Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/eigrpd/interface.c	Lines:	0	347	0.0 %
Date:	2017-11-13	Branches:	0	396	0.0 %


/*	$OpenBSD: interface.c,v 1.24 2017/02/22 14:24:50 renato Exp $ */

/*
 * Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2004, 2005 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/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "eigrpd.h"
#include "eigrpe.h"
#include "log.h"

static __inline int	 iface_id_compare(struct eigrp_iface *,
			    struct eigrp_iface *);
static struct iface	*if_new(struct eigrpd_conf *, struct kif *);
static void		 if_del(struct iface *);
static struct if_addr	*if_addr_lookup(struct if_addr_head *, struct kaddr *);
static void		 eigrp_if_start(struct eigrp_iface *);
static void		 eigrp_if_reset(struct eigrp_iface *);
static void		 eigrp_if_hello_timer(int, short, void *);
static void		 eigrp_if_start_hello_timer(struct eigrp_iface *);
static void		 eigrp_if_stop_hello_timer(struct eigrp_iface *);
static int		 if_join_ipv4_group(struct iface *, struct in_addr *);
static int		 if_leave_ipv4_group(struct iface *, struct in_addr *);
static int		 if_join_ipv6_group(struct iface *, struct in6_addr *);
static int		 if_leave_ipv6_group(struct iface *, struct in6_addr *);

RB_GENERATE(iface_id_head, eigrp_iface, id_tree, iface_id_compare)

struct iface_id_head ifaces_by_id = RB_INITIALIZER(&ifaces_by_id);

static __inline int
iface_id_compare(struct eigrp_iface *a, struct eigrp_iface *b)
{
	return (a->ifaceid - b->ifaceid);
}

static struct iface *
if_new(struct eigrpd_conf *xconf, struct kif *kif)
{
	struct iface		*iface;

	if ((iface = calloc(1, sizeof(*iface))) == NULL)
		fatal("if_new: calloc");

	TAILQ_INIT(&iface->ei_list);
	TAILQ_INIT(&iface->addr_list);

	strlcpy(iface->name, kif->ifname, sizeof(iface->name));

	/* get type */
	if (kif->flags & IFF_POINTOPOINT)
		iface->type = IF_TYPE_POINTOPOINT;
	if (kif->flags & IFF_BROADCAST &&
	    kif->flags & IFF_MULTICAST)
		iface->type = IF_TYPE_BROADCAST;
	if (kif->flags & IFF_LOOPBACK)
		iface->type = IF_TYPE_POINTOPOINT;

	/* get index and flags */
	iface->mtu = kif->mtu;
	iface->ifindex = kif->ifindex;
	iface->rdomain = kif->rdomain;
	iface->flags = kif->flags;
	iface->linkstate = kif->link_state;
	iface->if_type = kif->if_type;
	iface->baudrate = kif->baudrate;

	TAILQ_INSERT_TAIL(&xconf->iface_list, iface, entry);

	return (iface);
}

static void
if_del(struct iface *iface)
{
	struct if_addr		*if_addr;

	log_debug("%s: interface %s", __func__, iface->name);

	while ((if_addr = TAILQ_FIRST(&iface->addr_list)) != NULL) {
		TAILQ_REMOVE(&iface->addr_list, if_addr, entry);
		free(if_addr);
	}

	TAILQ_REMOVE(&econf->iface_list, iface, entry);
	free(iface);
}

struct iface *
if_lookup(struct eigrpd_conf *xconf, unsigned int ifindex)
{
	struct iface	*iface;

	TAILQ_FOREACH(iface, &xconf->iface_list, entry)
		if (iface->ifindex == ifindex)
			return (iface);

	return (NULL);
}

void
if_addr_new(struct iface *iface, struct kaddr *ka)
{
	struct if_addr		*if_addr;
	struct eigrp_iface	*ei;

	if (ka->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&ka->addr.v6)) {
		iface->linklocal = ka->addr.v6;
		if_update(iface, AF_INET6);
		return;
	}

	if (if_addr_lookup(&iface->addr_list, ka) != NULL)
		return;

	if ((if_addr = calloc(1, sizeof(*if_addr))) == NULL)
		fatal("if_addr_new: calloc");
	if_addr->af = ka->af;
	if_addr->addr = ka->addr;
	if_addr->prefixlen = ka->prefixlen;
	if_addr->dstbrd = ka->dstbrd;
	TAILQ_INSERT_TAIL(&iface->addr_list, if_addr, entry);

	TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
		if (ei->state == IF_STA_ACTIVE && ei->eigrp->af == if_addr->af)
			eigrpe_orig_local_route(ei, if_addr, 0);

	if (if_addr->af == AF_INET)
		if_update(iface, AF_INET);
}

void
if_addr_del(struct iface *iface, struct kaddr *ka)
{
	struct if_addr		*if_addr;
	struct eigrp_iface	*ei;
	int			 af = ka->af;

	if (ka->af == AF_INET6 &&
	    IN6_ARE_ADDR_EQUAL(&iface->linklocal, &ka->addr.v6)) {
		memset(&iface->linklocal, 0, sizeof(iface->linklocal));
		if_update(iface, AF_INET6);
		return;
	}

	if_addr = if_addr_lookup(&iface->addr_list, ka);
	if (if_addr == NULL)
		return;

	TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
		if (ei->state == IF_STA_ACTIVE && ei->eigrp->af == if_addr->af)
			eigrpe_orig_local_route(ei, if_addr, 1);

	TAILQ_REMOVE(&iface->addr_list, if_addr, entry);
	free(if_addr);

	if (af == AF_INET)
		if_update(iface, AF_INET);
}

static struct if_addr *
if_addr_lookup(struct if_addr_head *addr_list, struct kaddr *ka)
{
	struct if_addr	*if_addr;
	int		 af = ka->af;

	TAILQ_FOREACH(if_addr, addr_list, entry)
		if (!eigrp_addrcmp(af, &if_addr->addr, &ka->addr) &&
		    if_addr->prefixlen == ka->prefixlen &&
		    !eigrp_addrcmp(af, &if_addr->dstbrd, &ka->dstbrd))
			return (if_addr);

	return (NULL);
}

in_addr_t
if_primary_addr(struct iface *iface)
{
	struct if_addr	*if_addr;

	TAILQ_FOREACH(if_addr, &iface->addr_list, entry)
		if (if_addr->af == AF_INET)
			return (if_addr->addr.v4.s_addr);

	return (INADDR_ANY);
}

uint8_t
if_primary_addr_prefixlen(struct iface *iface)
{
	struct if_addr	*if_addr;

	TAILQ_FOREACH(if_addr, &iface->addr_list, entry)
		if (if_addr->af == AF_INET)
			return (if_addr->prefixlen);

	return (0);
}

/* up/down events */
void
if_update(struct iface *iface, int af)
{
	struct eigrp_iface	*ei;
	int			 link_ok;
	int			 addr_ok, addr4_ok = 0, addr6_ok = 0;
	struct if_addr		*if_addr;

	link_ok = (iface->flags & IFF_UP) &&
	    LINK_STATE_IS_UP(iface->linkstate);

	/*
	 * NOTE: for EIGRPv4, each interface should have at least one valid
	 * IP address otherwise they can not be enabled in the routing domain.
	 */
	TAILQ_FOREACH(if_addr, &iface->addr_list, entry) {
		if (if_addr->af == AF_INET) {
			addr4_ok = 1;
			break;
		}
	}
	/* for IPv6 the link-local address is enough. */
	if (IN6_IS_ADDR_LINKLOCAL(&iface->linklocal))
		addr6_ok = 1;

	TAILQ_FOREACH(ei, &iface->ei_list, i_entry) {
		if (af != AF_UNSPEC && ei->eigrp->af != af)
			continue;

		switch (ei->eigrp->af) {
		case AF_INET:
			addr_ok = addr4_ok;
			break;
		case AF_INET6:
			addr_ok = addr6_ok;
			break;
		default:
			fatalx("if_update: unknown af");
		}

		if (ei->state == IF_STA_DOWN) {
			if (!link_ok || !addr_ok)
				continue;
			ei->state = IF_STA_ACTIVE;
			eigrp_if_start(ei);
		} else if (ei->state == IF_STA_ACTIVE) {
			if (link_ok && addr_ok)
				continue;
			ei->state = IF_STA_DOWN;
			eigrp_if_reset(ei);
		}
	}
}

struct eigrp_iface *
eigrp_if_new(struct eigrpd_conf *xconf, struct eigrp *eigrp, struct kif *kif)
{
	struct iface		*iface;
	struct eigrp_iface	*ei;
	static uint32_t		 ifacecnt = 1;

	iface = if_lookup(xconf, kif->ifindex);
	if (iface == NULL)
		iface = if_new(xconf, kif);

	if ((ei = calloc(1, sizeof(*ei))) == NULL)
		fatal("eigrp_if_new: calloc");

	ei->state = IF_STA_DOWN;
	/* get next unused ifaceid */
	while (eigrp_if_lookup_id(ifacecnt++))
		;
	ei->ifaceid = ifacecnt;
	ei->eigrp = eigrp;
	ei->iface = iface;
	if (ei->iface->flags & IFF_LOOPBACK)
		ei->passive = 1;

	TAILQ_INIT(&ei->nbr_list);
	TAILQ_INIT(&ei->update_list);
	TAILQ_INIT(&ei->query_list);
	TAILQ_INIT(&ei->summary_list);
	TAILQ_INSERT_TAIL(&iface->ei_list, ei, i_entry);
	TAILQ_INSERT_TAIL(&eigrp->ei_list, ei, e_entry);
	if (RB_INSERT(iface_id_head, &ifaces_by_id, ei) != NULL)
		fatalx("eigrp_if_new: RB_INSERT(ifaces_by_id) failed");

	return (ei);
}

void
eigrp_if_del(struct eigrp_iface *ei)
{
	struct summary_addr	*summary;

	RB_REMOVE(iface_id_head, &ifaces_by_id, ei);
	TAILQ_REMOVE(&ei->eigrp->ei_list, ei, e_entry);
	TAILQ_REMOVE(&ei->iface->ei_list, ei, i_entry);
	while ((summary = TAILQ_FIRST(&ei->summary_list)) != NULL) {
		TAILQ_REMOVE(&ei->summary_list, summary, entry);
		free(summary);
	}
	message_list_clr(&ei->query_list);
	message_list_clr(&ei->update_list);

	if (ei->state == IF_STA_ACTIVE)
		eigrp_if_reset(ei);

	if (TAILQ_EMPTY(&ei->iface->ei_list))
		if_del(ei->iface);

	free(ei);
}

struct eigrp_iface *
eigrp_if_lookup(struct iface *iface, int af, uint16_t as)
{
	struct eigrp_iface	*ei;

	TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
		if (ei->eigrp->af == af &&
		    ei->eigrp->as == as)
			return (ei);

	return (NULL);
}

struct eigrp_iface *
eigrp_if_lookup_id(uint32_t ifaceid)
{
	struct eigrp_iface	 e;
	e.ifaceid = ifaceid;
	return (RB_FIND(iface_id_head, &ifaces_by_id, &e));
}

static void
eigrp_if_start(struct eigrp_iface *ei)
{
	struct eigrp		*eigrp = ei->eigrp;
	struct timeval		 now;
	struct if_addr		*if_addr;
	union eigrpd_addr	 addr;

	log_debug("%s: %s as %u family %s", __func__, ei->iface->name,
	    eigrp->as, af_name(eigrp->af));

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

	/* init the dummy self neighbor */
	memset(&addr, 0, sizeof(addr));
	ei->self = nbr_new(ei, &addr, 0, 1);
	nbr_init(ei->self);

	TAILQ_FOREACH(if_addr, &ei->iface->addr_list, entry) {
		if (if_addr->af != eigrp->af)
			continue;

		eigrpe_orig_local_route(ei, if_addr, 0);
	}

	if (ei->passive)
		return;

	switch (eigrp->af) {
	case AF_INET:
		if (if_join_ipv4_group(ei->iface, &global.mcast_addr_v4))
			return;
		break;
	case AF_INET6:
		if (if_join_ipv6_group(ei->iface, &global.mcast_addr_v6))
			return;
		break;
	default:
		fatalx("eigrp_if_start: unknown af");
	}

	evtimer_set(&ei->hello_timer, eigrp_if_hello_timer, ei);
	eigrp_if_start_hello_timer(ei);
}

static void
eigrp_if_reset(struct eigrp_iface *ei)
{
	struct eigrp		*eigrp = ei->eigrp;
	struct nbr		*nbr;

	log_debug("%s: %s as %u family %s", __func__, ei->iface->name,
	    eigrp->as, af_name(eigrp->af));

	/* the rde will withdraw the connected route for us */

	while ((nbr = TAILQ_FIRST(&ei->nbr_list)) != NULL)
		nbr_del(nbr);

	if (ei->passive)
		return;

	/* try to cleanup */
	switch (eigrp->af) {
	case AF_INET:
		if_leave_ipv4_group(ei->iface, &global.mcast_addr_v4);
		break;
	case AF_INET6:
		if_leave_ipv6_group(ei->iface, &global.mcast_addr_v6);
		break;
	default:
		fatalx("eigrp_if_reset: unknown af");
	}

	eigrp_if_stop_hello_timer(ei);
}

/* timers */
/* ARGSUSED */
static void
eigrp_if_hello_timer(int fd, short event, void *arg)
{
	struct eigrp_iface	*ei = arg;
	struct timeval		 tv;

	send_hello(ei, NULL, 0);

	/* reschedule hello_timer */
	timerclear(&tv);
	tv.tv_sec = ei->hello_interval;
	if (evtimer_add(&ei->hello_timer, &tv) == -1)
		fatal("eigrp_if_hello_timer");
}

static void
eigrp_if_start_hello_timer(struct eigrp_iface *ei)
{
	struct timeval		 tv;

	timerclear(&tv);
	tv.tv_sec = ei->hello_interval;
	if (evtimer_add(&ei->hello_timer, &tv) == -1)
		fatal("eigrp_if_start_hello_timer");
}

static void
eigrp_if_stop_hello_timer(struct eigrp_iface *ei)
{
	if (evtimer_pending(&ei->hello_timer, NULL) &&
	    evtimer_del(&ei->hello_timer) == -1)
		fatal("eigrp_if_stop_hello_timer");
}

struct ctl_iface *
if_to_ctl(struct eigrp_iface *ei)
{
	static struct ctl_iface	 ictl;
	struct timeval		 now;
	struct nbr		*nbr;

	ictl.af = ei->eigrp->af;
	ictl.as = ei->eigrp->as;
	memcpy(ictl.name, ei->iface->name, sizeof(ictl.name));
	ictl.ifindex = ei->iface->ifindex;
	switch (ei->eigrp->af) {
	case AF_INET:
		ictl.addr.v4.s_addr = if_primary_addr(ei->iface);
		ictl.prefixlen = if_primary_addr_prefixlen(ei->iface);
		break;
	case AF_INET6:
		ictl.addr.v6 = ei->iface->linklocal;
		if (!IN6_IS_ADDR_UNSPECIFIED(&ei->iface->linklocal))
			ictl.prefixlen = 64;
		else
			ictl.prefixlen = 0;
		break;
	default:
		fatalx("if_to_ctl: unknown af");
	}
	ictl.flags = ei->iface->flags;
	ictl.linkstate = ei->iface->linkstate;
	ictl.mtu = ei->iface->mtu;
	ictl.type = ei->iface->type;
	ictl.if_type = ei->iface->if_type;
	ictl.baudrate = ei->iface->baudrate;
	ictl.delay = ei->delay;
	ictl.bandwidth = ei->bandwidth;
	ictl.hello_holdtime = ei->hello_holdtime;
	ictl.hello_interval = ei->hello_interval;
	ictl.splithorizon = ei->splithorizon;
	ictl.passive = ei->passive;
	ictl.nbr_cnt = 0;

	gettimeofday(&now, NULL);
	if (ei->state != IF_STA_DOWN && ei->uptime != 0)
		ictl.uptime = now.tv_sec - ei->uptime;
	else
		ictl.uptime = 0;

	TAILQ_FOREACH(nbr, &ei->nbr_list, entry)
		if (!(nbr->flags & (F_EIGRP_NBR_PENDING|F_EIGRP_NBR_SELF)))
			ictl.nbr_cnt++;

	return (&ictl);
}

/* misc */
void
if_set_sockbuf(int fd)
{
	int	bsize;

	bsize = 65535;
	while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize,
	    sizeof(bsize)) == -1)
		bsize /= 2;

	if (bsize != 65535)
		log_warnx("%s: recvbuf size only %d", __func__, bsize);

	bsize = 65535;
	while (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &bsize,
	    sizeof(bsize)) == -1)
		bsize /= 2;

	if (bsize != 65535)
		log_warnx("%s: sendbuf size only %d", __func__, bsize);
}

static int
if_join_ipv4_group(struct iface *iface, struct in_addr *addr)
{
	struct ip_mreq		 mreq;

	if (iface->group_count_v4++ != 0)
		/* already joined */
		return (0);

	log_debug("%s: interface %s addr %s", __func__, iface->name,
	    inet_ntoa(*addr));

	mreq.imr_multiaddr = *addr;
	mreq.imr_interface.s_addr = if_primary_addr(iface);

	if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_ADD_MEMBERSHIP,
	    (void *)&mreq, sizeof(mreq)) < 0) {
		log_warn("%s: error IP_ADD_MEMBERSHIP, interface %s address %s",
		    __func__, iface->name, inet_ntoa(*addr));
		return (-1);
	}

	return (0);
}

static int
if_leave_ipv4_group(struct iface *iface, struct in_addr *addr)
{
	struct ip_mreq		 mreq;

	if (--iface->group_count_v4 != 0)
		/* others still joined */
		return (0);

	log_debug("%s: interface %s addr %s", __func__, iface->name,
	    inet_ntoa(*addr));

	mreq.imr_multiaddr = *addr;
	mreq.imr_interface.s_addr = if_primary_addr(iface);

	if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_DROP_MEMBERSHIP,
	    (void *)&mreq, sizeof(mreq)) < 0) {
		log_warn("%s: error IP_DROP_MEMBERSHIP, interface %s "
		    "address %s", iface->name, __func__, inet_ntoa(*addr));
		return (-1);
	}

	return (0);
}

int
if_set_ipv4_mcast_ttl(int fd, uint8_t ttl)
{
	if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL,
	    (char *)&ttl, sizeof(ttl)) < 0) {
		log_warn("%s: error setting IP_MULTICAST_TTL to %d",
		    __func__, ttl);
		return (-1);
	}

	return (0);
}

int
if_set_ipv4_mcast(struct iface *iface)
{
	in_addr_t	 addr;

	addr = if_primary_addr(iface);

	if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_MULTICAST_IF,
	    &addr, sizeof(addr)) < 0) {
		log_warn("%s: error setting IP_MULTICAST_IF, interface %s",
		    __func__, iface->name);
		return (-1);
	}

	return (0);
}

int
if_set_ipv4_mcast_loop(int fd)
{
	uint8_t	loop = 0;

	if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
	    (char *)&loop, sizeof(loop)) < 0) {
		log_warn("%s: error setting IP_MULTICAST_LOOP", __func__);
		return (-1);
	}

	return (0);
}

int
if_set_ipv4_recvif(int fd, int enable)
{
	if (setsockopt(fd, IPPROTO_IP, IP_RECVIF, &enable,
	    sizeof(enable)) < 0) {
		log_warn("%s: error setting IP_RECVIF", __func__);
		return (-1);
	}
	return (0);
}

int
if_set_ipv4_hdrincl(int fd)
{
	int	hincl = 1;

	if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof(hincl)) < 0) {
		log_warn("%s: error setting IP_HDRINCL", __func__);
		return (-1);
	}

	return (0);
}

static int
if_join_ipv6_group(struct iface *iface, struct in6_addr *addr)
{
	struct ipv6_mreq	 mreq;

	if (iface->group_count_v6++ != 0)
		/* already joined */
		return (0);

	log_debug("%s: interface %s addr %s", __func__, iface->name,
	    log_in6addr(addr));

	mreq.ipv6mr_multiaddr = *addr;
	mreq.ipv6mr_interface = iface->ifindex;

	if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_JOIN_GROUP,
	    &mreq, sizeof(mreq)) < 0) {
		log_warn("%s: error IPV6_JOIN_GROUP, interface %s address %s",
		    __func__, iface->name, log_in6addr(addr));
		return (-1);
	}

	return (0);
}

static int
if_leave_ipv6_group(struct iface *iface, struct in6_addr *addr)
{
	struct ipv6_mreq	 mreq;

	if (--iface->group_count_v6 != 0)
		/* others still joined */
		return (0);

	log_debug("%s: interface %s addr %s", __func__, iface->name,
	    log_in6addr(addr));

	mreq.ipv6mr_multiaddr = *addr;
	mreq.ipv6mr_interface = iface->ifindex;

	if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
	    (void *)&mreq, sizeof(mreq)) < 0) {
		log_warn("%s: error IPV6_LEAVE_GROUP, interface %s address %s",
		    __func__, iface->name, log_in6addr(addr));
		return (-1);
	}

	return (0);
}

int
if_set_ipv6_mcast(struct iface *iface)
{
	if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_MULTICAST_IF,
	    &iface->ifindex, sizeof(iface->ifindex)) < 0) {
		log_warn("%s: error setting IPV6_MULTICAST_IF, interface %s",
		    __func__, iface->name);
		return (-1);
	}

	return (0);
}

int
if_set_ipv6_mcast_loop(int fd)
{
	unsigned int	loop = 0;

	if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
	    (unsigned int *)&loop, sizeof(loop)) < 0) {
		log_warn("%s: error setting IPV6_MULTICAST_LOOP", __func__);
		return (-1);
	}

	return (0);
}

int
if_set_ipv6_pktinfo(int fd, int enable)
{
	if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable,
	    sizeof(enable)) < 0) {
		log_warn("%s: error setting IPV6_RECVPKTINFO", __func__);
		return (-1);
	}

	return (0);
}

int
if_set_ipv6_dscp(int fd, int dscp)
{
	if (setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, &dscp,
	    sizeof(dscp)) < 0) {
		log_warn("%s: error setting IPV6_TCLASS", __func__);
		return (-1);
	}

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: interface.c,v 1.24 2017/02/22 14:24:50 renato Exp $ */
2
3			/*
4			* Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
5			* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
6			* Copyright (c) 2004, 2005 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/socket.h>
23			#include <sys/ioctl.h>
24			#include <arpa/inet.h>
25
26			#include <ctype.h>
27			#include <stdlib.h>
28			#include <string.h>
29			#include <unistd.h>
30
31			#include "eigrpd.h"
32			#include "eigrpe.h"
33			#include "log.h"
34
35			static __inline int iface_id_compare(struct eigrp_iface *,
36			struct eigrp_iface *);
37			static struct iface if_new(struct eigrpd_conf , struct kif *);
38			static void if_del(struct iface *);
39			static struct if_addr if_addr_lookup(struct if_addr_head , struct kaddr *);
40			static void eigrp_if_start(struct eigrp_iface *);
41			static void eigrp_if_reset(struct eigrp_iface *);
42			static void eigrp_if_hello_timer(int, short, void *);
43			static void eigrp_if_start_hello_timer(struct eigrp_iface *);
44			static void eigrp_if_stop_hello_timer(struct eigrp_iface *);
45			static int if_join_ipv4_group(struct iface , struct in_addr );
46			static int if_leave_ipv4_group(struct iface , struct in_addr );
47			static int if_join_ipv6_group(struct iface , struct in6_addr );
48			static int if_leave_ipv6_group(struct iface , struct in6_addr );
49
50			RB_GENERATE(iface_id_head, eigrp_iface, id_tree, iface_id_compare)
51
52			struct iface_id_head ifaces_by_id = RB_INITIALIZER(&ifaces_by_id);
53
54			static __inline int
55			iface_id_compare(struct eigrp_iface a, struct eigrp_iface b)
56			{
57			return (a->ifaceid - b->ifaceid);
58			}
59
60			static struct iface *
61			if_new(struct eigrpd_conf xconf, struct kif kif)
62			{
63			struct iface *iface;
64
65			if ((iface = calloc(1, sizeof(*iface))) == NULL)
66			fatal("if_new: calloc");
67
68			TAILQ_INIT(&iface->ei_list);
69			TAILQ_INIT(&iface->addr_list);
70
71			strlcpy(iface->name, kif->ifname, sizeof(iface->name));
72
73			/* get type */
74			if (kif->flags & IFF_POINTOPOINT)
75			iface->type = IF_TYPE_POINTOPOINT;
76			if (kif->flags & IFF_BROADCAST &&
77			kif->flags & IFF_MULTICAST)
78			iface->type = IF_TYPE_BROADCAST;
79			if (kif->flags & IFF_LOOPBACK)
80			iface->type = IF_TYPE_POINTOPOINT;
81
82			/* get index and flags */
83			iface->mtu = kif->mtu;
84			iface->ifindex = kif->ifindex;
85			iface->rdomain = kif->rdomain;
86			iface->flags = kif->flags;
87			iface->linkstate = kif->link_state;
88			iface->if_type = kif->if_type;
89			iface->baudrate = kif->baudrate;
90
91			TAILQ_INSERT_TAIL(&xconf->iface_list, iface, entry);
92
93			return (iface);
94			}
95
96			static void
97			if_del(struct iface *iface)
98			{
99			struct if_addr *if_addr;
100
101			log_debug("%s: interface %s", __func__, iface->name);
102
103			while ((if_addr = TAILQ_FIRST(&iface->addr_list)) != NULL) {
104			TAILQ_REMOVE(&iface->addr_list, if_addr, entry);
105			free(if_addr);
106			}
107
108			TAILQ_REMOVE(&econf->iface_list, iface, entry);
109			free(iface);
110			}
111
112			struct iface *
113			if_lookup(struct eigrpd_conf *xconf, unsigned int ifindex)
114			{
115			struct iface *iface;
116
117			TAILQ_FOREACH(iface, &xconf->iface_list, entry)
118			if (iface->ifindex == ifindex)
119			return (iface);
120
121			return (NULL);
122			}
123
124			void
125			if_addr_new(struct iface iface, struct kaddr ka)
126			{
127			struct if_addr *if_addr;
128			struct eigrp_iface *ei;
129
130			if (ka->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&ka->addr.v6)) {
131			iface->linklocal = ka->addr.v6;
132			if_update(iface, AF_INET6);
133			return;
134			}
135
136			if (if_addr_lookup(&iface->addr_list, ka) != NULL)
137			return;
138
139			if ((if_addr = calloc(1, sizeof(*if_addr))) == NULL)
140			fatal("if_addr_new: calloc");
141			if_addr->af = ka->af;
142			if_addr->addr = ka->addr;
143			if_addr->prefixlen = ka->prefixlen;
144			if_addr->dstbrd = ka->dstbrd;
145			TAILQ_INSERT_TAIL(&iface->addr_list, if_addr, entry);
146
147			TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
148			if (ei->state == IF_STA_ACTIVE && ei->eigrp->af == if_addr->af)
149			eigrpe_orig_local_route(ei, if_addr, 0);
150
151			if (if_addr->af == AF_INET)
152			if_update(iface, AF_INET);
153			}
154
155			void
156			if_addr_del(struct iface iface, struct kaddr ka)
157			{
158			struct if_addr *if_addr;
159			struct eigrp_iface *ei;
160			int af = ka->af;
161
162			if (ka->af == AF_INET6 &&
163			IN6_ARE_ADDR_EQUAL(&iface->linklocal, &ka->addr.v6)) {
164			memset(&iface->linklocal, 0, sizeof(iface->linklocal));
165			if_update(iface, AF_INET6);
166			return;
167			}
168
169			if_addr = if_addr_lookup(&iface->addr_list, ka);
170			if (if_addr == NULL)
171			return;
172
173			TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
174			if (ei->state == IF_STA_ACTIVE && ei->eigrp->af == if_addr->af)
175			eigrpe_orig_local_route(ei, if_addr, 1);
176
177			TAILQ_REMOVE(&iface->addr_list, if_addr, entry);
178			free(if_addr);
179
180			if (af == AF_INET)
181			if_update(iface, AF_INET);
182			}
183
184			static struct if_addr *
185			if_addr_lookup(struct if_addr_head addr_list, struct kaddr ka)
186			{
187			struct if_addr *if_addr;
188			int af = ka->af;
189
190			TAILQ_FOREACH(if_addr, addr_list, entry)
191			if (!eigrp_addrcmp(af, &if_addr->addr, &ka->addr) &&
192			if_addr->prefixlen == ka->prefixlen &&
193			!eigrp_addrcmp(af, &if_addr->dstbrd, &ka->dstbrd))
194			return (if_addr);
195
196			return (NULL);
197			}
198
199			in_addr_t
200			if_primary_addr(struct iface *iface)
201			{
202			struct if_addr *if_addr;
203
204			TAILQ_FOREACH(if_addr, &iface->addr_list, entry)
205			if (if_addr->af == AF_INET)
206			return (if_addr->addr.v4.s_addr);
207
208			return (INADDR_ANY);
209			}
210
211			uint8_t
212			if_primary_addr_prefixlen(struct iface *iface)
213			{
214			struct if_addr *if_addr;
215
216			TAILQ_FOREACH(if_addr, &iface->addr_list, entry)
217			if (if_addr->af == AF_INET)
218			return (if_addr->prefixlen);
219
220			return (0);
221			}
222
223			/* up/down events */
224			void
225			if_update(struct iface *iface, int af)
226			{
227			struct eigrp_iface *ei;
228			int link_ok;
229			int addr_ok, addr4_ok = 0, addr6_ok = 0;
230			struct if_addr *if_addr;
231
232			link_ok = (iface->flags & IFF_UP) &&
233			LINK_STATE_IS_UP(iface->linkstate);
234
235			/*
236			* NOTE: for EIGRPv4, each interface should have at least one valid
237			* IP address otherwise they can not be enabled in the routing domain.
238			*/
239			TAILQ_FOREACH(if_addr, &iface->addr_list, entry) {
240			if (if_addr->af == AF_INET) {
241			addr4_ok = 1;
242			break;
243			}
244			}
245			/* for IPv6 the link-local address is enough. */
246			if (IN6_IS_ADDR_LINKLOCAL(&iface->linklocal))
247			addr6_ok = 1;
248
249			TAILQ_FOREACH(ei, &iface->ei_list, i_entry) {
250			if (af != AF_UNSPEC && ei->eigrp->af != af)
251			continue;
252
253			switch (ei->eigrp->af) {
254			case AF_INET:
255			addr_ok = addr4_ok;
256			break;
257			case AF_INET6:
258			addr_ok = addr6_ok;
259			break;
260			default:
261			fatalx("if_update: unknown af");
262			}
263
264			if (ei->state == IF_STA_DOWN) {
265			if (!link_ok \|\| !addr_ok)
266			continue;
267			ei->state = IF_STA_ACTIVE;
268			eigrp_if_start(ei);
269			} else if (ei->state == IF_STA_ACTIVE) {
270			if (link_ok && addr_ok)
271			continue;
272			ei->state = IF_STA_DOWN;
273			eigrp_if_reset(ei);
274			}
275			}
276			}
277
278			struct eigrp_iface *
279			eigrp_if_new(struct eigrpd_conf xconf, struct eigrp eigrp, struct kif *kif)
280			{
281			struct iface *iface;
282			struct eigrp_iface *ei;
283			static uint32_t ifacecnt = 1;
284
285			iface = if_lookup(xconf, kif->ifindex);
286			if (iface == NULL)
287			iface = if_new(xconf, kif);
288
289			if ((ei = calloc(1, sizeof(*ei))) == NULL)
290			fatal("eigrp_if_new: calloc");
291
292			ei->state = IF_STA_DOWN;
293			/* get next unused ifaceid */
294			while (eigrp_if_lookup_id(ifacecnt++))
295			;
296			ei->ifaceid = ifacecnt;
297			ei->eigrp = eigrp;
298			ei->iface = iface;
299			if (ei->iface->flags & IFF_LOOPBACK)
300			ei->passive = 1;
301
302			TAILQ_INIT(&ei->nbr_list);
303			TAILQ_INIT(&ei->update_list);
304			TAILQ_INIT(&ei->query_list);
305			TAILQ_INIT(&ei->summary_list);
306			TAILQ_INSERT_TAIL(&iface->ei_list, ei, i_entry);
307			TAILQ_INSERT_TAIL(&eigrp->ei_list, ei, e_entry);
308			if (RB_INSERT(iface_id_head, &ifaces_by_id, ei) != NULL)
309			fatalx("eigrp_if_new: RB_INSERT(ifaces_by_id) failed");
310
311			return (ei);
312			}
313
314			void
315			eigrp_if_del(struct eigrp_iface *ei)
316			{
317			struct summary_addr *summary;
318
319			RB_REMOVE(iface_id_head, &ifaces_by_id, ei);
320			TAILQ_REMOVE(&ei->eigrp->ei_list, ei, e_entry);
321			TAILQ_REMOVE(&ei->iface->ei_list, ei, i_entry);
322			while ((summary = TAILQ_FIRST(&ei->summary_list)) != NULL) {
323			TAILQ_REMOVE(&ei->summary_list, summary, entry);
324			free(summary);
325			}
326			message_list_clr(&ei->query_list);
327			message_list_clr(&ei->update_list);
328
329			if (ei->state == IF_STA_ACTIVE)
330			eigrp_if_reset(ei);
331
332			if (TAILQ_EMPTY(&ei->iface->ei_list))
333			if_del(ei->iface);
334
335			free(ei);
336			}
337
338			struct eigrp_iface *
339			eigrp_if_lookup(struct iface *iface, int af, uint16_t as)
340			{
341			struct eigrp_iface *ei;
342
343			TAILQ_FOREACH(ei, &iface->ei_list, i_entry)
344			if (ei->eigrp->af == af &&
345			ei->eigrp->as == as)
346			return (ei);
347
348			return (NULL);
349			}
350
351			struct eigrp_iface *
352			eigrp_if_lookup_id(uint32_t ifaceid)
353			{
354			struct eigrp_iface e;
355			e.ifaceid = ifaceid;
356			return (RB_FIND(iface_id_head, &ifaces_by_id, &e));
357			}
358
359			static void
360			eigrp_if_start(struct eigrp_iface *ei)
361			{
362			struct eigrp *eigrp = ei->eigrp;
363			struct timeval now;
364			struct if_addr *if_addr;
365			union eigrpd_addr addr;
366
367			log_debug("%s: %s as %u family %s", __func__, ei->iface->name,
368			eigrp->as, af_name(eigrp->af));
369
370			gettimeofday(&now, NULL);
371			ei->uptime = now.tv_sec;
372
373			/* init the dummy self neighbor */
374			memset(&addr, 0, sizeof(addr));
375			ei->self = nbr_new(ei, &addr, 0, 1);
376			nbr_init(ei->self);
377
378			TAILQ_FOREACH(if_addr, &ei->iface->addr_list, entry) {
379			if (if_addr->af != eigrp->af)
380			continue;
381
382			eigrpe_orig_local_route(ei, if_addr, 0);
383			}
384
385			if (ei->passive)
386			return;
387
388			switch (eigrp->af) {
389			case AF_INET:
390			if (if_join_ipv4_group(ei->iface, &global.mcast_addr_v4))
391			return;
392			break;
393			case AF_INET6:
394			if (if_join_ipv6_group(ei->iface, &global.mcast_addr_v6))
395			return;
396			break;
397			default:
398			fatalx("eigrp_if_start: unknown af");
399			}
400
401			evtimer_set(&ei->hello_timer, eigrp_if_hello_timer, ei);
402			eigrp_if_start_hello_timer(ei);
403			}
404
405			static void
406			eigrp_if_reset(struct eigrp_iface *ei)
407			{
408			struct eigrp *eigrp = ei->eigrp;
409			struct nbr *nbr;
410
411			log_debug("%s: %s as %u family %s", __func__, ei->iface->name,
412			eigrp->as, af_name(eigrp->af));
413
414			/* the rde will withdraw the connected route for us */
415
416			while ((nbr = TAILQ_FIRST(&ei->nbr_list)) != NULL)
417			nbr_del(nbr);
418
419			if (ei->passive)
420			return;
421
422			/* try to cleanup */
423			switch (eigrp->af) {
424			case AF_INET:
425			if_leave_ipv4_group(ei->iface, &global.mcast_addr_v4);
426			break;
427			case AF_INET6:
428			if_leave_ipv6_group(ei->iface, &global.mcast_addr_v6);
429			break;
430			default:
431			fatalx("eigrp_if_reset: unknown af");
432			}
433
434			eigrp_if_stop_hello_timer(ei);
435			}
436
437			/* timers */
438			/* ARGSUSED */
439			static void
440			eigrp_if_hello_timer(int fd, short event, void *arg)
441			{
442			struct eigrp_iface *ei = arg;
443			struct timeval tv;
444
445			send_hello(ei, NULL, 0);
446
447			/* reschedule hello_timer */
448			timerclear(&tv);
449			tv.tv_sec = ei->hello_interval;
450			if (evtimer_add(&ei->hello_timer, &tv) == -1)
451			fatal("eigrp_if_hello_timer");
452			}
453
454			static void
455			eigrp_if_start_hello_timer(struct eigrp_iface *ei)
456			{
457			struct timeval tv;
458
459			timerclear(&tv);
460			tv.tv_sec = ei->hello_interval;
461			if (evtimer_add(&ei->hello_timer, &tv) == -1)
462			fatal("eigrp_if_start_hello_timer");
463			}
464
465			static void
466			eigrp_if_stop_hello_timer(struct eigrp_iface *ei)
467			{
468			if (evtimer_pending(&ei->hello_timer, NULL) &&
469			evtimer_del(&ei->hello_timer) == -1)
470			fatal("eigrp_if_stop_hello_timer");
471			}
472
473			struct ctl_iface *
474			if_to_ctl(struct eigrp_iface *ei)
475			{
476			static struct ctl_iface ictl;
477			struct timeval now;
478			struct nbr *nbr;
479
480			ictl.af = ei->eigrp->af;
481			ictl.as = ei->eigrp->as;
482			memcpy(ictl.name, ei->iface->name, sizeof(ictl.name));
483			ictl.ifindex = ei->iface->ifindex;
484			switch (ei->eigrp->af) {
485			case AF_INET:
486			ictl.addr.v4.s_addr = if_primary_addr(ei->iface);
487			ictl.prefixlen = if_primary_addr_prefixlen(ei->iface);
488			break;
489			case AF_INET6:
490			ictl.addr.v6 = ei->iface->linklocal;
491			if (!IN6_IS_ADDR_UNSPECIFIED(&ei->iface->linklocal))
492			ictl.prefixlen = 64;
493			else
494			ictl.prefixlen = 0;
495			break;
496			default:
497			fatalx("if_to_ctl: unknown af");
498			}
499			ictl.flags = ei->iface->flags;
500			ictl.linkstate = ei->iface->linkstate;
501			ictl.mtu = ei->iface->mtu;
502			ictl.type = ei->iface->type;
503			ictl.if_type = ei->iface->if_type;
504			ictl.baudrate = ei->iface->baudrate;
505			ictl.delay = ei->delay;
506			ictl.bandwidth = ei->bandwidth;
507			ictl.hello_holdtime = ei->hello_holdtime;
508			ictl.hello_interval = ei->hello_interval;
509			ictl.splithorizon = ei->splithorizon;
510			ictl.passive = ei->passive;
511			ictl.nbr_cnt = 0;
512
513			gettimeofday(&now, NULL);
514			if (ei->state != IF_STA_DOWN && ei->uptime != 0)
515			ictl.uptime = now.tv_sec - ei->uptime;
516			else
517			ictl.uptime = 0;
518
519			TAILQ_FOREACH(nbr, &ei->nbr_list, entry)
520			if (!(nbr->flags & (F_EIGRP_NBR_PENDING\|F_EIGRP_NBR_SELF)))
521			ictl.nbr_cnt++;
522
523			return (&ictl);
524			}
525
526			/* misc */
527			void
528			if_set_sockbuf(int fd)
529			{
530			int bsize;
531
532			bsize = 65535;
533			while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize,
534			sizeof(bsize)) == -1)
535			bsize /= 2;
536
537			if (bsize != 65535)
538			log_warnx("%s: recvbuf size only %d", __func__, bsize);
539
540			bsize = 65535;
541			while (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &bsize,
542			sizeof(bsize)) == -1)
543			bsize /= 2;
544
545			if (bsize != 65535)
546			log_warnx("%s: sendbuf size only %d", __func__, bsize);
547			}
548
549			static int
550			if_join_ipv4_group(struct iface iface, struct in_addr addr)
551			{
552			struct ip_mreq mreq;
553
554			if (iface->group_count_v4++ != 0)
555			/* already joined */
556			return (0);
557
558			log_debug("%s: interface %s addr %s", __func__, iface->name,
559			inet_ntoa(*addr));
560
561			mreq.imr_multiaddr = *addr;
562			mreq.imr_interface.s_addr = if_primary_addr(iface);
563
564			if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_ADD_MEMBERSHIP,
565			(void *)&mreq, sizeof(mreq)) < 0) {
566			log_warn("%s: error IP_ADD_MEMBERSHIP, interface %s address %s",
567			__func__, iface->name, inet_ntoa(*addr));
568			return (-1);
569			}
570
571			return (0);
572			}
573
574			static int
575			if_leave_ipv4_group(struct iface iface, struct in_addr addr)
576			{
577			struct ip_mreq mreq;
578
579			if (--iface->group_count_v4 != 0)
580			/* others still joined */
581			return (0);
582
583			log_debug("%s: interface %s addr %s", __func__, iface->name,
584			inet_ntoa(*addr));
585
586			mreq.imr_multiaddr = *addr;
587			mreq.imr_interface.s_addr = if_primary_addr(iface);
588
589			if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_DROP_MEMBERSHIP,
590			(void *)&mreq, sizeof(mreq)) < 0) {
591			log_warn("%s: error IP_DROP_MEMBERSHIP, interface %s "
592			"address %s", iface->name, __func__, inet_ntoa(*addr));
593			return (-1);
594			}
595
596			return (0);
597			}
598
599			int
600			if_set_ipv4_mcast_ttl(int fd, uint8_t ttl)
601			{
602			if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL,
603			(char *)&ttl, sizeof(ttl)) < 0) {
604			log_warn("%s: error setting IP_MULTICAST_TTL to %d",
605			__func__, ttl);
606			return (-1);
607			}
608
609			return (0);
610			}
611
612			int
613			if_set_ipv4_mcast(struct iface *iface)
614			{
615			in_addr_t addr;
616
617			addr = if_primary_addr(iface);
618
619			if (setsockopt(global.eigrp_socket_v4, IPPROTO_IP, IP_MULTICAST_IF,
620			&addr, sizeof(addr)) < 0) {
621			log_warn("%s: error setting IP_MULTICAST_IF, interface %s",
622			__func__, iface->name);
623			return (-1);
624			}
625
626			return (0);
627			}
628
629			int
630			if_set_ipv4_mcast_loop(int fd)
631			{
632			uint8_t loop = 0;
633
634			if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
635			(char *)&loop, sizeof(loop)) < 0) {
636			log_warn("%s: error setting IP_MULTICAST_LOOP", __func__);
637			return (-1);
638			}
639
640			return (0);
641			}
642
643			int
644			if_set_ipv4_recvif(int fd, int enable)
645			{
646			if (setsockopt(fd, IPPROTO_IP, IP_RECVIF, &enable,
647			sizeof(enable)) < 0) {
648			log_warn("%s: error setting IP_RECVIF", __func__);
649			return (-1);
650			}
651			return (0);
652			}
653
654			int
655			if_set_ipv4_hdrincl(int fd)
656			{
657			int hincl = 1;
658
659			if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof(hincl)) < 0) {
660			log_warn("%s: error setting IP_HDRINCL", __func__);
661			return (-1);
662			}
663
664			return (0);
665			}
666
667			static int
668			if_join_ipv6_group(struct iface iface, struct in6_addr addr)
669			{
670			struct ipv6_mreq mreq;
671
672			if (iface->group_count_v6++ != 0)
673			/* already joined */
674			return (0);
675
676			log_debug("%s: interface %s addr %s", __func__, iface->name,
677			log_in6addr(addr));
678
679			mreq.ipv6mr_multiaddr = *addr;
680			mreq.ipv6mr_interface = iface->ifindex;
681
682			if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_JOIN_GROUP,
683			&mreq, sizeof(mreq)) < 0) {
684			log_warn("%s: error IPV6_JOIN_GROUP, interface %s address %s",
685			__func__, iface->name, log_in6addr(addr));
686			return (-1);
687			}
688
689			return (0);
690			}
691
692			static int
693			if_leave_ipv6_group(struct iface iface, struct in6_addr addr)
694			{
695			struct ipv6_mreq mreq;
696
697			if (--iface->group_count_v6 != 0)
698			/* others still joined */
699			return (0);
700
701			log_debug("%s: interface %s addr %s", __func__, iface->name,
702			log_in6addr(addr));
703
704			mreq.ipv6mr_multiaddr = *addr;
705			mreq.ipv6mr_interface = iface->ifindex;
706
707			if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
708			(void *)&mreq, sizeof(mreq)) < 0) {
709			log_warn("%s: error IPV6_LEAVE_GROUP, interface %s address %s",
710			__func__, iface->name, log_in6addr(addr));
711			return (-1);
712			}
713
714			return (0);
715			}
716
717			int
718			if_set_ipv6_mcast(struct iface *iface)
719			{
720			if (setsockopt(global.eigrp_socket_v6, IPPROTO_IPV6, IPV6_MULTICAST_IF,
721			&iface->ifindex, sizeof(iface->ifindex)) < 0) {
722			log_warn("%s: error setting IPV6_MULTICAST_IF, interface %s",
723			__func__, iface->name);
724			return (-1);
725			}
726
727			return (0);
728			}
729
730			int
731			if_set_ipv6_mcast_loop(int fd)
732			{
733			unsigned int loop = 0;
734
735			if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
736			(unsigned int *)&loop, sizeof(loop)) < 0) {
737			log_warn("%s: error setting IPV6_MULTICAST_LOOP", __func__);
738			return (-1);
739			}
740
741			return (0);
742			}
743
744			int
745			if_set_ipv6_pktinfo(int fd, int enable)
746			{
747			if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable,
748			sizeof(enable)) < 0) {
749			log_warn("%s: error setting IPV6_RECVPKTINFO", __func__);
750			return (-1);
751			}
752
753			return (0);
754			}
755
756			int
757			if_set_ipv6_dscp(int fd, int dscp)
758			{
759			if (setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, &dscp,
760			sizeof(dscp)) < 0) {
761			log_warn("%s: error setting IPV6_TCLASS", __func__);
762			return (-1);
763			}
764
765			return (0);
766			}