1 /* $NetBSD: pfctl_parser.c,v 1.11 2011/10/17 16:35:22 mbalmer Exp $ */
2 /* $OpenBSD: pfctl_parser.c,v 1.234 2006/10/31 23:46:24 mcbride Exp $ */
3
4 /*
5 * Copyright (c) 2001 Daniel Hartmeier
6 * Copyright (c) 2002,2003 Henning Brauer
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * - Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * - Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 #include <sys/types.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
38 #include <sys/param.h>
39 #include <net/if.h>
40 #include <netinet/in.h>
41 #include <netinet/in_systm.h>
42 #include <netinet/ip.h>
43 #include <netinet/ip_icmp.h>
44 #include <netinet/icmp6.h>
45 #include <net/pfvar.h>
46 #include <arpa/inet.h>
47
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <ctype.h>
52 #include <netdb.h>
53 #include <stdarg.h>
54 #include <errno.h>
55 #include <err.h>
56 #include <ifaddrs.h>
57 #include <unistd.h>
58
59 #include "pfctl_parser.h"
60 #include "pfctl.h"
61
62 #ifdef __NetBSD__
63 #include <net/if_compat.h>
64 #endif /* __NetBSD__ */
65
66 void print_op (u_int8_t, const char *, const char *);
67 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
68 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
69 void print_flags (u_int8_t);
70 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
71 struct pf_rule_addr *, u_int8_t, u_int8_t, int);
72 int ifa_skip_if(const char *filter, struct node_host *p);
73
74 struct node_host *ifa_grouplookup(const char *, int);
75 struct node_host *host_if(const char *, int);
76 struct node_host *host_v4(const char *, int);
77 struct node_host *host_v6(const char *, int);
78 struct node_host *host_dns(const char *, int, int);
79
80 const char *tcpflags = "FSRPAUEW";
81
82 static const struct icmptypeent icmp_type[] = {
83 { "echoreq", ICMP_ECHO },
84 { "echorep", ICMP_ECHOREPLY },
85 { "unreach", ICMP_UNREACH },
86 { "squench", ICMP_SOURCEQUENCH },
87 { "redir", ICMP_REDIRECT },
88 #ifdef ICMP_ALTHOSTADDR
89 { "althost", ICMP_ALTHOSTADDR },
90 #endif
91 { "routeradv", ICMP_ROUTERADVERT },
92 { "routersol", ICMP_ROUTERSOLICIT },
93 { "timex", ICMP_TIMXCEED },
94 { "paramprob", ICMP_PARAMPROB },
95 { "timereq", ICMP_TSTAMP },
96 { "timerep", ICMP_TSTAMPREPLY },
97 { "inforeq", ICMP_IREQ },
98 { "inforep", ICMP_IREQREPLY },
99 { "maskreq", ICMP_MASKREQ },
100 { "maskrep", ICMP_MASKREPLY },
101 #ifdef ICMP_TRACEROUTE
102 { "trace", ICMP_TRACEROUTE },
103 #endif
104 #ifdef ICMP_DATACONVERR
105 { "dataconv", ICMP_DATACONVERR },
106 #endif
107 #ifdef ICMP_MOBILE_REDIRECT
108 { "mobredir", ICMP_MOBILE_REDIRECT },
109 #endif
110 #ifdef ICMP_IPV6_WHEREAREYOU
111 { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
112 #endif
113 #ifdef ICMP_IPV6_IAMHERE
114 { "ipv6-here", ICMP_IPV6_IAMHERE },
115 #endif
116 #ifdef ICMP_MOBILE_REGREQUEST
117 { "mobregreq", ICMP_MOBILE_REGREQUEST },
118 #endif
119 #ifdef ICMP_MOBILE_REGREPLY
120 { "mobregrep", ICMP_MOBILE_REGREPLY },
121 #endif
122 #ifdef ICMP_SKIP
123 { "skip", ICMP_SKIP },
124 #endif
125 #ifdef ICMP_PHOTURIS
126 { "photuris", ICMP_PHOTURIS }
127 #endif
128 };
129
130 static const struct icmptypeent icmp6_type[] = {
131 { "unreach", ICMP6_DST_UNREACH },
132 { "toobig", ICMP6_PACKET_TOO_BIG },
133 { "timex", ICMP6_TIME_EXCEEDED },
134 { "paramprob", ICMP6_PARAM_PROB },
135 { "echoreq", ICMP6_ECHO_REQUEST },
136 { "echorep", ICMP6_ECHO_REPLY },
137 { "groupqry", ICMP6_MEMBERSHIP_QUERY },
138 { "listqry", MLD_LISTENER_QUERY },
139 { "grouprep", ICMP6_MEMBERSHIP_REPORT },
140 { "listenrep", MLD_LISTENER_REPORT },
141 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION },
142 { "listendone", MLD_LISTENER_DONE },
143 { "routersol", ND_ROUTER_SOLICIT },
144 { "routeradv", ND_ROUTER_ADVERT },
145 { "neighbrsol", ND_NEIGHBOR_SOLICIT },
146 { "neighbradv", ND_NEIGHBOR_ADVERT },
147 { "redir", ND_REDIRECT },
148 { "routrrenum", ICMP6_ROUTER_RENUMBERING },
149 { "wrureq", ICMP6_WRUREQUEST },
150 { "wrurep", ICMP6_WRUREPLY },
151 { "fqdnreq", ICMP6_FQDN_QUERY },
152 { "fqdnrep", ICMP6_FQDN_REPLY },
153 { "niqry", ICMP6_NI_QUERY },
154 { "nirep", ICMP6_NI_REPLY },
155 { "mtraceresp", MLD_MTRACE_RESP },
156 { "mtrace", MLD_MTRACE }
157 };
158
159 static const struct icmpcodeent icmp_code[] = {
160 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
161 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
162 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
163 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
164 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
165 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
166 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
167 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
168 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
169 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
170 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
171 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
172 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
173 #ifdef ICMP_UNREACH_FILTER_PROHIB
174 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
175 #endif
176 #ifdef ICMP_UNREACH_HOST_PRECEDENCE
177 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
178 #endif
179 #ifdef ICMP_UNREACH_PRECEDENCE_CUTOFF
180 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
181 #endif
182 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
183 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
184 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
185 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
186 #ifdef ICMP_ROUTERADVERT_NORMAL
187 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
188 #endif
189 #ifdef ICMP_ROUTERADVERT_NOROUTE_COMMON
190 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
191 #endif
192 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
193 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
194 #ifdef ICMP_PARAMPROB_ERRATPTR
195 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
196 #endif
197 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
198 #ifdef ICMP_PARAMPROB_LENGTH
199 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
200 #endif
201 #ifdef ICMP_PHOTURIS
202 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
203 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
204 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
205 #endif
206 };
207
208 static const struct icmpcodeent icmp6_code[] = {
209 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
210 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
211 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
212 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
213 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
214 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
215 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
216 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
217 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
218 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
219 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
220 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
221 };
222
223 const struct pf_timeout pf_timeouts[] = {
224 { "tcp.first", PFTM_TCP_FIRST_PACKET },
225 { "tcp.opening", PFTM_TCP_OPENING },
226 { "tcp.established", PFTM_TCP_ESTABLISHED },
227 { "tcp.closing", PFTM_TCP_CLOSING },
228 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
229 { "tcp.closed", PFTM_TCP_CLOSED },
230 { "tcp.tsdiff", PFTM_TS_DIFF },
231 { "udp.first", PFTM_UDP_FIRST_PACKET },
232 { "udp.single", PFTM_UDP_SINGLE },
233 { "udp.multiple", PFTM_UDP_MULTIPLE },
234 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
235 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
236 { "other.first", PFTM_OTHER_FIRST_PACKET },
237 { "other.single", PFTM_OTHER_SINGLE },
238 { "other.multiple", PFTM_OTHER_MULTIPLE },
239 { "frag", PFTM_FRAG },
240 { "interval", PFTM_INTERVAL },
241 { "adaptive.start", PFTM_ADAPTIVE_START },
242 { "adaptive.end", PFTM_ADAPTIVE_END },
243 { "src.track", PFTM_SRC_NODE },
244 { NULL, 0 }
245 };
246
247 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)248 geticmptypebynumber(u_int8_t type, sa_family_t af)
249 {
250 unsigned int i;
251
252 if (af != AF_INET6) {
253 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
254 i++) {
255 if (type == icmp_type[i].type)
256 return (&icmp_type[i]);
257 }
258 } else {
259 for (i=0; i < (sizeof (icmp6_type) /
260 sizeof(icmp6_type[0])); i++) {
261 if (type == icmp6_type[i].type)
262 return (&icmp6_type[i]);
263 }
264 }
265 return (NULL);
266 }
267
268 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)269 geticmptypebyname(char *w, sa_family_t af)
270 {
271 unsigned int i;
272
273 if (af != AF_INET6) {
274 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
275 i++) {
276 if (!strcmp(w, icmp_type[i].name))
277 return (&icmp_type[i]);
278 }
279 } else {
280 for (i=0; i < (sizeof (icmp6_type) /
281 sizeof(icmp6_type[0])); i++) {
282 if (!strcmp(w, icmp6_type[i].name))
283 return (&icmp6_type[i]);
284 }
285 }
286 return (NULL);
287 }
288
289 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)290 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
291 {
292 unsigned int i;
293
294 if (af != AF_INET6) {
295 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
296 i++) {
297 if (type == icmp_code[i].type &&
298 code == icmp_code[i].code)
299 return (&icmp_code[i]);
300 }
301 } else {
302 for (i=0; i < (sizeof (icmp6_code) /
303 sizeof(icmp6_code[0])); i++) {
304 if (type == icmp6_code[i].type &&
305 code == icmp6_code[i].code)
306 return (&icmp6_code[i]);
307 }
308 }
309 return (NULL);
310 }
311
312 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)313 geticmpcodebyname(u_long type, char *w, sa_family_t af)
314 {
315 unsigned int i;
316
317 if (af != AF_INET6) {
318 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
319 i++) {
320 if (type == icmp_code[i].type &&
321 !strcmp(w, icmp_code[i].name))
322 return (&icmp_code[i]);
323 }
324 } else {
325 for (i=0; i < (sizeof (icmp6_code) /
326 sizeof(icmp6_code[0])); i++) {
327 if (type == icmp6_code[i].type &&
328 !strcmp(w, icmp6_code[i].name))
329 return (&icmp6_code[i]);
330 }
331 }
332 return (NULL);
333 }
334
335 void
print_op(u_int8_t op,const char * a1,const char * a2)336 print_op(u_int8_t op, const char *a1, const char *a2)
337 {
338 if (op == PF_OP_IRG)
339 printf(" %s >< %s", a1, a2);
340 else if (op == PF_OP_XRG)
341 printf(" %s <> %s", a1, a2);
342 else if (op == PF_OP_EQ)
343 printf(" = %s", a1);
344 else if (op == PF_OP_NE)
345 printf(" != %s", a1);
346 else if (op == PF_OP_LT)
347 printf(" < %s", a1);
348 else if (op == PF_OP_LE)
349 printf(" <= %s", a1);
350 else if (op == PF_OP_GT)
351 printf(" > %s", a1);
352 else if (op == PF_OP_GE)
353 printf(" >= %s", a1);
354 else if (op == PF_OP_RRG)
355 printf(" %s:%s", a1, a2);
356 }
357
358 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto)359 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
360 {
361 char a1[6], a2[6];
362 struct servent *s;
363
364 s = getservbyport(p1, proto);
365 p1 = ntohs(p1);
366 p2 = ntohs(p2);
367 snprintf(a1, sizeof(a1), "%u", p1);
368 snprintf(a2, sizeof(a2), "%u", p2);
369 printf(" port");
370 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
371 print_op(op, s->s_name, a2);
372 else
373 print_op(op, a1, a2);
374 }
375
376 void
print_ugid(u_int8_t op,unsigned u1,unsigned u2,const char * t,unsigned umax)377 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
378 {
379 char a1[11], a2[11];
380
381 snprintf(a1, sizeof(a1), "%u", u1);
382 snprintf(a2, sizeof(a2), "%u", u2);
383 printf(" %s", t);
384 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
385 print_op(op, "unknown", a2);
386 else
387 print_op(op, a1, a2);
388 }
389
390 void
print_flags(u_int8_t f)391 print_flags(u_int8_t f)
392 {
393 int i;
394
395 for (i = 0; tcpflags[i]; ++i)
396 if (f & (1 << i))
397 printf("%c", tcpflags[i]);
398 }
399
400 void
print_fromto(struct pf_rule_addr * src,pf_osfp_t osfp,struct pf_rule_addr * dst,sa_family_t af,u_int8_t proto,int verbose)401 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
402 sa_family_t af, u_int8_t proto, int verbose)
403 {
404 char buf[PF_OSFP_LEN*3];
405 if (src->addr.type == PF_ADDR_ADDRMASK &&
406 dst->addr.type == PF_ADDR_ADDRMASK &&
407 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
408 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
409 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
410 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
411 !src->neg && !dst->neg &&
412 !src->port_op && !dst->port_op &&
413 osfp == PF_OSFP_ANY)
414 printf(" all");
415 else {
416 printf(" from ");
417 if (src->neg)
418 printf("! ");
419 print_addr(&src->addr, af, verbose);
420 if (src->port_op)
421 print_port(src->port_op, src->port[0],
422 src->port[1],
423 proto == IPPROTO_TCP ? "tcp" : "udp");
424 if (osfp != PF_OSFP_ANY)
425 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
426 sizeof(buf)));
427
428 printf(" to ");
429 if (dst->neg)
430 printf("! ");
431 print_addr(&dst->addr, af, verbose);
432 if (dst->port_op)
433 print_port(dst->port_op, dst->port[0],
434 dst->port[1],
435 proto == IPPROTO_TCP ? "tcp" : "udp");
436 }
437 }
438
439 void
print_pool(struct pf_pool * pool,u_int16_t p1,u_int16_t p2,sa_family_t af,int id)440 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
441 sa_family_t af, int id)
442 {
443 struct pf_pooladdr *pooladdr;
444
445 if ((TAILQ_FIRST(&pool->list) != NULL) &&
446 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
447 printf("{ ");
448 TAILQ_FOREACH(pooladdr, &pool->list, entries){
449 switch (id) {
450 case PF_NAT:
451 case PF_RDR:
452 case PF_BINAT:
453 print_addr(&pooladdr->addr, af, 0);
454 break;
455 case PF_PASS:
456 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
457 printf("%s", pooladdr->ifname);
458 else {
459 printf("(%s ", pooladdr->ifname);
460 print_addr(&pooladdr->addr, af, 0);
461 printf(")");
462 }
463 break;
464 default:
465 break;
466 }
467 if (TAILQ_NEXT(pooladdr, entries) != NULL)
468 printf(", ");
469 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
470 printf(" }");
471 }
472 switch (id) {
473 case PF_NAT:
474 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
475 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
476 if (p1 == p2)
477 printf(" port %u", p1);
478 else
479 printf(" port %u:%u", p1, p2);
480 }
481 break;
482 case PF_RDR:
483 if (p1) {
484 printf(" port %u", p1);
485 if (p2 && (p2 != p1))
486 printf(":%u", p2);
487 }
488 break;
489 default:
490 break;
491 }
492 switch (pool->opts & PF_POOL_TYPEMASK) {
493 case PF_POOL_NONE:
494 break;
495 case PF_POOL_BITMASK:
496 printf(" bitmask");
497 break;
498 case PF_POOL_RANDOM:
499 printf(" random");
500 break;
501 case PF_POOL_SRCHASH:
502 printf(" source-hash 0x%08x%08x%08x%08x",
503 pool->key.key32[0], pool->key.key32[1],
504 pool->key.key32[2], pool->key.key32[3]);
505 break;
506 case PF_POOL_ROUNDROBIN:
507 printf(" round-robin");
508 break;
509 }
510 if (pool->opts & PF_POOL_STICKYADDR)
511 printf(" sticky-address");
512 if (id == PF_NAT && p1 == 0 && p2 == 0)
513 printf(" static-port");
514 }
515
516 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
517 const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
518 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
519 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
520
521 void
print_status(struct pf_status * s,int opts)522 print_status(struct pf_status *s, int opts)
523 {
524 char statline[80], *running;
525 time_t runtime;
526 int i;
527 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
528 static const char hex[] = "0123456789abcdef";
529
530 runtime = time(NULL) - s->since;
531 running = s->running ? "Enabled" : "Disabled";
532
533 if (s->since) {
534 unsigned sec, min, hrs, day = runtime;
535
536 sec = day % 60;
537 day /= 60;
538 min = day % 60;
539 day /= 60;
540 hrs = day % 24;
541 day /= 24;
542 snprintf(statline, sizeof(statline),
543 "Status: %s for %u days %.2u:%.2u:%.2u",
544 running, day, hrs, min, sec);
545 } else
546 snprintf(statline, sizeof(statline), "Status: %s", running);
547 printf("%-44s", statline);
548 switch (s->debug) {
549 case PF_DEBUG_NONE:
550 printf("%15s\n\n", "Debug: None");
551 break;
552 case PF_DEBUG_URGENT:
553 printf("%15s\n\n", "Debug: Urgent");
554 break;
555 case PF_DEBUG_MISC:
556 printf("%15s\n\n", "Debug: Misc");
557 break;
558 case PF_DEBUG_NOISY:
559 printf("%15s\n\n", "Debug: Loud");
560 break;
561 }
562
563 if (opts & PF_OPT_VERBOSE) {
564 printf("Hostid: 0x%08x\n", ntohl(s->hostid));
565
566 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
567 buf[i + i] = hex[s->pf_chksum[i] >> 4];
568 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
569 }
570 buf[i + i] = '\0';
571 printf("Checksum: 0x%s\n\n", buf);
572 }
573
574 if (s->ifname[0] != 0) {
575 printf("Interface Stats for %-16s %5s %16s\n",
576 s->ifname, "IPv4", "IPv6");
577 printf(" %-25s %14llu %16llu\n", "Bytes In",
578 (unsigned long long)s->bcounters[0][0],
579 (unsigned long long)s->bcounters[1][0]);
580 printf(" %-25s %14llu %16llu\n", "Bytes Out",
581 (unsigned long long)s->bcounters[0][1],
582 (unsigned long long)s->bcounters[1][1]);
583 printf(" Packets In\n");
584 printf(" %-23s %14llu %16llu\n", "Passed",
585 (unsigned long long)s->pcounters[0][0][PF_PASS],
586 (unsigned long long)s->pcounters[1][0][PF_PASS]);
587 printf(" %-23s %14llu %16llu\n", "Blocked",
588 (unsigned long long)s->pcounters[0][0][PF_DROP],
589 (unsigned long long)s->pcounters[1][0][PF_DROP]);
590 printf(" Packets Out\n");
591 printf(" %-23s %14llu %16llu\n", "Passed",
592 (unsigned long long)s->pcounters[0][1][PF_PASS],
593 (unsigned long long)s->pcounters[1][1][PF_PASS]);
594 printf(" %-23s %14llu %16llu\n\n", "Blocked",
595 (unsigned long long)s->pcounters[0][1][PF_DROP],
596 (unsigned long long)s->pcounters[1][1][PF_DROP]);
597 }
598 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
599 printf(" %-25s %14u %14s\n", "current entries", s->states, "");
600 for (i = 0; i < FCNT_MAX; i++) {
601 printf(" %-25s %14llu ", pf_fcounters[i],
602 (unsigned long long)s->fcounters[i]);
603 if (runtime > 0)
604 printf("%14.1f/s\n",
605 (double)s->fcounters[i] / (double)runtime);
606 else
607 printf("%14s\n", "");
608 }
609 if (opts & PF_OPT_VERBOSE) {
610 printf("Source Tracking Table\n");
611 printf(" %-25s %14u %14s\n", "current entries",
612 s->src_nodes, "");
613 for (i = 0; i < SCNT_MAX; i++) {
614 printf(" %-25s %14lld ", pf_scounters[i],
615 (unsigned long long)s->scounters[i]);
616 if (runtime > 0)
617 printf("%14.1f/s\n",
618 (double)s->scounters[i] / (double)runtime);
619 else
620 printf("%14s\n", "");
621 }
622 }
623 printf("Counters\n");
624 for (i = 0; i < PFRES_MAX; i++) {
625 printf(" %-25s %14llu ", pf_reasons[i],
626 (unsigned long long)s->counters[i]);
627 if (runtime > 0)
628 printf("%14.1f/s\n",
629 (double)s->counters[i] / (double)runtime);
630 else
631 printf("%14s\n", "");
632 }
633 if (opts & PF_OPT_VERBOSE) {
634 printf("Limit Counters\n");
635 for (i = 0; i < LCNT_MAX; i++) {
636 printf(" %-25s %14lld ", pf_lcounters[i],
637 (unsigned long long)s->lcounters[i]);
638 if (runtime > 0)
639 printf("%14.1f/s\n",
640 (double)s->lcounters[i] / (double)runtime);
641 else
642 printf("%14s\n", "");
643 }
644 }
645 }
646
647 void
print_src_node(struct pf_src_node * sn,int opts)648 print_src_node(struct pf_src_node *sn, int opts)
649 {
650 struct pf_addr_wrap aw;
651 int min, sec;
652
653 memset(&aw, 0, sizeof(aw));
654 if (sn->af == AF_INET)
655 aw.v.a.mask.addr32[0] = 0xffffffff;
656 else
657 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
658
659 aw.v.a.addr = sn->addr;
660 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
661 printf(" -> ");
662 aw.v.a.addr = sn->raddr;
663 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
664 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
665 sn->conn, sn->conn_rate.count / 1000,
666 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
667 if (opts & PF_OPT_VERBOSE) {
668 sec = sn->creation % 60;
669 sn->creation /= 60;
670 min = sn->creation % 60;
671 sn->creation /= 60;
672 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
673 if (sn->states == 0) {
674 sec = sn->expire % 60;
675 sn->expire /= 60;
676 min = sn->expire % 60;
677 sn->expire /= 60;
678 printf(", expires in %.2u:%.2u:%.2u",
679 sn->expire, min, sec);
680 }
681 printf(", %llu pkts, %llu bytes",
682 (unsigned long long)sn->packets[0] + sn->packets[1],
683 (unsigned long long)sn->bytes[0] + sn->bytes[1]);
684 switch (sn->ruletype) {
685 case PF_NAT:
686 if (sn->rule.nr != -1)
687 printf(", nat rule %u", sn->rule.nr);
688 break;
689 case PF_RDR:
690 if (sn->rule.nr != -1)
691 printf(", rdr rule %u", sn->rule.nr);
692 break;
693 case PF_PASS:
694 if (sn->rule.nr != -1)
695 printf(", filter rule %u", sn->rule.nr);
696 break;
697 }
698 printf("\n");
699 }
700 }
701
702 void
print_rule(struct pf_rule * r,const char * anchor_call,int verbose)703 print_rule(struct pf_rule *r, const char *anchor_call, int verbose)
704 {
705 static const char *actiontypes[] = { "pass", "block", "scrub",
706 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
707 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
708 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
709 "binat-anchor", "rdr-anchor", "rdr-anchor" };
710 int i, opts;
711
712 if (verbose)
713 printf("@%d ", r->nr);
714 if (r->action > PF_NORDR)
715 printf("action(%d)", r->action);
716 else if (anchor_call[0]) {
717 if (anchor_call[0] == '_') {
718 printf("%s", anchortypes[r->action]);
719 } else
720 printf("%s \"%s\"", anchortypes[r->action],
721 anchor_call);
722 } else {
723 printf("%s", actiontypes[r->action]);
724 if (r->natpass)
725 printf(" pass");
726 }
727 if (r->action == PF_DROP) {
728 if (r->rule_flag & PFRULE_RETURN)
729 printf(" return");
730 else if (r->rule_flag & PFRULE_RETURNRST) {
731 if (!r->return_ttl)
732 printf(" return-rst");
733 else
734 printf(" return-rst(ttl %d)", r->return_ttl);
735 } else if (r->rule_flag & PFRULE_RETURNICMP) {
736 const struct icmpcodeent *ic, *ic6;
737
738 ic = geticmpcodebynumber(r->return_icmp >> 8,
739 r->return_icmp & 255, AF_INET);
740 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
741 r->return_icmp6 & 255, AF_INET6);
742
743 switch (r->af) {
744 case AF_INET:
745 printf(" return-icmp");
746 if (ic == NULL)
747 printf("(%u)", r->return_icmp & 255);
748 else
749 printf("(%s)", ic->name);
750 break;
751 case AF_INET6:
752 printf(" return-icmp6");
753 if (ic6 == NULL)
754 printf("(%u)", r->return_icmp6 & 255);
755 else
756 printf("(%s)", ic6->name);
757 break;
758 default:
759 printf(" return-icmp");
760 if (ic == NULL)
761 printf("(%u, ", r->return_icmp & 255);
762 else
763 printf("(%s, ", ic->name);
764 if (ic6 == NULL)
765 printf("%u)", r->return_icmp6 & 255);
766 else
767 printf("%s)", ic6->name);
768 break;
769 }
770 } else
771 printf(" drop");
772 }
773 if (r->direction == PF_IN)
774 printf(" in");
775 else if (r->direction == PF_OUT)
776 printf(" out");
777 if (r->log) {
778 printf(" log");
779 if (r->log & ~PF_LOG || r->logif) {
780 int count = 0;
781
782 printf(" (");
783 if (r->log & PF_LOG_ALL)
784 printf("%sall", count++ ? ", " : "");
785 if (r->log & PF_LOG_SOCKET_LOOKUP)
786 printf("%suser", count++ ? ", " : "");
787 if (r->logif)
788 printf("%sto pflog%u", count++ ? ", " : "",
789 r->logif);
790 printf(")");
791 }
792 }
793 if (r->quick)
794 printf(" quick");
795 if (r->ifname[0]) {
796 if (r->ifnot)
797 printf(" on ! %s", r->ifname);
798 else
799 printf(" on %s", r->ifname);
800 }
801 if (r->rt) {
802 if (r->rt == PF_ROUTETO)
803 printf(" route-to");
804 else if (r->rt == PF_REPLYTO)
805 printf(" reply-to");
806 else if (r->rt == PF_DUPTO)
807 printf(" dup-to");
808 else if (r->rt == PF_FASTROUTE)
809 printf(" fastroute");
810 if (r->rt != PF_FASTROUTE) {
811 printf(" ");
812 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
813 }
814 }
815 if (r->af) {
816 if (r->af == AF_INET)
817 printf(" inet");
818 else
819 printf(" inet6");
820 }
821 if (r->proto) {
822 struct protoent *p;
823
824 if ((p = getprotobynumber(r->proto)) != NULL)
825 printf(" proto %s", p->p_name);
826 else
827 printf(" proto %u", r->proto);
828 }
829 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
830 verbose);
831 if (r->uid.op)
832 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
833 UID_MAX);
834 if (r->gid.op)
835 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
836 GID_MAX);
837 if (r->flags || r->flagset) {
838 printf(" flags ");
839 print_flags(r->flags);
840 printf("/");
841 print_flags(r->flagset);
842 } else if (r->action == PF_PASS &&
843 (!r->proto || r->proto == IPPROTO_TCP) &&
844 !(r->rule_flag & PFRULE_FRAGMENT) &&
845 !anchor_call[0] && r->keep_state)
846 printf(" flags any");
847 if (r->type) {
848 const struct icmptypeent *it;
849
850 it = geticmptypebynumber(r->type-1, r->af);
851 if (r->af != AF_INET6)
852 printf(" icmp-type");
853 else
854 printf(" icmp6-type");
855 if (it != NULL)
856 printf(" %s", it->name);
857 else
858 printf(" %u", r->type-1);
859 if (r->code) {
860 const struct icmpcodeent *ic;
861
862 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
863 if (ic != NULL)
864 printf(" code %s", ic->name);
865 else
866 printf(" code %u", r->code-1);
867 }
868 }
869 if (r->tos)
870 printf(" tos 0x%2.2x", r->tos);
871 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
872 printf(" no state");
873 else if (r->keep_state == PF_STATE_NORMAL)
874 printf(" keep state");
875 else if (r->keep_state == PF_STATE_MODULATE)
876 printf(" modulate state");
877 else if (r->keep_state == PF_STATE_SYNPROXY)
878 printf(" synproxy state");
879 if (r->prob) {
880 char buf[20];
881
882 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
883 for (i = strlen(buf)-1; i > 0; i--) {
884 if (buf[i] == '0')
885 buf[i] = '\0';
886 else {
887 if (buf[i] == '.')
888 buf[i] = '\0';
889 break;
890 }
891 }
892 printf(" probability %s%%", buf);
893 }
894 opts = 0;
895 if (r->max_states || r->max_src_nodes || r->max_src_states)
896 opts = 1;
897 if (r->rule_flag & PFRULE_NOSYNC)
898 opts = 1;
899 if (r->rule_flag & PFRULE_SRCTRACK)
900 opts = 1;
901 if (r->rule_flag & PFRULE_IFBOUND)
902 opts = 1;
903 for (i = 0; !opts && i < PFTM_MAX; ++i)
904 if (r->timeout[i])
905 opts = 1;
906 if (opts) {
907 printf(" (");
908 if (r->max_states) {
909 printf("max %u", r->max_states);
910 opts = 0;
911 }
912 if (r->rule_flag & PFRULE_NOSYNC) {
913 if (!opts)
914 printf(", ");
915 printf("no-sync");
916 opts = 0;
917 }
918 if (r->rule_flag & PFRULE_SRCTRACK) {
919 if (!opts)
920 printf(", ");
921 printf("source-track");
922 if (r->rule_flag & PFRULE_RULESRCTRACK)
923 printf(" rule");
924 else
925 printf(" global");
926 opts = 0;
927 }
928 if (r->max_src_states) {
929 if (!opts)
930 printf(", ");
931 printf("max-src-states %u", r->max_src_states);
932 opts = 0;
933 }
934 if (r->max_src_conn) {
935 if (!opts)
936 printf(", ");
937 printf("max-src-conn %u", r->max_src_conn);
938 opts = 0;
939 }
940 if (r->max_src_conn_rate.limit) {
941 if (!opts)
942 printf(", ");
943 printf("max-src-conn-rate %u/%u",
944 r->max_src_conn_rate.limit,
945 r->max_src_conn_rate.seconds);
946 opts = 0;
947 }
948 if (r->max_src_nodes) {
949 if (!opts)
950 printf(", ");
951 printf("max-src-nodes %u", r->max_src_nodes);
952 opts = 0;
953 }
954 if (r->overload_tblname[0]) {
955 if (!opts)
956 printf(", ");
957 printf("overload <%s>", r->overload_tblname);
958 if (r->flush)
959 printf(" flush");
960 if (r->flush & PF_FLUSH_GLOBAL)
961 printf(" global");
962 }
963 if (r->rule_flag & PFRULE_IFBOUND) {
964 if (!opts)
965 printf(", ");
966 printf("if-bound");
967 opts = 0;
968 }
969 for (i = 0; i < PFTM_MAX; ++i)
970 if (r->timeout[i]) {
971 int j;
972
973 if (!opts)
974 printf(", ");
975 opts = 0;
976 for (j = 0; pf_timeouts[j].name != NULL;
977 ++j)
978 if (pf_timeouts[j].timeout == i)
979 break;
980 printf("%s %u", pf_timeouts[j].name == NULL ?
981 "inv.timeout" : pf_timeouts[j].name,
982 r->timeout[i]);
983 }
984 printf(")");
985 }
986 if (r->rule_flag & PFRULE_FRAGMENT)
987 printf(" fragment");
988 if (r->rule_flag & PFRULE_NODF)
989 printf(" no-df");
990 if (r->rule_flag & PFRULE_RANDOMID)
991 printf(" random-id");
992 if (r->min_ttl)
993 printf(" min-ttl %d", r->min_ttl);
994 if (r->max_mss)
995 printf(" max-mss %d", r->max_mss);
996 if (r->allow_opts)
997 printf(" allow-opts");
998 if (r->action == PF_SCRUB) {
999 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1000 printf(" reassemble tcp");
1001
1002 if (r->rule_flag & PFRULE_FRAGDROP)
1003 printf(" fragment drop-ovl");
1004 else if (r->rule_flag & PFRULE_FRAGCROP)
1005 printf(" fragment crop");
1006 else
1007 printf(" fragment reassemble");
1008 }
1009 if (r->label[0])
1010 printf(" label \"%s\"", r->label);
1011 if (r->qname[0] && r->pqname[0])
1012 printf(" queue(%s, %s)", r->qname, r->pqname);
1013 else if (r->qname[0])
1014 printf(" queue %s", r->qname);
1015 if (r->tagname[0])
1016 printf(" tag %s", r->tagname);
1017 if (r->match_tagname[0]) {
1018 if (r->match_tag_not)
1019 printf(" !");
1020 printf(" tagged %s", r->match_tagname);
1021 }
1022 if (r->rtableid != -1)
1023 printf(" rtable %u", r->rtableid);
1024 if (!anchor_call[0] && (r->action == PF_NAT ||
1025 r->action == PF_BINAT || r->action == PF_RDR)) {
1026 printf(" -> ");
1027 print_pool(&r->rpool, r->rpool.proxy_port[0],
1028 r->rpool.proxy_port[1], r->af, r->action);
1029 }
1030 }
1031
1032 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1033 print_tabledef(const char *name, int flags, int addrs,
1034 struct node_tinithead *nodes)
1035 {
1036 struct node_tinit *ti, *nti;
1037 struct node_host *h;
1038
1039 printf("table <%s>", name);
1040 if (flags & PFR_TFLAG_CONST)
1041 printf(" const");
1042 if (flags & PFR_TFLAG_PERSIST)
1043 printf(" persist");
1044 SIMPLEQ_FOREACH(ti, nodes, entries) {
1045 if (ti->file) {
1046 printf(" file \"%s\"", ti->file);
1047 continue;
1048 }
1049 printf(" {");
1050 for (;;) {
1051 for (h = ti->host; h != NULL; h = h->next) {
1052 printf(h->not ? " !" : " ");
1053 print_addr(&h->addr, h->af, 0);
1054 }
1055 nti = SIMPLEQ_NEXT(ti, entries);
1056 if (nti != NULL && nti->file == NULL)
1057 ti = nti; /* merge lists */
1058 else
1059 break;
1060 }
1061 printf(" }");
1062 }
1063 if (addrs && SIMPLEQ_EMPTY(nodes))
1064 printf(" { }");
1065 printf("\n");
1066 }
1067
1068 int
parse_flags(char * s)1069 parse_flags(char *s)
1070 {
1071 char *p, *q;
1072 u_int8_t f = 0;
1073
1074 for (p = s; *p; p++) {
1075 if ((q = strchr(tcpflags, *p)) == NULL)
1076 return -1;
1077 else
1078 f |= 1 << (q - tcpflags);
1079 }
1080 return (f ? f : PF_TH_ALL);
1081 }
1082
1083 void
set_ipmask(struct node_host * h,u_int8_t b)1084 set_ipmask(struct node_host *h, u_int8_t b)
1085 {
1086 struct pf_addr *m, *n;
1087 int i, j = 0;
1088
1089 m = &h->addr.v.a.mask;
1090 memset(m, 0, sizeof(*m));
1091
1092 while (b >= 32) {
1093 m->addr32[j++] = 0xffffffff;
1094 b -= 32;
1095 }
1096 for (i = 31; i > 31-b; --i)
1097 m->addr32[j] |= (1 << i);
1098 if (b)
1099 m->addr32[j] = htonl(m->addr32[j]);
1100
1101 /* Mask off bits of the address that will never be used. */
1102 n = &h->addr.v.a.addr;
1103 if (h->addr.type == PF_ADDR_ADDRMASK)
1104 for (i = 0; i < 4; i++)
1105 n->addr32[i] = n->addr32[i] & m->addr32[i];
1106 }
1107
1108 int
check_netmask(struct node_host * h,sa_family_t af)1109 check_netmask(struct node_host *h, sa_family_t af)
1110 {
1111 struct node_host *n = NULL;
1112 struct pf_addr *m;
1113
1114 for (n = h; n != NULL; n = n->next) {
1115 if (h->addr.type == PF_ADDR_TABLE)
1116 continue;
1117 m = &h->addr.v.a.mask;
1118 /* fix up netmask for dynaddr */
1119 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1120 unmask(m, AF_INET6) > 32)
1121 set_ipmask(n, 32);
1122 /* netmasks > 32 bit are invalid on v4 */
1123 if (af == AF_INET &&
1124 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1125 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1126 unmask(m, AF_INET6));
1127 return (1);
1128 }
1129 }
1130 return (0);
1131 }
1132
1133 /* interface lookup routines */
1134
1135 struct node_host *iftab;
1136
1137 void
ifa_load(void)1138 ifa_load(void)
1139 {
1140 struct ifaddrs *ifap, *ifa;
1141 struct node_host *n = NULL, *h = NULL;
1142
1143 if (getifaddrs(&ifap) < 0)
1144 err(1, "getifaddrs");
1145
1146 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1147 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1148 ifa->ifa_addr->sa_family == AF_INET6 ||
1149 ifa->ifa_addr->sa_family == AF_LINK))
1150 continue;
1151 n = calloc(1, sizeof(struct node_host));
1152 if (n == NULL)
1153 err(1, "address: calloc");
1154 n->af = ifa->ifa_addr->sa_family;
1155 n->ifa_flags = ifa->ifa_flags;
1156 #ifdef __KAME__
1157 if (n->af == AF_INET6 &&
1158 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1159 ifa->ifa_addr)->sin6_addr) &&
1160 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1161 0) {
1162 struct sockaddr_in6 *sin6;
1163
1164 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1165 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1166 sin6->sin6_addr.s6_addr[3];
1167 sin6->sin6_addr.s6_addr[2] = 0;
1168 sin6->sin6_addr.s6_addr[3] = 0;
1169 }
1170 #endif
1171 n->ifindex = 0;
1172 if (n->af == AF_INET) {
1173 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1174 ifa->ifa_addr)->sin_addr.s_addr,
1175 sizeof(struct in_addr));
1176 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1177 ifa->ifa_netmask)->sin_addr.s_addr,
1178 sizeof(struct in_addr));
1179 if (ifa->ifa_broadaddr != NULL)
1180 memcpy(&n->bcast, &((struct sockaddr_in *)
1181 ifa->ifa_broadaddr)->sin_addr.s_addr,
1182 sizeof(struct in_addr));
1183 if (ifa->ifa_dstaddr != NULL)
1184 memcpy(&n->peer, &((struct sockaddr_in *)
1185 ifa->ifa_dstaddr)->sin_addr.s_addr,
1186 sizeof(struct in_addr));
1187 } else if (n->af == AF_INET6) {
1188 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1189 ifa->ifa_addr)->sin6_addr.s6_addr,
1190 sizeof(struct in6_addr));
1191 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1192 ifa->ifa_netmask)->sin6_addr.s6_addr,
1193 sizeof(struct in6_addr));
1194 if (ifa->ifa_broadaddr != NULL)
1195 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1196 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1197 sizeof(struct in6_addr));
1198 if (ifa->ifa_dstaddr != NULL)
1199 memcpy(&n->peer, &((struct sockaddr_in6 *)
1200 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1201 sizeof(struct in6_addr));
1202 n->ifindex = ((struct sockaddr_in6 *)
1203 ifa->ifa_addr)->sin6_scope_id;
1204 }
1205 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1206 err(1, "ifa_load: strdup");
1207 n->next = NULL;
1208 n->tail = n;
1209 if (h == NULL)
1210 h = n;
1211 else {
1212 h->tail->next = n;
1213 h->tail = n;
1214 }
1215 }
1216
1217 iftab = h;
1218 freeifaddrs(ifap);
1219 }
1220
1221 struct node_host *
ifa_exists(const char * ifa_name)1222 ifa_exists(const char *ifa_name)
1223 {
1224 struct node_host *n;
1225 #ifndef __NetBSD__
1226 struct ifgroupreq ifgr;
1227 int s;
1228 #endif /* !__NetBSD__ */
1229
1230 if (iftab == NULL)
1231 ifa_load();
1232
1233 /* check whether this is a group */
1234 #ifndef __NetBSD__
1235 /* XXXPF TODO investigate what's needed for NetBSD */
1236 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1237 err(1, "socket");
1238 bzero(&ifgr, sizeof(ifgr));
1239 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1240 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1241 /* fake a node_host */
1242 if ((n = calloc(1, sizeof(*n))) == NULL)
1243 err(1, "calloc");
1244 if ((n->ifname = strdup(ifa_name)) == NULL)
1245 err(1, "strdup");
1246 close(s);
1247 return (n);
1248 }
1249 close(s);
1250 #endif /* !__NetBSD__ */
1251
1252 for (n = iftab; n; n = n->next) {
1253 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1254 return (n);
1255 }
1256
1257 return (NULL);
1258 }
1259
1260 struct node_host *
ifa_grouplookup(const char * ifa_name,int flags)1261 ifa_grouplookup(const char *ifa_name, int flags)
1262 {
1263 #ifdef __NetBSD__
1264 /* XXXPF TODO investigate what's needed for NetBSD */
1265
1266 return (NULL);
1267 #else
1268 struct ifg_req *ifg;
1269 struct ifgroupreq ifgr;
1270 int s, len;
1271 struct node_host *n, *h = NULL;
1272
1273 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1274 err(1, "socket");
1275 bzero(&ifgr, sizeof(ifgr));
1276 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1277 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1278 close(s);
1279 return (NULL);
1280 }
1281
1282 len = ifgr.ifgr_len;
1283 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1284 err(1, "calloc");
1285 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1286 err(1, "SIOCGIFGMEMB");
1287
1288 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1289 ifg++) {
1290 len -= sizeof(struct ifg_req);
1291 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1292 continue;
1293 if (h == NULL)
1294 h = n;
1295 else {
1296 h->tail->next = n;
1297 h->tail = n->tail;
1298 }
1299 }
1300 free(ifgr.ifgr_groups);
1301 close(s);
1302
1303 return (h);
1304 #endif /* !__NetBSD__ */
1305 }
1306
1307 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1308 ifa_lookup(const char *ifa_name, int flags)
1309 {
1310 struct node_host *p = NULL, *h = NULL, *n = NULL;
1311 int got4 = 0, got6 = 0;
1312 const char *last_if = NULL;
1313
1314 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1315 return (h);
1316
1317 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1318 ifa_name = NULL;
1319
1320 if (iftab == NULL)
1321 ifa_load();
1322
1323 for (p = iftab; p; p = p->next) {
1324 if (ifa_skip_if(ifa_name, p))
1325 continue;
1326 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1327 continue;
1328 if ((flags & PFI_AFLAG_BROADCAST) &&
1329 !(p->ifa_flags & IFF_BROADCAST))
1330 continue;
1331 if ((flags & PFI_AFLAG_PEER) &&
1332 !(p->ifa_flags & IFF_POINTOPOINT))
1333 continue;
1334 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1335 continue;
1336 if (last_if == NULL || strcmp(last_if, p->ifname))
1337 got4 = got6 = 0;
1338 last_if = p->ifname;
1339 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1340 continue;
1341 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1342 continue;
1343 if (p->af == AF_INET)
1344 got4 = 1;
1345 else
1346 got6 = 1;
1347 n = calloc(1, sizeof(struct node_host));
1348 if (n == NULL)
1349 err(1, "address: calloc");
1350 n->af = p->af;
1351 if (flags & PFI_AFLAG_BROADCAST)
1352 memcpy(&n->addr.v.a.addr, &p->bcast,
1353 sizeof(struct pf_addr));
1354 else if (flags & PFI_AFLAG_PEER)
1355 memcpy(&n->addr.v.a.addr, &p->peer,
1356 sizeof(struct pf_addr));
1357 else
1358 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1359 sizeof(struct pf_addr));
1360 if (flags & PFI_AFLAG_NETWORK)
1361 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1362 else {
1363 if (n->af == AF_INET) {
1364 if (p->ifa_flags & IFF_LOOPBACK &&
1365 p->ifa_flags & IFF_LINK1)
1366 memcpy(&n->addr.v.a.mask,
1367 &p->addr.v.a.mask,
1368 sizeof(struct pf_addr));
1369 else
1370 set_ipmask(n, 32);
1371 } else
1372 set_ipmask(n, 128);
1373 }
1374 n->ifindex = p->ifindex;
1375
1376 n->next = NULL;
1377 n->tail = n;
1378 if (h == NULL)
1379 h = n;
1380 else {
1381 h->tail->next = n;
1382 h->tail = n;
1383 }
1384 }
1385 return (h);
1386 }
1387
1388 int
ifa_skip_if(const char * filter,struct node_host * p)1389 ifa_skip_if(const char *filter, struct node_host *p)
1390 {
1391 int n;
1392
1393 if (p->af != AF_INET && p->af != AF_INET6)
1394 return (1);
1395 if (filter == NULL || !*filter)
1396 return (0);
1397 if (!strcmp(p->ifname, filter))
1398 return (0); /* exact match */
1399 n = strlen(filter);
1400 if (n < 1 || n >= IFNAMSIZ)
1401 return (1); /* sanity check */
1402 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1403 return (1); /* only do exact match in that case */
1404 if (strncmp(p->ifname, filter, n))
1405 return (1); /* prefix doesn't match */
1406 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1407 }
1408
1409
1410 struct node_host *
host(const char * s)1411 host(const char *s)
1412 {
1413 struct node_host *h = NULL;
1414 int mask, v4mask, v6mask, cont = 1;
1415 char *p, *q, *ps;
1416
1417 if ((p = strrchr(s, '/')) != NULL) {
1418 mask = strtol(p+1, &q, 0);
1419 if (!q || *q || mask > 128 || q == (p+1)) {
1420 fprintf(stderr, "invalid netmask '%s'\n", p);
1421 return (NULL);
1422 }
1423 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1424 err(1, "host: malloc");
1425 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1426 v4mask = v6mask = mask;
1427 } else {
1428 if ((ps = strdup(s)) == NULL)
1429 err(1, "host: strdup");
1430 v4mask = 32;
1431 v6mask = 128;
1432 mask = -1;
1433 }
1434
1435 /* interface with this name exists? */
1436 if (cont && (h = host_if(ps, mask)) != NULL)
1437 cont = 0;
1438
1439 /* IPv4 address? */
1440 if (cont && (h = host_v4(s, mask)) != NULL)
1441 cont = 0;
1442
1443 /* IPv6 address? */
1444 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1445 cont = 0;
1446
1447 /* dns lookup */
1448 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1449 cont = 0;
1450 free(ps);
1451
1452 if (h == NULL || cont == 1) {
1453 fprintf(stderr, "no IP address found for %s\n", s);
1454 return (NULL);
1455 }
1456 return (h);
1457 }
1458
1459 struct node_host *
host_if(const char * s,int mask)1460 host_if(const char *s, int mask)
1461 {
1462 struct node_host *n, *h = NULL;
1463 char *p, *ps;
1464 int flags = 0;
1465
1466 if ((ps = strdup(s)) == NULL)
1467 err(1, "host_if: strdup");
1468 while ((p = strrchr(ps, ':')) != NULL) {
1469 if (!strcmp(p+1, "network"))
1470 flags |= PFI_AFLAG_NETWORK;
1471 else if (!strcmp(p+1, "broadcast"))
1472 flags |= PFI_AFLAG_BROADCAST;
1473 else if (!strcmp(p+1, "peer"))
1474 flags |= PFI_AFLAG_PEER;
1475 else if (!strcmp(p+1, "0"))
1476 flags |= PFI_AFLAG_NOALIAS;
1477 else {
1478 free(ps);
1479 return (NULL);
1480 }
1481 *p = '\0';
1482 }
1483 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1484 fprintf(stderr, "illegal combination of interface modifiers\n");
1485 free(ps);
1486 return (NULL);
1487 }
1488 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1489 fprintf(stderr, "network or broadcast lookup, but "
1490 "extra netmask given\n");
1491 free(ps);
1492 return (NULL);
1493 }
1494 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1495 /* interface with this name exists */
1496 h = ifa_lookup(ps, flags);
1497 for (n = h; n != NULL && mask > -1; n = n->next)
1498 set_ipmask(n, mask);
1499 }
1500
1501 free(ps);
1502 return (h);
1503 }
1504
1505 struct node_host *
host_v4(const char * s,int mask)1506 host_v4(const char *s, int mask)
1507 {
1508 struct node_host *h = NULL;
1509 struct in_addr ina;
1510 int bits = 32;
1511
1512 memset(&ina, 0, sizeof(struct in_addr));
1513 if (strrchr(s, '/') != NULL) {
1514 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1515 return (NULL);
1516 } else {
1517 if (inet_pton(AF_INET, s, &ina) != 1)
1518 return (NULL);
1519 }
1520
1521 h = calloc(1, sizeof(struct node_host));
1522 if (h == NULL)
1523 err(1, "address: calloc");
1524 h->ifname = NULL;
1525 h->af = AF_INET;
1526 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1527 set_ipmask(h, bits);
1528 h->next = NULL;
1529 h->tail = h;
1530
1531 return (h);
1532 }
1533
1534 struct node_host *
host_v6(const char * s,int mask)1535 host_v6(const char *s, int mask)
1536 {
1537 struct addrinfo hints, *res;
1538 struct node_host *h = NULL;
1539
1540 memset(&hints, 0, sizeof(hints));
1541 hints.ai_family = AF_INET6;
1542 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1543 hints.ai_flags = AI_NUMERICHOST;
1544 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1545 h = calloc(1, sizeof(struct node_host));
1546 if (h == NULL)
1547 err(1, "address: calloc");
1548 h->ifname = NULL;
1549 h->af = AF_INET6;
1550 memcpy(&h->addr.v.a.addr,
1551 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1552 sizeof(h->addr.v.a.addr));
1553 h->ifindex =
1554 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1555 set_ipmask(h, mask);
1556 freeaddrinfo(res);
1557 h->next = NULL;
1558 h->tail = h;
1559 }
1560
1561 return (h);
1562 }
1563
1564 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1565 host_dns(const char *s, int v4mask, int v6mask)
1566 {
1567 struct addrinfo hints, *res0, *res;
1568 struct node_host *n, *h = NULL;
1569 int error, noalias = 0;
1570 int got4 = 0, got6 = 0;
1571 char *p, *ps;
1572
1573 if ((ps = strdup(s)) == NULL)
1574 err(1, "host_dns: strdup");
1575 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1576 noalias = 1;
1577 *p = '\0';
1578 }
1579 memset(&hints, 0, sizeof(hints));
1580 hints.ai_family = PF_UNSPEC;
1581 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1582 error = getaddrinfo(ps, NULL, &hints, &res0);
1583 if (error) {
1584 free(ps);
1585 return (h);
1586 }
1587
1588 for (res = res0; res; res = res->ai_next) {
1589 if (res->ai_family != AF_INET &&
1590 res->ai_family != AF_INET6)
1591 continue;
1592 if (noalias) {
1593 if (res->ai_family == AF_INET) {
1594 if (got4)
1595 continue;
1596 got4 = 1;
1597 } else {
1598 if (got6)
1599 continue;
1600 got6 = 1;
1601 }
1602 }
1603 n = calloc(1, sizeof(struct node_host));
1604 if (n == NULL)
1605 err(1, "host_dns: calloc");
1606 n->ifname = NULL;
1607 n->af = res->ai_family;
1608 if (res->ai_family == AF_INET) {
1609 memcpy(&n->addr.v.a.addr,
1610 &((struct sockaddr_in *)
1611 res->ai_addr)->sin_addr.s_addr,
1612 sizeof(struct in_addr));
1613 set_ipmask(n, v4mask);
1614 } else {
1615 memcpy(&n->addr.v.a.addr,
1616 &((struct sockaddr_in6 *)
1617 res->ai_addr)->sin6_addr.s6_addr,
1618 sizeof(struct in6_addr));
1619 n->ifindex =
1620 ((struct sockaddr_in6 *)
1621 res->ai_addr)->sin6_scope_id;
1622 set_ipmask(n, v6mask);
1623 }
1624 n->next = NULL;
1625 n->tail = n;
1626 if (h == NULL)
1627 h = n;
1628 else {
1629 h->tail->next = n;
1630 h->tail = n;
1631 }
1632 }
1633 freeaddrinfo(res0);
1634 free(ps);
1635
1636 return (h);
1637 }
1638
1639 /*
1640 * convert a hostname to a list of addresses and put them in the given buffer.
1641 * test:
1642 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1643 */
1644 int
append_addr(struct pfr_buffer * b,char * s,int test)1645 append_addr(struct pfr_buffer *b, char *s, int test)
1646 {
1647 char *r;
1648 struct node_host *h, *n;
1649 int rv, not = 0;
1650
1651 for (r = s; *r == '!'; r++)
1652 not = !not;
1653 if ((n = host(r)) == NULL) {
1654 errno = 0;
1655 return (-1);
1656 }
1657 rv = append_addr_host(b, n, test, not);
1658 do {
1659 h = n;
1660 n = n->next;
1661 free(h);
1662 } while (n != NULL);
1663 return (rv);
1664 }
1665
1666 /*
1667 * same as previous function, but with a pre-parsed input and the ability
1668 * to "negate" the result. Does not free the node_host list.
1669 * not:
1670 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1671 */
1672 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1673 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1674 {
1675 int bits;
1676 struct pfr_addr addr;
1677
1678 do {
1679 bzero(&addr, sizeof(addr));
1680 addr.pfra_not = n->not ^ not;
1681 addr.pfra_af = n->af;
1682 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1683 switch (n->af) {
1684 case AF_INET:
1685 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1686 bits = 32;
1687 break;
1688 case AF_INET6:
1689 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1690 sizeof(struct in6_addr));
1691 bits = 128;
1692 break;
1693 default:
1694 errno = EINVAL;
1695 return (-1);
1696 }
1697 if ((test && (not || addr.pfra_net != bits)) ||
1698 addr.pfra_net > bits) {
1699 errno = EINVAL;
1700 return (-1);
1701 }
1702 if (pfr_buf_add(b, &addr))
1703 return (-1);
1704 } while ((n = n->next) != NULL);
1705
1706 return (0);
1707 }
1708
1709 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)1710 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1711 {
1712 struct pfioc_trans_e trans;
1713
1714 bzero(&trans, sizeof(trans));
1715 trans.rs_num = rs_num;
1716 if (strlcpy(trans.anchor, anchor,
1717 sizeof(trans.anchor)) >= sizeof(trans.anchor))
1718 errx(1, "pfctl_add_trans: strlcpy");
1719
1720 return pfr_buf_add(buf, &trans);
1721 }
1722
1723 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)1724 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1725 {
1726 struct pfioc_trans_e *p;
1727
1728 PFRB_FOREACH(p, buf)
1729 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1730 return (p->ticket);
1731 errx(1, "pfctl_get_ticket: assertion failed");
1732 }
1733
1734 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1735 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1736 {
1737 struct pfioc_trans trans;
1738
1739 bzero(&trans, sizeof(trans));
1740 trans.size = buf->pfrb_size - from;
1741 trans.esize = sizeof(struct pfioc_trans_e);
1742 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1743 return ioctl(dev, cmd, &trans);
1744 }
1745