Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_fw.h
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD: releng/8.3/sys/netinet/ip_fw.h 230575 2012-01-26 10:33:19Z ae $ 26 */ 27 28 #ifndef _IPFW2_H 29 #define _IPFW2_H 30 31 /* 32 * The default rule number. By the design of ip_fw, the default rule 33 * is the last one, so its number can also serve as the highest number 34 * allowed for a rule. The ip_fw code relies on both meanings of this 35 * constant. 36 */ 37 #define IPFW_DEFAULT_RULE 65535 38 39 /* 40 * The number of ipfw tables. The maximum allowed table number is the 41 * (IPFW_TABLES_MAX - 1). 42 */ 43 #define IPFW_TABLES_MAX 128 44 45 /* 46 * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit 47 * argument between 1 and 65534. The value 0 is unused, the value 48 * 65535 (IP_FW_TABLEARG) is used to represent 'tablearg', i.e. the 49 * can be 1..65534, or 65535 to indicate the use of a 'tablearg' 50 * result of the most recent table() lookup. 51 * Note that 16bit is only a historical limit, resulting from 52 * the use of a 16-bit fields for that value. In reality, we can have 53 * 2^32 pipes, queues, tag values and so on, and use 0 as a tablearg. 54 */ 55 #define IPFW_ARG_MIN 1 56 #define IPFW_ARG_MAX 65534 57 #define IP_FW_TABLEARG 65535 /* XXX should use 0 */ 58 59 /* 60 * Number of entries in the call stack of the call/return commands. 61 * Call stack currently is an uint16_t array with rule numbers. 62 */ 63 #define IPFW_CALLSTACK_SIZE 16 64 65 /* 66 * The kernel representation of ipfw rules is made of a list of 67 * 'instructions' (for all practical purposes equivalent to BPF 68 * instructions), which specify which fields of the packet 69 * (or its metadata) should be analysed. 70 * 71 * Each instruction is stored in a structure which begins with 72 * "ipfw_insn", and can contain extra fields depending on the 73 * instruction type (listed below). 74 * Note that the code is written so that individual instructions 75 * have a size which is a multiple of 32 bits. This means that, if 76 * such structures contain pointers or other 64-bit entities, 77 * (there is just one instance now) they may end up unaligned on 78 * 64-bit architectures, so the must be handled with care. 79 * 80 * "enum ipfw_opcodes" are the opcodes supported. We can have up 81 * to 256 different opcodes. When adding new opcodes, they should 82 * be appended to the end of the opcode list before O_LAST_OPCODE, 83 * this will prevent the ABI from being broken, otherwise users 84 * will have to recompile ipfw(8) when they update the kernel. 85 */ 86 87 enum ipfw_opcodes { /* arguments (4 byte each) */ 88 O_NOP, 89 90 O_IP_SRC, /* u32 = IP */ 91 O_IP_SRC_MASK, /* ip = IP/mask */ 92 O_IP_SRC_ME, /* none */ 93 O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */ 94 95 O_IP_DST, /* u32 = IP */ 96 O_IP_DST_MASK, /* ip = IP/mask */ 97 O_IP_DST_ME, /* none */ 98 O_IP_DST_SET, /* u32=base, arg1=len, bitmap */ 99 100 O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */ 101 O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */ 102 O_PROTO, /* arg1=protocol */ 103 104 O_MACADDR2, /* 2 mac addr:mask */ 105 O_MAC_TYPE, /* same as srcport */ 106 107 O_LAYER2, /* none */ 108 O_IN, /* none */ 109 O_FRAG, /* none */ 110 111 O_RECV, /* none */ 112 O_XMIT, /* none */ 113 O_VIA, /* none */ 114 115 O_IPOPT, /* arg1 = 2*u8 bitmap */ 116 O_IPLEN, /* arg1 = len */ 117 O_IPID, /* arg1 = id */ 118 119 O_IPTOS, /* arg1 = id */ 120 O_IPPRECEDENCE, /* arg1 = precedence << 5 */ 121 O_IPTTL, /* arg1 = TTL */ 122 123 O_IPVER, /* arg1 = version */ 124 O_UID, /* u32 = id */ 125 O_GID, /* u32 = id */ 126 O_ESTAB, /* none (tcp established) */ 127 O_TCPFLAGS, /* arg1 = 2*u8 bitmap */ 128 O_TCPWIN, /* arg1 = desired win */ 129 O_TCPSEQ, /* u32 = desired seq. */ 130 O_TCPACK, /* u32 = desired seq. */ 131 O_ICMPTYPE, /* u32 = icmp bitmap */ 132 O_TCPOPTS, /* arg1 = 2*u8 bitmap */ 133 134 O_VERREVPATH, /* none */ 135 O_VERSRCREACH, /* none */ 136 137 O_PROBE_STATE, /* none */ 138 O_KEEP_STATE, /* none */ 139 O_LIMIT, /* ipfw_insn_limit */ 140 O_LIMIT_PARENT, /* dyn_type, not an opcode. */ 141 142 /* 143 * These are really 'actions'. 144 */ 145 146 O_LOG, /* ipfw_insn_log */ 147 O_PROB, /* u32 = match probability */ 148 149 O_CHECK_STATE, /* none */ 150 O_ACCEPT, /* none */ 151 O_DENY, /* none */ 152 O_REJECT, /* arg1=icmp arg (same as deny) */ 153 O_COUNT, /* none */ 154 O_SKIPTO, /* arg1=next rule number */ 155 O_PIPE, /* arg1=pipe number */ 156 O_QUEUE, /* arg1=queue number */ 157 O_DIVERT, /* arg1=port number */ 158 O_TEE, /* arg1=port number */ 159 O_FORWARD_IP, /* fwd sockaddr */ 160 O_FORWARD_MAC, /* fwd mac */ 161 O_NAT, /* nope */ 162 O_REASS, /* none */ 163 164 /* 165 * More opcodes. 166 */ 167 O_IPSEC, /* has ipsec history */ 168 O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */ 169 O_IP_DST_LOOKUP, /* arg1=table number, u32=value */ 170 O_ANTISPOOF, /* none */ 171 O_JAIL, /* u32 = id */ 172 O_ALTQ, /* u32 = altq classif. qid */ 173 O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */ 174 O_TCPDATALEN, /* arg1 = tcp data len */ 175 O_IP6_SRC, /* address without mask */ 176 O_IP6_SRC_ME, /* my addresses */ 177 O_IP6_SRC_MASK, /* address with the mask */ 178 O_IP6_DST, 179 O_IP6_DST_ME, 180 O_IP6_DST_MASK, 181 O_FLOW6ID, /* for flow id tag in the ipv6 pkt */ 182 O_ICMP6TYPE, /* icmp6 packet type filtering */ 183 O_EXT_HDR, /* filtering for ipv6 extension header */ 184 O_IP6, 185 186 /* 187 * actions for ng_ipfw 188 */ 189 O_NETGRAPH, /* send to ng_ipfw */ 190 O_NGTEE, /* copy to ng_ipfw */ 191 192 O_IP4, 193 194 O_UNREACH6, /* arg1=icmpv6 code arg (deny) */ 195 196 O_TAG, /* arg1=tag number */ 197 O_TAGGED, /* arg1=tag number */ 198 199 O_SETFIB, /* arg1=FIB number */ 200 O_FIB, /* arg1=FIB desired fib number */ 201 202 O_CALLRETURN, /* arg1=called rule number */ 203 204 O_LAST_OPCODE /* not an opcode! */ 205 }; 206 207 /* 208 * The extension header are filtered only for presence using a bit 209 * vector with a flag for each header. 210 */ 211 #define EXT_FRAGMENT 0x1 212 #define EXT_HOPOPTS 0x2 213 #define EXT_ROUTING 0x4 214 #define EXT_AH 0x8 215 #define EXT_ESP 0x10 216 #define EXT_DSTOPTS 0x20 217 #define EXT_RTHDR0 0x40 218 #define EXT_RTHDR2 0x80 219 220 /* 221 * Template for instructions. 222 * 223 * ipfw_insn is used for all instructions which require no operands, 224 * a single 16-bit value (arg1), or a couple of 8-bit values. 225 * 226 * For other instructions which require different/larger arguments 227 * we have derived structures, ipfw_insn_*. 228 * 229 * The size of the instruction (in 32-bit words) is in the low 230 * 6 bits of "len". The 2 remaining bits are used to implement 231 * NOT and OR on individual instructions. Given a type, you can 232 * compute the length to be put in "len" using F_INSN_SIZE(t) 233 * 234 * F_NOT negates the match result of the instruction. 235 * 236 * F_OR is used to build or blocks. By default, instructions 237 * are evaluated as part of a logical AND. An "or" block 238 * { X or Y or Z } contains F_OR set in all but the last 239 * instruction of the block. A match will cause the code 240 * to skip past the last instruction of the block. 241 * 242 * NOTA BENE: in a couple of places we assume that 243 * sizeof(ipfw_insn) == sizeof(u_int32_t) 244 * this needs to be fixed. 245 * 246 */ 247 typedef struct _ipfw_insn { /* template for instructions */ 248 u_int8_t opcode; 249 u_int8_t len; /* number of 32-bit words */ 250 #define F_NOT 0x80 251 #define F_OR 0x40 252 #define F_LEN_MASK 0x3f 253 #define F_LEN(cmd) ((cmd)->len & F_LEN_MASK) 254 255 u_int16_t arg1; 256 } ipfw_insn; 257 258 /* 259 * The F_INSN_SIZE(type) computes the size, in 4-byte words, of 260 * a given type. 261 */ 262 #define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t)) 263 264 /* 265 * This is used to store an array of 16-bit entries (ports etc.) 266 */ 267 typedef struct _ipfw_insn_u16 { 268 ipfw_insn o; 269 u_int16_t ports[2]; /* there may be more */ 270 } ipfw_insn_u16; 271 272 /* 273 * This is used to store an array of 32-bit entries 274 * (uid, single IPv4 addresses etc.) 275 */ 276 typedef struct _ipfw_insn_u32 { 277 ipfw_insn o; 278 u_int32_t d[1]; /* one or more */ 279 } ipfw_insn_u32; 280 281 /* 282 * This is used to store IP addr-mask pairs. 283 */ 284 typedef struct _ipfw_insn_ip { 285 ipfw_insn o; 286 struct in_addr addr; 287 struct in_addr mask; 288 } ipfw_insn_ip; 289 290 /* 291 * This is used to forward to a given address (ip). 292 */ 293 typedef struct _ipfw_insn_sa { 294 ipfw_insn o; 295 struct sockaddr_in sa; 296 } ipfw_insn_sa; 297 298 /* 299 * This is used for MAC addr-mask pairs. 300 */ 301 typedef struct _ipfw_insn_mac { 302 ipfw_insn o; 303 u_char addr[12]; /* dst[6] + src[6] */ 304 u_char mask[12]; /* dst[6] + src[6] */ 305 } ipfw_insn_mac; 306 307 /* 308 * This is used for interface match rules (recv xx, xmit xx). 309 */ 310 typedef struct _ipfw_insn_if { 311 ipfw_insn o; 312 union { 313 struct in_addr ip; 314 int glob; 315 } p; 316 char name[IFNAMSIZ]; 317 } ipfw_insn_if; 318 319 /* 320 * This is used for storing an altq queue id number. 321 */ 322 typedef struct _ipfw_insn_altq { 323 ipfw_insn o; 324 u_int32_t qid; 325 } ipfw_insn_altq; 326 327 /* 328 * This is used for limit rules. 329 */ 330 typedef struct _ipfw_insn_limit { 331 ipfw_insn o; 332 u_int8_t _pad; 333 u_int8_t limit_mask; /* combination of DYN_* below */ 334 #define DYN_SRC_ADDR 0x1 335 #define DYN_SRC_PORT 0x2 336 #define DYN_DST_ADDR 0x4 337 #define DYN_DST_PORT 0x8 338 339 u_int16_t conn_limit; 340 } ipfw_insn_limit; 341 342 /* 343 * This is used for log instructions. 344 */ 345 typedef struct _ipfw_insn_log { 346 ipfw_insn o; 347 u_int32_t max_log; /* how many do we log -- 0 = all */ 348 u_int32_t log_left; /* how many left to log */ 349 } ipfw_insn_log; 350 351 /* 352 * Data structures required by both ipfw(8) and ipfw(4) but not part of the 353 * management API are protected by IPFW_INTERNAL. 354 */ 355 #ifdef IPFW_INTERNAL 356 /* Server pool support (LSNAT). */ 357 struct cfg_spool { 358 LIST_ENTRY(cfg_spool) _next; /* chain of spool instances */ 359 struct in_addr addr; 360 u_short port; 361 }; 362 #endif 363 364 /* Redirect modes id. */ 365 #define REDIR_ADDR 0x01 366 #define REDIR_PORT 0x02 367 #define REDIR_PROTO 0x04 368 369 #ifdef IPFW_INTERNAL 370 /* Nat redirect configuration. */ 371 struct cfg_redir { 372 LIST_ENTRY(cfg_redir) _next; /* chain of redir instances */ 373 u_int16_t mode; /* type of redirect mode */ 374 struct in_addr laddr; /* local ip address */ 375 struct in_addr paddr; /* public ip address */ 376 struct in_addr raddr; /* remote ip address */ 377 u_short lport; /* local port */ 378 u_short pport; /* public port */ 379 u_short rport; /* remote port */ 380 u_short pport_cnt; /* number of public ports */ 381 u_short rport_cnt; /* number of remote ports */ 382 int proto; /* protocol: tcp/udp */ 383 struct alias_link **alink; 384 /* num of entry in spool chain */ 385 u_int16_t spool_cnt; 386 /* chain of spool instances */ 387 LIST_HEAD(spool_chain, cfg_spool) spool_chain; 388 }; 389 #endif 390 391 #ifdef IPFW_INTERNAL 392 /* Nat configuration data struct. */ 393 struct cfg_nat { 394 /* chain of nat instances */ 395 LIST_ENTRY(cfg_nat) _next; 396 int id; /* nat id */ 397 struct in_addr ip; /* nat ip address */ 398 char if_name[IF_NAMESIZE]; /* interface name */ 399 int mode; /* aliasing mode */ 400 struct libalias *lib; /* libalias instance */ 401 /* number of entry in spool chain */ 402 int redir_cnt; 403 /* chain of redir instances */ 404 LIST_HEAD(redir_chain, cfg_redir) redir_chain; 405 }; 406 #endif 407 408 #define SOF_NAT sizeof(struct cfg_nat) 409 #define SOF_REDIR sizeof(struct cfg_redir) 410 #define SOF_SPOOL sizeof(struct cfg_spool) 411 412 /* Nat command. */ 413 typedef struct _ipfw_insn_nat { 414 ipfw_insn o; 415 struct cfg_nat *nat; 416 } ipfw_insn_nat; 417 418 /* Apply ipv6 mask on ipv6 addr */ 419 #define APPLY_MASK(addr,mask) \ 420 (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \ 421 (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \ 422 (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \ 423 (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3]; 424 425 /* Structure for ipv6 */ 426 typedef struct _ipfw_insn_ip6 { 427 ipfw_insn o; 428 struct in6_addr addr6; 429 struct in6_addr mask6; 430 } ipfw_insn_ip6; 431 432 /* Used to support icmp6 types */ 433 typedef struct _ipfw_insn_icmp6 { 434 ipfw_insn o; 435 uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h 436 * define ICMP6_MAXTYPE 437 * as follows: n = ICMP6_MAXTYPE/32 + 1 438 * Actually is 203 439 */ 440 } ipfw_insn_icmp6; 441 442 /* 443 * Here we have the structure representing an ipfw rule. 444 * 445 * It starts with a general area (with link fields and counters) 446 * followed by an array of one or more instructions, which the code 447 * accesses as an array of 32-bit values. 448 * 449 * Given a rule pointer r: 450 * 451 * r->cmd is the start of the first instruction. 452 * ACTION_PTR(r) is the start of the first action (things to do 453 * once a rule matched). 454 * 455 * When assembling instruction, remember the following: 456 * 457 * + if a rule has a "keep-state" (or "limit") option, then the 458 * first instruction (at r->cmd) MUST BE an O_PROBE_STATE 459 * + if a rule has a "log" option, then the first action 460 * (at ACTION_PTR(r)) MUST be O_LOG 461 * + if a rule has an "altq" option, it comes after "log" 462 * + if a rule has an O_TAG option, it comes after "log" and "altq" 463 * 464 * NOTE: we use a simple linked list of rules because we never need 465 * to delete a rule without scanning the list. We do not use 466 * queue(3) macros for portability and readability. 467 */ 468 469 struct ip_fw { 470 struct ip_fw *x_next; /* linked list of rules */ 471 struct ip_fw *next_rule; /* ptr to next [skipto] rule */ 472 /* 'next_rule' is used to pass up 'set_disable' status */ 473 474 uint16_t act_ofs; /* offset of action in 32-bit units */ 475 uint16_t cmd_len; /* # of 32-bit words in cmd */ 476 uint16_t rulenum; /* rule number */ 477 uint8_t set; /* rule set (0..31) */ 478 #define RESVD_SET 31 /* set for default and persistent rules */ 479 uint8_t _pad; /* padding */ 480 uint32_t id; /* rule id */ 481 482 /* These fields are present in all rules. */ 483 uint64_t pcnt; /* Packet counter */ 484 uint64_t bcnt; /* Byte counter */ 485 uint32_t timestamp; /* tv_sec of last match */ 486 487 ipfw_insn cmd[1]; /* storage for commands */ 488 }; 489 490 #define ACTION_PTR(rule) \ 491 (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) ) 492 493 #define RULESIZE(rule) (sizeof(struct ip_fw) + \ 494 ((struct ip_fw *)(rule))->cmd_len * 4 - 4) 495 496 #if 1 // should be moved to in.h 497 /* 498 * This structure is used as a flow mask and a flow id for various 499 * parts of the code. 500 * addr_type is used in userland and kernel to mark the address type. 501 * fib is used in the kernel to record the fib in use. 502 * _flags is used in the kernel to store tcp flags for dynamic rules. 503 */ 504 struct ipfw_flow_id { 505 uint32_t dst_ip; 506 uint32_t src_ip; 507 uint16_t dst_port; 508 uint16_t src_port; 509 uint8_t fib; 510 uint8_t proto; 511 uint8_t _flags; /* protocol-specific flags */ 512 uint8_t addr_type; /* 4=ip4, 6=ip6, 1=ether ? */ 513 struct in6_addr dst_ip6; 514 struct in6_addr src_ip6; 515 uint32_t flow_id6; 516 uint32_t extra; /* queue/pipe or frag_id */ 517 }; 518 #endif 519 520 #define IS_IP6_FLOW_ID(id) ((id)->addr_type == 6) 521 522 /* 523 * Dynamic ipfw rule. 524 */ 525 typedef struct _ipfw_dyn_rule ipfw_dyn_rule; 526 527 struct _ipfw_dyn_rule { 528 ipfw_dyn_rule *next; /* linked list of rules. */ 529 struct ip_fw *rule; /* pointer to rule */ 530 /* 'rule' is used to pass up the rule number (from the parent) */ 531 532 ipfw_dyn_rule *parent; /* pointer to parent rule */ 533 u_int64_t pcnt; /* packet match counter */ 534 u_int64_t bcnt; /* byte match counter */ 535 struct ipfw_flow_id id; /* (masked) flow id */ 536 u_int32_t expire; /* expire time */ 537 u_int32_t bucket; /* which bucket in hash table */ 538 u_int32_t state; /* state of this rule (typically a 539 * combination of TCP flags) 540 */ 541 u_int32_t ack_fwd; /* most recent ACKs in forward */ 542 u_int32_t ack_rev; /* and reverse directions (used */ 543 /* to generate keepalives) */ 544 u_int16_t dyn_type; /* rule type */ 545 u_int16_t count; /* refcount */ 546 }; 547 548 /* 549 * Definitions for IP option names. 550 */ 551 #define IP_FW_IPOPT_LSRR 0x01 552 #define IP_FW_IPOPT_SSRR 0x02 553 #define IP_FW_IPOPT_RR 0x04 554 #define IP_FW_IPOPT_TS 0x08 555 556 /* 557 * Definitions for TCP option names. 558 */ 559 #define IP_FW_TCPOPT_MSS 0x01 560 #define IP_FW_TCPOPT_WINDOW 0x02 561 #define IP_FW_TCPOPT_SACK 0x04 562 #define IP_FW_TCPOPT_TS 0x08 563 #define IP_FW_TCPOPT_CC 0x10 564 565 #define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */ 566 #define ICMP6_UNREACH_RST 0x100 /* fake ICMPv6 code (send a TCP RST) */ 567 568 /* 569 * These are used for lookup tables. 570 */ 571 typedef struct _ipfw_table_entry { 572 in_addr_t addr; /* network address */ 573 u_int32_t value; /* value */ 574 u_int16_t tbl; /* table number */ 575 u_int8_t masklen; /* mask length */ 576 } ipfw_table_entry; 577 578 typedef struct _ipfw_table { 579 u_int32_t size; /* size of entries in bytes */ 580 u_int32_t cnt; /* # of entries */ 581 u_int16_t tbl; /* table number */ 582 ipfw_table_entry ent[0]; /* entries */ 583 } ipfw_table; 584 585 #endif /* _IPFW2_H */
Cache object: cac13f7f50f06db1e73e8ec13db18fbe
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]