1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Daniel Hartmeier 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * - Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following 15 * disclaimer in the documentation and/or other materials provided 16 * with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $OpenBSD: pfvar.h,v 1.282 2009/01/29 15:12:28 pyr Exp $ 32 * $FreeBSD$ 33 */ 34 35 #ifndef _NET_PF_H_ 36 #define _NET_PF_H_ 37 38 #include <sys/tree.h> 39 40 #define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0) 41 #define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1) 42 43 #define PF_MD5_DIGEST_LENGTH 16 44 #ifdef MD5_DIGEST_LENGTH 45 #if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH 46 #error 47 #endif 48 #endif 49 50 enum { PF_INOUT, PF_IN, PF_OUT }; 51 enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT, 52 PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP, PF_DEFER }; 53 enum { PF_RULESET_SCRUB, PF_RULESET_FILTER, PF_RULESET_NAT, 54 PF_RULESET_BINAT, PF_RULESET_RDR, PF_RULESET_MAX }; 55 enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT, 56 PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG }; 57 enum { PF_DEBUG_NONE, PF_DEBUG_URGENT, PF_DEBUG_MISC, PF_DEBUG_NOISY }; 58 enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL, 59 PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER, 60 PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET }; 61 enum { PF_GET_NONE, PF_GET_CLR_CNTR }; 62 enum { PF_SK_WIRE, PF_SK_STACK, PF_SK_BOTH }; 63 64 /* 65 * Note about PFTM_*: real indices into pf_rule.timeout[] come before 66 * PFTM_MAX, special cases afterwards. See pf_state_expires(). 67 */ 68 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED, 69 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED, 70 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE, 71 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY, 72 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE, 73 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL, 74 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE, 75 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED }; 76 77 /* PFTM default values */ 78 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 79 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 80 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 81 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 82 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 83 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 84 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 85 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 86 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 87 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 88 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 89 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 90 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 91 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 92 #define PFTM_FRAG_VAL 30 /* Fragment expire */ 93 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 94 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 95 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 96 97 enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 98 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 99 PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX }; 100 #define PF_POOL_IDMASK 0x0f 101 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 102 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN }; 103 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 104 PF_ADDR_TABLE, PF_ADDR_URPFFAILED, 105 PF_ADDR_RANGE }; 106 #define PF_POOL_TYPEMASK 0x0f 107 #define PF_POOL_STICKYADDR 0x20 108 #define PF_WSCALE_FLAG 0x80 109 #define PF_WSCALE_MASK 0x0f 110 111 #define PF_LOG 0x01 112 #define PF_LOG_ALL 0x02 113 #define PF_LOG_SOCKET_LOOKUP 0x04 114 115 /* Reasons code for passing/dropping a packet */ 116 #define PFRES_MATCH 0 /* Explicit match of a rule */ 117 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 118 #define PFRES_FRAG 2 /* Dropping following fragment */ 119 #define PFRES_SHORT 3 /* Dropping short packet */ 120 #define PFRES_NORM 4 /* Dropping by normalizer */ 121 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 122 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 123 #define PFRES_CONGEST 7 /* Congestion (of ipintrq) */ 124 #define PFRES_IPOPTIONS 8 /* IP option */ 125 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 126 #define PFRES_BADSTATE 10 /* State mismatch */ 127 #define PFRES_STATEINS 11 /* State insertion failure */ 128 #define PFRES_MAXSTATES 12 /* State limit */ 129 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 130 #define PFRES_SYNPROXY 14 /* SYN proxy */ 131 #define PFRES_MAPFAILED 15 /* pf_map_addr() failed */ 132 #define PFRES_MAX 16 /* total+1 */ 133 134 #define PFRES_NAMES { \ 135 "match", \ 136 "bad-offset", \ 137 "fragment", \ 138 "short", \ 139 "normalize", \ 140 "memory", \ 141 "bad-timestamp", \ 142 "congestion", \ 143 "ip-option", \ 144 "proto-cksum", \ 145 "state-mismatch", \ 146 "state-insert", \ 147 "state-limit", \ 148 "src-limit", \ 149 "synproxy", \ 150 "map-failed", \ 151 NULL \ 152 } 153 154 /* Counters for other things we want to keep track of */ 155 #define LCNT_STATES 0 /* states */ 156 #define LCNT_SRCSTATES 1 /* max-src-states */ 157 #define LCNT_SRCNODES 2 /* max-src-nodes */ 158 #define LCNT_SRCCONN 3 /* max-src-conn */ 159 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 160 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 161 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 162 #define LCNT_MAX 7 /* total+1 */ 163 164 #define LCNT_NAMES { \ 165 "max states per rule", \ 166 "max-src-states", \ 167 "max-src-nodes", \ 168 "max-src-conn", \ 169 "max-src-conn-rate", \ 170 "overload table insertion", \ 171 "overload flush states", \ 172 NULL \ 173 } 174 175 /* state operation counters */ 176 #define FCNT_STATE_SEARCH 0 177 #define FCNT_STATE_INSERT 1 178 #define FCNT_STATE_REMOVALS 2 179 #define FCNT_MAX 3 180 181 /* src_node operation counters */ 182 #define SCNT_SRC_NODE_SEARCH 0 183 #define SCNT_SRC_NODE_INSERT 1 184 #define SCNT_SRC_NODE_REMOVALS 2 185 #define SCNT_MAX 3 186 187 #define PF_TABLE_NAME_SIZE 32 188 #define PF_QNAME_SIZE 64 189 190 struct pf_rule; 191 192 /* keep synced with pfi_kif, used in RB_FIND */ 193 struct pfi_kif_cmp { 194 char pfik_name[IFNAMSIZ]; 195 }; 196 197 struct pfi_kif { 198 char pfik_name[IFNAMSIZ]; 199 union { 200 RB_ENTRY(pfi_kif) _pfik_tree; 201 LIST_ENTRY(pfi_kif) _pfik_list; 202 } _pfik_glue; 203 #define pfik_tree _pfik_glue._pfik_tree 204 #define pfik_list _pfik_glue._pfik_list 205 u_int64_t pfik_packets[2][2][2]; 206 u_int64_t pfik_bytes[2][2][2]; 207 u_int32_t pfik_tzero; 208 u_int pfik_flags; 209 struct ifnet *pfik_ifp; 210 struct ifg_group *pfik_group; 211 u_int pfik_rulerefs; 212 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 213 }; 214 215 struct pf_status { 216 uint64_t counters[PFRES_MAX]; 217 uint64_t lcounters[LCNT_MAX]; 218 uint64_t fcounters[FCNT_MAX]; 219 uint64_t scounters[SCNT_MAX]; 220 uint64_t pcounters[2][2][3]; 221 uint64_t bcounters[2][2]; 222 uint32_t running; 223 uint32_t states; 224 uint32_t src_nodes; 225 uint32_t since; 226 uint32_t debug; 227 uint32_t hostid; 228 char ifname[IFNAMSIZ]; 229 uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 230 }; 231 232 struct pf_addr { 233 union { 234 struct in_addr v4; 235 struct in6_addr v6; 236 u_int8_t addr8[16]; 237 u_int16_t addr16[8]; 238 u_int32_t addr32[4]; 239 } pfa; /* 128-bit address */ 240 #define v4 pfa.v4 241 #define v6 pfa.v6 242 #define addr8 pfa.addr8 243 #define addr16 pfa.addr16 244 #define addr32 pfa.addr32 245 }; 246 247 #define PFI_AFLAG_NETWORK 0x01 248 #define PFI_AFLAG_BROADCAST 0x02 249 #define PFI_AFLAG_PEER 0x04 250 #define PFI_AFLAG_MODEMASK 0x07 251 #define PFI_AFLAG_NOALIAS 0x08 252 253 struct pf_addr_wrap { 254 union { 255 struct { 256 struct pf_addr addr; 257 struct pf_addr mask; 258 } a; 259 char ifname[IFNAMSIZ]; 260 char tblname[PF_TABLE_NAME_SIZE]; 261 } v; 262 union { 263 struct pfi_dynaddr *dyn; 264 struct pfr_ktable *tbl; 265 int dyncnt; 266 int tblcnt; 267 } p; 268 u_int8_t type; /* PF_ADDR_* */ 269 u_int8_t iflags; /* PFI_AFLAG_* */ 270 }; 271 272 union pf_rule_ptr { 273 struct pf_rule *ptr; 274 u_int32_t nr; 275 }; 276 277 struct pf_rule_uid { 278 uid_t uid[2]; 279 u_int8_t op; 280 }; 281 282 struct pf_rule_gid { 283 uid_t gid[2]; 284 u_int8_t op; 285 }; 286 287 struct pf_rule_addr { 288 struct pf_addr_wrap addr; 289 u_int16_t port[2]; 290 u_int8_t neg; 291 u_int8_t port_op; 292 }; 293 294 struct pf_pooladdr { 295 struct pf_addr_wrap addr; 296 TAILQ_ENTRY(pf_pooladdr) entries; 297 char ifname[IFNAMSIZ]; 298 struct pfi_kif *kif; 299 }; 300 301 TAILQ_HEAD(pf_palist, pf_pooladdr); 302 303 struct pf_poolhashkey { 304 union { 305 u_int8_t key8[16]; 306 u_int16_t key16[8]; 307 u_int32_t key32[4]; 308 } pfk; /* 128-bit hash key */ 309 #define key8 pfk.key8 310 #define key16 pfk.key16 311 #define key32 pfk.key32 312 }; 313 314 struct pf_pool { 315 struct pf_palist list; 316 struct pf_pooladdr *cur; 317 struct pf_poolhashkey key; 318 struct pf_addr counter; 319 int tblidx; 320 u_int16_t proxy_port[2]; 321 u_int8_t opts; 322 }; 323 324 /* A packed Operating System description for fingerprinting */ 325 typedef u_int32_t pf_osfp_t; 326 #define PF_OSFP_ANY ((pf_osfp_t)0) 327 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 328 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 329 330 struct pf_osfp_entry { 331 SLIST_ENTRY(pf_osfp_entry) fp_entry; 332 pf_osfp_t fp_os; 333 int fp_enflags; 334 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 335 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 336 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 337 #define PF_OSFP_LEN 32 338 char fp_class_nm[PF_OSFP_LEN]; 339 char fp_version_nm[PF_OSFP_LEN]; 340 char fp_subtype_nm[PF_OSFP_LEN]; 341 }; 342 #define PF_OSFP_ENTRY_EQ(a, b) \ 343 ((a)->fp_os == (b)->fp_os && \ 344 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 345 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 346 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 347 348 /* handle pf_osfp_t packing */ 349 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 350 #define _FP_UNUSED_BITS 1 351 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 352 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 353 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 354 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 355 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 356 ((1 << _FP_CLASS_BITS) - 1); \ 357 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 358 ((1 << _FP_VERSION_BITS) - 1);\ 359 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 360 } while(0) 361 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 362 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 363 + _FP_SUBTYPE_BITS); \ 364 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 365 _FP_SUBTYPE_BITS; \ 366 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 367 } while(0) 368 369 /* the fingerprint of an OSes TCP SYN packet */ 370 typedef u_int64_t pf_tcpopts_t; 371 struct pf_os_fingerprint { 372 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 373 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 374 u_int16_t fp_wsize; /* TCP window size */ 375 u_int16_t fp_psize; /* ip->ip_len */ 376 u_int16_t fp_mss; /* TCP MSS */ 377 u_int16_t fp_flags; 378 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 379 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 380 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 381 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 382 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 383 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 384 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 385 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 386 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 387 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 388 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 389 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 390 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 391 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 392 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 393 u_int8_t fp_optcnt; /* TCP option count */ 394 u_int8_t fp_wscale; /* TCP window scaling */ 395 u_int8_t fp_ttl; /* IPv4 TTL */ 396 #define PF_OSFP_MAXTTL_OFFSET 40 397 /* TCP options packing */ 398 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 399 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 400 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 401 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 402 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 403 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 404 #define PF_OSFP_MAX_OPTS \ 405 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 406 / PF_OSFP_TCPOPT_BITS 407 408 SLIST_ENTRY(pf_os_fingerprint) fp_next; 409 }; 410 411 struct pf_osfp_ioctl { 412 struct pf_osfp_entry fp_os; 413 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 414 u_int16_t fp_wsize; /* TCP window size */ 415 u_int16_t fp_psize; /* ip->ip_len */ 416 u_int16_t fp_mss; /* TCP MSS */ 417 u_int16_t fp_flags; 418 u_int8_t fp_optcnt; /* TCP option count */ 419 u_int8_t fp_wscale; /* TCP window scaling */ 420 u_int8_t fp_ttl; /* IPv4 TTL */ 421 422 int fp_getnum; /* DIOCOSFPGET number */ 423 }; 424 425 #define PF_ANCHOR_NAME_SIZE 64 426 427 struct pf_rule { 428 struct pf_rule_addr src; 429 struct pf_rule_addr dst; 430 #define PF_SKIP_IFP 0 431 #define PF_SKIP_DIR 1 432 #define PF_SKIP_AF 2 433 #define PF_SKIP_PROTO 3 434 #define PF_SKIP_SRC_ADDR 4 435 #define PF_SKIP_SRC_PORT 5 436 #define PF_SKIP_DST_ADDR 6 437 #define PF_SKIP_DST_PORT 7 438 #define PF_SKIP_COUNT 8 439 union pf_rule_ptr skip[PF_SKIP_COUNT]; 440 #define PF_RULE_LABEL_SIZE 64 441 char label[PF_RULE_LABEL_SIZE]; 442 char ifname[IFNAMSIZ]; 443 char qname[PF_QNAME_SIZE]; 444 char pqname[PF_QNAME_SIZE]; 445 #define PF_TAG_NAME_SIZE 64 446 char tagname[PF_TAG_NAME_SIZE]; 447 char match_tagname[PF_TAG_NAME_SIZE]; 448 449 char overload_tblname[PF_TABLE_NAME_SIZE]; 450 451 TAILQ_ENTRY(pf_rule) entries; 452 struct pf_pool rpool; 453 454 u_int64_t evaluations; 455 u_int64_t packets[2]; 456 u_int64_t bytes[2]; 457 458 struct pfi_kif *kif; 459 struct pf_anchor *anchor; 460 struct pfr_ktable *overload_tbl; 461 462 pf_osfp_t os_fingerprint; 463 464 int rtableid; 465 u_int32_t timeout[PFTM_MAX]; 466 u_int32_t max_states; 467 u_int32_t max_src_nodes; 468 u_int32_t max_src_states; 469 u_int32_t max_src_conn; 470 struct { 471 u_int32_t limit; 472 u_int32_t seconds; 473 } max_src_conn_rate; 474 u_int32_t qid; 475 u_int32_t pqid; 476 u_int32_t rt_listid; 477 u_int32_t nr; 478 u_int32_t prob; 479 uid_t cuid; 480 pid_t cpid; 481 482 counter_u64_t states_cur; 483 counter_u64_t states_tot; 484 counter_u64_t src_nodes; 485 486 u_int16_t return_icmp; 487 u_int16_t return_icmp6; 488 u_int16_t max_mss; 489 u_int16_t tag; 490 u_int16_t match_tag; 491 u_int16_t scrub_flags; 492 493 struct pf_rule_uid uid; 494 struct pf_rule_gid gid; 495 496 u_int32_t rule_flag; 497 u_int8_t action; 498 u_int8_t direction; 499 u_int8_t log; 500 u_int8_t logif; 501 u_int8_t quick; 502 u_int8_t ifnot; 503 u_int8_t match_tag_not; 504 u_int8_t natpass; 505 506 #define PF_STATE_NORMAL 0x1 507 #define PF_STATE_MODULATE 0x2 508 #define PF_STATE_SYNPROXY 0x3 509 u_int8_t keep_state; 510 sa_family_t af; 511 u_int8_t proto; 512 u_int8_t type; 513 u_int8_t code; 514 u_int8_t flags; 515 u_int8_t flagset; 516 u_int8_t min_ttl; 517 u_int8_t allow_opts; 518 u_int8_t rt; 519 u_int8_t return_ttl; 520 u_int8_t tos; 521 u_int8_t set_tos; 522 u_int8_t anchor_relative; 523 u_int8_t anchor_wildcard; 524 525 #define PF_FLUSH 0x01 526 #define PF_FLUSH_GLOBAL 0x02 527 u_int8_t flush; 528 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 529 #define PF_PRIO_MAX 7 530 u_int8_t prio; 531 u_int8_t set_prio[2]; 532 533 struct { 534 struct pf_addr addr; 535 u_int16_t port; 536 } divert; 537 538 uint64_t u_states_cur; 539 uint64_t u_states_tot; 540 uint64_t u_src_nodes; 541 }; 542 543 /* rule flags */ 544 #define PFRULE_DROP 0x0000 545 #define PFRULE_RETURNRST 0x0001 546 #define PFRULE_FRAGMENT 0x0002 547 #define PFRULE_RETURNICMP 0x0004 548 #define PFRULE_RETURN 0x0008 549 #define PFRULE_NOSYNC 0x0010 550 #define PFRULE_SRCTRACK 0x0020 /* track source states */ 551 #define PFRULE_RULESRCTRACK 0x0040 /* per rule */ 552 #define PFRULE_REFS 0x0080 /* rule has references */ 553 554 /* scrub flags */ 555 #define PFRULE_NODF 0x0100 556 #define PFRULE_RANDOMID 0x0800 557 #define PFRULE_REASSEMBLE_TCP 0x1000 558 #define PFRULE_SET_TOS 0x2000 559 560 /* rule flags again */ 561 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 562 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 563 564 #define PFSTATE_HIWAT 100000 /* default state table size */ 565 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 566 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 567 568 569 struct pf_threshold { 570 u_int32_t limit; 571 #define PF_THRESHOLD_MULT 1000 572 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 573 u_int32_t seconds; 574 u_int32_t count; 575 u_int32_t last; 576 }; 577 578 struct pf_src_node { 579 LIST_ENTRY(pf_src_node) entry; 580 struct pf_addr addr; 581 struct pf_addr raddr; 582 union pf_rule_ptr rule; 583 struct pfi_kif *kif; 584 u_int64_t bytes[2]; 585 u_int64_t packets[2]; 586 u_int32_t states; 587 u_int32_t conn; 588 struct pf_threshold conn_rate; 589 u_int32_t creation; 590 u_int32_t expire; 591 sa_family_t af; 592 u_int8_t ruletype; 593 }; 594 595 #define PFSNODE_HIWAT 10000 /* default source node table size */ 596 597 TAILQ_HEAD(pf_rulequeue, pf_rule); 598 599 struct pf_anchor; 600 601 struct pf_ruleset { 602 struct { 603 struct pf_rulequeue queues[2]; 604 struct { 605 struct pf_rulequeue *ptr; 606 struct pf_rule **ptr_array; 607 u_int32_t rcount; 608 u_int32_t ticket; 609 int open; 610 } active, inactive; 611 } rules[PF_RULESET_MAX]; 612 struct pf_anchor *anchor; 613 u_int32_t tticket; 614 int tables; 615 int topen; 616 }; 617 618 RB_HEAD(pf_anchor_global, pf_anchor); 619 RB_HEAD(pf_anchor_node, pf_anchor); 620 struct pf_anchor { 621 RB_ENTRY(pf_anchor) entry_global; 622 RB_ENTRY(pf_anchor) entry_node; 623 struct pf_anchor *parent; 624 struct pf_anchor_node children; 625 char name[PF_ANCHOR_NAME_SIZE]; 626 char path[MAXPATHLEN]; 627 struct pf_ruleset ruleset; 628 int refcnt; /* anchor rules */ 629 int match; /* XXX: used for pfctl black magic */ 630 }; 631 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 632 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 633 634 /* these ruleset functions can be linked into userland programs (pfctl) */ 635 int pf_get_ruleset_number(u_int8_t); 636 void pf_init_ruleset(struct pf_ruleset *); 637 int pf_anchor_setup(struct pf_rule *, 638 const struct pf_ruleset *, const char *); 639 void pf_remove_if_empty_ruleset(struct pf_ruleset *); 640 struct pf_ruleset *pf_find_ruleset(const char *); 641 struct pf_ruleset *pf_find_or_create_ruleset(const char *); 642 643 #endif /* _NET_PF_H_ */ 644