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/* $KAME: if.c,v 1.6 2005/09/16 11:30:15 suz Exp $ */
/*
* Copyright (C) 2002 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <net/if.h>
#include <netinet/in.h>
#ifdef __KAME__
#include <net/if_dl.h>
#endif
#include <syslog.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ifaddrs.h>
#include <errno.h>
#include <dhcp6.h>
#include <config.h>
#include <common.h>
extern int errno;
struct dhcp6_if *dhcp6_if;
struct dhcp6_if *
ifinit(ifname)
char *ifname;
{
struct dhcp6_if *ifp;
if ((ifp = find_ifconfbyname(ifname)) != NULL) {
dprintf(LOG_NOTICE, FNAME, "duplicated interface: %s", ifname);
return (NULL);
}
if ((ifp = malloc(sizeof(*ifp))) == NULL) {
dprintf(LOG_ERR, FNAME, "malloc failed");
goto fail;
}
memset(ifp, 0, sizeof(*ifp));
TAILQ_INIT(&ifp->event_list);
if ((ifp->ifname = strdup(ifname)) == NULL) {
dprintf(LOG_ERR, FNAME, "failed to copy ifname");
goto fail;
}
if (ifreset(ifp))
goto fail;
TAILQ_INIT(&ifp->reqopt_list);
TAILQ_INIT(&ifp->iaconf_list);
ifp->authproto = DHCP6_AUTHPROTO_UNDEF;
ifp->authalgorithm = DHCP6_AUTHALG_UNDEF;
ifp->authrdm = DHCP6_AUTHRDM_UNDEF;
{
struct ifaddrs *ifa, *ifap;
struct sockaddr_in6 *sin6;
if (getifaddrs(&ifap) < 0) {
dprintf(LOG_ERR, FNAME, "getifaddrs failed: %s",
strerror(errno));
goto fail;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (strcmp(ifa->ifa_name, ifname) != 0)
continue;
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
continue;
ifp->addr = sin6->sin6_addr;
}
freeifaddrs(ifap);
}
ifp->next = dhcp6_if;
dhcp6_if = ifp;
return (ifp);
fail:
if (ifp->ifname != NULL)
free(ifp->ifname);
free(ifp);
return (NULL);
}
int
ifreset(ifp)
struct dhcp6_if *ifp;
{
unsigned int ifid;
u_int32_t linkid;
if ((ifid = if_nametoindex(ifp->ifname)) == 0) {
dprintf(LOG_ERR, FNAME, "invalid interface(%s): %s",
ifp->ifname, strerror(errno));
return (-1);
}
#ifdef HAVE_SCOPELIB
if (inet_zoneid(AF_INET6, 2, ifname, &linkid)) {
dprintf(LOG_ERR, FNAME, "failed to get link ID for %s",
ifname);
return (-1);
}
#else
linkid = ifid; /* XXX: assume 1to1 mapping IFs and links */
#endif
ifp->ifid = ifid;
ifp->linkid = linkid;
return (0);
}
struct dhcp6_if *
find_ifconfbyname(ifname)
char *ifname;
{
struct dhcp6_if *ifp;
for (ifp = dhcp6_if; ifp; ifp = ifp->next) {
if (strcmp(ifp->ifname, ifname) == 0)
return (ifp);
}
return (NULL);
}
struct dhcp6_if *
find_ifconfbyid(id)
unsigned int id;
{
struct dhcp6_if *ifp;
for (ifp = dhcp6_if; ifp; ifp = ifp->next) {
if (ifp->ifid == id)
return (ifp);
}
return (NULL);
}
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