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 }; 239 u_int64_t pfik_packets[2][2][2]; 240 u_int64_t pfik_bytes[2][2][2]; 241 u_int32_t pfik_tzero; 242 u_int pfik_flags; 243 struct ifnet *pfik_ifp; 244 struct ifg_group *pfik_group; 245 u_int pfik_rulerefs; 246 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 247 }; 248 249 struct pf_status { 250 uint64_t counters[PFRES_MAX]; 251 uint64_t lcounters[LCNT_MAX]; 252 uint64_t fcounters[FCNT_MAX]; 253 uint64_t scounters[SCNT_MAX]; 254 uint64_t pcounters[2][2][3]; 255 uint64_t bcounters[2][2]; 256 uint32_t running; 257 uint32_t states; 258 uint32_t src_nodes; 259 uint32_t since; 260 uint32_t debug; 261 uint32_t hostid; 262 char ifname[IFNAMSIZ]; 263 uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 264 }; 265 266 #define PF_REASS_ENABLED 0x01 267 #define PF_REASS_NODF 0x02 268 269 struct pf_addr { 270 union { 271 struct in_addr v4; 272 struct in6_addr v6; 273 u_int8_t addr8[16]; 274 u_int16_t addr16[8]; 275 u_int32_t addr32[4]; 276 }; /* 128-bit address */ 277 }; 278 279 #define PFI_AFLAG_NETWORK 0x01 280 #define PFI_AFLAG_BROADCAST 0x02 281 #define PFI_AFLAG_PEER 0x04 282 #define PFI_AFLAG_MODEMASK 0x07 283 #define PFI_AFLAG_NOALIAS 0x08 284 285 struct pf_addr_wrap { 286 union { 287 struct { 288 struct pf_addr addr; 289 struct pf_addr mask; 290 } a; 291 char ifname[IFNAMSIZ]; 292 char tblname[PF_TABLE_NAME_SIZE]; 293 } v; 294 union { 295 struct pfi_dynaddr *dyn; 296 struct pfr_ktable *tbl; 297 int dyncnt; 298 int tblcnt; 299 } p; 300 u_int8_t type; /* PF_ADDR_* */ 301 u_int8_t iflags; /* PFI_AFLAG_* */ 302 }; 303 304 union pf_rule_ptr { 305 struct pf_rule *ptr; 306 u_int32_t nr; 307 }; 308 309 struct pf_rule_uid { 310 uid_t uid[2]; 311 u_int8_t op; 312 }; 313 314 struct pf_rule_gid { 315 uid_t gid[2]; 316 u_int8_t op; 317 }; 318 319 struct pf_rule_addr { 320 struct pf_addr_wrap addr; 321 u_int16_t port[2]; 322 u_int8_t neg; 323 u_int8_t port_op; 324 }; 325 326 struct pf_pooladdr { 327 struct pf_addr_wrap addr; 328 TAILQ_ENTRY(pf_pooladdr) entries; 329 char ifname[IFNAMSIZ]; 330 struct pfi_kif *kif; 331 }; 332 333 TAILQ_HEAD(pf_palist, pf_pooladdr); 334 335 struct pf_poolhashkey { 336 union { 337 u_int8_t key8[16]; 338 u_int16_t key16[8]; 339 u_int32_t key32[4]; 340 }; /* 128-bit hash key */ 341 }; 342 343 struct pf_mape_portset { 344 u_int8_t offset; 345 u_int8_t psidlen; 346 u_int16_t psid; 347 }; 348 349 struct pf_pool { 350 struct pf_palist list; 351 struct pf_pooladdr *cur; 352 struct pf_poolhashkey key; 353 struct pf_addr counter; 354 int tblidx; 355 u_int16_t proxy_port[2]; 356 u_int8_t opts; 357 }; 358 359 /* A packed Operating System description for fingerprinting */ 360 typedef u_int32_t pf_osfp_t; 361 #define PF_OSFP_ANY ((pf_osfp_t)0) 362 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 363 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 364 365 struct pf_osfp_entry { 366 SLIST_ENTRY(pf_osfp_entry) fp_entry; 367 pf_osfp_t fp_os; 368 int fp_enflags; 369 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 370 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 371 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 372 #define PF_OSFP_LEN 32 373 char fp_class_nm[PF_OSFP_LEN]; 374 char fp_version_nm[PF_OSFP_LEN]; 375 char fp_subtype_nm[PF_OSFP_LEN]; 376 }; 377 #define PF_OSFP_ENTRY_EQ(a, b) \ 378 ((a)->fp_os == (b)->fp_os && \ 379 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 380 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 381 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 382 383 /* handle pf_osfp_t packing */ 384 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 385 #define _FP_UNUSED_BITS 1 386 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 387 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 388 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 389 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 390 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 391 ((1 << _FP_CLASS_BITS) - 1); \ 392 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 393 ((1 << _FP_VERSION_BITS) - 1);\ 394 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 395 } while(0) 396 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 397 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 398 + _FP_SUBTYPE_BITS); \ 399 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 400 _FP_SUBTYPE_BITS; \ 401 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 402 } while(0) 403 404 /* the fingerprint of an OSes TCP SYN packet */ 405 typedef u_int64_t pf_tcpopts_t; 406 struct pf_os_fingerprint { 407 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 408 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 409 u_int16_t fp_wsize; /* TCP window size */ 410 u_int16_t fp_psize; /* ip->ip_len */ 411 u_int16_t fp_mss; /* TCP MSS */ 412 u_int16_t fp_flags; 413 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 414 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 415 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 416 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 417 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 418 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 419 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 420 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 421 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 422 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 423 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 424 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 425 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 426 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 427 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 428 u_int8_t fp_optcnt; /* TCP option count */ 429 u_int8_t fp_wscale; /* TCP window scaling */ 430 u_int8_t fp_ttl; /* IPv4 TTL */ 431 #define PF_OSFP_MAXTTL_OFFSET 40 432 /* TCP options packing */ 433 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 434 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 435 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 436 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 437 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 438 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 439 #define PF_OSFP_MAX_OPTS \ 440 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 441 / PF_OSFP_TCPOPT_BITS 442 443 SLIST_ENTRY(pf_os_fingerprint) fp_next; 444 }; 445 446 struct pf_osfp_ioctl { 447 struct pf_osfp_entry fp_os; 448 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 449 u_int16_t fp_wsize; /* TCP window size */ 450 u_int16_t fp_psize; /* ip->ip_len */ 451 u_int16_t fp_mss; /* TCP MSS */ 452 u_int16_t fp_flags; 453 u_int8_t fp_optcnt; /* TCP option count */ 454 u_int8_t fp_wscale; /* TCP window scaling */ 455 u_int8_t fp_ttl; /* IPv4 TTL */ 456 457 int fp_getnum; /* DIOCOSFPGET number */ 458 }; 459 460 #define PF_ANCHOR_NAME_SIZE 64 461 462 struct pf_rule { 463 struct pf_rule_addr src; 464 struct pf_rule_addr dst; 465 #define PF_SKIP_IFP 0 466 #define PF_SKIP_DIR 1 467 #define PF_SKIP_AF 2 468 #define PF_SKIP_PROTO 3 469 #define PF_SKIP_SRC_ADDR 4 470 #define PF_SKIP_SRC_PORT 5 471 #define PF_SKIP_DST_ADDR 6 472 #define PF_SKIP_DST_PORT 7 473 #define PF_SKIP_COUNT 8 474 union pf_rule_ptr skip[PF_SKIP_COUNT]; 475 #define PF_RULE_LABEL_SIZE 64 476 #define PF_RULE_MAX_LABEL_COUNT 5 477 char label[PF_RULE_LABEL_SIZE]; 478 char ifname[IFNAMSIZ]; 479 char qname[PF_QNAME_SIZE]; 480 char pqname[PF_QNAME_SIZE]; 481 #define PF_TAG_NAME_SIZE 64 482 char tagname[PF_TAG_NAME_SIZE]; 483 char match_tagname[PF_TAG_NAME_SIZE]; 484 485 char overload_tblname[PF_TABLE_NAME_SIZE]; 486 487 TAILQ_ENTRY(pf_rule) entries; 488 struct pf_pool rpool; 489 490 u_int64_t evaluations; 491 u_int64_t packets[2]; 492 u_int64_t bytes[2]; 493 494 struct pfi_kif *kif; 495 struct pf_anchor *anchor; 496 struct pfr_ktable *overload_tbl; 497 498 pf_osfp_t os_fingerprint; 499 500 int rtableid; 501 u_int32_t timeout[PFTM_MAX]; 502 u_int32_t max_states; 503 u_int32_t max_src_nodes; 504 u_int32_t max_src_states; 505 u_int32_t max_src_conn; 506 struct { 507 u_int32_t limit; 508 u_int32_t seconds; 509 } max_src_conn_rate; 510 u_int32_t qid; 511 u_int32_t pqid; 512 u_int32_t rt_listid; 513 u_int32_t nr; 514 u_int32_t prob; 515 uid_t cuid; 516 pid_t cpid; 517 518 counter_u64_t states_cur; 519 counter_u64_t states_tot; 520 counter_u64_t src_nodes; 521 522 u_int16_t return_icmp; 523 u_int16_t return_icmp6; 524 u_int16_t max_mss; 525 u_int16_t tag; 526 u_int16_t match_tag; 527 u_int16_t scrub_flags; 528 529 struct pf_rule_uid uid; 530 struct pf_rule_gid gid; 531 532 u_int32_t rule_flag; 533 u_int8_t action; 534 u_int8_t direction; 535 u_int8_t log; 536 u_int8_t logif; 537 u_int8_t quick; 538 u_int8_t ifnot; 539 u_int8_t match_tag_not; 540 u_int8_t natpass; 541 542 #define PF_STATE_NORMAL 0x1 543 #define PF_STATE_MODULATE 0x2 544 #define PF_STATE_SYNPROXY 0x3 545 u_int8_t keep_state; 546 sa_family_t af; 547 u_int8_t proto; 548 u_int8_t type; 549 u_int8_t code; 550 u_int8_t flags; 551 u_int8_t flagset; 552 u_int8_t min_ttl; 553 u_int8_t allow_opts; 554 u_int8_t rt; 555 u_int8_t return_ttl; 556 u_int8_t tos; 557 u_int8_t set_tos; 558 u_int8_t anchor_relative; 559 u_int8_t anchor_wildcard; 560 561 #define PF_FLUSH 0x01 562 #define PF_FLUSH_GLOBAL 0x02 563 u_int8_t flush; 564 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 565 #define PF_PRIO_MAX 7 566 u_int8_t prio; 567 u_int8_t set_prio[2]; 568 569 struct { 570 struct pf_addr addr; 571 u_int16_t port; 572 } divert; 573 574 uint64_t u_states_cur; 575 uint64_t u_states_tot; 576 uint64_t u_src_nodes; 577 }; 578 579 /* pf_krule->rule_flag and old-style scrub flags */ 580 #define PFRULE_DROP 0x00000000 581 #define PFRULE_RETURNRST 0x00000001 582 #define PFRULE_FRAGMENT 0x00000002 583 #define PFRULE_RETURNICMP 0x00000004 584 #define PFRULE_RETURN 0x00000008 585 #define PFRULE_NOSYNC 0x00000010 586 #define PFRULE_SRCTRACK 0x00000020 /* track source states */ 587 #define PFRULE_RULESRCTRACK 0x00000040 /* per rule */ 588 #define PFRULE_NODF 0x00000100 589 #define PFRULE_FRAGMENT_NOREASS 0x00000200 590 #define PFRULE_RANDOMID 0x00000800 591 #define PFRULE_REASSEMBLE_TCP 0x00001000 592 #define PFRULE_SET_TOS 0x00002000 593 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 594 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 595 596 #ifdef _KERNEL 597 #define PFRULE_REFS 0x0080 /* rule has references */ 598 #endif 599 600 /* pf_rule_actions->dnflags */ 601 #define PFRULE_DN_IS_PIPE 0x0040 602 #define PFRULE_DN_IS_QUEUE 0x0080 603 604 /* pf_state->state_flags, pf_rule_actions->flags, pf_krule->scrub_flags */ 605 #define PFSTATE_ALLOWOPTS 0x0001 606 #define PFSTATE_SLOPPY 0x0002 607 /* was PFSTATE_PFLOW 0x0004 */ 608 #define PFSTATE_NOSYNC 0x0008 609 #define PFSTATE_ACK 0x0010 610 #define PFSTATE_NODF 0x0020 611 #define PFSTATE_SETTOS 0x0040 612 #define PFSTATE_RANDOMID 0x0080 613 #define PFSTATE_SCRUB_TCP 0x0100 614 #define PFSTATE_SETPRIO 0x0200 615 /* was PFSTATE_INP_UNLINKED 0x0400 */ 616 /* FreeBSD-specific flags are added from the end to keep space for porting 617 * flags from OpenBSD */ 618 #define PFSTATE_DN_IS_PIPE 0x4000 619 #define PFSTATE_DN_IS_QUEUE 0x8000 620 #define PFSTATE_SCRUBMASK (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SCRUB_TCP) 621 #define PFSTATE_SETMASK (PFSTATE_SETTOS|PFSTATE_SETPRIO) 622 623 #define PFSTATE_HIWAT 100000 /* default state table size */ 624 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 625 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 626 627 628 struct pf_threshold { 629 u_int32_t limit; 630 #define PF_THRESHOLD_MULT 1000 631 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 632 u_int32_t seconds; 633 u_int32_t count; 634 u_int32_t last; 635 }; 636 637 struct pf_src_node { 638 LIST_ENTRY(pf_src_node) entry; 639 struct pf_addr addr; 640 struct pf_addr raddr; 641 union pf_rule_ptr rule; 642 struct pfi_kif *kif; 643 u_int64_t bytes[2]; 644 u_int64_t packets[2]; 645 u_int32_t states; 646 u_int32_t conn; 647 struct pf_threshold conn_rate; 648 u_int32_t creation; 649 u_int32_t expire; 650 sa_family_t af; 651 u_int8_t ruletype; 652 }; 653 654 #define PFSNODE_HIWAT 10000 /* default source node table size */ 655 656 TAILQ_HEAD(pf_rulequeue, pf_rule); 657 658 struct pf_anchor; 659 660 struct pf_ruleset { 661 struct { 662 struct pf_rulequeue queues[2]; 663 struct { 664 struct pf_rulequeue *ptr; 665 struct pf_rule **ptr_array; 666 u_int32_t rcount; 667 u_int32_t ticket; 668 int open; 669 } active, inactive; 670 } rules[PF_RULESET_MAX]; 671 struct pf_anchor *anchor; 672 u_int32_t tticket; 673 int tables; 674 int topen; 675 }; 676 677 RB_HEAD(pf_anchor_global, pf_anchor); 678 RB_HEAD(pf_anchor_node, pf_anchor); 679 struct pf_anchor { 680 RB_ENTRY(pf_anchor) entry_global; 681 RB_ENTRY(pf_anchor) entry_node; 682 struct pf_anchor *parent; 683 struct pf_anchor_node children; 684 char name[PF_ANCHOR_NAME_SIZE]; 685 char path[MAXPATHLEN]; 686 struct pf_ruleset ruleset; 687 int refcnt; /* anchor rules */ 688 int match; /* XXX: used for pfctl black magic */ 689 }; 690 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 691 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 692 693 int pf_get_ruleset_number(u_int8_t); 694 695 #endif /* _NET_PF_H_ */ 696