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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ripd/neighbor.c	Lines:	0	130	0.0 %
Date:	2017-11-13	Branches:	0	74	0.0 %


/*	$OpenBSD: neighbor.c,v 1.11 2017/01/17 16:30:54 jca Exp $ */

/*
 * Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2004, 2005, 2006 Esben Norby <norby@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/ioctl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <event.h>

#include "ripd.h"
#include "rip.h"
#include "ripe.h"
#include "log.h"
#include "rde.h"

void	nbr_set_timer(struct nbr *);
void	nbr_stop_timer(struct nbr *);

void	nbr_failed_new(struct nbr *);
void	nbr_failed_timeout(int, short, void *);

LIST_HEAD(nbr_head, nbr);

struct nbr_table {
	struct nbr_head		*hashtbl;
	u_int32_t		 hashmask;
} nbrtable;

#define NBR_HASH(x)		\
	&nbrtable.hashtbl[(x) & nbrtable.hashmask]

u_int32_t	peercnt = NBR_CNTSTART;

struct {
	int		state;
	enum nbr_event	event;
	enum nbr_action	action;
	int		new_state;
} nbr_fsm_tbl[] = {
    /* current state	event that happened	action to take		resulting state */
    {NBR_STA_DOWN,	NBR_EVT_REQUEST_RCVD,	NBR_ACT_NOTHING,	NBR_STA_REQ_RCVD},
    {NBR_STA_DOWN,	NBR_EVT_RESPONSE_RCVD,	NBR_ACT_STRT_TIMER,	NBR_STA_ACTIVE},
    {NBR_STA_ACTIVE,	NBR_EVT_RESPONSE_RCVD,	NBR_ACT_RST_TIMER,	NBR_STA_ACTIVE},
    {NBR_STA_ACTIVE,	NBR_EVT_REQUEST_RCVD,	NBR_ACT_NOTHING,	NBR_STA_ACTIVE},
    {NBR_STA_ACTIVE,	NBR_EVT_TIMEOUT,	NBR_ACT_DEL,		NBR_STA_DOWN},
    {NBR_STA_REQ_RCVD,	NBR_EVT_RESPONSE_SENT,	NBR_ACT_DEL,		NBR_STA_DOWN},
    {NBR_STA_ACTIVE,	NBR_EVT_RESPONSE_SENT,	NBR_ACT_NOTHING,	NBR_STA_ACTIVE},
    {NBR_STA_ANY,	NBR_EVT_KILL_NBR,	NBR_ACT_DEL,		NBR_STA_DOWN},
    {-1,		NBR_EVT_NOTHING,	NBR_ACT_NOTHING,	0},
};

const char * const nbr_event_names[] = {
	"RESPONSE RCVD",
	"REQUEST RCVD",
	"RESPONSE SENT",
	"NBR TIMEOUT",
	"NBR KILL",
	"NOTHING"
};

const char * const nbr_action_names[] = {
	"START TIMER",
	"RESET TIMER",
	"DELETE NBR",
	"NOTHING"
};

int
nbr_fsm(struct nbr *nbr, enum nbr_event event)
{
	struct timeval	 now;
	int		 old_state;
	int		 new_state = 0;
	int		 i;

	old_state = nbr->state;
	for (i = 0; nbr_fsm_tbl[i].state != -1; i++)
		if ((nbr_fsm_tbl[i].state & old_state) &&
		    (nbr_fsm_tbl[i].event == event)) {
			new_state = nbr_fsm_tbl[i].new_state;
			break;
		}

	if (nbr_fsm_tbl[i].state == -1) {
		/* event outside of the defined fsm, ignore it. */
		log_warnx("nbr_fsm: neighbor ID %s, "
		    "event '%s' not expected in state '%s'",
		    inet_ntoa(nbr->id), nbr_event_name(event),
		    nbr_state_name(old_state));
		return (0);
	}

	switch (nbr_fsm_tbl[i].action) {
	case NBR_ACT_RST_TIMER:
		nbr_set_timer(nbr);
		break;
	case NBR_ACT_STRT_TIMER:
		nbr_set_timer(nbr);
		break;
	case NBR_ACT_DEL:
		nbr_act_del(nbr);
		break;
	case NBR_ACT_NOTHING:
		/* do nothing */
		break;
	}

	if (new_state != 0)
		nbr->state = new_state;

	if (old_state != nbr->state) {
		/* neighbor changed from/to ACTIVE */
		gettimeofday(&now, NULL);
		nbr->uptime = now.tv_sec;

		log_debug("nbr_fsm: event '%s' resulted in action '%s' and "
		    "changing state for neighbor ID %s from '%s' to '%s'",
		    nbr_event_name(event),
		    nbr_action_name(nbr_fsm_tbl[i].action),
		    inet_ntoa(nbr->id), nbr_state_name(old_state),
		    nbr_state_name(nbr->state));
	}

	return (0);
}

void
nbr_init(u_int32_t hashsize)
{
	u_int32_t	 hs, i;

	for (hs = 1; hs < hashsize; hs <<= 1)
		;
	nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head));
	if (nbrtable.hashtbl == NULL)
		fatal("nbr_init");

	for (i = 0; i < hs; i++)
		LIST_INIT(&nbrtable.hashtbl[i]);

	nbrtable.hashmask = hs - 1;
}

struct nbr *
nbr_new(u_int32_t nbr_id, struct iface *iface)
{
	struct nbr_head	*head;
	struct nbr	*nbr = NULL;

	if ((nbr = calloc(1, sizeof(*nbr))) == NULL)
		fatal("nbr_new");

	nbr->state = NBR_STA_DOWN;
	nbr->id.s_addr = nbr_id;

	/* get next unused peerid */
	while (nbr_find_peerid(++peercnt))
		;
	nbr->peerid = peercnt;
	head = NBR_HASH(nbr->peerid);
	LIST_INSERT_HEAD(head, nbr, hash);

	/* add to peer list */
	nbr->iface = iface;
	LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry);

	TAILQ_INIT(&nbr->rp_list);
	TAILQ_INIT(&nbr->rq_list);

	/* set event structures */
	evtimer_set(&nbr->timeout_timer, nbr_timeout_timer, nbr);

	log_debug("nbr_new: neighbor ID %s, peerid %u",
	    inet_ntoa(nbr->id), nbr->peerid);

	return (nbr);
}

void
nbr_del(struct nbr *nbr)
{
	log_debug("nbr_del: neighbor ID %s, peerid %u", inet_ntoa(nbr->id),
	    nbr->peerid);

	/* stop timer */
	nbr_stop_timer(nbr);

	LIST_REMOVE(nbr, entry);
	LIST_REMOVE(nbr, hash);

	free(nbr);
}

void
nbr_act_del(struct nbr *nbr)
{
	/* If there is no authentication or it is just a route request
	 * there is no need to keep track of the failed neighbors */
	if (nbr->iface->auth_type == AUTH_CRYPT &&
	    nbr->state != NBR_STA_REQ_RCVD)
		nbr_failed_new(nbr);

	log_debug("nbr_act_del: neighbor ID %s, peerid %u", inet_ntoa(nbr->id),
	    nbr->peerid);

	/* schedule kill timer */
	nbr_set_timer(nbr);

	/* clear lists */
	clear_list(&nbr->rq_list);
	clear_list(&nbr->rp_list);
}

struct nbr *
nbr_find_peerid(u_int32_t peerid)
{
	struct nbr_head	*head;
	struct nbr	*nbr;

	head = NBR_HASH(peerid);

	LIST_FOREACH(nbr, head, hash) {
		if (nbr->peerid == peerid)
			return (nbr);
	}

	return (NULL);
}

struct nbr *
nbr_find_ip(struct iface *iface, u_int32_t src_ip)
{
	struct nbr	*nbr = NULL;

	LIST_FOREACH(nbr, &iface->nbr_list, entry) {
		if (nbr->id.s_addr == src_ip) {
			return (nbr);
		}
	}

	return (NULL);
}

/* failed nbr handling */
void
nbr_failed_new(struct nbr *nbr)
{
	struct timeval		 tv;
	struct iface		*iface;
	struct nbr_failed	*nbr_failed;

	if ((nbr_failed = calloc(1, sizeof(*nbr_failed))) == NULL)
		fatal("nbr_failed_new");

	nbr_failed->addr = nbr->addr;
	nbr_failed->auth_seq_num = nbr->auth_seq_num;
	iface = nbr->iface;

	timerclear(&tv);
	tv.tv_sec = FAILED_NBR_TIMEOUT;

	evtimer_set(&nbr_failed->timeout_timer, nbr_failed_timeout,
	    nbr_failed);

	if (evtimer_add(&nbr_failed->timeout_timer, &tv) == -1)
		fatal("nbr_failed_new");

	LIST_INSERT_HEAD(&iface->failed_nbr_list, nbr_failed, entry);
}

struct nbr_failed *
nbr_failed_find(struct iface *iface, u_int32_t src_ip)
{
	struct nbr_failed	*nbr_failed = NULL;

	LIST_FOREACH(nbr_failed, &iface->failed_nbr_list, entry) {
		if (nbr_failed->addr.s_addr == src_ip) {
			return (nbr_failed);
		}
	}

	return (NULL);
}

void
nbr_failed_delete(struct nbr_failed *nbr_failed)
{
	if (evtimer_pending(&nbr_failed->timeout_timer, NULL))
		if (evtimer_del(&nbr_failed->timeout_timer) == -1)
			fatal("nbr_failed_delete");

	LIST_REMOVE(nbr_failed, entry);
	free(nbr_failed);
}

/* timers */
/* ARGSUSED */
void
nbr_timeout_timer(int fd, short event, void *arg)
{
	struct nbr *nbr = arg;

	if (nbr->state == NBR_STA_DOWN)
		nbr_del(nbr);
	else
		nbr_fsm(nbr, NBR_EVT_TIMEOUT);
}

/* ARGSUSED */
void
nbr_failed_timeout(int fd, short event, void *arg)
{
	struct nbr_failed	*nbr_failed = arg;

	log_debug("nbr_failed_timeout: failed neighbor ID %s deleted",
	    inet_ntoa(nbr_failed->addr));

	nbr_failed_delete(nbr_failed);
}

/* actions */
void
nbr_set_timer(struct nbr *nbr)
{
	struct timeval	tv;

	timerclear(&tv);
	tv.tv_sec = NBR_TIMEOUT;

	if (evtimer_add(&nbr->timeout_timer, &tv) == -1)
		fatal("nbr_set_timer");
}

void
nbr_stop_timer(struct nbr *nbr)
{
	if (evtimer_del(&nbr->timeout_timer) == -1)
		fatal("nbr_stop_timer");
}

/* names */
const char *
nbr_event_name(int event)
{
	return (nbr_event_names[event]);
}

const char *
nbr_action_name(int action)
{
	return (nbr_action_names[action]);
}

struct ctl_nbr *
nbr_to_ctl(struct nbr *nbr)
{
	static struct ctl_nbr	 nctl;
	struct timeval		 tv, now, res;

	memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name));
	memcpy(&nctl.id, &nbr->id, sizeof(nctl.id));
	memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr));

	nctl.nbr_state = nbr->state;
	nctl.iface_state = nbr->iface->state;

	gettimeofday(&now, NULL);
	if (evtimer_pending(&nbr->timeout_timer, &tv)) {
		timersub(&tv, &now, &res);
		if (nbr->state & NBR_STA_DOWN)
			nctl.dead_timer = NBR_TIMEOUT - res.tv_sec;
		else
			nctl.dead_timer = res.tv_sec;
	} else
		nctl.dead_timer = 0;

	if (nbr->state == NBR_STA_ACTIVE) {
		nctl.uptime = now.tv_sec - nbr->uptime;
	} else
		nctl.uptime = 0;

	return (&nctl);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: neighbor.c,v 1.11 2017/01/17 16:30:54 jca Exp $ */
2
3			/*
4			* Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
5			* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
6			* Copyright (c) 2004, 2005, 2006 Esben Norby <norby@openbsd.org>
7			*
8			* Permission to use, copy, modify, and distribute this software for any
9			* purpose with or without fee is hereby granted, provided that the above
10			* copyright notice and this permission notice appear in all copies.
11			*
12			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19			*/
20
21			#include <sys/types.h>
22			#include <sys/ioctl.h>
23			#include <sys/time.h>
24			#include <sys/socket.h>
25			#include <netinet/in.h>
26			#include <arpa/inet.h>
27			#include <net/if.h>
28
29			#include <ctype.h>
30			#include <err.h>
31			#include <stdio.h>
32			#include <stdlib.h>
33			#include <string.h>
34			#include <event.h>
35
36			#include "ripd.h"
37			#include "rip.h"
38			#include "ripe.h"
39			#include "log.h"
40			#include "rde.h"
41
42			void nbr_set_timer(struct nbr *);
43			void nbr_stop_timer(struct nbr *);
44
45			void nbr_failed_new(struct nbr *);
46			void nbr_failed_timeout(int, short, void *);
47
48			LIST_HEAD(nbr_head, nbr);
49
50			struct nbr_table {
51			struct nbr_head *hashtbl;
52			u_int32_t hashmask;
53			} nbrtable;
54
55			#define NBR_HASH(x) \
56			&nbrtable.hashtbl[(x) & nbrtable.hashmask]
57
58			u_int32_t peercnt = NBR_CNTSTART;
59
60			struct {
61			int state;
62			enum nbr_event event;
63			enum nbr_action action;
64			int new_state;
65			} nbr_fsm_tbl[] = {
66			/* current state event that happened action to take resulting state */
67			{NBR_STA_DOWN, NBR_EVT_REQUEST_RCVD, NBR_ACT_NOTHING, NBR_STA_REQ_RCVD},
68			{NBR_STA_DOWN, NBR_EVT_RESPONSE_RCVD, NBR_ACT_STRT_TIMER, NBR_STA_ACTIVE},
69			{NBR_STA_ACTIVE, NBR_EVT_RESPONSE_RCVD, NBR_ACT_RST_TIMER, NBR_STA_ACTIVE},
70			{NBR_STA_ACTIVE, NBR_EVT_REQUEST_RCVD, NBR_ACT_NOTHING, NBR_STA_ACTIVE},
71			{NBR_STA_ACTIVE, NBR_EVT_TIMEOUT, NBR_ACT_DEL, NBR_STA_DOWN},
72			{NBR_STA_REQ_RCVD, NBR_EVT_RESPONSE_SENT, NBR_ACT_DEL, NBR_STA_DOWN},
73			{NBR_STA_ACTIVE, NBR_EVT_RESPONSE_SENT, NBR_ACT_NOTHING, NBR_STA_ACTIVE},
74			{NBR_STA_ANY, NBR_EVT_KILL_NBR, NBR_ACT_DEL, NBR_STA_DOWN},
75			{-1, NBR_EVT_NOTHING, NBR_ACT_NOTHING, 0},
76			};
77
78			const char * const nbr_event_names[] = {
79			"RESPONSE RCVD",
80			"REQUEST RCVD",
81			"RESPONSE SENT",
82			"NBR TIMEOUT",
83			"NBR KILL",
84			"NOTHING"
85			};
86
87			const char * const nbr_action_names[] = {
88			"START TIMER",
89			"RESET TIMER",
90			"DELETE NBR",
91			"NOTHING"
92			};
93
94			int
95			nbr_fsm(struct nbr *nbr, enum nbr_event event)
96			{
97			struct timeval now;
98			int old_state;
99			int new_state = 0;
100			int i;
101
102			old_state = nbr->state;
103			for (i = 0; nbr_fsm_tbl[i].state != -1; i++)
104			if ((nbr_fsm_tbl[i].state & old_state) &&
105			(nbr_fsm_tbl[i].event == event)) {
106			new_state = nbr_fsm_tbl[i].new_state;
107			break;
108			}
109
110			if (nbr_fsm_tbl[i].state == -1) {
111			/* event outside of the defined fsm, ignore it. */
112			log_warnx("nbr_fsm: neighbor ID %s, "
113			"event '%s' not expected in state '%s'",
114			inet_ntoa(nbr->id), nbr_event_name(event),
115			nbr_state_name(old_state));
116			return (0);
117			}
118
119			switch (nbr_fsm_tbl[i].action) {
120			case NBR_ACT_RST_TIMER:
121			nbr_set_timer(nbr);
122			break;
123			case NBR_ACT_STRT_TIMER:
124			nbr_set_timer(nbr);
125			break;
126			case NBR_ACT_DEL:
127			nbr_act_del(nbr);
128			break;
129			case NBR_ACT_NOTHING:
130			/* do nothing */
131			break;
132			}
133
134			if (new_state != 0)
135			nbr->state = new_state;
136
137			if (old_state != nbr->state) {
138			/* neighbor changed from/to ACTIVE */
139			gettimeofday(&now, NULL);
140			nbr->uptime = now.tv_sec;
141
142			log_debug("nbr_fsm: event '%s' resulted in action '%s' and "
143			"changing state for neighbor ID %s from '%s' to '%s'",
144			nbr_event_name(event),
145			nbr_action_name(nbr_fsm_tbl[i].action),
146			inet_ntoa(nbr->id), nbr_state_name(old_state),
147			nbr_state_name(nbr->state));
148			}
149
150			return (0);
151			}
152
153			void
154			nbr_init(u_int32_t hashsize)
155			{
156			u_int32_t hs, i;
157
158			for (hs = 1; hs < hashsize; hs <<= 1)
159			;
160			nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head));
161			if (nbrtable.hashtbl == NULL)
162			fatal("nbr_init");
163
164			for (i = 0; i < hs; i++)
165			LIST_INIT(&nbrtable.hashtbl[i]);
166
167			nbrtable.hashmask = hs - 1;
168			}
169
170			struct nbr *
171			nbr_new(u_int32_t nbr_id, struct iface *iface)
172			{
173			struct nbr_head *head;
174			struct nbr *nbr = NULL;
175
176			if ((nbr = calloc(1, sizeof(*nbr))) == NULL)
177			fatal("nbr_new");
178
179			nbr->state = NBR_STA_DOWN;
180			nbr->id.s_addr = nbr_id;
181
182			/* get next unused peerid */
183			while (nbr_find_peerid(++peercnt))
184			;
185			nbr->peerid = peercnt;
186			head = NBR_HASH(nbr->peerid);
187			LIST_INSERT_HEAD(head, nbr, hash);
188
189			/* add to peer list */
190			nbr->iface = iface;
191			LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry);
192
193			TAILQ_INIT(&nbr->rp_list);
194			TAILQ_INIT(&nbr->rq_list);
195
196			/* set event structures */
197			evtimer_set(&nbr->timeout_timer, nbr_timeout_timer, nbr);
198
199			log_debug("nbr_new: neighbor ID %s, peerid %u",
200			inet_ntoa(nbr->id), nbr->peerid);
201
202			return (nbr);
203			}
204
205			void
206			nbr_del(struct nbr *nbr)
207			{
208			log_debug("nbr_del: neighbor ID %s, peerid %u", inet_ntoa(nbr->id),
209			nbr->peerid);
210
211			/* stop timer */
212			nbr_stop_timer(nbr);
213
214			LIST_REMOVE(nbr, entry);
215			LIST_REMOVE(nbr, hash);
216
217			free(nbr);
218			}
219
220			void
221			nbr_act_del(struct nbr *nbr)
222			{
223			/* If there is no authentication or it is just a route request
224			* there is no need to keep track of the failed neighbors */
225			if (nbr->iface->auth_type == AUTH_CRYPT &&
226			nbr->state != NBR_STA_REQ_RCVD)
227			nbr_failed_new(nbr);
228
229			log_debug("nbr_act_del: neighbor ID %s, peerid %u", inet_ntoa(nbr->id),
230			nbr->peerid);
231
232			/* schedule kill timer */
233			nbr_set_timer(nbr);
234
235			/* clear lists */
236			clear_list(&nbr->rq_list);
237			clear_list(&nbr->rp_list);
238			}
239
240			struct nbr *
241			nbr_find_peerid(u_int32_t peerid)
242			{
243			struct nbr_head *head;
244			struct nbr *nbr;
245
246			head = NBR_HASH(peerid);
247
248			LIST_FOREACH(nbr, head, hash) {
249			if (nbr->peerid == peerid)
250			return (nbr);
251			}
252
253			return (NULL);
254			}
255
256			struct nbr *
257			nbr_find_ip(struct iface *iface, u_int32_t src_ip)
258			{
259			struct nbr *nbr = NULL;
260
261			LIST_FOREACH(nbr, &iface->nbr_list, entry) {
262			if (nbr->id.s_addr == src_ip) {
263			return (nbr);
264			}
265			}
266
267			return (NULL);
268			}
269
270			/* failed nbr handling */
271			void
272			nbr_failed_new(struct nbr *nbr)
273			{
274			struct timeval tv;
275			struct iface *iface;
276			struct nbr_failed *nbr_failed;
277
278			if ((nbr_failed = calloc(1, sizeof(*nbr_failed))) == NULL)
279			fatal("nbr_failed_new");
280
281			nbr_failed->addr = nbr->addr;
282			nbr_failed->auth_seq_num = nbr->auth_seq_num;
283			iface = nbr->iface;
284
285			timerclear(&tv);
286			tv.tv_sec = FAILED_NBR_TIMEOUT;
287
288			evtimer_set(&nbr_failed->timeout_timer, nbr_failed_timeout,
289			nbr_failed);
290
291			if (evtimer_add(&nbr_failed->timeout_timer, &tv) == -1)
292			fatal("nbr_failed_new");
293
294			LIST_INSERT_HEAD(&iface->failed_nbr_list, nbr_failed, entry);
295			}
296
297			struct nbr_failed *
298			nbr_failed_find(struct iface *iface, u_int32_t src_ip)
299			{
300			struct nbr_failed *nbr_failed = NULL;
301
302			LIST_FOREACH(nbr_failed, &iface->failed_nbr_list, entry) {
303			if (nbr_failed->addr.s_addr == src_ip) {
304			return (nbr_failed);
305			}
306			}
307
308			return (NULL);
309			}
310
311			void
312			nbr_failed_delete(struct nbr_failed *nbr_failed)
313			{
314			if (evtimer_pending(&nbr_failed->timeout_timer, NULL))
315			if (evtimer_del(&nbr_failed->timeout_timer) == -1)
316			fatal("nbr_failed_delete");
317
318			LIST_REMOVE(nbr_failed, entry);
319			free(nbr_failed);
320			}
321
322			/* timers */
323			/* ARGSUSED */
324			void
325			nbr_timeout_timer(int fd, short event, void *arg)
326			{
327			struct nbr *nbr = arg;
328
329			if (nbr->state == NBR_STA_DOWN)
330			nbr_del(nbr);
331			else
332			nbr_fsm(nbr, NBR_EVT_TIMEOUT);
333			}
334
335			/* ARGSUSED */
336			void
337			nbr_failed_timeout(int fd, short event, void *arg)
338			{
339			struct nbr_failed *nbr_failed = arg;
340
341			log_debug("nbr_failed_timeout: failed neighbor ID %s deleted",
342			inet_ntoa(nbr_failed->addr));
343
344			nbr_failed_delete(nbr_failed);
345			}
346
347			/* actions */
348			void
349			nbr_set_timer(struct nbr *nbr)
350			{
351			struct timeval tv;
352
353			timerclear(&tv);
354			tv.tv_sec = NBR_TIMEOUT;
355
356			if (evtimer_add(&nbr->timeout_timer, &tv) == -1)
357			fatal("nbr_set_timer");
358			}
359
360			void
361			nbr_stop_timer(struct nbr *nbr)
362			{
363			if (evtimer_del(&nbr->timeout_timer) == -1)
364			fatal("nbr_stop_timer");
365			}
366
367			/* names */
368			const char *
369			nbr_event_name(int event)
370			{
371			return (nbr_event_names[event]);
372			}
373
374			const char *
375			nbr_action_name(int action)
376			{
377			return (nbr_action_names[action]);
378			}
379
380			struct ctl_nbr *
381			nbr_to_ctl(struct nbr *nbr)
382			{
383			static struct ctl_nbr nctl;
384			struct timeval tv, now, res;
385
386			memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name));
387			memcpy(&nctl.id, &nbr->id, sizeof(nctl.id));
388			memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr));
389
390			nctl.nbr_state = nbr->state;
391			nctl.iface_state = nbr->iface->state;
392
393			gettimeofday(&now, NULL);
394			if (evtimer_pending(&nbr->timeout_timer, &tv)) {
395			timersub(&tv, &now, &res);
396			if (nbr->state & NBR_STA_DOWN)
397			nctl.dead_timer = NBR_TIMEOUT - res.tv_sec;
398			else
399			nctl.dead_timer = res.tv_sec;
400			} else
401			nctl.dead_timer = 0;
402
403			if (nbr->state == NBR_STA_ACTIVE) {
404			nctl.uptime = now.tv_sec - nbr->uptime;
405			} else
406			nctl.uptime = 0;
407
408			return (&nctl);
409			}