FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_fw.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: releng/12.0/sys/netinet/ip_fw.h 336132 2018-07-09 11:35:18Z ae $
28 */
29
30 #ifndef _IPFW2_H
31 #define _IPFW2_H
32
33 /*
34 * The default rule number. By the design of ip_fw, the default rule
35 * is the last one, so its number can also serve as the highest number
36 * allowed for a rule. The ip_fw code relies on both meanings of this
37 * constant.
38 */
39 #define IPFW_DEFAULT_RULE 65535
40
41 #define RESVD_SET 31 /*set for default and persistent rules*/
42 #define IPFW_MAX_SETS 32 /* Number of sets supported by ipfw*/
43
44 /*
45 * Compat values for old clients
46 */
47 #ifndef _KERNEL
48 #define IPFW_TABLES_MAX 65535
49 #define IPFW_TABLES_DEFAULT 128
50 #endif
51
52 /*
53 * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit
54 * argument between 1 and 65534. The value 0 (IP_FW_TARG) is used
55 * to represent 'tablearg' value, e.g. indicate the use of a 'tablearg'
56 * result of the most recent table() lookup.
57 * Note that 16bit is only a historical limit, resulting from
58 * the use of a 16-bit fields for that value. In reality, we can have
59 * 2^32 pipes, queues, tag values and so on.
60 */
61 #define IPFW_ARG_MIN 1
62 #define IPFW_ARG_MAX 65534
63 #define IP_FW_TABLEARG 65535 /* Compat value for old clients */
64 #define IP_FW_TARG 0 /* Current tablearg value */
65 #define IP_FW_NAT44_GLOBAL 65535 /* arg1 value for "nat global" */
66
67 /*
68 * Number of entries in the call stack of the call/return commands.
69 * Call stack currently is an uint16_t array with rule numbers.
70 */
71 #define IPFW_CALLSTACK_SIZE 16
72
73 /* IP_FW3 header/opcodes */
74 typedef struct _ip_fw3_opheader {
75 uint16_t opcode; /* Operation opcode */
76 uint16_t version; /* Opcode version */
77 uint16_t reserved[2]; /* Align to 64-bit boundary */
78 } ip_fw3_opheader;
79
80 /* IP_FW3 opcodes */
81 #define IP_FW_TABLE_XADD 86 /* add entry */
82 #define IP_FW_TABLE_XDEL 87 /* delete entry */
83 #define IP_FW_TABLE_XGETSIZE 88 /* get table size (deprecated) */
84 #define IP_FW_TABLE_XLIST 89 /* list table contents */
85 #define IP_FW_TABLE_XDESTROY 90 /* destroy table */
86 #define IP_FW_TABLES_XLIST 92 /* list all tables */
87 #define IP_FW_TABLE_XINFO 93 /* request info for one table */
88 #define IP_FW_TABLE_XFLUSH 94 /* flush table data */
89 #define IP_FW_TABLE_XCREATE 95 /* create new table */
90 #define IP_FW_TABLE_XMODIFY 96 /* modify existing table */
91 #define IP_FW_XGET 97 /* Retrieve configuration */
92 #define IP_FW_XADD 98 /* add rule */
93 #define IP_FW_XDEL 99 /* del rule */
94 #define IP_FW_XMOVE 100 /* move rules to different set */
95 #define IP_FW_XZERO 101 /* clear accounting */
96 #define IP_FW_XRESETLOG 102 /* zero rules logs */
97 #define IP_FW_SET_SWAP 103 /* Swap between 2 sets */
98 #define IP_FW_SET_MOVE 104 /* Move one set to another one */
99 #define IP_FW_SET_ENABLE 105 /* Enable/disable sets */
100 #define IP_FW_TABLE_XFIND 106 /* finds an entry */
101 #define IP_FW_XIFLIST 107 /* list tracked interfaces */
102 #define IP_FW_TABLES_ALIST 108 /* list table algorithms */
103 #define IP_FW_TABLE_XSWAP 109 /* swap two tables */
104 #define IP_FW_TABLE_VLIST 110 /* dump table value hash */
105
106 #define IP_FW_NAT44_XCONFIG 111 /* Create/modify NAT44 instance */
107 #define IP_FW_NAT44_DESTROY 112 /* Destroys NAT44 instance */
108 #define IP_FW_NAT44_XGETCONFIG 113 /* Get NAT44 instance config */
109 #define IP_FW_NAT44_LIST_NAT 114 /* List all NAT44 instances */
110 #define IP_FW_NAT44_XGETLOG 115 /* Get log from NAT44 instance */
111
112 #define IP_FW_DUMP_SOPTCODES 116 /* Dump available sopts/versions */
113 #define IP_FW_DUMP_SRVOBJECTS 117 /* Dump existing named objects */
114
115 #define IP_FW_NAT64STL_CREATE 130 /* Create stateless NAT64 instance */
116 #define IP_FW_NAT64STL_DESTROY 131 /* Destroy stateless NAT64 instance */
117 #define IP_FW_NAT64STL_CONFIG 132 /* Modify stateless NAT64 instance */
118 #define IP_FW_NAT64STL_LIST 133 /* List stateless NAT64 instances */
119 #define IP_FW_NAT64STL_STATS 134 /* Get NAT64STL instance statistics */
120 #define IP_FW_NAT64STL_RESET_STATS 135 /* Reset NAT64STL instance statistics */
121
122 #define IP_FW_NAT64LSN_CREATE 140 /* Create stateful NAT64 instance */
123 #define IP_FW_NAT64LSN_DESTROY 141 /* Destroy stateful NAT64 instance */
124 #define IP_FW_NAT64LSN_CONFIG 142 /* Modify stateful NAT64 instance */
125 #define IP_FW_NAT64LSN_LIST 143 /* List stateful NAT64 instances */
126 #define IP_FW_NAT64LSN_STATS 144 /* Get NAT64LSN instance statistics */
127 #define IP_FW_NAT64LSN_LIST_STATES 145 /* Get stateful NAT64 states */
128 #define IP_FW_NAT64LSN_RESET_STATS 146 /* Reset NAT64LSN instance statistics */
129
130 #define IP_FW_NPTV6_CREATE 150 /* Create NPTv6 instance */
131 #define IP_FW_NPTV6_DESTROY 151 /* Destroy NPTv6 instance */
132 #define IP_FW_NPTV6_CONFIG 152 /* Modify NPTv6 instance */
133 #define IP_FW_NPTV6_LIST 153 /* List NPTv6 instances */
134 #define IP_FW_NPTV6_STATS 154 /* Get NPTv6 instance statistics */
135 #define IP_FW_NPTV6_RESET_STATS 155 /* Reset NPTv6 instance statistics */
136
137 /*
138 * The kernel representation of ipfw rules is made of a list of
139 * 'instructions' (for all practical purposes equivalent to BPF
140 * instructions), which specify which fields of the packet
141 * (or its metadata) should be analysed.
142 *
143 * Each instruction is stored in a structure which begins with
144 * "ipfw_insn", and can contain extra fields depending on the
145 * instruction type (listed below).
146 * Note that the code is written so that individual instructions
147 * have a size which is a multiple of 32 bits. This means that, if
148 * such structures contain pointers or other 64-bit entities,
149 * (there is just one instance now) they may end up unaligned on
150 * 64-bit architectures, so the must be handled with care.
151 *
152 * "enum ipfw_opcodes" are the opcodes supported. We can have up
153 * to 256 different opcodes. When adding new opcodes, they should
154 * be appended to the end of the opcode list before O_LAST_OPCODE,
155 * this will prevent the ABI from being broken, otherwise users
156 * will have to recompile ipfw(8) when they update the kernel.
157 */
158
159 enum ipfw_opcodes { /* arguments (4 byte each) */
160 O_NOP,
161
162 O_IP_SRC, /* u32 = IP */
163 O_IP_SRC_MASK, /* ip = IP/mask */
164 O_IP_SRC_ME, /* none */
165 O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */
166
167 O_IP_DST, /* u32 = IP */
168 O_IP_DST_MASK, /* ip = IP/mask */
169 O_IP_DST_ME, /* none */
170 O_IP_DST_SET, /* u32=base, arg1=len, bitmap */
171
172 O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */
173 O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */
174 O_PROTO, /* arg1=protocol */
175
176 O_MACADDR2, /* 2 mac addr:mask */
177 O_MAC_TYPE, /* same as srcport */
178
179 O_LAYER2, /* none */
180 O_IN, /* none */
181 O_FRAG, /* none */
182
183 O_RECV, /* none */
184 O_XMIT, /* none */
185 O_VIA, /* none */
186
187 O_IPOPT, /* arg1 = 2*u8 bitmap */
188 O_IPLEN, /* arg1 = len */
189 O_IPID, /* arg1 = id */
190
191 O_IPTOS, /* arg1 = id */
192 O_IPPRECEDENCE, /* arg1 = precedence << 5 */
193 O_IPTTL, /* arg1 = TTL */
194
195 O_IPVER, /* arg1 = version */
196 O_UID, /* u32 = id */
197 O_GID, /* u32 = id */
198 O_ESTAB, /* none (tcp established) */
199 O_TCPFLAGS, /* arg1 = 2*u8 bitmap */
200 O_TCPWIN, /* arg1 = desired win */
201 O_TCPSEQ, /* u32 = desired seq. */
202 O_TCPACK, /* u32 = desired seq. */
203 O_ICMPTYPE, /* u32 = icmp bitmap */
204 O_TCPOPTS, /* arg1 = 2*u8 bitmap */
205
206 O_VERREVPATH, /* none */
207 O_VERSRCREACH, /* none */
208
209 O_PROBE_STATE, /* none */
210 O_KEEP_STATE, /* none */
211 O_LIMIT, /* ipfw_insn_limit */
212 O_LIMIT_PARENT, /* dyn_type, not an opcode. */
213
214 /*
215 * These are really 'actions'.
216 */
217
218 O_LOG, /* ipfw_insn_log */
219 O_PROB, /* u32 = match probability */
220
221 O_CHECK_STATE, /* none */
222 O_ACCEPT, /* none */
223 O_DENY, /* none */
224 O_REJECT, /* arg1=icmp arg (same as deny) */
225 O_COUNT, /* none */
226 O_SKIPTO, /* arg1=next rule number */
227 O_PIPE, /* arg1=pipe number */
228 O_QUEUE, /* arg1=queue number */
229 O_DIVERT, /* arg1=port number */
230 O_TEE, /* arg1=port number */
231 O_FORWARD_IP, /* fwd sockaddr */
232 O_FORWARD_MAC, /* fwd mac */
233 O_NAT, /* nope */
234 O_REASS, /* none */
235
236 /*
237 * More opcodes.
238 */
239 O_IPSEC, /* has ipsec history */
240 O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */
241 O_IP_DST_LOOKUP, /* arg1=table number, u32=value */
242 O_ANTISPOOF, /* none */
243 O_JAIL, /* u32 = id */
244 O_ALTQ, /* u32 = altq classif. qid */
245 O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */
246 O_TCPDATALEN, /* arg1 = tcp data len */
247 O_IP6_SRC, /* address without mask */
248 O_IP6_SRC_ME, /* my addresses */
249 O_IP6_SRC_MASK, /* address with the mask */
250 O_IP6_DST,
251 O_IP6_DST_ME,
252 O_IP6_DST_MASK,
253 O_FLOW6ID, /* for flow id tag in the ipv6 pkt */
254 O_ICMP6TYPE, /* icmp6 packet type filtering */
255 O_EXT_HDR, /* filtering for ipv6 extension header */
256 O_IP6,
257
258 /*
259 * actions for ng_ipfw
260 */
261 O_NETGRAPH, /* send to ng_ipfw */
262 O_NGTEE, /* copy to ng_ipfw */
263
264 O_IP4,
265
266 O_UNREACH6, /* arg1=icmpv6 code arg (deny) */
267
268 O_TAG, /* arg1=tag number */
269 O_TAGGED, /* arg1=tag number */
270
271 O_SETFIB, /* arg1=FIB number */
272 O_FIB, /* arg1=FIB desired fib number */
273
274 O_SOCKARG, /* socket argument */
275
276 O_CALLRETURN, /* arg1=called rule number */
277
278 O_FORWARD_IP6, /* fwd sockaddr_in6 */
279
280 O_DSCP, /* 2 u32 = DSCP mask */
281 O_SETDSCP, /* arg1=DSCP value */
282 O_IP_FLOW_LOOKUP, /* arg1=table number, u32=value */
283
284 O_EXTERNAL_ACTION, /* arg1=id of external action handler */
285 O_EXTERNAL_INSTANCE, /* arg1=id of eaction handler instance */
286 O_EXTERNAL_DATA, /* variable length data */
287
288 O_SKIP_ACTION, /* none */
289
290 O_LAST_OPCODE /* not an opcode! */
291 };
292
293 /*
294 * The extension header are filtered only for presence using a bit
295 * vector with a flag for each header.
296 */
297 #define EXT_FRAGMENT 0x1
298 #define EXT_HOPOPTS 0x2
299 #define EXT_ROUTING 0x4
300 #define EXT_AH 0x8
301 #define EXT_ESP 0x10
302 #define EXT_DSTOPTS 0x20
303 #define EXT_RTHDR0 0x40
304 #define EXT_RTHDR2 0x80
305
306 /*
307 * Template for instructions.
308 *
309 * ipfw_insn is used for all instructions which require no operands,
310 * a single 16-bit value (arg1), or a couple of 8-bit values.
311 *
312 * For other instructions which require different/larger arguments
313 * we have derived structures, ipfw_insn_*.
314 *
315 * The size of the instruction (in 32-bit words) is in the low
316 * 6 bits of "len". The 2 remaining bits are used to implement
317 * NOT and OR on individual instructions. Given a type, you can
318 * compute the length to be put in "len" using F_INSN_SIZE(t)
319 *
320 * F_NOT negates the match result of the instruction.
321 *
322 * F_OR is used to build or blocks. By default, instructions
323 * are evaluated as part of a logical AND. An "or" block
324 * { X or Y or Z } contains F_OR set in all but the last
325 * instruction of the block. A match will cause the code
326 * to skip past the last instruction of the block.
327 *
328 * NOTA BENE: in a couple of places we assume that
329 * sizeof(ipfw_insn) == sizeof(u_int32_t)
330 * this needs to be fixed.
331 *
332 */
333 typedef struct _ipfw_insn { /* template for instructions */
334 u_int8_t opcode;
335 u_int8_t len; /* number of 32-bit words */
336 #define F_NOT 0x80
337 #define F_OR 0x40
338 #define F_LEN_MASK 0x3f
339 #define F_LEN(cmd) ((cmd)->len & F_LEN_MASK)
340
341 u_int16_t arg1;
342 } ipfw_insn;
343
344 /*
345 * The F_INSN_SIZE(type) computes the size, in 4-byte words, of
346 * a given type.
347 */
348 #define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t))
349
350 /*
351 * This is used to store an array of 16-bit entries (ports etc.)
352 */
353 typedef struct _ipfw_insn_u16 {
354 ipfw_insn o;
355 u_int16_t ports[2]; /* there may be more */
356 } ipfw_insn_u16;
357
358 /*
359 * This is used to store an array of 32-bit entries
360 * (uid, single IPv4 addresses etc.)
361 */
362 typedef struct _ipfw_insn_u32 {
363 ipfw_insn o;
364 u_int32_t d[1]; /* one or more */
365 } ipfw_insn_u32;
366
367 /*
368 * This is used to store IP addr-mask pairs.
369 */
370 typedef struct _ipfw_insn_ip {
371 ipfw_insn o;
372 struct in_addr addr;
373 struct in_addr mask;
374 } ipfw_insn_ip;
375
376 /*
377 * This is used to forward to a given address (ip).
378 */
379 typedef struct _ipfw_insn_sa {
380 ipfw_insn o;
381 struct sockaddr_in sa;
382 } ipfw_insn_sa;
383
384 /*
385 * This is used to forward to a given address (ipv6).
386 */
387 typedef struct _ipfw_insn_sa6 {
388 ipfw_insn o;
389 struct sockaddr_in6 sa;
390 } ipfw_insn_sa6;
391
392 /*
393 * This is used for MAC addr-mask pairs.
394 */
395 typedef struct _ipfw_insn_mac {
396 ipfw_insn o;
397 u_char addr[12]; /* dst[6] + src[6] */
398 u_char mask[12]; /* dst[6] + src[6] */
399 } ipfw_insn_mac;
400
401 /*
402 * This is used for interface match rules (recv xx, xmit xx).
403 */
404 typedef struct _ipfw_insn_if {
405 ipfw_insn o;
406 union {
407 struct in_addr ip;
408 int glob;
409 uint16_t kidx;
410 } p;
411 char name[IFNAMSIZ];
412 } ipfw_insn_if;
413
414 /*
415 * This is used for storing an altq queue id number.
416 */
417 typedef struct _ipfw_insn_altq {
418 ipfw_insn o;
419 u_int32_t qid;
420 } ipfw_insn_altq;
421
422 /*
423 * This is used for limit rules.
424 */
425 typedef struct _ipfw_insn_limit {
426 ipfw_insn o;
427 u_int8_t _pad;
428 u_int8_t limit_mask; /* combination of DYN_* below */
429 #define DYN_SRC_ADDR 0x1
430 #define DYN_SRC_PORT 0x2
431 #define DYN_DST_ADDR 0x4
432 #define DYN_DST_PORT 0x8
433
434 u_int16_t conn_limit;
435 } ipfw_insn_limit;
436
437 /*
438 * This is used for log instructions.
439 */
440 typedef struct _ipfw_insn_log {
441 ipfw_insn o;
442 u_int32_t max_log; /* how many do we log -- 0 = all */
443 u_int32_t log_left; /* how many left to log */
444 } ipfw_insn_log;
445
446 /* Legacy NAT structures, compat only */
447 #ifndef _KERNEL
448 /*
449 * Data structures required by both ipfw(8) and ipfw(4) but not part of the
450 * management API are protected by IPFW_INTERNAL.
451 */
452 #ifdef IPFW_INTERNAL
453 /* Server pool support (LSNAT). */
454 struct cfg_spool {
455 LIST_ENTRY(cfg_spool) _next; /* chain of spool instances */
456 struct in_addr addr;
457 u_short port;
458 };
459 #endif
460
461 /* Redirect modes id. */
462 #define REDIR_ADDR 0x01
463 #define REDIR_PORT 0x02
464 #define REDIR_PROTO 0x04
465
466 #ifdef IPFW_INTERNAL
467 /* Nat redirect configuration. */
468 struct cfg_redir {
469 LIST_ENTRY(cfg_redir) _next; /* chain of redir instances */
470 u_int16_t mode; /* type of redirect mode */
471 struct in_addr laddr; /* local ip address */
472 struct in_addr paddr; /* public ip address */
473 struct in_addr raddr; /* remote ip address */
474 u_short lport; /* local port */
475 u_short pport; /* public port */
476 u_short rport; /* remote port */
477 u_short pport_cnt; /* number of public ports */
478 u_short rport_cnt; /* number of remote ports */
479 int proto; /* protocol: tcp/udp */
480 struct alias_link **alink;
481 /* num of entry in spool chain */
482 u_int16_t spool_cnt;
483 /* chain of spool instances */
484 LIST_HEAD(spool_chain, cfg_spool) spool_chain;
485 };
486 #endif
487
488 #ifdef IPFW_INTERNAL
489 /* Nat configuration data struct. */
490 struct cfg_nat {
491 /* chain of nat instances */
492 LIST_ENTRY(cfg_nat) _next;
493 int id; /* nat id */
494 struct in_addr ip; /* nat ip address */
495 char if_name[IF_NAMESIZE]; /* interface name */
496 int mode; /* aliasing mode */
497 struct libalias *lib; /* libalias instance */
498 /* number of entry in spool chain */
499 int redir_cnt;
500 /* chain of redir instances */
501 LIST_HEAD(redir_chain, cfg_redir) redir_chain;
502 };
503 #endif
504
505 #define SOF_NAT sizeof(struct cfg_nat)
506 #define SOF_REDIR sizeof(struct cfg_redir)
507 #define SOF_SPOOL sizeof(struct cfg_spool)
508
509 #endif /* ifndef _KERNEL */
510
511
512 struct nat44_cfg_spool {
513 struct in_addr addr;
514 uint16_t port;
515 uint16_t spare;
516 };
517 #define NAT44_REDIR_ADDR 0x01
518 #define NAT44_REDIR_PORT 0x02
519 #define NAT44_REDIR_PROTO 0x04
520
521 /* Nat redirect configuration. */
522 struct nat44_cfg_redir {
523 struct in_addr laddr; /* local ip address */
524 struct in_addr paddr; /* public ip address */
525 struct in_addr raddr; /* remote ip address */
526 uint16_t lport; /* local port */
527 uint16_t pport; /* public port */
528 uint16_t rport; /* remote port */
529 uint16_t pport_cnt; /* number of public ports */
530 uint16_t rport_cnt; /* number of remote ports */
531 uint16_t mode; /* type of redirect mode */
532 uint16_t spool_cnt; /* num of entry in spool chain */
533 uint16_t spare;
534 uint32_t proto; /* protocol: tcp/udp */
535 };
536
537 /* Nat configuration data struct. */
538 struct nat44_cfg_nat {
539 char name[64]; /* nat name */
540 char if_name[64]; /* interface name */
541 uint32_t size; /* structure size incl. redirs */
542 struct in_addr ip; /* nat IPv4 address */
543 uint32_t mode; /* aliasing mode */
544 uint32_t redir_cnt; /* number of entry in spool chain */
545 };
546
547 /* Nat command. */
548 typedef struct _ipfw_insn_nat {
549 ipfw_insn o;
550 struct cfg_nat *nat;
551 } ipfw_insn_nat;
552
553 /* Apply ipv6 mask on ipv6 addr */
554 #define APPLY_MASK(addr,mask) \
555 (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \
556 (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \
557 (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \
558 (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3];
559
560 /* Structure for ipv6 */
561 typedef struct _ipfw_insn_ip6 {
562 ipfw_insn o;
563 struct in6_addr addr6;
564 struct in6_addr mask6;
565 } ipfw_insn_ip6;
566
567 /* Used to support icmp6 types */
568 typedef struct _ipfw_insn_icmp6 {
569 ipfw_insn o;
570 uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h
571 * define ICMP6_MAXTYPE
572 * as follows: n = ICMP6_MAXTYPE/32 + 1
573 * Actually is 203
574 */
575 } ipfw_insn_icmp6;
576
577 /*
578 * Here we have the structure representing an ipfw rule.
579 *
580 * Layout:
581 * struct ip_fw_rule
582 * [ counter block, size = rule->cntr_len ]
583 * [ one or more instructions, size = rule->cmd_len * 4 ]
584 *
585 * It starts with a general area (with link fields).
586 * Counter block may be next (if rule->cntr_len > 0),
587 * followed by an array of one or more instructions, which the code
588 * accesses as an array of 32-bit values. rule->cmd_len represents
589 * the total instructions legth in u32 worrd, while act_ofs represents
590 * rule action offset in u32 words.
591 *
592 * When assembling instruction, remember the following:
593 *
594 * + if a rule has a "keep-state" (or "limit") option, then the
595 * first instruction (at r->cmd) MUST BE an O_PROBE_STATE
596 * + if a rule has a "log" option, then the first action
597 * (at ACTION_PTR(r)) MUST be O_LOG
598 * + if a rule has an "altq" option, it comes after "log"
599 * + if a rule has an O_TAG option, it comes after "log" and "altq"
600 *
601 *
602 * All structures (excluding instructions) are u64-aligned.
603 * Please keep this.
604 */
605
606 struct ip_fw_rule {
607 uint16_t act_ofs; /* offset of action in 32-bit units */
608 uint16_t cmd_len; /* # of 32-bit words in cmd */
609 uint16_t spare;
610 uint8_t set; /* rule set (0..31) */
611 uint8_t flags; /* rule flags */
612 uint32_t rulenum; /* rule number */
613 uint32_t id; /* rule id */
614
615 ipfw_insn cmd[1]; /* storage for commands */
616 };
617 #define IPFW_RULE_NOOPT 0x01 /* Has no options in body */
618
619 /* Unaligned version */
620
621 /* Base ipfw rule counter block. */
622 struct ip_fw_bcounter {
623 uint16_t size; /* Size of counter block, bytes */
624 uint8_t flags; /* flags for given block */
625 uint8_t spare;
626 uint32_t timestamp; /* tv_sec of last match */
627 uint64_t pcnt; /* Packet counter */
628 uint64_t bcnt; /* Byte counter */
629 };
630
631
632 #ifndef _KERNEL
633 /*
634 * Legacy rule format
635 */
636 struct ip_fw {
637 struct ip_fw *x_next; /* linked list of rules */
638 struct ip_fw *next_rule; /* ptr to next [skipto] rule */
639 /* 'next_rule' is used to pass up 'set_disable' status */
640
641 uint16_t act_ofs; /* offset of action in 32-bit units */
642 uint16_t cmd_len; /* # of 32-bit words in cmd */
643 uint16_t rulenum; /* rule number */
644 uint8_t set; /* rule set (0..31) */
645 uint8_t _pad; /* padding */
646 uint32_t id; /* rule id */
647
648 /* These fields are present in all rules. */
649 uint64_t pcnt; /* Packet counter */
650 uint64_t bcnt; /* Byte counter */
651 uint32_t timestamp; /* tv_sec of last match */
652
653 ipfw_insn cmd[1]; /* storage for commands */
654 };
655 #endif
656
657 #define ACTION_PTR(rule) \
658 (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) )
659
660 #define RULESIZE(rule) (sizeof(*(rule)) + (rule)->cmd_len * 4 - 4)
661
662
663 #if 1 // should be moved to in.h
664 /*
665 * This structure is used as a flow mask and a flow id for various
666 * parts of the code.
667 * addr_type is used in userland and kernel to mark the address type.
668 * fib is used in the kernel to record the fib in use.
669 * _flags is used in the kernel to store tcp flags for dynamic rules.
670 */
671 struct ipfw_flow_id {
672 uint32_t dst_ip;
673 uint32_t src_ip;
674 uint16_t dst_port;
675 uint16_t src_port;
676 uint8_t fib; /* XXX: must be uint16_t */
677 uint8_t proto;
678 uint8_t _flags; /* protocol-specific flags */
679 uint8_t addr_type; /* 4=ip4, 6=ip6, 1=ether ? */
680 struct in6_addr dst_ip6;
681 struct in6_addr src_ip6;
682 uint32_t flow_id6;
683 uint32_t extra; /* queue/pipe or frag_id */
684 };
685 #endif
686
687 #define IS_IP4_FLOW_ID(id) ((id)->addr_type == 4)
688 #define IS_IP6_FLOW_ID(id) ((id)->addr_type == 6)
689
690 /*
691 * Dynamic ipfw rule.
692 */
693 typedef struct _ipfw_dyn_rule ipfw_dyn_rule;
694
695 struct _ipfw_dyn_rule {
696 ipfw_dyn_rule *next; /* linked list of rules. */
697 struct ip_fw *rule; /* pointer to rule */
698 /* 'rule' is used to pass up the rule number (from the parent) */
699
700 ipfw_dyn_rule *parent; /* pointer to parent rule */
701 u_int64_t pcnt; /* packet match counter */
702 u_int64_t bcnt; /* byte match counter */
703 struct ipfw_flow_id id; /* (masked) flow id */
704 u_int32_t expire; /* expire time */
705 u_int32_t bucket; /* which bucket in hash table */
706 u_int32_t state; /* state of this rule (typically a
707 * combination of TCP flags)
708 */
709 u_int32_t ack_fwd; /* most recent ACKs in forward */
710 u_int32_t ack_rev; /* and reverse directions (used */
711 /* to generate keepalives) */
712 u_int16_t dyn_type; /* rule type */
713 u_int16_t count; /* refcount */
714 u_int16_t kidx; /* index of named object */
715 } __packed __aligned(8);
716
717 /*
718 * Definitions for IP option names.
719 */
720 #define IP_FW_IPOPT_LSRR 0x01
721 #define IP_FW_IPOPT_SSRR 0x02
722 #define IP_FW_IPOPT_RR 0x04
723 #define IP_FW_IPOPT_TS 0x08
724
725 /*
726 * Definitions for TCP option names.
727 */
728 #define IP_FW_TCPOPT_MSS 0x01
729 #define IP_FW_TCPOPT_WINDOW 0x02
730 #define IP_FW_TCPOPT_SACK 0x04
731 #define IP_FW_TCPOPT_TS 0x08
732 #define IP_FW_TCPOPT_CC 0x10
733
734 #define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */
735 #define ICMP6_UNREACH_RST 0x100 /* fake ICMPv6 code (send a TCP RST) */
736 #define ICMP_REJECT_ABORT 0x101 /* fake ICMP code (send an SCTP ABORT) */
737 #define ICMP6_UNREACH_ABORT 0x101 /* fake ICMPv6 code (send an SCTP ABORT) */
738
739 /*
740 * These are used for lookup tables.
741 */
742
743 #define IPFW_TABLE_ADDR 1 /* Table for holding IPv4/IPv6 prefixes */
744 #define IPFW_TABLE_INTERFACE 2 /* Table for holding interface names */
745 #define IPFW_TABLE_NUMBER 3 /* Table for holding ports/uid/gid/etc */
746 #define IPFW_TABLE_FLOW 4 /* Table for holding flow data */
747 #define IPFW_TABLE_MAXTYPE 4 /* Maximum valid number */
748
749 #define IPFW_TABLE_CIDR IPFW_TABLE_ADDR /* compat */
750
751 /* Value types */
752 #define IPFW_VTYPE_LEGACY 0xFFFFFFFF /* All data is filled in */
753 #define IPFW_VTYPE_SKIPTO 0x00000001 /* skipto/call/callreturn */
754 #define IPFW_VTYPE_PIPE 0x00000002 /* pipe/queue */
755 #define IPFW_VTYPE_FIB 0x00000004 /* setfib */
756 #define IPFW_VTYPE_NAT 0x00000008 /* nat */
757 #define IPFW_VTYPE_DSCP 0x00000010 /* dscp */
758 #define IPFW_VTYPE_TAG 0x00000020 /* tag/untag */
759 #define IPFW_VTYPE_DIVERT 0x00000040 /* divert/tee */
760 #define IPFW_VTYPE_NETGRAPH 0x00000080 /* netgraph/ngtee */
761 #define IPFW_VTYPE_LIMIT 0x00000100 /* limit */
762 #define IPFW_VTYPE_NH4 0x00000200 /* IPv4 nexthop */
763 #define IPFW_VTYPE_NH6 0x00000400 /* IPv6 nexthop */
764
765 typedef struct _ipfw_table_entry {
766 in_addr_t addr; /* network address */
767 u_int32_t value; /* value */
768 u_int16_t tbl; /* table number */
769 u_int8_t masklen; /* mask length */
770 } ipfw_table_entry;
771
772 typedef struct _ipfw_table_xentry {
773 uint16_t len; /* Total entry length */
774 uint8_t type; /* entry type */
775 uint8_t masklen; /* mask length */
776 uint16_t tbl; /* table number */
777 uint16_t flags; /* record flags */
778 uint32_t value; /* value */
779 union {
780 /* Longest field needs to be aligned by 4-byte boundary */
781 struct in6_addr addr6; /* IPv6 address */
782 char iface[IF_NAMESIZE]; /* interface name */
783 } k;
784 } ipfw_table_xentry;
785 #define IPFW_TCF_INET 0x01 /* CIDR flags: IPv4 record */
786
787 typedef struct _ipfw_table {
788 u_int32_t size; /* size of entries in bytes */
789 u_int32_t cnt; /* # of entries */
790 u_int16_t tbl; /* table number */
791 ipfw_table_entry ent[0]; /* entries */
792 } ipfw_table;
793
794 typedef struct _ipfw_xtable {
795 ip_fw3_opheader opheader; /* IP_FW3 opcode */
796 uint32_t size; /* size of entries in bytes */
797 uint32_t cnt; /* # of entries */
798 uint16_t tbl; /* table number */
799 uint8_t type; /* table type */
800 ipfw_table_xentry xent[0]; /* entries */
801 } ipfw_xtable;
802
803 typedef struct _ipfw_obj_tlv {
804 uint16_t type; /* TLV type */
805 uint16_t flags; /* TLV-specific flags */
806 uint32_t length; /* Total length, aligned to u64 */
807 } ipfw_obj_tlv;
808 #define IPFW_TLV_TBL_NAME 1
809 #define IPFW_TLV_TBLNAME_LIST 2
810 #define IPFW_TLV_RULE_LIST 3
811 #define IPFW_TLV_DYNSTATE_LIST 4
812 #define IPFW_TLV_TBL_ENT 5
813 #define IPFW_TLV_DYN_ENT 6
814 #define IPFW_TLV_RULE_ENT 7
815 #define IPFW_TLV_TBLENT_LIST 8
816 #define IPFW_TLV_RANGE 9
817 #define IPFW_TLV_EACTION 10
818 #define IPFW_TLV_COUNTERS 11
819 #define IPFW_TLV_OBJDATA 12
820 #define IPFW_TLV_STATE_NAME 14
821
822 #define IPFW_TLV_EACTION_BASE 1000
823 #define IPFW_TLV_EACTION_NAME(arg) (IPFW_TLV_EACTION_BASE + (arg))
824
825 typedef struct _ipfw_obj_data {
826 ipfw_obj_tlv head;
827 void *data[0];
828 } ipfw_obj_data;
829
830 /* Object name TLV */
831 typedef struct _ipfw_obj_ntlv {
832 ipfw_obj_tlv head; /* TLV header */
833 uint16_t idx; /* Name index */
834 uint8_t set; /* set, if applicable */
835 uint8_t type; /* object type, if applicable */
836 uint32_t spare; /* unused */
837 char name[64]; /* Null-terminated name */
838 } ipfw_obj_ntlv;
839
840 /* IPv4/IPv6 L4 flow description */
841 struct tflow_entry {
842 uint8_t af;
843 uint8_t proto;
844 uint16_t spare;
845 uint16_t sport;
846 uint16_t dport;
847 union {
848 struct {
849 struct in_addr sip;
850 struct in_addr dip;
851 } a4;
852 struct {
853 struct in6_addr sip6;
854 struct in6_addr dip6;
855 } a6;
856 } a;
857 };
858
859 typedef struct _ipfw_table_value {
860 uint32_t tag; /* O_TAG/O_TAGGED */
861 uint32_t pipe; /* O_PIPE/O_QUEUE */
862 uint16_t divert; /* O_DIVERT/O_TEE */
863 uint16_t skipto; /* skipto, CALLRET */
864 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
865 uint32_t fib; /* O_SETFIB */
866 uint32_t nat; /* O_NAT */
867 uint32_t nh4;
868 uint8_t dscp;
869 uint8_t spare0;
870 uint16_t spare1;
871 struct in6_addr nh6;
872 uint32_t limit; /* O_LIMIT */
873 uint32_t zoneid; /* scope zone id for nh6 */
874 uint64_t reserved;
875 } ipfw_table_value;
876
877 /* Table entry TLV */
878 typedef struct _ipfw_obj_tentry {
879 ipfw_obj_tlv head; /* TLV header */
880 uint8_t subtype; /* subtype (IPv4,IPv6) */
881 uint8_t masklen; /* mask length */
882 uint8_t result; /* request result */
883 uint8_t spare0;
884 uint16_t idx; /* Table name index */
885 uint16_t spare1;
886 union {
887 /* Longest field needs to be aligned by 8-byte boundary */
888 struct in_addr addr; /* IPv4 address */
889 uint32_t key; /* uid/gid/port */
890 struct in6_addr addr6; /* IPv6 address */
891 char iface[IF_NAMESIZE]; /* interface name */
892 struct tflow_entry flow;
893 } k;
894 union {
895 ipfw_table_value value; /* value data */
896 uint32_t kidx; /* value kernel index */
897 } v;
898 } ipfw_obj_tentry;
899 #define IPFW_TF_UPDATE 0x01 /* Update record if exists */
900 /* Container TLV */
901 #define IPFW_CTF_ATOMIC 0x01 /* Perform atomic operation */
902 /* Operation results */
903 #define IPFW_TR_IGNORED 0 /* Entry was ignored (rollback) */
904 #define IPFW_TR_ADDED 1 /* Entry was successfully added */
905 #define IPFW_TR_UPDATED 2 /* Entry was successfully updated*/
906 #define IPFW_TR_DELETED 3 /* Entry was successfully deleted*/
907 #define IPFW_TR_LIMIT 4 /* Entry was ignored (limit) */
908 #define IPFW_TR_NOTFOUND 5 /* Entry was not found */
909 #define IPFW_TR_EXISTS 6 /* Entry already exists */
910 #define IPFW_TR_ERROR 7 /* Request has failed (unknown) */
911
912 typedef struct _ipfw_obj_dyntlv {
913 ipfw_obj_tlv head;
914 ipfw_dyn_rule state;
915 } ipfw_obj_dyntlv;
916 #define IPFW_DF_LAST 0x01 /* Last state in chain */
917
918 /* Containter TLVs */
919 typedef struct _ipfw_obj_ctlv {
920 ipfw_obj_tlv head; /* TLV header */
921 uint32_t count; /* Number of sub-TLVs */
922 uint16_t objsize; /* Single object size */
923 uint8_t version; /* TLV version */
924 uint8_t flags; /* TLV-specific flags */
925 } ipfw_obj_ctlv;
926
927 /* Range TLV */
928 typedef struct _ipfw_range_tlv {
929 ipfw_obj_tlv head; /* TLV header */
930 uint32_t flags; /* Range flags */
931 uint16_t start_rule; /* Range start */
932 uint16_t end_rule; /* Range end */
933 uint32_t set; /* Range set to match */
934 uint32_t new_set; /* New set to move/swap to */
935 } ipfw_range_tlv;
936 #define IPFW_RCFLAG_RANGE 0x01 /* rule range is set */
937 #define IPFW_RCFLAG_ALL 0x02 /* match ALL rules */
938 #define IPFW_RCFLAG_SET 0x04 /* match rules in given set */
939 /* User-settable flags */
940 #define IPFW_RCFLAG_USER (IPFW_RCFLAG_RANGE | IPFW_RCFLAG_ALL | \
941 IPFW_RCFLAG_SET)
942 /* Internally used flags */
943 #define IPFW_RCFLAG_DEFAULT 0x0100 /* Do not skip defaul rule */
944
945 typedef struct _ipfw_ta_tinfo {
946 uint32_t flags; /* Format flags */
947 uint32_t spare;
948 uint8_t taclass4; /* algorithm class */
949 uint8_t spare4;
950 uint16_t itemsize4; /* item size in runtime */
951 uint32_t size4; /* runtime structure size */
952 uint32_t count4; /* number of items in runtime */
953 uint8_t taclass6; /* algorithm class */
954 uint8_t spare6;
955 uint16_t itemsize6; /* item size in runtime */
956 uint32_t size6; /* runtime structure size */
957 uint32_t count6; /* number of items in runtime */
958 } ipfw_ta_tinfo;
959 #define IPFW_TACLASS_HASH 1 /* algo is based on hash */
960 #define IPFW_TACLASS_ARRAY 2 /* algo is based on array */
961 #define IPFW_TACLASS_RADIX 3 /* algo is based on radix tree */
962
963 #define IPFW_TATFLAGS_DATA 0x0001 /* Has data filled in */
964 #define IPFW_TATFLAGS_AFDATA 0x0002 /* Separate data per AF */
965 #define IPFW_TATFLAGS_AFITEM 0x0004 /* diff. items per AF */
966
967 typedef struct _ipfw_xtable_info {
968 uint8_t type; /* table type (addr,iface,..) */
969 uint8_t tflags; /* type flags */
970 uint16_t mflags; /* modification flags */
971 uint16_t flags; /* generic table flags */
972 uint16_t spare[3];
973 uint32_t vmask; /* bitmask with value types */
974 uint32_t set; /* set table is in */
975 uint32_t kidx; /* kernel index */
976 uint32_t refcnt; /* number of references */
977 uint32_t count; /* Number of records */
978 uint32_t size; /* Total size of records(export)*/
979 uint32_t limit; /* Max number of records */
980 char tablename[64]; /* table name */
981 char algoname[64]; /* algorithm name */
982 ipfw_ta_tinfo ta_info; /* additional algo stats */
983 } ipfw_xtable_info;
984 /* Generic table flags */
985 #define IPFW_TGFLAGS_LOCKED 0x01 /* Tables is locked from changes*/
986 /* Table type-specific flags */
987 #define IPFW_TFFLAG_SRCIP 0x01
988 #define IPFW_TFFLAG_DSTIP 0x02
989 #define IPFW_TFFLAG_SRCPORT 0x04
990 #define IPFW_TFFLAG_DSTPORT 0x08
991 #define IPFW_TFFLAG_PROTO 0x10
992 /* Table modification flags */
993 #define IPFW_TMFLAGS_LIMIT 0x0002 /* Change limit value */
994 #define IPFW_TMFLAGS_LOCK 0x0004 /* Change table lock state */
995
996 typedef struct _ipfw_iface_info {
997 char ifname[64]; /* interface name */
998 uint32_t ifindex; /* interface index */
999 uint32_t flags; /* flags */
1000 uint32_t refcnt; /* number of references */
1001 uint32_t gencnt; /* number of changes */
1002 uint64_t spare;
1003 } ipfw_iface_info;
1004 #define IPFW_IFFLAG_RESOLVED 0x01 /* Interface exists */
1005
1006 typedef struct _ipfw_ta_info {
1007 char algoname[64]; /* algorithm name */
1008 uint32_t type; /* lookup type */
1009 uint32_t flags;
1010 uint32_t refcnt;
1011 uint32_t spare0;
1012 uint64_t spare1;
1013 } ipfw_ta_info;
1014
1015 typedef struct _ipfw_obj_header {
1016 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1017 uint32_t spare;
1018 uint16_t idx; /* object name index */
1019 uint8_t objtype; /* object type */
1020 uint8_t objsubtype; /* object subtype */
1021 ipfw_obj_ntlv ntlv; /* object name tlv */
1022 } ipfw_obj_header;
1023
1024 typedef struct _ipfw_obj_lheader {
1025 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1026 uint32_t set_mask; /* disabled set mask */
1027 uint32_t count; /* Total objects count */
1028 uint32_t size; /* Total size (incl. header) */
1029 uint32_t objsize; /* Size of one object */
1030 } ipfw_obj_lheader;
1031
1032 #define IPFW_CFG_GET_STATIC 0x01
1033 #define IPFW_CFG_GET_STATES 0x02
1034 #define IPFW_CFG_GET_COUNTERS 0x04
1035 typedef struct _ipfw_cfg_lheader {
1036 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1037 uint32_t set_mask; /* enabled set mask */
1038 uint32_t spare;
1039 uint32_t flags; /* Request flags */
1040 uint32_t size; /* neded buffer size */
1041 uint32_t start_rule;
1042 uint32_t end_rule;
1043 } ipfw_cfg_lheader;
1044
1045 typedef struct _ipfw_range_header {
1046 ip_fw3_opheader opheader; /* IP_FW3 opcode */
1047 ipfw_range_tlv range;
1048 } ipfw_range_header;
1049
1050 typedef struct _ipfw_sopt_info {
1051 uint16_t opcode;
1052 uint8_t version;
1053 uint8_t dir;
1054 uint8_t spare;
1055 uint64_t refcnt;
1056 } ipfw_sopt_info;
1057
1058 #endif /* _IPFW2_H */
Cache object: 732339760128a82afdbbb4ee42e0efb1
|