xref: /freebsd/sbin/pfctl/pfctl_parser.c (revision 4982db387fc85a13f1da39462fe1b83bec0c1248)
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