1 /* $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
2
3 /*
4 * Copyright (c) 2001 Daniel Hartmeier
5 * Copyright (c) 2002,2003 Henning Brauer
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * - Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: stable/9/contrib/pf/pfctl/pfctl_parser.c 223637 2011-06-28 11:57:25Z bz $");
36
37 #include <sys/types.h>
38 #include <sys/ioctl.h>
39 #include <sys/socket.h>
40 #include <sys/param.h>
41 #include <sys/proc.h>
42 #include <net/if.h>
43 #include <netinet/in.h>
44 #include <netinet/in_systm.h>
45 #include <netinet/ip.h>
46 #include <netinet/ip_icmp.h>
47 #include <netinet/icmp6.h>
48 #include <net/pfvar.h>
49 #include <arpa/inet.h>
50
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include <ctype.h>
55 #include <netdb.h>
56 #include <stdarg.h>
57 #include <errno.h>
58 #include <err.h>
59 #include <ifaddrs.h>
60 #include <unistd.h>
61
62 #include "pfctl_parser.h"
63 #include "pfctl.h"
64
65 void print_op (u_int8_t, const char *, const char *);
66 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
67 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
68 void print_flags (u_int8_t);
69 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
70 struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
71 int ifa_skip_if(const char *filter, struct node_host *p);
72
73 struct node_host *ifa_grouplookup(const char *, int);
74 struct node_host *host_if(const char *, int);
75 struct node_host *host_v4(const char *, int);
76 struct node_host *host_v6(const char *, int);
77 struct node_host *host_dns(const char *, int, int);
78
79 const char *tcpflags = "FSRPAUEW";
80
81 static const struct icmptypeent icmp_type[] = {
82 { "echoreq", ICMP_ECHO },
83 { "echorep", ICMP_ECHOREPLY },
84 { "unreach", ICMP_UNREACH },
85 { "squench", ICMP_SOURCEQUENCH },
86 { "redir", ICMP_REDIRECT },
87 { "althost", ICMP_ALTHOSTADDR },
88 { "routeradv", ICMP_ROUTERADVERT },
89 { "routersol", ICMP_ROUTERSOLICIT },
90 { "timex", ICMP_TIMXCEED },
91 { "paramprob", ICMP_PARAMPROB },
92 { "timereq", ICMP_TSTAMP },
93 { "timerep", ICMP_TSTAMPREPLY },
94 { "inforeq", ICMP_IREQ },
95 { "inforep", ICMP_IREQREPLY },
96 { "maskreq", ICMP_MASKREQ },
97 { "maskrep", ICMP_MASKREPLY },
98 { "trace", ICMP_TRACEROUTE },
99 { "dataconv", ICMP_DATACONVERR },
100 { "mobredir", ICMP_MOBILE_REDIRECT },
101 { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
102 { "ipv6-here", ICMP_IPV6_IAMHERE },
103 { "mobregreq", ICMP_MOBILE_REGREQUEST },
104 { "mobregrep", ICMP_MOBILE_REGREPLY },
105 { "skip", ICMP_SKIP },
106 { "photuris", ICMP_PHOTURIS }
107 };
108
109 static const struct icmptypeent icmp6_type[] = {
110 { "unreach", ICMP6_DST_UNREACH },
111 { "toobig", ICMP6_PACKET_TOO_BIG },
112 { "timex", ICMP6_TIME_EXCEEDED },
113 { "paramprob", ICMP6_PARAM_PROB },
114 { "echoreq", ICMP6_ECHO_REQUEST },
115 { "echorep", ICMP6_ECHO_REPLY },
116 { "groupqry", ICMP6_MEMBERSHIP_QUERY },
117 { "listqry", MLD_LISTENER_QUERY },
118 { "grouprep", ICMP6_MEMBERSHIP_REPORT },
119 { "listenrep", MLD_LISTENER_REPORT },
120 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION },
121 { "listendone", MLD_LISTENER_DONE },
122 { "routersol", ND_ROUTER_SOLICIT },
123 { "routeradv", ND_ROUTER_ADVERT },
124 { "neighbrsol", ND_NEIGHBOR_SOLICIT },
125 { "neighbradv", ND_NEIGHBOR_ADVERT },
126 { "redir", ND_REDIRECT },
127 { "routrrenum", ICMP6_ROUTER_RENUMBERING },
128 { "wrureq", ICMP6_WRUREQUEST },
129 { "wrurep", ICMP6_WRUREPLY },
130 { "fqdnreq", ICMP6_FQDN_QUERY },
131 { "fqdnrep", ICMP6_FQDN_REPLY },
132 { "niqry", ICMP6_NI_QUERY },
133 { "nirep", ICMP6_NI_REPLY },
134 { "mtraceresp", MLD_MTRACE_RESP },
135 { "mtrace", MLD_MTRACE }
136 };
137
138 static const struct icmpcodeent icmp_code[] = {
139 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
140 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
141 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
142 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
143 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
144 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
145 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
146 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
147 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
148 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
149 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
150 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
151 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
152 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
153 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
154 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
155 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
156 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
157 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
158 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
159 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
160 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
161 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
162 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
163 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
164 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
165 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
166 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
167 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
168 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
169 };
170
171 static const struct icmpcodeent icmp6_code[] = {
172 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
173 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
174 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
175 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
176 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
177 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
178 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
179 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
180 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
181 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
182 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
183 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
184 };
185
186 const struct pf_timeout pf_timeouts[] = {
187 { "tcp.first", PFTM_TCP_FIRST_PACKET },
188 { "tcp.opening", PFTM_TCP_OPENING },
189 { "tcp.established", PFTM_TCP_ESTABLISHED },
190 { "tcp.closing", PFTM_TCP_CLOSING },
191 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
192 { "tcp.closed", PFTM_TCP_CLOSED },
193 { "tcp.tsdiff", PFTM_TS_DIFF },
194 { "udp.first", PFTM_UDP_FIRST_PACKET },
195 { "udp.single", PFTM_UDP_SINGLE },
196 { "udp.multiple", PFTM_UDP_MULTIPLE },
197 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
198 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
199 { "other.first", PFTM_OTHER_FIRST_PACKET },
200 { "other.single", PFTM_OTHER_SINGLE },
201 { "other.multiple", PFTM_OTHER_MULTIPLE },
202 { "frag", PFTM_FRAG },
203 { "interval", PFTM_INTERVAL },
204 { "adaptive.start", PFTM_ADAPTIVE_START },
205 { "adaptive.end", PFTM_ADAPTIVE_END },
206 { "src.track", PFTM_SRC_NODE },
207 { NULL, 0 }
208 };
209
210 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)211 geticmptypebynumber(u_int8_t type, sa_family_t af)
212 {
213 unsigned int i;
214
215 if (af != AF_INET6) {
216 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
217 i++) {
218 if (type == icmp_type[i].type)
219 return (&icmp_type[i]);
220 }
221 } else {
222 for (i=0; i < (sizeof (icmp6_type) /
223 sizeof(icmp6_type[0])); i++) {
224 if (type == icmp6_type[i].type)
225 return (&icmp6_type[i]);
226 }
227 }
228 return (NULL);
229 }
230
231 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)232 geticmptypebyname(char *w, sa_family_t af)
233 {
234 unsigned int i;
235
236 if (af != AF_INET6) {
237 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
238 i++) {
239 if (!strcmp(w, icmp_type[i].name))
240 return (&icmp_type[i]);
241 }
242 } else {
243 for (i=0; i < (sizeof (icmp6_type) /
244 sizeof(icmp6_type[0])); i++) {
245 if (!strcmp(w, icmp6_type[i].name))
246 return (&icmp6_type[i]);
247 }
248 }
249 return (NULL);
250 }
251
252 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)253 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
254 {
255 unsigned int i;
256
257 if (af != AF_INET6) {
258 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
259 i++) {
260 if (type == icmp_code[i].type &&
261 code == icmp_code[i].code)
262 return (&icmp_code[i]);
263 }
264 } else {
265 for (i=0; i < (sizeof (icmp6_code) /
266 sizeof(icmp6_code[0])); i++) {
267 if (type == icmp6_code[i].type &&
268 code == icmp6_code[i].code)
269 return (&icmp6_code[i]);
270 }
271 }
272 return (NULL);
273 }
274
275 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)276 geticmpcodebyname(u_long type, char *w, sa_family_t af)
277 {
278 unsigned int i;
279
280 if (af != AF_INET6) {
281 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
282 i++) {
283 if (type == icmp_code[i].type &&
284 !strcmp(w, icmp_code[i].name))
285 return (&icmp_code[i]);
286 }
287 } else {
288 for (i=0; i < (sizeof (icmp6_code) /
289 sizeof(icmp6_code[0])); i++) {
290 if (type == icmp6_code[i].type &&
291 !strcmp(w, icmp6_code[i].name))
292 return (&icmp6_code[i]);
293 }
294 }
295 return (NULL);
296 }
297
298 void
print_op(u_int8_t op,const char * a1,const char * a2)299 print_op(u_int8_t op, const char *a1, const char *a2)
300 {
301 if (op == PF_OP_IRG)
302 printf(" %s >< %s", a1, a2);
303 else if (op == PF_OP_XRG)
304 printf(" %s <> %s", a1, a2);
305 else if (op == PF_OP_EQ)
306 printf(" = %s", a1);
307 else if (op == PF_OP_NE)
308 printf(" != %s", a1);
309 else if (op == PF_OP_LT)
310 printf(" < %s", a1);
311 else if (op == PF_OP_LE)
312 printf(" <= %s", a1);
313 else if (op == PF_OP_GT)
314 printf(" > %s", a1);
315 else if (op == PF_OP_GE)
316 printf(" >= %s", a1);
317 else if (op == PF_OP_RRG)
318 printf(" %s:%s", a1, a2);
319 }
320
321 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto,int numeric)322 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
323 {
324 char a1[6], a2[6];
325 struct servent *s;
326
327 if (!numeric)
328 s = getservbyport(p1, proto);
329 else
330 s = NULL;
331 p1 = ntohs(p1);
332 p2 = ntohs(p2);
333 snprintf(a1, sizeof(a1), "%u", p1);
334 snprintf(a2, sizeof(a2), "%u", p2);
335 printf(" port");
336 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
337 print_op(op, s->s_name, a2);
338 else
339 print_op(op, a1, a2);
340 }
341
342 void
print_ugid(u_int8_t op,unsigned u1,unsigned u2,const char * t,unsigned umax)343 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
344 {
345 char a1[11], a2[11];
346
347 snprintf(a1, sizeof(a1), "%u", u1);
348 snprintf(a2, sizeof(a2), "%u", u2);
349 printf(" %s", t);
350 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
351 print_op(op, "unknown", a2);
352 else
353 print_op(op, a1, a2);
354 }
355
356 void
print_flags(u_int8_t f)357 print_flags(u_int8_t f)
358 {
359 int i;
360
361 for (i = 0; tcpflags[i]; ++i)
362 if (f & (1 << i))
363 printf("%c", tcpflags[i]);
364 }
365
366 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,int numeric)367 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
368 sa_family_t af, u_int8_t proto, int verbose, int numeric)
369 {
370 char buf[PF_OSFP_LEN*3];
371 if (src->addr.type == PF_ADDR_ADDRMASK &&
372 dst->addr.type == PF_ADDR_ADDRMASK &&
373 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
374 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
375 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
376 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
377 !src->neg && !dst->neg &&
378 !src->port_op && !dst->port_op &&
379 osfp == PF_OSFP_ANY)
380 printf(" all");
381 else {
382 printf(" from ");
383 if (src->neg)
384 printf("! ");
385 print_addr(&src->addr, af, verbose);
386 if (src->port_op)
387 print_port(src->port_op, src->port[0],
388 src->port[1],
389 proto == IPPROTO_TCP ? "tcp" : "udp",
390 numeric);
391 if (osfp != PF_OSFP_ANY)
392 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
393 sizeof(buf)));
394
395 printf(" to ");
396 if (dst->neg)
397 printf("! ");
398 print_addr(&dst->addr, af, verbose);
399 if (dst->port_op)
400 print_port(dst->port_op, dst->port[0],
401 dst->port[1],
402 proto == IPPROTO_TCP ? "tcp" : "udp",
403 numeric);
404 }
405 }
406
407 void
print_pool(struct pf_pool * pool,u_int16_t p1,u_int16_t p2,sa_family_t af,int id)408 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
409 sa_family_t af, int id)
410 {
411 struct pf_pooladdr *pooladdr;
412
413 if ((TAILQ_FIRST(&pool->list) != NULL) &&
414 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
415 printf("{ ");
416 TAILQ_FOREACH(pooladdr, &pool->list, entries){
417 switch (id) {
418 case PF_NAT:
419 case PF_RDR:
420 case PF_BINAT:
421 print_addr(&pooladdr->addr, af, 0);
422 break;
423 case PF_PASS:
424 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
425 printf("%s", pooladdr->ifname);
426 else {
427 printf("(%s ", pooladdr->ifname);
428 print_addr(&pooladdr->addr, af, 0);
429 printf(")");
430 }
431 break;
432 default:
433 break;
434 }
435 if (TAILQ_NEXT(pooladdr, entries) != NULL)
436 printf(", ");
437 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
438 printf(" }");
439 }
440 switch (id) {
441 case PF_NAT:
442 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
443 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
444 if (p1 == p2)
445 printf(" port %u", p1);
446 else
447 printf(" port %u:%u", p1, p2);
448 }
449 break;
450 case PF_RDR:
451 if (p1) {
452 printf(" port %u", p1);
453 if (p2 && (p2 != p1))
454 printf(":%u", p2);
455 }
456 break;
457 default:
458 break;
459 }
460 switch (pool->opts & PF_POOL_TYPEMASK) {
461 case PF_POOL_NONE:
462 break;
463 case PF_POOL_BITMASK:
464 printf(" bitmask");
465 break;
466 case PF_POOL_RANDOM:
467 printf(" random");
468 break;
469 case PF_POOL_SRCHASH:
470 printf(" source-hash 0x%08x%08x%08x%08x",
471 pool->key.key32[0], pool->key.key32[1],
472 pool->key.key32[2], pool->key.key32[3]);
473 break;
474 case PF_POOL_ROUNDROBIN:
475 printf(" round-robin");
476 break;
477 }
478 if (pool->opts & PF_POOL_STICKYADDR)
479 printf(" sticky-address");
480 if (id == PF_NAT && p1 == 0 && p2 == 0)
481 printf(" static-port");
482 }
483
484 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
485 const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
486 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
487 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
488
489 void
print_status(struct pf_status * s,int opts)490 print_status(struct pf_status *s, int opts)
491 {
492 char statline[80], *running;
493 time_t runtime;
494 int i;
495 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
496 static const char hex[] = "0123456789abcdef";
497
498 runtime = time(NULL) - s->since;
499 running = s->running ? "Enabled" : "Disabled";
500
501 if (s->since) {
502 unsigned int sec, min, hrs, day = runtime;
503
504 sec = day % 60;
505 day /= 60;
506 min = day % 60;
507 day /= 60;
508 hrs = day % 24;
509 day /= 24;
510 snprintf(statline, sizeof(statline),
511 "Status: %s for %u days %.2u:%.2u:%.2u",
512 running, day, hrs, min, sec);
513 } else
514 snprintf(statline, sizeof(statline), "Status: %s", running);
515 printf("%-44s", statline);
516 switch (s->debug) {
517 case PF_DEBUG_NONE:
518 printf("%15s\n\n", "Debug: None");
519 break;
520 case PF_DEBUG_URGENT:
521 printf("%15s\n\n", "Debug: Urgent");
522 break;
523 case PF_DEBUG_MISC:
524 printf("%15s\n\n", "Debug: Misc");
525 break;
526 case PF_DEBUG_NOISY:
527 printf("%15s\n\n", "Debug: Loud");
528 break;
529 }
530
531 if (opts & PF_OPT_VERBOSE) {
532 printf("Hostid: 0x%08x\n", ntohl(s->hostid));
533
534 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
535 buf[i + i] = hex[s->pf_chksum[i] >> 4];
536 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
537 }
538 buf[i + i] = '\0';
539 printf("Checksum: 0x%s\n\n", buf);
540 }
541
542 if (s->ifname[0] != 0) {
543 printf("Interface Stats for %-16s %5s %16s\n",
544 s->ifname, "IPv4", "IPv6");
545 printf(" %-25s %14llu %16llu\n", "Bytes In",
546 (unsigned long long)s->bcounters[0][0],
547 (unsigned long long)s->bcounters[1][0]);
548 printf(" %-25s %14llu %16llu\n", "Bytes Out",
549 (unsigned long long)s->bcounters[0][1],
550 (unsigned long long)s->bcounters[1][1]);
551 printf(" Packets In\n");
552 printf(" %-23s %14llu %16llu\n", "Passed",
553 (unsigned long long)s->pcounters[0][0][PF_PASS],
554 (unsigned long long)s->pcounters[1][0][PF_PASS]);
555 printf(" %-23s %14llu %16llu\n", "Blocked",
556 (unsigned long long)s->pcounters[0][0][PF_DROP],
557 (unsigned long long)s->pcounters[1][0][PF_DROP]);
558 printf(" Packets Out\n");
559 printf(" %-23s %14llu %16llu\n", "Passed",
560 (unsigned long long)s->pcounters[0][1][PF_PASS],
561 (unsigned long long)s->pcounters[1][1][PF_PASS]);
562 printf(" %-23s %14llu %16llu\n\n", "Blocked",
563 (unsigned long long)s->pcounters[0][1][PF_DROP],
564 (unsigned long long)s->pcounters[1][1][PF_DROP]);
565 }
566 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
567 printf(" %-25s %14u %14s\n", "current entries", s->states, "");
568 for (i = 0; i < FCNT_MAX; i++) {
569 printf(" %-25s %14llu ", pf_fcounters[i],
570 (unsigned long long)s->fcounters[i]);
571 if (runtime > 0)
572 printf("%14.1f/s\n",
573 (double)s->fcounters[i] / (double)runtime);
574 else
575 printf("%14s\n", "");
576 }
577 if (opts & PF_OPT_VERBOSE) {
578 printf("Source Tracking Table\n");
579 printf(" %-25s %14u %14s\n", "current entries",
580 s->src_nodes, "");
581 for (i = 0; i < SCNT_MAX; i++) {
582 printf(" %-25s %14lld ", pf_scounters[i],
583 #ifdef __FreeBSD__
584 (long long)s->scounters[i]);
585 #else
586 s->scounters[i]);
587 #endif
588 if (runtime > 0)
589 printf("%14.1f/s\n",
590 (double)s->scounters[i] / (double)runtime);
591 else
592 printf("%14s\n", "");
593 }
594 }
595 printf("Counters\n");
596 for (i = 0; i < PFRES_MAX; i++) {
597 printf(" %-25s %14llu ", pf_reasons[i],
598 (unsigned long long)s->counters[i]);
599 if (runtime > 0)
600 printf("%14.1f/s\n",
601 (double)s->counters[i] / (double)runtime);
602 else
603 printf("%14s\n", "");
604 }
605 if (opts & PF_OPT_VERBOSE) {
606 printf("Limit Counters\n");
607 for (i = 0; i < LCNT_MAX; i++) {
608 printf(" %-25s %14lld ", pf_lcounters[i],
609 #ifdef __FreeBSD__
610 (unsigned long long)s->lcounters[i]);
611 #else
612 s->lcounters[i]);
613 #endif
614 if (runtime > 0)
615 printf("%14.1f/s\n",
616 (double)s->lcounters[i] / (double)runtime);
617 else
618 printf("%14s\n", "");
619 }
620 }
621 }
622
623 void
print_src_node(struct pf_src_node * sn,int opts)624 print_src_node(struct pf_src_node *sn, int opts)
625 {
626 struct pf_addr_wrap aw;
627 int min, sec;
628
629 memset(&aw, 0, sizeof(aw));
630 if (sn->af == AF_INET)
631 aw.v.a.mask.addr32[0] = 0xffffffff;
632 else
633 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
634
635 aw.v.a.addr = sn->addr;
636 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
637 printf(" -> ");
638 aw.v.a.addr = sn->raddr;
639 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
640 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
641 sn->conn, sn->conn_rate.count / 1000,
642 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
643 if (opts & PF_OPT_VERBOSE) {
644 sec = sn->creation % 60;
645 sn->creation /= 60;
646 min = sn->creation % 60;
647 sn->creation /= 60;
648 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
649 if (sn->states == 0) {
650 sec = sn->expire % 60;
651 sn->expire /= 60;
652 min = sn->expire % 60;
653 sn->expire /= 60;
654 printf(", expires in %.2u:%.2u:%.2u",
655 sn->expire, min, sec);
656 }
657 printf(", %llu pkts, %llu bytes",
658 #ifdef __FreeBSD__
659 (unsigned long long)(sn->packets[0] + sn->packets[1]),
660 (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
661 #else
662 sn->packets[0] + sn->packets[1],
663 sn->bytes[0] + sn->bytes[1]);
664 #endif
665 switch (sn->ruletype) {
666 case PF_NAT:
667 if (sn->rule.nr != -1)
668 printf(", nat rule %u", sn->rule.nr);
669 break;
670 case PF_RDR:
671 if (sn->rule.nr != -1)
672 printf(", rdr rule %u", sn->rule.nr);
673 break;
674 case PF_PASS:
675 if (sn->rule.nr != -1)
676 printf(", filter rule %u", sn->rule.nr);
677 break;
678 }
679 printf("\n");
680 }
681 }
682
683 void
print_rule(struct pf_rule * r,const char * anchor_call,int verbose,int numeric)684 print_rule(struct pf_rule *r, const char *anchor_call, int verbose, int numeric)
685 {
686 static const char *actiontypes[] = { "pass", "block", "scrub",
687 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
688 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
689 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
690 "binat-anchor", "rdr-anchor", "rdr-anchor" };
691 int i, opts;
692
693 if (verbose)
694 printf("@%d ", r->nr);
695 if (r->action > PF_NORDR)
696 printf("action(%d)", r->action);
697 else if (anchor_call[0]) {
698 if (anchor_call[0] == '_') {
699 printf("%s", anchortypes[r->action]);
700 } else
701 printf("%s \"%s\"", anchortypes[r->action],
702 anchor_call);
703 } else {
704 printf("%s", actiontypes[r->action]);
705 if (r->natpass)
706 printf(" pass");
707 }
708 if (r->action == PF_DROP) {
709 if (r->rule_flag & PFRULE_RETURN)
710 printf(" return");
711 else if (r->rule_flag & PFRULE_RETURNRST) {
712 if (!r->return_ttl)
713 printf(" return-rst");
714 else
715 printf(" return-rst(ttl %d)", r->return_ttl);
716 } else if (r->rule_flag & PFRULE_RETURNICMP) {
717 const struct icmpcodeent *ic, *ic6;
718
719 ic = geticmpcodebynumber(r->return_icmp >> 8,
720 r->return_icmp & 255, AF_INET);
721 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
722 r->return_icmp6 & 255, AF_INET6);
723
724 switch (r->af) {
725 case AF_INET:
726 printf(" return-icmp");
727 if (ic == NULL)
728 printf("(%u)", r->return_icmp & 255);
729 else
730 printf("(%s)", ic->name);
731 break;
732 case AF_INET6:
733 printf(" return-icmp6");
734 if (ic6 == NULL)
735 printf("(%u)", r->return_icmp6 & 255);
736 else
737 printf("(%s)", ic6->name);
738 break;
739 default:
740 printf(" return-icmp");
741 if (ic == NULL)
742 printf("(%u, ", r->return_icmp & 255);
743 else
744 printf("(%s, ", ic->name);
745 if (ic6 == NULL)
746 printf("%u)", r->return_icmp6 & 255);
747 else
748 printf("%s)", ic6->name);
749 break;
750 }
751 } else
752 printf(" drop");
753 }
754 if (r->direction == PF_IN)
755 printf(" in");
756 else if (r->direction == PF_OUT)
757 printf(" out");
758 if (r->log) {
759 printf(" log");
760 if (r->log & ~PF_LOG || r->logif) {
761 int count = 0;
762
763 printf(" (");
764 if (r->log & PF_LOG_ALL)
765 printf("%sall", count++ ? ", " : "");
766 if (r->log & PF_LOG_SOCKET_LOOKUP)
767 printf("%suser", count++ ? ", " : "");
768 if (r->logif)
769 printf("%sto pflog%u", count++ ? ", " : "",
770 r->logif);
771 printf(")");
772 }
773 }
774 if (r->quick)
775 printf(" quick");
776 if (r->ifname[0]) {
777 if (r->ifnot)
778 printf(" on ! %s", r->ifname);
779 else
780 printf(" on %s", r->ifname);
781 }
782 if (r->rt) {
783 if (r->rt == PF_ROUTETO)
784 printf(" route-to");
785 else if (r->rt == PF_REPLYTO)
786 printf(" reply-to");
787 else if (r->rt == PF_DUPTO)
788 printf(" dup-to");
789 else if (r->rt == PF_FASTROUTE)
790 printf(" fastroute");
791 if (r->rt != PF_FASTROUTE) {
792 printf(" ");
793 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
794 }
795 }
796 if (r->af) {
797 if (r->af == AF_INET)
798 printf(" inet");
799 else
800 printf(" inet6");
801 }
802 if (r->proto) {
803 struct protoent *p;
804
805 if ((p = getprotobynumber(r->proto)) != NULL)
806 printf(" proto %s", p->p_name);
807 else
808 printf(" proto %u", r->proto);
809 }
810 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
811 verbose, numeric);
812 if (r->uid.op)
813 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
814 UID_MAX);
815 if (r->gid.op)
816 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
817 GID_MAX);
818 if (r->flags || r->flagset) {
819 printf(" flags ");
820 print_flags(r->flags);
821 printf("/");
822 print_flags(r->flagset);
823 } else if (r->action == PF_PASS &&
824 (!r->proto || r->proto == IPPROTO_TCP) &&
825 !(r->rule_flag & PFRULE_FRAGMENT) &&
826 !anchor_call[0] && r->keep_state)
827 printf(" flags any");
828 if (r->type) {
829 const struct icmptypeent *it;
830
831 it = geticmptypebynumber(r->type-1, r->af);
832 if (r->af != AF_INET6)
833 printf(" icmp-type");
834 else
835 printf(" icmp6-type");
836 if (it != NULL)
837 printf(" %s", it->name);
838 else
839 printf(" %u", r->type-1);
840 if (r->code) {
841 const struct icmpcodeent *ic;
842
843 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
844 if (ic != NULL)
845 printf(" code %s", ic->name);
846 else
847 printf(" code %u", r->code-1);
848 }
849 }
850 if (r->tos)
851 printf(" tos 0x%2.2x", r->tos);
852 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
853 printf(" no state");
854 else if (r->keep_state == PF_STATE_NORMAL)
855 printf(" keep state");
856 else if (r->keep_state == PF_STATE_MODULATE)
857 printf(" modulate state");
858 else if (r->keep_state == PF_STATE_SYNPROXY)
859 printf(" synproxy state");
860 if (r->prob) {
861 char buf[20];
862
863 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
864 for (i = strlen(buf)-1; i > 0; i--) {
865 if (buf[i] == '0')
866 buf[i] = '\0';
867 else {
868 if (buf[i] == '.')
869 buf[i] = '\0';
870 break;
871 }
872 }
873 printf(" probability %s%%", buf);
874 }
875 opts = 0;
876 if (r->max_states || r->max_src_nodes || r->max_src_states)
877 opts = 1;
878 if (r->rule_flag & PFRULE_NOSYNC)
879 opts = 1;
880 if (r->rule_flag & PFRULE_SRCTRACK)
881 opts = 1;
882 if (r->rule_flag & PFRULE_IFBOUND)
883 opts = 1;
884 if (r->rule_flag & PFRULE_STATESLOPPY)
885 opts = 1;
886 for (i = 0; !opts && i < PFTM_MAX; ++i)
887 if (r->timeout[i])
888 opts = 1;
889 if (opts) {
890 printf(" (");
891 if (r->max_states) {
892 printf("max %u", r->max_states);
893 opts = 0;
894 }
895 if (r->rule_flag & PFRULE_NOSYNC) {
896 if (!opts)
897 printf(", ");
898 printf("no-sync");
899 opts = 0;
900 }
901 if (r->rule_flag & PFRULE_SRCTRACK) {
902 if (!opts)
903 printf(", ");
904 printf("source-track");
905 if (r->rule_flag & PFRULE_RULESRCTRACK)
906 printf(" rule");
907 else
908 printf(" global");
909 opts = 0;
910 }
911 if (r->max_src_states) {
912 if (!opts)
913 printf(", ");
914 printf("max-src-states %u", r->max_src_states);
915 opts = 0;
916 }
917 if (r->max_src_conn) {
918 if (!opts)
919 printf(", ");
920 printf("max-src-conn %u", r->max_src_conn);
921 opts = 0;
922 }
923 if (r->max_src_conn_rate.limit) {
924 if (!opts)
925 printf(", ");
926 printf("max-src-conn-rate %u/%u",
927 r->max_src_conn_rate.limit,
928 r->max_src_conn_rate.seconds);
929 opts = 0;
930 }
931 if (r->max_src_nodes) {
932 if (!opts)
933 printf(", ");
934 printf("max-src-nodes %u", r->max_src_nodes);
935 opts = 0;
936 }
937 if (r->overload_tblname[0]) {
938 if (!opts)
939 printf(", ");
940 printf("overload <%s>", r->overload_tblname);
941 if (r->flush)
942 printf(" flush");
943 if (r->flush & PF_FLUSH_GLOBAL)
944 printf(" global");
945 }
946 if (r->rule_flag & PFRULE_IFBOUND) {
947 if (!opts)
948 printf(", ");
949 printf("if-bound");
950 opts = 0;
951 }
952 if (r->rule_flag & PFRULE_STATESLOPPY) {
953 if (!opts)
954 printf(", ");
955 printf("sloppy");
956 opts = 0;
957 }
958 if (r->rule_flag & PFRULE_PFLOW) {
959 if (!opts)
960 printf(", ");
961 printf("pflow");
962 opts = 0;
963 }
964 for (i = 0; i < PFTM_MAX; ++i)
965 if (r->timeout[i]) {
966 int j;
967
968 if (!opts)
969 printf(", ");
970 opts = 0;
971 for (j = 0; pf_timeouts[j].name != NULL;
972 ++j)
973 if (pf_timeouts[j].timeout == i)
974 break;
975 printf("%s %u", pf_timeouts[j].name == NULL ?
976 "inv.timeout" : pf_timeouts[j].name,
977 r->timeout[i]);
978 }
979 printf(")");
980 }
981 if (r->rule_flag & PFRULE_FRAGMENT)
982 printf(" fragment");
983 if (r->rule_flag & PFRULE_NODF)
984 printf(" no-df");
985 if (r->rule_flag & PFRULE_RANDOMID)
986 printf(" random-id");
987 if (r->min_ttl)
988 printf(" min-ttl %d", r->min_ttl);
989 if (r->max_mss)
990 printf(" max-mss %d", r->max_mss);
991 if (r->rule_flag & PFRULE_SET_TOS)
992 printf(" set-tos 0x%2.2x", r->set_tos);
993 if (r->allow_opts)
994 printf(" allow-opts");
995 if (r->action == PF_SCRUB) {
996 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
997 printf(" reassemble tcp");
998
999 if (r->rule_flag & PFRULE_FRAGDROP)
1000 printf(" fragment drop-ovl");
1001 else if (r->rule_flag & PFRULE_FRAGCROP)
1002 printf(" fragment crop");
1003 else
1004 printf(" fragment reassemble");
1005 }
1006 if (r->label[0])
1007 printf(" label \"%s\"", r->label);
1008 if (r->qname[0] && r->pqname[0])
1009 printf(" queue(%s, %s)", r->qname, r->pqname);
1010 else if (r->qname[0])
1011 printf(" queue %s", r->qname);
1012 if (r->tagname[0])
1013 printf(" tag %s", r->tagname);
1014 if (r->match_tagname[0]) {
1015 if (r->match_tag_not)
1016 printf(" !");
1017 printf(" tagged %s", r->match_tagname);
1018 }
1019 if (r->rtableid != -1)
1020 printf(" rtable %u", r->rtableid);
1021 if (r->divert.port) {
1022 #ifdef __FreeBSD__
1023 printf(" divert-to %u", ntohs(r->divert.port));
1024 #else
1025 if (PF_AZERO(&r->divert.addr, r->af)) {
1026 printf(" divert-reply");
1027 } else {
1028 /* XXX cut&paste from print_addr */
1029 char buf[48];
1030
1031 printf(" divert-to ");
1032 if (inet_ntop(r->af, &r->divert.addr, buf,
1033 sizeof(buf)) == NULL)
1034 printf("?");
1035 else
1036 printf("%s", buf);
1037 printf(" port %u", ntohs(r->divert.port));
1038 }
1039 #endif
1040 }
1041 if (!anchor_call[0] && (r->action == PF_NAT ||
1042 r->action == PF_BINAT || r->action == PF_RDR)) {
1043 printf(" -> ");
1044 print_pool(&r->rpool, r->rpool.proxy_port[0],
1045 r->rpool.proxy_port[1], r->af, r->action);
1046 }
1047 }
1048
1049 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1050 print_tabledef(const char *name, int flags, int addrs,
1051 struct node_tinithead *nodes)
1052 {
1053 struct node_tinit *ti, *nti;
1054 struct node_host *h;
1055
1056 printf("table <%s>", name);
1057 if (flags & PFR_TFLAG_CONST)
1058 printf(" const");
1059 if (flags & PFR_TFLAG_PERSIST)
1060 printf(" persist");
1061 if (flags & PFR_TFLAG_COUNTERS)
1062 printf(" counters");
1063 SIMPLEQ_FOREACH(ti, nodes, entries) {
1064 if (ti->file) {
1065 printf(" file \"%s\"", ti->file);
1066 continue;
1067 }
1068 printf(" {");
1069 for (;;) {
1070 for (h = ti->host; h != NULL; h = h->next) {
1071 printf(h->not ? " !" : " ");
1072 print_addr(&h->addr, h->af, 0);
1073 }
1074 nti = SIMPLEQ_NEXT(ti, entries);
1075 if (nti != NULL && nti->file == NULL)
1076 ti = nti; /* merge lists */
1077 else
1078 break;
1079 }
1080 printf(" }");
1081 }
1082 if (addrs && SIMPLEQ_EMPTY(nodes))
1083 printf(" { }");
1084 printf("\n");
1085 }
1086
1087 int
parse_flags(char * s)1088 parse_flags(char *s)
1089 {
1090 char *p, *q;
1091 u_int8_t f = 0;
1092
1093 for (p = s; *p; p++) {
1094 if ((q = strchr(tcpflags, *p)) == NULL)
1095 return -1;
1096 else
1097 f |= 1 << (q - tcpflags);
1098 }
1099 return (f ? f : PF_TH_ALL);
1100 }
1101
1102 void
set_ipmask(struct node_host * h,u_int8_t b)1103 set_ipmask(struct node_host *h, u_int8_t b)
1104 {
1105 struct pf_addr *m, *n;
1106 int i, j = 0;
1107
1108 m = &h->addr.v.a.mask;
1109 memset(m, 0, sizeof(*m));
1110
1111 while (b >= 32) {
1112 m->addr32[j++] = 0xffffffff;
1113 b -= 32;
1114 }
1115 for (i = 31; i > 31-b; --i)
1116 m->addr32[j] |= (1 << i);
1117 if (b)
1118 m->addr32[j] = htonl(m->addr32[j]);
1119
1120 /* Mask off bits of the address that will never be used. */
1121 n = &h->addr.v.a.addr;
1122 if (h->addr.type == PF_ADDR_ADDRMASK)
1123 for (i = 0; i < 4; i++)
1124 n->addr32[i] = n->addr32[i] & m->addr32[i];
1125 }
1126
1127 int
check_netmask(struct node_host * h,sa_family_t af)1128 check_netmask(struct node_host *h, sa_family_t af)
1129 {
1130 struct node_host *n = NULL;
1131 struct pf_addr *m;
1132
1133 for (n = h; n != NULL; n = n->next) {
1134 if (h->addr.type == PF_ADDR_TABLE)
1135 continue;
1136 m = &h->addr.v.a.mask;
1137 /* fix up netmask for dynaddr */
1138 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1139 unmask(m, AF_INET6) > 32)
1140 set_ipmask(n, 32);
1141 /* netmasks > 32 bit are invalid on v4 */
1142 if (af == AF_INET &&
1143 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1144 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1145 unmask(m, AF_INET6));
1146 return (1);
1147 }
1148 }
1149 return (0);
1150 }
1151
1152 /* interface lookup routines */
1153
1154 struct node_host *iftab;
1155
1156 void
ifa_load(void)1157 ifa_load(void)
1158 {
1159 struct ifaddrs *ifap, *ifa;
1160 struct node_host *n = NULL, *h = NULL;
1161
1162 if (getifaddrs(&ifap) < 0)
1163 err(1, "getifaddrs");
1164
1165 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1166 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1167 ifa->ifa_addr->sa_family == AF_INET6 ||
1168 ifa->ifa_addr->sa_family == AF_LINK))
1169 continue;
1170 n = calloc(1, sizeof(struct node_host));
1171 if (n == NULL)
1172 err(1, "address: calloc");
1173 n->af = ifa->ifa_addr->sa_family;
1174 n->ifa_flags = ifa->ifa_flags;
1175 #ifdef __KAME__
1176 if (n->af == AF_INET6 &&
1177 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1178 ifa->ifa_addr)->sin6_addr) &&
1179 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1180 0) {
1181 struct sockaddr_in6 *sin6;
1182
1183 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1184 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1185 sin6->sin6_addr.s6_addr[3];
1186 sin6->sin6_addr.s6_addr[2] = 0;
1187 sin6->sin6_addr.s6_addr[3] = 0;
1188 }
1189 #endif
1190 n->ifindex = 0;
1191 if (n->af == AF_INET) {
1192 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1193 ifa->ifa_addr)->sin_addr.s_addr,
1194 sizeof(struct in_addr));
1195 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1196 ifa->ifa_netmask)->sin_addr.s_addr,
1197 sizeof(struct in_addr));
1198 if (ifa->ifa_broadaddr != NULL)
1199 memcpy(&n->bcast, &((struct sockaddr_in *)
1200 ifa->ifa_broadaddr)->sin_addr.s_addr,
1201 sizeof(struct in_addr));
1202 if (ifa->ifa_dstaddr != NULL)
1203 memcpy(&n->peer, &((struct sockaddr_in *)
1204 ifa->ifa_dstaddr)->sin_addr.s_addr,
1205 sizeof(struct in_addr));
1206 } else if (n->af == AF_INET6) {
1207 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1208 ifa->ifa_addr)->sin6_addr.s6_addr,
1209 sizeof(struct in6_addr));
1210 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1211 ifa->ifa_netmask)->sin6_addr.s6_addr,
1212 sizeof(struct in6_addr));
1213 if (ifa->ifa_broadaddr != NULL)
1214 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1215 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1216 sizeof(struct in6_addr));
1217 if (ifa->ifa_dstaddr != NULL)
1218 memcpy(&n->peer, &((struct sockaddr_in6 *)
1219 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1220 sizeof(struct in6_addr));
1221 n->ifindex = ((struct sockaddr_in6 *)
1222 ifa->ifa_addr)->sin6_scope_id;
1223 }
1224 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1225 err(1, "ifa_load: strdup");
1226 n->next = NULL;
1227 n->tail = n;
1228 if (h == NULL)
1229 h = n;
1230 else {
1231 h->tail->next = n;
1232 h->tail = n;
1233 }
1234 }
1235
1236 iftab = h;
1237 freeifaddrs(ifap);
1238 }
1239
1240 struct node_host *
ifa_exists(const char * ifa_name)1241 ifa_exists(const char *ifa_name)
1242 {
1243 struct node_host *n;
1244 struct ifgroupreq ifgr;
1245 int s;
1246
1247 if (iftab == NULL)
1248 ifa_load();
1249
1250 /* check wether this is a group */
1251 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1252 err(1, "socket");
1253 bzero(&ifgr, sizeof(ifgr));
1254 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1255 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1256 /* fake a node_host */
1257 if ((n = calloc(1, sizeof(*n))) == NULL)
1258 err(1, "calloc");
1259 if ((n->ifname = strdup(ifa_name)) == NULL)
1260 err(1, "strdup");
1261 close(s);
1262 return (n);
1263 }
1264 close(s);
1265
1266 for (n = iftab; n; n = n->next) {
1267 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1268 return (n);
1269 }
1270
1271 return (NULL);
1272 }
1273
1274 struct node_host *
ifa_grouplookup(const char * ifa_name,int flags)1275 ifa_grouplookup(const char *ifa_name, int flags)
1276 {
1277 struct ifg_req *ifg;
1278 struct ifgroupreq ifgr;
1279 int s, len;
1280 struct node_host *n, *h = NULL;
1281
1282 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1283 err(1, "socket");
1284 bzero(&ifgr, sizeof(ifgr));
1285 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1286 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1287 close(s);
1288 return (NULL);
1289 }
1290
1291 len = ifgr.ifgr_len;
1292 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1293 err(1, "calloc");
1294 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1295 err(1, "SIOCGIFGMEMB");
1296
1297 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1298 ifg++) {
1299 len -= sizeof(struct ifg_req);
1300 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1301 continue;
1302 if (h == NULL)
1303 h = n;
1304 else {
1305 h->tail->next = n;
1306 h->tail = n->tail;
1307 }
1308 }
1309 free(ifgr.ifgr_groups);
1310 close(s);
1311
1312 return (h);
1313 }
1314
1315 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1316 ifa_lookup(const char *ifa_name, int flags)
1317 {
1318 struct node_host *p = NULL, *h = NULL, *n = NULL;
1319 int got4 = 0, got6 = 0;
1320 const char *last_if = NULL;
1321
1322 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1323 return (h);
1324
1325 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1326 ifa_name = NULL;
1327
1328 if (iftab == NULL)
1329 ifa_load();
1330
1331 for (p = iftab; p; p = p->next) {
1332 if (ifa_skip_if(ifa_name, p))
1333 continue;
1334 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1335 continue;
1336 if ((flags & PFI_AFLAG_BROADCAST) &&
1337 !(p->ifa_flags & IFF_BROADCAST))
1338 continue;
1339 if ((flags & PFI_AFLAG_PEER) &&
1340 !(p->ifa_flags & IFF_POINTOPOINT))
1341 continue;
1342 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1343 continue;
1344 if (last_if == NULL || strcmp(last_if, p->ifname))
1345 got4 = got6 = 0;
1346 last_if = p->ifname;
1347 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1348 continue;
1349 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1350 continue;
1351 if (p->af == AF_INET)
1352 got4 = 1;
1353 else
1354 got6 = 1;
1355 n = calloc(1, sizeof(struct node_host));
1356 if (n == NULL)
1357 err(1, "address: calloc");
1358 n->af = p->af;
1359 if (flags & PFI_AFLAG_BROADCAST)
1360 memcpy(&n->addr.v.a.addr, &p->bcast,
1361 sizeof(struct pf_addr));
1362 else if (flags & PFI_AFLAG_PEER)
1363 memcpy(&n->addr.v.a.addr, &p->peer,
1364 sizeof(struct pf_addr));
1365 else
1366 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1367 sizeof(struct pf_addr));
1368 if (flags & PFI_AFLAG_NETWORK)
1369 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1370 else {
1371 if (n->af == AF_INET) {
1372 if (p->ifa_flags & IFF_LOOPBACK &&
1373 p->ifa_flags & IFF_LINK1)
1374 memcpy(&n->addr.v.a.mask,
1375 &p->addr.v.a.mask,
1376 sizeof(struct pf_addr));
1377 else
1378 set_ipmask(n, 32);
1379 } else
1380 set_ipmask(n, 128);
1381 }
1382 n->ifindex = p->ifindex;
1383
1384 n->next = NULL;
1385 n->tail = n;
1386 if (h == NULL)
1387 h = n;
1388 else {
1389 h->tail->next = n;
1390 h->tail = n;
1391 }
1392 }
1393 return (h);
1394 }
1395
1396 int
ifa_skip_if(const char * filter,struct node_host * p)1397 ifa_skip_if(const char *filter, struct node_host *p)
1398 {
1399 int n;
1400
1401 if (p->af != AF_INET && p->af != AF_INET6)
1402 return (1);
1403 if (filter == NULL || !*filter)
1404 return (0);
1405 if (!strcmp(p->ifname, filter))
1406 return (0); /* exact match */
1407 n = strlen(filter);
1408 if (n < 1 || n >= IFNAMSIZ)
1409 return (1); /* sanity check */
1410 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1411 return (1); /* only do exact match in that case */
1412 if (strncmp(p->ifname, filter, n))
1413 return (1); /* prefix doesn't match */
1414 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1415 }
1416
1417
1418 struct node_host *
host(const char * s)1419 host(const char *s)
1420 {
1421 struct node_host *h = NULL;
1422 int mask, v4mask, v6mask, cont = 1;
1423 char *p, *q, *ps;
1424
1425 if ((p = strrchr(s, '/')) != NULL) {
1426 mask = strtol(p+1, &q, 0);
1427 if (!q || *q || mask > 128 || q == (p+1)) {
1428 fprintf(stderr, "invalid netmask '%s'\n", p);
1429 return (NULL);
1430 }
1431 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1432 err(1, "host: malloc");
1433 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1434 v4mask = v6mask = mask;
1435 } else {
1436 if ((ps = strdup(s)) == NULL)
1437 err(1, "host: strdup");
1438 v4mask = 32;
1439 v6mask = 128;
1440 mask = -1;
1441 }
1442
1443 /* interface with this name exists? */
1444 if (cont && (h = host_if(ps, mask)) != NULL)
1445 cont = 0;
1446
1447 /* IPv4 address? */
1448 if (cont && (h = host_v4(s, mask)) != NULL)
1449 cont = 0;
1450
1451 /* IPv6 address? */
1452 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1453 cont = 0;
1454
1455 /* dns lookup */
1456 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1457 cont = 0;
1458 free(ps);
1459
1460 if (h == NULL || cont == 1) {
1461 fprintf(stderr, "no IP address found for %s\n", s);
1462 return (NULL);
1463 }
1464 return (h);
1465 }
1466
1467 struct node_host *
host_if(const char * s,int mask)1468 host_if(const char *s, int mask)
1469 {
1470 struct node_host *n, *h = NULL;
1471 char *p, *ps;
1472 int flags = 0;
1473
1474 if ((ps = strdup(s)) == NULL)
1475 err(1, "host_if: strdup");
1476 while ((p = strrchr(ps, ':')) != NULL) {
1477 if (!strcmp(p+1, "network"))
1478 flags |= PFI_AFLAG_NETWORK;
1479 else if (!strcmp(p+1, "broadcast"))
1480 flags |= PFI_AFLAG_BROADCAST;
1481 else if (!strcmp(p+1, "peer"))
1482 flags |= PFI_AFLAG_PEER;
1483 else if (!strcmp(p+1, "0"))
1484 flags |= PFI_AFLAG_NOALIAS;
1485 else {
1486 free(ps);
1487 return (NULL);
1488 }
1489 *p = '\0';
1490 }
1491 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1492 fprintf(stderr, "illegal combination of interface modifiers\n");
1493 free(ps);
1494 return (NULL);
1495 }
1496 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1497 fprintf(stderr, "network or broadcast lookup, but "
1498 "extra netmask given\n");
1499 free(ps);
1500 return (NULL);
1501 }
1502 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1503 /* interface with this name exists */
1504 h = ifa_lookup(ps, flags);
1505 for (n = h; n != NULL && mask > -1; n = n->next)
1506 set_ipmask(n, mask);
1507 }
1508
1509 free(ps);
1510 return (h);
1511 }
1512
1513 struct node_host *
host_v4(const char * s,int mask)1514 host_v4(const char *s, int mask)
1515 {
1516 struct node_host *h = NULL;
1517 struct in_addr ina;
1518 int bits = 32;
1519
1520 memset(&ina, 0, sizeof(struct in_addr));
1521 if (strrchr(s, '/') != NULL) {
1522 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1523 return (NULL);
1524 } else {
1525 if (inet_pton(AF_INET, s, &ina) != 1)
1526 return (NULL);
1527 }
1528
1529 h = calloc(1, sizeof(struct node_host));
1530 if (h == NULL)
1531 err(1, "address: calloc");
1532 h->ifname = NULL;
1533 h->af = AF_INET;
1534 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1535 set_ipmask(h, bits);
1536 h->next = NULL;
1537 h->tail = h;
1538
1539 return (h);
1540 }
1541
1542 struct node_host *
host_v6(const char * s,int mask)1543 host_v6(const char *s, int mask)
1544 {
1545 struct addrinfo hints, *res;
1546 struct node_host *h = NULL;
1547
1548 memset(&hints, 0, sizeof(hints));
1549 hints.ai_family = AF_INET6;
1550 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1551 hints.ai_flags = AI_NUMERICHOST;
1552 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1553 h = calloc(1, sizeof(struct node_host));
1554 if (h == NULL)
1555 err(1, "address: calloc");
1556 h->ifname = NULL;
1557 h->af = AF_INET6;
1558 memcpy(&h->addr.v.a.addr,
1559 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1560 sizeof(h->addr.v.a.addr));
1561 h->ifindex =
1562 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1563 set_ipmask(h, mask);
1564 freeaddrinfo(res);
1565 h->next = NULL;
1566 h->tail = h;
1567 }
1568
1569 return (h);
1570 }
1571
1572 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1573 host_dns(const char *s, int v4mask, int v6mask)
1574 {
1575 struct addrinfo hints, *res0, *res;
1576 struct node_host *n, *h = NULL;
1577 int error, noalias = 0;
1578 int got4 = 0, got6 = 0;
1579 char *p, *ps;
1580
1581 if ((ps = strdup(s)) == NULL)
1582 err(1, "host_dns: strdup");
1583 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1584 noalias = 1;
1585 *p = '\0';
1586 }
1587 memset(&hints, 0, sizeof(hints));
1588 hints.ai_family = PF_UNSPEC;
1589 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1590 error = getaddrinfo(ps, NULL, &hints, &res0);
1591 if (error) {
1592 free(ps);
1593 return (h);
1594 }
1595
1596 for (res = res0; res; res = res->ai_next) {
1597 if (res->ai_family != AF_INET &&
1598 res->ai_family != AF_INET6)
1599 continue;
1600 if (noalias) {
1601 if (res->ai_family == AF_INET) {
1602 if (got4)
1603 continue;
1604 got4 = 1;
1605 } else {
1606 if (got6)
1607 continue;
1608 got6 = 1;
1609 }
1610 }
1611 n = calloc(1, sizeof(struct node_host));
1612 if (n == NULL)
1613 err(1, "host_dns: calloc");
1614 n->ifname = NULL;
1615 n->af = res->ai_family;
1616 if (res->ai_family == AF_INET) {
1617 memcpy(&n->addr.v.a.addr,
1618 &((struct sockaddr_in *)
1619 res->ai_addr)->sin_addr.s_addr,
1620 sizeof(struct in_addr));
1621 set_ipmask(n, v4mask);
1622 } else {
1623 memcpy(&n->addr.v.a.addr,
1624 &((struct sockaddr_in6 *)
1625 res->ai_addr)->sin6_addr.s6_addr,
1626 sizeof(struct in6_addr));
1627 n->ifindex =
1628 ((struct sockaddr_in6 *)
1629 res->ai_addr)->sin6_scope_id;
1630 set_ipmask(n, v6mask);
1631 }
1632 n->next = NULL;
1633 n->tail = n;
1634 if (h == NULL)
1635 h = n;
1636 else {
1637 h->tail->next = n;
1638 h->tail = n;
1639 }
1640 }
1641 freeaddrinfo(res0);
1642 free(ps);
1643
1644 return (h);
1645 }
1646
1647 /*
1648 * convert a hostname to a list of addresses and put them in the given buffer.
1649 * test:
1650 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1651 */
1652 int
append_addr(struct pfr_buffer * b,char * s,int test)1653 append_addr(struct pfr_buffer *b, char *s, int test)
1654 {
1655 char *r;
1656 struct node_host *h, *n;
1657 int rv, not = 0;
1658
1659 for (r = s; *r == '!'; r++)
1660 not = !not;
1661 if ((n = host(r)) == NULL) {
1662 errno = 0;
1663 return (-1);
1664 }
1665 rv = append_addr_host(b, n, test, not);
1666 do {
1667 h = n;
1668 n = n->next;
1669 free(h);
1670 } while (n != NULL);
1671 return (rv);
1672 }
1673
1674 /*
1675 * same as previous function, but with a pre-parsed input and the ability
1676 * to "negate" the result. Does not free the node_host list.
1677 * not:
1678 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1679 */
1680 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1681 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1682 {
1683 int bits;
1684 struct pfr_addr addr;
1685
1686 do {
1687 bzero(&addr, sizeof(addr));
1688 addr.pfra_not = n->not ^ not;
1689 addr.pfra_af = n->af;
1690 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1691 switch (n->af) {
1692 case AF_INET:
1693 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1694 bits = 32;
1695 break;
1696 case AF_INET6:
1697 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1698 sizeof(struct in6_addr));
1699 bits = 128;
1700 break;
1701 default:
1702 errno = EINVAL;
1703 return (-1);
1704 }
1705 if ((test && (not || addr.pfra_net != bits)) ||
1706 addr.pfra_net > bits) {
1707 errno = EINVAL;
1708 return (-1);
1709 }
1710 if (pfr_buf_add(b, &addr))
1711 return (-1);
1712 } while ((n = n->next) != NULL);
1713
1714 return (0);
1715 }
1716
1717 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)1718 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1719 {
1720 struct pfioc_trans_e trans;
1721
1722 bzero(&trans, sizeof(trans));
1723 trans.rs_num = rs_num;
1724 if (strlcpy(trans.anchor, anchor,
1725 sizeof(trans.anchor)) >= sizeof(trans.anchor))
1726 errx(1, "pfctl_add_trans: strlcpy");
1727
1728 return pfr_buf_add(buf, &trans);
1729 }
1730
1731 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)1732 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1733 {
1734 struct pfioc_trans_e *p;
1735
1736 PFRB_FOREACH(p, buf)
1737 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1738 return (p->ticket);
1739 errx(1, "pfctl_get_ticket: assertion failed");
1740 }
1741
1742 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1743 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1744 {
1745 struct pfioc_trans trans;
1746
1747 bzero(&trans, sizeof(trans));
1748 trans.size = buf->pfrb_size - from;
1749 trans.esize = sizeof(struct pfioc_trans_e);
1750 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1751 return ioctl(dev, cmd, &trans);
1752 }
1753