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56d5e0967c
Sponsored by: Nginx, Inc.
750 lines
18 KiB
C
750 lines
18 KiB
C
/* $FreeBSD$ */
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/* $KAME: if.c,v 1.17 2001/01/21 15:27:30 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/ethernet.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include <netinet6/nd6.h>
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#include <unistd.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include "pathnames.h"
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#include "rtadvd.h"
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#include "if.h"
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#define ROUNDUP(a, size) \
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(((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a))
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#define NEXT_SA(ap) \
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(ap) = (struct sockaddr *)((caddr_t)(ap) + \
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((ap)->sa_len ? ROUNDUP((ap)->sa_len, sizeof(u_long)) : \
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sizeof(u_long)))
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struct sockaddr_in6 sin6_linklocal_allnodes = {
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.sin6_len = sizeof(sin6_linklocal_allnodes),
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.sin6_family = AF_INET6,
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.sin6_addr = IN6ADDR_LINKLOCAL_ALLNODES_INIT,
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};
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struct sockaddr_in6 sin6_linklocal_allrouters = {
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.sin6_len = sizeof(sin6_linklocal_allrouters),
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.sin6_family = AF_INET6,
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.sin6_addr = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT,
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};
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struct sockaddr_in6 sin6_sitelocal_allrouters = {
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.sin6_len = sizeof(sin6_sitelocal_allrouters),
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.sin6_family = AF_INET6,
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.sin6_addr = IN6ADDR_SITELOCAL_ALLROUTERS_INIT,
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};
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struct sockinfo sock = { .si_fd = -1, .si_name = NULL };
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struct sockinfo rtsock = { .si_fd = -1, .si_name = NULL };
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struct sockinfo ctrlsock = { .si_fd = -1, .si_name = _PATH_CTRL_SOCK };
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char *mcastif;
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static void get_rtaddrs(int, struct sockaddr *,
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struct sockaddr **);
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static struct if_msghdr *get_next_msghdr(struct if_msghdr *,
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struct if_msghdr *);
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static void
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get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
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{
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int i;
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for (i = 0; i < RTAX_MAX; i++) {
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if (addrs & (1 << i)) {
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rti_info[i] = sa;
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NEXT_SA(sa);
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}
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else
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rti_info[i] = NULL;
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}
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}
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#define ROUNDUP8(a) (1 + (((a) - 1) | 7))
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int
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lladdropt_length(struct sockaddr_dl *sdl)
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{
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switch (sdl->sdl_type) {
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case IFT_ETHER:
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return (ROUNDUP8(ETHER_ADDR_LEN + 2));
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default:
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return (0);
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}
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}
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void
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lladdropt_fill(struct sockaddr_dl *sdl, struct nd_opt_hdr *ndopt)
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{
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char *addr;
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ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */
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switch (sdl->sdl_type) {
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case IFT_ETHER:
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ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
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addr = (char *)(ndopt + 1);
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memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
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break;
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default:
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syslog(LOG_ERR, "<%s> unsupported link type(%d)",
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__func__, sdl->sdl_type);
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exit(1);
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}
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return;
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}
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int
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rtbuf_len(void)
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{
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size_t len;
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int mib[6] = {CTL_NET, AF_ROUTE, 0, AF_INET6, NET_RT_DUMP, 0};
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if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
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return (-1);
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return (len);
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}
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#define FILTER_MATCH(type, filter) ((0x1 << type) & filter)
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#define SIN6(s) ((struct sockaddr_in6 *)(s))
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#define SDL(s) ((struct sockaddr_dl *)(s))
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char *
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get_next_msg(char *buf, char *lim, int ifindex, size_t *lenp, int filter)
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{
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struct rt_msghdr *rtm;
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struct ifa_msghdr *ifam;
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struct sockaddr *sa, *dst, *gw, *ifa, *rti_info[RTAX_MAX];
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*lenp = 0;
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for (rtm = (struct rt_msghdr *)buf;
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rtm < (struct rt_msghdr *)lim;
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rtm = (struct rt_msghdr *)(((char *)rtm) + rtm->rtm_msglen)) {
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/* just for safety */
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if (!rtm->rtm_msglen) {
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syslog(LOG_WARNING, "<%s> rtm_msglen is 0 "
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"(buf=%p lim=%p rtm=%p)", __func__,
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buf, lim, rtm);
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break;
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}
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if (((struct rt_msghdr *)buf)->rtm_version != RTM_VERSION) {
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syslog(LOG_WARNING,
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"<%s> routing message version mismatch "
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"(buf=%p lim=%p rtm=%p)", __func__,
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buf, lim, rtm);
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continue;
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}
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if (FILTER_MATCH(rtm->rtm_type, filter) == 0)
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continue;
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switch (rtm->rtm_type) {
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case RTM_GET:
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case RTM_ADD:
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case RTM_DELETE:
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/* address related checks */
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sa = (struct sockaddr *)(rtm + 1);
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get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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if ((dst = rti_info[RTAX_DST]) == NULL ||
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dst->sa_family != AF_INET6)
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continue;
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if (IN6_IS_ADDR_LINKLOCAL(&SIN6(dst)->sin6_addr) ||
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IN6_IS_ADDR_MULTICAST(&SIN6(dst)->sin6_addr))
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continue;
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if ((gw = rti_info[RTAX_GATEWAY]) == NULL ||
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gw->sa_family != AF_LINK)
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continue;
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if (ifindex && SDL(gw)->sdl_index != ifindex)
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continue;
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if (rti_info[RTAX_NETMASK] == NULL)
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continue;
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/* found */
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*lenp = rtm->rtm_msglen;
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return (char *)rtm;
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/* NOTREACHED */
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case RTM_NEWADDR:
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case RTM_DELADDR:
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ifam = (struct ifa_msghdr *)rtm;
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/* address related checks */
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sa = (struct sockaddr *)(ifam + 1);
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get_rtaddrs(ifam->ifam_addrs, sa, rti_info);
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if ((ifa = rti_info[RTAX_IFA]) == NULL ||
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(ifa->sa_family != AF_INET &&
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ifa->sa_family != AF_INET6))
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continue;
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if (ifa->sa_family == AF_INET6 &&
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(IN6_IS_ADDR_LINKLOCAL(&SIN6(ifa)->sin6_addr) ||
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IN6_IS_ADDR_MULTICAST(&SIN6(ifa)->sin6_addr)))
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continue;
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if (ifindex && ifam->ifam_index != ifindex)
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continue;
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/* found */
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*lenp = ifam->ifam_msglen;
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return (char *)rtm;
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/* NOTREACHED */
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case RTM_IFINFO:
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case RTM_IFANNOUNCE:
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/* found */
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*lenp = rtm->rtm_msglen;
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return (char *)rtm;
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/* NOTREACHED */
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}
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}
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return ((char *)rtm);
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}
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#undef FILTER_MATCH
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struct in6_addr *
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get_addr(char *buf)
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{
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struct rt_msghdr *rtm = (struct rt_msghdr *)buf;
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struct sockaddr *sa, *rti_info[RTAX_MAX];
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sa = (struct sockaddr *)(rtm + 1);
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get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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return (&SIN6(rti_info[RTAX_DST])->sin6_addr);
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}
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int
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get_rtm_ifindex(char *buf)
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{
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struct rt_msghdr *rtm = (struct rt_msghdr *)buf;
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struct sockaddr *sa, *rti_info[RTAX_MAX];
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sa = (struct sockaddr *)(rtm + 1);
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get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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return (((struct sockaddr_dl *)rti_info[RTAX_GATEWAY])->sdl_index);
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}
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int
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get_prefixlen(char *buf)
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{
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struct rt_msghdr *rtm = (struct rt_msghdr *)buf;
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struct sockaddr *sa, *rti_info[RTAX_MAX];
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char *p, *lim;
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sa = (struct sockaddr *)(rtm + 1);
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get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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sa = rti_info[RTAX_NETMASK];
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p = (char *)(&SIN6(sa)->sin6_addr);
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lim = (char *)sa + sa->sa_len;
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return prefixlen(p, lim);
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}
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int
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prefixlen(unsigned char *p, unsigned char *lim)
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{
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int masklen;
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for (masklen = 0; p < lim; p++) {
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switch (*p) {
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case 0xff:
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masklen += 8;
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break;
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case 0xfe:
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masklen += 7;
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break;
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case 0xfc:
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masklen += 6;
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break;
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case 0xf8:
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masklen += 5;
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break;
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case 0xf0:
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masklen += 4;
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break;
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case 0xe0:
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masklen += 3;
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break;
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case 0xc0:
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masklen += 2;
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break;
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case 0x80:
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masklen += 1;
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break;
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case 0x00:
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break;
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default:
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return (-1);
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}
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}
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return (masklen);
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}
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struct ifinfo *
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update_persist_ifinfo(struct ifilist_head_t *ifi_head, const char *ifname)
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{
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struct ifinfo *ifi;
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int ifindex;
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ifi = NULL;
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ifindex = if_nametoindex(ifname);
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TAILQ_FOREACH(ifi, ifi_head, ifi_next) {
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if (ifindex != 0) {
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if (ifindex == ifi->ifi_ifindex)
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break;
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} else {
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if (strncmp(ifname, ifi->ifi_ifname,
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sizeof(ifi->ifi_ifname)) == 0)
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break;
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}
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}
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if (ifi == NULL) {
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/* A new ifinfo element is needed. */
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syslog(LOG_DEBUG, "<%s> new entry: %s", __func__,
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ifname);
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ELM_MALLOC(ifi, exit(1));
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ifi->ifi_ifindex = 0;
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strncpy(ifi->ifi_ifname, ifname, sizeof(ifi->ifi_ifname)-1);
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ifi->ifi_ifname[sizeof(ifi->ifi_ifname)-1] = '\0';
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ifi->ifi_rainfo = NULL;
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ifi->ifi_state = IFI_STATE_UNCONFIGURED;
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TAILQ_INSERT_TAIL(ifi_head, ifi, ifi_next);
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}
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ifi->ifi_persist = 1;
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syslog(LOG_DEBUG, "<%s> %s is marked PERSIST", __func__,
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ifi->ifi_ifname);
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syslog(LOG_DEBUG, "<%s> %s is state = %d", __func__,
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ifi->ifi_ifname, ifi->ifi_state);
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return (ifi);
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}
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int
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update_ifinfo_nd_flags(struct ifinfo *ifi)
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{
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struct in6_ndireq nd;
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int s;
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int error;
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if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR,
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"<%s> socket() failed.", __func__);
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return (1);
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}
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/* ND flags */
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memset(&nd, 0, sizeof(nd));
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strncpy(nd.ifname, ifi->ifi_ifname,
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sizeof(nd.ifname));
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error = ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd);
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if (error) {
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close(s);
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if (errno != EPFNOSUPPORT)
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syslog(LOG_ERR, "<%s> ioctl() failed.", __func__);
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return (1);
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}
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ifi->ifi_nd_flags = nd.ndi.flags;
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close(s);
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return (0);
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}
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struct ifinfo *
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update_ifinfo(struct ifilist_head_t *ifi_head, int ifindex)
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{
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struct if_msghdr *ifm;
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struct ifinfo *ifi = NULL;
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struct sockaddr *sa;
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struct sockaddr *rti_info[RTAX_MAX];
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char *msg;
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size_t len;
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char *lim;
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int mib[] = { CTL_NET, PF_ROUTE, 0, AF_INET6, NET_RT_IFLIST, 0 };
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int error;
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syslog(LOG_DEBUG, "<%s> enter", __func__);
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if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), NULL, &len, NULL, 0) <
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0) {
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syslog(LOG_ERR,
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"<%s> sysctl: NET_RT_IFLIST size get failed", __func__);
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exit(1);
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}
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if ((msg = malloc(len)) == NULL) {
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syslog(LOG_ERR, "<%s> malloc failed", __func__);
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exit(1);
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}
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if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), msg, &len, NULL, 0) <
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0) {
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syslog(LOG_ERR,
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"<%s> sysctl: NET_RT_IFLIST get failed", __func__);
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exit(1);
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}
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lim = msg + len;
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for (ifm = (struct if_msghdr *)msg;
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ifm != NULL && ifm < (struct if_msghdr *)lim;
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ifm = get_next_msghdr(ifm,(struct if_msghdr *)lim)) {
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int ifi_new;
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syslog(LOG_DEBUG, "<%s> ifm = %p, lim = %p, diff = %zu",
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__func__, ifm, lim, (char *)lim - (char *)ifm);
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if (ifm->ifm_version != RTM_VERSION) {
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syslog(LOG_ERR,
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"<%s> ifm_vesrion mismatch", __func__);
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exit(1);
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}
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if (ifm->ifm_msglen == 0) {
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syslog(LOG_WARNING,
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"<%s> ifm_msglen is 0", __func__);
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free(msg);
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return (NULL);
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}
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ifi_new = 0;
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if (ifm->ifm_type == RTM_IFINFO) {
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struct ifreq ifr;
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int s;
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char ifname[IFNAMSIZ];
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syslog(LOG_DEBUG, "<%s> RTM_IFINFO found. "
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"ifm_index = %d, ifindex = %d",
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__func__, ifm->ifm_index, ifindex);
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/* when ifindex is specified */
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if (ifindex != UPDATE_IFINFO_ALL &&
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ifindex != ifm->ifm_index)
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continue;
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/* lookup an entry with the same ifindex */
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TAILQ_FOREACH(ifi, ifi_head, ifi_next) {
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if (ifm->ifm_index == ifi->ifi_ifindex)
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break;
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if_indextoname(ifm->ifm_index, ifname);
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if (strncmp(ifname, ifi->ifi_ifname,
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sizeof(ifname)) == 0)
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break;
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}
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if (ifi == NULL) {
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syslog(LOG_DEBUG,
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"<%s> new entry for idx=%d",
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__func__, ifm->ifm_index);
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ELM_MALLOC(ifi, exit(1));
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ifi->ifi_rainfo = NULL;
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ifi->ifi_state = IFI_STATE_UNCONFIGURED;
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ifi->ifi_persist = 0;
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ifi_new = 1;
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}
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/* ifindex */
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ifi->ifi_ifindex = ifm->ifm_index;
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/* ifname */
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if_indextoname(ifm->ifm_index, ifi->ifi_ifname);
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if (ifi->ifi_ifname == NULL) {
|
|
syslog(LOG_WARNING,
|
|
"<%s> ifname not found (idx=%d)",
|
|
__func__, ifm->ifm_index);
|
|
if (ifi_new)
|
|
free(ifi);
|
|
continue;
|
|
}
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"<%s> socket() failed.", __func__);
|
|
if (ifi_new)
|
|
free(ifi);
|
|
continue;
|
|
}
|
|
|
|
/* MTU */
|
|
ifi->ifi_phymtu = ifm->ifm_data.ifi_mtu;
|
|
if (ifi->ifi_phymtu == 0) {
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
ifr.ifr_addr.sa_family = AF_INET6;
|
|
strncpy(ifr.ifr_name, ifi->ifi_ifname,
|
|
sizeof(ifr.ifr_name));
|
|
error = ioctl(s, SIOCGIFMTU, (caddr_t)&ifr);
|
|
if (error) {
|
|
close(s);
|
|
syslog(LOG_ERR,
|
|
"<%s> ioctl() failed.",
|
|
__func__);
|
|
if (ifi_new)
|
|
free(ifi);
|
|
continue;
|
|
}
|
|
ifi->ifi_phymtu = ifr.ifr_mtu;
|
|
if (ifi->ifi_phymtu == 0) {
|
|
syslog(LOG_WARNING,
|
|
"<%s> no interface mtu info"
|
|
" on %s. %d will be used.",
|
|
__func__, ifi->ifi_ifname,
|
|
IPV6_MMTU);
|
|
ifi->ifi_phymtu = IPV6_MMTU;
|
|
}
|
|
}
|
|
close(s);
|
|
|
|
/* ND flags */
|
|
error = update_ifinfo_nd_flags(ifi);
|
|
if (error) {
|
|
if (ifi_new)
|
|
free(ifi);
|
|
continue;
|
|
}
|
|
|
|
/* SDL */
|
|
sa = (struct sockaddr *)(ifm + 1);
|
|
get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
|
|
if ((sa = rti_info[RTAX_IFP]) != NULL) {
|
|
if (sa->sa_family == AF_LINK) {
|
|
memcpy(&ifi->ifi_sdl,
|
|
(struct sockaddr_dl *)sa,
|
|
sizeof(ifi->ifi_sdl));
|
|
}
|
|
} else
|
|
memset(&ifi->ifi_sdl, 0,
|
|
sizeof(ifi->ifi_sdl));
|
|
|
|
/* flags */
|
|
ifi->ifi_flags = ifm->ifm_flags;
|
|
|
|
/* type */
|
|
ifi->ifi_type = ifm->ifm_type;
|
|
} else {
|
|
syslog(LOG_ERR,
|
|
"out of sync parsing NET_RT_IFLIST\n"
|
|
"expected %d, got %d\n msglen = %d\n",
|
|
RTM_IFINFO, ifm->ifm_type, ifm->ifm_msglen);
|
|
exit(1);
|
|
}
|
|
|
|
if (ifi_new) {
|
|
syslog(LOG_DEBUG,
|
|
"<%s> adding %s(idx=%d) to ifilist",
|
|
__func__, ifi->ifi_ifname, ifi->ifi_ifindex);
|
|
TAILQ_INSERT_TAIL(ifi_head, ifi, ifi_next);
|
|
}
|
|
}
|
|
free(msg);
|
|
|
|
if (mcastif != NULL) {
|
|
error = sock_mc_rr_update(&sock, mcastif);
|
|
if (error)
|
|
exit(1);
|
|
}
|
|
|
|
return (ifi);
|
|
}
|
|
|
|
static struct if_msghdr *
|
|
get_next_msghdr(struct if_msghdr *ifm, struct if_msghdr *lim)
|
|
{
|
|
struct ifa_msghdr *ifam;
|
|
|
|
for (ifam = (struct ifa_msghdr *)((char *)ifm + ifm->ifm_msglen);
|
|
ifam < (struct ifa_msghdr *)lim;
|
|
ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen)) {
|
|
if (!ifam->ifam_msglen) {
|
|
syslog(LOG_WARNING,
|
|
"<%s> ifa_msglen is 0", __func__);
|
|
return (NULL);
|
|
}
|
|
if (ifam->ifam_type != RTM_NEWADDR)
|
|
break;
|
|
}
|
|
|
|
return ((struct if_msghdr *)ifam);
|
|
}
|
|
|
|
int
|
|
getinet6sysctl(int code)
|
|
{
|
|
int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
|
|
int value;
|
|
size_t size;
|
|
|
|
mib[3] = code;
|
|
size = sizeof(value);
|
|
if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0)
|
|
< 0) {
|
|
syslog(LOG_ERR, "<%s>: failed to get ip6 sysctl(%d): %s",
|
|
__func__, code,
|
|
strerror(errno));
|
|
return (-1);
|
|
}
|
|
else
|
|
return (value);
|
|
}
|
|
|
|
|
|
int
|
|
sock_mc_join(struct sockinfo *s, int ifindex)
|
|
{
|
|
struct ipv6_mreq mreq;
|
|
char ifname[IFNAMSIZ];
|
|
|
|
syslog(LOG_DEBUG, "<%s> enter", __func__);
|
|
|
|
if (ifindex == 0)
|
|
return (1);
|
|
|
|
/*
|
|
* join all routers multicast address on each advertising
|
|
* interface.
|
|
*/
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
/* XXX */
|
|
memcpy(&mreq.ipv6mr_multiaddr.s6_addr,
|
|
&sin6_linklocal_allrouters.sin6_addr,
|
|
sizeof(mreq.ipv6mr_multiaddr.s6_addr));
|
|
|
|
mreq.ipv6mr_interface = ifindex;
|
|
if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq,
|
|
sizeof(mreq)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"<%s> IPV6_JOIN_GROUP(link) on %s: %s",
|
|
__func__, if_indextoname(ifindex, ifname),
|
|
strerror(errno));
|
|
return (1);
|
|
}
|
|
syslog(LOG_DEBUG,
|
|
"<%s> %s: join link-local all-routers MC group",
|
|
__func__, if_indextoname(ifindex, ifname));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sock_mc_leave(struct sockinfo *s, int ifindex)
|
|
{
|
|
struct ipv6_mreq mreq;
|
|
char ifname[IFNAMSIZ];
|
|
|
|
syslog(LOG_DEBUG, "<%s> enter", __func__);
|
|
|
|
if (ifindex == 0)
|
|
return (1);
|
|
|
|
/*
|
|
* join all routers multicast address on each advertising
|
|
* interface.
|
|
*/
|
|
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
/* XXX */
|
|
memcpy(&mreq.ipv6mr_multiaddr.s6_addr,
|
|
&sin6_linklocal_allrouters.sin6_addr,
|
|
sizeof(mreq.ipv6mr_multiaddr.s6_addr));
|
|
|
|
mreq.ipv6mr_interface = ifindex;
|
|
if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq,
|
|
sizeof(mreq)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"<%s> IPV6_JOIN_LEAVE(link) on %s: %s",
|
|
__func__, if_indextoname(ifindex, ifname),
|
|
strerror(errno));
|
|
return (1);
|
|
}
|
|
syslog(LOG_DEBUG,
|
|
"<%s> %s: leave link-local all-routers MC group",
|
|
__func__, if_indextoname(ifindex, ifname));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sock_mc_rr_update(struct sockinfo *s, char *mif)
|
|
{
|
|
struct ipv6_mreq mreq;
|
|
|
|
syslog(LOG_DEBUG, "<%s> enter", __func__);
|
|
|
|
if (mif == NULL)
|
|
return (1);
|
|
/*
|
|
* When attending router renumbering, join all-routers site-local
|
|
* multicast group.
|
|
*/
|
|
/* XXX */
|
|
memcpy(&mreq.ipv6mr_multiaddr.s6_addr,
|
|
&sin6_sitelocal_allrouters.sin6_addr,
|
|
sizeof(mreq.ipv6mr_multiaddr.s6_addr));
|
|
if ((mreq.ipv6mr_interface = if_nametoindex(mif)) == 0) {
|
|
syslog(LOG_ERR,
|
|
"<%s> invalid interface: %s",
|
|
__func__, mif);
|
|
return (1);
|
|
}
|
|
|
|
if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_JOIN_GROUP,
|
|
&mreq, sizeof(mreq)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"<%s> IPV6_JOIN_GROUP(site) on %s: %s",
|
|
__func__, mif, strerror(errno));
|
|
return (1);
|
|
}
|
|
|
|
syslog(LOG_DEBUG,
|
|
"<%s> %s: join site-local all-routers MC group",
|
|
__func__, mif);
|
|
|
|
return (0);
|
|
}
|