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("$FreeBSD$");
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 for (i = 0; i < PFTM_MAX; ++i)
959 if (r->timeout[i]) {
960 int j;
961
962 if (!opts)
963 printf(", ");
964 opts = 0;
965 for (j = 0; pf_timeouts[j].name != NULL;
966 ++j)
967 if (pf_timeouts[j].timeout == i)
968 break;
969 printf("%s %u", pf_timeouts[j].name == NULL ?
970 "inv.timeout" : pf_timeouts[j].name,
971 r->timeout[i]);
972 }
973 printf(")");
974 }
975 if (r->rule_flag & PFRULE_FRAGMENT)
976 printf(" fragment");
977 if (r->rule_flag & PFRULE_NODF)
978 printf(" no-df");
979 if (r->rule_flag & PFRULE_RANDOMID)
980 printf(" random-id");
981 if (r->min_ttl)
982 printf(" min-ttl %d", r->min_ttl);
983 if (r->max_mss)
984 printf(" max-mss %d", r->max_mss);
985 if (r->rule_flag & PFRULE_SET_TOS)
986 printf(" set-tos 0x%2.2x", r->set_tos);
987 if (r->allow_opts)
988 printf(" allow-opts");
989 if (r->action == PF_SCRUB) {
990 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
991 printf(" reassemble tcp");
992
993 printf(" fragment reassemble");
994 }
995 if (r->label[0])
996 printf(" label \"%s\"", r->label);
997 if (r->qname[0] && r->pqname[0])
998 printf(" queue(%s, %s)", r->qname, r->pqname);
999 else if (r->qname[0])
1000 printf(" queue %s", r->qname);
1001 if (r->tagname[0])
1002 printf(" tag %s", r->tagname);
1003 if (r->match_tagname[0]) {
1004 if (r->match_tag_not)
1005 printf(" !");
1006 printf(" tagged %s", r->match_tagname);
1007 }
1008 if (r->rtableid != -1)
1009 printf(" rtable %u", r->rtableid);
1010 if (r->divert.port) {
1011 #ifdef __FreeBSD__
1012 printf(" divert-to %u", ntohs(r->divert.port));
1013 #else
1014 if (PF_AZERO(&r->divert.addr, r->af)) {
1015 printf(" divert-reply");
1016 } else {
1017 /* XXX cut&paste from print_addr */
1018 char buf[48];
1019
1020 printf(" divert-to ");
1021 if (inet_ntop(r->af, &r->divert.addr, buf,
1022 sizeof(buf)) == NULL)
1023 printf("?");
1024 else
1025 printf("%s", buf);
1026 printf(" port %u", ntohs(r->divert.port));
1027 }
1028 #endif
1029 }
1030 if (!anchor_call[0] && (r->action == PF_NAT ||
1031 r->action == PF_BINAT || r->action == PF_RDR)) {
1032 printf(" -> ");
1033 print_pool(&r->rpool, r->rpool.proxy_port[0],
1034 r->rpool.proxy_port[1], r->af, r->action);
1035 }
1036 }
1037
1038 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1039 print_tabledef(const char *name, int flags, int addrs,
1040 struct node_tinithead *nodes)
1041 {
1042 struct node_tinit *ti, *nti;
1043 struct node_host *h;
1044
1045 printf("table <%s>", name);
1046 if (flags & PFR_TFLAG_CONST)
1047 printf(" const");
1048 if (flags & PFR_TFLAG_PERSIST)
1049 printf(" persist");
1050 if (flags & PFR_TFLAG_COUNTERS)
1051 printf(" counters");
1052 SIMPLEQ_FOREACH(ti, nodes, entries) {
1053 if (ti->file) {
1054 printf(" file \"%s\"", ti->file);
1055 continue;
1056 }
1057 printf(" {");
1058 for (;;) {
1059 for (h = ti->host; h != NULL; h = h->next) {
1060 printf(h->not ? " !" : " ");
1061 print_addr(&h->addr, h->af, 0);
1062 }
1063 nti = SIMPLEQ_NEXT(ti, entries);
1064 if (nti != NULL && nti->file == NULL)
1065 ti = nti; /* merge lists */
1066 else
1067 break;
1068 }
1069 printf(" }");
1070 }
1071 if (addrs && SIMPLEQ_EMPTY(nodes))
1072 printf(" { }");
1073 printf("\n");
1074 }
1075
1076 int
parse_flags(char * s)1077 parse_flags(char *s)
1078 {
1079 char *p, *q;
1080 u_int8_t f = 0;
1081
1082 for (p = s; *p; p++) {
1083 if ((q = strchr(tcpflags, *p)) == NULL)
1084 return -1;
1085 else
1086 f |= 1 << (q - tcpflags);
1087 }
1088 return (f ? f : PF_TH_ALL);
1089 }
1090
1091 void
set_ipmask(struct node_host * h,u_int8_t b)1092 set_ipmask(struct node_host *h, u_int8_t b)
1093 {
1094 struct pf_addr *m, *n;
1095 int i, j = 0;
1096
1097 m = &h->addr.v.a.mask;
1098 memset(m, 0, sizeof(*m));
1099
1100 while (b >= 32) {
1101 m->addr32[j++] = 0xffffffff;
1102 b -= 32;
1103 }
1104 for (i = 31; i > 31-b; --i)
1105 m->addr32[j] |= (1 << i);
1106 if (b)
1107 m->addr32[j] = htonl(m->addr32[j]);
1108
1109 /* Mask off bits of the address that will never be used. */
1110 n = &h->addr.v.a.addr;
1111 if (h->addr.type == PF_ADDR_ADDRMASK)
1112 for (i = 0; i < 4; i++)
1113 n->addr32[i] = n->addr32[i] & m->addr32[i];
1114 }
1115
1116 int
check_netmask(struct node_host * h,sa_family_t af)1117 check_netmask(struct node_host *h, sa_family_t af)
1118 {
1119 struct node_host *n = NULL;
1120 struct pf_addr *m;
1121
1122 for (n = h; n != NULL; n = n->next) {
1123 if (h->addr.type == PF_ADDR_TABLE)
1124 continue;
1125 m = &h->addr.v.a.mask;
1126 /* fix up netmask for dynaddr */
1127 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1128 unmask(m, AF_INET6) > 32)
1129 set_ipmask(n, 32);
1130 /* netmasks > 32 bit are invalid on v4 */
1131 if (af == AF_INET &&
1132 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1133 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1134 unmask(m, AF_INET6));
1135 return (1);
1136 }
1137 }
1138 return (0);
1139 }
1140
1141 /* interface lookup routines */
1142
1143 struct node_host *iftab;
1144
1145 void
ifa_load(void)1146 ifa_load(void)
1147 {
1148 struct ifaddrs *ifap, *ifa;
1149 struct node_host *n = NULL, *h = NULL;
1150
1151 if (getifaddrs(&ifap) < 0)
1152 err(1, "getifaddrs");
1153
1154 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1155 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1156 ifa->ifa_addr->sa_family == AF_INET6 ||
1157 ifa->ifa_addr->sa_family == AF_LINK))
1158 continue;
1159 n = calloc(1, sizeof(struct node_host));
1160 if (n == NULL)
1161 err(1, "address: calloc");
1162 n->af = ifa->ifa_addr->sa_family;
1163 n->ifa_flags = ifa->ifa_flags;
1164 #ifdef __KAME__
1165 if (n->af == AF_INET6 &&
1166 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1167 ifa->ifa_addr)->sin6_addr) &&
1168 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1169 0) {
1170 struct sockaddr_in6 *sin6;
1171
1172 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1173 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1174 sin6->sin6_addr.s6_addr[3];
1175 sin6->sin6_addr.s6_addr[2] = 0;
1176 sin6->sin6_addr.s6_addr[3] = 0;
1177 }
1178 #endif
1179 n->ifindex = 0;
1180 if (n->af == AF_INET) {
1181 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1182 ifa->ifa_addr)->sin_addr.s_addr,
1183 sizeof(struct in_addr));
1184 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1185 ifa->ifa_netmask)->sin_addr.s_addr,
1186 sizeof(struct in_addr));
1187 if (ifa->ifa_broadaddr != NULL)
1188 memcpy(&n->bcast, &((struct sockaddr_in *)
1189 ifa->ifa_broadaddr)->sin_addr.s_addr,
1190 sizeof(struct in_addr));
1191 if (ifa->ifa_dstaddr != NULL)
1192 memcpy(&n->peer, &((struct sockaddr_in *)
1193 ifa->ifa_dstaddr)->sin_addr.s_addr,
1194 sizeof(struct in_addr));
1195 } else if (n->af == AF_INET6) {
1196 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1197 ifa->ifa_addr)->sin6_addr.s6_addr,
1198 sizeof(struct in6_addr));
1199 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1200 ifa->ifa_netmask)->sin6_addr.s6_addr,
1201 sizeof(struct in6_addr));
1202 if (ifa->ifa_broadaddr != NULL)
1203 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1204 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1205 sizeof(struct in6_addr));
1206 if (ifa->ifa_dstaddr != NULL)
1207 memcpy(&n->peer, &((struct sockaddr_in6 *)
1208 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1209 sizeof(struct in6_addr));
1210 n->ifindex = ((struct sockaddr_in6 *)
1211 ifa->ifa_addr)->sin6_scope_id;
1212 }
1213 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1214 err(1, "ifa_load: strdup");
1215 n->next = NULL;
1216 n->tail = n;
1217 if (h == NULL)
1218 h = n;
1219 else {
1220 h->tail->next = n;
1221 h->tail = n;
1222 }
1223 }
1224
1225 iftab = h;
1226 freeifaddrs(ifap);
1227 }
1228
1229 int
get_socket_domain(void)1230 get_socket_domain(void)
1231 {
1232 int sdom;
1233
1234 sdom = AF_UNSPEC;
1235 #ifdef WITH_INET6
1236 if (sdom == AF_UNSPEC && feature_present("inet6"))
1237 sdom = AF_INET6;
1238 #endif
1239 #ifdef WITH_INET
1240 if (sdom == AF_UNSPEC && feature_present("inet"))
1241 sdom = AF_INET;
1242 #endif
1243 if (sdom == AF_UNSPEC)
1244 sdom = AF_LINK;
1245
1246 return (sdom);
1247 }
1248
1249 struct node_host *
ifa_exists(const char * ifa_name)1250 ifa_exists(const char *ifa_name)
1251 {
1252 struct node_host *n;
1253 struct ifgroupreq ifgr;
1254 int s;
1255
1256 if (iftab == NULL)
1257 ifa_load();
1258
1259 /* check wether this is a group */
1260 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1261 err(1, "socket");
1262 bzero(&ifgr, sizeof(ifgr));
1263 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1264 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1265 /* fake a node_host */
1266 if ((n = calloc(1, sizeof(*n))) == NULL)
1267 err(1, "calloc");
1268 if ((n->ifname = strdup(ifa_name)) == NULL)
1269 err(1, "strdup");
1270 close(s);
1271 return (n);
1272 }
1273 close(s);
1274
1275 for (n = iftab; n; n = n->next) {
1276 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1277 return (n);
1278 }
1279
1280 return (NULL);
1281 }
1282
1283 struct node_host *
ifa_grouplookup(const char * ifa_name,int flags)1284 ifa_grouplookup(const char *ifa_name, int flags)
1285 {
1286 struct ifg_req *ifg;
1287 struct ifgroupreq ifgr;
1288 int s, len;
1289 struct node_host *n, *h = NULL;
1290
1291 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1292 err(1, "socket");
1293 bzero(&ifgr, sizeof(ifgr));
1294 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1295 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1296 close(s);
1297 return (NULL);
1298 }
1299
1300 len = ifgr.ifgr_len;
1301 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1302 err(1, "calloc");
1303 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1304 err(1, "SIOCGIFGMEMB");
1305
1306 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1307 ifg++) {
1308 len -= sizeof(struct ifg_req);
1309 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1310 continue;
1311 if (h == NULL)
1312 h = n;
1313 else {
1314 h->tail->next = n;
1315 h->tail = n->tail;
1316 }
1317 }
1318 free(ifgr.ifgr_groups);
1319 close(s);
1320
1321 return (h);
1322 }
1323
1324 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1325 ifa_lookup(const char *ifa_name, int flags)
1326 {
1327 struct node_host *p = NULL, *h = NULL, *n = NULL;
1328 int got4 = 0, got6 = 0;
1329 const char *last_if = NULL;
1330
1331 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1332 return (h);
1333
1334 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1335 ifa_name = NULL;
1336
1337 if (iftab == NULL)
1338 ifa_load();
1339
1340 for (p = iftab; p; p = p->next) {
1341 if (ifa_skip_if(ifa_name, p))
1342 continue;
1343 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1344 continue;
1345 if ((flags & PFI_AFLAG_BROADCAST) &&
1346 !(p->ifa_flags & IFF_BROADCAST))
1347 continue;
1348 if ((flags & PFI_AFLAG_PEER) &&
1349 !(p->ifa_flags & IFF_POINTOPOINT))
1350 continue;
1351 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1352 continue;
1353 if (last_if == NULL || strcmp(last_if, p->ifname))
1354 got4 = got6 = 0;
1355 last_if = p->ifname;
1356 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1357 continue;
1358 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1359 continue;
1360 if (p->af == AF_INET)
1361 got4 = 1;
1362 else
1363 got6 = 1;
1364 n = calloc(1, sizeof(struct node_host));
1365 if (n == NULL)
1366 err(1, "address: calloc");
1367 n->af = p->af;
1368 if (flags & PFI_AFLAG_BROADCAST)
1369 memcpy(&n->addr.v.a.addr, &p->bcast,
1370 sizeof(struct pf_addr));
1371 else if (flags & PFI_AFLAG_PEER)
1372 memcpy(&n->addr.v.a.addr, &p->peer,
1373 sizeof(struct pf_addr));
1374 else
1375 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1376 sizeof(struct pf_addr));
1377 if (flags & PFI_AFLAG_NETWORK)
1378 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1379 else {
1380 if (n->af == AF_INET) {
1381 if (p->ifa_flags & IFF_LOOPBACK &&
1382 p->ifa_flags & IFF_LINK1)
1383 memcpy(&n->addr.v.a.mask,
1384 &p->addr.v.a.mask,
1385 sizeof(struct pf_addr));
1386 else
1387 set_ipmask(n, 32);
1388 } else
1389 set_ipmask(n, 128);
1390 }
1391 n->ifindex = p->ifindex;
1392
1393 n->next = NULL;
1394 n->tail = n;
1395 if (h == NULL)
1396 h = n;
1397 else {
1398 h->tail->next = n;
1399 h->tail = n;
1400 }
1401 }
1402 return (h);
1403 }
1404
1405 int
ifa_skip_if(const char * filter,struct node_host * p)1406 ifa_skip_if(const char *filter, struct node_host *p)
1407 {
1408 int n;
1409
1410 if (p->af != AF_INET && p->af != AF_INET6)
1411 return (1);
1412 if (filter == NULL || !*filter)
1413 return (0);
1414 if (!strcmp(p->ifname, filter))
1415 return (0); /* exact match */
1416 n = strlen(filter);
1417 if (n < 1 || n >= IFNAMSIZ)
1418 return (1); /* sanity check */
1419 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1420 return (1); /* only do exact match in that case */
1421 if (strncmp(p->ifname, filter, n))
1422 return (1); /* prefix doesn't match */
1423 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1424 }
1425
1426
1427 struct node_host *
host(const char * s)1428 host(const char *s)
1429 {
1430 struct node_host *h = NULL;
1431 int mask, v4mask, v6mask, cont = 1;
1432 char *p, *q, *ps;
1433
1434 if ((p = strrchr(s, '/')) != NULL) {
1435 mask = strtol(p+1, &q, 0);
1436 if (!q || *q || mask > 128 || q == (p+1)) {
1437 fprintf(stderr, "invalid netmask '%s'\n", p);
1438 return (NULL);
1439 }
1440 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1441 err(1, "host: malloc");
1442 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1443 v4mask = v6mask = mask;
1444 } else {
1445 if ((ps = strdup(s)) == NULL)
1446 err(1, "host: strdup");
1447 v4mask = 32;
1448 v6mask = 128;
1449 mask = -1;
1450 }
1451
1452 /* interface with this name exists? */
1453 if (cont && (h = host_if(ps, mask)) != NULL)
1454 cont = 0;
1455
1456 /* IPv4 address? */
1457 if (cont && (h = host_v4(s, mask)) != NULL)
1458 cont = 0;
1459
1460 /* IPv6 address? */
1461 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1462 cont = 0;
1463
1464 /* dns lookup */
1465 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1466 cont = 0;
1467 free(ps);
1468
1469 if (h == NULL || cont == 1) {
1470 fprintf(stderr, "no IP address found for %s\n", s);
1471 return (NULL);
1472 }
1473 return (h);
1474 }
1475
1476 struct node_host *
host_if(const char * s,int mask)1477 host_if(const char *s, int mask)
1478 {
1479 struct node_host *n, *h = NULL;
1480 char *p, *ps;
1481 int flags = 0;
1482
1483 if ((ps = strdup(s)) == NULL)
1484 err(1, "host_if: strdup");
1485 while ((p = strrchr(ps, ':')) != NULL) {
1486 if (!strcmp(p+1, "network"))
1487 flags |= PFI_AFLAG_NETWORK;
1488 else if (!strcmp(p+1, "broadcast"))
1489 flags |= PFI_AFLAG_BROADCAST;
1490 else if (!strcmp(p+1, "peer"))
1491 flags |= PFI_AFLAG_PEER;
1492 else if (!strcmp(p+1, "0"))
1493 flags |= PFI_AFLAG_NOALIAS;
1494 else {
1495 free(ps);
1496 return (NULL);
1497 }
1498 *p = '\0';
1499 }
1500 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1501 fprintf(stderr, "illegal combination of interface modifiers\n");
1502 free(ps);
1503 return (NULL);
1504 }
1505 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1506 fprintf(stderr, "network or broadcast lookup, but "
1507 "extra netmask given\n");
1508 free(ps);
1509 return (NULL);
1510 }
1511 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1512 /* interface with this name exists */
1513 h = ifa_lookup(ps, flags);
1514 for (n = h; n != NULL && mask > -1; n = n->next)
1515 set_ipmask(n, mask);
1516 }
1517
1518 free(ps);
1519 return (h);
1520 }
1521
1522 struct node_host *
host_v4(const char * s,int mask)1523 host_v4(const char *s, int mask)
1524 {
1525 struct node_host *h = NULL;
1526 struct in_addr ina;
1527 int bits = 32;
1528
1529 memset(&ina, 0, sizeof(struct in_addr));
1530 if (strrchr(s, '/') != NULL) {
1531 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1532 return (NULL);
1533 } else {
1534 if (inet_pton(AF_INET, s, &ina) != 1)
1535 return (NULL);
1536 }
1537
1538 h = calloc(1, sizeof(struct node_host));
1539 if (h == NULL)
1540 err(1, "address: calloc");
1541 h->ifname = NULL;
1542 h->af = AF_INET;
1543 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1544 set_ipmask(h, bits);
1545 h->next = NULL;
1546 h->tail = h;
1547
1548 return (h);
1549 }
1550
1551 struct node_host *
host_v6(const char * s,int mask)1552 host_v6(const char *s, int mask)
1553 {
1554 struct addrinfo hints, *res;
1555 struct node_host *h = NULL;
1556
1557 memset(&hints, 0, sizeof(hints));
1558 hints.ai_family = AF_INET6;
1559 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1560 hints.ai_flags = AI_NUMERICHOST;
1561 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1562 h = calloc(1, sizeof(struct node_host));
1563 if (h == NULL)
1564 err(1, "address: calloc");
1565 h->ifname = NULL;
1566 h->af = AF_INET6;
1567 memcpy(&h->addr.v.a.addr,
1568 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1569 sizeof(h->addr.v.a.addr));
1570 h->ifindex =
1571 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1572 set_ipmask(h, mask);
1573 freeaddrinfo(res);
1574 h->next = NULL;
1575 h->tail = h;
1576 }
1577
1578 return (h);
1579 }
1580
1581 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1582 host_dns(const char *s, int v4mask, int v6mask)
1583 {
1584 struct addrinfo hints, *res0, *res;
1585 struct node_host *n, *h = NULL;
1586 int error, noalias = 0;
1587 int got4 = 0, got6 = 0;
1588 char *p, *ps;
1589
1590 if ((ps = strdup(s)) == NULL)
1591 err(1, "host_dns: strdup");
1592 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1593 noalias = 1;
1594 *p = '\0';
1595 }
1596 memset(&hints, 0, sizeof(hints));
1597 hints.ai_family = PF_UNSPEC;
1598 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1599 error = getaddrinfo(ps, NULL, &hints, &res0);
1600 if (error) {
1601 free(ps);
1602 return (h);
1603 }
1604
1605 for (res = res0; res; res = res->ai_next) {
1606 if (res->ai_family != AF_INET &&
1607 res->ai_family != AF_INET6)
1608 continue;
1609 if (noalias) {
1610 if (res->ai_family == AF_INET) {
1611 if (got4)
1612 continue;
1613 got4 = 1;
1614 } else {
1615 if (got6)
1616 continue;
1617 got6 = 1;
1618 }
1619 }
1620 n = calloc(1, sizeof(struct node_host));
1621 if (n == NULL)
1622 err(1, "host_dns: calloc");
1623 n->ifname = NULL;
1624 n->af = res->ai_family;
1625 if (res->ai_family == AF_INET) {
1626 memcpy(&n->addr.v.a.addr,
1627 &((struct sockaddr_in *)
1628 res->ai_addr)->sin_addr.s_addr,
1629 sizeof(struct in_addr));
1630 set_ipmask(n, v4mask);
1631 } else {
1632 memcpy(&n->addr.v.a.addr,
1633 &((struct sockaddr_in6 *)
1634 res->ai_addr)->sin6_addr.s6_addr,
1635 sizeof(struct in6_addr));
1636 n->ifindex =
1637 ((struct sockaddr_in6 *)
1638 res->ai_addr)->sin6_scope_id;
1639 set_ipmask(n, v6mask);
1640 }
1641 n->next = NULL;
1642 n->tail = n;
1643 if (h == NULL)
1644 h = n;
1645 else {
1646 h->tail->next = n;
1647 h->tail = n;
1648 }
1649 }
1650 freeaddrinfo(res0);
1651 free(ps);
1652
1653 return (h);
1654 }
1655
1656 /*
1657 * convert a hostname to a list of addresses and put them in the given buffer.
1658 * test:
1659 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1660 */
1661 int
append_addr(struct pfr_buffer * b,char * s,int test)1662 append_addr(struct pfr_buffer *b, char *s, int test)
1663 {
1664 char *r;
1665 struct node_host *h, *n;
1666 int rv, not = 0;
1667
1668 for (r = s; *r == '!'; r++)
1669 not = !not;
1670 if ((n = host(r)) == NULL) {
1671 errno = 0;
1672 return (-1);
1673 }
1674 rv = append_addr_host(b, n, test, not);
1675 do {
1676 h = n;
1677 n = n->next;
1678 free(h);
1679 } while (n != NULL);
1680 return (rv);
1681 }
1682
1683 /*
1684 * same as previous function, but with a pre-parsed input and the ability
1685 * to "negate" the result. Does not free the node_host list.
1686 * not:
1687 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1688 */
1689 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1690 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1691 {
1692 int bits;
1693 struct pfr_addr addr;
1694
1695 do {
1696 bzero(&addr, sizeof(addr));
1697 addr.pfra_not = n->not ^ not;
1698 addr.pfra_af = n->af;
1699 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1700 switch (n->af) {
1701 case AF_INET:
1702 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1703 bits = 32;
1704 break;
1705 case AF_INET6:
1706 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1707 sizeof(struct in6_addr));
1708 bits = 128;
1709 break;
1710 default:
1711 errno = EINVAL;
1712 return (-1);
1713 }
1714 if ((test && (not || addr.pfra_net != bits)) ||
1715 addr.pfra_net > bits) {
1716 errno = EINVAL;
1717 return (-1);
1718 }
1719 if (pfr_buf_add(b, &addr))
1720 return (-1);
1721 } while ((n = n->next) != NULL);
1722
1723 return (0);
1724 }
1725
1726 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)1727 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1728 {
1729 struct pfioc_trans_e trans;
1730
1731 bzero(&trans, sizeof(trans));
1732 trans.rs_num = rs_num;
1733 if (strlcpy(trans.anchor, anchor,
1734 sizeof(trans.anchor)) >= sizeof(trans.anchor))
1735 errx(1, "pfctl_add_trans: strlcpy");
1736
1737 return pfr_buf_add(buf, &trans);
1738 }
1739
1740 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)1741 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1742 {
1743 struct pfioc_trans_e *p;
1744
1745 PFRB_FOREACH(p, buf)
1746 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1747 return (p->ticket);
1748 errx(1, "pfctl_get_ticket: assertion failed");
1749 }
1750
1751 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1752 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1753 {
1754 struct pfioc_trans trans;
1755
1756 bzero(&trans, sizeof(trans));
1757 trans.size = buf->pfrb_size - from;
1758 trans.esize = sizeof(struct pfioc_trans_e);
1759 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1760 return ioctl(dev, cmd, &trans);
1761 }
1762