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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/bgpd/config.c	Lines:	0	217	0.0 %
Date:	2016-12-06	Branches:	0	137	0.0 %


/*	$OpenBSD: config.c,v 1.63 2016/01/26 18:35:01 mmcc Exp $ */

/*
 * Copyright (c) 2003, 2004, 2005 Henning Brauer <henning@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ioctl.h>

#include <netmpls/mpls.h>

#include <errno.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "bgpd.h"
#include "session.h"

u_int32_t	get_bgpid(void);
int		host_v4(const char *, struct bgpd_addr *, u_int8_t *);
int		host_v6(const char *, struct bgpd_addr *);
void		free_networks(struct network_head *);
void		free_rdomains(struct rdomain_head *);

struct bgpd_config *
new_config(void)
{
	struct bgpd_config *conf;

	if ((conf = calloc(1, sizeof(struct bgpd_config))) == NULL)
		fatal(NULL);

	conf->min_holdtime = MIN_HOLDTIME;
	conf->bgpid = get_bgpid();
	conf->fib_priority = RTP_BGP;

	if ((conf->csock = strdup(SOCKET_NAME)) == NULL)
		fatal(NULL);

	if ((conf->filters = calloc(1, sizeof(struct filter_head))) == NULL)
		fatal(NULL);
	if ((conf->listen_addrs = calloc(1, sizeof(struct listen_addrs))) ==
	    NULL)
		fatal(NULL);
	if ((conf->mrt = calloc(1, sizeof(struct mrt_head))) == NULL)
		fatal(NULL);

	/* init the various list for later */
	TAILQ_INIT(&conf->networks);
	SIMPLEQ_INIT(&conf->rdomains);

	TAILQ_INIT(conf->filters);
	TAILQ_INIT(conf->listen_addrs);
	LIST_INIT(conf->mrt);

	return (conf);
}

void
free_networks(struct network_head *networks)
{
	struct network		*n;

	while ((n = TAILQ_FIRST(networks)) != NULL) {
		TAILQ_REMOVE(networks, n, entry);
		filterset_free(&n->net.attrset);
		free(n);
	}
}

void
free_rdomains(struct rdomain_head *rdomains)
{
	struct rdomain		*rd;

	while ((rd = SIMPLEQ_FIRST(rdomains)) != NULL) {
		SIMPLEQ_REMOVE_HEAD(rdomains, entry);
		filterset_free(&rd->export);
		filterset_free(&rd->import);
		free_networks(&rd->net_l);
		free(rd);
	}
}

void
free_config(struct bgpd_config *conf)
{
	struct listen_addr	*la;
	struct mrt		*m;

	free_rdomains(&conf->rdomains);
	free_networks(&conf->networks);
	filterlist_free(conf->filters);

	while ((la = TAILQ_FIRST(conf->listen_addrs)) != NULL) {
		TAILQ_REMOVE(conf->listen_addrs, la, entry);
		free(la);
	}
	free(conf->listen_addrs);

	while ((m = LIST_FIRST(conf->mrt)) != NULL) {
		LIST_REMOVE(m, entry);
		free(m);
	}
	free(conf->mrt);

	free(conf->csock);
	free(conf->rcsock);

	free(conf);
}

int
merge_config(struct bgpd_config *xconf, struct bgpd_config *conf,
    struct peer *peer_l)
{
	struct listen_addr	*nla, *ola, *next;
	struct network		*n;
	struct rdomain		*rd;

	/*
	 * merge the freshly parsed conf into the running xconf
	 */
	if (!conf->as) {
		log_warnx("configuration error: AS not given");
		return (1);
	}

	if ((conf->flags & BGPD_FLAG_REFLECTOR) && conf->clusterid == 0)
		conf->clusterid = conf->bgpid;


	/* adjust FIB priority if changed */
	/* if xconf is uninitialized we get RTP_NONE */
	if (xconf->fib_priority != conf->fib_priority) {
		kr_fib_decouple_all(xconf->fib_priority);
		kr_fib_update_prio_all(conf->fib_priority);
		kr_fib_couple_all(conf->fib_priority);
	}

	/* take over the easy config changes */
	xconf->flags = conf->flags;
	xconf->log = conf->log;
	xconf->bgpid = conf->bgpid;
	xconf->clusterid = conf->clusterid;
	xconf->as = conf->as;
	xconf->short_as = conf->short_as;
	xconf->holdtime = conf->holdtime;
	xconf->min_holdtime = conf->min_holdtime;
	xconf->connectretry = conf->connectretry;
	xconf->fib_priority = conf->fib_priority;

	/* clear old control sockets and use new */
	free(xconf->csock);
	free(xconf->rcsock);
	xconf->csock = conf->csock;
	xconf->rcsock = conf->rcsock;
	/* set old one to NULL so we don't double free */
	conf->csock = NULL;
	conf->rcsock = NULL;

	/* clear all current filters and take over the new ones */
	filterlist_free(xconf->filters);
	xconf->filters = conf->filters;
	conf->filters = NULL;

	/* switch the network statements, but first remove the old ones */
	free_networks(&xconf->networks);
	while ((n = TAILQ_FIRST(&conf->networks)) != NULL) {
		TAILQ_REMOVE(&conf->networks, n, entry);
		TAILQ_INSERT_TAIL(&xconf->networks, n, entry);
	}

	/* switch the rdomain configs, first remove the old ones */
	free_rdomains(&xconf->rdomains);
	while ((rd = SIMPLEQ_FIRST(&conf->rdomains)) != NULL) {
		SIMPLEQ_REMOVE_HEAD(&conf->rdomains, entry);
		SIMPLEQ_INSERT_TAIL(&xconf->rdomains, rd, entry);
	}

	/*
	 * merge new listeners:
	 * -flag all existing ones as to be deleted
	 * -those that are in both new and old: flag to keep
	 * -new ones get inserted and flagged as to reinit
	 * -remove all that are still flagged for deletion
	 */

	TAILQ_FOREACH(nla, xconf->listen_addrs, entry)
		nla->reconf = RECONF_DELETE;

	/* no new listeners? preserve default ones */
	if (TAILQ_EMPTY(conf->listen_addrs))
		TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
			if (ola->flags & DEFAULT_LISTENER)
				ola->reconf = RECONF_KEEP;
	/* else loop over listeners and merge configs */
	for (nla = TAILQ_FIRST(conf->listen_addrs); nla != NULL; nla = next) {
		next = TAILQ_NEXT(nla, entry);

		TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
			if (!memcmp(&nla->sa, &ola->sa, sizeof(nla->sa)))
				break;

		if (ola == NULL) {
			/* new listener, copy over */
			TAILQ_REMOVE(conf->listen_addrs, nla, entry);
			TAILQ_INSERT_TAIL(xconf->listen_addrs, nla, entry);
			nla->reconf = RECONF_REINIT;
		} else		/* exists, just flag */
			ola->reconf = RECONF_KEEP;
	}
	/* finally clean up the original list and remove all stale entires */
	for (nla = TAILQ_FIRST(xconf->listen_addrs); nla != NULL; nla = next) {
		next = TAILQ_NEXT(nla, entry);
		if (nla->reconf == RECONF_DELETE) {
			TAILQ_REMOVE(xconf->listen_addrs, nla, entry);
			free(nla);
		}
	}

	/* conf is merged so free it */
	free_config(conf);

	return (0);
}

u_int32_t
get_bgpid(void)
{
	struct ifaddrs		*ifap, *ifa;
	u_int32_t		 ip = 0, cur, localnet;

	localnet = htonl(INADDR_LOOPBACK & IN_CLASSA_NET);

	if (getifaddrs(&ifap) == -1)
		fatal("getifaddrs");

	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
		if (ifa->ifa_addr->sa_family != AF_INET)
			continue;
		cur = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
		if ((cur & localnet) == localnet)	/* skip 127/8 */
			continue;
		if (ntohl(cur) > ntohl(ip))
			ip = cur;
	}
	freeifaddrs(ifap);

	return (ip);
}

int
host(const char *s, struct bgpd_addr *h, u_int8_t *len)
{
	int			 done = 0;
	int			 mask;
	char			*p, *ps;
	const char		*errstr;

	if ((p = strrchr(s, '/')) != NULL) {
		mask = strtonum(p + 1, 0, 128, &errstr);
		if (errstr) {
			log_warnx("prefixlen is %s: %s", errstr, p + 1);
			return (0);
		}
		if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
			fatal("host: malloc");
		strlcpy(ps, s, strlen(s) - strlen(p) + 1);
	} else {
		if ((ps = strdup(s)) == NULL)
			fatal("host: strdup");
		mask = 128;
	}

	bzero(h, sizeof(struct bgpd_addr));

	/* IPv4 address? */
	if (!done)
		done = host_v4(s, h, len);

	/* IPv6 address? */
	if (!done) {
		done = host_v6(ps, h);
		*len = mask;
	}

	free(ps);

	return (done);
}

int
host_v4(const char *s, struct bgpd_addr *h, u_int8_t *len)
{
	struct in_addr		 ina;
	int			 bits = 32;

	bzero(&ina, sizeof(struct in_addr));
	if (strrchr(s, '/') != NULL) {
		if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
			return (0);
	} else {
		if (inet_pton(AF_INET, s, &ina) != 1)
			return (0);
	}

	h->aid = AID_INET;
	h->v4.s_addr = ina.s_addr;
	*len = bits;

	return (1);
}

int
host_v6(const char *s, struct bgpd_addr *h)
{
	struct addrinfo		 hints, *res;

	bzero(&hints, sizeof(hints));
	hints.ai_family = AF_INET6;
	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
	hints.ai_flags = AI_NUMERICHOST;
	if (getaddrinfo(s, "0", &hints, &res) == 0) {
		sa2addr(res->ai_addr, h);
		freeaddrinfo(res);
		return (1);
	}

	return (0);
}

void
prepare_listeners(struct bgpd_config *conf)
{
	struct listen_addr	*la, *next;
	int			 opt = 1;

	if (TAILQ_EMPTY(conf->listen_addrs)) {
		if ((la = calloc(1, sizeof(struct listen_addr))) == NULL)
			fatal("setup_listeners calloc");
		la->fd = -1;
		la->flags = DEFAULT_LISTENER;
		la->reconf = RECONF_REINIT;
		la->sa.ss_len = sizeof(struct sockaddr_in);
		((struct sockaddr_in *)&la->sa)->sin_family = AF_INET;
		((struct sockaddr_in *)&la->sa)->sin_addr.s_addr =
		    htonl(INADDR_ANY);
		((struct sockaddr_in *)&la->sa)->sin_port = htons(BGP_PORT);
		TAILQ_INSERT_TAIL(conf->listen_addrs, la, entry);

		if ((la = calloc(1, sizeof(struct listen_addr))) == NULL)
			fatal("setup_listeners calloc");
		la->fd = -1;
		la->flags = DEFAULT_LISTENER;
		la->reconf = RECONF_REINIT;
		la->sa.ss_len = sizeof(struct sockaddr_in6);
		((struct sockaddr_in6 *)&la->sa)->sin6_family = AF_INET6;
		((struct sockaddr_in6 *)&la->sa)->sin6_port = htons(BGP_PORT);
		TAILQ_INSERT_TAIL(conf->listen_addrs, la, entry);
	}

	for (la = TAILQ_FIRST(conf->listen_addrs); la != NULL; la = next) {
		next = TAILQ_NEXT(la, entry);
		if (la->reconf != RECONF_REINIT)
			continue;

		if ((la->fd = socket(la->sa.ss_family,
		    SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
		    IPPROTO_TCP)) == -1) {
			if (la->flags & DEFAULT_LISTENER && (errno ==
			    EAFNOSUPPORT || errno == EPROTONOSUPPORT)) {
				TAILQ_REMOVE(conf->listen_addrs, la, entry);
				free(la);
				continue;
			} else
				fatal("socket");
		}

		opt = 1;
		if (setsockopt(la->fd, SOL_SOCKET, SO_REUSEADDR,
		    &opt, sizeof(opt)) == -1)
			fatal("setsockopt SO_REUSEADDR");

		if (bind(la->fd, (struct sockaddr *)&la->sa, la->sa.ss_len) ==
		    -1) {
			switch (la->sa.ss_family) {
			case AF_INET:
				log_warn("cannot bind to %s:%u",
				    log_sockaddr((struct sockaddr *)&la->sa),
				    ntohs(((struct sockaddr_in *)
				    &la->sa)->sin_port));
				break;
			case AF_INET6:
				log_warn("cannot bind to [%s]:%u",
				    log_sockaddr((struct sockaddr *)&la->sa),
				    ntohs(((struct sockaddr_in6 *)
				    &la->sa)->sin6_port));
				break;
			default:
				log_warn("cannot bind to %s",
				    log_sockaddr((struct sockaddr *)&la->sa));
				break;
			}
			close(la->fd);
			TAILQ_REMOVE(conf->listen_addrs, la, entry);
			free(la);
			continue;
		}
	}
}

int
get_mpe_label(struct rdomain *r)
{
	struct  ifreq	ifr;
	struct shim_hdr	shim;
	int		s;

	s = socket(AF_INET, SOCK_DGRAM, 0);
	if (s == -1)
		return (-1);

	bzero(&shim, sizeof(shim));
	bzero(&ifr, sizeof(ifr));
	strlcpy(ifr.ifr_name, r->ifmpe, sizeof(ifr.ifr_name));
	ifr.ifr_data = (caddr_t)&shim;

	if (ioctl(s, SIOCGETLABEL, (caddr_t)&ifr) == -1) {
		close(s);
		return (-1);
	}
	close(s);
	r->label = shim.shim_label;
	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: config.c,v 1.63 2016/01/26 18:35:01 mmcc Exp $ */
2
3			/*
4			* Copyright (c) 2003, 2004, 2005 Henning Brauer <henning@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <sys/socket.h>
21			#include <sys/stat.h>
22			#include <sys/mman.h>
23			#include <sys/ioctl.h>
24
25			#include <netmpls/mpls.h>
26
27			#include <errno.h>
28			#include <ifaddrs.h>
29			#include <netdb.h>
30			#include <stdlib.h>
31			#include <string.h>
32			#include <unistd.h>
33
34			#include "bgpd.h"
35			#include "session.h"
36
37			u_int32_t get_bgpid(void);
38			int host_v4(const char , struct bgpd_addr , u_int8_t *);
39			int host_v6(const char , struct bgpd_addr );
40			void free_networks(struct network_head *);
41			void free_rdomains(struct rdomain_head *);
42
43			struct bgpd_config *
44			new_config(void)
45			{
46			struct bgpd_config *conf;
47
48			if ((conf = calloc(1, sizeof(struct bgpd_config))) == NULL)
49			fatal(NULL);
50
51			conf->min_holdtime = MIN_HOLDTIME;
52			conf->bgpid = get_bgpid();
53			conf->fib_priority = RTP_BGP;
54
55			if ((conf->csock = strdup(SOCKET_NAME)) == NULL)
56			fatal(NULL);
57
58			if ((conf->filters = calloc(1, sizeof(struct filter_head))) == NULL)
59			fatal(NULL);
60			if ((conf->listen_addrs = calloc(1, sizeof(struct listen_addrs))) ==
61			NULL)
62			fatal(NULL);
63			if ((conf->mrt = calloc(1, sizeof(struct mrt_head))) == NULL)
64			fatal(NULL);
65
66			/* init the various list for later */
67			TAILQ_INIT(&conf->networks);
68			SIMPLEQ_INIT(&conf->rdomains);
69
70			TAILQ_INIT(conf->filters);
71			TAILQ_INIT(conf->listen_addrs);
72			LIST_INIT(conf->mrt);
73
74			return (conf);
75			}
76
77			void
78			free_networks(struct network_head *networks)
79			{
80			struct network *n;
81
82			while ((n = TAILQ_FIRST(networks)) != NULL) {
83			TAILQ_REMOVE(networks, n, entry);
84			filterset_free(&n->net.attrset);
85			free(n);
86			}
87			}
88
89			void
90			free_rdomains(struct rdomain_head *rdomains)
91			{
92			struct rdomain *rd;
93
94			while ((rd = SIMPLEQ_FIRST(rdomains)) != NULL) {
95			SIMPLEQ_REMOVE_HEAD(rdomains, entry);
96			filterset_free(&rd->export);
97			filterset_free(&rd->import);
98			free_networks(&rd->net_l);
99			free(rd);
100			}
101			}
102
103			void
104			free_config(struct bgpd_config *conf)
105			{
106			struct listen_addr *la;
107			struct mrt *m;
108
109			free_rdomains(&conf->rdomains);
110			free_networks(&conf->networks);
111			filterlist_free(conf->filters);
112
113			while ((la = TAILQ_FIRST(conf->listen_addrs)) != NULL) {
114			TAILQ_REMOVE(conf->listen_addrs, la, entry);
115			free(la);
116			}
117			free(conf->listen_addrs);
118
119			while ((m = LIST_FIRST(conf->mrt)) != NULL) {
120			LIST_REMOVE(m, entry);
121			free(m);
122			}
123			free(conf->mrt);
124
125			free(conf->csock);
126			free(conf->rcsock);
127
128			free(conf);
129			}
130
131			int
132			merge_config(struct bgpd_config xconf, struct bgpd_config conf,
133			struct peer *peer_l)
134			{
135			struct listen_addr nla, ola, *next;
136			struct network *n;
137			struct rdomain *rd;
138
139			/*
140			* merge the freshly parsed conf into the running xconf
141			*/
142			if (!conf->as) {
143			log_warnx("configuration error: AS not given");
144			return (1);
145			}
146
147			if ((conf->flags & BGPD_FLAG_REFLECTOR) && conf->clusterid == 0)
148			conf->clusterid = conf->bgpid;
149
150
151			/* adjust FIB priority if changed */
152			/* if xconf is uninitialized we get RTP_NONE */
153			if (xconf->fib_priority != conf->fib_priority) {
154			kr_fib_decouple_all(xconf->fib_priority);
155			kr_fib_update_prio_all(conf->fib_priority);
156			kr_fib_couple_all(conf->fib_priority);
157			}
158
159			/* take over the easy config changes */
160			xconf->flags = conf->flags;
161			xconf->log = conf->log;
162			xconf->bgpid = conf->bgpid;
163			xconf->clusterid = conf->clusterid;
164			xconf->as = conf->as;
165			xconf->short_as = conf->short_as;
166			xconf->holdtime = conf->holdtime;
167			xconf->min_holdtime = conf->min_holdtime;
168			xconf->connectretry = conf->connectretry;
169			xconf->fib_priority = conf->fib_priority;
170
171			/* clear old control sockets and use new */
172			free(xconf->csock);
173			free(xconf->rcsock);
174			xconf->csock = conf->csock;
175			xconf->rcsock = conf->rcsock;
176			/* set old one to NULL so we don't double free */
177			conf->csock = NULL;
178			conf->rcsock = NULL;
179
180			/* clear all current filters and take over the new ones */
181			filterlist_free(xconf->filters);
182			xconf->filters = conf->filters;
183			conf->filters = NULL;
184
185			/* switch the network statements, but first remove the old ones */
186			free_networks(&xconf->networks);
187			while ((n = TAILQ_FIRST(&conf->networks)) != NULL) {
188			TAILQ_REMOVE(&conf->networks, n, entry);
189			TAILQ_INSERT_TAIL(&xconf->networks, n, entry);
190			}
191
192			/* switch the rdomain configs, first remove the old ones */
193			free_rdomains(&xconf->rdomains);
194			while ((rd = SIMPLEQ_FIRST(&conf->rdomains)) != NULL) {
195			SIMPLEQ_REMOVE_HEAD(&conf->rdomains, entry);
196			SIMPLEQ_INSERT_TAIL(&xconf->rdomains, rd, entry);
197			}
198
199			/*
200			* merge new listeners:
201			* -flag all existing ones as to be deleted
202			* -those that are in both new and old: flag to keep
203			* -new ones get inserted and flagged as to reinit
204			* -remove all that are still flagged for deletion
205			*/
206
207			TAILQ_FOREACH(nla, xconf->listen_addrs, entry)
208			nla->reconf = RECONF_DELETE;
209
210			/* no new listeners? preserve default ones */
211			if (TAILQ_EMPTY(conf->listen_addrs))
212			TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
213			if (ola->flags & DEFAULT_LISTENER)
214			ola->reconf = RECONF_KEEP;
215			/* else loop over listeners and merge configs */
216			for (nla = TAILQ_FIRST(conf->listen_addrs); nla != NULL; nla = next) {
217			next = TAILQ_NEXT(nla, entry);
218
219			TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
220			if (!memcmp(&nla->sa, &ola->sa, sizeof(nla->sa)))
221			break;
222
223			if (ola == NULL) {
224			/* new listener, copy over */
225			TAILQ_REMOVE(conf->listen_addrs, nla, entry);
226			TAILQ_INSERT_TAIL(xconf->listen_addrs, nla, entry);
227			nla->reconf = RECONF_REINIT;
228			} else /* exists, just flag */
229			ola->reconf = RECONF_KEEP;
230			}
231			/* finally clean up the original list and remove all stale entires */
232			for (nla = TAILQ_FIRST(xconf->listen_addrs); nla != NULL; nla = next) {
233			next = TAILQ_NEXT(nla, entry);
234			if (nla->reconf == RECONF_DELETE) {
235			TAILQ_REMOVE(xconf->listen_addrs, nla, entry);
236			free(nla);
237			}
238			}
239
240			/* conf is merged so free it */
241			free_config(conf);
242
243			return (0);
244			}
245
246			u_int32_t
247			get_bgpid(void)
248			{
249			struct ifaddrs ifap, ifa;
250			u_int32_t ip = 0, cur, localnet;
251
252			localnet = htonl(INADDR_LOOPBACK & IN_CLASSA_NET);
253
254			if (getifaddrs(&ifap) == -1)
255			fatal("getifaddrs");
256
257			for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
258			if (ifa->ifa_addr->sa_family != AF_INET)
259			continue;
260			cur = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
261			if ((cur & localnet) == localnet) /* skip 127/8 */
262			continue;
263			if (ntohl(cur) > ntohl(ip))
264			ip = cur;
265			}
266			freeifaddrs(ifap);
267
268			return (ip);
269			}
270
271			int
272			host(const char s, struct bgpd_addr h, u_int8_t *len)
273			{
274			int done = 0;
275			int mask;
276			char p, ps;
277			const char *errstr;
278
279			if ((p = strrchr(s, '/')) != NULL) {
280			mask = strtonum(p + 1, 0, 128, &errstr);
281			if (errstr) {
282			log_warnx("prefixlen is %s: %s", errstr, p + 1);
283			return (0);
284			}
285			if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
286			fatal("host: malloc");
287			strlcpy(ps, s, strlen(s) - strlen(p) + 1);
288			} else {
289			if ((ps = strdup(s)) == NULL)
290			fatal("host: strdup");
291			mask = 128;
292			}
293
294			bzero(h, sizeof(struct bgpd_addr));
295
296			/* IPv4 address? */
297			if (!done)
298			done = host_v4(s, h, len);
299
300			/* IPv6 address? */
301			if (!done) {
302			done = host_v6(ps, h);
303			*len = mask;
304			}
305
306			free(ps);
307
308			return (done);
309			}
310
311			int
312			host_v4(const char s, struct bgpd_addr h, u_int8_t *len)
313			{
314			struct in_addr ina;
315			int bits = 32;
316
317			bzero(&ina, sizeof(struct in_addr));
318			if (strrchr(s, '/') != NULL) {
319			if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
320			return (0);
321			} else {
322			if (inet_pton(AF_INET, s, &ina) != 1)
323			return (0);
324			}
325
326			h->aid = AID_INET;
327			h->v4.s_addr = ina.s_addr;
328			*len = bits;
329
330			return (1);
331			}
332
333			int
334			host_v6(const char s, struct bgpd_addr h)
335			{
336			struct addrinfo hints, *res;
337
338			bzero(&hints, sizeof(hints));
339			hints.ai_family = AF_INET6;
340			hints.ai_socktype = SOCK_DGRAM; /dummy/
341			hints.ai_flags = AI_NUMERICHOST;
342			if (getaddrinfo(s, "0", &hints, &res) == 0) {
343			sa2addr(res->ai_addr, h);
344			freeaddrinfo(res);
345			return (1);
346			}
347
348			return (0);
349			}
350
351			void
352			prepare_listeners(struct bgpd_config *conf)
353			{
354			struct listen_addr la, next;
355			int opt = 1;
356
357			if (TAILQ_EMPTY(conf->listen_addrs)) {
358			if ((la = calloc(1, sizeof(struct listen_addr))) == NULL)
359			fatal("setup_listeners calloc");
360			la->fd = -1;
361			la->flags = DEFAULT_LISTENER;
362			la->reconf = RECONF_REINIT;
363			la->sa.ss_len = sizeof(struct sockaddr_in);
364			((struct sockaddr_in *)&la->sa)->sin_family = AF_INET;
365			((struct sockaddr_in *)&la->sa)->sin_addr.s_addr =
366			htonl(INADDR_ANY);
367			((struct sockaddr_in *)&la->sa)->sin_port = htons(BGP_PORT);
368			TAILQ_INSERT_TAIL(conf->listen_addrs, la, entry);
369
370			if ((la = calloc(1, sizeof(struct listen_addr))) == NULL)
371			fatal("setup_listeners calloc");
372			la->fd = -1;
373			la->flags = DEFAULT_LISTENER;
374			la->reconf = RECONF_REINIT;
375			la->sa.ss_len = sizeof(struct sockaddr_in6);
376			((struct sockaddr_in6 *)&la->sa)->sin6_family = AF_INET6;
377			((struct sockaddr_in6 *)&la->sa)->sin6_port = htons(BGP_PORT);
378			TAILQ_INSERT_TAIL(conf->listen_addrs, la, entry);
379			}
380
381			for (la = TAILQ_FIRST(conf->listen_addrs); la != NULL; la = next) {
382			next = TAILQ_NEXT(la, entry);
383			if (la->reconf != RECONF_REINIT)
384			continue;
385
386			if ((la->fd = socket(la->sa.ss_family,
387			SOCK_STREAM \| SOCK_CLOEXEC \| SOCK_NONBLOCK,
388			IPPROTO_TCP)) == -1) {
389			if (la->flags & DEFAULT_LISTENER && (errno ==
390			EAFNOSUPPORT \|\| errno == EPROTONOSUPPORT)) {
391			TAILQ_REMOVE(conf->listen_addrs, la, entry);
392			free(la);
393			continue;
394			} else
395			fatal("socket");
396			}
397
398			opt = 1;
399			if (setsockopt(la->fd, SOL_SOCKET, SO_REUSEADDR,
400			&opt, sizeof(opt)) == -1)
401			fatal("setsockopt SO_REUSEADDR");
402
403			if (bind(la->fd, (struct sockaddr *)&la->sa, la->sa.ss_len) ==
404			-1) {
405			switch (la->sa.ss_family) {
406			case AF_INET:
407			log_warn("cannot bind to %s:%u",
408			log_sockaddr((struct sockaddr *)&la->sa),
409			ntohs(((struct sockaddr_in *)
410			&la->sa)->sin_port));
411			break;
412			case AF_INET6:
413			log_warn("cannot bind to [%s]:%u",
414			log_sockaddr((struct sockaddr *)&la->sa),
415			ntohs(((struct sockaddr_in6 *)
416			&la->sa)->sin6_port));
417			break;
418			default:
419			log_warn("cannot bind to %s",
420			log_sockaddr((struct sockaddr *)&la->sa));
421			break;
422			}
423			close(la->fd);
424			TAILQ_REMOVE(conf->listen_addrs, la, entry);
425			free(la);
426			continue;
427			}
428			}
429			}
430
431			int
432			get_mpe_label(struct rdomain *r)
433			{
434			struct ifreq ifr;
435			struct shim_hdr shim;
436			int s;
437
438			s = socket(AF_INET, SOCK_DGRAM, 0);
439			if (s == -1)
440			return (-1);
441
442			bzero(&shim, sizeof(shim));
443			bzero(&ifr, sizeof(ifr));
444			strlcpy(ifr.ifr_name, r->ifmpe, sizeof(ifr.ifr_name));
445			ifr.ifr_data = (caddr_t)&shim;
446
447			if (ioctl(s, SIOCGETLABEL, (caddr_t)&ifr) == -1) {
448			close(s);
449			return (-1);
450			}
451			close(s);
452			r->label = shim.shim_label;
453			return (0);
454			}