1 /* $OpenBSD: pfvar.h,v 1.540 2024/10/12 23:31:14 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Daniel Hartmeier 5 * Copyright (c) 2002 - 2013 Henning Brauer <henning@openbsd.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * - Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * - Redistributions in binary form must reproduce the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer in the documentation and/or other materials provided 17 * with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 #ifndef _NET_PFVAR_H_ 35 #define _NET_PFVAR_H_ 36 37 #include <sys/queue.h> 38 #include <sys/tree.h> 39 #include <sys/syslimits.h> 40 #include <sys/refcnt.h> 41 #include <sys/timeout.h> 42 43 #include <netinet/in.h> 44 45 #include <net/radix.h> 46 #include <net/route.h> 47 48 struct ip; 49 struct ip6_hdr; 50 struct mbuf_list; 51 52 #define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0) 53 #define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1) 54 55 #define PF_MD5_DIGEST_LENGTH 16 56 #ifdef MD5_DIGEST_LENGTH 57 #if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH 58 #error md5 digest length mismatch 59 #endif 60 #endif 61 62 typedef struct refcnt pf_refcnt_t; 63 #define PF_REF_INIT(_x) refcnt_init(&(_x)) 64 #define PF_REF_TAKE(_x) refcnt_take(&(_x)) 65 #define PF_REF_RELE(_x) refcnt_rele(&(_x)) 66 67 enum { PF_INOUT, PF_IN, PF_OUT, PF_FWD }; 68 enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT, 69 PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP, PF_DEFER, 70 PF_MATCH, PF_DIVERT, PF_RT, PF_AFRT }; 71 enum { PF_TRANS_RULESET, PF_TRANS_TABLE }; 72 enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT, 73 PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG }; 74 enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL, 75 PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER, 76 PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET }; 77 enum { PF_GET_NONE, PF_GET_CLR_CNTR }; 78 enum { PF_SK_WIRE, PF_SK_STACK, PF_SK_BOTH }; 79 enum { PF_PEER_SRC, PF_PEER_DST, PF_PEER_BOTH }; 80 81 /* 82 * Note about PFTM_*: real indices into pf_rule.timeout[] come before 83 * PFTM_MAX, special cases afterwards. See pf_state_expires(). 84 */ 85 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED, 86 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED, 87 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE, 88 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY, 89 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE, 90 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL, 91 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE, 92 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED }; 93 94 /* PFTM default values */ 95 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 96 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 97 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 98 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 99 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 100 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 101 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 102 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 103 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 104 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 105 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 106 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 107 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 108 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 109 #define PFTM_FRAG_VAL 60 /* Fragment expire */ 110 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 111 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 112 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 113 114 /* 115 * For each connection (combination of proto,src,dst,af) the number 116 * of fragments is limited. Over the PFTM_FRAG interval the average 117 * rate must be less than PF_FRAG_STALE fragments per second. 118 * Otherwise older fragments are considered stale and are dropped. 119 */ 120 #define PF_FRAG_STALE 200 121 122 /* 123 * Limit the length of the fragment queue traversal. Remember 124 * search entry points based on the fragment offset. 125 */ 126 #define PF_FRAG_ENTRY_POINTS 16 127 128 /* 129 * The number of entries in the fragment queue must be limited 130 * to avoid DoS by linear searching. Instead of a global limit, 131 * use a limit per entry point. For large packets these sum up. 132 */ 133 #define PF_FRAG_ENTRY_LIMIT 64 134 135 enum { PF_NOPFROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 136 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 137 PF_LIMIT_TABLES, PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_PKTDELAY_PKTS, 138 PF_LIMIT_ANCHORS, PF_LIMIT_MAX }; 139 #define PF_POOL_IDMASK 0x0f 140 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 141 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN, PF_POOL_LEASTSTATES }; 142 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 143 PF_ADDR_TABLE, PF_ADDR_RTLABEL, PF_ADDR_URPFFAILED, 144 PF_ADDR_RANGE, PF_ADDR_NONE }; 145 #define PF_POOL_TYPEMASK 0x0f 146 #define PF_POOL_STICKYADDR 0x20 147 #define PF_WSCALE_FLAG 0x80 148 #define PF_WSCALE_MASK 0x0f 149 150 #define PF_POOL_DYNTYPE(_o) \ 151 ((((_o) & PF_POOL_TYPEMASK) == PF_POOL_ROUNDROBIN) || \ 152 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_LEASTSTATES) || \ 153 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_RANDOM) || \ 154 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_SRCHASH)) 155 156 #define PF_LOG 0x01 157 #define PF_LOG_ALL 0x02 158 #define PF_LOG_USER 0x04 159 #define PF_LOG_FORCE 0x08 160 #define PF_LOG_MATCHES 0x10 161 162 struct pf_addr { 163 union { 164 struct in_addr v4; 165 struct in6_addr v6; 166 u_int8_t addr8[16]; 167 u_int16_t addr16[8]; 168 u_int32_t addr32[4]; 169 } pfa; /* 128-bit address */ 170 #define v4 pfa.v4 171 #define v6 pfa.v6 172 #define addr8 pfa.addr8 173 #define addr16 pfa.addr16 174 #define addr32 pfa.addr32 175 }; 176 177 #define PF_TABLE_NAME_SIZE 32 178 179 #define PFI_AFLAG_NETWORK 0x01 180 #define PFI_AFLAG_BROADCAST 0x02 181 #define PFI_AFLAG_PEER 0x04 182 #define PFI_AFLAG_MODEMASK 0x07 183 #define PFI_AFLAG_NOALIAS 0x08 184 185 struct pf_addr_wrap { 186 union { 187 struct { 188 struct pf_addr addr; 189 struct pf_addr mask; 190 } a; 191 char ifname[IFNAMSIZ]; 192 char tblname[PF_TABLE_NAME_SIZE]; 193 char rtlabelname[RTLABEL_LEN]; 194 u_int32_t rtlabel; 195 } v; 196 union { 197 struct pfi_dynaddr *dyn; 198 struct pfr_ktable *tbl; 199 int dyncnt; 200 int tblcnt; 201 } p; 202 u_int8_t type; /* PF_ADDR_* */ 203 u_int8_t iflags; /* PFI_AFLAG_* */ 204 }; 205 206 #ifdef _KERNEL 207 struct pfi_dynaddr { 208 TAILQ_ENTRY(pfi_dynaddr) entry; 209 struct pf_addr pfid_addr4; 210 struct pf_addr pfid_mask4; 211 struct pf_addr pfid_addr6; 212 struct pf_addr pfid_mask6; 213 struct pfr_ktable *pfid_kt; 214 struct pfi_kif *pfid_kif; 215 void *pfid_hook_cookie; 216 int pfid_net; /* mask or 128 */ 217 int pfid_acnt4; /* address count IPv4 */ 218 int pfid_acnt6; /* address count IPv6 */ 219 sa_family_t pfid_af; /* rule af */ 220 u_int8_t pfid_iflags; /* PFI_AFLAG_* */ 221 }; 222 #endif /* _KERNEL */ 223 224 225 /* 226 * Logging macros 227 */ 228 229 #ifndef PF_DEBUGNAME 230 #define PF_DEBUGNAME "pf: " 231 #endif 232 233 #ifdef _KERNEL 234 #define DPFPRINTF(n, format, x...) \ 235 do { \ 236 if (pf_status.debug >= (n)) { \ 237 log(n, PF_DEBUGNAME); \ 238 addlog(format, ##x); \ 239 addlog("\n"); \ 240 } \ 241 } while (0) 242 #else 243 #ifdef PFDEBUG 244 #define DPFPRINTF(n, format, x...) \ 245 do { \ 246 fprintf(stderr, format, ##x); \ 247 fprintf(stderr, "\n"); \ 248 } while (0) 249 #else 250 #define DPFPRINTF(n, format, x...) ((void)0) 251 #endif /* PFDEBUG */ 252 #endif /* _KERNEL */ 253 254 255 /* 256 * Address manipulation macros 257 */ 258 259 #define PF_AEQ(a, b, c) \ 260 ((c == AF_INET && (a)->addr32[0] == (b)->addr32[0]) || \ 261 (c == AF_INET6 && \ 262 (a)->addr32[3] == (b)->addr32[3] && \ 263 (a)->addr32[2] == (b)->addr32[2] && \ 264 (a)->addr32[1] == (b)->addr32[1] && \ 265 (a)->addr32[0] == (b)->addr32[0])) \ 266 267 #define PF_ANEQ(a, b, c) \ 268 ((c == AF_INET && (a)->addr32[0] != (b)->addr32[0]) || \ 269 (c == AF_INET6 && \ 270 ((a)->addr32[3] != (b)->addr32[3] || \ 271 (a)->addr32[2] != (b)->addr32[2] || \ 272 (a)->addr32[1] != (b)->addr32[1] || \ 273 (a)->addr32[0] != (b)->addr32[0]))) \ 274 275 #define PF_AZERO(a, c) \ 276 ((c == AF_INET && !(a)->addr32[0]) || \ 277 (c == AF_INET6 && \ 278 !(a)->addr32[0] && !(a)->addr32[1] && \ 279 !(a)->addr32[2] && !(a)->addr32[3] )) \ 280 281 #define PF_MISMATCHAW(aw, x, af, neg, ifp, rtid) \ 282 ( \ 283 (((aw)->type == PF_ADDR_NOROUTE && \ 284 pf_routable((x), (af), NULL, (rtid))) || \ 285 (((aw)->type == PF_ADDR_URPFFAILED && (ifp) != NULL && \ 286 pf_routable((x), (af), (ifp), (rtid))) || \ 287 ((aw)->type == PF_ADDR_RTLABEL && \ 288 !pf_rtlabel_match((x), (af), (aw), (rtid))) || \ 289 ((aw)->type == PF_ADDR_TABLE && \ 290 !pfr_match_addr((aw)->p.tbl, (x), (af))) || \ 291 ((aw)->type == PF_ADDR_DYNIFTL && \ 292 !pfi_match_addr((aw)->p.dyn, (x), (af))) || \ 293 ((aw)->type == PF_ADDR_RANGE && \ 294 !pf_match_addr_range(&(aw)->v.a.addr, \ 295 &(aw)->v.a.mask, (x), (af))) || \ 296 ((aw)->type == PF_ADDR_ADDRMASK && \ 297 !PF_AZERO(&(aw)->v.a.mask, (af)) && \ 298 !pf_match_addr(0, &(aw)->v.a.addr, \ 299 &(aw)->v.a.mask, (x), (af))))) != \ 300 (neg) \ 301 ) 302 303 struct pf_rule_uid { 304 uid_t uid[2]; 305 u_int8_t op; 306 }; 307 308 struct pf_rule_gid { 309 uid_t gid[2]; 310 u_int8_t op; 311 }; 312 313 struct pf_rule_addr { 314 struct pf_addr_wrap addr; 315 u_int16_t port[2]; 316 u_int8_t neg; 317 u_int8_t port_op; 318 u_int16_t weight; 319 }; 320 321 struct pf_threshold { 322 u_int32_t limit; 323 #define PF_THRESHOLD_MULT 1000 324 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 325 u_int32_t seconds; 326 u_int32_t count; 327 u_int32_t last; 328 }; 329 330 struct pf_poolhashkey { 331 union { 332 u_int8_t key8[16]; 333 u_int16_t key16[8]; 334 u_int32_t key32[4]; 335 } pfk; /* 128-bit hash key */ 336 #define key8 pfk.key8 337 #define key16 pfk.key16 338 #define key32 pfk.key32 339 }; 340 341 struct pf_pool { 342 struct pf_addr_wrap addr; 343 struct pf_poolhashkey key; 344 struct pf_addr counter; 345 char ifname[IFNAMSIZ]; 346 struct pfi_kif *kif; 347 int tblidx; 348 u_int64_t states; 349 int curweight; 350 u_int16_t weight; 351 u_int16_t proxy_port[2]; 352 u_int8_t port_op; 353 u_int8_t opts; 354 }; 355 356 /* A packed Operating System description for fingerprinting */ 357 typedef u_int32_t pf_osfp_t; 358 #define PF_OSFP_ANY ((pf_osfp_t)0) 359 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 360 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 361 362 struct pf_osfp_entry { 363 SLIST_ENTRY(pf_osfp_entry) fp_entry; 364 pf_osfp_t fp_os; 365 int fp_enflags; 366 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 367 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 368 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 369 #define PF_OSFP_LEN 32 370 u_char fp_class_nm[PF_OSFP_LEN]; 371 u_char fp_version_nm[PF_OSFP_LEN]; 372 u_char fp_subtype_nm[PF_OSFP_LEN]; 373 }; 374 #define PF_OSFP_ENTRY_EQ(a, b) \ 375 ((a)->fp_os == (b)->fp_os && \ 376 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 377 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 378 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 379 380 /* handle pf_osfp_t packing */ 381 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 382 #define _FP_UNUSED_BITS 1 383 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 384 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 385 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 386 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 387 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 388 ((1 << _FP_CLASS_BITS) - 1); \ 389 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 390 ((1 << _FP_VERSION_BITS) - 1);\ 391 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 392 } while(0) 393 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 394 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 395 + _FP_SUBTYPE_BITS); \ 396 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 397 _FP_SUBTYPE_BITS; \ 398 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 399 } while(0) 400 401 /* the fingerprint of an OSes TCP SYN packet */ 402 typedef u_int64_t pf_tcpopts_t; 403 struct pf_os_fingerprint { 404 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 405 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 406 u_int16_t fp_wsize; /* TCP window size */ 407 u_int16_t fp_psize; /* ip->ip_len */ 408 u_int16_t fp_mss; /* TCP MSS */ 409 u_int16_t fp_flags; 410 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 411 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 412 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 413 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 414 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 415 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 416 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 417 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 418 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 419 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 420 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 421 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 422 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 423 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 424 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 425 u_int8_t fp_optcnt; /* TCP option count */ 426 u_int8_t fp_wscale; /* TCP window scaling */ 427 u_int8_t fp_ttl; /* IPv4 TTL */ 428 #define PF_OSFP_MAXTTL_OFFSET 40 429 /* TCP options packing */ 430 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 431 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 432 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 433 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 434 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 435 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 436 #define PF_OSFP_MAX_OPTS \ 437 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 438 / PF_OSFP_TCPOPT_BITS 439 440 SLIST_ENTRY(pf_os_fingerprint) fp_next; 441 }; 442 443 struct pf_osfp_ioctl { 444 struct pf_osfp_entry fp_os; 445 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 446 u_int16_t fp_wsize; /* TCP window size */ 447 u_int16_t fp_psize; /* ip->ip_len */ 448 u_int16_t fp_mss; /* TCP MSS */ 449 u_int16_t fp_flags; 450 u_int8_t fp_optcnt; /* TCP option count */ 451 u_int8_t fp_wscale; /* TCP window scaling */ 452 u_int8_t fp_ttl; /* IPv4 TTL */ 453 454 int fp_getnum; /* DIOCOSFPGET number */ 455 }; 456 457 struct pf_rule_actions { 458 int rtableid; 459 u_int16_t qid; 460 u_int16_t pqid; 461 u_int16_t max_mss; 462 u_int16_t flags; 463 u_int16_t delay; 464 u_int8_t log; 465 u_int8_t set_tos; 466 u_int8_t min_ttl; 467 u_int8_t set_prio[2]; 468 u_int8_t pad[1]; 469 }; 470 471 union pf_rule_ptr { 472 struct pf_rule *ptr; 473 u_int32_t nr; 474 }; 475 476 #define PF_ANCHOR_STACK_MAX 64 477 #define PF_ANCHOR_NAME_SIZE 64 478 #define PF_ANCHOR_MAXPATH (PATH_MAX - PF_ANCHOR_NAME_SIZE - 1) 479 #define PF_ANCHOR_HIWAT 512 480 #define PF_OPTIMIZER_TABLE_PFX "__automatic_" 481 482 struct pf_rule { 483 struct pf_rule_addr src; 484 struct pf_rule_addr dst; 485 #define PF_SKIP_IFP 0 486 #define PF_SKIP_DIR 1 487 #define PF_SKIP_RDOM 2 488 #define PF_SKIP_AF 3 489 #define PF_SKIP_PROTO 4 490 #define PF_SKIP_SRC_ADDR 5 491 #define PF_SKIP_DST_ADDR 6 492 #define PF_SKIP_SRC_PORT 7 493 #define PF_SKIP_DST_PORT 8 494 #define PF_SKIP_COUNT 9 495 union pf_rule_ptr skip[PF_SKIP_COUNT]; 496 #define PF_RULE_LABEL_SIZE 64 497 char label[PF_RULE_LABEL_SIZE]; 498 #define PF_QNAME_SIZE 64 499 char ifname[IFNAMSIZ]; 500 char rcv_ifname[IFNAMSIZ]; 501 char qname[PF_QNAME_SIZE]; 502 char pqname[PF_QNAME_SIZE]; 503 #define PF_TAG_NAME_SIZE 64 504 char tagname[PF_TAG_NAME_SIZE]; 505 char match_tagname[PF_TAG_NAME_SIZE]; 506 507 char overload_tblname[PF_TABLE_NAME_SIZE]; 508 509 TAILQ_ENTRY(pf_rule) entries; 510 struct pf_pool nat; 511 struct pf_pool rdr; 512 struct pf_pool route; 513 struct pf_threshold pktrate; 514 515 u_int64_t evaluations; 516 u_int64_t packets[2]; 517 u_int64_t bytes[2]; 518 519 struct pfi_kif *kif; 520 struct pfi_kif *rcv_kif; 521 struct pf_anchor *anchor; 522 struct pfr_ktable *overload_tbl; 523 524 pf_osfp_t os_fingerprint; 525 526 int rtableid; 527 int onrdomain; 528 u_int32_t timeout[PFTM_MAX]; 529 u_int32_t states_cur; 530 u_int32_t states_tot; 531 u_int32_t max_states; 532 u_int32_t src_nodes; 533 u_int32_t max_src_nodes; 534 u_int32_t max_src_states; 535 u_int32_t max_src_conn; 536 struct { 537 u_int32_t limit; 538 u_int32_t seconds; 539 } max_src_conn_rate; 540 u_int32_t qid; 541 u_int32_t pqid; 542 u_int32_t rt_listid; 543 u_int32_t nr; 544 u_int32_t prob; 545 uid_t cuid; 546 pid_t cpid; 547 548 u_int16_t return_icmp; 549 u_int16_t return_icmp6; 550 u_int16_t max_mss; 551 u_int16_t tag; 552 u_int16_t match_tag; 553 u_int16_t scrub_flags; 554 u_int16_t delay; 555 556 struct pf_rule_uid uid; 557 struct pf_rule_gid gid; 558 559 u_int32_t rule_flag; 560 u_int8_t action; 561 u_int8_t direction; 562 u_int8_t log; 563 u_int8_t logif; 564 u_int8_t quick; 565 u_int8_t ifnot; 566 u_int8_t match_tag_not; 567 568 #define PF_STATE_NORMAL 0x1 569 #define PF_STATE_MODULATE 0x2 570 #define PF_STATE_SYNPROXY 0x3 571 u_int8_t keep_state; 572 sa_family_t af; 573 u_int8_t proto; 574 u_int16_t type; /* aux. value 256 is legit */ 575 u_int16_t code; /* aux. value 256 is legit */ 576 u_int8_t flags; 577 u_int8_t flagset; 578 u_int8_t min_ttl; 579 u_int8_t allow_opts; 580 u_int8_t rt; 581 u_int8_t return_ttl; 582 u_int8_t tos; 583 u_int8_t set_tos; 584 u_int8_t anchor_relative; 585 u_int8_t anchor_wildcard; 586 587 #define PF_FLUSH 0x01 588 #define PF_FLUSH_GLOBAL 0x02 589 u_int8_t flush; 590 u_int8_t prio; 591 u_int8_t set_prio[2]; 592 sa_family_t naf; 593 u_int8_t rcvifnot; 594 595 struct { 596 struct pf_addr addr; 597 u_int16_t port; 598 u_int8_t type; 599 } divert; 600 601 time_t exptime; 602 }; 603 604 /* rule flags */ 605 #define PFRULE_DROP 0x0000 606 #define PFRULE_RETURNRST 0x0001 607 #define PFRULE_FRAGMENT 0x0002 608 #define PFRULE_RETURNICMP 0x0004 609 #define PFRULE_RETURN 0x0008 610 #define PFRULE_NOSYNC 0x0010 611 #define PFRULE_SRCTRACK 0x0020 /* track source states */ 612 #define PFRULE_RULESRCTRACK 0x0040 /* per rule */ 613 #define PFRULE_SETDELAY 0x0080 614 615 /* rule flags again */ 616 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 617 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 618 #define PFRULE_PFLOW 0x00040000 619 #define PFRULE_ONCE 0x00100000 /* one shot rule */ 620 #define PFRULE_AFTO 0x00200000 /* af-to rule */ 621 #define PFRULE_EXPIRED 0x00400000 /* one shot rule hit by pkt */ 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 #define PF_PKTDELAY_MAXPKTS 10000 /* max # of pkts held in delay queue */ 627 628 struct pf_rule_item { 629 SLIST_ENTRY(pf_rule_item) entry; 630 struct pf_rule *r; 631 }; 632 633 SLIST_HEAD(pf_rule_slist, pf_rule_item); 634 635 enum pf_sn_types { PF_SN_NONE, PF_SN_NAT, PF_SN_RDR, PF_SN_ROUTE, PF_SN_MAX }; 636 637 struct pf_src_node { 638 RB_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 int32_t creation; 649 int32_t expire; 650 sa_family_t af; 651 sa_family_t naf; 652 u_int8_t type; 653 }; 654 655 struct pf_sn_item { 656 SLIST_ENTRY(pf_sn_item) next; 657 struct pf_src_node *sn; 658 }; 659 660 SLIST_HEAD(pf_sn_head, pf_sn_item); 661 662 #define PFSNODE_HIWAT 10000 /* default source node table size */ 663 664 struct pf_state_scrub { 665 struct timeval pfss_last; /* time received last packet */ 666 u_int32_t pfss_tsecr; /* last echoed timestamp */ 667 u_int32_t pfss_tsval; /* largest timestamp */ 668 u_int32_t pfss_tsval0; /* original timestamp */ 669 u_int16_t pfss_flags; 670 #define PFSS_TIMESTAMP 0x0001 /* modulate timestamp */ 671 #define PFSS_PAWS 0x0010 /* stricter PAWS checks */ 672 #define PFSS_PAWS_IDLED 0x0020 /* was idle too long. no PAWS */ 673 #define PFSS_DATA_TS 0x0040 /* timestamp on data packets */ 674 #define PFSS_DATA_NOTS 0x0080 /* no timestamp on data packets */ 675 u_int8_t pfss_ttl; /* stashed TTL */ 676 u_int8_t pad; 677 u_int32_t pfss_ts_mod; /* timestamp modulation */ 678 }; 679 680 struct pf_state_host { 681 struct pf_addr addr; 682 u_int16_t port; 683 u_int16_t pad; 684 }; 685 686 struct pf_state_peer { 687 struct pf_state_scrub *scrub; /* state is scrubbed */ 688 u_int32_t seqlo; /* Max sequence number sent */ 689 u_int32_t seqhi; /* Max the other end ACKd + win */ 690 u_int32_t seqdiff; /* Sequence number modulator */ 691 u_int16_t max_win; /* largest window (pre scaling) */ 692 u_int16_t mss; /* Maximum segment size option */ 693 u_int8_t state; /* active state level */ 694 u_int8_t wscale; /* window scaling factor */ 695 u_int8_t tcp_est; /* Did we reach TCPS_ESTABLISHED */ 696 u_int8_t pad[1]; 697 }; 698 699 TAILQ_HEAD(pf_state_queue, pf_state); 700 701 /* keep synced with struct pf_state_key, used in RB_FIND */ 702 struct pf_state_key_cmp { 703 struct pf_addr addr[2]; 704 u_int16_t port[2]; 705 u_int16_t rdomain; 706 u_int16_t hash; 707 sa_family_t af; 708 u_int8_t proto; 709 }; 710 711 /* keep synced with struct pf_state, used in RB_FIND */ 712 struct pf_state_cmp { 713 u_int64_t id; 714 u_int32_t creatorid; 715 u_int8_t direction; 716 u_int8_t pad[3]; 717 }; 718 719 /* struct pf_state.state_flags */ 720 #define PFSTATE_ALLOWOPTS 0x0001 721 #define PFSTATE_SLOPPY 0x0002 722 #define PFSTATE_PFLOW 0x0004 723 #define PFSTATE_NOSYNC 0x0008 724 #define PFSTATE_ACK 0x0010 725 #define PFSTATE_NODF 0x0020 726 #define PFSTATE_SETTOS 0x0040 727 #define PFSTATE_RANDOMID 0x0080 728 #define PFSTATE_SCRUB_TCP 0x0100 729 #define PFSTATE_SETPRIO 0x0200 730 #define PFSTATE_INP_UNLINKED 0x0400 731 #define PFSTATE_SCRUBMASK (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SCRUB_TCP) 732 #define PFSTATE_SETMASK (PFSTATE_SETTOS|PFSTATE_SETPRIO) 733 734 /* 735 * Unified state structures for pulling states out of the kernel 736 * used by pfsync(4) and the pf(4) ioctl. 737 */ 738 struct pfsync_state_scrub { 739 u_int16_t pfss_flags; 740 u_int8_t pfss_ttl; /* stashed TTL */ 741 #define PFSYNC_SCRUB_FLAG_VALID 0x01 742 u_int8_t scrub_flag; 743 u_int32_t pfss_ts_mod; /* timestamp modulation */ 744 } __packed; 745 746 struct pfsync_state_peer { 747 struct pfsync_state_scrub scrub; /* state is scrubbed */ 748 u_int32_t seqlo; /* Max sequence number sent */ 749 u_int32_t seqhi; /* Max the other end ACKd + win */ 750 u_int32_t seqdiff; /* Sequence number modulator */ 751 u_int16_t max_win; /* largest window (pre scaling) */ 752 u_int16_t mss; /* Maximum segment size option */ 753 u_int8_t state; /* active state level */ 754 u_int8_t wscale; /* window scaling factor */ 755 u_int8_t pad[6]; 756 } __packed; 757 758 struct pfsync_state_key { 759 struct pf_addr addr[2]; 760 u_int16_t port[2]; 761 u_int16_t rdomain; 762 sa_family_t af; 763 u_int8_t pad; 764 }; 765 766 struct pfsync_state { 767 u_int64_t id; 768 char ifname[IFNAMSIZ]; 769 struct pfsync_state_key key[2]; 770 struct pfsync_state_peer src; 771 struct pfsync_state_peer dst; 772 struct pf_addr rt_addr; 773 u_int32_t rule; 774 u_int32_t anchor; 775 u_int32_t nat_rule; 776 u_int32_t creation; 777 u_int32_t expire; 778 u_int32_t packets[2][2]; 779 u_int32_t bytes[2][2]; 780 u_int32_t creatorid; 781 int32_t rtableid[2]; 782 u_int16_t max_mss; 783 sa_family_t af; 784 u_int8_t proto; 785 u_int8_t direction; 786 u_int8_t log; 787 u_int8_t rt; 788 u_int8_t timeout; 789 u_int8_t sync_flags; 790 u_int8_t updates; 791 u_int8_t min_ttl; 792 u_int8_t set_tos; 793 u_int16_t state_flags; 794 u_int8_t set_prio[2]; 795 } __packed; 796 797 #define PFSYNC_FLAG_SRCNODE 0x04 798 #define PFSYNC_FLAG_NATSRCNODE 0x08 799 800 #define pf_state_counter_hton(s,d) do { \ 801 d[0] = htonl((s>>32)&0xffffffff); \ 802 d[1] = htonl(s&0xffffffff); \ 803 } while (0) 804 805 #define pf_state_counter_from_pfsync(s) \ 806 (((u_int64_t)(s[0])<<32) | (u_int64_t)(s[1])) 807 808 #define pf_state_counter_ntoh(s,d) do { \ 809 d = ntohl(s[0]); \ 810 d = d<<32; \ 811 d += ntohl(s[1]); \ 812 } while (0) 813 814 TAILQ_HEAD(pf_rulequeue, pf_rule); 815 816 struct pf_anchor; 817 818 struct pf_ruleset { 819 struct { 820 struct pf_rulequeue queues[2]; 821 struct { 822 struct pf_rulequeue *ptr; 823 u_int32_t rcount; 824 u_int32_t version; 825 int open; 826 } active, inactive; 827 } rules; 828 struct pf_anchor *anchor; 829 u_int32_t tticket; 830 int tables; 831 int topen; 832 }; 833 834 RB_HEAD(pf_anchor_global, pf_anchor); 835 RB_HEAD(pf_anchor_node, pf_anchor); 836 struct pf_anchor { 837 RB_ENTRY(pf_anchor) entry_global; 838 RB_ENTRY(pf_anchor) entry_node; 839 struct pf_anchor *parent; 840 struct pf_anchor_node children; 841 char name[PF_ANCHOR_NAME_SIZE]; 842 char path[PATH_MAX]; 843 struct pf_ruleset ruleset; 844 int refcnt; /* anchor rules */ 845 int match; 846 struct refcnt ref; /* for transactions */ 847 }; 848 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare) 849 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare) 850 851 #define PF_RESERVED_ANCHOR "_pf" 852 853 #define PFR_TFLAG_PERSIST 0x00000001 854 #define PFR_TFLAG_CONST 0x00000002 855 #define PFR_TFLAG_ACTIVE 0x00000004 856 #define PFR_TFLAG_INACTIVE 0x00000008 857 #define PFR_TFLAG_REFERENCED 0x00000010 858 #define PFR_TFLAG_REFDANCHOR 0x00000020 859 #define PFR_TFLAG_COUNTERS 0x00000040 860 /* Adjust masks below when adding flags. */ 861 #define PFR_TFLAG_USRMASK 0x00000043 862 #define PFR_TFLAG_SETMASK 0x0000003C 863 #define PFR_TFLAG_ALLMASK 0x0000007F 864 865 struct pfr_table { 866 char pfrt_anchor[PATH_MAX]; 867 char pfrt_name[PF_TABLE_NAME_SIZE]; 868 u_int32_t pfrt_flags; 869 u_int8_t pfrt_fback; 870 }; 871 872 enum { PFR_FB_NONE, PFR_FB_MATCH, PFR_FB_ADDED, PFR_FB_DELETED, 873 PFR_FB_CHANGED, PFR_FB_CLEARED, PFR_FB_DUPLICATE, 874 PFR_FB_NOTMATCH, PFR_FB_CONFLICT, PFR_FB_NOCOUNT, PFR_FB_MAX }; 875 876 struct pfr_addr { 877 union { 878 struct in_addr _pfra_ip4addr; 879 struct in6_addr _pfra_ip6addr; 880 } pfra_u; 881 char pfra_ifname[IFNAMSIZ]; 882 u_int32_t pfra_states; 883 u_int16_t pfra_weight; 884 u_int8_t pfra_af; 885 u_int8_t pfra_net; 886 u_int8_t pfra_not; 887 u_int8_t pfra_fback; 888 u_int8_t pfra_type; 889 u_int8_t pad[7]; 890 }; 891 #define pfra_ip4addr pfra_u._pfra_ip4addr 892 #define pfra_ip6addr pfra_u._pfra_ip6addr 893 894 enum { PFR_DIR_IN, PFR_DIR_OUT, PFR_DIR_MAX }; 895 enum { PFR_OP_BLOCK, PFR_OP_MATCH, PFR_OP_PASS, PFR_OP_ADDR_MAX, 896 PFR_OP_TABLE_MAX }; 897 #define PFR_OP_XPASS PFR_OP_ADDR_MAX 898 899 struct pfr_astats { 900 struct pfr_addr pfras_a; 901 u_int64_t pfras_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 902 u_int64_t pfras_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 903 time_t pfras_tzero; 904 }; 905 906 enum { PFR_REFCNT_RULE, PFR_REFCNT_ANCHOR, PFR_REFCNT_MAX }; 907 908 struct pfr_tstats { 909 struct pfr_table pfrts_t; 910 u_int64_t pfrts_packets[PFR_DIR_MAX][PFR_OP_TABLE_MAX]; 911 u_int64_t pfrts_bytes[PFR_DIR_MAX][PFR_OP_TABLE_MAX]; 912 u_int64_t pfrts_match; 913 u_int64_t pfrts_nomatch; 914 time_t pfrts_tzero; 915 int pfrts_cnt; 916 int pfrts_refcnt[PFR_REFCNT_MAX]; 917 }; 918 #define pfrts_name pfrts_t.pfrt_name 919 #define pfrts_flags pfrts_t.pfrt_flags 920 921 struct pfr_kcounters { 922 u_int64_t pfrkc_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 923 u_int64_t pfrkc_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 924 u_int64_t states; 925 }; 926 927 /* 928 * XXX ip_ipsp.h's sockaddr_union should be converted to sockaddr * 929 * passing with correct sa_len, then a good approach for cleaning this 930 * will become more clear. 931 */ 932 union pfsockaddr_union { 933 struct sockaddr sa; 934 struct sockaddr_in sin; 935 struct sockaddr_in6 sin6; 936 }; 937 938 SLIST_HEAD(pfr_kentryworkq, pfr_kentry); 939 struct _pfr_kentry { 940 struct radix_node _pfrke_node[2]; 941 union pfsockaddr_union _pfrke_sa; 942 SLIST_ENTRY(pfr_kentry) _pfrke_workq; 943 SLIST_ENTRY(pfr_kentry) _pfrke_ioq; 944 struct pfr_kcounters *_pfrke_counters; 945 time_t _pfrke_tzero; 946 u_int8_t _pfrke_af; 947 u_int8_t _pfrke_net; 948 u_int8_t _pfrke_flags; 949 u_int8_t _pfrke_type; 950 u_int8_t _pfrke_fb; 951 }; 952 #define PFRKE_FLAG_NOT 0x01 953 #define PFRKE_FLAG_MARK 0x02 954 955 /* pfrke_type */ 956 enum { PFRKE_PLAIN, PFRKE_ROUTE, PFRKE_COST, PFRKE_MAX }; 957 958 struct pfr_kentry { 959 union { 960 struct _pfr_kentry _ke; 961 } u; 962 }; 963 #define pfrke_node u._ke._pfrke_node 964 #define pfrke_sa u._ke._pfrke_sa 965 #define pfrke_workq u._ke._pfrke_workq 966 #define pfrke_ioq u._ke._pfrke_ioq 967 #define pfrke_counters u._ke._pfrke_counters 968 #define pfrke_tzero u._ke._pfrke_tzero 969 #define pfrke_af u._ke._pfrke_af 970 #define pfrke_net u._ke._pfrke_net 971 #define pfrke_flags u._ke._pfrke_flags 972 #define pfrke_type u._ke._pfrke_type 973 #define pfrke_fb u._ke._pfrke_fb 974 975 struct pfr_kentry_route { 976 union { 977 struct _pfr_kentry _ke; 978 } u; 979 980 struct pfi_kif *kif; 981 char ifname[IFNAMSIZ]; 982 }; 983 984 struct pfr_kentry_cost { 985 union { 986 struct _pfr_kentry _ke; 987 } u; 988 989 struct pfi_kif *kif; 990 char ifname[IFNAMSIZ]; 991 /* Above overlaps with pfr_kentry route */ 992 993 u_int16_t weight; 994 }; 995 996 struct pfr_kentry_all { 997 union { 998 struct _pfr_kentry _ke; 999 struct pfr_kentry_route kr; 1000 struct pfr_kentry_cost kc; 1001 } u; 1002 }; 1003 #define pfrke_rkif u.kr.kif 1004 #define pfrke_rifname u.kr.ifname 1005 1006 SLIST_HEAD(pfr_ktableworkq, pfr_ktable); 1007 RB_HEAD(pfr_ktablehead, pfr_ktable); 1008 struct pfr_ktable { 1009 struct pfr_tstats pfrkt_ts; 1010 RB_ENTRY(pfr_ktable) pfrkt_tree; 1011 SLIST_ENTRY(pfr_ktable) pfrkt_workq; 1012 struct radix_node_head *pfrkt_ip4; 1013 struct radix_node_head *pfrkt_ip6; 1014 struct pfr_ktable *pfrkt_shadow; 1015 struct pfr_ktable *pfrkt_root; 1016 struct pf_ruleset *pfrkt_rs; 1017 long pfrkt_larg; 1018 int pfrkt_nflags; 1019 u_int64_t pfrkt_refcntcost; 1020 u_int16_t pfrkt_gcdweight; 1021 u_int16_t pfrkt_maxweight; 1022 }; 1023 #define pfrkt_t pfrkt_ts.pfrts_t 1024 #define pfrkt_name pfrkt_t.pfrt_name 1025 #define pfrkt_anchor pfrkt_t.pfrt_anchor 1026 #define pfrkt_ruleset pfrkt_t.pfrt_ruleset 1027 #define pfrkt_flags pfrkt_t.pfrt_flags 1028 #define pfrkt_cnt pfrkt_ts.pfrts_cnt 1029 #define pfrkt_refcnt pfrkt_ts.pfrts_refcnt 1030 #define pfrkt_packets pfrkt_ts.pfrts_packets 1031 #define pfrkt_bytes pfrkt_ts.pfrts_bytes 1032 #define pfrkt_match pfrkt_ts.pfrts_match 1033 #define pfrkt_nomatch pfrkt_ts.pfrts_nomatch 1034 #define pfrkt_tzero pfrkt_ts.pfrts_tzero 1035 1036 RB_HEAD(pfi_ifhead, pfi_kif); 1037 1038 /* state tables */ 1039 extern struct pf_state_tree pf_statetbl; 1040 1041 /* keep synced with pfi_kif, used in RB_FIND */ 1042 struct pfi_kif_cmp { 1043 char pfik_name[IFNAMSIZ]; 1044 }; 1045 1046 struct ifnet; 1047 struct ifg_group; 1048 1049 struct pfi_kif { 1050 char pfik_name[IFNAMSIZ]; 1051 RB_ENTRY(pfi_kif) pfik_tree; 1052 u_int64_t pfik_packets[2][2][2]; 1053 u_int64_t pfik_bytes[2][2][2]; 1054 time_t pfik_tzero; 1055 int pfik_flags; 1056 int pfik_flags_new; 1057 void *pfik_ah_cookie; 1058 struct ifnet *pfik_ifp; 1059 struct ifg_group *pfik_group; 1060 int pfik_states; 1061 int pfik_rules; 1062 int pfik_routes; 1063 int pfik_srcnodes; 1064 int pfik_flagrefs; 1065 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 1066 }; 1067 1068 enum pfi_kif_refs { 1069 PFI_KIF_REF_NONE, 1070 PFI_KIF_REF_STATE, 1071 PFI_KIF_REF_RULE, 1072 PFI_KIF_REF_ROUTE, 1073 PFI_KIF_REF_SRCNODE, 1074 PFI_KIF_REF_FLAG 1075 }; 1076 1077 #define PFI_IFLAG_SKIP 0x0100 /* skip filtering on interface */ 1078 #define PFI_IFLAG_ANY 0x0200 /* match any non-loopback interface */ 1079 1080 /* flags for RDR options */ 1081 #define PF_DPORT_RANGE 0x01 /* Dest port uses range */ 1082 #define PF_RPORT_RANGE 0x02 /* RDR'ed port uses range */ 1083 1084 /* Reasons code for passing/dropping a packet */ 1085 #define PFRES_MATCH 0 /* Explicit match of a rule */ 1086 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 1087 #define PFRES_FRAG 2 /* Dropping following fragment */ 1088 #define PFRES_SHORT 3 /* Dropping short packet */ 1089 #define PFRES_NORM 4 /* Dropping by normalizer */ 1090 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 1091 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 1092 #define PFRES_CONGEST 7 /* Congestion */ 1093 #define PFRES_IPOPTIONS 8 /* IP option */ 1094 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 1095 #define PFRES_BADSTATE 10 /* State mismatch */ 1096 #define PFRES_STATEINS 11 /* State insertion failure */ 1097 #define PFRES_MAXSTATES 12 /* State limit */ 1098 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 1099 #define PFRES_SYNPROXY 14 /* SYN proxy */ 1100 #define PFRES_TRANSLATE 15 /* No translation address available */ 1101 #define PFRES_NOROUTE 16 /* No route found for PBR action */ 1102 #define PFRES_MAX 17 /* total+1 */ 1103 1104 #define PFRES_NAMES { \ 1105 "match", \ 1106 "bad-offset", \ 1107 "fragment", \ 1108 "short", \ 1109 "normalize", \ 1110 "memory", \ 1111 "bad-timestamp", \ 1112 "congestion", \ 1113 "ip-option", \ 1114 "proto-cksum", \ 1115 "state-mismatch", \ 1116 "state-insert", \ 1117 "state-limit", \ 1118 "src-limit", \ 1119 "synproxy", \ 1120 "translate", \ 1121 "no-route", \ 1122 NULL \ 1123 } 1124 1125 /* Counters for other things we want to keep track of */ 1126 #define LCNT_STATES 0 /* states */ 1127 #define LCNT_SRCSTATES 1 /* max-src-states */ 1128 #define LCNT_SRCNODES 2 /* max-src-nodes */ 1129 #define LCNT_SRCCONN 3 /* max-src-conn */ 1130 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 1131 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 1132 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 1133 #define LCNT_SYNFLOODS 7 /* synfloods detected */ 1134 #define LCNT_SYNCOOKIES_SENT 8 /* syncookies sent */ 1135 #define LCNT_SYNCOOKIES_VALID 9 /* syncookies validated */ 1136 #define LCNT_MAX 10 /* total+1 */ 1137 1138 #define LCNT_NAMES { \ 1139 "max states per rule", \ 1140 "max-src-states", \ 1141 "max-src-nodes", \ 1142 "max-src-conn", \ 1143 "max-src-conn-rate", \ 1144 "overload table insertion", \ 1145 "overload flush states", \ 1146 "synfloods detected", \ 1147 "syncookies sent", \ 1148 "syncookies validated", \ 1149 NULL \ 1150 } 1151 1152 /* UDP state enumeration */ 1153 #define PFUDPS_NO_TRAFFIC 0 1154 #define PFUDPS_SINGLE 1 1155 #define PFUDPS_MULTIPLE 2 1156 1157 #define PFUDPS_NSTATES 3 /* number of state levels */ 1158 1159 #define PFUDPS_NAMES { \ 1160 "NO_TRAFFIC", \ 1161 "SINGLE", \ 1162 "MULTIPLE", \ 1163 NULL \ 1164 } 1165 1166 /* Other protocol state enumeration */ 1167 #define PFOTHERS_NO_TRAFFIC 0 1168 #define PFOTHERS_SINGLE 1 1169 #define PFOTHERS_MULTIPLE 2 1170 1171 #define PFOTHERS_NSTATES 3 /* number of state levels */ 1172 1173 #define PFOTHERS_NAMES { \ 1174 "NO_TRAFFIC", \ 1175 "SINGLE", \ 1176 "MULTIPLE", \ 1177 NULL \ 1178 } 1179 1180 #define FCNT_STATE_SEARCH 0 1181 #define FCNT_STATE_INSERT 1 1182 #define FCNT_STATE_REMOVALS 2 1183 #define FCNT_MAX 3 1184 1185 #define SCNT_SRC_NODE_SEARCH 0 1186 #define SCNT_SRC_NODE_INSERT 1 1187 #define SCNT_SRC_NODE_REMOVALS 2 1188 #define SCNT_MAX 3 1189 1190 #define NCNT_FRAG_SEARCH 0 1191 #define NCNT_FRAG_INSERT 1 1192 #define NCNT_FRAG_REMOVALS 2 1193 #define NCNT_MAX 3 1194 1195 #define REASON_SET(a, x) \ 1196 do { \ 1197 if ((void *)(a) != NULL) { \ 1198 *(a) = (x); \ 1199 if (x < PFRES_MAX) \ 1200 pf_status.counters[x]++; \ 1201 } \ 1202 } while (0) 1203 1204 struct pf_status { 1205 u_int64_t counters[PFRES_MAX]; 1206 u_int64_t lcounters[LCNT_MAX]; /* limit counters */ 1207 u_int64_t fcounters[FCNT_MAX]; 1208 u_int64_t scounters[SCNT_MAX]; 1209 u_int64_t ncounters[NCNT_MAX]; 1210 u_int64_t pcounters[2][2][3]; 1211 u_int64_t bcounters[2][2]; 1212 u_int64_t stateid; 1213 u_int64_t syncookies_inflight[2]; /* unACKed SYNcookies */ 1214 time_t since; 1215 u_int32_t running; 1216 u_int32_t states; 1217 u_int32_t states_halfopen; 1218 u_int32_t src_nodes; 1219 u_int32_t fragments; 1220 u_int32_t debug; 1221 u_int32_t hostid; 1222 u_int32_t reass; /* reassembly */ 1223 u_int8_t syncookies_active; 1224 u_int8_t syncookies_mode; /* never/always/adaptive */ 1225 u_int8_t pad[2]; 1226 char ifname[IFNAMSIZ]; 1227 u_int8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 1228 }; 1229 1230 #define PF_REASS_ENABLED 0x01 1231 #define PF_REASS_NODF 0x02 1232 1233 #define PF_SYNCOOKIES_NEVER 0 1234 #define PF_SYNCOOKIES_ALWAYS 1 1235 #define PF_SYNCOOKIES_ADAPTIVE 2 1236 #define PF_SYNCOOKIES_MODE_MAX PF_SYNCOOKIES_ADAPTIVE 1237 1238 #define PF_SYNCOOKIES_HIWATPCT 25 1239 #define PF_SYNCOOKIES_LOWATPCT PF_SYNCOOKIES_HIWATPCT/2 1240 1241 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 1242 1243 struct pf_queue_bwspec { 1244 u_int absolute; 1245 u_int percent; 1246 }; 1247 1248 struct pf_queue_scspec { 1249 struct pf_queue_bwspec m1; 1250 struct pf_queue_bwspec m2; 1251 u_int d; 1252 }; 1253 1254 struct pf_queue_fqspec { 1255 u_int flows; 1256 u_int quantum; 1257 u_int target; 1258 u_int interval; 1259 }; 1260 1261 struct pf_queuespec { 1262 TAILQ_ENTRY(pf_queuespec) entries; 1263 char qname[PF_QNAME_SIZE]; 1264 char parent[PF_QNAME_SIZE]; 1265 char ifname[IFNAMSIZ]; 1266 struct pf_queue_scspec realtime; 1267 struct pf_queue_scspec linkshare; 1268 struct pf_queue_scspec upperlimit; 1269 struct pf_queue_fqspec flowqueue; 1270 struct pfi_kif *kif; 1271 u_int flags; 1272 u_int qlimit; 1273 u_int32_t qid; 1274 u_int32_t parent_qid; 1275 }; 1276 1277 #define PFQS_FLOWQUEUE 0x0001 1278 #define PFQS_ROOTCLASS 0x0002 1279 #define PFQS_DEFAULT 0x1000 /* maps to HFSC_DEFAULTCLASS */ 1280 1281 struct priq_opts { 1282 int flags; 1283 }; 1284 1285 struct hfsc_opts { 1286 /* real-time service curve */ 1287 u_int rtsc_m1; /* slope of the 1st segment in bps */ 1288 u_int rtsc_d; /* the x-projection of m1 in msec */ 1289 u_int rtsc_m2; /* slope of the 2nd segment in bps */ 1290 /* link-sharing service curve */ 1291 u_int lssc_m1; 1292 u_int lssc_d; 1293 u_int lssc_m2; 1294 /* upper-limit service curve */ 1295 u_int ulsc_m1; 1296 u_int ulsc_d; 1297 u_int ulsc_m2; 1298 int flags; 1299 }; 1300 1301 struct pfq_ops { 1302 void * (*pfq_alloc)(struct ifnet *); 1303 int (*pfq_addqueue)(void *, struct pf_queuespec *); 1304 void (*pfq_free)(void *); 1305 int (*pfq_qstats)(struct pf_queuespec *, void *, int *); 1306 /* Queue manager ops */ 1307 unsigned int (*pfq_qlength)(void *); 1308 struct mbuf * (*pfq_enqueue)(void *, struct mbuf *); 1309 struct mbuf * (*pfq_deq_begin)(void *, void **, struct mbuf_list *); 1310 void (*pfq_deq_commit)(void *, struct mbuf *, void *); 1311 void (*pfq_purge)(void *, struct mbuf_list *); 1312 }; 1313 1314 struct pf_tagname { 1315 TAILQ_ENTRY(pf_tagname) entries; 1316 char name[PF_TAG_NAME_SIZE]; 1317 u_int16_t tag; 1318 int ref; 1319 }; 1320 1321 struct pf_divert { 1322 struct pf_addr addr; 1323 u_int16_t port; 1324 u_int16_t rdomain; 1325 u_int8_t type; 1326 }; 1327 1328 enum pf_divert_types { 1329 PF_DIVERT_NONE, 1330 PF_DIVERT_TO, 1331 PF_DIVERT_REPLY, 1332 PF_DIVERT_PACKET 1333 }; 1334 1335 struct pf_pktdelay { 1336 struct timeout to; 1337 struct mbuf *m; 1338 u_int ifidx; 1339 }; 1340 1341 /* Fragment entries reference mbuf clusters, so base the default on that. */ 1342 #define PFFRAG_FRENT_HIWAT (NMBCLUSTERS / 16) /* Number of entries */ 1343 #define PFFRAG_FRAG_HIWAT (NMBCLUSTERS / 32) /* Number of packets */ 1344 1345 #define PFR_KTABLE_HIWAT 1000 /* Number of tables */ 1346 #define PFR_KENTRY_HIWAT 200000 /* Number of table entries */ 1347 #define PFR_KENTRY_HIWAT_SMALL 100000 /* Number of entries for tiny hosts */ 1348 1349 /* 1350 * ioctl parameter structures 1351 */ 1352 1353 struct pfioc_rule { 1354 u_int32_t action; 1355 u_int32_t ticket; 1356 u_int32_t nr; 1357 char anchor[PATH_MAX]; 1358 char anchor_call[PATH_MAX]; 1359 struct pf_rule rule; 1360 }; 1361 1362 struct pfioc_natlook { 1363 struct pf_addr saddr; 1364 struct pf_addr daddr; 1365 struct pf_addr rsaddr; 1366 struct pf_addr rdaddr; 1367 u_int16_t rdomain; 1368 u_int16_t rrdomain; 1369 u_int16_t sport; 1370 u_int16_t dport; 1371 u_int16_t rsport; 1372 u_int16_t rdport; 1373 sa_family_t af; 1374 u_int8_t proto; 1375 u_int8_t direction; 1376 }; 1377 1378 struct pfioc_state { 1379 struct pfsync_state state; 1380 }; 1381 1382 struct pfioc_src_node_kill { 1383 sa_family_t psnk_af; 1384 struct pf_rule_addr psnk_src; 1385 struct pf_rule_addr psnk_dst; 1386 u_int psnk_killed; 1387 }; 1388 1389 struct pfioc_state_kill { 1390 struct pf_state_cmp psk_pfcmp; 1391 sa_family_t psk_af; 1392 int psk_proto; 1393 struct pf_rule_addr psk_src; 1394 struct pf_rule_addr psk_dst; 1395 char psk_ifname[IFNAMSIZ]; 1396 char psk_label[PF_RULE_LABEL_SIZE]; 1397 u_int psk_killed; 1398 u_int16_t psk_rdomain; 1399 }; 1400 1401 struct pfioc_states { 1402 size_t ps_len; 1403 union { 1404 caddr_t psu_buf; 1405 struct pfsync_state *psu_states; 1406 } ps_u; 1407 #define ps_buf ps_u.psu_buf 1408 #define ps_states ps_u.psu_states 1409 }; 1410 1411 struct pfioc_src_nodes { 1412 size_t psn_len; 1413 union { 1414 caddr_t psu_buf; 1415 struct pf_src_node *psu_src_nodes; 1416 } psn_u; 1417 #define psn_buf psn_u.psu_buf 1418 #define psn_src_nodes psn_u.psu_src_nodes 1419 }; 1420 1421 struct pfioc_tm { 1422 int timeout; 1423 int seconds; 1424 }; 1425 1426 struct pfioc_limit { 1427 int index; 1428 unsigned limit; 1429 }; 1430 1431 struct pfioc_ruleset { 1432 u_int32_t nr; 1433 char path[PATH_MAX]; 1434 char name[PF_ANCHOR_NAME_SIZE]; 1435 }; 1436 1437 struct pfioc_trans { 1438 int size; /* number of elements */ 1439 int esize; /* size of each element in bytes */ 1440 struct pfioc_trans_e { 1441 int type; 1442 char anchor[PATH_MAX]; 1443 u_int32_t ticket; 1444 } *array; 1445 }; 1446 1447 struct pfioc_queue { 1448 u_int32_t ticket; 1449 u_int nr; 1450 struct pf_queuespec queue; 1451 }; 1452 1453 struct pfioc_qstats { 1454 u_int32_t ticket; 1455 u_int32_t nr; 1456 struct pf_queuespec queue; 1457 void *buf; 1458 int nbytes; 1459 }; 1460 1461 #define PFR_FLAG_DUMMY 0x00000002 1462 #define PFR_FLAG_FEEDBACK 0x00000004 1463 #define PFR_FLAG_CLSTATS 0x00000008 1464 #define PFR_FLAG_ADDRSTOO 0x00000010 1465 #define PFR_FLAG_REPLACE 0x00000020 1466 #define PFR_FLAG_ALLRSETS 0x00000040 1467 #define PFR_FLAG_ALLMASK 0x0000007F 1468 #ifdef _KERNEL 1469 #define PFR_FLAG_USERIOCTL 0x10000000 1470 #endif 1471 1472 struct pfioc_table { 1473 struct pfr_table pfrio_table; 1474 void *pfrio_buffer; 1475 int pfrio_esize; 1476 int pfrio_size; 1477 int pfrio_size2; 1478 int pfrio_nadd; 1479 int pfrio_ndel; 1480 int pfrio_nchange; 1481 int pfrio_flags; 1482 u_int32_t pfrio_ticket; 1483 }; 1484 #define pfrio_exists pfrio_nadd 1485 #define pfrio_nzero pfrio_nadd 1486 #define pfrio_nmatch pfrio_nadd 1487 #define pfrio_naddr pfrio_size2 1488 #define pfrio_setflag pfrio_size2 1489 #define pfrio_clrflag pfrio_nadd 1490 1491 struct pfioc_iface { 1492 char pfiio_name[IFNAMSIZ]; 1493 void *pfiio_buffer; 1494 int pfiio_esize; 1495 int pfiio_size; 1496 int pfiio_nzero; 1497 int pfiio_flags; 1498 }; 1499 1500 struct pfioc_synflwats { 1501 u_int32_t hiwat; 1502 u_int32_t lowat; 1503 }; 1504 1505 /* 1506 * ioctl operations 1507 */ 1508 1509 #define DIOCSTART _IO ('D', 1) 1510 #define DIOCSTOP _IO ('D', 2) 1511 #define DIOCADDRULE _IOWR('D', 4, struct pfioc_rule) 1512 #define DIOCGETRULES _IOWR('D', 6, struct pfioc_rule) 1513 #define DIOCGETRULE _IOWR('D', 7, struct pfioc_rule) 1514 /* cut 8 - 17 */ 1515 #define DIOCCLRSTATES _IOWR('D', 18, struct pfioc_state_kill) 1516 #define DIOCGETSTATE _IOWR('D', 19, struct pfioc_state) 1517 #define DIOCSETSTATUSIF _IOWR('D', 20, struct pfioc_iface) 1518 #define DIOCGETSTATUS _IOWR('D', 21, struct pf_status) 1519 #define DIOCCLRSTATUS _IOWR('D', 22, struct pfioc_iface) 1520 #define DIOCNATLOOK _IOWR('D', 23, struct pfioc_natlook) 1521 #define DIOCSETDEBUG _IOWR('D', 24, u_int32_t) 1522 #define DIOCGETSTATES _IOWR('D', 25, struct pfioc_states) 1523 #define DIOCCHANGERULE _IOWR('D', 26, struct pfioc_rule) 1524 /* cut 27 - 28 */ 1525 #define DIOCSETTIMEOUT _IOWR('D', 29, struct pfioc_tm) 1526 #define DIOCGETTIMEOUT _IOWR('D', 30, struct pfioc_tm) 1527 #define DIOCADDSTATE _IOWR('D', 37, struct pfioc_state) 1528 /* cut 38 */ 1529 #define DIOCGETLIMIT _IOWR('D', 39, struct pfioc_limit) 1530 #define DIOCSETLIMIT _IOWR('D', 40, struct pfioc_limit) 1531 #define DIOCKILLSTATES _IOWR('D', 41, struct pfioc_state_kill) 1532 /* cut 42 - 57 */ 1533 #define DIOCGETRULESETS _IOWR('D', 58, struct pfioc_ruleset) 1534 #define DIOCGETRULESET _IOWR('D', 59, struct pfioc_ruleset) 1535 #define DIOCRCLRTABLES _IOWR('D', 60, struct pfioc_table) 1536 #define DIOCRADDTABLES _IOWR('D', 61, struct pfioc_table) 1537 #define DIOCRDELTABLES _IOWR('D', 62, struct pfioc_table) 1538 #define DIOCRGETTABLES _IOWR('D', 63, struct pfioc_table) 1539 #define DIOCRGETTSTATS _IOWR('D', 64, struct pfioc_table) 1540 #define DIOCRCLRTSTATS _IOWR('D', 65, struct pfioc_table) 1541 #define DIOCRCLRADDRS _IOWR('D', 66, struct pfioc_table) 1542 #define DIOCRADDADDRS _IOWR('D', 67, struct pfioc_table) 1543 #define DIOCRDELADDRS _IOWR('D', 68, struct pfioc_table) 1544 #define DIOCRSETADDRS _IOWR('D', 69, struct pfioc_table) 1545 #define DIOCRGETADDRS _IOWR('D', 70, struct pfioc_table) 1546 #define DIOCRGETASTATS _IOWR('D', 71, struct pfioc_table) 1547 #define DIOCRCLRASTATS _IOWR('D', 72, struct pfioc_table) 1548 #define DIOCRTSTADDRS _IOWR('D', 73, struct pfioc_table) 1549 #define DIOCRSETTFLAGS _IOWR('D', 74, struct pfioc_table) 1550 #define DIOCRINADEFINE _IOWR('D', 77, struct pfioc_table) 1551 #define DIOCOSFPFLUSH _IO('D', 78) 1552 #define DIOCOSFPADD _IOWR('D', 79, struct pf_osfp_ioctl) 1553 #define DIOCOSFPGET _IOWR('D', 80, struct pf_osfp_ioctl) 1554 #define DIOCXBEGIN _IOWR('D', 81, struct pfioc_trans) 1555 #define DIOCXCOMMIT _IOWR('D', 82, struct pfioc_trans) 1556 #define DIOCXROLLBACK _IOWR('D', 83, struct pfioc_trans) 1557 #define DIOCGETSRCNODES _IOWR('D', 84, struct pfioc_src_nodes) 1558 #define DIOCCLRSRCNODES _IO('D', 85) 1559 #define DIOCSETHOSTID _IOWR('D', 86, u_int32_t) 1560 #define DIOCIGETIFACES _IOWR('D', 87, struct pfioc_iface) 1561 #define DIOCSETIFFLAG _IOWR('D', 89, struct pfioc_iface) 1562 #define DIOCCLRIFFLAG _IOWR('D', 90, struct pfioc_iface) 1563 #define DIOCKILLSRCNODES _IOWR('D', 91, struct pfioc_src_node_kill) 1564 #define DIOCSETREASS _IOWR('D', 92, u_int32_t) 1565 #define DIOCADDQUEUE _IOWR('D', 93, struct pfioc_queue) 1566 #define DIOCGETQUEUES _IOWR('D', 94, struct pfioc_queue) 1567 #define DIOCGETQUEUE _IOWR('D', 95, struct pfioc_queue) 1568 #define DIOCGETQSTATS _IOWR('D', 96, struct pfioc_qstats) 1569 #define DIOCSETSYNFLWATS _IOWR('D', 97, struct pfioc_synflwats) 1570 #define DIOCSETSYNCOOKIES _IOWR('D', 98, u_int8_t) 1571 #define DIOCGETSYNFLWATS _IOWR('D', 99, struct pfioc_synflwats) 1572 #define DIOCXEND _IOWR('D', 100, u_int32_t) 1573 1574 #ifdef _KERNEL 1575 1576 struct pf_pdesc; 1577 1578 RB_HEAD(pf_src_tree, pf_src_node); 1579 RB_PROTOTYPE(pf_src_tree, pf_src_node, entry, pf_src_compare); 1580 extern struct pf_src_tree tree_src_tracking; 1581 1582 extern struct pf_state_list pf_state_list; 1583 1584 TAILQ_HEAD(pf_queuehead, pf_queuespec); 1585 extern struct pf_queuehead pf_queues[2]; 1586 extern struct pf_queuehead *pf_queues_active, *pf_queues_inactive; 1587 1588 extern struct pool pf_src_tree_pl, pf_sn_item_pl, pf_rule_pl; 1589 extern struct pool pf_state_pl, pf_state_key_pl, pf_state_item_pl, 1590 pf_rule_item_pl, pf_queue_pl, 1591 pf_pktdelay_pl, pf_anchor_pl; 1592 extern struct pool pf_state_scrub_pl; 1593 extern struct pf_rule pf_default_rule; 1594 1595 extern int pf_tbladdr_setup(struct pf_ruleset *, 1596 struct pf_addr_wrap *, int); 1597 extern void pf_tbladdr_remove(struct pf_addr_wrap *); 1598 extern void pf_tbladdr_copyout(struct pf_addr_wrap *); 1599 extern void pf_calc_skip_steps(struct pf_rulequeue *); 1600 extern void pf_purge_expired_src_nodes(void); 1601 extern void pf_remove_state(struct pf_state *); 1602 extern void pf_remove_divert_state(struct inpcb *); 1603 extern void pf_free_state(struct pf_state *); 1604 int pf_insert_src_node(struct pf_src_node **, 1605 struct pf_rule *, enum pf_sn_types, 1606 sa_family_t, struct pf_addr *, 1607 struct pf_addr *, struct pfi_kif *); 1608 void pf_remove_src_node(struct pf_src_node *); 1609 struct pf_src_node *pf_get_src_node(struct pf_state *, 1610 enum pf_sn_types); 1611 void pf_src_tree_remove_state(struct pf_state *); 1612 void pf_state_rm_src_node(struct pf_state *, 1613 struct pf_src_node *); 1614 1615 extern struct pf_state *pf_find_state_byid(struct pf_state_cmp *); 1616 extern struct pf_state *pf_find_state_all(struct pf_state_key_cmp *, 1617 u_int, int *); 1618 extern void pf_state_export(struct pfsync_state *, 1619 struct pf_state *); 1620 int pf_state_import(const struct pfsync_state *, 1621 int); 1622 int pf_state_alloc_scrub_memory( 1623 const struct pfsync_state_peer *, 1624 struct pf_state_peer *); 1625 extern void pf_print_state(struct pf_state *); 1626 extern void pf_print_flags(u_int8_t); 1627 extern void pf_addrcpy(struct pf_addr *, struct pf_addr *, 1628 sa_family_t); 1629 extern void pf_cksum_fixup(u_int16_t *, u_int16_t, 1630 u_int16_t, u_int8_t); 1631 void pf_rm_rule(struct pf_rulequeue *, 1632 struct pf_rule *); 1633 struct pf_divert *pf_find_divert(struct mbuf *); 1634 int pf_setup_pdesc(struct pf_pdesc *, sa_family_t, 1635 int, struct pfi_kif *, struct mbuf *, 1636 u_short *); 1637 1638 int pf_test(sa_family_t, int, struct ifnet *, struct mbuf **); 1639 1640 void pf_poolmask(struct pf_addr *, struct pf_addr*, 1641 struct pf_addr *, struct pf_addr *, sa_family_t); 1642 void pf_addr_inc(struct pf_addr *, sa_family_t); 1643 1644 void *pf_pull_hdr(struct mbuf *, int, void *, int, u_short *, sa_family_t); 1645 #define PF_HI (true) 1646 #define PF_LO (!PF_HI) 1647 #define PF_ALGNMNT(off) (((off) % 2) == 0 ? PF_HI : PF_LO) 1648 int pf_patch_8(struct pf_pdesc *, u_int8_t *, u_int8_t, bool); 1649 int pf_patch_16(struct pf_pdesc *, u_int16_t *, u_int16_t); 1650 int pf_patch_16_unaligned(struct pf_pdesc *, void *, u_int16_t, bool); 1651 int pf_patch_32(struct pf_pdesc *, u_int32_t *, u_int32_t); 1652 int pf_patch_32_unaligned(struct pf_pdesc *, void *, u_int32_t, bool); 1653 int pflog_packet(struct pf_pdesc *, u_int8_t, struct pf_rule *, 1654 struct pf_rule *, struct pf_ruleset *, struct pf_rule *); 1655 int pf_match_addr(u_int8_t, struct pf_addr *, struct pf_addr *, 1656 struct pf_addr *, sa_family_t); 1657 int pf_match_addr_range(struct pf_addr *, struct pf_addr *, 1658 struct pf_addr *, sa_family_t); 1659 int pf_match(u_int8_t, u_int32_t, u_int32_t, u_int32_t); 1660 int pf_match_port(u_int8_t, u_int16_t, u_int16_t, u_int16_t); 1661 int pf_match_uid(u_int8_t, uid_t, uid_t, uid_t); 1662 int pf_match_gid(u_int8_t, gid_t, gid_t, gid_t); 1663 1664 struct pf_state_scrub * 1665 pf_state_scrub_get(void); 1666 void pf_state_scrub_put(struct pf_state_scrub *); 1667 1668 int pf_refragment6(struct mbuf **, struct m_tag *mtag, 1669 struct sockaddr_in6 *, struct ifnet *, struct rtentry *); 1670 void pf_normalize_init(void); 1671 int pf_normalize_ip(struct pf_pdesc *, u_short *); 1672 int pf_normalize_ip6(struct pf_pdesc *, u_short *); 1673 int pf_normalize_tcp(struct pf_pdesc *); 1674 void pf_normalize_tcp_cleanup(struct pf_state *); 1675 int pf_normalize_tcp_init(struct pf_pdesc *, struct pf_state_peer *); 1676 int pf_normalize_tcp_alloc(struct pf_state_peer *); 1677 int pf_normalize_tcp_stateful(struct pf_pdesc *, u_short *, 1678 struct pf_state *, struct pf_state_peer *, struct pf_state_peer *, 1679 int *); 1680 int pf_normalize_mss(struct pf_pdesc *, u_int16_t); 1681 void pf_scrub(struct mbuf *, u_int16_t, sa_family_t, u_int8_t, u_int8_t); 1682 void pf_purge_expired_fragments(void); 1683 int pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *, 1684 int); 1685 int pf_rtlabel_match(struct pf_addr *, sa_family_t, struct pf_addr_wrap *, 1686 int); 1687 int pf_socket_lookup(struct pf_pdesc *); 1688 struct pf_state_key *pf_alloc_state_key(int); 1689 int pf_ouraddr(struct mbuf *); 1690 void pf_pkt_addr_changed(struct mbuf *); 1691 struct inpcb *pf_inp_lookup(struct mbuf *); 1692 void pf_inp_link(struct mbuf *, struct inpcb *); 1693 void pf_inp_unlink(struct inpcb *); 1694 int pf_translate(struct pf_pdesc *, struct pf_addr *, u_int16_t, 1695 struct pf_addr *, u_int16_t, u_int16_t, int); 1696 int pf_translate_af(struct pf_pdesc *); 1697 void pf_route(struct pf_pdesc *, struct pf_state *); 1698 void pf_route6(struct pf_pdesc *, struct pf_state *); 1699 void pf_init_threshold(struct pf_threshold *, u_int32_t, u_int32_t); 1700 int pf_delay_pkt(struct mbuf *, u_int); 1701 1702 void pfr_initialize(void); 1703 int pfr_match_addr(struct pfr_ktable *, struct pf_addr *, sa_family_t); 1704 void pfr_update_stats(struct pfr_ktable *, struct pf_addr *, 1705 struct pf_pdesc *, int, int); 1706 int pfr_pool_get(struct pf_pool *, struct pf_addr **, 1707 struct pf_addr **, sa_family_t); 1708 int pfr_states_increase(struct pfr_ktable *, struct pf_addr *, int); 1709 int pfr_states_decrease(struct pfr_ktable *, struct pf_addr *, int); 1710 struct pfr_kentry * 1711 pfr_kentry_byaddr(struct pfr_ktable *, struct pf_addr *, sa_family_t, 1712 int); 1713 void pfr_dynaddr_update(struct pfr_ktable *, struct pfi_dynaddr *); 1714 struct pfr_ktable * 1715 pfr_attach_table(struct pf_ruleset *, char *, int); 1716 void pfr_detach_table(struct pfr_ktable *); 1717 int pfr_clr_tables(struct pfr_table *, int *, int); 1718 int pfr_add_tables(struct pfr_table *, int, int *, int); 1719 int pfr_del_tables(struct pfr_table *, int, int *, int); 1720 int pfr_get_tables(struct pfr_table *, struct pfr_table *, int *, int); 1721 int pfr_get_tstats(struct pfr_table *, struct pfr_tstats *, int *, int); 1722 int pfr_clr_tstats(struct pfr_table *, int, int *, int); 1723 int pfr_set_tflags(struct pfr_table *, int, int, int, int *, int *, int); 1724 int pfr_clr_addrs(struct pfr_table *, int *, int); 1725 int pfr_insert_kentry(struct pfr_ktable *, struct pfr_addr *, time_t); 1726 int pfr_add_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1727 int); 1728 int pfr_del_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1729 int); 1730 int pfr_set_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1731 int *, int *, int *, int, u_int32_t); 1732 int pfr_get_addrs(struct pfr_table *, struct pfr_addr *, int *, int); 1733 int pfr_get_astats(struct pfr_table *, struct pfr_astats *, int *, int); 1734 int pfr_clr_astats(struct pfr_table *, struct pfr_addr *, int, int *, 1735 int); 1736 int pfr_tst_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1737 int); 1738 int pfr_ina_begin(struct pfr_table *, u_int32_t *, int *, int); 1739 int pfr_ina_rollback(struct pfr_table *, u_int32_t, int *, int); 1740 int pfr_ina_commit(struct pfr_table *, u_int32_t, int *, int *, int); 1741 int pfr_ina_define(struct pfr_table *, struct pfr_addr *, int, int *, 1742 int *, u_int32_t, int); 1743 struct pfr_ktable 1744 *pfr_ktable_select_active(struct pfr_ktable *); 1745 1746 extern struct pfi_kif *pfi_all; 1747 1748 void pfi_initialize(void); 1749 struct pfi_kif *pfi_kif_alloc(const char *, int); 1750 void pfi_kif_free(struct pfi_kif *); 1751 struct pfi_kif *pfi_kif_find(const char *); 1752 struct pfi_kif *pfi_kif_get(const char *, struct pfi_kif **); 1753 void pfi_kif_ref(struct pfi_kif *, enum pfi_kif_refs); 1754 void pfi_kif_unref(struct pfi_kif *, enum pfi_kif_refs); 1755 int pfi_kif_match(struct pfi_kif *, struct pfi_kif *); 1756 void pfi_attach_ifnet(struct ifnet *); 1757 void pfi_detach_ifnet(struct ifnet *); 1758 void pfi_attach_ifgroup(struct ifg_group *); 1759 void pfi_detach_ifgroup(struct ifg_group *); 1760 void pfi_group_addmember(const char *); 1761 void pfi_group_delmember(const char *); 1762 int pfi_match_addr(struct pfi_dynaddr *, struct pf_addr *, 1763 sa_family_t); 1764 int pfi_dynaddr_setup(struct pf_addr_wrap *, sa_family_t, int); 1765 void pfi_dynaddr_remove(struct pf_addr_wrap *); 1766 void pfi_dynaddr_copyout(struct pf_addr_wrap *); 1767 void pfi_update_status(const char *, struct pf_status *); 1768 void pfi_get_ifaces(const char *, struct pfi_kif *, int *); 1769 int pfi_set_flags(const char *, int); 1770 int pfi_clear_flags(const char *, int); 1771 void pfi_xcommit(void); 1772 1773 int pf_match_tag(struct mbuf *, struct pf_rule *, int *); 1774 u_int16_t pf_tagname2tag(char *, int); 1775 void pf_tag2tagname(u_int16_t, char *); 1776 void pf_tag_ref(u_int16_t); 1777 void pf_tag_unref(u_int16_t); 1778 void pf_tag_packet(struct mbuf *, int, int); 1779 int pf_addr_compare(const struct pf_addr *, 1780 const struct pf_addr *, sa_family_t); 1781 1782 const struct pfq_ops 1783 *pf_queue_manager(struct pf_queuespec *); 1784 1785 extern struct pf_status pf_status; 1786 extern struct pool pf_frent_pl, pf_frag_pl; 1787 1788 /* 1789 * Protection/ownership of pf_pool_limit: 1790 * I immutable after pfattach() 1791 * p pf_lock 1792 */ 1793 1794 struct pf_pool_limit { 1795 void *pp; /* [I] */ 1796 unsigned limit; /* [p] */ 1797 unsigned limit_new; /* [p] */ 1798 }; 1799 extern struct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 1800 1801 #endif /* _KERNEL */ 1802 1803 extern struct pf_anchor_global pf_anchors; 1804 extern struct pf_anchor pf_main_anchor; 1805 #define pf_main_ruleset pf_main_anchor.ruleset 1806 1807 struct tcphdr; 1808 1809 /* these ruleset functions can be linked into userland programs (pfctl) */ 1810 void pf_init_ruleset(struct pf_ruleset *); 1811 int pf_anchor_setup(struct pf_rule *, 1812 const struct pf_ruleset *, const char *); 1813 int pf_anchor_copyout(const struct pf_ruleset *, 1814 const struct pf_rule *, struct pfioc_rule *); 1815 void pf_remove_anchor(struct pf_rule *); 1816 void pf_remove_if_empty_ruleset(struct pf_ruleset *); 1817 struct pf_anchor *pf_find_anchor(const char *); 1818 struct pf_ruleset *pf_find_ruleset(const char *); 1819 struct pf_ruleset *pf_get_leaf_ruleset(char *, char **); 1820 struct pf_anchor *pf_create_anchor(struct pf_anchor *, const char *); 1821 struct pf_ruleset *pf_find_or_create_ruleset(const char *); 1822 void pf_anchor_rele(struct pf_anchor *); 1823 struct pf_anchor *pf_anchor_take(struct pf_anchor *); 1824 1825 /* The fingerprint functions can be linked into userland programs (tcpdump) */ 1826 int pf_osfp_add(struct pf_osfp_ioctl *); 1827 #ifdef _KERNEL 1828 struct pf_osfp_enlist * 1829 pf_osfp_fingerprint(struct pf_pdesc *); 1830 #endif /* _KERNEL */ 1831 struct pf_osfp_enlist * 1832 pf_osfp_fingerprint_hdr(const struct ip *, const struct ip6_hdr *, 1833 const struct tcphdr *); 1834 void pf_osfp_flush(void); 1835 int pf_osfp_get(struct pf_osfp_ioctl *); 1836 void pf_osfp_initialize(void); 1837 int pf_osfp_match(struct pf_osfp_enlist *, pf_osfp_t); 1838 struct pf_os_fingerprint * 1839 pf_osfp_validate(void); 1840 1841 #ifdef _KERNEL 1842 void pf_print_host(struct pf_addr *, u_int16_t, 1843 sa_family_t); 1844 int pf_get_transaddr(struct pf_rule *, struct pf_pdesc *, 1845 struct pf_src_node **, struct pf_rule **); 1846 int pf_map_addr(sa_family_t, struct pf_rule *, 1847 struct pf_addr *, struct pf_addr *, 1848 struct pf_addr *, struct pf_src_node **, 1849 struct pf_pool *, enum pf_sn_types); 1850 int pf_postprocess_addr(struct pf_state *); 1851 1852 void pf_mbuf_link_state_key(struct mbuf *, 1853 struct pf_state_key *); 1854 void pf_mbuf_unlink_state_key(struct mbuf *); 1855 void pf_mbuf_link_inpcb(struct mbuf *, struct inpcb *); 1856 void pf_mbuf_unlink_inpcb(struct mbuf *); 1857 1858 u_int8_t* pf_find_tcpopt(u_int8_t *, u_int8_t *, size_t, 1859 u_int8_t, u_int8_t); 1860 u_int8_t pf_get_wscale(struct pf_pdesc *); 1861 u_int16_t pf_get_mss(struct pf_pdesc *); 1862 struct mbuf * pf_build_tcp(const struct pf_rule *, sa_family_t, 1863 const struct pf_addr *, const struct pf_addr *, 1864 u_int16_t, u_int16_t, u_int32_t, u_int32_t, 1865 u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 1866 u_int16_t, u_int, u_int); 1867 void pf_send_tcp(const struct pf_rule *, sa_family_t, 1868 const struct pf_addr *, const struct pf_addr *, 1869 u_int16_t, u_int16_t, u_int32_t, u_int32_t, 1870 u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 1871 u_int16_t, u_int); 1872 void pf_syncookies_init(void); 1873 int pf_syncookies_setmode(u_int8_t); 1874 int pf_syncookies_setwats(u_int32_t, u_int32_t); 1875 int pf_syncookies_getwats(struct pfioc_synflwats *); 1876 int pf_synflood_check(struct pf_pdesc *); 1877 void pf_syncookie_send(struct pf_pdesc *); 1878 u_int8_t pf_syncookie_validate(struct pf_pdesc *); 1879 struct mbuf * pf_syncookie_recreate_syn(struct pf_pdesc *); 1880 #endif /* _KERNEL */ 1881 1882 #endif /* _NET_PFVAR_H_ */ 1883