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 * Compat values for old clients
46 #define IPFW_TABLES_MAX 65535
47 #define IPFW_TABLES_DEFAULT 128
51 * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit
52 * argument between 1 and 65534. The value 0 (IP_FW_TARG) is used
53 * to represent 'tablearg' value, e.g. indicate the use of a 'tablearg'
54 * result of the most recent table() lookup.
55 * Note that 16bit is only a historical limit, resulting from
56 * the use of a 16-bit fields for that value. In reality, we can have
57 * 2^32 pipes, queues, tag values and so on.
59 #define IPFW_ARG_MIN 1
60 #define IPFW_ARG_MAX 65534
61 #define IP_FW_TABLEARG 65535 /* Compat value for old clients */
62 #define IP_FW_TARG 0 /* Current tablearg value */
63 #define IP_FW_NAT44_GLOBAL 65535 /* arg1 value for "nat global" */
66 * Number of entries in the call stack of the call/return commands.
67 * Call stack currently is an uint16_t array with rule numbers.
69 #define IPFW_CALLSTACK_SIZE 16
71 /* IP_FW3 header/opcodes */
72 typedef struct _ip_fw3_opheader {
73 uint16_t opcode; /* Operation opcode */
74 uint16_t version; /* Opcode version */
75 uint16_t reserved[2]; /* Align to 64-bit boundary */
79 #define IP_FW_TABLE_XADD 86 /* add entry */
80 #define IP_FW_TABLE_XDEL 87 /* delete entry */
81 #define IP_FW_TABLE_XGETSIZE 88 /* get table size (deprecated) */
82 #define IP_FW_TABLE_XLIST 89 /* list table contents */
83 #define IP_FW_TABLE_XDESTROY 90 /* destroy table */
84 #define IP_FW_TABLES_XLIST 92 /* list all tables */
85 #define IP_FW_TABLE_XINFO 93 /* request info for one table */
86 #define IP_FW_TABLE_XFLUSH 94 /* flush table data */
87 #define IP_FW_TABLE_XCREATE 95 /* create new table */
88 #define IP_FW_TABLE_XMODIFY 96 /* modify existing table */
89 #define IP_FW_XGET 97 /* Retrieve configuration */
90 #define IP_FW_XADD 98 /* add rule */
91 #define IP_FW_XDEL 99 /* del rule */
92 #define IP_FW_XMOVE 100 /* move rules to different set */
93 #define IP_FW_XZERO 101 /* clear accounting */
94 #define IP_FW_XRESETLOG 102 /* zero rules logs */
95 #define IP_FW_SET_SWAP 103 /* Swap between 2 sets */
96 #define IP_FW_SET_MOVE 104 /* Move one set to another one */
97 #define IP_FW_SET_ENABLE 105 /* Enable/disable sets */
98 #define IP_FW_TABLE_XFIND 106 /* finds an entry */
99 #define IP_FW_XIFLIST 107 /* list tracked interfaces */
100 #define IP_FW_TABLES_ALIST 108 /* list table algorithms */
101 #define IP_FW_TABLE_XSWAP 109 /* swap two tables */
102 #define IP_FW_TABLE_VLIST 110 /* dump table value hash */
104 #define IP_FW_NAT44_XCONFIG 111 /* Create/modify NAT44 instance */
105 #define IP_FW_NAT44_DESTROY 112 /* Destroys NAT44 instance */
106 #define IP_FW_NAT44_XGETCONFIG 113 /* Get NAT44 instance config */
107 #define IP_FW_NAT44_LIST_NAT 114 /* List all NAT44 instances */
108 #define IP_FW_NAT44_XGETLOG 115 /* Get log from NAT44 instance */
110 #define IP_FW_DUMP_SOPTCODES 116 /* Dump available sopts/versions */
111 #define IP_FW_DUMP_SRVOBJECTS 117 /* Dump existing named objects */
113 #define IP_FW_NAT64STL_CREATE 130 /* Create stateless NAT64 instance */
114 #define IP_FW_NAT64STL_DESTROY 131 /* Destroy stateless NAT64 instance */
115 #define IP_FW_NAT64STL_CONFIG 132 /* Modify stateless NAT64 instance */
116 #define IP_FW_NAT64STL_LIST 133 /* List stateless NAT64 instances */
117 #define IP_FW_NAT64STL_STATS 134 /* Get NAT64STL instance statistics */
118 #define IP_FW_NAT64STL_RESET_STATS 135 /* Reset NAT64STL instance statistics */
120 #define IP_FW_NAT64LSN_CREATE 140 /* Create stateful NAT64 instance */
121 #define IP_FW_NAT64LSN_DESTROY 141 /* Destroy stateful NAT64 instance */
122 #define IP_FW_NAT64LSN_CONFIG 142 /* Modify stateful NAT64 instance */
123 #define IP_FW_NAT64LSN_LIST 143 /* List stateful NAT64 instances */
124 #define IP_FW_NAT64LSN_STATS 144 /* Get NAT64LSN instance statistics */
125 #define IP_FW_NAT64LSN_LIST_STATES 145 /* Get stateful NAT64 states */
126 #define IP_FW_NAT64LSN_RESET_STATS 146 /* Reset NAT64LSN instance statistics */
128 #define IP_FW_NPTV6_CREATE 150 /* Create NPTv6 instance */
129 #define IP_FW_NPTV6_DESTROY 151 /* Destroy NPTv6 instance */
130 #define IP_FW_NPTV6_CONFIG 152 /* Modify NPTv6 instance */
131 #define IP_FW_NPTV6_LIST 153 /* List NPTv6 instances */
132 #define IP_FW_NPTV6_STATS 154 /* Get NPTv6 instance statistics */
133 #define IP_FW_NPTV6_RESET_STATS 155 /* Reset NPTv6 instance statistics */
136 * The kernel representation of ipfw rules is made of a list of
137 * 'instructions' (for all practical purposes equivalent to BPF
138 * instructions), which specify which fields of the packet
139 * (or its metadata) should be analysed.
141 * Each instruction is stored in a structure which begins with
142 * "ipfw_insn", and can contain extra fields depending on the
143 * instruction type (listed below).
144 * Note that the code is written so that individual instructions
145 * have a size which is a multiple of 32 bits. This means that, if
146 * such structures contain pointers or other 64-bit entities,
147 * (there is just one instance now) they may end up unaligned on
148 * 64-bit architectures, so the must be handled with care.
150 * "enum ipfw_opcodes" are the opcodes supported. We can have up
151 * to 256 different opcodes. When adding new opcodes, they should
152 * be appended to the end of the opcode list before O_LAST_OPCODE,
153 * this will prevent the ABI from being broken, otherwise users
154 * will have to recompile ipfw(8) when they update the kernel.
157 enum ipfw_opcodes { /* arguments (4 byte each) */
160 O_IP_SRC, /* u32 = IP */
161 O_IP_SRC_MASK, /* ip = IP/mask */
162 O_IP_SRC_ME, /* none */
163 O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */
165 O_IP_DST, /* u32 = IP */
166 O_IP_DST_MASK, /* ip = IP/mask */
167 O_IP_DST_ME, /* none */
168 O_IP_DST_SET, /* u32=base, arg1=len, bitmap */
170 O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */
171 O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */
172 O_PROTO, /* arg1=protocol */
174 O_MACADDR2, /* 2 mac addr:mask */
175 O_MAC_TYPE, /* same as srcport */
185 O_IPOPT, /* arg1 = 2*u8 bitmap */
186 O_IPLEN, /* arg1 = len */
187 O_IPID, /* arg1 = id */
189 O_IPTOS, /* arg1 = id */
190 O_IPPRECEDENCE, /* arg1 = precedence << 5 */
191 O_IPTTL, /* arg1 = TTL */
193 O_IPVER, /* arg1 = version */
194 O_UID, /* u32 = id */
195 O_GID, /* u32 = id */
196 O_ESTAB, /* none (tcp established) */
197 O_TCPFLAGS, /* arg1 = 2*u8 bitmap */
198 O_TCPWIN, /* arg1 = desired win */
199 O_TCPSEQ, /* u32 = desired seq. */
200 O_TCPACK, /* u32 = desired seq. */
201 O_ICMPTYPE, /* u32 = icmp bitmap */
202 O_TCPOPTS, /* arg1 = 2*u8 bitmap */
204 O_VERREVPATH, /* none */
205 O_VERSRCREACH, /* none */
207 O_PROBE_STATE, /* none */
208 O_KEEP_STATE, /* none */
209 O_LIMIT, /* ipfw_insn_limit */
210 O_LIMIT_PARENT, /* dyn_type, not an opcode. */
213 * These are really 'actions'.
216 O_LOG, /* ipfw_insn_log */
217 O_PROB, /* u32 = match probability */
219 O_CHECK_STATE, /* none */
222 O_REJECT, /* arg1=icmp arg (same as deny) */
224 O_SKIPTO, /* arg1=next rule number */
225 O_PIPE, /* arg1=pipe number */
226 O_QUEUE, /* arg1=queue number */
227 O_DIVERT, /* arg1=port number */
228 O_TEE, /* arg1=port number */
229 O_FORWARD_IP, /* fwd sockaddr */
230 O_FORWARD_MAC, /* fwd mac */
237 O_IPSEC, /* has ipsec history */
238 O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */
239 O_IP_DST_LOOKUP, /* arg1=table number, u32=value */
240 O_ANTISPOOF, /* none */
241 O_JAIL, /* u32 = id */
242 O_ALTQ, /* u32 = altq classif. qid */
243 O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */
244 O_TCPDATALEN, /* arg1 = tcp data len */
245 O_IP6_SRC, /* address without mask */
246 O_IP6_SRC_ME, /* my addresses */
247 O_IP6_SRC_MASK, /* address with the mask */
251 O_FLOW6ID, /* for flow id tag in the ipv6 pkt */
252 O_ICMP6TYPE, /* icmp6 packet type filtering */
253 O_EXT_HDR, /* filtering for ipv6 extension header */
257 * actions for ng_ipfw
259 O_NETGRAPH, /* send to ng_ipfw */
260 O_NGTEE, /* copy to ng_ipfw */
264 O_UNREACH6, /* arg1=icmpv6 code arg (deny) */
266 O_TAG, /* arg1=tag number */
267 O_TAGGED, /* arg1=tag number */
269 O_SETFIB, /* arg1=FIB number */
270 O_FIB, /* arg1=FIB desired fib number */
272 O_SOCKARG, /* socket argument */
274 O_CALLRETURN, /* arg1=called rule number */
276 O_FORWARD_IP6, /* fwd sockaddr_in6 */
278 O_DSCP, /* 2 u32 = DSCP mask */
279 O_SETDSCP, /* arg1=DSCP value */
280 O_IP_FLOW_LOOKUP, /* arg1=table number, u32=value */
282 O_EXTERNAL_ACTION, /* arg1=id of external action handler */
283 O_EXTERNAL_INSTANCE, /* arg1=id of eaction handler instance */
284 O_EXTERNAL_DATA, /* variable length data */
286 O_LAST_OPCODE /* not an opcode! */
290 * The extension header are filtered only for presence using a bit
291 * vector with a flag for each header.
293 #define EXT_FRAGMENT 0x1
294 #define EXT_HOPOPTS 0x2
295 #define EXT_ROUTING 0x4
298 #define EXT_DSTOPTS 0x20
299 #define EXT_RTHDR0 0x40
300 #define EXT_RTHDR2 0x80
303 * Template for instructions.
305 * ipfw_insn is used for all instructions which require no operands,
306 * a single 16-bit value (arg1), or a couple of 8-bit values.
308 * For other instructions which require different/larger arguments
309 * we have derived structures, ipfw_insn_*.
311 * The size of the instruction (in 32-bit words) is in the low
312 * 6 bits of "len". The 2 remaining bits are used to implement
313 * NOT and OR on individual instructions. Given a type, you can
314 * compute the length to be put in "len" using F_INSN_SIZE(t)
316 * F_NOT negates the match result of the instruction.
318 * F_OR is used to build or blocks. By default, instructions
319 * are evaluated as part of a logical AND. An "or" block
320 * { X or Y or Z } contains F_OR set in all but the last
321 * instruction of the block. A match will cause the code
322 * to skip past the last instruction of the block.
324 * NOTA BENE: in a couple of places we assume that
325 * sizeof(ipfw_insn) == sizeof(u_int32_t)
326 * this needs to be fixed.
329 typedef struct _ipfw_insn { /* template for instructions */
331 u_int8_t len; /* number of 32-bit words */
334 #define F_LEN_MASK 0x3f
335 #define F_LEN(cmd) ((cmd)->len & F_LEN_MASK)
341 * The F_INSN_SIZE(type) computes the size, in 4-byte words, of
344 #define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t))
347 * This is used to store an array of 16-bit entries (ports etc.)
349 typedef struct _ipfw_insn_u16 {
351 u_int16_t ports[2]; /* there may be more */
355 * This is used to store an array of 32-bit entries
356 * (uid, single IPv4 addresses etc.)
358 typedef struct _ipfw_insn_u32 {
360 u_int32_t d[1]; /* one or more */
364 * This is used to store IP addr-mask pairs.
366 typedef struct _ipfw_insn_ip {
373 * This is used to forward to a given address (ip).
375 typedef struct _ipfw_insn_sa {
377 struct sockaddr_in sa;
381 * This is used to forward to a given address (ipv6).
383 typedef struct _ipfw_insn_sa6 {
385 struct sockaddr_in6 sa;
389 * This is used for MAC addr-mask pairs.
391 typedef struct _ipfw_insn_mac {
393 u_char addr[12]; /* dst[6] + src[6] */
394 u_char mask[12]; /* dst[6] + src[6] */
398 * This is used for interface match rules (recv xx, xmit xx).
400 typedef struct _ipfw_insn_if {
411 * This is used for storing an altq queue id number.
413 typedef struct _ipfw_insn_altq {
419 * This is used for limit rules.
421 typedef struct _ipfw_insn_limit {
424 u_int8_t limit_mask; /* combination of DYN_* below */
425 #define DYN_SRC_ADDR 0x1
426 #define DYN_SRC_PORT 0x2
427 #define DYN_DST_ADDR 0x4
428 #define DYN_DST_PORT 0x8
430 u_int16_t conn_limit;
434 * This is used for log instructions.
436 typedef struct _ipfw_insn_log {
438 u_int32_t max_log; /* how many do we log -- 0 = all */
439 u_int32_t log_left; /* how many left to log */
442 /* Legacy NAT structures, compat only */
445 * Data structures required by both ipfw(8) and ipfw(4) but not part of the
446 * management API are protected by IPFW_INTERNAL.
449 /* Server pool support (LSNAT). */
451 LIST_ENTRY(cfg_spool) _next; /* chain of spool instances */
457 /* Redirect modes id. */
458 #define REDIR_ADDR 0x01
459 #define REDIR_PORT 0x02
460 #define REDIR_PROTO 0x04
463 /* Nat redirect configuration. */
465 LIST_ENTRY(cfg_redir) _next; /* chain of redir instances */
466 u_int16_t mode; /* type of redirect mode */
467 struct in_addr laddr; /* local ip address */
468 struct in_addr paddr; /* public ip address */
469 struct in_addr raddr; /* remote ip address */
470 u_short lport; /* local port */
471 u_short pport; /* public port */
472 u_short rport; /* remote port */
473 u_short pport_cnt; /* number of public ports */
474 u_short rport_cnt; /* number of remote ports */
475 int proto; /* protocol: tcp/udp */
476 struct alias_link **alink;
477 /* num of entry in spool chain */
479 /* chain of spool instances */
480 LIST_HEAD(spool_chain, cfg_spool) spool_chain;
485 /* Nat configuration data struct. */
487 /* chain of nat instances */
488 LIST_ENTRY(cfg_nat) _next;
490 struct in_addr ip; /* nat ip address */
491 char if_name[IF_NAMESIZE]; /* interface name */
492 int mode; /* aliasing mode */
493 struct libalias *lib; /* libalias instance */
494 /* number of entry in spool chain */
496 /* chain of redir instances */
497 LIST_HEAD(redir_chain, cfg_redir) redir_chain;
501 #define SOF_NAT sizeof(struct cfg_nat)
502 #define SOF_REDIR sizeof(struct cfg_redir)
503 #define SOF_SPOOL sizeof(struct cfg_spool)
505 #endif /* ifndef _KERNEL */
508 struct nat44_cfg_spool {
513 #define NAT44_REDIR_ADDR 0x01
514 #define NAT44_REDIR_PORT 0x02
515 #define NAT44_REDIR_PROTO 0x04
517 /* Nat redirect configuration. */
518 struct nat44_cfg_redir {
519 struct in_addr laddr; /* local ip address */
520 struct in_addr paddr; /* public ip address */
521 struct in_addr raddr; /* remote ip address */
522 uint16_t lport; /* local port */
523 uint16_t pport; /* public port */
524 uint16_t rport; /* remote port */
525 uint16_t pport_cnt; /* number of public ports */
526 uint16_t rport_cnt; /* number of remote ports */
527 uint16_t mode; /* type of redirect mode */
528 uint16_t spool_cnt; /* num of entry in spool chain */
530 uint32_t proto; /* protocol: tcp/udp */
533 /* Nat configuration data struct. */
534 struct nat44_cfg_nat {
535 char name[64]; /* nat name */
536 char if_name[64]; /* interface name */
537 uint32_t size; /* structure size incl. redirs */
538 struct in_addr ip; /* nat IPv4 address */
539 uint32_t mode; /* aliasing mode */
540 uint32_t redir_cnt; /* number of entry in spool chain */
544 typedef struct _ipfw_insn_nat {
549 /* Apply ipv6 mask on ipv6 addr */
550 #define APPLY_MASK(addr,mask) \
551 (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \
552 (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \
553 (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \
554 (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3];
556 /* Structure for ipv6 */
557 typedef struct _ipfw_insn_ip6 {
559 struct in6_addr addr6;
560 struct in6_addr mask6;
563 /* Used to support icmp6 types */
564 typedef struct _ipfw_insn_icmp6 {
566 uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h
567 * define ICMP6_MAXTYPE
568 * as follows: n = ICMP6_MAXTYPE/32 + 1
574 * Here we have the structure representing an ipfw rule.
578 * [ counter block, size = rule->cntr_len ]
579 * [ one or more instructions, size = rule->cmd_len * 4 ]
581 * It starts with a general area (with link fields).
582 * Counter block may be next (if rule->cntr_len > 0),
583 * followed by an array of one or more instructions, which the code
584 * accesses as an array of 32-bit values. rule->cmd_len represents
585 * the total instructions legth in u32 worrd, while act_ofs represents
586 * rule action offset in u32 words.
588 * When assembling instruction, remember the following:
590 * + if a rule has a "keep-state" (or "limit") option, then the
591 * first instruction (at r->cmd) MUST BE an O_PROBE_STATE
592 * + if a rule has a "log" option, then the first action
593 * (at ACTION_PTR(r)) MUST be O_LOG
594 * + if a rule has an "altq" option, it comes after "log"
595 * + if a rule has an O_TAG option, it comes after "log" and "altq"
598 * All structures (excluding instructions) are u64-aligned.
603 uint16_t act_ofs; /* offset of action in 32-bit units */
604 uint16_t cmd_len; /* # of 32-bit words in cmd */
606 uint8_t set; /* rule set (0..31) */
607 uint8_t flags; /* rule flags */
608 uint32_t rulenum; /* rule number */
609 uint32_t id; /* rule id */
611 ipfw_insn cmd[1]; /* storage for commands */
613 #define IPFW_RULE_NOOPT 0x01 /* Has no options in body */
615 /* Unaligned version */
617 /* Base ipfw rule counter block. */
618 struct ip_fw_bcounter {
619 uint16_t size; /* Size of counter block, bytes */
620 uint8_t flags; /* flags for given block */
622 uint32_t timestamp; /* tv_sec of last match */
623 uint64_t pcnt; /* Packet counter */
624 uint64_t bcnt; /* Byte counter */
633 struct ip_fw *x_next; /* linked list of rules */
634 struct ip_fw *next_rule; /* ptr to next [skipto] rule */
635 /* 'next_rule' is used to pass up 'set_disable' status */
637 uint16_t act_ofs; /* offset of action in 32-bit units */
638 uint16_t cmd_len; /* # of 32-bit words in cmd */
639 uint16_t rulenum; /* rule number */
640 uint8_t set; /* rule set (0..31) */
641 uint8_t _pad; /* padding */
642 uint32_t id; /* rule id */
644 /* These fields are present in all rules. */
645 uint64_t pcnt; /* Packet counter */
646 uint64_t bcnt; /* Byte counter */
647 uint32_t timestamp; /* tv_sec of last match */
649 ipfw_insn cmd[1]; /* storage for commands */
653 #define ACTION_PTR(rule) \
654 (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) )
656 #define RULESIZE(rule) (sizeof(*(rule)) + (rule)->cmd_len * 4 - 4)
659 #if 1 // should be moved to in.h
661 * This structure is used as a flow mask and a flow id for various
663 * addr_type is used in userland and kernel to mark the address type.
664 * fib is used in the kernel to record the fib in use.
665 * _flags is used in the kernel to store tcp flags for dynamic rules.
667 struct ipfw_flow_id {
674 uint8_t _flags; /* protocol-specific flags */
675 uint8_t addr_type; /* 4=ip4, 6=ip6, 1=ether ? */
676 struct in6_addr dst_ip6;
677 struct in6_addr src_ip6;
679 uint32_t extra; /* queue/pipe or frag_id */
683 #define IS_IP6_FLOW_ID(id) ((id)->addr_type == 6)
688 typedef struct _ipfw_dyn_rule ipfw_dyn_rule;
690 struct _ipfw_dyn_rule {
691 ipfw_dyn_rule *next; /* linked list of rules. */
692 struct ip_fw *rule; /* pointer to rule */
693 /* 'rule' is used to pass up the rule number (from the parent) */
695 ipfw_dyn_rule *parent; /* pointer to parent rule */
696 u_int64_t pcnt; /* packet match counter */
697 u_int64_t bcnt; /* byte match counter */
698 struct ipfw_flow_id id; /* (masked) flow id */
699 u_int32_t expire; /* expire time */
700 u_int32_t bucket; /* which bucket in hash table */
701 u_int32_t state; /* state of this rule (typically a
702 * combination of TCP flags)
704 u_int32_t ack_fwd; /* most recent ACKs in forward */
705 u_int32_t ack_rev; /* and reverse directions (used */
706 /* to generate keepalives) */
707 u_int16_t dyn_type; /* rule type */
708 u_int16_t count; /* refcount */
709 u_int16_t kidx; /* index of named object */
710 } __packed __aligned(8);
713 * Definitions for IP option names.
715 #define IP_FW_IPOPT_LSRR 0x01
716 #define IP_FW_IPOPT_SSRR 0x02
717 #define IP_FW_IPOPT_RR 0x04
718 #define IP_FW_IPOPT_TS 0x08
721 * Definitions for TCP option names.
723 #define IP_FW_TCPOPT_MSS 0x01
724 #define IP_FW_TCPOPT_WINDOW 0x02
725 #define IP_FW_TCPOPT_SACK 0x04
726 #define IP_FW_TCPOPT_TS 0x08
727 #define IP_FW_TCPOPT_CC 0x10
729 #define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */
730 #define ICMP6_UNREACH_RST 0x100 /* fake ICMPv6 code (send a TCP RST) */
733 * These are used for lookup tables.
736 #define IPFW_TABLE_ADDR 1 /* Table for holding IPv4/IPv6 prefixes */
737 #define IPFW_TABLE_INTERFACE 2 /* Table for holding interface names */
738 #define IPFW_TABLE_NUMBER 3 /* Table for holding ports/uid/gid/etc */
739 #define IPFW_TABLE_FLOW 4 /* Table for holding flow data */
740 #define IPFW_TABLE_MAXTYPE 4 /* Maximum valid number */
742 #define IPFW_TABLE_CIDR IPFW_TABLE_ADDR /* compat */
745 #define IPFW_VTYPE_LEGACY 0xFFFFFFFF /* All data is filled in */
746 #define IPFW_VTYPE_SKIPTO 0x00000001 /* skipto/call/callreturn */
747 #define IPFW_VTYPE_PIPE 0x00000002 /* pipe/queue */
748 #define IPFW_VTYPE_FIB 0x00000004 /* setfib */
749 #define IPFW_VTYPE_NAT 0x00000008 /* nat */
750 #define IPFW_VTYPE_DSCP 0x00000010 /* dscp */
751 #define IPFW_VTYPE_TAG 0x00000020 /* tag/untag */
752 #define IPFW_VTYPE_DIVERT 0x00000040 /* divert/tee */
753 #define IPFW_VTYPE_NETGRAPH 0x00000080 /* netgraph/ngtee */
754 #define IPFW_VTYPE_LIMIT 0x00000100 /* limit */
755 #define IPFW_VTYPE_NH4 0x00000200 /* IPv4 nexthop */
756 #define IPFW_VTYPE_NH6 0x00000400 /* IPv6 nexthop */
758 typedef struct _ipfw_table_entry {
759 in_addr_t addr; /* network address */
760 u_int32_t value; /* value */
761 u_int16_t tbl; /* table number */
762 u_int8_t masklen; /* mask length */
765 typedef struct _ipfw_table_xentry {
766 uint16_t len; /* Total entry length */
767 uint8_t type; /* entry type */
768 uint8_t masklen; /* mask length */
769 uint16_t tbl; /* table number */
770 uint16_t flags; /* record flags */
771 uint32_t value; /* value */
773 /* Longest field needs to be aligned by 4-byte boundary */
774 struct in6_addr addr6; /* IPv6 address */
775 char iface[IF_NAMESIZE]; /* interface name */
778 #define IPFW_TCF_INET 0x01 /* CIDR flags: IPv4 record */
780 typedef struct _ipfw_table {
781 u_int32_t size; /* size of entries in bytes */
782 u_int32_t cnt; /* # of entries */
783 u_int16_t tbl; /* table number */
784 ipfw_table_entry ent[0]; /* entries */
787 typedef struct _ipfw_xtable {
788 ip_fw3_opheader opheader; /* IP_FW3 opcode */
789 uint32_t size; /* size of entries in bytes */
790 uint32_t cnt; /* # of entries */
791 uint16_t tbl; /* table number */
792 uint8_t type; /* table type */
793 ipfw_table_xentry xent[0]; /* entries */
796 typedef struct _ipfw_obj_tlv {
797 uint16_t type; /* TLV type */
798 uint16_t flags; /* TLV-specific flags */
799 uint32_t length; /* Total length, aligned to u64 */
801 #define IPFW_TLV_TBL_NAME 1
802 #define IPFW_TLV_TBLNAME_LIST 2
803 #define IPFW_TLV_RULE_LIST 3
804 #define IPFW_TLV_DYNSTATE_LIST 4
805 #define IPFW_TLV_TBL_ENT 5
806 #define IPFW_TLV_DYN_ENT 6
807 #define IPFW_TLV_RULE_ENT 7
808 #define IPFW_TLV_TBLENT_LIST 8
809 #define IPFW_TLV_RANGE 9
810 #define IPFW_TLV_EACTION 10
811 #define IPFW_TLV_COUNTERS 11
812 #define IPFW_TLV_OBJDATA 12
813 #define IPFW_TLV_STATE_NAME 14
815 #define IPFW_TLV_EACTION_BASE 1000
816 #define IPFW_TLV_EACTION_NAME(arg) (IPFW_TLV_EACTION_BASE + (arg))
818 typedef struct _ipfw_obj_data {
823 /* Object name TLV */
824 typedef struct _ipfw_obj_ntlv {
825 ipfw_obj_tlv head; /* TLV header */
826 uint16_t idx; /* Name index */
827 uint8_t set; /* set, if applicable */
828 uint8_t type; /* object type, if applicable */
829 uint32_t spare; /* unused */
830 char name[64]; /* Null-terminated name */
833 /* IPv4/IPv6 L4 flow description */
846 struct in6_addr sip6;
847 struct in6_addr dip6;
852 typedef struct _ipfw_table_value {
853 uint32_t tag; /* O_TAG/O_TAGGED */
854 uint32_t pipe; /* O_PIPE/O_QUEUE */
855 uint16_t divert; /* O_DIVERT/O_TEE */
856 uint16_t skipto; /* skipto, CALLRET */
857 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
858 uint32_t fib; /* O_SETFIB */
859 uint32_t nat; /* O_NAT */
865 uint32_t limit; /* O_LIMIT */
866 uint32_t zoneid; /* scope zone id for nh6 */
870 /* Table entry TLV */
871 typedef struct _ipfw_obj_tentry {
872 ipfw_obj_tlv head; /* TLV header */
873 uint8_t subtype; /* subtype (IPv4,IPv6) */
874 uint8_t masklen; /* mask length */
875 uint8_t result; /* request result */
877 uint16_t idx; /* Table name index */
880 /* Longest field needs to be aligned by 8-byte boundary */
881 struct in_addr addr; /* IPv4 address */
882 uint32_t key; /* uid/gid/port */
883 struct in6_addr addr6; /* IPv6 address */
884 char iface[IF_NAMESIZE]; /* interface name */
885 struct tflow_entry flow;
888 ipfw_table_value value; /* value data */
889 uint32_t kidx; /* value kernel index */
892 #define IPFW_TF_UPDATE 0x01 /* Update record if exists */
894 #define IPFW_CTF_ATOMIC 0x01 /* Perform atomic operation */
895 /* Operation results */
896 #define IPFW_TR_IGNORED 0 /* Entry was ignored (rollback) */
897 #define IPFW_TR_ADDED 1 /* Entry was successfully added */
898 #define IPFW_TR_UPDATED 2 /* Entry was successfully updated*/
899 #define IPFW_TR_DELETED 3 /* Entry was successfully deleted*/
900 #define IPFW_TR_LIMIT 4 /* Entry was ignored (limit) */
901 #define IPFW_TR_NOTFOUND 5 /* Entry was not found */
902 #define IPFW_TR_EXISTS 6 /* Entry already exists */
903 #define IPFW_TR_ERROR 7 /* Request has failed (unknown) */
905 typedef struct _ipfw_obj_dyntlv {
909 #define IPFW_DF_LAST 0x01 /* Last state in chain */
911 /* Containter TLVs */
912 typedef struct _ipfw_obj_ctlv {
913 ipfw_obj_tlv head; /* TLV header */
914 uint32_t count; /* Number of sub-TLVs */
915 uint16_t objsize; /* Single object size */
916 uint8_t version; /* TLV version */
917 uint8_t flags; /* TLV-specific flags */
921 typedef struct _ipfw_range_tlv {
922 ipfw_obj_tlv head; /* TLV header */
923 uint32_t flags; /* Range flags */
924 uint16_t start_rule; /* Range start */
925 uint16_t end_rule; /* Range end */
926 uint32_t set; /* Range set to match */
927 uint32_t new_set; /* New set to move/swap to */
929 #define IPFW_RCFLAG_RANGE 0x01 /* rule range is set */
930 #define IPFW_RCFLAG_ALL 0x02 /* match ALL rules */
931 #define IPFW_RCFLAG_SET 0x04 /* match rules in given set */
932 /* User-settable flags */
933 #define IPFW_RCFLAG_USER (IPFW_RCFLAG_RANGE | IPFW_RCFLAG_ALL | \
935 /* Internally used flags */
936 #define IPFW_RCFLAG_DEFAULT 0x0100 /* Do not skip defaul rule */
938 typedef struct _ipfw_ta_tinfo {
939 uint32_t flags; /* Format flags */
941 uint8_t taclass4; /* algorithm class */
943 uint16_t itemsize4; /* item size in runtime */
944 uint32_t size4; /* runtime structure size */
945 uint32_t count4; /* number of items in runtime */
946 uint8_t taclass6; /* algorithm class */
948 uint16_t itemsize6; /* item size in runtime */
949 uint32_t size6; /* runtime structure size */
950 uint32_t count6; /* number of items in runtime */
952 #define IPFW_TACLASS_HASH 1 /* algo is based on hash */
953 #define IPFW_TACLASS_ARRAY 2 /* algo is based on array */
954 #define IPFW_TACLASS_RADIX 3 /* algo is based on radix tree */
956 #define IPFW_TATFLAGS_DATA 0x0001 /* Has data filled in */
957 #define IPFW_TATFLAGS_AFDATA 0x0002 /* Separate data per AF */
958 #define IPFW_TATFLAGS_AFITEM 0x0004 /* diff. items per AF */
960 typedef struct _ipfw_xtable_info {
961 uint8_t type; /* table type (addr,iface,..) */
962 uint8_t tflags; /* type flags */
963 uint16_t mflags; /* modification flags */
964 uint16_t flags; /* generic table flags */
966 uint32_t vmask; /* bitmask with value types */
967 uint32_t set; /* set table is in */
968 uint32_t kidx; /* kernel index */
969 uint32_t refcnt; /* number of references */
970 uint32_t count; /* Number of records */
971 uint32_t size; /* Total size of records(export)*/
972 uint32_t limit; /* Max number of records */
973 char tablename[64]; /* table name */
974 char algoname[64]; /* algorithm name */
975 ipfw_ta_tinfo ta_info; /* additional algo stats */
977 /* Generic table flags */
978 #define IPFW_TGFLAGS_LOCKED 0x01 /* Tables is locked from changes*/
979 /* Table type-specific flags */
980 #define IPFW_TFFLAG_SRCIP 0x01
981 #define IPFW_TFFLAG_DSTIP 0x02
982 #define IPFW_TFFLAG_SRCPORT 0x04
983 #define IPFW_TFFLAG_DSTPORT 0x08
984 #define IPFW_TFFLAG_PROTO 0x10
985 /* Table modification flags */
986 #define IPFW_TMFLAGS_LIMIT 0x0002 /* Change limit value */
987 #define IPFW_TMFLAGS_LOCK 0x0004 /* Change table lock state */
989 typedef struct _ipfw_iface_info {
990 char ifname[64]; /* interface name */
991 uint32_t ifindex; /* interface index */
992 uint32_t flags; /* flags */
993 uint32_t refcnt; /* number of references */
994 uint32_t gencnt; /* number of changes */
997 #define IPFW_IFFLAG_RESOLVED 0x01 /* Interface exists */
999 typedef struct _ipfw_ta_info {
1000 char algoname[64]; /* algorithm name */
1001 uint32_t type; /* lookup type */
1008 typedef struct _ipfw_obj_header {
1009 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1011 uint16_t idx; /* object name index */
1012 uint8_t objtype; /* object type */
1013 uint8_t objsubtype; /* object subtype */
1014 ipfw_obj_ntlv ntlv; /* object name tlv */
1017 typedef struct _ipfw_obj_lheader {
1018 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1019 uint32_t set_mask; /* disabled set mask */
1020 uint32_t count; /* Total objects count */
1021 uint32_t size; /* Total size (incl. header) */
1022 uint32_t objsize; /* Size of one object */
1025 #define IPFW_CFG_GET_STATIC 0x01
1026 #define IPFW_CFG_GET_STATES 0x02
1027 #define IPFW_CFG_GET_COUNTERS 0x04
1028 typedef struct _ipfw_cfg_lheader {
1029 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1030 uint32_t set_mask; /* enabled set mask */
1032 uint32_t flags; /* Request flags */
1033 uint32_t size; /* neded buffer size */
1034 uint32_t start_rule;
1038 typedef struct _ipfw_range_header {
1039 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1040 ipfw_range_tlv range;
1041 } ipfw_range_header;
1043 typedef struct _ipfw_sopt_info {
1051 #endif /* _IPFW2_H */