xref: /freebsd/sbin/pfctl/pfctl_parser.c (revision 3332f1b444d4a73238e9f59cca27bfc95fe936bd)
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 <assert.h>
54 #include <search.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <ctype.h>
59 #include <netdb.h>
60 #include <stdarg.h>
61 #include <errno.h>
62 #include <err.h>
63 #include <ifaddrs.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, unsigned, unsigned, const char *, unsigned);
72 void		 print_flags (u_int8_t);
73 void		 print_fromto(struct pf_rule_addr *, pf_osfp_t,
74 		    struct pf_rule_addr *, u_int8_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_v4(const char *, int);
79 struct node_host	*host_v6(const char *, int);
80 struct node_host	*host_dns(const char *, int, int);
81 
82 const char * const tcpflags = "FSRPAUEW";
83 
84 static const struct icmptypeent icmp_type[] = {
85 	{ "echoreq",	ICMP_ECHO },
86 	{ "echorep",	ICMP_ECHOREPLY },
87 	{ "unreach",	ICMP_UNREACH },
88 	{ "squench",	ICMP_SOURCEQUENCH },
89 	{ "redir",	ICMP_REDIRECT },
90 	{ "althost",	ICMP_ALTHOSTADDR },
91 	{ "routeradv",	ICMP_ROUTERADVERT },
92 	{ "routersol",	ICMP_ROUTERSOLICIT },
93 	{ "timex",	ICMP_TIMXCEED },
94 	{ "paramprob",	ICMP_PARAMPROB },
95 	{ "timereq",	ICMP_TSTAMP },
96 	{ "timerep",	ICMP_TSTAMPREPLY },
97 	{ "inforeq",	ICMP_IREQ },
98 	{ "inforep",	ICMP_IREQREPLY },
99 	{ "maskreq",	ICMP_MASKREQ },
100 	{ "maskrep",	ICMP_MASKREPLY },
101 	{ "trace",	ICMP_TRACEROUTE },
102 	{ "dataconv",	ICMP_DATACONVERR },
103 	{ "mobredir",	ICMP_MOBILE_REDIRECT },
104 	{ "ipv6-where",	ICMP_IPV6_WHEREAREYOU },
105 	{ "ipv6-here",	ICMP_IPV6_IAMHERE },
106 	{ "mobregreq",	ICMP_MOBILE_REGREQUEST },
107 	{ "mobregrep",	ICMP_MOBILE_REGREPLY },
108 	{ "skip",	ICMP_SKIP },
109 	{ "photuris",	ICMP_PHOTURIS }
110 };
111 
112 static const struct icmptypeent icmp6_type[] = {
113 	{ "unreach",	ICMP6_DST_UNREACH },
114 	{ "toobig",	ICMP6_PACKET_TOO_BIG },
115 	{ "timex",	ICMP6_TIME_EXCEEDED },
116 	{ "paramprob",	ICMP6_PARAM_PROB },
117 	{ "echoreq",	ICMP6_ECHO_REQUEST },
118 	{ "echorep",	ICMP6_ECHO_REPLY },
119 	{ "groupqry",	ICMP6_MEMBERSHIP_QUERY },
120 	{ "listqry",	MLD_LISTENER_QUERY },
121 	{ "grouprep",	ICMP6_MEMBERSHIP_REPORT },
122 	{ "listenrep",	MLD_LISTENER_REPORT },
123 	{ "groupterm",	ICMP6_MEMBERSHIP_REDUCTION },
124 	{ "listendone", MLD_LISTENER_DONE },
125 	{ "routersol",	ND_ROUTER_SOLICIT },
126 	{ "routeradv",	ND_ROUTER_ADVERT },
127 	{ "neighbrsol", ND_NEIGHBOR_SOLICIT },
128 	{ "neighbradv", ND_NEIGHBOR_ADVERT },
129 	{ "redir",	ND_REDIRECT },
130 	{ "routrrenum", ICMP6_ROUTER_RENUMBERING },
131 	{ "wrureq",	ICMP6_WRUREQUEST },
132 	{ "wrurep",	ICMP6_WRUREPLY },
133 	{ "fqdnreq",	ICMP6_FQDN_QUERY },
134 	{ "fqdnrep",	ICMP6_FQDN_REPLY },
135 	{ "niqry",	ICMP6_NI_QUERY },
136 	{ "nirep",	ICMP6_NI_REPLY },
137 	{ "mtraceresp",	MLD_MTRACE_RESP },
138 	{ "mtrace",	MLD_MTRACE }
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 	{ "udp.first",		PFTM_UDP_FIRST_PACKET },
198 	{ "udp.single",		PFTM_UDP_SINGLE },
199 	{ "udp.multiple",	PFTM_UDP_MULTIPLE },
200 	{ "icmp.first",		PFTM_ICMP_FIRST_PACKET },
201 	{ "icmp.error",		PFTM_ICMP_ERROR_REPLY },
202 	{ "other.first",	PFTM_OTHER_FIRST_PACKET },
203 	{ "other.single",	PFTM_OTHER_SINGLE },
204 	{ "other.multiple",	PFTM_OTHER_MULTIPLE },
205 	{ "frag",		PFTM_FRAG },
206 	{ "interval",		PFTM_INTERVAL },
207 	{ "adaptive.start",	PFTM_ADAPTIVE_START },
208 	{ "adaptive.end",	PFTM_ADAPTIVE_END },
209 	{ "src.track",		PFTM_SRC_NODE },
210 	{ NULL,			0 }
211 };
212 
213 static struct hsearch_data isgroup_map;
214 
215 static __attribute__((constructor)) void
216 pfctl_parser_init(void)
217 {
218 	/*
219 	 * As hdestroy() will never be called on these tables, it will be
220 	 * safe to use references into the stored data as keys.
221 	 */
222 	if (hcreate_r(0, &isgroup_map) == 0)
223 		err(1, "Failed to create interface group query response map");
224 }
225 
226 const struct icmptypeent *
227 geticmptypebynumber(u_int8_t type, sa_family_t af)
228 {
229 	unsigned int	i;
230 
231 	if (af != AF_INET6) {
232 		for (i=0; i < nitems(icmp_type); i++) {
233 			if (type == icmp_type[i].type)
234 				return (&icmp_type[i]);
235 		}
236 	} else {
237 		for (i=0; i < nitems(icmp6_type); i++) {
238 			if (type == icmp6_type[i].type)
239 				 return (&icmp6_type[i]);
240 		}
241 	}
242 	return (NULL);
243 }
244 
245 const struct icmptypeent *
246 geticmptypebyname(char *w, sa_family_t af)
247 {
248 	unsigned int	i;
249 
250 	if (af != AF_INET6) {
251 		for (i=0; i < nitems(icmp_type); i++) {
252 			if (!strcmp(w, icmp_type[i].name))
253 				return (&icmp_type[i]);
254 		}
255 	} else {
256 		for (i=0; i < nitems(icmp6_type); i++) {
257 			if (!strcmp(w, icmp6_type[i].name))
258 				return (&icmp6_type[i]);
259 		}
260 	}
261 	return (NULL);
262 }
263 
264 const struct icmpcodeent *
265 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
266 {
267 	unsigned int	i;
268 
269 	if (af != AF_INET6) {
270 		for (i=0; i < nitems(icmp_code); i++) {
271 			if (type == icmp_code[i].type &&
272 			    code == icmp_code[i].code)
273 				return (&icmp_code[i]);
274 		}
275 	} else {
276 		for (i=0; i < nitems(icmp6_code); i++) {
277 			if (type == icmp6_code[i].type &&
278 			    code == icmp6_code[i].code)
279 				return (&icmp6_code[i]);
280 		}
281 	}
282 	return (NULL);
283 }
284 
285 const struct icmpcodeent *
286 geticmpcodebyname(u_long type, char *w, sa_family_t af)
287 {
288 	unsigned int	i;
289 
290 	if (af != AF_INET6) {
291 		for (i=0; i < nitems(icmp_code); i++) {
292 			if (type == icmp_code[i].type &&
293 			    !strcmp(w, icmp_code[i].name))
294 				return (&icmp_code[i]);
295 		}
296 	} else {
297 		for (i=0; i < nitems(icmp6_code); i++) {
298 			if (type == icmp6_code[i].type &&
299 			    !strcmp(w, icmp6_code[i].name))
300 				return (&icmp6_code[i]);
301 		}
302 	}
303 	return (NULL);
304 }
305 
306 void
307 print_op(u_int8_t op, const char *a1, const char *a2)
308 {
309 	if (op == PF_OP_IRG)
310 		printf(" %s >< %s", a1, a2);
311 	else if (op == PF_OP_XRG)
312 		printf(" %s <> %s", a1, a2);
313 	else if (op == PF_OP_EQ)
314 		printf(" = %s", a1);
315 	else if (op == PF_OP_NE)
316 		printf(" != %s", a1);
317 	else if (op == PF_OP_LT)
318 		printf(" < %s", a1);
319 	else if (op == PF_OP_LE)
320 		printf(" <= %s", a1);
321 	else if (op == PF_OP_GT)
322 		printf(" > %s", a1);
323 	else if (op == PF_OP_GE)
324 		printf(" >= %s", a1);
325 	else if (op == PF_OP_RRG)
326 		printf(" %s:%s", a1, a2);
327 }
328 
329 void
330 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
331 {
332 	char		 a1[6], a2[6];
333 	struct servent	*s;
334 
335 	if (!numeric)
336 		s = getservbyport(p1, proto);
337 	else
338 		s = NULL;
339 	p1 = ntohs(p1);
340 	p2 = ntohs(p2);
341 	snprintf(a1, sizeof(a1), "%u", p1);
342 	snprintf(a2, sizeof(a2), "%u", p2);
343 	printf(" port");
344 	if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
345 		print_op(op, s->s_name, a2);
346 	else
347 		print_op(op, a1, a2);
348 }
349 
350 void
351 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
352 {
353 	char	a1[11], a2[11];
354 
355 	snprintf(a1, sizeof(a1), "%u", u1);
356 	snprintf(a2, sizeof(a2), "%u", u2);
357 	printf(" %s", t);
358 	if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
359 		print_op(op, "unknown", a2);
360 	else
361 		print_op(op, a1, a2);
362 }
363 
364 void
365 print_flags(u_int8_t f)
366 {
367 	int	i;
368 
369 	for (i = 0; tcpflags[i]; ++i)
370 		if (f & (1 << i))
371 			printf("%c", tcpflags[i]);
372 }
373 
374 void
375 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
376     sa_family_t af, u_int8_t proto, int verbose, int numeric)
377 {
378 	char buf[PF_OSFP_LEN*3];
379 	if (src->addr.type == PF_ADDR_ADDRMASK &&
380 	    dst->addr.type == PF_ADDR_ADDRMASK &&
381 	    PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
382 	    PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
383 	    PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
384 	    PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
385 	    !src->neg && !dst->neg &&
386 	    !src->port_op && !dst->port_op &&
387 	    osfp == PF_OSFP_ANY)
388 		printf(" all");
389 	else {
390 		printf(" from ");
391 		if (src->neg)
392 			printf("! ");
393 		print_addr(&src->addr, af, verbose);
394 		if (src->port_op)
395 			print_port(src->port_op, src->port[0],
396 			    src->port[1],
397 			    proto == IPPROTO_TCP ? "tcp" : "udp",
398 			    numeric);
399 		if (osfp != PF_OSFP_ANY)
400 			printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
401 			    sizeof(buf)));
402 
403 		printf(" to ");
404 		if (dst->neg)
405 			printf("! ");
406 		print_addr(&dst->addr, af, verbose);
407 		if (dst->port_op)
408 			print_port(dst->port_op, dst->port[0],
409 			    dst->port[1],
410 			    proto == IPPROTO_TCP ? "tcp" : "udp",
411 			    numeric);
412 	}
413 }
414 
415 void
416 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2,
417     sa_family_t af, int id)
418 {
419 	struct pf_pooladdr	*pooladdr;
420 
421 	if ((TAILQ_FIRST(&pool->list) != NULL) &&
422 	    TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
423 		printf("{ ");
424 	TAILQ_FOREACH(pooladdr, &pool->list, entries){
425 		switch (id) {
426 		case PF_NAT:
427 		case PF_RDR:
428 		case PF_BINAT:
429 			print_addr(&pooladdr->addr, af, 0);
430 			break;
431 		case PF_PASS:
432 			if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
433 				printf("%s", pooladdr->ifname);
434 			else {
435 				printf("(%s ", pooladdr->ifname);
436 				print_addr(&pooladdr->addr, af, 0);
437 				printf(")");
438 			}
439 			break;
440 		default:
441 			break;
442 		}
443 		if (TAILQ_NEXT(pooladdr, entries) != NULL)
444 			printf(", ");
445 		else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
446 			printf(" }");
447 	}
448 	switch (id) {
449 	case PF_NAT:
450 		if ((p1 != PF_NAT_PROXY_PORT_LOW ||
451 		    p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
452 			if (p1 == p2)
453 				printf(" port %u", p1);
454 			else
455 				printf(" port %u:%u", p1, p2);
456 		}
457 		break;
458 	case PF_RDR:
459 		if (p1) {
460 			printf(" port %u", p1);
461 			if (p2 && (p2 != p1))
462 				printf(":%u", p2);
463 		}
464 		break;
465 	default:
466 		break;
467 	}
468 	switch (pool->opts & PF_POOL_TYPEMASK) {
469 	case PF_POOL_NONE:
470 		break;
471 	case PF_POOL_BITMASK:
472 		printf(" bitmask");
473 		break;
474 	case PF_POOL_RANDOM:
475 		printf(" random");
476 		break;
477 	case PF_POOL_SRCHASH:
478 		printf(" source-hash 0x%08x%08x%08x%08x",
479 		    pool->key.key32[0], pool->key.key32[1],
480 		    pool->key.key32[2], pool->key.key32[3]);
481 		break;
482 	case PF_POOL_ROUNDROBIN:
483 		printf(" round-robin");
484 		break;
485 	}
486 	if (pool->opts & PF_POOL_STICKYADDR)
487 		printf(" sticky-address");
488 	if (id == PF_NAT && p1 == 0 && p2 == 0)
489 		printf(" static-port");
490 	if (pool->mape.offset > 0)
491 		printf(" map-e-portset %u/%u/%u",
492 		    pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
493 }
494 
495 const char	* const pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
496 const char	* const pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
497 const char	* const pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
498 const char	* const pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
499 
500 void
501 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts)
502 {
503 	struct pfctl_status_counter	*c;
504 	char			statline[80], *running;
505 	time_t			runtime;
506 	int			i;
507 	char			buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
508 	static const char	hex[] = "0123456789abcdef";
509 
510 	runtime = time(NULL) - s->since;
511 	running = s->running ? "Enabled" : "Disabled";
512 
513 	if (s->since) {
514 		unsigned int	sec, min, hrs, day = runtime;
515 
516 		sec = day % 60;
517 		day /= 60;
518 		min = day % 60;
519 		day /= 60;
520 		hrs = day % 24;
521 		day /= 24;
522 		snprintf(statline, sizeof(statline),
523 		    "Status: %s for %u days %.2u:%.2u:%.2u",
524 		    running, day, hrs, min, sec);
525 	} else
526 		snprintf(statline, sizeof(statline), "Status: %s", running);
527 	printf("%-44s", statline);
528 	switch (s->debug) {
529 	case PF_DEBUG_NONE:
530 		printf("%15s\n\n", "Debug: None");
531 		break;
532 	case PF_DEBUG_URGENT:
533 		printf("%15s\n\n", "Debug: Urgent");
534 		break;
535 	case PF_DEBUG_MISC:
536 		printf("%15s\n\n", "Debug: Misc");
537 		break;
538 	case PF_DEBUG_NOISY:
539 		printf("%15s\n\n", "Debug: Loud");
540 		break;
541 	}
542 
543 	if (opts & PF_OPT_VERBOSE) {
544 		printf("Hostid:   0x%08x\n", ntohl(s->hostid));
545 
546 		for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
547 			buf[i + i] = hex[s->pf_chksum[i] >> 4];
548 			buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
549 		}
550 		buf[i + i] = '\0';
551 		printf("Checksum: 0x%s\n\n", buf);
552 	}
553 
554 	if (s->ifname[0] != 0) {
555 		printf("Interface Stats for %-16s %5s %16s\n",
556 		    s->ifname, "IPv4", "IPv6");
557 		printf("  %-25s %14llu %16llu\n", "Bytes In",
558 		    (unsigned long long)s->bcounters[0][0],
559 		    (unsigned long long)s->bcounters[1][0]);
560 		printf("  %-25s %14llu %16llu\n", "Bytes Out",
561 		    (unsigned long long)s->bcounters[0][1],
562 		    (unsigned long long)s->bcounters[1][1]);
563 		printf("  Packets In\n");
564 		printf("    %-23s %14llu %16llu\n", "Passed",
565 		    (unsigned long long)s->pcounters[0][0][PF_PASS],
566 		    (unsigned long long)s->pcounters[1][0][PF_PASS]);
567 		printf("    %-23s %14llu %16llu\n", "Blocked",
568 		    (unsigned long long)s->pcounters[0][0][PF_DROP],
569 		    (unsigned long long)s->pcounters[1][0][PF_DROP]);
570 		printf("  Packets Out\n");
571 		printf("    %-23s %14llu %16llu\n", "Passed",
572 		    (unsigned long long)s->pcounters[0][1][PF_PASS],
573 		    (unsigned long long)s->pcounters[1][1][PF_PASS]);
574 		printf("    %-23s %14llu %16llu\n\n", "Blocked",
575 		    (unsigned long long)s->pcounters[0][1][PF_DROP],
576 		    (unsigned long long)s->pcounters[1][1][PF_DROP]);
577 	}
578 	printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
579 	printf("  %-25s %14ju %14s\n", "current entries", s->states, "");
580 	TAILQ_FOREACH(c, &s->fcounters, entry) {
581 		printf("  %-25s %14ju ", c->name, c->counter);
582 		if (runtime > 0)
583 			printf("%14.1f/s\n",
584 			    (double)c->counter / (double)runtime);
585 		else
586 			printf("%14s\n", "");
587 	}
588 	if (opts & PF_OPT_VERBOSE) {
589 		printf("Source Tracking Table\n");
590 		printf("  %-25s %14ju %14s\n", "current entries",
591 		    s->src_nodes, "");
592 		TAILQ_FOREACH(c, &s->scounters, entry) {
593 			printf("  %-25s %14ju ", c->name, c->counter);
594 			if (runtime > 0)
595 				printf("%14.1f/s\n",
596 				    (double)c->counter / (double)runtime);
597 			else
598 				printf("%14s\n", "");
599 		}
600 	}
601 	printf("Counters\n");
602 	TAILQ_FOREACH(c, &s->counters, entry) {
603 		printf("  %-25s %14ju ", c->name, c->counter);
604 		if (runtime > 0)
605 			printf("%14.1f/s\n",
606 			    (double)c->counter / (double)runtime);
607 		else
608 			printf("%14s\n", "");
609 	}
610 	if (opts & PF_OPT_VERBOSE) {
611 		printf("Limit Counters\n");
612 		TAILQ_FOREACH(c, &s->lcounters, entry) {
613 			printf("  %-25s %14ju ", c->name, c->counter);
614 			if (runtime > 0)
615 				printf("%14.1f/s\n",
616 				    (double)c->counter / (double)runtime);
617 			else
618 				printf("%14s\n", "");
619 		}
620 
621 		printf("Syncookies\n");
622 		assert(cookies->mode <= PFCTL_SYNCOOKIES_ADAPTIVE);
623 		printf("  %-25s %s\n", "mode",
624 		    PFCTL_SYNCOOKIES_MODE_NAMES[cookies->mode]);
625 	}
626 }
627 
628 void
629 print_running(struct pfctl_status *status)
630 {
631 	printf("%s\n", status->running ? "Enabled" : "Disabled");
632 }
633 
634 void
635 print_src_node(struct pf_src_node *sn, int opts)
636 {
637 	struct pf_addr_wrap aw;
638 	int min, sec;
639 
640 	memset(&aw, 0, sizeof(aw));
641 	if (sn->af == AF_INET)
642 		aw.v.a.mask.addr32[0] = 0xffffffff;
643 	else
644 		memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
645 
646 	aw.v.a.addr = sn->addr;
647 	print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
648 	printf(" -> ");
649 	aw.v.a.addr = sn->raddr;
650 	print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
651 	printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
652 	    sn->conn, sn->conn_rate.count / 1000,
653 	    (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
654 	if (opts & PF_OPT_VERBOSE) {
655 		sec = sn->creation % 60;
656 		sn->creation /= 60;
657 		min = sn->creation % 60;
658 		sn->creation /= 60;
659 		printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
660 		if (sn->states == 0) {
661 			sec = sn->expire % 60;
662 			sn->expire /= 60;
663 			min = sn->expire % 60;
664 			sn->expire /= 60;
665 			printf(", expires in %.2u:%.2u:%.2u",
666 			    sn->expire, min, sec);
667 		}
668 		printf(", %llu pkts, %llu bytes",
669 #ifdef __FreeBSD__
670 		    (unsigned long long)(sn->packets[0] + sn->packets[1]),
671 		    (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
672 #else
673 		    sn->packets[0] + sn->packets[1],
674 		    sn->bytes[0] + sn->bytes[1]);
675 #endif
676 		switch (sn->ruletype) {
677 		case PF_NAT:
678 			if (sn->rule.nr != -1)
679 				printf(", nat rule %u", sn->rule.nr);
680 			break;
681 		case PF_RDR:
682 			if (sn->rule.nr != -1)
683 				printf(", rdr rule %u", sn->rule.nr);
684 			break;
685 		case PF_PASS:
686 			if (sn->rule.nr != -1)
687 				printf(", filter rule %u", sn->rule.nr);
688 			break;
689 		}
690 		printf("\n");
691 	}
692 }
693 
694 void
695 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
696 {
697 	static const char *actiontypes[] = { "pass", "block", "scrub",
698 	    "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
699 	static const char *anchortypes[] = { "anchor", "anchor", "anchor",
700 	    "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
701 	    "binat-anchor", "rdr-anchor", "rdr-anchor" };
702 	int	i, opts;
703 
704 	if (verbose)
705 		printf("@%d ", r->nr);
706 	if (r->action == PF_MATCH)
707 		printf("match");
708 	else if (r->action > PF_NORDR)
709 		printf("action(%d)", r->action);
710 	else if (anchor_call[0]) {
711 		if (anchor_call[0] == '_') {
712 			printf("%s", anchortypes[r->action]);
713 		} else
714 			printf("%s \"%s\"", anchortypes[r->action],
715 			    anchor_call);
716 	} else {
717 		printf("%s", actiontypes[r->action]);
718 		if (r->natpass)
719 			printf(" pass");
720 	}
721 	if (r->action == PF_DROP) {
722 		if (r->rule_flag & PFRULE_RETURN)
723 			printf(" return");
724 		else if (r->rule_flag & PFRULE_RETURNRST) {
725 			if (!r->return_ttl)
726 				printf(" return-rst");
727 			else
728 				printf(" return-rst(ttl %d)", r->return_ttl);
729 		} else if (r->rule_flag & PFRULE_RETURNICMP) {
730 			const struct icmpcodeent	*ic, *ic6;
731 
732 			ic = geticmpcodebynumber(r->return_icmp >> 8,
733 			    r->return_icmp & 255, AF_INET);
734 			ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
735 			    r->return_icmp6 & 255, AF_INET6);
736 
737 			switch (r->af) {
738 			case AF_INET:
739 				printf(" return-icmp");
740 				if (ic == NULL)
741 					printf("(%u)", r->return_icmp & 255);
742 				else
743 					printf("(%s)", ic->name);
744 				break;
745 			case AF_INET6:
746 				printf(" return-icmp6");
747 				if (ic6 == NULL)
748 					printf("(%u)", r->return_icmp6 & 255);
749 				else
750 					printf("(%s)", ic6->name);
751 				break;
752 			default:
753 				printf(" return-icmp");
754 				if (ic == NULL)
755 					printf("(%u, ", r->return_icmp & 255);
756 				else
757 					printf("(%s, ", ic->name);
758 				if (ic6 == NULL)
759 					printf("%u)", r->return_icmp6 & 255);
760 				else
761 					printf("%s)", ic6->name);
762 				break;
763 			}
764 		} else
765 			printf(" drop");
766 	}
767 	if (r->direction == PF_IN)
768 		printf(" in");
769 	else if (r->direction == PF_OUT)
770 		printf(" out");
771 	if (r->log) {
772 		printf(" log");
773 		if (r->log & ~PF_LOG || r->logif) {
774 			int count = 0;
775 
776 			printf(" (");
777 			if (r->log & PF_LOG_ALL)
778 				printf("%sall", count++ ? ", " : "");
779 			if (r->log & PF_LOG_SOCKET_LOOKUP)
780 				printf("%suser", count++ ? ", " : "");
781 			if (r->logif)
782 				printf("%sto pflog%u", count++ ? ", " : "",
783 				    r->logif);
784 			printf(")");
785 		}
786 	}
787 	if (r->quick)
788 		printf(" quick");
789 	if (r->ifname[0]) {
790 		if (r->ifnot)
791 			printf(" on ! %s", r->ifname);
792 		else
793 			printf(" on %s", r->ifname);
794 	}
795 	if (r->rt) {
796 		if (r->rt == PF_ROUTETO)
797 			printf(" route-to");
798 		else if (r->rt == PF_REPLYTO)
799 			printf(" reply-to");
800 		else if (r->rt == PF_DUPTO)
801 			printf(" dup-to");
802 		printf(" ");
803 		print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
804 	}
805 	if (r->af) {
806 		if (r->af == AF_INET)
807 			printf(" inet");
808 		else
809 			printf(" inet6");
810 	}
811 	if (r->proto) {
812 		const char *protoname;
813 
814 		if ((protoname = pfctl_proto2name(r->proto)) != NULL)
815 			printf(" proto %s", protoname);
816 		else
817 			printf(" proto %u", r->proto);
818 	}
819 	print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
820 	    verbose, numeric);
821 	if (r->uid.op)
822 		print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
823 		    UID_MAX);
824 	if (r->gid.op)
825 		print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
826 		    GID_MAX);
827 	if (r->flags || r->flagset) {
828 		printf(" flags ");
829 		print_flags(r->flags);
830 		printf("/");
831 		print_flags(r->flagset);
832 	} else if (r->action == PF_PASS &&
833 	    (!r->proto || r->proto == IPPROTO_TCP) &&
834 	    !(r->rule_flag & PFRULE_FRAGMENT) &&
835 	    !anchor_call[0] && r->keep_state)
836 		printf(" flags any");
837 	if (r->type) {
838 		const struct icmptypeent	*it;
839 
840 		it = geticmptypebynumber(r->type-1, r->af);
841 		if (r->af != AF_INET6)
842 			printf(" icmp-type");
843 		else
844 			printf(" icmp6-type");
845 		if (it != NULL)
846 			printf(" %s", it->name);
847 		else
848 			printf(" %u", r->type-1);
849 		if (r->code) {
850 			const struct icmpcodeent	*ic;
851 
852 			ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
853 			if (ic != NULL)
854 				printf(" code %s", ic->name);
855 			else
856 				printf(" code %u", r->code-1);
857 		}
858 	}
859 	if (r->tos)
860 		printf(" tos 0x%2.2x", r->tos);
861 	if (r->prio)
862 		printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
863 	if (r->scrub_flags & PFSTATE_SETMASK) {
864 		char *comma = "";
865 		printf(" set (");
866 		if (r->scrub_flags & PFSTATE_SETPRIO) {
867 			if (r->set_prio[0] == r->set_prio[1])
868 				printf("%s prio %u", comma, r->set_prio[0]);
869 			else
870 				printf("%s prio(%u, %u)", comma, r->set_prio[0],
871 				    r->set_prio[1]);
872 			comma = ",";
873 		}
874 		printf(" )");
875 	}
876 	if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
877 		printf(" no state");
878 	else if (r->keep_state == PF_STATE_NORMAL)
879 		printf(" keep state");
880 	else if (r->keep_state == PF_STATE_MODULATE)
881 		printf(" modulate state");
882 	else if (r->keep_state == PF_STATE_SYNPROXY)
883 		printf(" synproxy state");
884 	if (r->prob) {
885 		char	buf[20];
886 
887 		snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
888 		for (i = strlen(buf)-1; i > 0; i--) {
889 			if (buf[i] == '0')
890 				buf[i] = '\0';
891 			else {
892 				if (buf[i] == '.')
893 					buf[i] = '\0';
894 				break;
895 			}
896 		}
897 		printf(" probability %s%%", buf);
898 	}
899 	opts = 0;
900 	if (r->max_states || r->max_src_nodes || r->max_src_states)
901 		opts = 1;
902 	if (r->rule_flag & PFRULE_NOSYNC)
903 		opts = 1;
904 	if (r->rule_flag & PFRULE_SRCTRACK)
905 		opts = 1;
906 	if (r->rule_flag & PFRULE_IFBOUND)
907 		opts = 1;
908 	if (r->rule_flag & PFRULE_STATESLOPPY)
909 		opts = 1;
910 	for (i = 0; !opts && i < PFTM_MAX; ++i)
911 		if (r->timeout[i])
912 			opts = 1;
913 	if (opts) {
914 		printf(" (");
915 		if (r->max_states) {
916 			printf("max %u", r->max_states);
917 			opts = 0;
918 		}
919 		if (r->rule_flag & PFRULE_NOSYNC) {
920 			if (!opts)
921 				printf(", ");
922 			printf("no-sync");
923 			opts = 0;
924 		}
925 		if (r->rule_flag & PFRULE_SRCTRACK) {
926 			if (!opts)
927 				printf(", ");
928 			printf("source-track");
929 			if (r->rule_flag & PFRULE_RULESRCTRACK)
930 				printf(" rule");
931 			else
932 				printf(" global");
933 			opts = 0;
934 		}
935 		if (r->max_src_states) {
936 			if (!opts)
937 				printf(", ");
938 			printf("max-src-states %u", r->max_src_states);
939 			opts = 0;
940 		}
941 		if (r->max_src_conn) {
942 			if (!opts)
943 				printf(", ");
944 			printf("max-src-conn %u", r->max_src_conn);
945 			opts = 0;
946 		}
947 		if (r->max_src_conn_rate.limit) {
948 			if (!opts)
949 				printf(", ");
950 			printf("max-src-conn-rate %u/%u",
951 			    r->max_src_conn_rate.limit,
952 			    r->max_src_conn_rate.seconds);
953 			opts = 0;
954 		}
955 		if (r->max_src_nodes) {
956 			if (!opts)
957 				printf(", ");
958 			printf("max-src-nodes %u", r->max_src_nodes);
959 			opts = 0;
960 		}
961 		if (r->overload_tblname[0]) {
962 			if (!opts)
963 				printf(", ");
964 			printf("overload <%s>", r->overload_tblname);
965 			if (r->flush)
966 				printf(" flush");
967 			if (r->flush & PF_FLUSH_GLOBAL)
968 				printf(" global");
969 		}
970 		if (r->rule_flag & PFRULE_IFBOUND) {
971 			if (!opts)
972 				printf(", ");
973 			printf("if-bound");
974 			opts = 0;
975 		}
976 		if (r->rule_flag & PFRULE_STATESLOPPY) {
977 			if (!opts)
978 				printf(", ");
979 			printf("sloppy");
980 			opts = 0;
981 		}
982 		for (i = 0; i < PFTM_MAX; ++i)
983 			if (r->timeout[i]) {
984 				int j;
985 
986 				if (!opts)
987 					printf(", ");
988 				opts = 0;
989 				for (j = 0; pf_timeouts[j].name != NULL;
990 				    ++j)
991 					if (pf_timeouts[j].timeout == i)
992 						break;
993 				printf("%s %u", pf_timeouts[j].name == NULL ?
994 				    "inv.timeout" : pf_timeouts[j].name,
995 				    r->timeout[i]);
996 			}
997 		printf(")");
998 	}
999 	if (r->rule_flag & PFRULE_FRAGMENT)
1000 		printf(" fragment");
1001 	if (r->rule_flag & PFRULE_NODF)
1002 		printf(" no-df");
1003 	if (r->rule_flag & PFRULE_RANDOMID)
1004 		printf(" random-id");
1005 	if (r->min_ttl)
1006 		printf(" min-ttl %d", r->min_ttl);
1007 	if (r->max_mss)
1008 		printf(" max-mss %d", r->max_mss);
1009 	if (r->rule_flag & PFRULE_SET_TOS)
1010 		printf(" set-tos 0x%2.2x", r->set_tos);
1011 	if (r->allow_opts)
1012 		printf(" allow-opts");
1013 	if (r->action == PF_SCRUB) {
1014 		if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1015 			printf(" reassemble tcp");
1016 
1017 		printf(" fragment reassemble");
1018 	}
1019 	i = 0;
1020 	while (r->label[i][0])
1021 		printf(" label \"%s\"", r->label[i++]);
1022 	if (r->ridentifier)
1023 		printf(" ridentifier %u", r->ridentifier);
1024 	/* Only dnrpipe as we might do (0, 42) to only queue return traffic. */
1025 	if (r->dnrpipe)
1026 		printf(" %s(%d, %d)",
1027 		    r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1028 		    r->dnpipe, r->dnrpipe);
1029 	else if (r->dnpipe)
1030 		printf(" %s %d",
1031 		    r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1032 		    r->dnpipe);
1033 	if (r->qname[0] && r->pqname[0])
1034 		printf(" queue(%s, %s)", r->qname, r->pqname);
1035 	else if (r->qname[0])
1036 		printf(" queue %s", r->qname);
1037 	if (r->tagname[0])
1038 		printf(" tag %s", r->tagname);
1039 	if (r->match_tagname[0]) {
1040 		if (r->match_tag_not)
1041 			printf(" !");
1042 		printf(" tagged %s", r->match_tagname);
1043 	}
1044 	if (r->rtableid != -1)
1045 		printf(" rtable %u", r->rtableid);
1046 	if (r->divert.port) {
1047 #ifdef __FreeBSD__
1048 		printf(" divert-to %u", ntohs(r->divert.port));
1049 #else
1050 		if (PF_AZERO(&r->divert.addr, r->af)) {
1051 			printf(" divert-reply");
1052 		} else {
1053 			/* XXX cut&paste from print_addr */
1054 			char buf[48];
1055 
1056 			printf(" divert-to ");
1057 			if (inet_ntop(r->af, &r->divert.addr, buf,
1058 			    sizeof(buf)) == NULL)
1059 				printf("?");
1060 			else
1061 				printf("%s", buf);
1062 			printf(" port %u", ntohs(r->divert.port));
1063 		}
1064 #endif
1065 	}
1066 	if (!anchor_call[0] && (r->action == PF_NAT ||
1067 	    r->action == PF_BINAT || r->action == PF_RDR)) {
1068 		printf(" -> ");
1069 		print_pool(&r->rpool, r->rpool.proxy_port[0],
1070 		    r->rpool.proxy_port[1], r->af, r->action);
1071 	}
1072 }
1073 
1074 void
1075 print_tabledef(const char *name, int flags, int addrs,
1076     struct node_tinithead *nodes)
1077 {
1078 	struct node_tinit	*ti, *nti;
1079 	struct node_host	*h;
1080 
1081 	printf("table <%s>", name);
1082 	if (flags & PFR_TFLAG_CONST)
1083 		printf(" const");
1084 	if (flags & PFR_TFLAG_PERSIST)
1085 		printf(" persist");
1086 	if (flags & PFR_TFLAG_COUNTERS)
1087 		printf(" counters");
1088 	SIMPLEQ_FOREACH(ti, nodes, entries) {
1089 		if (ti->file) {
1090 			printf(" file \"%s\"", ti->file);
1091 			continue;
1092 		}
1093 		printf(" {");
1094 		for (;;) {
1095 			for (h = ti->host; h != NULL; h = h->next) {
1096 				printf(h->not ? " !" : " ");
1097 				print_addr(&h->addr, h->af, 0);
1098 			}
1099 			nti = SIMPLEQ_NEXT(ti, entries);
1100 			if (nti != NULL && nti->file == NULL)
1101 				ti = nti;	/* merge lists */
1102 			else
1103 				break;
1104 		}
1105 		printf(" }");
1106 	}
1107 	if (addrs && SIMPLEQ_EMPTY(nodes))
1108 		printf(" { }");
1109 	printf("\n");
1110 }
1111 
1112 int
1113 parse_flags(char *s)
1114 {
1115 	char		*p, *q;
1116 	u_int8_t	 f = 0;
1117 
1118 	for (p = s; *p; p++) {
1119 		if ((q = strchr(tcpflags, *p)) == NULL)
1120 			return -1;
1121 		else
1122 			f |= 1 << (q - tcpflags);
1123 	}
1124 	return (f ? f : PF_TH_ALL);
1125 }
1126 
1127 void
1128 set_ipmask(struct node_host *h, u_int8_t b)
1129 {
1130 	struct pf_addr	*m, *n;
1131 	int		 i, j = 0;
1132 
1133 	m = &h->addr.v.a.mask;
1134 	memset(m, 0, sizeof(*m));
1135 
1136 	while (b >= 32) {
1137 		m->addr32[j++] = 0xffffffff;
1138 		b -= 32;
1139 	}
1140 	for (i = 31; i > 31-b; --i)
1141 		m->addr32[j] |= (1 << i);
1142 	if (b)
1143 		m->addr32[j] = htonl(m->addr32[j]);
1144 
1145 	/* Mask off bits of the address that will never be used. */
1146 	n = &h->addr.v.a.addr;
1147 	if (h->addr.type == PF_ADDR_ADDRMASK)
1148 		for (i = 0; i < 4; i++)
1149 			n->addr32[i] = n->addr32[i] & m->addr32[i];
1150 }
1151 
1152 int
1153 check_netmask(struct node_host *h, sa_family_t af)
1154 {
1155 	struct node_host	*n = NULL;
1156 	struct pf_addr	*m;
1157 
1158 	for (n = h; n != NULL; n = n->next) {
1159 		if (h->addr.type == PF_ADDR_TABLE)
1160 			continue;
1161 		m = &h->addr.v.a.mask;
1162 		/* fix up netmask for dynaddr */
1163 		if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1164 		    unmask(m, AF_INET6) > 32)
1165 			set_ipmask(n, 32);
1166 		/* netmasks > 32 bit are invalid on v4 */
1167 		if (af == AF_INET &&
1168 		    (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1169 			fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1170 			    unmask(m, AF_INET6));
1171 			return (1);
1172 		}
1173 	}
1174 	return (0);
1175 }
1176 
1177 /* interface lookup routines */
1178 
1179 static struct node_host	*iftab;
1180 
1181 /*
1182  * Retrieve the list of groups this interface is a member of and make sure
1183  * each group is in the group map.
1184  */
1185 static void
1186 ifa_add_groups_to_map(char *ifa_name)
1187 {
1188 	int			 s, len;
1189 	struct ifgroupreq	 ifgr;
1190 	struct ifg_req		*ifg;
1191 
1192 	s = get_query_socket();
1193 
1194 	/* Get size of group list for this interface */
1195 	memset(&ifgr, 0, sizeof(ifgr));
1196 	strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1197 	if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1198 		err(1, "SIOCGIFGROUP");
1199 
1200 	/* Retrieve group list for this interface */
1201 	len = ifgr.ifgr_len;
1202 	ifgr.ifgr_groups =
1203 	    (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1204 		sizeof(struct ifg_req));
1205 	if (ifgr.ifgr_groups == NULL)
1206 		err(1, "calloc");
1207 	if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1208 		err(1, "SIOCGIFGROUP");
1209 
1210 	ifg = ifgr.ifgr_groups;
1211 	for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1212 		len -= sizeof(struct ifg_req);
1213 		if (strcmp(ifg->ifgrq_group, "all")) {
1214 			ENTRY	 		 item;
1215 			ENTRY			*ret_item;
1216 			int			*answer;
1217 
1218 			item.key = ifg->ifgrq_group;
1219 			if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1220 				struct ifgroupreq	 ifgr2;
1221 
1222 				/* Don't know the answer yet */
1223 				if ((answer = malloc(sizeof(int))) == NULL)
1224 					err(1, "malloc");
1225 
1226 				bzero(&ifgr2, sizeof(ifgr2));
1227 				strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1228 				    sizeof(ifgr2.ifgr_name));
1229 				if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1230 					*answer = ifgr2.ifgr_len;
1231 				else
1232 					*answer = 0;
1233 
1234 				item.key = strdup(ifg->ifgrq_group);
1235 				item.data = answer;
1236 				if (hsearch_r(item, ENTER, &ret_item,
1237 					&isgroup_map) == 0)
1238 					err(1, "interface group query response"
1239 					    " map insert");
1240 			}
1241 		}
1242 	}
1243 	free(ifgr.ifgr_groups);
1244 }
1245 
1246 void
1247 ifa_load(void)
1248 {
1249 	struct ifaddrs		*ifap, *ifa;
1250 	struct node_host	*n = NULL, *h = NULL;
1251 
1252 	if (getifaddrs(&ifap) < 0)
1253 		err(1, "getifaddrs");
1254 
1255 	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1256 		if (!(ifa->ifa_addr->sa_family == AF_INET ||
1257 		    ifa->ifa_addr->sa_family == AF_INET6 ||
1258 		    ifa->ifa_addr->sa_family == AF_LINK))
1259 				continue;
1260 		n = calloc(1, sizeof(struct node_host));
1261 		if (n == NULL)
1262 			err(1, "address: calloc");
1263 		n->af = ifa->ifa_addr->sa_family;
1264 		n->ifa_flags = ifa->ifa_flags;
1265 #ifdef __KAME__
1266 		if (n->af == AF_INET6 &&
1267 		    IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1268 		    ifa->ifa_addr)->sin6_addr) &&
1269 		    ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1270 		    0) {
1271 			struct sockaddr_in6	*sin6;
1272 
1273 			sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1274 			sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1275 			    sin6->sin6_addr.s6_addr[3];
1276 			sin6->sin6_addr.s6_addr[2] = 0;
1277 			sin6->sin6_addr.s6_addr[3] = 0;
1278 		}
1279 #endif
1280 		n->ifindex = 0;
1281 		if (n->af == AF_INET) {
1282 			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1283 			    ifa->ifa_addr)->sin_addr.s_addr,
1284 			    sizeof(struct in_addr));
1285 			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1286 			    ifa->ifa_netmask)->sin_addr.s_addr,
1287 			    sizeof(struct in_addr));
1288 			if (ifa->ifa_broadaddr != NULL)
1289 				memcpy(&n->bcast, &((struct sockaddr_in *)
1290 				    ifa->ifa_broadaddr)->sin_addr.s_addr,
1291 				    sizeof(struct in_addr));
1292 			if (ifa->ifa_dstaddr != NULL)
1293 				memcpy(&n->peer, &((struct sockaddr_in *)
1294 				    ifa->ifa_dstaddr)->sin_addr.s_addr,
1295 				    sizeof(struct in_addr));
1296 		} else if (n->af == AF_INET6) {
1297 			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1298 			    ifa->ifa_addr)->sin6_addr.s6_addr,
1299 			    sizeof(struct in6_addr));
1300 			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1301 			    ifa->ifa_netmask)->sin6_addr.s6_addr,
1302 			    sizeof(struct in6_addr));
1303 			if (ifa->ifa_broadaddr != NULL)
1304 				memcpy(&n->bcast, &((struct sockaddr_in6 *)
1305 				    ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1306 				    sizeof(struct in6_addr));
1307 			if (ifa->ifa_dstaddr != NULL)
1308 				 memcpy(&n->peer, &((struct sockaddr_in6 *)
1309 				    ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1310 				    sizeof(struct in6_addr));
1311 			n->ifindex = ((struct sockaddr_in6 *)
1312 			    ifa->ifa_addr)->sin6_scope_id;
1313 		} else if (n->af == AF_LINK) {
1314 			ifa_add_groups_to_map(ifa->ifa_name);
1315 		}
1316 		if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1317 			err(1, "ifa_load: strdup");
1318 		n->next = NULL;
1319 		n->tail = n;
1320 		if (h == NULL)
1321 			h = n;
1322 		else {
1323 			h->tail->next = n;
1324 			h->tail = n;
1325 		}
1326 	}
1327 
1328 	iftab = h;
1329 	freeifaddrs(ifap);
1330 }
1331 
1332 static int
1333 get_socket_domain(void)
1334 {
1335 	int sdom;
1336 
1337 	sdom = AF_UNSPEC;
1338 #ifdef WITH_INET6
1339 	if (sdom == AF_UNSPEC && feature_present("inet6"))
1340 		sdom = AF_INET6;
1341 #endif
1342 #ifdef WITH_INET
1343 	if (sdom == AF_UNSPEC && feature_present("inet"))
1344 		sdom = AF_INET;
1345 #endif
1346 	if (sdom == AF_UNSPEC)
1347 		sdom = AF_LINK;
1348 
1349 	return (sdom);
1350 }
1351 
1352 int
1353 get_query_socket(void)
1354 {
1355 	static int s = -1;
1356 
1357 	if (s == -1) {
1358 		if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1359 			err(1, "socket");
1360 	}
1361 
1362 	return (s);
1363 }
1364 
1365 /*
1366  * Returns the response len if the name is a group, otherwise returns 0.
1367  */
1368 static int
1369 is_a_group(char *name)
1370 {
1371 	ENTRY	 		 item;
1372 	ENTRY			*ret_item;
1373 
1374 	item.key = name;
1375 	if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1376 		return (0);
1377 
1378 	return (*(int *)ret_item->data);
1379 }
1380 
1381 struct node_host *
1382 ifa_exists(char *ifa_name)
1383 {
1384 	struct node_host	*n;
1385 
1386 	if (iftab == NULL)
1387 		ifa_load();
1388 
1389 	/* check whether this is a group */
1390 	if (is_a_group(ifa_name)) {
1391 		/* fake a node_host */
1392 		if ((n = calloc(1, sizeof(*n))) == NULL)
1393 			err(1, "calloc");
1394 		if ((n->ifname = strdup(ifa_name)) == NULL)
1395 			err(1, "strdup");
1396 		return (n);
1397 	}
1398 
1399 	for (n = iftab; n; n = n->next) {
1400 		if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1401 			return (n);
1402 	}
1403 
1404 	return (NULL);
1405 }
1406 
1407 struct node_host *
1408 ifa_grouplookup(char *ifa_name, int flags)
1409 {
1410 	struct ifg_req		*ifg;
1411 	struct ifgroupreq	 ifgr;
1412 	int			 s, len;
1413 	struct node_host	*n, *h = NULL;
1414 
1415 	s = get_query_socket();
1416 	len = is_a_group(ifa_name);
1417 	if (len == 0)
1418 		return (NULL);
1419 	bzero(&ifgr, sizeof(ifgr));
1420 	strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1421 	ifgr.ifgr_len = len;
1422 	if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1423 		err(1, "calloc");
1424 	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1425 		err(1, "SIOCGIFGMEMB");
1426 
1427 	for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1428 	    ifg++) {
1429 		len -= sizeof(struct ifg_req);
1430 		if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1431 			continue;
1432 		if (h == NULL)
1433 			h = n;
1434 		else {
1435 			h->tail->next = n;
1436 			h->tail = n->tail;
1437 		}
1438 	}
1439 	free(ifgr.ifgr_groups);
1440 
1441 	return (h);
1442 }
1443 
1444 struct node_host *
1445 ifa_lookup(char *ifa_name, int flags)
1446 {
1447 	struct node_host	*p = NULL, *h = NULL, *n = NULL;
1448 	int			 got4 = 0, got6 = 0;
1449 	const char		 *last_if = NULL;
1450 
1451 	/* first load iftab and isgroup_map */
1452 	if (iftab == NULL)
1453 		ifa_load();
1454 
1455 	if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1456 		return (h);
1457 
1458 	if (!strncmp(ifa_name, "self", IFNAMSIZ))
1459 		ifa_name = NULL;
1460 
1461 	for (p = iftab; p; p = p->next) {
1462 		if (ifa_skip_if(ifa_name, p))
1463 			continue;
1464 		if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1465 			continue;
1466 		if ((flags & PFI_AFLAG_BROADCAST) &&
1467 		    !(p->ifa_flags & IFF_BROADCAST))
1468 			continue;
1469 		if ((flags & PFI_AFLAG_PEER) &&
1470 		    !(p->ifa_flags & IFF_POINTOPOINT))
1471 			continue;
1472 		if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1473 			continue;
1474 		if (last_if == NULL || strcmp(last_if, p->ifname))
1475 			got4 = got6 = 0;
1476 		last_if = p->ifname;
1477 		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1478 			continue;
1479 		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1480 		    IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1481 			continue;
1482 		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1483 			continue;
1484 		if (p->af == AF_INET)
1485 			got4 = 1;
1486 		else
1487 			got6 = 1;
1488 		n = calloc(1, sizeof(struct node_host));
1489 		if (n == NULL)
1490 			err(1, "address: calloc");
1491 		n->af = p->af;
1492 		if (flags & PFI_AFLAG_BROADCAST)
1493 			memcpy(&n->addr.v.a.addr, &p->bcast,
1494 			    sizeof(struct pf_addr));
1495 		else if (flags & PFI_AFLAG_PEER)
1496 			memcpy(&n->addr.v.a.addr, &p->peer,
1497 			    sizeof(struct pf_addr));
1498 		else
1499 			memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1500 			    sizeof(struct pf_addr));
1501 		if (flags & PFI_AFLAG_NETWORK)
1502 			set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1503 		else {
1504 			if (n->af == AF_INET) {
1505 				if (p->ifa_flags & IFF_LOOPBACK &&
1506 				    p->ifa_flags & IFF_LINK1)
1507 					memcpy(&n->addr.v.a.mask,
1508 					    &p->addr.v.a.mask,
1509 					    sizeof(struct pf_addr));
1510 				else
1511 					set_ipmask(n, 32);
1512 			} else
1513 				set_ipmask(n, 128);
1514 		}
1515 		n->ifindex = p->ifindex;
1516 		n->ifname = strdup(p->ifname);
1517 
1518 		n->next = NULL;
1519 		n->tail = n;
1520 		if (h == NULL)
1521 			h = n;
1522 		else {
1523 			h->tail->next = n;
1524 			h->tail = n;
1525 		}
1526 	}
1527 	return (h);
1528 }
1529 
1530 int
1531 ifa_skip_if(const char *filter, struct node_host *p)
1532 {
1533 	int	n;
1534 
1535 	if (p->af != AF_INET && p->af != AF_INET6)
1536 		return (1);
1537 	if (filter == NULL || !*filter)
1538 		return (0);
1539 	if (!strcmp(p->ifname, filter))
1540 		return (0);	/* exact match */
1541 	n = strlen(filter);
1542 	if (n < 1 || n >= IFNAMSIZ)
1543 		return (1);	/* sanity check */
1544 	if (filter[n-1] >= '0' && filter[n-1] <= '9')
1545 		return (1);	/* only do exact match in that case */
1546 	if (strncmp(p->ifname, filter, n))
1547 		return (1);	/* prefix doesn't match */
1548 	return (p->ifname[n] < '0' || p->ifname[n] > '9');
1549 }
1550 
1551 
1552 struct node_host *
1553 host(const char *s)
1554 {
1555 	struct node_host	*h = NULL;
1556 	int			 mask, v4mask, v6mask, cont = 1;
1557 	char			*p, *q, *ps;
1558 
1559 	if ((p = strrchr(s, '/')) != NULL) {
1560 		mask = strtol(p+1, &q, 0);
1561 		if (!q || *q || mask > 128 || q == (p+1)) {
1562 			fprintf(stderr, "invalid netmask '%s'\n", p);
1563 			return (NULL);
1564 		}
1565 		if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1566 			err(1, "host: malloc");
1567 		strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1568 		v4mask = v6mask = mask;
1569 	} else {
1570 		if ((ps = strdup(s)) == NULL)
1571 			err(1, "host: strdup");
1572 		v4mask = 32;
1573 		v6mask = 128;
1574 		mask = -1;
1575 	}
1576 
1577 	/* IPv4 address? */
1578 	if (cont && (h = host_v4(s, mask)) != NULL)
1579 		cont = 0;
1580 
1581 	/* IPv6 address? */
1582 	if (cont && (h = host_v6(ps, v6mask)) != NULL)
1583 		cont = 0;
1584 
1585 	/* interface with this name exists? */
1586 	/* expensive with thousands of interfaces - prioritze IPv4/6 check */
1587 	if (cont && (h = host_if(ps, mask)) != NULL)
1588 		cont = 0;
1589 
1590 	/* dns lookup */
1591 	if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1592 		cont = 0;
1593 	free(ps);
1594 
1595 	if (h == NULL || cont == 1) {
1596 		fprintf(stderr, "no IP address found for %s\n", s);
1597 		return (NULL);
1598 	}
1599 	return (h);
1600 }
1601 
1602 struct node_host *
1603 host_if(const char *s, int mask)
1604 {
1605 	struct node_host	*n, *h = NULL;
1606 	char			*p, *ps;
1607 	int			 flags = 0;
1608 
1609 	if ((ps = strdup(s)) == NULL)
1610 		err(1, "host_if: strdup");
1611 	while ((p = strrchr(ps, ':')) != NULL) {
1612 		if (!strcmp(p+1, "network"))
1613 			flags |= PFI_AFLAG_NETWORK;
1614 		else if (!strcmp(p+1, "broadcast"))
1615 			flags |= PFI_AFLAG_BROADCAST;
1616 		else if (!strcmp(p+1, "peer"))
1617 			flags |= PFI_AFLAG_PEER;
1618 		else if (!strcmp(p+1, "0"))
1619 			flags |= PFI_AFLAG_NOALIAS;
1620 		else {
1621 			free(ps);
1622 			return (NULL);
1623 		}
1624 		*p = '\0';
1625 	}
1626 	if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1627 		fprintf(stderr, "illegal combination of interface modifiers\n");
1628 		free(ps);
1629 		return (NULL);
1630 	}
1631 	if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1632 		fprintf(stderr, "network or broadcast lookup, but "
1633 		    "extra netmask given\n");
1634 		free(ps);
1635 		return (NULL);
1636 	}
1637 	if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1638 		/* interface with this name exists */
1639 		h = ifa_lookup(ps, flags);
1640 		for (n = h; n != NULL && mask > -1; n = n->next)
1641 			set_ipmask(n, mask);
1642 	}
1643 
1644 	free(ps);
1645 	return (h);
1646 }
1647 
1648 struct node_host *
1649 host_v4(const char *s, int mask)
1650 {
1651 	struct node_host	*h = NULL;
1652 	struct in_addr		 ina;
1653 	int			 bits = 32;
1654 
1655 	memset(&ina, 0, sizeof(struct in_addr));
1656 	if (strrchr(s, '/') != NULL) {
1657 		if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1658 			return (NULL);
1659 	} else {
1660 		if (inet_pton(AF_INET, s, &ina) != 1)
1661 			return (NULL);
1662 	}
1663 
1664 	h = calloc(1, sizeof(struct node_host));
1665 	if (h == NULL)
1666 		err(1, "address: calloc");
1667 	h->ifname = NULL;
1668 	h->af = AF_INET;
1669 	h->addr.v.a.addr.addr32[0] = ina.s_addr;
1670 	set_ipmask(h, bits);
1671 	h->next = NULL;
1672 	h->tail = h;
1673 
1674 	return (h);
1675 }
1676 
1677 struct node_host *
1678 host_v6(const char *s, int mask)
1679 {
1680 	struct addrinfo		 hints, *res;
1681 	struct node_host	*h = NULL;
1682 
1683 	memset(&hints, 0, sizeof(hints));
1684 	hints.ai_family = AF_INET6;
1685 	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1686 	hints.ai_flags = AI_NUMERICHOST;
1687 	if (getaddrinfo(s, "0", &hints, &res) == 0) {
1688 		h = calloc(1, sizeof(struct node_host));
1689 		if (h == NULL)
1690 			err(1, "address: calloc");
1691 		h->ifname = NULL;
1692 		h->af = AF_INET6;
1693 		memcpy(&h->addr.v.a.addr,
1694 		    &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1695 		    sizeof(h->addr.v.a.addr));
1696 		h->ifindex =
1697 		    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1698 		set_ipmask(h, mask);
1699 		freeaddrinfo(res);
1700 		h->next = NULL;
1701 		h->tail = h;
1702 	}
1703 
1704 	return (h);
1705 }
1706 
1707 struct node_host *
1708 host_dns(const char *s, int v4mask, int v6mask)
1709 {
1710 	struct addrinfo		 hints, *res0, *res;
1711 	struct node_host	*n, *h = NULL;
1712 	int			 error, noalias = 0;
1713 	int			 got4 = 0, got6 = 0;
1714 	char			*p, *ps;
1715 
1716 	if ((ps = strdup(s)) == NULL)
1717 		err(1, "host_dns: strdup");
1718 	if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1719 		noalias = 1;
1720 		*p = '\0';
1721 	}
1722 	memset(&hints, 0, sizeof(hints));
1723 	hints.ai_family = PF_UNSPEC;
1724 	hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1725 	error = getaddrinfo(ps, NULL, &hints, &res0);
1726 	if (error) {
1727 		free(ps);
1728 		return (h);
1729 	}
1730 
1731 	for (res = res0; res; res = res->ai_next) {
1732 		if (res->ai_family != AF_INET &&
1733 		    res->ai_family != AF_INET6)
1734 			continue;
1735 		if (noalias) {
1736 			if (res->ai_family == AF_INET) {
1737 				if (got4)
1738 					continue;
1739 				got4 = 1;
1740 			} else {
1741 				if (got6)
1742 					continue;
1743 				got6 = 1;
1744 			}
1745 		}
1746 		n = calloc(1, sizeof(struct node_host));
1747 		if (n == NULL)
1748 			err(1, "host_dns: calloc");
1749 		n->ifname = NULL;
1750 		n->af = res->ai_family;
1751 		if (res->ai_family == AF_INET) {
1752 			memcpy(&n->addr.v.a.addr,
1753 			    &((struct sockaddr_in *)
1754 			    res->ai_addr)->sin_addr.s_addr,
1755 			    sizeof(struct in_addr));
1756 			set_ipmask(n, v4mask);
1757 		} else {
1758 			memcpy(&n->addr.v.a.addr,
1759 			    &((struct sockaddr_in6 *)
1760 			    res->ai_addr)->sin6_addr.s6_addr,
1761 			    sizeof(struct in6_addr));
1762 			n->ifindex =
1763 			    ((struct sockaddr_in6 *)
1764 			    res->ai_addr)->sin6_scope_id;
1765 			set_ipmask(n, v6mask);
1766 		}
1767 		n->next = NULL;
1768 		n->tail = n;
1769 		if (h == NULL)
1770 			h = n;
1771 		else {
1772 			h->tail->next = n;
1773 			h->tail = n;
1774 		}
1775 	}
1776 	freeaddrinfo(res0);
1777 	free(ps);
1778 
1779 	return (h);
1780 }
1781 
1782 /*
1783  * convert a hostname to a list of addresses and put them in the given buffer.
1784  * test:
1785  *	if set to 1, only simple addresses are accepted (no netblock, no "!").
1786  */
1787 int
1788 append_addr(struct pfr_buffer *b, char *s, int test)
1789 {
1790 	char			 *r;
1791 	struct node_host	*h, *n;
1792 	int			 rv, not = 0;
1793 
1794 	for (r = s; *r == '!'; r++)
1795 		not = !not;
1796 	if ((n = host(r)) == NULL) {
1797 		errno = 0;
1798 		return (-1);
1799 	}
1800 	rv = append_addr_host(b, n, test, not);
1801 	do {
1802 		h = n;
1803 		n = n->next;
1804 		free(h);
1805 	} while (n != NULL);
1806 	return (rv);
1807 }
1808 
1809 /*
1810  * same as previous function, but with a pre-parsed input and the ability
1811  * to "negate" the result. Does not free the node_host list.
1812  * not:
1813  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1814  */
1815 int
1816 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1817 {
1818 	int			 bits;
1819 	struct pfr_addr		 addr;
1820 
1821 	do {
1822 		bzero(&addr, sizeof(addr));
1823 		addr.pfra_not = n->not ^ not;
1824 		addr.pfra_af = n->af;
1825 		addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1826 		switch (n->af) {
1827 		case AF_INET:
1828 			addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1829 			bits = 32;
1830 			break;
1831 		case AF_INET6:
1832 			memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1833 			    sizeof(struct in6_addr));
1834 			bits = 128;
1835 			break;
1836 		default:
1837 			errno = EINVAL;
1838 			return (-1);
1839 		}
1840 		if ((test && (not || addr.pfra_net != bits)) ||
1841 		    addr.pfra_net > bits) {
1842 			errno = EINVAL;
1843 			return (-1);
1844 		}
1845 		if (pfr_buf_add(b, &addr))
1846 			return (-1);
1847 	} while ((n = n->next) != NULL);
1848 
1849 	return (0);
1850 }
1851 
1852 int
1853 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1854 {
1855 	struct pfioc_trans_e trans;
1856 
1857 	bzero(&trans, sizeof(trans));
1858 	trans.rs_num = rs_num;
1859 	if (strlcpy(trans.anchor, anchor,
1860 	    sizeof(trans.anchor)) >= sizeof(trans.anchor))
1861 		errx(1, "pfctl_add_trans: strlcpy");
1862 
1863 	return pfr_buf_add(buf, &trans);
1864 }
1865 
1866 u_int32_t
1867 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1868 {
1869 	struct pfioc_trans_e *p;
1870 
1871 	PFRB_FOREACH(p, buf)
1872 		if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1873 			return (p->ticket);
1874 	errx(1, "pfctl_get_ticket: assertion failed");
1875 }
1876 
1877 int
1878 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1879 {
1880 	struct pfioc_trans trans;
1881 
1882 	bzero(&trans, sizeof(trans));
1883 	trans.size = buf->pfrb_size - from;
1884 	trans.esize = sizeof(struct pfioc_trans_e);
1885 	trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1886 	return ioctl(dev, cmd, &trans);
1887 }
1888