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 PF_MATCH }; 54 enum { PF_RULESET_SCRUB, PF_RULESET_FILTER, PF_RULESET_NAT, 55 PF_RULESET_BINAT, PF_RULESET_RDR, PF_RULESET_MAX }; 56 enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT, 57 PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG }; 58 enum { PF_DEBUG_NONE, PF_DEBUG_URGENT, PF_DEBUG_MISC, PF_DEBUG_NOISY }; 59 enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL, 60 PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER, 61 PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET }; 62 enum { PF_GET_NONE, PF_GET_CLR_CNTR }; 63 enum { PF_SK_WIRE, PF_SK_STACK, PF_SK_BOTH }; 64 enum { PF_PEER_SRC, PF_PEER_DST, PF_PEER_BOTH }; 65 66 /* 67 * Note about PFTM_*: real indices into pf_rule.timeout[] come before 68 * PFTM_MAX, special cases afterwards. See pf_state_expires(). 69 */ 70 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED, 71 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED, 72 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE, 73 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY, 74 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE, 75 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL, 76 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE, 77 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED }; 78 79 /* PFTM default values */ 80 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 81 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 82 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 83 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 84 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 85 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 86 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 87 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 88 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 89 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 90 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 91 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 92 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 93 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 94 #define PFTM_FRAG_VAL 30 /* Fragment expire */ 95 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 96 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 97 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 98 99 enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 100 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 101 PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX }; 102 #define PF_POOL_IDMASK 0x0f 103 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 104 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN }; 105 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 106 PF_ADDR_TABLE, PF_ADDR_URPFFAILED, 107 PF_ADDR_RANGE }; 108 #define PF_POOL_TYPEMASK 0x0f 109 #define PF_POOL_STICKYADDR 0x20 110 #define PF_WSCALE_FLAG 0x80 111 #define PF_WSCALE_MASK 0x0f 112 113 #define PF_LOG 0x01 114 #define PF_LOG_ALL 0x02 115 #define PF_LOG_SOCKET_LOOKUP 0x04 116 #define PF_LOG_FORCE 0x08 117 118 /* Reasons code for passing/dropping a packet */ 119 #define PFRES_MATCH 0 /* Explicit match of a rule */ 120 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 121 #define PFRES_FRAG 2 /* Dropping following fragment */ 122 #define PFRES_SHORT 3 /* Dropping short packet */ 123 #define PFRES_NORM 4 /* Dropping by normalizer */ 124 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 125 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 126 #define PFRES_CONGEST 7 /* Congestion (of ipintrq) */ 127 #define PFRES_IPOPTIONS 8 /* IP option */ 128 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 129 #define PFRES_BADSTATE 10 /* State mismatch */ 130 #define PFRES_STATEINS 11 /* State insertion failure */ 131 #define PFRES_MAXSTATES 12 /* State limit */ 132 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 133 #define PFRES_SYNPROXY 14 /* SYN proxy */ 134 #define PFRES_MAPFAILED 15 /* pf_map_addr() failed */ 135 #define PFRES_MAX 16 /* total+1 */ 136 137 #define PFRES_NAMES { \ 138 "match", \ 139 "bad-offset", \ 140 "fragment", \ 141 "short", \ 142 "normalize", \ 143 "memory", \ 144 "bad-timestamp", \ 145 "congestion", \ 146 "ip-option", \ 147 "proto-cksum", \ 148 "state-mismatch", \ 149 "state-insert", \ 150 "state-limit", \ 151 "src-limit", \ 152 "synproxy", \ 153 "map-failed", \ 154 NULL \ 155 } 156 157 /* Counters for other things we want to keep track of */ 158 #define LCNT_STATES 0 /* states */ 159 #define LCNT_SRCSTATES 1 /* max-src-states */ 160 #define LCNT_SRCNODES 2 /* max-src-nodes */ 161 #define LCNT_SRCCONN 3 /* max-src-conn */ 162 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 163 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 164 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 165 #define LCNT_MAX 7 /* total+1 */ 166 /* Only available via the nvlist-based API */ 167 #define KLCNT_SYNFLOODS 7 /* synfloods detected */ 168 #define KLCNT_SYNCOOKIES_SENT 8 /* syncookies sent */ 169 #define KLCNT_SYNCOOKIES_VALID 9 /* syncookies validated */ 170 #define KLCNT_MAX 10 /* total+1 */ 171 172 #define LCNT_NAMES { \ 173 "max states per rule", \ 174 "max-src-states", \ 175 "max-src-nodes", \ 176 "max-src-conn", \ 177 "max-src-conn-rate", \ 178 "overload table insertion", \ 179 "overload flush states", \ 180 NULL \ 181 } 182 #define KLCNT_NAMES { \ 183 "max states per rule", \ 184 "max-src-states", \ 185 "max-src-nodes", \ 186 "max-src-conn", \ 187 "max-src-conn-rate", \ 188 "overload table insertion", \ 189 "overload flush states", \ 190 "synfloods detected", \ 191 "syncookies sent", \ 192 "syncookies validated", \ 193 NULL \ 194 } 195 196 /* state operation counters */ 197 #define FCNT_STATE_SEARCH 0 198 #define FCNT_STATE_INSERT 1 199 #define FCNT_STATE_REMOVALS 2 200 #define FCNT_MAX 3 201 202 #ifdef _KERNEL 203 #define FCNT_NAMES { \ 204 "searches", \ 205 "inserts", \ 206 "removals", \ 207 NULL \ 208 } 209 #endif 210 211 /* src_node operation counters */ 212 #define SCNT_SRC_NODE_SEARCH 0 213 #define SCNT_SRC_NODE_INSERT 1 214 #define SCNT_SRC_NODE_REMOVALS 2 215 #define SCNT_MAX 3 216 217 #define PF_TABLE_NAME_SIZE 32 218 #define PF_QNAME_SIZE 64 219 220 struct pfioc_nv { 221 void *data; 222 size_t len; /* The length of the nvlist data. */ 223 size_t size; /* The total size of the data buffer. */ 224 }; 225 226 struct pf_rule; 227 228 /* keep synced with pfi_kif, used in RB_FIND */ 229 struct pfi_kif_cmp { 230 char pfik_name[IFNAMSIZ]; 231 }; 232 233 struct pfi_kif { 234 char pfik_name[IFNAMSIZ]; 235 union { 236 RB_ENTRY(pfi_kif) _pfik_tree; 237 LIST_ENTRY(pfi_kif) _pfik_list; 238 } _pfik_glue; 239 #define pfik_tree _pfik_glue._pfik_tree 240 #define pfik_list _pfik_glue._pfik_list 241 u_int64_t pfik_packets[2][2][2]; 242 u_int64_t pfik_bytes[2][2][2]; 243 u_int32_t pfik_tzero; 244 u_int pfik_flags; 245 struct ifnet *pfik_ifp; 246 struct ifg_group *pfik_group; 247 u_int pfik_rulerefs; 248 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 249 }; 250 251 struct pf_status { 252 uint64_t counters[PFRES_MAX]; 253 uint64_t lcounters[LCNT_MAX]; 254 uint64_t fcounters[FCNT_MAX]; 255 uint64_t scounters[SCNT_MAX]; 256 uint64_t pcounters[2][2][3]; 257 uint64_t bcounters[2][2]; 258 uint32_t running; 259 uint32_t states; 260 uint32_t src_nodes; 261 uint32_t since; 262 uint32_t debug; 263 uint32_t hostid; 264 char ifname[IFNAMSIZ]; 265 uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 266 }; 267 268 #define PF_REASS_ENABLED 0x01 269 #define PF_REASS_NODF 0x02 270 271 struct pf_addr { 272 union { 273 struct in_addr v4; 274 struct in6_addr v6; 275 u_int8_t addr8[16]; 276 u_int16_t addr16[8]; 277 u_int32_t addr32[4]; 278 } pfa; /* 128-bit address */ 279 #define v4 pfa.v4 280 #define v6 pfa.v6 281 #define addr8 pfa.addr8 282 #define addr16 pfa.addr16 283 #define addr32 pfa.addr32 284 }; 285 286 #define PFI_AFLAG_NETWORK 0x01 287 #define PFI_AFLAG_BROADCAST 0x02 288 #define PFI_AFLAG_PEER 0x04 289 #define PFI_AFLAG_MODEMASK 0x07 290 #define PFI_AFLAG_NOALIAS 0x08 291 292 struct pf_addr_wrap { 293 union { 294 struct { 295 struct pf_addr addr; 296 struct pf_addr mask; 297 } a; 298 char ifname[IFNAMSIZ]; 299 char tblname[PF_TABLE_NAME_SIZE]; 300 } v; 301 union { 302 struct pfi_dynaddr *dyn; 303 struct pfr_ktable *tbl; 304 int dyncnt; 305 int tblcnt; 306 } p; 307 u_int8_t type; /* PF_ADDR_* */ 308 u_int8_t iflags; /* PFI_AFLAG_* */ 309 }; 310 311 union pf_rule_ptr { 312 struct pf_rule *ptr; 313 u_int32_t nr; 314 }; 315 316 struct pf_rule_uid { 317 uid_t uid[2]; 318 u_int8_t op; 319 }; 320 321 struct pf_rule_gid { 322 uid_t gid[2]; 323 u_int8_t op; 324 }; 325 326 struct pf_rule_addr { 327 struct pf_addr_wrap addr; 328 u_int16_t port[2]; 329 u_int8_t neg; 330 u_int8_t port_op; 331 }; 332 333 struct pf_pooladdr { 334 struct pf_addr_wrap addr; 335 TAILQ_ENTRY(pf_pooladdr) entries; 336 char ifname[IFNAMSIZ]; 337 struct pfi_kif *kif; 338 }; 339 340 TAILQ_HEAD(pf_palist, pf_pooladdr); 341 342 struct pf_poolhashkey { 343 union { 344 u_int8_t key8[16]; 345 u_int16_t key16[8]; 346 u_int32_t key32[4]; 347 } pfk; /* 128-bit hash key */ 348 #define key8 pfk.key8 349 #define key16 pfk.key16 350 #define key32 pfk.key32 351 }; 352 353 struct pf_mape_portset { 354 u_int8_t offset; 355 u_int8_t psidlen; 356 u_int16_t psid; 357 }; 358 359 struct pf_pool { 360 struct pf_palist list; 361 struct pf_pooladdr *cur; 362 struct pf_poolhashkey key; 363 struct pf_addr counter; 364 int tblidx; 365 u_int16_t proxy_port[2]; 366 u_int8_t opts; 367 }; 368 369 /* A packed Operating System description for fingerprinting */ 370 typedef u_int32_t pf_osfp_t; 371 #define PF_OSFP_ANY ((pf_osfp_t)0) 372 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 373 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 374 375 struct pf_osfp_entry { 376 SLIST_ENTRY(pf_osfp_entry) fp_entry; 377 pf_osfp_t fp_os; 378 int fp_enflags; 379 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 380 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 381 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 382 #define PF_OSFP_LEN 32 383 char fp_class_nm[PF_OSFP_LEN]; 384 char fp_version_nm[PF_OSFP_LEN]; 385 char fp_subtype_nm[PF_OSFP_LEN]; 386 }; 387 #define PF_OSFP_ENTRY_EQ(a, b) \ 388 ((a)->fp_os == (b)->fp_os && \ 389 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 390 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 391 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 392 393 /* handle pf_osfp_t packing */ 394 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 395 #define _FP_UNUSED_BITS 1 396 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 397 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 398 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 399 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 400 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 401 ((1 << _FP_CLASS_BITS) - 1); \ 402 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 403 ((1 << _FP_VERSION_BITS) - 1);\ 404 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 405 } while(0) 406 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 407 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 408 + _FP_SUBTYPE_BITS); \ 409 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 410 _FP_SUBTYPE_BITS; \ 411 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 412 } while(0) 413 414 /* the fingerprint of an OSes TCP SYN packet */ 415 typedef u_int64_t pf_tcpopts_t; 416 struct pf_os_fingerprint { 417 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 418 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 419 u_int16_t fp_wsize; /* TCP window size */ 420 u_int16_t fp_psize; /* ip->ip_len */ 421 u_int16_t fp_mss; /* TCP MSS */ 422 u_int16_t fp_flags; 423 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 424 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 425 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 426 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 427 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 428 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 429 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 430 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 431 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 432 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 433 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 434 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 435 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 436 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 437 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 438 u_int8_t fp_optcnt; /* TCP option count */ 439 u_int8_t fp_wscale; /* TCP window scaling */ 440 u_int8_t fp_ttl; /* IPv4 TTL */ 441 #define PF_OSFP_MAXTTL_OFFSET 40 442 /* TCP options packing */ 443 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 444 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 445 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 446 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 447 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 448 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 449 #define PF_OSFP_MAX_OPTS \ 450 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 451 / PF_OSFP_TCPOPT_BITS 452 453 SLIST_ENTRY(pf_os_fingerprint) fp_next; 454 }; 455 456 struct pf_osfp_ioctl { 457 struct pf_osfp_entry fp_os; 458 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 459 u_int16_t fp_wsize; /* TCP window size */ 460 u_int16_t fp_psize; /* ip->ip_len */ 461 u_int16_t fp_mss; /* TCP MSS */ 462 u_int16_t fp_flags; 463 u_int8_t fp_optcnt; /* TCP option count */ 464 u_int8_t fp_wscale; /* TCP window scaling */ 465 u_int8_t fp_ttl; /* IPv4 TTL */ 466 467 int fp_getnum; /* DIOCOSFPGET number */ 468 }; 469 470 #define PF_ANCHOR_NAME_SIZE 64 471 472 struct pf_rule { 473 struct pf_rule_addr src; 474 struct pf_rule_addr dst; 475 #define PF_SKIP_IFP 0 476 #define PF_SKIP_DIR 1 477 #define PF_SKIP_AF 2 478 #define PF_SKIP_PROTO 3 479 #define PF_SKIP_SRC_ADDR 4 480 #define PF_SKIP_SRC_PORT 5 481 #define PF_SKIP_DST_ADDR 6 482 #define PF_SKIP_DST_PORT 7 483 #define PF_SKIP_COUNT 8 484 union pf_rule_ptr skip[PF_SKIP_COUNT]; 485 #define PF_RULE_LABEL_SIZE 64 486 #define PF_RULE_MAX_LABEL_COUNT 5 487 char label[PF_RULE_LABEL_SIZE]; 488 char ifname[IFNAMSIZ]; 489 char qname[PF_QNAME_SIZE]; 490 char pqname[PF_QNAME_SIZE]; 491 #define PF_TAG_NAME_SIZE 64 492 char tagname[PF_TAG_NAME_SIZE]; 493 char match_tagname[PF_TAG_NAME_SIZE]; 494 495 char overload_tblname[PF_TABLE_NAME_SIZE]; 496 497 TAILQ_ENTRY(pf_rule) entries; 498 struct pf_pool rpool; 499 500 u_int64_t evaluations; 501 u_int64_t packets[2]; 502 u_int64_t bytes[2]; 503 504 struct pfi_kif *kif; 505 struct pf_anchor *anchor; 506 struct pfr_ktable *overload_tbl; 507 508 pf_osfp_t os_fingerprint; 509 510 int rtableid; 511 u_int32_t timeout[PFTM_MAX]; 512 u_int32_t max_states; 513 u_int32_t max_src_nodes; 514 u_int32_t max_src_states; 515 u_int32_t max_src_conn; 516 struct { 517 u_int32_t limit; 518 u_int32_t seconds; 519 } max_src_conn_rate; 520 u_int32_t qid; 521 u_int32_t pqid; 522 u_int32_t rt_listid; 523 u_int32_t nr; 524 u_int32_t prob; 525 uid_t cuid; 526 pid_t cpid; 527 528 counter_u64_t states_cur; 529 counter_u64_t states_tot; 530 counter_u64_t src_nodes; 531 532 u_int16_t return_icmp; 533 u_int16_t return_icmp6; 534 u_int16_t max_mss; 535 u_int16_t tag; 536 u_int16_t match_tag; 537 u_int16_t scrub_flags; 538 539 struct pf_rule_uid uid; 540 struct pf_rule_gid gid; 541 542 u_int32_t rule_flag; 543 u_int8_t action; 544 u_int8_t direction; 545 u_int8_t log; 546 u_int8_t logif; 547 u_int8_t quick; 548 u_int8_t ifnot; 549 u_int8_t match_tag_not; 550 u_int8_t natpass; 551 552 #define PF_STATE_NORMAL 0x1 553 #define PF_STATE_MODULATE 0x2 554 #define PF_STATE_SYNPROXY 0x3 555 u_int8_t keep_state; 556 sa_family_t af; 557 u_int8_t proto; 558 u_int8_t type; 559 u_int8_t code; 560 u_int8_t flags; 561 u_int8_t flagset; 562 u_int8_t min_ttl; 563 u_int8_t allow_opts; 564 u_int8_t rt; 565 u_int8_t return_ttl; 566 u_int8_t tos; 567 u_int8_t set_tos; 568 u_int8_t anchor_relative; 569 u_int8_t anchor_wildcard; 570 571 #define PF_FLUSH 0x01 572 #define PF_FLUSH_GLOBAL 0x02 573 u_int8_t flush; 574 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 575 #define PF_PRIO_MAX 7 576 u_int8_t prio; 577 u_int8_t set_prio[2]; 578 579 struct { 580 struct pf_addr addr; 581 u_int16_t port; 582 } divert; 583 584 uint64_t u_states_cur; 585 uint64_t u_states_tot; 586 uint64_t u_src_nodes; 587 }; 588 589 /* pf_krule->rule_flag and old-style scrub flags */ 590 #define PFRULE_DROP 0x00000000 591 #define PFRULE_RETURNRST 0x00000001 592 #define PFRULE_FRAGMENT 0x00000002 593 #define PFRULE_RETURNICMP 0x00000004 594 #define PFRULE_RETURN 0x00000008 595 #define PFRULE_NOSYNC 0x00000010 596 #define PFRULE_SRCTRACK 0x00000020 /* track source states */ 597 #define PFRULE_RULESRCTRACK 0x00000040 /* per rule */ 598 #define PFRULE_NODF 0x00000100 599 #define PFRULE_FRAGMENT_NOREASS 0x00000200 600 #define PFRULE_RANDOMID 0x00000800 601 #define PFRULE_REASSEMBLE_TCP 0x00001000 602 #define PFRULE_SET_TOS 0x00002000 603 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 604 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 605 606 #ifdef _KERNEL 607 #define PFRULE_REFS 0x0080 /* rule has references */ 608 #endif 609 610 /* pf_rule_actions->dnflags */ 611 #define PFRULE_DN_IS_PIPE 0x0040 612 #define PFRULE_DN_IS_QUEUE 0x0080 613 614 /* pf_state->state_flags, pf_rule_actions->flags, pf_krule->scrub_flags */ 615 #define PFSTATE_ALLOWOPTS 0x0001 616 #define PFSTATE_SLOPPY 0x0002 617 /* was PFSTATE_PFLOW 0x0004 */ 618 #define PFSTATE_NOSYNC 0x0008 619 #define PFSTATE_ACK 0x0010 620 #define PFSTATE_NODF 0x0020 621 #define PFSTATE_SETTOS 0x0040 622 #define PFSTATE_RANDOMID 0x0080 623 #define PFSTATE_SCRUB_TCP 0x0100 624 #define PFSTATE_SETPRIO 0x0200 625 /* was PFSTATE_INP_UNLINKED 0x0400 */ 626 /* FreeBSD-specific flags are added from the end to keep space for porting 627 * flags from OpenBSD */ 628 #define PFSTATE_DN_IS_PIPE 0x4000 629 #define PFSTATE_DN_IS_QUEUE 0x8000 630 #define PFSTATE_SCRUBMASK (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SCRUB_TCP) 631 #define PFSTATE_SETMASK (PFSTATE_SETTOS|PFSTATE_SETPRIO) 632 633 #define PFSTATE_HIWAT 100000 /* default state table size */ 634 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 635 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 636 637 638 struct pf_threshold { 639 u_int32_t limit; 640 #define PF_THRESHOLD_MULT 1000 641 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 642 u_int32_t seconds; 643 u_int32_t count; 644 u_int32_t last; 645 }; 646 647 struct pf_src_node { 648 LIST_ENTRY(pf_src_node) entry; 649 struct pf_addr addr; 650 struct pf_addr raddr; 651 union pf_rule_ptr rule; 652 struct pfi_kif *kif; 653 u_int64_t bytes[2]; 654 u_int64_t packets[2]; 655 u_int32_t states; 656 u_int32_t conn; 657 struct pf_threshold conn_rate; 658 u_int32_t creation; 659 u_int32_t expire; 660 sa_family_t af; 661 u_int8_t ruletype; 662 }; 663 664 #define PFSNODE_HIWAT 10000 /* default source node table size */ 665 666 TAILQ_HEAD(pf_rulequeue, pf_rule); 667 668 struct pf_anchor; 669 670 struct pf_ruleset { 671 struct { 672 struct pf_rulequeue queues[2]; 673 struct { 674 struct pf_rulequeue *ptr; 675 struct pf_rule **ptr_array; 676 u_int32_t rcount; 677 u_int32_t ticket; 678 int open; 679 } active, inactive; 680 } rules[PF_RULESET_MAX]; 681 struct pf_anchor *anchor; 682 u_int32_t tticket; 683 int tables; 684 int topen; 685 }; 686 687 RB_HEAD(pf_anchor_global, pf_anchor); 688 RB_HEAD(pf_anchor_node, pf_anchor); 689 struct pf_anchor { 690 RB_ENTRY(pf_anchor) entry_global; 691 RB_ENTRY(pf_anchor) entry_node; 692 struct pf_anchor *parent; 693 struct pf_anchor_node children; 694 char name[PF_ANCHOR_NAME_SIZE]; 695 char path[MAXPATHLEN]; 696 struct pf_ruleset ruleset; 697 int refcnt; /* anchor rules */ 698 int match; /* XXX: used for pfctl black magic */ 699 }; 700 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 701 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 702 703 int pf_get_ruleset_number(u_int8_t); 704 705 #endif /* _NET_PF_H_ */ 706