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[netbsd-mini2440.git] / sys / dist / pf / net / pfvar.h
blobc6877f5909e9ba9daa867daec81377922449340e
1 /* $NetBSD: pfvar.h,v 1.16 2008/06/18 09:06:27 yamt Exp $ */
2 /* $OpenBSD: pfvar.h,v 1.254 2007/07/13 09:17:48 markus Exp $ */
3
4 /*
5 * Copyright (c) 2001 Daniel Hartmeier
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * - Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #ifndef _NET_PFVAR_H_
35 #define _NET_PFVAR_H_
36
37 #include <sys/param.h>
38 #include <sys/types.h>
39 #include <sys/queue.h>
40 #include <sys/tree.h>
41 #include <sys/rwlock.h>
42
43 #include <net/radix.h>
44 #ifndef __NetBSD__
45 #include <net/route.h>
46 #include <netinet/ip_ipsp.h>
47 #else
48 /* files above include netinet/in.h so include it too for compatibility */
49 #include <netinet/in.h>
50 #endif /* __NetBSD__ */
51 #include <netinet/tcp_fsm.h>
52
53 #if defined(__NetBSD__) && defined(_KERNEL)
54 #include <net/if_compat.h>
55 #include <net/pf_mtag.h>
56 #endif /* __NetBSD__ && _KERNEL */
57
58 #ifdef __NetBSD__
59 union sockaddr_union {
60 struct sockaddr sa;
61 struct sockaddr_in sin;
62 struct sockaddr_in6 sin6;
63 };
64 #endif /* __NetBSD__ */
65
66 struct ip;
67 struct ip6_hdr;
68
69 #define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0)
70 #define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1)
71
72 #define PF_MD5_DIGEST_LENGTH 16
73 #ifdef MD5_DIGEST_LENGTH
74 #if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH
75 #error
76 #endif
77 #endif
78
79 enum { PF_INOUT, PF_IN, PF_OUT };
80 enum { PF_LAN_EXT, PF_EXT_GWY, PF_ID };
81 enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT,
82 PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP };
83 enum { PF_RULESET_SCRUB, PF_RULESET_FILTER, PF_RULESET_NAT,
84 PF_RULESET_BINAT, PF_RULESET_RDR, PF_RULESET_MAX };
85 enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT,
86 PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG };
87 enum { PF_DEBUG_NONE, PF_DEBUG_URGENT, PF_DEBUG_MISC, PF_DEBUG_NOISY };
88 enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL,
89 PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER,
90 PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET };
91 enum { PF_GET_NONE, PF_GET_CLR_CNTR };
92
93 /*
94 * Note about PFTM_*: real indices into pf_rule.timeout[] come before
95 * PFTM_MAX, special cases afterwards. See pf_state_expires().
96 */
97 enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED,
98 PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED,
99 PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE,
100 PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY,
101 PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE,
102 PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL,
103 PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE,
104 PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED,
105 PFTM_UNTIL_PACKET };
106
107 /* PFTM default values */
108 #define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */
109 #define PFTM_TCP_OPENING_VAL 30 /* No response yet */
110 #define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */
111 #define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */
112 #define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */
113 #define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */
114 #define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */
115 #define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */
116 #define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */
117 #define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */
118 #define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */
119 #define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */
120 #define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */
121 #define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */
122 #define PFTM_FRAG_VAL 30 /* Fragment expire */
123 #define PFTM_INTERVAL_VAL 10 /* Expire interval */
124 #define PFTM_SRC_NODE_VAL 0 /* Source tracking */
125 #define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */
126
127 enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO };
128 enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS,
129 PF_LIMIT_TABLES, PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX };
130 #define PF_POOL_IDMASK 0x0f
131 enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM,
132 PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN };
133 enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL,
134 PF_ADDR_TABLE, PF_ADDR_RTLABEL, PF_ADDR_URPFFAILED };
135 #define PF_POOL_TYPEMASK 0x0f
136 #define PF_POOL_STICKYADDR 0x20
137 #define PF_WSCALE_FLAG 0x80
138 #define PF_WSCALE_MASK 0x0f
139
140 #define PF_LOG 0x01
141 #define PF_LOG_ALL 0x02
142 #define PF_LOG_SOCKET_LOOKUP 0x04
143
144 struct pf_addr {
145 union {
146 struct in_addr v4;
147 struct in6_addr v6;
148 u_int8_t addr8[16];
149 u_int16_t addr16[8];
150 u_int32_t addr32[4];
151 } pfa; /* 128-bit address */
152 #define v4 pfa.v4
153 #define v6 pfa.v6
154 #define addr8 pfa.addr8
155 #define addr16 pfa.addr16
156 #define addr32 pfa.addr32
157 };
158
159 #define PF_TABLE_NAME_SIZE 32
160
161 #define PFI_AFLAG_NETWORK 0x01
162 #define PFI_AFLAG_BROADCAST 0x02
163 #define PFI_AFLAG_PEER 0x04
164 #define PFI_AFLAG_MODEMASK 0x07
165 #define PFI_AFLAG_NOALIAS 0x08
166
167 #ifndef RTLABEL_LEN
168 #define RTLABEL_LEN 32
169 #endif
170
171 struct pf_addr_wrap {
172 union {
173 struct {
174 struct pf_addr addr;
175 struct pf_addr mask;
176 } a;
177 char ifname[IFNAMSIZ];
178 char tblname[PF_TABLE_NAME_SIZE];
179 char rtlabelname[RTLABEL_LEN];
180 u_int32_t rtlabel;
181 } v;
182 union {
183 struct pfi_dynaddr *dyn;
184 struct pfr_ktable *tbl;
185 int dyncnt;
186 int tblcnt;
187 } p;
188 u_int8_t type; /* PF_ADDR_* */
189 u_int8_t iflags; /* PFI_AFLAG_* */
190 };
191
192 #ifdef _KERNEL
193
194 struct pfi_dynaddr {
195 TAILQ_ENTRY(pfi_dynaddr) entry;
196 struct pf_addr pfid_addr4;
197 struct pf_addr pfid_mask4;
198 struct pf_addr pfid_addr6;
199 struct pf_addr pfid_mask6;
200 struct pfr_ktable *pfid_kt;
201 struct pfi_kif *pfid_kif;
202 void *pfid_hook_cookie;
203 int pfid_net; /* mask or 128 */
204 int pfid_acnt4; /* address count IPv4 */
205 int pfid_acnt6; /* address count IPv6 */
206 sa_family_t pfid_af; /* rule af */
207 u_int8_t pfid_iflags; /* PFI_AFLAG_* */
208 };
209
210 /*
211 * Address manipulation macros
212 */
213
214 #ifdef INET
215 #ifndef INET6
216 #define PF_INET_ONLY
217 #endif /* ! INET6 */
218 #endif /* INET */
219
220 #ifdef INET6
221 #ifndef INET
222 #define PF_INET6_ONLY
223 #endif /* ! INET */
224 #endif /* INET6 */
225
226 #ifdef INET
227 #ifdef INET6
228 #define PF_INET_INET6
229 #endif /* INET6 */
230 #endif /* INET */
231
232 #else
233
234 #define PF_INET_INET6
235
236 #endif /* _KERNEL */
237
238 /* Both IPv4 and IPv6 */
239 #ifdef PF_INET_INET6
240
241 #define PF_AEQ(a, b, c) \
242 ((c == AF_INET && (a)->addr32[0] == (b)->addr32[0]) || \
243 ((a)->addr32[3] == (b)->addr32[3] && \
244 (a)->addr32[2] == (b)->addr32[2] && \
245 (a)->addr32[1] == (b)->addr32[1] && \
246 (a)->addr32[0] == (b)->addr32[0])) \
247
248 #define PF_ANEQ(a, b, c) \
249 ((c == AF_INET && (a)->addr32[0] != (b)->addr32[0]) || \
250 ((a)->addr32[3] != (b)->addr32[3] || \
251 (a)->addr32[2] != (b)->addr32[2] || \
252 (a)->addr32[1] != (b)->addr32[1] || \
253 (a)->addr32[0] != (b)->addr32[0])) \
254
255 #define PF_AZERO(a, c) \
256 ((c == AF_INET && !(a)->addr32[0]) || \
257 (!(a)->addr32[0] && !(a)->addr32[1] && \
258 !(a)->addr32[2] && !(a)->addr32[3] )) \
259
260 #define PF_MATCHA(n, a, m, b, f) \
261 pf_match_addr(n, a, m, b, f)
262
263 #define PF_ACPY(a, b, f) \
264 pf_addrcpy(a, b, f)
265
266 #define PF_AINC(a, f) \
267 pf_addr_inc(a, f)
268
269 #define PF_POOLMASK(a, b, c, d, f) \
270 pf_poolmask(a, b, c, d, f)
271
272 #else
273
274 /* Just IPv6 */
275
276 #ifdef PF_INET6_ONLY
277
278 #define PF_AEQ(a, b, c) \
279 ((a)->addr32[3] == (b)->addr32[3] && \
280 (a)->addr32[2] == (b)->addr32[2] && \
281 (a)->addr32[1] == (b)->addr32[1] && \
282 (a)->addr32[0] == (b)->addr32[0]) \
283
284 #define PF_ANEQ(a, b, c) \
285 ((a)->addr32[3] != (b)->addr32[3] || \
286 (a)->addr32[2] != (b)->addr32[2] || \
287 (a)->addr32[1] != (b)->addr32[1] || \
288 (a)->addr32[0] != (b)->addr32[0]) \
289
290 #define PF_AZERO(a, c) \
291 (!(a)->addr32[0] && \
292 !(a)->addr32[1] && \
293 !(a)->addr32[2] && \
294 !(a)->addr32[3] ) \
295
296 #define PF_MATCHA(n, a, m, b, f) \
297 pf_match_addr(n, a, m, b, f)
298
299 #define PF_ACPY(a, b, f) \
300 pf_addrcpy(a, b, f)
301
302 #define PF_AINC(a, f) \
303 pf_addr_inc(a, f)
304
305 #define PF_POOLMASK(a, b, c, d, f) \
306 pf_poolmask(a, b, c, d, f)
307
308 #else
309
310 /* Just IPv4 */
311 #ifdef PF_INET_ONLY
312
313 #define PF_AEQ(a, b, c) \
314 ((a)->addr32[0] == (b)->addr32[0])
315
316 #define PF_ANEQ(a, b, c) \
317 ((a)->addr32[0] != (b)->addr32[0])
318
319 #define PF_AZERO(a, c) \
320 (!(a)->addr32[0])
321
322 #define PF_MATCHA(n, a, m, b, f) \
323 pf_match_addr(n, a, m, b, f)
324
325 #define PF_ACPY(a, b, f) \
326 (a)->v4.s_addr = (b)->v4.s_addr
327
328 #define PF_AINC(a, f) \
329 do { \
330 (a)->addr32[0] = htonl(ntohl((a)->addr32[0]) + 1); \
331 } while (0)
332
333 #define PF_POOLMASK(a, b, c, d, f) \
334 do { \
335 (a)->addr32[0] = ((b)->addr32[0] & (c)->addr32[0]) | \
336 (((c)->addr32[0] ^ 0xffffffff ) & (d)->addr32[0]); \
337 } while (0)
338
339 #endif /* PF_INET_ONLY */
340 #endif /* PF_INET6_ONLY */
341 #endif /* PF_INET_INET6 */
342
343 #define PF_MISMATCHAW(aw, x, af, neg, ifp) \
344 ( \
345 (((aw)->type == PF_ADDR_NOROUTE && \
346 pf_routable((x), (af), NULL)) || \
347 (((aw)->type == PF_ADDR_URPFFAILED && (ifp) != NULL && \
348 pf_routable((x), (af), (ifp))) || \
349 ((aw)->type == PF_ADDR_RTLABEL && \
350 !pf_rtlabel_match((x), (af), (aw))) || \
351 ((aw)->type == PF_ADDR_TABLE && \
352 !pfr_match_addr((aw)->p.tbl, (x), (af))) || \
353 ((aw)->type == PF_ADDR_DYNIFTL && \
354 !pfi_match_addr((aw)->p.dyn, (x), (af))) || \
355 ((aw)->type == PF_ADDR_ADDRMASK && \
356 !PF_AZERO(&(aw)->v.a.mask, (af)) && \
357 !PF_MATCHA(0, &(aw)->v.a.addr, \
358 &(aw)->v.a.mask, (x), (af))))) != \
359 (neg) \
360 )
361
362
363 struct pf_rule_uid {
364 uid_t uid[2];
365 u_int8_t op;
366 };
367
368 struct pf_rule_gid {
369 uid_t gid[2];
370 u_int8_t op;
371 };
372
373 struct pf_rule_addr {
374 struct pf_addr_wrap addr;
375 u_int16_t port[2];
376 u_int8_t neg;
377 u_int8_t port_op;
378 };
379
380 struct pf_pooladdr {
381 struct pf_addr_wrap addr;
382 TAILQ_ENTRY(pf_pooladdr) entries;
383 char ifname[IFNAMSIZ];
384 struct pfi_kif *kif;
385 };
386
387 TAILQ_HEAD(pf_palist, pf_pooladdr);
388
389 struct pf_poolhashkey {
390 union {
391 u_int8_t key8[16];
392 u_int16_t key16[8];
393 u_int32_t key32[4];
394 } pfk; /* 128-bit hash key */
395 #define key8 pfk.key8
396 #define key16 pfk.key16
397 #define key32 pfk.key32
398 };
399
400 struct pf_pool {
401 struct pf_palist list;
402 struct pf_pooladdr *cur;
403 struct pf_poolhashkey key;
404 struct pf_addr counter;
405 int tblidx;
406 u_int16_t proxy_port[2];
407 u_int8_t port_op;
408 u_int8_t opts;
409 };
410
411
412 /* A packed Operating System description for fingerprinting */
413 typedef u_int32_t pf_osfp_t;
414 #define PF_OSFP_ANY ((pf_osfp_t)0)
415 #define PF_OSFP_UNKNOWN ((pf_osfp_t)-1)
416 #define PF_OSFP_NOMATCH ((pf_osfp_t)-2)
417
418 struct pf_osfp_entry {
419 SLIST_ENTRY(pf_osfp_entry) fp_entry;
420 pf_osfp_t fp_os;
421 int fp_enflags;
422 #define PF_OSFP_EXPANDED 0x001 /* expanded entry */
423 #define PF_OSFP_GENERIC 0x002 /* generic signature */
424 #define PF_OSFP_NODETAIL 0x004 /* no p0f details */
425 #define PF_OSFP_LEN 32
426 char fp_class_nm[PF_OSFP_LEN];
427 char fp_version_nm[PF_OSFP_LEN];
428 char fp_subtype_nm[PF_OSFP_LEN];
429 };
430 #define PF_OSFP_ENTRY_EQ(a, b) \
431 ((a)->fp_os == (b)->fp_os && \
432 memcmp((a)->fp_class_nm, (b)->fp_class_nm, PF_OSFP_LEN) == 0 && \
433 memcmp((a)->fp_version_nm, (b)->fp_version_nm, PF_OSFP_LEN) == 0 && \
434 memcmp((a)->fp_subtype_nm, (b)->fp_subtype_nm, PF_OSFP_LEN) == 0)
435
436 /* handle pf_osfp_t packing */
437 #define _FP_RESERVED_BIT 1 /* For the special negative #defines */
438 #define _FP_UNUSED_BITS 1
439 #define _FP_CLASS_BITS 10 /* OS Class (Windows, Linux) */
440 #define _FP_VERSION_BITS 10 /* OS version (95, 98, NT, 2.4.54, 3.2) */
441 #define _FP_SUBTYPE_BITS 10 /* patch level (NT SP4, SP3, ECN patch) */
442 #define PF_OSFP_UNPACK(osfp, class, version, subtype) do { \
443 (class) = ((osfp) >> (_FP_VERSION_BITS+_FP_SUBTYPE_BITS)) & \
444 ((1 << _FP_CLASS_BITS) - 1); \
445 (version) = ((osfp) >> _FP_SUBTYPE_BITS) & \
446 ((1 << _FP_VERSION_BITS) - 1);\
447 (subtype) = (osfp) & ((1 << _FP_SUBTYPE_BITS) - 1); \
448 } while(0)
449 #define PF_OSFP_PACK(osfp, class, version, subtype) do { \
450 (osfp) = ((class) & ((1 << _FP_CLASS_BITS) - 1)) << (_FP_VERSION_BITS \
451 + _FP_SUBTYPE_BITS); \
452 (osfp) |= ((version) & ((1 << _FP_VERSION_BITS) - 1)) << \
453 _FP_SUBTYPE_BITS; \
454 (osfp) |= (subtype) & ((1 << _FP_SUBTYPE_BITS) - 1); \
455 } while(0)
456
457 /* the fingerprint of an OSes TCP SYN packet */
458 typedef u_int64_t pf_tcpopts_t;
459 struct pf_os_fingerprint {
460 SLIST_HEAD(pf_osfp_enlist, pf_osfp_entry) fp_oses; /* list of matches */
461 pf_tcpopts_t fp_tcpopts; /* packed TCP options */
462 u_int16_t fp_wsize; /* TCP window size */
463 u_int16_t fp_psize; /* ip->ip_len */
464 u_int16_t fp_mss; /* TCP MSS */
465 u_int16_t fp_flags;
466 #define PF_OSFP_WSIZE_MOD 0x0001 /* Window modulus */
467 #define PF_OSFP_WSIZE_DC 0x0002 /* Window don't care */
468 #define PF_OSFP_WSIZE_MSS 0x0004 /* Window multiple of MSS */
469 #define PF_OSFP_WSIZE_MTU 0x0008 /* Window multiple of MTU */
470 #define PF_OSFP_PSIZE_MOD 0x0010 /* packet size modulus */
471 #define PF_OSFP_PSIZE_DC 0x0020 /* packet size don't care */
472 #define PF_OSFP_WSCALE 0x0040 /* TCP window scaling */
473 #define PF_OSFP_WSCALE_MOD 0x0080 /* TCP window scale modulus */
474 #define PF_OSFP_WSCALE_DC 0x0100 /* TCP window scale dont-care */
475 #define PF_OSFP_MSS 0x0200 /* TCP MSS */
476 #define PF_OSFP_MSS_MOD 0x0400 /* TCP MSS modulus */
477 #define PF_OSFP_MSS_DC 0x0800 /* TCP MSS dont-care */
478 #define PF_OSFP_DF 0x1000 /* IPv4 don't fragment bit */
479 #define PF_OSFP_TS0 0x2000 /* Zero timestamp */
480 #define PF_OSFP_INET6 0x4000 /* IPv6 */
481 u_int8_t fp_optcnt; /* TCP option count */
482 u_int8_t fp_wscale; /* TCP window scaling */
483 u_int8_t fp_ttl; /* IPv4 TTL */
484 #define PF_OSFP_MAXTTL_OFFSET 40
485 /* TCP options packing */
486 #define PF_OSFP_TCPOPT_NOP 0x0 /* TCP NOP option */
487 #define PF_OSFP_TCPOPT_WSCALE 0x1 /* TCP window scaling option */
488 #define PF_OSFP_TCPOPT_MSS 0x2 /* TCP max segment size opt */
489 #define PF_OSFP_TCPOPT_SACK 0x3 /* TCP SACK OK option */
490 #define PF_OSFP_TCPOPT_TS 0x4 /* TCP timestamp option */
491 #define PF_OSFP_TCPOPT_BITS 3 /* bits used by each option */
492 #define PF_OSFP_MAX_OPTS \
493 (sizeof(((struct pf_os_fingerprint *)0)->fp_tcpopts) * 8) \
494 / PF_OSFP_TCPOPT_BITS
495
496 SLIST_ENTRY(pf_os_fingerprint) fp_next;
497 };
498
499 struct pf_osfp_ioctl {
500 struct pf_osfp_entry fp_os;
501 pf_tcpopts_t fp_tcpopts; /* packed TCP options */
502 u_int16_t fp_wsize; /* TCP window size */
503 u_int16_t fp_psize; /* ip->ip_len */
504 u_int16_t fp_mss; /* TCP MSS */
505 u_int16_t fp_flags;
506 u_int8_t fp_optcnt; /* TCP option count */
507 u_int8_t fp_wscale; /* TCP window scaling */
508 u_int8_t fp_ttl; /* IPv4 TTL */
509
510 int fp_getnum; /* DIOCOSFPGET number */
511 };
512
513
514 union pf_rule_ptr {
515 struct pf_rule *ptr;
516 u_int32_t nr;
517 };
518
519 #define PF_ANCHOR_NAME_SIZE 64
520
521 struct pf_rule {
522 struct pf_rule_addr src;
523 struct pf_rule_addr dst;
524 #define PF_SKIP_IFP 0
525 #define PF_SKIP_DIR 1
526 #define PF_SKIP_AF 2
527 #define PF_SKIP_PROTO 3
528 #define PF_SKIP_SRC_ADDR 4
529 #define PF_SKIP_SRC_PORT 5
530 #define PF_SKIP_DST_ADDR 6
531 #define PF_SKIP_DST_PORT 7
532 #define PF_SKIP_COUNT 8
533 union pf_rule_ptr skip[PF_SKIP_COUNT];
534 #define PF_RULE_LABEL_SIZE 64
535 char label[PF_RULE_LABEL_SIZE];
536 #define PF_QNAME_SIZE 64
537 char ifname[IFNAMSIZ];
538 char qname[PF_QNAME_SIZE];
539 char pqname[PF_QNAME_SIZE];
540 #define PF_TAG_NAME_SIZE 64
541 char tagname[PF_TAG_NAME_SIZE];
542 char match_tagname[PF_TAG_NAME_SIZE];
543
544 char overload_tblname[PF_TABLE_NAME_SIZE];
545
546 TAILQ_ENTRY(pf_rule) entries;
547 struct pf_pool rpool;
548
549 u_int64_t evaluations;
550 u_int64_t packets[2];
551 u_int64_t bytes[2];
552
553 struct pfi_kif *kif;
554 struct pf_anchor *anchor;
555 struct pfr_ktable *overload_tbl;
556
557 pf_osfp_t os_fingerprint;
558
559 int rtableid;
560 u_int32_t timeout[PFTM_MAX];
561 u_int32_t states;
562 u_int32_t max_states;
563 u_int32_t src_nodes;
564 u_int32_t max_src_nodes;
565 u_int32_t max_src_states;
566 u_int32_t max_src_conn;
567 struct {
568 u_int32_t limit;
569 u_int32_t seconds;
570 } max_src_conn_rate;
571 u_int32_t qid;
572 u_int32_t pqid;
573 u_int32_t rt_listid;
574 u_int32_t nr;
575 u_int32_t prob;
576 uid_t cuid;
577 pid_t cpid;
578
579 u_int16_t return_icmp;
580 u_int16_t return_icmp6;
581 u_int16_t max_mss;
582 u_int16_t tag;
583 u_int16_t match_tag;
584
585 struct pf_rule_uid uid;
586 struct pf_rule_gid gid;
587
588 u_int32_t rule_flag;
589 u_int8_t action;
590 u_int8_t direction;
591 u_int8_t log;
592 u_int8_t logif;
593 u_int8_t quick;
594 u_int8_t ifnot;
595 u_int8_t match_tag_not;
596 u_int8_t natpass;
597
598 #define PF_STATE_NORMAL 0x1
599 #define PF_STATE_MODULATE 0x2
600 #define PF_STATE_SYNPROXY 0x3
601 u_int8_t keep_state;
602 sa_family_t af;
603 u_int8_t proto;
604 u_int8_t type;
605 u_int8_t code;
606 u_int8_t flags;
607 u_int8_t flagset;
608 u_int8_t min_ttl;
609 u_int8_t allow_opts;
610 u_int8_t rt;
611 u_int8_t return_ttl;
612 u_int8_t tos;
613 u_int8_t anchor_relative;
614 u_int8_t anchor_wildcard;
615
616 #define PF_FLUSH 0x01
617 #define PF_FLUSH_GLOBAL 0x02
618 u_int8_t flush;
619 };
620
621 /* rule flags */
622 #define PFRULE_DROP 0x0000
623 #define PFRULE_RETURNRST 0x0001
624 #define PFRULE_FRAGMENT 0x0002
625 #define PFRULE_RETURNICMP 0x0004
626 #define PFRULE_RETURN 0x0008
627 #define PFRULE_NOSYNC 0x0010
628 #define PFRULE_SRCTRACK 0x0020 /* track source states */
629 #define PFRULE_RULESRCTRACK 0x0040 /* per rule */
630
631 /* scrub flags */
632 #define PFRULE_NODF 0x0100
633 #define PFRULE_FRAGCROP 0x0200 /* non-buffering frag cache */
634 #define PFRULE_FRAGDROP 0x0400 /* drop funny fragments */
635 #define PFRULE_RANDOMID 0x0800
636 #define PFRULE_REASSEMBLE_TCP 0x1000
637
638 /* rule flags again */
639 #define PFRULE_IFBOUND 0x00010000 /* if-bound */
640
641 #define PFSTATE_HIWAT 10000 /* default state table size */
642 #define PFSTATE_ADAPT_START 6000 /* default adaptive timeout start */
643 #define PFSTATE_ADAPT_END 12000 /* default adaptive timeout end */
644
645
646 struct pf_threshold {
647 u_int32_t limit;
648 #define PF_THRESHOLD_MULT 1000
649 #define PF_THRESHOLD_MAX 0xffffffff / PF_THRESHOLD_MULT
650 u_int32_t seconds;
651 u_int32_t count;
652 u_int32_t last;
653 };
654
655 struct pf_src_node {
656 RB_ENTRY(pf_src_node) entry;
657 struct pf_addr addr;
658 struct pf_addr raddr;
659 union pf_rule_ptr rule;
660 struct pfi_kif *kif;
661 u_int64_t bytes[2];
662 u_int64_t packets[2];
663 u_int32_t states;
664 u_int32_t conn;
665 struct pf_threshold conn_rate;
666 u_int32_t creation;
667 u_int32_t expire;
668 sa_family_t af;
669 u_int8_t ruletype;
670 };
671
672 #define PFSNODE_HIWAT 10000 /* default source node table size */
673
674 struct pf_state_scrub {
675 struct timeval pfss_last; /* time received last packet */
676 u_int32_t pfss_tsecr; /* last echoed timestamp */
677 u_int32_t pfss_tsval; /* largest timestamp */
678 u_int32_t pfss_tsval0; /* original timestamp */
679 u_int16_t pfss_flags;
680 #define PFSS_TIMESTAMP 0x0001 /* modulate timestamp */
681 #define PFSS_PAWS 0x0010 /* stricter PAWS checks */
682 #define PFSS_PAWS_IDLED 0x0020 /* was idle too long. no PAWS */
683 #define PFSS_DATA_TS 0x0040 /* timestamp on data packets */
684 #define PFSS_DATA_NOTS 0x0080 /* no timestamp on data packets */
685 u_int8_t pfss_ttl; /* stashed TTL */
686 u_int8_t pad;
687 u_int32_t pfss_ts_mod; /* timestamp modulation */
688 };
689
690 struct pf_state_host {
691 struct pf_addr addr;
692 u_int16_t port;
693 u_int16_t pad;
694 };
695
696 struct pf_state_peer {
697 u_int32_t seqlo; /* Max sequence number sent */
698 u_int32_t seqhi; /* Max the other end ACKd + win */
699 u_int32_t seqdiff; /* Sequence number modulator */
700 u_int16_t max_win; /* largest window (pre scaling) */
701 u_int8_t state; /* active state level */
702 u_int8_t wscale; /* window scaling factor */
703 u_int16_t mss; /* Maximum segment size option */
704 u_int8_t tcp_est; /* Did we reach TCPS_ESTABLISHED */
705 struct pf_state_scrub *scrub; /* state is scrubbed */
706 u_int8_t pad[3];
707 };
708
709 TAILQ_HEAD(pf_state_queue, pf_state);
710
711 /* keep synced with struct pf_state_key, used in RB_FIND */
712 struct pf_state_key_cmp {
713 struct pf_state_host lan;
714 struct pf_state_host gwy;
715 struct pf_state_host ext;
716 sa_family_t af;
717 u_int8_t proto;
718 u_int8_t direction;
719 u_int8_t pad;
720 };
721
722 TAILQ_HEAD(pf_statelist, pf_state);
723
724 struct pf_state_key {
725 struct pf_state_host lan;
726 struct pf_state_host gwy;
727 struct pf_state_host ext;
728 sa_family_t af;
729 u_int8_t proto;
730 u_int8_t direction;
731 u_int8_t pad;
732
733 RB_ENTRY(pf_state_key) entry_lan_ext;
734 RB_ENTRY(pf_state_key) entry_ext_gwy;
735 struct pf_statelist states;
736 u_short refcnt; /* same size as if_index */
737 };
738
739
740 /* keep synced with struct pf_state, used in RB_FIND */
741 struct pf_state_cmp {
742 u_int64_t id;
743 u_int32_t creatorid;
744 u_int32_t pad;
745 };
746
747 struct pf_state {
748 u_int64_t id;
749 u_int32_t creatorid;
750 u_int32_t pad;
751
752 TAILQ_ENTRY(pf_state) entry_list;
753 TAILQ_ENTRY(pf_state) next;
754 RB_ENTRY(pf_state) entry_id;
755 struct pf_state_peer src;
756 struct pf_state_peer dst;
757 union pf_rule_ptr rule;
758 union pf_rule_ptr anchor;
759 union pf_rule_ptr nat_rule;
760 struct pf_addr rt_addr;
761 struct pf_state_key *state_key;
762 struct pfi_kif *kif;
763 struct pfi_kif *rt_kif;
764 struct pf_src_node *src_node;
765 struct pf_src_node *nat_src_node;
766 u_int64_t packets[2];
767 u_int64_t bytes[2];
768 u_int32_t creation;
769 u_int32_t expire;
770 u_int32_t pfsync_time;
771 u_int16_t tag;
772 u_int8_t log;
773 u_int8_t allow_opts;
774 u_int8_t timeout;
775 u_int8_t sync_flags;
776 #define PFSTATE_NOSYNC 0x01
777 #define PFSTATE_FROMSYNC 0x02
778 #define PFSTATE_STALE 0x04
779 };
780
781 /*
782 * Unified state structures for pulling states out of the kernel
783 * used by pfsync(4) and the pf(4) ioctl.
784 */
785 struct pfsync_state_scrub {
786 u_int16_t pfss_flags;
787 u_int8_t pfss_ttl; /* stashed TTL */
788 #define PFSYNC_SCRUB_FLAG_VALID 0x01
789 u_int8_t scrub_flag;
790 u_int32_t pfss_ts_mod; /* timestamp modulation */
791 } __packed;
792
793 struct pfsync_state_host {
794 struct pf_addr addr;
795 u_int16_t port;
796 u_int16_t pad[3];
797 } __packed;
798
799 struct pfsync_state_peer {
800 struct pfsync_state_scrub scrub; /* state is scrubbed */
801 u_int32_t seqlo; /* Max sequence number sent */
802 u_int32_t seqhi; /* Max the other end ACKd + win */
803 u_int32_t seqdiff; /* Sequence number modulator */
804 u_int16_t max_win; /* largest window (pre scaling) */
805 u_int16_t mss; /* Maximum segment size option */
806 u_int8_t state; /* active state level */
807 u_int8_t wscale; /* window scaling factor */
808 u_int8_t pad[6];
809 } __packed;
810
811 struct pfsync_state {
812 u_int32_t id[2];
813 char ifname[IFNAMSIZ];
814 struct pfsync_state_host lan;
815 struct pfsync_state_host gwy;
816 struct pfsync_state_host ext;
817 struct pfsync_state_peer src;
818 struct pfsync_state_peer dst;
819 struct pf_addr rt_addr;
820 u_int32_t rule;
821 u_int32_t anchor;
822 u_int32_t nat_rule;
823 u_int32_t creation;
824 u_int32_t expire;
825 u_int32_t packets[2][2];
826 u_int32_t bytes[2][2];
827 u_int32_t creatorid;
828 sa_family_t af;
829 u_int8_t proto;
830 u_int8_t direction;
831 u_int8_t log;
832 u_int8_t allow_opts;
833 u_int8_t timeout;
834 u_int8_t sync_flags;
835 u_int8_t updates;
836 } __packed;
837
838 #define PFSYNC_FLAG_COMPRESS 0x01
839 #define PFSYNC_FLAG_STALE 0x02
840 #define PFSYNC_FLAG_SRCNODE 0x04
841 #define PFSYNC_FLAG_NATSRCNODE 0x08
842
843 /* for copies to/from userland via pf_ioctl() */
844 #define pf_state_peer_to_pfsync(s,d) do { \
845 (d)->seqlo = (s)->seqlo; \
846 (d)->seqhi = (s)->seqhi; \
847 (d)->seqdiff = (s)->seqdiff; \
848 (d)->max_win = (s)->max_win; \
849 (d)->mss = (s)->mss; \
850 (d)->state = (s)->state; \
851 (d)->wscale = (s)->wscale; \
852 if ((s)->scrub) { \
853 (d)->scrub.pfss_flags = \
854 (s)->scrub->pfss_flags & PFSS_TIMESTAMP; \
855 (d)->scrub.pfss_ttl = (s)->scrub->pfss_ttl; \
856 (d)->scrub.pfss_ts_mod = (s)->scrub->pfss_ts_mod; \
857 (d)->scrub.scrub_flag = PFSYNC_SCRUB_FLAG_VALID; \
858 } \
859 } while (0)
860
861 #define pf_state_peer_from_pfsync(s,d) do { \
862 (d)->seqlo = (s)->seqlo; \
863 (d)->seqhi = (s)->seqhi; \
864 (d)->seqdiff = (s)->seqdiff; \
865 (d)->max_win = (s)->max_win; \
866 (d)->mss = ntohs((s)->mss); \
867 (d)->state = (s)->state; \
868 (d)->wscale = (s)->wscale; \
869 if ((s)->scrub.scrub_flag == PFSYNC_SCRUB_FLAG_VALID && \
870 (d)->scrub != NULL) { \
871 (d)->scrub->pfss_flags = \
872 ntohs((s)->scrub.pfss_flags) & PFSS_TIMESTAMP; \
873 (d)->scrub->pfss_ttl = (s)->scrub.pfss_ttl; \
874 (d)->scrub->pfss_ts_mod = (s)->scrub.pfss_ts_mod; \
875 } \
876 } while (0)
877
878 #define pf_state_counter_to_pfsync(s,d) do { \
879 d[0] = (s>>32)&0xffffffff; \
880 d[1] = s&0xffffffff; \
881 } while (0)
882
883 #define pf_state_counter_from_pfsync(s) \
884 (((u_int64_t)(s[0])<<32) | (u_int64_t)(s[1]))
885
886
887
888 TAILQ_HEAD(pf_rulequeue, pf_rule);
889
890 struct pf_anchor;
891
892 struct pf_ruleset {
893 struct {
894 struct pf_rulequeue queues[2];
895 struct {
896 struct pf_rulequeue *ptr;
897 struct pf_rule **ptr_array;
898 u_int32_t rcount;
899 u_int32_t ticket;
900 int open;
901 } active, inactive;
902 } rules[PF_RULESET_MAX];
903 struct pf_anchor *anchor;
904 u_int32_t tticket;
905 int tables;
906 int topen;
907 };
908
909 RB_HEAD(pf_anchor_global, pf_anchor);
910 RB_HEAD(pf_anchor_node, pf_anchor);
911 struct pf_anchor {
912 RB_ENTRY(pf_anchor) entry_global;
913 RB_ENTRY(pf_anchor) entry_node;
914 struct pf_anchor *parent;
915 struct pf_anchor_node children;
916 char name[PF_ANCHOR_NAME_SIZE];
917 char path[MAXPATHLEN];
918 struct pf_ruleset ruleset;
919 int refcnt; /* anchor rules */
920 int match;
921 };
922 RB_PROTOTYPE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare);
923 RB_PROTOTYPE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare);
924
925 #define PF_RESERVED_ANCHOR "_pf"
926
927 #define PFR_TFLAG_PERSIST 0x00000001
928 #define PFR_TFLAG_CONST 0x00000002
929 #define PFR_TFLAG_ACTIVE 0x00000004
930 #define PFR_TFLAG_INACTIVE 0x00000008
931 #define PFR_TFLAG_REFERENCED 0x00000010
932 #define PFR_TFLAG_REFDANCHOR 0x00000020
933 #define PFR_TFLAG_USRMASK 0x00000003
934 #define PFR_TFLAG_SETMASK 0x0000003C
935 #define PFR_TFLAG_ALLMASK 0x0000003F
936
937 struct pfr_table {
938 char pfrt_anchor[MAXPATHLEN];
939 char pfrt_name[PF_TABLE_NAME_SIZE];
940 u_int32_t pfrt_flags;
941 u_int8_t pfrt_fback;
942 };
943
944 enum { PFR_FB_NONE, PFR_FB_MATCH, PFR_FB_ADDED, PFR_FB_DELETED,
945 PFR_FB_CHANGED, PFR_FB_CLEARED, PFR_FB_DUPLICATE,
946 PFR_FB_NOTMATCH, PFR_FB_CONFLICT, PFR_FB_MAX };
947
948 struct pfr_addr {
949 union {
950 struct in_addr _pfra_ip4addr;
951 struct in6_addr _pfra_ip6addr;
952 } pfra_u;
953 u_int8_t pfra_af;
954 u_int8_t pfra_net;
955 u_int8_t pfra_not;
956 u_int8_t pfra_fback;
957 };
958 #define pfra_ip4addr pfra_u._pfra_ip4addr
959 #define pfra_ip6addr pfra_u._pfra_ip6addr
960
961 enum { PFR_DIR_IN, PFR_DIR_OUT, PFR_DIR_MAX };
962 enum { PFR_OP_BLOCK, PFR_OP_PASS, PFR_OP_ADDR_MAX, PFR_OP_TABLE_MAX };
963 #define PFR_OP_XPASS PFR_OP_ADDR_MAX
964
965 struct pfr_astats {
966 struct pfr_addr pfras_a;
967 u_int64_t pfras_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX];
968 u_int64_t pfras_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX];
969 long pfras_tzero;
970 };
971
972 enum { PFR_REFCNT_RULE, PFR_REFCNT_ANCHOR, PFR_REFCNT_MAX };
973
974 struct pfr_tstats {
975 struct pfr_table pfrts_t;
976 u_int64_t pfrts_packets[PFR_DIR_MAX][PFR_OP_TABLE_MAX];
977 u_int64_t pfrts_bytes[PFR_DIR_MAX][PFR_OP_TABLE_MAX];
978 u_int64_t pfrts_match;
979 u_int64_t pfrts_nomatch;
980 long pfrts_tzero;
981 int pfrts_cnt;
982 int pfrts_refcnt[PFR_REFCNT_MAX];
983 };
984 #define pfrts_name pfrts_t.pfrt_name
985 #define pfrts_flags pfrts_t.pfrt_flags
986
987 SLIST_HEAD(pfr_kentryworkq, pfr_kentry);
988 struct pfr_kentry {
989 struct radix_node pfrke_node[2];
990 union sockaddr_union pfrke_sa;
991 u_int64_t pfrke_packets[PFR_DIR_MAX][PFR_OP_ADDR_MAX];
992 u_int64_t pfrke_bytes[PFR_DIR_MAX][PFR_OP_ADDR_MAX];
993 SLIST_ENTRY(pfr_kentry) pfrke_workq;
994 long pfrke_tzero;
995 u_int8_t pfrke_af;
996 u_int8_t pfrke_net;
997 u_int8_t pfrke_not;
998 u_int8_t pfrke_mark;
999 u_int8_t pfrke_intrpool;
1000 };
1001
1002 SLIST_HEAD(pfr_ktableworkq, pfr_ktable);
1003 RB_HEAD(pfr_ktablehead, pfr_ktable);
1004 struct pfr_ktable {
1005 struct pfr_tstats pfrkt_ts;
1006 RB_ENTRY(pfr_ktable) pfrkt_tree;
1007 SLIST_ENTRY(pfr_ktable) pfrkt_workq;
1008 struct radix_node_head *pfrkt_ip4;
1009 struct radix_node_head *pfrkt_ip6;
1010 struct pfr_ktable *pfrkt_shadow;
1011 struct pfr_ktable *pfrkt_root;
1012 struct pf_ruleset *pfrkt_rs;
1013 long pfrkt_larg;
1014 int pfrkt_nflags;
1015 };
1016 #define pfrkt_t pfrkt_ts.pfrts_t
1017 #define pfrkt_name pfrkt_t.pfrt_name
1018 #define pfrkt_anchor pfrkt_t.pfrt_anchor
1019 #define pfrkt_ruleset pfrkt_t.pfrt_ruleset
1020 #define pfrkt_flags pfrkt_t.pfrt_flags
1021 #define pfrkt_cnt pfrkt_ts.pfrts_cnt
1022 #define pfrkt_refcnt pfrkt_ts.pfrts_refcnt
1023 #define pfrkt_packets pfrkt_ts.pfrts_packets
1024 #define pfrkt_bytes pfrkt_ts.pfrts_bytes
1025 #define pfrkt_match pfrkt_ts.pfrts_match
1026 #define pfrkt_nomatch pfrkt_ts.pfrts_nomatch
1027 #define pfrkt_tzero pfrkt_ts.pfrts_tzero
1028
1029 RB_HEAD(pf_state_tree_lan_ext, pf_state_key);
1030 RB_PROTOTYPE(pf_state_tree_lan_ext, pf_state_key,
1031 entry_lan_ext, pf_state_compare_lan_ext);
1032
1033 RB_HEAD(pf_state_tree_ext_gwy, pf_state_key);
1034 RB_PROTOTYPE(pf_state_tree_ext_gwy, pf_state_key,
1035 entry_ext_gwy, pf_state_compare_ext_gwy);
1036
1037 RB_HEAD(pfi_ifhead, pfi_kif);
1038
1039 /* state tables */
1040 extern struct pf_state_tree_lan_ext pf_statetbl_lan_ext;
1041 extern struct pf_state_tree_ext_gwy pf_statetbl_ext_gwy;
1042
1043 /* keep synced with pfi_kif, used in RB_FIND */
1044 struct pfi_kif_cmp {
1045 char pfik_name[IFNAMSIZ];
1046 };
1047
1048 struct pfi_kif {
1049 char pfik_name[IFNAMSIZ];
1050 RB_ENTRY(pfi_kif) pfik_tree;
1051 u_int64_t pfik_packets[2][2][2];
1052 u_int64_t pfik_bytes[2][2][2];
1053 u_int32_t pfik_tzero;
1054 int pfik_flags;
1055 void *pfik_ah_cookie;
1056 struct ifnet *pfik_ifp;
1057 struct ifg_group *pfik_group;
1058 int pfik_states;
1059 int pfik_rules;
1060 TAILQ_HEAD(, pfi_dynaddr) pfik_dynaddrs;
1061 };
1062
1063 enum pfi_kif_refs {
1064 PFI_KIF_REF_NONE,
1065 PFI_KIF_REF_STATE,
1066 PFI_KIF_REF_RULE
1067 };
1068
1069 #define PFI_IFLAG_SKIP 0x0100 /* skip filtering on interface */
1070
1071 struct pf_pdesc {
1072 struct {
1073 int done;
1074 uid_t uid;
1075 gid_t gid;
1076 pid_t pid;
1077 } lookup;
1078 u_int64_t tot_len; /* Make Mickey money */
1079 union {
1080 struct tcphdr *tcp;
1081 struct udphdr *udp;
1082 struct icmp *icmp;
1083 #ifdef INET6
1084 struct icmp6_hdr *icmp6;
1085 #endif /* INET6 */
1086 void *any;
1087 } hdr;
1088 struct pf_addr baddr; /* address before translation */
1089 struct pf_addr naddr; /* address after translation */
1090 struct pf_rule *nat_rule; /* nat/rdr rule applied to packet */
1091 struct pf_addr *src;
1092 struct pf_addr *dst;
1093 struct ether_header
1094 *eh;
1095 u_int16_t *ip_sum;
1096 u_int32_t p_len; /* total length of payload */
1097 u_int16_t flags; /* Let SCRUB trigger behavior in
1098 * state code. Easier than tags */
1099 #define PFDESC_TCP_NORM 0x0001 /* TCP shall be statefully scrubbed */
1100 #define PFDESC_IP_REAS 0x0002 /* IP frags would've been reassembled */
1101 sa_family_t af;
1102 u_int8_t proto;
1103 u_int8_t tos;
1104 };
1105
1106 /* flags for RDR options */
1107 #define PF_DPORT_RANGE 0x01 /* Dest port uses range */
1108 #define PF_RPORT_RANGE 0x02 /* RDR'ed port uses range */
1109
1110 /* Reasons code for passing/dropping a packet */
1111 #define PFRES_MATCH 0 /* Explicit match of a rule */
1112 #define PFRES_BADOFF 1 /* Bad offset for pull_hdr */
1113 #define PFRES_FRAG 2 /* Dropping following fragment */
1114 #define PFRES_SHORT 3 /* Dropping short packet */
1115 #define PFRES_NORM 4 /* Dropping by normalizer */
1116 #define PFRES_MEMORY 5 /* Dropped due to lacking mem */
1117 #define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */
1118 #define PFRES_CONGEST 7 /* Congestion (of ipintrq) */
1119 #define PFRES_IPOPTIONS 8 /* IP option */
1120 #define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */
1121 #define PFRES_BADSTATE 10 /* State mismatch */
1122 #define PFRES_STATEINS 11 /* State insertion failure */
1123 #define PFRES_MAXSTATES 12 /* State limit */
1124 #define PFRES_SRCLIMIT 13 /* Source node/conn limit */
1125 #define PFRES_SYNPROXY 14 /* SYN proxy */
1126 #define PFRES_MAX 15 /* total+1 */
1127
1128 #define PFRES_NAMES { \
1129 "match", \
1130 "bad-offset", \
1131 "fragment", \
1132 "short", \
1133 "normalize", \
1134 "memory", \
1135 "bad-timestamp", \
1136 "congestion", \
1137 "ip-option", \
1138 "proto-cksum", \
1139 "state-mismatch", \
1140 "state-insert", \
1141 "state-limit", \
1142 "src-limit", \
1143 "synproxy", \
1144 NULL \
1145 }
1146
1147 /* Counters for other things we want to keep track of */
1148 #define LCNT_STATES 0 /* states */
1149 #define LCNT_SRCSTATES 1 /* max-src-states */
1150 #define LCNT_SRCNODES 2 /* max-src-nodes */
1151 #define LCNT_SRCCONN 3 /* max-src-conn */
1152 #define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */
1153 #define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */
1154 #define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */
1155 #define LCNT_MAX 7 /* total+1 */
1156
1157 #define LCNT_NAMES { \
1158 "max states per rule", \
1159 "max-src-states", \
1160 "max-src-nodes", \
1161 "max-src-conn", \
1162 "max-src-conn-rate", \
1163 "overload table insertion", \
1164 "overload flush states", \
1165 NULL \
1166 }
1167
1168 /* UDP state enumeration */
1169 #define PFUDPS_NO_TRAFFIC 0
1170 #define PFUDPS_SINGLE 1
1171 #define PFUDPS_MULTIPLE 2
1172
1173 #define PFUDPS_NSTATES 3 /* number of state levels */
1174
1175 #define PFUDPS_NAMES { \
1176 "NO_TRAFFIC", \
1177 "SINGLE", \
1178 "MULTIPLE", \
1179 NULL \
1180 }
1181
1182 /* Other protocol state enumeration */
1183 #define PFOTHERS_NO_TRAFFIC 0
1184 #define PFOTHERS_SINGLE 1
1185 #define PFOTHERS_MULTIPLE 2
1186
1187 #define PFOTHERS_NSTATES 3 /* number of state levels */
1188
1189 #define PFOTHERS_NAMES { \
1190 "NO_TRAFFIC", \
1191 "SINGLE", \
1192 "MULTIPLE", \
1193 NULL \
1194 }
1195
1196 #define FCNT_STATE_SEARCH 0
1197 #define FCNT_STATE_INSERT 1
1198 #define FCNT_STATE_REMOVALS 2
1199 #define FCNT_MAX 3
1200
1201 #define SCNT_SRC_NODE_SEARCH 0
1202 #define SCNT_SRC_NODE_INSERT 1
1203 #define SCNT_SRC_NODE_REMOVALS 2
1204 #define SCNT_MAX 3
1205
1206 #define ACTION_SET(a, x) \
1207 do { \
1208 if ((a) != NULL) \
1209 *(a) = (x); \
1210 } while (0)
1211
1212 #define REASON_SET(a, x) \
1213 do { \
1214 if ((a) != NULL) \
1215 *(a) = (x); \
1216 if (x < PFRES_MAX) \
1217 pf_status.counters[x]++; \
1218 } while (0)
1219
1220 struct pf_status {
1221 u_int64_t counters[PFRES_MAX];
1222 u_int64_t lcounters[LCNT_MAX]; /* limit counters */
1223 u_int64_t fcounters[FCNT_MAX];
1224 u_int64_t scounters[SCNT_MAX];
1225 u_int64_t pcounters[2][2][3];
1226 u_int64_t bcounters[2][2];
1227 u_int64_t stateid;
1228 u_int32_t running;
1229 u_int32_t states;
1230 u_int32_t src_nodes;
1231 u_int32_t since;
1232 u_int32_t debug;
1233 u_int32_t hostid;
1234 char ifname[IFNAMSIZ];
1235 u_int8_t pf_chksum[PF_MD5_DIGEST_LENGTH];
1236 };
1237
1238 struct cbq_opts {
1239 u_int minburst;
1240 u_int maxburst;
1241 u_int pktsize;
1242 u_int maxpktsize;
1243 u_int ns_per_byte;
1244 u_int maxidle;
1245 int minidle;
1246 u_int offtime;
1247 int flags;
1248 };
1249
1250 struct priq_opts {
1251 int flags;
1252 };
1253
1254 struct hfsc_opts {
1255 /* real-time service curve */
1256 u_int rtsc_m1; /* slope of the 1st segment in bps */
1257 u_int rtsc_d; /* the x-projection of m1 in msec */
1258 u_int rtsc_m2; /* slope of the 2nd segment in bps */
1259 /* link-sharing service curve */
1260 u_int lssc_m1;
1261 u_int lssc_d;
1262 u_int lssc_m2;
1263 /* upper-limit service curve */
1264 u_int ulsc_m1;
1265 u_int ulsc_d;
1266 u_int ulsc_m2;
1267 int flags;
1268 };
1269
1270 struct pf_altq {
1271 char ifname[IFNAMSIZ];
1272
1273 void *altq_disc; /* discipline-specific state */
1274 TAILQ_ENTRY(pf_altq) entries;
1275
1276 /* scheduler spec */
1277 u_int8_t scheduler; /* scheduler type */
1278 u_int16_t tbrsize; /* tokenbucket regulator size */
1279 u_int32_t ifbandwidth; /* interface bandwidth */
1280
1281 /* queue spec */
1282 char qname[PF_QNAME_SIZE]; /* queue name */
1283 char parent[PF_QNAME_SIZE]; /* parent name */
1284 u_int32_t parent_qid; /* parent queue id */
1285 u_int32_t bandwidth; /* queue bandwidth */
1286 u_int8_t priority; /* priority */
1287 u_int16_t qlimit; /* queue size limit */
1288 u_int16_t flags; /* misc flags */
1289 union {
1290 struct cbq_opts cbq_opts;
1291 struct priq_opts priq_opts;
1292 struct hfsc_opts hfsc_opts;
1293 } pq_u;
1294
1295 u_int32_t qid; /* return value */
1296 };
1297
1298 struct pf_tag {
1299 u_int16_t tag; /* tag id */
1300 };
1301
1302 struct pf_tagname {
1303 TAILQ_ENTRY(pf_tagname) entries;
1304 char name[PF_TAG_NAME_SIZE];
1305 u_int16_t tag;
1306 int ref;
1307 };
1308
1309 #define PFFRAG_FRENT_HIWAT 5000 /* Number of fragment entries */
1310 #define PFFRAG_FRAG_HIWAT 1000 /* Number of fragmented packets */
1311 #define PFFRAG_FRCENT_HIWAT 50000 /* Number of fragment cache entries */
1312 #define PFFRAG_FRCACHE_HIWAT 10000 /* Number of fragment descriptors */
1313
1314 #define PFR_KTABLE_HIWAT 1000 /* Number of tables */
1315 #define PFR_KENTRY_HIWAT 200000 /* Number of table entries */
1316 #define PFR_KENTRY_HIWAT_SMALL 100000 /* Number of table entries (tiny hosts) */
1317
1318 /*
1319 * ioctl parameter structures
1320 */
1321
1322 struct pfioc_pooladdr {
1323 u_int32_t action;
1324 u_int32_t ticket;
1325 u_int32_t nr;
1326 u_int32_t r_num;
1327 u_int8_t r_action;
1328 u_int8_t r_last;
1329 u_int8_t af;
1330 char anchor[MAXPATHLEN];
1331 struct pf_pooladdr addr;
1332 };
1333
1334 struct pfioc_rule {
1335 u_int32_t action;
1336 u_int32_t ticket;
1337 u_int32_t pool_ticket;
1338 u_int32_t nr;
1339 char anchor[MAXPATHLEN];
1340 char anchor_call[MAXPATHLEN];
1341 struct pf_rule rule;
1342 };
1343
1344 struct pfioc_natlook {
1345 struct pf_addr saddr;
1346 struct pf_addr daddr;
1347 struct pf_addr rsaddr;
1348 struct pf_addr rdaddr;
1349 u_int16_t sport;
1350 u_int16_t dport;
1351 u_int16_t rsport;
1352 u_int16_t rdport;
1353 sa_family_t af;
1354 u_int8_t proto;
1355 u_int8_t direction;
1356 };
1357
1358 struct pfioc_state {
1359 u_int32_t nr;
1360 void *state;
1361 };
1362
1363 struct pfioc_src_node_kill {
1364 /* XXX returns the number of src nodes killed in psnk_af */
1365 sa_family_t psnk_af;
1366 struct pf_rule_addr psnk_src;
1367 struct pf_rule_addr psnk_dst;
1368 };
1369
1370 struct pfioc_state_kill {
1371 /* XXX returns the number of states killed in psk_af */
1372 sa_family_t psk_af;
1373 int psk_proto;
1374 struct pf_rule_addr psk_src;
1375 struct pf_rule_addr psk_dst;
1376 char psk_ifname[IFNAMSIZ];
1377 };
1378
1379 struct pfioc_states {
1380 int ps_len;
1381 union {
1382 void *psu_buf;
1383 struct pfsync_state *psu_states;
1384 } ps_u;
1385 #define ps_buf ps_u.psu_buf
1386 #define ps_states ps_u.psu_states
1387 };
1388
1389 struct pfioc_src_nodes {
1390 int psn_len;
1391 union {
1392 void *psu_buf;
1393 struct pf_src_node *psu_src_nodes;
1394 } psn_u;
1395 #define psn_buf psn_u.psu_buf
1396 #define psn_src_nodes psn_u.psu_src_nodes
1397 };
1398
1399 struct pfioc_if {
1400 char ifname[IFNAMSIZ];
1401 };
1402
1403 struct pfioc_tm {
1404 int timeout;
1405 int seconds;
1406 };
1407
1408 struct pfioc_limit {
1409 int index;
1410 unsigned limit;
1411 };
1412
1413 struct pfioc_altq {
1414 u_int32_t action;
1415 u_int32_t ticket;
1416 u_int32_t nr;
1417 struct pf_altq altq;
1418 };
1419
1420 struct pfioc_qstats {
1421 u_int32_t ticket;
1422 u_int32_t nr;
1423 void *buf;
1424 int nbytes;
1425 u_int8_t scheduler;
1426 };
1427
1428 struct pfioc_ruleset {
1429 u_int32_t nr;
1430 char path[MAXPATHLEN];
1431 char name[PF_ANCHOR_NAME_SIZE];
1432 };
1433
1434 #define PF_RULESET_ALTQ (PF_RULESET_MAX)
1435 #define PF_RULESET_TABLE (PF_RULESET_MAX+1)
1436 struct pfioc_trans {
1437 int size; /* number of elements */
1438 int esize; /* size of each element in bytes */
1439 struct pfioc_trans_e {
1440 int rs_num;
1441 char anchor[MAXPATHLEN];
1442 u_int32_t ticket;
1443 } *array;
1444 };
1445
1446 #define PFR_FLAG_ATOMIC 0x00000001
1447 #define PFR_FLAG_DUMMY 0x00000002
1448 #define PFR_FLAG_FEEDBACK 0x00000004
1449 #define PFR_FLAG_CLSTATS 0x00000008
1450 #define PFR_FLAG_ADDRSTOO 0x00000010
1451 #define PFR_FLAG_REPLACE 0x00000020
1452 #define PFR_FLAG_ALLRSETS 0x00000040
1453 #define PFR_FLAG_ALLMASK 0x0000007F
1454 #ifdef _KERNEL
1455 #define PFR_FLAG_USERIOCTL 0x10000000
1456 #endif
1457
1458 struct pfioc_table {
1459 struct pfr_table pfrio_table;
1460 void *pfrio_buffer;
1461 int pfrio_esize;
1462 int pfrio_size;
1463 int pfrio_size2;
1464 int pfrio_nadd;
1465 int pfrio_ndel;
1466 int pfrio_nchange;
1467 int pfrio_flags;
1468 u_int32_t pfrio_ticket;
1469 };
1470 #define pfrio_exists pfrio_nadd
1471 #define pfrio_nzero pfrio_nadd
1472 #define pfrio_nmatch pfrio_nadd
1473 #define pfrio_naddr pfrio_size2
1474 #define pfrio_setflag pfrio_size2
1475 #define pfrio_clrflag pfrio_nadd
1476
1477 struct pfioc_iface {
1478 char pfiio_name[IFNAMSIZ];
1479 void *pfiio_buffer;
1480 int pfiio_esize;
1481 int pfiio_size;
1482 int pfiio_nzero;
1483 int pfiio_flags;
1484 };
1485
1486
1487 /*
1488 * ioctl operations
1489 */
1490
1491 #define DIOCSTART _IO ('D', 1)
1492 #define DIOCSTOP _IO ('D', 2)
1493 #define DIOCADDRULE _IOWR('D', 4, struct pfioc_rule)
1494 #define DIOCGETRULES _IOWR('D', 6, struct pfioc_rule)
1495 #define DIOCGETRULE _IOWR('D', 7, struct pfioc_rule)
1496 /* XXX cut 8 - 17 */
1497 #define DIOCCLRSTATES _IOWR('D', 18, struct pfioc_state_kill)
1498 #define DIOCGETSTATE _IOWR('D', 19, struct pfioc_state)
1499 #define DIOCSETSTATUSIF _IOWR('D', 20, struct pfioc_if)
1500 #define DIOCGETSTATUS _IOWR('D', 21, struct pf_status)
1501 #define DIOCCLRSTATUS _IO ('D', 22)
1502 #define DIOCNATLOOK _IOWR('D', 23, struct pfioc_natlook)
1503 #define DIOCSETDEBUG _IOWR('D', 24, u_int32_t)
1504 #define DIOCGETSTATES _IOWR('D', 25, struct pfioc_states)
1505 #define DIOCCHANGERULE _IOWR('D', 26, struct pfioc_rule)
1506 /* XXX cut 26 - 28 */
1507 #define DIOCSETTIMEOUT _IOWR('D', 29, struct pfioc_tm)
1508 #define DIOCGETTIMEOUT _IOWR('D', 30, struct pfioc_tm)
1509 #define DIOCADDSTATE _IOWR('D', 37, struct pfioc_state)
1510 #define DIOCCLRRULECTRS _IO ('D', 38)
1511 #define DIOCGETLIMIT _IOWR('D', 39, struct pfioc_limit)
1512 #define DIOCSETLIMIT _IOWR('D', 40, struct pfioc_limit)
1513 #define DIOCKILLSTATES _IOWR('D', 41, struct pfioc_state_kill)
1514 #define DIOCSTARTALTQ _IO ('D', 42)
1515 #define DIOCSTOPALTQ _IO ('D', 43)
1516 #define DIOCADDALTQ _IOWR('D', 45, struct pfioc_altq)
1517 #define DIOCGETALTQS _IOWR('D', 47, struct pfioc_altq)
1518 #define DIOCGETALTQ _IOWR('D', 48, struct pfioc_altq)
1519 #define DIOCCHANGEALTQ _IOWR('D', 49, struct pfioc_altq)
1520 #define DIOCGETQSTATS _IOWR('D', 50, struct pfioc_qstats)
1521 #define DIOCBEGINADDRS _IOWR('D', 51, struct pfioc_pooladdr)
1522 #define DIOCADDADDR _IOWR('D', 52, struct pfioc_pooladdr)
1523 #define DIOCGETADDRS _IOWR('D', 53, struct pfioc_pooladdr)
1524 #define DIOCGETADDR _IOWR('D', 54, struct pfioc_pooladdr)
1525 #define DIOCCHANGEADDR _IOWR('D', 55, struct pfioc_pooladdr)
1526 /* XXX cut 55 - 57 */
1527 #define DIOCGETRULESETS _IOWR('D', 58, struct pfioc_ruleset)
1528 #define DIOCGETRULESET _IOWR('D', 59, struct pfioc_ruleset)
1529 #define DIOCRCLRTABLES _IOWR('D', 60, struct pfioc_table)
1530 #define DIOCRADDTABLES _IOWR('D', 61, struct pfioc_table)
1531 #define DIOCRDELTABLES _IOWR('D', 62, struct pfioc_table)
1532 #define DIOCRGETTABLES _IOWR('D', 63, struct pfioc_table)
1533 #define DIOCRGETTSTATS _IOWR('D', 64, struct pfioc_table)
1534 #define DIOCRCLRTSTATS _IOWR('D', 65, struct pfioc_table)
1535 #define DIOCRCLRADDRS _IOWR('D', 66, struct pfioc_table)
1536 #define DIOCRADDADDRS _IOWR('D', 67, struct pfioc_table)
1537 #define DIOCRDELADDRS _IOWR('D', 68, struct pfioc_table)
1538 #define DIOCRSETADDRS _IOWR('D', 69, struct pfioc_table)
1539 #define DIOCRGETADDRS _IOWR('D', 70, struct pfioc_table)
1540 #define DIOCRGETASTATS _IOWR('D', 71, struct pfioc_table)
1541 #define DIOCRCLRASTATS _IOWR('D', 72, struct pfioc_table)
1542 #define DIOCRTSTADDRS _IOWR('D', 73, struct pfioc_table)
1543 #define DIOCRSETTFLAGS _IOWR('D', 74, struct pfioc_table)
1544 #define DIOCRINADEFINE _IOWR('D', 77, struct pfioc_table)
1545 #define DIOCOSFPFLUSH _IO('D', 78)
1546 #define DIOCOSFPADD _IOWR('D', 79, struct pf_osfp_ioctl)
1547 #define DIOCOSFPGET _IOWR('D', 80, struct pf_osfp_ioctl)
1548 #define DIOCXBEGIN _IOWR('D', 81, struct pfioc_trans)
1549 #define DIOCXCOMMIT _IOWR('D', 82, struct pfioc_trans)
1550 #define DIOCXROLLBACK _IOWR('D', 83, struct pfioc_trans)
1551 #define DIOCGETSRCNODES _IOWR('D', 84, struct pfioc_src_nodes)
1552 #define DIOCCLRSRCNODES _IO('D', 85)
1553 #define DIOCSETHOSTID _IOWR('D', 86, u_int32_t)
1554 #define DIOCIGETIFACES _IOWR('D', 87, struct pfioc_iface)
1555 #define DIOCSETIFFLAG _IOWR('D', 89, struct pfioc_iface)
1556 #define DIOCCLRIFFLAG _IOWR('D', 90, struct pfioc_iface)
1557 #define DIOCKILLSRCNODES _IOWR('D', 91, struct pfioc_src_node_kill)
1558
1559 #ifdef _KERNEL
1560 RB_HEAD(pf_src_tree, pf_src_node);
1561 RB_PROTOTYPE(pf_src_tree, pf_src_node, entry, pf_src_compare);
1562 extern struct pf_src_tree tree_src_tracking;
1563
1564 RB_HEAD(pf_state_tree_id, pf_state);
1565 RB_PROTOTYPE(pf_state_tree_id, pf_state,
1566 entry_id, pf_state_compare_id);
1567 extern struct pf_state_tree_id tree_id;
1568 extern struct pf_state_queue state_list;
1569
1570 TAILQ_HEAD(pf_poolqueue, pf_pool);
1571 extern struct pf_poolqueue pf_pools[2];
1572 TAILQ_HEAD(pf_altqqueue, pf_altq);
1573 extern struct pf_altqqueue pf_altqs[2];
1574 extern struct pf_palist pf_pabuf;
1575
1576 extern u_int32_t ticket_altqs_active;
1577 extern u_int32_t ticket_altqs_inactive;
1578 extern int altqs_inactive_open;
1579 extern u_int32_t ticket_pabuf;
1580 extern struct pf_altqqueue *pf_altqs_active;
1581 extern struct pf_altqqueue *pf_altqs_inactive;
1582 extern struct pf_poolqueue *pf_pools_active;
1583 extern struct pf_poolqueue *pf_pools_inactive;
1584 extern int pf_tbladdr_setup(struct pf_ruleset *,
1585 struct pf_addr_wrap *);
1586 extern void pf_tbladdr_remove(struct pf_addr_wrap *);
1587 extern void pf_tbladdr_copyout(struct pf_addr_wrap *);
1588 extern void pf_calc_skip_steps(struct pf_rulequeue *);
1589 extern struct pool pf_src_tree_pl, pf_rule_pl;
1590 extern struct pool pf_state_pl, pf_state_key_pl, pf_altq_pl,
1591 pf_pooladdr_pl;
1592 extern struct pool pf_state_scrub_pl;
1593 extern void pf_purge_thread(void *);
1594 extern void pf_purge_expired_src_nodes(int);
1595 extern void pf_purge_expired_states(u_int32_t);
1596 extern void pf_unlink_state(struct pf_state *);
1597 extern void pf_free_state(struct pf_state *);
1598 extern int pf_insert_state(struct pfi_kif *,
1599 struct pf_state *);
1600 extern int pf_insert_src_node(struct pf_src_node **,
1601 struct pf_rule *, struct pf_addr *,
1602 sa_family_t);
1603 void pf_src_tree_remove_state(struct pf_state *);
1604 extern struct pf_state *pf_find_state_byid(struct pf_state_cmp *);
1605 extern struct pf_state *pf_find_state_all(struct pf_state_key_cmp *,
1606 u_int8_t, int *);
1607 extern void pf_print_state(struct pf_state *);
1608 extern void pf_print_flags(u_int8_t);
1609 extern u_int16_t pf_cksum_fixup(u_int16_t, u_int16_t, u_int16_t,
1610 u_int8_t);
1611
1612 extern struct ifnet *sync_ifp;
1613 extern struct pf_rule pf_default_rule;
1614 extern void pf_addrcpy(struct pf_addr *,
1615 const struct pf_addr *, u_int8_t);
1616 void pf_rm_rule(struct pf_rulequeue *,
1617 struct pf_rule *);
1618
1619 #ifdef INET
1620 int pf_test(int, struct ifnet *, struct mbuf **, struct ether_header *);
1621 #endif /* INET */
1622
1623 #ifdef INET6
1624 int pf_test6(int, struct ifnet *, struct mbuf **, struct ether_header *);
1625 void pf_poolmask(struct pf_addr *, struct pf_addr*,
1626 struct pf_addr *, const struct pf_addr *, u_int8_t);
1627 void pf_addr_inc(struct pf_addr *, sa_family_t);
1628 #endif /* INET6 */
1629
1630 void *pf_pull_hdr(struct mbuf *, int, void *, int, u_short *, u_short *,
1631 sa_family_t);
1632 void pf_change_a(void *, u_int16_t *, u_int32_t, u_int8_t);
1633 int pflog_packet(struct pfi_kif *, struct mbuf *, sa_family_t, u_int8_t,
1634 u_int8_t, struct pf_rule *, struct pf_rule *, struct pf_ruleset *,
1635 struct pf_pdesc *);
1636 int pf_match_addr(u_int8_t, struct pf_addr *, struct pf_addr *,
1637 struct pf_addr *, sa_family_t);
1638 int pf_match(u_int8_t, u_int32_t, u_int32_t, u_int32_t);
1639 int pf_match_port(u_int8_t, u_int16_t, u_int16_t, u_int16_t);
1640 int pf_match_uid(u_int8_t, uid_t, uid_t, uid_t);
1641 int pf_match_gid(u_int8_t, gid_t, gid_t, gid_t);
1642
1643 void pf_normalize_init(void);
1644 int pf_normalize_ip(struct mbuf **, int, struct pfi_kif *, u_short *,
1645 struct pf_pdesc *);
1646 int pf_normalize_ip6(struct mbuf **, int, struct pfi_kif *, u_short *,
1647 struct pf_pdesc *);
1648 int pf_normalize_tcp(int, struct pfi_kif *, struct mbuf *, int, int, void *,
1649 struct pf_pdesc *);
1650 void pf_normalize_tcp_cleanup(struct pf_state *);
1651 int pf_normalize_tcp_init(struct mbuf *, int, struct pf_pdesc *,
1652 struct tcphdr *, struct pf_state_peer *, struct pf_state_peer *);
1653 int pf_normalize_tcp_stateful(struct mbuf *, int, struct pf_pdesc *,
1654 u_short *, struct tcphdr *, struct pf_state *,
1655 struct pf_state_peer *, struct pf_state_peer *, int *);
1656 u_int32_t
1657 pf_state_expires(const struct pf_state *);
1658 void pf_purge_expired_fragments(void);
1659 int pf_routable(struct pf_addr *addr, sa_family_t af, struct pfi_kif *);
1660 int pf_rtlabel_match(struct pf_addr *, sa_family_t, struct pf_addr_wrap *);
1661 int pf_socket_lookup(int, struct pf_pdesc *);
1662 struct pf_state_key *
1663 pf_alloc_state_key(struct pf_state *);
1664 void pfr_initialize(void);
1665 int pfr_match_addr(struct pfr_ktable *, struct pf_addr *, sa_family_t);
1666 void pfr_update_stats(struct pfr_ktable *, struct pf_addr *, sa_family_t,
1667 u_int64_t, int, int, int);
1668 int pfr_pool_get(struct pfr_ktable *, int *, struct pf_addr *,
1669 struct pf_addr **, struct pf_addr **, sa_family_t);
1670 void pfr_dynaddr_update(struct pfr_ktable *, struct pfi_dynaddr *);
1671 struct pfr_ktable *
1672 pfr_attach_table(struct pf_ruleset *, char *);
1673 void pfr_detach_table(struct pfr_ktable *);
1674 int pfr_clr_tables(struct pfr_table *, int *, int);
1675 int pfr_add_tables(struct pfr_table *, int, int *, int);
1676 int pfr_del_tables(struct pfr_table *, int, int *, int);
1677 int pfr_get_tables(struct pfr_table *, struct pfr_table *, int *, int);
1678 int pfr_get_tstats(struct pfr_table *, struct pfr_tstats *, int *, int);
1679 int pfr_clr_tstats(struct pfr_table *, int, int *, int);
1680 int pfr_set_tflags(struct pfr_table *, int, int, int, int *, int *, int);
1681 int pfr_clr_addrs(struct pfr_table *, int *, int);
1682 int pfr_insert_kentry(struct pfr_ktable *, struct pfr_addr *, long);
1683 int pfr_add_addrs(struct pfr_table *, struct pfr_addr *, int, int *,
1684 int);
1685 int pfr_del_addrs(struct pfr_table *, struct pfr_addr *, int, int *,
1686 int);
1687 int pfr_set_addrs(struct pfr_table *, struct pfr_addr *, int, int *,
1688 int *, int *, int *, int, u_int32_t);
1689 int pfr_get_addrs(struct pfr_table *, struct pfr_addr *, int *, int);
1690 int pfr_get_astats(struct pfr_table *, struct pfr_astats *, int *, int);
1691 int pfr_clr_astats(struct pfr_table *, struct pfr_addr *, int, int *,
1692 int);
1693 int pfr_tst_addrs(struct pfr_table *, struct pfr_addr *, int, int *,
1694 int);
1695 int pfr_ina_begin(struct pfr_table *, u_int32_t *, int *, int);
1696 int pfr_ina_rollback(struct pfr_table *, u_int32_t, int *, int);
1697 int pfr_ina_commit(struct pfr_table *, u_int32_t, int *, int *, int);
1698 int pfr_ina_define(struct pfr_table *, struct pfr_addr *, int, int *,
1699 int *, u_int32_t, int);
1700
1701 extern struct pfi_kif *pfi_all;
1702
1703 void pfi_initialize(void);
1704 struct pfi_kif *pfi_kif_get(const char *);
1705 void pfi_kif_ref(struct pfi_kif *, enum pfi_kif_refs);
1706 void pfi_kif_unref(struct pfi_kif *, enum pfi_kif_refs);
1707 int pfi_kif_match(struct pfi_kif *, struct pfi_kif *);
1708 void pfi_attach_ifnet(struct ifnet *);
1709 void pfi_detach_ifnet(struct ifnet *);
1710 void pfi_attach_ifgroup(struct ifg_group *);
1711 void pfi_detach_ifgroup(struct ifg_group *);
1712 void pfi_group_change(const char *);
1713 int pfi_match_addr(struct pfi_dynaddr *, struct pf_addr *,
1714 sa_family_t);
1715 int pfi_dynaddr_setup(struct pf_addr_wrap *, sa_family_t);
1716 void pfi_dynaddr_remove(struct pf_addr_wrap *);
1717 void pfi_dynaddr_copyout(struct pf_addr_wrap *);
1718 void pfi_fill_oldstatus(struct pf_status *);
1719 int pfi_clr_istats(const char *);
1720 int pfi_get_ifaces(const char *, struct pfi_kif *, int *);
1721 int pfi_set_flags(const char *, int);
1722 int pfi_clear_flags(const char *, int);
1723
1724 u_int16_t pf_tagname2tag(char *);
1725 void pf_tag2tagname(u_int16_t, char *);
1726 void pf_tag_ref(u_int16_t);
1727 void pf_tag_unref(u_int16_t);
1728 int pf_tag_packet(struct mbuf *, int, int);
1729 u_int32_t pf_qname2qid(char *);
1730 void pf_qid2qname(u_int32_t, char *);
1731 void pf_qid_unref(u_int32_t);
1732
1733 extern struct pf_status pf_status;
1734 extern struct pool pf_frent_pl, pf_frag_pl;
1735 #ifdef __NetBSD__
1736 extern krwlock_t pf_consistency_lock;
1737 #else
1738 extern struct rwlock pf_consistency_lock;
1739 #endif /* !__NetBSD__ */
1740
1741 struct pf_pool_limit {
1742 void *pp;
1743 unsigned limit;
1744 };
1745 extern struct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX];
1746
1747 /*
1748 * misc compatibility definitions
1749 */
1750 #if !defined(PRIu32)
1751 #define PRIu32 "u" /* XXX */
1752 #endif
1753
1754 #if !defined(NO_PID)
1755 #define NO_PID (PID_MAX + 1)
1756 #endif
1757
1758 #if defined(__NetBSD__)
1759 /* rwlock compatibility definitions */
1760 #define rw_enter_write(a) rw_enter((a), (RW_WRITER))
1761 #define rw_exit_write(a) rw_exit((a))
1762 #define rw_enter_read(a) rw_enter((a), (RW_READER))
1763 #define rw_exit_read(a) rw_exit((a))
1764 #endif /* __NetBSD__ */
1765
1766 #endif /* _KERNEL */
1767
1768 extern struct pf_anchor_global pf_anchors;
1769 extern struct pf_anchor pf_main_anchor;
1770 #define pf_main_ruleset pf_main_anchor.ruleset
1771
1772 /* these ruleset functions can be linked into userland programs (pfctl) */
1773 int pf_get_ruleset_number(u_int8_t);
1774 void pf_init_ruleset(struct pf_ruleset *);
1775 int pf_anchor_setup(struct pf_rule *,
1776 const struct pf_ruleset *, const char *);
1777 int pf_anchor_copyout(const struct pf_ruleset *,
1778 const struct pf_rule *, struct pfioc_rule *);
1779 void pf_anchor_remove(struct pf_rule *);
1780 void pf_remove_if_empty_ruleset(struct pf_ruleset *);
1781 struct pf_anchor *pf_find_anchor(const char *);
1782 struct pf_ruleset *pf_find_ruleset(const char *);
1783 struct pf_ruleset *pf_find_or_create_ruleset(const char *);
1784 void pf_rs_initialize(void);
1785
1786 #ifdef _KERNEL
1787 int pf_anchor_copyout(const struct pf_ruleset *,
1788 const struct pf_rule *, struct pfioc_rule *);
1789 void pf_anchor_remove(struct pf_rule *);
1790
1791 #endif /* _KERNEL */
1792
1793 /* The fingerprint functions can be linked into userland programs (tcpdump) */
1794 int pf_osfp_add(struct pf_osfp_ioctl *);
1795 #ifdef _KERNEL
1796 struct pf_osfp_enlist *
1797 pf_osfp_fingerprint(struct pf_pdesc *, struct mbuf *, int,
1798 const struct tcphdr *);
1799 #endif /* _KERNEL */
1800 struct pf_osfp_enlist *
1801 pf_osfp_fingerprint_hdr(const struct ip *, const struct ip6_hdr *,
1802 const struct tcphdr *);
1803 void pf_osfp_flush(void);
1804 int pf_osfp_get(struct pf_osfp_ioctl *);
1805 void pf_osfp_initialize(void);
1806 int pf_osfp_match(struct pf_osfp_enlist *, pf_osfp_t);
1807 struct pf_os_fingerprint *
1808 pf_osfp_validate(void);
1809
1810
1811 #endif /* _NET_PFVAR_H_ */
NetBSD on the FriendlyARM MINI2440