2 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
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
37 #define IPFW_DEFAULT_RULE 65535
39 #define RESVD_SET 31 /*set for default and persistent rules*/
40 #define IPFW_MAX_SETS 32 /* Number of sets supported by ipfw*/
43 * Default number of ipfw tables.
45 #define IPFW_TABLES_MAX 65535
46 #define IPFW_TABLES_DEFAULT 128
49 * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit
50 * argument between 1 and 65534. The value 0 is unused, the value
51 * 65535 (IP_FW_TABLEARG) is used to represent 'tablearg', i.e. the
52 * can be 1..65534, or 65535 to indicate the use of a 'tablearg'
53 * result of the most recent table() lookup.
54 * Note that 16bit is only a historical limit, resulting from
55 * the use of a 16-bit fields for that value. In reality, we can have
56 * 2^32 pipes, queues, tag values and so on, and use 0 as a tablearg.
58 #define IPFW_ARG_MIN 1
59 #define IPFW_ARG_MAX 65534
60 #define IP_FW_TABLEARG 65535 /* XXX should use 0 */
63 * Number of entries in the call stack of the call/return commands.
64 * Call stack currently is an uint16_t array with rule numbers.
66 #define IPFW_CALLSTACK_SIZE 16
68 /* IP_FW3 header/opcodes */
69 typedef struct _ip_fw3_opheader {
70 uint16_t opcode; /* Operation opcode */
71 uint16_t version; /* Opcode version */
72 uint16_t reserved[2]; /* Align to 64-bit boundary */
76 /* IPFW extented tables support */
77 #define IP_FW_TABLE_XADD 86 /* add entry */
78 #define IP_FW_TABLE_XDEL 87 /* delete entry */
79 #define IP_FW_TABLE_XGETSIZE 88 /* get table size (deprecated) */
80 #define IP_FW_TABLE_XLIST 89 /* list table contents */
81 #define IP_FW_TABLE_XDESTROY 90 /* destroy table */
82 #define IP_FW_TABLES_XGETSIZE 91 /* get size for tables list */
83 #define IP_FW_TABLES_XLIST 92 /* list all tables */
84 #define IP_FW_TABLE_XINFO 93 /* request info for one table */
85 #define IP_FW_TABLE_XFLUSH 94 /* flush table data */
86 #define IP_FW_TABLE_XCREATE 95 /* create new table */
87 //#define IP_FW_TABLE_XMODIFY 96 /* modify existing table */
88 #define IP_FW_XGET 97 /* Retrieve configuration */
89 #define IP_FW_XADD 98 /* add entry */
90 #define IP_FW_TABLE_XFIND 99 /* finds an entry */
91 #define IP_FW_XIFLIST 100 /* list tracked interfaces */
92 #define IP_FW_TABLES_ALIST 101 /* list table algorithms */
97 * IP_FW_TABLE_XLIST(ver 1): Dumps all table data
98 * Request(getsockopt): [ ipfw_obj_lheader ], size = ipfw_xtable_info.size
99 * Reply: [ ipfw_obj_lheader ipfw_xtable_info ipfw_table_xentry x N ]
101 * IP_FW_TABLE_XDESTROY: Destroys given table
102 * Request(setsockopt): [ ipfw_obj_header ]
104 * IP_FW_TABLES_XGETSIZE: Get buffer size needed to list info for all tables.
105 * Request(getsockopt): [ empty ], size = sizeof(ipfw_obj_lheader)
106 * Reply: [ ipfw_obj_lheader ]
108 * IP_FW_TABLES_XLIST: Lists all tables currently available in kernel.
109 * Request(getsockopt): [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size
110 * Reply: [ ipfw_obj_lheader ipfw_xtable_info x N ]
112 * IP_FW_TABLE_XINFO: Store table info to buffer.
113 * Request(getsockopt): [ ipfw_obj_header ipfw_xtable_info(empty)]
114 * Reply: [ ipfw_obj_header ipfw_xtable_info ]
116 * IP_FW_TABLE_XFLUSH: Removes all data from given table leaving type etc..
117 * Request(setsockopt): [ ipfw_obj_header ]
121 * The kernel representation of ipfw rules is made of a list of
122 * 'instructions' (for all practical purposes equivalent to BPF
123 * instructions), which specify which fields of the packet
124 * (or its metadata) should be analysed.
126 * Each instruction is stored in a structure which begins with
127 * "ipfw_insn", and can contain extra fields depending on the
128 * instruction type (listed below).
129 * Note that the code is written so that individual instructions
130 * have a size which is a multiple of 32 bits. This means that, if
131 * such structures contain pointers or other 64-bit entities,
132 * (there is just one instance now) they may end up unaligned on
133 * 64-bit architectures, so the must be handled with care.
135 * "enum ipfw_opcodes" are the opcodes supported. We can have up
136 * to 256 different opcodes. When adding new opcodes, they should
137 * be appended to the end of the opcode list before O_LAST_OPCODE,
138 * this will prevent the ABI from being broken, otherwise users
139 * will have to recompile ipfw(8) when they update the kernel.
142 enum ipfw_opcodes { /* arguments (4 byte each) */
145 O_IP_SRC, /* u32 = IP */
146 O_IP_SRC_MASK, /* ip = IP/mask */
147 O_IP_SRC_ME, /* none */
148 O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */
150 O_IP_DST, /* u32 = IP */
151 O_IP_DST_MASK, /* ip = IP/mask */
152 O_IP_DST_ME, /* none */
153 O_IP_DST_SET, /* u32=base, arg1=len, bitmap */
155 O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */
156 O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */
157 O_PROTO, /* arg1=protocol */
159 O_MACADDR2, /* 2 mac addr:mask */
160 O_MAC_TYPE, /* same as srcport */
170 O_IPOPT, /* arg1 = 2*u8 bitmap */
171 O_IPLEN, /* arg1 = len */
172 O_IPID, /* arg1 = id */
174 O_IPTOS, /* arg1 = id */
175 O_IPPRECEDENCE, /* arg1 = precedence << 5 */
176 O_IPTTL, /* arg1 = TTL */
178 O_IPVER, /* arg1 = version */
179 O_UID, /* u32 = id */
180 O_GID, /* u32 = id */
181 O_ESTAB, /* none (tcp established) */
182 O_TCPFLAGS, /* arg1 = 2*u8 bitmap */
183 O_TCPWIN, /* arg1 = desired win */
184 O_TCPSEQ, /* u32 = desired seq. */
185 O_TCPACK, /* u32 = desired seq. */
186 O_ICMPTYPE, /* u32 = icmp bitmap */
187 O_TCPOPTS, /* arg1 = 2*u8 bitmap */
189 O_VERREVPATH, /* none */
190 O_VERSRCREACH, /* none */
192 O_PROBE_STATE, /* none */
193 O_KEEP_STATE, /* none */
194 O_LIMIT, /* ipfw_insn_limit */
195 O_LIMIT_PARENT, /* dyn_type, not an opcode. */
198 * These are really 'actions'.
201 O_LOG, /* ipfw_insn_log */
202 O_PROB, /* u32 = match probability */
204 O_CHECK_STATE, /* none */
207 O_REJECT, /* arg1=icmp arg (same as deny) */
209 O_SKIPTO, /* arg1=next rule number */
210 O_PIPE, /* arg1=pipe number */
211 O_QUEUE, /* arg1=queue number */
212 O_DIVERT, /* arg1=port number */
213 O_TEE, /* arg1=port number */
214 O_FORWARD_IP, /* fwd sockaddr */
215 O_FORWARD_MAC, /* fwd mac */
222 O_IPSEC, /* has ipsec history */
223 O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */
224 O_IP_DST_LOOKUP, /* arg1=table number, u32=value */
225 O_ANTISPOOF, /* none */
226 O_JAIL, /* u32 = id */
227 O_ALTQ, /* u32 = altq classif. qid */
228 O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */
229 O_TCPDATALEN, /* arg1 = tcp data len */
230 O_IP6_SRC, /* address without mask */
231 O_IP6_SRC_ME, /* my addresses */
232 O_IP6_SRC_MASK, /* address with the mask */
236 O_FLOW6ID, /* for flow id tag in the ipv6 pkt */
237 O_ICMP6TYPE, /* icmp6 packet type filtering */
238 O_EXT_HDR, /* filtering for ipv6 extension header */
242 * actions for ng_ipfw
244 O_NETGRAPH, /* send to ng_ipfw */
245 O_NGTEE, /* copy to ng_ipfw */
249 O_UNREACH6, /* arg1=icmpv6 code arg (deny) */
251 O_TAG, /* arg1=tag number */
252 O_TAGGED, /* arg1=tag number */
254 O_SETFIB, /* arg1=FIB number */
255 O_FIB, /* arg1=FIB desired fib number */
257 O_SOCKARG, /* socket argument */
259 O_CALLRETURN, /* arg1=called rule number */
261 O_FORWARD_IP6, /* fwd sockaddr_in6 */
263 O_DSCP, /* 2 u32 = DSCP mask */
264 O_SETDSCP, /* arg1=DSCP value */
265 O_IP_FLOW_LOOKUP, /* arg1=table number, u32=value */
267 O_LAST_OPCODE /* not an opcode! */
272 * The extension header are filtered only for presence using a bit
273 * vector with a flag for each header.
275 #define EXT_FRAGMENT 0x1
276 #define EXT_HOPOPTS 0x2
277 #define EXT_ROUTING 0x4
280 #define EXT_DSTOPTS 0x20
281 #define EXT_RTHDR0 0x40
282 #define EXT_RTHDR2 0x80
285 * Template for instructions.
287 * ipfw_insn is used for all instructions which require no operands,
288 * a single 16-bit value (arg1), or a couple of 8-bit values.
290 * For other instructions which require different/larger arguments
291 * we have derived structures, ipfw_insn_*.
293 * The size of the instruction (in 32-bit words) is in the low
294 * 6 bits of "len". The 2 remaining bits are used to implement
295 * NOT and OR on individual instructions. Given a type, you can
296 * compute the length to be put in "len" using F_INSN_SIZE(t)
298 * F_NOT negates the match result of the instruction.
300 * F_OR is used to build or blocks. By default, instructions
301 * are evaluated as part of a logical AND. An "or" block
302 * { X or Y or Z } contains F_OR set in all but the last
303 * instruction of the block. A match will cause the code
304 * to skip past the last instruction of the block.
306 * NOTA BENE: in a couple of places we assume that
307 * sizeof(ipfw_insn) == sizeof(u_int32_t)
308 * this needs to be fixed.
311 typedef struct _ipfw_insn { /* template for instructions */
313 u_int8_t len; /* number of 32-bit words */
316 #define F_LEN_MASK 0x3f
317 #define F_LEN(cmd) ((cmd)->len & F_LEN_MASK)
323 * The F_INSN_SIZE(type) computes the size, in 4-byte words, of
326 #define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t))
329 * This is used to store an array of 16-bit entries (ports etc.)
331 typedef struct _ipfw_insn_u16 {
333 u_int16_t ports[2]; /* there may be more */
337 * This is used to store an array of 32-bit entries
338 * (uid, single IPv4 addresses etc.)
340 typedef struct _ipfw_insn_u32 {
342 u_int32_t d[1]; /* one or more */
346 * This is used to store IP addr-mask pairs.
348 typedef struct _ipfw_insn_ip {
355 * This is used to forward to a given address (ip).
357 typedef struct _ipfw_insn_sa {
359 struct sockaddr_in sa;
363 * This is used to forward to a given address (ipv6).
365 typedef struct _ipfw_insn_sa6 {
367 struct sockaddr_in6 sa;
371 * This is used for MAC addr-mask pairs.
373 typedef struct _ipfw_insn_mac {
375 u_char addr[12]; /* dst[6] + src[6] */
376 u_char mask[12]; /* dst[6] + src[6] */
380 * This is used for interface match rules (recv xx, xmit xx).
382 typedef struct _ipfw_insn_if {
392 * This is used for storing an altq queue id number.
394 typedef struct _ipfw_insn_altq {
400 * This is used for limit rules.
402 typedef struct _ipfw_insn_limit {
405 u_int8_t limit_mask; /* combination of DYN_* below */
406 #define DYN_SRC_ADDR 0x1
407 #define DYN_SRC_PORT 0x2
408 #define DYN_DST_ADDR 0x4
409 #define DYN_DST_PORT 0x8
411 u_int16_t conn_limit;
415 * This is used for log instructions.
417 typedef struct _ipfw_insn_log {
419 u_int32_t max_log; /* how many do we log -- 0 = all */
420 u_int32_t log_left; /* how many left to log */
424 * Data structures required by both ipfw(8) and ipfw(4) but not part of the
425 * management API are protected by IPFW_INTERNAL.
428 /* Server pool support (LSNAT). */
430 LIST_ENTRY(cfg_spool) _next; /* chain of spool instances */
436 /* Redirect modes id. */
437 #define REDIR_ADDR 0x01
438 #define REDIR_PORT 0x02
439 #define REDIR_PROTO 0x04
442 /* Nat redirect configuration. */
444 LIST_ENTRY(cfg_redir) _next; /* chain of redir instances */
445 u_int16_t mode; /* type of redirect mode */
446 struct in_addr laddr; /* local ip address */
447 struct in_addr paddr; /* public ip address */
448 struct in_addr raddr; /* remote ip address */
449 u_short lport; /* local port */
450 u_short pport; /* public port */
451 u_short rport; /* remote port */
452 u_short pport_cnt; /* number of public ports */
453 u_short rport_cnt; /* number of remote ports */
454 int proto; /* protocol: tcp/udp */
455 struct alias_link **alink;
456 /* num of entry in spool chain */
458 /* chain of spool instances */
459 LIST_HEAD(spool_chain, cfg_spool) spool_chain;
464 /* Nat configuration data struct. */
466 /* chain of nat instances */
467 LIST_ENTRY(cfg_nat) _next;
469 struct in_addr ip; /* nat ip address */
470 char if_name[IF_NAMESIZE]; /* interface name */
471 int mode; /* aliasing mode */
472 struct libalias *lib; /* libalias instance */
473 /* number of entry in spool chain */
475 /* chain of redir instances */
476 LIST_HEAD(redir_chain, cfg_redir) redir_chain;
480 #define SOF_NAT sizeof(struct cfg_nat)
481 #define SOF_REDIR sizeof(struct cfg_redir)
482 #define SOF_SPOOL sizeof(struct cfg_spool)
485 typedef struct _ipfw_insn_nat {
490 /* Apply ipv6 mask on ipv6 addr */
491 #define APPLY_MASK(addr,mask) \
492 (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \
493 (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \
494 (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \
495 (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3];
497 /* Structure for ipv6 */
498 typedef struct _ipfw_insn_ip6 {
500 struct in6_addr addr6;
501 struct in6_addr mask6;
504 /* Used to support icmp6 types */
505 typedef struct _ipfw_insn_icmp6 {
507 uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h
508 * define ICMP6_MAXTYPE
509 * as follows: n = ICMP6_MAXTYPE/32 + 1
515 * Here we have the structure representing an ipfw rule.
519 * [ counter block, size = rule->cntr_len ]
520 * [ one or more instructions, size = rule->cmd_len * 4 ]
522 * It starts with a general area (with link fields).
523 * Counter block may be next (if rule->cntr_len > 0),
524 * followed by an array of one or more instructions, which the code
525 * accesses as an array of 32-bit values. rule->cmd_len represents
526 * the total instructions legth in u32 worrd, while act_ofs represents
527 * rule action offset in u32 words.
529 * When assembling instruction, remember the following:
531 * + if a rule has a "keep-state" (or "limit") option, then the
532 * first instruction (at r->cmd) MUST BE an O_PROBE_STATE
533 * + if a rule has a "log" option, then the first action
534 * (at ACTION_PTR(r)) MUST be O_LOG
535 * + if a rule has an "altq" option, it comes after "log"
536 * + if a rule has an O_TAG option, it comes after "log" and "altq"
539 * All structures (excluding instructions) are u64-aligned.
544 uint16_t act_ofs; /* offset of action in 32-bit units */
545 uint16_t cmd_len; /* # of 32-bit words in cmd */
547 uint8_t set; /* rule set (0..31) */
548 uint8_t flags; /* rule flags */
549 uint32_t rulenum; /* rule number */
550 uint32_t id; /* rule id */
552 ipfw_insn cmd[1]; /* storage for commands */
554 #define IPFW_RULE_NOOPT 0x01 /* Has no options in body */
556 /* Unaligned version */
558 /* Base ipfw rule counter block. */
559 struct ip_fw_bcounter {
560 uint16_t size; /* Size of counter block, bytes */
561 uint8_t flags; /* flags for given block */
563 uint32_t timestamp; /* tv_sec of last match */
564 uint64_t pcnt; /* Packet counter */
565 uint64_t bcnt; /* Byte counter */
574 struct ip_fw *x_next; /* linked list of rules */
575 struct ip_fw *next_rule; /* ptr to next [skipto] rule */
576 /* 'next_rule' is used to pass up 'set_disable' status */
578 uint16_t act_ofs; /* offset of action in 32-bit units */
579 uint16_t cmd_len; /* # of 32-bit words in cmd */
580 uint16_t rulenum; /* rule number */
581 uint8_t set; /* rule set (0..31) */
582 uint8_t _pad; /* padding */
583 uint32_t id; /* rule id */
585 /* These fields are present in all rules. */
586 uint64_t pcnt; /* Packet counter */
587 uint64_t bcnt; /* Byte counter */
588 uint32_t timestamp; /* tv_sec of last match */
590 ipfw_insn cmd[1]; /* storage for commands */
594 #define ACTION_PTR(rule) \
595 (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) )
597 #define RULESIZE(rule) (sizeof(*(rule)) + (rule)->cmd_len * 4 - 4)
600 #if 1 // should be moved to in.h
602 * This structure is used as a flow mask and a flow id for various
604 * addr_type is used in userland and kernel to mark the address type.
605 * fib is used in the kernel to record the fib in use.
606 * _flags is used in the kernel to store tcp flags for dynamic rules.
608 struct ipfw_flow_id {
615 uint8_t _flags; /* protocol-specific flags */
616 uint8_t addr_type; /* 4=ip4, 6=ip6, 1=ether ? */
617 struct in6_addr dst_ip6;
618 struct in6_addr src_ip6;
620 uint32_t extra; /* queue/pipe or frag_id */
624 #define IS_IP6_FLOW_ID(id) ((id)->addr_type == 6)
629 typedef struct _ipfw_dyn_rule ipfw_dyn_rule;
631 struct _ipfw_dyn_rule {
632 ipfw_dyn_rule *next; /* linked list of rules. */
633 struct ip_fw *rule; /* pointer to rule */
634 /* 'rule' is used to pass up the rule number (from the parent) */
636 ipfw_dyn_rule *parent; /* pointer to parent rule */
637 u_int64_t pcnt; /* packet match counter */
638 u_int64_t bcnt; /* byte match counter */
639 struct ipfw_flow_id id; /* (masked) flow id */
640 u_int32_t expire; /* expire time */
641 u_int32_t bucket; /* which bucket in hash table */
642 u_int32_t state; /* state of this rule (typically a
643 * combination of TCP flags)
645 u_int32_t ack_fwd; /* most recent ACKs in forward */
646 u_int32_t ack_rev; /* and reverse directions (used */
647 /* to generate keepalives) */
648 u_int16_t dyn_type; /* rule type */
649 u_int16_t count; /* refcount */
653 * Definitions for IP option names.
655 #define IP_FW_IPOPT_LSRR 0x01
656 #define IP_FW_IPOPT_SSRR 0x02
657 #define IP_FW_IPOPT_RR 0x04
658 #define IP_FW_IPOPT_TS 0x08
661 * Definitions for TCP option names.
663 #define IP_FW_TCPOPT_MSS 0x01
664 #define IP_FW_TCPOPT_WINDOW 0x02
665 #define IP_FW_TCPOPT_SACK 0x04
666 #define IP_FW_TCPOPT_TS 0x08
667 #define IP_FW_TCPOPT_CC 0x10
669 #define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */
670 #define ICMP6_UNREACH_RST 0x100 /* fake ICMPv6 code (send a TCP RST) */
673 * These are used for lookup tables.
676 #define IPFW_TABLE_CIDR 1 /* Table for holding IPv4/IPv6 prefixes */
677 #define IPFW_TABLE_INTERFACE 2 /* Table for holding interface names */
678 #define IPFW_TABLE_NUMBER 3 /* Table for holding ports/uid/gid/etc */
679 #define IPFW_TABLE_FLOW 4 /* Table for holding flow data */
680 #define IPFW_TABLE_MAXTYPE 4 /* Maximum valid number */
682 #define IPFW_VTYPE_U32 1 /* Skipto/tablearg integer */
683 #define IPFW_VTYPE_IP 2 /* Nexthop IP address */
684 #define IPFW_VTYPE_DSCP 3 /* DiffServ codepoints */
686 typedef struct _ipfw_table_entry {
687 in_addr_t addr; /* network address */
688 u_int32_t value; /* value */
689 u_int16_t tbl; /* table number */
690 u_int8_t masklen; /* mask length */
693 typedef struct _ipfw_table_xentry {
694 uint16_t len; /* Total entry length */
695 uint8_t type; /* entry type */
696 uint8_t masklen; /* mask length */
697 uint16_t tbl; /* table number */
698 uint16_t flags; /* record flags */
699 uint32_t value; /* value */
701 /* Longest field needs to be aligned by 4-byte boundary */
702 struct in6_addr addr6; /* IPv6 address */
703 char iface[IF_NAMESIZE]; /* interface name */
706 #define IPFW_TCF_INET 0x01 /* CIDR flags: IPv4 record */
708 typedef struct _ipfw_table {
709 u_int32_t size; /* size of entries in bytes */
710 u_int32_t cnt; /* # of entries */
711 u_int16_t tbl; /* table number */
712 ipfw_table_entry ent[0]; /* entries */
715 typedef struct _ipfw_xtable {
716 ip_fw3_opheader opheader; /* IP_FW3 opcode */
717 uint32_t size; /* size of entries in bytes */
718 uint32_t cnt; /* # of entries */
719 uint16_t tbl; /* table number */
720 uint8_t type; /* table type */
721 ipfw_table_xentry xent[0]; /* entries */
724 typedef struct _ipfw_obj_tlv {
725 uint16_t type; /* TLV type */
726 uint16_t flags; /* TLV-specific flags */
727 uint32_t length; /* Total length, aligned to u64 */
729 #define IPFW_TLV_TBL_NAME 1
730 #define IPFW_TLV_TBLNAME_LIST 2
731 #define IPFW_TLV_RULE_LIST 3
732 #define IPFW_TLV_DYNSTATE_LIST 4
733 #define IPFW_TLV_TBL_ENT 5
734 #define IPFW_TLV_DYN_ENT 6
735 #define IPFW_TLV_RULE_ENT 7
736 #define IPFW_TLV_TBLENT_LIST 8
738 /* Object name TLV */
739 typedef struct _ipfw_obj_ntlv {
740 ipfw_obj_tlv head; /* TLV header */
741 uint16_t idx; /* Name index */
742 uint8_t spare; /* unused */
743 uint8_t type; /* object type, if applicable */
744 uint32_t set; /* set, if applicable */
745 char name[64]; /* Null-terminated name */
748 /* IPv4/IPv6 L4 flow description */
761 struct in6_addr sip6;
762 struct in6_addr dip6;
767 /* Table entry TLV */
768 typedef struct _ipfw_obj_tentry {
769 ipfw_obj_tlv head; /* TLV header */
770 uint8_t subtype; /* subtype (IPv4,IPv6) */
771 uint8_t masklen; /* mask length */
772 uint16_t idx; /* Table name index */
773 uint32_t value; /* value */
776 /* Longest field needs to be aligned by 8-byte boundary */
777 struct in_addr addr; /* IPv4 address */
778 uint32_t key; /* uid/gid/port */
779 struct in6_addr addr6; /* IPv6 address */
780 char iface[IF_NAMESIZE]; /* interface name */
781 struct tflow_entry flow;
784 #define IPFW_TF_UPDATE 0x01 /* Update record if exists */
786 typedef struct _ipfw_obj_dyntlv {
790 #define IPFW_DF_LAST 0x01 /* Last state in chain */
792 /* Containter TLVs */
793 typedef struct _ipfw_obj_ctlv {
794 ipfw_obj_tlv head; /* TLV header */
795 uint32_t count; /* Number of sub-TLVs */
796 uint16_t objsize; /* Single object size */
797 uint8_t version; /* TLV version */
801 typedef struct _ifpw_ta_tinfo {
802 uint32_t flags; /* Format flags */
803 uint8_t taclass; /* algorithm class */
806 uint32_t rssize4; /* runtime structure size */
807 uint32_t rcount4; /* number of items in runtime */
808 uint32_t rsize4; /* item size in runtime */
809 uint32_t rssize6; /* runtime structure size */
810 uint32_t rcount6; /* number of items in runtime */
811 uint32_t rsize6; /* item size in runtime */
813 #define IPFW_TACLASS_HASH 1 /* algo is based on hash */
814 #define IPFW_TACLASS_ARRAY 2 /* algo is based on array */
815 #define IPFW_TACLASS_RADIX 3 /* algo is based on radix tree */
817 #define IPFW_TATFLAGS_DATA 0x0001 /* Has data filled in */
818 #define IPFW_TATFLAGS_AF 0x0002 /* Separate data per AF */
820 typedef struct _ipfw_xtable_info {
821 uint8_t type; /* table type (cidr,iface,..) */
822 uint8_t tflags; /* type flags */
823 uint8_t ftype; /* table value format type */
824 uint8_t vtype; /* value type */
825 uint32_t set; /* set table is in */
826 uint32_t kidx; /* kernel index */
827 uint32_t refcnt; /* number of references */
828 uint32_t count; /* Number of records */
829 uint32_t size; /* Total size of records(export)*/
830 uint32_t limit; /* Max number of records */
832 char tablename[64]; /* table name */
833 char algoname[64]; /* algorithm name */
834 ifpw_ta_tinfo ta_info; /* additional algo stats */
836 #define IPFW_TFFLAG_SRCIP 0x01
837 #define IPFW_TFFLAG_DSTIP 0x02
838 #define IPFW_TFFLAG_SRCPORT 0x04
839 #define IPFW_TFFLAG_DSTPORT 0x08
840 #define IPFW_TFFLAG_PROTO 0x10
842 typedef struct _ipfw_iface_info {
843 char ifname[64]; /* interface name */
844 uint32_t ifindex; /* interface index */
845 uint32_t flags; /* flags */
846 uint32_t refcnt; /* number of references */
847 uint32_t gencnt; /* number of changes */
850 #define IPFW_IFFLAG_RESOLVED 0x01 /* Interface exists */
852 typedef struct _ipfw_ta_info {
853 char algoname[64]; /* algorithm name */
854 uint32_t type; /* lookup type */
861 #define IPFW_OBJTYPE_TABLE 1
862 typedef struct _ipfw_obj_header {
863 ip_fw3_opheader opheader; /* IP_FW3 opcode */
865 uint16_t idx; /* object name index */
866 uint8_t objtype; /* object type */
867 uint8_t objsubtype; /* object subtype */
868 ipfw_obj_ntlv ntlv; /* object name tlv */
871 typedef struct _ipfw_obj_lheader {
872 ip_fw3_opheader opheader; /* IP_FW3 opcode */
873 uint32_t set_mask; /* disabled set mask */
874 uint32_t count; /* Total objects count */
875 uint32_t size; /* Total size (incl. header) */
876 uint32_t objsize; /* Size of one object */
879 #define IPFW_CFG_GET_STATIC 0x01
880 #define IPFW_CFG_GET_STATES 0x02
881 #define IPFW_CFG_GET_COUNTERS 0x04
882 typedef struct _ipfw_cfg_lheader {
883 ip_fw3_opheader opheader; /* IP_FW3 opcode */
884 uint32_t set_mask; /* enabled set mask */
886 uint32_t flags; /* Request flags */
887 uint32_t size; /* neded buffer size */
892 #endif /* _IPFW2_H */