diff options
Diffstat (limited to 'if.c')
| -rw-r--r-- | if.c | 184 |
1 files changed, 184 insertions, 0 deletions
@@ -0,0 +1,184 @@ +/* $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); +} |