1 /* $OpenBSD: pfvar.h,v 1.538 2024/05/13 01:15:53 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/rwlock.h> 40 #include <sys/syslimits.h> 41 #include <sys/refcnt.h> 42 #include <sys/timeout.h> 43 44 #include <netinet/in.h> 45 46 #include <net/radix.h> 47 #include <net/route.h> 48 49 struct ip; 50 struct ip6_hdr; 51 struct mbuf_list; 52 53 #define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0) 54 #define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1) 55 56 #define PF_MD5_DIGEST_LENGTH 16 57 #ifdef MD5_DIGEST_LENGTH 58 #if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH 59 #error md5 digest length mismatch 60 #endif 61 #endif 62 63 typedef struct refcnt pf_refcnt_t; 64 #define PF_REF_INIT(_x) refcnt_init(&(_x)) 65 #define PF_REF_TAKE(_x) refcnt_take(&(_x)) 66 #define PF_REF_RELE(_x) refcnt_rele(&(_x)) 67 68 enum { PF_INOUT, PF_IN, PF_OUT, PF_FWD }; 69 enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT, 70 PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP, PF_DEFER, 71 PF_MATCH, PF_DIVERT, PF_RT, PF_AFRT }; 72 enum { PF_TRANS_RULESET, PF_TRANS_TABLE }; 73 enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT, 74 PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG }; 75 enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL, 76 PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER, 77 PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET }; 78 enum { PF_GET_NONE, PF_GET_CLR_CNTR }; 79 enum { PF_SK_WIRE, PF_SK_STACK, PF_SK_BOTH }; 80 enum { PF_PEER_SRC, PF_PEER_DST, PF_PEER_BOTH }; 81 82 /* 83 * Note about PFTM_*: real indices into pf_rule.timeout[] come before 84 * PFTM_MAX, special cases afterwards. See pf_state_expires(). 85 */ 86 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED, 87 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED, 88 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE, 89 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY, 90 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE, 91 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL, 92 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE, 93 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED }; 94 95 /* PFTM default values */ 96 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */ 97 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */ 98 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */ 99 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */ 100 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */ 101 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */ 102 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */ 103 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */ 104 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */ 105 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */ 106 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */ 107 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */ 108 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */ 109 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */ 110 #define PFTM_FRAG_VAL 60 /* Fragment expire */ 111 #define PFTM_INTERVAL_VAL 10 /* Expire interval */ 112 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */ 113 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */ 114 115 /* 116 * For each connection (combination of proto,src,dst,af) the number 117 * of fragments is limited. Over the PFTM_FRAG interval the average 118 * rate must be less than PF_FRAG_STALE fragments per second. 119 * Otherwise older fragments are considered stale and are dropped. 120 */ 121 #define PF_FRAG_STALE 200 122 123 /* 124 * Limit the length of the fragment queue traversal. Remember 125 * search entry points based on the fragment offset. 126 */ 127 #define PF_FRAG_ENTRY_POINTS 16 128 129 /* 130 * The number of entries in the fragment queue must be limited 131 * to avoid DoS by linear searching. Instead of a global limit, 132 * use a limit per entry point. For large packets these sum up. 133 */ 134 #define PF_FRAG_ENTRY_LIMIT 64 135 136 enum { PF_NOPFROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO }; 137 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS, 138 PF_LIMIT_TABLES, PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_PKTDELAY_PKTS, 139 PF_LIMIT_ANCHORS, PF_LIMIT_MAX }; 140 #define PF_POOL_IDMASK 0x0f 141 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM, 142 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN, PF_POOL_LEASTSTATES }; 143 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL, 144 PF_ADDR_TABLE, PF_ADDR_RTLABEL, PF_ADDR_URPFFAILED, 145 PF_ADDR_RANGE, PF_ADDR_NONE }; 146 #define PF_POOL_TYPEMASK 0x0f 147 #define PF_POOL_STICKYADDR 0x20 148 #define PF_WSCALE_FLAG 0x80 149 #define PF_WSCALE_MASK 0x0f 150 151 #define PF_POOL_DYNTYPE(_o) \ 152 ((((_o) & PF_POOL_TYPEMASK) == PF_POOL_ROUNDROBIN) || \ 153 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_LEASTSTATES) || \ 154 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_RANDOM) || \ 155 (((_o) & PF_POOL_TYPEMASK) == PF_POOL_SRCHASH)) 156 157 #define PF_LOG 0x01 158 #define PF_LOG_ALL 0x02 159 #define PF_LOG_USER 0x04 160 #define PF_LOG_FORCE 0x08 161 #define PF_LOG_MATCHES 0x10 162 163 struct pf_addr { 164 union { 165 struct in_addr v4; 166 struct in6_addr v6; 167 u_int8_t addr8[16]; 168 u_int16_t addr16[8]; 169 u_int32_t addr32[4]; 170 } pfa; /* 128-bit address */ 171 #define v4 pfa.v4 172 #define v6 pfa.v6 173 #define addr8 pfa.addr8 174 #define addr16 pfa.addr16 175 #define addr32 pfa.addr32 176 }; 177 178 #define PF_TABLE_NAME_SIZE 32 179 180 #define PFI_AFLAG_NETWORK 0x01 181 #define PFI_AFLAG_BROADCAST 0x02 182 #define PFI_AFLAG_PEER 0x04 183 #define PFI_AFLAG_MODEMASK 0x07 184 #define PFI_AFLAG_NOALIAS 0x08 185 186 struct pf_addr_wrap { 187 union { 188 struct { 189 struct pf_addr addr; 190 struct pf_addr mask; 191 } a; 192 char ifname[IFNAMSIZ]; 193 char tblname[PF_TABLE_NAME_SIZE]; 194 char rtlabelname[RTLABEL_LEN]; 195 u_int32_t rtlabel; 196 } v; 197 union { 198 struct pfi_dynaddr *dyn; 199 struct pfr_ktable *tbl; 200 int dyncnt; 201 int tblcnt; 202 } p; 203 u_int8_t type; /* PF_ADDR_* */ 204 u_int8_t iflags; /* PFI_AFLAG_* */ 205 }; 206 207 #ifdef _KERNEL 208 struct pfi_dynaddr { 209 TAILQ_ENTRY(pfi_dynaddr) entry; 210 struct pf_addr pfid_addr4; 211 struct pf_addr pfid_mask4; 212 struct pf_addr pfid_addr6; 213 struct pf_addr pfid_mask6; 214 struct pfr_ktable *pfid_kt; 215 struct pfi_kif *pfid_kif; 216 void *pfid_hook_cookie; 217 int pfid_net; /* mask or 128 */ 218 int pfid_acnt4; /* address count IPv4 */ 219 int pfid_acnt6; /* address count IPv6 */ 220 sa_family_t pfid_af; /* rule af */ 221 u_int8_t pfid_iflags; /* PFI_AFLAG_* */ 222 }; 223 #endif /* _KERNEL */ 224 225 226 /* 227 * Logging macros 228 */ 229 230 #ifndef PF_DEBUGNAME 231 #define PF_DEBUGNAME "pf: " 232 #endif 233 234 #ifdef _KERNEL 235 #define DPFPRINTF(n, format, x...) \ 236 do { \ 237 if (pf_status.debug >= (n)) { \ 238 log(n, PF_DEBUGNAME); \ 239 addlog(format, ##x); \ 240 addlog("\n"); \ 241 } \ 242 } while (0) 243 #else 244 #ifdef PFDEBUG 245 #define DPFPRINTF(n, format, x...) \ 246 do { \ 247 fprintf(stderr, format, ##x); \ 248 fprintf(stderr, "\n"); \ 249 } while (0) 250 #else 251 #define DPFPRINTF(n, format, x...) ((void)0) 252 #endif /* PFDEBUG */ 253 #endif /* _KERNEL */ 254 255 256 /* 257 * Address manipulation macros 258 */ 259 260 #define PF_AEQ(a, b, c) \ 261 ((c == AF_INET && (a)->addr32[0] == (b)->addr32[0]) || \ 262 (c == AF_INET6 && \ 263 (a)->addr32[3] == (b)->addr32[3] && \ 264 (a)->addr32[2] == (b)->addr32[2] && \ 265 (a)->addr32[1] == (b)->addr32[1] && \ 266 (a)->addr32[0] == (b)->addr32[0])) \ 267 268 #define PF_ANEQ(a, b, c) \ 269 ((c == AF_INET && (a)->addr32[0] != (b)->addr32[0]) || \ 270 (c == AF_INET6 && \ 271 ((a)->addr32[3] != (b)->addr32[3] || \ 272 (a)->addr32[2] != (b)->addr32[2] || \ 273 (a)->addr32[1] != (b)->addr32[1] || \ 274 (a)->addr32[0] != (b)->addr32[0]))) \ 275 276 #define PF_AZERO(a, c) \ 277 ((c == AF_INET && !(a)->addr32[0]) || \ 278 (c == AF_INET6 && \ 279 !(a)->addr32[0] && !(a)->addr32[1] && \ 280 !(a)->addr32[2] && !(a)->addr32[3] )) \ 281 282 #define PF_MISMATCHAW(aw, x, af, neg, ifp, rtid) \ 283 ( \ 284 (((aw)->type == PF_ADDR_NOROUTE && \ 285 pf_routable((x), (af), NULL, (rtid))) || \ 286 (((aw)->type == PF_ADDR_URPFFAILED && (ifp) != NULL && \ 287 pf_routable((x), (af), (ifp), (rtid))) || \ 288 ((aw)->type == PF_ADDR_RTLABEL && \ 289 !pf_rtlabel_match((x), (af), (aw), (rtid))) || \ 290 ((aw)->type == PF_ADDR_TABLE && \ 291 !pfr_match_addr((aw)->p.tbl, (x), (af))) || \ 292 ((aw)->type == PF_ADDR_DYNIFTL && \ 293 !pfi_match_addr((aw)->p.dyn, (x), (af))) || \ 294 ((aw)->type == PF_ADDR_RANGE && \ 295 !pf_match_addr_range(&(aw)->v.a.addr, \ 296 &(aw)->v.a.mask, (x), (af))) || \ 297 ((aw)->type == PF_ADDR_ADDRMASK && \ 298 !PF_AZERO(&(aw)->v.a.mask, (af)) && \ 299 !pf_match_addr(0, &(aw)->v.a.addr, \ 300 &(aw)->v.a.mask, (x), (af))))) != \ 301 (neg) \ 302 ) 303 304 struct pf_rule_uid { 305 uid_t uid[2]; 306 u_int8_t op; 307 }; 308 309 struct pf_rule_gid { 310 uid_t gid[2]; 311 u_int8_t op; 312 }; 313 314 struct pf_rule_addr { 315 struct pf_addr_wrap addr; 316 u_int16_t port[2]; 317 u_int8_t neg; 318 u_int8_t port_op; 319 u_int16_t weight; 320 }; 321 322 struct pf_threshold { 323 u_int32_t limit; 324 #define PF_THRESHOLD_MULT 1000 325 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT 326 u_int32_t seconds; 327 u_int32_t count; 328 u_int32_t last; 329 }; 330 331 struct pf_poolhashkey { 332 union { 333 u_int8_t key8[16]; 334 u_int16_t key16[8]; 335 u_int32_t key32[4]; 336 } pfk; /* 128-bit hash key */ 337 #define key8 pfk.key8 338 #define key16 pfk.key16 339 #define key32 pfk.key32 340 }; 341 342 struct pf_pool { 343 struct pf_addr_wrap addr; 344 struct pf_poolhashkey key; 345 struct pf_addr counter; 346 char ifname[IFNAMSIZ]; 347 struct pfi_kif *kif; 348 int tblidx; 349 u_int64_t states; 350 int curweight; 351 u_int16_t weight; 352 u_int16_t proxy_port[2]; 353 u_int8_t port_op; 354 u_int8_t opts; 355 }; 356 357 /* A packed Operating System description for fingerprinting */ 358 typedef u_int32_t pf_osfp_t; 359 #define PF_OSFP_ANY ((pf_osfp_t)0) 360 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1) 361 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2) 362 363 struct pf_osfp_entry { 364 SLIST_ENTRY(pf_osfp_entry) fp_entry; 365 pf_osfp_t fp_os; 366 int fp_enflags; 367 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */ 368 #define PF_OSFP_GENERIC 0x002 /* generic signature */ 369 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */ 370 #define PF_OSFP_LEN 32 371 u_char fp_class_nm[PF_OSFP_LEN]; 372 u_char fp_version_nm[PF_OSFP_LEN]; 373 u_char fp_subtype_nm[PF_OSFP_LEN]; 374 }; 375 #define PF_OSFP_ENTRY_EQ(a, b) \ 376 ((a)->fp_os == (b)->fp_os && \ 377 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \ 378 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \ 379 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0) 380 381 /* handle pf_osfp_t packing */ 382 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */ 383 #define _FP_UNUSED_BITS 1 384 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */ 385 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */ 386 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */ 387 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \ 388 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \ 389 ((1 << _FP_CLASS_BITS) - 1); \ 390 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \ 391 ((1 << _FP_VERSION_BITS) - 1);\ 392 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 393 } while(0) 394 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \ 395 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \ 396 + _FP_SUBTYPE_BITS); \ 397 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \ 398 _FP_SUBTYPE_BITS; \ 399 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \ 400 } while(0) 401 402 /* the fingerprint of an OSes TCP SYN packet */ 403 typedef u_int64_t pf_tcpopts_t; 404 struct pf_os_fingerprint { 405 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */ 406 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 407 u_int16_t fp_wsize; /* TCP window size */ 408 u_int16_t fp_psize; /* ip->ip_len */ 409 u_int16_t fp_mss; /* TCP MSS */ 410 u_int16_t fp_flags; 411 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */ 412 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */ 413 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */ 414 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */ 415 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */ 416 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */ 417 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */ 418 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */ 419 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */ 420 #define PF_OSFP_MSS 0x0200 /* TCP MSS */ 421 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */ 422 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */ 423 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */ 424 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */ 425 #define PF_OSFP_INET6 0x4000 /* IPv6 */ 426 u_int8_t fp_optcnt; /* TCP option count */ 427 u_int8_t fp_wscale; /* TCP window scaling */ 428 u_int8_t fp_ttl; /* IPv4 TTL */ 429 #define PF_OSFP_MAXTTL_OFFSET 40 430 /* TCP options packing */ 431 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */ 432 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */ 433 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */ 434 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */ 435 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */ 436 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */ 437 #define PF_OSFP_MAX_OPTS \ 438 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \ 439 / PF_OSFP_TCPOPT_BITS 440 441 SLIST_ENTRY(pf_os_fingerprint) fp_next; 442 }; 443 444 struct pf_osfp_ioctl { 445 struct pf_osfp_entry fp_os; 446 pf_tcpopts_t fp_tcpopts; /* packed TCP options */ 447 u_int16_t fp_wsize; /* TCP window size */ 448 u_int16_t fp_psize; /* ip->ip_len */ 449 u_int16_t fp_mss; /* TCP MSS */ 450 u_int16_t fp_flags; 451 u_int8_t fp_optcnt; /* TCP option count */ 452 u_int8_t fp_wscale; /* TCP window scaling */ 453 u_int8_t fp_ttl; /* IPv4 TTL */ 454 455 int fp_getnum; /* DIOCOSFPGET number */ 456 }; 457 458 struct pf_rule_actions { 459 int rtableid; 460 u_int16_t qid; 461 u_int16_t pqid; 462 u_int16_t max_mss; 463 u_int16_t flags; 464 u_int16_t delay; 465 u_int8_t log; 466 u_int8_t set_tos; 467 u_int8_t min_ttl; 468 u_int8_t set_prio[2]; 469 u_int8_t pad[1]; 470 }; 471 472 union pf_rule_ptr { 473 struct pf_rule *ptr; 474 u_int32_t nr; 475 }; 476 477 #define PF_ANCHOR_STACK_MAX 64 478 #define PF_ANCHOR_NAME_SIZE 64 479 #define PF_ANCHOR_MAXPATH (PATH_MAX - PF_ANCHOR_NAME_SIZE - 1) 480 #define PF_ANCHOR_HIWAT 512 481 #define PF_OPTIMIZER_TABLE_PFX "__automatic_" 482 483 struct pf_rule { 484 struct pf_rule_addr src; 485 struct pf_rule_addr dst; 486 #define PF_SKIP_IFP 0 487 #define PF_SKIP_DIR 1 488 #define PF_SKIP_RDOM 2 489 #define PF_SKIP_AF 3 490 #define PF_SKIP_PROTO 4 491 #define PF_SKIP_SRC_ADDR 5 492 #define PF_SKIP_DST_ADDR 6 493 #define PF_SKIP_SRC_PORT 7 494 #define PF_SKIP_DST_PORT 8 495 #define PF_SKIP_COUNT 9 496 union pf_rule_ptr skip[PF_SKIP_COUNT]; 497 #define PF_RULE_LABEL_SIZE 64 498 char label[PF_RULE_LABEL_SIZE]; 499 #define PF_QNAME_SIZE 64 500 char ifname[IFNAMSIZ]; 501 char rcv_ifname[IFNAMSIZ]; 502 char qname[PF_QNAME_SIZE]; 503 char pqname[PF_QNAME_SIZE]; 504 #define PF_TAG_NAME_SIZE 64 505 char tagname[PF_TAG_NAME_SIZE]; 506 char match_tagname[PF_TAG_NAME_SIZE]; 507 508 char overload_tblname[PF_TABLE_NAME_SIZE]; 509 510 TAILQ_ENTRY(pf_rule) entries; 511 struct pf_pool nat; 512 struct pf_pool rdr; 513 struct pf_pool route; 514 struct pf_threshold pktrate; 515 516 u_int64_t evaluations; 517 u_int64_t packets[2]; 518 u_int64_t bytes[2]; 519 520 struct pfi_kif *kif; 521 struct pfi_kif *rcv_kif; 522 struct pf_anchor *anchor; 523 struct pfr_ktable *overload_tbl; 524 525 pf_osfp_t os_fingerprint; 526 527 int rtableid; 528 int onrdomain; 529 u_int32_t timeout[PFTM_MAX]; 530 u_int32_t states_cur; 531 u_int32_t states_tot; 532 u_int32_t max_states; 533 u_int32_t src_nodes; 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 u_int16_t return_icmp; 550 u_int16_t return_icmp6; 551 u_int16_t max_mss; 552 u_int16_t tag; 553 u_int16_t match_tag; 554 u_int16_t scrub_flags; 555 u_int16_t delay; 556 557 struct pf_rule_uid uid; 558 struct pf_rule_gid gid; 559 560 u_int32_t rule_flag; 561 u_int8_t action; 562 u_int8_t direction; 563 u_int8_t log; 564 u_int8_t logif; 565 u_int8_t quick; 566 u_int8_t ifnot; 567 u_int8_t match_tag_not; 568 569 #define PF_STATE_NORMAL 0x1 570 #define PF_STATE_MODULATE 0x2 571 #define PF_STATE_SYNPROXY 0x3 572 u_int8_t keep_state; 573 sa_family_t af; 574 u_int8_t proto; 575 u_int16_t type; /* aux. value 256 is legit */ 576 u_int16_t code; /* aux. value 256 is legit */ 577 u_int8_t flags; 578 u_int8_t flagset; 579 u_int8_t min_ttl; 580 u_int8_t allow_opts; 581 u_int8_t rt; 582 u_int8_t return_ttl; 583 u_int8_t tos; 584 u_int8_t set_tos; 585 u_int8_t anchor_relative; 586 u_int8_t anchor_wildcard; 587 588 #define PF_FLUSH 0x01 589 #define PF_FLUSH_GLOBAL 0x02 590 u_int8_t flush; 591 u_int8_t prio; 592 u_int8_t set_prio[2]; 593 sa_family_t naf; 594 u_int8_t rcvifnot; 595 596 struct { 597 struct pf_addr addr; 598 u_int16_t port; 599 u_int8_t type; 600 } divert; 601 602 time_t exptime; 603 }; 604 605 /* rule flags */ 606 #define PFRULE_DROP 0x0000 607 #define PFRULE_RETURNRST 0x0001 608 #define PFRULE_FRAGMENT 0x0002 609 #define PFRULE_RETURNICMP 0x0004 610 #define PFRULE_RETURN 0x0008 611 #define PFRULE_NOSYNC 0x0010 612 #define PFRULE_SRCTRACK 0x0020 /* track source states */ 613 #define PFRULE_RULESRCTRACK 0x0040 /* per rule */ 614 #define PFRULE_SETDELAY 0x0080 615 616 /* rule flags again */ 617 #define PFRULE_IFBOUND 0x00010000 /* if-bound */ 618 #define PFRULE_STATESLOPPY 0x00020000 /* sloppy state tracking */ 619 #define PFRULE_PFLOW 0x00040000 620 #define PFRULE_ONCE 0x00100000 /* one shot rule */ 621 #define PFRULE_AFTO 0x00200000 /* af-to rule */ 622 #define PFRULE_EXPIRED 0x00400000 /* one shot rule hit by pkt */ 623 624 #define PFSTATE_HIWAT 100000 /* default state table size */ 625 #define PFSTATE_ADAPT_START 60000 /* default adaptive timeout start */ 626 #define PFSTATE_ADAPT_END 120000 /* default adaptive timeout end */ 627 #define PF_PKTDELAY_MAXPKTS 10000 /* max # of pkts held in delay queue */ 628 629 struct pf_rule_item { 630 SLIST_ENTRY(pf_rule_item) entry; 631 struct pf_rule *r; 632 }; 633 634 SLIST_HEAD(pf_rule_slist, pf_rule_item); 635 636 enum pf_sn_types { PF_SN_NONE, PF_SN_NAT, PF_SN_RDR, PF_SN_ROUTE, PF_SN_MAX }; 637 638 struct pf_src_node { 639 RB_ENTRY(pf_src_node) entry; 640 struct pf_addr addr; 641 struct pf_addr raddr; 642 union pf_rule_ptr rule; 643 struct pfi_kif *kif; 644 u_int64_t bytes[2]; 645 u_int64_t packets[2]; 646 u_int32_t states; 647 u_int32_t conn; 648 struct pf_threshold conn_rate; 649 int32_t creation; 650 int32_t expire; 651 sa_family_t af; 652 sa_family_t naf; 653 u_int8_t type; 654 }; 655 656 struct pf_sn_item { 657 SLIST_ENTRY(pf_sn_item) next; 658 struct pf_src_node *sn; 659 }; 660 661 SLIST_HEAD(pf_sn_head, pf_sn_item); 662 663 #define PFSNODE_HIWAT 10000 /* default source node table size */ 664 665 struct pf_state_scrub { 666 struct timeval pfss_last; /* time received last packet */ 667 u_int32_t pfss_tsecr; /* last echoed timestamp */ 668 u_int32_t pfss_tsval; /* largest timestamp */ 669 u_int32_t pfss_tsval0; /* original timestamp */ 670 u_int16_t pfss_flags; 671 #define PFSS_TIMESTAMP 0x0001 /* modulate timestamp */ 672 #define PFSS_PAWS 0x0010 /* stricter PAWS checks */ 673 #define PFSS_PAWS_IDLED 0x0020 /* was idle too long. no PAWS */ 674 #define PFSS_DATA_TS 0x0040 /* timestamp on data packets */ 675 #define PFSS_DATA_NOTS 0x0080 /* no timestamp on data packets */ 676 u_int8_t pfss_ttl; /* stashed TTL */ 677 u_int8_t pad; 678 u_int32_t pfss_ts_mod; /* timestamp modulation */ 679 }; 680 681 struct pf_state_host { 682 struct pf_addr addr; 683 u_int16_t port; 684 u_int16_t pad; 685 }; 686 687 struct pf_state_peer { 688 struct pf_state_scrub *scrub; /* state is scrubbed */ 689 u_int32_t seqlo; /* Max sequence number sent */ 690 u_int32_t seqhi; /* Max the other end ACKd + win */ 691 u_int32_t seqdiff; /* Sequence number modulator */ 692 u_int16_t max_win; /* largest window (pre scaling) */ 693 u_int16_t mss; /* Maximum segment size option */ 694 u_int8_t state; /* active state level */ 695 u_int8_t wscale; /* window scaling factor */ 696 u_int8_t tcp_est; /* Did we reach TCPS_ESTABLISHED */ 697 u_int8_t pad[1]; 698 }; 699 700 TAILQ_HEAD(pf_state_queue, pf_state); 701 702 /* keep synced with struct pf_state_key, used in RB_FIND */ 703 struct pf_state_key_cmp { 704 struct pf_addr addr[2]; 705 u_int16_t port[2]; 706 u_int16_t rdomain; 707 u_int16_t hash; 708 sa_family_t af; 709 u_int8_t proto; 710 }; 711 712 /* keep synced with struct pf_state, used in RB_FIND */ 713 struct pf_state_cmp { 714 u_int64_t id; 715 u_int32_t creatorid; 716 u_int8_t direction; 717 u_int8_t pad[3]; 718 }; 719 720 /* struct pf_state.state_flags */ 721 #define PFSTATE_ALLOWOPTS 0x0001 722 #define PFSTATE_SLOPPY 0x0002 723 #define PFSTATE_PFLOW 0x0004 724 #define PFSTATE_NOSYNC 0x0008 725 #define PFSTATE_ACK 0x0010 726 #define PFSTATE_NODF 0x0020 727 #define PFSTATE_SETTOS 0x0040 728 #define PFSTATE_RANDOMID 0x0080 729 #define PFSTATE_SCRUB_TCP 0x0100 730 #define PFSTATE_SETPRIO 0x0200 731 #define PFSTATE_INP_UNLINKED 0x0400 732 #define PFSTATE_SCRUBMASK (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SCRUB_TCP) 733 #define PFSTATE_SETMASK (PFSTATE_SETTOS|PFSTATE_SETPRIO) 734 735 /* 736 * Unified state structures for pulling states out of the kernel 737 * used by pfsync(4) and the pf(4) ioctl. 738 */ 739 struct pfsync_state_scrub { 740 u_int16_t pfss_flags; 741 u_int8_t pfss_ttl; /* stashed TTL */ 742 #define PFSYNC_SCRUB_FLAG_VALID 0x01 743 u_int8_t scrub_flag; 744 u_int32_t pfss_ts_mod; /* timestamp modulation */ 745 } __packed; 746 747 struct pfsync_state_peer { 748 struct pfsync_state_scrub scrub; /* state is scrubbed */ 749 u_int32_t seqlo; /* Max sequence number sent */ 750 u_int32_t seqhi; /* Max the other end ACKd + win */ 751 u_int32_t seqdiff; /* Sequence number modulator */ 752 u_int16_t max_win; /* largest window (pre scaling) */ 753 u_int16_t mss; /* Maximum segment size option */ 754 u_int8_t state; /* active state level */ 755 u_int8_t wscale; /* window scaling factor */ 756 u_int8_t pad[6]; 757 } __packed; 758 759 struct pfsync_state_key { 760 struct pf_addr addr[2]; 761 u_int16_t port[2]; 762 u_int16_t rdomain; 763 sa_family_t af; 764 u_int8_t pad; 765 }; 766 767 struct pfsync_state { 768 u_int64_t id; 769 char ifname[IFNAMSIZ]; 770 struct pfsync_state_key key[2]; 771 struct pfsync_state_peer src; 772 struct pfsync_state_peer dst; 773 struct pf_addr rt_addr; 774 u_int32_t rule; 775 u_int32_t anchor; 776 u_int32_t nat_rule; 777 u_int32_t creation; 778 u_int32_t expire; 779 u_int32_t packets[2][2]; 780 u_int32_t bytes[2][2]; 781 u_int32_t creatorid; 782 int32_t rtableid[2]; 783 u_int16_t max_mss; 784 sa_family_t af; 785 u_int8_t proto; 786 u_int8_t direction; 787 u_int8_t log; 788 u_int8_t rt; 789 u_int8_t timeout; 790 u_int8_t sync_flags; 791 u_int8_t updates; 792 u_int8_t min_ttl; 793 u_int8_t set_tos; 794 u_int16_t state_flags; 795 u_int8_t set_prio[2]; 796 } __packed; 797 798 #define PFSYNC_FLAG_SRCNODE 0x04 799 #define PFSYNC_FLAG_NATSRCNODE 0x08 800 801 #define pf_state_counter_hton(s,d) do { \ 802 d[0] = htonl((s>>32)&0xffffffff); \ 803 d[1] = htonl(s&0xffffffff); \ 804 } while (0) 805 806 #define pf_state_counter_from_pfsync(s) \ 807 (((u_int64_t)(s[0])<<32) | (u_int64_t)(s[1])) 808 809 #define pf_state_counter_ntoh(s,d) do { \ 810 d = ntohl(s[0]); \ 811 d = d<<32; \ 812 d += ntohl(s[1]); \ 813 } while (0) 814 815 TAILQ_HEAD(pf_rulequeue, pf_rule); 816 817 struct pf_anchor; 818 819 struct pf_ruleset { 820 struct { 821 struct pf_rulequeue queues[2]; 822 struct { 823 struct pf_rulequeue *ptr; 824 u_int32_t rcount; 825 u_int32_t version; 826 int open; 827 } active, inactive; 828 } rules; 829 struct pf_anchor *anchor; 830 u_int32_t tticket; 831 int tables; 832 int topen; 833 }; 834 835 RB_HEAD(pf_anchor_global, pf_anchor); 836 RB_HEAD(pf_anchor_node, pf_anchor); 837 struct pf_anchor { 838 RB_ENTRY(pf_anchor) entry_global; 839 RB_ENTRY(pf_anchor) entry_node; 840 struct pf_anchor *parent; 841 struct pf_anchor_node children; 842 char name[PF_ANCHOR_NAME_SIZE]; 843 char path[PATH_MAX]; 844 struct pf_ruleset ruleset; 845 int refcnt; /* anchor rules */ 846 int match; 847 struct refcnt ref; /* for transactions */ 848 }; 849 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare) 850 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare) 851 852 #define PF_RESERVED_ANCHOR "_pf" 853 854 #define PFR_TFLAG_PERSIST 0x00000001 855 #define PFR_TFLAG_CONST 0x00000002 856 #define PFR_TFLAG_ACTIVE 0x00000004 857 #define PFR_TFLAG_INACTIVE 0x00000008 858 #define PFR_TFLAG_REFERENCED 0x00000010 859 #define PFR_TFLAG_REFDANCHOR 0x00000020 860 #define PFR_TFLAG_COUNTERS 0x00000040 861 /* Adjust masks below when adding flags. */ 862 #define PFR_TFLAG_USRMASK 0x00000043 863 #define PFR_TFLAG_SETMASK 0x0000003C 864 #define PFR_TFLAG_ALLMASK 0x0000007F 865 866 struct pfr_table { 867 char pfrt_anchor[PATH_MAX]; 868 char pfrt_name[PF_TABLE_NAME_SIZE]; 869 u_int32_t pfrt_flags; 870 u_int8_t pfrt_fback; 871 }; 872 873 enum { PFR_FB_NONE, PFR_FB_MATCH, PFR_FB_ADDED, PFR_FB_DELETED, 874 PFR_FB_CHANGED, PFR_FB_CLEARED, PFR_FB_DUPLICATE, 875 PFR_FB_NOTMATCH, PFR_FB_CONFLICT, PFR_FB_NOCOUNT, PFR_FB_MAX }; 876 877 struct pfr_addr { 878 union { 879 struct in_addr _pfra_ip4addr; 880 struct in6_addr _pfra_ip6addr; 881 } pfra_u; 882 char pfra_ifname[IFNAMSIZ]; 883 u_int32_t pfra_states; 884 u_int16_t pfra_weight; 885 u_int8_t pfra_af; 886 u_int8_t pfra_net; 887 u_int8_t pfra_not; 888 u_int8_t pfra_fback; 889 u_int8_t pfra_type; 890 u_int8_t pad[7]; 891 }; 892 #define pfra_ip4addr pfra_u._pfra_ip4addr 893 #define pfra_ip6addr pfra_u._pfra_ip6addr 894 895 enum { PFR_DIR_IN, PFR_DIR_OUT, PFR_DIR_MAX }; 896 enum { PFR_OP_BLOCK, PFR_OP_MATCH, PFR_OP_PASS, PFR_OP_ADDR_MAX, 897 PFR_OP_TABLE_MAX }; 898 #define PFR_OP_XPASS PFR_OP_ADDR_MAX 899 900 struct pfr_astats { 901 struct pfr_addr pfras_a; 902 u_int64_t pfras_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 903 u_int64_t pfras_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 904 time_t pfras_tzero; 905 }; 906 907 enum { PFR_REFCNT_RULE, PFR_REFCNT_ANCHOR, PFR_REFCNT_MAX }; 908 909 struct pfr_tstats { 910 struct pfr_table pfrts_t; 911 u_int64_t pfrts_packets[PFR_DIR_MAX][PFR_OP_TABLE_MAX]; 912 u_int64_t pfrts_bytes[PFR_DIR_MAX][PFR_OP_TABLE_MAX]; 913 u_int64_t pfrts_match; 914 u_int64_t pfrts_nomatch; 915 time_t pfrts_tzero; 916 int pfrts_cnt; 917 int pfrts_refcnt[PFR_REFCNT_MAX]; 918 }; 919 #define pfrts_name pfrts_t.pfrt_name 920 #define pfrts_flags pfrts_t.pfrt_flags 921 922 struct pfr_kcounters { 923 u_int64_t pfrkc_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 924 u_int64_t pfrkc_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX]; 925 u_int64_t states; 926 }; 927 928 /* 929 * XXX ip_ipsp.h's sockaddr_union should be converted to sockaddr * 930 * passing with correct sa_len, then a good approach for cleaning this 931 * will become more clear. 932 */ 933 union pfsockaddr_union { 934 struct sockaddr sa; 935 struct sockaddr_in sin; 936 struct sockaddr_in6 sin6; 937 }; 938 939 SLIST_HEAD(pfr_kentryworkq, pfr_kentry); 940 struct _pfr_kentry { 941 struct radix_node _pfrke_node[2]; 942 union pfsockaddr_union _pfrke_sa; 943 SLIST_ENTRY(pfr_kentry) _pfrke_workq; 944 SLIST_ENTRY(pfr_kentry) _pfrke_ioq; 945 struct pfr_kcounters *_pfrke_counters; 946 time_t _pfrke_tzero; 947 u_int8_t _pfrke_af; 948 u_int8_t _pfrke_net; 949 u_int8_t _pfrke_flags; 950 u_int8_t _pfrke_type; 951 u_int8_t _pfrke_fb; 952 }; 953 #define PFRKE_FLAG_NOT 0x01 954 #define PFRKE_FLAG_MARK 0x02 955 956 /* pfrke_type */ 957 enum { PFRKE_PLAIN, PFRKE_ROUTE, PFRKE_COST, PFRKE_MAX }; 958 959 struct pfr_kentry { 960 union { 961 struct _pfr_kentry _ke; 962 } u; 963 }; 964 #define pfrke_node u._ke._pfrke_node 965 #define pfrke_sa u._ke._pfrke_sa 966 #define pfrke_workq u._ke._pfrke_workq 967 #define pfrke_ioq u._ke._pfrke_ioq 968 #define pfrke_counters u._ke._pfrke_counters 969 #define pfrke_tzero u._ke._pfrke_tzero 970 #define pfrke_af u._ke._pfrke_af 971 #define pfrke_net u._ke._pfrke_net 972 #define pfrke_flags u._ke._pfrke_flags 973 #define pfrke_type u._ke._pfrke_type 974 #define pfrke_fb u._ke._pfrke_fb 975 976 struct pfr_kentry_route { 977 union { 978 struct _pfr_kentry _ke; 979 } u; 980 981 struct pfi_kif *kif; 982 char ifname[IFNAMSIZ]; 983 }; 984 985 struct pfr_kentry_cost { 986 union { 987 struct _pfr_kentry _ke; 988 } u; 989 990 struct pfi_kif *kif; 991 char ifname[IFNAMSIZ]; 992 /* Above overlaps with pfr_kentry route */ 993 994 u_int16_t weight; 995 }; 996 997 struct pfr_kentry_all { 998 union { 999 struct _pfr_kentry _ke; 1000 struct pfr_kentry_route kr; 1001 struct pfr_kentry_cost kc; 1002 } u; 1003 }; 1004 #define pfrke_rkif u.kr.kif 1005 #define pfrke_rifname u.kr.ifname 1006 1007 SLIST_HEAD(pfr_ktableworkq, pfr_ktable); 1008 RB_HEAD(pfr_ktablehead, pfr_ktable); 1009 struct pfr_ktable { 1010 struct pfr_tstats pfrkt_ts; 1011 RB_ENTRY(pfr_ktable) pfrkt_tree; 1012 SLIST_ENTRY(pfr_ktable) pfrkt_workq; 1013 struct radix_node_head *pfrkt_ip4; 1014 struct radix_node_head *pfrkt_ip6; 1015 struct pfr_ktable *pfrkt_shadow; 1016 struct pfr_ktable *pfrkt_root; 1017 struct pf_ruleset *pfrkt_rs; 1018 long pfrkt_larg; 1019 int pfrkt_nflags; 1020 u_int64_t pfrkt_refcntcost; 1021 u_int16_t pfrkt_gcdweight; 1022 u_int16_t pfrkt_maxweight; 1023 }; 1024 #define pfrkt_t pfrkt_ts.pfrts_t 1025 #define pfrkt_name pfrkt_t.pfrt_name 1026 #define pfrkt_anchor pfrkt_t.pfrt_anchor 1027 #define pfrkt_ruleset pfrkt_t.pfrt_ruleset 1028 #define pfrkt_flags pfrkt_t.pfrt_flags 1029 #define pfrkt_cnt pfrkt_ts.pfrts_cnt 1030 #define pfrkt_refcnt pfrkt_ts.pfrts_refcnt 1031 #define pfrkt_packets pfrkt_ts.pfrts_packets 1032 #define pfrkt_bytes pfrkt_ts.pfrts_bytes 1033 #define pfrkt_match pfrkt_ts.pfrts_match 1034 #define pfrkt_nomatch pfrkt_ts.pfrts_nomatch 1035 #define pfrkt_tzero pfrkt_ts.pfrts_tzero 1036 1037 RB_HEAD(pf_state_tree_ext_gwy, pf_state_key); 1038 RB_PROTOTYPE(pf_state_tree_ext_gwy, pf_state_key, 1039 entry_ext_gwy, pf_state_compare_ext_gwy) 1040 1041 RB_HEAD(pfi_ifhead, pfi_kif); 1042 1043 /* state tables */ 1044 extern struct pf_state_tree pf_statetbl; 1045 1046 /* keep synced with pfi_kif, used in RB_FIND */ 1047 struct pfi_kif_cmp { 1048 char pfik_name[IFNAMSIZ]; 1049 }; 1050 1051 struct ifnet; 1052 struct ifg_group; 1053 1054 struct pfi_kif { 1055 char pfik_name[IFNAMSIZ]; 1056 RB_ENTRY(pfi_kif) pfik_tree; 1057 u_int64_t pfik_packets[2][2][2]; 1058 u_int64_t pfik_bytes[2][2][2]; 1059 time_t pfik_tzero; 1060 int pfik_flags; 1061 int pfik_flags_new; 1062 void *pfik_ah_cookie; 1063 struct ifnet *pfik_ifp; 1064 struct ifg_group *pfik_group; 1065 int pfik_states; 1066 int pfik_rules; 1067 int pfik_routes; 1068 int pfik_srcnodes; 1069 int pfik_flagrefs; 1070 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs; 1071 }; 1072 1073 enum pfi_kif_refs { 1074 PFI_KIF_REF_NONE, 1075 PFI_KIF_REF_STATE, 1076 PFI_KIF_REF_RULE, 1077 PFI_KIF_REF_ROUTE, 1078 PFI_KIF_REF_SRCNODE, 1079 PFI_KIF_REF_FLAG 1080 }; 1081 1082 #define PFI_IFLAG_SKIP 0x0100 /* skip filtering on interface */ 1083 #define PFI_IFLAG_ANY 0x0200 /* match any non-loopback interface */ 1084 1085 /* flags for RDR options */ 1086 #define PF_DPORT_RANGE 0x01 /* Dest port uses range */ 1087 #define PF_RPORT_RANGE 0x02 /* RDR'ed port uses range */ 1088 1089 /* Reasons code for passing/dropping a packet */ 1090 #define PFRES_MATCH 0 /* Explicit match of a rule */ 1091 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */ 1092 #define PFRES_FRAG 2 /* Dropping following fragment */ 1093 #define PFRES_SHORT 3 /* Dropping short packet */ 1094 #define PFRES_NORM 4 /* Dropping by normalizer */ 1095 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */ 1096 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */ 1097 #define PFRES_CONGEST 7 /* Congestion */ 1098 #define PFRES_IPOPTIONS 8 /* IP option */ 1099 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */ 1100 #define PFRES_BADSTATE 10 /* State mismatch */ 1101 #define PFRES_STATEINS 11 /* State insertion failure */ 1102 #define PFRES_MAXSTATES 12 /* State limit */ 1103 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ 1104 #define PFRES_SYNPROXY 14 /* SYN proxy */ 1105 #define PFRES_TRANSLATE 15 /* No translation address available */ 1106 #define PFRES_NOROUTE 16 /* No route found for PBR action */ 1107 #define PFRES_MAX 17 /* total+1 */ 1108 1109 #define PFRES_NAMES { \ 1110 "match", \ 1111 "bad-offset", \ 1112 "fragment", \ 1113 "short", \ 1114 "normalize", \ 1115 "memory", \ 1116 "bad-timestamp", \ 1117 "congestion", \ 1118 "ip-option", \ 1119 "proto-cksum", \ 1120 "state-mismatch", \ 1121 "state-insert", \ 1122 "state-limit", \ 1123 "src-limit", \ 1124 "synproxy", \ 1125 "translate", \ 1126 "no-route", \ 1127 NULL \ 1128 } 1129 1130 /* Counters for other things we want to keep track of */ 1131 #define LCNT_STATES 0 /* states */ 1132 #define LCNT_SRCSTATES 1 /* max-src-states */ 1133 #define LCNT_SRCNODES 2 /* max-src-nodes */ 1134 #define LCNT_SRCCONN 3 /* max-src-conn */ 1135 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */ 1136 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */ 1137 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */ 1138 #define LCNT_SYNFLOODS 7 /* synfloods detected */ 1139 #define LCNT_SYNCOOKIES_SENT 8 /* syncookies sent */ 1140 #define LCNT_SYNCOOKIES_VALID 9 /* syncookies validated */ 1141 #define LCNT_MAX 10 /* total+1 */ 1142 1143 #define LCNT_NAMES { \ 1144 "max states per rule", \ 1145 "max-src-states", \ 1146 "max-src-nodes", \ 1147 "max-src-conn", \ 1148 "max-src-conn-rate", \ 1149 "overload table insertion", \ 1150 "overload flush states", \ 1151 "synfloods detected", \ 1152 "syncookies sent", \ 1153 "syncookies validated", \ 1154 NULL \ 1155 } 1156 1157 /* UDP state enumeration */ 1158 #define PFUDPS_NO_TRAFFIC 0 1159 #define PFUDPS_SINGLE 1 1160 #define PFUDPS_MULTIPLE 2 1161 1162 #define PFUDPS_NSTATES 3 /* number of state levels */ 1163 1164 #define PFUDPS_NAMES { \ 1165 "NO_TRAFFIC", \ 1166 "SINGLE", \ 1167 "MULTIPLE", \ 1168 NULL \ 1169 } 1170 1171 /* Other protocol state enumeration */ 1172 #define PFOTHERS_NO_TRAFFIC 0 1173 #define PFOTHERS_SINGLE 1 1174 #define PFOTHERS_MULTIPLE 2 1175 1176 #define PFOTHERS_NSTATES 3 /* number of state levels */ 1177 1178 #define PFOTHERS_NAMES { \ 1179 "NO_TRAFFIC", \ 1180 "SINGLE", \ 1181 "MULTIPLE", \ 1182 NULL \ 1183 } 1184 1185 #define FCNT_STATE_SEARCH 0 1186 #define FCNT_STATE_INSERT 1 1187 #define FCNT_STATE_REMOVALS 2 1188 #define FCNT_MAX 3 1189 1190 #define SCNT_SRC_NODE_SEARCH 0 1191 #define SCNT_SRC_NODE_INSERT 1 1192 #define SCNT_SRC_NODE_REMOVALS 2 1193 #define SCNT_MAX 3 1194 1195 #define NCNT_FRAG_SEARCH 0 1196 #define NCNT_FRAG_INSERT 1 1197 #define NCNT_FRAG_REMOVALS 2 1198 #define NCNT_MAX 3 1199 1200 #define REASON_SET(a, x) \ 1201 do { \ 1202 if ((void *)(a) != NULL) { \ 1203 *(a) = (x); \ 1204 if (x < PFRES_MAX) \ 1205 pf_status.counters[x]++; \ 1206 } \ 1207 } while (0) 1208 1209 struct pf_status { 1210 u_int64_t counters[PFRES_MAX]; 1211 u_int64_t lcounters[LCNT_MAX]; /* limit counters */ 1212 u_int64_t fcounters[FCNT_MAX]; 1213 u_int64_t scounters[SCNT_MAX]; 1214 u_int64_t ncounters[NCNT_MAX]; 1215 u_int64_t pcounters[2][2][3]; 1216 u_int64_t bcounters[2][2]; 1217 u_int64_t stateid; 1218 u_int64_t syncookies_inflight[2]; /* unACKed SYNcookies */ 1219 time_t since; 1220 u_int32_t running; 1221 u_int32_t states; 1222 u_int32_t states_halfopen; 1223 u_int32_t src_nodes; 1224 u_int32_t fragments; 1225 u_int32_t debug; 1226 u_int32_t hostid; 1227 u_int32_t reass; /* reassembly */ 1228 u_int8_t syncookies_active; 1229 u_int8_t syncookies_mode; /* never/always/adaptive */ 1230 u_int8_t pad[2]; 1231 char ifname[IFNAMSIZ]; 1232 u_int8_t pf_chksum[PF_MD5_DIGEST_LENGTH]; 1233 }; 1234 1235 #define PF_REASS_ENABLED 0x01 1236 #define PF_REASS_NODF 0x02 1237 1238 #define PF_SYNCOOKIES_NEVER 0 1239 #define PF_SYNCOOKIES_ALWAYS 1 1240 #define PF_SYNCOOKIES_ADAPTIVE 2 1241 #define PF_SYNCOOKIES_MODE_MAX PF_SYNCOOKIES_ADAPTIVE 1242 1243 #define PF_SYNCOOKIES_HIWATPCT 25 1244 #define PF_SYNCOOKIES_LOWATPCT PF_SYNCOOKIES_HIWATPCT/2 1245 1246 #define PF_PRIO_ZERO 0xff /* match "prio 0" packets */ 1247 1248 struct pf_queue_bwspec { 1249 u_int absolute; 1250 u_int percent; 1251 }; 1252 1253 struct pf_queue_scspec { 1254 struct pf_queue_bwspec m1; 1255 struct pf_queue_bwspec m2; 1256 u_int d; 1257 }; 1258 1259 struct pf_queue_fqspec { 1260 u_int flows; 1261 u_int quantum; 1262 u_int target; 1263 u_int interval; 1264 }; 1265 1266 struct pf_queuespec { 1267 TAILQ_ENTRY(pf_queuespec) entries; 1268 char qname[PF_QNAME_SIZE]; 1269 char parent[PF_QNAME_SIZE]; 1270 char ifname[IFNAMSIZ]; 1271 struct pf_queue_scspec realtime; 1272 struct pf_queue_scspec linkshare; 1273 struct pf_queue_scspec upperlimit; 1274 struct pf_queue_fqspec flowqueue; 1275 struct pfi_kif *kif; 1276 u_int flags; 1277 u_int qlimit; 1278 u_int32_t qid; 1279 u_int32_t parent_qid; 1280 }; 1281 1282 #define PFQS_FLOWQUEUE 0x0001 1283 #define PFQS_ROOTCLASS 0x0002 1284 #define PFQS_DEFAULT 0x1000 /* maps to HFSC_DEFAULTCLASS */ 1285 1286 struct priq_opts { 1287 int flags; 1288 }; 1289 1290 struct hfsc_opts { 1291 /* real-time service curve */ 1292 u_int rtsc_m1; /* slope of the 1st segment in bps */ 1293 u_int rtsc_d; /* the x-projection of m1 in msec */ 1294 u_int rtsc_m2; /* slope of the 2nd segment in bps */ 1295 /* link-sharing service curve */ 1296 u_int lssc_m1; 1297 u_int lssc_d; 1298 u_int lssc_m2; 1299 /* upper-limit service curve */ 1300 u_int ulsc_m1; 1301 u_int ulsc_d; 1302 u_int ulsc_m2; 1303 int flags; 1304 }; 1305 1306 struct pfq_ops { 1307 void * (*pfq_alloc)(struct ifnet *); 1308 int (*pfq_addqueue)(void *, struct pf_queuespec *); 1309 void (*pfq_free)(void *); 1310 int (*pfq_qstats)(struct pf_queuespec *, void *, int *); 1311 /* Queue manager ops */ 1312 unsigned int (*pfq_qlength)(void *); 1313 struct mbuf * (*pfq_enqueue)(void *, struct mbuf *); 1314 struct mbuf * (*pfq_deq_begin)(void *, void **, struct mbuf_list *); 1315 void (*pfq_deq_commit)(void *, struct mbuf *, void *); 1316 void (*pfq_purge)(void *, struct mbuf_list *); 1317 }; 1318 1319 struct pf_tagname { 1320 TAILQ_ENTRY(pf_tagname) entries; 1321 char name[PF_TAG_NAME_SIZE]; 1322 u_int16_t tag; 1323 int ref; 1324 }; 1325 1326 struct pf_divert { 1327 struct pf_addr addr; 1328 u_int16_t port; 1329 u_int16_t rdomain; 1330 u_int8_t type; 1331 }; 1332 1333 enum pf_divert_types { 1334 PF_DIVERT_NONE, 1335 PF_DIVERT_TO, 1336 PF_DIVERT_REPLY, 1337 PF_DIVERT_PACKET 1338 }; 1339 1340 struct pf_pktdelay { 1341 struct timeout to; 1342 struct mbuf *m; 1343 u_int ifidx; 1344 }; 1345 1346 /* Fragment entries reference mbuf clusters, so base the default on that. */ 1347 #define PFFRAG_FRENT_HIWAT (NMBCLUSTERS / 16) /* Number of entries */ 1348 #define PFFRAG_FRAG_HIWAT (NMBCLUSTERS / 32) /* Number of packets */ 1349 1350 #define PFR_KTABLE_HIWAT 1000 /* Number of tables */ 1351 #define PFR_KENTRY_HIWAT 200000 /* Number of table entries */ 1352 #define PFR_KENTRY_HIWAT_SMALL 100000 /* Number of entries for tiny hosts */ 1353 1354 /* 1355 * ioctl parameter structures 1356 */ 1357 1358 struct pfioc_rule { 1359 u_int32_t action; 1360 u_int32_t ticket; 1361 u_int32_t nr; 1362 char anchor[PATH_MAX]; 1363 char anchor_call[PATH_MAX]; 1364 struct pf_rule rule; 1365 }; 1366 1367 struct pfioc_natlook { 1368 struct pf_addr saddr; 1369 struct pf_addr daddr; 1370 struct pf_addr rsaddr; 1371 struct pf_addr rdaddr; 1372 u_int16_t rdomain; 1373 u_int16_t rrdomain; 1374 u_int16_t sport; 1375 u_int16_t dport; 1376 u_int16_t rsport; 1377 u_int16_t rdport; 1378 sa_family_t af; 1379 u_int8_t proto; 1380 u_int8_t direction; 1381 }; 1382 1383 struct pfioc_state { 1384 struct pfsync_state state; 1385 }; 1386 1387 struct pfioc_src_node_kill { 1388 sa_family_t psnk_af; 1389 struct pf_rule_addr psnk_src; 1390 struct pf_rule_addr psnk_dst; 1391 u_int psnk_killed; 1392 }; 1393 1394 struct pfioc_state_kill { 1395 struct pf_state_cmp psk_pfcmp; 1396 sa_family_t psk_af; 1397 int psk_proto; 1398 struct pf_rule_addr psk_src; 1399 struct pf_rule_addr psk_dst; 1400 char psk_ifname[IFNAMSIZ]; 1401 char psk_label[PF_RULE_LABEL_SIZE]; 1402 u_int psk_killed; 1403 u_int16_t psk_rdomain; 1404 }; 1405 1406 struct pfioc_states { 1407 size_t ps_len; 1408 union { 1409 caddr_t psu_buf; 1410 struct pfsync_state *psu_states; 1411 } ps_u; 1412 #define ps_buf ps_u.psu_buf 1413 #define ps_states ps_u.psu_states 1414 }; 1415 1416 struct pfioc_src_nodes { 1417 size_t psn_len; 1418 union { 1419 caddr_t psu_buf; 1420 struct pf_src_node *psu_src_nodes; 1421 } psn_u; 1422 #define psn_buf psn_u.psu_buf 1423 #define psn_src_nodes psn_u.psu_src_nodes 1424 }; 1425 1426 struct pfioc_tm { 1427 int timeout; 1428 int seconds; 1429 }; 1430 1431 struct pfioc_limit { 1432 int index; 1433 unsigned limit; 1434 }; 1435 1436 struct pfioc_ruleset { 1437 u_int32_t nr; 1438 char path[PATH_MAX]; 1439 char name[PF_ANCHOR_NAME_SIZE]; 1440 }; 1441 1442 struct pfioc_trans { 1443 int size; /* number of elements */ 1444 int esize; /* size of each element in bytes */ 1445 struct pfioc_trans_e { 1446 int type; 1447 char anchor[PATH_MAX]; 1448 u_int32_t ticket; 1449 } *array; 1450 }; 1451 1452 struct pfioc_queue { 1453 u_int32_t ticket; 1454 u_int nr; 1455 struct pf_queuespec queue; 1456 }; 1457 1458 struct pfioc_qstats { 1459 u_int32_t ticket; 1460 u_int32_t nr; 1461 struct pf_queuespec queue; 1462 void *buf; 1463 int nbytes; 1464 }; 1465 1466 #define PFR_FLAG_DUMMY 0x00000002 1467 #define PFR_FLAG_FEEDBACK 0x00000004 1468 #define PFR_FLAG_CLSTATS 0x00000008 1469 #define PFR_FLAG_ADDRSTOO 0x00000010 1470 #define PFR_FLAG_REPLACE 0x00000020 1471 #define PFR_FLAG_ALLRSETS 0x00000040 1472 #define PFR_FLAG_ALLMASK 0x0000007F 1473 #ifdef _KERNEL 1474 #define PFR_FLAG_USERIOCTL 0x10000000 1475 #endif 1476 1477 struct pfioc_table { 1478 struct pfr_table pfrio_table; 1479 void *pfrio_buffer; 1480 int pfrio_esize; 1481 int pfrio_size; 1482 int pfrio_size2; 1483 int pfrio_nadd; 1484 int pfrio_ndel; 1485 int pfrio_nchange; 1486 int pfrio_flags; 1487 u_int32_t pfrio_ticket; 1488 }; 1489 #define pfrio_exists pfrio_nadd 1490 #define pfrio_nzero pfrio_nadd 1491 #define pfrio_nmatch pfrio_nadd 1492 #define pfrio_naddr pfrio_size2 1493 #define pfrio_setflag pfrio_size2 1494 #define pfrio_clrflag pfrio_nadd 1495 1496 struct pfioc_iface { 1497 char pfiio_name[IFNAMSIZ]; 1498 void *pfiio_buffer; 1499 int pfiio_esize; 1500 int pfiio_size; 1501 int pfiio_nzero; 1502 int pfiio_flags; 1503 }; 1504 1505 struct pfioc_synflwats { 1506 u_int32_t hiwat; 1507 u_int32_t lowat; 1508 }; 1509 1510 /* 1511 * ioctl operations 1512 */ 1513 1514 #define DIOCSTART _IO ('D', 1) 1515 #define DIOCSTOP _IO ('D', 2) 1516 #define DIOCADDRULE _IOWR('D', 4, struct pfioc_rule) 1517 #define DIOCGETRULES _IOWR('D', 6, struct pfioc_rule) 1518 #define DIOCGETRULE _IOWR('D', 7, struct pfioc_rule) 1519 /* cut 8 - 17 */ 1520 #define DIOCCLRSTATES _IOWR('D', 18, struct pfioc_state_kill) 1521 #define DIOCGETSTATE _IOWR('D', 19, struct pfioc_state) 1522 #define DIOCSETSTATUSIF _IOWR('D', 20, struct pfioc_iface) 1523 #define DIOCGETSTATUS _IOWR('D', 21, struct pf_status) 1524 #define DIOCCLRSTATUS _IOWR('D', 22, struct pfioc_iface) 1525 #define DIOCNATLOOK _IOWR('D', 23, struct pfioc_natlook) 1526 #define DIOCSETDEBUG _IOWR('D', 24, u_int32_t) 1527 #define DIOCGETSTATES _IOWR('D', 25, struct pfioc_states) 1528 #define DIOCCHANGERULE _IOWR('D', 26, struct pfioc_rule) 1529 /* cut 27 - 28 */ 1530 #define DIOCSETTIMEOUT _IOWR('D', 29, struct pfioc_tm) 1531 #define DIOCGETTIMEOUT _IOWR('D', 30, struct pfioc_tm) 1532 #define DIOCADDSTATE _IOWR('D', 37, struct pfioc_state) 1533 /* cut 38 */ 1534 #define DIOCGETLIMIT _IOWR('D', 39, struct pfioc_limit) 1535 #define DIOCSETLIMIT _IOWR('D', 40, struct pfioc_limit) 1536 #define DIOCKILLSTATES _IOWR('D', 41, struct pfioc_state_kill) 1537 /* cut 42 - 57 */ 1538 #define DIOCGETRULESETS _IOWR('D', 58, struct pfioc_ruleset) 1539 #define DIOCGETRULESET _IOWR('D', 59, struct pfioc_ruleset) 1540 #define DIOCRCLRTABLES _IOWR('D', 60, struct pfioc_table) 1541 #define DIOCRADDTABLES _IOWR('D', 61, struct pfioc_table) 1542 #define DIOCRDELTABLES _IOWR('D', 62, struct pfioc_table) 1543 #define DIOCRGETTABLES _IOWR('D', 63, struct pfioc_table) 1544 #define DIOCRGETTSTATS _IOWR('D', 64, struct pfioc_table) 1545 #define DIOCRCLRTSTATS _IOWR('D', 65, struct pfioc_table) 1546 #define DIOCRCLRADDRS _IOWR('D', 66, struct pfioc_table) 1547 #define DIOCRADDADDRS _IOWR('D', 67, struct pfioc_table) 1548 #define DIOCRDELADDRS _IOWR('D', 68, struct pfioc_table) 1549 #define DIOCRSETADDRS _IOWR('D', 69, struct pfioc_table) 1550 #define DIOCRGETADDRS _IOWR('D', 70, struct pfioc_table) 1551 #define DIOCRGETASTATS _IOWR('D', 71, struct pfioc_table) 1552 #define DIOCRCLRASTATS _IOWR('D', 72, struct pfioc_table) 1553 #define DIOCRTSTADDRS _IOWR('D', 73, struct pfioc_table) 1554 #define DIOCRSETTFLAGS _IOWR('D', 74, struct pfioc_table) 1555 #define DIOCRINADEFINE _IOWR('D', 77, struct pfioc_table) 1556 #define DIOCOSFPFLUSH _IO('D', 78) 1557 #define DIOCOSFPADD _IOWR('D', 79, struct pf_osfp_ioctl) 1558 #define DIOCOSFPGET _IOWR('D', 80, struct pf_osfp_ioctl) 1559 #define DIOCXBEGIN _IOWR('D', 81, struct pfioc_trans) 1560 #define DIOCXCOMMIT _IOWR('D', 82, struct pfioc_trans) 1561 #define DIOCXROLLBACK _IOWR('D', 83, struct pfioc_trans) 1562 #define DIOCGETSRCNODES _IOWR('D', 84, struct pfioc_src_nodes) 1563 #define DIOCCLRSRCNODES _IO('D', 85) 1564 #define DIOCSETHOSTID _IOWR('D', 86, u_int32_t) 1565 #define DIOCIGETIFACES _IOWR('D', 87, struct pfioc_iface) 1566 #define DIOCSETIFFLAG _IOWR('D', 89, struct pfioc_iface) 1567 #define DIOCCLRIFFLAG _IOWR('D', 90, struct pfioc_iface) 1568 #define DIOCKILLSRCNODES _IOWR('D', 91, struct pfioc_src_node_kill) 1569 #define DIOCSETREASS _IOWR('D', 92, u_int32_t) 1570 #define DIOCADDQUEUE _IOWR('D', 93, struct pfioc_queue) 1571 #define DIOCGETQUEUES _IOWR('D', 94, struct pfioc_queue) 1572 #define DIOCGETQUEUE _IOWR('D', 95, struct pfioc_queue) 1573 #define DIOCGETQSTATS _IOWR('D', 96, struct pfioc_qstats) 1574 #define DIOCSETSYNFLWATS _IOWR('D', 97, struct pfioc_synflwats) 1575 #define DIOCSETSYNCOOKIES _IOWR('D', 98, u_int8_t) 1576 #define DIOCGETSYNFLWATS _IOWR('D', 99, struct pfioc_synflwats) 1577 #define DIOCXEND _IOWR('D', 100, u_int32_t) 1578 1579 #ifdef _KERNEL 1580 1581 struct pf_pdesc; 1582 1583 RB_HEAD(pf_src_tree, pf_src_node); 1584 RB_PROTOTYPE(pf_src_tree, pf_src_node, entry, pf_src_compare); 1585 extern struct pf_src_tree tree_src_tracking; 1586 1587 extern struct pf_state_list pf_state_list; 1588 1589 TAILQ_HEAD(pf_queuehead, pf_queuespec); 1590 extern struct pf_queuehead pf_queues[2]; 1591 extern struct pf_queuehead *pf_queues_active, *pf_queues_inactive; 1592 1593 extern struct pool pf_src_tree_pl, pf_sn_item_pl, pf_rule_pl; 1594 extern struct pool pf_state_pl, pf_state_key_pl, pf_state_item_pl, 1595 pf_rule_item_pl, pf_queue_pl, 1596 pf_pktdelay_pl, pf_anchor_pl; 1597 extern struct pool pf_state_scrub_pl; 1598 extern struct pf_rule pf_default_rule; 1599 1600 extern int pf_tbladdr_setup(struct pf_ruleset *, 1601 struct pf_addr_wrap *, int); 1602 extern void pf_tbladdr_remove(struct pf_addr_wrap *); 1603 extern void pf_tbladdr_copyout(struct pf_addr_wrap *); 1604 extern void pf_calc_skip_steps(struct pf_rulequeue *); 1605 extern void pf_purge_expired_src_nodes(void); 1606 extern void pf_remove_state(struct pf_state *); 1607 extern void pf_remove_divert_state(struct inpcb *); 1608 extern void pf_free_state(struct pf_state *); 1609 int pf_insert_src_node(struct pf_src_node **, 1610 struct pf_rule *, enum pf_sn_types, 1611 sa_family_t, struct pf_addr *, 1612 struct pf_addr *, struct pfi_kif *); 1613 void pf_remove_src_node(struct pf_src_node *); 1614 struct pf_src_node *pf_get_src_node(struct pf_state *, 1615 enum pf_sn_types); 1616 void pf_src_tree_remove_state(struct pf_state *); 1617 void pf_state_rm_src_node(struct pf_state *, 1618 struct pf_src_node *); 1619 1620 extern struct pf_state *pf_find_state_byid(struct pf_state_cmp *); 1621 extern struct pf_state *pf_find_state_all(struct pf_state_key_cmp *, 1622 u_int, int *); 1623 extern void pf_state_export(struct pfsync_state *, 1624 struct pf_state *); 1625 int pf_state_import(const struct pfsync_state *, 1626 int); 1627 int pf_state_alloc_scrub_memory( 1628 const struct pfsync_state_peer *, 1629 struct pf_state_peer *); 1630 extern void pf_print_state(struct pf_state *); 1631 extern void pf_print_flags(u_int8_t); 1632 extern void pf_addrcpy(struct pf_addr *, struct pf_addr *, 1633 sa_family_t); 1634 extern void pf_cksum_fixup(u_int16_t *, u_int16_t, 1635 u_int16_t, u_int8_t); 1636 void pf_rm_rule(struct pf_rulequeue *, 1637 struct pf_rule *); 1638 struct pf_divert *pf_find_divert(struct mbuf *); 1639 int pf_setup_pdesc(struct pf_pdesc *, sa_family_t, 1640 int, struct pfi_kif *, struct mbuf *, 1641 u_short *); 1642 1643 int pf_test(sa_family_t, int, struct ifnet *, struct mbuf **); 1644 1645 void pf_poolmask(struct pf_addr *, struct pf_addr*, 1646 struct pf_addr *, struct pf_addr *, sa_family_t); 1647 void pf_addr_inc(struct pf_addr *, sa_family_t); 1648 1649 void *pf_pull_hdr(struct mbuf *, int, void *, int, u_short *, sa_family_t); 1650 #define PF_HI (true) 1651 #define PF_LO (!PF_HI) 1652 #define PF_ALGNMNT(off) (((off) % 2) == 0 ? PF_HI : PF_LO) 1653 int pf_patch_8(struct pf_pdesc *, u_int8_t *, u_int8_t, bool); 1654 int pf_patch_16(struct pf_pdesc *, u_int16_t *, u_int16_t); 1655 int pf_patch_16_unaligned(struct pf_pdesc *, void *, u_int16_t, bool); 1656 int pf_patch_32(struct pf_pdesc *, u_int32_t *, u_int32_t); 1657 int pf_patch_32_unaligned(struct pf_pdesc *, void *, u_int32_t, bool); 1658 int pflog_packet(struct pf_pdesc *, u_int8_t, struct pf_rule *, 1659 struct pf_rule *, struct pf_ruleset *, struct pf_rule *); 1660 int pf_match_addr(u_int8_t, struct pf_addr *, struct pf_addr *, 1661 struct pf_addr *, sa_family_t); 1662 int pf_match_addr_range(struct pf_addr *, struct pf_addr *, 1663 struct pf_addr *, sa_family_t); 1664 int pf_match(u_int8_t, u_int32_t, u_int32_t, u_int32_t); 1665 int pf_match_port(u_int8_t, u_int16_t, u_int16_t, u_int16_t); 1666 int pf_match_uid(u_int8_t, uid_t, uid_t, uid_t); 1667 int pf_match_gid(u_int8_t, gid_t, gid_t, gid_t); 1668 1669 struct pf_state_scrub * 1670 pf_state_scrub_get(void); 1671 void pf_state_scrub_put(struct pf_state_scrub *); 1672 1673 int pf_refragment6(struct mbuf **, struct m_tag *mtag, 1674 struct sockaddr_in6 *, struct ifnet *, struct rtentry *); 1675 void pf_normalize_init(void); 1676 int pf_normalize_ip(struct pf_pdesc *, u_short *); 1677 int pf_normalize_ip6(struct pf_pdesc *, u_short *); 1678 int pf_normalize_tcp(struct pf_pdesc *); 1679 void pf_normalize_tcp_cleanup(struct pf_state *); 1680 int pf_normalize_tcp_init(struct pf_pdesc *, struct pf_state_peer *); 1681 int pf_normalize_tcp_alloc(struct pf_state_peer *); 1682 int pf_normalize_tcp_stateful(struct pf_pdesc *, u_short *, 1683 struct pf_state *, struct pf_state_peer *, struct pf_state_peer *, 1684 int *); 1685 int pf_normalize_mss(struct pf_pdesc *, u_int16_t); 1686 void pf_scrub(struct mbuf *, u_int16_t, sa_family_t, u_int8_t, u_int8_t); 1687 void pf_purge_expired_fragments(void); 1688 int pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *, 1689 int); 1690 int pf_rtlabel_match(struct pf_addr *, sa_family_t, struct pf_addr_wrap *, 1691 int); 1692 int pf_socket_lookup(struct pf_pdesc *); 1693 struct pf_state_key *pf_alloc_state_key(int); 1694 int pf_ouraddr(struct mbuf *); 1695 void pf_pkt_addr_changed(struct mbuf *); 1696 struct inpcb *pf_inp_lookup(struct mbuf *); 1697 void pf_inp_link(struct mbuf *, struct inpcb *); 1698 void pf_inp_unlink(struct inpcb *); 1699 int pf_translate(struct pf_pdesc *, struct pf_addr *, u_int16_t, 1700 struct pf_addr *, u_int16_t, u_int16_t, int); 1701 int pf_translate_af(struct pf_pdesc *); 1702 void pf_route(struct pf_pdesc *, struct pf_state *); 1703 void pf_route6(struct pf_pdesc *, struct pf_state *); 1704 void pf_init_threshold(struct pf_threshold *, u_int32_t, u_int32_t); 1705 int pf_delay_pkt(struct mbuf *, u_int); 1706 1707 void pfr_initialize(void); 1708 int pfr_match_addr(struct pfr_ktable *, struct pf_addr *, sa_family_t); 1709 void pfr_update_stats(struct pfr_ktable *, struct pf_addr *, 1710 struct pf_pdesc *, int, int); 1711 int pfr_pool_get(struct pf_pool *, struct pf_addr **, 1712 struct pf_addr **, sa_family_t); 1713 int pfr_states_increase(struct pfr_ktable *, struct pf_addr *, int); 1714 int pfr_states_decrease(struct pfr_ktable *, struct pf_addr *, int); 1715 struct pfr_kentry * 1716 pfr_kentry_byaddr(struct pfr_ktable *, struct pf_addr *, sa_family_t, 1717 int); 1718 void pfr_dynaddr_update(struct pfr_ktable *, struct pfi_dynaddr *); 1719 struct pfr_ktable * 1720 pfr_attach_table(struct pf_ruleset *, char *, int); 1721 void pfr_detach_table(struct pfr_ktable *); 1722 int pfr_clr_tables(struct pfr_table *, int *, int); 1723 int pfr_add_tables(struct pfr_table *, int, int *, int); 1724 int pfr_del_tables(struct pfr_table *, int, int *, int); 1725 int pfr_get_tables(struct pfr_table *, struct pfr_table *, int *, int); 1726 int pfr_get_tstats(struct pfr_table *, struct pfr_tstats *, int *, int); 1727 int pfr_clr_tstats(struct pfr_table *, int, int *, int); 1728 int pfr_set_tflags(struct pfr_table *, int, int, int, int *, int *, int); 1729 int pfr_clr_addrs(struct pfr_table *, int *, int); 1730 int pfr_insert_kentry(struct pfr_ktable *, struct pfr_addr *, time_t); 1731 int pfr_add_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1732 int); 1733 int pfr_del_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1734 int); 1735 int pfr_set_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1736 int *, int *, int *, int, u_int32_t); 1737 int pfr_get_addrs(struct pfr_table *, struct pfr_addr *, int *, int); 1738 int pfr_get_astats(struct pfr_table *, struct pfr_astats *, int *, int); 1739 int pfr_clr_astats(struct pfr_table *, struct pfr_addr *, int, int *, 1740 int); 1741 int pfr_tst_addrs(struct pfr_table *, struct pfr_addr *, int, int *, 1742 int); 1743 int pfr_ina_begin(struct pfr_table *, u_int32_t *, int *, int); 1744 int pfr_ina_rollback(struct pfr_table *, u_int32_t, int *, int); 1745 int pfr_ina_commit(struct pfr_table *, u_int32_t, int *, int *, int); 1746 int pfr_ina_define(struct pfr_table *, struct pfr_addr *, int, int *, 1747 int *, u_int32_t, int); 1748 struct pfr_ktable 1749 *pfr_ktable_select_active(struct pfr_ktable *); 1750 1751 extern struct pfi_kif *pfi_all; 1752 1753 void pfi_initialize(void); 1754 struct pfi_kif *pfi_kif_alloc(const char *, int); 1755 void pfi_kif_free(struct pfi_kif *); 1756 struct pfi_kif *pfi_kif_find(const char *); 1757 struct pfi_kif *pfi_kif_get(const char *, struct pfi_kif **); 1758 void pfi_kif_ref(struct pfi_kif *, enum pfi_kif_refs); 1759 void pfi_kif_unref(struct pfi_kif *, enum pfi_kif_refs); 1760 int pfi_kif_match(struct pfi_kif *, struct pfi_kif *); 1761 void pfi_attach_ifnet(struct ifnet *); 1762 void pfi_detach_ifnet(struct ifnet *); 1763 void pfi_attach_ifgroup(struct ifg_group *); 1764 void pfi_detach_ifgroup(struct ifg_group *); 1765 void pfi_group_addmember(const char *); 1766 void pfi_group_delmember(const char *); 1767 int pfi_match_addr(struct pfi_dynaddr *, struct pf_addr *, 1768 sa_family_t); 1769 int pfi_dynaddr_setup(struct pf_addr_wrap *, sa_family_t, int); 1770 void pfi_dynaddr_remove(struct pf_addr_wrap *); 1771 void pfi_dynaddr_copyout(struct pf_addr_wrap *); 1772 void pfi_update_status(const char *, struct pf_status *); 1773 void pfi_get_ifaces(const char *, struct pfi_kif *, int *); 1774 int pfi_set_flags(const char *, int); 1775 int pfi_clear_flags(const char *, int); 1776 void pfi_xcommit(void); 1777 1778 int pf_match_tag(struct mbuf *, struct pf_rule *, int *); 1779 u_int16_t pf_tagname2tag(char *, int); 1780 void pf_tag2tagname(u_int16_t, char *); 1781 void pf_tag_ref(u_int16_t); 1782 void pf_tag_unref(u_int16_t); 1783 void pf_tag_packet(struct mbuf *, int, int); 1784 int pf_addr_compare(const struct pf_addr *, 1785 const struct pf_addr *, sa_family_t); 1786 1787 const struct pfq_ops 1788 *pf_queue_manager(struct pf_queuespec *); 1789 1790 extern struct pf_status pf_status; 1791 extern struct pool pf_frent_pl, pf_frag_pl; 1792 1793 /* 1794 * Protection/ownership of pf_pool_limit: 1795 * I immutable after pfattach() 1796 * p pf_lock 1797 */ 1798 1799 struct pf_pool_limit { 1800 void *pp; /* [I] */ 1801 unsigned limit; /* [p] */ 1802 unsigned limit_new; /* [p] */ 1803 }; 1804 extern struct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX]; 1805 1806 #endif /* _KERNEL */ 1807 1808 extern struct pf_anchor_global pf_anchors; 1809 extern struct pf_anchor pf_main_anchor; 1810 #define pf_main_ruleset pf_main_anchor.ruleset 1811 1812 struct tcphdr; 1813 1814 /* these ruleset functions can be linked into userland programs (pfctl) */ 1815 void pf_init_ruleset(struct pf_ruleset *); 1816 int pf_anchor_setup(struct pf_rule *, 1817 const struct pf_ruleset *, const char *); 1818 int pf_anchor_copyout(const struct pf_ruleset *, 1819 const struct pf_rule *, struct pfioc_rule *); 1820 void pf_remove_anchor(struct pf_rule *); 1821 void pf_remove_if_empty_ruleset(struct pf_ruleset *); 1822 struct pf_anchor *pf_find_anchor(const char *); 1823 struct pf_ruleset *pf_find_ruleset(const char *); 1824 struct pf_ruleset *pf_get_leaf_ruleset(char *, char **); 1825 struct pf_anchor *pf_create_anchor(struct pf_anchor *, const char *); 1826 struct pf_ruleset *pf_find_or_create_ruleset(const char *); 1827 void pf_anchor_rele(struct pf_anchor *); 1828 struct pf_anchor *pf_anchor_take(struct pf_anchor *); 1829 1830 /* The fingerprint functions can be linked into userland programs (tcpdump) */ 1831 int pf_osfp_add(struct pf_osfp_ioctl *); 1832 #ifdef _KERNEL 1833 struct pf_osfp_enlist * 1834 pf_osfp_fingerprint(struct pf_pdesc *); 1835 #endif /* _KERNEL */ 1836 struct pf_osfp_enlist * 1837 pf_osfp_fingerprint_hdr(const struct ip *, const struct ip6_hdr *, 1838 const struct tcphdr *); 1839 void pf_osfp_flush(void); 1840 int pf_osfp_get(struct pf_osfp_ioctl *); 1841 void pf_osfp_initialize(void); 1842 int pf_osfp_match(struct pf_osfp_enlist *, pf_osfp_t); 1843 struct pf_os_fingerprint * 1844 pf_osfp_validate(void); 1845 1846 #ifdef _KERNEL 1847 void pf_print_host(struct pf_addr *, u_int16_t, 1848 sa_family_t); 1849 int pf_get_transaddr(struct pf_rule *, struct pf_pdesc *, 1850 struct pf_src_node **, struct pf_rule **); 1851 int pf_map_addr(sa_family_t, struct pf_rule *, 1852 struct pf_addr *, struct pf_addr *, 1853 struct pf_addr *, struct pf_src_node **, 1854 struct pf_pool *, enum pf_sn_types); 1855 int pf_postprocess_addr(struct pf_state *); 1856 1857 void pf_mbuf_link_state_key(struct mbuf *, 1858 struct pf_state_key *); 1859 void pf_mbuf_unlink_state_key(struct mbuf *); 1860 void pf_mbuf_link_inpcb(struct mbuf *, struct inpcb *); 1861 void pf_mbuf_unlink_inpcb(struct mbuf *); 1862 1863 u_int8_t* pf_find_tcpopt(u_int8_t *, u_int8_t *, size_t, 1864 u_int8_t, u_int8_t); 1865 u_int8_t pf_get_wscale(struct pf_pdesc *); 1866 u_int16_t pf_get_mss(struct pf_pdesc *); 1867 struct mbuf * pf_build_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, u_int); 1872 void pf_send_tcp(const struct pf_rule *, sa_family_t, 1873 const struct pf_addr *, const struct pf_addr *, 1874 u_int16_t, u_int16_t, u_int32_t, u_int32_t, 1875 u_int8_t, u_int16_t, u_int16_t, u_int8_t, int, 1876 u_int16_t, u_int); 1877 void pf_syncookies_init(void); 1878 int pf_syncookies_setmode(u_int8_t); 1879 int pf_syncookies_setwats(u_int32_t, u_int32_t); 1880 int pf_syncookies_getwats(struct pfioc_synflwats *); 1881 int pf_synflood_check(struct pf_pdesc *); 1882 void pf_syncookie_send(struct pf_pdesc *); 1883 u_int8_t pf_syncookie_validate(struct pf_pdesc *); 1884 struct mbuf * pf_syncookie_recreate_syn(struct pf_pdesc *); 1885 #endif /* _KERNEL */ 1886 1887 #endif /* _NET_PFVAR_H_ */ 1888