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 */ 33 34 #ifndef _NET_PF_H_ 35 #define _NET_PF_H_ 36 37 #include <sys/tree.h> 38 39 #define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0) 40 #define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1) 41 42 #define PF_MD5_DIGEST_LENGTH 16 43 #ifdef MD5_DIGEST_LENGTH 44 #if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH 45 #error 46 #endif 47 #endif 48 49 enum { PF_INOUT, PF_IN, PF_OUT }; 50 enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT, 51 PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP, PF_DEFER, 52 PF_MATCH, PF_AFRT, PF_RT }; 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 enum { PF_PEER_SRC, PF_PEER_DST, PF_PEER_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 { 70 PFTM_TCP_FIRST_PACKET = 0, 71 PFTM_TCP_OPENING = 1, 72 PFTM_TCP_ESTABLISHED = 2, 73 PFTM_TCP_CLOSING = 3, 74 PFTM_TCP_FIN_WAIT = 4, 75 PFTM_TCP_CLOSED = 5, 76 PFTM_UDP_FIRST_PACKET = 6, 77 PFTM_UDP_SINGLE = 7, 78 PFTM_UDP_MULTIPLE = 8, 79 PFTM_ICMP_FIRST_PACKET = 9, 80 PFTM_ICMP_ERROR_REPLY = 10, 81 PFTM_OTHER_FIRST_PACKET = 11, 82 PFTM_OTHER_SINGLE = 12, 83 PFTM_OTHER_MULTIPLE = 13, 84 PFTM_FRAG = 14, 85 PFTM_INTERVAL = 15, 86 PFTM_ADAPTIVE_START = 16, 87 PFTM_ADAPTIVE_END = 17, 88 PFTM_SRC_NODE = 18, 89 PFTM_TS_DIFF = 19, 90 PFTM_OLD_MAX = 20, /* Legacy limit, for binary compatibility with old kernels. */ 91 PFTM_SCTP_FIRST_PACKET = 20, 92 PFTM_SCTP_OPENING = 21, 93 PFTM_SCTP_ESTABLISHED = 22, 94 PFTM_SCTP_CLOSING = 23, 95 PFTM_SCTP_CLOSED = 24, 96 PFTM_MAX = 25, 97 PFTM_PURGE = 26, 98 PFTM_UNLINKED = 27, 99 }; 100 101 /* PFTM default values */ 102 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 103 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 104 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 105 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 106 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 107 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 108 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 109 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 110 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 111 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 112 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 113 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 114 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 115 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 116 #define PFTM_FRAG_VAL 60 /* Fragment expire */ 117 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 118 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 119 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 120 121 enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 122 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 123 PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX }; 124 #define PF_POOL_IDMASK 0x0f 125 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 126 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN }; 127 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 128 PF_ADDR_TABLE, PF_ADDR_URPFFAILED, 129 PF_ADDR_RANGE, PF_ADDR_NONE }; 130 #define PF_POOL_TYPEMASK 0x0f 131 #define PF_POOL_STICKYADDR 0x20 132 #define PF_POOL_ENDPI 0x40 133 #define PF_WSCALE_FLAG 0x80 134 #define PF_WSCALE_MASK 0x0f 135 136 #define PF_POOL_DYNTYPE(_o) \ 137 ((((_o) & PF_POOL_TYPEMASK) == PF_POOL_ROUNDROBIN) || \ 138 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_RANDOM) || \ 139 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_SRCHASH)) 140 141 #define PF_LOG 0x01 142 #define PF_LOG_ALL 0x02 143 #define PF_LOG_SOCKET_LOOKUP 0x04 144 #define PF_LOG_FORCE 0x08 145 #define PF_LOG_MATCHES 0x10 146 147 /* Reasons code for passing/dropping a packet */ 148 #define PFRES_MATCH 0 /* Explicit match of a rule */ 149 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 150 #define PFRES_FRAG 2 /* Dropping following fragment */ 151 #define PFRES_SHORT 3 /* Dropping short packet */ 152 #define PFRES_NORM 4 /* Dropping by normalizer */ 153 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 154 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 155 #define PFRES_CONGEST 7 /* Congestion (of ipintrq) */ 156 #define PFRES_IPOPTIONS 8 /* IP option */ 157 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 158 #define PFRES_BADSTATE 10 /* State mismatch */ 159 #define PFRES_STATEINS 11 /* State insertion failure */ 160 #define PFRES_MAXSTATES 12 /* State limit */ 161 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 162 #define PFRES_SYNPROXY 14 /* SYN proxy */ 163 #define PFRES_MAPFAILED 15 /* pf_map_addr() failed */ 164 #define PFRES_TRANSLATE 16 /* No translation address available */ 165 #define PFRES_MAX 17 /* total+1 */ 166 167 #define PFRES_NAMES { \ 168 "match", \ 169 "bad-offset", \ 170 "fragment", \ 171 "short", \ 172 "normalize", \ 173 "memory", \ 174 "bad-timestamp", \ 175 "congestion", \ 176 "ip-option", \ 177 "proto-cksum", \ 178 "state-mismatch", \ 179 "state-insert", \ 180 "state-limit", \ 181 "src-limit", \ 182 "synproxy", \ 183 "map-failed", \ 184 "translate", \ 185 NULL \ 186 } 187 188 /* Counters for other things we want to keep track of */ 189 #define LCNT_STATES 0 /* states */ 190 #define LCNT_SRCSTATES 1 /* max-src-states */ 191 #define LCNT_SRCNODES 2 /* max-src-nodes */ 192 #define LCNT_SRCCONN 3 /* max-src-conn */ 193 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 194 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 195 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 196 #define LCNT_MAX 7 /* total+1 */ 197 /* Only available via the nvlist-based API */ 198 #define KLCNT_SYNFLOODS 7 /* synfloods detected */ 199 #define KLCNT_SYNCOOKIES_SENT 8 /* syncookies sent */ 200 #define KLCNT_SYNCOOKIES_VALID 9 /* syncookies validated */ 201 #define KLCNT_MAX 10 /* total+1 */ 202 203 #define LCNT_NAMES { \ 204 "max states per rule", \ 205 "max-src-states", \ 206 "max-src-nodes", \ 207 "max-src-conn", \ 208 "max-src-conn-rate", \ 209 "overload table insertion", \ 210 "overload flush states", \ 211 NULL \ 212 } 213 #define KLCNT_NAMES { \ 214 "max states per rule", \ 215 "max-src-states", \ 216 "max-src-nodes", \ 217 "max-src-conn", \ 218 "max-src-conn-rate", \ 219 "overload table insertion", \ 220 "overload flush states", \ 221 "synfloods detected", \ 222 "syncookies sent", \ 223 "syncookies validated", \ 224 NULL \ 225 } 226 227 /* state operation counters */ 228 #define FCNT_STATE_SEARCH 0 229 #define FCNT_STATE_INSERT 1 230 #define FCNT_STATE_REMOVALS 2 231 #define FCNT_MAX 3 232 233 #ifdef _KERNEL 234 #define FCNT_NAMES { \ 235 "searches", \ 236 "inserts", \ 237 "removals", \ 238 NULL \ 239 } 240 #endif 241 242 /* src_node operation counters */ 243 #define SCNT_SRC_NODE_SEARCH 0 244 #define SCNT_SRC_NODE_INSERT 1 245 #define SCNT_SRC_NODE_REMOVALS 2 246 #define SCNT_MAX 3 247 248 #define PF_TABLE_NAME_SIZE 32 249 #define PF_QNAME_SIZE 64 250 251 struct pfioc_nv { 252 void *data; 253 size_t len; /* The length of the nvlist data. */ 254 size_t size; /* The total size of the data buffer. */ 255 }; 256 257 struct pf_rule; 258 259 /* keep synced with pfi_kif, used in RB_FIND */ 260 struct pfi_kif_cmp { 261 char pfik_name[IFNAMSIZ]; 262 }; 263 264 struct pfi_kif { 265 char pfik_name[IFNAMSIZ]; 266 union { 267 RB_ENTRY(pfi_kif) pfik_tree; 268 LIST_ENTRY(pfi_kif) pfik_list; 269 }; 270 u_int64_t pfik_packets[2][2][2]; 271 u_int64_t pfik_bytes[2][2][2]; 272 u_int32_t pfik_tzero; 273 u_int pfik_flags; 274 struct ifnet *pfik_ifp; 275 struct ifg_group *pfik_group; 276 u_int pfik_rulerefs; 277 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 278 }; 279 280 struct pf_status { 281 uint64_t counters[PFRES_MAX]; 282 uint64_t lcounters[LCNT_MAX]; 283 uint64_t fcounters[FCNT_MAX]; 284 uint64_t scounters[SCNT_MAX]; 285 uint64_t pcounters[2][2][3]; 286 uint64_t bcounters[2][2]; 287 uint32_t running; 288 uint32_t states; 289 uint32_t src_nodes; 290 uint32_t since; 291 uint32_t debug; 292 uint32_t hostid; 293 char ifname[IFNAMSIZ]; 294 uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 295 }; 296 297 #define PF_REASS_ENABLED 0x01 298 #define PF_REASS_NODF 0x02 299 300 struct pf_addr { 301 union { 302 struct in_addr v4; 303 struct in6_addr v6; 304 u_int8_t addr8[16]; 305 u_int16_t addr16[8]; 306 u_int32_t addr32[4]; 307 }; /* 128-bit address */ 308 }; 309 310 #define PFI_AFLAG_NETWORK 0x01 311 #define PFI_AFLAG_BROADCAST 0x02 312 #define PFI_AFLAG_PEER 0x04 313 #define PFI_AFLAG_MODEMASK 0x07 314 #define PFI_AFLAG_NOALIAS 0x08 315 316 struct pf_addr_wrap { 317 union { 318 struct { 319 struct pf_addr addr; 320 struct pf_addr mask; 321 } a; 322 char ifname[IFNAMSIZ]; 323 char tblname[PF_TABLE_NAME_SIZE]; 324 } v; 325 union { 326 struct pfi_dynaddr *dyn; 327 struct pfr_ktable *tbl; 328 int dyncnt; 329 int tblcnt; 330 } p; 331 u_int8_t type; /* PF_ADDR_* */ 332 u_int8_t iflags; /* PFI_AFLAG_* */ 333 }; 334 335 union pf_rule_ptr { 336 struct pf_rule *ptr; 337 u_int32_t nr; 338 }; 339 340 struct pf_rule_uid { 341 uid_t uid[2]; 342 u_int8_t op; 343 }; 344 345 struct pf_rule_gid { 346 uid_t gid[2]; 347 u_int8_t op; 348 }; 349 350 struct pf_rule_addr { 351 struct pf_addr_wrap addr; 352 u_int16_t port[2]; 353 u_int8_t neg; 354 u_int8_t port_op; 355 }; 356 357 struct pf_pooladdr { 358 struct pf_addr_wrap addr; 359 TAILQ_ENTRY(pf_pooladdr) entries; 360 char ifname[IFNAMSIZ]; 361 struct pfi_kif *kif; 362 }; 363 364 TAILQ_HEAD(pf_palist, pf_pooladdr); 365 366 struct pf_poolhashkey { 367 union { 368 u_int8_t key8[16]; 369 u_int16_t key16[8]; 370 u_int32_t key32[4]; 371 }; /* 128-bit hash key */ 372 }; 373 374 struct pf_mape_portset { 375 u_int8_t offset; 376 u_int8_t psidlen; 377 u_int16_t psid; 378 }; 379 380 struct pf_pool { 381 struct pf_palist list; 382 struct pf_pooladdr *cur; 383 struct pf_poolhashkey key; 384 struct pf_addr counter; 385 int tblidx; 386 u_int16_t proxy_port[2]; 387 u_int8_t opts; 388 }; 389 390 /* A packed Operating System description for fingerprinting */ 391 typedef u_int32_t pf_osfp_t; 392 #define PF_OSFP_ANY ((pf_osfp_t)0) 393 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 394 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 395 396 struct pf_osfp_entry { 397 SLIST_ENTRY(pf_osfp_entry) fp_entry; 398 pf_osfp_t fp_os; 399 int fp_enflags; 400 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 401 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 402 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 403 #define PF_OSFP_LEN 32 404 char fp_class_nm[PF_OSFP_LEN]; 405 char fp_version_nm[PF_OSFP_LEN]; 406 char fp_subtype_nm[PF_OSFP_LEN]; 407 }; 408 #define PF_OSFP_ENTRY_EQ(a, b) \ 409 ((a)->fp_os == (b)->fp_os && \ 410 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 411 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 412 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 413 414 /* handle pf_osfp_t packing */ 415 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 416 #define _FP_UNUSED_BITS 1 417 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 418 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 419 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 420 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 421 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 422 ((1 << _FP_CLASS_BITS) - 1); \ 423 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 424 ((1 << _FP_VERSION_BITS) - 1);\ 425 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 426 } while(0) 427 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 428 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 429 + _FP_SUBTYPE_BITS); \ 430 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 431 _FP_SUBTYPE_BITS; \ 432 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 433 } while(0) 434 435 /* the fingerprint of an OSes TCP SYN packet */ 436 typedef u_int64_t pf_tcpopts_t; 437 struct pf_os_fingerprint { 438 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 439 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 440 u_int16_t fp_wsize; /* TCP window size */ 441 u_int16_t fp_psize; /* ip->ip_len */ 442 u_int16_t fp_mss; /* TCP MSS */ 443 u_int16_t fp_flags; 444 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 445 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 446 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 447 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 448 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 449 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 450 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 451 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 452 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 453 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 454 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 455 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 456 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 457 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 458 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 459 u_int8_t fp_optcnt; /* TCP option count */ 460 u_int8_t fp_wscale; /* TCP window scaling */ 461 u_int8_t fp_ttl; /* IPv4 TTL */ 462 #define PF_OSFP_MAXTTL_OFFSET 40 463 /* TCP options packing */ 464 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 465 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 466 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 467 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 468 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 469 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 470 #define PF_OSFP_MAX_OPTS \ 471 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 472 / PF_OSFP_TCPOPT_BITS 473 474 SLIST_ENTRY(pf_os_fingerprint) fp_next; 475 }; 476 477 struct pf_osfp_ioctl { 478 struct pf_osfp_entry fp_os; 479 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 480 u_int16_t fp_wsize; /* TCP window size */ 481 u_int16_t fp_psize; /* ip->ip_len */ 482 u_int16_t fp_mss; /* TCP MSS */ 483 u_int16_t fp_flags; 484 u_int8_t fp_optcnt; /* TCP option count */ 485 u_int8_t fp_wscale; /* TCP window scaling */ 486 u_int8_t fp_ttl; /* IPv4 TTL */ 487 488 int fp_getnum; /* DIOCOSFPGET number */ 489 }; 490 491 #define PF_ANCHOR_NAME_SIZE 64 492 493 struct pf_rule { 494 struct pf_rule_addr src; 495 struct pf_rule_addr dst; 496 #define PF_SKIP_IFP 0 497 #define PF_SKIP_DIR 1 498 #define PF_SKIP_AF 2 499 #define PF_SKIP_PROTO 3 500 #define PF_SKIP_SRC_ADDR 4 501 #define PF_SKIP_DST_ADDR 5 502 #define PF_SKIP_SRC_PORT 6 503 #define PF_SKIP_DST_PORT 7 504 #define PF_SKIP_COUNT 8 505 union pf_rule_ptr skip[PF_SKIP_COUNT]; 506 #define PF_RULE_LABEL_SIZE 64 507 #define PF_RULE_MAX_LABEL_COUNT 5 508 char label[PF_RULE_LABEL_SIZE]; 509 char ifname[IFNAMSIZ]; 510 char qname[PF_QNAME_SIZE]; 511 char pqname[PF_QNAME_SIZE]; 512 #define PF_TAG_NAME_SIZE 64 513 char tagname[PF_TAG_NAME_SIZE]; 514 char match_tagname[PF_TAG_NAME_SIZE]; 515 516 char overload_tblname[PF_TABLE_NAME_SIZE]; 517 518 TAILQ_ENTRY(pf_rule) entries; 519 struct pf_pool rpool; 520 521 u_int64_t evaluations; 522 u_int64_t packets[2]; 523 u_int64_t bytes[2]; 524 525 struct pfi_kif *kif; 526 struct pf_anchor *anchor; 527 struct pfr_ktable *overload_tbl; 528 529 pf_osfp_t os_fingerprint; 530 531 int rtableid; 532 u_int32_t timeout[PFTM_OLD_MAX]; 533 u_int32_t max_states; 534 u_int32_t max_src_nodes; 535 u_int32_t max_src_states; 536 u_int32_t max_src_conn; 537 struct { 538 u_int32_t limit; 539 u_int32_t seconds; 540 } max_src_conn_rate; 541 u_int32_t qid; 542 u_int32_t pqid; 543 u_int32_t rt_listid; 544 u_int32_t nr; 545 u_int32_t prob; 546 uid_t cuid; 547 pid_t cpid; 548 549 counter_u64_t states_cur; 550 counter_u64_t states_tot; 551 counter_u64_t src_nodes; 552 553 u_int16_t return_icmp; 554 u_int16_t return_icmp6; 555 u_int16_t max_mss; 556 u_int16_t tag; 557 u_int16_t match_tag; 558 u_int16_t scrub_flags; 559 560 struct pf_rule_uid uid; 561 struct pf_rule_gid gid; 562 563 u_int32_t rule_flag; 564 u_int8_t action; 565 u_int8_t direction; 566 u_int8_t log; 567 u_int8_t logif; 568 u_int8_t quick; 569 u_int8_t ifnot; 570 u_int8_t match_tag_not; 571 u_int8_t natpass; 572 573 #define PF_STATE_NORMAL 0x1 574 #define PF_STATE_MODULATE 0x2 575 #define PF_STATE_SYNPROXY 0x3 576 u_int8_t keep_state; 577 sa_family_t af; 578 u_int8_t proto; 579 u_int8_t type; 580 u_int8_t code; 581 u_int8_t flags; 582 u_int8_t flagset; 583 u_int8_t min_ttl; 584 u_int8_t allow_opts; 585 u_int8_t rt; 586 u_int8_t return_ttl; 587 u_int8_t tos; 588 u_int8_t set_tos; 589 u_int8_t anchor_relative; 590 u_int8_t anchor_wildcard; 591 592 #define PF_FLUSH 0x01 593 #define PF_FLUSH_GLOBAL 0x02 594 u_int8_t flush; 595 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 596 #define PF_PRIO_MAX 7 597 u_int8_t prio; 598 u_int8_t set_prio[2]; 599 600 struct { 601 struct pf_addr addr; 602 u_int16_t port; 603 } divert; 604 605 uint64_t u_states_cur; 606 uint64_t u_states_tot; 607 uint64_t u_src_nodes; 608 }; 609 610 /* pf_krule->rule_flag and old-style scrub flags */ 611 #define PFRULE_DROP 0x00000000 612 #define PFRULE_RETURNRST 0x00000001 613 #define PFRULE_FRAGMENT 0x00000002 614 #define PFRULE_RETURNICMP 0x00000004 615 #define PFRULE_RETURN 0x00000008 616 #define PFRULE_NOSYNC 0x00000010 617 #define PFRULE_SRCTRACK 0x00000020 /* track source states */ 618 #define PFRULE_RULESRCTRACK 0x00000040 /* per rule */ 619 #define PFRULE_NODF 0x00000100 620 #define PFRULE_FRAGMENT_NOREASS 0x00000200 621 #define PFRULE_RANDOMID 0x00000800 622 #define PFRULE_REASSEMBLE_TCP 0x00001000 623 #define PFRULE_SET_TOS 0x00002000 624 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 625 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 626 #define PFRULE_PFLOW 0x00040000 627 #define PFRULE_ALLOW_RELATED 0x00080000 628 #define PFRULE_AFTO 0x00200000 /* af-to rule */ 629 630 #ifdef _KERNEL 631 #define PFRULE_REFS 0x0080 /* rule has references */ 632 #endif 633 634 /* pf_rule_actions->dnflags */ 635 #define PFRULE_DN_IS_PIPE 0x0040 636 #define PFRULE_DN_IS_QUEUE 0x0080 637 638 /* pf_state->state_flags, pf_rule_actions->flags, pf_krule->scrub_flags */ 639 #define PFSTATE_ALLOWOPTS 0x0001 640 #define PFSTATE_SLOPPY 0x0002 641 #define PFSTATE_PFLOW 0x0004 642 #define PFSTATE_NOSYNC 0x0008 643 #define PFSTATE_ACK 0x0010 644 #define PFSTATE_NODF 0x0020 645 #define PFSTATE_SETTOS 0x0040 646 #define PFSTATE_RANDOMID 0x0080 647 #define PFSTATE_SCRUB_TCP 0x0100 648 #define PFSTATE_SETPRIO 0x0200 649 /* was PFSTATE_INP_UNLINKED 0x0400 */ 650 /* FreeBSD-specific flags are added from the end to keep space for porting 651 * flags from OpenBSD */ 652 #define PFSTATE_DN_IS_PIPE 0x4000 653 #define PFSTATE_DN_IS_QUEUE 0x8000 654 #define PFSTATE_SCRUBMASK (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SCRUB_TCP) 655 #define PFSTATE_SETMASK (PFSTATE_SETTOS|PFSTATE_SETPRIO) 656 657 /* pfctl_state->src_node_flags */ 658 #define PFSTATE_SRC_NODE_LIMIT 0x01 659 #define PFSTATE_SRC_NODE_NAT 0x02 660 #define PFSTATE_SRC_NODE_ROUTE 0x04 661 #define PFSTATE_SRC_NODE_LIMIT_GLOBAL 0x10 662 663 #define PFSTATE_HIWAT 100000 /* default state table size */ 664 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 665 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 666 667 668 struct pf_threshold { 669 u_int32_t limit; 670 #define PF_THRESHOLD_MULT 1000 671 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 672 u_int32_t seconds; 673 u_int32_t count; 674 u_int32_t last; 675 }; 676 677 struct pf_src_node { 678 LIST_ENTRY(pf_src_node) entry; 679 struct pf_addr addr; 680 struct pf_addr raddr; 681 union pf_rule_ptr rule; 682 struct pfi_kif *kif; 683 u_int64_t bytes[2]; 684 u_int64_t packets[2]; 685 u_int32_t states; 686 u_int32_t conn; 687 struct pf_threshold conn_rate; 688 u_int32_t creation; 689 u_int32_t expire; 690 sa_family_t af; 691 sa_family_t naf; 692 u_int8_t ruletype; 693 }; 694 695 #define PFSNODE_HIWAT 10000 /* default source node table size */ 696 697 TAILQ_HEAD(pf_rulequeue, pf_rule); 698 699 struct pf_anchor; 700 701 struct pf_ruleset { 702 struct { 703 struct pf_rulequeue queues[2]; 704 struct { 705 struct pf_rulequeue *ptr; 706 struct pf_rule **ptr_array; 707 u_int32_t rcount; 708 u_int32_t ticket; 709 int open; 710 } active, inactive; 711 } rules[PF_RULESET_MAX]; 712 struct pf_anchor *anchor; 713 u_int32_t tticket; 714 int tables; 715 int topen; 716 }; 717 718 RB_HEAD(pf_anchor_global, pf_anchor); 719 RB_HEAD(pf_anchor_node, pf_anchor); 720 struct pf_anchor { 721 RB_ENTRY(pf_anchor) entry_global; 722 RB_ENTRY(pf_anchor) entry_node; 723 struct pf_anchor *parent; 724 struct pf_anchor_node children; 725 char name[PF_ANCHOR_NAME_SIZE]; 726 char path[MAXPATHLEN]; 727 struct pf_ruleset ruleset; 728 int refcnt; /* anchor rules */ 729 int match; /* XXX: used for pfctl black magic */ 730 }; 731 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare); 732 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare); 733 734 int pf_get_ruleset_number(u_int8_t); 735 736 #endif /* _NET_PF_H_ */ 737