1 /*
2 * Copyright (C) 1993-2001, 2003 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * @(#)ip_fil.h 1.35 6/5/96
7 * $Id: ip_fil.h,v 2.170.2.22 2005/07/16 05:55:35 darrenr Exp $
8 *
9 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
10 *
11 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
12 */
13
14 #ifndef __IP_FIL_H__
15 #define __IP_FIL_H__
16
17 #include "netinet/ip_compat.h"
18 #include <sys/zone.h>
19
20 #ifndef SOLARIS
21 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
22 #endif
23
24 #ifndef __P
25 # ifdef __STDC__
26 # define __P(x) x
27 # else
28 # define __P(x) ()
29 # endif
30 #endif
31
32 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51)
33 # define SIOCADAFR _IOW('r', 60, struct ipfobj)
34 # define SIOCRMAFR _IOW('r', 61, struct ipfobj)
35 # define SIOCSETFF _IOW('r', 62, u_int)
36 # define SIOCGETFF _IOR('r', 63, u_int)
37 # define SIOCGETFS _IOWR('r', 64, struct ipfobj)
38 # define SIOCIPFFL _IOWR('r', 65, int)
39 # define SIOCIPFFB _IOR('r', 66, int)
40 # define SIOCADIFR _IOW('r', 67, struct ipfobj)
41 # define SIOCRMIFR _IOW('r', 68, struct ipfobj)
42 # define SIOCSWAPA _IOR('r', 69, u_int)
43 # define SIOCINAFR _IOW('r', 70, struct ipfobj)
44 # define SIOCINIFR _IOW('r', 71, struct ipfobj)
45 # define SIOCFRENB _IOW('r', 72, u_int)
46 # define SIOCFRSYN _IOW('r', 73, u_int)
47 # define SIOCFRZST _IOWR('r', 74, struct ipfobj)
48 # define SIOCZRLST _IOWR('r', 75, struct ipfobj)
49 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj)
50 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj)
51 # define SIOCATHST _IOWR('r', 78, struct ipfobj)
52 # define SIOCSTLCK _IOWR('r', 79, u_int)
53 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj)
54 # define SIOCSTGET _IOWR('r', 81, struct ipfobj)
55 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj)
56 # define SIOCGFRST _IOWR('r', 83, struct ipfobj)
57 # define SIOCSETLG _IOWR('r', 84, int)
58 # define SIOCGETLG _IOWR('r', 85, int)
59 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve)
60 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj)
61 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj)
62 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj)
63 # define SIOCIPFL6 _IOWR('r', 90, int)
64 # define SIOCIPFLP _IOWR('r', 91, int)
65 # define SIOCIPFITER _IOWR('r', 92, struct ipfobj)
66 # define SIOCGENITER _IOWR('r', 93, struct ipfobj)
67 # define SIOCGTABL _IOWR('r', 94, struct ipfobj)
68 # define SIOCIPFDELTOK _IOWR('r', 95, int)
69 # define SIOCLOOKUPITER _IOWR('r', 96, struct ipfobj)
70 #else
71 # define SIOCADAFR _IOW(r, 60, struct ipfobj)
72 # define SIOCRMAFR _IOW(r, 61, struct ipfobj)
73 # define SIOCSETFF _IOW(r, 62, u_int)
74 # define SIOCGETFF _IOR(r, 63, u_int)
75 # define SIOCGETFS _IOWR(r, 64, struct ipfobj)
76 # define SIOCIPFFL _IOWR(r, 65, int)
77 # define SIOCIPFFB _IOR(r, 66, int)
78 # define SIOCADIFR _IOW(r, 67, struct ipfobj)
79 # define SIOCRMIFR _IOW(r, 68, struct ipfobj)
80 # define SIOCSWAPA _IOR(r, 69, u_int)
81 # define SIOCINAFR _IOW(r, 70, struct ipfobj)
82 # define SIOCINIFR _IOW(r, 71, struct ipfobj)
83 # define SIOCFRENB _IOW(r, 72, u_int)
84 # define SIOCFRSYN _IOW(r, 73, u_int)
85 # define SIOCFRZST _IOWR(r, 74, struct ipfobj)
86 # define SIOCZRLST _IOWR(r, 75, struct ipfobj)
87 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj)
88 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj)
89 # define SIOCATHST _IOWR(r, 78, struct ipfobj)
90 # define SIOCSTLCK _IOWR(r, 79, u_int)
91 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj)
92 # define SIOCSTGET _IOWR(r, 81, struct ipfobj)
93 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj)
94 # define SIOCGFRST _IOWR(r, 83, struct ipfobj)
95 # define SIOCSETLG _IOWR(r, 84, int)
96 # define SIOCGETLG _IOWR(r, 85, int)
97 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve)
98 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj)
99 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj)
100 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj)
101 # define SIOCIPFL6 _IOWR(r, 90, int)
102 # define SIOCIPFLP _IOWR(r, 91, int)
103 # define SIOCIPFITER _IOWR(r, 92, struct ipfobj)
104 # define SIOCGENITER _IOWR(r, 93, struct ipfobj)
105 # define SIOCGTABL _IOWR(r, 94, struct ipfobj)
106 # define SIOCIPFDELTOK _IOWR(r, 95, int)
107 # define SIOCLOOKUPITER _IOWR(r, 96, struct ipfobj)
108 #endif
109 #define SIOCADDFR SIOCADAFR
110 #define SIOCDELFR SIOCRMAFR
111 #define SIOCINSFR SIOCINAFR
112 # define SIOCIPFZONESET _IOWR('r', 97, struct ipfzoneobj)
113
114 /*
115 * What type of table is getting flushed?
116 */
117
118 #define NAT_FLUSH 1
119 #define STATE_FLUSH 2
120
121 /*
122 * What table flush options are available?
123 */
124
125 #define FLUSH_LIST 0
126 #define FLUSH_TABLE_ALL 1 /* Flush entire table */
127 #define FLUSH_TABLE_CLOSING 2 /* Flush "closing" entries" */
128 #define FLUSH_TABLE_EXTRA 3 /* Targetted flush: almost closed, long idle */
129
130 #define VALID_TABLE_FLUSH_OPT(x) ((x) >= 1 && (x) <= 3)
131
132 /*
133 * Define the default hi and lo watermarks used when flushing the
134 * tables. The values represent percent full of respective tables.
135 */
136
137 #define NAT_FLUSH_HI 95
138 #define NAT_FLUSH_LO 75
139
140 #define ST_FLUSH_HI 95
141 #define ST_FLUSH_LO 75
142
143 /*
144 * How full are the tables?
145 */
146
147 #define NAT_TAB_WATER_LEVEL(x) ((x)->ifs_nat_stats.ns_inuse * 100 \
148 / (x)->ifs_ipf_nattable_max)
149
150 #define ST_TAB_WATER_LEVEL(x) ((x)->ifs_ips_num * 100 \
151 / (x)->ifs_fr_statemax)
152
153 struct ipscan;
154 struct ifnet;
155
156 typedef struct ipf_stack ipf_stack_t;
157 typedef struct fr_info fr_info_t;
158
159 typedef int (* lookupfunc_t) __P((void *, int, void *, fr_info_t *, ipf_stack_t *));
160
161 /*
162 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well
163 * as other types of objects, depending on its qualifier.
164 */
165 #ifdef USE_INET6
166 typedef union i6addr {
167 u_32_t i6[4];
168 struct in_addr in4;
169 struct in6_addr in6;
170 void *vptr[2];
171 lookupfunc_t lptr[2];
172 } i6addr_t;
173 #define in6_addr8 in6.s6_addr
174 #else
175 typedef union i6addr {
176 u_32_t i6[4];
177 struct in_addr in4;
178 void *vptr[2];
179 lookupfunc_t lptr[2];
180 } i6addr_t;
181 #endif
182
183 #define in4_addr in4.s_addr
184 #define iplookupnum i6[0]
185 #define iplookuptype i6[1]
186 /*
187 * NOTE: These DO overlap the above on 64bit systems and this IS recognised.
188 */
189 #define iplookupptr vptr[0]
190 #define iplookupfunc lptr[1]
191
192 #define I60(x) (((i6addr_t *)(x))->i6[0])
193 #define I61(x) (((i6addr_t *)(x))->i6[1])
194 #define I62(x) (((i6addr_t *)(x))->i6[2])
195 #define I63(x) (((i6addr_t *)(x))->i6[3])
196 #define HI60(x) ntohl(((i6addr_t *)(x))->i6[0])
197 #define HI61(x) ntohl(((i6addr_t *)(x))->i6[1])
198 #define HI62(x) ntohl(((i6addr_t *)(x))->i6[2])
199 #define HI63(x) ntohl(((i6addr_t *)(x))->i6[3])
200
201 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \
202 (I61(a) == I61(b)) && (I60(a) == I60(b)))
203 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \
204 (I61(a) != I61(b)) || (I60(a) != I60(b)))
205 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0)
206 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0)
207 #define IP6_ISONES(a) ((I63(a) == 0xffffffff) && (I62(a) == 0xffffffff) && \
208 (I61(a) == 0xffffffff) && (I60(a) == 0xffffffff))
209 #define IP6_GT(a,b) (ntohl(HI60(a)) > ntohl(HI60(b)) || \
210 (HI60(a) == HI60(b) && \
211 (ntohl(HI61(a)) > ntohl(HI61(b)) || \
212 (HI61(a) == HI61(b) && \
213 (ntohl(HI62(a)) > ntohl(HI62(b)) || \
214 (HI62(a) == HI62(b) && \
215 ntohl(HI63(a)) > ntohl(HI63(b))))))))
216 #define IP6_LT(a,b) (ntohl(HI60(a)) < ntohl(HI60(b)) || \
217 (HI60(a) == HI60(b) && \
218 (ntohl(HI61(a)) < ntohl(HI61(b)) || \
219 (HI61(a) == HI61(b) && \
220 (ntohl(HI62(a)) < ntohl(HI62(b)) || \
221 (HI62(a) == HI62(b) && \
222 ntohl(HI63(a)) < ntohl(HI63(b))))))))
223 #define NLADD(n,x) htonl(ntohl(n) + (x))
224 #define IP6_INC(a) \
225 { i6addr_t *_i6 = (i6addr_t *)(a); \
226 _i6->i6[3] = NLADD(_i6->i6[3], 1); \
227 if (_i6->i6[3] == 0) { \
228 _i6->i6[2] = NLADD(_i6->i6[2], 1); \
229 if (_i6->i6[2] == 0) { \
230 _i6->i6[1] = NLADD(_i6->i6[1], 1); \
231 if (_i6->i6[1] == 0) { \
232 _i6->i6[0] = NLADD(_i6->i6[0], 1); \
233 } \
234 } \
235 } \
236 }
237 #define IP6_ADD(a,x,d) \
238 { i6addr_t *_s = (i6addr_t *)(a); \
239 i6addr_t *_d = (i6addr_t *)(d); \
240 _d->i6[3] = NLADD(_s->i6[3], x); \
241 if (ntohl(_d->i6[3]) < ntohl(_s->i6[3])) { \
242 _d->i6[2] = NLADD(_d->i6[2], 1); \
243 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \
244 _d->i6[1] = NLADD(_d->i6[1], 1); \
245 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \
246 _d->i6[0] = NLADD(_d->i6[0], 1); \
247 } \
248 } \
249 } \
250 }
251 #define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \
252 i6addr_t *_s2 = (i6addr_t *)(b); \
253 i6addr_t *_d = (i6addr_t *)(d); \
254 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \
255 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \
256 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \
257 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \
258 }
259 #define IP6_MASKEQ(a,m,b) \
260 (((I60(a) & I60(m)) == I60(b)) && \
261 ((I61(a) & I61(m)) == I61(b)) && \
262 ((I62(a) & I62(m)) == I62(b)) && \
263 ((I63(a) & I63(m)) == I63(b)))
264 #define IP6_MASKNEQ(a,m,b) \
265 (((I60(a) & I60(m)) != I60(b)) || \
266 ((I61(a) & I61(m)) != I61(b)) || \
267 ((I62(a) & I62(m)) != I62(b)) || \
268 ((I63(a) & I63(m)) != I63(b)))
269 #define IP6_MERGE(a,b,c) \
270 { i6addr_t *_d, *_s1, *_s2; \
271 _d = (i6addr_t *)(a); \
272 _s1 = (i6addr_t *)(b); \
273 _s2 = (i6addr_t *)(c); \
274 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \
275 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \
276 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \
277 _d->i6[3] |= _s1->i6[3] & ~_s2->i6[3]; \
278 }
279
280
281 typedef struct fr_ip {
282 u_32_t fi_v:4; /* IP version */
283 u_32_t fi_xx:4; /* spare */
284 u_32_t fi_tos:8; /* IP packet TOS */
285 u_32_t fi_ttl:8; /* IP packet TTL */
286 u_32_t fi_p:8; /* IP packet protocol */
287 u_32_t fi_optmsk; /* bitmask composed from IP options */
288 i6addr_t fi_src; /* source address from packet */
289 i6addr_t fi_dst; /* destination address from packet */
290 u_short fi_secmsk; /* bitmask composed from IP security options */
291 u_short fi_auth; /* authentication code from IP sec. options */
292 u_32_t fi_flx; /* packet flags */
293 u_32_t fi_tcpmsk; /* TCP options set/reset */
294 u_32_t fi_res1; /* RESERVED */
295 } fr_ip_t;
296
297 /*
298 * For use in fi_flx
299 */
300 #define FI_TCPUDP 0x0001 /* TCP/UCP implied comparison*/
301 #define FI_OPTIONS 0x0002
302 #define FI_FRAG 0x0004
303 #define FI_SHORT 0x0008
304 #define FI_NATED 0x0010
305 #define FI_MULTICAST 0x0020
306 #define FI_BROADCAST 0x0040
307 #define FI_MBCAST 0x0080
308 #define FI_STATE 0x0100
309 #define FI_BADNAT 0x0200
310 #define FI_BAD 0x0400
311 #define FI_OOW 0x0800 /* Out of state window, else match */
312 #define FI_ICMPERR 0x1000
313 #define FI_FRAGBODY 0x2000
314 #define FI_BADSRC 0x4000
315 #define FI_LOWTTL 0x8000
316 #define FI_CMP 0xcf03 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL,broadcast */
317 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */
318 #define FI_WITH 0xeffe /* Not FI_TCPUDP */
319 #define FI_V6EXTHDR 0x10000
320 #define FI_COALESCE 0x20000
321 #define FI_ICMPQUERY 0x40000
322 #define FI_NEWNAT 0x80000
323 #define FI_MOREFRAG 0x100000
324 #define FI_NEG_OOW 0x10000000 /* packet underflows TCP window */
325 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */
326 #define FI_DONTCACHE 0x40000000 /* don't cache the result */
327 #define FI_IGNORE 0x80000000
328
329 #define fi_saddr fi_src.in4.s_addr
330 #define fi_daddr fi_dst.in4.s_addr
331 #define fi_srcnum fi_src.iplookupnum
332 #define fi_dstnum fi_dst.iplookupnum
333 #define fi_srctype fi_src.iplookuptype
334 #define fi_dsttype fi_dst.iplookuptype
335 #define fi_srcptr fi_src.iplookupptr
336 #define fi_dstptr fi_dst.iplookupptr
337 #define fi_srcfunc fi_src.iplookupfunc
338 #define fi_dstfunc fi_dst.iplookupfunc
339
340
341 /*
342 * These are both used by the state and NAT code to indicate that one port or
343 * the other should be treated as a wildcard.
344 * NOTE: When updating, check bit masks in ip_state.h and update there too.
345 */
346 #define SI_W_SPORT 0x00000100
347 #define SI_W_DPORT 0x00000200
348 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT)
349 #define SI_W_SADDR 0x00000400
350 #define SI_W_DADDR 0x00000800
351 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR)
352 #define SI_NEWFR 0x00001000
353 #define SI_CLONE 0x00002000
354 #define SI_CLONED 0x00004000
355
356
357
358
359 struct fr_info {
360 void *fin_ifp; /* interface packet is `on' */
361 fr_ip_t fin_fi; /* IP Packet summary */
362 union {
363 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */
364 u_32_t fid_32;
365 } fin_dat;
366 int fin_out; /* in or out ? 1 == out, 0 == in */
367 int fin_rev; /* state only: 1 = reverse */
368 u_short fin_hlen; /* length of IP header in bytes */
369 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */
370 u_char fin_icode; /* ICMP error to return */
371 u_32_t fin_rule; /* rule # last matched */
372 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */
373 struct frentry *fin_fr; /* last matching rule */
374 void *fin_dp; /* start of data past IP header */
375 int fin_dlen; /* length of data portion of packet */
376 int fin_plen;
377 int fin_ipoff; /* # bytes from buffer start to hdr */
378 u_32_t fin_id; /* IP packet id field */
379 u_short fin_off;
380 int fin_depth; /* Group nesting depth */
381 int fin_error; /* Error code to return */
382 u_int fin_pktnum;
383 void *fin_nattag;
384 union {
385 ip_t *fip_ip;
386 #ifdef USE_INET6
387 ip6_t *fip_ip6;
388 #endif
389 } fin_ipu;
390 mb_t **fin_mp; /* pointer to pointer to mbuf */
391 mb_t *fin_m; /* pointer to mbuf */
392 #ifdef MENTAT
393 mb_t *fin_qfm; /* pointer to mblk where pkt starts */
394 void *fin_qpi;
395 ipf_stack_t *fin_ifs;
396 #endif
397 #ifdef __sgi
398 void *fin_hbuf;
399 #endif
400 };
401
402 #define fin_ip fin_ipu.fip_ip
403 #define fin_ip6 fin_ipu.fip_ip6
404 #define fin_v fin_fi.fi_v
405 #define fin_p fin_fi.fi_p
406 #define fin_flx fin_fi.fi_flx
407 #define fin_optmsk fin_fi.fi_optmsk
408 #define fin_secmsk fin_fi.fi_secmsk
409 #define fin_auth fin_fi.fi_auth
410 #define fin_src fin_fi.fi_src.in4
411 #define fin_saddr fin_fi.fi_saddr
412 #define fin_dst fin_fi.fi_dst.in4
413 #define fin_daddr fin_fi.fi_daddr
414 #define fin_data fin_dat.fid_16
415 #define fin_sport fin_dat.fid_16[0]
416 #define fin_dport fin_dat.fid_16[1]
417 #define fin_ports fin_dat.fid_32
418
419 #ifdef USE_INET6
420 # define fin_src6 fin_fi.fi_src
421 # define fin_dst6 fin_fi.fi_dst
422 # define fin_dstip6 fin_fi.fi_dst.in6
423 # define fin_srcip6 fin_fi.fi_src.in6
424 #endif
425
426 #define IPF_IN 0
427 #define IPF_OUT 1
428
429 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *));
430 typedef int (*ipfuncinit_t) __P((struct frentry *,
431 ipf_stack_t *));
432
433 typedef struct ipfunc_resolve {
434 char ipfu_name[32];
435 ipfunc_t ipfu_addr;
436 ipfuncinit_t ipfu_init;
437 } ipfunc_resolve_t;
438
439 /*
440 * Size for compares on fr_info structures
441 */
442 #define FI_CSIZE offsetof(fr_info_t, fin_icode)
443 #define FI_LCSIZE offsetof(fr_info_t, fin_dp)
444
445 /*
446 * Size for copying cache fr_info structure
447 */
448 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp)
449
450 /*
451 * Structure for holding IPFilter's tag information
452 */
453 #define IPFTAG_LEN 16
454 typedef struct {
455 union {
456 u_32_t iptu_num[4];
457 char iptu_tag[IPFTAG_LEN];
458 } ipt_un;
459 int ipt_not;
460 } ipftag_t;
461
462 #define ipt_tag ipt_un.iptu_tag
463 #define ipt_num ipt_un.iptu_num
464
465
466 /*
467 * This structure is used to hold information about the next hop for where
468 * to forward a packet.
469 */
470 typedef struct frdest {
471 void *fd_ifp;
472 i6addr_t fd_ip6;
473 char fd_ifname[LIFNAMSIZ];
474 } frdest_t;
475
476 #define fd_ip fd_ip6.in4
477
478
479 /*
480 * This structure holds information about a port comparison.
481 */
482 typedef struct frpcmp {
483 int frp_cmp; /* data for port comparisons */
484 u_short frp_port; /* top port for <> and >< */
485 u_short frp_top; /* top port for <> and >< */
486 } frpcmp_t;
487
488 #define FR_NONE 0
489 #define FR_EQUAL 1
490 #define FR_NEQUAL 2
491 #define FR_LESST 3
492 #define FR_GREATERT 4
493 #define FR_LESSTE 5
494 #define FR_GREATERTE 6
495 #define FR_OUTRANGE 7
496 #define FR_INRANGE 8
497 #define FR_INCRANGE 9
498
499 /*
500 * Structure containing all the relevant TCP things that can be checked in
501 * a filter rule.
502 */
503 typedef struct frtuc {
504 u_char ftu_tcpfm; /* tcp flags mask */
505 u_char ftu_tcpf; /* tcp flags */
506 frpcmp_t ftu_src;
507 frpcmp_t ftu_dst;
508 } frtuc_t;
509
510 #define ftu_scmp ftu_src.frp_cmp
511 #define ftu_dcmp ftu_dst.frp_cmp
512 #define ftu_sport ftu_src.frp_port
513 #define ftu_dport ftu_dst.frp_port
514 #define ftu_stop ftu_src.frp_top
515 #define ftu_dtop ftu_dst.frp_top
516
517 #define FR_TCPFMAX 0x3f
518
519 /*
520 * This structure makes up what is considered to be the IPFilter specific
521 * matching components of a filter rule, as opposed to the data structures
522 * used to define the result which are in frentry_t and not here.
523 */
524 typedef struct fripf {
525 fr_ip_t fri_ip;
526 fr_ip_t fri_mip; /* mask structure */
527
528 u_short fri_icmpm; /* data for ICMP packets (mask) */
529 u_short fri_icmp;
530
531 frtuc_t fri_tuc;
532 int fri_satype; /* addres type */
533 int fri_datype; /* addres type */
534 int fri_sifpidx; /* doing dynamic addressing */
535 int fri_difpidx; /* index into fr_ifps[] to use when */
536 } fripf_t;
537
538 #define fri_dstnum fri_ip.fi_dstnum
539 #define fri_srcnum fri_mip.fi_srcnum
540 #define fri_dstptr fri_ip.fi_dstptr
541 #define fri_srcptr fri_mip.fi_srcptr
542
543 #define FRI_NORMAL 0 /* Normal address */
544 #define FRI_DYNAMIC 1 /* dynamic address */
545 #define FRI_LOOKUP 2 /* address is a pool # */
546 #define FRI_RANGE 3 /* address/mask is a range */
547 #define FRI_NETWORK 4 /* network address from if */
548 #define FRI_BROADCAST 5 /* broadcast address from if */
549 #define FRI_PEERADDR 6 /* Peer address for P-to-P */
550 #define FRI_NETMASKED 7 /* network address with netmask from if */
551
552
553 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *));
554
555 typedef struct frentry {
556 ipfmutex_t fr_lock;
557 struct frentry *fr_next;
558 struct frentry **fr_grp;
559 struct ipscan *fr_isc;
560 void *fr_ifas[4];
561 void *fr_ptr; /* for use with fr_arg */
562 char *fr_comment; /* text comment for rule */
563 int fr_ref; /* reference count - for grouping */
564 int fr_statecnt; /* state count - for limit rules */
565 /*
566 * These are only incremented when a packet matches this rule and
567 * it is the last match
568 */
569 U_QUAD_T fr_hits;
570 U_QUAD_T fr_bytes;
571
572 /*
573 * For PPS rate limiting
574 */
575 struct timeval fr_lastpkt;
576 int fr_curpps;
577
578 union {
579 void *fru_data;
580 caddr_t fru_caddr;
581 fripf_t *fru_ipf;
582 frentfunc_t fru_func;
583 } fr_dun;
584
585 /*
586 * Fields after this may not change whilst in the kernel.
587 */
588 ipfunc_t fr_func; /* call this function */
589 int fr_dsize;
590 int fr_pps;
591 int fr_statemax; /* max reference count */
592 int fr_flineno; /* line number from conf file */
593 u_32_t fr_type;
594 u_32_t fr_flags; /* per-rule flags && options (see below) */
595 u_32_t fr_logtag; /* user defined log tag # */
596 u_32_t fr_collect; /* collection number */
597 u_int fr_arg; /* misc. numeric arg for rule */
598 u_int fr_loglevel; /* syslog log facility + priority */
599 u_int fr_age[2]; /* non-TCP timeouts */
600 u_char fr_v;
601 u_char fr_icode; /* return ICMP code */
602 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */
603 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */
604 ipftag_t fr_nattag;
605 char fr_ifnames[4][LIFNAMSIZ];
606 char fr_isctag[16];
607 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */
608 frdest_t fr_dif; /* duplicate packet interface */
609 /*
610 * This must be last and will change after loaded into the kernel.
611 */
612 u_int fr_cksum; /* checksum on filter rules for performance */
613 } frentry_t;
614
615 #define fr_caddr fr_dun.fru_caddr
616 #define fr_data fr_dun.fru_data
617 #define fr_dfunc fr_dun.fru_func
618 #define fr_ipf fr_dun.fru_ipf
619 #define fr_ip fr_ipf->fri_ip
620 #define fr_mip fr_ipf->fri_mip
621 #define fr_icmpm fr_ipf->fri_icmpm
622 #define fr_icmp fr_ipf->fri_icmp
623 #define fr_tuc fr_ipf->fri_tuc
624 #define fr_satype fr_ipf->fri_satype
625 #define fr_datype fr_ipf->fri_datype
626 #define fr_sifpidx fr_ipf->fri_sifpidx
627 #define fr_difpidx fr_ipf->fri_difpidx
628 #define fr_proto fr_ip.fi_p
629 #define fr_mproto fr_mip.fi_p
630 #define fr_ttl fr_ip.fi_ttl
631 #define fr_mttl fr_mip.fi_ttl
632 #define fr_tos fr_ip.fi_tos
633 #define fr_mtos fr_mip.fi_tos
634 #define fr_tcpfm fr_tuc.ftu_tcpfm
635 #define fr_tcpf fr_tuc.ftu_tcpf
636 #define fr_scmp fr_tuc.ftu_scmp
637 #define fr_dcmp fr_tuc.ftu_dcmp
638 #define fr_dport fr_tuc.ftu_dport
639 #define fr_sport fr_tuc.ftu_sport
640 #define fr_stop fr_tuc.ftu_stop
641 #define fr_dtop fr_tuc.ftu_dtop
642 #define fr_dst fr_ip.fi_dst.in4
643 #define fr_daddr fr_ip.fi_dst.in4.s_addr
644 #define fr_src fr_ip.fi_src.in4
645 #define fr_saddr fr_ip.fi_src.in4.s_addr
646 #define fr_dmsk fr_mip.fi_dst.in4
647 #define fr_dmask fr_mip.fi_dst.in4.s_addr
648 #define fr_smsk fr_mip.fi_src.in4
649 #define fr_smask fr_mip.fi_src.in4.s_addr
650 #define fr_dstnum fr_ip.fi_dstnum
651 #define fr_srcnum fr_ip.fi_srcnum
652 #define fr_dsttype fr_ip.fi_dsttype
653 #define fr_srctype fr_ip.fi_srctype
654 #define fr_dstptr fr_mip.fi_dstptr
655 #define fr_srcptr fr_mip.fi_srcptr
656 #define fr_dstfunc fr_mip.fi_dstfunc
657 #define fr_srcfunc fr_mip.fi_srcfunc
658 #define fr_optbits fr_ip.fi_optmsk
659 #define fr_optmask fr_mip.fi_optmsk
660 #define fr_secbits fr_ip.fi_secmsk
661 #define fr_secmask fr_mip.fi_secmsk
662 #define fr_authbits fr_ip.fi_auth
663 #define fr_authmask fr_mip.fi_auth
664 #define fr_flx fr_ip.fi_flx
665 #define fr_mflx fr_mip.fi_flx
666 #define fr_ifname fr_ifnames[0]
667 #define fr_oifname fr_ifnames[2]
668 #define fr_ifa fr_ifas[0]
669 #define fr_oifa fr_ifas[2]
670 #define fr_tif fr_tifs[0]
671 #define fr_rif fr_tifs[1]
672
673 #define FR_NOLOGTAG 0
674
675 #define FR_CMPSIZ (sizeof(struct frentry) - \
676 offsetof(struct frentry, fr_func))
677
678 /*
679 * fr_type
680 */
681 #define FR_T_NONE 0
682 #define FR_T_IPF 1 /* IPF structures */
683 #define FR_T_BPFOPC 2 /* BPF opcode */
684 #define FR_T_CALLFUNC 3 /* callout to function in fr_func only */
685 #define FR_T_COMPIPF 4 /* compiled C code */
686 #define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */
687
688 /*
689 * fr_flags
690 */
691 #define FR_CALL 0x00000 /* call rule */
692 #define FR_BLOCK 0x00001 /* do not allow packet to pass */
693 #define FR_PASS 0x00002 /* allow packet to pass */
694 #define FR_AUTH 0x00003 /* use authentication */
695 #define FR_PREAUTH 0x00004 /* require preauthentication */
696 #define FR_ACCOUNT 0x00005 /* Accounting rule */
697 #define FR_SKIP 0x00006 /* skip rule */
698 #define FR_DIVERT 0x00007 /* divert rule */
699 #define FR_CMDMASK 0x0000f
700 #define FR_LOG 0x00010 /* Log */
701 #define FR_LOGB 0x00011 /* Log-fail */
702 #define FR_LOGP 0x00012 /* Log-pass */
703 #define FR_LOGMASK (FR_LOG|FR_CMDMASK)
704 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */
705 #define FR_NOTSRCIP 0x00040
706 #define FR_NOTDSTIP 0x00080
707 #define FR_QUICK 0x00100 /* match & stop processing list */
708 #define FR_KEEPFRAG 0x00200 /* keep fragment information */
709 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */
710 #define FR_FASTROUTE 0x00800 /* bypass normal routing */
711 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */
712 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */
713 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */
714 #define FR_OUTQUE 0x04000 /* outgoing packets */
715 #define FR_INQUE 0x08000 /* ingoing packets */
716 #define FR_LOGBODY 0x10000 /* Log the body */
717 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */
718 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */
719 #define FR_DUP 0x80000 /* duplicate packet */
720 #define FR_FRSTRICT 0x100000 /* strict frag. cache */
721 #define FR_STSTRICT 0x200000 /* strict keep state */
722 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */
723 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */
724 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */
725 #define FR_NOMATCH 0x8000000 /* no match occured */
726 /* 0x10000000 FF_LOGPASS */
727 /* 0x20000000 FF_LOGBLOCK */
728 /* 0x40000000 FF_LOGNOMATCH */
729 /* 0x80000000 FF_BLOCKNONIP */
730 #define FR_COPIED 0x40000000 /* copied from user space */
731 #define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */
732
733 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP)
734 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK)
735 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS)
736 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH)
737 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH)
738 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT)
739 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP)
740 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH)
741 #define FR_INOUT (FR_INQUE|FR_OUTQUE)
742
743 /*
744 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags
745 */
746 #define FF_LOGPASS 0x10000000
747 #define FF_LOGBLOCK 0x20000000
748 #define FF_LOGNOMATCH 0x40000000
749 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH)
750 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */
751
752
753 /*
754 * Structure that passes information on what/how to flush to the kernel.
755 */
756 typedef struct ipfflush {
757 int ipflu_how;
758 int ipflu_arg;
759 } ipfflush_t;
760
761
762 /*
763 *
764 */
765 typedef struct ipfgetctl {
766 u_int ipfg_min; /* min value */
767 u_int ipfg_current; /* current value */
768 u_int ipfg_max; /* max value */
769 u_int ipfg_default; /* default value */
770 u_int ipfg_steps; /* value increments */
771 char ipfg_name[40]; /* tag name for this control */
772 } ipfgetctl_t;
773
774 typedef struct ipfsetctl {
775 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */
776 u_int ipfs_value; /* min value */
777 char ipfs_name[40]; /* tag name for this control */
778 } ipfsetctl_t;
779
780
781 /*
782 * Some of the statistics below are in their own counters, but most are kept
783 * in this single structure so that they can all easily be collected and
784 * copied back as required.
785 *
786 * NOTE: when changing, keep in sync with kstats (below).
787 */
788 typedef struct filterstats {
789 u_long fr_pass; /* packets allowed */
790 u_long fr_block; /* packets denied */
791 u_long fr_nom; /* packets which don't match any rule */
792 u_long fr_short; /* packets which are short */
793 u_long fr_ppkl; /* packets allowed and logged */
794 u_long fr_bpkl; /* packets denied and logged */
795 u_long fr_npkl; /* packets unmatched and logged */
796 u_long fr_pkl; /* packets logged */
797 u_long fr_skip; /* packets to be logged but buffer full */
798 u_long fr_ret; /* packets for which a return is sent */
799 u_long fr_acct; /* packets for which counting was performed */
800 u_long fr_bnfr; /* bad attempts to allocate fragment state */
801 u_long fr_nfr; /* new fragment state kept */
802 u_long fr_cfr; /* add new fragment state but complete pkt */
803 u_long fr_bads; /* bad attempts to allocate packet state */
804 u_long fr_ads; /* new packet state kept */
805 u_long fr_chit; /* cached hit */
806 u_long fr_tcpbad; /* TCP checksum check failures */
807 u_long fr_pull[2]; /* good and bad pullup attempts */
808 u_long fr_badsrc; /* source received doesn't match route */
809 u_long fr_badttl; /* TTL in packet doesn't reach minimum */
810 u_long fr_bad; /* bad IP packets to the filter */
811 u_long fr_ipv6; /* IPv6 packets in/out */
812 u_long fr_ppshit; /* dropped because of pps ceiling */
813 u_long fr_ipud; /* IP id update failures */
814 } filterstats_t;
815
816 /*
817 * kstat "copy" of the above - keep in sync!
818 * also keep in sync with initialisation code in solaris.c, ipf_kstat_init().
819 */
820 typedef struct filter_kstats {
821 kstat_named_t fks_pass; /* see above for comments */
822 kstat_named_t fks_block;
823 kstat_named_t fks_nom;
824 kstat_named_t fks_short;
825 kstat_named_t fks_ppkl;
826 kstat_named_t fks_bpkl;
827 kstat_named_t fks_npkl;
828 kstat_named_t fks_pkl;
829 kstat_named_t fks_skip;
830 kstat_named_t fks_ret;
831 kstat_named_t fks_acct;
832 kstat_named_t fks_bnfr;
833 kstat_named_t fks_nfr;
834 kstat_named_t fks_cfr;
835 kstat_named_t fks_bads;
836 kstat_named_t fks_ads;
837 kstat_named_t fks_chit;
838 kstat_named_t fks_tcpbad;
839 kstat_named_t fks_pull[2];
840 kstat_named_t fks_badsrc;
841 kstat_named_t fks_badttl;
842 kstat_named_t fks_bad;
843 kstat_named_t fks_ipv6;
844 kstat_named_t fks_ppshit;
845 kstat_named_t fks_ipud;
846 } filter_kstats_t;
847
848 /*
849 * Log structure. Each packet header logged is prepended by one of these.
850 * Following this in the log records read from the device will be an ipflog
851 * structure which is then followed by any packet data.
852 */
853 typedef struct iplog {
854 u_32_t ipl_magic;
855 u_int ipl_count;
856 struct timeval ipl_time;
857 size_t ipl_dsize;
858 struct iplog *ipl_next;
859 } iplog_t;
860
861 #define ipl_sec ipl_time.tv_sec
862 #define ipl_usec ipl_time.tv_usec
863
864 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */
865 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */
866 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */
867 #define IPLOG_SIZE sizeof(iplog_t)
868
869 typedef struct ipflog {
870 #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
871 (defined(OpenBSD) && (OpenBSD >= 199603))
872 #else
873 u_int fl_unit;
874 #endif
875 u_32_t fl_rule;
876 u_32_t fl_flags;
877 u_32_t fl_lflags;
878 u_32_t fl_logtag;
879 ipftag_t fl_nattag;
880 u_short fl_plen; /* extra data after hlen */
881 u_short fl_loglevel; /* syslog log level */
882 char fl_group[FR_GROUPLEN];
883 u_char fl_hlen; /* length of IP headers saved */
884 u_char fl_dir;
885 u_char fl_xxx[2]; /* pad */
886 char fl_ifname[LIFNAMSIZ];
887 } ipflog_t;
888
889 #ifndef IPF_LOGGING
890 # define IPF_LOGGING 0
891 #endif
892 #ifndef IPF_DEFAULT_PASS
893 # define IPF_DEFAULT_PASS FR_PASS
894 #endif
895
896 #define DEFAULT_IPFLOGSIZE 8192
897 #ifndef IPFILTER_LOGSIZE
898 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE
899 #else
900 # if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE
901 # error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE
902 # endif
903 #endif
904
905 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */
906
907 /*
908 * Device filenames for reading log information. Use ipf on Solaris2 because
909 * ipl is already a name used by something else.
910 */
911 #ifndef IPL_NAME
912 # if SOLARIS
913 # define IPL_NAME "/dev/ipf"
914 # else
915 # define IPL_NAME "/dev/ipl"
916 # endif
917 #endif
918 /*
919 * Pathnames for various IP Filter control devices. Used by LKM
920 * and userland, so defined here.
921 */
922 #define IPNAT_NAME "/dev/ipnat"
923 #define IPSTATE_NAME "/dev/ipstate"
924 #define IPAUTH_NAME "/dev/ipauth"
925 #define IPSYNC_NAME "/dev/ipsync"
926 #define IPSCAN_NAME "/dev/ipscan"
927 #define IPLOOKUP_NAME "/dev/iplookup"
928
929 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */
930 #define IPL_LOGNAT 1
931 #define IPL_LOGSTATE 2
932 #define IPL_LOGAUTH 3
933 #define IPL_LOGSYNC 4
934 #define IPL_LOGSCAN 5
935 #define IPL_LOGLOOKUP 6
936 #define IPL_LOGCOUNT 7
937 #define IPL_LOGMAX 7
938 #define IPL_LOGSIZE (IPL_LOGMAX + 1)
939 #define IPL_LOGALL -1
940 #define IPL_LOGNONE -2
941
942 /*
943 * For SIOCGETFS
944 */
945 typedef struct friostat {
946 struct filterstats f_st[2];
947 struct frentry *f_ipf[2][2];
948 struct frentry *f_acct[2][2];
949 struct frentry *f_ipf6[2][2];
950 struct frentry *f_acct6[2][2];
951 struct frentry *f_auth;
952 struct frgroup *f_groups[IPL_LOGSIZE][2];
953 u_long f_froute[2];
954 u_long f_ticks;
955 int f_locks[IPL_LOGMAX];
956 size_t f_kmutex_sz;
957 size_t f_krwlock_sz;
958 int f_defpass; /* default pass - from fr_pass */
959 int f_active; /* 1 or 0 - active rule set */
960 int f_running; /* 1 if running, else 0 */
961 int f_logging; /* 1 if enabled, else 0 */
962 int f_features;
963 char f_version[32]; /* version string */
964 } friostat_t;
965
966 #define f_fin f_ipf[0]
967 #define f_fin6 f_ipf6[0]
968 #define f_fout f_ipf[1]
969 #define f_fout6 f_ipf6[1]
970 #define f_acctin f_acct[0]
971 #define f_acctin6 f_acct6[0]
972 #define f_acctout f_acct[1]
973 #define f_acctout6 f_acct6[1]
974
975 #define IPF_FEAT_LKM 0x001
976 #define IPF_FEAT_LOG 0x002
977 #define IPF_FEAT_LOOKUP 0x004
978 #define IPF_FEAT_BPF 0x008
979 #define IPF_FEAT_COMPILED 0x010
980 #define IPF_FEAT_CKSUM 0x020
981 #define IPF_FEAT_SYNC 0x040
982 #define IPF_FEAT_SCAN 0x080
983 #define IPF_FEAT_IPV6 0x100
984
985 typedef struct optlist {
986 u_short ol_val;
987 int ol_bit;
988 } optlist_t;
989
990
991 /*
992 * Group list structure.
993 */
994 typedef struct frgroup {
995 struct frgroup *fg_next;
996 struct frentry *fg_head;
997 struct frentry *fg_start;
998 u_32_t fg_flags;
999 int fg_ref;
1000 char fg_name[FR_GROUPLEN];
1001 } frgroup_t;
1002
1003 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name)
1004
1005
1006 /*
1007 * Used by state and NAT tables
1008 */
1009 typedef struct icmpinfo {
1010 u_short ici_id;
1011 u_short ici_seq;
1012 u_char ici_type;
1013 } icmpinfo_t;
1014
1015 typedef struct udpinfo {
1016 u_short us_sport;
1017 u_short us_dport;
1018 } udpinfo_t;
1019
1020
1021 typedef struct tcpdata {
1022 u_32_t td_end;
1023 u_32_t td_maxend;
1024 u_32_t td_maxwin;
1025 u_32_t td_winscale;
1026 u_32_t td_maxseg;
1027 int td_winflags;
1028 } tcpdata_t;
1029
1030 #define TCP_WSCALE_MAX 14
1031
1032 #define TCP_WSCALE_SEEN 0x00000001
1033 #define TCP_WSCALE_FIRST 0x00000002
1034 #define TCP_SACK_PERMIT 0x00000004
1035
1036
1037 typedef struct tcpinfo {
1038 u_short ts_sport;
1039 u_short ts_dport;
1040 tcpdata_t ts_data[2];
1041 } tcpinfo_t;
1042
1043
1044 /*
1045 * Structures to define a GRE header as seen in a packet.
1046 */
1047 struct grebits {
1048 u_32_t grb_C:1;
1049 u_32_t grb_R:1;
1050 u_32_t grb_K:1;
1051 u_32_t grb_S:1;
1052 u_32_t grb_s:1;
1053 u_32_t grb_recur:1;
1054 u_32_t grb_A:1;
1055 u_32_t grb_flags:3;
1056 u_32_t grb_ver:3;
1057 u_short grb_ptype;
1058 };
1059
1060 typedef struct grehdr {
1061 union {
1062 struct grebits gru_bits;
1063 u_short gru_flags;
1064 } gr_un;
1065 u_short gr_len;
1066 u_short gr_call;
1067 } grehdr_t;
1068
1069 #define gr_flags gr_un.gru_flags
1070 #define gr_bits gr_un.gru_bits
1071 #define gr_ptype gr_bits.grb_ptype
1072 #define gr_C gr_bits.grb_C
1073 #define gr_R gr_bits.grb_R
1074 #define gr_K gr_bits.grb_K
1075 #define gr_S gr_bits.grb_S
1076 #define gr_s gr_bits.grb_s
1077 #define gr_recur gr_bits.grb_recur
1078 #define gr_A gr_bits.grb_A
1079 #define gr_ver gr_bits.grb_ver
1080
1081 /*
1082 * GRE information tracked by "keep state"
1083 */
1084 typedef struct greinfo {
1085 u_short gs_call[2];
1086 u_short gs_flags;
1087 u_short gs_ptype;
1088 } greinfo_t;
1089
1090 #define GRE_REV(x) ((ntohs(x) >> 13) & 7)
1091
1092
1093 /*
1094 * Format of an Authentication header
1095 */
1096 typedef struct authhdr {
1097 u_char ah_next;
1098 u_char ah_plen;
1099 u_short ah_reserved;
1100 u_32_t ah_spi;
1101 u_32_t ah_seq;
1102 /* Following the sequence number field is 0 or more bytes of */
1103 /* authentication data, as specified by ah_plen - RFC 2402. */
1104 } authhdr_t;
1105
1106
1107 /*
1108 * Timeout tail queue list member
1109 */
1110 typedef struct ipftqent {
1111 struct ipftqent **tqe_pnext;
1112 struct ipftqent *tqe_next;
1113 struct ipftq *tqe_ifq;
1114 void *tqe_parent; /* pointer back to NAT/state struct */
1115 u_long tqe_die; /* when this entriy is to die */
1116 u_long tqe_touched;
1117 int tqe_flags;
1118 int tqe_state[2]; /* current state of this entry */
1119 } ipftqent_t;
1120
1121 #define TQE_RULEBASED 0x00000001
1122
1123
1124 /*
1125 * Timeout tail queue head for IPFilter
1126 */
1127 typedef struct ipftq {
1128 ipfmutex_t ifq_lock;
1129 u_int ifq_ttl;
1130 ipftqent_t *ifq_head;
1131 ipftqent_t **ifq_tail;
1132 struct ipftq *ifq_next;
1133 struct ipftq **ifq_pnext;
1134 int ifq_ref;
1135 u_int ifq_flags;
1136 } ipftq_t;
1137
1138 #define IFQF_USER 0x01 /* User defined aging */
1139 #define IFQF_DELETE 0x02 /* Marked for deletion */
1140 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */
1141
1142 #define IPF_HZ_MULT 1
1143 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */
1144 /* checks its timeout queues. */
1145 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE)
1146
1147 /*
1148 * Structure to define address for pool lookups.
1149 */
1150 typedef struct {
1151 u_char adf_len;
1152 sa_family_t adf_family;
1153 i6addr_t adf_addr;
1154 } addrfamily_t;
1155
1156
1157 /*
1158 * Object structure description. For passing through in ioctls.
1159 */
1160 typedef struct ipfobj {
1161 u_32_t ipfo_rev; /* IPFilter version number */
1162 u_32_t ipfo_size; /* size of object at ipfo_ptr */
1163 void *ipfo_ptr; /* pointer to object */
1164 int ipfo_type; /* type of object being pointed to */
1165 int ipfo_offset; /* bytes from ipfo_ptr where to start */
1166 u_char ipfo_xxxpad[32]; /* reserved for future use */
1167 } ipfobj_t;
1168
1169 /*
1170 * ioctl struct for setting what zone further ioctls will act on. ipfz_gz is a
1171 * boolean: set it to 1 to operate on the GZ-controlled stack.
1172 */
1173 typedef struct ipfzoneobj {
1174 u_32_t ipfz_gz; /* GZ stack boolean */
1175 char ipfz_zonename[ZONENAME_MAX]; /* zone to act on */
1176 } ipfzoneobj_t;
1177
1178 #if defined(_KERNEL)
1179 /* Set ipfs_zoneid to this if no zone has been set: */
1180 #define IPFS_ZONE_UNSET -2
1181
1182 typedef struct ipf_devstate {
1183 zoneid_t ipfs_zoneid;
1184 minor_t ipfs_minor;
1185 boolean_t ipfs_gz;
1186 } ipf_devstate_t;
1187 #endif
1188
1189 #define IPFOBJ_FRENTRY 0 /* struct frentry */
1190 #define IPFOBJ_IPFSTAT 1 /* struct friostat */
1191 #define IPFOBJ_IPFINFO 2 /* struct fr_info */
1192 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */
1193 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */
1194 #define IPFOBJ_IPNAT 5 /* struct ipnat */
1195 #define IPFOBJ_NATSTAT 6 /* struct natstat */
1196 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */
1197 #define IPFOBJ_NATSAVE 8 /* struct nat_save */
1198 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */
1199 #define IPFOBJ_IPSTATE 10 /* struct ipstate */
1200 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */
1201 #define IPFOBJ_FRAUTH 12 /* struct frauth */
1202 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */
1203 #define IPFOBJ_NAT 14 /* struct nat */
1204 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */
1205 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */
1206 #define IPFOBJ_GTABLE 17 /* struct ipftable */
1207 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */
1208 #define IPFOBJ_COUNT 19 /* How many #defines are above this? */
1209
1210
1211 typedef union ipftunevalptr {
1212 void *ipftp_void;
1213 u_long *ipftp_long;
1214 u_int *ipftp_int;
1215 u_short *ipftp_short;
1216 u_char *ipftp_char;
1217 } ipftunevalptr_t;
1218
1219 typedef struct ipftuneable {
1220 ipftunevalptr_t ipft_una;
1221 char *ipft_name;
1222 u_long ipft_min;
1223 u_long ipft_max;
1224 int ipft_sz;
1225 int ipft_flags;
1226 struct ipftuneable *ipft_next;
1227 } ipftuneable_t;
1228
1229 #define ipft_addr ipft_una.ipftp_void
1230 #define ipft_plong ipft_una.ipftp_long
1231 #define ipft_pint ipft_una.ipftp_int
1232 #define ipft_pshort ipft_una.ipftp_short
1233 #define ipft_pchar ipft_una.ipftp_char
1234
1235 #define IPFT_RDONLY 1 /* read-only */
1236 #define IPFT_WRDISABLED 2 /* write when disabled only */
1237
1238 typedef union ipftuneval {
1239 u_long ipftu_long;
1240 u_int ipftu_int;
1241 u_short ipftu_short;
1242 u_char ipftu_char;
1243 } ipftuneval_t;
1244
1245 typedef struct ipftune {
1246 void *ipft_cookie;
1247 ipftuneval_t ipft_un;
1248 u_long ipft_min;
1249 u_long ipft_max;
1250 int ipft_sz;
1251 int ipft_flags;
1252 char ipft_name[80];
1253 } ipftune_t;
1254
1255 #define ipft_vlong ipft_un.ipftu_long
1256 #define ipft_vint ipft_un.ipftu_int
1257 #define ipft_vshort ipft_un.ipftu_short
1258 #define ipft_vchar ipft_un.ipftu_char
1259
1260 /*
1261 * ipfruleiter is iterator structure used for filter rules.
1262 */
1263 typedef struct ipfruleiter {
1264 int iri_ver;
1265 int iri_inout;
1266 char iri_group[FR_GROUPLEN];
1267 int iri_active;
1268 int iri_nrules;
1269 frentry_t *iri_rule;
1270 } ipfruleiter_t;
1271
1272 /* Values for iri_inout */
1273 #define F_IN 0
1274 #define F_OUT 1
1275 #define F_ACIN 2
1276 #define F_ACOUT 3
1277
1278 /*
1279 * ipfgeniter is generic iterator structure used for nat rules,
1280 * hostmap entries and nat table entries.
1281 */
1282 typedef struct ipfgeniter {
1283 int igi_type; /* type of data we're looking at */
1284 int igi_nitems;
1285 void *igi_data;
1286 } ipfgeniter_t;
1287
1288 #define IPFGENITER_IPF 0
1289 #define IPFGENITER_NAT 1
1290 #define IPFGENITER_IPNAT 2
1291 #define IPFGENITER_FRAG 3
1292 #define IPFGENITER_AUTH 4
1293 #define IPFGENITER_STATE 5
1294 #define IPFGENITER_NATFRAG 6
1295 #define IPFGENITER_HOSTMAP 7
1296 #define IPFGENITER_LOOKUP 8
1297
1298 typedef struct ipftable {
1299 int ita_type;
1300 void *ita_table;
1301 } ipftable_t;
1302
1303 typedef struct ipftoken {
1304 struct ipftoken *ipt_next;
1305 struct ipftoken **ipt_pnext;
1306 void *ipt_ctx;
1307 void *ipt_data;
1308 u_long ipt_die;
1309 int ipt_type;
1310 int ipt_uid;
1311 int ipt_subtype;
1312 int ipt_alive;
1313 } ipftoken_t;
1314
1315
1316 /*
1317 * sync commands
1318 */
1319 #define IPFSYNC_RESYNC 0
1320 #define IPFSYNC_NEWIFP 1
1321 #define IPFSYNC_OLDIFP 2
1322
1323
1324 /*
1325 ** HPUX Port
1326 */
1327 #ifdef __hpux
1328 /* HP-UX locking sequence deadlock detection module lock MAJOR ID */
1329 # define IPF_SMAJ 0 /* temp assignment XXX, not critical */
1330 #endif
1331
1332 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \
1333 (__FreeBSD_version >= 220000)
1334 # define CDEV_MAJOR 79
1335 #endif
1336
1337 /*
1338 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns
1339 * on those hooks. We don't need any special mods in non-IP Filter code
1340 * with this!
1341 */
1342 #if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \
1343 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \
1344 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043))
1345 # if (NetBSD >= 199905)
1346 # define PFIL_HOOKS
1347 # endif
1348 # ifdef PFIL_HOOKS
1349 # define NETBSD_PF
1350 # endif
1351 #endif
1352
1353 #ifndef _KERNEL
1354 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *));
1355 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *));
1356 extern int ipf_log __P((void));
1357 extern struct ifnet *get_unit __P((char *, int, ipf_stack_t *));
1358 extern char *get_ifname __P((struct ifnet *));
1359 # if defined(__NetBSD__) || defined(__OpenBSD__) || \
1360 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000)
1361 extern int frrequest __P((int, u_long, caddr_t, int, int, ipf_stack_t *));
1362 # else
1363 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int));
1364 # endif
1365 extern int iplopen __P((dev_t, int));
1366 extern int iplclose __P((dev_t, int));
1367 extern void m_freem __P((mb_t *));
1368 #else /* #ifndef _KERNEL */
1369 extern phy_if_t get_unit __P((char *, int, ipf_stack_t *));
1370 # if defined(__NetBSD__) && defined(PFIL_HOOKS)
1371 extern void ipfilterattach __P((int));
1372 # endif
1373 extern int ipl_enable __P((void));
1374 extern int ipl_disable __P((void));
1375 # ifdef MENTAT
1376 extern int fr_check __P((struct ip *, int, void *, int, void *,
1377 mblk_t **, ipf_stack_t *));
1378 # if SOLARIS
1379 # if SOLARIS2 >= 7
1380 extern int iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *));
1381 # else
1382 extern int iplioctl __P((dev_t, int, int *, int, cred_t *, int *));
1383 # endif
1384 # if SOLARIS2 >= 10 && defined(_KERNEL)
1385 extern int fr_make_rst __P((fr_info_t *));
1386 extern int fr_make_icmp __P((fr_info_t *));
1387 extern void fr_calc_chksum __P((fr_info_t *, mb_t *));
1388 extern ipf_stack_t *ipf_find_stack(const zoneid_t, ipf_devstate_t *);
1389 # endif
1390 extern int iplopen __P((dev_t *, int, int, cred_t *));
1391 extern int iplclose __P((dev_t, int, int, cred_t *));
1392 extern int iplread __P((dev_t, uio_t *, cred_t *));
1393 extern int iplwrite __P((dev_t, uio_t *, cred_t *));
1394 # endif
1395 # ifdef __hpux
1396 extern int iplopen __P((dev_t, int, intptr_t, int));
1397 extern int iplclose __P((dev_t, int, int));
1398 extern int iplioctl __P((dev_t, int, caddr_t, int));
1399 extern int iplread __P((dev_t, uio_t *));
1400 extern int iplwrite __P((dev_t, uio_t *));
1401 extern int iplselect __P((dev_t, int));
1402 # endif
1403 extern int ipfsync __P((ipf_stack_t *));
1404 extern int fr_qout __P((queue_t *, mblk_t *));
1405 # else /* MENTAT */
1406 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *));
1407 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *));
1408 extern size_t mbufchainlen __P((mb_t *));
1409 # ifdef __sgi
1410 # include <sys/cred.h>
1411 extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *));
1412 extern int iplopen __P((dev_t *, int, int, cred_t *));
1413 extern int iplclose __P((dev_t, int, int, cred_t *));
1414 extern int iplread __P((dev_t, uio_t *, cred_t *));
1415 extern int iplwrite __P((dev_t, uio_t *, cred_t *));
1416 extern int ipfsync __P((ipf_stack_t *));
1417 extern int ipfilter_sgi_attach __P((void));
1418 extern void ipfilter_sgi_detach __P((void));
1419 extern void ipfilter_sgi_intfsync __P((void));
1420 # else
1421 # ifdef IPFILTER_LKM
1422 extern int iplidentify __P((char *));
1423 # endif
1424 # if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \
1425 (NetBSD >= 199511) || defined(__OpenBSD__)
1426 # if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \
1427 defined(__OpenBSD__) || (__FreeBSD_version >= 300000)
1428 # if (__FreeBSD_version >= 500024)
1429 # if (__FreeBSD_version >= 502116)
1430 extern int iplioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *));
1431 # else
1432 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct thread *));
1433 # endif /* __FreeBSD_version >= 502116 */
1434 # else
1435 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
1436 # endif /* __FreeBSD_version >= 500024 */
1437 # else
1438 extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
1439 # endif
1440 # if (__FreeBSD_version >= 500024)
1441 # if (__FreeBSD_version >= 502116)
1442 extern int iplopen __P((struct cdev*, int, int, struct thread *));
1443 extern int iplclose __P((struct cdev*, int, int, struct thread *));
1444 # else
1445 extern int iplopen __P((dev_t, int, int, struct thread *));
1446 extern int iplclose __P((dev_t, int, int, struct thread *));
1447 # endif /* __FreeBSD_version >= 502116 */
1448 # else
1449 extern int iplopen __P((dev_t, int, int, struct proc *));
1450 extern int iplclose __P((dev_t, int, int, struct proc *));
1451 # endif /* __FreeBSD_version >= 500024 */
1452 # else
1453 # ifdef linux
1454 extern int iplioctl __P((struct inode *, struct file *, u_int, u_long));
1455 # else
1456 extern int iplopen __P((dev_t, int));
1457 extern int iplclose __P((dev_t, int));
1458 extern int iplioctl __P((dev_t, int, caddr_t, int));
1459 # endif
1460 # endif /* (_BSDI_VERSION >= 199510) */
1461 # if BSD >= 199306
1462 # if (__FreeBSD_version >= 502116)
1463 extern int iplread __P((struct cdev*, struct uio *, int));
1464 extern int iplwrite __P((struct cdev*, struct uio *, int));
1465 # else
1466 extern int iplread __P((dev_t, struct uio *, int));
1467 extern int iplwrite __P((dev_t, struct uio *, int));
1468 # endif /* __FreeBSD_version >= 502116 */
1469 # else
1470 # ifndef linux
1471 extern int iplread __P((dev_t, struct uio *));
1472 extern int iplwrite __P((dev_t, struct uio *));
1473 # endif
1474 # endif /* BSD >= 199306 */
1475 # endif /* __ sgi */
1476 # endif /* MENTAT */
1477
1478 #endif /* #ifndef _KERNEL */
1479
1480 extern char *memstr __P((char *, char *, int, int));
1481 extern int count4bits __P((u_32_t));
1482 extern int count6bits __P((u_32_t *));
1483 extern int frrequest __P((int, ioctlcmd_t, caddr_t, int, int, ipf_stack_t *));
1484 extern char *getifname __P((struct ifnet *));
1485 extern int iplattach __P((ipf_stack_t *));
1486 extern int ipldetach __P((ipf_stack_t *));
1487 extern u_short ipf_cksum __P((u_short *, int));
1488 extern int copyinptr __P((void *, void *, size_t));
1489 extern int copyoutptr __P((void *, void *, size_t));
1490 extern int fr_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *));
1491 extern int fr_inobj __P((void *, void *, int));
1492 extern int fr_inobjsz __P((void *, void *, int, int));
1493 extern int fr_ioctlswitch __P((int, void *, ioctlcmd_t, int, int, void *,
1494 ipf_stack_t *));
1495 extern int fr_ipftune __P((ioctlcmd_t, void *, ipf_stack_t *));
1496 extern int fr_outobj __P((void *, void *, int));
1497 extern int fr_outobjsz __P((void *, void *, int, int));
1498 extern void *fr_pullup __P((mb_t *, fr_info_t *, int));
1499 extern void fr_resolvedest __P((struct frdest *, int, ipf_stack_t *));
1500 extern int fr_resolvefunc __P((void *));
1501 extern void *fr_resolvenic __P((char *, int, ipf_stack_t *));
1502 extern int fr_send_icmp_err __P((int, fr_info_t *, int));
1503 extern int fr_send_reset __P((fr_info_t *));
1504 #if (__FreeBSD_version < 490000) || !defined(_KERNEL)
1505 extern int ppsratecheck __P((struct timeval *, int *, int));
1506 #endif
1507 extern ipftq_t *fr_addtimeoutqueue __P((ipftq_t **, u_int, ipf_stack_t *));
1508 extern void fr_deletequeueentry __P((ipftqent_t *));
1509 extern int fr_deletetimeoutqueue __P((ipftq_t *));
1510 extern void fr_freetimeoutqueue __P((ipftq_t *, ipf_stack_t *));
1511 extern void fr_movequeue __P((ipftqent_t *, ipftq_t *, ipftq_t *,
1512 ipf_stack_t *));
1513 extern void fr_queueappend __P((ipftqent_t *, ipftq_t *, void *,
1514 ipf_stack_t *));
1515 extern void fr_queueback __P((ipftqent_t *, ipf_stack_t *));
1516 extern void fr_queuefront __P((ipftqent_t *));
1517 extern void fr_checkv4sum __P((fr_info_t *));
1518 extern int fr_checkl4sum __P((fr_info_t *));
1519 extern int fr_ifpfillv4addr __P((int, struct sockaddr_in *,
1520 struct sockaddr_in *, struct in_addr *,
1521 struct in_addr *));
1522 extern int fr_coalesce __P((fr_info_t *));
1523 #ifdef USE_INET6
1524 extern void fr_checkv6sum __P((fr_info_t *));
1525 extern int fr_ifpfillv6addr __P((int, struct sockaddr_in6 *,
1526 struct sockaddr_in6 *, struct in_addr *,
1527 struct in_addr *));
1528 #endif
1529
1530 #define IPFILTER_COMPAT
1531 extern int fr_incomptrans __P((ipfobj_t *, void *));
1532 extern int fr_outcomptrans __P((ipfobj_t *, void *));
1533
1534 extern int fr_addipftune __P((ipftuneable_t *, ipf_stack_t *));
1535 extern int fr_delipftune __P((ipftuneable_t *, ipf_stack_t *));
1536
1537 extern int frflush __P((minor_t, int, int, ipf_stack_t *));
1538 extern void frsync __P((int, int, void *, char *, ipf_stack_t *));
1539 #if SOLARIS2 >= 10
1540 extern void fr_ifindexsync __P((void *, void *, ipf_stack_t *));
1541 #endif
1542 extern frgroup_t *fr_addgroup __P((char *, void *, u_32_t, minor_t, int,
1543 ipf_stack_t *));
1544 extern int fr_derefrule __P((frentry_t **, ipf_stack_t *));
1545 extern void fr_delgroup __P((char *, minor_t, int, ipf_stack_t *));
1546 extern frgroup_t *fr_findgroup __P((char *, minor_t, int, frgroup_t ***,
1547 ipf_stack_t *));
1548
1549 extern int fr_loginit __P((ipf_stack_t *));
1550 extern int ipflog_clear __P((minor_t, ipf_stack_t *));
1551 extern int ipflog_read __P((minor_t, struct uio *, ipf_stack_t *));
1552 extern int ipflog __P((fr_info_t *, u_int));
1553 extern int ipllog __P((int, fr_info_t *, void **, size_t *, int *, int,
1554 ipf_stack_t *));
1555 extern void fr_logunload __P((ipf_stack_t *));
1556
1557 extern frentry_t *fr_acctpkt __P((fr_info_t *, u_32_t *));
1558 extern int fr_copytolog __P((int, char *, int));
1559 extern u_short fr_cksum __P((mb_t *, ip_t *, int, void *));
1560 extern void fr_deinitialise __P((ipf_stack_t *));
1561 extern frentry_t *fr_dolog __P((fr_info_t *, u_32_t *));
1562 extern frentry_t *fr_dstgrpmap __P((fr_info_t *, u_32_t *));
1563 extern void fr_fixskip __P((frentry_t **, frentry_t *, int));
1564 extern void fr_forgetifp __P((void *, ipf_stack_t *));
1565 extern frentry_t *fr_getrulen __P((int, char *, u_32_t,
1566 ipf_stack_t *));
1567 extern void fr_getstat __P((struct friostat *, ipf_stack_t *));
1568 extern int fr_ifpaddr __P((int, int, void *,
1569 struct in_addr *, struct in_addr *,
1570 ipf_stack_t *));
1571 extern int fr_initialise __P((ipf_stack_t *));
1572 extern int fr_lock __P((caddr_t, int *));
1573 extern int fr_makefrip __P((int, ip_t *, fr_info_t *));
1574 extern int fr_matchtag __P((ipftag_t *, ipftag_t *));
1575 extern int fr_matchicmpqueryreply __P((int, icmpinfo_t *,
1576 struct icmp *, int));
1577 extern u_32_t fr_newisn __P((fr_info_t *));
1578 extern u_short fr_nextipid __P((fr_info_t *));
1579 extern int fr_rulen __P((int, frentry_t *, ipf_stack_t *));
1580 extern int fr_scanlist __P((fr_info_t *, u_32_t));
1581 extern frentry_t *fr_srcgrpmap __P((fr_info_t *, u_32_t *));
1582 extern int fr_tcpudpchk __P((fr_info_t *, frtuc_t *));
1583 extern int fr_verifysrc __P((fr_info_t *fin));
1584 extern int fr_zerostats __P((char *, ipf_stack_t *));
1585 extern ipftoken_t *ipf_findtoken __P((int, int, void *, ipf_stack_t *));
1586 extern int ipf_getnextrule __P((ipftoken_t *, void *,
1587 ipf_stack_t *));
1588 extern void ipf_expiretokens __P((ipf_stack_t *));
1589 extern void ipf_freetoken __P((ipftoken_t *, ipf_stack_t *));
1590 extern int ipf_deltoken __P((int, int, void *, ipf_stack_t *));
1591 extern int ipf_genericiter __P((void *, int, void *, ipf_stack_t *));
1592 extern int ipf_extraflush __P((int, ipftq_t *, ipftq_t *, ipf_stack_t *));
1593 extern int ipf_flushclosing __P((int, int, ipftq_t *, ipftq_t *, ipf_stack_t *));
1594 extern int ipf_earlydrop __P((int, ipftq_t *, int, ipf_stack_t *));
1595
1596 #ifndef ipf_random
1597 extern u_32_t ipf_random __P((void));
1598 #endif
1599
1600 #if defined(_KERNEL)
1601 extern int fr_setzoneid __P((ipf_devstate_t *, void *));
1602 #endif
1603
1604 extern char ipfilter_version[];
1605 #ifdef USE_INET6
1606 extern int icmptoicmp6types[ICMP_MAXTYPE+1];
1607 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH];
1608 extern int icmpreplytype6[ICMP6_MAXTYPE + 1];
1609 #endif
1610 extern int icmpreplytype4[ICMP_MAXTYPE + 1];
1611 extern frentry_t *ipfrule_match __P((fr_info_t *));
1612
1613 extern void ipftuneable_alloc(ipf_stack_t *);
1614 extern void ipftuneable_free(ipf_stack_t *);
1615
1616 #endif /* __IP_FIL_H__ */