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/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #include <sys/types.h>
40 #include <sys/ioctl.h>
41 #include <sys/socket.h>
42 #include <sys/param.h>
43 #include <sys/proc.h>
44 #include <net/if.h>
45 #include <netinet/in.h>
46 #include <netinet/in_systm.h>
47 #include <netinet/ip.h>
48 #include <netinet/ip_icmp.h>
49 #include <netinet/icmp6.h>
50 #include <net/pfvar.h>
51 #include <arpa/inet.h>
52
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <ctype.h>
57 #include <netdb.h>
58 #include <stdarg.h>
59 #include <errno.h>
60 #include <err.h>
61 #include <ifaddrs.h>
62 #include <unistd.h>
63
64 #include "pfctl_parser.h"
65 #include "pfctl.h"
66
67 void print_op (u_int8_t, const char *, const char *);
68 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
69 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
70 void print_flags (u_int8_t);
71 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
72 struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
73 int ifa_skip_if(const char *filter, struct node_host *p);
74
75 struct node_host *ifa_grouplookup(const char *, int);
76 struct node_host *host_if(const char *, int);
77 struct node_host *host_v4(const char *, int);
78 struct node_host *host_v6(const char *, int);
79 struct node_host *host_dns(const char *, int, int);
80
81 const char *tcpflags = "FSRPAUEW";
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 };
139
140 static const struct icmpcodeent icmp_code[] = {
141 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
142 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
143 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
144 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
145 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
146 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
147 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
148 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
149 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
150 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
151 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
152 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
153 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
154 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
155 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
156 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
157 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
158 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
159 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
160 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
161 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
162 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
163 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
164 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
165 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
166 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
167 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
168 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
169 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
170 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
171 };
172
173 static const struct icmpcodeent icmp6_code[] = {
174 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
175 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
176 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
177 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
178 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
179 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
180 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
181 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
182 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
183 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
184 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
185 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
186 };
187
188 const struct pf_timeout pf_timeouts[] = {
189 { "tcp.first", PFTM_TCP_FIRST_PACKET },
190 { "tcp.opening", PFTM_TCP_OPENING },
191 { "tcp.established", PFTM_TCP_ESTABLISHED },
192 { "tcp.closing", PFTM_TCP_CLOSING },
193 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
194 { "tcp.closed", PFTM_TCP_CLOSED },
195 { "tcp.tsdiff", PFTM_TS_DIFF },
196 { "udp.first", PFTM_UDP_FIRST_PACKET },
197 { "udp.single", PFTM_UDP_SINGLE },
198 { "udp.multiple", PFTM_UDP_MULTIPLE },
199 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
200 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
201 { "other.first", PFTM_OTHER_FIRST_PACKET },
202 { "other.single", PFTM_OTHER_SINGLE },
203 { "other.multiple", PFTM_OTHER_MULTIPLE },
204 { "frag", PFTM_FRAG },
205 { "interval", PFTM_INTERVAL },
206 { "adaptive.start", PFTM_ADAPTIVE_START },
207 { "adaptive.end", PFTM_ADAPTIVE_END },
208 { "src.track", PFTM_SRC_NODE },
209 { NULL, 0 }
210 };
211
212 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)213 geticmptypebynumber(u_int8_t type, sa_family_t af)
214 {
215 unsigned int i;
216
217 if (af != AF_INET6) {
218 for (i=0; i < nitems(icmp_type); i++) {
219 if (type == icmp_type[i].type)
220 return (&icmp_type[i]);
221 }
222 } else {
223 for (i=0; i < nitems(icmp6_type); i++) {
224 if (type == icmp6_type[i].type)
225 return (&icmp6_type[i]);
226 }
227 }
228 return (NULL);
229 }
230
231 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)232 geticmptypebyname(char *w, sa_family_t af)
233 {
234 unsigned int i;
235
236 if (af != AF_INET6) {
237 for (i=0; i < nitems(icmp_type); i++) {
238 if (!strcmp(w, icmp_type[i].name))
239 return (&icmp_type[i]);
240 }
241 } else {
242 for (i=0; i < nitems(icmp6_type); i++) {
243 if (!strcmp(w, icmp6_type[i].name))
244 return (&icmp6_type[i]);
245 }
246 }
247 return (NULL);
248 }
249
250 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)251 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
252 {
253 unsigned int i;
254
255 if (af != AF_INET6) {
256 for (i=0; i < nitems(icmp_code); i++) {
257 if (type == icmp_code[i].type &&
258 code == icmp_code[i].code)
259 return (&icmp_code[i]);
260 }
261 } else {
262 for (i=0; i < nitems(icmp6_code); i++) {
263 if (type == icmp6_code[i].type &&
264 code == icmp6_code[i].code)
265 return (&icmp6_code[i]);
266 }
267 }
268 return (NULL);
269 }
270
271 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)272 geticmpcodebyname(u_long type, char *w, sa_family_t af)
273 {
274 unsigned int i;
275
276 if (af != AF_INET6) {
277 for (i=0; i < nitems(icmp_code); i++) {
278 if (type == icmp_code[i].type &&
279 !strcmp(w, icmp_code[i].name))
280 return (&icmp_code[i]);
281 }
282 } else {
283 for (i=0; i < nitems(icmp6_code); i++) {
284 if (type == icmp6_code[i].type &&
285 !strcmp(w, icmp6_code[i].name))
286 return (&icmp6_code[i]);
287 }
288 }
289 return (NULL);
290 }
291
292 void
print_op(u_int8_t op,const char * a1,const char * a2)293 print_op(u_int8_t op, const char *a1, const char *a2)
294 {
295 if (op == PF_OP_IRG)
296 printf(" %s >< %s", a1, a2);
297 else if (op == PF_OP_XRG)
298 printf(" %s <> %s", a1, a2);
299 else if (op == PF_OP_EQ)
300 printf(" = %s", a1);
301 else if (op == PF_OP_NE)
302 printf(" != %s", a1);
303 else if (op == PF_OP_LT)
304 printf(" < %s", a1);
305 else if (op == PF_OP_LE)
306 printf(" <= %s", a1);
307 else if (op == PF_OP_GT)
308 printf(" > %s", a1);
309 else if (op == PF_OP_GE)
310 printf(" >= %s", a1);
311 else if (op == PF_OP_RRG)
312 printf(" %s:%s", a1, a2);
313 }
314
315 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto,int numeric)316 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
317 {
318 char a1[6], a2[6];
319 struct servent *s;
320
321 if (!numeric)
322 s = getservbyport(p1, proto);
323 else
324 s = NULL;
325 p1 = ntohs(p1);
326 p2 = ntohs(p2);
327 snprintf(a1, sizeof(a1), "%u", p1);
328 snprintf(a2, sizeof(a2), "%u", p2);
329 printf(" port");
330 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
331 print_op(op, s->s_name, a2);
332 else
333 print_op(op, a1, a2);
334 }
335
336 void
print_ugid(u_int8_t op,unsigned u1,unsigned u2,const char * t,unsigned umax)337 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
338 {
339 char a1[11], a2[11];
340
341 snprintf(a1, sizeof(a1), "%u", u1);
342 snprintf(a2, sizeof(a2), "%u", u2);
343 printf(" %s", t);
344 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
345 print_op(op, "unknown", a2);
346 else
347 print_op(op, a1, a2);
348 }
349
350 void
print_flags(u_int8_t f)351 print_flags(u_int8_t f)
352 {
353 int i;
354
355 for (i = 0; tcpflags[i]; ++i)
356 if (f & (1 << i))
357 printf("%c", tcpflags[i]);
358 }
359
360 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)361 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
362 sa_family_t af, u_int8_t proto, int verbose, int numeric)
363 {
364 char buf[PF_OSFP_LEN*3];
365 if (src->addr.type == PF_ADDR_ADDRMASK &&
366 dst->addr.type == PF_ADDR_ADDRMASK &&
367 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
368 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
369 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
370 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
371 !src->neg && !dst->neg &&
372 !src->port_op && !dst->port_op &&
373 osfp == PF_OSFP_ANY)
374 printf(" all");
375 else {
376 printf(" from ");
377 if (src->neg)
378 printf("! ");
379 print_addr(&src->addr, af, verbose);
380 if (src->port_op)
381 print_port(src->port_op, src->port[0],
382 src->port[1],
383 proto == IPPROTO_TCP ? "tcp" : "udp",
384 numeric);
385 if (osfp != PF_OSFP_ANY)
386 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
387 sizeof(buf)));
388
389 printf(" to ");
390 if (dst->neg)
391 printf("! ");
392 print_addr(&dst->addr, af, verbose);
393 if (dst->port_op)
394 print_port(dst->port_op, dst->port[0],
395 dst->port[1],
396 proto == IPPROTO_TCP ? "tcp" : "udp",
397 numeric);
398 }
399 }
400
401 void
print_pool(struct pf_pool * pool,u_int16_t p1,u_int16_t p2,sa_family_t af,int id)402 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
403 sa_family_t af, int id)
404 {
405 struct pf_pooladdr *pooladdr;
406
407 if ((TAILQ_FIRST(&pool->list) != NULL) &&
408 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
409 printf("{ ");
410 TAILQ_FOREACH(pooladdr, &pool->list, entries){
411 switch (id) {
412 case PF_NAT:
413 case PF_RDR:
414 case PF_BINAT:
415 print_addr(&pooladdr->addr, af, 0);
416 break;
417 case PF_PASS:
418 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
419 printf("%s", pooladdr->ifname);
420 else {
421 printf("(%s ", pooladdr->ifname);
422 print_addr(&pooladdr->addr, af, 0);
423 printf(")");
424 }
425 break;
426 default:
427 break;
428 }
429 if (TAILQ_NEXT(pooladdr, entries) != NULL)
430 printf(", ");
431 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
432 printf(" }");
433 }
434 switch (id) {
435 case PF_NAT:
436 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
437 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
438 if (p1 == p2)
439 printf(" port %u", p1);
440 else
441 printf(" port %u:%u", p1, p2);
442 }
443 break;
444 case PF_RDR:
445 if (p1) {
446 printf(" port %u", p1);
447 if (p2 && (p2 != p1))
448 printf(":%u", p2);
449 }
450 break;
451 default:
452 break;
453 }
454 switch (pool->opts & PF_POOL_TYPEMASK) {
455 case PF_POOL_NONE:
456 break;
457 case PF_POOL_BITMASK:
458 printf(" bitmask");
459 break;
460 case PF_POOL_RANDOM:
461 printf(" random");
462 break;
463 case PF_POOL_SRCHASH:
464 printf(" source-hash 0x%08x%08x%08x%08x",
465 pool->key.key32[0], pool->key.key32[1],
466 pool->key.key32[2], pool->key.key32[3]);
467 break;
468 case PF_POOL_ROUNDROBIN:
469 printf(" round-robin");
470 break;
471 }
472 if (pool->opts & PF_POOL_STICKYADDR)
473 printf(" sticky-address");
474 if (id == PF_NAT && p1 == 0 && p2 == 0)
475 printf(" static-port");
476 }
477
478 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
479 const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
480 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
481 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
482
483 void
print_status(struct pf_status * s,int opts)484 print_status(struct pf_status *s, int opts)
485 {
486 char statline[80], *running;
487 time_t runtime;
488 int i;
489 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
490 static const char hex[] = "0123456789abcdef";
491
492 runtime = time(NULL) - s->since;
493 running = s->running ? "Enabled" : "Disabled";
494
495 if (s->since) {
496 unsigned int sec, min, hrs, day = runtime;
497
498 sec = day % 60;
499 day /= 60;
500 min = day % 60;
501 day /= 60;
502 hrs = day % 24;
503 day /= 24;
504 snprintf(statline, sizeof(statline),
505 "Status: %s for %u days %.2u:%.2u:%.2u",
506 running, day, hrs, min, sec);
507 } else
508 snprintf(statline, sizeof(statline), "Status: %s", running);
509 printf("%-44s", statline);
510 switch (s->debug) {
511 case PF_DEBUG_NONE:
512 printf("%15s\n\n", "Debug: None");
513 break;
514 case PF_DEBUG_URGENT:
515 printf("%15s\n\n", "Debug: Urgent");
516 break;
517 case PF_DEBUG_MISC:
518 printf("%15s\n\n", "Debug: Misc");
519 break;
520 case PF_DEBUG_NOISY:
521 printf("%15s\n\n", "Debug: Loud");
522 break;
523 }
524
525 if (opts & PF_OPT_VERBOSE) {
526 printf("Hostid: 0x%08x\n", ntohl(s->hostid));
527
528 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
529 buf[i + i] = hex[s->pf_chksum[i] >> 4];
530 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
531 }
532 buf[i + i] = '\0';
533 printf("Checksum: 0x%s\n\n", buf);
534 }
535
536 if (s->ifname[0] != 0) {
537 printf("Interface Stats for %-16s %5s %16s\n",
538 s->ifname, "IPv4", "IPv6");
539 printf(" %-25s %14llu %16llu\n", "Bytes In",
540 (unsigned long long)s->bcounters[0][0],
541 (unsigned long long)s->bcounters[1][0]);
542 printf(" %-25s %14llu %16llu\n", "Bytes Out",
543 (unsigned long long)s->bcounters[0][1],
544 (unsigned long long)s->bcounters[1][1]);
545 printf(" Packets In\n");
546 printf(" %-23s %14llu %16llu\n", "Passed",
547 (unsigned long long)s->pcounters[0][0][PF_PASS],
548 (unsigned long long)s->pcounters[1][0][PF_PASS]);
549 printf(" %-23s %14llu %16llu\n", "Blocked",
550 (unsigned long long)s->pcounters[0][0][PF_DROP],
551 (unsigned long long)s->pcounters[1][0][PF_DROP]);
552 printf(" Packets Out\n");
553 printf(" %-23s %14llu %16llu\n", "Passed",
554 (unsigned long long)s->pcounters[0][1][PF_PASS],
555 (unsigned long long)s->pcounters[1][1][PF_PASS]);
556 printf(" %-23s %14llu %16llu\n\n", "Blocked",
557 (unsigned long long)s->pcounters[0][1][PF_DROP],
558 (unsigned long long)s->pcounters[1][1][PF_DROP]);
559 }
560 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
561 printf(" %-25s %14u %14s\n", "current entries", s->states, "");
562 for (i = 0; i < FCNT_MAX; i++) {
563 printf(" %-25s %14llu ", pf_fcounters[i],
564 (unsigned long long)s->fcounters[i]);
565 if (runtime > 0)
566 printf("%14.1f/s\n",
567 (double)s->fcounters[i] / (double)runtime);
568 else
569 printf("%14s\n", "");
570 }
571 if (opts & PF_OPT_VERBOSE) {
572 printf("Source Tracking Table\n");
573 printf(" %-25s %14u %14s\n", "current entries",
574 s->src_nodes, "");
575 for (i = 0; i < SCNT_MAX; i++) {
576 printf(" %-25s %14lld ", pf_scounters[i],
577 #ifdef __FreeBSD__
578 (long long)s->scounters[i]);
579 #else
580 s->scounters[i]);
581 #endif
582 if (runtime > 0)
583 printf("%14.1f/s\n",
584 (double)s->scounters[i] / (double)runtime);
585 else
586 printf("%14s\n", "");
587 }
588 }
589 printf("Counters\n");
590 for (i = 0; i < PFRES_MAX; i++) {
591 printf(" %-25s %14llu ", pf_reasons[i],
592 (unsigned long long)s->counters[i]);
593 if (runtime > 0)
594 printf("%14.1f/s\n",
595 (double)s->counters[i] / (double)runtime);
596 else
597 printf("%14s\n", "");
598 }
599 if (opts & PF_OPT_VERBOSE) {
600 printf("Limit Counters\n");
601 for (i = 0; i < LCNT_MAX; i++) {
602 printf(" %-25s %14lld ", pf_lcounters[i],
603 #ifdef __FreeBSD__
604 (unsigned long long)s->lcounters[i]);
605 #else
606 s->lcounters[i]);
607 #endif
608 if (runtime > 0)
609 printf("%14.1f/s\n",
610 (double)s->lcounters[i] / (double)runtime);
611 else
612 printf("%14s\n", "");
613 }
614 }
615 }
616
617 void
print_running(struct pf_status * status)618 print_running(struct pf_status *status)
619 {
620 printf("%s\n", status->running ? "Enabled" : "Disabled");
621 }
622
623 void
print_src_node(struct pf_src_node * sn,int opts)624 print_src_node(struct pf_src_node *sn, int opts)
625 {
626 struct pf_addr_wrap aw;
627 int min, sec;
628
629 memset(&aw, 0, sizeof(aw));
630 if (sn->af == AF_INET)
631 aw.v.a.mask.addr32[0] = 0xffffffff;
632 else
633 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
634
635 aw.v.a.addr = sn->addr;
636 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
637 printf(" -> ");
638 aw.v.a.addr = sn->raddr;
639 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
640 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
641 sn->conn, sn->conn_rate.count / 1000,
642 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
643 if (opts & PF_OPT_VERBOSE) {
644 sec = sn->creation % 60;
645 sn->creation /= 60;
646 min = sn->creation % 60;
647 sn->creation /= 60;
648 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
649 if (sn->states == 0) {
650 sec = sn->expire % 60;
651 sn->expire /= 60;
652 min = sn->expire % 60;
653 sn->expire /= 60;
654 printf(", expires in %.2u:%.2u:%.2u",
655 sn->expire, min, sec);
656 }
657 printf(", %llu pkts, %llu bytes",
658 #ifdef __FreeBSD__
659 (unsigned long long)(sn->packets[0] + sn->packets[1]),
660 (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
661 #else
662 sn->packets[0] + sn->packets[1],
663 sn->bytes[0] + sn->bytes[1]);
664 #endif
665 switch (sn->ruletype) {
666 case PF_NAT:
667 if (sn->rule.nr != -1)
668 printf(", nat rule %u", sn->rule.nr);
669 break;
670 case PF_RDR:
671 if (sn->rule.nr != -1)
672 printf(", rdr rule %u", sn->rule.nr);
673 break;
674 case PF_PASS:
675 if (sn->rule.nr != -1)
676 printf(", filter rule %u", sn->rule.nr);
677 break;
678 }
679 printf("\n");
680 }
681 }
682
683 void
print_rule(struct pf_rule * r,const char * anchor_call,int verbose,int numeric)684 print_rule(struct pf_rule *r, const char *anchor_call, int verbose, int numeric)
685 {
686 static const char *actiontypes[] = { "pass", "block", "scrub",
687 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
688 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
689 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
690 "binat-anchor", "rdr-anchor", "rdr-anchor" };
691 int i, opts;
692
693 if (verbose)
694 printf("@%d ", r->nr);
695 if (r->action > PF_NORDR)
696 printf("action(%d)", r->action);
697 else if (anchor_call[0]) {
698 if (anchor_call[0] == '_') {
699 printf("%s", anchortypes[r->action]);
700 } else
701 printf("%s \"%s\"", anchortypes[r->action],
702 anchor_call);
703 } else {
704 printf("%s", actiontypes[r->action]);
705 if (r->natpass)
706 printf(" pass");
707 }
708 if (r->action == PF_DROP) {
709 if (r->rule_flag & PFRULE_RETURN)
710 printf(" return");
711 else if (r->rule_flag & PFRULE_RETURNRST) {
712 if (!r->return_ttl)
713 printf(" return-rst");
714 else
715 printf(" return-rst(ttl %d)", r->return_ttl);
716 } else if (r->rule_flag & PFRULE_RETURNICMP) {
717 const struct icmpcodeent *ic, *ic6;
718
719 ic = geticmpcodebynumber(r->return_icmp >> 8,
720 r->return_icmp & 255, AF_INET);
721 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
722 r->return_icmp6 & 255, AF_INET6);
723
724 switch (r->af) {
725 case AF_INET:
726 printf(" return-icmp");
727 if (ic == NULL)
728 printf("(%u)", r->return_icmp & 255);
729 else
730 printf("(%s)", ic->name);
731 break;
732 case AF_INET6:
733 printf(" return-icmp6");
734 if (ic6 == NULL)
735 printf("(%u)", r->return_icmp6 & 255);
736 else
737 printf("(%s)", ic6->name);
738 break;
739 default:
740 printf(" return-icmp");
741 if (ic == NULL)
742 printf("(%u, ", r->return_icmp & 255);
743 else
744 printf("(%s, ", ic->name);
745 if (ic6 == NULL)
746 printf("%u)", r->return_icmp6 & 255);
747 else
748 printf("%s)", ic6->name);
749 break;
750 }
751 } else
752 printf(" drop");
753 }
754 if (r->direction == PF_IN)
755 printf(" in");
756 else if (r->direction == PF_OUT)
757 printf(" out");
758 if (r->log) {
759 printf(" log");
760 if (r->log & ~PF_LOG || r->logif) {
761 int count = 0;
762
763 printf(" (");
764 if (r->log & PF_LOG_ALL)
765 printf("%sall", count++ ? ", " : "");
766 if (r->log & PF_LOG_SOCKET_LOOKUP)
767 printf("%suser", count++ ? ", " : "");
768 if (r->logif)
769 printf("%sto pflog%u", count++ ? ", " : "",
770 r->logif);
771 printf(")");
772 }
773 }
774 if (r->quick)
775 printf(" quick");
776 if (r->ifname[0]) {
777 if (r->ifnot)
778 printf(" on ! %s", r->ifname);
779 else
780 printf(" on %s", r->ifname);
781 }
782 if (r->rt) {
783 if (r->rt == PF_ROUTETO)
784 printf(" route-to");
785 else if (r->rt == PF_REPLYTO)
786 printf(" reply-to");
787 else if (r->rt == PF_DUPTO)
788 printf(" dup-to");
789 else if (r->rt == PF_FASTROUTE)
790 printf(" fastroute");
791 if (r->rt != PF_FASTROUTE) {
792 printf(" ");
793 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
794 }
795 }
796 if (r->af) {
797 if (r->af == AF_INET)
798 printf(" inet");
799 else
800 printf(" inet6");
801 }
802 if (r->proto) {
803 struct protoent *p;
804
805 if ((p = getprotobynumber(r->proto)) != NULL)
806 printf(" proto %s", p->p_name);
807 else
808 printf(" proto %u", r->proto);
809 }
810 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
811 verbose, numeric);
812 if (r->uid.op)
813 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
814 UID_MAX);
815 if (r->gid.op)
816 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
817 GID_MAX);
818 if (r->flags || r->flagset) {
819 printf(" flags ");
820 print_flags(r->flags);
821 printf("/");
822 print_flags(r->flagset);
823 } else if (r->action == PF_PASS &&
824 (!r->proto || r->proto == IPPROTO_TCP) &&
825 !(r->rule_flag & PFRULE_FRAGMENT) &&
826 !anchor_call[0] && r->keep_state)
827 printf(" flags any");
828 if (r->type) {
829 const struct icmptypeent *it;
830
831 it = geticmptypebynumber(r->type-1, r->af);
832 if (r->af != AF_INET6)
833 printf(" icmp-type");
834 else
835 printf(" icmp6-type");
836 if (it != NULL)
837 printf(" %s", it->name);
838 else
839 printf(" %u", r->type-1);
840 if (r->code) {
841 const struct icmpcodeent *ic;
842
843 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
844 if (ic != NULL)
845 printf(" code %s", ic->name);
846 else
847 printf(" code %u", r->code-1);
848 }
849 }
850 if (r->tos)
851 printf(" tos 0x%2.2x", r->tos);
852 if (r->prio)
853 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
854 if (r->scrub_flags & PFSTATE_SETMASK) {
855 char *comma = "";
856 printf(" set (");
857 if (r->scrub_flags & PFSTATE_SETPRIO) {
858 if (r->set_prio[0] == r->set_prio[1])
859 printf("%s prio %u", comma, r->set_prio[0]);
860 else
861 printf("%s prio(%u, %u)", comma, r->set_prio[0],
862 r->set_prio[1]);
863 comma = ",";
864 }
865 printf(" )");
866 }
867 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
868 printf(" no state");
869 else if (r->keep_state == PF_STATE_NORMAL)
870 printf(" keep state");
871 else if (r->keep_state == PF_STATE_MODULATE)
872 printf(" modulate state");
873 else if (r->keep_state == PF_STATE_SYNPROXY)
874 printf(" synproxy state");
875 if (r->prob) {
876 char buf[20];
877
878 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
879 for (i = strlen(buf)-1; i > 0; i--) {
880 if (buf[i] == '0')
881 buf[i] = '\0';
882 else {
883 if (buf[i] == '.')
884 buf[i] = '\0';
885 break;
886 }
887 }
888 printf(" probability %s%%", buf);
889 }
890 opts = 0;
891 if (r->max_states || r->max_src_nodes || r->max_src_states)
892 opts = 1;
893 if (r->rule_flag & PFRULE_NOSYNC)
894 opts = 1;
895 if (r->rule_flag & PFRULE_SRCTRACK)
896 opts = 1;
897 if (r->rule_flag & PFRULE_IFBOUND)
898 opts = 1;
899 if (r->rule_flag & PFRULE_STATESLOPPY)
900 opts = 1;
901 for (i = 0; !opts && i < PFTM_MAX; ++i)
902 if (r->timeout[i])
903 opts = 1;
904 if (opts) {
905 printf(" (");
906 if (r->max_states) {
907 printf("max %u", r->max_states);
908 opts = 0;
909 }
910 if (r->rule_flag & PFRULE_NOSYNC) {
911 if (!opts)
912 printf(", ");
913 printf("no-sync");
914 opts = 0;
915 }
916 if (r->rule_flag & PFRULE_SRCTRACK) {
917 if (!opts)
918 printf(", ");
919 printf("source-track");
920 if (r->rule_flag & PFRULE_RULESRCTRACK)
921 printf(" rule");
922 else
923 printf(" global");
924 opts = 0;
925 }
926 if (r->max_src_states) {
927 if (!opts)
928 printf(", ");
929 printf("max-src-states %u", r->max_src_states);
930 opts = 0;
931 }
932 if (r->max_src_conn) {
933 if (!opts)
934 printf(", ");
935 printf("max-src-conn %u", r->max_src_conn);
936 opts = 0;
937 }
938 if (r->max_src_conn_rate.limit) {
939 if (!opts)
940 printf(", ");
941 printf("max-src-conn-rate %u/%u",
942 r->max_src_conn_rate.limit,
943 r->max_src_conn_rate.seconds);
944 opts = 0;
945 }
946 if (r->max_src_nodes) {
947 if (!opts)
948 printf(", ");
949 printf("max-src-nodes %u", r->max_src_nodes);
950 opts = 0;
951 }
952 if (r->overload_tblname[0]) {
953 if (!opts)
954 printf(", ");
955 printf("overload <%s>", r->overload_tblname);
956 if (r->flush)
957 printf(" flush");
958 if (r->flush & PF_FLUSH_GLOBAL)
959 printf(" global");
960 }
961 if (r->rule_flag & PFRULE_IFBOUND) {
962 if (!opts)
963 printf(", ");
964 printf("if-bound");
965 opts = 0;
966 }
967 if (r->rule_flag & PFRULE_STATESLOPPY) {
968 if (!opts)
969 printf(", ");
970 printf("sloppy");
971 opts = 0;
972 }
973 for (i = 0; i < PFTM_MAX; ++i)
974 if (r->timeout[i]) {
975 int j;
976
977 if (!opts)
978 printf(", ");
979 opts = 0;
980 for (j = 0; pf_timeouts[j].name != NULL;
981 ++j)
982 if (pf_timeouts[j].timeout == i)
983 break;
984 printf("%s %u", pf_timeouts[j].name == NULL ?
985 "inv.timeout" : pf_timeouts[j].name,
986 r->timeout[i]);
987 }
988 printf(")");
989 }
990 if (r->rule_flag & PFRULE_FRAGMENT)
991 printf(" fragment");
992 if (r->rule_flag & PFRULE_NODF)
993 printf(" no-df");
994 if (r->rule_flag & PFRULE_RANDOMID)
995 printf(" random-id");
996 if (r->min_ttl)
997 printf(" min-ttl %d", r->min_ttl);
998 if (r->max_mss)
999 printf(" max-mss %d", r->max_mss);
1000 if (r->rule_flag & PFRULE_SET_TOS)
1001 printf(" set-tos 0x%2.2x", r->set_tos);
1002 if (r->allow_opts)
1003 printf(" allow-opts");
1004 if (r->action == PF_SCRUB) {
1005 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1006 printf(" reassemble tcp");
1007
1008 printf(" fragment reassemble");
1009 }
1010 if (r->label[0])
1011 printf(" label \"%s\"", r->label);
1012 if (r->qname[0] && r->pqname[0])
1013 printf(" queue(%s, %s)", r->qname, r->pqname);
1014 else if (r->qname[0])
1015 printf(" queue %s", r->qname);
1016 if (r->tagname[0])
1017 printf(" tag %s", r->tagname);
1018 if (r->match_tagname[0]) {
1019 if (r->match_tag_not)
1020 printf(" !");
1021 printf(" tagged %s", r->match_tagname);
1022 }
1023 if (r->rtableid != -1)
1024 printf(" rtable %u", r->rtableid);
1025 if (r->divert.port) {
1026 #ifdef __FreeBSD__
1027 printf(" divert-to %u", ntohs(r->divert.port));
1028 #else
1029 if (PF_AZERO(&r->divert.addr, r->af)) {
1030 printf(" divert-reply");
1031 } else {
1032 /* XXX cut&paste from print_addr */
1033 char buf[48];
1034
1035 printf(" divert-to ");
1036 if (inet_ntop(r->af, &r->divert.addr, buf,
1037 sizeof(buf)) == NULL)
1038 printf("?");
1039 else
1040 printf("%s", buf);
1041 printf(" port %u", ntohs(r->divert.port));
1042 }
1043 #endif
1044 }
1045 if (!anchor_call[0] && (r->action == PF_NAT ||
1046 r->action == PF_BINAT || r->action == PF_RDR)) {
1047 printf(" -> ");
1048 print_pool(&r->rpool, r->rpool.proxy_port[0],
1049 r->rpool.proxy_port[1], r->af, r->action);
1050 }
1051 }
1052
1053 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1054 print_tabledef(const char *name, int flags, int addrs,
1055 struct node_tinithead *nodes)
1056 {
1057 struct node_tinit *ti, *nti;
1058 struct node_host *h;
1059
1060 printf("table <%s>", name);
1061 if (flags & PFR_TFLAG_CONST)
1062 printf(" const");
1063 if (flags & PFR_TFLAG_PERSIST)
1064 printf(" persist");
1065 if (flags & PFR_TFLAG_COUNTERS)
1066 printf(" counters");
1067 SIMPLEQ_FOREACH(ti, nodes, entries) {
1068 if (ti->file) {
1069 printf(" file \"%s\"", ti->file);
1070 continue;
1071 }
1072 printf(" {");
1073 for (;;) {
1074 for (h = ti->host; h != NULL; h = h->next) {
1075 printf(h->not ? " !" : " ");
1076 print_addr(&h->addr, h->af, 0);
1077 }
1078 nti = SIMPLEQ_NEXT(ti, entries);
1079 if (nti != NULL && nti->file == NULL)
1080 ti = nti; /* merge lists */
1081 else
1082 break;
1083 }
1084 printf(" }");
1085 }
1086 if (addrs && SIMPLEQ_EMPTY(nodes))
1087 printf(" { }");
1088 printf("\n");
1089 }
1090
1091 int
parse_flags(char * s)1092 parse_flags(char *s)
1093 {
1094 char *p, *q;
1095 u_int8_t f = 0;
1096
1097 for (p = s; *p; p++) {
1098 if ((q = strchr(tcpflags, *p)) == NULL)
1099 return -1;
1100 else
1101 f |= 1 << (q - tcpflags);
1102 }
1103 return (f ? f : PF_TH_ALL);
1104 }
1105
1106 void
set_ipmask(struct node_host * h,u_int8_t b)1107 set_ipmask(struct node_host *h, u_int8_t b)
1108 {
1109 struct pf_addr *m, *n;
1110 int i, j = 0;
1111
1112 m = &h->addr.v.a.mask;
1113 memset(m, 0, sizeof(*m));
1114
1115 while (b >= 32) {
1116 m->addr32[j++] = 0xffffffff;
1117 b -= 32;
1118 }
1119 for (i = 31; i > 31-b; --i)
1120 m->addr32[j] |= (1 << i);
1121 if (b)
1122 m->addr32[j] = htonl(m->addr32[j]);
1123
1124 /* Mask off bits of the address that will never be used. */
1125 n = &h->addr.v.a.addr;
1126 if (h->addr.type == PF_ADDR_ADDRMASK)
1127 for (i = 0; i < 4; i++)
1128 n->addr32[i] = n->addr32[i] & m->addr32[i];
1129 }
1130
1131 int
check_netmask(struct node_host * h,sa_family_t af)1132 check_netmask(struct node_host *h, sa_family_t af)
1133 {
1134 struct node_host *n = NULL;
1135 struct pf_addr *m;
1136
1137 for (n = h; n != NULL; n = n->next) {
1138 if (h->addr.type == PF_ADDR_TABLE)
1139 continue;
1140 m = &h->addr.v.a.mask;
1141 /* fix up netmask for dynaddr */
1142 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1143 unmask(m, AF_INET6) > 32)
1144 set_ipmask(n, 32);
1145 /* netmasks > 32 bit are invalid on v4 */
1146 if (af == AF_INET &&
1147 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1148 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1149 unmask(m, AF_INET6));
1150 return (1);
1151 }
1152 }
1153 return (0);
1154 }
1155
1156 /* interface lookup routines */
1157
1158 struct node_host *iftab;
1159
1160 void
ifa_load(void)1161 ifa_load(void)
1162 {
1163 struct ifaddrs *ifap, *ifa;
1164 struct node_host *n = NULL, *h = NULL;
1165
1166 if (getifaddrs(&ifap) < 0)
1167 err(1, "getifaddrs");
1168
1169 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1170 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1171 ifa->ifa_addr->sa_family == AF_INET6 ||
1172 ifa->ifa_addr->sa_family == AF_LINK))
1173 continue;
1174 n = calloc(1, sizeof(struct node_host));
1175 if (n == NULL)
1176 err(1, "address: calloc");
1177 n->af = ifa->ifa_addr->sa_family;
1178 n->ifa_flags = ifa->ifa_flags;
1179 #ifdef __KAME__
1180 if (n->af == AF_INET6 &&
1181 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1182 ifa->ifa_addr)->sin6_addr) &&
1183 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1184 0) {
1185 struct sockaddr_in6 *sin6;
1186
1187 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1188 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1189 sin6->sin6_addr.s6_addr[3];
1190 sin6->sin6_addr.s6_addr[2] = 0;
1191 sin6->sin6_addr.s6_addr[3] = 0;
1192 }
1193 #endif
1194 n->ifindex = 0;
1195 if (n->af == AF_INET) {
1196 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1197 ifa->ifa_addr)->sin_addr.s_addr,
1198 sizeof(struct in_addr));
1199 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1200 ifa->ifa_netmask)->sin_addr.s_addr,
1201 sizeof(struct in_addr));
1202 if (ifa->ifa_broadaddr != NULL)
1203 memcpy(&n->bcast, &((struct sockaddr_in *)
1204 ifa->ifa_broadaddr)->sin_addr.s_addr,
1205 sizeof(struct in_addr));
1206 if (ifa->ifa_dstaddr != NULL)
1207 memcpy(&n->peer, &((struct sockaddr_in *)
1208 ifa->ifa_dstaddr)->sin_addr.s_addr,
1209 sizeof(struct in_addr));
1210 } else if (n->af == AF_INET6) {
1211 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1212 ifa->ifa_addr)->sin6_addr.s6_addr,
1213 sizeof(struct in6_addr));
1214 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1215 ifa->ifa_netmask)->sin6_addr.s6_addr,
1216 sizeof(struct in6_addr));
1217 if (ifa->ifa_broadaddr != NULL)
1218 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1219 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1220 sizeof(struct in6_addr));
1221 if (ifa->ifa_dstaddr != NULL)
1222 memcpy(&n->peer, &((struct sockaddr_in6 *)
1223 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1224 sizeof(struct in6_addr));
1225 n->ifindex = ((struct sockaddr_in6 *)
1226 ifa->ifa_addr)->sin6_scope_id;
1227 }
1228 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1229 err(1, "ifa_load: strdup");
1230 n->next = NULL;
1231 n->tail = n;
1232 if (h == NULL)
1233 h = n;
1234 else {
1235 h->tail->next = n;
1236 h->tail = n;
1237 }
1238 }
1239
1240 iftab = h;
1241 freeifaddrs(ifap);
1242 }
1243
1244 int
get_socket_domain(void)1245 get_socket_domain(void)
1246 {
1247 int sdom;
1248
1249 sdom = AF_UNSPEC;
1250 #ifdef WITH_INET6
1251 if (sdom == AF_UNSPEC && feature_present("inet6"))
1252 sdom = AF_INET6;
1253 #endif
1254 #ifdef WITH_INET
1255 if (sdom == AF_UNSPEC && feature_present("inet"))
1256 sdom = AF_INET;
1257 #endif
1258 if (sdom == AF_UNSPEC)
1259 sdom = AF_LINK;
1260
1261 return (sdom);
1262 }
1263
1264 struct node_host *
ifa_exists(const char * ifa_name)1265 ifa_exists(const char *ifa_name)
1266 {
1267 struct node_host *n;
1268 struct ifgroupreq ifgr;
1269 int s;
1270
1271 if (iftab == NULL)
1272 ifa_load();
1273
1274 /* check wether this is a group */
1275 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1276 err(1, "socket");
1277 bzero(&ifgr, sizeof(ifgr));
1278 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1279 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1280 /* fake a node_host */
1281 if ((n = calloc(1, sizeof(*n))) == NULL)
1282 err(1, "calloc");
1283 if ((n->ifname = strdup(ifa_name)) == NULL)
1284 err(1, "strdup");
1285 close(s);
1286 return (n);
1287 }
1288 close(s);
1289
1290 for (n = iftab; n; n = n->next) {
1291 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1292 return (n);
1293 }
1294
1295 return (NULL);
1296 }
1297
1298 struct node_host *
ifa_grouplookup(const char * ifa_name,int flags)1299 ifa_grouplookup(const char *ifa_name, int flags)
1300 {
1301 struct ifg_req *ifg;
1302 struct ifgroupreq ifgr;
1303 int s, len;
1304 struct node_host *n, *h = NULL;
1305
1306 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1307 err(1, "socket");
1308 bzero(&ifgr, sizeof(ifgr));
1309 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1310 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1311 close(s);
1312 return (NULL);
1313 }
1314
1315 len = ifgr.ifgr_len;
1316 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1317 err(1, "calloc");
1318 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1319 err(1, "SIOCGIFGMEMB");
1320
1321 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1322 ifg++) {
1323 len -= sizeof(struct ifg_req);
1324 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1325 continue;
1326 if (h == NULL)
1327 h = n;
1328 else {
1329 h->tail->next = n;
1330 h->tail = n->tail;
1331 }
1332 }
1333 free(ifgr.ifgr_groups);
1334 close(s);
1335
1336 return (h);
1337 }
1338
1339 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1340 ifa_lookup(const char *ifa_name, int flags)
1341 {
1342 struct node_host *p = NULL, *h = NULL, *n = NULL;
1343 int got4 = 0, got6 = 0;
1344 const char *last_if = NULL;
1345
1346 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1347 return (h);
1348
1349 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1350 ifa_name = NULL;
1351
1352 if (iftab == NULL)
1353 ifa_load();
1354
1355 for (p = iftab; p; p = p->next) {
1356 if (ifa_skip_if(ifa_name, p))
1357 continue;
1358 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1359 continue;
1360 if ((flags & PFI_AFLAG_BROADCAST) &&
1361 !(p->ifa_flags & IFF_BROADCAST))
1362 continue;
1363 if ((flags & PFI_AFLAG_PEER) &&
1364 !(p->ifa_flags & IFF_POINTOPOINT))
1365 continue;
1366 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1367 continue;
1368 if (last_if == NULL || strcmp(last_if, p->ifname))
1369 got4 = got6 = 0;
1370 last_if = p->ifname;
1371 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1372 continue;
1373 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1374 continue;
1375 if (p->af == AF_INET)
1376 got4 = 1;
1377 else
1378 got6 = 1;
1379 n = calloc(1, sizeof(struct node_host));
1380 if (n == NULL)
1381 err(1, "address: calloc");
1382 n->af = p->af;
1383 if (flags & PFI_AFLAG_BROADCAST)
1384 memcpy(&n->addr.v.a.addr, &p->bcast,
1385 sizeof(struct pf_addr));
1386 else if (flags & PFI_AFLAG_PEER)
1387 memcpy(&n->addr.v.a.addr, &p->peer,
1388 sizeof(struct pf_addr));
1389 else
1390 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1391 sizeof(struct pf_addr));
1392 if (flags & PFI_AFLAG_NETWORK)
1393 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1394 else {
1395 if (n->af == AF_INET) {
1396 if (p->ifa_flags & IFF_LOOPBACK &&
1397 p->ifa_flags & IFF_LINK1)
1398 memcpy(&n->addr.v.a.mask,
1399 &p->addr.v.a.mask,
1400 sizeof(struct pf_addr));
1401 else
1402 set_ipmask(n, 32);
1403 } else
1404 set_ipmask(n, 128);
1405 }
1406 n->ifindex = p->ifindex;
1407 n->ifname = strdup(p->ifname);
1408
1409 n->next = NULL;
1410 n->tail = n;
1411 if (h == NULL)
1412 h = n;
1413 else {
1414 h->tail->next = n;
1415 h->tail = n;
1416 }
1417 }
1418 return (h);
1419 }
1420
1421 int
ifa_skip_if(const char * filter,struct node_host * p)1422 ifa_skip_if(const char *filter, struct node_host *p)
1423 {
1424 int n;
1425
1426 if (p->af != AF_INET && p->af != AF_INET6)
1427 return (1);
1428 if (filter == NULL || !*filter)
1429 return (0);
1430 if (!strcmp(p->ifname, filter))
1431 return (0); /* exact match */
1432 n = strlen(filter);
1433 if (n < 1 || n >= IFNAMSIZ)
1434 return (1); /* sanity check */
1435 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1436 return (1); /* only do exact match in that case */
1437 if (strncmp(p->ifname, filter, n))
1438 return (1); /* prefix doesn't match */
1439 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1440 }
1441
1442
1443 struct node_host *
host(const char * s)1444 host(const char *s)
1445 {
1446 struct node_host *h = NULL;
1447 int mask, v4mask, v6mask, cont = 1;
1448 char *p, *q, *ps;
1449
1450 if ((p = strrchr(s, '/')) != NULL) {
1451 mask = strtol(p+1, &q, 0);
1452 if (!q || *q || mask > 128 || q == (p+1)) {
1453 fprintf(stderr, "invalid netmask '%s'\n", p);
1454 return (NULL);
1455 }
1456 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1457 err(1, "host: malloc");
1458 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1459 v4mask = v6mask = mask;
1460 } else {
1461 if ((ps = strdup(s)) == NULL)
1462 err(1, "host: strdup");
1463 v4mask = 32;
1464 v6mask = 128;
1465 mask = -1;
1466 }
1467
1468 /* IPv4 address? */
1469 if (cont && (h = host_v4(s, mask)) != NULL)
1470 cont = 0;
1471
1472 /* IPv6 address? */
1473 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1474 cont = 0;
1475
1476 /* interface with this name exists? */
1477 /* expensive with thousands of interfaces - prioritze IPv4/6 check */
1478 if (cont && (h = host_if(ps, mask)) != NULL)
1479 cont = 0;
1480
1481 /* dns lookup */
1482 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1483 cont = 0;
1484 free(ps);
1485
1486 if (h == NULL || cont == 1) {
1487 fprintf(stderr, "no IP address found for %s\n", s);
1488 return (NULL);
1489 }
1490 return (h);
1491 }
1492
1493 struct node_host *
host_if(const char * s,int mask)1494 host_if(const char *s, int mask)
1495 {
1496 struct node_host *n, *h = NULL;
1497 char *p, *ps;
1498 int flags = 0;
1499
1500 if ((ps = strdup(s)) == NULL)
1501 err(1, "host_if: strdup");
1502 while ((p = strrchr(ps, ':')) != NULL) {
1503 if (!strcmp(p+1, "network"))
1504 flags |= PFI_AFLAG_NETWORK;
1505 else if (!strcmp(p+1, "broadcast"))
1506 flags |= PFI_AFLAG_BROADCAST;
1507 else if (!strcmp(p+1, "peer"))
1508 flags |= PFI_AFLAG_PEER;
1509 else if (!strcmp(p+1, "0"))
1510 flags |= PFI_AFLAG_NOALIAS;
1511 else {
1512 free(ps);
1513 return (NULL);
1514 }
1515 *p = '\0';
1516 }
1517 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1518 fprintf(stderr, "illegal combination of interface modifiers\n");
1519 free(ps);
1520 return (NULL);
1521 }
1522 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1523 fprintf(stderr, "network or broadcast lookup, but "
1524 "extra netmask given\n");
1525 free(ps);
1526 return (NULL);
1527 }
1528 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1529 /* interface with this name exists */
1530 h = ifa_lookup(ps, flags);
1531 for (n = h; n != NULL && mask > -1; n = n->next)
1532 set_ipmask(n, mask);
1533 }
1534
1535 free(ps);
1536 return (h);
1537 }
1538
1539 struct node_host *
host_v4(const char * s,int mask)1540 host_v4(const char *s, int mask)
1541 {
1542 struct node_host *h = NULL;
1543 struct in_addr ina;
1544 int bits = 32;
1545
1546 memset(&ina, 0, sizeof(struct in_addr));
1547 if (strrchr(s, '/') != NULL) {
1548 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1549 return (NULL);
1550 } else {
1551 if (inet_pton(AF_INET, s, &ina) != 1)
1552 return (NULL);
1553 }
1554
1555 h = calloc(1, sizeof(struct node_host));
1556 if (h == NULL)
1557 err(1, "address: calloc");
1558 h->ifname = NULL;
1559 h->af = AF_INET;
1560 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1561 set_ipmask(h, bits);
1562 h->next = NULL;
1563 h->tail = h;
1564
1565 return (h);
1566 }
1567
1568 struct node_host *
host_v6(const char * s,int mask)1569 host_v6(const char *s, int mask)
1570 {
1571 struct addrinfo hints, *res;
1572 struct node_host *h = NULL;
1573
1574 memset(&hints, 0, sizeof(hints));
1575 hints.ai_family = AF_INET6;
1576 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1577 hints.ai_flags = AI_NUMERICHOST;
1578 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1579 h = calloc(1, sizeof(struct node_host));
1580 if (h == NULL)
1581 err(1, "address: calloc");
1582 h->ifname = NULL;
1583 h->af = AF_INET6;
1584 memcpy(&h->addr.v.a.addr,
1585 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1586 sizeof(h->addr.v.a.addr));
1587 h->ifindex =
1588 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1589 set_ipmask(h, mask);
1590 freeaddrinfo(res);
1591 h->next = NULL;
1592 h->tail = h;
1593 }
1594
1595 return (h);
1596 }
1597
1598 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1599 host_dns(const char *s, int v4mask, int v6mask)
1600 {
1601 struct addrinfo hints, *res0, *res;
1602 struct node_host *n, *h = NULL;
1603 int error, noalias = 0;
1604 int got4 = 0, got6 = 0;
1605 char *p, *ps;
1606
1607 if ((ps = strdup(s)) == NULL)
1608 err(1, "host_dns: strdup");
1609 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1610 noalias = 1;
1611 *p = '\0';
1612 }
1613 memset(&hints, 0, sizeof(hints));
1614 hints.ai_family = PF_UNSPEC;
1615 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1616 error = getaddrinfo(ps, NULL, &hints, &res0);
1617 if (error) {
1618 free(ps);
1619 return (h);
1620 }
1621
1622 for (res = res0; res; res = res->ai_next) {
1623 if (res->ai_family != AF_INET &&
1624 res->ai_family != AF_INET6)
1625 continue;
1626 if (noalias) {
1627 if (res->ai_family == AF_INET) {
1628 if (got4)
1629 continue;
1630 got4 = 1;
1631 } else {
1632 if (got6)
1633 continue;
1634 got6 = 1;
1635 }
1636 }
1637 n = calloc(1, sizeof(struct node_host));
1638 if (n == NULL)
1639 err(1, "host_dns: calloc");
1640 n->ifname = NULL;
1641 n->af = res->ai_family;
1642 if (res->ai_family == AF_INET) {
1643 memcpy(&n->addr.v.a.addr,
1644 &((struct sockaddr_in *)
1645 res->ai_addr)->sin_addr.s_addr,
1646 sizeof(struct in_addr));
1647 set_ipmask(n, v4mask);
1648 } else {
1649 memcpy(&n->addr.v.a.addr,
1650 &((struct sockaddr_in6 *)
1651 res->ai_addr)->sin6_addr.s6_addr,
1652 sizeof(struct in6_addr));
1653 n->ifindex =
1654 ((struct sockaddr_in6 *)
1655 res->ai_addr)->sin6_scope_id;
1656 set_ipmask(n, v6mask);
1657 }
1658 n->next = NULL;
1659 n->tail = n;
1660 if (h == NULL)
1661 h = n;
1662 else {
1663 h->tail->next = n;
1664 h->tail = n;
1665 }
1666 }
1667 freeaddrinfo(res0);
1668 free(ps);
1669
1670 return (h);
1671 }
1672
1673 /*
1674 * convert a hostname to a list of addresses and put them in the given buffer.
1675 * test:
1676 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1677 */
1678 int
append_addr(struct pfr_buffer * b,char * s,int test)1679 append_addr(struct pfr_buffer *b, char *s, int test)
1680 {
1681 char *r;
1682 struct node_host *h, *n;
1683 int rv, not = 0;
1684
1685 for (r = s; *r == '!'; r++)
1686 not = !not;
1687 if ((n = host(r)) == NULL) {
1688 errno = 0;
1689 return (-1);
1690 }
1691 rv = append_addr_host(b, n, test, not);
1692 do {
1693 h = n;
1694 n = n->next;
1695 free(h);
1696 } while (n != NULL);
1697 return (rv);
1698 }
1699
1700 /*
1701 * same as previous function, but with a pre-parsed input and the ability
1702 * to "negate" the result. Does not free the node_host list.
1703 * not:
1704 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1705 */
1706 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1707 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1708 {
1709 int bits;
1710 struct pfr_addr addr;
1711
1712 do {
1713 bzero(&addr, sizeof(addr));
1714 addr.pfra_not = n->not ^ not;
1715 addr.pfra_af = n->af;
1716 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1717 switch (n->af) {
1718 case AF_INET:
1719 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1720 bits = 32;
1721 break;
1722 case AF_INET6:
1723 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1724 sizeof(struct in6_addr));
1725 bits = 128;
1726 break;
1727 default:
1728 errno = EINVAL;
1729 return (-1);
1730 }
1731 if ((test && (not || addr.pfra_net != bits)) ||
1732 addr.pfra_net > bits) {
1733 errno = EINVAL;
1734 return (-1);
1735 }
1736 if (pfr_buf_add(b, &addr))
1737 return (-1);
1738 } while ((n = n->next) != NULL);
1739
1740 return (0);
1741 }
1742
1743 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)1744 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1745 {
1746 struct pfioc_trans_e trans;
1747
1748 bzero(&trans, sizeof(trans));
1749 trans.rs_num = rs_num;
1750 if (strlcpy(trans.anchor, anchor,
1751 sizeof(trans.anchor)) >= sizeof(trans.anchor))
1752 errx(1, "pfctl_add_trans: strlcpy");
1753
1754 return pfr_buf_add(buf, &trans);
1755 }
1756
1757 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)1758 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1759 {
1760 struct pfioc_trans_e *p;
1761
1762 PFRB_FOREACH(p, buf)
1763 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1764 return (p->ticket);
1765 errx(1, "pfctl_get_ticket: assertion failed");
1766 }
1767
1768 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1769 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1770 {
1771 struct pfioc_trans trans;
1772
1773 bzero(&trans, sizeof(trans));
1774 trans.size = buf->pfrb_size - from;
1775 trans.esize = sizeof(struct pfioc_trans_e);
1776 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1777 return ioctl(dev, cmd, &trans);
1778 }
1779