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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ospf6d/neighbor.c	Lines:	0	284	0.0 %
Date:	2017-11-13	Branches:	0	152	0.0 %


/*	$OpenBSD: neighbor.c,v 1.13 2013/03/25 14:29:35 markus Exp $ */

/*
 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2004, 2005, 2007 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 "ospf6d.h"
#include "ospf6.h"
#include "ospfe.h"
#include "log.h"
#include "rde.h"

int	 nbr_adj_ok(struct nbr *);

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; /* 0 means action decides or unchanged */
} nbr_fsm_tbl[] = {
    /* current state	event that happened	action to take		resulting state */
    {NBR_STA_ACTIVE,	NBR_EVT_HELLO_RCVD,	NBR_ACT_RST_ITIMER,	0},
    {NBR_STA_BIDIR,	NBR_EVT_2_WAY_RCVD,	NBR_ACT_NOTHING,	0},
    {NBR_STA_INIT,	NBR_EVT_1_WAY_RCVD,	NBR_ACT_NOTHING,	0},
    {NBR_STA_DOWN,	NBR_EVT_HELLO_RCVD,	NBR_ACT_STRT_ITIMER,	NBR_STA_INIT},
    {NBR_STA_ATTEMPT,	NBR_EVT_HELLO_RCVD,	NBR_ACT_RST_ITIMER,	NBR_STA_INIT},
    {NBR_STA_INIT,	NBR_EVT_2_WAY_RCVD,	NBR_ACT_EVAL,		0},
    {NBR_STA_XSTRT,	NBR_EVT_NEG_DONE,	NBR_ACT_SNAP,		0},
    {NBR_STA_SNAP,	NBR_EVT_SNAP_DONE,	NBR_ACT_SNAP_DONE,	NBR_STA_XCHNG},
    {NBR_STA_XCHNG,	NBR_EVT_XCHNG_DONE,	NBR_ACT_XCHNG_DONE,	0},
    {NBR_STA_LOAD,	NBR_EVT_LOAD_DONE,	NBR_ACT_NOTHING,	NBR_STA_FULL},
    {NBR_STA_2_WAY,	NBR_EVT_ADJ_OK,		NBR_ACT_EVAL,		0},
    {NBR_STA_ADJFORM,	NBR_EVT_ADJ_OK,		NBR_ACT_ADJ_OK,		0},
    {NBR_STA_PRELIM,	NBR_EVT_ADJ_OK,		NBR_ACT_HELLO_CHK,	0},
    {NBR_STA_ADJFORM,	NBR_EVT_ADJTMOUT,	NBR_ACT_RESTRT_DD,	0},
    {NBR_STA_FLOOD,	NBR_EVT_SEQ_NUM_MIS,	NBR_ACT_RESTRT_DD,	0},
    {NBR_STA_FLOOD,	NBR_EVT_BAD_LS_REQ,	NBR_ACT_RESTRT_DD,	0},
    {NBR_STA_ANY,	NBR_EVT_KILL_NBR,	NBR_ACT_DEL,		NBR_STA_DOWN},
    {NBR_STA_ANY,	NBR_EVT_LL_DOWN,	NBR_ACT_DEL,		NBR_STA_DOWN},
    {NBR_STA_ANY,	NBR_EVT_ITIMER,		NBR_ACT_DEL,		NBR_STA_DOWN},
    {NBR_STA_BIDIR,	NBR_EVT_1_WAY_RCVD,	NBR_ACT_CLR_LST,	NBR_STA_INIT},
    {-1,		NBR_EVT_NOTHING,	NBR_ACT_NOTHING,	0},
};

const char * const nbr_event_names[] = {
	"NOTHING",
	"HELLO_RECEIVED",
	"2_WAY_RECEIVED",
	"NEGOTIATION_DONE",
	"SNAPSHOT_DONE",
	"EXCHANGE_DONE",
	"BAD_LS_REQ",
	"LOADING_DONE",
	"ADJ_OK",
	"SEQ_NUM_MISMATCH",
	"1_WAY_RECEIVED",
	"KILL_NBR",
	"INACTIVITY_TIMER",
	"LL_DOWN",
	"ADJ_TIMEOUT"
};

const char * const nbr_action_names[] = {
	"NOTHING",
	"RESET_INACTIVITY_TIMER",
	"START_INACTIVITY_TIMER",
	"EVAL",
	"SNAPSHOT",
	"SNAPSHOT_DONE",
	"EXCHANGE_DONE",
	"ADJ_OK",
	"RESET_DD",
	"DELETE",
	"CLEAR_LISTS",
	"HELLO_CHK"
};

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

	if (nbr == nbr->iface->self)
		return (0);

	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_names[event],
		    nbr_state_name(old_state));
		return (0);
	}

	switch (nbr_fsm_tbl[i].action) {
	case NBR_ACT_RST_ITIMER:
		ret = nbr_act_reset_itimer(nbr);
		break;
	case NBR_ACT_STRT_ITIMER:
		ret = nbr_act_start_itimer(nbr);
		break;
	case NBR_ACT_EVAL:
		ret = nbr_act_eval(nbr);
		break;
	case NBR_ACT_SNAP:
		ret = nbr_act_snapshot(nbr);
		break;
	case NBR_ACT_SNAP_DONE:
		/* start db exchange */
		start_db_tx_timer(nbr);
		break;
	case NBR_ACT_XCHNG_DONE:
		ret = nbr_act_exchange_done(nbr);
		break;
	case NBR_ACT_ADJ_OK:
		ret = nbr_act_adj_ok(nbr);
		break;
	case NBR_ACT_RESTRT_DD:
		ret = nbr_act_restart_dd(nbr);
		break;
	case NBR_ACT_DEL:
		ret = nbr_act_delete(nbr);
		break;
	case NBR_ACT_CLR_LST:
		ret = nbr_act_clear_lists(nbr);
		break;
	case NBR_ACT_HELLO_CHK:
		ret = nbr_act_hello_check(nbr);
		break;
	case NBR_ACT_NOTHING:
		/* do nothing */
		break;
	}

	if (ret) {
		log_warnx("nbr_fsm: error changing state for neighbor ID %s, "
		    "event %s, state %s", inet_ntoa(nbr->id),
		    nbr_event_names[event], nbr_state_name(old_state));
		return (-1);
	}

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

	if (old_state != nbr->state) {
		nbr->stats.sta_chng++;

		if (old_state & NBR_STA_FULL || nbr->state & NBR_STA_FULL) {
			extern struct ospfd_conf        *oeconf; /* XXX */
			/*
			 * neighbor changed from/to FULL
			 * originate new rtr and net LSA
			 */
			area_track(area_find(oeconf, nbr->iface->area_id),
			    nbr->state);
			orig_rtr_lsa(nbr->iface);
			if (nbr->iface->state & IF_STA_DR)
				orig_net_lsa(nbr->iface);

			gettimeofday(&now, NULL);
			nbr->uptime = now.tv_sec;
		}

		/* state change inform RDE */
		ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE,
		    nbr->peerid, 0, &nbr->state, sizeof(nbr->state));

		/* bidirectional communication lost */
		if (old_state & ~NBR_STA_PRELIM && nbr->state & NBR_STA_PRELIM)
			if_fsm(nbr->iface, IF_EVT_NBR_CHNG);

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

		if (nbr->iface->type == IF_TYPE_VIRTUALLINK) {
			orig_rtr_lsa(nbr->iface);
		}
	}

	return (ret);
}

void
nbr_init(u_int32_t hashsize)
{
	struct nbr_head	*head;
	struct nbr	*nbr;
	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;

	/* allocate a dummy neighbor used for self originated AS ext routes */
	if ((nbr = calloc(1, sizeof(*nbr))) == NULL)
		fatal("nbr_init");

	nbr->id.s_addr = ospfe_router_id();
	nbr->state = NBR_STA_DOWN;
	nbr->peerid = NBR_IDSELF;
	head = NBR_HASH(nbr->peerid);
	LIST_INSERT_HEAD(head, nbr, hash);

	TAILQ_INIT(&nbr->ls_retrans_list);
	TAILQ_INIT(&nbr->db_sum_list);
	TAILQ_INIT(&nbr->ls_req_list);
}

struct nbr *
nbr_new(u_int32_t nbr_id, struct iface *iface, u_int32_t iface_id, int self,
	struct in6_addr *addr)
{
	struct nbr_head	*head;
	struct nbr	*nbr;
	struct rde_nbr	 rn;

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

	nbr->state = NBR_STA_DOWN;
	nbr->dd_master = 1;
	nbr->dd_seq_num = arc4random();	/* RFC: some unique value */
	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;
	nbr->iface_id = iface_id;
	LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry);

	TAILQ_INIT(&nbr->ls_retrans_list);
	TAILQ_INIT(&nbr->db_sum_list);
	TAILQ_INIT(&nbr->ls_req_list);

	nbr->ls_req = NULL;

	if (self) {
		nbr->state = NBR_STA_FULL;
		nbr->addr = iface->addr;
		nbr->priority = iface->priority;
	}

	/* set event structures */
	evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr);
	evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr);
	evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr);
	evtimer_set(&nbr->ls_retrans_timer, ls_retrans_timer, nbr);
	evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr);

	bzero(&rn, sizeof(rn));
	if (addr)
		rn.addr = *addr;
	rn.id.s_addr = nbr->id.s_addr;
	rn.area_id.s_addr = nbr->iface->area_id.s_addr;
	rn.ifindex = nbr->iface->ifindex;
	rn.iface_id = nbr->iface_id;
	rn.state = nbr->state;
	rn.self = self;
	ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn,
	    sizeof(rn));

	return (nbr);
}

void
nbr_del(struct nbr *nbr)
{
	ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0);

	if (evtimer_pending(&nbr->inactivity_timer, NULL))
		evtimer_del(&nbr->inactivity_timer);
	if (evtimer_pending(&nbr->db_tx_timer, NULL))
		evtimer_del(&nbr->db_tx_timer);
	if (evtimer_pending(&nbr->lsreq_tx_timer, NULL))
		evtimer_del(&nbr->lsreq_tx_timer);
	if (evtimer_pending(&nbr->ls_retrans_timer, NULL))
		evtimer_del(&nbr->ls_retrans_timer);
	if (evtimer_pending(&nbr->adj_timer, NULL))
		evtimer_del(&nbr->adj_timer);

	/* clear lists */
	ls_retrans_list_clr(nbr);
	db_sum_list_clr(nbr);
	ls_req_list_clr(nbr);

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

	free(nbr);
}

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_id(struct iface *iface, u_int32_t rtr_id)
{
	struct nbr	*nbr = NULL;

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

	return (NULL);
}

/* timers */
/* ARGSUSED */
void
nbr_itimer(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_ITIMER);
}

void
nbr_start_itimer(struct nbr *nbr)
{
	struct timeval	tv;

	timerclear(&tv);
	tv.tv_sec = nbr->iface->dead_interval;

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

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

void
nbr_reset_itimer(struct nbr *nbr)
{
	struct timeval	tv;

	timerclear(&tv);
	tv.tv_sec = nbr->iface->dead_interval;

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

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

	if (!(nbr->state & NBR_STA_ADJFORM))
		return;

	if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) {
		log_warnx("nbr_adj_timer: failed to form adjacency with %s",
		    inet_ntoa(nbr->id));
		nbr_fsm(nbr, NBR_EVT_ADJTMOUT);
	}
}

void
nbr_start_adj_timer(struct nbr *nbr)
{
	struct timeval	tv;

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

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

/* actions */
int
nbr_act_reset_itimer(struct nbr *nbr)
{
	nbr_reset_itimer(nbr);

	return (0);
}

int
nbr_act_start_itimer(struct nbr *nbr)
{
	nbr_start_itimer(nbr);

	return (0);
}

int
nbr_adj_ok(struct nbr *nbr)
{
	struct iface	*iface = nbr->iface;

	switch (iface->type) {
	case IF_TYPE_POINTOPOINT:
	case IF_TYPE_VIRTUALLINK:
	case IF_TYPE_POINTOMULTIPOINT:
		/* always ok */
		break;
	case IF_TYPE_BROADCAST:
	case IF_TYPE_NBMA:
		/*
		 * if neighbor is dr, bdr or router self is dr or bdr
		 * start forming adjacency
		 */
		if (iface->dr == nbr || iface->bdr == nbr ||
		    iface->state & IF_STA_DRORBDR)
			break;
		return (0);
	default:
		fatalx("nbr_adj_ok: unknown interface type");
	}
	return (1);
}

int
nbr_act_eval(struct nbr *nbr)
{
	if (!nbr_adj_ok(nbr)) {
		nbr->state = NBR_STA_2_WAY;
		return (0);
	}

	nbr->state = NBR_STA_XSTRT;
	nbr->dd_master = 1;
	nbr->dd_seq_num++;	/* as per RFC */
	nbr->dd_pending = 0;
	/* initial db negotiation */
	start_db_tx_timer(nbr);

	nbr_start_adj_timer(nbr);

	return (0);
}

int
nbr_act_snapshot(struct nbr *nbr)
{
	stop_db_tx_timer(nbr);

	/* we need to wait for the old snapshot to finish */
	if (nbr->dd_snapshot) {
		log_debug("nbr_act_snapshot: giving up, old snapshot running "
		    "for neigbor ID %s", inet_ntoa(nbr->id));
		return (nbr_act_restart_dd(nbr));
	}
	ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0);

	nbr->dd_snapshot = 1;	/* wait for IMSG_DB_END */
	nbr->state = NBR_STA_SNAP;

	return (0);
}

int
nbr_act_exchange_done(struct nbr *nbr)
{
	if (nbr->dd_master)
		stop_db_tx_timer(nbr);

	if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG &&
	    nbr->dd_pending == 0) {
		nbr->state = NBR_STA_FULL;
		return (0);
	}

	nbr->state = NBR_STA_LOAD;

	if (!ls_req_list_empty(nbr))
		start_ls_req_tx_timer(nbr);

	return (0);
}

int
nbr_act_adj_ok(struct nbr *nbr)
{
	if (nbr_adj_ok(nbr)) {
		if (nbr->state == NBR_STA_2_WAY)
			return (nbr_act_eval(nbr));
	} else {
		nbr->state = NBR_STA_2_WAY;
		return (nbr_act_clear_lists(nbr));
	}

	return (0);
}

int
nbr_act_restart_dd(struct nbr *nbr)
{
	nbr_act_clear_lists(nbr);

	if (!nbr_adj_ok(nbr)) {
		nbr->state = NBR_STA_2_WAY;
		return (0);
	}

	nbr->state = NBR_STA_XSTRT;
	nbr->dd_master = 1;
	nbr->dd_seq_num += arc4random() & 0xffff;
	nbr->dd_pending = 0;

	/* initial db negotiation */
	start_db_tx_timer(nbr);

	nbr_start_adj_timer(nbr);

	return (0);
}

int
nbr_act_delete(struct nbr *nbr)
{
	struct timeval	tv;

	if (nbr == nbr->iface->self)
		return (0);

	/* stop timers */
	nbr_stop_itimer(nbr);

	/* clear dr and bdr */
	nbr->dr.s_addr = 0;
	nbr->bdr.s_addr = 0;

	/* schedule kill timer */
	timerclear(&tv);
	tv.tv_sec = DEFAULT_NBR_TMOUT;

	if (evtimer_add(&nbr->inactivity_timer, &tv)) {
		log_warnx("nbr_act_delete: error scheduling neighbor ID %s "
		    "for removal", inet_ntoa(nbr->id));
	}

	return (nbr_act_clear_lists(nbr));
}

int
nbr_act_clear_lists(struct nbr *nbr)
{
	/* stop timers */
	stop_db_tx_timer(nbr);
	stop_ls_req_tx_timer(nbr);

	/* clear lists */
	ls_retrans_list_clr(nbr);
	db_sum_list_clr(nbr);
	ls_req_list_clr(nbr);

	return (0);
}

int
nbr_act_hello_check(struct nbr *nbr)
{
	log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id));

	return (-1);
}

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

	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));
	memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr));
	memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr));
	memcpy(&nctl.area, &nbr->iface->area_id, sizeof(nctl.area));

	/* this list is 99% of the time empty so that's OK for now */
	nctl.db_sum_lst_cnt = 0;
	TAILQ_FOREACH(le, &nbr->db_sum_list, entry)
		nctl.db_sum_lst_cnt++;

	nctl.ls_req_lst_cnt = nbr->ls_req_cnt;
	nctl.ls_retrans_lst_cnt = nbr->ls_ret_cnt;

	nctl.nbr_state = nbr->state;

	/*
	 * We need to trick a bit to show the remote iface state.
	 * The idea is to print DR, BDR or DROther dependent on
	 * the type of the neighbor.
	 */
	if (nbr->iface->dr == nbr)
		nctl.iface_state = IF_STA_DR;
	else if (nbr->iface->bdr == nbr)
		nctl.iface_state = IF_STA_BACKUP;
	else if (nbr->iface->state & IF_STA_MULTI)
		nctl.iface_state = IF_STA_DROTHER;
	else
		nctl.iface_state = nbr->iface->state;

	nctl.state_chng_cnt = nbr->stats.sta_chng;

	nctl.priority = nbr->priority;
	nctl.options = nbr->options;

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

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

	return (&nctl);
}

struct lsa_hdr *
lsa_hdr_new(void)
{
	struct lsa_hdr	*lsa_hdr = NULL;

	if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL)
		fatal("lsa_hdr_new");

	return (lsa_hdr);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: neighbor.c,v 1.13 2013/03/25 14:29:35 markus Exp $ */
2
3			/*
4			* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
5			* Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org>
6			*
7			* Permission to use, copy, modify, and distribute this software for any
8			* purpose with or without fee is hereby granted, provided that the above
9			* copyright notice and this permission notice appear in all copies.
10			*
11			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18			*/
19
20			#include <sys/types.h>
21			#include <sys/ioctl.h>
22			#include <sys/time.h>
23			#include <sys/socket.h>
24			#include <netinet/in.h>
25			#include <arpa/inet.h>
26			#include <net/if.h>
27
28			#include <ctype.h>
29			#include <err.h>
30			#include <stdio.h>
31			#include <stdlib.h>
32			#include <string.h>
33			#include <event.h>
34
35			#include "ospf6d.h"
36			#include "ospf6.h"
37			#include "ospfe.h"
38			#include "log.h"
39			#include "rde.h"
40
41			int nbr_adj_ok(struct nbr *);
42
43			LIST_HEAD(nbr_head, nbr);
44
45			struct nbr_table {
46			struct nbr_head *hashtbl;
47			u_int32_t hashmask;
48			} nbrtable;
49
50			#define NBR_HASH(x) \
51			&nbrtable.hashtbl[(x) & nbrtable.hashmask]
52
53			u_int32_t peercnt = NBR_CNTSTART;
54
55			struct {
56			int state;
57			enum nbr_event event;
58			enum nbr_action action;
59			int new_state; /* 0 means action decides or unchanged */
60			} nbr_fsm_tbl[] = {
61			/* current state event that happened action to take resulting state */
62			{NBR_STA_ACTIVE, NBR_EVT_HELLO_RCVD, NBR_ACT_RST_ITIMER, 0},
63			{NBR_STA_BIDIR, NBR_EVT_2_WAY_RCVD, NBR_ACT_NOTHING, 0},
64			{NBR_STA_INIT, NBR_EVT_1_WAY_RCVD, NBR_ACT_NOTHING, 0},
65			{NBR_STA_DOWN, NBR_EVT_HELLO_RCVD, NBR_ACT_STRT_ITIMER, NBR_STA_INIT},
66			{NBR_STA_ATTEMPT, NBR_EVT_HELLO_RCVD, NBR_ACT_RST_ITIMER, NBR_STA_INIT},
67			{NBR_STA_INIT, NBR_EVT_2_WAY_RCVD, NBR_ACT_EVAL, 0},
68			{NBR_STA_XSTRT, NBR_EVT_NEG_DONE, NBR_ACT_SNAP, 0},
69			{NBR_STA_SNAP, NBR_EVT_SNAP_DONE, NBR_ACT_SNAP_DONE, NBR_STA_XCHNG},
70			{NBR_STA_XCHNG, NBR_EVT_XCHNG_DONE, NBR_ACT_XCHNG_DONE, 0},
71			{NBR_STA_LOAD, NBR_EVT_LOAD_DONE, NBR_ACT_NOTHING, NBR_STA_FULL},
72			{NBR_STA_2_WAY, NBR_EVT_ADJ_OK, NBR_ACT_EVAL, 0},
73			{NBR_STA_ADJFORM, NBR_EVT_ADJ_OK, NBR_ACT_ADJ_OK, 0},
74			{NBR_STA_PRELIM, NBR_EVT_ADJ_OK, NBR_ACT_HELLO_CHK, 0},
75			{NBR_STA_ADJFORM, NBR_EVT_ADJTMOUT, NBR_ACT_RESTRT_DD, 0},
76			{NBR_STA_FLOOD, NBR_EVT_SEQ_NUM_MIS, NBR_ACT_RESTRT_DD, 0},
77			{NBR_STA_FLOOD, NBR_EVT_BAD_LS_REQ, NBR_ACT_RESTRT_DD, 0},
78			{NBR_STA_ANY, NBR_EVT_KILL_NBR, NBR_ACT_DEL, NBR_STA_DOWN},
79			{NBR_STA_ANY, NBR_EVT_LL_DOWN, NBR_ACT_DEL, NBR_STA_DOWN},
80			{NBR_STA_ANY, NBR_EVT_ITIMER, NBR_ACT_DEL, NBR_STA_DOWN},
81			{NBR_STA_BIDIR, NBR_EVT_1_WAY_RCVD, NBR_ACT_CLR_LST, NBR_STA_INIT},
82			{-1, NBR_EVT_NOTHING, NBR_ACT_NOTHING, 0},
83			};
84
85			const char * const nbr_event_names[] = {
86			"NOTHING",
87			"HELLO_RECEIVED",
88			"2_WAY_RECEIVED",
89			"NEGOTIATION_DONE",
90			"SNAPSHOT_DONE",
91			"EXCHANGE_DONE",
92			"BAD_LS_REQ",
93			"LOADING_DONE",
94			"ADJ_OK",
95			"SEQ_NUM_MISMATCH",
96			"1_WAY_RECEIVED",
97			"KILL_NBR",
98			"INACTIVITY_TIMER",
99			"LL_DOWN",
100			"ADJ_TIMEOUT"
101			};
102
103			const char * const nbr_action_names[] = {
104			"NOTHING",
105			"RESET_INACTIVITY_TIMER",
106			"START_INACTIVITY_TIMER",
107			"EVAL",
108			"SNAPSHOT",
109			"SNAPSHOT_DONE",
110			"EXCHANGE_DONE",
111			"ADJ_OK",
112			"RESET_DD",
113			"DELETE",
114			"CLEAR_LISTS",
115			"HELLO_CHK"
116			};
117
118			int
119			nbr_fsm(struct nbr *nbr, enum nbr_event event)
120			{
121			struct timeval now;
122			int old_state;
123			int new_state = 0;
124			int i, ret = 0;
125
126			if (nbr == nbr->iface->self)
127			return (0);
128
129			old_state = nbr->state;
130			for (i = 0; nbr_fsm_tbl[i].state != -1; i++)
131			if ((nbr_fsm_tbl[i].state & old_state) &&
132			(nbr_fsm_tbl[i].event == event)) {
133			new_state = nbr_fsm_tbl[i].new_state;
134			break;
135			}
136
137			if (nbr_fsm_tbl[i].state == -1) {
138			/* event outside of the defined fsm, ignore it. */
139			log_warnx("nbr_fsm: neighbor ID %s, "
140			"event %s not expected in state %s",
141			inet_ntoa(nbr->id), nbr_event_names[event],
142			nbr_state_name(old_state));
143			return (0);
144			}
145
146			switch (nbr_fsm_tbl[i].action) {
147			case NBR_ACT_RST_ITIMER:
148			ret = nbr_act_reset_itimer(nbr);
149			break;
150			case NBR_ACT_STRT_ITIMER:
151			ret = nbr_act_start_itimer(nbr);
152			break;
153			case NBR_ACT_EVAL:
154			ret = nbr_act_eval(nbr);
155			break;
156			case NBR_ACT_SNAP:
157			ret = nbr_act_snapshot(nbr);
158			break;
159			case NBR_ACT_SNAP_DONE:
160			/* start db exchange */
161			start_db_tx_timer(nbr);
162			break;
163			case NBR_ACT_XCHNG_DONE:
164			ret = nbr_act_exchange_done(nbr);
165			break;
166			case NBR_ACT_ADJ_OK:
167			ret = nbr_act_adj_ok(nbr);
168			break;
169			case NBR_ACT_RESTRT_DD:
170			ret = nbr_act_restart_dd(nbr);
171			break;
172			case NBR_ACT_DEL:
173			ret = nbr_act_delete(nbr);
174			break;
175			case NBR_ACT_CLR_LST:
176			ret = nbr_act_clear_lists(nbr);
177			break;
178			case NBR_ACT_HELLO_CHK:
179			ret = nbr_act_hello_check(nbr);
180			break;
181			case NBR_ACT_NOTHING:
182			/* do nothing */
183			break;
184			}
185
186			if (ret) {
187			log_warnx("nbr_fsm: error changing state for neighbor ID %s, "
188			"event %s, state %s", inet_ntoa(nbr->id),
189			nbr_event_names[event], nbr_state_name(old_state));
190			return (-1);
191			}
192
193			if (new_state != 0)
194			nbr->state = new_state;
195
196			if (old_state != nbr->state) {
197			nbr->stats.sta_chng++;
198
199			if (old_state & NBR_STA_FULL \|\| nbr->state & NBR_STA_FULL) {
200			extern struct ospfd_conf oeconf; / XXX */
201			/*
202			* neighbor changed from/to FULL
203			* originate new rtr and net LSA
204			*/
205			area_track(area_find(oeconf, nbr->iface->area_id),
206			nbr->state);
207			orig_rtr_lsa(nbr->iface);
208			if (nbr->iface->state & IF_STA_DR)
209			orig_net_lsa(nbr->iface);
210
211			gettimeofday(&now, NULL);
212			nbr->uptime = now.tv_sec;
213			}
214
215			/* state change inform RDE */
216			ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE,
217			nbr->peerid, 0, &nbr->state, sizeof(nbr->state));
218
219			/* bidirectional communication lost */
220			if (old_state & ~NBR_STA_PRELIM && nbr->state & NBR_STA_PRELIM)
221			if_fsm(nbr->iface, IF_EVT_NBR_CHNG);
222
223			log_debug("nbr_fsm: event %s resulted in action %s and "
224			"changing state for neighbor ID %s from %s to %s",
225			nbr_event_names[event],
226			nbr_action_names[nbr_fsm_tbl[i].action],
227			inet_ntoa(nbr->id), nbr_state_name(old_state),
228			nbr_state_name(nbr->state));
229
230			if (nbr->iface->type == IF_TYPE_VIRTUALLINK) {
231			orig_rtr_lsa(nbr->iface);
232			}
233			}
234
235			return (ret);
236			}
237
238			void
239			nbr_init(u_int32_t hashsize)
240			{
241			struct nbr_head *head;
242			struct nbr *nbr;
243			u_int32_t hs, i;
244
245			for (hs = 1; hs < hashsize; hs <<= 1)
246			;
247			nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head));
248			if (nbrtable.hashtbl == NULL)
249			fatal("nbr_init");
250
251			for (i = 0; i < hs; i++)
252			LIST_INIT(&nbrtable.hashtbl[i]);
253
254			nbrtable.hashmask = hs - 1;
255
256			/* allocate a dummy neighbor used for self originated AS ext routes */
257			if ((nbr = calloc(1, sizeof(*nbr))) == NULL)
258			fatal("nbr_init");
259
260			nbr->id.s_addr = ospfe_router_id();
261			nbr->state = NBR_STA_DOWN;
262			nbr->peerid = NBR_IDSELF;
263			head = NBR_HASH(nbr->peerid);
264			LIST_INSERT_HEAD(head, nbr, hash);
265
266			TAILQ_INIT(&nbr->ls_retrans_list);
267			TAILQ_INIT(&nbr->db_sum_list);
268			TAILQ_INIT(&nbr->ls_req_list);
269			}
270
271			struct nbr *
272			nbr_new(u_int32_t nbr_id, struct iface *iface, u_int32_t iface_id, int self,
273			struct in6_addr *addr)
274			{
275			struct nbr_head *head;
276			struct nbr *nbr;
277			struct rde_nbr rn;
278
279			if ((nbr = calloc(1, sizeof(*nbr))) == NULL)
280			fatal("nbr_new");
281
282			nbr->state = NBR_STA_DOWN;
283			nbr->dd_master = 1;
284			nbr->dd_seq_num = arc4random(); /* RFC: some unique value */
285			nbr->id.s_addr = nbr_id;
286
287			/* get next unused peerid */
288			while (nbr_find_peerid(++peercnt))
289			;
290			nbr->peerid = peercnt;
291			head = NBR_HASH(nbr->peerid);
292			LIST_INSERT_HEAD(head, nbr, hash);
293
294			/* add to peer list */
295			nbr->iface = iface;
296			nbr->iface_id = iface_id;
297			LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry);
298
299			TAILQ_INIT(&nbr->ls_retrans_list);
300			TAILQ_INIT(&nbr->db_sum_list);
301			TAILQ_INIT(&nbr->ls_req_list);
302
303			nbr->ls_req = NULL;
304
305			if (self) {
306			nbr->state = NBR_STA_FULL;
307			nbr->addr = iface->addr;
308			nbr->priority = iface->priority;
309			}
310
311			/* set event structures */
312			evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr);
313			evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr);
314			evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr);
315			evtimer_set(&nbr->ls_retrans_timer, ls_retrans_timer, nbr);
316			evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr);
317
318			bzero(&rn, sizeof(rn));
319			if (addr)
320			rn.addr = *addr;
321			rn.id.s_addr = nbr->id.s_addr;
322			rn.area_id.s_addr = nbr->iface->area_id.s_addr;
323			rn.ifindex = nbr->iface->ifindex;
324			rn.iface_id = nbr->iface_id;
325			rn.state = nbr->state;
326			rn.self = self;
327			ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn,
328			sizeof(rn));
329
330			return (nbr);
331			}
332
333			void
334			nbr_del(struct nbr *nbr)
335			{
336			ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0);
337
338			if (evtimer_pending(&nbr->inactivity_timer, NULL))
339			evtimer_del(&nbr->inactivity_timer);
340			if (evtimer_pending(&nbr->db_tx_timer, NULL))
341			evtimer_del(&nbr->db_tx_timer);
342			if (evtimer_pending(&nbr->lsreq_tx_timer, NULL))
343			evtimer_del(&nbr->lsreq_tx_timer);
344			if (evtimer_pending(&nbr->ls_retrans_timer, NULL))
345			evtimer_del(&nbr->ls_retrans_timer);
346			if (evtimer_pending(&nbr->adj_timer, NULL))
347			evtimer_del(&nbr->adj_timer);
348
349			/* clear lists */
350			ls_retrans_list_clr(nbr);
351			db_sum_list_clr(nbr);
352			ls_req_list_clr(nbr);
353
354			LIST_REMOVE(nbr, entry);
355			LIST_REMOVE(nbr, hash);
356
357			free(nbr);
358			}
359
360			struct nbr *
361			nbr_find_peerid(u_int32_t peerid)
362			{
363			struct nbr_head *head;
364			struct nbr *nbr;
365
366			head = NBR_HASH(peerid);
367
368			LIST_FOREACH(nbr, head, hash) {
369			if (nbr->peerid == peerid)
370			return (nbr);
371			}
372
373			return (NULL);
374			}
375
376			struct nbr *
377			nbr_find_id(struct iface *iface, u_int32_t rtr_id)
378			{
379			struct nbr *nbr = NULL;
380
381			LIST_FOREACH(nbr, &iface->nbr_list, entry) {
382			if (nbr->id.s_addr == rtr_id)
383			return (nbr);
384			}
385
386			return (NULL);
387			}
388
389			/* timers */
390			/* ARGSUSED */
391			void
392			nbr_itimer(int fd, short event, void *arg)
393			{
394			struct nbr *nbr = arg;
395
396			if (nbr->state == NBR_STA_DOWN)
397			nbr_del(nbr);
398			else
399			nbr_fsm(nbr, NBR_EVT_ITIMER);
400			}
401
402			void
403			nbr_start_itimer(struct nbr *nbr)
404			{
405			struct timeval tv;
406
407			timerclear(&tv);
408			tv.tv_sec = nbr->iface->dead_interval;
409
410			if (evtimer_add(&nbr->inactivity_timer, &tv) == -1)
411			fatal("nbr_start_itimer");
412			}
413
414			void
415			nbr_stop_itimer(struct nbr *nbr)
416			{
417			if (evtimer_del(&nbr->inactivity_timer) == -1)
418			fatal("nbr_stop_itimer");
419			}
420
421			void
422			nbr_reset_itimer(struct nbr *nbr)
423			{
424			struct timeval tv;
425
426			timerclear(&tv);
427			tv.tv_sec = nbr->iface->dead_interval;
428
429			if (evtimer_add(&nbr->inactivity_timer, &tv) == -1)
430			fatal("nbr_reset_itimer");
431			}
432
433			/* ARGSUSED */
434			void
435			nbr_adj_timer(int fd, short event, void *arg)
436			{
437			struct nbr *nbr = arg;
438
439			if (!(nbr->state & NBR_STA_ADJFORM))
440			return;
441
442			if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) {
443			log_warnx("nbr_adj_timer: failed to form adjacency with %s",
444			inet_ntoa(nbr->id));
445			nbr_fsm(nbr, NBR_EVT_ADJTMOUT);
446			}
447			}
448
449			void
450			nbr_start_adj_timer(struct nbr *nbr)
451			{
452			struct timeval tv;
453
454			timerclear(&tv);
455			tv.tv_sec = DEFAULT_ADJ_TMOUT;
456
457			if (evtimer_add(&nbr->adj_timer, &tv) == -1)
458			fatal("nbr_start_adj_timer");
459			}
460
461			/* actions */
462			int
463			nbr_act_reset_itimer(struct nbr *nbr)
464			{
465			nbr_reset_itimer(nbr);
466
467			return (0);
468			}
469
470			int
471			nbr_act_start_itimer(struct nbr *nbr)
472			{
473			nbr_start_itimer(nbr);
474
475			return (0);
476			}
477
478			int
479			nbr_adj_ok(struct nbr *nbr)
480			{
481			struct iface *iface = nbr->iface;
482
483			switch (iface->type) {
484			case IF_TYPE_POINTOPOINT:
485			case IF_TYPE_VIRTUALLINK:
486			case IF_TYPE_POINTOMULTIPOINT:
487			/* always ok */
488			break;
489			case IF_TYPE_BROADCAST:
490			case IF_TYPE_NBMA:
491			/*
492			* if neighbor is dr, bdr or router self is dr or bdr
493			* start forming adjacency
494			*/
495			if (iface->dr == nbr \|\| iface->bdr == nbr \|\|
496			iface->state & IF_STA_DRORBDR)
497			break;
498			return (0);
499			default:
500			fatalx("nbr_adj_ok: unknown interface type");
501			}
502			return (1);
503			}
504
505			int
506			nbr_act_eval(struct nbr *nbr)
507			{
508			if (!nbr_adj_ok(nbr)) {
509			nbr->state = NBR_STA_2_WAY;
510			return (0);
511			}
512
513			nbr->state = NBR_STA_XSTRT;
514			nbr->dd_master = 1;
515			nbr->dd_seq_num++; /* as per RFC */
516			nbr->dd_pending = 0;
517			/* initial db negotiation */
518			start_db_tx_timer(nbr);
519
520			nbr_start_adj_timer(nbr);
521
522			return (0);
523			}
524
525			int
526			nbr_act_snapshot(struct nbr *nbr)
527			{
528			stop_db_tx_timer(nbr);
529
530			/* we need to wait for the old snapshot to finish */
531			if (nbr->dd_snapshot) {
532			log_debug("nbr_act_snapshot: giving up, old snapshot running "
533			"for neigbor ID %s", inet_ntoa(nbr->id));
534			return (nbr_act_restart_dd(nbr));
535			}
536			ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0);
537
538			nbr->dd_snapshot = 1; /* wait for IMSG_DB_END */
539			nbr->state = NBR_STA_SNAP;
540
541			return (0);
542			}
543
544			int
545			nbr_act_exchange_done(struct nbr *nbr)
546			{
547			if (nbr->dd_master)
548			stop_db_tx_timer(nbr);
549
550			if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG &&
551			nbr->dd_pending == 0) {
552			nbr->state = NBR_STA_FULL;
553			return (0);
554			}
555
556			nbr->state = NBR_STA_LOAD;
557
558			if (!ls_req_list_empty(nbr))
559			start_ls_req_tx_timer(nbr);
560
561			return (0);
562			}
563
564			int
565			nbr_act_adj_ok(struct nbr *nbr)
566			{
567			if (nbr_adj_ok(nbr)) {
568			if (nbr->state == NBR_STA_2_WAY)
569			return (nbr_act_eval(nbr));
570			} else {
571			nbr->state = NBR_STA_2_WAY;
572			return (nbr_act_clear_lists(nbr));
573			}
574
575			return (0);
576			}
577
578			int
579			nbr_act_restart_dd(struct nbr *nbr)
580			{
581			nbr_act_clear_lists(nbr);
582
583			if (!nbr_adj_ok(nbr)) {
584			nbr->state = NBR_STA_2_WAY;
585			return (0);
586			}
587
588			nbr->state = NBR_STA_XSTRT;
589			nbr->dd_master = 1;
590			nbr->dd_seq_num += arc4random() & 0xffff;
591			nbr->dd_pending = 0;
592
593			/* initial db negotiation */
594			start_db_tx_timer(nbr);
595
596			nbr_start_adj_timer(nbr);
597
598			return (0);
599			}
600
601			int
602			nbr_act_delete(struct nbr *nbr)
603			{
604			struct timeval tv;
605
606			if (nbr == nbr->iface->self)
607			return (0);
608
609			/* stop timers */
610			nbr_stop_itimer(nbr);
611
612			/* clear dr and bdr */
613			nbr->dr.s_addr = 0;
614			nbr->bdr.s_addr = 0;
615
616			/* schedule kill timer */
617			timerclear(&tv);
618			tv.tv_sec = DEFAULT_NBR_TMOUT;
619
620			if (evtimer_add(&nbr->inactivity_timer, &tv)) {
621			log_warnx("nbr_act_delete: error scheduling neighbor ID %s "
622			"for removal", inet_ntoa(nbr->id));
623			}
624
625			return (nbr_act_clear_lists(nbr));
626			}
627
628			int
629			nbr_act_clear_lists(struct nbr *nbr)
630			{
631			/* stop timers */
632			stop_db_tx_timer(nbr);
633			stop_ls_req_tx_timer(nbr);
634
635			/* clear lists */
636			ls_retrans_list_clr(nbr);
637			db_sum_list_clr(nbr);
638			ls_req_list_clr(nbr);
639
640			return (0);
641			}
642
643			int
644			nbr_act_hello_check(struct nbr *nbr)
645			{
646			log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id));
647
648			return (-1);
649			}
650
651			struct ctl_nbr *
652			nbr_to_ctl(struct nbr *nbr)
653			{
654			static struct ctl_nbr nctl;
655			struct timeval tv, now, res;
656			struct lsa_entry *le;
657
658			memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name));
659			memcpy(&nctl.id, &nbr->id, sizeof(nctl.id));
660			memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr));
661			memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr));
662			memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr));
663			memcpy(&nctl.area, &nbr->iface->area_id, sizeof(nctl.area));
664
665			/* this list is 99% of the time empty so that's OK for now */
666			nctl.db_sum_lst_cnt = 0;
667			TAILQ_FOREACH(le, &nbr->db_sum_list, entry)
668			nctl.db_sum_lst_cnt++;
669
670			nctl.ls_req_lst_cnt = nbr->ls_req_cnt;
671			nctl.ls_retrans_lst_cnt = nbr->ls_ret_cnt;
672
673			nctl.nbr_state = nbr->state;
674
675			/*
676			* We need to trick a bit to show the remote iface state.
677			* The idea is to print DR, BDR or DROther dependent on
678			* the type of the neighbor.
679			*/
680			if (nbr->iface->dr == nbr)
681			nctl.iface_state = IF_STA_DR;
682			else if (nbr->iface->bdr == nbr)
683			nctl.iface_state = IF_STA_BACKUP;
684			else if (nbr->iface->state & IF_STA_MULTI)
685			nctl.iface_state = IF_STA_DROTHER;
686			else
687			nctl.iface_state = nbr->iface->state;
688
689			nctl.state_chng_cnt = nbr->stats.sta_chng;
690
691			nctl.priority = nbr->priority;
692			nctl.options = nbr->options;
693
694			gettimeofday(&now, NULL);
695			if (evtimer_pending(&nbr->inactivity_timer, &tv)) {
696			timersub(&tv, &now, &res);
697			if (nbr->state & NBR_STA_DOWN)
698			nctl.dead_timer = DEFAULT_NBR_TMOUT - res.tv_sec;
699			else
700			nctl.dead_timer = res.tv_sec;
701			} else
702			nctl.dead_timer = 0;
703
704			if (nbr->state == NBR_STA_FULL) {
705			nctl.uptime = now.tv_sec - nbr->uptime;
706			} else
707			nctl.uptime = 0;
708
709			return (&nctl);
710			}
711
712			struct lsa_hdr *
713			lsa_hdr_new(void)
714			{
715			struct lsa_hdr *lsa_hdr = NULL;
716
717			if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL)
718			fatal("lsa_hdr_new");
719
720			return (lsa_hdr);
721			}