEXT(r, entries); 2223126258Smlaier else if (r->anchor == NULL) 2224126258Smlaier rm = r; 2225126258Smlaier else 2226126258Smlaier PF_STEP_INTO_ANCHOR(r, anchorrule, ruleset, rs_num); 2227126258Smlaier if (r == NULL && anchorrule != NULL) 2228126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, anchorrule, ruleset, 2229126258Smlaier rs_num); 2230126258Smlaier } 2231126258Smlaier if (rm != NULL && (rm->action == PF_NONAT || 2232126258Smlaier rm->action == PF_NORDR || rm->action == PF_NOBINAT)) 2233126258Smlaier return (NULL); 2234126258Smlaier return (rm); 2235126258Smlaier} 2236126258Smlaier 2237126258Smlaierstruct pf_rule * 2238126258Smlaierpf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction, 2239130613Smlaier struct pfi_kif *kif, struct pf_src_node **sn, 2240126258Smlaier struct pf_addr *saddr, u_int16_t sport, 2241126258Smlaier struct pf_addr *daddr, u_int16_t dport, 2242126258Smlaier struct pf_addr *naddr, u_int16_t *nport) 2243126258Smlaier{ 2244126258Smlaier struct pf_rule *r = NULL; 2245126258Smlaier 2246126258Smlaier if (direction == PF_OUT) { 2247130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2248126258Smlaier sport, daddr, dport, PF_RULESET_BINAT); 2249126258Smlaier if (r == NULL) 2250130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2251126258Smlaier saddr, sport, daddr, dport, PF_RULESET_NAT); 2252126258Smlaier } else { 2253130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, saddr, 2254126258Smlaier sport, daddr, dport, PF_RULESET_RDR); 2255126258Smlaier if (r == NULL) 2256130613Smlaier r = pf_match_translation(pd, m, off, direction, kif, 2257126258Smlaier saddr, sport, daddr, dport, PF_RULESET_BINAT); 2258126258Smlaier } 2259126258Smlaier 2260126258Smlaier if (r != NULL) { 2261126258Smlaier switch (r->action) { 2262126258Smlaier case PF_NONAT: 2263126258Smlaier case PF_NOBINAT: 2264126258Smlaier case PF_NORDR: 2265126258Smlaier return (NULL); 2266126258Smlaier case PF_NAT: 2267130613Smlaier if (pf_get_sport(pd->af, pd->proto, r, saddr, 2268126258Smlaier daddr, dport, naddr, nport, r->rpool.proxy_port[0], 2269130613Smlaier r->rpool.proxy_port[1], sn)) { 2270126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 2271126258Smlaier ("pf: NAT proxy port allocation " 2272126258Smlaier "(%u-%u) failed\n", 2273126258Smlaier r->rpool.proxy_port[0], 2274126258Smlaier r->rpool.proxy_port[1])); 2275126258Smlaier return (NULL); 2276126258Smlaier } 2277126258Smlaier break; 2278126258Smlaier case PF_BINAT: 2279126258Smlaier switch (direction) { 2280126258Smlaier case PF_OUT: 2281130613Smlaier if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){ 2282130613Smlaier if (pd->af == AF_INET) { 2283130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2284130613Smlaier pfid_acnt4 < 1) 2285130613Smlaier return (NULL); 2286130613Smlaier PF_POOLMASK(naddr, 2287130613Smlaier &r->rpool.cur->addr.p.dyn-> 2288130613Smlaier pfid_addr4, 2289130613Smlaier &r->rpool.cur->addr.p.dyn-> 2290130613Smlaier pfid_mask4, 2291130613Smlaier saddr, AF_INET); 2292130613Smlaier } else { 2293130613Smlaier if (r->rpool.cur->addr.p.dyn-> 2294130613Smlaier pfid_acnt6 < 1) 2295130613Smlaier return (NULL); 2296130613Smlaier PF_POOLMASK(naddr, 2297130613Smlaier &r->rpool.cur->addr.p.dyn-> 2298130613Smlaier pfid_addr6, 2299130613Smlaier &r->rpool.cur->addr.p.dyn-> 2300130613Smlaier pfid_mask6, 2301130613Smlaier saddr, AF_INET6); 2302130613Smlaier } 2303130613Smlaier } else 2304126258Smlaier PF_POOLMASK(naddr, 2305126258Smlaier &r->rpool.cur->addr.v.a.addr, 2306126258Smlaier &r->rpool.cur->addr.v.a.mask, 2307126258Smlaier saddr, pd->af); 2308126258Smlaier break; 2309126258Smlaier case PF_IN: 2310130613Smlaier if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){ 2311130613Smlaier if (pd->af == AF_INET) { 2312130613Smlaier if (r->src.addr.p.dyn-> 2313130613Smlaier pfid_acnt4 < 1) 2314130613Smlaier return (NULL); 2315130613Smlaier PF_POOLMASK(naddr, 2316130613Smlaier &r->src.addr.p.dyn-> 2317130613Smlaier pfid_addr4, 2318130613Smlaier &r->src.addr.p.dyn-> 2319130613Smlaier pfid_mask4, 2320130613Smlaier daddr, AF_INET); 2321130613Smlaier } else { 2322130613Smlaier if (r->src.addr.p.dyn-> 2323130613Smlaier pfid_acnt6 < 1) 2324130613Smlaier return (NULL); 2325130613Smlaier PF_POOLMASK(naddr, 2326130613Smlaier &r->src.addr.p.dyn-> 2327130613Smlaier pfid_addr6, 2328130613Smlaier &r->src.addr.p.dyn-> 2329130613Smlaier pfid_mask6, 2330130613Smlaier daddr, AF_INET6); 2331130613Smlaier } 2332130613Smlaier } else 2333126258Smlaier PF_POOLMASK(naddr, 2334126258Smlaier &r->src.addr.v.a.addr, 2335126261Smlaier &r->src.addr.v.a.mask, daddr, 2336126258Smlaier pd->af); 2337126258Smlaier break; 2338126258Smlaier } 2339126258Smlaier break; 2340126258Smlaier case PF_RDR: { 2341130613Smlaier if (pf_map_addr(r->af, r, saddr, naddr, NULL, sn)) 2342126258Smlaier return (NULL); 2343126258Smlaier 2344126258Smlaier if (r->rpool.proxy_port[1]) { 2345126258Smlaier u_int32_t tmp_nport; 2346126258Smlaier 2347126258Smlaier tmp_nport = ((ntohs(dport) - 2348126258Smlaier ntohs(r->dst.port[0])) % 2349126258Smlaier (r->rpool.proxy_port[1] - 2350126258Smlaier r->rpool.proxy_port[0] + 1)) + 2351126258Smlaier r->rpool.proxy_port[0]; 2352126258Smlaier 2353126258Smlaier /* wrap around if necessary */ 2354126258Smlaier if (tmp_nport > 65535) 2355126258Smlaier tmp_nport -= 65535; 2356126258Smlaier *nport = htons((u_int16_t)tmp_nport); 2357126258Smlaier } else if (r->rpool.proxy_port[0]) 2358126258Smlaier *nport = htons(r->rpool.proxy_port[0]); 2359126258Smlaier break; 2360126258Smlaier } 2361126258Smlaier default: 2362126258Smlaier return (NULL); 2363126258Smlaier } 2364126258Smlaier } 2365126258Smlaier 2366126258Smlaier return (r); 2367126258Smlaier} 2368126258Smlaier 2369126258Smlaierint 2370130613Smlaierpf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd) 2371126258Smlaier{ 2372126258Smlaier struct pf_addr *saddr, *daddr; 2373126258Smlaier u_int16_t sport, dport; 2374127145Smlaier#ifdef __FreeBSD__ 2375126261Smlaier struct inpcbinfo *pi; 2376126261Smlaier#else 2377126258Smlaier struct inpcbtable *tb; 2378126261Smlaier#endif 2379126258Smlaier struct inpcb *inp; 2380126258Smlaier 2381126258Smlaier *uid = UID_MAX; 2382126258Smlaier *gid = GID_MAX; 2383130613Smlaier switch (pd->proto) { 2384126258Smlaier case IPPROTO_TCP: 2385126258Smlaier sport = pd->hdr.tcp->th_sport; 2386126258Smlaier dport = pd->hdr.tcp->th_dport; 2387127145Smlaier#ifdef __FreeBSD__ 2388126261Smlaier pi = &tcbinfo; 2389126261Smlaier#else 2390126258Smlaier tb = &tcbtable; 2391126261Smlaier#endif 2392126258Smlaier break; 2393126258Smlaier case IPPROTO_UDP: 2394126258Smlaier sport = pd->hdr.udp->uh_sport; 2395126258Smlaier dport = pd->hdr.udp->uh_dport; 2396127145Smlaier#ifdef __FreeBSD__ 2397126261Smlaier pi = &udbinfo; 2398126261Smlaier#else 2399126258Smlaier tb = &udbtable; 2400126261Smlaier#endif 2401126258Smlaier break; 2402126258Smlaier default: 2403126258Smlaier return (0); 2404126258Smlaier } 2405126258Smlaier if (direction == PF_IN) { 2406126258Smlaier saddr = pd->src; 2407126258Smlaier daddr = pd->dst; 2408126258Smlaier } else { 2409126258Smlaier u_int16_t p; 2410126258Smlaier 2411126258Smlaier p = sport; 2412126258Smlaier sport = dport; 2413126258Smlaier dport = p; 2414126258Smlaier saddr = pd->dst; 2415126258Smlaier daddr = pd->src; 2416126258Smlaier } 2417130613Smlaier switch (pd->af) { 2418126258Smlaier case AF_INET: 2419127145Smlaier#ifdef __FreeBSD__ 2420126261Smlaier INP_INFO_RLOCK(pi); /* XXX LOR */ 2421126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, daddr->v4, 2422126261Smlaier dport, 0, NULL); 2423126261Smlaier if (inp == NULL) { 2424126261Smlaier inp = in_pcblookup_hash(pi, saddr->v4, sport, 2425126261Smlaier daddr->v4, dport, INPLOOKUP_WILDCARD, NULL); 2426126261Smlaier if(inp == NULL) { 2427126261Smlaier INP_INFO_RUNLOCK(pi); 2428126261Smlaier return (0); 2429126261Smlaier } 2430126261Smlaier } 2431126261Smlaier#else 2432126258Smlaier inp = in_pcbhashlookup(tb, saddr->v4, sport, daddr->v4, dport); 2433126258Smlaier if (inp == NULL) { 2434130613Smlaier inp = in_pcblookup_listen(tb, daddr->v4, dport, 0); 2435126258Smlaier if (inp == NULL) 2436126258Smlaier return (0); 2437126258Smlaier } 2438126261Smlaier#endif 2439126258Smlaier break; 2440126258Smlaier#ifdef INET6 2441126258Smlaier case AF_INET6: 2442127145Smlaier#ifdef __FreeBSD__ 2443126261Smlaier INP_INFO_RLOCK(pi); 2444126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2445126261Smlaier &daddr->v6, dport, 0, NULL); 2446126261Smlaier if (inp == NULL) { 2447126261Smlaier inp = in6_pcblookup_hash(pi, &saddr->v6, sport, 2448126261Smlaier &daddr->v6, dport, INPLOOKUP_WILDCARD, NULL); 2449126261Smlaier if (inp == NULL) { 2450126261Smlaier INP_INFO_RUNLOCK(pi); 2451126261Smlaier return (0); 2452126261Smlaier } 2453126261Smlaier } 2454126261Smlaier#else 2455126258Smlaier inp = in6_pcbhashlookup(tb, &saddr->v6, sport, &daddr->v6, 2456126258Smlaier dport); 2457126258Smlaier if (inp == NULL) { 2458130613Smlaier inp = in6_pcblookup_listen(tb, &daddr->v6, dport, 0); 2459126258Smlaier if (inp == NULL) 2460126258Smlaier return (0); 2461126258Smlaier } 2462126261Smlaier#endif 2463126258Smlaier break; 2464126258Smlaier#endif /* INET6 */ 2465126258Smlaier 2466126258Smlaier default: 2467126258Smlaier return (0); 2468126258Smlaier } 2469127145Smlaier#ifdef __FreeBSD__ 2470126261Smlaier INP_LOCK(inp); 2471126261Smlaier *uid = inp->inp_socket->so_cred->cr_uid; 2472126261Smlaier *gid = inp->inp_socket->so_cred->cr_groups[0]; 2473126261Smlaier INP_UNLOCK(inp); 2474126261Smlaier INP_INFO_RUNLOCK(pi); 2475126261Smlaier#else 2476126258Smlaier *uid = inp->inp_socket->so_euid; 2477126258Smlaier *gid = inp->inp_socket->so_egid; 2478126261Smlaier#endif 2479126258Smlaier return (1); 2480126258Smlaier} 2481126258Smlaier 2482126258Smlaieru_int8_t 2483126258Smlaierpf_get_wscale(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2484126258Smlaier{ 2485126258Smlaier int hlen; 2486126258Smlaier u_int8_t hdr[60]; 2487126258Smlaier u_int8_t *opt, optlen; 2488126258Smlaier u_int8_t wscale = 0; 2489126258Smlaier 2490126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2491126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2492126258Smlaier return (0); 2493126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2494126258Smlaier return (0); 2495126258Smlaier opt = hdr + sizeof(struct tcphdr); 2496126258Smlaier hlen -= sizeof(struct tcphdr); 2497126258Smlaier while (hlen >= 3) { 2498126258Smlaier switch (*opt) { 2499126258Smlaier case TCPOPT_EOL: 2500126258Smlaier case TCPOPT_NOP: 2501126258Smlaier ++opt; 2502126258Smlaier --hlen; 2503126258Smlaier break; 2504126258Smlaier case TCPOPT_WINDOW: 2505126258Smlaier wscale = opt[2]; 2506126258Smlaier if (wscale > TCP_MAX_WINSHIFT) 2507126258Smlaier wscale = TCP_MAX_WINSHIFT; 2508126258Smlaier wscale |= PF_WSCALE_FLAG; 2509130613Smlaier /* FALLTHROUGH */ 2510126258Smlaier default: 2511126258Smlaier optlen = opt[1]; 2512126258Smlaier if (optlen < 2) 2513126258Smlaier optlen = 2; 2514126258Smlaier hlen -= optlen; 2515126258Smlaier opt += optlen; 2516130613Smlaier break; 2517126258Smlaier } 2518126258Smlaier } 2519126258Smlaier return (wscale); 2520126258Smlaier} 2521126258Smlaier 2522126258Smlaieru_int16_t 2523126258Smlaierpf_get_mss(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af) 2524126258Smlaier{ 2525126258Smlaier int hlen; 2526126258Smlaier u_int8_t hdr[60]; 2527126258Smlaier u_int8_t *opt, optlen; 2528126258Smlaier u_int16_t mss = tcp_mssdflt; 2529126258Smlaier 2530126258Smlaier hlen = th_off << 2; /* hlen <= sizeof(hdr) */ 2531126258Smlaier if (hlen <= sizeof(struct tcphdr)) 2532126258Smlaier return (0); 2533126258Smlaier if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af)) 2534126258Smlaier return (0); 2535126258Smlaier opt = hdr + sizeof(struct tcphdr); 2536126258Smlaier hlen -= sizeof(struct tcphdr); 2537126258Smlaier while (hlen >= TCPOLEN_MAXSEG) { 2538126258Smlaier switch (*opt) { 2539126258Smlaier case TCPOPT_EOL: 2540126258Smlaier case TCPOPT_NOP: 2541126258Smlaier ++opt; 2542126258Smlaier --hlen; 2543126258Smlaier break; 2544126258Smlaier case TCPOPT_MAXSEG: 2545126258Smlaier bcopy((caddr_t)(opt + 2), (caddr_t)&mss, 2); 2546130613Smlaier /* FALLTHROUGH */ 2547126258Smlaier default: 2548126258Smlaier optlen = opt[1]; 2549126258Smlaier if (optlen < 2) 2550126258Smlaier optlen = 2; 2551126258Smlaier hlen -= optlen; 2552126258Smlaier opt += optlen; 2553130613Smlaier break; 2554126258Smlaier } 2555126258Smlaier } 2556126258Smlaier return (mss); 2557126258Smlaier} 2558126258Smlaier 2559126258Smlaieru_int16_t 2560126258Smlaierpf_calc_mss(struct pf_addr *addr, sa_family_t af, u_int16_t offer) 2561126258Smlaier{ 2562126258Smlaier#ifdef INET 2563126258Smlaier struct sockaddr_in *dst; 2564126258Smlaier struct route ro; 2565126258Smlaier#endif /* INET */ 2566126258Smlaier#ifdef INET6 2567126258Smlaier struct sockaddr_in6 *dst6; 2568126258Smlaier struct route_in6 ro6; 2569126258Smlaier#endif /* INET6 */ 2570126258Smlaier struct rtentry *rt = NULL; 2571127629Smlaier int hlen = 0; /* make the compiler happy */ 2572126258Smlaier u_int16_t mss = tcp_mssdflt; 2573126258Smlaier 2574126258Smlaier switch (af) { 2575126258Smlaier#ifdef INET 2576126258Smlaier case AF_INET: 2577126258Smlaier hlen = sizeof(struct ip); 2578126258Smlaier bzero(&ro, sizeof(ro)); 2579126258Smlaier dst = (struct sockaddr_in *)&ro.ro_dst; 2580126258Smlaier dst->sin_family = AF_INET; 2581126258Smlaier dst->sin_len = sizeof(*dst); 2582126258Smlaier dst->sin_addr = addr->v4; 2583127145Smlaier#ifdef __FreeBSD__ 2584126261Smlaier#ifdef RTF_PRCLONING 2585126261Smlaier rtalloc_ign(&ro, (RTF_CLONING | RTF_PRCLONING)); 2586126261Smlaier#else /* !RTF_PRCLONING */ 2587126261Smlaier rtalloc_ign(&ro, RTF_CLONING); 2588126261Smlaier#endif 2589126261Smlaier#else /* ! __FreeBSD__ */ 2590126258Smlaier rtalloc_noclone(&ro, NO_CLONING); 2591126261Smlaier#endif 2592126258Smlaier rt = ro.ro_rt; 2593126258Smlaier break; 2594126258Smlaier#endif /* INET */ 2595126258Smlaier#ifdef INET6 2596126258Smlaier case AF_INET6: 2597126258Smlaier hlen = sizeof(struct ip6_hdr); 2598126258Smlaier bzero(&ro6, sizeof(ro6)); 2599126258Smlaier dst6 = (struct sockaddr_in6 *)&ro6.ro_dst; 2600126258Smlaier dst6->sin6_family = AF_INET6; 2601126258Smlaier dst6->sin6_len = sizeof(*dst6); 2602126258Smlaier dst6->sin6_addr = addr->v6; 2603127145Smlaier#ifdef __FreeBSD__ 2604126261Smlaier#ifdef RTF_PRCLONING 2605126261Smlaier rtalloc_ign((struct route *)&ro6, 2606126261Smlaier (RTF_CLONING | RTF_PRCLONING)); 2607126261Smlaier#else /* !RTF_PRCLONING */ 2608126261Smlaier rtalloc_ign((struct route *)&ro6, RTF_CLONING); 2609126261Smlaier#endif 2610126261Smlaier#else /* ! __FreeBSD__ */ 2611126258Smlaier rtalloc_noclone((struct route *)&ro6, NO_CLONING); 2612126261Smlaier#endif 2613126258Smlaier rt = ro6.ro_rt; 2614126258Smlaier break; 2615126258Smlaier#endif /* INET6 */ 2616126258Smlaier } 2617126258Smlaier 2618126258Smlaier if (rt && rt->rt_ifp) { 2619126258Smlaier mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr); 2620126258Smlaier mss = max(tcp_mssdflt, mss); 2621126258Smlaier RTFREE(rt); 2622126258Smlaier } 2623126258Smlaier mss = min(mss, offer); 2624126258Smlaier mss = max(mss, 64); /* sanity - at least max opt space */ 2625126258Smlaier return (mss); 2626126258Smlaier} 2627126258Smlaier 2628126258Smlaiervoid 2629126258Smlaierpf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr) 2630126258Smlaier{ 2631126258Smlaier struct pf_rule *r = s->rule.ptr; 2632126258Smlaier 2633130613Smlaier s->rt_kif = NULL; 2634126258Smlaier if (!r->rt || r->rt == PF_FASTROUTE) 2635126258Smlaier return; 2636126258Smlaier switch (s->af) { 2637126258Smlaier#ifdef INET 2638126258Smlaier case AF_INET: 2639130613Smlaier pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL, 2640130613Smlaier &s->nat_src_node); 2641130613Smlaier s->rt_kif = r->rpool.cur->kif; 2642126258Smlaier break; 2643126258Smlaier#endif /* INET */ 2644126258Smlaier#ifdef INET6 2645126258Smlaier case AF_INET6: 2646130613Smlaier pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL, 2647130613Smlaier &s->nat_src_node); 2648130613Smlaier s->rt_kif = r->rpool.cur->kif; 2649126258Smlaier break; 2650126258Smlaier#endif /* INET6 */ 2651126258Smlaier } 2652126258Smlaier} 2653126258Smlaier 2654126258Smlaierint 2655126258Smlaierpf_test_tcp(struct pf_rule **rm, struct pf_state **sm, int direction, 2656130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 2657126258Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm) 2658126258Smlaier{ 2659130613Smlaier struct pf_rule *nr = NULL; 2660126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 2661126258Smlaier struct tcphdr *th = pd->hdr.tcp; 2662126258Smlaier u_int16_t bport, nport = 0; 2663126258Smlaier sa_family_t af = pd->af; 2664126258Smlaier int lookup = -1; 2665126258Smlaier uid_t uid; 2666126258Smlaier gid_t gid; 2667126258Smlaier struct pf_rule *r, *a = NULL; 2668126258Smlaier struct pf_ruleset *ruleset = NULL; 2669130613Smlaier struct pf_src_node *nsn = NULL; 2670126258Smlaier u_short reason; 2671126258Smlaier int rewrite = 0; 2672126258Smlaier struct pf_tag *pftag = NULL; 2673126258Smlaier int tag = -1; 2674126258Smlaier u_int16_t mss = tcp_mssdflt; 2675126258Smlaier 2676126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 2677126258Smlaier 2678126258Smlaier if (direction == PF_OUT) { 2679126258Smlaier bport = nport = th->th_sport; 2680126258Smlaier /* check outgoing packet for BINAT/NAT */ 2681130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 2682126258Smlaier saddr, th->th_sport, daddr, th->th_dport, 2683130613Smlaier &pd->naddr, &nport)) != NULL) { 2684130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 2685126258Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 2686130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 2687126258Smlaier rewrite++; 2688130613Smlaier if (nr->natpass) 2689126258Smlaier r = NULL; 2690130613Smlaier pd->nat_rule = nr; 2691126258Smlaier } 2692126258Smlaier } else { 2693126258Smlaier bport = nport = th->th_dport; 2694126258Smlaier /* check incoming packet for BINAT/RDR */ 2695130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 2696130613Smlaier saddr, th->th_sport, daddr, th->th_dport, 2697130613Smlaier &pd->naddr, &nport)) != NULL) { 2698130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 2699126258Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 2700130613Smlaier &th->th_sum, &pd->naddr, nport, 0, af); 2701126258Smlaier rewrite++; 2702130613Smlaier if (nr->natpass) 2703126258Smlaier r = NULL; 2704130613Smlaier pd->nat_rule = nr; 2705126258Smlaier } 2706126258Smlaier } 2707126258Smlaier 2708126258Smlaier while (r != NULL) { 2709126258Smlaier r->evaluations++; 2710130613Smlaier if (r->kif != NULL && 2711130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 2712126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 2713126258Smlaier else if (r->direction && r->direction != direction) 2714126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 2715126258Smlaier else if (r->af && r->af != af) 2716126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 2717126258Smlaier else if (r->proto && r->proto != IPPROTO_TCP) 2718126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 2719126258Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not)) 2720126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 2721126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 2722126258Smlaier r->src.port[0], r->src.port[1], th->th_sport)) 2723126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 2724126258Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not)) 2725126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 2726126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 2727126258Smlaier r->dst.port[0], r->dst.port[1], th->th_dport)) 2728126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 2729126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 2730126258Smlaier r = TAILQ_NEXT(r, entries); 2731126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 2732126258Smlaier r = TAILQ_NEXT(r, entries); 2733126258Smlaier else if ((r->flagset & th->th_flags) != r->flags) 2734126258Smlaier r = TAILQ_NEXT(r, entries); 2735126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 2736130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 2737126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 2738126258Smlaier uid)) 2739126258Smlaier r = TAILQ_NEXT(r, entries); 2740126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 2741130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 2742126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 2743126258Smlaier gid)) 2744126258Smlaier r = TAILQ_NEXT(r, entries); 2745130613Smlaier else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag)) 2746126258Smlaier r = TAILQ_NEXT(r, entries); 2747126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 2748126258Smlaier r = TAILQ_NEXT(r, entries); 2749126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY && !pf_osfp_match( 2750126258Smlaier pf_osfp_fingerprint(pd, m, off, th), r->os_fingerprint)) 2751126258Smlaier r = TAILQ_NEXT(r, entries); 2752126258Smlaier else { 2753126258Smlaier if (r->tag) 2754126258Smlaier tag = r->tag; 2755126258Smlaier if (r->anchor == NULL) { 2756126258Smlaier *rm = r; 2757126258Smlaier *am = a; 2758126258Smlaier *rsm = ruleset; 2759126258Smlaier if ((*rm)->quick) 2760126258Smlaier break; 2761126258Smlaier r = TAILQ_NEXT(r, entries); 2762126258Smlaier } else 2763126258Smlaier PF_STEP_INTO_ANCHOR(r, a, ruleset, 2764126258Smlaier PF_RULESET_FILTER); 2765126258Smlaier } 2766126258Smlaier if (r == NULL && a != NULL) 2767126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, a, ruleset, 2768126258Smlaier PF_RULESET_FILTER); 2769126258Smlaier } 2770126258Smlaier r = *rm; 2771126258Smlaier a = *am; 2772126258Smlaier ruleset = *rsm; 2773126258Smlaier 2774126258Smlaier REASON_SET(&reason, PFRES_MATCH); 2775126258Smlaier 2776126258Smlaier if (r->log) { 2777126258Smlaier if (rewrite) 2778126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 2779130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 2780126258Smlaier } 2781126258Smlaier 2782126258Smlaier if ((r->action == PF_DROP) && 2783126258Smlaier ((r->rule_flag & PFRULE_RETURNRST) || 2784126258Smlaier (r->rule_flag & PFRULE_RETURNICMP) || 2785126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 2786126258Smlaier /* undo NAT changes, if they have taken place */ 2787130613Smlaier if (nr != NULL) { 2788130613Smlaier if (direction == PF_OUT) { 2789130613Smlaier pf_change_ap(saddr, &th->th_sport, pd->ip_sum, 2790130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 2791130613Smlaier rewrite++; 2792130613Smlaier } else { 2793130613Smlaier pf_change_ap(daddr, &th->th_dport, pd->ip_sum, 2794130613Smlaier &th->th_sum, &pd->baddr, bport, 0, af); 2795130613Smlaier rewrite++; 2796130613Smlaier } 2797126258Smlaier } 2798126258Smlaier if (((r->rule_flag & PFRULE_RETURNRST) || 2799126258Smlaier (r->rule_flag & PFRULE_RETURN)) && 2800126258Smlaier !(th->th_flags & TH_RST)) { 2801126258Smlaier u_int32_t ack = ntohl(th->th_seq) + pd->p_len; 2802126258Smlaier 2803126258Smlaier if (th->th_flags & TH_SYN) 2804126258Smlaier ack++; 2805126258Smlaier if (th->th_flags & TH_FIN) 2806126258Smlaier ack++; 2807126258Smlaier pf_send_tcp(r, af, pd->dst, 2808126258Smlaier pd->src, th->th_dport, th->th_sport, 2809126258Smlaier ntohl(th->th_ack), ack, TH_RST|TH_ACK, 0, 0, 2810126258Smlaier r->return_ttl); 2811126258Smlaier } else if ((af == AF_INET) && r->return_icmp) 2812126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 2813126258Smlaier r->return_icmp & 255, af, r); 2814126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 2815126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 2816126258Smlaier r->return_icmp6 & 255, af, r); 2817126258Smlaier } 2818126258Smlaier 2819126258Smlaier if (r->action == PF_DROP) 2820126258Smlaier return (PF_DROP); 2821126258Smlaier 2822126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 2823126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 2824126258Smlaier return (PF_DROP); 2825126258Smlaier } 2826126258Smlaier 2827130613Smlaier if (r->keep_state || nr != NULL || 2828126258Smlaier (pd->flags & PFDESC_TCP_NORM)) { 2829126258Smlaier /* create new state */ 2830126258Smlaier u_int16_t len; 2831126258Smlaier struct pf_state *s = NULL; 2832130613Smlaier struct pf_src_node *sn = NULL; 2833126258Smlaier 2834126258Smlaier len = pd->tot_len - off - (th->th_off << 2); 2835130613Smlaier 2836130613Smlaier /* check maximums */ 2837130613Smlaier if (r->max_states && (r->states >= r->max_states)) 2838130613Smlaier goto cleanup; 2839130613Smlaier /* src node for flter rule */ 2840130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 2841130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 2842130613Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) 2843130613Smlaier goto cleanup; 2844130613Smlaier /* src node for translation rule */ 2845130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 2846130613Smlaier ((direction == PF_OUT && 2847130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 2848130613Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) 2849130613Smlaier goto cleanup; 2850130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 2851126258Smlaier if (s == NULL) { 2852130613Smlaiercleanup: 2853130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 2854130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 2855130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 2856130613Smlaier pf_status.src_nodes--; 2857130613Smlaier pool_put(&pf_src_tree_pl, sn); 2858130613Smlaier } 2859130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 2860130613Smlaier nsn->expire == 0) { 2861130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 2862130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 2863130613Smlaier pf_status.src_nodes--; 2864130613Smlaier pool_put(&pf_src_tree_pl, nsn); 2865130613Smlaier } 2866126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 2867126258Smlaier return (PF_DROP); 2868126258Smlaier } 2869126258Smlaier bzero(s, sizeof(*s)); 2870126258Smlaier r->states++; 2871126258Smlaier if (a != NULL) 2872126258Smlaier a->states++; 2873126258Smlaier s->rule.ptr = r; 2874130613Smlaier s->nat_rule.ptr = nr; 2875126258Smlaier if (s->nat_rule.ptr != NULL) 2876126258Smlaier s->nat_rule.ptr->states++; 2877126258Smlaier s->anchor.ptr = a; 2878126258Smlaier s->allow_opts = r->allow_opts; 2879126258Smlaier s->log = r->log & 2; 2880126258Smlaier s->proto = IPPROTO_TCP; 2881126258Smlaier s->direction = direction; 2882126258Smlaier s->af = af; 2883126258Smlaier if (direction == PF_OUT) { 2884126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 2885126258Smlaier s->gwy.port = th->th_sport; /* sport */ 2886126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 2887126258Smlaier s->ext.port = th->th_dport; 2888130613Smlaier if (nr != NULL) { 2889130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 2890126258Smlaier s->lan.port = bport; 2891126258Smlaier } else { 2892126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 2893126258Smlaier s->lan.port = s->gwy.port; 2894126258Smlaier } 2895126258Smlaier } else { 2896126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 2897126258Smlaier s->lan.port = th->th_dport; 2898126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 2899126258Smlaier s->ext.port = th->th_sport; 2900130613Smlaier if (nr != NULL) { 2901130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 2902126258Smlaier s->gwy.port = bport; 2903126258Smlaier } else { 2904126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 2905126258Smlaier s->gwy.port = s->lan.port; 2906126258Smlaier } 2907126258Smlaier } 2908126258Smlaier 2909126258Smlaier s->src.seqlo = ntohl(th->th_seq); 2910126258Smlaier s->src.seqhi = s->src.seqlo + len + 1; 2911126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 2912126258Smlaier r->keep_state == PF_STATE_MODULATE) { 2913126258Smlaier /* Generate sequence number modulator */ 2914126258Smlaier while ((s->src.seqdiff = arc4random()) == 0) 2915126258Smlaier ; 2916126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, 2917126258Smlaier htonl(s->src.seqlo + s->src.seqdiff), 0); 2918126258Smlaier rewrite = 1; 2919126258Smlaier } else 2920126258Smlaier s->src.seqdiff = 0; 2921126258Smlaier if (th->th_flags & TH_SYN) { 2922126258Smlaier s->src.seqhi++; 2923126258Smlaier s->src.wscale = pf_get_wscale(m, off, th->th_off, af); 2924126258Smlaier } 2925126258Smlaier s->src.max_win = MAX(ntohs(th->th_win), 1); 2926126258Smlaier if (s->src.wscale & PF_WSCALE_MASK) { 2927126258Smlaier /* Remove scale factor from initial window */ 2928126258Smlaier int win = s->src.max_win; 2929126258Smlaier win += 1 << (s->src.wscale & PF_WSCALE_MASK); 2930126258Smlaier s->src.max_win = (win - 1) >> 2931126258Smlaier (s->src.wscale & PF_WSCALE_MASK); 2932126258Smlaier } 2933126258Smlaier if (th->th_flags & TH_FIN) 2934126258Smlaier s->src.seqhi++; 2935126258Smlaier s->dst.seqhi = 1; 2936126258Smlaier s->dst.max_win = 1; 2937126258Smlaier s->src.state = TCPS_SYN_SENT; 2938126258Smlaier s->dst.state = TCPS_CLOSED; 2939127145Smlaier#ifdef __FreeBSD__ 2940126261Smlaier s->creation = time_second; 2941126261Smlaier s->expire = time_second; 2942126261Smlaier#else 2943126258Smlaier s->creation = time.tv_sec; 2944126258Smlaier s->expire = time.tv_sec; 2945126261Smlaier#endif 2946126258Smlaier s->timeout = PFTM_TCP_FIRST_PACKET; 2947126258Smlaier pf_set_rt_ifp(s, saddr); 2948130613Smlaier if (sn != NULL) { 2949130613Smlaier s->src_node = sn; 2950130613Smlaier s->src_node->states++; 2951130613Smlaier } 2952130613Smlaier if (nsn != NULL) { 2953130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 2954130613Smlaier s->nat_src_node = nsn; 2955130613Smlaier s->nat_src_node->states++; 2956130613Smlaier } 2957126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && pf_normalize_tcp_init(m, 2958126258Smlaier off, pd, th, &s->src, &s->dst)) { 2959126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 2960130613Smlaier pf_src_tree_remove_state(s); 2961126258Smlaier pool_put(&pf_state_pl, s); 2962126258Smlaier return (PF_DROP); 2963126258Smlaier } 2964126258Smlaier if ((pd->flags & PFDESC_TCP_NORM) && s->src.scrub && 2965126258Smlaier pf_normalize_tcp_stateful(m, off, pd, &reason, th, &s->src, 2966126258Smlaier &s->dst, &rewrite)) { 2967126258Smlaier pf_normalize_tcp_cleanup(s); 2968130613Smlaier pf_src_tree_remove_state(s); 2969126258Smlaier pool_put(&pf_state_pl, s); 2970126258Smlaier return (PF_DROP); 2971126258Smlaier } 2972130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 2973126258Smlaier pf_normalize_tcp_cleanup(s); 2974126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 2975130613Smlaier pf_src_tree_remove_state(s); 2976126258Smlaier pool_put(&pf_state_pl, s); 2977126258Smlaier return (PF_DROP); 2978126258Smlaier } else 2979126258Smlaier *sm = s; 2980126258Smlaier if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN && 2981126258Smlaier r->keep_state == PF_STATE_SYNPROXY) { 2982126258Smlaier s->src.state = PF_TCPS_PROXY_SRC; 2983130613Smlaier if (nr != NULL) { 2984130613Smlaier if (direction == PF_OUT) { 2985130613Smlaier pf_change_ap(saddr, &th->th_sport, 2986130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 2987130613Smlaier bport, 0, af); 2988130613Smlaier } else { 2989130613Smlaier pf_change_ap(daddr, &th->th_dport, 2990130613Smlaier pd->ip_sum, &th->th_sum, &pd->baddr, 2991130613Smlaier bport, 0, af); 2992130613Smlaier } 2993130613Smlaier } 2994126258Smlaier s->src.seqhi = arc4random(); 2995126258Smlaier /* Find mss option */ 2996126258Smlaier mss = pf_get_mss(m, off, th->th_off, af); 2997126258Smlaier mss = pf_calc_mss(saddr, af, mss); 2998126258Smlaier mss = pf_calc_mss(daddr, af, mss); 2999126258Smlaier s->src.mss = mss; 3000126258Smlaier pf_send_tcp(r, af, daddr, saddr, th->th_dport, 3001130613Smlaier th->th_sport, s->src.seqhi, ntohl(th->th_seq) + 1, 3002130613Smlaier TH_SYN|TH_ACK, 0, s->src.mss, 0); 3003126258Smlaier return (PF_SYNPROXY_DROP); 3004126258Smlaier } 3005126258Smlaier } 3006126258Smlaier 3007126258Smlaier /* copy back packet headers if we performed NAT operations */ 3008126258Smlaier if (rewrite) 3009126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 3010126258Smlaier 3011126258Smlaier return (PF_PASS); 3012126258Smlaier} 3013126258Smlaier 3014126258Smlaierint 3015126258Smlaierpf_test_udp(struct pf_rule **rm, struct pf_state **sm, int direction, 3016130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3017126258Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm) 3018126258Smlaier{ 3019130613Smlaier struct pf_rule *nr = NULL; 3020126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3021126258Smlaier struct udphdr *uh = pd->hdr.udp; 3022126258Smlaier u_int16_t bport, nport = 0; 3023126258Smlaier sa_family_t af = pd->af; 3024126258Smlaier int lookup = -1; 3025126258Smlaier uid_t uid; 3026126258Smlaier gid_t gid; 3027126258Smlaier struct pf_rule *r, *a = NULL; 3028126258Smlaier struct pf_ruleset *ruleset = NULL; 3029130613Smlaier struct pf_src_node *nsn = NULL; 3030126258Smlaier u_short reason; 3031126258Smlaier int rewrite = 0; 3032126258Smlaier struct pf_tag *pftag = NULL; 3033126258Smlaier int tag = -1; 3034126258Smlaier 3035126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3036126258Smlaier 3037126258Smlaier if (direction == PF_OUT) { 3038126258Smlaier bport = nport = uh->uh_sport; 3039126258Smlaier /* check outgoing packet for BINAT/NAT */ 3040130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3041126258Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, 3042130613Smlaier &pd->naddr, &nport)) != NULL) { 3043130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3044126258Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3045130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3046126258Smlaier rewrite++; 3047130613Smlaier if (nr->natpass) 3048126258Smlaier r = NULL; 3049130613Smlaier pd->nat_rule = nr; 3050126258Smlaier } 3051126258Smlaier } else { 3052126258Smlaier bport = nport = uh->uh_dport; 3053126258Smlaier /* check incoming packet for BINAT/RDR */ 3054130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3055130613Smlaier saddr, uh->uh_sport, daddr, uh->uh_dport, &pd->naddr, 3056130613Smlaier &nport)) != NULL) { 3057130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3058126258Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3059130613Smlaier &uh->uh_sum, &pd->naddr, nport, 1, af); 3060126258Smlaier rewrite++; 3061130613Smlaier if (nr->natpass) 3062126258Smlaier r = NULL; 3063130613Smlaier pd->nat_rule = nr; 3064126258Smlaier } 3065126258Smlaier } 3066126258Smlaier 3067126258Smlaier while (r != NULL) { 3068126258Smlaier r->evaluations++; 3069130613Smlaier if (r->kif != NULL && 3070130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3071126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3072126258Smlaier else if (r->direction && r->direction != direction) 3073126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3074126258Smlaier else if (r->af && r->af != af) 3075126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3076126258Smlaier else if (r->proto && r->proto != IPPROTO_UDP) 3077126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3078126258Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not)) 3079126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3080126258Smlaier else if (r->src.port_op && !pf_match_port(r->src.port_op, 3081126258Smlaier r->src.port[0], r->src.port[1], uh->uh_sport)) 3082126258Smlaier r = r->skip[PF_SKIP_SRC_PORT].ptr; 3083126258Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not)) 3084126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3085126258Smlaier else if (r->dst.port_op && !pf_match_port(r->dst.port_op, 3086126258Smlaier r->dst.port[0], r->dst.port[1], uh->uh_dport)) 3087126258Smlaier r = r->skip[PF_SKIP_DST_PORT].ptr; 3088126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3089126258Smlaier r = TAILQ_NEXT(r, entries); 3090126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3091126258Smlaier r = TAILQ_NEXT(r, entries); 3092126258Smlaier else if (r->uid.op && (lookup != -1 || (lookup = 3093130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3094126258Smlaier !pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1], 3095126258Smlaier uid)) 3096126258Smlaier r = TAILQ_NEXT(r, entries); 3097126258Smlaier else if (r->gid.op && (lookup != -1 || (lookup = 3098130613Smlaier pf_socket_lookup(&uid, &gid, direction, pd), 1)) && 3099126258Smlaier !pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1], 3100126258Smlaier gid)) 3101126258Smlaier r = TAILQ_NEXT(r, entries); 3102130613Smlaier else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag)) 3103126258Smlaier r = TAILQ_NEXT(r, entries); 3104126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 3105126258Smlaier r = TAILQ_NEXT(r, entries); 3106126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3107126258Smlaier r = TAILQ_NEXT(r, entries); 3108126258Smlaier else { 3109126258Smlaier if (r->tag) 3110126258Smlaier tag = r->tag; 3111126258Smlaier if (r->anchor == NULL) { 3112126258Smlaier *rm = r; 3113126258Smlaier *am = a; 3114126258Smlaier *rsm = ruleset; 3115126258Smlaier if ((*rm)->quick) 3116126258Smlaier break; 3117126258Smlaier r = TAILQ_NEXT(r, entries); 3118126258Smlaier } else 3119126258Smlaier PF_STEP_INTO_ANCHOR(r, a, ruleset, 3120126258Smlaier PF_RULESET_FILTER); 3121126258Smlaier } 3122126258Smlaier if (r == NULL && a != NULL) 3123126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, a, ruleset, 3124126258Smlaier PF_RULESET_FILTER); 3125126258Smlaier } 3126126258Smlaier r = *rm; 3127126258Smlaier a = *am; 3128126258Smlaier ruleset = *rsm; 3129126258Smlaier 3130126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3131126258Smlaier 3132126258Smlaier if (r->log) { 3133126258Smlaier if (rewrite) 3134126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3135130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3136126258Smlaier } 3137126258Smlaier 3138126258Smlaier if ((r->action == PF_DROP) && 3139126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 3140126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3141126258Smlaier /* undo NAT changes, if they have taken place */ 3142130613Smlaier if (nr != NULL) { 3143130613Smlaier if (direction == PF_OUT) { 3144130613Smlaier pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum, 3145130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3146130613Smlaier rewrite++; 3147130613Smlaier } else { 3148130613Smlaier pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum, 3149130613Smlaier &uh->uh_sum, &pd->baddr, bport, 1, af); 3150130613Smlaier rewrite++; 3151130613Smlaier } 3152126258Smlaier } 3153126258Smlaier if ((af == AF_INET) && r->return_icmp) 3154126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3155126258Smlaier r->return_icmp & 255, af, r); 3156126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3157126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3158126258Smlaier r->return_icmp6 & 255, af, r); 3159126258Smlaier } 3160126258Smlaier 3161126258Smlaier if (r->action == PF_DROP) 3162126258Smlaier return (PF_DROP); 3163126258Smlaier 3164126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3165126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3166126258Smlaier return (PF_DROP); 3167126258Smlaier } 3168126258Smlaier 3169130613Smlaier if (r->keep_state || nr != NULL) { 3170126258Smlaier /* create new state */ 3171126258Smlaier struct pf_state *s = NULL; 3172130613Smlaier struct pf_src_node *sn = NULL; 3173126258Smlaier 3174130613Smlaier /* check maximums */ 3175130613Smlaier if (r->max_states && (r->states >= r->max_states)) 3176130613Smlaier goto cleanup; 3177130613Smlaier /* src node for flter rule */ 3178130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3179130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3180130613Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) 3181130613Smlaier goto cleanup; 3182130613Smlaier /* src node for translation rule */ 3183130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3184130613Smlaier ((direction == PF_OUT && 3185130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3186130613Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) 3187130613Smlaier goto cleanup; 3188130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3189126258Smlaier if (s == NULL) { 3190130613Smlaiercleanup: 3191130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3192130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3193130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3194130613Smlaier pf_status.src_nodes--; 3195130613Smlaier pool_put(&pf_src_tree_pl, sn); 3196130613Smlaier } 3197130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3198130613Smlaier nsn->expire == 0) { 3199130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3200130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3201130613Smlaier pf_status.src_nodes--; 3202130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3203130613Smlaier } 3204126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3205126258Smlaier return (PF_DROP); 3206126258Smlaier } 3207126258Smlaier bzero(s, sizeof(*s)); 3208126258Smlaier r->states++; 3209126258Smlaier if (a != NULL) 3210126258Smlaier a->states++; 3211126258Smlaier s->rule.ptr = r; 3212130613Smlaier s->nat_rule.ptr = nr; 3213126258Smlaier if (s->nat_rule.ptr != NULL) 3214126258Smlaier s->nat_rule.ptr->states++; 3215126258Smlaier s->anchor.ptr = a; 3216126258Smlaier s->allow_opts = r->allow_opts; 3217126258Smlaier s->log = r->log & 2; 3218126258Smlaier s->proto = IPPROTO_UDP; 3219126258Smlaier s->direction = direction; 3220126258Smlaier s->af = af; 3221126258Smlaier if (direction == PF_OUT) { 3222126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3223126258Smlaier s->gwy.port = uh->uh_sport; 3224126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3225126258Smlaier s->ext.port = uh->uh_dport; 3226130613Smlaier if (nr != NULL) { 3227130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3228126258Smlaier s->lan.port = bport; 3229126258Smlaier } else { 3230126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3231126258Smlaier s->lan.port = s->gwy.port; 3232126258Smlaier } 3233126258Smlaier } else { 3234126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3235126258Smlaier s->lan.port = uh->uh_dport; 3236126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3237126258Smlaier s->ext.port = uh->uh_sport; 3238130613Smlaier if (nr != NULL) { 3239130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3240126258Smlaier s->gwy.port = bport; 3241126258Smlaier } else { 3242126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3243126258Smlaier s->gwy.port = s->lan.port; 3244126258Smlaier } 3245126258Smlaier } 3246126258Smlaier s->src.state = PFUDPS_SINGLE; 3247126258Smlaier s->dst.state = PFUDPS_NO_TRAFFIC; 3248127145Smlaier#ifdef __FreeBSD__ 3249126261Smlaier s->creation = time_second; 3250126261Smlaier s->expire = time_second; 3251126261Smlaier#else 3252126258Smlaier s->creation = time.tv_sec; 3253126258Smlaier s->expire = time.tv_sec; 3254126261Smlaier#endif 3255126258Smlaier s->timeout = PFTM_UDP_FIRST_PACKET; 3256126258Smlaier pf_set_rt_ifp(s, saddr); 3257130613Smlaier if (sn != NULL) { 3258130613Smlaier s->src_node = sn; 3259130613Smlaier s->src_node->states++; 3260130613Smlaier } 3261130613Smlaier if (nsn != NULL) { 3262130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3263130613Smlaier s->nat_src_node = nsn; 3264130613Smlaier s->nat_src_node->states++; 3265130613Smlaier } 3266130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3267126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3268130613Smlaier pf_src_tree_remove_state(s); 3269126258Smlaier pool_put(&pf_state_pl, s); 3270126258Smlaier return (PF_DROP); 3271126258Smlaier } else 3272126258Smlaier *sm = s; 3273126258Smlaier } 3274126258Smlaier 3275126258Smlaier /* copy back packet headers if we performed NAT operations */ 3276126258Smlaier if (rewrite) 3277126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 3278126258Smlaier 3279126258Smlaier return (PF_PASS); 3280126258Smlaier} 3281126258Smlaier 3282126258Smlaierint 3283126258Smlaierpf_test_icmp(struct pf_rule **rm, struct pf_state **sm, int direction, 3284130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, 3285126258Smlaier struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm) 3286126258Smlaier{ 3287130613Smlaier struct pf_rule *nr = NULL; 3288126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3289126258Smlaier struct pf_rule *r, *a = NULL; 3290126258Smlaier struct pf_ruleset *ruleset = NULL; 3291130613Smlaier struct pf_src_node *nsn = NULL; 3292126258Smlaier u_short reason; 3293127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 3294126258Smlaier sa_family_t af = pd->af; 3295127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 3296127629Smlaier u_int8_t icmpcode = 0; /* make the compiler happy */ 3297126258Smlaier int state_icmp = 0; 3298126258Smlaier struct pf_tag *pftag = NULL; 3299126258Smlaier int tag = -1; 3300126258Smlaier#ifdef INET6 3301126258Smlaier int rewrite = 0; 3302126258Smlaier#endif /* INET6 */ 3303126258Smlaier 3304126258Smlaier switch (pd->proto) { 3305126258Smlaier#ifdef INET 3306126258Smlaier case IPPROTO_ICMP: 3307126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 3308126258Smlaier icmpcode = pd->hdr.icmp->icmp_code; 3309126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 3310126258Smlaier 3311126258Smlaier if (icmptype == ICMP_UNREACH || 3312126258Smlaier icmptype == ICMP_SOURCEQUENCH || 3313126258Smlaier icmptype == ICMP_REDIRECT || 3314126258Smlaier icmptype == ICMP_TIMXCEED || 3315126258Smlaier icmptype == ICMP_PARAMPROB) 3316126258Smlaier state_icmp++; 3317126258Smlaier break; 3318126258Smlaier#endif /* INET */ 3319126258Smlaier#ifdef INET6 3320126258Smlaier case IPPROTO_ICMPV6: 3321126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 3322126258Smlaier icmpcode = pd->hdr.icmp6->icmp6_code; 3323126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 3324126258Smlaier 3325126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 3326126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 3327126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 3328126258Smlaier icmptype == ICMP6_PARAM_PROB) 3329126258Smlaier state_icmp++; 3330126258Smlaier break; 3331126258Smlaier#endif /* INET6 */ 3332126258Smlaier } 3333126258Smlaier 3334126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3335126258Smlaier 3336126258Smlaier if (direction == PF_OUT) { 3337126258Smlaier /* check outgoing packet for BINAT/NAT */ 3338130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3339130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3340130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3341126258Smlaier switch (af) { 3342126258Smlaier#ifdef INET 3343126258Smlaier case AF_INET: 3344126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 3345130613Smlaier pd->naddr.v4.s_addr, 0); 3346126258Smlaier break; 3347126258Smlaier#endif /* INET */ 3348126258Smlaier#ifdef INET6 3349126258Smlaier case AF_INET6: 3350126258Smlaier pf_change_a6(saddr, &pd->hdr.icmp6->icmp6_cksum, 3351130613Smlaier &pd->naddr, 0); 3352126258Smlaier rewrite++; 3353126258Smlaier break; 3354126258Smlaier#endif /* INET6 */ 3355126258Smlaier } 3356130613Smlaier if (nr->natpass) 3357126258Smlaier r = NULL; 3358130613Smlaier pd->nat_rule = nr; 3359126258Smlaier } 3360126258Smlaier } else { 3361126258Smlaier /* check incoming packet for BINAT/RDR */ 3362130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3363130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3364130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3365126258Smlaier switch (af) { 3366126258Smlaier#ifdef INET 3367126258Smlaier case AF_INET: 3368126258Smlaier pf_change_a(&daddr->v4.s_addr, 3369130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 3370126258Smlaier break; 3371126258Smlaier#endif /* INET */ 3372126258Smlaier#ifdef INET6 3373126258Smlaier case AF_INET6: 3374126258Smlaier pf_change_a6(daddr, &pd->hdr.icmp6->icmp6_cksum, 3375130613Smlaier &pd->naddr, 0); 3376126258Smlaier rewrite++; 3377126258Smlaier break; 3378126258Smlaier#endif /* INET6 */ 3379126258Smlaier } 3380130613Smlaier if (nr->natpass) 3381126258Smlaier r = NULL; 3382130613Smlaier pd->nat_rule = nr; 3383126258Smlaier } 3384126258Smlaier } 3385126258Smlaier 3386126258Smlaier while (r != NULL) { 3387126258Smlaier r->evaluations++; 3388130613Smlaier if (r->kif != NULL && 3389130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3390126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3391126258Smlaier else if (r->direction && r->direction != direction) 3392126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3393126258Smlaier else if (r->af && r->af != af) 3394126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3395126258Smlaier else if (r->proto && r->proto != pd->proto) 3396126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3397126258Smlaier else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not)) 3398126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3399126258Smlaier else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not)) 3400126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3401126258Smlaier else if (r->type && r->type != icmptype + 1) 3402126258Smlaier r = TAILQ_NEXT(r, entries); 3403126258Smlaier else if (r->code && r->code != icmpcode + 1) 3404126258Smlaier r = TAILQ_NEXT(r, entries); 3405126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3406126258Smlaier r = TAILQ_NEXT(r, entries); 3407126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3408126258Smlaier r = TAILQ_NEXT(r, entries); 3409130613Smlaier else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag)) 3410126258Smlaier r = TAILQ_NEXT(r, entries); 3411126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 3412126258Smlaier r = TAILQ_NEXT(r, entries); 3413126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3414126258Smlaier r = TAILQ_NEXT(r, entries); 3415126258Smlaier else { 3416126258Smlaier if (r->tag) 3417126258Smlaier tag = r->tag; 3418126258Smlaier if (r->anchor == NULL) { 3419126258Smlaier *rm = r; 3420126258Smlaier *am = a; 3421126258Smlaier *rsm = ruleset; 3422126258Smlaier if ((*rm)->quick) 3423126258Smlaier break; 3424126258Smlaier r = TAILQ_NEXT(r, entries); 3425126258Smlaier } else 3426126258Smlaier PF_STEP_INTO_ANCHOR(r, a, ruleset, 3427126258Smlaier PF_RULESET_FILTER); 3428126258Smlaier } 3429126258Smlaier if (r == NULL && a != NULL) 3430126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, a, ruleset, 3431126258Smlaier PF_RULESET_FILTER); 3432126258Smlaier } 3433126258Smlaier r = *rm; 3434126258Smlaier a = *am; 3435126258Smlaier ruleset = *rsm; 3436126258Smlaier 3437126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3438126258Smlaier 3439126258Smlaier if (r->log) { 3440126258Smlaier#ifdef INET6 3441126258Smlaier if (rewrite) 3442126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3443126261Smlaier (caddr_t)pd->hdr.icmp6); 3444126258Smlaier#endif /* INET6 */ 3445130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3446126258Smlaier } 3447126258Smlaier 3448126258Smlaier if (r->action != PF_PASS) 3449126258Smlaier return (PF_DROP); 3450126258Smlaier 3451126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3452126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3453126258Smlaier return (PF_DROP); 3454126258Smlaier } 3455126258Smlaier 3456130613Smlaier if (!state_icmp && (r->keep_state || nr != NULL)) { 3457126258Smlaier /* create new state */ 3458126258Smlaier struct pf_state *s = NULL; 3459130613Smlaier struct pf_src_node *sn = NULL; 3460126258Smlaier 3461130613Smlaier /* check maximums */ 3462130613Smlaier if (r->max_states && (r->states >= r->max_states)) 3463130613Smlaier goto cleanup; 3464130613Smlaier /* src node for flter rule */ 3465130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3466130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3467130613Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) 3468130613Smlaier goto cleanup; 3469130613Smlaier /* src node for translation rule */ 3470130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3471130613Smlaier ((direction == PF_OUT && 3472130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3473130613Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) 3474130613Smlaier goto cleanup; 3475130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3476126258Smlaier if (s == NULL) { 3477130613Smlaiercleanup: 3478130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3479130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3480130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3481130613Smlaier pf_status.src_nodes--; 3482130613Smlaier pool_put(&pf_src_tree_pl, sn); 3483130613Smlaier } 3484130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3485130613Smlaier nsn->expire == 0) { 3486130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3487130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3488130613Smlaier pf_status.src_nodes--; 3489130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3490130613Smlaier } 3491126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3492126258Smlaier return (PF_DROP); 3493126258Smlaier } 3494126258Smlaier bzero(s, sizeof(*s)); 3495126258Smlaier r->states++; 3496126258Smlaier if (a != NULL) 3497126258Smlaier a->states++; 3498126258Smlaier s->rule.ptr = r; 3499130613Smlaier s->nat_rule.ptr = nr; 3500126258Smlaier if (s->nat_rule.ptr != NULL) 3501126258Smlaier s->nat_rule.ptr->states++; 3502126258Smlaier s->anchor.ptr = a; 3503126258Smlaier s->allow_opts = r->allow_opts; 3504126258Smlaier s->log = r->log & 2; 3505126258Smlaier s->proto = pd->proto; 3506126258Smlaier s->direction = direction; 3507126258Smlaier s->af = af; 3508126258Smlaier if (direction == PF_OUT) { 3509126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3510126258Smlaier s->gwy.port = icmpid; 3511126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3512126258Smlaier s->ext.port = icmpid; 3513130613Smlaier if (nr != NULL) 3514130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3515126258Smlaier else 3516126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3517126258Smlaier s->lan.port = icmpid; 3518126258Smlaier } else { 3519126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3520126258Smlaier s->lan.port = icmpid; 3521126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3522126258Smlaier s->ext.port = icmpid; 3523130613Smlaier if (nr != NULL) 3524130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3525126258Smlaier else 3526126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3527126258Smlaier s->gwy.port = icmpid; 3528126258Smlaier } 3529127145Smlaier#ifdef __FreeBSD__ 3530126261Smlaier s->creation = time_second; 3531126261Smlaier s->expire = time_second; 3532126261Smlaier#else 3533126258Smlaier s->creation = time.tv_sec; 3534126258Smlaier s->expire = time.tv_sec; 3535126261Smlaier#endif 3536126258Smlaier s->timeout = PFTM_ICMP_FIRST_PACKET; 3537126258Smlaier pf_set_rt_ifp(s, saddr); 3538130613Smlaier if (sn != NULL) { 3539130613Smlaier s->src_node = sn; 3540130613Smlaier s->src_node->states++; 3541130613Smlaier } 3542130613Smlaier if (nsn != NULL) { 3543130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3544130613Smlaier s->nat_src_node = nsn; 3545130613Smlaier s->nat_src_node->states++; 3546130613Smlaier } 3547130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3548126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3549130613Smlaier pf_src_tree_remove_state(s); 3550126258Smlaier pool_put(&pf_state_pl, s); 3551126258Smlaier return (PF_DROP); 3552126258Smlaier } else 3553126258Smlaier *sm = s; 3554126258Smlaier } 3555126258Smlaier 3556126258Smlaier#ifdef INET6 3557126258Smlaier /* copy back packet headers if we performed IPv6 NAT operations */ 3558126258Smlaier if (rewrite) 3559126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 3560126261Smlaier (caddr_t)pd->hdr.icmp6); 3561126258Smlaier#endif /* INET6 */ 3562126258Smlaier 3563126258Smlaier return (PF_PASS); 3564126258Smlaier} 3565126258Smlaier 3566126258Smlaierint 3567126258Smlaierpf_test_other(struct pf_rule **rm, struct pf_state **sm, int direction, 3568130613Smlaier struct pfi_kif *kif, struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 3569126258Smlaier struct pf_rule **am, struct pf_ruleset **rsm) 3570126258Smlaier{ 3571130613Smlaier struct pf_rule *nr = NULL; 3572126258Smlaier struct pf_rule *r, *a = NULL; 3573126258Smlaier struct pf_ruleset *ruleset = NULL; 3574130613Smlaier struct pf_src_node *nsn = NULL; 3575126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 3576126258Smlaier sa_family_t af = pd->af; 3577126258Smlaier u_short reason; 3578126258Smlaier struct pf_tag *pftag = NULL; 3579126258Smlaier int tag = -1; 3580126258Smlaier 3581126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3582126258Smlaier 3583126258Smlaier if (direction == PF_OUT) { 3584126258Smlaier /* check outgoing packet for BINAT/NAT */ 3585130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn, 3586130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3587130613Smlaier PF_ACPY(&pd->baddr, saddr, af); 3588126258Smlaier switch (af) { 3589126258Smlaier#ifdef INET 3590126258Smlaier case AF_INET: 3591126258Smlaier pf_change_a(&saddr->v4.s_addr, pd->ip_sum, 3592130613Smlaier pd->naddr.v4.s_addr, 0); 3593126258Smlaier break; 3594126258Smlaier#endif /* INET */ 3595126258Smlaier#ifdef INET6 3596126258Smlaier case AF_INET6: 3597130613Smlaier PF_ACPY(saddr, &pd->naddr, af); 3598126258Smlaier break; 3599126258Smlaier#endif /* INET6 */ 3600126258Smlaier } 3601130613Smlaier if (nr->natpass) 3602126258Smlaier r = NULL; 3603130613Smlaier pd->nat_rule = nr; 3604126258Smlaier } 3605126258Smlaier } else { 3606126258Smlaier /* check incoming packet for BINAT/RDR */ 3607130613Smlaier if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn, 3608130613Smlaier saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) { 3609130613Smlaier PF_ACPY(&pd->baddr, daddr, af); 3610126258Smlaier switch (af) { 3611126258Smlaier#ifdef INET 3612126258Smlaier case AF_INET: 3613126258Smlaier pf_change_a(&daddr->v4.s_addr, 3614130613Smlaier pd->ip_sum, pd->naddr.v4.s_addr, 0); 3615126258Smlaier break; 3616126258Smlaier#endif /* INET */ 3617126258Smlaier#ifdef INET6 3618126258Smlaier case AF_INET6: 3619130613Smlaier PF_ACPY(daddr, &pd->naddr, af); 3620126258Smlaier break; 3621126258Smlaier#endif /* INET6 */ 3622126258Smlaier } 3623130613Smlaier if (nr->natpass) 3624126258Smlaier r = NULL; 3625130613Smlaier pd->nat_rule = nr; 3626126258Smlaier } 3627126258Smlaier } 3628126258Smlaier 3629126258Smlaier while (r != NULL) { 3630126258Smlaier r->evaluations++; 3631130613Smlaier if (r->kif != NULL && 3632130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3633126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3634126258Smlaier else if (r->direction && r->direction != direction) 3635126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3636126258Smlaier else if (r->af && r->af != af) 3637126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3638126258Smlaier else if (r->proto && r->proto != pd->proto) 3639126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3640126258Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.not)) 3641126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3642126258Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.not)) 3643126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3644126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3645126258Smlaier r = TAILQ_NEXT(r, entries); 3646126258Smlaier else if (r->rule_flag & PFRULE_FRAGMENT) 3647126258Smlaier r = TAILQ_NEXT(r, entries); 3648130613Smlaier else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag)) 3649126258Smlaier r = TAILQ_NEXT(r, entries); 3650126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 3651126258Smlaier r = TAILQ_NEXT(r, entries); 3652126258Smlaier else if (r->os_fingerprint != PF_OSFP_ANY) 3653126258Smlaier r = TAILQ_NEXT(r, entries); 3654126258Smlaier else { 3655126258Smlaier if (r->tag) 3656126258Smlaier tag = r->tag; 3657126258Smlaier if (r->anchor == NULL) { 3658126258Smlaier *rm = r; 3659126258Smlaier *am = a; 3660126258Smlaier *rsm = ruleset; 3661126258Smlaier if ((*rm)->quick) 3662126258Smlaier break; 3663126258Smlaier r = TAILQ_NEXT(r, entries); 3664126258Smlaier } else 3665126258Smlaier PF_STEP_INTO_ANCHOR(r, a, ruleset, 3666126258Smlaier PF_RULESET_FILTER); 3667126258Smlaier } 3668126258Smlaier if (r == NULL && a != NULL) 3669126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, a, ruleset, 3670126258Smlaier PF_RULESET_FILTER); 3671126258Smlaier } 3672126258Smlaier r = *rm; 3673126258Smlaier a = *am; 3674126258Smlaier ruleset = *rsm; 3675126258Smlaier 3676126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3677130613Smlaier 3678126258Smlaier if (r->log) 3679130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3680126258Smlaier 3681126258Smlaier if ((r->action == PF_DROP) && 3682126258Smlaier ((r->rule_flag & PFRULE_RETURNICMP) || 3683126258Smlaier (r->rule_flag & PFRULE_RETURN))) { 3684126258Smlaier struct pf_addr *a = NULL; 3685126258Smlaier 3686130613Smlaier if (nr != NULL) { 3687130613Smlaier if (direction == PF_OUT) 3688130613Smlaier a = saddr; 3689130613Smlaier else 3690130613Smlaier a = daddr; 3691130613Smlaier } 3692126258Smlaier if (a != NULL) { 3693126258Smlaier switch (af) { 3694126258Smlaier#ifdef INET 3695126258Smlaier case AF_INET: 3696126258Smlaier pf_change_a(&a->v4.s_addr, pd->ip_sum, 3697130613Smlaier pd->baddr.v4.s_addr, 0); 3698126258Smlaier break; 3699126258Smlaier#endif /* INET */ 3700126258Smlaier#ifdef INET6 3701126258Smlaier case AF_INET6: 3702130613Smlaier PF_ACPY(a, &pd->baddr, af); 3703126258Smlaier break; 3704126258Smlaier#endif /* INET6 */ 3705126258Smlaier } 3706126258Smlaier } 3707126258Smlaier if ((af == AF_INET) && r->return_icmp) 3708126258Smlaier pf_send_icmp(m, r->return_icmp >> 8, 3709126258Smlaier r->return_icmp & 255, af, r); 3710126258Smlaier else if ((af == AF_INET6) && r->return_icmp6) 3711126258Smlaier pf_send_icmp(m, r->return_icmp6 >> 8, 3712126258Smlaier r->return_icmp6 & 255, af, r); 3713126258Smlaier } 3714126258Smlaier 3715126258Smlaier if (r->action != PF_PASS) 3716126258Smlaier return (PF_DROP); 3717126258Smlaier 3718126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3719126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3720126258Smlaier return (PF_DROP); 3721126258Smlaier } 3722126258Smlaier 3723130613Smlaier if (r->keep_state || nr != NULL) { 3724126258Smlaier /* create new state */ 3725126258Smlaier struct pf_state *s = NULL; 3726130613Smlaier struct pf_src_node *sn = NULL; 3727126258Smlaier 3728130613Smlaier /* check maximums */ 3729130613Smlaier if (r->max_states && (r->states >= r->max_states)) 3730130613Smlaier goto cleanup; 3731130613Smlaier /* src node for flter rule */ 3732130613Smlaier if ((r->rule_flag & PFRULE_SRCTRACK || 3733130613Smlaier r->rpool.opts & PF_POOL_STICKYADDR) && 3734130613Smlaier pf_insert_src_node(&sn, r, saddr, af) != 0) 3735130613Smlaier goto cleanup; 3736130613Smlaier /* src node for translation rule */ 3737130613Smlaier if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) && 3738130613Smlaier ((direction == PF_OUT && 3739130613Smlaier pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) || 3740130613Smlaier (pf_insert_src_node(&nsn, nr, saddr, af) != 0))) 3741130613Smlaier goto cleanup; 3742130613Smlaier s = pool_get(&pf_state_pl, PR_NOWAIT); 3743126258Smlaier if (s == NULL) { 3744130613Smlaiercleanup: 3745130613Smlaier if (sn != NULL && sn->states == 0 && sn->expire == 0) { 3746130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, sn); 3747130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3748130613Smlaier pf_status.src_nodes--; 3749130613Smlaier pool_put(&pf_src_tree_pl, sn); 3750130613Smlaier } 3751130613Smlaier if (nsn != sn && nsn != NULL && nsn->states == 0 && 3752130613Smlaier nsn->expire == 0) { 3753130613Smlaier RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn); 3754130613Smlaier pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++; 3755130613Smlaier pf_status.src_nodes--; 3756130613Smlaier pool_put(&pf_src_tree_pl, nsn); 3757130613Smlaier } 3758126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3759126258Smlaier return (PF_DROP); 3760126258Smlaier } 3761126258Smlaier bzero(s, sizeof(*s)); 3762126258Smlaier r->states++; 3763126258Smlaier if (a != NULL) 3764126258Smlaier a->states++; 3765126258Smlaier s->rule.ptr = r; 3766130613Smlaier s->nat_rule.ptr = nr; 3767126258Smlaier if (s->nat_rule.ptr != NULL) 3768126258Smlaier s->nat_rule.ptr->states++; 3769126258Smlaier s->anchor.ptr = a; 3770126258Smlaier s->allow_opts = r->allow_opts; 3771126258Smlaier s->log = r->log & 2; 3772126258Smlaier s->proto = pd->proto; 3773126258Smlaier s->direction = direction; 3774126258Smlaier s->af = af; 3775126258Smlaier if (direction == PF_OUT) { 3776126258Smlaier PF_ACPY(&s->gwy.addr, saddr, af); 3777126258Smlaier PF_ACPY(&s->ext.addr, daddr, af); 3778130613Smlaier if (nr != NULL) 3779130613Smlaier PF_ACPY(&s->lan.addr, &pd->baddr, af); 3780126258Smlaier else 3781126258Smlaier PF_ACPY(&s->lan.addr, &s->gwy.addr, af); 3782126258Smlaier } else { 3783126258Smlaier PF_ACPY(&s->lan.addr, daddr, af); 3784126258Smlaier PF_ACPY(&s->ext.addr, saddr, af); 3785130613Smlaier if (nr != NULL) 3786130613Smlaier PF_ACPY(&s->gwy.addr, &pd->baddr, af); 3787126258Smlaier else 3788126258Smlaier PF_ACPY(&s->gwy.addr, &s->lan.addr, af); 3789126258Smlaier } 3790126258Smlaier s->src.state = PFOTHERS_SINGLE; 3791126258Smlaier s->dst.state = PFOTHERS_NO_TRAFFIC; 3792127145Smlaier#ifdef __FreeBSD__ 3793126261Smlaier s->creation = time_second; 3794126261Smlaier s->expire = time_second; 3795126261Smlaier#else 3796126258Smlaier s->creation = time.tv_sec; 3797126258Smlaier s->expire = time.tv_sec; 3798126261Smlaier#endif 3799126258Smlaier s->timeout = PFTM_OTHER_FIRST_PACKET; 3800126258Smlaier pf_set_rt_ifp(s, saddr); 3801130613Smlaier if (sn != NULL) { 3802130613Smlaier s->src_node = sn; 3803130613Smlaier s->src_node->states++; 3804130613Smlaier } 3805130613Smlaier if (nsn != NULL) { 3806130613Smlaier PF_ACPY(&nsn->raddr, &pd->naddr, af); 3807130613Smlaier s->nat_src_node = nsn; 3808130613Smlaier s->nat_src_node->states++; 3809130613Smlaier } 3810130613Smlaier if (pf_insert_state(BOUND_IFACE(r, kif), s)) { 3811126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3812130613Smlaier pf_src_tree_remove_state(s); 3813126258Smlaier pool_put(&pf_state_pl, s); 3814126258Smlaier return (PF_DROP); 3815126258Smlaier } else 3816126258Smlaier *sm = s; 3817126258Smlaier } 3818126258Smlaier 3819126258Smlaier return (PF_PASS); 3820126258Smlaier} 3821126258Smlaier 3822126258Smlaierint 3823130613Smlaierpf_test_fragment(struct pf_rule **rm, int direction, struct pfi_kif *kif, 3824126258Smlaier struct mbuf *m, void *h, struct pf_pdesc *pd, struct pf_rule **am, 3825126258Smlaier struct pf_ruleset **rsm) 3826126258Smlaier{ 3827126258Smlaier struct pf_rule *r, *a = NULL; 3828126258Smlaier struct pf_ruleset *ruleset = NULL; 3829126258Smlaier sa_family_t af = pd->af; 3830126258Smlaier u_short reason; 3831126258Smlaier struct pf_tag *pftag = NULL; 3832126258Smlaier int tag = -1; 3833126258Smlaier 3834126258Smlaier r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr); 3835126258Smlaier while (r != NULL) { 3836126258Smlaier r->evaluations++; 3837130613Smlaier if (r->kif != NULL && 3838130613Smlaier (r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot) 3839126258Smlaier r = r->skip[PF_SKIP_IFP].ptr; 3840126258Smlaier else if (r->direction && r->direction != direction) 3841126258Smlaier r = r->skip[PF_SKIP_DIR].ptr; 3842126258Smlaier else if (r->af && r->af != af) 3843126258Smlaier r = r->skip[PF_SKIP_AF].ptr; 3844126258Smlaier else if (r->proto && r->proto != pd->proto) 3845126258Smlaier r = r->skip[PF_SKIP_PROTO].ptr; 3846126258Smlaier else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.not)) 3847126258Smlaier r = r->skip[PF_SKIP_SRC_ADDR].ptr; 3848126258Smlaier else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.not)) 3849126258Smlaier r = r->skip[PF_SKIP_DST_ADDR].ptr; 3850126258Smlaier else if (r->tos && !(r->tos & pd->tos)) 3851126258Smlaier r = TAILQ_NEXT(r, entries); 3852126258Smlaier else if (r->src.port_op || r->dst.port_op || 3853126258Smlaier r->flagset || r->type || r->code || 3854126258Smlaier r->os_fingerprint != PF_OSFP_ANY) 3855126258Smlaier r = TAILQ_NEXT(r, entries); 3856130613Smlaier else if (r->match_tag && !pf_match_tag(m, r, NULL, pftag, &tag)) 3857126258Smlaier r = TAILQ_NEXT(r, entries); 3858126258Smlaier else if (r->anchorname[0] && r->anchor == NULL) 3859126258Smlaier r = TAILQ_NEXT(r, entries); 3860126258Smlaier else { 3861126258Smlaier if (r->anchor == NULL) { 3862126258Smlaier *rm = r; 3863126258Smlaier *am = a; 3864126258Smlaier *rsm = ruleset; 3865126258Smlaier if ((*rm)->quick) 3866126258Smlaier break; 3867126258Smlaier r = TAILQ_NEXT(r, entries); 3868126258Smlaier } else 3869126258Smlaier PF_STEP_INTO_ANCHOR(r, a, ruleset, 3870126258Smlaier PF_RULESET_FILTER); 3871126258Smlaier } 3872126258Smlaier if (r == NULL && a != NULL) 3873126258Smlaier PF_STEP_OUT_OF_ANCHOR(r, a, ruleset, 3874126258Smlaier PF_RULESET_FILTER); 3875126258Smlaier } 3876126258Smlaier r = *rm; 3877126258Smlaier a = *am; 3878126258Smlaier ruleset = *rsm; 3879126258Smlaier 3880126258Smlaier REASON_SET(&reason, PFRES_MATCH); 3881130613Smlaier 3882126258Smlaier if (r->log) 3883130613Smlaier PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset); 3884126258Smlaier 3885126258Smlaier if (r->action != PF_PASS) 3886126258Smlaier return (PF_DROP); 3887126258Smlaier 3888126258Smlaier if (pf_tag_packet(m, pftag, tag)) { 3889126258Smlaier REASON_SET(&reason, PFRES_MEMORY); 3890126258Smlaier return (PF_DROP); 3891126258Smlaier } 3892126258Smlaier 3893126258Smlaier return (PF_PASS); 3894126258Smlaier} 3895126258Smlaier 3896126258Smlaierint 3897130613Smlaierpf_test_state_tcp(struct pf_state **state, int direction, struct pfi_kif *kif, 3898130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd, 3899126258Smlaier u_short *reason) 3900126258Smlaier{ 3901130613Smlaier struct pf_state key; 3902126258Smlaier struct tcphdr *th = pd->hdr.tcp; 3903126258Smlaier u_int16_t win = ntohs(th->th_win); 3904126258Smlaier u_int32_t ack, end, seq; 3905126258Smlaier u_int8_t sws, dws; 3906130613Smlaier int ackskew; 3907126258Smlaier int copyback = 0; 3908126258Smlaier struct pf_state_peer *src, *dst; 3909126258Smlaier 3910126258Smlaier key.af = pd->af; 3911126258Smlaier key.proto = IPPROTO_TCP; 3912130613Smlaier if (direction == PF_IN) { 3913130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 3914130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 3915130613Smlaier key.ext.port = th->th_sport; 3916130613Smlaier key.gwy.port = th->th_dport; 3917130613Smlaier } else { 3918130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 3919130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 3920130613Smlaier key.lan.port = th->th_sport; 3921130613Smlaier key.ext.port = th->th_dport; 3922130613Smlaier } 3923126258Smlaier 3924126258Smlaier STATE_LOOKUP(); 3925126258Smlaier 3926126258Smlaier if (direction == (*state)->direction) { 3927126258Smlaier src = &(*state)->src; 3928126258Smlaier dst = &(*state)->dst; 3929126258Smlaier } else { 3930126258Smlaier src = &(*state)->dst; 3931126258Smlaier dst = &(*state)->src; 3932126258Smlaier } 3933126258Smlaier 3934126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_SRC) { 3935126258Smlaier if (direction != (*state)->direction) 3936126258Smlaier return (PF_SYNPROXY_DROP); 3937126258Smlaier if (th->th_flags & TH_SYN) { 3938126258Smlaier if (ntohl(th->th_seq) != (*state)->src.seqlo) 3939126258Smlaier return (PF_DROP); 3940126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 3941126258Smlaier pd->src, th->th_dport, th->th_sport, 3942126258Smlaier (*state)->src.seqhi, ntohl(th->th_seq) + 1, 3943126258Smlaier TH_SYN|TH_ACK, 0, (*state)->src.mss, 0); 3944126258Smlaier return (PF_SYNPROXY_DROP); 3945126258Smlaier } else if (!(th->th_flags & TH_ACK) || 3946126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 3947126258Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) 3948126258Smlaier return (PF_DROP); 3949126258Smlaier else 3950126258Smlaier (*state)->src.state = PF_TCPS_PROXY_DST; 3951126258Smlaier } 3952126258Smlaier if ((*state)->src.state == PF_TCPS_PROXY_DST) { 3953126258Smlaier struct pf_state_host *src, *dst; 3954126258Smlaier 3955126258Smlaier if (direction == PF_OUT) { 3956126258Smlaier src = &(*state)->gwy; 3957126258Smlaier dst = &(*state)->ext; 3958126258Smlaier } else { 3959126258Smlaier src = &(*state)->ext; 3960126258Smlaier dst = &(*state)->lan; 3961126258Smlaier } 3962126258Smlaier if (direction == (*state)->direction) { 3963126258Smlaier if (((th->th_flags & (TH_SYN|TH_ACK)) != TH_ACK) || 3964126258Smlaier (ntohl(th->th_ack) != (*state)->src.seqhi + 1) || 3965126258Smlaier (ntohl(th->th_seq) != (*state)->src.seqlo + 1)) 3966126258Smlaier return (PF_DROP); 3967126258Smlaier (*state)->src.max_win = MAX(ntohs(th->th_win), 1); 3968126258Smlaier if ((*state)->dst.seqhi == 1) 3969126258Smlaier (*state)->dst.seqhi = arc4random(); 3970126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 3971126258Smlaier &dst->addr, src->port, dst->port, 3972130613Smlaier (*state)->dst.seqhi, 0, TH_SYN, 0, 3973130613Smlaier (*state)->src.mss, 0); 3974126258Smlaier return (PF_SYNPROXY_DROP); 3975126258Smlaier } else if (((th->th_flags & (TH_SYN|TH_ACK)) != 3976126258Smlaier (TH_SYN|TH_ACK)) || 3977126258Smlaier (ntohl(th->th_ack) != (*state)->dst.seqhi + 1)) 3978126258Smlaier return (PF_DROP); 3979126258Smlaier else { 3980126258Smlaier (*state)->dst.max_win = MAX(ntohs(th->th_win), 1); 3981126258Smlaier (*state)->dst.seqlo = ntohl(th->th_seq); 3982126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst, 3983126258Smlaier pd->src, th->th_dport, th->th_sport, 3984126258Smlaier ntohl(th->th_ack), ntohl(th->th_seq) + 1, 3985126258Smlaier TH_ACK, (*state)->src.max_win, 0, 0); 3986126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr, 3987126258Smlaier &dst->addr, src->port, dst->port, 3988126258Smlaier (*state)->src.seqhi + 1, (*state)->src.seqlo + 1, 3989126258Smlaier TH_ACK, (*state)->dst.max_win, 0, 0); 3990126258Smlaier (*state)->src.seqdiff = (*state)->dst.seqhi - 3991126258Smlaier (*state)->src.seqlo; 3992126258Smlaier (*state)->dst.seqdiff = (*state)->src.seqhi - 3993126258Smlaier (*state)->dst.seqlo; 3994126258Smlaier (*state)->src.seqhi = (*state)->src.seqlo + 3995126258Smlaier (*state)->src.max_win; 3996126258Smlaier (*state)->dst.seqhi = (*state)->dst.seqlo + 3997126258Smlaier (*state)->dst.max_win; 3998126258Smlaier (*state)->src.wscale = (*state)->dst.wscale = 0; 3999126258Smlaier (*state)->src.state = (*state)->dst.state = 4000126258Smlaier TCPS_ESTABLISHED; 4001126258Smlaier return (PF_SYNPROXY_DROP); 4002126258Smlaier } 4003126258Smlaier } 4004126258Smlaier 4005126258Smlaier if (src->wscale && dst->wscale && !(th->th_flags & TH_SYN)) { 4006126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4007126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4008126258Smlaier } else 4009126258Smlaier sws = dws = 0; 4010126258Smlaier 4011126258Smlaier /* 4012126258Smlaier * Sequence tracking algorithm from Guido van Rooij's paper: 4013126258Smlaier * http://www.madison-gurkha.com/publications/tcp_filtering/ 4014126258Smlaier * tcp_filtering.ps 4015126258Smlaier */ 4016126258Smlaier 4017126258Smlaier seq = ntohl(th->th_seq); 4018126258Smlaier if (src->seqlo == 0) { 4019126258Smlaier /* First packet from this end. Set its state */ 4020126258Smlaier 4021126258Smlaier if ((pd->flags & PFDESC_TCP_NORM || dst->scrub) && 4022126258Smlaier src->scrub == NULL) { 4023126258Smlaier if (pf_normalize_tcp_init(m, off, pd, th, src, dst)) { 4024126258Smlaier REASON_SET(reason, PFRES_MEMORY); 4025126258Smlaier return (PF_DROP); 4026126258Smlaier } 4027126258Smlaier } 4028126258Smlaier 4029126258Smlaier /* Deferred generation of sequence number modulator */ 4030126258Smlaier if (dst->seqdiff && !src->seqdiff) { 4031126258Smlaier while ((src->seqdiff = arc4random()) == 0) 4032126258Smlaier ; 4033126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4034126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4035126258Smlaier src->seqdiff), 0); 4036126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4037126258Smlaier copyback = 1; 4038126258Smlaier } else { 4039126258Smlaier ack = ntohl(th->th_ack); 4040126258Smlaier } 4041126258Smlaier 4042126258Smlaier end = seq + pd->p_len; 4043126258Smlaier if (th->th_flags & TH_SYN) { 4044126258Smlaier end++; 4045126258Smlaier if (dst->wscale & PF_WSCALE_FLAG) { 4046126258Smlaier src->wscale = pf_get_wscale(m, off, th->th_off, 4047126258Smlaier pd->af); 4048126258Smlaier if (src->wscale & PF_WSCALE_FLAG) { 4049126258Smlaier /* Remove scale factor from initial 4050126258Smlaier * window */ 4051126258Smlaier sws = src->wscale & PF_WSCALE_MASK; 4052126258Smlaier win = ((u_int32_t)win + (1 << sws) - 1) 4053126258Smlaier >> sws; 4054126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4055126258Smlaier } else { 4056126258Smlaier /* fixup other window */ 4057126258Smlaier dst->max_win <<= dst->wscale & 4058126258Smlaier PF_WSCALE_MASK; 4059126258Smlaier /* in case of a retrans SYN|ACK */ 4060126258Smlaier dst->wscale = 0; 4061126258Smlaier } 4062126258Smlaier } 4063126258Smlaier } 4064126258Smlaier if (th->th_flags & TH_FIN) 4065126258Smlaier end++; 4066126258Smlaier 4067126258Smlaier src->seqlo = seq; 4068126258Smlaier if (src->state < TCPS_SYN_SENT) 4069126258Smlaier src->state = TCPS_SYN_SENT; 4070126258Smlaier 4071126258Smlaier /* 4072126258Smlaier * May need to slide the window (seqhi may have been set by 4073126258Smlaier * the crappy stack check or if we picked up the connection 4074126258Smlaier * after establishment) 4075126258Smlaier */ 4076126258Smlaier if (src->seqhi == 1 || 4077126258Smlaier SEQ_GEQ(end + MAX(1, dst->max_win << dws), src->seqhi)) 4078126258Smlaier src->seqhi = end + MAX(1, dst->max_win << dws); 4079126258Smlaier if (win > src->max_win) 4080126258Smlaier src->max_win = win; 4081126258Smlaier 4082126258Smlaier } else { 4083126258Smlaier ack = ntohl(th->th_ack) - dst->seqdiff; 4084126258Smlaier if (src->seqdiff) { 4085126258Smlaier /* Modulate sequence numbers */ 4086126258Smlaier pf_change_a(&th->th_seq, &th->th_sum, htonl(seq + 4087126258Smlaier src->seqdiff), 0); 4088126258Smlaier pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0); 4089126258Smlaier copyback = 1; 4090126258Smlaier } 4091126258Smlaier end = seq + pd->p_len; 4092126258Smlaier if (th->th_flags & TH_SYN) 4093126258Smlaier end++; 4094126258Smlaier if (th->th_flags & TH_FIN) 4095126258Smlaier end++; 4096126258Smlaier } 4097126258Smlaier 4098126258Smlaier if ((th->th_flags & TH_ACK) == 0) { 4099126258Smlaier /* Let it pass through the ack skew check */ 4100126258Smlaier ack = dst->seqlo; 4101126258Smlaier } else if ((ack == 0 && 4102126258Smlaier (th->th_flags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) || 4103126258Smlaier /* broken tcp stacks do not set ack */ 4104126258Smlaier (dst->state < TCPS_SYN_SENT)) { 4105126258Smlaier /* 4106126258Smlaier * Many stacks (ours included) will set the ACK number in an 4107126258Smlaier * FIN|ACK if the SYN times out -- no sequence to ACK. 4108126258Smlaier */ 4109126258Smlaier ack = dst->seqlo; 4110126258Smlaier } 4111126258Smlaier 4112126258Smlaier if (seq == end) { 4113126258Smlaier /* Ease sequencing restrictions on no data packets */ 4114126258Smlaier seq = src->seqlo; 4115126258Smlaier end = seq; 4116126258Smlaier } 4117126258Smlaier 4118126258Smlaier ackskew = dst->seqlo - ack; 4119126258Smlaier 4120126258Smlaier#define MAXACKWINDOW (0xffff + 1500) /* 1500 is an arbitrary fudge factor */ 4121126258Smlaier if (SEQ_GEQ(src->seqhi, end) && 4122126258Smlaier /* Last octet inside other's window space */ 4123126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) && 4124126258Smlaier /* Retrans: not more than one window back */ 4125126258Smlaier (ackskew >= -MAXACKWINDOW) && 4126126258Smlaier /* Acking not more than one reassembled fragment backwards */ 4127126258Smlaier (ackskew <= (MAXACKWINDOW << sws))) { 4128126258Smlaier /* Acking not more than one window forward */ 4129126258Smlaier 4130126258Smlaier /* update max window */ 4131126258Smlaier if (src->max_win < win) 4132126258Smlaier src->max_win = win; 4133126258Smlaier /* synchronize sequencing */ 4134126258Smlaier if (SEQ_GT(end, src->seqlo)) 4135126258Smlaier src->seqlo = end; 4136126258Smlaier /* slide the window of what the other end can send */ 4137126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4138126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4139126258Smlaier 4140126258Smlaier 4141126258Smlaier /* update states */ 4142126258Smlaier if (th->th_flags & TH_SYN) 4143126258Smlaier if (src->state < TCPS_SYN_SENT) 4144126258Smlaier src->state = TCPS_SYN_SENT; 4145126258Smlaier if (th->th_flags & TH_FIN) 4146126258Smlaier if (src->state < TCPS_CLOSING) 4147126258Smlaier src->state = TCPS_CLOSING; 4148126258Smlaier if (th->th_flags & TH_ACK) { 4149126258Smlaier if (dst->state == TCPS_SYN_SENT) 4150126258Smlaier dst->state = TCPS_ESTABLISHED; 4151126258Smlaier else if (dst->state == TCPS_CLOSING) 4152126258Smlaier dst->state = TCPS_FIN_WAIT_2; 4153126258Smlaier } 4154126258Smlaier if (th->th_flags & TH_RST) 4155126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4156126258Smlaier 4157126258Smlaier /* update expire time */ 4158127145Smlaier#ifdef __FreeBSD__ 4159126261Smlaier (*state)->expire = time_second; 4160126261Smlaier#else 4161126258Smlaier (*state)->expire = time.tv_sec; 4162126261Smlaier#endif 4163126258Smlaier if (src->state >= TCPS_FIN_WAIT_2 && 4164126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4165126258Smlaier (*state)->timeout = PFTM_TCP_CLOSED; 4166126258Smlaier else if (src->state >= TCPS_FIN_WAIT_2 || 4167126258Smlaier dst->state >= TCPS_FIN_WAIT_2) 4168126258Smlaier (*state)->timeout = PFTM_TCP_FIN_WAIT; 4169126258Smlaier else if (src->state < TCPS_ESTABLISHED || 4170126258Smlaier dst->state < TCPS_ESTABLISHED) 4171126258Smlaier (*state)->timeout = PFTM_TCP_OPENING; 4172126258Smlaier else if (src->state >= TCPS_CLOSING || 4173126258Smlaier dst->state >= TCPS_CLOSING) 4174126258Smlaier (*state)->timeout = PFTM_TCP_CLOSING; 4175126258Smlaier else 4176126258Smlaier (*state)->timeout = PFTM_TCP_ESTABLISHED; 4177126258Smlaier 4178126258Smlaier /* Fall through to PASS packet */ 4179126258Smlaier 4180126258Smlaier } else if ((dst->state < TCPS_SYN_SENT || 4181126258Smlaier dst->state >= TCPS_FIN_WAIT_2 || 4182126258Smlaier src->state >= TCPS_FIN_WAIT_2) && 4183126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) && 4184126258Smlaier /* Within a window forward of the originating packet */ 4185126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW)) { 4186126258Smlaier /* Within a window backward of the originating packet */ 4187126258Smlaier 4188126258Smlaier /* 4189126258Smlaier * This currently handles three situations: 4190126258Smlaier * 1) Stupid stacks will shotgun SYNs before their peer 4191126258Smlaier * replies. 4192126258Smlaier * 2) When PF catches an already established stream (the 4193126258Smlaier * firewall rebooted, the state table was flushed, routes 4194126258Smlaier * changed...) 4195126258Smlaier * 3) Packets get funky immediately after the connection 4196126258Smlaier * closes (this should catch Solaris spurious ACK|FINs 4197126258Smlaier * that web servers like to spew after a close) 4198126258Smlaier * 4199126258Smlaier * This must be a little more careful than the above code 4200126258Smlaier * since packet floods will also be caught here. We don't 4201126258Smlaier * update the TTL here to mitigate the damage of a packet 4202126258Smlaier * flood and so the same code can handle awkward establishment 4203126258Smlaier * and a loosened connection close. 4204126258Smlaier * In the establishment case, a correct peer response will 4205126258Smlaier * validate the connection, go through the normal state code 4206126258Smlaier * and keep updating the state TTL. 4207126258Smlaier */ 4208126258Smlaier 4209126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 4210126258Smlaier printf("pf: loose state match: "); 4211126258Smlaier pf_print_state(*state); 4212126258Smlaier pf_print_flags(th->th_flags); 4213126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d\n", 4214126258Smlaier seq, ack, pd->p_len, ackskew, 4215126258Smlaier (*state)->packets[0], (*state)->packets[1]); 4216126258Smlaier } 4217126258Smlaier 4218126258Smlaier /* update max window */ 4219126258Smlaier if (src->max_win < win) 4220126258Smlaier src->max_win = win; 4221126258Smlaier /* synchronize sequencing */ 4222126258Smlaier if (SEQ_GT(end, src->seqlo)) 4223126258Smlaier src->seqlo = end; 4224126258Smlaier /* slide the window of what the other end can send */ 4225126258Smlaier if (SEQ_GEQ(ack + (win << sws), dst->seqhi)) 4226126258Smlaier dst->seqhi = ack + MAX((win << sws), 1); 4227126258Smlaier 4228126258Smlaier /* 4229126258Smlaier * Cannot set dst->seqhi here since this could be a shotgunned 4230126258Smlaier * SYN and not an already established connection. 4231126258Smlaier */ 4232126258Smlaier 4233126258Smlaier if (th->th_flags & TH_FIN) 4234126258Smlaier if (src->state < TCPS_CLOSING) 4235126258Smlaier src->state = TCPS_CLOSING; 4236126258Smlaier if (th->th_flags & TH_RST) 4237126258Smlaier src->state = dst->state = TCPS_TIME_WAIT; 4238126258Smlaier 4239126258Smlaier /* Fall through to PASS packet */ 4240126258Smlaier 4241126258Smlaier } else { 4242126258Smlaier if ((*state)->dst.state == TCPS_SYN_SENT && 4243126258Smlaier (*state)->src.state == TCPS_SYN_SENT) { 4244126258Smlaier /* Send RST for state mismatches during handshake */ 4245126258Smlaier if (!(th->th_flags & TH_RST)) { 4246126258Smlaier u_int32_t ack = ntohl(th->th_seq) + pd->p_len; 4247126258Smlaier 4248126258Smlaier if (th->th_flags & TH_SYN) 4249126258Smlaier ack++; 4250126258Smlaier if (th->th_flags & TH_FIN) 4251126258Smlaier ack++; 4252126258Smlaier pf_send_tcp((*state)->rule.ptr, pd->af, 4253126258Smlaier pd->dst, pd->src, th->th_dport, 4254126258Smlaier th->th_sport, ntohl(th->th_ack), ack, 4255126258Smlaier TH_RST|TH_ACK, 0, 0, 4256126258Smlaier (*state)->rule.ptr->return_ttl); 4257126258Smlaier } 4258126258Smlaier src->seqlo = 0; 4259126258Smlaier src->seqhi = 1; 4260126258Smlaier src->max_win = 1; 4261126258Smlaier } else if (pf_status.debug >= PF_DEBUG_MISC) { 4262126258Smlaier printf("pf: BAD state: "); 4263126258Smlaier pf_print_state(*state); 4264126258Smlaier pf_print_flags(th->th_flags); 4265126258Smlaier printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d " 4266126258Smlaier "dir=%s,%s\n", seq, ack, pd->p_len, ackskew, 4267126258Smlaier (*state)->packets[0], (*state)->packets[1], 4268126258Smlaier direction == PF_IN ? "in" : "out", 4269126258Smlaier direction == (*state)->direction ? "fwd" : "rev"); 4270126258Smlaier printf("pf: State failure on: %c %c %c %c | %c %c\n", 4271126258Smlaier SEQ_GEQ(src->seqhi, end) ? ' ' : '1', 4272126258Smlaier SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) ? 4273126258Smlaier ' ': '2', 4274126258Smlaier (ackskew >= -MAXACKWINDOW) ? ' ' : '3', 4275126258Smlaier (ackskew <= (MAXACKWINDOW << sws)) ? ' ' : '4', 4276126258Smlaier SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) ?' ' :'5', 4277126258Smlaier SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW) ?' ' :'6'); 4278126258Smlaier } 4279126258Smlaier return (PF_DROP); 4280126258Smlaier } 4281126258Smlaier 4282126258Smlaier if (dst->scrub || src->scrub) { 4283130613Smlaier if (pf_normalize_tcp_stateful(m, off, pd, reason, th, 4284130613Smlaier src, dst, ©back)) 4285126258Smlaier return (PF_DROP); 4286126258Smlaier } 4287126258Smlaier 4288126258Smlaier /* Any packets which have gotten here are to be passed */ 4289126258Smlaier 4290126258Smlaier /* translate source/destination address, if necessary */ 4291126258Smlaier if (STATE_TRANSLATE(*state)) { 4292126258Smlaier if (direction == PF_OUT) 4293126258Smlaier pf_change_ap(pd->src, &th->th_sport, pd->ip_sum, 4294126258Smlaier &th->th_sum, &(*state)->gwy.addr, 4295126258Smlaier (*state)->gwy.port, 0, pd->af); 4296126258Smlaier else 4297126258Smlaier pf_change_ap(pd->dst, &th->th_dport, pd->ip_sum, 4298126258Smlaier &th->th_sum, &(*state)->lan.addr, 4299126258Smlaier (*state)->lan.port, 0, pd->af); 4300126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4301126258Smlaier } else if (copyback) { 4302126258Smlaier /* Copyback sequence modulation or stateful scrub changes */ 4303126261Smlaier m_copyback(m, off, sizeof(*th), (caddr_t)th); 4304126258Smlaier } 4305126258Smlaier 4306126258Smlaier return (PF_PASS); 4307126258Smlaier} 4308126258Smlaier 4309126258Smlaierint 4310130613Smlaierpf_test_state_udp(struct pf_state **state, int direction, struct pfi_kif *kif, 4311130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd) 4312126258Smlaier{ 4313126258Smlaier struct pf_state_peer *src, *dst; 4314130613Smlaier struct pf_state key; 4315126258Smlaier struct udphdr *uh = pd->hdr.udp; 4316126258Smlaier 4317126258Smlaier key.af = pd->af; 4318126258Smlaier key.proto = IPPROTO_UDP; 4319130613Smlaier if (direction == PF_IN) { 4320130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4321130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4322130613Smlaier key.ext.port = uh->uh_sport; 4323130613Smlaier key.gwy.port = uh->uh_dport; 4324130613Smlaier } else { 4325130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4326130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4327130613Smlaier key.lan.port = uh->uh_sport; 4328130613Smlaier key.ext.port = uh->uh_dport; 4329130613Smlaier } 4330126258Smlaier 4331126258Smlaier STATE_LOOKUP(); 4332126258Smlaier 4333126258Smlaier if (direction == (*state)->direction) { 4334126258Smlaier src = &(*state)->src; 4335126258Smlaier dst = &(*state)->dst; 4336126258Smlaier } else { 4337126258Smlaier src = &(*state)->dst; 4338126258Smlaier dst = &(*state)->src; 4339126258Smlaier } 4340126258Smlaier 4341126258Smlaier /* update states */ 4342126258Smlaier if (src->state < PFUDPS_SINGLE) 4343126258Smlaier src->state = PFUDPS_SINGLE; 4344126258Smlaier if (dst->state == PFUDPS_SINGLE) 4345126258Smlaier dst->state = PFUDPS_MULTIPLE; 4346126258Smlaier 4347126258Smlaier /* update expire time */ 4348127145Smlaier#ifdef __FreeBSD__ 4349126261Smlaier (*state)->expire = time_second; 4350126261Smlaier#else 4351126258Smlaier (*state)->expire = time.tv_sec; 4352126261Smlaier#endif 4353126258Smlaier if (src->state == PFUDPS_MULTIPLE && dst->state == PFUDPS_MULTIPLE) 4354126258Smlaier (*state)->timeout = PFTM_UDP_MULTIPLE; 4355126258Smlaier else 4356126258Smlaier (*state)->timeout = PFTM_UDP_SINGLE; 4357126258Smlaier 4358126258Smlaier /* translate source/destination address, if necessary */ 4359126258Smlaier if (STATE_TRANSLATE(*state)) { 4360126258Smlaier if (direction == PF_OUT) 4361126258Smlaier pf_change_ap(pd->src, &uh->uh_sport, pd->ip_sum, 4362126258Smlaier &uh->uh_sum, &(*state)->gwy.addr, 4363126258Smlaier (*state)->gwy.port, 1, pd->af); 4364126258Smlaier else 4365126258Smlaier pf_change_ap(pd->dst, &uh->uh_dport, pd->ip_sum, 4366126258Smlaier &uh->uh_sum, &(*state)->lan.addr, 4367126258Smlaier (*state)->lan.port, 1, pd->af); 4368126261Smlaier m_copyback(m, off, sizeof(*uh), (caddr_t)uh); 4369126258Smlaier } 4370126258Smlaier 4371126258Smlaier return (PF_PASS); 4372126258Smlaier} 4373126258Smlaier 4374126258Smlaierint 4375130613Smlaierpf_test_state_icmp(struct pf_state **state, int direction, struct pfi_kif *kif, 4376130613Smlaier struct mbuf *m, int off, void *h, struct pf_pdesc *pd) 4377126258Smlaier{ 4378126258Smlaier struct pf_addr *saddr = pd->src, *daddr = pd->dst; 4379127629Smlaier u_int16_t icmpid = 0; /* make the compiler happy */ 4380127629Smlaier u_int16_t *icmpsum = NULL; /* make the compiler happy */ 4381127629Smlaier u_int8_t icmptype = 0; /* make the compiler happy */ 4382130613Smlaier int state_icmp = 0; 4383126258Smlaier 4384126258Smlaier switch (pd->proto) { 4385126258Smlaier#ifdef INET 4386126258Smlaier case IPPROTO_ICMP: 4387126258Smlaier icmptype = pd->hdr.icmp->icmp_type; 4388126258Smlaier icmpid = pd->hdr.icmp->icmp_id; 4389126258Smlaier icmpsum = &pd->hdr.icmp->icmp_cksum; 4390126258Smlaier 4391126258Smlaier if (icmptype == ICMP_UNREACH || 4392126258Smlaier icmptype == ICMP_SOURCEQUENCH || 4393126258Smlaier icmptype == ICMP_REDIRECT || 4394126258Smlaier icmptype == ICMP_TIMXCEED || 4395126258Smlaier icmptype == ICMP_PARAMPROB) 4396126258Smlaier state_icmp++; 4397126258Smlaier break; 4398126258Smlaier#endif /* INET */ 4399126258Smlaier#ifdef INET6 4400126258Smlaier case IPPROTO_ICMPV6: 4401126258Smlaier icmptype = pd->hdr.icmp6->icmp6_type; 4402126258Smlaier icmpid = pd->hdr.icmp6->icmp6_id; 4403126258Smlaier icmpsum = &pd->hdr.icmp6->icmp6_cksum; 4404126258Smlaier 4405126258Smlaier if (icmptype == ICMP6_DST_UNREACH || 4406126258Smlaier icmptype == ICMP6_PACKET_TOO_BIG || 4407126258Smlaier icmptype == ICMP6_TIME_EXCEEDED || 4408126258Smlaier icmptype == ICMP6_PARAM_PROB) 4409126258Smlaier state_icmp++; 4410126258Smlaier break; 4411126258Smlaier#endif /* INET6 */ 4412126258Smlaier } 4413126258Smlaier 4414126258Smlaier if (!state_icmp) { 4415126258Smlaier 4416126258Smlaier /* 4417126258Smlaier * ICMP query/reply message not related to a TCP/UDP packet. 4418126258Smlaier * Search for an ICMP state. 4419126258Smlaier */ 4420130613Smlaier struct pf_state key; 4421126258Smlaier 4422126258Smlaier key.af = pd->af; 4423126258Smlaier key.proto = pd->proto; 4424130613Smlaier if (direction == PF_IN) { 4425130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4426130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4427130613Smlaier key.ext.port = icmpid; 4428130613Smlaier key.gwy.port = icmpid; 4429130613Smlaier } else { 4430130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4431130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4432130613Smlaier key.lan.port = icmpid; 4433130613Smlaier key.ext.port = icmpid; 4434130613Smlaier } 4435126258Smlaier 4436126258Smlaier STATE_LOOKUP(); 4437126258Smlaier 4438127145Smlaier#ifdef __FreeBSD__ 4439126261Smlaier (*state)->expire = time_second; 4440126261Smlaier#else 4441126258Smlaier (*state)->expire = time.tv_sec; 4442126261Smlaier#endif 4443126258Smlaier (*state)->timeout = PFTM_ICMP_ERROR_REPLY; 4444126258Smlaier 4445126258Smlaier /* translate source/destination address, if necessary */ 4446126258Smlaier if (PF_ANEQ(&(*state)->lan.addr, &(*state)->gwy.addr, pd->af)) { 4447126258Smlaier if (direction == PF_OUT) { 4448126258Smlaier switch (pd->af) { 4449126258Smlaier#ifdef INET 4450126258Smlaier case AF_INET: 4451126258Smlaier pf_change_a(&saddr->v4.s_addr, 4452126258Smlaier pd->ip_sum, 4453126258Smlaier (*state)->gwy.addr.v4.s_addr, 0); 4454126258Smlaier break; 4455126258Smlaier#endif /* INET */ 4456126258Smlaier#ifdef INET6 4457126258Smlaier case AF_INET6: 4458126258Smlaier pf_change_a6(saddr, 4459126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4460126258Smlaier &(*state)->gwy.addr, 0); 4461126258Smlaier m_copyback(m, off, 4462126258Smlaier sizeof(struct icmp6_hdr), 4463126261Smlaier (caddr_t)pd->hdr.icmp6); 4464126258Smlaier break; 4465126258Smlaier#endif /* INET6 */ 4466126258Smlaier } 4467126258Smlaier } else { 4468126258Smlaier switch (pd->af) { 4469126258Smlaier#ifdef INET 4470126258Smlaier case AF_INET: 4471126258Smlaier pf_change_a(&daddr->v4.s_addr, 4472126258Smlaier pd->ip_sum, 4473126258Smlaier (*state)->lan.addr.v4.s_addr, 0); 4474126258Smlaier break; 4475126258Smlaier#endif /* INET */ 4476126258Smlaier#ifdef INET6 4477126258Smlaier case AF_INET6: 4478126258Smlaier pf_change_a6(daddr, 4479126258Smlaier &pd->hdr.icmp6->icmp6_cksum, 4480126258Smlaier &(*state)->lan.addr, 0); 4481126258Smlaier m_copyback(m, off, 4482126258Smlaier sizeof(struct icmp6_hdr), 4483126261Smlaier (caddr_t)pd->hdr.icmp6); 4484126258Smlaier break; 4485126258Smlaier#endif /* INET6 */ 4486126258Smlaier } 4487126258Smlaier } 4488126258Smlaier } 4489126258Smlaier 4490126258Smlaier return (PF_PASS); 4491126258Smlaier 4492126258Smlaier } else { 4493126258Smlaier /* 4494126258Smlaier * ICMP error message in response to a TCP/UDP packet. 4495126258Smlaier * Extract the inner TCP/UDP header and search for that state. 4496126258Smlaier */ 4497126258Smlaier 4498126258Smlaier struct pf_pdesc pd2; 4499126258Smlaier#ifdef INET 4500126258Smlaier struct ip h2; 4501126258Smlaier#endif /* INET */ 4502126258Smlaier#ifdef INET6 4503126258Smlaier struct ip6_hdr h2_6; 4504126258Smlaier int terminal = 0; 4505126258Smlaier#endif /* INET6 */ 4506127629Smlaier int ipoff2 = 0; /* make the compiler happy */ 4507127629Smlaier int off2 = 0; /* make the compiler happy */ 4508126258Smlaier 4509126258Smlaier pd2.af = pd->af; 4510126258Smlaier switch (pd->af) { 4511126258Smlaier#ifdef INET 4512126258Smlaier case AF_INET: 4513126258Smlaier /* offset of h2 in mbuf chain */ 4514126258Smlaier ipoff2 = off + ICMP_MINLEN; 4515126258Smlaier 4516126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2, sizeof(h2), 4517126258Smlaier NULL, NULL, pd2.af)) { 4518126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4519126258Smlaier ("pf: ICMP error message too short " 4520126258Smlaier "(ip)\n")); 4521126258Smlaier return (PF_DROP); 4522126258Smlaier } 4523126258Smlaier /* 4524126258Smlaier * ICMP error messages don't refer to non-first 4525126258Smlaier * fragments 4526126258Smlaier */ 4527126258Smlaier if (h2.ip_off & htons(IP_OFFMASK)) 4528126258Smlaier return (PF_DROP); 4529126258Smlaier 4530126258Smlaier /* offset of protocol header that follows h2 */ 4531126258Smlaier off2 = ipoff2 + (h2.ip_hl << 2); 4532126258Smlaier 4533126258Smlaier pd2.proto = h2.ip_p; 4534126258Smlaier pd2.src = (struct pf_addr *)&h2.ip_src; 4535126258Smlaier pd2.dst = (struct pf_addr *)&h2.ip_dst; 4536126258Smlaier pd2.ip_sum = &h2.ip_sum; 4537126258Smlaier break; 4538126258Smlaier#endif /* INET */ 4539126258Smlaier#ifdef INET6 4540126258Smlaier case AF_INET6: 4541126258Smlaier ipoff2 = off + sizeof(struct icmp6_hdr); 4542126258Smlaier 4543126258Smlaier if (!pf_pull_hdr(m, ipoff2, &h2_6, sizeof(h2_6), 4544126258Smlaier NULL, NULL, pd2.af)) { 4545126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4546126258Smlaier ("pf: ICMP error message too short " 4547126258Smlaier "(ip6)\n")); 4548126258Smlaier return (PF_DROP); 4549126258Smlaier } 4550126258Smlaier pd2.proto = h2_6.ip6_nxt; 4551126258Smlaier pd2.src = (struct pf_addr *)&h2_6.ip6_src; 4552126258Smlaier pd2.dst = (struct pf_addr *)&h2_6.ip6_dst; 4553126258Smlaier pd2.ip_sum = NULL; 4554126258Smlaier off2 = ipoff2 + sizeof(h2_6); 4555126258Smlaier do { 4556126258Smlaier switch (pd2.proto) { 4557126258Smlaier case IPPROTO_FRAGMENT: 4558126258Smlaier /* 4559126258Smlaier * ICMPv6 error messages for 4560126258Smlaier * non-first fragments 4561126258Smlaier */ 4562126258Smlaier return (PF_DROP); 4563126258Smlaier case IPPROTO_AH: 4564126258Smlaier case IPPROTO_HOPOPTS: 4565126258Smlaier case IPPROTO_ROUTING: 4566126258Smlaier case IPPROTO_DSTOPTS: { 4567126258Smlaier /* get next header and header length */ 4568126258Smlaier struct ip6_ext opt6; 4569126258Smlaier 4570126258Smlaier if (!pf_pull_hdr(m, off2, &opt6, 4571126258Smlaier sizeof(opt6), NULL, NULL, pd2.af)) { 4572126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4573126258Smlaier ("pf: ICMPv6 short opt\n")); 4574126258Smlaier return (PF_DROP); 4575126258Smlaier } 4576126258Smlaier if (pd2.proto == IPPROTO_AH) 4577126258Smlaier off2 += (opt6.ip6e_len + 2) * 4; 4578126258Smlaier else 4579126258Smlaier off2 += (opt6.ip6e_len + 1) * 8; 4580126258Smlaier pd2.proto = opt6.ip6e_nxt; 4581126258Smlaier /* goto the next header */ 4582126258Smlaier break; 4583126258Smlaier } 4584126258Smlaier default: 4585126258Smlaier terminal++; 4586126258Smlaier break; 4587126258Smlaier } 4588126258Smlaier } while (!terminal); 4589126258Smlaier break; 4590126258Smlaier#endif /* INET6 */ 4591126258Smlaier } 4592126258Smlaier 4593126258Smlaier switch (pd2.proto) { 4594126258Smlaier case IPPROTO_TCP: { 4595126258Smlaier struct tcphdr th; 4596126258Smlaier u_int32_t seq; 4597130613Smlaier struct pf_state key; 4598126258Smlaier struct pf_state_peer *src, *dst; 4599126258Smlaier u_int8_t dws; 4600128129Smlaier int copyback = 0; 4601126258Smlaier 4602126258Smlaier /* 4603126258Smlaier * Only the first 8 bytes of the TCP header can be 4604126258Smlaier * expected. Don't access any TCP header fields after 4605126258Smlaier * th_seq, an ackskew test is not possible. 4606126258Smlaier */ 4607126258Smlaier if (!pf_pull_hdr(m, off2, &th, 8, NULL, NULL, pd2.af)) { 4608126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4609126258Smlaier ("pf: ICMP error message too short " 4610126258Smlaier "(tcp)\n")); 4611126258Smlaier return (PF_DROP); 4612126258Smlaier } 4613126258Smlaier 4614126258Smlaier key.af = pd2.af; 4615126258Smlaier key.proto = IPPROTO_TCP; 4616130613Smlaier if (direction == PF_IN) { 4617130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4618130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4619130613Smlaier key.ext.port = th.th_dport; 4620130613Smlaier key.gwy.port = th.th_sport; 4621130613Smlaier } else { 4622130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4623130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 4624130613Smlaier key.lan.port = th.th_dport; 4625130613Smlaier key.ext.port = th.th_sport; 4626130613Smlaier } 4627126258Smlaier 4628126258Smlaier STATE_LOOKUP(); 4629126258Smlaier 4630126258Smlaier if (direction == (*state)->direction) { 4631126258Smlaier src = &(*state)->dst; 4632126258Smlaier dst = &(*state)->src; 4633126258Smlaier } else { 4634126258Smlaier src = &(*state)->src; 4635126258Smlaier dst = &(*state)->dst; 4636126258Smlaier } 4637126258Smlaier 4638130613Smlaier if (src->wscale && dst->wscale && 4639130613Smlaier !(th.th_flags & TH_SYN)) 4640126258Smlaier dws = dst->wscale & PF_WSCALE_MASK; 4641126258Smlaier else 4642126258Smlaier dws = 0; 4643126258Smlaier 4644126258Smlaier /* Demodulate sequence number */ 4645126258Smlaier seq = ntohl(th.th_seq) - src->seqdiff; 4646128129Smlaier if (src->seqdiff) { 4647128129Smlaier pf_change_a(&th.th_seq, icmpsum, 4648126258Smlaier htonl(seq), 0); 4649128129Smlaier copyback = 1; 4650128129Smlaier } 4651126258Smlaier 4652126258Smlaier if (!SEQ_GEQ(src->seqhi, seq) || 4653126258Smlaier !SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws))) { 4654126258Smlaier if (pf_status.debug >= PF_DEBUG_MISC) { 4655126258Smlaier printf("pf: BAD ICMP %d:%d ", 4656126258Smlaier icmptype, pd->hdr.icmp->icmp_code); 4657126258Smlaier pf_print_host(pd->src, 0, pd->af); 4658126258Smlaier printf(" -> "); 4659126258Smlaier pf_print_host(pd->dst, 0, pd->af); 4660126258Smlaier printf(" state: "); 4661126258Smlaier pf_print_state(*state); 4662126258Smlaier printf(" seq=%u\n", seq); 4663126258Smlaier } 4664126258Smlaier return (PF_DROP); 4665126258Smlaier } 4666126258Smlaier 4667126258Smlaier if (STATE_TRANSLATE(*state)) { 4668126258Smlaier if (direction == PF_IN) { 4669126258Smlaier pf_change_icmp(pd2.src, &th.th_sport, 4670128129Smlaier daddr, &(*state)->lan.addr, 4671126258Smlaier (*state)->lan.port, NULL, 4672126258Smlaier pd2.ip_sum, icmpsum, 4673126258Smlaier pd->ip_sum, 0, pd2.af); 4674126258Smlaier } else { 4675126258Smlaier pf_change_icmp(pd2.dst, &th.th_dport, 4676126258Smlaier saddr, &(*state)->gwy.addr, 4677126258Smlaier (*state)->gwy.port, NULL, 4678126258Smlaier pd2.ip_sum, icmpsum, 4679126258Smlaier pd->ip_sum, 0, pd2.af); 4680126258Smlaier } 4681128129Smlaier copyback = 1; 4682128129Smlaier } 4683128129Smlaier 4684128129Smlaier if (copyback) { 4685126258Smlaier switch (pd2.af) { 4686126258Smlaier#ifdef INET 4687126258Smlaier case AF_INET: 4688126258Smlaier m_copyback(m, off, ICMP_MINLEN, 4689126261Smlaier (caddr_t)pd->hdr.icmp); 4690126258Smlaier m_copyback(m, ipoff2, sizeof(h2), 4691126261Smlaier (caddr_t)&h2); 4692126258Smlaier break; 4693126258Smlaier#endif /* INET */ 4694126258Smlaier#ifdef INET6 4695126258Smlaier case AF_INET6: 4696126258Smlaier m_copyback(m, off, 4697126258Smlaier sizeof(struct icmp6_hdr), 4698126261Smlaier (caddr_t)pd->hdr.icmp6); 4699126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 4700126261Smlaier (caddr_t)&h2_6); 4701126258Smlaier break; 4702126258Smlaier#endif /* INET6 */ 4703126258Smlaier } 4704126261Smlaier m_copyback(m, off2, 8, (caddr_t)&th); 4705126258Smlaier } 4706126258Smlaier 4707126258Smlaier return (PF_PASS); 4708126258Smlaier break; 4709126258Smlaier } 4710126258Smlaier case IPPROTO_UDP: { 4711126258Smlaier struct udphdr uh; 4712130613Smlaier struct pf_state key; 4713126258Smlaier 4714126258Smlaier if (!pf_pull_hdr(m, off2, &uh, sizeof(uh), 4715126258Smlaier NULL, NULL, pd2.af)) { 4716126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4717126258Smlaier ("pf: ICMP error message too short " 4718126258Smlaier "(udp)\n")); 4719126258Smlaier return (PF_DROP); 4720126258Smlaier } 4721126258Smlaier 4722126258Smlaier key.af = pd2.af; 4723126258Smlaier key.proto = IPPROTO_UDP; 4724130613Smlaier if (direction == PF_IN) { 4725130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4726130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4727130613Smlaier key.ext.port = uh.uh_dport; 4728130613Smlaier key.gwy.port = uh.uh_sport; 4729130613Smlaier } else { 4730130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4731130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 4732130613Smlaier key.lan.port = uh.uh_dport; 4733130613Smlaier key.ext.port = uh.uh_sport; 4734130613Smlaier } 4735126258Smlaier 4736126258Smlaier STATE_LOOKUP(); 4737126258Smlaier 4738126258Smlaier if (STATE_TRANSLATE(*state)) { 4739126258Smlaier if (direction == PF_IN) { 4740126258Smlaier pf_change_icmp(pd2.src, &uh.uh_sport, 4741126258Smlaier daddr, &(*state)->lan.addr, 4742126258Smlaier (*state)->lan.port, &uh.uh_sum, 4743126258Smlaier pd2.ip_sum, icmpsum, 4744126258Smlaier pd->ip_sum, 1, pd2.af); 4745126258Smlaier } else { 4746126258Smlaier pf_change_icmp(pd2.dst, &uh.uh_dport, 4747126258Smlaier saddr, &(*state)->gwy.addr, 4748126258Smlaier (*state)->gwy.port, &uh.uh_sum, 4749126258Smlaier pd2.ip_sum, icmpsum, 4750126258Smlaier pd->ip_sum, 1, pd2.af); 4751126258Smlaier } 4752126258Smlaier switch (pd2.af) { 4753126258Smlaier#ifdef INET 4754126258Smlaier case AF_INET: 4755126258Smlaier m_copyback(m, off, ICMP_MINLEN, 4756126261Smlaier (caddr_t)pd->hdr.icmp); 4757126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 4758126261Smlaier (caddr_t)&h2); 4759126258Smlaier break; 4760126258Smlaier#endif /* INET */ 4761126258Smlaier#ifdef INET6 4762126258Smlaier case AF_INET6: 4763126258Smlaier m_copyback(m, off, 4764126258Smlaier sizeof(struct icmp6_hdr), 4765126261Smlaier (caddr_t)pd->hdr.icmp6); 4766126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 4767126261Smlaier (caddr_t)&h2_6); 4768126258Smlaier break; 4769126258Smlaier#endif /* INET6 */ 4770126258Smlaier } 4771126261Smlaier m_copyback(m, off2, sizeof(uh), 4772126261Smlaier (caddr_t)&uh); 4773126258Smlaier } 4774126258Smlaier 4775126258Smlaier return (PF_PASS); 4776126258Smlaier break; 4777126258Smlaier } 4778126258Smlaier#ifdef INET 4779126258Smlaier case IPPROTO_ICMP: { 4780126258Smlaier struct icmp iih; 4781130613Smlaier struct pf_state key; 4782126258Smlaier 4783126258Smlaier if (!pf_pull_hdr(m, off2, &iih, ICMP_MINLEN, 4784126258Smlaier NULL, NULL, pd2.af)) { 4785126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4786126258Smlaier ("pf: ICMP error message too short i" 4787126258Smlaier "(icmp)\n")); 4788126258Smlaier return (PF_DROP); 4789126258Smlaier } 4790126258Smlaier 4791126258Smlaier key.af = pd2.af; 4792126258Smlaier key.proto = IPPROTO_ICMP; 4793130613Smlaier if (direction == PF_IN) { 4794130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4795130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4796130613Smlaier key.ext.port = iih.icmp_id; 4797130613Smlaier key.gwy.port = iih.icmp_id; 4798130613Smlaier } else { 4799130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4800130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 4801130613Smlaier key.lan.port = iih.icmp_id; 4802130613Smlaier key.ext.port = iih.icmp_id; 4803130613Smlaier } 4804126258Smlaier 4805126258Smlaier STATE_LOOKUP(); 4806126258Smlaier 4807126258Smlaier if (STATE_TRANSLATE(*state)) { 4808126258Smlaier if (direction == PF_IN) { 4809126258Smlaier pf_change_icmp(pd2.src, &iih.icmp_id, 4810126258Smlaier daddr, &(*state)->lan.addr, 4811126258Smlaier (*state)->lan.port, NULL, 4812126258Smlaier pd2.ip_sum, icmpsum, 4813126258Smlaier pd->ip_sum, 0, AF_INET); 4814126258Smlaier } else { 4815126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp_id, 4816126258Smlaier saddr, &(*state)->gwy.addr, 4817126258Smlaier (*state)->gwy.port, NULL, 4818126258Smlaier pd2.ip_sum, icmpsum, 4819126258Smlaier pd->ip_sum, 0, AF_INET); 4820126258Smlaier } 4821126261Smlaier m_copyback(m, off, ICMP_MINLEN, 4822126261Smlaier (caddr_t)pd->hdr.icmp); 4823126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 4824126261Smlaier (caddr_t)&h2); 4825126261Smlaier m_copyback(m, off2, ICMP_MINLEN, 4826126261Smlaier (caddr_t)&iih); 4827126258Smlaier } 4828126258Smlaier 4829126258Smlaier return (PF_PASS); 4830126258Smlaier break; 4831126258Smlaier } 4832126258Smlaier#endif /* INET */ 4833126258Smlaier#ifdef INET6 4834126258Smlaier case IPPROTO_ICMPV6: { 4835126258Smlaier struct icmp6_hdr iih; 4836130613Smlaier struct pf_state key; 4837126258Smlaier 4838126258Smlaier if (!pf_pull_hdr(m, off2, &iih, 4839126258Smlaier sizeof(struct icmp6_hdr), NULL, NULL, pd2.af)) { 4840126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 4841126258Smlaier ("pf: ICMP error message too short " 4842126258Smlaier "(icmp6)\n")); 4843126258Smlaier return (PF_DROP); 4844126258Smlaier } 4845126258Smlaier 4846126258Smlaier key.af = pd2.af; 4847126258Smlaier key.proto = IPPROTO_ICMPV6; 4848130613Smlaier if (direction == PF_IN) { 4849130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4850130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4851130613Smlaier key.ext.port = iih.icmp6_id; 4852130613Smlaier key.gwy.port = iih.icmp6_id; 4853130613Smlaier } else { 4854130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4855130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 4856130613Smlaier key.lan.port = iih.icmp6_id; 4857130613Smlaier key.ext.port = iih.icmp6_id; 4858130613Smlaier } 4859126258Smlaier 4860126258Smlaier STATE_LOOKUP(); 4861126258Smlaier 4862126258Smlaier if (STATE_TRANSLATE(*state)) { 4863126258Smlaier if (direction == PF_IN) { 4864126258Smlaier pf_change_icmp(pd2.src, &iih.icmp6_id, 4865126258Smlaier daddr, &(*state)->lan.addr, 4866126258Smlaier (*state)->lan.port, NULL, 4867126258Smlaier pd2.ip_sum, icmpsum, 4868126258Smlaier pd->ip_sum, 0, AF_INET6); 4869126258Smlaier } else { 4870126258Smlaier pf_change_icmp(pd2.dst, &iih.icmp6_id, 4871126258Smlaier saddr, &(*state)->gwy.addr, 4872126258Smlaier (*state)->gwy.port, NULL, 4873126258Smlaier pd2.ip_sum, icmpsum, 4874126258Smlaier pd->ip_sum, 0, AF_INET6); 4875126258Smlaier } 4876126258Smlaier m_copyback(m, off, sizeof(struct icmp6_hdr), 4877126261Smlaier (caddr_t)pd->hdr.icmp6); 4878126261Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 4879126261Smlaier (caddr_t)&h2_6); 4880126258Smlaier m_copyback(m, off2, sizeof(struct icmp6_hdr), 4881126261Smlaier (caddr_t)&iih); 4882126258Smlaier } 4883126258Smlaier 4884126258Smlaier return (PF_PASS); 4885126258Smlaier break; 4886126258Smlaier } 4887126258Smlaier#endif /* INET6 */ 4888126258Smlaier default: { 4889130613Smlaier struct pf_state key; 4890126258Smlaier 4891126258Smlaier key.af = pd2.af; 4892126258Smlaier key.proto = pd2.proto; 4893130613Smlaier if (direction == PF_IN) { 4894130613Smlaier PF_ACPY(&key.ext.addr, pd2.dst, key.af); 4895130613Smlaier PF_ACPY(&key.gwy.addr, pd2.src, key.af); 4896130613Smlaier key.ext.port = 0; 4897130613Smlaier key.gwy.port = 0; 4898130613Smlaier } else { 4899130613Smlaier PF_ACPY(&key.lan.addr, pd2.dst, key.af); 4900130613Smlaier PF_ACPY(&key.ext.addr, pd2.src, key.af); 4901130613Smlaier key.lan.port = 0; 4902130613Smlaier key.ext.port = 0; 4903130613Smlaier } 4904126258Smlaier 4905126258Smlaier STATE_LOOKUP(); 4906126258Smlaier 4907126258Smlaier if (STATE_TRANSLATE(*state)) { 4908126258Smlaier if (direction == PF_IN) { 4909126258Smlaier pf_change_icmp(pd2.src, NULL, 4910126258Smlaier daddr, &(*state)->lan.addr, 4911126258Smlaier 0, NULL, 4912126258Smlaier pd2.ip_sum, icmpsum, 4913126258Smlaier pd->ip_sum, 0, pd2.af); 4914126258Smlaier } else { 4915126258Smlaier pf_change_icmp(pd2.dst, NULL, 4916126258Smlaier saddr, &(*state)->gwy.addr, 4917126258Smlaier 0, NULL, 4918126258Smlaier pd2.ip_sum, icmpsum, 4919126258Smlaier pd->ip_sum, 0, pd2.af); 4920126258Smlaier } 4921126258Smlaier switch (pd2.af) { 4922126258Smlaier#ifdef INET 4923126258Smlaier case AF_INET: 4924126258Smlaier m_copyback(m, off, ICMP_MINLEN, 4925126261Smlaier (caddr_t)pd->hdr.icmp); 4926126261Smlaier m_copyback(m, ipoff2, sizeof(h2), 4927126261Smlaier (caddr_t)&h2); 4928126258Smlaier break; 4929126258Smlaier#endif /* INET */ 4930126258Smlaier#ifdef INET6 4931126258Smlaier case AF_INET6: 4932126258Smlaier m_copyback(m, off, 4933126258Smlaier sizeof(struct icmp6_hdr), 4934126261Smlaier (caddr_t)pd->hdr.icmp6); 4935126258Smlaier m_copyback(m, ipoff2, sizeof(h2_6), 4936126261Smlaier (caddr_t)&h2_6); 4937126258Smlaier break; 4938126258Smlaier#endif /* INET6 */ 4939126258Smlaier } 4940126258Smlaier } 4941126258Smlaier 4942126258Smlaier return (PF_PASS); 4943126258Smlaier break; 4944126258Smlaier } 4945126258Smlaier } 4946126258Smlaier } 4947126258Smlaier} 4948126258Smlaier 4949126258Smlaierint 4950130613Smlaierpf_test_state_other(struct pf_state **state, int direction, struct pfi_kif *kif, 4951126258Smlaier struct pf_pdesc *pd) 4952126258Smlaier{ 4953126258Smlaier struct pf_state_peer *src, *dst; 4954130613Smlaier struct pf_state key; 4955126258Smlaier 4956126258Smlaier key.af = pd->af; 4957126258Smlaier key.proto = pd->proto; 4958130613Smlaier if (direction == PF_IN) { 4959130613Smlaier PF_ACPY(&key.ext.addr, pd->src, key.af); 4960130613Smlaier PF_ACPY(&key.gwy.addr, pd->dst, key.af); 4961130613Smlaier key.ext.port = 0; 4962130613Smlaier key.gwy.port = 0; 4963130613Smlaier } else { 4964130613Smlaier PF_ACPY(&key.lan.addr, pd->src, key.af); 4965130613Smlaier PF_ACPY(&key.ext.addr, pd->dst, key.af); 4966130613Smlaier key.lan.port = 0; 4967130613Smlaier key.ext.port = 0; 4968130613Smlaier } 4969126258Smlaier 4970126258Smlaier STATE_LOOKUP(); 4971126258Smlaier 4972126258Smlaier if (direction == (*state)->direction) { 4973126258Smlaier src = &(*state)->src; 4974126258Smlaier dst = &(*state)->dst; 4975126258Smlaier } else { 4976126258Smlaier src = &(*state)->dst; 4977126258Smlaier dst = &(*state)->src; 4978126258Smlaier } 4979126258Smlaier 4980126258Smlaier /* update states */ 4981126258Smlaier if (src->state < PFOTHERS_SINGLE) 4982126258Smlaier src->state = PFOTHERS_SINGLE; 4983126258Smlaier if (dst->state == PFOTHERS_SINGLE) 4984126258Smlaier dst->state = PFOTHERS_MULTIPLE; 4985126258Smlaier 4986126258Smlaier /* update expire time */ 4987127145Smlaier#ifdef __FreeBSD__ 4988126261Smlaier (*state)->expire = time_second; 4989126261Smlaier#else 4990126258Smlaier (*state)->expire = time.tv_sec; 4991126261Smlaier#endif 4992126258Smlaier if (src->state == PFOTHERS_MULTIPLE && dst->state == PFOTHERS_MULTIPLE) 4993126258Smlaier (*state)->timeout = PFTM_OTHER_MULTIPLE; 4994126258Smlaier else 4995126258Smlaier (*state)->timeout = PFTM_OTHER_SINGLE; 4996126258Smlaier 4997126258Smlaier /* translate source/destination address, if necessary */ 4998126258Smlaier if (STATE_TRANSLATE(*state)) { 4999126258Smlaier if (direction == PF_OUT) 5000126258Smlaier switch (pd->af) { 5001126258Smlaier#ifdef INET 5002126258Smlaier case AF_INET: 5003126258Smlaier pf_change_a(&pd->src->v4.s_addr, 5004126258Smlaier pd->ip_sum, (*state)->gwy.addr.v4.s_addr, 5005126258Smlaier 0); 5006126258Smlaier break; 5007126258Smlaier#endif /* INET */ 5008126258Smlaier#ifdef INET6 5009126258Smlaier case AF_INET6: 5010126258Smlaier PF_ACPY(pd->src, &(*state)->gwy.addr, pd->af); 5011126258Smlaier break; 5012126258Smlaier#endif /* INET6 */ 5013126258Smlaier } 5014126258Smlaier else 5015126258Smlaier switch (pd->af) { 5016126258Smlaier#ifdef INET 5017126258Smlaier case AF_INET: 5018126258Smlaier pf_change_a(&pd->dst->v4.s_addr, 5019126258Smlaier pd->ip_sum, (*state)->lan.addr.v4.s_addr, 5020126258Smlaier 0); 5021126258Smlaier break; 5022126258Smlaier#endif /* INET */ 5023126258Smlaier#ifdef INET6 5024126258Smlaier case AF_INET6: 5025126258Smlaier PF_ACPY(pd->dst, &(*state)->lan.addr, pd->af); 5026126258Smlaier break; 5027126258Smlaier#endif /* INET6 */ 5028126258Smlaier } 5029126258Smlaier } 5030126258Smlaier 5031126258Smlaier return (PF_PASS); 5032126258Smlaier} 5033126258Smlaier 5034126258Smlaier/* 5035126258Smlaier * ipoff and off are measured from the start of the mbuf chain. 5036126258Smlaier * h must be at "ipoff" on the mbuf chain. 5037126258Smlaier */ 5038126258Smlaiervoid * 5039126258Smlaierpf_pull_hdr(struct mbuf *m, int off, void *p, int len, 5040126258Smlaier u_short *actionp, u_short *reasonp, sa_family_t af) 5041126258Smlaier{ 5042126258Smlaier switch (af) { 5043126258Smlaier#ifdef INET 5044126258Smlaier case AF_INET: { 5045126258Smlaier struct ip *h = mtod(m, struct ip *); 5046126258Smlaier u_int16_t fragoff = (ntohs(h->ip_off) & IP_OFFMASK) << 3; 5047126258Smlaier 5048126258Smlaier if (fragoff) { 5049126258Smlaier if (fragoff >= len) 5050126258Smlaier ACTION_SET(actionp, PF_PASS); 5051126258Smlaier else { 5052126258Smlaier ACTION_SET(actionp, PF_DROP); 5053126258Smlaier REASON_SET(reasonp, PFRES_FRAG); 5054126258Smlaier } 5055126258Smlaier return (NULL); 5056126258Smlaier } 5057130613Smlaier if (m->m_pkthdr.len < off + len || 5058130613Smlaier ntohs(h->ip_len) < off + len) { 5059126258Smlaier ACTION_SET(actionp, PF_DROP); 5060126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5061126258Smlaier return (NULL); 5062126258Smlaier } 5063126258Smlaier break; 5064126258Smlaier } 5065126258Smlaier#endif /* INET */ 5066126258Smlaier#ifdef INET6 5067126258Smlaier case AF_INET6: { 5068126258Smlaier struct ip6_hdr *h = mtod(m, struct ip6_hdr *); 5069126258Smlaier 5070126258Smlaier if (m->m_pkthdr.len < off + len || 5071126258Smlaier (ntohs(h->ip6_plen) + sizeof(struct ip6_hdr)) < 5072126258Smlaier (unsigned)(off + len)) { 5073126258Smlaier ACTION_SET(actionp, PF_DROP); 5074126258Smlaier REASON_SET(reasonp, PFRES_SHORT); 5075126258Smlaier return (NULL); 5076126258Smlaier } 5077126258Smlaier break; 5078126258Smlaier } 5079126258Smlaier#endif /* INET6 */ 5080126258Smlaier } 5081126258Smlaier m_copydata(m, off, len, p); 5082126258Smlaier return (p); 5083126258Smlaier} 5084126258Smlaier 5085126258Smlaierint 5086126258Smlaierpf_routable(struct pf_addr *addr, sa_family_t af) 5087126258Smlaier{ 5088126258Smlaier struct sockaddr_in *dst; 5089126258Smlaier struct route ro; 5090126258Smlaier int ret = 0; 5091126258Smlaier 5092126258Smlaier bzero(&ro, sizeof(ro)); 5093126258Smlaier dst = satosin(&ro.ro_dst); 5094126258Smlaier dst->sin_family = af; 5095126258Smlaier dst->sin_len = sizeof(*dst); 5096126258Smlaier dst->sin_addr = addr->v4; 5097127145Smlaier#ifdef __FreeBSD__ 5098126261Smlaier#ifdef RTF_PRCLONING 5099126261Smlaier rtalloc_ign(&ro, (RTF_CLONING|RTF_PRCLONING)); 5100126261Smlaier#else /* !RTF_PRCLONING */ 5101126261Smlaier rtalloc_ign(&ro, RTF_CLONING); 5102126261Smlaier#endif 5103126261Smlaier#else /* ! __FreeBSD__ */ 5104126258Smlaier rtalloc_noclone(&ro, NO_CLONING); 5105126261Smlaier#endif 5106126258Smlaier 5107126258Smlaier if (ro.ro_rt != NULL) { 5108126258Smlaier ret = 1; 5109126258Smlaier RTFREE(ro.ro_rt); 5110126258Smlaier } 5111126258Smlaier 5112126258Smlaier return (ret); 5113126258Smlaier} 5114126258Smlaier 5115126258Smlaier#ifdef INET 5116126261Smlaier 5117126258Smlaiervoid 5118126258Smlaierpf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5119126258Smlaier struct pf_state *s) 5120126258Smlaier{ 5121126258Smlaier struct mbuf *m0, *m1; 5122126258Smlaier struct route iproute; 5123127629Smlaier struct route *ro = NULL; /* XXX: was uninitialized */ 5124126258Smlaier struct sockaddr_in *dst; 5125126258Smlaier struct ip *ip; 5126126258Smlaier struct ifnet *ifp = NULL; 5127126258Smlaier struct m_tag *mtag; 5128126258Smlaier struct pf_addr naddr; 5129130613Smlaier struct pf_src_node *sn = NULL; 5130126258Smlaier int error = 0; 5131127145Smlaier#ifdef __FreeBSD__ 5132126261Smlaier int sw_csum; 5133126261Smlaier#endif 5134126258Smlaier 5135126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5136126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5137126258Smlaier panic("pf_route: invalid parameters"); 5138126258Smlaier 5139126258Smlaier if (r->rt == PF_DUPTO) { 5140126258Smlaier m0 = *m; 5141126258Smlaier mtag = m_tag_find(m0, PACKET_TAG_PF_ROUTED, NULL); 5142126258Smlaier if (mtag == NULL) { 5143126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 0, M_NOWAIT); 5144126258Smlaier if (mtag == NULL) 5145126258Smlaier goto bad; 5146126258Smlaier m_tag_prepend(m0, mtag); 5147126258Smlaier } 5148127145Smlaier#ifdef __FreeBSD__ 5149126261Smlaier m0 = m_dup(*m, M_DONTWAIT); 5150126261Smlaier#else 5151126258Smlaier m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT); 5152126261Smlaier#endif 5153126258Smlaier if (m0 == NULL) 5154126258Smlaier return; 5155126258Smlaier } else { 5156126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 5157126258Smlaier return; 5158126258Smlaier m0 = *m; 5159126258Smlaier } 5160126258Smlaier 5161126258Smlaier if (m0->m_len < sizeof(struct ip)) 5162126258Smlaier panic("pf_route: m0->m_len < sizeof(struct ip)"); 5163126258Smlaier ip = mtod(m0, struct ip *); 5164126258Smlaier 5165126258Smlaier ro = &iproute; 5166126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 5167126258Smlaier dst = satosin(&ro->ro_dst); 5168126258Smlaier dst->sin_family = AF_INET; 5169126258Smlaier dst->sin_len = sizeof(*dst); 5170126258Smlaier dst->sin_addr = ip->ip_dst; 5171126258Smlaier 5172126258Smlaier if (r->rt == PF_FASTROUTE) { 5173126258Smlaier rtalloc(ro); 5174126258Smlaier if (ro->ro_rt == 0) { 5175126258Smlaier ipstat.ips_noroute++; 5176126258Smlaier goto bad; 5177126258Smlaier } 5178126258Smlaier 5179126258Smlaier ifp = ro->ro_rt->rt_ifp; 5180126258Smlaier ro->ro_rt->rt_use++; 5181126258Smlaier 5182126258Smlaier if (ro->ro_rt->rt_flags & RTF_GATEWAY) 5183126258Smlaier dst = satosin(ro->ro_rt->rt_gateway); 5184126258Smlaier } else { 5185126258Smlaier if (TAILQ_EMPTY(&r->rpool.list)) 5186126258Smlaier panic("pf_route: TAILQ_EMPTY(&r->rpool.list)"); 5187126258Smlaier if (s == NULL) { 5188130613Smlaier pf_map_addr(AF_INET, r, (struct pf_addr *)&ip->ip_src, 5189130613Smlaier &naddr, NULL, &sn); 5190126258Smlaier if (!PF_AZERO(&naddr, AF_INET)) 5191126258Smlaier dst->sin_addr.s_addr = naddr.v4.s_addr; 5192130613Smlaier ifp = r->rpool.cur->kif ? 5193130613Smlaier r->rpool.cur->kif->pfik_ifp : NULL; 5194126258Smlaier } else { 5195126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET)) 5196126258Smlaier dst->sin_addr.s_addr = 5197126258Smlaier s->rt_addr.v4.s_addr; 5198130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 5199126258Smlaier } 5200126258Smlaier } 5201126258Smlaier 5202126258Smlaier if (ifp == NULL) 5203126258Smlaier goto bad; 5204126258Smlaier 5205130639Smlaier if (m_tag_find(m0, PACKET_TAG_PF_ROUTED, NULL) != NULL) 5206130639Smlaier goto bad; 5207130639Smlaier mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 0, M_NOWAIT); 5208130639Smlaier if (mtag == NULL) 5209130639Smlaier goto bad; 5210130639Smlaier m_tag_prepend(m0, mtag); 5211126258Smlaier 5212130639Smlaier if (oifp != ifp) { 5213127145Smlaier#ifdef __FreeBSD__ 5214126261Smlaier PF_UNLOCK(); 5215126261Smlaier if (pf_test(PF_OUT, ifp, &m0) != PF_PASS) { 5216126261Smlaier PF_LOCK(); 5217126261Smlaier goto bad; 5218126261Smlaier } else if (m0 == NULL) { 5219126261Smlaier PF_LOCK(); 5220126261Smlaier goto done; 5221126261Smlaier } 5222126261Smlaier PF_LOCK(); 5223126261Smlaier#else 5224126258Smlaier if (pf_test(PF_OUT, ifp, &m0) != PF_PASS) 5225126258Smlaier goto bad; 5226126258Smlaier else if (m0 == NULL) 5227126258Smlaier goto done; 5228126261Smlaier#endif 5229126258Smlaier if (m0->m_len < sizeof(struct ip)) 5230126258Smlaier panic("pf_route: m0->m_len < sizeof(struct ip)"); 5231126258Smlaier ip = mtod(m0, struct ip *); 5232126258Smlaier } 5233126258Smlaier 5234127145Smlaier#ifdef __FreeBSD__ 5235126261Smlaier /* Copied from FreeBSD 5.1-CURRENT ip_output. */ 5236126261Smlaier m0->m_pkthdr.csum_flags |= CSUM_IP; 5237126261Smlaier sw_csum = m0->m_pkthdr.csum_flags & ~ifp->if_hwassist; 5238126261Smlaier if (sw_csum & CSUM_DELAY_DATA) { 5239126261Smlaier /* 5240126261Smlaier * XXX: in_delayed_cksum assumes HBO for ip->ip_len (at least) 5241126261Smlaier */ 5242126261Smlaier NTOHS(ip->ip_len); 5243126261Smlaier NTOHS(ip->ip_off); /* XXX: needed? */ 5244126261Smlaier in_delayed_cksum(m0); 5245126261Smlaier HTONS(ip->ip_len); 5246126261Smlaier HTONS(ip->ip_off); 5247126261Smlaier sw_csum &= ~CSUM_DELAY_DATA; 5248126261Smlaier } 5249126261Smlaier m0->m_pkthdr.csum_flags &= ifp->if_hwassist; 5250126261Smlaier 5251126261Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu || 5252126261Smlaier (ifp->if_hwassist & CSUM_FRAGMENT && 5253126261Smlaier ((ip->ip_off & htons(IP_DF)) == 0))) { 5254126261Smlaier /* 5255126261Smlaier * ip->ip_len = htons(ip->ip_len); 5256126261Smlaier * ip->ip_off = htons(ip->ip_off); 5257126261Smlaier */ 5258126261Smlaier ip->ip_sum = 0; 5259126261Smlaier if (sw_csum & CSUM_DELAY_IP) { 5260126261Smlaier /* From KAME */ 5261126261Smlaier if (ip->ip_v == IPVERSION && 5262126261Smlaier (ip->ip_hl << 2) == sizeof(*ip)) { 5263126261Smlaier ip->ip_sum = in_cksum_hdr(ip); 5264126261Smlaier } else { 5265126261Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5266126261Smlaier } 5267126261Smlaier } 5268126261Smlaier PF_UNLOCK(); 5269126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), ro->ro_rt); 5270126261Smlaier PF_LOCK(); 5271126261Smlaier goto done; 5272126261Smlaier } 5273126261Smlaier 5274126261Smlaier#else 5275126258Smlaier /* Copied from ip_output. */ 5276130613Smlaier#ifdef IPSEC 5277130613Smlaier /* 5278130613Smlaier * If deferred crypto processing is needed, check that the 5279130613Smlaier * interface supports it. 5280130613Smlaier */ 5281130613Smlaier if ((mtag = m_tag_find(m0, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL)) 5282130613Smlaier != NULL && (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 5283130613Smlaier /* Notify IPsec to do its own crypto. */ 5284130613Smlaier ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 5285130613Smlaier goto bad; 5286130613Smlaier } 5287130613Smlaier#endif /* IPSEC */ 5288130613Smlaier 5289130613Smlaier /* Catch routing changes wrt. hardware checksumming for TCP or UDP. */ 5290130613Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) { 5291130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_TCPv4) || 5292130613Smlaier ifp->if_bridge != NULL) { 5293130613Smlaier in_delayed_cksum(m0); 5294130613Smlaier m0->m_pkthdr.csum &= ~M_TCPV4_CSUM_OUT; /* Clear */ 5295130613Smlaier } 5296130613Smlaier } else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) { 5297130613Smlaier if (!(ifp->if_capabilities & IFCAP_CSUM_UDPv4) || 5298130613Smlaier ifp->if_bridge != NULL) { 5299130613Smlaier in_delayed_cksum(m0); 5300130613Smlaier m0->m_pkthdr.csum &= ~M_UDPV4_CSUM_OUT; /* Clear */ 5301130613Smlaier } 5302130613Smlaier } 5303130613Smlaier 5304126258Smlaier if (ntohs(ip->ip_len) <= ifp->if_mtu) { 5305126258Smlaier if ((ifp->if_capabilities & IFCAP_CSUM_IPv4) && 5306126258Smlaier ifp->if_bridge == NULL) { 5307126258Smlaier m0->m_pkthdr.csum |= M_IPV4_CSUM_OUT; 5308126258Smlaier ipstat.ips_outhwcsum++; 5309126258Smlaier } else { 5310126258Smlaier ip->ip_sum = 0; 5311126258Smlaier ip->ip_sum = in_cksum(m0, ip->ip_hl << 2); 5312126258Smlaier } 5313126258Smlaier /* Update relevant hardware checksum stats for TCP/UDP */ 5314126258Smlaier if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) 5315126258Smlaier tcpstat.tcps_outhwcsum++; 5316126258Smlaier else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) 5317126258Smlaier udpstat.udps_outhwcsum++; 5318126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), NULL); 5319126258Smlaier goto done; 5320126258Smlaier } 5321126261Smlaier#endif 5322126258Smlaier /* 5323126258Smlaier * Too large for interface; fragment if possible. 5324126258Smlaier * Must be able to put at least 8 bytes per fragment. 5325126258Smlaier */ 5326126258Smlaier if (ip->ip_off & htons(IP_DF)) { 5327126258Smlaier ipstat.ips_cantfrag++; 5328126258Smlaier if (r->rt != PF_DUPTO) { 5329127145Smlaier#ifdef __FreeBSD__ 5330126261Smlaier /* icmp_error() expects host byte ordering */ 5331126261Smlaier NTOHS(ip->ip_len); 5332126261Smlaier NTOHS(ip->ip_off); 5333126261Smlaier PF_UNLOCK(); 5334126261Smlaier#endif 5335126258Smlaier icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, 5336126258Smlaier ifp); 5337127145Smlaier#ifdef __FreeBSD__ 5338126261Smlaier PF_LOCK(); 5339126261Smlaier#endif 5340126258Smlaier goto done; 5341126258Smlaier } else 5342126258Smlaier goto bad; 5343126258Smlaier } 5344126258Smlaier 5345126258Smlaier m1 = m0; 5346127145Smlaier#ifdef __FreeBSD__ 5347126261Smlaier /* 5348126261Smlaier * XXX: is cheaper + less error prone than own function 5349126261Smlaier */ 5350126261Smlaier NTOHS(ip->ip_len); 5351126261Smlaier NTOHS(ip->ip_off); 5352126261Smlaier error = ip_fragment(ip, &m0, ifp->if_mtu, ifp->if_hwassist, sw_csum); 5353126261Smlaier#else 5354126258Smlaier error = ip_fragment(m0, ifp, ifp->if_mtu); 5355126261Smlaier#endif 5356127531Smlaier if (error) { 5357127531Smlaier#ifndef __FreeBSD__ /* ip_fragment does not do m_freem() on FreeBSD */ 5358127531Smlaier m0 = NULL; 5359126261Smlaier#endif 5360126258Smlaier goto bad; 5361127531Smlaier } 5362126258Smlaier 5363126258Smlaier for (m0 = m1; m0; m0 = m1) { 5364126258Smlaier m1 = m0->m_nextpkt; 5365126258Smlaier m0->m_nextpkt = 0; 5366127145Smlaier#ifdef __FreeBSD__ 5367126261Smlaier if (error == 0) { 5368126261Smlaier PF_UNLOCK(); 5369126261Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5370126261Smlaier NULL); 5371126261Smlaier PF_LOCK(); 5372126261Smlaier } else 5373126261Smlaier#else 5374126258Smlaier if (error == 0) 5375126258Smlaier error = (*ifp->if_output)(ifp, m0, sintosa(dst), 5376126258Smlaier NULL); 5377126258Smlaier else 5378126261Smlaier#endif 5379126258Smlaier m_freem(m0); 5380126258Smlaier } 5381126258Smlaier 5382126258Smlaier if (error == 0) 5383126258Smlaier ipstat.ips_fragmented++; 5384126258Smlaier 5385126258Smlaierdone: 5386126258Smlaier if (r->rt != PF_DUPTO) 5387126258Smlaier *m = NULL; 5388126258Smlaier if (ro == &iproute && ro->ro_rt) 5389126258Smlaier RTFREE(ro->ro_rt); 5390126258Smlaier return; 5391126258Smlaier 5392126258Smlaierbad: 5393126258Smlaier m_freem(m0); 5394126258Smlaier goto done; 5395126258Smlaier} 5396126258Smlaier#endif /* INET */ 5397126258Smlaier 5398126258Smlaier#ifdef INET6 5399126258Smlaiervoid 5400126258Smlaierpf_route6(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp, 5401126258Smlaier struct pf_state *s) 5402126258Smlaier{ 5403126258Smlaier struct mbuf *m0; 5404126258Smlaier struct m_tag *mtag; 5405126258Smlaier struct route_in6 ip6route; 5406126258Smlaier struct route_in6 *ro; 5407126258Smlaier struct sockaddr_in6 *dst; 5408126258Smlaier struct ip6_hdr *ip6; 5409126258Smlaier struct ifnet *ifp = NULL; 5410126258Smlaier struct pf_addr naddr; 5411130613Smlaier struct pf_src_node *sn = NULL; 5412126258Smlaier int error = 0; 5413126258Smlaier 5414126258Smlaier if (m == NULL || *m == NULL || r == NULL || 5415126258Smlaier (dir != PF_IN && dir != PF_OUT) || oifp == NULL) 5416126258Smlaier panic("pf_route6: invalid parameters"); 5417126258Smlaier 5418126258Smlaier if (r->rt == PF_DUPTO) { 5419126258Smlaier m0 = *m; 5420126258Smlaier mtag = m_tag_find(m0, PACKET_TAG_PF_ROUTED, NULL); 5421126258Smlaier if (mtag == NULL) { 5422126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 0, M_NOWAIT); 5423126258Smlaier if (mtag == NULL) 5424126258Smlaier goto bad; 5425126258Smlaier m_tag_prepend(m0, mtag); 5426126258Smlaier } 5427127145Smlaier#ifdef __FreeBSD__ 5428126261Smlaier m0 = m_dup(*m, M_DONTWAIT); 5429126261Smlaier#else 5430126258Smlaier m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT); 5431126261Smlaier#endif 5432126258Smlaier if (m0 == NULL) 5433126258Smlaier return; 5434126258Smlaier } else { 5435126258Smlaier if ((r->rt == PF_REPLYTO) == (r->direction == dir)) 5436126258Smlaier return; 5437126258Smlaier m0 = *m; 5438126258Smlaier } 5439126258Smlaier 5440126258Smlaier if (m0->m_len < sizeof(struct ip6_hdr)) 5441126258Smlaier panic("pf_route6: m0->m_len < sizeof(struct ip6_hdr)"); 5442126258Smlaier ip6 = mtod(m0, struct ip6_hdr *); 5443126258Smlaier 5444126258Smlaier ro = &ip6route; 5445126258Smlaier bzero((caddr_t)ro, sizeof(*ro)); 5446126258Smlaier dst = (struct sockaddr_in6 *)&ro->ro_dst; 5447126258Smlaier dst->sin6_family = AF_INET6; 5448126258Smlaier dst->sin6_len = sizeof(*dst); 5449126258Smlaier dst->sin6_addr = ip6->ip6_dst; 5450126258Smlaier 5451126258Smlaier /* Cheat. */ 5452126258Smlaier if (r->rt == PF_FASTROUTE) { 5453127145Smlaier#ifdef __FreeBSD__ 5454132280Smlaier m0->m_flags |= M_SKIP_FIREWALL; 5455126261Smlaier PF_UNLOCK(); 5456126261Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL, NULL); 5457126261Smlaier PF_LOCK(); 5458126261Smlaier#else 5459132280Smlaier mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT); 5460132280Smlaier if (mtag == NULL) 5461132280Smlaier goto bad; 5462132280Smlaier m_tag_prepend(m0, mtag); 5463126258Smlaier ip6_output(m0, NULL, NULL, 0, NULL, NULL); 5464126261Smlaier#endif 5465126258Smlaier return; 5466126258Smlaier } 5467126258Smlaier 5468126258Smlaier if (TAILQ_EMPTY(&r->rpool.list)) 5469126258Smlaier panic("pf_route6: TAILQ_EMPTY(&r->rpool.list)"); 5470126258Smlaier if (s == NULL) { 5471130613Smlaier pf_map_addr(AF_INET6, r, (struct pf_addr *)&ip6->ip6_src, 5472130613Smlaier &naddr, NULL, &sn); 5473126258Smlaier if (!PF_AZERO(&naddr, AF_INET6)) 5474126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 5475126258Smlaier &naddr, AF_INET6); 5476130613Smlaier ifp = r->rpool.cur->kif ? r->rpool.cur->kif->pfik_ifp : NULL; 5477126258Smlaier } else { 5478126258Smlaier if (!PF_AZERO(&s->rt_addr, AF_INET6)) 5479126258Smlaier PF_ACPY((struct pf_addr *)&dst->sin6_addr, 5480126258Smlaier &s->rt_addr, AF_INET6); 5481130613Smlaier ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL; 5482126258Smlaier } 5483126258Smlaier 5484126258Smlaier if (ifp == NULL) 5485126258Smlaier goto bad; 5486126258Smlaier 5487126258Smlaier if (oifp != ifp) { 5488126258Smlaier mtag = m_tag_find(m0, PACKET_TAG_PF_ROUTED, NULL); 5489126258Smlaier if (mtag == NULL) { 5490126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 0, M_NOWAIT); 5491126258Smlaier if (mtag == NULL) 5492126258Smlaier goto bad; 5493126258Smlaier m_tag_prepend(m0, mtag); 5494127145Smlaier#ifdef __FreeBSD__ 5495126261Smlaier PF_UNLOCK(); 5496126261Smlaier if (pf_test6(PF_OUT, ifp, &m0) != PF_PASS) { 5497126261Smlaier PF_LOCK(); 5498126261Smlaier goto bad; 5499126261Smlaier } else if (m0 == NULL) { 5500126261Smlaier PF_LOCK(); 5501126261Smlaier goto done; 5502126261Smlaier } 5503126261Smlaier PF_LOCK(); 5504126261Smlaier#else 5505126258Smlaier if (pf_test6(PF_OUT, ifp, &m0) != PF_PASS) 5506126258Smlaier goto bad; 5507126258Smlaier else if (m0 == NULL) 5508126258Smlaier goto done; 5509126261Smlaier#endif 5510126258Smlaier } 5511126258Smlaier } 5512126258Smlaier 5513126258Smlaier /* 5514126258Smlaier * If the packet is too large for the outgoing interface, 5515126258Smlaier * send back an icmp6 error. 5516126258Smlaier */ 5517126258Smlaier if (IN6_IS_ADDR_LINKLOCAL(&dst->sin6_addr)) 5518126258Smlaier dst->sin6_addr.s6_addr16[1] = htons(ifp->if_index); 5519126258Smlaier if ((u_long)m0->m_pkthdr.len <= ifp->if_mtu) { 5520127145Smlaier#ifdef __FreeBSD__ 5521126261Smlaier PF_UNLOCK(); 5522126261Smlaier#endif 5523126258Smlaier error = nd6_output(ifp, ifp, m0, dst, NULL); 5524127145Smlaier#ifdef __FreeBSD__ 5525126261Smlaier PF_LOCK(); 5526126261Smlaier#endif 5527126258Smlaier } else { 5528126258Smlaier in6_ifstat_inc(ifp, ifs6_in_toobig); 5529127145Smlaier#ifdef __FreeBSD__ 5530126261Smlaier if (r->rt != PF_DUPTO) { 5531126261Smlaier PF_UNLOCK(); 5532126261Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 5533126261Smlaier PF_LOCK(); 5534126261Smlaier } else 5535126261Smlaier#else 5536126258Smlaier if (r->rt != PF_DUPTO) 5537126258Smlaier icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu); 5538126258Smlaier else 5539126261Smlaier#endif 5540126258Smlaier goto bad; 5541126258Smlaier } 5542126258Smlaier 5543126258Smlaierdone: 5544126258Smlaier if (r->rt != PF_DUPTO) 5545126258Smlaier *m = NULL; 5546126258Smlaier return; 5547126258Smlaier 5548126258Smlaierbad: 5549126258Smlaier m_freem(m0); 5550126258Smlaier goto done; 5551126258Smlaier} 5552126258Smlaier#endif /* INET6 */ 5553126258Smlaier 5554126258Smlaier 5555127145Smlaier#ifdef __FreeBSD__ 5556126258Smlaier/* 5557126261Smlaier * XXX 5558126261Smlaier * FreeBSD supports cksum offload for the following drivers. 5559126261Smlaier * em(4), gx(4), lge(4), nge(4), ti(4), xl(4) 5560126261Smlaier * If we can make full use of it we would outperform ipfw/ipfilter in 5561126261Smlaier * very heavy traffic. 5562126261Smlaier * I have not tested 'cause I don't have NICs that supports cksum offload. 5563126261Smlaier * (There might be problems. Typical phenomena would be 5564126261Smlaier * 1. No route message for UDP packet. 5565126261Smlaier * 2. No connection acceptance from external hosts regardless of rule set.) 5566126261Smlaier */ 5567126261Smlaierint 5568126261Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, sa_family_t af) 5569126261Smlaier{ 5570126261Smlaier u_int16_t sum = 0; 5571126261Smlaier int hw_assist = 0; 5572126261Smlaier struct ip *ip; 5573126261Smlaier 5574126261Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 5575126261Smlaier return (1); 5576126261Smlaier if (m->m_pkthdr.len < off + len) 5577126261Smlaier return (1); 5578126261Smlaier 5579126261Smlaier switch (p) { 5580126261Smlaier case IPPROTO_TCP: 5581126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 5582126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 5583126261Smlaier sum = m->m_pkthdr.csum_data; 5584126261Smlaier } else { 5585126261Smlaier ip = mtod(m, struct ip *); 5586126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 5587126261Smlaier ip->ip_dst.s_addr, 5588126261Smlaier htonl(m->m_pkthdr.csum_data + 5589126261Smlaier IPPROTO_TCP) + ip->ip_len); 5590126261Smlaier } 5591126261Smlaier sum ^= 0xffff; 5592126261Smlaier ++hw_assist; 5593126261Smlaier } 5594126261Smlaier break; 5595126261Smlaier case IPPROTO_UDP: 5596126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 5597126261Smlaier if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) { 5598126261Smlaier sum = m->m_pkthdr.csum_data; 5599126261Smlaier } else { 5600126261Smlaier ip = mtod(m, struct ip *); 5601126261Smlaier sum = in_pseudo(ip->ip_src.s_addr, 5602126261Smlaier ip->ip_dst.s_addr, htonl((u_short)len + 5603126261Smlaier m->m_pkthdr.csum_data + IPPROTO_UDP)); 5604126261Smlaier } 5605126261Smlaier sum ^= 0xffff; 5606126261Smlaier ++hw_assist; 5607126261Smlaier } 5608126261Smlaier break; 5609126261Smlaier case IPPROTO_ICMP: 5610126261Smlaier#ifdef INET6 5611126261Smlaier case IPPROTO_ICMPV6: 5612126261Smlaier#endif /* INET6 */ 5613126261Smlaier break; 5614126261Smlaier default: 5615126261Smlaier return (1); 5616126261Smlaier } 5617126261Smlaier 5618126261Smlaier if (!hw_assist) { 5619126261Smlaier switch (af) { 5620126261Smlaier case AF_INET: 5621126261Smlaier if (p == IPPROTO_ICMP) { 5622126261Smlaier if (m->m_len < off) 5623126261Smlaier return (1); 5624126261Smlaier m->m_data += off; 5625126261Smlaier m->m_len -= off; 5626126261Smlaier sum = in_cksum(m, len); 5627126261Smlaier m->m_data -= off; 5628126261Smlaier m->m_len += off; 5629126261Smlaier } else { 5630126261Smlaier if (m->m_len < sizeof(struct ip)) 5631126261Smlaier return (1); 5632126261Smlaier sum = in4_cksum(m, p, off, len); 5633126261Smlaier if (sum == 0) { 5634126261Smlaier m->m_pkthdr.csum_flags |= 5635126261Smlaier (CSUM_DATA_VALID | 5636126261Smlaier CSUM_PSEUDO_HDR); 5637126261Smlaier m->m_pkthdr.csum_data = 0xffff; 5638126261Smlaier } 5639126261Smlaier } 5640126261Smlaier break; 5641126261Smlaier#ifdef INET6 5642126261Smlaier case AF_INET6: 5643126261Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 5644126261Smlaier return (1); 5645126261Smlaier sum = in6_cksum(m, p, off, len); 5646126261Smlaier /* 5647126261Smlaier * XXX 5648126261Smlaier * IPv6 H/W cksum off-load not supported yet! 5649126261Smlaier * 5650126261Smlaier * if (sum == 0) { 5651126261Smlaier * m->m_pkthdr.csum_flags |= 5652126261Smlaier * (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 5653126261Smlaier * m->m_pkthdr.csum_data = 0xffff; 5654126261Smlaier *} 5655126261Smlaier */ 5656126261Smlaier break; 5657126261Smlaier#endif /* INET6 */ 5658126261Smlaier default: 5659126261Smlaier return (1); 5660126261Smlaier } 5661126261Smlaier } 5662126261Smlaier if (sum) { 5663126261Smlaier switch (p) { 5664126261Smlaier case IPPROTO_TCP: 5665126261Smlaier tcpstat.tcps_rcvbadsum++; 5666126261Smlaier break; 5667126261Smlaier case IPPROTO_UDP: 5668126261Smlaier udpstat.udps_badsum++; 5669126261Smlaier break; 5670126261Smlaier case IPPROTO_ICMP: 5671126261Smlaier icmpstat.icps_checksum++; 5672126261Smlaier break; 5673126261Smlaier#ifdef INET6 5674126261Smlaier case IPPROTO_ICMPV6: 5675126261Smlaier icmp6stat.icp6s_checksum++; 5676126261Smlaier break; 5677126261Smlaier#endif /* INET6 */ 5678126261Smlaier } 5679126261Smlaier return (1); 5680126261Smlaier } 5681126261Smlaier return (0); 5682126261Smlaier} 5683126261Smlaier#else 5684126261Smlaier/* 5685126258Smlaier * check protocol (tcp/udp/icmp/icmp6) checksum and set mbuf flag 5686126258Smlaier * off is the offset where the protocol header starts 5687126258Smlaier * len is the total length of protocol header plus payload 5688126258Smlaier * returns 0 when the checksum is valid, otherwise returns 1. 5689126258Smlaier */ 5690126258Smlaierint 5691130613Smlaierpf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, 5692130613Smlaier sa_family_t af) 5693126258Smlaier{ 5694126258Smlaier u_int16_t flag_ok, flag_bad; 5695126258Smlaier u_int16_t sum; 5696126258Smlaier 5697126258Smlaier switch (p) { 5698126258Smlaier case IPPROTO_TCP: 5699126258Smlaier flag_ok = M_TCP_CSUM_IN_OK; 5700126258Smlaier flag_bad = M_TCP_CSUM_IN_BAD; 5701126258Smlaier break; 5702126258Smlaier case IPPROTO_UDP: 5703126258Smlaier flag_ok = M_UDP_CSUM_IN_OK; 5704126258Smlaier flag_bad = M_UDP_CSUM_IN_BAD; 5705126258Smlaier break; 5706126258Smlaier case IPPROTO_ICMP: 5707126258Smlaier#ifdef INET6 5708126258Smlaier case IPPROTO_ICMPV6: 5709126258Smlaier#endif /* INET6 */ 5710126258Smlaier flag_ok = flag_bad = 0; 5711126258Smlaier break; 5712126258Smlaier default: 5713126258Smlaier return (1); 5714126258Smlaier } 5715126258Smlaier if (m->m_pkthdr.csum & flag_ok) 5716126258Smlaier return (0); 5717126258Smlaier if (m->m_pkthdr.csum & flag_bad) 5718126258Smlaier return (1); 5719126258Smlaier if (off < sizeof(struct ip) || len < sizeof(struct udphdr)) 5720126258Smlaier return (1); 5721126258Smlaier if (m->m_pkthdr.len < off + len) 5722126258Smlaier return (1); 5723126258Smlaier switch (af) { 5724126258Smlaier case AF_INET: 5725126258Smlaier if (p == IPPROTO_ICMP) { 5726126258Smlaier if (m->m_len < off) 5727126258Smlaier return (1); 5728126258Smlaier m->m_data += off; 5729126258Smlaier m->m_len -= off; 5730126258Smlaier sum = in_cksum(m, len); 5731126258Smlaier m->m_data -= off; 5732126258Smlaier m->m_len += off; 5733126258Smlaier } else { 5734126258Smlaier if (m->m_len < sizeof(struct ip)) 5735126258Smlaier return (1); 5736126258Smlaier sum = in4_cksum(m, p, off, len); 5737126258Smlaier } 5738126258Smlaier break; 5739126258Smlaier#ifdef INET6 5740126258Smlaier case AF_INET6: 5741126258Smlaier if (m->m_len < sizeof(struct ip6_hdr)) 5742126258Smlaier return (1); 5743126258Smlaier sum = in6_cksum(m, p, off, len); 5744126258Smlaier break; 5745126258Smlaier#endif /* INET6 */ 5746126258Smlaier default: 5747126258Smlaier return (1); 5748126258Smlaier } 5749126258Smlaier if (sum) { 5750126258Smlaier m->m_pkthdr.csum |= flag_bad; 5751126258Smlaier switch (p) { 5752126258Smlaier case IPPROTO_TCP: 5753126258Smlaier tcpstat.tcps_rcvbadsum++; 5754126258Smlaier break; 5755126258Smlaier case IPPROTO_UDP: 5756126258Smlaier udpstat.udps_badsum++; 5757126258Smlaier break; 5758126258Smlaier case IPPROTO_ICMP: 5759126258Smlaier icmpstat.icps_checksum++; 5760126258Smlaier break; 5761126258Smlaier#ifdef INET6 5762126258Smlaier case IPPROTO_ICMPV6: 5763126258Smlaier icmp6stat.icp6s_checksum++; 5764126258Smlaier break; 5765126258Smlaier#endif /* INET6 */ 5766126258Smlaier } 5767126258Smlaier return (1); 5768126258Smlaier } 5769126258Smlaier m->m_pkthdr.csum |= flag_ok; 5770126258Smlaier return (0); 5771126258Smlaier} 5772126261Smlaier#endif 5773126258Smlaier 5774130613Smlaierstatic int 5775130613Smlaierpf_add_mbuf_tag(struct mbuf *m, u_int tag) 5776130613Smlaier{ 5777130613Smlaier struct m_tag *mtag; 5778130613Smlaier 5779130613Smlaier if (m_tag_find(m, tag, NULL) != NULL) 5780130613Smlaier return (0); 5781130613Smlaier mtag = m_tag_get(tag, 0, M_NOWAIT); 5782130613Smlaier if (mtag == NULL) 5783130613Smlaier return (1); 5784130613Smlaier m_tag_prepend(m, mtag); 5785130613Smlaier return (0); 5786130613Smlaier} 5787130613Smlaier 5788126258Smlaier#ifdef INET 5789126258Smlaierint 5790126258Smlaierpf_test(int dir, struct ifnet *ifp, struct mbuf **m0) 5791126258Smlaier{ 5792130613Smlaier struct pfi_kif *kif; 5793130613Smlaier u_short action, reason = 0, log = 0; 5794130613Smlaier struct mbuf *m = *m0; 5795130613Smlaier struct ip *h = NULL; /* make the compiler happy */ 5796130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 5797130613Smlaier struct pf_state *s = NULL; 5798130613Smlaier struct pf_ruleset *ruleset = NULL; 5799130613Smlaier struct pf_pdesc pd; 5800130613Smlaier int off, dirndx, pqid = 0; 5801126258Smlaier 5802127145Smlaier#ifdef __FreeBSD__ 5803126261Smlaier PF_LOCK(); 5804126261Smlaier#endif 5805126258Smlaier if (!pf_status.running || 5806127145Smlaier#ifdef __FreeBSD__ 5807132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 5808126261Smlaier PF_UNLOCK(); 5809132280Smlaier#else 5810132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 5811126261Smlaier#endif 5812126261Smlaier return (PF_PASS); 5813126261Smlaier } 5814126258Smlaier 5815130613Smlaier kif = pfi_index2kif[ifp->if_index]; 5816130613Smlaier if (kif == NULL) { 5817130613Smlaier#ifdef __FreeBSD__ 5818130613Smlaier PF_UNLOCK(); 5819130613Smlaier#endif 5820130613Smlaier return (PF_DROP); 5821130613Smlaier } 5822130613Smlaier 5823130613Smlaier#ifdef __FreeBSD__ 5824126261Smlaier M_ASSERTPKTHDR(m); 5825126261Smlaier#else 5826126258Smlaier#ifdef DIAGNOSTIC 5827126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 5828126258Smlaier panic("non-M_PKTHDR is passed to pf_test"); 5829126258Smlaier#endif 5830126261Smlaier#endif 5831126258Smlaier 5832130613Smlaier memset(&pd, 0, sizeof(pd)); 5833126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 5834126258Smlaier action = PF_DROP; 5835126258Smlaier REASON_SET(&reason, PFRES_SHORT); 5836126258Smlaier log = 1; 5837126258Smlaier goto done; 5838126258Smlaier } 5839126258Smlaier 5840126258Smlaier /* We do IP header normalization and packet reassembly here */ 5841130613Smlaier if (pf_normalize_ip(m0, dir, kif, &reason) != PF_PASS) { 5842126258Smlaier action = PF_DROP; 5843126258Smlaier goto done; 5844126258Smlaier } 5845126258Smlaier m = *m0; 5846126258Smlaier h = mtod(m, struct ip *); 5847126258Smlaier 5848126258Smlaier off = h->ip_hl << 2; 5849126258Smlaier if (off < (int)sizeof(*h)) { 5850126258Smlaier action = PF_DROP; 5851126258Smlaier REASON_SET(&reason, PFRES_SHORT); 5852126258Smlaier log = 1; 5853126258Smlaier goto done; 5854126258Smlaier } 5855126258Smlaier 5856126258Smlaier pd.src = (struct pf_addr *)&h->ip_src; 5857126258Smlaier pd.dst = (struct pf_addr *)&h->ip_dst; 5858130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET); 5859126258Smlaier pd.ip_sum = &h->ip_sum; 5860126258Smlaier pd.proto = h->ip_p; 5861126258Smlaier pd.af = AF_INET; 5862126258Smlaier pd.tos = h->ip_tos; 5863126258Smlaier pd.tot_len = ntohs(h->ip_len); 5864126258Smlaier 5865126258Smlaier /* handle fragments that didn't get reassembled by normalization */ 5866126258Smlaier if (h->ip_off & htons(IP_MF | IP_OFFMASK)) { 5867130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 5868126258Smlaier &pd, &a, &ruleset); 5869126258Smlaier goto done; 5870126258Smlaier } 5871126258Smlaier 5872126258Smlaier switch (h->ip_p) { 5873126258Smlaier 5874126258Smlaier case IPPROTO_TCP: { 5875126258Smlaier struct tcphdr th; 5876126258Smlaier 5877126258Smlaier pd.hdr.tcp = &th; 5878126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 5879126258Smlaier &action, &reason, AF_INET)) { 5880126258Smlaier log = action != PF_PASS; 5881126258Smlaier goto done; 5882126258Smlaier } 5883126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 5884126258Smlaier ntohs(h->ip_len) - off, IPPROTO_TCP, AF_INET)) { 5885126258Smlaier action = PF_DROP; 5886126258Smlaier goto done; 5887126258Smlaier } 5888126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 5889126258Smlaier if ((th.th_flags & TH_ACK) && pd.p_len == 0) 5890126258Smlaier pqid = 1; 5891130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 5892126258Smlaier if (action == PF_DROP) 5893130613Smlaier goto done; 5894130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 5895126258Smlaier &reason); 5896126258Smlaier if (action == PF_PASS) { 5897130613Smlaier#if NPFSYNC 5898130613Smlaier pfsync_update_state(s); 5899130613Smlaier#endif 5900126258Smlaier r = s->rule.ptr; 5901130613Smlaier a = s->anchor.ptr; 5902126258Smlaier log = s->log; 5903126258Smlaier } else if (s == NULL) 5904130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 5905130613Smlaier m, off, h, &pd, &a, &ruleset); 5906126258Smlaier break; 5907126258Smlaier } 5908126258Smlaier 5909126258Smlaier case IPPROTO_UDP: { 5910126258Smlaier struct udphdr uh; 5911126258Smlaier 5912126258Smlaier pd.hdr.udp = &uh; 5913126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 5914126258Smlaier &action, &reason, AF_INET)) { 5915126258Smlaier log = action != PF_PASS; 5916126258Smlaier goto done; 5917126258Smlaier } 5918126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 5919126258Smlaier off, ntohs(h->ip_len) - off, IPPROTO_UDP, AF_INET)) { 5920126258Smlaier action = PF_DROP; 5921126258Smlaier goto done; 5922126258Smlaier } 5923130613Smlaier if (uh.uh_dport == 0 || 5924130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 5925130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 5926130613Smlaier action = PF_DROP; 5927130613Smlaier goto done; 5928130613Smlaier } 5929130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 5930126258Smlaier if (action == PF_PASS) { 5931130613Smlaier#if NPFSYNC 5932130613Smlaier pfsync_update_state(s); 5933130613Smlaier#endif 5934126258Smlaier r = s->rule.ptr; 5935126258Smlaier a = s->anchor.ptr; 5936126258Smlaier log = s->log; 5937126258Smlaier } else if (s == NULL) 5938130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 5939130613Smlaier m, off, h, &pd, &a, &ruleset); 5940126258Smlaier break; 5941126258Smlaier } 5942126258Smlaier 5943126258Smlaier case IPPROTO_ICMP: { 5944126258Smlaier struct icmp ih; 5945126258Smlaier 5946126258Smlaier pd.hdr.icmp = &ih; 5947126258Smlaier if (!pf_pull_hdr(m, off, &ih, ICMP_MINLEN, 5948126258Smlaier &action, &reason, AF_INET)) { 5949126258Smlaier log = action != PF_PASS; 5950126258Smlaier goto done; 5951126258Smlaier } 5952126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 5953126258Smlaier ntohs(h->ip_len) - off, IPPROTO_ICMP, AF_INET)) { 5954126258Smlaier action = PF_DROP; 5955126258Smlaier goto done; 5956126258Smlaier } 5957130613Smlaier action = pf_test_state_icmp(&s, dir, kif, m, off, h, &pd); 5958126258Smlaier if (action == PF_PASS) { 5959130613Smlaier#if NPFSYNC 5960130613Smlaier pfsync_update_state(s); 5961130613Smlaier#endif 5962126258Smlaier r = s->rule.ptr; 5963126258Smlaier a = s->anchor.ptr; 5964126258Smlaier log = s->log; 5965126258Smlaier } else if (s == NULL) 5966130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 5967130613Smlaier m, off, h, &pd, &a, &ruleset); 5968126258Smlaier break; 5969126258Smlaier } 5970126258Smlaier 5971126258Smlaier default: 5972130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 5973126258Smlaier if (action == PF_PASS) { 5974130613Smlaier#if NPFSYNC 5975130613Smlaier pfsync_update_state(s); 5976130613Smlaier#endif 5977126258Smlaier r = s->rule.ptr; 5978126258Smlaier a = s->anchor.ptr; 5979126258Smlaier log = s->log; 5980126258Smlaier } else if (s == NULL) 5981130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 5982126258Smlaier &pd, &a, &ruleset); 5983126258Smlaier break; 5984126258Smlaier } 5985126258Smlaier 5986126258Smlaierdone: 5987126258Smlaier if (action == PF_PASS && h->ip_hl > 5 && 5988126258Smlaier !((s && s->allow_opts) || r->allow_opts)) { 5989126258Smlaier action = PF_DROP; 5990126258Smlaier REASON_SET(&reason, PFRES_SHORT); 5991126258Smlaier log = 1; 5992126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 5993126258Smlaier ("pf: dropping packet with ip options\n")); 5994126258Smlaier } 5995126258Smlaier 5996126258Smlaier#ifdef ALTQ 5997126258Smlaier if (action == PF_PASS && r->qid) { 5998126258Smlaier struct m_tag *mtag; 5999126258Smlaier struct altq_tag *atag; 6000126258Smlaier 6001126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 6002126258Smlaier if (mtag != NULL) { 6003126258Smlaier atag = (struct altq_tag *)(mtag + 1); 6004126258Smlaier if (pqid || pd.tos == IPTOS_LOWDELAY) 6005126258Smlaier atag->qid = r->pqid; 6006126258Smlaier else 6007126258Smlaier atag->qid = r->qid; 6008126258Smlaier /* add hints for ecn */ 6009126258Smlaier atag->af = AF_INET; 6010126258Smlaier atag->hdr = h; 6011126258Smlaier m_tag_prepend(m, mtag); 6012126258Smlaier } 6013126258Smlaier } 6014126258Smlaier#endif 6015126258Smlaier 6016130613Smlaier /* 6017130613Smlaier * connections redirected to loopback should not match sockets 6018130613Smlaier * bound specifically to loopback due to security implications, 6019130613Smlaier * see tcp_input() and in_pcblookup_listen(). 6020130613Smlaier */ 6021130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 6022130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 6023130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 6024130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 6025130613Smlaier (ntohl(pd.dst->v4.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET && 6026130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 6027130613Smlaier action = PF_DROP; 6028130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 6029130613Smlaier } 6030130613Smlaier 6031126258Smlaier if (log) 6032130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET, dir, reason, r, a, ruleset); 6033126258Smlaier 6034130613Smlaier kif->pfik_bytes[0][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 6035130613Smlaier kif->pfik_packets[0][dir == PF_OUT][action != PF_PASS]++; 6036130613Smlaier 6037130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 6038130613Smlaier r->packets++; 6039130613Smlaier r->bytes += pd.tot_len; 6040130613Smlaier if (a != NULL) { 6041130613Smlaier a->packets++; 6042130613Smlaier a->bytes += pd.tot_len; 6043130613Smlaier } 6044130613Smlaier if (s != NULL) { 6045130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 6046130613Smlaier s->packets[dirndx]++; 6047130613Smlaier s->bytes[dirndx] += pd.tot_len; 6048130613Smlaier if (s->nat_rule.ptr != NULL) { 6049130613Smlaier s->nat_rule.ptr->packets++; 6050130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 6051130613Smlaier } 6052130613Smlaier if (s->src_node != NULL) { 6053130613Smlaier s->src_node->packets++; 6054130613Smlaier s->src_node->bytes += pd.tot_len; 6055130613Smlaier } 6056130613Smlaier if (s->nat_src_node != NULL) { 6057130613Smlaier s->nat_src_node->packets++; 6058130613Smlaier s->nat_src_node->bytes += pd.tot_len; 6059130613Smlaier } 6060130613Smlaier } 6061130613Smlaier tr = r; 6062130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 6063130613Smlaier if (nr != NULL) { 6064130613Smlaier struct pf_addr *x; 6065130613Smlaier /* 6066130613Smlaier * XXX: we need to make sure that the addresses 6067130613Smlaier * passed to pfr_update_stats() are the same than 6068130613Smlaier * the addresses used during matching (pfr_match) 6069130613Smlaier */ 6070130613Smlaier if (r == &pf_default_rule) { 6071130613Smlaier tr = nr; 6072130613Smlaier x = (s == NULL || s->direction == dir) ? 6073130613Smlaier &pd.baddr : &pd.naddr; 6074130613Smlaier } else 6075130613Smlaier x = (s == NULL || s->direction == dir) ? 6076130613Smlaier &pd.naddr : &pd.baddr; 6077130613Smlaier if (x == &pd.baddr || s == NULL) { 6078130613Smlaier /* we need to change the address */ 6079130613Smlaier if (dir == PF_OUT) 6080130613Smlaier pd.src = x; 6081130613Smlaier else 6082130613Smlaier pd.dst = x; 6083130613Smlaier } 6084130613Smlaier } 6085130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 6086130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 6087130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 6088130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6089130613Smlaier tr->src.not); 6090130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 6091130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 6092130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 6093130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6094130613Smlaier tr->dst.not); 6095130613Smlaier } 6096130613Smlaier 6097130613Smlaier 6098126258Smlaier if (action == PF_SYNPROXY_DROP) { 6099126258Smlaier m_freem(*m0); 6100126258Smlaier *m0 = NULL; 6101126258Smlaier action = PF_PASS; 6102126258Smlaier } else if (r->rt) 6103126258Smlaier /* pf_route can free the mbuf causing *m0 to become NULL */ 6104126258Smlaier pf_route(m0, r, dir, ifp, s); 6105126258Smlaier 6106127145Smlaier#ifdef __FreeBSD__ 6107126261Smlaier PF_UNLOCK(); 6108126261Smlaier#endif 6109126261Smlaier 6110126258Smlaier return (action); 6111126258Smlaier} 6112126258Smlaier#endif /* INET */ 6113126258Smlaier 6114126258Smlaier#ifdef INET6 6115126258Smlaierint 6116126258Smlaierpf_test6(int dir, struct ifnet *ifp, struct mbuf **m0) 6117126258Smlaier{ 6118130613Smlaier struct pfi_kif *kif; 6119130613Smlaier u_short action, reason = 0, log = 0; 6120130613Smlaier struct mbuf *m = *m0; 6121130613Smlaier struct ip6_hdr *h = NULL; /* make the compiler happy */ 6122130613Smlaier struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr; 6123130613Smlaier struct pf_state *s = NULL; 6124130613Smlaier struct pf_ruleset *ruleset = NULL; 6125130613Smlaier struct pf_pdesc pd; 6126130613Smlaier int off, terminal = 0, dirndx; 6127126258Smlaier 6128127145Smlaier#ifdef __FreeBSD__ 6129126261Smlaier PF_LOCK(); 6130126261Smlaier#endif 6131126261Smlaier 6132126258Smlaier if (!pf_status.running || 6133127145Smlaier#ifdef __FreeBSD__ 6134132280Smlaier (m->m_flags & M_SKIP_FIREWALL)) { 6135126261Smlaier PF_UNLOCK(); 6136132280Smlaier#else 6137132280Smlaier (m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) { 6138126261Smlaier#endif 6139126258Smlaier return (PF_PASS); 6140126261Smlaier } 6141126258Smlaier 6142130613Smlaier kif = pfi_index2kif[ifp->if_index]; 6143130613Smlaier if (kif == NULL) { 6144130613Smlaier#ifdef __FreeBSD__ 6145130613Smlaier PF_UNLOCK(); 6146130613Smlaier#endif 6147130613Smlaier return (PF_DROP); 6148130613Smlaier } 6149130613Smlaier 6150130613Smlaier#ifdef __FreeBSD__ 6151126261Smlaier M_ASSERTPKTHDR(m); 6152126261Smlaier#else 6153126258Smlaier#ifdef DIAGNOSTIC 6154126258Smlaier if ((m->m_flags & M_PKTHDR) == 0) 6155126258Smlaier panic("non-M_PKTHDR is passed to pf_test"); 6156126258Smlaier#endif 6157126261Smlaier#endif 6158126258Smlaier 6159130613Smlaier memset(&pd, 0, sizeof(pd)); 6160126258Smlaier if (m->m_pkthdr.len < (int)sizeof(*h)) { 6161126258Smlaier action = PF_DROP; 6162126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6163126258Smlaier log = 1; 6164126258Smlaier goto done; 6165126258Smlaier } 6166126258Smlaier 6167126258Smlaier /* We do IP header normalization and packet reassembly here */ 6168130613Smlaier if (pf_normalize_ip6(m0, dir, kif, &reason) != PF_PASS) { 6169126258Smlaier action = PF_DROP; 6170126258Smlaier goto done; 6171126258Smlaier } 6172126258Smlaier m = *m0; 6173126258Smlaier h = mtod(m, struct ip6_hdr *); 6174126258Smlaier 6175126258Smlaier pd.src = (struct pf_addr *)&h->ip6_src; 6176126258Smlaier pd.dst = (struct pf_addr *)&h->ip6_dst; 6177130613Smlaier PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET6); 6178126258Smlaier pd.ip_sum = NULL; 6179126258Smlaier pd.af = AF_INET6; 6180126258Smlaier pd.tos = 0; 6181126258Smlaier pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); 6182126258Smlaier 6183126258Smlaier off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); 6184126258Smlaier pd.proto = h->ip6_nxt; 6185126258Smlaier do { 6186126258Smlaier switch (pd.proto) { 6187126258Smlaier case IPPROTO_FRAGMENT: 6188130613Smlaier action = pf_test_fragment(&r, dir, kif, m, h, 6189126258Smlaier &pd, &a, &ruleset); 6190126258Smlaier if (action == PF_DROP) 6191126258Smlaier REASON_SET(&reason, PFRES_FRAG); 6192126258Smlaier goto done; 6193126258Smlaier case IPPROTO_AH: 6194126258Smlaier case IPPROTO_HOPOPTS: 6195126258Smlaier case IPPROTO_ROUTING: 6196126258Smlaier case IPPROTO_DSTOPTS: { 6197126258Smlaier /* get next header and header length */ 6198126258Smlaier struct ip6_ext opt6; 6199126258Smlaier 6200126258Smlaier if (!pf_pull_hdr(m, off, &opt6, sizeof(opt6), 6201126258Smlaier NULL, NULL, pd.af)) { 6202126258Smlaier DPFPRINTF(PF_DEBUG_MISC, 6203126258Smlaier ("pf: IPv6 short opt\n")); 6204126258Smlaier action = PF_DROP; 6205126258Smlaier REASON_SET(&reason, PFRES_SHORT); 6206126258Smlaier log = 1; 6207126258Smlaier goto done; 6208126258Smlaier } 6209126258Smlaier if (pd.proto == IPPROTO_AH) 6210126258Smlaier off += (opt6.ip6e_len + 2) * 4; 6211126258Smlaier else 6212126258Smlaier off += (opt6.ip6e_len + 1) * 8; 6213126258Smlaier pd.proto = opt6.ip6e_nxt; 6214126258Smlaier /* goto the next header */ 6215126258Smlaier break; 6216126258Smlaier } 6217126258Smlaier default: 6218126258Smlaier terminal++; 6219126258Smlaier break; 6220126258Smlaier } 6221126258Smlaier } while (!terminal); 6222126258Smlaier 6223126258Smlaier switch (pd.proto) { 6224126258Smlaier 6225126258Smlaier case IPPROTO_TCP: { 6226126258Smlaier struct tcphdr th; 6227126258Smlaier 6228126258Smlaier pd.hdr.tcp = &th; 6229126258Smlaier if (!pf_pull_hdr(m, off, &th, sizeof(th), 6230126258Smlaier &action, &reason, AF_INET6)) { 6231126258Smlaier log = action != PF_PASS; 6232126258Smlaier goto done; 6233126258Smlaier } 6234126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6235126258Smlaier ntohs(h->ip6_plen), IPPROTO_TCP, AF_INET6)) { 6236126258Smlaier action = PF_DROP; 6237126258Smlaier goto done; 6238126258Smlaier } 6239126258Smlaier pd.p_len = pd.tot_len - off - (th.th_off << 2); 6240130613Smlaier action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd); 6241126258Smlaier if (action == PF_DROP) 6242130613Smlaier goto done; 6243130613Smlaier action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd, 6244126258Smlaier &reason); 6245126258Smlaier if (action == PF_PASS) { 6246130613Smlaier#if NPFSYNC 6247130613Smlaier pfsync_update_state(s); 6248130613Smlaier#endif 6249126258Smlaier r = s->rule.ptr; 6250130613Smlaier a = s->anchor.ptr; 6251126258Smlaier log = s->log; 6252126258Smlaier } else if (s == NULL) 6253130613Smlaier action = pf_test_tcp(&r, &s, dir, kif, 6254130613Smlaier m, off, h, &pd, &a, &ruleset); 6255126258Smlaier break; 6256126258Smlaier } 6257126258Smlaier 6258126258Smlaier case IPPROTO_UDP: { 6259126258Smlaier struct udphdr uh; 6260126258Smlaier 6261126258Smlaier pd.hdr.udp = &uh; 6262126258Smlaier if (!pf_pull_hdr(m, off, &uh, sizeof(uh), 6263126258Smlaier &action, &reason, AF_INET6)) { 6264126258Smlaier log = action != PF_PASS; 6265126258Smlaier goto done; 6266126258Smlaier } 6267126258Smlaier if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m, 6268126258Smlaier off, ntohs(h->ip6_plen), IPPROTO_UDP, AF_INET6)) { 6269126258Smlaier action = PF_DROP; 6270126258Smlaier goto done; 6271126258Smlaier } 6272130613Smlaier if (uh.uh_dport == 0 || 6273130613Smlaier ntohs(uh.uh_ulen) > m->m_pkthdr.len - off || 6274130613Smlaier ntohs(uh.uh_ulen) < sizeof(struct udphdr)) { 6275130613Smlaier action = PF_DROP; 6276130613Smlaier goto done; 6277130613Smlaier } 6278130613Smlaier action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd); 6279126258Smlaier if (action == PF_PASS) { 6280130613Smlaier#if NPFSYNC 6281130613Smlaier pfsync_update_state(s); 6282130613Smlaier#endif 6283126258Smlaier r = s->rule.ptr; 6284130613Smlaier a = s->anchor.ptr; 6285126258Smlaier log = s->log; 6286126258Smlaier } else if (s == NULL) 6287130613Smlaier action = pf_test_udp(&r, &s, dir, kif, 6288130613Smlaier m, off, h, &pd, &a, &ruleset); 6289126258Smlaier break; 6290126258Smlaier } 6291126258Smlaier 6292126258Smlaier case IPPROTO_ICMPV6: { 6293126258Smlaier struct icmp6_hdr ih; 6294126258Smlaier 6295126258Smlaier pd.hdr.icmp6 = &ih; 6296126258Smlaier if (!pf_pull_hdr(m, off, &ih, sizeof(ih), 6297126258Smlaier &action, &reason, AF_INET6)) { 6298126258Smlaier log = action != PF_PASS; 6299126258Smlaier goto done; 6300126258Smlaier } 6301126258Smlaier if (dir == PF_IN && pf_check_proto_cksum(m, off, 6302126258Smlaier ntohs(h->ip6_plen), IPPROTO_ICMPV6, AF_INET6)) { 6303126258Smlaier action = PF_DROP; 6304126258Smlaier goto done; 6305126258Smlaier } 6306130613Smlaier action = pf_test_state_icmp(&s, dir, kif, 6307130613Smlaier m, off, h, &pd); 6308126258Smlaier if (action == PF_PASS) { 6309130613Smlaier#if NPFSYNC 6310130613Smlaier pfsync_update_state(s); 6311130613Smlaier#endif 6312126258Smlaier r = s->rule.ptr; 6313130613Smlaier a = s->anchor.ptr; 6314126258Smlaier log = s->log; 6315126258Smlaier } else if (s == NULL) 6316130613Smlaier action = pf_test_icmp(&r, &s, dir, kif, 6317130613Smlaier m, off, h, &pd, &a, &ruleset); 6318126258Smlaier break; 6319126258Smlaier } 6320126258Smlaier 6321126258Smlaier default: 6322130613Smlaier action = pf_test_state_other(&s, dir, kif, &pd); 6323130613Smlaier if (action == PF_PASS) { 6324130613Smlaier r = s->rule.ptr; 6325130613Smlaier a = s->anchor.ptr; 6326130613Smlaier log = s->log; 6327130613Smlaier } else if (s == NULL) 6328130613Smlaier action = pf_test_other(&r, &s, dir, kif, m, off, h, 6329130613Smlaier &pd, &a, &ruleset); 6330126258Smlaier break; 6331126258Smlaier } 6332126258Smlaier 6333126258Smlaierdone: 6334126258Smlaier /* XXX handle IPv6 options, if not allowed. not implemented. */ 6335126258Smlaier 6336126258Smlaier#ifdef ALTQ 6337126258Smlaier if (action == PF_PASS && r->qid) { 6338126258Smlaier struct m_tag *mtag; 6339126258Smlaier struct altq_tag *atag; 6340126258Smlaier 6341126258Smlaier mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT); 6342126258Smlaier if (mtag != NULL) { 6343126258Smlaier atag = (struct altq_tag *)(mtag + 1); 6344126258Smlaier if (pd.tos == IPTOS_LOWDELAY) 6345126258Smlaier atag->qid = r->pqid; 6346126258Smlaier else 6347126258Smlaier atag->qid = r->qid; 6348126258Smlaier /* add hints for ecn */ 6349126258Smlaier atag->af = AF_INET6; 6350126258Smlaier atag->hdr = h; 6351126258Smlaier m_tag_prepend(m, mtag); 6352126258Smlaier } 6353126258Smlaier } 6354126258Smlaier#endif 6355126258Smlaier 6356130613Smlaier if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP || 6357130613Smlaier pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL && 6358130613Smlaier (s->nat_rule.ptr->action == PF_RDR || 6359130613Smlaier s->nat_rule.ptr->action == PF_BINAT) && 6360130613Smlaier IN6_IS_ADDR_LOOPBACK(&pd.dst->v6) && 6361130613Smlaier pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) { 6362130613Smlaier action = PF_DROP; 6363130613Smlaier REASON_SET(&reason, PFRES_MEMORY); 6364130613Smlaier } 6365130613Smlaier 6366126258Smlaier if (log) 6367130613Smlaier PFLOG_PACKET(kif, h, m, AF_INET6, dir, reason, r, a, ruleset); 6368126258Smlaier 6369130613Smlaier kif->pfik_bytes[1][dir == PF_OUT][action != PF_PASS] += pd.tot_len; 6370130613Smlaier kif->pfik_packets[1][dir == PF_OUT][action != PF_PASS]++; 6371130613Smlaier 6372130613Smlaier if (action == PF_PASS || r->action == PF_DROP) { 6373130613Smlaier r->packets++; 6374130613Smlaier r->bytes += pd.tot_len; 6375130613Smlaier if (a != NULL) { 6376130613Smlaier a->packets++; 6377130613Smlaier a->bytes += pd.tot_len; 6378130613Smlaier } 6379130613Smlaier if (s != NULL) { 6380130613Smlaier dirndx = (dir == s->direction) ? 0 : 1; 6381130613Smlaier s->packets[dirndx]++; 6382130613Smlaier s->bytes[dirndx] += pd.tot_len; 6383130613Smlaier if (s->nat_rule.ptr != NULL) { 6384130613Smlaier s->nat_rule.ptr->packets++; 6385130613Smlaier s->nat_rule.ptr->bytes += pd.tot_len; 6386130613Smlaier } 6387130613Smlaier if (s->src_node != NULL) { 6388130613Smlaier s->src_node->packets++; 6389130613Smlaier s->src_node->bytes += pd.tot_len; 6390130613Smlaier } 6391130613Smlaier if (s->nat_src_node != NULL) { 6392130613Smlaier s->nat_src_node->packets++; 6393130613Smlaier s->nat_src_node->bytes += pd.tot_len; 6394130613Smlaier } 6395130613Smlaier } 6396130613Smlaier tr = r; 6397130613Smlaier nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule; 6398130613Smlaier if (nr != NULL) { 6399130613Smlaier struct pf_addr *x; 6400130613Smlaier /* 6401130613Smlaier * XXX: we need to make sure that the addresses 6402130613Smlaier * passed to pfr_update_stats() are the same than 6403130613Smlaier * the addresses used during matching (pfr_match) 6404130613Smlaier */ 6405130613Smlaier if (r == &pf_default_rule) { 6406130613Smlaier tr = nr; 6407130613Smlaier x = (s == NULL || s->direction == dir) ? 6408130613Smlaier &pd.baddr : &pd.naddr; 6409130613Smlaier } else { 6410130613Smlaier x = (s == NULL || s->direction == dir) ? 6411130613Smlaier &pd.naddr : &pd.baddr; 6412130613Smlaier } 6413130613Smlaier if (x == &pd.baddr || s == NULL) { 6414130613Smlaier if (dir == PF_OUT) 6415130613Smlaier pd.src = x; 6416130613Smlaier else 6417130613Smlaier pd.dst = x; 6418130613Smlaier } 6419130613Smlaier } 6420130613Smlaier if (tr->src.addr.type == PF_ADDR_TABLE) 6421130613Smlaier pfr_update_stats(tr->src.addr.p.tbl, (s == NULL || 6422130613Smlaier s->direction == dir) ? pd.src : pd.dst, pd.af, 6423130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6424130613Smlaier tr->src.not); 6425130613Smlaier if (tr->dst.addr.type == PF_ADDR_TABLE) 6426130613Smlaier pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL || 6427130613Smlaier s->direction == dir) ? pd.dst : pd.src, pd.af, 6428130613Smlaier pd.tot_len, dir == PF_OUT, r->action == PF_PASS, 6429130613Smlaier tr->dst.not); 6430130613Smlaier } 6431130613Smlaier 6432130613Smlaier 6433126258Smlaier if (action == PF_SYNPROXY_DROP) { 6434126258Smlaier m_freem(*m0); 6435126258Smlaier *m0 = NULL; 6436126258Smlaier action = PF_PASS; 6437126258Smlaier } else if (r->rt) 6438126258Smlaier /* pf_route6 can free the mbuf causing *m0 to become NULL */ 6439126258Smlaier pf_route6(m0, r, dir, ifp, s); 6440126258Smlaier 6441127145Smlaier#ifdef __FreeBSD__ 6442126261Smlaier PF_UNLOCK(); 6443126261Smlaier#endif 6444126258Smlaier return (action); 6445126258Smlaier} 6446126258Smlaier#endif /* INET6 */ 6447