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 65 /* 66 * Note about PFTM_*: real indices into pf_rule.timeout[] come before 67 * PFTM_MAX, special cases afterwards. See pf_state_expires(). 68 */ 69 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED, 70 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED, 71 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE, 72 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY, 73 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE, 74 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL, 75 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE, 76 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED }; 77 78 /* PFTM default values */ 79 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 80 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 81 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 82 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 83 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 84 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 85 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 86 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 87 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 88 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 89 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 90 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 91 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 92 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 93 #define PFTM_FRAG_VAL 30 /* Fragment expire */ 94 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 95 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 96 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 97 98 enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 99 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 100 PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX }; 101 #define PF_POOL_IDMASK 0x0f 102 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 103 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN }; 104 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 105 PF_ADDR_TABLE, PF_ADDR_URPFFAILED, 106 PF_ADDR_RANGE }; 107 #define PF_POOL_TYPEMASK 0x0f 108 #define PF_POOL_STICKYADDR 0x20 109 #define PF_WSCALE_FLAG 0x80 110 #define PF_WSCALE_MASK 0x0f 111 112 #define PF_LOG 0x01 113 #define PF_LOG_ALL 0x02 114 #define PF_LOG_SOCKET_LOOKUP 0x04 115 116 /* Reasons code for passing/dropping a packet */ 117 #define PFRES_MATCH 0 /* Explicit match of a rule */ 118 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 119 #define PFRES_FRAG 2 /* Dropping following fragment */ 120 #define PFRES_SHORT 3 /* Dropping short packet */ 121 #define PFRES_NORM 4 /* Dropping by normalizer */ 122 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 123 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 124 #define PFRES_CONGEST 7 /* Congestion (of ipintrq) */ 125 #define PFRES_IPOPTIONS 8 /* IP option */ 126 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 127 #define PFRES_BADSTATE 10 /* State mismatch */ 128 #define PFRES_STATEINS 11 /* State insertion failure */ 129 #define PFRES_MAXSTATES 12 /* State limit */ 130 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 131 #define PFRES_SYNPROXY 14 /* SYN proxy */ 132 #define PFRES_MAPFAILED 15 /* pf_map_addr() failed */ 133 #define PFRES_MAX 16 /* total+1 */ 134 135 #define PFRES_NAMES { \ 136 "match", \ 137 "bad-offset", \ 138 "fragment", \ 139 "short", \ 140 "normalize", \ 141 "memory", \ 142 "bad-timestamp", \ 143 "congestion", \ 144 "ip-option", \ 145 "proto-cksum", \ 146 "state-mismatch", \ 147 "state-insert", \ 148 "state-limit", \ 149 "src-limit", \ 150 "synproxy", \ 151 "map-failed", \ 152 NULL \ 153 } 154 155 /* Counters for other things we want to keep track of */ 156 #define LCNT_STATES 0 /* states */ 157 #define LCNT_SRCSTATES 1 /* max-src-states */ 158 #define LCNT_SRCNODES 2 /* max-src-nodes */ 159 #define LCNT_SRCCONN 3 /* max-src-conn */ 160 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 161 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 162 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 163 #define LCNT_MAX 7 /* total+1 */ 164 165 #define LCNT_NAMES { \ 166 "max states per rule", \ 167 "max-src-states", \ 168 "max-src-nodes", \ 169 "max-src-conn", \ 170 "max-src-conn-rate", \ 171 "overload table insertion", \ 172 "overload flush states", \ 173 NULL \ 174 } 175 176 /* state operation counters */ 177 #define FCNT_STATE_SEARCH 0 178 #define FCNT_STATE_INSERT 1 179 #define FCNT_STATE_REMOVALS 2 180 #define FCNT_MAX 3 181 182 /* src_node operation counters */ 183 #define SCNT_SRC_NODE_SEARCH 0 184 #define SCNT_SRC_NODE_INSERT 1 185 #define SCNT_SRC_NODE_REMOVALS 2 186 #define SCNT_MAX 3 187 188 #define PF_TABLE_NAME_SIZE 32 189 #define PF_QNAME_SIZE 64 190 191 struct pfioc_nv { 192 void *data; 193 size_t len; /* The length of the nvlist data. */ 194 size_t size; /* The total size of the data buffer. */ 195 }; 196 197 struct pf_rule; 198 199 /* keep synced with pfi_kif, used in RB_FIND */ 200 struct pfi_kif_cmp { 201 char pfik_name[IFNAMSIZ]; 202 }; 203 204 struct pfi_kif { 205 char pfik_name[IFNAMSIZ]; 206 union { 207 RB_ENTRY(pfi_kif) _pfik_tree; 208 LIST_ENTRY(pfi_kif) _pfik_list; 209 } _pfik_glue; 210 #define pfik_tree _pfik_glue._pfik_tree 211 #define pfik_list _pfik_glue._pfik_list 212 u_int64_t pfik_packets[2][2][2]; 213 u_int64_t pfik_bytes[2][2][2]; 214 u_int32_t pfik_tzero; 215 u_int pfik_flags; 216 struct ifnet *pfik_ifp; 217 struct ifg_group *pfik_group; 218 u_int pfik_rulerefs; 219 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 220 }; 221 222 struct pf_status { 223 uint64_t counters[PFRES_MAX]; 224 uint64_t lcounters[LCNT_MAX]; 225 uint64_t fcounters[FCNT_MAX]; 226 uint64_t scounters[SCNT_MAX]; 227 uint64_t pcounters[2][2][3]; 228 uint64_t bcounters[2][2]; 229 uint32_t running; 230 uint32_t states; 231 uint32_t src_nodes; 232 uint32_t since; 233 uint32_t debug; 234 uint32_t hostid; 235 char ifname[IFNAMSIZ]; 236 uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 237 }; 238 239 struct pf_addr { 240 union { 241 struct in_addr v4; 242 struct in6_addr v6; 243 u_int8_t addr8[16]; 244 u_int16_t addr16[8]; 245 u_int32_t addr32[4]; 246 } pfa; /* 128-bit address */ 247 #define v4 pfa.v4 248 #define v6 pfa.v6 249 #define addr8 pfa.addr8 250 #define addr16 pfa.addr16 251 #define addr32 pfa.addr32 252 }; 253 254 #define PFI_AFLAG_NETWORK 0x01 255 #define PFI_AFLAG_BROADCAST 0x02 256 #define PFI_AFLAG_PEER 0x04 257 #define PFI_AFLAG_MODEMASK 0x07 258 #define PFI_AFLAG_NOALIAS 0x08 259 260 struct pf_addr_wrap { 261 union { 262 struct { 263 struct pf_addr addr; 264 struct pf_addr mask; 265 } a; 266 char ifname[IFNAMSIZ]; 267 char tblname[PF_TABLE_NAME_SIZE]; 268 } v; 269 union { 270 struct pfi_dynaddr *dyn; 271 struct pfr_ktable *tbl; 272 int dyncnt; 273 int tblcnt; 274 } p; 275 u_int8_t type; /* PF_ADDR_* */ 276 u_int8_t iflags; /* PFI_AFLAG_* */ 277 }; 278 279 union pf_rule_ptr { 280 struct pf_rule *ptr; 281 u_int32_t nr; 282 }; 283 284 struct pf_rule_uid { 285 uid_t uid[2]; 286 u_int8_t op; 287 }; 288 289 struct pf_rule_gid { 290 uid_t gid[2]; 291 u_int8_t op; 292 }; 293 294 struct pf_rule_addr { 295 struct pf_addr_wrap addr; 296 u_int16_t port[2]; 297 u_int8_t neg; 298 u_int8_t port_op; 299 }; 300 301 struct pf_pooladdr { 302 struct pf_addr_wrap addr; 303 TAILQ_ENTRY(pf_pooladdr) entries; 304 char ifname[IFNAMSIZ]; 305 struct pfi_kif *kif; 306 }; 307 308 TAILQ_HEAD(pf_palist, pf_pooladdr); 309 310 struct pf_poolhashkey { 311 union { 312 u_int8_t key8[16]; 313 u_int16_t key16[8]; 314 u_int32_t key32[4]; 315 } pfk; /* 128-bit hash key */ 316 #define key8 pfk.key8 317 #define key16 pfk.key16 318 #define key32 pfk.key32 319 }; 320 321 struct pf_mape_portset { 322 u_int8_t offset; 323 u_int8_t psidlen; 324 u_int16_t psid; 325 }; 326 327 struct pf_pool { 328 struct pf_palist list; 329 struct pf_pooladdr *cur; 330 struct pf_poolhashkey key; 331 struct pf_addr counter; 332 int tblidx; 333 u_int16_t proxy_port[2]; 334 u_int8_t opts; 335 }; 336 337 /* A packed Operating System description for fingerprinting */ 338 typedef u_int32_t pf_osfp_t; 339 #define PF_OSFP_ANY ((pf_osfp_t)0) 340 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 341 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 342 343 struct pf_osfp_entry { 344 SLIST_ENTRY(pf_osfp_entry) fp_entry; 345 pf_osfp_t fp_os; 346 int fp_enflags; 347 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 348 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 349 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 350 #define PF_OSFP_LEN 32 351 char fp_class_nm[PF_OSFP_LEN]; 352 char fp_version_nm[PF_OSFP_LEN]; 353 char fp_subtype_nm[PF_OSFP_LEN]; 354 }; 355 #define PF_OSFP_ENTRY_EQ(a, b) \ 356 ((a)->fp_os == (b)->fp_os && \ 357 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 358 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 359 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 360 361 /* handle pf_osfp_t packing */ 362 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 363 #define _FP_UNUSED_BITS 1 364 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 365 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 366 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 367 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 368 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 369 ((1 << _FP_CLASS_BITS) - 1); \ 370 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 371 ((1 << _FP_VERSION_BITS) - 1);\ 372 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 373 } while(0) 374 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 375 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 376 + _FP_SUBTYPE_BITS); \ 377 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 378 _FP_SUBTYPE_BITS; \ 379 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 380 } while(0) 381 382 /* the fingerprint of an OSes TCP SYN packet */ 383 typedef u_int64_t pf_tcpopts_t; 384 struct pf_os_fingerprint { 385 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 386 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 387 u_int16_t fp_wsize; /* TCP window size */ 388 u_int16_t fp_psize; /* ip->ip_len */ 389 u_int16_t fp_mss; /* TCP MSS */ 390 u_int16_t fp_flags; 391 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 392 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 393 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 394 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 395 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 396 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 397 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 398 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 399 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 400 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 401 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 402 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 403 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 404 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 405 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 406 u_int8_t fp_optcnt; /* TCP option count */ 407 u_int8_t fp_wscale; /* TCP window scaling */ 408 u_int8_t fp_ttl; /* IPv4 TTL */ 409 #define PF_OSFP_MAXTTL_OFFSET 40 410 /* TCP options packing */ 411 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 412 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 413 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 414 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 415 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 416 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 417 #define PF_OSFP_MAX_OPTS \ 418 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 419 / PF_OSFP_TCPOPT_BITS 420 421 SLIST_ENTRY(pf_os_fingerprint) fp_next; 422 }; 423 424 struct pf_osfp_ioctl { 425 struct pf_osfp_entry fp_os; 426 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 427 u_int16_t fp_wsize; /* TCP window size */ 428 u_int16_t fp_psize; /* ip->ip_len */ 429 u_int16_t fp_mss; /* TCP MSS */ 430 u_int16_t fp_flags; 431 u_int8_t fp_optcnt; /* TCP option count */ 432 u_int8_t fp_wscale; /* TCP window scaling */ 433 u_int8_t fp_ttl; /* IPv4 TTL */ 434 435 int fp_getnum; /* DIOCOSFPGET number */ 436 }; 437 438 #define PF_ANCHOR_NAME_SIZE 64 439 440 struct pf_rule { 441 struct pf_rule_addr src; 442 struct pf_rule_addr dst; 443 #define PF_SKIP_IFP 0 444 #define PF_SKIP_DIR 1 445 #define PF_SKIP_AF 2 446 #define PF_SKIP_PROTO 3 447 #define PF_SKIP_SRC_ADDR 4 448 #define PF_SKIP_SRC_PORT 5 449 #define PF_SKIP_DST_ADDR 6 450 #define PF_SKIP_DST_PORT 7 451 #define PF_SKIP_COUNT 8 452 union pf_rule_ptr skip[PF_SKIP_COUNT]; 453 #define PF_RULE_LABEL_SIZE 64 454 #define PF_RULE_MAX_LABEL_COUNT 5 455 char label[PF_RULE_LABEL_SIZE]; 456 char ifname[IFNAMSIZ]; 457 char qname[PF_QNAME_SIZE]; 458 char pqname[PF_QNAME_SIZE]; 459 #define PF_TAG_NAME_SIZE 64 460 char tagname[PF_TAG_NAME_SIZE]; 461 char match_tagname[PF_TAG_NAME_SIZE]; 462 463 char overload_tblname[PF_TABLE_NAME_SIZE]; 464 465 TAILQ_ENTRY(pf_rule) entries; 466 struct pf_pool rpool; 467 468 u_int64_t evaluations; 469 u_int64_t packets[2]; 470 u_int64_t bytes[2]; 471 472 struct pfi_kif *kif; 473 struct pf_anchor *anchor; 474 struct pfr_ktable *overload_tbl; 475 476 pf_osfp_t os_fingerprint; 477 478 int rtableid; 479 u_int32_t timeout[PFTM_MAX]; 480 u_int32_t max_states; 481 u_int32_t max_src_nodes; 482 u_int32_t max_src_states; 483 u_int32_t max_src_conn; 484 struct { 485 u_int32_t limit; 486 u_int32_t seconds; 487 } max_src_conn_rate; 488 u_int32_t qid; 489 u_int32_t pqid; 490 u_int32_t rt_listid; 491 u_int32_t nr; 492 u_int32_t prob; 493 uid_t cuid; 494 pid_t cpid; 495 496 counter_u64_t states_cur; 497 counter_u64_t states_tot; 498 counter_u64_t src_nodes; 499 500 u_int16_t return_icmp; 501 u_int16_t return_icmp6; 502 u_int16_t max_mss; 503 u_int16_t tag; 504 u_int16_t match_tag; 505 u_int16_t scrub_flags; 506 507 struct pf_rule_uid uid; 508 struct pf_rule_gid gid; 509 510 u_int32_t rule_flag; 511 u_int8_t action; 512 u_int8_t direction; 513 u_int8_t log; 514 u_int8_t logif; 515 u_int8_t quick; 516 u_int8_t ifnot; 517 u_int8_t match_tag_not; 518 u_int8_t natpass; 519 520 #define PF_STATE_NORMAL 0x1 521 #define PF_STATE_MODULATE 0x2 522 #define PF_STATE_SYNPROXY 0x3 523 u_int8_t keep_state; 524 sa_family_t af; 525 u_int8_t proto; 526 u_int8_t type; 527 u_int8_t code; 528 u_int8_t flags; 529 u_int8_t flagset; 530 u_int8_t min_ttl; 531 u_int8_t allow_opts; 532 u_int8_t rt; 533 u_int8_t return_ttl; 534 u_int8_t tos; 535 u_int8_t set_tos; 536 u_int8_t anchor_relative; 537 u_int8_t anchor_wildcard; 538 539 #define PF_FLUSH 0x01 540 #define PF_FLUSH_GLOBAL 0x02 541 u_int8_t flush; 542 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 543 #define PF_PRIO_MAX 7 544 u_int8_t prio; 545 u_int8_t set_prio[2]; 546 547 struct { 548 struct pf_addr addr; 549 u_int16_t port; 550 } divert; 551 552 uint64_t u_states_cur; 553 uint64_t u_states_tot; 554 uint64_t u_src_nodes; 555 }; 556 557 /* rule flags */ 558 #define PFRULE_DROP 0x0000 559 #define PFRULE_RETURNRST 0x0001 560 #define PFRULE_FRAGMENT 0x0002 561 #define PFRULE_RETURNICMP 0x0004 562 #define PFRULE_RETURN 0x0008 563 #define PFRULE_NOSYNC 0x0010 564 #define PFRULE_SRCTRACK 0x0020 /* track source states */ 565 #define PFRULE_RULESRCTRACK 0x0040 /* per rule */ 566 567 #ifdef _KERNEL 568 #define PFRULE_REFS 0x0080 /* rule has references */ 569 #endif 570 571 /* scrub flags */ 572 #define PFRULE_NODF 0x0100 573 #define PFRULE_RANDOMID 0x0800 574 #define PFRULE_REASSEMBLE_TCP 0x1000 575 #define PFRULE_SET_TOS 0x2000 576 577 /* rule flags again */ 578 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 579 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 580 581 #define PFSTATE_HIWAT 100000 /* default state table size */ 582 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 583 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 584 585 586 struct pf_threshold { 587 u_int32_t limit; 588 #define PF_THRESHOLD_MULT 1000 589 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 590 u_int32_t seconds; 591 u_int32_t count; 592 u_int32_t last; 593 }; 594 595 struct pf_src_node { 596 LIST_ENTRY(pf_src_node) entry; 597 struct pf_addr addr; 598 struct pf_addr raddr; 599 union pf_rule_ptr rule; 600 struct pfi_kif *kif; 601 u_int64_t bytes[2]; 602 u_int64_t packets[2]; 603 u_int32_t states; 604 u_int32_t conn; 605 struct pf_threshold conn_rate; 606 u_int32_t creation; 607 u_int32_t expire; 608 sa_family_t af; 609 u_int8_t ruletype; 610 }; 611 612 #define PFSNODE_HIWAT 10000 /* default source node table size */ 613 614 TAILQ_HEAD(pf_rulequeue, pf_rule); 615 616 struct pf_anchor; 617 618 struct pf_ruleset { 619 struct { 620 struct pf_rulequeue queues[2]; 621 struct { 622 struct pf_rulequeue *ptr; 623 struct pf_rule **ptr_array; 624 u_int32_t rcount; 625 u_int32_t ticket; 626 int open; 627 } active, inactive; 628 } rules[PF_RULESET_MAX]; 629 struct pf_anchor *anchor; 630 u_int32_t tticket; 631 int tables; 632 int topen; 633 }; 634 635 RB_HEAD(pf_anchor_global, pf_anchor); 636 RB_HEAD(pf_anchor_node, pf_anchor); 637 struct pf_anchor { 638 RB_ENTRY(pf_anchor) entry_global; 639 RB_ENTRY(pf_anchor) entry_node; 640 struct pf_anchor *parent; 641 struct pf_anchor_node children; 642 char name[PF_ANCHOR_NAME_SIZE]; 643 char path[MAXPATHLEN]; 644 struct pf_ruleset ruleset; 645 int refcnt; /* anchor rules */ 646 int match; /* XXX: used for pfctl black magic */ 647 }; 648 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 649 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 650 651 int pf_get_ruleset_number(u_int8_t); 652 653 #endif /* _NET_PF_H_ */ 654