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: stable/11/sbin/pfctl/pfctl_parser.c 359573 2020-04-02 18:37:15Z kp $");
38
39#include <sys/types.h>
40#include <sys/ioctl.h>
41#include <sys/socket.h>
42#include <sys/param.h>
43#include <sys/proc.h>
44#include <net/if.h>
45#include <netinet/in.h>
46#include <netinet/in_systm.h>
47#include <netinet/ip.h>
48#include <netinet/ip_icmp.h>
49#include <netinet/icmp6.h>
50#include <net/pfvar.h>
51#include <arpa/inet.h>
52
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <ctype.h>
57#include <netdb.h>
58#include <stdarg.h>
59#include <errno.h>
60#include <err.h>
61#include <ifaddrs.h>
62#include <unistd.h>
63
64#include "pfctl_parser.h"
65#include "pfctl.h"
66
67void		 print_op (u_int8_t, const char *, const char *);
68void		 print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
69void		 print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
70void		 print_flags (u_int8_t);
71void		 print_fromto(struct pf_rule_addr *, pf_osfp_t,
72		    struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
73int		 ifa_skip_if(const char *filter, struct node_host *p);
74
75struct node_host	*ifa_grouplookup(const char *, int);
76struct node_host	*host_if(const char *, int);
77struct node_host	*host_v4(const char *, int);
78struct node_host	*host_v6(const char *, int);
79struct node_host	*host_dns(const char *, int, int);
80
81const char *tcpflags = "FSRPAUEW";
82
83static 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
111static const struct icmptypeent icmp6_type[] = {
112	{ "unreach",	ICMP6_DST_UNREACH },
113	{ "toobig",	ICMP6_PACKET_TOO_BIG },
114	{ "timex",	ICMP6_TIME_EXCEEDED },
115	{ "paramprob",	ICMP6_PARAM_PROB },
116	{ "echoreq",	ICMP6_ECHO_REQUEST },
117	{ "echorep",	ICMP6_ECHO_REPLY },
118	{ "groupqry",	ICMP6_MEMBERSHIP_QUERY },
119	{ "listqry",	MLD_LISTENER_QUERY },
120	{ "grouprep",	ICMP6_MEMBERSHIP_REPORT },
121	{ "listenrep",	MLD_LISTENER_REPORT },
122	{ "groupterm",	ICMP6_MEMBERSHIP_REDUCTION },
123	{ "listendone", MLD_LISTENER_DONE },
124	{ "routersol",	ND_ROUTER_SOLICIT },
125	{ "routeradv",	ND_ROUTER_ADVERT },
126	{ "neighbrsol", ND_NEIGHBOR_SOLICIT },
127	{ "neighbradv", ND_NEIGHBOR_ADVERT },
128	{ "redir",	ND_REDIRECT },
129	{ "routrrenum", ICMP6_ROUTER_RENUMBERING },
130	{ "wrureq",	ICMP6_WRUREQUEST },
131	{ "wrurep",	ICMP6_WRUREPLY },
132	{ "fqdnreq",	ICMP6_FQDN_QUERY },
133	{ "fqdnrep",	ICMP6_FQDN_REPLY },
134	{ "niqry",	ICMP6_NI_QUERY },
135	{ "nirep",	ICMP6_NI_REPLY },
136	{ "mtraceresp",	MLD_MTRACE_RESP },
137	{ "mtrace",	MLD_MTRACE }
138};
139
140static const struct icmpcodeent icmp_code[] = {
141	{ "net-unr",		ICMP_UNREACH,	ICMP_UNREACH_NET },
142	{ "host-unr",		ICMP_UNREACH,	ICMP_UNREACH_HOST },
143	{ "proto-unr",		ICMP_UNREACH,	ICMP_UNREACH_PROTOCOL },
144	{ "port-unr",		ICMP_UNREACH,	ICMP_UNREACH_PORT },
145	{ "needfrag",		ICMP_UNREACH,	ICMP_UNREACH_NEEDFRAG },
146	{ "srcfail",		ICMP_UNREACH,	ICMP_UNREACH_SRCFAIL },
147	{ "net-unk",		ICMP_UNREACH,	ICMP_UNREACH_NET_UNKNOWN },
148	{ "host-unk",		ICMP_UNREACH,	ICMP_UNREACH_HOST_UNKNOWN },
149	{ "isolate",		ICMP_UNREACH,	ICMP_UNREACH_ISOLATED },
150	{ "net-prohib",		ICMP_UNREACH,	ICMP_UNREACH_NET_PROHIB },
151	{ "host-prohib",	ICMP_UNREACH,	ICMP_UNREACH_HOST_PROHIB },
152	{ "net-tos",		ICMP_UNREACH,	ICMP_UNREACH_TOSNET },
153	{ "host-tos",		ICMP_UNREACH,	ICMP_UNREACH_TOSHOST },
154	{ "filter-prohib",	ICMP_UNREACH,	ICMP_UNREACH_FILTER_PROHIB },
155	{ "host-preced",	ICMP_UNREACH,	ICMP_UNREACH_HOST_PRECEDENCE },
156	{ "cutoff-preced",	ICMP_UNREACH,	ICMP_UNREACH_PRECEDENCE_CUTOFF },
157	{ "redir-net",		ICMP_REDIRECT,	ICMP_REDIRECT_NET },
158	{ "redir-host",		ICMP_REDIRECT,	ICMP_REDIRECT_HOST },
159	{ "redir-tos-net",	ICMP_REDIRECT,	ICMP_REDIRECT_TOSNET },
160	{ "redir-tos-host",	ICMP_REDIRECT,	ICMP_REDIRECT_TOSHOST },
161	{ "normal-adv",		ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
162	{ "common-adv",		ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
163	{ "transit",		ICMP_TIMXCEED,	ICMP_TIMXCEED_INTRANS },
164	{ "reassemb",		ICMP_TIMXCEED,	ICMP_TIMXCEED_REASS },
165	{ "badhead",		ICMP_PARAMPROB,	ICMP_PARAMPROB_ERRATPTR },
166	{ "optmiss",		ICMP_PARAMPROB,	ICMP_PARAMPROB_OPTABSENT },
167	{ "badlen",		ICMP_PARAMPROB,	ICMP_PARAMPROB_LENGTH },
168	{ "unknown-ind",	ICMP_PHOTURIS,	ICMP_PHOTURIS_UNKNOWN_INDEX },
169	{ "auth-fail",		ICMP_PHOTURIS,	ICMP_PHOTURIS_AUTH_FAILED },
170	{ "decrypt-fail",	ICMP_PHOTURIS,	ICMP_PHOTURIS_DECRYPT_FAILED }
171};
172
173static const struct icmpcodeent icmp6_code[] = {
174	{ "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
175	{ "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
176	{ "notnbr-unr",	ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
177	{ "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
178	{ "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
179	{ "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
180	{ "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
181	{ "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
182	{ "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
183	{ "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
184	{ "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
185	{ "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
186};
187
188const struct pf_timeout pf_timeouts[] = {
189	{ "tcp.first",		PFTM_TCP_FIRST_PACKET },
190	{ "tcp.opening",	PFTM_TCP_OPENING },
191	{ "tcp.established",	PFTM_TCP_ESTABLISHED },
192	{ "tcp.closing",	PFTM_TCP_CLOSING },
193	{ "tcp.finwait",	PFTM_TCP_FIN_WAIT },
194	{ "tcp.closed",		PFTM_TCP_CLOSED },
195	{ "tcp.tsdiff",		PFTM_TS_DIFF },
196	{ "udp.first",		PFTM_UDP_FIRST_PACKET },
197	{ "udp.single",		PFTM_UDP_SINGLE },
198	{ "udp.multiple",	PFTM_UDP_MULTIPLE },
199	{ "icmp.first",		PFTM_ICMP_FIRST_PACKET },
200	{ "icmp.error",		PFTM_ICMP_ERROR_REPLY },
201	{ "other.first",	PFTM_OTHER_FIRST_PACKET },
202	{ "other.single",	PFTM_OTHER_SINGLE },
203	{ "other.multiple",	PFTM_OTHER_MULTIPLE },
204	{ "frag",		PFTM_FRAG },
205	{ "interval",		PFTM_INTERVAL },
206	{ "adaptive.start",	PFTM_ADAPTIVE_START },
207	{ "adaptive.end",	PFTM_ADAPTIVE_END },
208	{ "src.track",		PFTM_SRC_NODE },
209	{ NULL,			0 }
210};
211
212const struct icmptypeent *
213geticmptypebynumber(u_int8_t type, sa_family_t af)
214{
215	unsigned int	i;
216
217	if (af != AF_INET6) {
218		for (i=0; i < nitems(icmp_type); i++) {
219			if (type == icmp_type[i].type)
220				return (&icmp_type[i]);
221		}
222	} else {
223		for (i=0; i < nitems(icmp6_type); i++) {
224			if (type == icmp6_type[i].type)
225				 return (&icmp6_type[i]);
226		}
227	}
228	return (NULL);
229}
230
231const struct icmptypeent *
232geticmptypebyname(char *w, sa_family_t af)
233{
234	unsigned int	i;
235
236	if (af != AF_INET6) {
237		for (i=0; i < nitems(icmp_type); i++) {
238			if (!strcmp(w, icmp_type[i].name))
239				return (&icmp_type[i]);
240		}
241	} else {
242		for (i=0; i < nitems(icmp6_type); i++) {
243			if (!strcmp(w, icmp6_type[i].name))
244				return (&icmp6_type[i]);
245		}
246	}
247	return (NULL);
248}
249
250const struct icmpcodeent *
251geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
252{
253	unsigned int	i;
254
255	if (af != AF_INET6) {
256		for (i=0; i < nitems(icmp_code); i++) {
257			if (type == icmp_code[i].type &&
258			    code == icmp_code[i].code)
259				return (&icmp_code[i]);
260		}
261	} else {
262		for (i=0; i < nitems(icmp6_code); i++) {
263			if (type == icmp6_code[i].type &&
264			    code == icmp6_code[i].code)
265				return (&icmp6_code[i]);
266		}
267	}
268	return (NULL);
269}
270
271const struct icmpcodeent *
272geticmpcodebyname(u_long type, char *w, sa_family_t af)
273{
274	unsigned int	i;
275
276	if (af != AF_INET6) {
277		for (i=0; i < nitems(icmp_code); i++) {
278			if (type == icmp_code[i].type &&
279			    !strcmp(w, icmp_code[i].name))
280				return (&icmp_code[i]);
281		}
282	} else {
283		for (i=0; i < nitems(icmp6_code); i++) {
284			if (type == icmp6_code[i].type &&
285			    !strcmp(w, icmp6_code[i].name))
286				return (&icmp6_code[i]);
287		}
288	}
289	return (NULL);
290}
291
292void
293print_op(u_int8_t op, const char *a1, const char *a2)
294{
295	if (op == PF_OP_IRG)
296		printf(" %s >< %s", a1, a2);
297	else if (op == PF_OP_XRG)
298		printf(" %s <> %s", a1, a2);
299	else if (op == PF_OP_EQ)
300		printf(" = %s", a1);
301	else if (op == PF_OP_NE)
302		printf(" != %s", a1);
303	else if (op == PF_OP_LT)
304		printf(" < %s", a1);
305	else if (op == PF_OP_LE)
306		printf(" <= %s", a1);
307	else if (op == PF_OP_GT)
308		printf(" > %s", a1);
309	else if (op == PF_OP_GE)
310		printf(" >= %s", a1);
311	else if (op == PF_OP_RRG)
312		printf(" %s:%s", a1, a2);
313}
314
315void
316print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
317{
318	char		 a1[6], a2[6];
319	struct servent	*s;
320
321	if (!numeric)
322		s = getservbyport(p1, proto);
323	else
324		s = NULL;
325	p1 = ntohs(p1);
326	p2 = ntohs(p2);
327	snprintf(a1, sizeof(a1), "%u", p1);
328	snprintf(a2, sizeof(a2), "%u", p2);
329	printf(" port");
330	if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
331		print_op(op, s->s_name, a2);
332	else
333		print_op(op, a1, a2);
334}
335
336void
337print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
338{
339	char	a1[11], a2[11];
340
341	snprintf(a1, sizeof(a1), "%u", u1);
342	snprintf(a2, sizeof(a2), "%u", u2);
343	printf(" %s", t);
344	if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
345		print_op(op, "unknown", a2);
346	else
347		print_op(op, a1, a2);
348}
349
350void
351print_flags(u_int8_t f)
352{
353	int	i;
354
355	for (i = 0; tcpflags[i]; ++i)
356		if (f & (1 << i))
357			printf("%c", tcpflags[i]);
358}
359
360void
361print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
362    sa_family_t af, u_int8_t proto, int verbose, int numeric)
363{
364	char buf[PF_OSFP_LEN*3];
365	if (src->addr.type == PF_ADDR_ADDRMASK &&
366	    dst->addr.type == PF_ADDR_ADDRMASK &&
367	    PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
368	    PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
369	    PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
370	    PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
371	    !src->neg && !dst->neg &&
372	    !src->port_op && !dst->port_op &&
373	    osfp == PF_OSFP_ANY)
374		printf(" all");
375	else {
376		printf(" from ");
377		if (src->neg)
378			printf("! ");
379		print_addr(&src->addr, af, verbose);
380		if (src->port_op)
381			print_port(src->port_op, src->port[0],
382			    src->port[1],
383			    proto == IPPROTO_TCP ? "tcp" : "udp",
384			    numeric);
385		if (osfp != PF_OSFP_ANY)
386			printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
387			    sizeof(buf)));
388
389		printf(" to ");
390		if (dst->neg)
391			printf("! ");
392		print_addr(&dst->addr, af, verbose);
393		if (dst->port_op)
394			print_port(dst->port_op, dst->port[0],
395			    dst->port[1],
396			    proto == IPPROTO_TCP ? "tcp" : "udp",
397			    numeric);
398	}
399}
400
401void
402print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
403    sa_family_t af, int id)
404{
405	struct pf_pooladdr	*pooladdr;
406
407	if ((TAILQ_FIRST(&pool->list) != NULL) &&
408	    TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
409		printf("{ ");
410	TAILQ_FOREACH(pooladdr, &pool->list, entries){
411		switch (id) {
412		case PF_NAT:
413		case PF_RDR:
414		case PF_BINAT:
415			print_addr(&pooladdr->addr, af, 0);
416			break;
417		case PF_PASS:
418			if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
419				printf("%s", pooladdr->ifname);
420			else {
421				printf("(%s ", pooladdr->ifname);
422				print_addr(&pooladdr->addr, af, 0);
423				printf(")");
424			}
425			break;
426		default:
427			break;
428		}
429		if (TAILQ_NEXT(pooladdr, entries) != NULL)
430			printf(", ");
431		else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
432			printf(" }");
433	}
434	switch (id) {
435	case PF_NAT:
436		if ((p1 != PF_NAT_PROXY_PORT_LOW ||
437		    p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
438			if (p1 == p2)
439				printf(" port %u", p1);
440			else
441				printf(" port %u:%u", p1, p2);
442		}
443		break;
444	case PF_RDR:
445		if (p1) {
446			printf(" port %u", p1);
447			if (p2 && (p2 != p1))
448				printf(":%u", p2);
449		}
450		break;
451	default:
452		break;
453	}
454	switch (pool->opts & PF_POOL_TYPEMASK) {
455	case PF_POOL_NONE:
456		break;
457	case PF_POOL_BITMASK:
458		printf(" bitmask");
459		break;
460	case PF_POOL_RANDOM:
461		printf(" random");
462		break;
463	case PF_POOL_SRCHASH:
464		printf(" source-hash 0x%08x%08x%08x%08x",
465		    pool->key.key32[0], pool->key.key32[1],
466		    pool->key.key32[2], pool->key.key32[3]);
467		break;
468	case PF_POOL_ROUNDROBIN:
469		printf(" round-robin");
470		break;
471	}
472	if (pool->opts & PF_POOL_STICKYADDR)
473		printf(" sticky-address");
474	if (id == PF_NAT && p1 == 0 && p2 == 0)
475		printf(" static-port");
476}
477
478const char	*pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
479const char	*pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
480const char	*pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
481const char	*pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
482
483void
484print_status(struct pf_status *s, int opts)
485{
486	char			statline[80], *running;
487	time_t			runtime;
488	int			i;
489	char			buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
490	static const char	hex[] = "0123456789abcdef";
491
492	runtime = time(NULL) - s->since;
493	running = s->running ? "Enabled" : "Disabled";
494
495	if (s->since) {
496		unsigned int	sec, min, hrs, day = runtime;
497
498		sec = day % 60;
499		day /= 60;
500		min = day % 60;
501		day /= 60;
502		hrs = day % 24;
503		day /= 24;
504		snprintf(statline, sizeof(statline),
505		    "Status: %s for %u days %.2u:%.2u:%.2u",
506		    running, day, hrs, min, sec);
507	} else
508		snprintf(statline, sizeof(statline), "Status: %s", running);
509	printf("%-44s", statline);
510	switch (s->debug) {
511	case PF_DEBUG_NONE:
512		printf("%15s\n\n", "Debug: None");
513		break;
514	case PF_DEBUG_URGENT:
515		printf("%15s\n\n", "Debug: Urgent");
516		break;
517	case PF_DEBUG_MISC:
518		printf("%15s\n\n", "Debug: Misc");
519		break;
520	case PF_DEBUG_NOISY:
521		printf("%15s\n\n", "Debug: Loud");
522		break;
523	}
524
525	if (opts & PF_OPT_VERBOSE) {
526		printf("Hostid:   0x%08x\n", ntohl(s->hostid));
527
528		for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
529			buf[i + i] = hex[s->pf_chksum[i] >> 4];
530			buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
531		}
532		buf[i + i] = '\0';
533		printf("Checksum: 0x%s\n\n", buf);
534	}
535
536	if (s->ifname[0] != 0) {
537		printf("Interface Stats for %-16s %5s %16s\n",
538		    s->ifname, "IPv4", "IPv6");
539		printf("  %-25s %14llu %16llu\n", "Bytes In",
540		    (unsigned long long)s->bcounters[0][0],
541		    (unsigned long long)s->bcounters[1][0]);
542		printf("  %-25s %14llu %16llu\n", "Bytes Out",
543		    (unsigned long long)s->bcounters[0][1],
544		    (unsigned long long)s->bcounters[1][1]);
545		printf("  Packets In\n");
546		printf("    %-23s %14llu %16llu\n", "Passed",
547		    (unsigned long long)s->pcounters[0][0][PF_PASS],
548		    (unsigned long long)s->pcounters[1][0][PF_PASS]);
549		printf("    %-23s %14llu %16llu\n", "Blocked",
550		    (unsigned long long)s->pcounters[0][0][PF_DROP],
551		    (unsigned long long)s->pcounters[1][0][PF_DROP]);
552		printf("  Packets Out\n");
553		printf("    %-23s %14llu %16llu\n", "Passed",
554		    (unsigned long long)s->pcounters[0][1][PF_PASS],
555		    (unsigned long long)s->pcounters[1][1][PF_PASS]);
556		printf("    %-23s %14llu %16llu\n\n", "Blocked",
557		    (unsigned long long)s->pcounters[0][1][PF_DROP],
558		    (unsigned long long)s->pcounters[1][1][PF_DROP]);
559	}
560	printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
561	printf("  %-25s %14u %14s\n", "current entries", s->states, "");
562	for (i = 0; i < FCNT_MAX; i++) {
563		printf("  %-25s %14llu ", pf_fcounters[i],
564			    (unsigned long long)s->fcounters[i]);
565		if (runtime > 0)
566			printf("%14.1f/s\n",
567			    (double)s->fcounters[i] / (double)runtime);
568		else
569			printf("%14s\n", "");
570	}
571	if (opts & PF_OPT_VERBOSE) {
572		printf("Source Tracking Table\n");
573		printf("  %-25s %14u %14s\n", "current entries",
574		    s->src_nodes, "");
575		for (i = 0; i < SCNT_MAX; i++) {
576			printf("  %-25s %14lld ", pf_scounters[i],
577#ifdef __FreeBSD__
578				    (long long)s->scounters[i]);
579#else
580				    s->scounters[i]);
581#endif
582			if (runtime > 0)
583				printf("%14.1f/s\n",
584				    (double)s->scounters[i] / (double)runtime);
585			else
586				printf("%14s\n", "");
587		}
588	}
589	printf("Counters\n");
590	for (i = 0; i < PFRES_MAX; i++) {
591		printf("  %-25s %14llu ", pf_reasons[i],
592		    (unsigned long long)s->counters[i]);
593		if (runtime > 0)
594			printf("%14.1f/s\n",
595			    (double)s->counters[i] / (double)runtime);
596		else
597			printf("%14s\n", "");
598	}
599	if (opts & PF_OPT_VERBOSE) {
600		printf("Limit Counters\n");
601		for (i = 0; i < LCNT_MAX; i++) {
602			printf("  %-25s %14lld ", pf_lcounters[i],
603#ifdef __FreeBSD__
604				    (unsigned long long)s->lcounters[i]);
605#else
606				    s->lcounters[i]);
607#endif
608			if (runtime > 0)
609				printf("%14.1f/s\n",
610				    (double)s->lcounters[i] / (double)runtime);
611			else
612				printf("%14s\n", "");
613		}
614	}
615}
616
617void
618print_running(struct pf_status *status)
619{
620	printf("%s\n", status->running ? "Enabled" : "Disabled");
621}
622
623void
624print_src_node(struct pf_src_node *sn, int opts)
625{
626	struct pf_addr_wrap aw;
627	int min, sec;
628
629	memset(&aw, 0, sizeof(aw));
630	if (sn->af == AF_INET)
631		aw.v.a.mask.addr32[0] = 0xffffffff;
632	else
633		memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
634
635	aw.v.a.addr = sn->addr;
636	print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
637	printf(" -> ");
638	aw.v.a.addr = sn->raddr;
639	print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
640	printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
641	    sn->conn, sn->conn_rate.count / 1000,
642	    (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
643	if (opts & PF_OPT_VERBOSE) {
644		sec = sn->creation % 60;
645		sn->creation /= 60;
646		min = sn->creation % 60;
647		sn->creation /= 60;
648		printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
649		if (sn->states == 0) {
650			sec = sn->expire % 60;
651			sn->expire /= 60;
652			min = sn->expire % 60;
653			sn->expire /= 60;
654			printf(", expires in %.2u:%.2u:%.2u",
655			    sn->expire, min, sec);
656		}
657		printf(", %llu pkts, %llu bytes",
658#ifdef __FreeBSD__
659		    (unsigned long long)(sn->packets[0] + sn->packets[1]),
660		    (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
661#else
662		    sn->packets[0] + sn->packets[1],
663		    sn->bytes[0] + sn->bytes[1]);
664#endif
665		switch (sn->ruletype) {
666		case PF_NAT:
667			if (sn->rule.nr != -1)
668				printf(", nat rule %u", sn->rule.nr);
669			break;
670		case PF_RDR:
671			if (sn->rule.nr != -1)
672				printf(", rdr rule %u", sn->rule.nr);
673			break;
674		case PF_PASS:
675			if (sn->rule.nr != -1)
676				printf(", filter rule %u", sn->rule.nr);
677			break;
678		}
679		printf("\n");
680	}
681}
682
683void
684print_rule(struct pf_rule *r, const char *anchor_call, int verbose, int numeric)
685{
686	static const char *actiontypes[] = { "pass", "block", "scrub",
687	    "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
688	static const char *anchortypes[] = { "anchor", "anchor", "anchor",
689	    "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
690	    "binat-anchor", "rdr-anchor", "rdr-anchor" };
691	int	i, opts;
692
693	if (verbose)
694		printf("@%d ", r->nr);
695	if (r->action > PF_NORDR)
696		printf("action(%d)", r->action);
697	else if (anchor_call[0]) {
698		if (anchor_call[0] == '_') {
699			printf("%s", anchortypes[r->action]);
700		} else
701			printf("%s \"%s\"", anchortypes[r->action],
702			    anchor_call);
703	} else {
704		printf("%s", actiontypes[r->action]);
705		if (r->natpass)
706			printf(" pass");
707	}
708	if (r->action == PF_DROP) {
709		if (r->rule_flag & PFRULE_RETURN)
710			printf(" return");
711		else if (r->rule_flag & PFRULE_RETURNRST) {
712			if (!r->return_ttl)
713				printf(" return-rst");
714			else
715				printf(" return-rst(ttl %d)", r->return_ttl);
716		} else if (r->rule_flag & PFRULE_RETURNICMP) {
717			const struct icmpcodeent	*ic, *ic6;
718
719			ic = geticmpcodebynumber(r->return_icmp >> 8,
720			    r->return_icmp & 255, AF_INET);
721			ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
722			    r->return_icmp6 & 255, AF_INET6);
723
724			switch (r->af) {
725			case AF_INET:
726				printf(" return-icmp");
727				if (ic == NULL)
728					printf("(%u)", r->return_icmp & 255);
729				else
730					printf("(%s)", ic->name);
731				break;
732			case AF_INET6:
733				printf(" return-icmp6");
734				if (ic6 == NULL)
735					printf("(%u)", r->return_icmp6 & 255);
736				else
737					printf("(%s)", ic6->name);
738				break;
739			default:
740				printf(" return-icmp");
741				if (ic == NULL)
742					printf("(%u, ", r->return_icmp & 255);
743				else
744					printf("(%s, ", ic->name);
745				if (ic6 == NULL)
746					printf("%u)", r->return_icmp6 & 255);
747				else
748					printf("%s)", ic6->name);
749				break;
750			}
751		} else
752			printf(" drop");
753	}
754	if (r->direction == PF_IN)
755		printf(" in");
756	else if (r->direction == PF_OUT)
757		printf(" out");
758	if (r->log) {
759		printf(" log");
760		if (r->log & ~PF_LOG || r->logif) {
761			int count = 0;
762
763			printf(" (");
764			if (r->log & PF_LOG_ALL)
765				printf("%sall", count++ ? ", " : "");
766			if (r->log & PF_LOG_SOCKET_LOOKUP)
767				printf("%suser", count++ ? ", " : "");
768			if (r->logif)
769				printf("%sto pflog%u", count++ ? ", " : "",
770				    r->logif);
771			printf(")");
772		}
773	}
774	if (r->quick)
775		printf(" quick");
776	if (r->ifname[0]) {
777		if (r->ifnot)
778			printf(" on ! %s", r->ifname);
779		else
780			printf(" on %s", r->ifname);
781	}
782	if (r->rt) {
783		if (r->rt == PF_ROUTETO)
784			printf(" route-to");
785		else if (r->rt == PF_REPLYTO)
786			printf(" reply-to");
787		else if (r->rt == PF_DUPTO)
788			printf(" dup-to");
789		else if (r->rt == PF_FASTROUTE)
790			printf(" fastroute");
791		if (r->rt != PF_FASTROUTE) {
792			printf(" ");
793			print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
794		}
795	}
796	if (r->af) {
797		if (r->af == AF_INET)
798			printf(" inet");
799		else
800			printf(" inet6");
801	}
802	if (r->proto) {
803		struct protoent	*p;
804
805		if ((p = getprotobynumber(r->proto)) != NULL)
806			printf(" proto %s", p->p_name);
807		else
808			printf(" proto %u", r->proto);
809	}
810	print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
811	    verbose, numeric);
812	if (r->uid.op)
813		print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
814		    UID_MAX);
815	if (r->gid.op)
816		print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
817		    GID_MAX);
818	if (r->flags || r->flagset) {
819		printf(" flags ");
820		print_flags(r->flags);
821		printf("/");
822		print_flags(r->flagset);
823	} else if (r->action == PF_PASS &&
824	    (!r->proto || r->proto == IPPROTO_TCP) &&
825	    !(r->rule_flag & PFRULE_FRAGMENT) &&
826	    !anchor_call[0] && r->keep_state)
827		printf(" flags any");
828	if (r->type) {
829		const struct icmptypeent	*it;
830
831		it = geticmptypebynumber(r->type-1, r->af);
832		if (r->af != AF_INET6)
833			printf(" icmp-type");
834		else
835			printf(" icmp6-type");
836		if (it != NULL)
837			printf(" %s", it->name);
838		else
839			printf(" %u", r->type-1);
840		if (r->code) {
841			const struct icmpcodeent	*ic;
842
843			ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
844			if (ic != NULL)
845				printf(" code %s", ic->name);
846			else
847				printf(" code %u", r->code-1);
848		}
849	}
850	if (r->tos)
851		printf(" tos 0x%2.2x", r->tos);
852	if (r->prio)
853		printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
854	if (r->scrub_flags & PFSTATE_SETMASK) {
855		char *comma = "";
856		printf(" set (");
857		if (r->scrub_flags & PFSTATE_SETPRIO) {
858			if (r->set_prio[0] == r->set_prio[1])
859				printf("%s prio %u", comma, r->set_prio[0]);
860			else
861				printf("%s prio(%u, %u)", comma, r->set_prio[0],
862				    r->set_prio[1]);
863			comma = ",";
864		}
865		printf(" )");
866	}
867	if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
868		printf(" no state");
869	else if (r->keep_state == PF_STATE_NORMAL)
870		printf(" keep state");
871	else if (r->keep_state == PF_STATE_MODULATE)
872		printf(" modulate state");
873	else if (r->keep_state == PF_STATE_SYNPROXY)
874		printf(" synproxy state");
875	if (r->prob) {
876		char	buf[20];
877
878		snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
879		for (i = strlen(buf)-1; i > 0; i--) {
880			if (buf[i] == '0')
881				buf[i] = '\0';
882			else {
883				if (buf[i] == '.')
884					buf[i] = '\0';
885				break;
886			}
887		}
888		printf(" probability %s%%", buf);
889	}
890	opts = 0;
891	if (r->max_states || r->max_src_nodes || r->max_src_states)
892		opts = 1;
893	if (r->rule_flag & PFRULE_NOSYNC)
894		opts = 1;
895	if (r->rule_flag & PFRULE_SRCTRACK)
896		opts = 1;
897	if (r->rule_flag & PFRULE_IFBOUND)
898		opts = 1;
899	if (r->rule_flag & PFRULE_STATESLOPPY)
900		opts = 1;
901	for (i = 0; !opts && i < PFTM_MAX; ++i)
902		if (r->timeout[i])
903			opts = 1;
904	if (opts) {
905		printf(" (");
906		if (r->max_states) {
907			printf("max %u", r->max_states);
908			opts = 0;
909		}
910		if (r->rule_flag & PFRULE_NOSYNC) {
911			if (!opts)
912				printf(", ");
913			printf("no-sync");
914			opts = 0;
915		}
916		if (r->rule_flag & PFRULE_SRCTRACK) {
917			if (!opts)
918				printf(", ");
919			printf("source-track");
920			if (r->rule_flag & PFRULE_RULESRCTRACK)
921				printf(" rule");
922			else
923				printf(" global");
924			opts = 0;
925		}
926		if (r->max_src_states) {
927			if (!opts)
928				printf(", ");
929			printf("max-src-states %u", r->max_src_states);
930			opts = 0;
931		}
932		if (r->max_src_conn) {
933			if (!opts)
934				printf(", ");
935			printf("max-src-conn %u", r->max_src_conn);
936			opts = 0;
937		}
938		if (r->max_src_conn_rate.limit) {
939			if (!opts)
940				printf(", ");
941			printf("max-src-conn-rate %u/%u",
942			    r->max_src_conn_rate.limit,
943			    r->max_src_conn_rate.seconds);
944			opts = 0;
945		}
946		if (r->max_src_nodes) {
947			if (!opts)
948				printf(", ");
949			printf("max-src-nodes %u", r->max_src_nodes);
950			opts = 0;
951		}
952		if (r->overload_tblname[0]) {
953			if (!opts)
954				printf(", ");
955			printf("overload <%s>", r->overload_tblname);
956			if (r->flush)
957				printf(" flush");
958			if (r->flush & PF_FLUSH_GLOBAL)
959				printf(" global");
960		}
961		if (r->rule_flag & PFRULE_IFBOUND) {
962			if (!opts)
963				printf(", ");
964			printf("if-bound");
965			opts = 0;
966		}
967		if (r->rule_flag & PFRULE_STATESLOPPY) {
968			if (!opts)
969				printf(", ");
970			printf("sloppy");
971			opts = 0;
972		}
973		for (i = 0; i < PFTM_MAX; ++i)
974			if (r->timeout[i]) {
975				int j;
976
977				if (!opts)
978					printf(", ");
979				opts = 0;
980				for (j = 0; pf_timeouts[j].name != NULL;
981				    ++j)
982					if (pf_timeouts[j].timeout == i)
983						break;
984				printf("%s %u", pf_timeouts[j].name == NULL ?
985				    "inv.timeout" : pf_timeouts[j].name,
986				    r->timeout[i]);
987			}
988		printf(")");
989	}
990	if (r->rule_flag & PFRULE_FRAGMENT)
991		printf(" fragment");
992	if (r->rule_flag & PFRULE_NODF)
993		printf(" no-df");
994	if (r->rule_flag & PFRULE_RANDOMID)
995		printf(" random-id");
996	if (r->min_ttl)
997		printf(" min-ttl %d", r->min_ttl);
998	if (r->max_mss)
999		printf(" max-mss %d", r->max_mss);
1000	if (r->rule_flag & PFRULE_SET_TOS)
1001		printf(" set-tos 0x%2.2x", r->set_tos);
1002	if (r->allow_opts)
1003		printf(" allow-opts");
1004	if (r->action == PF_SCRUB) {
1005		if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1006			printf(" reassemble tcp");
1007
1008		printf(" fragment reassemble");
1009	}
1010	if (r->label[0])
1011		printf(" label \"%s\"", r->label);
1012	if (r->qname[0] && r->pqname[0])
1013		printf(" queue(%s, %s)", r->qname, r->pqname);
1014	else if (r->qname[0])
1015		printf(" queue %s", r->qname);
1016	if (r->tagname[0])
1017		printf(" tag %s", r->tagname);
1018	if (r->match_tagname[0]) {
1019		if (r->match_tag_not)
1020			printf(" !");
1021		printf(" tagged %s", r->match_tagname);
1022	}
1023	if (r->rtableid != -1)
1024		printf(" rtable %u", r->rtableid);
1025	if (r->divert.port) {
1026#ifdef __FreeBSD__
1027		printf(" divert-to %u", ntohs(r->divert.port));
1028#else
1029		if (PF_AZERO(&r->divert.addr, r->af)) {
1030			printf(" divert-reply");
1031		} else {
1032			/* XXX cut&paste from print_addr */
1033			char buf[48];
1034
1035			printf(" divert-to ");
1036			if (inet_ntop(r->af, &r->divert.addr, buf,
1037			    sizeof(buf)) == NULL)
1038				printf("?");
1039			else
1040				printf("%s", buf);
1041			printf(" port %u", ntohs(r->divert.port));
1042		}
1043#endif
1044	}
1045	if (!anchor_call[0] && (r->action == PF_NAT ||
1046	    r->action == PF_BINAT || r->action == PF_RDR)) {
1047		printf(" -> ");
1048		print_pool(&r->rpool, r->rpool.proxy_port[0],
1049		    r->rpool.proxy_port[1], r->af, r->action);
1050	}
1051}
1052
1053void
1054print_tabledef(const char *name, int flags, int addrs,
1055    struct node_tinithead *nodes)
1056{
1057	struct node_tinit	*ti, *nti;
1058	struct node_host	*h;
1059
1060	printf("table <%s>", name);
1061	if (flags & PFR_TFLAG_CONST)
1062		printf(" const");
1063	if (flags & PFR_TFLAG_PERSIST)
1064		printf(" persist");
1065	if (flags & PFR_TFLAG_COUNTERS)
1066		printf(" counters");
1067	SIMPLEQ_FOREACH(ti, nodes, entries) {
1068		if (ti->file) {
1069			printf(" file \"%s\"", ti->file);
1070			continue;
1071		}
1072		printf(" {");
1073		for (;;) {
1074			for (h = ti->host; h != NULL; h = h->next) {
1075				printf(h->not ? " !" : " ");
1076				print_addr(&h->addr, h->af, 0);
1077			}
1078			nti = SIMPLEQ_NEXT(ti, entries);
1079			if (nti != NULL && nti->file == NULL)
1080				ti = nti;	/* merge lists */
1081			else
1082				break;
1083		}
1084		printf(" }");
1085	}
1086	if (addrs && SIMPLEQ_EMPTY(nodes))
1087		printf(" { }");
1088	printf("\n");
1089}
1090
1091int
1092parse_flags(char *s)
1093{
1094	char		*p, *q;
1095	u_int8_t	 f = 0;
1096
1097	for (p = s; *p; p++) {
1098		if ((q = strchr(tcpflags, *p)) == NULL)
1099			return -1;
1100		else
1101			f |= 1 << (q - tcpflags);
1102	}
1103	return (f ? f : PF_TH_ALL);
1104}
1105
1106void
1107set_ipmask(struct node_host *h, u_int8_t b)
1108{
1109	struct pf_addr	*m, *n;
1110	int		 i, j = 0;
1111
1112	m = &h->addr.v.a.mask;
1113	memset(m, 0, sizeof(*m));
1114
1115	while (b >= 32) {
1116		m->addr32[j++] = 0xffffffff;
1117		b -= 32;
1118	}
1119	for (i = 31; i > 31-b; --i)
1120		m->addr32[j] |= (1 << i);
1121	if (b)
1122		m->addr32[j] = htonl(m->addr32[j]);
1123
1124	/* Mask off bits of the address that will never be used. */
1125	n = &h->addr.v.a.addr;
1126	if (h->addr.type == PF_ADDR_ADDRMASK)
1127		for (i = 0; i < 4; i++)
1128			n->addr32[i] = n->addr32[i] & m->addr32[i];
1129}
1130
1131int
1132check_netmask(struct node_host *h, sa_family_t af)
1133{
1134	struct node_host	*n = NULL;
1135	struct pf_addr	*m;
1136
1137	for (n = h; n != NULL; n = n->next) {
1138		if (h->addr.type == PF_ADDR_TABLE)
1139			continue;
1140		m = &h->addr.v.a.mask;
1141		/* fix up netmask for dynaddr */
1142		if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1143		    unmask(m, AF_INET6) > 32)
1144			set_ipmask(n, 32);
1145		/* netmasks > 32 bit are invalid on v4 */
1146		if (af == AF_INET &&
1147		    (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1148			fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1149			    unmask(m, AF_INET6));
1150			return (1);
1151		}
1152	}
1153	return (0);
1154}
1155
1156/* interface lookup routines */
1157
1158struct node_host	*iftab;
1159
1160void
1161ifa_load(void)
1162{
1163	struct ifaddrs		*ifap, *ifa;
1164	struct node_host	*n = NULL, *h = NULL;
1165
1166	if (getifaddrs(&ifap) < 0)
1167		err(1, "getifaddrs");
1168
1169	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1170		if (!(ifa->ifa_addr->sa_family == AF_INET ||
1171		    ifa->ifa_addr->sa_family == AF_INET6 ||
1172		    ifa->ifa_addr->sa_family == AF_LINK))
1173				continue;
1174		n = calloc(1, sizeof(struct node_host));
1175		if (n == NULL)
1176			err(1, "address: calloc");
1177		n->af = ifa->ifa_addr->sa_family;
1178		n->ifa_flags = ifa->ifa_flags;
1179#ifdef __KAME__
1180		if (n->af == AF_INET6 &&
1181		    IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1182		    ifa->ifa_addr)->sin6_addr) &&
1183		    ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1184		    0) {
1185			struct sockaddr_in6	*sin6;
1186
1187			sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1188			sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1189			    sin6->sin6_addr.s6_addr[3];
1190			sin6->sin6_addr.s6_addr[2] = 0;
1191			sin6->sin6_addr.s6_addr[3] = 0;
1192		}
1193#endif
1194		n->ifindex = 0;
1195		if (n->af == AF_INET) {
1196			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1197			    ifa->ifa_addr)->sin_addr.s_addr,
1198			    sizeof(struct in_addr));
1199			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1200			    ifa->ifa_netmask)->sin_addr.s_addr,
1201			    sizeof(struct in_addr));
1202			if (ifa->ifa_broadaddr != NULL)
1203				memcpy(&n->bcast, &((struct sockaddr_in *)
1204				    ifa->ifa_broadaddr)->sin_addr.s_addr,
1205				    sizeof(struct in_addr));
1206			if (ifa->ifa_dstaddr != NULL)
1207				memcpy(&n->peer, &((struct sockaddr_in *)
1208				    ifa->ifa_dstaddr)->sin_addr.s_addr,
1209				    sizeof(struct in_addr));
1210		} else if (n->af == AF_INET6) {
1211			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1212			    ifa->ifa_addr)->sin6_addr.s6_addr,
1213			    sizeof(struct in6_addr));
1214			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1215			    ifa->ifa_netmask)->sin6_addr.s6_addr,
1216			    sizeof(struct in6_addr));
1217			if (ifa->ifa_broadaddr != NULL)
1218				memcpy(&n->bcast, &((struct sockaddr_in6 *)
1219				    ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1220				    sizeof(struct in6_addr));
1221			if (ifa->ifa_dstaddr != NULL)
1222				 memcpy(&n->peer, &((struct sockaddr_in6 *)
1223				    ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1224				    sizeof(struct in6_addr));
1225			n->ifindex = ((struct sockaddr_in6 *)
1226			    ifa->ifa_addr)->sin6_scope_id;
1227		}
1228		if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1229			err(1, "ifa_load: strdup");
1230		n->next = NULL;
1231		n->tail = n;
1232		if (h == NULL)
1233			h = n;
1234		else {
1235			h->tail->next = n;
1236			h->tail = n;
1237		}
1238	}
1239
1240	iftab = h;
1241	freeifaddrs(ifap);
1242}
1243
1244int
1245get_socket_domain(void)
1246{
1247	int sdom;
1248
1249	sdom = AF_UNSPEC;
1250#ifdef WITH_INET6
1251	if (sdom == AF_UNSPEC && feature_present("inet6"))
1252		sdom = AF_INET6;
1253#endif
1254#ifdef WITH_INET
1255	if (sdom == AF_UNSPEC && feature_present("inet"))
1256		sdom = AF_INET;
1257#endif
1258	if (sdom == AF_UNSPEC)
1259		sdom = AF_LINK;
1260
1261	return (sdom);
1262}
1263
1264struct node_host *
1265ifa_exists(const char *ifa_name)
1266{
1267	struct node_host	*n;
1268	struct ifgroupreq	ifgr;
1269	int			s;
1270
1271	if (iftab == NULL)
1272		ifa_load();
1273
1274	/* check wether this is a group */
1275	if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1276		err(1, "socket");
1277	bzero(&ifgr, sizeof(ifgr));
1278	strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1279	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1280		/* fake a node_host */
1281		if ((n = calloc(1, sizeof(*n))) == NULL)
1282			err(1, "calloc");
1283		if ((n->ifname = strdup(ifa_name)) == NULL)
1284			err(1, "strdup");
1285		close(s);
1286		return (n);
1287	}
1288	close(s);
1289
1290	for (n = iftab; n; n = n->next) {
1291		if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1292			return (n);
1293	}
1294
1295	return (NULL);
1296}
1297
1298struct node_host *
1299ifa_grouplookup(const char *ifa_name, int flags)
1300{
1301	struct ifg_req		*ifg;
1302	struct ifgroupreq	 ifgr;
1303	int			 s, len;
1304	struct node_host	*n, *h = NULL;
1305
1306	if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1307		err(1, "socket");
1308	bzero(&ifgr, sizeof(ifgr));
1309	strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1310	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1311		close(s);
1312		return (NULL);
1313	}
1314
1315	len = ifgr.ifgr_len;
1316	if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1317		err(1, "calloc");
1318	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1319		err(1, "SIOCGIFGMEMB");
1320
1321	for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1322	    ifg++) {
1323		len -= sizeof(struct ifg_req);
1324		if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1325			continue;
1326		if (h == NULL)
1327			h = n;
1328		else {
1329			h->tail->next = n;
1330			h->tail = n->tail;
1331		}
1332	}
1333	free(ifgr.ifgr_groups);
1334	close(s);
1335
1336	return (h);
1337}
1338
1339struct node_host *
1340ifa_lookup(const char *ifa_name, int flags)
1341{
1342	struct node_host	*p = NULL, *h = NULL, *n = NULL;
1343	int			 got4 = 0, got6 = 0;
1344	const char		 *last_if = NULL;
1345
1346	if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1347		return (h);
1348
1349	if (!strncmp(ifa_name, "self", IFNAMSIZ))
1350		ifa_name = NULL;
1351
1352	if (iftab == NULL)
1353		ifa_load();
1354
1355	for (p = iftab; p; p = p->next) {
1356		if (ifa_skip_if(ifa_name, p))
1357			continue;
1358		if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1359			continue;
1360		if ((flags & PFI_AFLAG_BROADCAST) &&
1361		    !(p->ifa_flags & IFF_BROADCAST))
1362			continue;
1363		if ((flags & PFI_AFLAG_PEER) &&
1364		    !(p->ifa_flags & IFF_POINTOPOINT))
1365			continue;
1366		if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1367			continue;
1368		if (last_if == NULL || strcmp(last_if, p->ifname))
1369			got4 = got6 = 0;
1370		last_if = p->ifname;
1371		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1372			continue;
1373		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1374			continue;
1375		if (p->af == AF_INET)
1376			got4 = 1;
1377		else
1378			got6 = 1;
1379		n = calloc(1, sizeof(struct node_host));
1380		if (n == NULL)
1381			err(1, "address: calloc");
1382		n->af = p->af;
1383		if (flags & PFI_AFLAG_BROADCAST)
1384			memcpy(&n->addr.v.a.addr, &p->bcast,
1385			    sizeof(struct pf_addr));
1386		else if (flags & PFI_AFLAG_PEER)
1387			memcpy(&n->addr.v.a.addr, &p->peer,
1388			    sizeof(struct pf_addr));
1389		else
1390			memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1391			    sizeof(struct pf_addr));
1392		if (flags & PFI_AFLAG_NETWORK)
1393			set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1394		else {
1395			if (n->af == AF_INET) {
1396				if (p->ifa_flags & IFF_LOOPBACK &&
1397				    p->ifa_flags & IFF_LINK1)
1398					memcpy(&n->addr.v.a.mask,
1399					    &p->addr.v.a.mask,
1400					    sizeof(struct pf_addr));
1401				else
1402					set_ipmask(n, 32);
1403			} else
1404				set_ipmask(n, 128);
1405		}
1406		n->ifindex = p->ifindex;
1407		n->ifname = strdup(p->ifname);
1408
1409		n->next = NULL;
1410		n->tail = n;
1411		if (h == NULL)
1412			h = n;
1413		else {
1414			h->tail->next = n;
1415			h->tail = n;
1416		}
1417	}
1418	return (h);
1419}
1420
1421int
1422ifa_skip_if(const char *filter, struct node_host *p)
1423{
1424	int	n;
1425
1426	if (p->af != AF_INET && p->af != AF_INET6)
1427		return (1);
1428	if (filter == NULL || !*filter)
1429		return (0);
1430	if (!strcmp(p->ifname, filter))
1431		return (0);	/* exact match */
1432	n = strlen(filter);
1433	if (n < 1 || n >= IFNAMSIZ)
1434		return (1);	/* sanity check */
1435	if (filter[n-1] >= '0' && filter[n-1] <= '9')
1436		return (1);	/* only do exact match in that case */
1437	if (strncmp(p->ifname, filter, n))
1438		return (1);	/* prefix doesn't match */
1439	return (p->ifname[n] < '0' || p->ifname[n] > '9');
1440}
1441
1442
1443struct node_host *
1444host(const char *s)
1445{
1446	struct node_host	*h = NULL;
1447	int			 mask, v4mask, v6mask, cont = 1;
1448	char			*p, *q, *ps;
1449
1450	if ((p = strrchr(s, '/')) != NULL) {
1451		mask = strtol(p+1, &q, 0);
1452		if (!q || *q || mask > 128 || q == (p+1)) {
1453			fprintf(stderr, "invalid netmask '%s'\n", p);
1454			return (NULL);
1455		}
1456		if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1457			err(1, "host: malloc");
1458		strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1459		v4mask = v6mask = mask;
1460	} else {
1461		if ((ps = strdup(s)) == NULL)
1462			err(1, "host: strdup");
1463		v4mask = 32;
1464		v6mask = 128;
1465		mask = -1;
1466	}
1467
1468	/* IPv4 address? */
1469	if (cont && (h = host_v4(s, mask)) != NULL)
1470		cont = 0;
1471
1472	/* IPv6 address? */
1473	if (cont && (h = host_v6(ps, v6mask)) != NULL)
1474		cont = 0;
1475
1476	/* interface with this name exists? */
1477	/* expensive with thousands of interfaces - prioritze IPv4/6 check */
1478	if (cont && (h = host_if(ps, mask)) != NULL)
1479		cont = 0;
1480
1481	/* dns lookup */
1482	if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1483		cont = 0;
1484	free(ps);
1485
1486	if (h == NULL || cont == 1) {
1487		fprintf(stderr, "no IP address found for %s\n", s);
1488		return (NULL);
1489	}
1490	return (h);
1491}
1492
1493struct node_host *
1494host_if(const char *s, int mask)
1495{
1496	struct node_host	*n, *h = NULL;
1497	char			*p, *ps;
1498	int			 flags = 0;
1499
1500	if ((ps = strdup(s)) == NULL)
1501		err(1, "host_if: strdup");
1502	while ((p = strrchr(ps, ':')) != NULL) {
1503		if (!strcmp(p+1, "network"))
1504			flags |= PFI_AFLAG_NETWORK;
1505		else if (!strcmp(p+1, "broadcast"))
1506			flags |= PFI_AFLAG_BROADCAST;
1507		else if (!strcmp(p+1, "peer"))
1508			flags |= PFI_AFLAG_PEER;
1509		else if (!strcmp(p+1, "0"))
1510			flags |= PFI_AFLAG_NOALIAS;
1511		else {
1512			free(ps);
1513			return (NULL);
1514		}
1515		*p = '\0';
1516	}
1517	if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1518		fprintf(stderr, "illegal combination of interface modifiers\n");
1519		free(ps);
1520		return (NULL);
1521	}
1522	if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1523		fprintf(stderr, "network or broadcast lookup, but "
1524		    "extra netmask given\n");
1525		free(ps);
1526		return (NULL);
1527	}
1528	if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1529		/* interface with this name exists */
1530		h = ifa_lookup(ps, flags);
1531		for (n = h; n != NULL && mask > -1; n = n->next)
1532			set_ipmask(n, mask);
1533	}
1534
1535	free(ps);
1536	return (h);
1537}
1538
1539struct node_host *
1540host_v4(const char *s, int mask)
1541{
1542	struct node_host	*h = NULL;
1543	struct in_addr		 ina;
1544	int			 bits = 32;
1545
1546	memset(&ina, 0, sizeof(struct in_addr));
1547	if (strrchr(s, '/') != NULL) {
1548		if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1549			return (NULL);
1550	} else {
1551		if (inet_pton(AF_INET, s, &ina) != 1)
1552			return (NULL);
1553	}
1554
1555	h = calloc(1, sizeof(struct node_host));
1556	if (h == NULL)
1557		err(1, "address: calloc");
1558	h->ifname = NULL;
1559	h->af = AF_INET;
1560	h->addr.v.a.addr.addr32[0] = ina.s_addr;
1561	set_ipmask(h, bits);
1562	h->next = NULL;
1563	h->tail = h;
1564
1565	return (h);
1566}
1567
1568struct node_host *
1569host_v6(const char *s, int mask)
1570{
1571	struct addrinfo		 hints, *res;
1572	struct node_host	*h = NULL;
1573
1574	memset(&hints, 0, sizeof(hints));
1575	hints.ai_family = AF_INET6;
1576	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1577	hints.ai_flags = AI_NUMERICHOST;
1578	if (getaddrinfo(s, "0", &hints, &res) == 0) {
1579		h = calloc(1, sizeof(struct node_host));
1580		if (h == NULL)
1581			err(1, "address: calloc");
1582		h->ifname = NULL;
1583		h->af = AF_INET6;
1584		memcpy(&h->addr.v.a.addr,
1585		    &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1586		    sizeof(h->addr.v.a.addr));
1587		h->ifindex =
1588		    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1589		set_ipmask(h, mask);
1590		freeaddrinfo(res);
1591		h->next = NULL;
1592		h->tail = h;
1593	}
1594
1595	return (h);
1596}
1597
1598struct node_host *
1599host_dns(const char *s, int v4mask, int v6mask)
1600{
1601	struct addrinfo		 hints, *res0, *res;
1602	struct node_host	*n, *h = NULL;
1603	int			 error, noalias = 0;
1604	int			 got4 = 0, got6 = 0;
1605	char			*p, *ps;
1606
1607	if ((ps = strdup(s)) == NULL)
1608		err(1, "host_dns: strdup");
1609	if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1610		noalias = 1;
1611		*p = '\0';
1612	}
1613	memset(&hints, 0, sizeof(hints));
1614	hints.ai_family = PF_UNSPEC;
1615	hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1616	error = getaddrinfo(ps, NULL, &hints, &res0);
1617	if (error) {
1618		free(ps);
1619		return (h);
1620	}
1621
1622	for (res = res0; res; res = res->ai_next) {
1623		if (res->ai_family != AF_INET &&
1624		    res->ai_family != AF_INET6)
1625			continue;
1626		if (noalias) {
1627			if (res->ai_family == AF_INET) {
1628				if (got4)
1629					continue;
1630				got4 = 1;
1631			} else {
1632				if (got6)
1633					continue;
1634				got6 = 1;
1635			}
1636		}
1637		n = calloc(1, sizeof(struct node_host));
1638		if (n == NULL)
1639			err(1, "host_dns: calloc");
1640		n->ifname = NULL;
1641		n->af = res->ai_family;
1642		if (res->ai_family == AF_INET) {
1643			memcpy(&n->addr.v.a.addr,
1644			    &((struct sockaddr_in *)
1645			    res->ai_addr)->sin_addr.s_addr,
1646			    sizeof(struct in_addr));
1647			set_ipmask(n, v4mask);
1648		} else {
1649			memcpy(&n->addr.v.a.addr,
1650			    &((struct sockaddr_in6 *)
1651			    res->ai_addr)->sin6_addr.s6_addr,
1652			    sizeof(struct in6_addr));
1653			n->ifindex =
1654			    ((struct sockaddr_in6 *)
1655			    res->ai_addr)->sin6_scope_id;
1656			set_ipmask(n, v6mask);
1657		}
1658		n->next = NULL;
1659		n->tail = n;
1660		if (h == NULL)
1661			h = n;
1662		else {
1663			h->tail->next = n;
1664			h->tail = n;
1665		}
1666	}
1667	freeaddrinfo(res0);
1668	free(ps);
1669
1670	return (h);
1671}
1672
1673/*
1674 * convert a hostname to a list of addresses and put them in the given buffer.
1675 * test:
1676 *	if set to 1, only simple addresses are accepted (no netblock, no "!").
1677 */
1678int
1679append_addr(struct pfr_buffer *b, char *s, int test)
1680{
1681	char			 *r;
1682	struct node_host	*h, *n;
1683	int			 rv, not = 0;
1684
1685	for (r = s; *r == '!'; r++)
1686		not = !not;
1687	if ((n = host(r)) == NULL) {
1688		errno = 0;
1689		return (-1);
1690	}
1691	rv = append_addr_host(b, n, test, not);
1692	do {
1693		h = n;
1694		n = n->next;
1695		free(h);
1696	} while (n != NULL);
1697	return (rv);
1698}
1699
1700/*
1701 * same as previous function, but with a pre-parsed input and the ability
1702 * to "negate" the result. Does not free the node_host list.
1703 * not:
1704 *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1705 */
1706int
1707append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1708{
1709	int			 bits;
1710	struct pfr_addr		 addr;
1711
1712	do {
1713		bzero(&addr, sizeof(addr));
1714		addr.pfra_not = n->not ^ not;
1715		addr.pfra_af = n->af;
1716		addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1717		switch (n->af) {
1718		case AF_INET:
1719			addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1720			bits = 32;
1721			break;
1722		case AF_INET6:
1723			memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1724			    sizeof(struct in6_addr));
1725			bits = 128;
1726			break;
1727		default:
1728			errno = EINVAL;
1729			return (-1);
1730		}
1731		if ((test && (not || addr.pfra_net != bits)) ||
1732		    addr.pfra_net > bits) {
1733			errno = EINVAL;
1734			return (-1);
1735		}
1736		if (pfr_buf_add(b, &addr))
1737			return (-1);
1738	} while ((n = n->next) != NULL);
1739
1740	return (0);
1741}
1742
1743int
1744pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1745{
1746	struct pfioc_trans_e trans;
1747
1748	bzero(&trans, sizeof(trans));
1749	trans.rs_num = rs_num;
1750	if (strlcpy(trans.anchor, anchor,
1751	    sizeof(trans.anchor)) >= sizeof(trans.anchor))
1752		errx(1, "pfctl_add_trans: strlcpy");
1753
1754	return pfr_buf_add(buf, &trans);
1755}
1756
1757u_int32_t
1758pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1759{
1760	struct pfioc_trans_e *p;
1761
1762	PFRB_FOREACH(p, buf)
1763		if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1764			return (p->ticket);
1765	errx(1, "pfctl_get_ticket: assertion failed");
1766}
1767
1768int
1769pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1770{
1771	struct pfioc_trans trans;
1772
1773	bzero(&trans, sizeof(trans));
1774	trans.size = buf->pfrb_size - from;
1775	trans.esize = sizeof(struct pfioc_trans_e);
1776	trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1777	return ioctl(dev, cmd, &trans);
1778}
1779