1 /* $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001 Daniel Hartmeier
7 * Copyright (c) 2002,2003 Henning Brauer
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * - Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * - Redistributions in binary form must reproduce the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer in the documentation and/or other materials provided
19 * with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
35
36 #include <sys/types.h>
37 #include <sys/ioctl.h>
38 #include <sys/socket.h>
39 #include <sys/param.h>
40 #include <sys/proc.h>
41 #include <net/if_dl.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 <netinet/tcp.h>
49 #include <net/pfvar.h>
50 #include <arpa/inet.h>
51
52 #include <assert.h>
53 #include <search.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <ctype.h>
58 #include <netdb.h>
59 #include <stdarg.h>
60 #include <errno.h>
61 #include <err.h>
62 #include <ifaddrs.h>
63 #include <inttypes.h>
64 #include <unistd.h>
65
66 #include "pfctl_parser.h"
67 #include "pfctl.h"
68
69 void print_op (u_int8_t, const char *, const char *);
70 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
71 void print_ugid (u_int8_t, id_t, id_t, const char *);
72 void print_flags (uint16_t);
73 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
74 struct pf_rule_addr *, sa_family_t, u_int8_t, int, int);
75 int ifa_skip_if(const char *filter, struct node_host *p);
76
77 struct node_host *host_if(const char *, int);
78 struct node_host *host_ip(const char *, int);
79 struct node_host *host_dns(const char *, int, int);
80
81 const char * const tcpflags = "FSRPAUEWe";
82
83 static const struct icmptypeent icmp_type[] = {
84 { "echoreq", ICMP_ECHO },
85 { "echorep", ICMP_ECHOREPLY },
86 { "unreach", ICMP_UNREACH },
87 { "squench", ICMP_SOURCEQUENCH },
88 { "redir", ICMP_REDIRECT },
89 { "althost", ICMP_ALTHOSTADDR },
90 { "routeradv", ICMP_ROUTERADVERT },
91 { "routersol", ICMP_ROUTERSOLICIT },
92 { "timex", ICMP_TIMXCEED },
93 { "paramprob", ICMP_PARAMPROB },
94 { "timereq", ICMP_TSTAMP },
95 { "timerep", ICMP_TSTAMPREPLY },
96 { "inforeq", ICMP_IREQ },
97 { "inforep", ICMP_IREQREPLY },
98 { "maskreq", ICMP_MASKREQ },
99 { "maskrep", ICMP_MASKREPLY },
100 { "trace", ICMP_TRACEROUTE },
101 { "dataconv", ICMP_DATACONVERR },
102 { "mobredir", ICMP_MOBILE_REDIRECT },
103 { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
104 { "ipv6-here", ICMP_IPV6_IAMHERE },
105 { "mobregreq", ICMP_MOBILE_REGREQUEST },
106 { "mobregrep", ICMP_MOBILE_REGREPLY },
107 { "skip", ICMP_SKIP },
108 { "photuris", ICMP_PHOTURIS }
109 };
110
111 static const struct icmptypeent icmp6_type[] = {
112 { "unreach", ICMP6_DST_UNREACH },
113 { "toobig", ICMP6_PACKET_TOO_BIG },
114 { "timex", ICMP6_TIME_EXCEEDED },
115 { "paramprob", ICMP6_PARAM_PROB },
116 { "echoreq", ICMP6_ECHO_REQUEST },
117 { "echorep", ICMP6_ECHO_REPLY },
118 { "groupqry", ICMP6_MEMBERSHIP_QUERY },
119 { "listqry", MLD_LISTENER_QUERY },
120 { "grouprep", ICMP6_MEMBERSHIP_REPORT },
121 { "listenrep", MLD_LISTENER_REPORT },
122 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION },
123 { "listendone", MLD_LISTENER_DONE },
124 { "routersol", ND_ROUTER_SOLICIT },
125 { "routeradv", ND_ROUTER_ADVERT },
126 { "neighbrsol", ND_NEIGHBOR_SOLICIT },
127 { "neighbradv", ND_NEIGHBOR_ADVERT },
128 { "redir", ND_REDIRECT },
129 { "routrrenum", ICMP6_ROUTER_RENUMBERING },
130 { "wrureq", ICMP6_WRUREQUEST },
131 { "wrurep", ICMP6_WRUREPLY },
132 { "fqdnreq", ICMP6_FQDN_QUERY },
133 { "fqdnrep", ICMP6_FQDN_REPLY },
134 { "niqry", ICMP6_NI_QUERY },
135 { "nirep", ICMP6_NI_REPLY },
136 { "mtraceresp", MLD_MTRACE_RESP },
137 { "mtrace", MLD_MTRACE },
138 { "listenrepv2", MLDV2_LISTENER_REPORT },
139 };
140
141 static const struct icmpcodeent icmp_code[] = {
142 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
143 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
144 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
145 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
146 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
147 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
148 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
149 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
150 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
151 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
152 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
153 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
154 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
155 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
156 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
157 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
158 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
159 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
160 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
161 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
162 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
163 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
164 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
165 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
166 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
167 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
168 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
169 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
170 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
171 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
172 };
173
174 static const struct icmpcodeent icmp6_code[] = {
175 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
176 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
177 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
178 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
179 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
180 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
181 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
182 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
183 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
184 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
185 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
186 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
187 };
188
189 const struct pf_timeout pf_timeouts[] = {
190 { "tcp.first", PFTM_TCP_FIRST_PACKET },
191 { "tcp.opening", PFTM_TCP_OPENING },
192 { "tcp.established", PFTM_TCP_ESTABLISHED },
193 { "tcp.closing", PFTM_TCP_CLOSING },
194 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
195 { "tcp.closed", PFTM_TCP_CLOSED },
196 { "tcp.tsdiff", PFTM_TS_DIFF },
197 { "sctp.first", PFTM_SCTP_FIRST_PACKET },
198 { "sctp.opening", PFTM_SCTP_OPENING },
199 { "sctp.established", PFTM_SCTP_ESTABLISHED },
200 { "sctp.closing", PFTM_SCTP_CLOSING },
201 { "sctp.closed", PFTM_SCTP_CLOSED },
202 { "udp.first", PFTM_UDP_FIRST_PACKET },
203 { "udp.single", PFTM_UDP_SINGLE },
204 { "udp.multiple", PFTM_UDP_MULTIPLE },
205 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
206 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
207 { "other.first", PFTM_OTHER_FIRST_PACKET },
208 { "other.single", PFTM_OTHER_SINGLE },
209 { "other.multiple", PFTM_OTHER_MULTIPLE },
210 { "frag", PFTM_FRAG },
211 { "interval", PFTM_INTERVAL },
212 { "adaptive.start", PFTM_ADAPTIVE_START },
213 { "adaptive.end", PFTM_ADAPTIVE_END },
214 { "src.track", PFTM_SRC_NODE },
215 { NULL, 0 }
216 };
217
218 static struct hsearch_data isgroup_map;
219
220 static __attribute__((constructor)) void
pfctl_parser_init(void)221 pfctl_parser_init(void)
222 {
223 /*
224 * As hdestroy() will never be called on these tables, it will be
225 * safe to use references into the stored data as keys.
226 */
227 if (hcreate_r(0, &isgroup_map) == 0)
228 err(1, "Failed to create interface group query response map");
229 }
230
231 void
copy_satopfaddr(struct pf_addr * pfa,struct sockaddr * sa)232 copy_satopfaddr(struct pf_addr *pfa, struct sockaddr *sa)
233 {
234 if (sa->sa_family == AF_INET6)
235 pfa->v6 = ((struct sockaddr_in6 *)sa)->sin6_addr;
236 else if (sa->sa_family == AF_INET)
237 pfa->v4 = ((struct sockaddr_in *)sa)->sin_addr;
238 else
239 warnx("unhandled af %d", sa->sa_family);
240 }
241
242 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)243 geticmptypebynumber(u_int8_t type, sa_family_t af)
244 {
245 unsigned int i;
246
247 if (af != AF_INET6) {
248 for (i=0; i < nitems(icmp_type); i++) {
249 if (type == icmp_type[i].type)
250 return (&icmp_type[i]);
251 }
252 } else {
253 for (i=0; i < nitems(icmp6_type); i++) {
254 if (type == icmp6_type[i].type)
255 return (&icmp6_type[i]);
256 }
257 }
258 return (NULL);
259 }
260
261 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)262 geticmptypebyname(char *w, sa_family_t af)
263 {
264 unsigned int i;
265
266 if (af != AF_INET6) {
267 for (i=0; i < nitems(icmp_type); i++) {
268 if (!strcmp(w, icmp_type[i].name))
269 return (&icmp_type[i]);
270 }
271 } else {
272 for (i=0; i < nitems(icmp6_type); i++) {
273 if (!strcmp(w, icmp6_type[i].name))
274 return (&icmp6_type[i]);
275 }
276 }
277 return (NULL);
278 }
279
280 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)281 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
282 {
283 unsigned int i;
284
285 if (af != AF_INET6) {
286 for (i=0; i < nitems(icmp_code); i++) {
287 if (type == icmp_code[i].type &&
288 code == icmp_code[i].code)
289 return (&icmp_code[i]);
290 }
291 } else {
292 for (i=0; i < nitems(icmp6_code); i++) {
293 if (type == icmp6_code[i].type &&
294 code == icmp6_code[i].code)
295 return (&icmp6_code[i]);
296 }
297 }
298 return (NULL);
299 }
300
301 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)302 geticmpcodebyname(u_long type, char *w, sa_family_t af)
303 {
304 unsigned int i;
305
306 if (af != AF_INET6) {
307 for (i=0; i < nitems(icmp_code); i++) {
308 if (type == icmp_code[i].type &&
309 !strcmp(w, icmp_code[i].name))
310 return (&icmp_code[i]);
311 }
312 } else {
313 for (i=0; i < nitems(icmp6_code); i++) {
314 if (type == icmp6_code[i].type &&
315 !strcmp(w, icmp6_code[i].name))
316 return (&icmp6_code[i]);
317 }
318 }
319 return (NULL);
320 }
321
322 void
print_op(u_int8_t op,const char * a1,const char * a2)323 print_op(u_int8_t op, const char *a1, const char *a2)
324 {
325 if (op == PF_OP_IRG)
326 printf(" %s >< %s", a1, a2);
327 else if (op == PF_OP_XRG)
328 printf(" %s <> %s", a1, a2);
329 else if (op == PF_OP_EQ)
330 printf(" = %s", a1);
331 else if (op == PF_OP_NE)
332 printf(" != %s", a1);
333 else if (op == PF_OP_LT)
334 printf(" < %s", a1);
335 else if (op == PF_OP_LE)
336 printf(" <= %s", a1);
337 else if (op == PF_OP_GT)
338 printf(" > %s", a1);
339 else if (op == PF_OP_GE)
340 printf(" >= %s", a1);
341 else if (op == PF_OP_RRG)
342 printf(" %s:%s", a1, a2);
343 }
344
345 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto,int numeric)346 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
347 {
348 char a1[6], a2[6];
349 struct servent *s;
350
351 if (!numeric)
352 s = getservbyport(p1, proto);
353 else
354 s = NULL;
355 p1 = ntohs(p1);
356 p2 = ntohs(p2);
357 snprintf(a1, sizeof(a1), "%u", p1);
358 snprintf(a2, sizeof(a2), "%u", p2);
359 printf(" port");
360 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
361 print_op(op, s->s_name, a2);
362 else
363 print_op(op, a1, a2);
364 }
365
366 void
print_ugid(u_int8_t op,id_t i1,id_t i2,const char * t)367 print_ugid(u_int8_t op, id_t i1, id_t i2, const char *t)
368 {
369 char a1[11], a2[11];
370
371 snprintf(a1, sizeof(a1), "%ju", (uintmax_t)i1);
372 snprintf(a2, sizeof(a2), "%ju", (uintmax_t)i2);
373 printf(" %s", t);
374 if (i1 == -1 && (op == PF_OP_EQ || op == PF_OP_NE))
375 print_op(op, "unknown", a2);
376 else
377 print_op(op, a1, a2);
378 }
379
380 void
print_flags(uint16_t f)381 print_flags(uint16_t f)
382 {
383 int i;
384
385 for (i = 0; tcpflags[i]; ++i)
386 if (f & (1 << i))
387 printf("%c", tcpflags[i]);
388 }
389
390 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)391 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
392 sa_family_t af, u_int8_t proto, int verbose, int numeric)
393 {
394 char buf[PF_OSFP_LEN*3];
395 if (src->addr.type == PF_ADDR_ADDRMASK &&
396 dst->addr.type == PF_ADDR_ADDRMASK &&
397 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
398 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
399 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
400 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
401 !src->neg && !dst->neg &&
402 !src->port_op && !dst->port_op &&
403 osfp == PF_OSFP_ANY)
404 printf(" all");
405 else {
406 printf(" from ");
407 if (src->neg)
408 printf("! ");
409 print_addr(&src->addr, af, verbose);
410 if (src->port_op)
411 print_port(src->port_op, src->port[0],
412 src->port[1],
413 proto == IPPROTO_TCP ? "tcp" : "udp",
414 numeric);
415 if (osfp != PF_OSFP_ANY)
416 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
417 sizeof(buf)));
418
419 printf(" to ");
420 if (dst->neg)
421 printf("! ");
422 print_addr(&dst->addr, af, verbose);
423 if (dst->port_op)
424 print_port(dst->port_op, dst->port[0],
425 dst->port[1],
426 proto == IPPROTO_TCP ? "tcp" : "udp",
427 numeric);
428 }
429 }
430
431 void
print_pool(struct pfctl_pool * pool,u_int16_t p1,u_int16_t p2,int id)432 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2, int id)
433 {
434 struct pfctl_pooladdr *pooladdr;
435
436 if ((TAILQ_FIRST(&pool->list) != NULL) &&
437 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
438 printf("{ ");
439 TAILQ_FOREACH(pooladdr, &pool->list, entries){
440 switch (id) {
441 case PF_NAT:
442 case PF_RDR:
443 case PF_BINAT:
444 print_addr(&pooladdr->addr, pooladdr->af, 0);
445 break;
446 case PF_PASS:
447 case PF_MATCH:
448 if (PF_AZERO(&pooladdr->addr.v.a.addr, pooladdr->af))
449 printf("%s", pooladdr->ifname);
450 else {
451 printf("(%s ", pooladdr->ifname);
452 print_addr(&pooladdr->addr, pooladdr->af, 0);
453 printf(")");
454 }
455 break;
456 default:
457 break;
458 }
459 if (TAILQ_NEXT(pooladdr, entries) != NULL)
460 printf(", ");
461 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
462 printf(" }");
463 }
464 switch (id) {
465 case PF_NAT:
466 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
467 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
468 if (p1 == p2)
469 printf(" port %u", p1);
470 else
471 printf(" port %u:%u", p1, p2);
472 }
473 break;
474 case PF_RDR:
475 if (p1) {
476 printf(" port %u", p1);
477 if (p2 && (p2 != p1))
478 printf(":%u", p2);
479 }
480 break;
481 default:
482 break;
483 }
484 switch (pool->opts & PF_POOL_TYPEMASK) {
485 case PF_POOL_NONE:
486 break;
487 case PF_POOL_BITMASK:
488 printf(" bitmask");
489 break;
490 case PF_POOL_RANDOM:
491 printf(" random");
492 break;
493 case PF_POOL_SRCHASH:
494 printf(" source-hash 0x%08x%08x%08x%08x",
495 pool->key.key32[0], pool->key.key32[1],
496 pool->key.key32[2], pool->key.key32[3]);
497 break;
498 case PF_POOL_ROUNDROBIN:
499 printf(" round-robin");
500 break;
501 }
502 if (pool->opts & PF_POOL_STICKYADDR)
503 printf(" sticky-address");
504 if (pool->opts & PF_POOL_ENDPI)
505 printf(" endpoint-independent");
506 if (id == PF_NAT && p1 == 0 && p2 == 0)
507 printf(" static-port");
508 if (pool->mape.offset > 0)
509 printf(" map-e-portset %u/%u/%u",
510 pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
511 }
512
513 void
print_status(struct pfctl_status * s,struct pfctl_syncookies * cookies,int opts)514 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts)
515 {
516 struct pfctl_status_counter *c;
517 char statline[80], *running;
518 time_t runtime;
519 int i;
520 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
521 static const char hex[] = "0123456789abcdef";
522
523 runtime = time(NULL) - s->since;
524 running = s->running ? "Enabled" : "Disabled";
525
526 if (s->since) {
527 unsigned int sec, min, hrs;
528 time_t day = runtime;
529
530 sec = day % 60;
531 day /= 60;
532 min = day % 60;
533 day /= 60;
534 hrs = day % 24;
535 day /= 24;
536 snprintf(statline, sizeof(statline),
537 "Status: %s for %lld days %.2u:%.2u:%.2u",
538 running, (long long)day, hrs, min, sec);
539 } else
540 snprintf(statline, sizeof(statline), "Status: %s", running);
541 printf("%-44s", statline);
542 switch (s->debug) {
543 case PF_DEBUG_NONE:
544 printf("%15s\n\n", "Debug: None");
545 break;
546 case PF_DEBUG_URGENT:
547 printf("%15s\n\n", "Debug: Urgent");
548 break;
549 case PF_DEBUG_MISC:
550 printf("%15s\n\n", "Debug: Misc");
551 break;
552 case PF_DEBUG_NOISY:
553 printf("%15s\n\n", "Debug: Loud");
554 break;
555 }
556
557 if (opts & PF_OPT_VERBOSE) {
558 printf("Hostid: 0x%08x\n", s->hostid);
559
560 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
561 buf[i + i] = hex[s->pf_chksum[i] >> 4];
562 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
563 }
564 buf[i + i] = '\0';
565 printf("Checksum: 0x%s\n\n", buf);
566 }
567
568 if (s->ifname[0] != 0) {
569 printf("Interface Stats for %-16s %5s %16s\n",
570 s->ifname, "IPv4", "IPv6");
571 printf(" %-25s %14llu %16llu\n", "Bytes In",
572 (unsigned long long)s->bcounters[0][0],
573 (unsigned long long)s->bcounters[1][0]);
574 printf(" %-25s %14llu %16llu\n", "Bytes Out",
575 (unsigned long long)s->bcounters[0][1],
576 (unsigned long long)s->bcounters[1][1]);
577 printf(" Packets In\n");
578 printf(" %-23s %14llu %16llu\n", "Passed",
579 (unsigned long long)s->pcounters[0][0][PF_PASS],
580 (unsigned long long)s->pcounters[1][0][PF_PASS]);
581 printf(" %-23s %14llu %16llu\n", "Blocked",
582 (unsigned long long)s->pcounters[0][0][PF_DROP],
583 (unsigned long long)s->pcounters[1][0][PF_DROP]);
584 printf(" Packets Out\n");
585 printf(" %-23s %14llu %16llu\n", "Passed",
586 (unsigned long long)s->pcounters[0][1][PF_PASS],
587 (unsigned long long)s->pcounters[1][1][PF_PASS]);
588 printf(" %-23s %14llu %16llu\n\n", "Blocked",
589 (unsigned long long)s->pcounters[0][1][PF_DROP],
590 (unsigned long long)s->pcounters[1][1][PF_DROP]);
591 }
592 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
593 printf(" %-25s %14ju %14s\n", "current entries", s->states, "");
594 TAILQ_FOREACH(c, &s->fcounters, entry) {
595 printf(" %-25s %14ju ", c->name, c->counter);
596 if (runtime > 0)
597 printf("%14.1f/s\n",
598 (double)c->counter / (double)runtime);
599 else
600 printf("%14s\n", "");
601 }
602 if (opts & PF_OPT_VERBOSE) {
603 printf("Source Tracking Table\n");
604 printf(" %-25s %14ju %14s\n", "current entries",
605 s->src_nodes, "");
606 TAILQ_FOREACH(c, &s->scounters, entry) {
607 printf(" %-25s %14ju ", c->name, c->counter);
608 if (runtime > 0)
609 printf("%14.1f/s\n",
610 (double)c->counter / (double)runtime);
611 else
612 printf("%14s\n", "");
613 }
614 }
615 printf("Counters\n");
616 TAILQ_FOREACH(c, &s->counters, entry) {
617 printf(" %-25s %14ju ", c->name, c->counter);
618 if (runtime > 0)
619 printf("%14.1f/s\n",
620 (double)c->counter / (double)runtime);
621 else
622 printf("%14s\n", "");
623 }
624 if (opts & PF_OPT_VERBOSE) {
625 printf("Limit Counters\n");
626 TAILQ_FOREACH(c, &s->lcounters, entry) {
627 printf(" %-25s %14ju ", c->name, c->counter);
628 if (runtime > 0)
629 printf("%14.1f/s\n",
630 (double)c->counter / (double)runtime);
631 else
632 printf("%14s\n", "");
633 }
634
635 printf("Syncookies\n");
636 assert(cookies->mode <= PFCTL_SYNCOOKIES_ADAPTIVE);
637 printf(" %-25s %s\n", "mode",
638 PFCTL_SYNCOOKIES_MODE_NAMES[cookies->mode]);
639 printf(" %-25s %s\n", "active",
640 s->syncookies_active ? "active" : "inactive");
641 if (opts & PF_OPT_VERBOSE2) {
642 printf(" %-25s %d %%\n", "highwater", cookies->highwater);
643 printf(" %-25s %d %%\n", "lowwater", cookies->lowwater);
644 printf(" %-25s %d\n", "halfopen states", cookies->halfopen_states);
645 }
646 printf("Reassemble %24s %s\n",
647 s->reass & PF_REASS_ENABLED ? "yes" : "no",
648 s->reass & PF_REASS_NODF ? "no-df" : ""
649 );
650 }
651 }
652
653 void
print_running(struct pfctl_status * status)654 print_running(struct pfctl_status *status)
655 {
656 printf("%s\n", status->running ? "Enabled" : "Disabled");
657 }
658
659 void
print_src_node(struct pfctl_src_node * sn,int opts)660 print_src_node(struct pfctl_src_node *sn, int opts)
661 {
662 struct pf_addr_wrap aw;
663 uint64_t min, sec;
664 const char *sn_type_names[] = PF_SN_TYPE_NAMES;
665
666 memset(&aw, 0, sizeof(aw));
667 if (sn->af == AF_INET)
668 aw.v.a.mask.addr32[0] = 0xffffffff;
669 else
670 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
671
672 aw.v.a.addr = sn->addr;
673 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
674 printf(" -> ");
675 aw.v.a.addr = sn->raddr;
676 print_addr(&aw, sn->raf, opts & PF_OPT_VERBOSE2);
677 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
678 sn->conn, sn->conn_rate.count / 1000,
679 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
680 if (opts & PF_OPT_VERBOSE) {
681 sec = sn->creation % 60;
682 sn->creation /= 60;
683 min = sn->creation % 60;
684 sn->creation /= 60;
685 printf(" age %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
686 sn->creation, min, sec);
687 if (sn->states == 0) {
688 sec = sn->expire % 60;
689 sn->expire /= 60;
690 min = sn->expire % 60;
691 sn->expire /= 60;
692 printf(", expires in %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
693 sn->expire, min, sec);
694 }
695 printf(", %" PRIu64 " pkts, %" PRIu64 " bytes",
696 sn->packets[0] + sn->packets[1],
697 sn->bytes[0] + sn->bytes[1]);
698 switch (sn->ruletype) {
699 case PF_NAT:
700 if (sn->rule != -1)
701 printf(", nat rule %u", sn->rule);
702 break;
703 case PF_RDR:
704 if (sn->rule != -1)
705 printf(", rdr rule %u", sn->rule);
706 break;
707 case PF_PASS:
708 case PF_MATCH:
709 if (sn->rule != -1)
710 printf(", filter rule %u", sn->rule);
711 break;
712 }
713 printf(", %s", sn_type_names[sn->type]);
714 printf("\n");
715 }
716 }
717
718 static void
print_eth_addr(const struct pfctl_eth_addr * a)719 print_eth_addr(const struct pfctl_eth_addr *a)
720 {
721 int i, masklen = ETHER_ADDR_LEN * 8;
722 bool seen_unset = false;
723
724 for (i = 0; i < ETHER_ADDR_LEN; i++) {
725 if (a->addr[i] != 0)
726 break;
727 }
728
729 /* Unset, so don't print anything. */
730 if (i == ETHER_ADDR_LEN)
731 return;
732
733 printf("%s%02x:%02x:%02x:%02x:%02x:%02x", a->neg ? "! " : "",
734 a->addr[0], a->addr[1], a->addr[2], a->addr[3], a->addr[4],
735 a->addr[5]);
736
737 for (i = 0; i < (ETHER_ADDR_LEN * 8); i++) {
738 bool isset = a->mask[i / 8] & (1 << i % 8);
739
740 if (! seen_unset) {
741 if (isset)
742 continue;
743 seen_unset = true;
744 masklen = i;
745 } else {
746 /* Not actually a continuous mask, so print the whole
747 * thing. */
748 if (isset)
749 break;
750 continue;
751 }
752 }
753
754 if (masklen == (ETHER_ADDR_LEN * 8))
755 return;
756
757 if (i == (ETHER_ADDR_LEN * 8)) {
758 printf("/%d", masklen);
759 return;
760 }
761
762 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
763 a->mask[0], a->mask[1], a->mask[2], a->mask[3], a->mask[4],
764 a->mask[5]);
765 }
766
767 void
print_eth_rule(struct pfctl_eth_rule * r,const char * anchor_call,int rule_numbers)768 print_eth_rule(struct pfctl_eth_rule *r, const char *anchor_call,
769 int rule_numbers)
770 {
771 static const char *actiontypes[] = { "pass", "block", "", "", "", "",
772 "", "", "", "", "", "", "match" };
773
774 int i;
775
776 if (rule_numbers)
777 printf("@%u ", r->nr);
778
779 printf("ether ");
780 if (anchor_call[0]) {
781 if (anchor_call[0] == '_') {
782 printf("anchor");
783 } else
784 printf("anchor \"%s\"", anchor_call);
785 } else {
786 printf("%s", actiontypes[r->action]);
787 }
788 if (r->direction == PF_IN)
789 printf(" in");
790 else if (r->direction == PF_OUT)
791 printf(" out");
792
793 if (r->quick)
794 printf(" quick");
795 if (r->ifname[0]) {
796 if (r->ifnot)
797 printf(" on ! %s", r->ifname);
798 else
799 printf(" on %s", r->ifname);
800 }
801 if (r->bridge_to[0])
802 printf(" bridge-to %s", r->bridge_to);
803 if (r->proto)
804 printf(" proto 0x%04x", r->proto);
805
806 if (r->src.isset) {
807 printf(" from ");
808 print_eth_addr(&r->src);
809 }
810 if (r->dst.isset) {
811 printf(" to ");
812 print_eth_addr(&r->dst);
813 }
814 printf(" l3");
815 print_fromto(&r->ipsrc, PF_OSFP_ANY, &r->ipdst,
816 r->proto == ETHERTYPE_IP ? AF_INET : AF_INET6, 0,
817 0, 0);
818
819 i = 0;
820 while (r->label[i][0])
821 printf(" label \"%s\"", r->label[i++]);
822 if (r->ridentifier)
823 printf(" ridentifier %u", r->ridentifier);
824
825 if (r->qname[0])
826 printf(" queue %s", r->qname);
827 if (r->tagname[0])
828 printf(" tag %s", r->tagname);
829 if (r->match_tagname[0]) {
830 if (r->match_tag_not)
831 printf(" !");
832 printf(" tagged %s", r->match_tagname);
833 }
834 if (r->dnpipe)
835 printf(" %s %d",
836 r->dnflags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
837 r->dnpipe);
838 }
839
840 void
print_rule(struct pfctl_rule * r,const char * anchor_call,int verbose,int numeric)841 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
842 {
843 static const char *actiontypes[] = { "pass", "block", "scrub",
844 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr",
845 "", "", "match"};
846 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
847 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
848 "binat-anchor", "rdr-anchor", "rdr-anchor" };
849 int i, ropts;
850 char *p;
851
852 if (verbose)
853 printf("@%d ", r->nr);
854 if (r->action == PF_MATCH)
855 printf("match");
856 else if (r->action > PF_NORDR)
857 printf("action(%d)", r->action);
858 else if (anchor_call[0]) {
859 p = strrchr(anchor_call, '/');
860 if (p ? p[1] == '_' : anchor_call[0] == '_')
861 printf("%s", anchortypes[r->action]);
862 else
863 printf("%s \"%s\"", anchortypes[r->action],
864 anchor_call);
865 } else {
866 printf("%s", actiontypes[r->action]);
867 if (r->natpass)
868 printf(" pass");
869 }
870 if (r->action == PF_DROP) {
871 if (r->rule_flag & PFRULE_RETURN)
872 printf(" return");
873 else if (r->rule_flag & PFRULE_RETURNRST) {
874 if (!r->return_ttl)
875 printf(" return-rst");
876 else
877 printf(" return-rst(ttl %d)", r->return_ttl);
878 } else if (r->rule_flag & PFRULE_RETURNICMP) {
879 const struct icmpcodeent *ic, *ic6;
880
881 ic = geticmpcodebynumber(r->return_icmp >> 8,
882 r->return_icmp & 255, AF_INET);
883 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
884 r->return_icmp6 & 255, AF_INET6);
885
886 switch (r->af) {
887 case AF_INET:
888 printf(" return-icmp");
889 if (ic == NULL)
890 printf("(%u)", r->return_icmp & 255);
891 else
892 printf("(%s)", ic->name);
893 break;
894 case AF_INET6:
895 printf(" return-icmp6");
896 if (ic6 == NULL)
897 printf("(%u)", r->return_icmp6 & 255);
898 else
899 printf("(%s)", ic6->name);
900 break;
901 default:
902 printf(" return-icmp");
903 if (ic == NULL)
904 printf("(%u, ", r->return_icmp & 255);
905 else
906 printf("(%s, ", ic->name);
907 if (ic6 == NULL)
908 printf("%u)", r->return_icmp6 & 255);
909 else
910 printf("%s)", ic6->name);
911 break;
912 }
913 } else
914 printf(" drop");
915 }
916 if (r->direction == PF_IN)
917 printf(" in");
918 else if (r->direction == PF_OUT)
919 printf(" out");
920 if (r->log) {
921 printf(" log");
922 if (r->log & ~PF_LOG || r->logif) {
923 int count = 0;
924
925 printf(" (");
926 if (r->log & PF_LOG_ALL)
927 printf("%sall", count++ ? ", " : "");
928 if (r->log & PF_LOG_MATCHES)
929 printf("%smatches", count++ ? ", " : "");
930 if (r->log & PF_LOG_USER)
931 printf("%suser", count++ ? ", " : "");
932 if (r->logif)
933 printf("%sto pflog%u", count++ ? ", " : "",
934 r->logif);
935 printf(")");
936 }
937 }
938 if (r->quick)
939 printf(" quick");
940 if (r->ifname[0]) {
941 if (r->ifnot)
942 printf(" on ! %s", r->ifname);
943 else
944 printf(" on %s", r->ifname);
945 }
946 if (r->rt) {
947 if (r->rt == PF_ROUTETO)
948 printf(" route-to");
949 else if (r->rt == PF_REPLYTO)
950 printf(" reply-to");
951 else if (r->rt == PF_DUPTO)
952 printf(" dup-to");
953 printf(" ");
954 print_pool(&r->route, 0, 0, PF_PASS);
955 }
956 if (r->af) {
957 if (r->af == AF_INET)
958 printf(" inet");
959 else
960 printf(" inet6");
961 }
962 if (r->proto) {
963 const char *protoname;
964
965 if ((protoname = pfctl_proto2name(r->proto)) != NULL)
966 printf(" proto %s", protoname);
967 else
968 printf(" proto %u", r->proto);
969 }
970 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
971 verbose, numeric);
972 if (r->rcv_ifname[0])
973 printf(" %sreceived-on %s", r->rcvifnot ? "!" : "",
974 r->rcv_ifname);
975 if (r->uid.op)
976 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user");
977 if (r->gid.op)
978 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group");
979 if (r->flags || r->flagset) {
980 printf(" flags ");
981 print_flags(r->flags);
982 printf("/");
983 print_flags(r->flagset);
984 } else if ((r->action == PF_PASS || r->action == PF_MATCH) &&
985 (!r->proto || r->proto == IPPROTO_TCP) &&
986 !(r->rule_flag & PFRULE_FRAGMENT) &&
987 !anchor_call[0] && r->keep_state)
988 printf(" flags any");
989 if (r->type) {
990 const struct icmptypeent *it;
991
992 it = geticmptypebynumber(r->type-1, r->af);
993 if (r->af != AF_INET6)
994 printf(" icmp-type");
995 else
996 printf(" icmp6-type");
997 if (it != NULL)
998 printf(" %s", it->name);
999 else
1000 printf(" %u", r->type-1);
1001 if (r->code) {
1002 const struct icmpcodeent *ic;
1003
1004 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
1005 if (ic != NULL)
1006 printf(" code %s", ic->name);
1007 else
1008 printf(" code %u", r->code-1);
1009 }
1010 }
1011 if (r->tos)
1012 printf(" tos 0x%2.2x", r->tos);
1013 if (r->prio)
1014 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
1015 if (r->pktrate.limit)
1016 printf(" max-pkt-rate %u/%u", r->pktrate.limit,
1017 r->pktrate.seconds);
1018 if (r->max_pkt_size)
1019 printf( " max-pkt-size %u", r->max_pkt_size);
1020 if (r->scrub_flags & PFSTATE_SETMASK) {
1021 char *comma = "";
1022 printf(" set (");
1023 if (r->scrub_flags & PFSTATE_SETPRIO) {
1024 if (r->set_prio[0] == r->set_prio[1])
1025 printf("%s prio %u", comma, r->set_prio[0]);
1026 else
1027 printf("%s prio(%u, %u)", comma, r->set_prio[0],
1028 r->set_prio[1]);
1029 comma = ",";
1030 }
1031 if (r->scrub_flags & PFSTATE_SETTOS) {
1032 printf("%s tos 0x%2.2x", comma, r->set_tos);
1033 comma = ",";
1034 }
1035 printf(" )");
1036 }
1037 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
1038 printf(" no state");
1039 else if (r->keep_state == PF_STATE_NORMAL)
1040 printf(" keep state");
1041 else if (r->keep_state == PF_STATE_MODULATE)
1042 printf(" modulate state");
1043 else if (r->keep_state == PF_STATE_SYNPROXY)
1044 printf(" synproxy state");
1045 if (r->prob) {
1046 char buf[20];
1047
1048 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
1049 for (i = strlen(buf)-1; i > 0; i--) {
1050 if (buf[i] == '0')
1051 buf[i] = '\0';
1052 else {
1053 if (buf[i] == '.')
1054 buf[i] = '\0';
1055 break;
1056 }
1057 }
1058 printf(" probability %s%%", buf);
1059 }
1060 ropts = 0;
1061 if (r->max_states || r->max_src_nodes || r->max_src_states)
1062 ropts = 1;
1063 if (r->rule_flag & PFRULE_NOSYNC)
1064 ropts = 1;
1065 if (r->rule_flag & PFRULE_SRCTRACK)
1066 ropts = 1;
1067 if (r->rule_flag & PFRULE_IFBOUND)
1068 ropts = 1;
1069 if (r->rule_flag & PFRULE_STATESLOPPY)
1070 ropts = 1;
1071 if (r->rule_flag & PFRULE_PFLOW)
1072 ropts = 1;
1073 for (i = 0; !ropts && i < PFTM_MAX; ++i)
1074 if (r->timeout[i])
1075 ropts = 1;
1076 if (ropts) {
1077 printf(" (");
1078 if (r->max_states) {
1079 printf("max %u", r->max_states);
1080 ropts = 0;
1081 }
1082 if (r->rule_flag & PFRULE_NOSYNC) {
1083 if (!ropts)
1084 printf(", ");
1085 printf("no-sync");
1086 ropts = 0;
1087 }
1088 if (r->rule_flag & PFRULE_SRCTRACK) {
1089 if (!ropts)
1090 printf(", ");
1091 printf("source-track");
1092 if (r->rule_flag & PFRULE_RULESRCTRACK)
1093 printf(" rule");
1094 else
1095 printf(" global");
1096 ropts = 0;
1097 }
1098 if (r->max_src_states) {
1099 if (!ropts)
1100 printf(", ");
1101 printf("max-src-states %u", r->max_src_states);
1102 ropts = 0;
1103 }
1104 if (r->max_src_conn) {
1105 if (!ropts)
1106 printf(", ");
1107 printf("max-src-conn %u", r->max_src_conn);
1108 ropts = 0;
1109 }
1110 if (r->max_src_conn_rate.limit) {
1111 if (!ropts)
1112 printf(", ");
1113 printf("max-src-conn-rate %u/%u",
1114 r->max_src_conn_rate.limit,
1115 r->max_src_conn_rate.seconds);
1116 ropts = 0;
1117 }
1118 if (r->max_src_nodes) {
1119 if (!ropts)
1120 printf(", ");
1121 printf("max-src-nodes %u", r->max_src_nodes);
1122 ropts = 0;
1123 }
1124 if (r->overload_tblname[0]) {
1125 if (!ropts)
1126 printf(", ");
1127 printf("overload <%s>", r->overload_tblname);
1128 if (r->flush)
1129 printf(" flush");
1130 if (r->flush & PF_FLUSH_GLOBAL)
1131 printf(" global");
1132 }
1133 if (r->rule_flag & PFRULE_IFBOUND) {
1134 if (!ropts)
1135 printf(", ");
1136 printf("if-bound");
1137 ropts = 0;
1138 }
1139 if (r->rule_flag & PFRULE_STATESLOPPY) {
1140 if (!ropts)
1141 printf(", ");
1142 printf("sloppy");
1143 ropts = 0;
1144 }
1145 if (r->rule_flag & PFRULE_PFLOW) {
1146 if (!ropts)
1147 printf(", ");
1148 printf("pflow");
1149 ropts = 0;
1150 }
1151 for (i = 0; i < PFTM_MAX; ++i)
1152 if (r->timeout[i]) {
1153 int j;
1154
1155 if (!ropts)
1156 printf(", ");
1157 ropts = 0;
1158 for (j = 0; pf_timeouts[j].name != NULL;
1159 ++j)
1160 if (pf_timeouts[j].timeout == i)
1161 break;
1162 printf("%s %u", pf_timeouts[j].name == NULL ?
1163 "inv.timeout" : pf_timeouts[j].name,
1164 r->timeout[i]);
1165 }
1166 printf(")");
1167 }
1168 if (r->allow_opts)
1169 printf(" allow-opts");
1170 if (r->rule_flag & PFRULE_FRAGMENT)
1171 printf(" fragment");
1172 if (r->action == PF_SCRUB) {
1173 /* Scrub flags for old-style scrub. */
1174 if (r->rule_flag & PFRULE_NODF)
1175 printf(" no-df");
1176 if (r->rule_flag & PFRULE_RANDOMID)
1177 printf(" random-id");
1178 if (r->min_ttl)
1179 printf(" min-ttl %d", r->min_ttl);
1180 if (r->max_mss)
1181 printf(" max-mss %d", r->max_mss);
1182 if (r->rule_flag & PFRULE_SET_TOS)
1183 printf(" set-tos 0x%2.2x", r->set_tos);
1184 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1185 printf(" reassemble tcp");
1186 /* The PFRULE_FRAGMENT_NOREASS is set on all rules by default! */
1187 printf(" fragment %sreassemble",
1188 r->rule_flag & PFRULE_FRAGMENT_NOREASS ? "no " : "");
1189 } else if (r->scrub_flags & PFSTATE_SCRUBMASK || r->min_ttl || r->max_mss) {
1190 /* Scrub actions on normal rules. */
1191 printf(" scrub(");
1192 if (r->scrub_flags & PFSTATE_NODF)
1193 printf(" no-df");
1194 if (r->scrub_flags & PFSTATE_RANDOMID)
1195 printf(" random-id");
1196 if (r->min_ttl)
1197 printf(" min-ttl %d", r->min_ttl);
1198 if (r->scrub_flags & PFSTATE_SETTOS)
1199 printf(" set-tos 0x%2.2x", r->set_tos);
1200 if (r->scrub_flags & PFSTATE_SCRUB_TCP)
1201 printf(" reassemble tcp");
1202 if (r->max_mss)
1203 printf(" max-mss %d", r->max_mss);
1204 printf(")");
1205 }
1206 i = 0;
1207 while (r->label[i][0])
1208 printf(" label \"%s\"", r->label[i++]);
1209 if (r->ridentifier)
1210 printf(" ridentifier %u", r->ridentifier);
1211 /* Only dnrpipe as we might do (0, 42) to only queue return traffic. */
1212 if (r->dnrpipe)
1213 printf(" %s(%d, %d)",
1214 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1215 r->dnpipe, r->dnrpipe);
1216 else if (r->dnpipe)
1217 printf(" %s %d",
1218 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1219 r->dnpipe);
1220 if (r->qname[0] && r->pqname[0])
1221 printf(" queue(%s, %s)", r->qname, r->pqname);
1222 else if (r->qname[0])
1223 printf(" queue %s", r->qname);
1224 if (r->tagname[0])
1225 printf(" tag %s", r->tagname);
1226 if (r->match_tagname[0]) {
1227 if (r->match_tag_not)
1228 printf(" !");
1229 printf(" tagged %s", r->match_tagname);
1230 }
1231 if (r->rtableid != -1)
1232 printf(" rtable %u", r->rtableid);
1233 if (r->divert.port) {
1234 #ifdef __FreeBSD__
1235 printf(" divert-to %u", ntohs(r->divert.port));
1236 #else
1237 if (PF_AZERO(&r->divert.addr, r->af)) {
1238 printf(" divert-reply");
1239 } else {
1240 printf(" divert-to ");
1241 print_addr_str(r->af, &r->divert.addr);
1242 printf(" port %u", ntohs(r->divert.port));
1243 }
1244 #endif
1245 }
1246 if (anchor_call[0])
1247 return;
1248 if (r->action == PF_NAT || r->action == PF_BINAT || r->action == PF_RDR) {
1249 printf(" -> ");
1250 print_pool(&r->rdr, r->rdr.proxy_port[0],
1251 r->rdr.proxy_port[1], r->action);
1252 } else {
1253 if (!TAILQ_EMPTY(&r->nat.list)) {
1254 if (r->rule_flag & PFRULE_AFTO) {
1255 printf(" af-to %s from ", r->naf == AF_INET ? "inet" : (r->naf == AF_INET6 ? "inet6" : "? "));
1256 } else {
1257 printf(" nat-to ");
1258 }
1259 print_pool(&r->nat, r->nat.proxy_port[0],
1260 r->nat.proxy_port[1], PF_NAT);
1261 }
1262 if (!TAILQ_EMPTY(&r->rdr.list)) {
1263 if (r->rule_flag & PFRULE_AFTO) {
1264 printf(" to ");
1265 } else {
1266 printf(" rdr-to ");
1267 }
1268 print_pool(&r->rdr, r->rdr.proxy_port[0],
1269 r->rdr.proxy_port[1], PF_RDR);
1270 }
1271 }
1272 }
1273
1274 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1275 print_tabledef(const char *name, int flags, int addrs,
1276 struct node_tinithead *nodes)
1277 {
1278 struct node_tinit *ti, *nti;
1279 struct node_host *h;
1280
1281 printf("table <%s>", name);
1282 if (flags & PFR_TFLAG_CONST)
1283 printf(" const");
1284 if (flags & PFR_TFLAG_PERSIST)
1285 printf(" persist");
1286 if (flags & PFR_TFLAG_COUNTERS)
1287 printf(" counters");
1288 SIMPLEQ_FOREACH(ti, nodes, entries) {
1289 if (ti->file) {
1290 printf(" file \"%s\"", ti->file);
1291 continue;
1292 }
1293 printf(" {");
1294 for (;;) {
1295 for (h = ti->host; h != NULL; h = h->next) {
1296 printf(h->not ? " !" : " ");
1297 print_addr(&h->addr, h->af, 0);
1298 }
1299 nti = SIMPLEQ_NEXT(ti, entries);
1300 if (nti != NULL && nti->file == NULL)
1301 ti = nti; /* merge lists */
1302 else
1303 break;
1304 }
1305 printf(" }");
1306 }
1307 if (addrs && SIMPLEQ_EMPTY(nodes))
1308 printf(" { }");
1309 printf("\n");
1310 }
1311
1312 int
parse_flags(char * s)1313 parse_flags(char *s)
1314 {
1315 char *p, *q;
1316 uint16_t f = 0;
1317
1318 for (p = s; *p; p++) {
1319 if ((q = strchr(tcpflags, *p)) == NULL)
1320 return -1;
1321 else
1322 f |= 1 << (q - tcpflags);
1323 }
1324 return (f ? f : TH_FLAGS);
1325 }
1326
1327 void
set_ipmask(struct node_host * h,int bb)1328 set_ipmask(struct node_host *h, int bb)
1329 {
1330 struct pf_addr *m, *n;
1331 int i, j = 0;
1332 uint8_t b;
1333
1334 m = &h->addr.v.a.mask;
1335 memset(m, 0, sizeof(*m));
1336
1337 if (bb == -1)
1338 b = h->af == AF_INET ? 32 : 128;
1339 else
1340 b = bb;
1341
1342 while (b >= 32) {
1343 m->addr32[j++] = 0xffffffff;
1344 b -= 32;
1345 }
1346 for (i = 31; i > 31-b; --i)
1347 m->addr32[j] |= (1 << i);
1348 if (b)
1349 m->addr32[j] = htonl(m->addr32[j]);
1350
1351 /* Mask off bits of the address that will never be used. */
1352 n = &h->addr.v.a.addr;
1353 if (h->addr.type == PF_ADDR_ADDRMASK)
1354 for (i = 0; i < 4; i++)
1355 n->addr32[i] = n->addr32[i] & m->addr32[i];
1356 }
1357
1358 int
check_netmask(struct node_host * h,sa_family_t af)1359 check_netmask(struct node_host *h, sa_family_t af)
1360 {
1361 struct node_host *n = NULL;
1362 struct pf_addr *m;
1363
1364 for (n = h; n != NULL; n = n->next) {
1365 if (h->addr.type == PF_ADDR_TABLE)
1366 continue;
1367 m = &h->addr.v.a.mask;
1368 /* netmasks > 32 bit are invalid on v4 */
1369 if (af == AF_INET &&
1370 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1371 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1372 unmask(m));
1373 return (1);
1374 }
1375 }
1376 return (0);
1377 }
1378
1379 struct node_host *
gen_dynnode(struct node_host * h,sa_family_t af)1380 gen_dynnode(struct node_host *h, sa_family_t af)
1381 {
1382 struct node_host *n;
1383
1384 if (h->addr.type != PF_ADDR_DYNIFTL)
1385 return (NULL);
1386
1387 if ((n = calloc(1, sizeof(*n))) == NULL)
1388 return (NULL);
1389 bcopy(h, n, sizeof(*n));
1390 n->ifname = NULL;
1391 n->next = NULL;
1392 n->tail = NULL;
1393
1394 /* fix up netmask */
1395 if (af == AF_INET && unmask(&n->addr.v.a.mask) > 32)
1396 set_ipmask(n, 32);
1397
1398 return (n);
1399 }
1400
1401 /* interface lookup routines */
1402
1403 static struct node_host *iftab;
1404
1405 /*
1406 * Retrieve the list of groups this interface is a member of and make sure
1407 * each group is in the group map.
1408 */
1409 static void
ifa_add_groups_to_map(char * ifa_name)1410 ifa_add_groups_to_map(char *ifa_name)
1411 {
1412 int s, len;
1413 struct ifgroupreq ifgr;
1414 struct ifg_req *ifg;
1415
1416 s = get_query_socket();
1417
1418 /* Get size of group list for this interface */
1419 memset(&ifgr, 0, sizeof(ifgr));
1420 strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1421 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1422 err(1, "SIOCGIFGROUP");
1423
1424 /* Retrieve group list for this interface */
1425 len = ifgr.ifgr_len;
1426 ifgr.ifgr_groups =
1427 (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1428 sizeof(struct ifg_req));
1429 if (ifgr.ifgr_groups == NULL)
1430 err(1, "calloc");
1431 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1432 err(1, "SIOCGIFGROUP");
1433
1434 ifg = ifgr.ifgr_groups;
1435 for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1436 len -= sizeof(struct ifg_req);
1437 if (strcmp(ifg->ifgrq_group, "all")) {
1438 ENTRY item;
1439 ENTRY *ret_item;
1440 int *answer;
1441
1442 item.key = ifg->ifgrq_group;
1443 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1444 struct ifgroupreq ifgr2;
1445
1446 /* Don't know the answer yet */
1447 if ((answer = malloc(sizeof(int))) == NULL)
1448 err(1, "malloc");
1449
1450 bzero(&ifgr2, sizeof(ifgr2));
1451 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1452 sizeof(ifgr2.ifgr_name));
1453 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1454 *answer = ifgr2.ifgr_len;
1455 else
1456 *answer = 0;
1457
1458 item.key = strdup(ifg->ifgrq_group);
1459 item.data = answer;
1460 if (hsearch_r(item, ENTER, &ret_item,
1461 &isgroup_map) == 0)
1462 err(1, "interface group query response"
1463 " map insert");
1464 }
1465 }
1466 }
1467 free(ifgr.ifgr_groups);
1468 }
1469
1470 void
ifa_load(void)1471 ifa_load(void)
1472 {
1473 struct ifaddrs *ifap, *ifa;
1474 struct node_host *n = NULL, *h = NULL;
1475
1476 if (getifaddrs(&ifap) < 0)
1477 err(1, "getifaddrs");
1478
1479 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1480 if (ifa->ifa_addr == NULL ||
1481 !(ifa->ifa_addr->sa_family == AF_INET ||
1482 ifa->ifa_addr->sa_family == AF_INET6 ||
1483 ifa->ifa_addr->sa_family == AF_LINK))
1484 continue;
1485 n = calloc(1, sizeof(struct node_host));
1486 if (n == NULL)
1487 err(1, "%s: calloc", __func__);
1488 n->af = ifa->ifa_addr->sa_family;
1489 n->ifa_flags = ifa->ifa_flags;
1490 #ifdef __KAME__
1491 if (n->af == AF_INET6 &&
1492 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1493 ifa->ifa_addr)->sin6_addr) &&
1494 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1495 0) {
1496 struct sockaddr_in6 *sin6;
1497
1498 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1499 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1500 sin6->sin6_addr.s6_addr[3];
1501 sin6->sin6_addr.s6_addr[2] = 0;
1502 sin6->sin6_addr.s6_addr[3] = 0;
1503 }
1504 #endif
1505 n->ifindex = 0;
1506 if (n->af == AF_LINK) {
1507 n->ifindex = ((struct sockaddr_dl *)
1508 ifa->ifa_addr)->sdl_index;
1509 ifa_add_groups_to_map(ifa->ifa_name);
1510 } else {
1511 copy_satopfaddr(&n->addr.v.a.addr, ifa->ifa_addr);
1512 ifa->ifa_netmask->sa_family = ifa->ifa_addr->sa_family;
1513 copy_satopfaddr(&n->addr.v.a.mask, ifa->ifa_netmask);
1514 if (ifa->ifa_broadaddr != NULL) {
1515 ifa->ifa_broadaddr->sa_family = ifa->ifa_addr->sa_family;
1516 copy_satopfaddr(&n->bcast, ifa->ifa_broadaddr);
1517 }
1518 if (ifa->ifa_dstaddr != NULL) {
1519 ifa->ifa_dstaddr->sa_family = ifa->ifa_addr->sa_family;
1520 copy_satopfaddr(&n->peer, ifa->ifa_dstaddr);
1521 }
1522 if (n->af == AF_INET6)
1523 n->ifindex = ((struct sockaddr_in6 *)
1524 ifa->ifa_addr) ->sin6_scope_id;
1525 }
1526 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1527 err(1, "%s: strdup", __func__);
1528 n->next = NULL;
1529 n->tail = n;
1530 if (h == NULL)
1531 h = n;
1532 else {
1533 h->tail->next = n;
1534 h->tail = n;
1535 }
1536 }
1537
1538 iftab = h;
1539 freeifaddrs(ifap);
1540 }
1541
1542 static int
get_socket_domain(void)1543 get_socket_domain(void)
1544 {
1545 int sdom;
1546
1547 sdom = AF_UNSPEC;
1548 #ifdef WITH_INET6
1549 if (sdom == AF_UNSPEC && feature_present("inet6"))
1550 sdom = AF_INET6;
1551 #endif
1552 #ifdef WITH_INET
1553 if (sdom == AF_UNSPEC && feature_present("inet"))
1554 sdom = AF_INET;
1555 #endif
1556 if (sdom == AF_UNSPEC)
1557 sdom = AF_LINK;
1558
1559 return (sdom);
1560 }
1561
1562 int
get_query_socket(void)1563 get_query_socket(void)
1564 {
1565 static int s = -1;
1566
1567 if (s == -1) {
1568 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1569 err(1, "socket");
1570 }
1571
1572 return (s);
1573 }
1574
1575 /*
1576 * Returns the response len if the name is a group, otherwise returns 0.
1577 */
1578 static int
is_a_group(char * name)1579 is_a_group(char *name)
1580 {
1581 ENTRY item;
1582 ENTRY *ret_item;
1583
1584 item.key = name;
1585 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1586 return (0);
1587
1588 return (*(int *)ret_item->data);
1589 }
1590
1591 unsigned int
ifa_nametoindex(const char * ifa_name)1592 ifa_nametoindex(const char *ifa_name)
1593 {
1594 struct node_host *p;
1595
1596 for (p = iftab; p; p = p->next) {
1597 if (p->af == AF_LINK && strcmp(p->ifname, ifa_name) == 0)
1598 return (p->ifindex);
1599 }
1600 errno = ENXIO;
1601 return (0);
1602 }
1603
1604 char *
ifa_indextoname(unsigned int ifindex,char * ifa_name)1605 ifa_indextoname(unsigned int ifindex, char *ifa_name)
1606 {
1607 struct node_host *p;
1608
1609 for (p = iftab; p; p = p->next) {
1610 if (p->af == AF_LINK && ifindex == p->ifindex) {
1611 strlcpy(ifa_name, p->ifname, IFNAMSIZ);
1612 return (ifa_name);
1613 }
1614 }
1615 errno = ENXIO;
1616 return (NULL);
1617 }
1618
1619 struct node_host *
ifa_exists(char * ifa_name)1620 ifa_exists(char *ifa_name)
1621 {
1622 struct node_host *n;
1623
1624 if (iftab == NULL)
1625 ifa_load();
1626
1627 /* check whether this is a group */
1628 if (is_a_group(ifa_name)) {
1629 /* fake a node_host */
1630 if ((n = calloc(1, sizeof(*n))) == NULL)
1631 err(1, "calloc");
1632 if ((n->ifname = strdup(ifa_name)) == NULL)
1633 err(1, "strdup");
1634 return (n);
1635 }
1636
1637 for (n = iftab; n; n = n->next) {
1638 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1639 return (n);
1640 }
1641
1642 return (NULL);
1643 }
1644
1645 struct node_host *
ifa_grouplookup(char * ifa_name,int flags)1646 ifa_grouplookup(char *ifa_name, int flags)
1647 {
1648 struct ifg_req *ifg;
1649 struct ifgroupreq ifgr;
1650 int s, len;
1651 struct node_host *n, *h = NULL;
1652
1653 s = get_query_socket();
1654 len = is_a_group(ifa_name);
1655 if (len == 0)
1656 return (NULL);
1657 bzero(&ifgr, sizeof(ifgr));
1658 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1659 ifgr.ifgr_len = len;
1660 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1661 err(1, "calloc");
1662 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1663 err(1, "SIOCGIFGMEMB");
1664
1665 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1666 ifg++) {
1667 len -= sizeof(struct ifg_req);
1668 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1669 continue;
1670 if (h == NULL)
1671 h = n;
1672 else {
1673 h->tail->next = n;
1674 h->tail = n->tail;
1675 }
1676 }
1677 free(ifgr.ifgr_groups);
1678
1679 return (h);
1680 }
1681
1682 struct node_host *
ifa_lookup(char * ifa_name,int flags)1683 ifa_lookup(char *ifa_name, int flags)
1684 {
1685 struct node_host *p = NULL, *h = NULL, *n = NULL;
1686 int got4 = 0, got6 = 0;
1687 const char *last_if = NULL;
1688
1689 /* first load iftab and isgroup_map */
1690 if (iftab == NULL)
1691 ifa_load();
1692
1693 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1694 return (h);
1695
1696 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1697 ifa_name = NULL;
1698
1699 for (p = iftab; p; p = p->next) {
1700 if (ifa_skip_if(ifa_name, p))
1701 continue;
1702 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1703 continue;
1704 if ((flags & PFI_AFLAG_BROADCAST) &&
1705 !(p->ifa_flags & IFF_BROADCAST))
1706 continue;
1707 if ((flags & PFI_AFLAG_BROADCAST) && p->bcast.v4.s_addr == 0)
1708 continue;
1709 if ((flags & PFI_AFLAG_PEER) &&
1710 !(p->ifa_flags & IFF_POINTOPOINT))
1711 continue;
1712 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1713 continue;
1714 if (last_if == NULL || strcmp(last_if, p->ifname))
1715 got4 = got6 = 0;
1716 last_if = p->ifname;
1717 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1718 continue;
1719 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1720 IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1721 continue;
1722 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1723 continue;
1724 if (p->af == AF_INET)
1725 got4 = 1;
1726 else
1727 got6 = 1;
1728 n = calloc(1, sizeof(struct node_host));
1729 if (n == NULL)
1730 err(1, "%s: calloc", __func__);
1731 n->af = p->af;
1732 if (flags & PFI_AFLAG_BROADCAST)
1733 memcpy(&n->addr.v.a.addr, &p->bcast,
1734 sizeof(struct pf_addr));
1735 else if (flags & PFI_AFLAG_PEER)
1736 memcpy(&n->addr.v.a.addr, &p->peer,
1737 sizeof(struct pf_addr));
1738 else
1739 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1740 sizeof(struct pf_addr));
1741 if (flags & PFI_AFLAG_NETWORK)
1742 set_ipmask(n, unmask(&p->addr.v.a.mask));
1743 else
1744 set_ipmask(n, -1);
1745 n->ifindex = p->ifindex;
1746 n->ifname = strdup(p->ifname);
1747
1748 n->next = NULL;
1749 n->tail = n;
1750 if (h == NULL)
1751 h = n;
1752 else {
1753 h->tail->next = n;
1754 h->tail = n;
1755 }
1756 }
1757 return (h);
1758 }
1759
1760 int
ifa_skip_if(const char * filter,struct node_host * p)1761 ifa_skip_if(const char *filter, struct node_host *p)
1762 {
1763 int n;
1764
1765 if (p->af != AF_INET && p->af != AF_INET6)
1766 return (1);
1767 if (filter == NULL || !*filter)
1768 return (0);
1769 if (!strcmp(p->ifname, filter))
1770 return (0); /* exact match */
1771 n = strlen(filter);
1772 if (n < 1 || n >= IFNAMSIZ)
1773 return (1); /* sanity check */
1774 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1775 return (1); /* only do exact match in that case */
1776 if (strncmp(p->ifname, filter, n))
1777 return (1); /* prefix doesn't match */
1778 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1779 }
1780
1781
1782 struct node_host *
host(const char * s,int opts)1783 host(const char *s, int opts)
1784 {
1785 struct node_host *h = NULL;
1786 int mask = -1;
1787 char *p, *ps;
1788 const char *errstr;
1789
1790 if ((p = strchr(s, '/')) != NULL) {
1791 mask = strtonum(p+1, 0, 128, &errstr);
1792 if (errstr) {
1793 fprintf(stderr, "netmask is %s: %s\n", errstr, p);
1794 goto error;
1795 }
1796 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1797 err(1, "%s: malloc", __func__);
1798 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1799 } else {
1800 if ((ps = strdup(s)) == NULL)
1801 err(1, "%s: strdup", __func__);
1802 }
1803
1804 if ((h = host_ip(ps, mask)) == NULL &&
1805 (h = host_if(ps, mask)) == NULL &&
1806 (h = host_dns(ps, mask, (opts & PF_OPT_NODNS))) == NULL) {
1807 fprintf(stderr, "no IP address found for %s\n", s);
1808 goto error;
1809 }
1810
1811 error:
1812 free(ps);
1813 return (h);
1814 }
1815
1816 struct node_host *
host_if(const char * s,int mask)1817 host_if(const char *s, int mask)
1818 {
1819 struct node_host *n, *h = NULL;
1820 char *p, *ps;
1821 int flags = 0;
1822
1823 if ((ps = strdup(s)) == NULL)
1824 err(1, "host_if: strdup");
1825 while ((p = strrchr(ps, ':')) != NULL) {
1826 if (!strcmp(p+1, "network"))
1827 flags |= PFI_AFLAG_NETWORK;
1828 else if (!strcmp(p+1, "broadcast"))
1829 flags |= PFI_AFLAG_BROADCAST;
1830 else if (!strcmp(p+1, "peer"))
1831 flags |= PFI_AFLAG_PEER;
1832 else if (!strcmp(p+1, "0"))
1833 flags |= PFI_AFLAG_NOALIAS;
1834 else
1835 goto error;
1836 *p = '\0';
1837 }
1838 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1839 fprintf(stderr, "illegal combination of interface modifiers\n");
1840 goto error;
1841 }
1842 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1843 fprintf(stderr, "network or broadcast lookup, but "
1844 "extra netmask given\n");
1845 goto error;
1846 }
1847 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1848 /* interface with this name exists */
1849 h = ifa_lookup(ps, flags);
1850 if (mask > -1)
1851 for (n = h; n != NULL; n = n->next)
1852 set_ipmask(n, mask);
1853 }
1854
1855 error:
1856 free(ps);
1857 return (h);
1858 }
1859
1860 struct node_host *
host_ip(const char * s,int mask)1861 host_ip(const char *s, int mask)
1862 {
1863 struct addrinfo hints, *res;
1864 struct node_host *h = NULL;
1865
1866 h = calloc(1, sizeof(*h));
1867 if (h == NULL)
1868 err(1, "%s: calloc", __func__);
1869 if (mask != -1) {
1870 /* Try to parse 10/8 */
1871 h->af = AF_INET;
1872 if (inet_net_pton(AF_INET, s, &h->addr.v.a.addr.v4,
1873 sizeof(h->addr.v.a.addr.v4)) != -1)
1874 goto out;
1875 }
1876
1877 memset(&hints, 0, sizeof(hints));
1878 hints.ai_family = AF_UNSPEC;
1879 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1880 hints.ai_flags = AI_NUMERICHOST;
1881 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
1882 h->af = res->ai_family;
1883 copy_satopfaddr(&h->addr.v.a.addr, res->ai_addr);
1884 if (h->af == AF_INET6)
1885 h->ifindex =
1886 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1887 freeaddrinfo(res);
1888 } else {
1889 free(h);
1890 return (NULL);
1891 }
1892 out:
1893 set_ipmask(h, mask);
1894 h->ifname = NULL;
1895 h->next = NULL;
1896 h->tail = h;
1897
1898 return (h);
1899 }
1900
1901 struct node_host *
host_dns(const char * s,int mask,int numeric)1902 host_dns(const char *s, int mask, int numeric)
1903 {
1904 struct addrinfo hints, *res0, *res;
1905 struct node_host *n, *h = NULL;
1906 int noalias = 0, got4 = 0, got6 = 0;
1907 char *p, *ps;
1908
1909 if ((ps = strdup(s)) == NULL)
1910 err(1, "host_dns: strdup");
1911 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1912 noalias = 1;
1913 *p = '\0';
1914 }
1915 memset(&hints, 0, sizeof(hints));
1916 hints.ai_family = PF_UNSPEC;
1917 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1918 if (numeric)
1919 hints.ai_flags = AI_NUMERICHOST;
1920 if (getaddrinfo(ps, NULL, &hints, &res0) != 0)
1921 goto error;
1922
1923 for (res = res0; res; res = res->ai_next) {
1924 if (res->ai_family != AF_INET &&
1925 res->ai_family != AF_INET6)
1926 continue;
1927 if (noalias) {
1928 if (res->ai_family == AF_INET) {
1929 if (got4)
1930 continue;
1931 got4 = 1;
1932 } else {
1933 if (got6)
1934 continue;
1935 got6 = 1;
1936 }
1937 }
1938 n = calloc(1, sizeof(struct node_host));
1939 if (n == NULL)
1940 err(1, "host_dns: calloc");
1941 n->ifname = NULL;
1942 n->af = res->ai_family;
1943 copy_satopfaddr(&n->addr.v.a.addr, res->ai_addr);
1944 if (res->ai_family == AF_INET6)
1945 n->ifindex =
1946 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1947 set_ipmask(n, mask);
1948 n->next = NULL;
1949 n->tail = n;
1950 if (h == NULL)
1951 h = n;
1952 else {
1953 h->tail->next = n;
1954 h->tail = n;
1955 }
1956 }
1957 freeaddrinfo(res0);
1958 error:
1959 free(ps);
1960
1961 return (h);
1962 }
1963
1964 /*
1965 * convert a hostname to a list of addresses and put them in the given buffer.
1966 * test:
1967 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1968 */
1969 int
append_addr(struct pfr_buffer * b,char * s,int test,int opts)1970 append_addr(struct pfr_buffer *b, char *s, int test, int opts)
1971 {
1972 char *r;
1973 struct node_host *h, *n;
1974 int rv, not = 0;
1975
1976 for (r = s; *r == '!'; r++)
1977 not = !not;
1978 if ((n = host(r, opts)) == NULL) {
1979 errno = 0;
1980 return (-1);
1981 }
1982 rv = append_addr_host(b, n, test, not);
1983 do {
1984 h = n;
1985 n = n->next;
1986 free(h);
1987 } while (n != NULL);
1988 return (rv);
1989 }
1990
1991 /*
1992 * same as previous function, but with a pre-parsed input and the ability
1993 * to "negate" the result. Does not free the node_host list.
1994 * not:
1995 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1996 */
1997 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1998 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1999 {
2000 int bits;
2001 struct pfr_addr addr;
2002
2003 do {
2004 bzero(&addr, sizeof(addr));
2005 addr.pfra_not = n->not ^ not;
2006 addr.pfra_af = n->af;
2007 addr.pfra_net = unmask(&n->addr.v.a.mask);
2008 switch (n->af) {
2009 case AF_INET:
2010 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
2011 bits = 32;
2012 break;
2013 case AF_INET6:
2014 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
2015 sizeof(struct in6_addr));
2016 bits = 128;
2017 break;
2018 default:
2019 errno = EINVAL;
2020 return (-1);
2021 }
2022 if ((test && (not || addr.pfra_net != bits)) ||
2023 addr.pfra_net > bits) {
2024 errno = EINVAL;
2025 return (-1);
2026 }
2027 if (pfr_buf_add(b, &addr))
2028 return (-1);
2029 } while ((n = n->next) != NULL);
2030
2031 return (0);
2032 }
2033
2034 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)2035 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
2036 {
2037 struct pfioc_trans_e trans;
2038
2039 bzero(&trans, sizeof(trans));
2040 trans.rs_num = rs_num;
2041 if (strlcpy(trans.anchor, anchor,
2042 sizeof(trans.anchor)) >= sizeof(trans.anchor))
2043 errx(1, "pfctl_add_trans: strlcpy");
2044
2045 return pfr_buf_add(buf, &trans);
2046 }
2047
2048 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)2049 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
2050 {
2051 struct pfioc_trans_e *p;
2052
2053 PFRB_FOREACH(p, buf)
2054 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
2055 return (p->ticket);
2056 errx(1, "pfctl_get_ticket: assertion failed");
2057 }
2058
2059 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)2060 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
2061 {
2062 struct pfioc_trans trans;
2063
2064 bzero(&trans, sizeof(trans));
2065 trans.size = buf->pfrb_size - from;
2066 trans.esize = sizeof(struct pfioc_trans_e);
2067 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
2068 return ioctl(dev, cmd, &trans);
2069 }
2070