1/*	$OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
2
3/*
4 * Copyright (c) 2001 Daniel Hartmeier
5 * Copyright (c) 2002,2003 Henning Brauer
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 *    - Redistributions of source code must retain the above copyright
13 *      notice, this list of conditions and the following disclaimer.
14 *    - Redistributions in binary form must reproduce the above
15 *      copyright notice, this list of conditions and the following
16 *      disclaimer in the documentation and/or other materials provided
17 *      with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37#include <sys/types.h>
38#include <sys/ioctl.h>
39#include <sys/socket.h>
40#include <sys/param.h>
41#include <sys/proc.h>
42#include <net/if.h>
43#include <netinet/in.h>
44#include <netinet/in_systm.h>
45#include <netinet/ip.h>
46#include <netinet/ip_icmp.h>
47#include <netinet/icmp6.h>
48#include <net/pfvar.h>
49#include <arpa/inet.h>
50
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <ctype.h>
55#include <netdb.h>
56#include <stdarg.h>
57#include <errno.h>
58#include <err.h>
59#include <ifaddrs.h>
60#include <unistd.h>
61
62#include "pfctl_parser.h"
63#include "pfctl.h"
64
65void		 print_op (u_int8_t, const char *, const char *);
66void		 print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
67void		 print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
68void		 print_flags (u_int8_t);
69void		 print_fromto(struct pf_rule_addr *, pf_osfp_t,
70		    struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
71int		 ifa_skip_if(const char *filter, struct node_host *p);
72
73struct node_host	*ifa_grouplookup(const char *, int);
74struct node_host	*host_if(const char *, int);
75struct node_host	*host_v4(const char *, int);
76struct node_host	*host_v6(const char *, int);
77struct node_host	*host_dns(const char *, int, int);
78
79const char *tcpflags = "FSRPAUEW";
80
81static const struct icmptypeent icmp_type[] = {
82	{ "echoreq",	ICMP_ECHO },
83	{ "echorep",	ICMP_ECHOREPLY },
84	{ "unreach",	ICMP_UNREACH },
85	{ "squench",	ICMP_SOURCEQUENCH },
86	{ "redir",	ICMP_REDIRECT },
87	{ "althost",	ICMP_ALTHOSTADDR },
88	{ "routeradv",	ICMP_ROUTERADVERT },
89	{ "routersol",	ICMP_ROUTERSOLICIT },
90	{ "timex",	ICMP_TIMXCEED },
91	{ "paramprob",	ICMP_PARAMPROB },
92	{ "timereq",	ICMP_TSTAMP },
93	{ "timerep",	ICMP_TSTAMPREPLY },
94	{ "inforeq",	ICMP_IREQ },
95	{ "inforep",	ICMP_IREQREPLY },
96	{ "maskreq",	ICMP_MASKREQ },
97	{ "maskrep",	ICMP_MASKREPLY },
98	{ "trace",	ICMP_TRACEROUTE },
99	{ "dataconv",	ICMP_DATACONVERR },
100	{ "mobredir",	ICMP_MOBILE_REDIRECT },
101	{ "ipv6-where",	ICMP_IPV6_WHEREAREYOU },
102	{ "ipv6-here",	ICMP_IPV6_IAMHERE },
103	{ "mobregreq",	ICMP_MOBILE_REGREQUEST },
104	{ "mobregrep",	ICMP_MOBILE_REGREPLY },
105	{ "skip",	ICMP_SKIP },
106	{ "photuris",	ICMP_PHOTURIS }
107};
108
109static const struct icmptypeent icmp6_type[] = {
110	{ "unreach",	ICMP6_DST_UNREACH },
111	{ "toobig",	ICMP6_PACKET_TOO_BIG },
112	{ "timex",	ICMP6_TIME_EXCEEDED },
113	{ "paramprob",	ICMP6_PARAM_PROB },
114	{ "echoreq",	ICMP6_ECHO_REQUEST },
115	{ "echorep",	ICMP6_ECHO_REPLY },
116	{ "groupqry",	ICMP6_MEMBERSHIP_QUERY },
117	{ "listqry",	MLD_LISTENER_QUERY },
118	{ "grouprep",	ICMP6_MEMBERSHIP_REPORT },
119	{ "listenrep",	MLD_LISTENER_REPORT },
120	{ "groupterm",	ICMP6_MEMBERSHIP_REDUCTION },
121	{ "listendone", MLD_LISTENER_DONE },
122	{ "routersol",	ND_ROUTER_SOLICIT },
123	{ "routeradv",	ND_ROUTER_ADVERT },
124	{ "neighbrsol", ND_NEIGHBOR_SOLICIT },
125	{ "neighbradv", ND_NEIGHBOR_ADVERT },
126	{ "redir",	ND_REDIRECT },
127	{ "routrrenum", ICMP6_ROUTER_RENUMBERING },
128	{ "wrureq",	ICMP6_WRUREQUEST },
129	{ "wrurep",	ICMP6_WRUREPLY },
130	{ "fqdnreq",	ICMP6_FQDN_QUERY },
131	{ "fqdnrep",	ICMP6_FQDN_REPLY },
132	{ "niqry",	ICMP6_NI_QUERY },
133	{ "nirep",	ICMP6_NI_REPLY },
134	{ "mtraceresp",	MLD_MTRACE_RESP },
135	{ "mtrace",	MLD_MTRACE }
136};
137
138static const struct icmpcodeent icmp_code[] = {
139	{ "net-unr",		ICMP_UNREACH,	ICMP_UNREACH_NET },
140	{ "host-unr",		ICMP_UNREACH,	ICMP_UNREACH_HOST },
141	{ "proto-unr",		ICMP_UNREACH,	ICMP_UNREACH_PROTOCOL },
142	{ "port-unr",		ICMP_UNREACH,	ICMP_UNREACH_PORT },
143	{ "needfrag",		ICMP_UNREACH,	ICMP_UNREACH_NEEDFRAG },
144	{ "srcfail",		ICMP_UNREACH,	ICMP_UNREACH_SRCFAIL },
145	{ "net-unk",		ICMP_UNREACH,	ICMP_UNREACH_NET_UNKNOWN },
146	{ "host-unk",		ICMP_UNREACH,	ICMP_UNREACH_HOST_UNKNOWN },
147	{ "isolate",		ICMP_UNREACH,	ICMP_UNREACH_ISOLATED },
148	{ "net-prohib",		ICMP_UNREACH,	ICMP_UNREACH_NET_PROHIB },
149	{ "host-prohib",	ICMP_UNREACH,	ICMP_UNREACH_HOST_PROHIB },
150	{ "net-tos",		ICMP_UNREACH,	ICMP_UNREACH_TOSNET },
151	{ "host-tos",		ICMP_UNREACH,	ICMP_UNREACH_TOSHOST },
152	{ "filter-prohib",	ICMP_UNREACH,	ICMP_UNREACH_FILTER_PROHIB },
153	{ "host-preced",	ICMP_UNREACH,	ICMP_UNREACH_HOST_PRECEDENCE },
154	{ "cutoff-preced",	ICMP_UNREACH,	ICMP_UNREACH_PRECEDENCE_CUTOFF },
155	{ "redir-net",		ICMP_REDIRECT,	ICMP_REDIRECT_NET },
156	{ "redir-host",		ICMP_REDIRECT,	ICMP_REDIRECT_HOST },
157	{ "redir-tos-net",	ICMP_REDIRECT,	ICMP_REDIRECT_TOSNET },
158	{ "redir-tos-host",	ICMP_REDIRECT,	ICMP_REDIRECT_TOSHOST },
159	{ "normal-adv",		ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
160	{ "common-adv",		ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
161	{ "transit",		ICMP_TIMXCEED,	ICMP_TIMXCEED_INTRANS },
162	{ "reassemb",		ICMP_TIMXCEED,	ICMP_TIMXCEED_REASS },
163	{ "badhead",		ICMP_PARAMPROB,	ICMP_PARAMPROB_ERRATPTR },
164	{ "optmiss",		ICMP_PARAMPROB,	ICMP_PARAMPROB_OPTABSENT },
165	{ "badlen",		ICMP_PARAMPROB,	ICMP_PARAMPROB_LENGTH },
166	{ "unknown-ind",	ICMP_PHOTURIS,	ICMP_PHOTURIS_UNKNOWN_INDEX },
167	{ "auth-fail",		ICMP_PHOTURIS,	ICMP_PHOTURIS_AUTH_FAILED },
168	{ "decrypt-fail",	ICMP_PHOTURIS,	ICMP_PHOTURIS_DECRYPT_FAILED }
169};
170
171static const struct icmpcodeent icmp6_code[] = {
172	{ "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
173	{ "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
174	{ "notnbr-unr",	ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
175	{ "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
176	{ "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
177	{ "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
178	{ "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
179	{ "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
180	{ "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
181	{ "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
182	{ "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
183	{ "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
184};
185
186const struct pf_timeout pf_timeouts[] = {
187	{ "tcp.first",		PFTM_TCP_FIRST_PACKET },
188	{ "tcp.opening",	PFTM_TCP_OPENING },
189	{ "tcp.established",	PFTM_TCP_ESTABLISHED },
190	{ "tcp.closing",	PFTM_TCP_CLOSING },
191	{ "tcp.finwait",	PFTM_TCP_FIN_WAIT },
192	{ "tcp.closed",		PFTM_TCP_CLOSED },
193	{ "tcp.tsdiff",		PFTM_TS_DIFF },
194	{ "udp.first",		PFTM_UDP_FIRST_PACKET },
195	{ "udp.single",		PFTM_UDP_SINGLE },
196	{ "udp.multiple",	PFTM_UDP_MULTIPLE },
197	{ "icmp.first",		PFTM_ICMP_FIRST_PACKET },
198	{ "icmp.error",		PFTM_ICMP_ERROR_REPLY },
199	{ "other.first",	PFTM_OTHER_FIRST_PACKET },
200	{ "other.single",	PFTM_OTHER_SINGLE },
201	{ "other.multiple",	PFTM_OTHER_MULTIPLE },
202	{ "frag",		PFTM_FRAG },
203	{ "interval",		PFTM_INTERVAL },
204	{ "adaptive.start",	PFTM_ADAPTIVE_START },
205	{ "adaptive.end",	PFTM_ADAPTIVE_END },
206	{ "src.track",		PFTM_SRC_NODE },
207	{ NULL,			0 }
208};
209
210const struct icmptypeent *
211geticmptypebynumber(u_int8_t type, sa_family_t af)
212{
213	unsigned int	i;
214
215	if (af != AF_INET6) {
216		for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
217		    i++) {
218			if (type == icmp_type[i].type)
219				return (&icmp_type[i]);
220		}
221	} else {
222		for (i=0; i < (sizeof (icmp6_type) /
223		    sizeof(icmp6_type[0])); 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 < (sizeof (icmp_type) / sizeof(icmp_type[0]));
238		    i++) {
239			if (!strcmp(w, icmp_type[i].name))
240				return (&icmp_type[i]);
241		}
242	} else {
243		for (i=0; i < (sizeof (icmp6_type) /
244		    sizeof(icmp6_type[0])); i++) {
245			if (!strcmp(w, icmp6_type[i].name))
246				return (&icmp6_type[i]);
247		}
248	}
249	return (NULL);
250}
251
252const struct icmpcodeent *
253geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
254{
255	unsigned int	i;
256
257	if (af != AF_INET6) {
258		for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
259		    i++) {
260			if (type == icmp_code[i].type &&
261			    code == icmp_code[i].code)
262				return (&icmp_code[i]);
263		}
264	} else {
265		for (i=0; i < (sizeof (icmp6_code) /
266		    sizeof(icmp6_code[0])); i++) {
267			if (type == icmp6_code[i].type &&
268			    code == icmp6_code[i].code)
269				return (&icmp6_code[i]);
270		}
271	}
272	return (NULL);
273}
274
275const struct icmpcodeent *
276geticmpcodebyname(u_long type, char *w, sa_family_t af)
277{
278	unsigned int	i;
279
280	if (af != AF_INET6) {
281		for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
282		    i++) {
283			if (type == icmp_code[i].type &&
284			    !strcmp(w, icmp_code[i].name))
285				return (&icmp_code[i]);
286		}
287	} else {
288		for (i=0; i < (sizeof (icmp6_code) /
289		    sizeof(icmp6_code[0])); i++) {
290			if (type == icmp6_code[i].type &&
291			    !strcmp(w, icmp6_code[i].name))
292				return (&icmp6_code[i]);
293		}
294	}
295	return (NULL);
296}
297
298void
299print_op(u_int8_t op, const char *a1, const char *a2)
300{
301	if (op == PF_OP_IRG)
302		printf(" %s >< %s", a1, a2);
303	else if (op == PF_OP_XRG)
304		printf(" %s <> %s", a1, a2);
305	else if (op == PF_OP_EQ)
306		printf(" = %s", a1);
307	else if (op == PF_OP_NE)
308		printf(" != %s", a1);
309	else if (op == PF_OP_LT)
310		printf(" < %s", a1);
311	else if (op == PF_OP_LE)
312		printf(" <= %s", a1);
313	else if (op == PF_OP_GT)
314		printf(" > %s", a1);
315	else if (op == PF_OP_GE)
316		printf(" >= %s", a1);
317	else if (op == PF_OP_RRG)
318		printf(" %s:%s", a1, a2);
319}
320
321void
322print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
323{
324	char		 a1[6], a2[6];
325	struct servent	*s;
326
327	if (!numeric)
328		s = getservbyport(p1, proto);
329	else
330		s = NULL;
331	p1 = ntohs(p1);
332	p2 = ntohs(p2);
333	snprintf(a1, sizeof(a1), "%u", p1);
334	snprintf(a2, sizeof(a2), "%u", p2);
335	printf(" port");
336	if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
337		print_op(op, s->s_name, a2);
338	else
339		print_op(op, a1, a2);
340}
341
342void
343print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
344{
345	char	a1[11], a2[11];
346
347	snprintf(a1, sizeof(a1), "%u", u1);
348	snprintf(a2, sizeof(a2), "%u", u2);
349	printf(" %s", t);
350	if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
351		print_op(op, "unknown", a2);
352	else
353		print_op(op, a1, a2);
354}
355
356void
357print_flags(u_int8_t f)
358{
359	int	i;
360
361	for (i = 0; tcpflags[i]; ++i)
362		if (f & (1 << i))
363			printf("%c", tcpflags[i]);
364}
365
366void
367print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
368    sa_family_t af, u_int8_t proto, int verbose, int numeric)
369{
370	char buf[PF_OSFP_LEN*3];
371	if (src->addr.type == PF_ADDR_ADDRMASK &&
372	    dst->addr.type == PF_ADDR_ADDRMASK &&
373	    PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
374	    PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
375	    PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
376	    PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
377	    !src->neg && !dst->neg &&
378	    !src->port_op && !dst->port_op &&
379	    osfp == PF_OSFP_ANY)
380		printf(" all");
381	else {
382		printf(" from ");
383		if (src->neg)
384			printf("! ");
385		print_addr(&src->addr, af, verbose);
386		if (src->port_op)
387			print_port(src->port_op, src->port[0],
388			    src->port[1],
389			    proto == IPPROTO_TCP ? "tcp" : "udp",
390			    numeric);
391		if (osfp != PF_OSFP_ANY)
392			printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
393			    sizeof(buf)));
394
395		printf(" to ");
396		if (dst->neg)
397			printf("! ");
398		print_addr(&dst->addr, af, verbose);
399		if (dst->port_op)
400			print_port(dst->port_op, dst->port[0],
401			    dst->port[1],
402			    proto == IPPROTO_TCP ? "tcp" : "udp",
403			    numeric);
404	}
405}
406
407void
408print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
409    sa_family_t af, int id)
410{
411	struct pf_pooladdr	*pooladdr;
412
413	if ((TAILQ_FIRST(&pool->list) != NULL) &&
414	    TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
415		printf("{ ");
416	TAILQ_FOREACH(pooladdr, &pool->list, entries){
417		switch (id) {
418		case PF_NAT:
419		case PF_RDR:
420		case PF_BINAT:
421			print_addr(&pooladdr->addr, af, 0);
422			break;
423		case PF_PASS:
424			if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
425				printf("%s", pooladdr->ifname);
426			else {
427				printf("(%s ", pooladdr->ifname);
428				print_addr(&pooladdr->addr, af, 0);
429				printf(")");
430			}
431			break;
432		default:
433			break;
434		}
435		if (TAILQ_NEXT(pooladdr, entries) != NULL)
436			printf(", ");
437		else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
438			printf(" }");
439	}
440	switch (id) {
441	case PF_NAT:
442		if ((p1 != PF_NAT_PROXY_PORT_LOW ||
443		    p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
444			if (p1 == p2)
445				printf(" port %u", p1);
446			else
447				printf(" port %u:%u", p1, p2);
448		}
449		break;
450	case PF_RDR:
451		if (p1) {
452			printf(" port %u", p1);
453			if (p2 && (p2 != p1))
454				printf(":%u", p2);
455		}
456		break;
457	default:
458		break;
459	}
460	switch (pool->opts & PF_POOL_TYPEMASK) {
461	case PF_POOL_NONE:
462		break;
463	case PF_POOL_BITMASK:
464		printf(" bitmask");
465		break;
466	case PF_POOL_RANDOM:
467		printf(" random");
468		break;
469	case PF_POOL_SRCHASH:
470		printf(" source-hash 0x%08x%08x%08x%08x",
471		    pool->key.key32[0], pool->key.key32[1],
472		    pool->key.key32[2], pool->key.key32[3]);
473		break;
474	case PF_POOL_ROUNDROBIN:
475		printf(" round-robin");
476		break;
477	}
478	if (pool->opts & PF_POOL_STICKYADDR)
479		printf(" sticky-address");
480	if (id == PF_NAT && p1 == 0 && p2 == 0)
481		printf(" static-port");
482}
483
484const char	*pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
485const char	*pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
486const char	*pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
487const char	*pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
488
489void
490print_status(struct pf_status *s, int opts)
491{
492	char			statline[80], *running;
493	time_t			runtime;
494	int			i;
495	char			buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
496	static const char	hex[] = "0123456789abcdef";
497
498	runtime = time(NULL) - s->since;
499	running = s->running ? "Enabled" : "Disabled";
500
501	if (s->since) {
502		unsigned int	sec, min, hrs, day = runtime;
503
504		sec = day % 60;
505		day /= 60;
506		min = day % 60;
507		day /= 60;
508		hrs = day % 24;
509		day /= 24;
510		snprintf(statline, sizeof(statline),
511		    "Status: %s for %u days %.2u:%.2u:%.2u",
512		    running, day, hrs, min, sec);
513	} else
514		snprintf(statline, sizeof(statline), "Status: %s", running);
515	printf("%-44s", statline);
516	switch (s->debug) {
517	case PF_DEBUG_NONE:
518		printf("%15s\n\n", "Debug: None");
519		break;
520	case PF_DEBUG_URGENT:
521		printf("%15s\n\n", "Debug: Urgent");
522		break;
523	case PF_DEBUG_MISC:
524		printf("%15s\n\n", "Debug: Misc");
525		break;
526	case PF_DEBUG_NOISY:
527		printf("%15s\n\n", "Debug: Loud");
528		break;
529	}
530
531	if (opts & PF_OPT_VERBOSE) {
532		printf("Hostid:   0x%08x\n", ntohl(s->hostid));
533
534		for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
535			buf[i + i] = hex[s->pf_chksum[i] >> 4];
536			buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
537		}
538		buf[i + i] = '\0';
539		printf("Checksum: 0x%s\n\n", buf);
540	}
541
542	if (s->ifname[0] != 0) {
543		printf("Interface Stats for %-16s %5s %16s\n",
544		    s->ifname, "IPv4", "IPv6");
545		printf("  %-25s %14llu %16llu\n", "Bytes In",
546		    (unsigned long long)s->bcounters[0][0],
547		    (unsigned long long)s->bcounters[1][0]);
548		printf("  %-25s %14llu %16llu\n", "Bytes Out",
549		    (unsigned long long)s->bcounters[0][1],
550		    (unsigned long long)s->bcounters[1][1]);
551		printf("  Packets In\n");
552		printf("    %-23s %14llu %16llu\n", "Passed",
553		    (unsigned long long)s->pcounters[0][0][PF_PASS],
554		    (unsigned long long)s->pcounters[1][0][PF_PASS]);
555		printf("    %-23s %14llu %16llu\n", "Blocked",
556		    (unsigned long long)s->pcounters[0][0][PF_DROP],
557		    (unsigned long long)s->pcounters[1][0][PF_DROP]);
558		printf("  Packets Out\n");
559		printf("    %-23s %14llu %16llu\n", "Passed",
560		    (unsigned long long)s->pcounters[0][1][PF_PASS],
561		    (unsigned long long)s->pcounters[1][1][PF_PASS]);
562		printf("    %-23s %14llu %16llu\n\n", "Blocked",
563		    (unsigned long long)s->pcounters[0][1][PF_DROP],
564		    (unsigned long long)s->pcounters[1][1][PF_DROP]);
565	}
566	printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
567	printf("  %-25s %14u %14s\n", "current entries", s->states, "");
568	for (i = 0; i < FCNT_MAX; i++) {
569		printf("  %-25s %14llu ", pf_fcounters[i],
570			    (unsigned long long)s->fcounters[i]);
571		if (runtime > 0)
572			printf("%14.1f/s\n",
573			    (double)s->fcounters[i] / (double)runtime);
574		else
575			printf("%14s\n", "");
576	}
577	if (opts & PF_OPT_VERBOSE) {
578		printf("Source Tracking Table\n");
579		printf("  %-25s %14u %14s\n", "current entries",
580		    s->src_nodes, "");
581		for (i = 0; i < SCNT_MAX; i++) {
582			printf("  %-25s %14lld ", pf_scounters[i],
583#ifdef __FreeBSD__
584				    (long long)s->scounters[i]);
585#else
586				    s->scounters[i]);
587#endif
588			if (runtime > 0)
589				printf("%14.1f/s\n",
590				    (double)s->scounters[i] / (double)runtime);
591			else
592				printf("%14s\n", "");
593		}
594	}
595	printf("Counters\n");
596	for (i = 0; i < PFRES_MAX; i++) {
597		printf("  %-25s %14llu ", pf_reasons[i],
598		    (unsigned long long)s->counters[i]);
599		if (runtime > 0)
600			printf("%14.1f/s\n",
601			    (double)s->counters[i] / (double)runtime);
602		else
603			printf("%14s\n", "");
604	}
605	if (opts & PF_OPT_VERBOSE) {
606		printf("Limit Counters\n");
607		for (i = 0; i < LCNT_MAX; i++) {
608			printf("  %-25s %14lld ", pf_lcounters[i],
609#ifdef __FreeBSD__
610				    (unsigned long long)s->lcounters[i]);
611#else
612				    s->lcounters[i]);
613#endif
614			if (runtime > 0)
615				printf("%14.1f/s\n",
616				    (double)s->lcounters[i] / (double)runtime);
617			else
618				printf("%14s\n", "");
619		}
620	}
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->keep_state && r->action == PF_PASS && !anchor_call[0])
853		printf(" no state");
854	else if (r->keep_state == PF_STATE_NORMAL)
855		printf(" keep state");
856	else if (r->keep_state == PF_STATE_MODULATE)
857		printf(" modulate state");
858	else if (r->keep_state == PF_STATE_SYNPROXY)
859		printf(" synproxy state");
860	if (r->prob) {
861		char	buf[20];
862
863		snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
864		for (i = strlen(buf)-1; i > 0; i--) {
865			if (buf[i] == '0')
866				buf[i] = '\0';
867			else {
868				if (buf[i] == '.')
869					buf[i] = '\0';
870				break;
871			}
872		}
873		printf(" probability %s%%", buf);
874	}
875	opts = 0;
876	if (r->max_states || r->max_src_nodes || r->max_src_states)
877		opts = 1;
878	if (r->rule_flag & PFRULE_NOSYNC)
879		opts = 1;
880	if (r->rule_flag & PFRULE_SRCTRACK)
881		opts = 1;
882	if (r->rule_flag & PFRULE_IFBOUND)
883		opts = 1;
884	if (r->rule_flag & PFRULE_STATESLOPPY)
885		opts = 1;
886	for (i = 0; !opts && i < PFTM_MAX; ++i)
887		if (r->timeout[i])
888			opts = 1;
889	if (opts) {
890		printf(" (");
891		if (r->max_states) {
892			printf("max %u", r->max_states);
893			opts = 0;
894		}
895		if (r->rule_flag & PFRULE_NOSYNC) {
896			if (!opts)
897				printf(", ");
898			printf("no-sync");
899			opts = 0;
900		}
901		if (r->rule_flag & PFRULE_SRCTRACK) {
902			if (!opts)
903				printf(", ");
904			printf("source-track");
905			if (r->rule_flag & PFRULE_RULESRCTRACK)
906				printf(" rule");
907			else
908				printf(" global");
909			opts = 0;
910		}
911		if (r->max_src_states) {
912			if (!opts)
913				printf(", ");
914			printf("max-src-states %u", r->max_src_states);
915			opts = 0;
916		}
917		if (r->max_src_conn) {
918			if (!opts)
919				printf(", ");
920			printf("max-src-conn %u", r->max_src_conn);
921			opts = 0;
922		}
923		if (r->max_src_conn_rate.limit) {
924			if (!opts)
925				printf(", ");
926			printf("max-src-conn-rate %u/%u",
927			    r->max_src_conn_rate.limit,
928			    r->max_src_conn_rate.seconds);
929			opts = 0;
930		}
931		if (r->max_src_nodes) {
932			if (!opts)
933				printf(", ");
934			printf("max-src-nodes %u", r->max_src_nodes);
935			opts = 0;
936		}
937		if (r->overload_tblname[0]) {
938			if (!opts)
939				printf(", ");
940			printf("overload <%s>", r->overload_tblname);
941			if (r->flush)
942				printf(" flush");
943			if (r->flush & PF_FLUSH_GLOBAL)
944				printf(" global");
945		}
946		if (r->rule_flag & PFRULE_IFBOUND) {
947			if (!opts)
948				printf(", ");
949			printf("if-bound");
950			opts = 0;
951		}
952		if (r->rule_flag & PFRULE_STATESLOPPY) {
953			if (!opts)
954				printf(", ");
955			printf("sloppy");
956			opts = 0;
957		}
958		for (i = 0; i < PFTM_MAX; ++i)
959			if (r->timeout[i]) {
960				int j;
961
962				if (!opts)
963					printf(", ");
964				opts = 0;
965				for (j = 0; pf_timeouts[j].name != NULL;
966				    ++j)
967					if (pf_timeouts[j].timeout == i)
968						break;
969				printf("%s %u", pf_timeouts[j].name == NULL ?
970				    "inv.timeout" : pf_timeouts[j].name,
971				    r->timeout[i]);
972			}
973		printf(")");
974	}
975	if (r->rule_flag & PFRULE_FRAGMENT)
976		printf(" fragment");
977	if (r->rule_flag & PFRULE_NODF)
978		printf(" no-df");
979	if (r->rule_flag & PFRULE_RANDOMID)
980		printf(" random-id");
981	if (r->min_ttl)
982		printf(" min-ttl %d", r->min_ttl);
983	if (r->max_mss)
984		printf(" max-mss %d", r->max_mss);
985	if (r->rule_flag & PFRULE_SET_TOS)
986		printf(" set-tos 0x%2.2x", r->set_tos);
987	if (r->allow_opts)
988		printf(" allow-opts");
989	if (r->action == PF_SCRUB) {
990		if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
991			printf(" reassemble tcp");
992
993		if (r->rule_flag & PFRULE_FRAGDROP)
994			printf(" fragment drop-ovl");
995		else if (r->rule_flag & PFRULE_FRAGCROP)
996			printf(" fragment crop");
997		else
998			printf(" fragment reassemble");
999	}
1000	if (r->label[0])
1001		printf(" label \"%s\"", r->label);
1002	if (r->qname[0] && r->pqname[0])
1003		printf(" queue(%s, %s)", r->qname, r->pqname);
1004	else if (r->qname[0])
1005		printf(" queue %s", r->qname);
1006	if (r->tagname[0])
1007		printf(" tag %s", r->tagname);
1008	if (r->match_tagname[0]) {
1009		if (r->match_tag_not)
1010			printf(" !");
1011		printf(" tagged %s", r->match_tagname);
1012	}
1013	if (r->rtableid != -1)
1014		printf(" rtable %u", r->rtableid);
1015	if (r->divert.port) {
1016#ifdef __FreeBSD__
1017		printf(" divert-to %u", ntohs(r->divert.port));
1018#else
1019		if (PF_AZERO(&r->divert.addr, r->af)) {
1020			printf(" divert-reply");
1021		} else {
1022			/* XXX cut&paste from print_addr */
1023			char buf[48];
1024
1025			printf(" divert-to ");
1026			if (inet_ntop(r->af, &r->divert.addr, buf,
1027			    sizeof(buf)) == NULL)
1028				printf("?");
1029			else
1030				printf("%s", buf);
1031			printf(" port %u", ntohs(r->divert.port));
1032		}
1033#endif
1034	}
1035	if (!anchor_call[0] && (r->action == PF_NAT ||
1036	    r->action == PF_BINAT || r->action == PF_RDR)) {
1037		printf(" -> ");
1038		print_pool(&r->rpool, r->rpool.proxy_port[0],
1039		    r->rpool.proxy_port[1], r->af, r->action);
1040	}
1041}
1042
1043void
1044print_tabledef(const char *name, int flags, int addrs,
1045    struct node_tinithead *nodes)
1046{
1047	struct node_tinit	*ti, *nti;
1048	struct node_host	*h;
1049
1050	printf("table <%s>", name);
1051	if (flags & PFR_TFLAG_CONST)
1052		printf(" const");
1053	if (flags & PFR_TFLAG_PERSIST)
1054		printf(" persist");
1055	if (flags & PFR_TFLAG_COUNTERS)
1056		printf(" counters");
1057	SIMPLEQ_FOREACH(ti, nodes, entries) {
1058		if (ti->file) {
1059			printf(" file \"%s\"", ti->file);
1060			continue;
1061		}
1062		printf(" {");
1063		for (;;) {
1064			for (h = ti->host; h != NULL; h = h->next) {
1065				printf(h->not ? " !" : " ");
1066				print_addr(&h->addr, h->af, 0);
1067			}
1068			nti = SIMPLEQ_NEXT(ti, entries);
1069			if (nti != NULL && nti->file == NULL)
1070				ti = nti;	/* merge lists */
1071			else
1072				break;
1073		}
1074		printf(" }");
1075	}
1076	if (addrs && SIMPLEQ_EMPTY(nodes))
1077		printf(" { }");
1078	printf("\n");
1079}
1080
1081int
1082parse_flags(char *s)
1083{
1084	char		*p, *q;
1085	u_int8_t	 f = 0;
1086
1087	for (p = s; *p; p++) {
1088		if ((q = strchr(tcpflags, *p)) == NULL)
1089			return -1;
1090		else
1091			f |= 1 << (q - tcpflags);
1092	}
1093	return (f ? f : PF_TH_ALL);
1094}
1095
1096void
1097set_ipmask(struct node_host *h, u_int8_t b)
1098{
1099	struct pf_addr	*m, *n;
1100	int		 i, j = 0;
1101
1102	m = &h->addr.v.a.mask;
1103	memset(m, 0, sizeof(*m));
1104
1105	while (b >= 32) {
1106		m->addr32[j++] = 0xffffffff;
1107		b -= 32;
1108	}
1109	for (i = 31; i > 31-b; --i)
1110		m->addr32[j] |= (1 << i);
1111	if (b)
1112		m->addr32[j] = htonl(m->addr32[j]);
1113
1114	/* Mask off bits of the address that will never be used. */
1115	n = &h->addr.v.a.addr;
1116	if (h->addr.type == PF_ADDR_ADDRMASK)
1117		for (i = 0; i < 4; i++)
1118			n->addr32[i] = n->addr32[i] & m->addr32[i];
1119}
1120
1121int
1122check_netmask(struct node_host *h, sa_family_t af)
1123{
1124	struct node_host	*n = NULL;
1125	struct pf_addr	*m;
1126
1127	for (n = h; n != NULL; n = n->next) {
1128		if (h->addr.type == PF_ADDR_TABLE)
1129			continue;
1130		m = &h->addr.v.a.mask;
1131		/* fix up netmask for dynaddr */
1132		if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1133		    unmask(m, AF_INET6) > 32)
1134			set_ipmask(n, 32);
1135		/* netmasks > 32 bit are invalid on v4 */
1136		if (af == AF_INET &&
1137		    (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1138			fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1139			    unmask(m, AF_INET6));
1140			return (1);
1141		}
1142	}
1143	return (0);
1144}
1145
1146/* interface lookup routines */
1147
1148struct node_host	*iftab;
1149
1150void
1151ifa_load(void)
1152{
1153	struct ifaddrs		*ifap, *ifa;
1154	struct node_host	*n = NULL, *h = NULL;
1155
1156	if (getifaddrs(&ifap) < 0)
1157		err(1, "getifaddrs");
1158
1159	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1160		if (!(ifa->ifa_addr->sa_family == AF_INET ||
1161		    ifa->ifa_addr->sa_family == AF_INET6 ||
1162		    ifa->ifa_addr->sa_family == AF_LINK))
1163				continue;
1164		n = calloc(1, sizeof(struct node_host));
1165		if (n == NULL)
1166			err(1, "address: calloc");
1167		n->af = ifa->ifa_addr->sa_family;
1168		n->ifa_flags = ifa->ifa_flags;
1169#ifdef __KAME__
1170		if (n->af == AF_INET6 &&
1171		    IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1172		    ifa->ifa_addr)->sin6_addr) &&
1173		    ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1174		    0) {
1175			struct sockaddr_in6	*sin6;
1176
1177			sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1178			sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1179			    sin6->sin6_addr.s6_addr[3];
1180			sin6->sin6_addr.s6_addr[2] = 0;
1181			sin6->sin6_addr.s6_addr[3] = 0;
1182		}
1183#endif
1184		n->ifindex = 0;
1185		if (n->af == AF_INET) {
1186			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1187			    ifa->ifa_addr)->sin_addr.s_addr,
1188			    sizeof(struct in_addr));
1189			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1190			    ifa->ifa_netmask)->sin_addr.s_addr,
1191			    sizeof(struct in_addr));
1192			if (ifa->ifa_broadaddr != NULL)
1193				memcpy(&n->bcast, &((struct sockaddr_in *)
1194				    ifa->ifa_broadaddr)->sin_addr.s_addr,
1195				    sizeof(struct in_addr));
1196			if (ifa->ifa_dstaddr != NULL)
1197				memcpy(&n->peer, &((struct sockaddr_in *)
1198				    ifa->ifa_dstaddr)->sin_addr.s_addr,
1199				    sizeof(struct in_addr));
1200		} else if (n->af == AF_INET6) {
1201			memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1202			    ifa->ifa_addr)->sin6_addr.s6_addr,
1203			    sizeof(struct in6_addr));
1204			memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1205			    ifa->ifa_netmask)->sin6_addr.s6_addr,
1206			    sizeof(struct in6_addr));
1207			if (ifa->ifa_broadaddr != NULL)
1208				memcpy(&n->bcast, &((struct sockaddr_in6 *)
1209				    ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1210				    sizeof(struct in6_addr));
1211			if (ifa->ifa_dstaddr != NULL)
1212				 memcpy(&n->peer, &((struct sockaddr_in6 *)
1213				    ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1214				    sizeof(struct in6_addr));
1215			n->ifindex = ((struct sockaddr_in6 *)
1216			    ifa->ifa_addr)->sin6_scope_id;
1217		}
1218		if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1219			err(1, "ifa_load: strdup");
1220		n->next = NULL;
1221		n->tail = n;
1222		if (h == NULL)
1223			h = n;
1224		else {
1225			h->tail->next = n;
1226			h->tail = n;
1227		}
1228	}
1229
1230	iftab = h;
1231	freeifaddrs(ifap);
1232}
1233
1234int
1235get_socket_domain(void)
1236{
1237	int sdom;
1238
1239	sdom = AF_UNSPEC;
1240#ifdef WITH_INET6
1241	if (sdom == AF_UNSPEC && feature_present("inet6"))
1242		sdom = AF_INET6;
1243#endif
1244#ifdef WITH_INET
1245	if (sdom == AF_UNSPEC && feature_present("inet"))
1246		sdom = AF_INET;
1247#endif
1248	if (sdom == AF_UNSPEC)
1249		sdom = AF_LINK;
1250
1251	return (sdom);
1252}
1253
1254struct node_host *
1255ifa_exists(const char *ifa_name)
1256{
1257	struct node_host	*n;
1258	struct ifgroupreq	ifgr;
1259	int			s;
1260
1261	if (iftab == NULL)
1262		ifa_load();
1263
1264	/* check wether this is a group */
1265	if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1266		err(1, "socket");
1267	bzero(&ifgr, sizeof(ifgr));
1268	strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1269	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1270		/* fake a node_host */
1271		if ((n = calloc(1, sizeof(*n))) == NULL)
1272			err(1, "calloc");
1273		if ((n->ifname = strdup(ifa_name)) == NULL)
1274			err(1, "strdup");
1275		close(s);
1276		return (n);
1277	}
1278	close(s);
1279
1280	for (n = iftab; n; n = n->next) {
1281		if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1282			return (n);
1283	}
1284
1285	return (NULL);
1286}
1287
1288struct node_host *
1289ifa_grouplookup(const char *ifa_name, int flags)
1290{
1291	struct ifg_req		*ifg;
1292	struct ifgroupreq	 ifgr;
1293	int			 s, len;
1294	struct node_host	*n, *h = NULL;
1295
1296	if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1297		err(1, "socket");
1298	bzero(&ifgr, sizeof(ifgr));
1299	strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1300	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1301		close(s);
1302		return (NULL);
1303	}
1304
1305	len = ifgr.ifgr_len;
1306	if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1307		err(1, "calloc");
1308	if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1309		err(1, "SIOCGIFGMEMB");
1310
1311	for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1312	    ifg++) {
1313		len -= sizeof(struct ifg_req);
1314		if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1315			continue;
1316		if (h == NULL)
1317			h = n;
1318		else {
1319			h->tail->next = n;
1320			h->tail = n->tail;
1321		}
1322	}
1323	free(ifgr.ifgr_groups);
1324	close(s);
1325
1326	return (h);
1327}
1328
1329struct node_host *
1330ifa_lookup(const char *ifa_name, int flags)
1331{
1332	struct node_host	*p = NULL, *h = NULL, *n = NULL;
1333	int			 got4 = 0, got6 = 0;
1334	const char		 *last_if = NULL;
1335
1336	if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1337		return (h);
1338
1339	if (!strncmp(ifa_name, "self", IFNAMSIZ))
1340		ifa_name = NULL;
1341
1342	if (iftab == NULL)
1343		ifa_load();
1344
1345	for (p = iftab; p; p = p->next) {
1346		if (ifa_skip_if(ifa_name, p))
1347			continue;
1348		if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1349			continue;
1350		if ((flags & PFI_AFLAG_BROADCAST) &&
1351		    !(p->ifa_flags & IFF_BROADCAST))
1352			continue;
1353		if ((flags & PFI_AFLAG_PEER) &&
1354		    !(p->ifa_flags & IFF_POINTOPOINT))
1355			continue;
1356		if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1357			continue;
1358		if (last_if == NULL || strcmp(last_if, p->ifname))
1359			got4 = got6 = 0;
1360		last_if = p->ifname;
1361		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1362			continue;
1363		if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1364			continue;
1365		if (p->af == AF_INET)
1366			got4 = 1;
1367		else
1368			got6 = 1;
1369		n = calloc(1, sizeof(struct node_host));
1370		if (n == NULL)
1371			err(1, "address: calloc");
1372		n->af = p->af;
1373		if (flags & PFI_AFLAG_BROADCAST)
1374			memcpy(&n->addr.v.a.addr, &p->bcast,
1375			    sizeof(struct pf_addr));
1376		else if (flags & PFI_AFLAG_PEER)
1377			memcpy(&n->addr.v.a.addr, &p->peer,
1378			    sizeof(struct pf_addr));
1379		else
1380			memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1381			    sizeof(struct pf_addr));
1382		if (flags & PFI_AFLAG_NETWORK)
1383			set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1384		else {
1385			if (n->af == AF_INET) {
1386				if (p->ifa_flags & IFF_LOOPBACK &&
1387				    p->ifa_flags & IFF_LINK1)
1388					memcpy(&n->addr.v.a.mask,
1389					    &p->addr.v.a.mask,
1390					    sizeof(struct pf_addr));
1391				else
1392					set_ipmask(n, 32);
1393			} else
1394				set_ipmask(n, 128);
1395		}
1396		n->ifindex = p->ifindex;
1397
1398		n->next = NULL;
1399		n->tail = n;
1400		if (h == NULL)
1401			h = n;
1402		else {
1403			h->tail->next = n;
1404			h->tail = n;
1405		}
1406	}
1407	return (h);
1408}
1409
1410int
1411ifa_skip_if(const char *filter, struct node_host *p)
1412{
1413	int	n;
1414
1415	if (p->af != AF_INET && p->af != AF_INET6)
1416		return (1);
1417	if (filter == NULL || !*filter)
1418		return (0);
1419	if (!strcmp(p->ifname, filter))
1420		return (0);	/* exact match */
1421	n = strlen(filter);
1422	if (n < 1 || n >= IFNAMSIZ)
1423		return (1);	/* sanity check */
1424	if (filter[n-1] >= '0' && filter[n-1] <= '9')
1425		return (1);	/* only do exact match in that case */
1426	if (strncmp(p->ifname, filter, n))
1427		return (1);	/* prefix doesn't match */
1428	return (p->ifname[n] < '0' || p->ifname[n] > '9');
1429}
1430
1431
1432struct node_host *
1433host(const char *s)
1434{
1435	struct node_host	*h = NULL;
1436	int			 mask, v4mask, v6mask, cont = 1;
1437	char			*p, *q, *ps;
1438
1439	if ((p = strrchr(s, '/')) != NULL) {
1440		mask = strtol(p+1, &q, 0);
1441		if (!q || *q || mask > 128 || q == (p+1)) {
1442			fprintf(stderr, "invalid netmask '%s'\n", p);
1443			return (NULL);
1444		}
1445		if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1446			err(1, "host: malloc");
1447		strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1448		v4mask = v6mask = mask;
1449	} else {
1450		if ((ps = strdup(s)) == NULL)
1451			err(1, "host: strdup");
1452		v4mask = 32;
1453		v6mask = 128;
1454		mask = -1;
1455	}
1456
1457	/* interface with this name exists? */
1458	if (cont && (h = host_if(ps, mask)) != NULL)
1459		cont = 0;
1460
1461	/* IPv4 address? */
1462	if (cont && (h = host_v4(s, mask)) != NULL)
1463		cont = 0;
1464
1465	/* IPv6 address? */
1466	if (cont && (h = host_v6(ps, v6mask)) != NULL)
1467		cont = 0;
1468
1469	/* dns lookup */
1470	if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1471		cont = 0;
1472	free(ps);
1473
1474	if (h == NULL || cont == 1) {
1475		fprintf(stderr, "no IP address found for %s\n", s);
1476		return (NULL);
1477	}
1478	return (h);
1479}
1480
1481struct node_host *
1482host_if(const char *s, int mask)
1483{
1484	struct node_host	*n, *h = NULL;
1485	char			*p, *ps;
1486	int			 flags = 0;
1487
1488	if ((ps = strdup(s)) == NULL)
1489		err(1, "host_if: strdup");
1490	while ((p = strrchr(ps, ':')) != NULL) {
1491		if (!strcmp(p+1, "network"))
1492			flags |= PFI_AFLAG_NETWORK;
1493		else if (!strcmp(p+1, "broadcast"))
1494			flags |= PFI_AFLAG_BROADCAST;
1495		else if (!strcmp(p+1, "peer"))
1496			flags |= PFI_AFLAG_PEER;
1497		else if (!strcmp(p+1, "0"))
1498			flags |= PFI_AFLAG_NOALIAS;
1499		else {
1500			free(ps);
1501			return (NULL);
1502		}
1503		*p = '\0';
1504	}
1505	if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1506		fprintf(stderr, "illegal combination of interface modifiers\n");
1507		free(ps);
1508		return (NULL);
1509	}
1510	if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1511		fprintf(stderr, "network or broadcast lookup, but "
1512		    "extra netmask given\n");
1513		free(ps);
1514		return (NULL);
1515	}
1516	if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1517		/* interface with this name exists */
1518		h = ifa_lookup(ps, flags);
1519		for (n = h; n != NULL && mask > -1; n = n->next)
1520			set_ipmask(n, mask);
1521	}
1522
1523	free(ps);
1524	return (h);
1525}
1526
1527struct node_host *
1528host_v4(const char *s, int mask)
1529{
1530	struct node_host	*h = NULL;
1531	struct in_addr		 ina;
1532	int			 bits = 32;
1533
1534	memset(&ina, 0, sizeof(struct in_addr));
1535	if (strrchr(s, '/') != NULL) {
1536		if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1537			return (NULL);
1538	} else {
1539		if (inet_pton(AF_INET, s, &ina) != 1)
1540			return (NULL);
1541	}
1542
1543	h = calloc(1, sizeof(struct node_host));
1544	if (h == NULL)
1545		err(1, "address: calloc");
1546	h->ifname = NULL;
1547	h->af = AF_INET;
1548	h->addr.v.a.addr.addr32[0] = ina.s_addr;
1549	set_ipmask(h, bits);
1550	h->next = NULL;
1551	h->tail = h;
1552
1553	return (h);
1554}
1555
1556struct node_host *
1557host_v6(const char *s, int mask)
1558{
1559	struct addrinfo		 hints, *res;
1560	struct node_host	*h = NULL;
1561
1562	memset(&hints, 0, sizeof(hints));
1563	hints.ai_family = AF_INET6;
1564	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1565	hints.ai_flags = AI_NUMERICHOST;
1566	if (getaddrinfo(s, "0", &hints, &res) == 0) {
1567		h = calloc(1, sizeof(struct node_host));
1568		if (h == NULL)
1569			err(1, "address: calloc");
1570		h->ifname = NULL;
1571		h->af = AF_INET6;
1572		memcpy(&h->addr.v.a.addr,
1573		    &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1574		    sizeof(h->addr.v.a.addr));
1575		h->ifindex =
1576		    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1577		set_ipmask(h, mask);
1578		freeaddrinfo(res);
1579		h->next = NULL;
1580		h->tail = h;
1581	}
1582
1583	return (h);
1584}
1585
1586struct node_host *
1587host_dns(const char *s, int v4mask, int v6mask)
1588{
1589	struct addrinfo		 hints, *res0, *res;
1590	struct node_host	*n, *h = NULL;
1591	int			 error, noalias = 0;
1592	int			 got4 = 0, got6 = 0;
1593	char			*p, *ps;
1594
1595	if ((ps = strdup(s)) == NULL)
1596		err(1, "host_dns: strdup");
1597	if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1598		noalias = 1;
1599		*p = '\0';
1600	}
1601	memset(&hints, 0, sizeof(hints));
1602	hints.ai_family = PF_UNSPEC;
1603	hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1604	error = getaddrinfo(ps, NULL, &hints, &res0);
1605	if (error) {
1606		free(ps);
1607		return (h);
1608	}
1609
1610	for (res = res0; res; res = res->ai_next) {
1611		if (res->ai_family != AF_INET &&
1612		    res->ai_family != AF_INET6)
1613			continue;
1614		if (noalias) {
1615			if (res->ai_family == AF_INET) {
1616				if (got4)
1617					continue;
1618				got4 = 1;
1619			} else {
1620				if (got6)
1621					continue;
1622				got6 = 1;
1623			}
1624		}
1625		n = calloc(1, sizeof(struct node_host));
1626		if (n == NULL)
1627			err(1, "host_dns: calloc");
1628		n->ifname = NULL;
1629		n->af = res->ai_family;
1630		if (res->ai_family == AF_INET) {
1631			memcpy(&n->addr.v.a.addr,
1632			    &((struct sockaddr_in *)
1633			    res->ai_addr)->sin_addr.s_addr,
1634			    sizeof(struct in_addr));
1635			set_ipmask(n, v4mask);
1636		} else {
1637			memcpy(&n->addr.v.a.addr,
1638			    &((struct sockaddr_in6 *)
1639			    res->ai_addr)->sin6_addr.s6_addr,
1640			    sizeof(struct in6_addr));
1641			n->ifindex =
1642			    ((struct sockaddr_in6 *)
1643			    res->ai_addr)->sin6_scope_id;
1644			set_ipmask(n, v6mask);
1645		}
1646		n->next = NULL;
1647		n->tail = n;
1648		if (h == NULL)
1649			h = n;
1650		else {
1651			h->tail->next = n;
1652			h->tail = n;
1653		}
1654	}
1655	freeaddrinfo(res0);
1656	free(ps);
1657
1658	return (h);
1659}
1660
1661/*
1662 * convert a hostname to a list of addresses and put them in the given buffer.
1663 * test:
1664 *	if set to 1, only simple addresses are accepted (no netblock, no "!").
1665 */
1666int
1667append_addr(struct pfr_buffer *b, char *s, int test)
1668{
1669	char			 *r;
1670	struct node_host	*h, *n;
1671	int			 rv, not = 0;
1672
1673	for (r = s; *r == '!'; r++)
1674		not = !not;
1675	if ((n = host(r)) == NULL) {
1676		errno = 0;
1677		return (-1);
1678	}
1679	rv = append_addr_host(b, n, test, not);
1680	do {
1681		h = n;
1682		n = n->next;
1683		free(h);
1684	} while (n != NULL);
1685	return (rv);
1686}
1687
1688/*
1689 * same as previous function, but with a pre-parsed input and the ability
1690 * to "negate" the result. Does not free the node_host list.
1691 * not:
1692 *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1693 */
1694int
1695append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1696{
1697	int			 bits;
1698	struct pfr_addr		 addr;
1699
1700	do {
1701		bzero(&addr, sizeof(addr));
1702		addr.pfra_not = n->not ^ not;
1703		addr.pfra_af = n->af;
1704		addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1705		switch (n->af) {
1706		case AF_INET:
1707			addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1708			bits = 32;
1709			break;
1710		case AF_INET6:
1711			memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1712			    sizeof(struct in6_addr));
1713			bits = 128;
1714			break;
1715		default:
1716			errno = EINVAL;
1717			return (-1);
1718		}
1719		if ((test && (not || addr.pfra_net != bits)) ||
1720		    addr.pfra_net > bits) {
1721			errno = EINVAL;
1722			return (-1);
1723		}
1724		if (pfr_buf_add(b, &addr))
1725			return (-1);
1726	} while ((n = n->next) != NULL);
1727
1728	return (0);
1729}
1730
1731int
1732pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1733{
1734	struct pfioc_trans_e trans;
1735
1736	bzero(&trans, sizeof(trans));
1737	trans.rs_num = rs_num;
1738	if (strlcpy(trans.anchor, anchor,
1739	    sizeof(trans.anchor)) >= sizeof(trans.anchor))
1740		errx(1, "pfctl_add_trans: strlcpy");
1741
1742	return pfr_buf_add(buf, &trans);
1743}
1744
1745u_int32_t
1746pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1747{
1748	struct pfioc_trans_e *p;
1749
1750	PFRB_FOREACH(p, buf)
1751		if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1752			return (p->ticket);
1753	errx(1, "pfctl_get_ticket: assertion failed");
1754}
1755
1756int
1757pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1758{
1759	struct pfioc_trans trans;
1760
1761	bzero(&trans, sizeof(trans));
1762	trans.size = buf->pfrb_size - from;
1763	trans.esize = sizeof(struct pfioc_trans_e);
1764	trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1765	return ioctl(dev, cmd, &trans);
1766}
1767