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,sa_family_t af,int id)432 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2,
433 sa_family_t af, int id)
434 {
435 struct pf_pooladdr *pooladdr;
436
437 if ((TAILQ_FIRST(&pool->list) != NULL) &&
438 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
439 printf("{ ");
440 TAILQ_FOREACH(pooladdr, &pool->list, entries){
441 switch (id) {
442 case PF_NAT:
443 case PF_RDR:
444 case PF_BINAT:
445 print_addr(&pooladdr->addr, af, 0);
446 break;
447 case PF_PASS:
448 case PF_MATCH:
449 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
450 printf("%s", pooladdr->ifname);
451 else {
452 printf("(%s ", pooladdr->ifname);
453 print_addr(&pooladdr->addr, af, 0);
454 printf(")");
455 }
456 break;
457 default:
458 break;
459 }
460 if (TAILQ_NEXT(pooladdr, entries) != NULL)
461 printf(", ");
462 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
463 printf(" }");
464 }
465 switch (id) {
466 case PF_NAT:
467 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
468 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
469 if (p1 == p2)
470 printf(" port %u", p1);
471 else
472 printf(" port %u:%u", p1, p2);
473 }
474 break;
475 case PF_RDR:
476 if (p1) {
477 printf(" port %u", p1);
478 if (p2 && (p2 != p1))
479 printf(":%u", p2);
480 }
481 break;
482 default:
483 break;
484 }
485 switch (pool->opts & PF_POOL_TYPEMASK) {
486 case PF_POOL_NONE:
487 break;
488 case PF_POOL_BITMASK:
489 printf(" bitmask");
490 break;
491 case PF_POOL_RANDOM:
492 printf(" random");
493 break;
494 case PF_POOL_SRCHASH:
495 printf(" source-hash 0x%08x%08x%08x%08x",
496 pool->key.key32[0], pool->key.key32[1],
497 pool->key.key32[2], pool->key.key32[3]);
498 break;
499 case PF_POOL_ROUNDROBIN:
500 printf(" round-robin");
501 break;
502 }
503 if (pool->opts & PF_POOL_STICKYADDR)
504 printf(" sticky-address");
505 if (pool->opts & PF_POOL_ENDPI)
506 printf(" endpoint-independent");
507 if (id == PF_NAT && p1 == 0 && p2 == 0)
508 printf(" static-port");
509 if (pool->mape.offset > 0)
510 printf(" map-e-portset %u/%u/%u",
511 pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
512 }
513
514 void
print_status(struct pfctl_status * s,struct pfctl_syncookies * cookies,int opts)515 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts)
516 {
517 struct pfctl_status_counter *c;
518 char statline[80], *running;
519 time_t runtime;
520 int i;
521 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
522 static const char hex[] = "0123456789abcdef";
523
524 runtime = time(NULL) - s->since;
525 running = s->running ? "Enabled" : "Disabled";
526
527 if (s->since) {
528 unsigned int sec, min, hrs;
529 time_t day = runtime;
530
531 sec = day % 60;
532 day /= 60;
533 min = day % 60;
534 day /= 60;
535 hrs = day % 24;
536 day /= 24;
537 snprintf(statline, sizeof(statline),
538 "Status: %s for %lld days %.2u:%.2u:%.2u",
539 running, (long long)day, hrs, min, sec);
540 } else
541 snprintf(statline, sizeof(statline), "Status: %s", running);
542 printf("%-44s", statline);
543 switch (s->debug) {
544 case PF_DEBUG_NONE:
545 printf("%15s\n\n", "Debug: None");
546 break;
547 case PF_DEBUG_URGENT:
548 printf("%15s\n\n", "Debug: Urgent");
549 break;
550 case PF_DEBUG_MISC:
551 printf("%15s\n\n", "Debug: Misc");
552 break;
553 case PF_DEBUG_NOISY:
554 printf("%15s\n\n", "Debug: Loud");
555 break;
556 }
557
558 if (opts & PF_OPT_VERBOSE) {
559 printf("Hostid: 0x%08x\n", s->hostid);
560
561 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
562 buf[i + i] = hex[s->pf_chksum[i] >> 4];
563 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
564 }
565 buf[i + i] = '\0';
566 printf("Checksum: 0x%s\n\n", buf);
567 }
568
569 if (s->ifname[0] != 0) {
570 printf("Interface Stats for %-16s %5s %16s\n",
571 s->ifname, "IPv4", "IPv6");
572 printf(" %-25s %14llu %16llu\n", "Bytes In",
573 (unsigned long long)s->bcounters[0][0],
574 (unsigned long long)s->bcounters[1][0]);
575 printf(" %-25s %14llu %16llu\n", "Bytes Out",
576 (unsigned long long)s->bcounters[0][1],
577 (unsigned long long)s->bcounters[1][1]);
578 printf(" Packets In\n");
579 printf(" %-23s %14llu %16llu\n", "Passed",
580 (unsigned long long)s->pcounters[0][0][PF_PASS],
581 (unsigned long long)s->pcounters[1][0][PF_PASS]);
582 printf(" %-23s %14llu %16llu\n", "Blocked",
583 (unsigned long long)s->pcounters[0][0][PF_DROP],
584 (unsigned long long)s->pcounters[1][0][PF_DROP]);
585 printf(" Packets Out\n");
586 printf(" %-23s %14llu %16llu\n", "Passed",
587 (unsigned long long)s->pcounters[0][1][PF_PASS],
588 (unsigned long long)s->pcounters[1][1][PF_PASS]);
589 printf(" %-23s %14llu %16llu\n\n", "Blocked",
590 (unsigned long long)s->pcounters[0][1][PF_DROP],
591 (unsigned long long)s->pcounters[1][1][PF_DROP]);
592 }
593 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
594 printf(" %-25s %14ju %14s\n", "current entries", s->states, "");
595 TAILQ_FOREACH(c, &s->fcounters, entry) {
596 printf(" %-25s %14ju ", c->name, c->counter);
597 if (runtime > 0)
598 printf("%14.1f/s\n",
599 (double)c->counter / (double)runtime);
600 else
601 printf("%14s\n", "");
602 }
603 if (opts & PF_OPT_VERBOSE) {
604 printf("Source Tracking Table\n");
605 printf(" %-25s %14ju %14s\n", "current entries",
606 s->src_nodes, "");
607 TAILQ_FOREACH(c, &s->scounters, entry) {
608 printf(" %-25s %14ju ", c->name, c->counter);
609 if (runtime > 0)
610 printf("%14.1f/s\n",
611 (double)c->counter / (double)runtime);
612 else
613 printf("%14s\n", "");
614 }
615 }
616 printf("Counters\n");
617 TAILQ_FOREACH(c, &s->counters, entry) {
618 printf(" %-25s %14ju ", c->name, c->counter);
619 if (runtime > 0)
620 printf("%14.1f/s\n",
621 (double)c->counter / (double)runtime);
622 else
623 printf("%14s\n", "");
624 }
625 if (opts & PF_OPT_VERBOSE) {
626 printf("Limit Counters\n");
627 TAILQ_FOREACH(c, &s->lcounters, entry) {
628 printf(" %-25s %14ju ", c->name, c->counter);
629 if (runtime > 0)
630 printf("%14.1f/s\n",
631 (double)c->counter / (double)runtime);
632 else
633 printf("%14s\n", "");
634 }
635
636 printf("Syncookies\n");
637 assert(cookies->mode <= PFCTL_SYNCOOKIES_ADAPTIVE);
638 printf(" %-25s %s\n", "mode",
639 PFCTL_SYNCOOKIES_MODE_NAMES[cookies->mode]);
640 printf(" %-25s %s\n", "active",
641 s->syncookies_active ? "active" : "inactive");
642 if (opts & PF_OPT_VERBOSE2) {
643 printf(" %-25s %d %%\n", "highwater", cookies->highwater);
644 printf(" %-25s %d %%\n", "lowwater", cookies->lowwater);
645 printf(" %-25s %d\n", "halfopen states", cookies->halfopen_states);
646 }
647 printf("Reassemble %24s %s\n",
648 s->reass & PF_REASS_ENABLED ? "yes" : "no",
649 s->reass & PF_REASS_NODF ? "no-df" : ""
650 );
651 }
652 }
653
654 void
print_running(struct pfctl_status * status)655 print_running(struct pfctl_status *status)
656 {
657 printf("%s\n", status->running ? "Enabled" : "Disabled");
658 }
659
660 void
print_src_node(struct pfctl_src_node * sn,int opts)661 print_src_node(struct pfctl_src_node *sn, int opts)
662 {
663 struct pf_addr_wrap aw;
664 uint64_t min, sec;
665 const char *sn_type_names[] = PF_SN_TYPE_NAMES;
666
667 memset(&aw, 0, sizeof(aw));
668 if (sn->af == AF_INET)
669 aw.v.a.mask.addr32[0] = 0xffffffff;
670 else
671 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
672
673 aw.v.a.addr = sn->addr;
674 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
675 printf(" -> ");
676 aw.v.a.addr = sn->raddr;
677 print_addr(&aw, sn->naf ? sn->naf : sn->af, opts & PF_OPT_VERBOSE2);
678 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
679 sn->conn, sn->conn_rate.count / 1000,
680 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
681 if (opts & PF_OPT_VERBOSE) {
682 sec = sn->creation % 60;
683 sn->creation /= 60;
684 min = sn->creation % 60;
685 sn->creation /= 60;
686 printf(" age %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
687 sn->creation, min, sec);
688 if (sn->states == 0) {
689 sec = sn->expire % 60;
690 sn->expire /= 60;
691 min = sn->expire % 60;
692 sn->expire /= 60;
693 printf(", expires in %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
694 sn->expire, min, sec);
695 }
696 printf(", %" PRIu64 " pkts, %" PRIu64 " bytes",
697 sn->packets[0] + sn->packets[1],
698 sn->bytes[0] + sn->bytes[1]);
699 switch (sn->ruletype) {
700 case PF_NAT:
701 if (sn->rule != -1)
702 printf(", nat rule %u", sn->rule);
703 break;
704 case PF_RDR:
705 if (sn->rule != -1)
706 printf(", rdr rule %u", sn->rule);
707 break;
708 case PF_PASS:
709 case PF_MATCH:
710 if (sn->rule != -1)
711 printf(", filter rule %u", sn->rule);
712 break;
713 }
714 printf(", %s", sn_type_names[sn->type]);
715 printf("\n");
716 }
717 }
718
719 static void
print_eth_addr(const struct pfctl_eth_addr * a)720 print_eth_addr(const struct pfctl_eth_addr *a)
721 {
722 int i, masklen = ETHER_ADDR_LEN * 8;
723 bool seen_unset = false;
724
725 for (i = 0; i < ETHER_ADDR_LEN; i++) {
726 if (a->addr[i] != 0)
727 break;
728 }
729
730 /* Unset, so don't print anything. */
731 if (i == ETHER_ADDR_LEN)
732 return;
733
734 printf("%s%02x:%02x:%02x:%02x:%02x:%02x", a->neg ? "! " : "",
735 a->addr[0], a->addr[1], a->addr[2], a->addr[3], a->addr[4],
736 a->addr[5]);
737
738 for (i = 0; i < (ETHER_ADDR_LEN * 8); i++) {
739 bool isset = a->mask[i / 8] & (1 << i % 8);
740
741 if (! seen_unset) {
742 if (isset)
743 continue;
744 seen_unset = true;
745 masklen = i;
746 } else {
747 /* Not actually a continuous mask, so print the whole
748 * thing. */
749 if (isset)
750 break;
751 continue;
752 }
753 }
754
755 if (masklen == (ETHER_ADDR_LEN * 8))
756 return;
757
758 if (i == (ETHER_ADDR_LEN * 8)) {
759 printf("/%d", masklen);
760 return;
761 }
762
763 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
764 a->mask[0], a->mask[1], a->mask[2], a->mask[3], a->mask[4],
765 a->mask[5]);
766 }
767
768 void
print_eth_rule(struct pfctl_eth_rule * r,const char * anchor_call,int rule_numbers)769 print_eth_rule(struct pfctl_eth_rule *r, const char *anchor_call,
770 int rule_numbers)
771 {
772 static const char *actiontypes[] = { "pass", "block", "", "", "", "",
773 "", "", "", "", "", "", "match" };
774
775 int i;
776
777 if (rule_numbers)
778 printf("@%u ", r->nr);
779
780 printf("ether ");
781 if (anchor_call[0]) {
782 if (anchor_call[0] == '_') {
783 printf("anchor");
784 } else
785 printf("anchor \"%s\"", anchor_call);
786 } else {
787 printf("%s", actiontypes[r->action]);
788 }
789 if (r->direction == PF_IN)
790 printf(" in");
791 else if (r->direction == PF_OUT)
792 printf(" out");
793
794 if (r->quick)
795 printf(" quick");
796 if (r->ifname[0]) {
797 if (r->ifnot)
798 printf(" on ! %s", r->ifname);
799 else
800 printf(" on %s", r->ifname);
801 }
802 if (r->bridge_to[0])
803 printf(" bridge-to %s", r->bridge_to);
804 if (r->proto)
805 printf(" proto 0x%04x", r->proto);
806
807 if (r->src.isset) {
808 printf(" from ");
809 print_eth_addr(&r->src);
810 }
811 if (r->dst.isset) {
812 printf(" to ");
813 print_eth_addr(&r->dst);
814 }
815 printf(" l3");
816 print_fromto(&r->ipsrc, PF_OSFP_ANY, &r->ipdst,
817 r->proto == ETHERTYPE_IP ? AF_INET : AF_INET6, 0,
818 0, 0);
819
820 i = 0;
821 while (r->label[i][0])
822 printf(" label \"%s\"", r->label[i++]);
823 if (r->ridentifier)
824 printf(" ridentifier %u", r->ridentifier);
825
826 if (r->qname[0])
827 printf(" queue %s", r->qname);
828 if (r->tagname[0])
829 printf(" tag %s", r->tagname);
830 if (r->match_tagname[0]) {
831 if (r->match_tag_not)
832 printf(" !");
833 printf(" tagged %s", r->match_tagname);
834 }
835 if (r->dnpipe)
836 printf(" %s %d",
837 r->dnflags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
838 r->dnpipe);
839 }
840
841 void
print_rule(struct pfctl_rule * r,const char * anchor_call,int verbose,int numeric)842 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
843 {
844 static const char *actiontypes[] = { "pass", "block", "scrub",
845 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr",
846 "", "", "match"};
847 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
848 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
849 "binat-anchor", "rdr-anchor", "rdr-anchor" };
850 int i, ropts;
851 char *p;
852
853 if (verbose)
854 printf("@%d ", r->nr);
855 if (r->action == PF_MATCH)
856 printf("match");
857 else if (r->action > PF_NORDR)
858 printf("action(%d)", r->action);
859 else if (anchor_call[0]) {
860 p = strrchr(anchor_call, '/');
861 if (p ? p[1] == '_' : anchor_call[0] == '_')
862 printf("%s", anchortypes[r->action]);
863 else
864 printf("%s \"%s\"", anchortypes[r->action],
865 anchor_call);
866 } else {
867 printf("%s", actiontypes[r->action]);
868 if (r->natpass)
869 printf(" pass");
870 }
871 if (r->action == PF_DROP) {
872 if (r->rule_flag & PFRULE_RETURN)
873 printf(" return");
874 else if (r->rule_flag & PFRULE_RETURNRST) {
875 if (!r->return_ttl)
876 printf(" return-rst");
877 else
878 printf(" return-rst(ttl %d)", r->return_ttl);
879 } else if (r->rule_flag & PFRULE_RETURNICMP) {
880 const struct icmpcodeent *ic, *ic6;
881
882 ic = geticmpcodebynumber(r->return_icmp >> 8,
883 r->return_icmp & 255, AF_INET);
884 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
885 r->return_icmp6 & 255, AF_INET6);
886
887 switch (r->af) {
888 case AF_INET:
889 printf(" return-icmp");
890 if (ic == NULL)
891 printf("(%u)", r->return_icmp & 255);
892 else
893 printf("(%s)", ic->name);
894 break;
895 case AF_INET6:
896 printf(" return-icmp6");
897 if (ic6 == NULL)
898 printf("(%u)", r->return_icmp6 & 255);
899 else
900 printf("(%s)", ic6->name);
901 break;
902 default:
903 printf(" return-icmp");
904 if (ic == NULL)
905 printf("(%u, ", r->return_icmp & 255);
906 else
907 printf("(%s, ", ic->name);
908 if (ic6 == NULL)
909 printf("%u)", r->return_icmp6 & 255);
910 else
911 printf("%s)", ic6->name);
912 break;
913 }
914 } else
915 printf(" drop");
916 }
917 if (r->direction == PF_IN)
918 printf(" in");
919 else if (r->direction == PF_OUT)
920 printf(" out");
921 if (r->log) {
922 printf(" log");
923 if (r->log & ~PF_LOG || r->logif) {
924 int count = 0;
925
926 printf(" (");
927 if (r->log & PF_LOG_ALL)
928 printf("%sall", count++ ? ", " : "");
929 if (r->log & PF_LOG_MATCHES)
930 printf("%smatches", count++ ? ", " : "");
931 if (r->log & PF_LOG_SOCKET_LOOKUP)
932 printf("%suser", count++ ? ", " : "");
933 if (r->logif)
934 printf("%sto pflog%u", count++ ? ", " : "",
935 r->logif);
936 printf(")");
937 }
938 }
939 if (r->quick)
940 printf(" quick");
941 if (r->ifname[0]) {
942 if (r->ifnot)
943 printf(" on ! %s", r->ifname);
944 else
945 printf(" on %s", r->ifname);
946 }
947 if (r->rt) {
948 if (r->rt == PF_ROUTETO)
949 printf(" route-to");
950 else if (r->rt == PF_REPLYTO)
951 printf(" reply-to");
952 else if (r->rt == PF_DUPTO)
953 printf(" dup-to");
954 printf(" ");
955 print_pool(&r->rdr, 0, 0, r->af, PF_PASS);
956 print_pool(&r->route, 0, 0,
957 r->rule_flag & PFRULE_AFTO && r->rt != PF_REPLYTO ? r->naf : r->af,
958 PF_PASS);
959 }
960 if (r->af) {
961 if (r->af == AF_INET)
962 printf(" inet");
963 else
964 printf(" inet6");
965 }
966 if (r->proto) {
967 const char *protoname;
968
969 if ((protoname = pfctl_proto2name(r->proto)) != NULL)
970 printf(" proto %s", protoname);
971 else
972 printf(" proto %u", r->proto);
973 }
974 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
975 verbose, numeric);
976 if (r->rcv_ifname[0])
977 printf(" %sreceived-on %s", r->rcvifnot ? "!" : "",
978 r->rcv_ifname);
979 if (r->uid.op)
980 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user");
981 if (r->gid.op)
982 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group");
983 if (r->flags || r->flagset) {
984 printf(" flags ");
985 print_flags(r->flags);
986 printf("/");
987 print_flags(r->flagset);
988 } else if ((r->action == PF_PASS || r->action == PF_MATCH) &&
989 (!r->proto || r->proto == IPPROTO_TCP) &&
990 !(r->rule_flag & PFRULE_FRAGMENT) &&
991 !anchor_call[0] && r->keep_state)
992 printf(" flags any");
993 if (r->type) {
994 const struct icmptypeent *it;
995
996 it = geticmptypebynumber(r->type-1, r->af);
997 if (r->af != AF_INET6)
998 printf(" icmp-type");
999 else
1000 printf(" icmp6-type");
1001 if (it != NULL)
1002 printf(" %s", it->name);
1003 else
1004 printf(" %u", r->type-1);
1005 if (r->code) {
1006 const struct icmpcodeent *ic;
1007
1008 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
1009 if (ic != NULL)
1010 printf(" code %s", ic->name);
1011 else
1012 printf(" code %u", r->code-1);
1013 }
1014 }
1015 if (r->tos)
1016 printf(" tos 0x%2.2x", r->tos);
1017 if (r->prio)
1018 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
1019 if (r->pktrate.limit)
1020 printf(" max-pkt-rate %u/%u", r->pktrate.limit,
1021 r->pktrate.seconds);
1022 if (r->max_pkt_size)
1023 printf( " max-pkt-size %u", r->max_pkt_size);
1024 if (r->scrub_flags & PFSTATE_SETMASK) {
1025 char *comma = "";
1026 printf(" set (");
1027 if (r->scrub_flags & PFSTATE_SETPRIO) {
1028 if (r->set_prio[0] == r->set_prio[1])
1029 printf("%s prio %u", comma, r->set_prio[0]);
1030 else
1031 printf("%s prio(%u, %u)", comma, r->set_prio[0],
1032 r->set_prio[1]);
1033 comma = ",";
1034 }
1035 if (r->scrub_flags & PFSTATE_SETTOS) {
1036 printf("%s tos 0x%2.2x", comma, r->set_tos);
1037 comma = ",";
1038 }
1039 printf(" )");
1040 }
1041 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
1042 printf(" no state");
1043 else if (r->keep_state == PF_STATE_NORMAL)
1044 printf(" keep state");
1045 else if (r->keep_state == PF_STATE_MODULATE)
1046 printf(" modulate state");
1047 else if (r->keep_state == PF_STATE_SYNPROXY)
1048 printf(" synproxy state");
1049 if (r->prob) {
1050 char buf[20];
1051
1052 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
1053 for (i = strlen(buf)-1; i > 0; i--) {
1054 if (buf[i] == '0')
1055 buf[i] = '\0';
1056 else {
1057 if (buf[i] == '.')
1058 buf[i] = '\0';
1059 break;
1060 }
1061 }
1062 printf(" probability %s%%", buf);
1063 }
1064 ropts = 0;
1065 if (r->max_states || r->max_src_nodes || r->max_src_states)
1066 ropts = 1;
1067 if (r->rule_flag & PFRULE_NOSYNC)
1068 ropts = 1;
1069 if (r->rule_flag & PFRULE_SRCTRACK)
1070 ropts = 1;
1071 if (r->rule_flag & PFRULE_IFBOUND)
1072 ropts = 1;
1073 if (r->rule_flag & PFRULE_STATESLOPPY)
1074 ropts = 1;
1075 if (r->rule_flag & PFRULE_PFLOW)
1076 ropts = 1;
1077 for (i = 0; !ropts && i < PFTM_MAX; ++i)
1078 if (r->timeout[i])
1079 ropts = 1;
1080 if (ropts) {
1081 printf(" (");
1082 if (r->max_states) {
1083 printf("max %u", r->max_states);
1084 ropts = 0;
1085 }
1086 if (r->rule_flag & PFRULE_NOSYNC) {
1087 if (!ropts)
1088 printf(", ");
1089 printf("no-sync");
1090 ropts = 0;
1091 }
1092 if (r->rule_flag & PFRULE_SRCTRACK) {
1093 if (!ropts)
1094 printf(", ");
1095 printf("source-track");
1096 if (r->rule_flag & PFRULE_RULESRCTRACK)
1097 printf(" rule");
1098 else
1099 printf(" global");
1100 ropts = 0;
1101 }
1102 if (r->max_src_states) {
1103 if (!ropts)
1104 printf(", ");
1105 printf("max-src-states %u", r->max_src_states);
1106 ropts = 0;
1107 }
1108 if (r->max_src_conn) {
1109 if (!ropts)
1110 printf(", ");
1111 printf("max-src-conn %u", r->max_src_conn);
1112 ropts = 0;
1113 }
1114 if (r->max_src_conn_rate.limit) {
1115 if (!ropts)
1116 printf(", ");
1117 printf("max-src-conn-rate %u/%u",
1118 r->max_src_conn_rate.limit,
1119 r->max_src_conn_rate.seconds);
1120 ropts = 0;
1121 }
1122 if (r->max_src_nodes) {
1123 if (!ropts)
1124 printf(", ");
1125 printf("max-src-nodes %u", r->max_src_nodes);
1126 ropts = 0;
1127 }
1128 if (r->overload_tblname[0]) {
1129 if (!ropts)
1130 printf(", ");
1131 printf("overload <%s>", r->overload_tblname);
1132 if (r->flush)
1133 printf(" flush");
1134 if (r->flush & PF_FLUSH_GLOBAL)
1135 printf(" global");
1136 }
1137 if (r->rule_flag & PFRULE_IFBOUND) {
1138 if (!ropts)
1139 printf(", ");
1140 printf("if-bound");
1141 ropts = 0;
1142 }
1143 if (r->rule_flag & PFRULE_STATESLOPPY) {
1144 if (!ropts)
1145 printf(", ");
1146 printf("sloppy");
1147 ropts = 0;
1148 }
1149 if (r->rule_flag & PFRULE_PFLOW) {
1150 if (!ropts)
1151 printf(", ");
1152 printf("pflow");
1153 ropts = 0;
1154 }
1155 for (i = 0; i < PFTM_MAX; ++i)
1156 if (r->timeout[i]) {
1157 int j;
1158
1159 if (!ropts)
1160 printf(", ");
1161 ropts = 0;
1162 for (j = 0; pf_timeouts[j].name != NULL;
1163 ++j)
1164 if (pf_timeouts[j].timeout == i)
1165 break;
1166 printf("%s %u", pf_timeouts[j].name == NULL ?
1167 "inv.timeout" : pf_timeouts[j].name,
1168 r->timeout[i]);
1169 }
1170 printf(")");
1171 }
1172 if (r->allow_opts)
1173 printf(" allow-opts");
1174 if (r->rule_flag & PFRULE_FRAGMENT)
1175 printf(" fragment");
1176 if (r->action == PF_SCRUB) {
1177 /* Scrub flags for old-style scrub. */
1178 if (r->rule_flag & PFRULE_NODF)
1179 printf(" no-df");
1180 if (r->rule_flag & PFRULE_RANDOMID)
1181 printf(" random-id");
1182 if (r->min_ttl)
1183 printf(" min-ttl %d", r->min_ttl);
1184 if (r->max_mss)
1185 printf(" max-mss %d", r->max_mss);
1186 if (r->rule_flag & PFRULE_SET_TOS)
1187 printf(" set-tos 0x%2.2x", r->set_tos);
1188 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1189 printf(" reassemble tcp");
1190 /* The PFRULE_FRAGMENT_NOREASS is set on all rules by default! */
1191 printf(" fragment %sreassemble",
1192 r->rule_flag & PFRULE_FRAGMENT_NOREASS ? "no " : "");
1193 } else if (r->scrub_flags & PFSTATE_SCRUBMASK || r->min_ttl || r->max_mss) {
1194 /* Scrub actions on normal rules. */
1195 printf(" scrub(");
1196 if (r->scrub_flags & PFSTATE_NODF)
1197 printf(" no-df");
1198 if (r->scrub_flags & PFSTATE_RANDOMID)
1199 printf(" random-id");
1200 if (r->min_ttl)
1201 printf(" min-ttl %d", r->min_ttl);
1202 if (r->scrub_flags & PFSTATE_SETTOS)
1203 printf(" set-tos 0x%2.2x", r->set_tos);
1204 if (r->scrub_flags & PFSTATE_SCRUB_TCP)
1205 printf(" reassemble tcp");
1206 if (r->max_mss)
1207 printf(" max-mss %d", r->max_mss);
1208 printf(")");
1209 }
1210 i = 0;
1211 while (r->label[i][0])
1212 printf(" label \"%s\"", r->label[i++]);
1213 if (r->ridentifier)
1214 printf(" ridentifier %u", r->ridentifier);
1215 /* Only dnrpipe as we might do (0, 42) to only queue return traffic. */
1216 if (r->dnrpipe)
1217 printf(" %s(%d, %d)",
1218 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1219 r->dnpipe, r->dnrpipe);
1220 else if (r->dnpipe)
1221 printf(" %s %d",
1222 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1223 r->dnpipe);
1224 if (r->qname[0] && r->pqname[0])
1225 printf(" queue(%s, %s)", r->qname, r->pqname);
1226 else if (r->qname[0])
1227 printf(" queue %s", r->qname);
1228 if (r->tagname[0])
1229 printf(" tag %s", r->tagname);
1230 if (r->match_tagname[0]) {
1231 if (r->match_tag_not)
1232 printf(" !");
1233 printf(" tagged %s", r->match_tagname);
1234 }
1235 if (r->rtableid != -1)
1236 printf(" rtable %u", r->rtableid);
1237 if (r->divert.port) {
1238 #ifdef __FreeBSD__
1239 printf(" divert-to %u", ntohs(r->divert.port));
1240 #else
1241 if (PF_AZERO(&r->divert.addr, r->af)) {
1242 printf(" divert-reply");
1243 } else {
1244 printf(" divert-to ");
1245 print_addr_str(r->af, &r->divert.addr);
1246 printf(" port %u", ntohs(r->divert.port));
1247 }
1248 #endif
1249 }
1250 if (anchor_call[0])
1251 return;
1252 if (r->action == PF_NAT || r->action == PF_BINAT || r->action == PF_RDR) {
1253 printf(" -> ");
1254 print_pool(&r->rdr, r->rdr.proxy_port[0],
1255 r->rdr.proxy_port[1], r->af, r->action);
1256 } else {
1257 if (!TAILQ_EMPTY(&r->nat.list)) {
1258 if (r->rule_flag & PFRULE_AFTO) {
1259 printf(" af-to %s from ", r->naf == AF_INET ? "inet" : "inet6");
1260 } else {
1261 printf(" nat-to ");
1262 }
1263 print_pool(&r->nat, r->nat.proxy_port[0],
1264 r->nat.proxy_port[1], r->naf ? r->naf : r->af,
1265 PF_NAT);
1266 }
1267 if (!TAILQ_EMPTY(&r->rdr.list)) {
1268 if (r->rule_flag & PFRULE_AFTO) {
1269 printf(" to ");
1270 } else {
1271 printf(" rdr-to ");
1272 }
1273 print_pool(&r->rdr, r->rdr.proxy_port[0],
1274 r->rdr.proxy_port[1], r->naf ? r->naf : r->af,
1275 PF_RDR);
1276 }
1277 }
1278 }
1279
1280 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1281 print_tabledef(const char *name, int flags, int addrs,
1282 struct node_tinithead *nodes)
1283 {
1284 struct node_tinit *ti, *nti;
1285 struct node_host *h;
1286
1287 printf("table <%s>", name);
1288 if (flags & PFR_TFLAG_CONST)
1289 printf(" const");
1290 if (flags & PFR_TFLAG_PERSIST)
1291 printf(" persist");
1292 if (flags & PFR_TFLAG_COUNTERS)
1293 printf(" counters");
1294 SIMPLEQ_FOREACH(ti, nodes, entries) {
1295 if (ti->file) {
1296 printf(" file \"%s\"", ti->file);
1297 continue;
1298 }
1299 printf(" {");
1300 for (;;) {
1301 for (h = ti->host; h != NULL; h = h->next) {
1302 printf(h->not ? " !" : " ");
1303 print_addr(&h->addr, h->af, 0);
1304 }
1305 nti = SIMPLEQ_NEXT(ti, entries);
1306 if (nti != NULL && nti->file == NULL)
1307 ti = nti; /* merge lists */
1308 else
1309 break;
1310 }
1311 printf(" }");
1312 }
1313 if (addrs && SIMPLEQ_EMPTY(nodes))
1314 printf(" { }");
1315 printf("\n");
1316 }
1317
1318 int
parse_flags(char * s)1319 parse_flags(char *s)
1320 {
1321 char *p, *q;
1322 uint16_t f = 0;
1323
1324 for (p = s; *p; p++) {
1325 if ((q = strchr(tcpflags, *p)) == NULL)
1326 return -1;
1327 else
1328 f |= 1 << (q - tcpflags);
1329 }
1330 return (f ? f : TH_FLAGS);
1331 }
1332
1333 void
set_ipmask(struct node_host * h,int bb)1334 set_ipmask(struct node_host *h, int bb)
1335 {
1336 struct pf_addr *m, *n;
1337 int i, j = 0;
1338 uint8_t b;
1339
1340 m = &h->addr.v.a.mask;
1341 memset(m, 0, sizeof(*m));
1342
1343 if (bb == -1)
1344 b = h->af == AF_INET ? 32 : 128;
1345 else
1346 b = bb;
1347
1348 while (b >= 32) {
1349 m->addr32[j++] = 0xffffffff;
1350 b -= 32;
1351 }
1352 for (i = 31; i > 31-b; --i)
1353 m->addr32[j] |= (1 << i);
1354 if (b)
1355 m->addr32[j] = htonl(m->addr32[j]);
1356
1357 /* Mask off bits of the address that will never be used. */
1358 n = &h->addr.v.a.addr;
1359 if (h->addr.type == PF_ADDR_ADDRMASK)
1360 for (i = 0; i < 4; i++)
1361 n->addr32[i] = n->addr32[i] & m->addr32[i];
1362 }
1363
1364 int
check_netmask(struct node_host * h,sa_family_t af)1365 check_netmask(struct node_host *h, sa_family_t af)
1366 {
1367 struct node_host *n = NULL;
1368 struct pf_addr *m;
1369
1370 for (n = h; n != NULL; n = n->next) {
1371 if (h->addr.type == PF_ADDR_TABLE)
1372 continue;
1373 m = &h->addr.v.a.mask;
1374 /* netmasks > 32 bit are invalid on v4 */
1375 if (af == AF_INET &&
1376 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1377 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1378 unmask(m));
1379 return (1);
1380 }
1381 }
1382 return (0);
1383 }
1384
1385 struct node_host *
gen_dynnode(struct node_host * h,sa_family_t af)1386 gen_dynnode(struct node_host *h, sa_family_t af)
1387 {
1388 struct node_host *n;
1389
1390 if (h->addr.type != PF_ADDR_DYNIFTL)
1391 return (NULL);
1392
1393 if ((n = calloc(1, sizeof(*n))) == NULL)
1394 return (NULL);
1395 bcopy(h, n, sizeof(*n));
1396 n->ifname = NULL;
1397 n->next = NULL;
1398 n->tail = NULL;
1399
1400 /* fix up netmask */
1401 if (af == AF_INET && unmask(&n->addr.v.a.mask) > 32)
1402 set_ipmask(n, 32);
1403
1404 return (n);
1405 }
1406
1407 /* interface lookup routines */
1408
1409 static struct node_host *iftab;
1410
1411 /*
1412 * Retrieve the list of groups this interface is a member of and make sure
1413 * each group is in the group map.
1414 */
1415 static void
ifa_add_groups_to_map(char * ifa_name)1416 ifa_add_groups_to_map(char *ifa_name)
1417 {
1418 int s, len;
1419 struct ifgroupreq ifgr;
1420 struct ifg_req *ifg;
1421
1422 s = get_query_socket();
1423
1424 /* Get size of group list for this interface */
1425 memset(&ifgr, 0, sizeof(ifgr));
1426 strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1427 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1428 err(1, "SIOCGIFGROUP");
1429
1430 /* Retrieve group list for this interface */
1431 len = ifgr.ifgr_len;
1432 ifgr.ifgr_groups =
1433 (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1434 sizeof(struct ifg_req));
1435 if (ifgr.ifgr_groups == NULL)
1436 err(1, "calloc");
1437 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1438 err(1, "SIOCGIFGROUP");
1439
1440 ifg = ifgr.ifgr_groups;
1441 for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1442 len -= sizeof(struct ifg_req);
1443 if (strcmp(ifg->ifgrq_group, "all")) {
1444 ENTRY item;
1445 ENTRY *ret_item;
1446 int *answer;
1447
1448 item.key = ifg->ifgrq_group;
1449 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1450 struct ifgroupreq ifgr2;
1451
1452 /* Don't know the answer yet */
1453 if ((answer = malloc(sizeof(int))) == NULL)
1454 err(1, "malloc");
1455
1456 bzero(&ifgr2, sizeof(ifgr2));
1457 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1458 sizeof(ifgr2.ifgr_name));
1459 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1460 *answer = ifgr2.ifgr_len;
1461 else
1462 *answer = 0;
1463
1464 item.key = strdup(ifg->ifgrq_group);
1465 item.data = answer;
1466 if (hsearch_r(item, ENTER, &ret_item,
1467 &isgroup_map) == 0)
1468 err(1, "interface group query response"
1469 " map insert");
1470 }
1471 }
1472 }
1473 free(ifgr.ifgr_groups);
1474 }
1475
1476 void
ifa_load(void)1477 ifa_load(void)
1478 {
1479 struct ifaddrs *ifap, *ifa;
1480 struct node_host *n = NULL, *h = NULL;
1481
1482 if (getifaddrs(&ifap) < 0)
1483 err(1, "getifaddrs");
1484
1485 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1486 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1487 ifa->ifa_addr->sa_family == AF_INET6 ||
1488 ifa->ifa_addr->sa_family == AF_LINK))
1489 continue;
1490 n = calloc(1, sizeof(struct node_host));
1491 if (n == NULL)
1492 err(1, "%s: calloc", __func__);
1493 n->af = ifa->ifa_addr->sa_family;
1494 n->ifa_flags = ifa->ifa_flags;
1495 #ifdef __KAME__
1496 if (n->af == AF_INET6 &&
1497 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1498 ifa->ifa_addr)->sin6_addr) &&
1499 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1500 0) {
1501 struct sockaddr_in6 *sin6;
1502
1503 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1504 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1505 sin6->sin6_addr.s6_addr[3];
1506 sin6->sin6_addr.s6_addr[2] = 0;
1507 sin6->sin6_addr.s6_addr[3] = 0;
1508 }
1509 #endif
1510 n->ifindex = 0;
1511 if (n->af == AF_LINK) {
1512 n->ifindex = ((struct sockaddr_dl *)
1513 ifa->ifa_addr)->sdl_index;
1514 ifa_add_groups_to_map(ifa->ifa_name);
1515 } else {
1516 copy_satopfaddr(&n->addr.v.a.addr, ifa->ifa_addr);
1517 ifa->ifa_netmask->sa_family = ifa->ifa_addr->sa_family;
1518 copy_satopfaddr(&n->addr.v.a.mask, ifa->ifa_netmask);
1519 if (ifa->ifa_broadaddr != NULL) {
1520 ifa->ifa_broadaddr->sa_family = ifa->ifa_addr->sa_family;
1521 copy_satopfaddr(&n->bcast, ifa->ifa_broadaddr);
1522 }
1523 if (ifa->ifa_dstaddr != NULL) {
1524 ifa->ifa_dstaddr->sa_family = ifa->ifa_addr->sa_family;
1525 copy_satopfaddr(&n->peer, ifa->ifa_dstaddr);
1526 }
1527 if (n->af == AF_INET6)
1528 n->ifindex = ((struct sockaddr_in6 *)
1529 ifa->ifa_addr) ->sin6_scope_id;
1530 }
1531 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1532 err(1, "%s: strdup", __func__);
1533 n->next = NULL;
1534 n->tail = n;
1535 if (h == NULL)
1536 h = n;
1537 else {
1538 h->tail->next = n;
1539 h->tail = n;
1540 }
1541 }
1542
1543 iftab = h;
1544 freeifaddrs(ifap);
1545 }
1546
1547 static int
get_socket_domain(void)1548 get_socket_domain(void)
1549 {
1550 int sdom;
1551
1552 sdom = AF_UNSPEC;
1553 #ifdef WITH_INET6
1554 if (sdom == AF_UNSPEC && feature_present("inet6"))
1555 sdom = AF_INET6;
1556 #endif
1557 #ifdef WITH_INET
1558 if (sdom == AF_UNSPEC && feature_present("inet"))
1559 sdom = AF_INET;
1560 #endif
1561 if (sdom == AF_UNSPEC)
1562 sdom = AF_LINK;
1563
1564 return (sdom);
1565 }
1566
1567 int
get_query_socket(void)1568 get_query_socket(void)
1569 {
1570 static int s = -1;
1571
1572 if (s == -1) {
1573 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1574 err(1, "socket");
1575 }
1576
1577 return (s);
1578 }
1579
1580 /*
1581 * Returns the response len if the name is a group, otherwise returns 0.
1582 */
1583 static int
is_a_group(char * name)1584 is_a_group(char *name)
1585 {
1586 ENTRY item;
1587 ENTRY *ret_item;
1588
1589 item.key = name;
1590 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1591 return (0);
1592
1593 return (*(int *)ret_item->data);
1594 }
1595
1596 unsigned int
ifa_nametoindex(const char * ifa_name)1597 ifa_nametoindex(const char *ifa_name)
1598 {
1599 struct node_host *p;
1600
1601 for (p = iftab; p; p = p->next) {
1602 if (p->af == AF_LINK && strcmp(p->ifname, ifa_name) == 0)
1603 return (p->ifindex);
1604 }
1605 errno = ENXIO;
1606 return (0);
1607 }
1608
1609 char *
ifa_indextoname(unsigned int ifindex,char * ifa_name)1610 ifa_indextoname(unsigned int ifindex, char *ifa_name)
1611 {
1612 struct node_host *p;
1613
1614 for (p = iftab; p; p = p->next) {
1615 if (p->af == AF_LINK && ifindex == p->ifindex) {
1616 strlcpy(ifa_name, p->ifname, IFNAMSIZ);
1617 return (ifa_name);
1618 }
1619 }
1620 errno = ENXIO;
1621 return (NULL);
1622 }
1623
1624 struct node_host *
ifa_exists(char * ifa_name)1625 ifa_exists(char *ifa_name)
1626 {
1627 struct node_host *n;
1628
1629 if (iftab == NULL)
1630 ifa_load();
1631
1632 /* check whether this is a group */
1633 if (is_a_group(ifa_name)) {
1634 /* fake a node_host */
1635 if ((n = calloc(1, sizeof(*n))) == NULL)
1636 err(1, "calloc");
1637 if ((n->ifname = strdup(ifa_name)) == NULL)
1638 err(1, "strdup");
1639 return (n);
1640 }
1641
1642 for (n = iftab; n; n = n->next) {
1643 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1644 return (n);
1645 }
1646
1647 return (NULL);
1648 }
1649
1650 struct node_host *
ifa_grouplookup(char * ifa_name,int flags)1651 ifa_grouplookup(char *ifa_name, int flags)
1652 {
1653 struct ifg_req *ifg;
1654 struct ifgroupreq ifgr;
1655 int s, len;
1656 struct node_host *n, *h = NULL;
1657
1658 s = get_query_socket();
1659 len = is_a_group(ifa_name);
1660 if (len == 0)
1661 return (NULL);
1662 bzero(&ifgr, sizeof(ifgr));
1663 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1664 ifgr.ifgr_len = len;
1665 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1666 err(1, "calloc");
1667 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1668 err(1, "SIOCGIFGMEMB");
1669
1670 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1671 ifg++) {
1672 len -= sizeof(struct ifg_req);
1673 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1674 continue;
1675 if (h == NULL)
1676 h = n;
1677 else {
1678 h->tail->next = n;
1679 h->tail = n->tail;
1680 }
1681 }
1682 free(ifgr.ifgr_groups);
1683
1684 return (h);
1685 }
1686
1687 struct node_host *
ifa_lookup(char * ifa_name,int flags)1688 ifa_lookup(char *ifa_name, int flags)
1689 {
1690 struct node_host *p = NULL, *h = NULL, *n = NULL;
1691 int got4 = 0, got6 = 0;
1692 const char *last_if = NULL;
1693
1694 /* first load iftab and isgroup_map */
1695 if (iftab == NULL)
1696 ifa_load();
1697
1698 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1699 return (h);
1700
1701 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1702 ifa_name = NULL;
1703
1704 for (p = iftab; p; p = p->next) {
1705 if (ifa_skip_if(ifa_name, p))
1706 continue;
1707 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1708 continue;
1709 if ((flags & PFI_AFLAG_BROADCAST) &&
1710 !(p->ifa_flags & IFF_BROADCAST))
1711 continue;
1712 if ((flags & PFI_AFLAG_BROADCAST) && p->bcast.v4.s_addr == 0)
1713 continue;
1714 if ((flags & PFI_AFLAG_PEER) &&
1715 !(p->ifa_flags & IFF_POINTOPOINT))
1716 continue;
1717 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1718 continue;
1719 if (last_if == NULL || strcmp(last_if, p->ifname))
1720 got4 = got6 = 0;
1721 last_if = p->ifname;
1722 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1723 continue;
1724 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1725 IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1726 continue;
1727 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1728 continue;
1729 if (p->af == AF_INET)
1730 got4 = 1;
1731 else
1732 got6 = 1;
1733 n = calloc(1, sizeof(struct node_host));
1734 if (n == NULL)
1735 err(1, "%s: calloc", __func__);
1736 n->af = p->af;
1737 if (flags & PFI_AFLAG_BROADCAST)
1738 memcpy(&n->addr.v.a.addr, &p->bcast,
1739 sizeof(struct pf_addr));
1740 else if (flags & PFI_AFLAG_PEER)
1741 memcpy(&n->addr.v.a.addr, &p->peer,
1742 sizeof(struct pf_addr));
1743 else
1744 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1745 sizeof(struct pf_addr));
1746 if (flags & PFI_AFLAG_NETWORK)
1747 set_ipmask(n, unmask(&p->addr.v.a.mask));
1748 else
1749 set_ipmask(n, -1);
1750 n->ifindex = p->ifindex;
1751 n->ifname = strdup(p->ifname);
1752
1753 n->next = NULL;
1754 n->tail = n;
1755 if (h == NULL)
1756 h = n;
1757 else {
1758 h->tail->next = n;
1759 h->tail = n;
1760 }
1761 }
1762 return (h);
1763 }
1764
1765 int
ifa_skip_if(const char * filter,struct node_host * p)1766 ifa_skip_if(const char *filter, struct node_host *p)
1767 {
1768 int n;
1769
1770 if (p->af != AF_INET && p->af != AF_INET6)
1771 return (1);
1772 if (filter == NULL || !*filter)
1773 return (0);
1774 if (!strcmp(p->ifname, filter))
1775 return (0); /* exact match */
1776 n = strlen(filter);
1777 if (n < 1 || n >= IFNAMSIZ)
1778 return (1); /* sanity check */
1779 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1780 return (1); /* only do exact match in that case */
1781 if (strncmp(p->ifname, filter, n))
1782 return (1); /* prefix doesn't match */
1783 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1784 }
1785
1786
1787 struct node_host *
host(const char * s,int opts)1788 host(const char *s, int opts)
1789 {
1790 struct node_host *h = NULL;
1791 int mask = -1;
1792 char *p, *ps;
1793 const char *errstr;
1794
1795 if ((p = strchr(s, '/')) != NULL) {
1796 mask = strtonum(p+1, 0, 128, &errstr);
1797 if (errstr) {
1798 fprintf(stderr, "netmask is %s: %s\n", errstr, p);
1799 goto error;
1800 }
1801 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1802 err(1, "%s: malloc", __func__);
1803 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1804 } else {
1805 if ((ps = strdup(s)) == NULL)
1806 err(1, "%s: strdup", __func__);
1807 }
1808
1809 if ((h = host_ip(ps, mask)) == NULL &&
1810 (h = host_if(ps, mask)) == NULL &&
1811 (h = host_dns(ps, mask, (opts & PF_OPT_NODNS))) == NULL) {
1812 fprintf(stderr, "no IP address found for %s\n", s);
1813 goto error;
1814 }
1815
1816 error:
1817 free(ps);
1818 return (h);
1819 }
1820
1821 struct node_host *
host_if(const char * s,int mask)1822 host_if(const char *s, int mask)
1823 {
1824 struct node_host *n, *h = NULL;
1825 char *p, *ps;
1826 int flags = 0;
1827
1828 if ((ps = strdup(s)) == NULL)
1829 err(1, "host_if: strdup");
1830 while ((p = strrchr(ps, ':')) != NULL) {
1831 if (!strcmp(p+1, "network"))
1832 flags |= PFI_AFLAG_NETWORK;
1833 else if (!strcmp(p+1, "broadcast"))
1834 flags |= PFI_AFLAG_BROADCAST;
1835 else if (!strcmp(p+1, "peer"))
1836 flags |= PFI_AFLAG_PEER;
1837 else if (!strcmp(p+1, "0"))
1838 flags |= PFI_AFLAG_NOALIAS;
1839 else
1840 goto error;
1841 *p = '\0';
1842 }
1843 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1844 fprintf(stderr, "illegal combination of interface modifiers\n");
1845 goto error;
1846 }
1847 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1848 fprintf(stderr, "network or broadcast lookup, but "
1849 "extra netmask given\n");
1850 goto error;
1851 }
1852 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1853 /* interface with this name exists */
1854 h = ifa_lookup(ps, flags);
1855 if (mask > -1)
1856 for (n = h; n != NULL; n = n->next)
1857 set_ipmask(n, mask);
1858 }
1859
1860 error:
1861 free(ps);
1862 return (h);
1863 }
1864
1865 struct node_host *
host_ip(const char * s,int mask)1866 host_ip(const char *s, int mask)
1867 {
1868 struct addrinfo hints, *res;
1869 struct node_host *h = NULL;
1870
1871 h = calloc(1, sizeof(*h));
1872 if (h == NULL)
1873 err(1, "%s: calloc", __func__);
1874 if (mask != -1) {
1875 /* Try to parse 10/8 */
1876 h->af = AF_INET;
1877 if (inet_net_pton(AF_INET, s, &h->addr.v.a.addr.v4,
1878 sizeof(h->addr.v.a.addr.v4)) != -1)
1879 goto out;
1880 }
1881
1882 memset(&hints, 0, sizeof(hints));
1883 hints.ai_family = AF_UNSPEC;
1884 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1885 hints.ai_flags = AI_NUMERICHOST;
1886 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
1887 h->af = res->ai_family;
1888 copy_satopfaddr(&h->addr.v.a.addr, res->ai_addr);
1889 if (h->af == AF_INET6)
1890 h->ifindex =
1891 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1892 freeaddrinfo(res);
1893 } else {
1894 free(h);
1895 return (NULL);
1896 }
1897 out:
1898 set_ipmask(h, mask);
1899 h->ifname = NULL;
1900 h->next = NULL;
1901 h->tail = h;
1902
1903 return (h);
1904 }
1905
1906 struct node_host *
host_dns(const char * s,int mask,int numeric)1907 host_dns(const char *s, int mask, int numeric)
1908 {
1909 struct addrinfo hints, *res0, *res;
1910 struct node_host *n, *h = NULL;
1911 int noalias = 0, got4 = 0, got6 = 0;
1912 char *p, *ps;
1913
1914 if ((ps = strdup(s)) == NULL)
1915 err(1, "host_dns: strdup");
1916 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1917 noalias = 1;
1918 *p = '\0';
1919 }
1920 memset(&hints, 0, sizeof(hints));
1921 hints.ai_family = PF_UNSPEC;
1922 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1923 if (numeric)
1924 hints.ai_flags = AI_NUMERICHOST;
1925 if (getaddrinfo(ps, NULL, &hints, &res0) != 0)
1926 goto error;
1927
1928 for (res = res0; res; res = res->ai_next) {
1929 if (res->ai_family != AF_INET &&
1930 res->ai_family != AF_INET6)
1931 continue;
1932 if (noalias) {
1933 if (res->ai_family == AF_INET) {
1934 if (got4)
1935 continue;
1936 got4 = 1;
1937 } else {
1938 if (got6)
1939 continue;
1940 got6 = 1;
1941 }
1942 }
1943 n = calloc(1, sizeof(struct node_host));
1944 if (n == NULL)
1945 err(1, "host_dns: calloc");
1946 n->ifname = NULL;
1947 n->af = res->ai_family;
1948 copy_satopfaddr(&n->addr.v.a.addr, res->ai_addr);
1949 if (res->ai_family == AF_INET6)
1950 n->ifindex =
1951 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1952 set_ipmask(n, mask);
1953 n->next = NULL;
1954 n->tail = n;
1955 if (h == NULL)
1956 h = n;
1957 else {
1958 h->tail->next = n;
1959 h->tail = n;
1960 }
1961 }
1962 freeaddrinfo(res0);
1963 error:
1964 free(ps);
1965
1966 return (h);
1967 }
1968
1969 /*
1970 * convert a hostname to a list of addresses and put them in the given buffer.
1971 * test:
1972 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1973 */
1974 int
append_addr(struct pfr_buffer * b,char * s,int test,int opts)1975 append_addr(struct pfr_buffer *b, char *s, int test, int opts)
1976 {
1977 char *r;
1978 struct node_host *h, *n;
1979 int rv, not = 0;
1980
1981 for (r = s; *r == '!'; r++)
1982 not = !not;
1983 if ((n = host(r, opts)) == NULL) {
1984 errno = 0;
1985 return (-1);
1986 }
1987 rv = append_addr_host(b, n, test, not);
1988 do {
1989 h = n;
1990 n = n->next;
1991 free(h);
1992 } while (n != NULL);
1993 return (rv);
1994 }
1995
1996 /*
1997 * same as previous function, but with a pre-parsed input and the ability
1998 * to "negate" the result. Does not free the node_host list.
1999 * not:
2000 * setting it to 1 is equivalent to adding "!" in front of parameter s.
2001 */
2002 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)2003 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
2004 {
2005 int bits;
2006 struct pfr_addr addr;
2007
2008 do {
2009 bzero(&addr, sizeof(addr));
2010 addr.pfra_not = n->not ^ not;
2011 addr.pfra_af = n->af;
2012 addr.pfra_net = unmask(&n->addr.v.a.mask);
2013 switch (n->af) {
2014 case AF_INET:
2015 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
2016 bits = 32;
2017 break;
2018 case AF_INET6:
2019 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
2020 sizeof(struct in6_addr));
2021 bits = 128;
2022 break;
2023 default:
2024 errno = EINVAL;
2025 return (-1);
2026 }
2027 if ((test && (not || addr.pfra_net != bits)) ||
2028 addr.pfra_net > bits) {
2029 errno = EINVAL;
2030 return (-1);
2031 }
2032 if (pfr_buf_add(b, &addr))
2033 return (-1);
2034 } while ((n = n->next) != NULL);
2035
2036 return (0);
2037 }
2038
2039 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)2040 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
2041 {
2042 struct pfioc_trans_e trans;
2043
2044 bzero(&trans, sizeof(trans));
2045 trans.rs_num = rs_num;
2046 if (strlcpy(trans.anchor, anchor,
2047 sizeof(trans.anchor)) >= sizeof(trans.anchor))
2048 errx(1, "pfctl_add_trans: strlcpy");
2049
2050 return pfr_buf_add(buf, &trans);
2051 }
2052
2053 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)2054 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
2055 {
2056 struct pfioc_trans_e *p;
2057
2058 PFRB_FOREACH(p, buf)
2059 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
2060 return (p->ticket);
2061 errx(1, "pfctl_get_ticket: assertion failed");
2062 }
2063
2064 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)2065 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
2066 {
2067 struct pfioc_trans trans;
2068
2069 bzero(&trans, sizeof(trans));
2070 trans.size = buf->pfrb_size - from;
2071 trans.esize = sizeof(struct pfioc_trans_e);
2072 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
2073 return ioctl(dev, cmd, &trans);
2074 }
2075