ab3e3db491
Obtained from: KAME
176 lines
4.6 KiB
C
176 lines
4.6 KiB
C
/* $KAME: rtsock.c,v 1.3 2000/10/10 08:46:45 itojun Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (C) 2000 WIDE Project.
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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/uio.h>
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#include <sys/time.h>
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#include <sys/queue.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/if_dl.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <err.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include "rtsold.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) (ap) = (struct sockaddr *) \
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((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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#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/
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static int rtsock_input_ifannounce __P((int, struct rt_msghdr *, char *));
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#endif
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static struct {
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u_char type;
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size_t minlen;
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int (*func) __P((int, struct rt_msghdr *, char *));
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} rtsock_dispatch[] = {
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#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/
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{ RTM_IFANNOUNCE, sizeof(struct if_announcemsghdr),
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rtsock_input_ifannounce },
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#endif
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{ 0, NULL },
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};
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int
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rtsock_open(void)
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{
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return socket(PF_ROUTE, SOCK_RAW, 0);
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}
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int
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rtsock_input(int s)
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{
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ssize_t n;
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char msg[2048];
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char *lim, *next;
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struct rt_msghdr *rtm;
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int idx;
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size_t len;
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int ret = 0;
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const size_t lenlim =
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offsetof(struct rt_msghdr, rtm_msglen) + sizeof(rtm->rtm_msglen);
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n = read(s, msg, sizeof(msg));
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lim = msg + n;
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for (next = msg; next < lim; next += len) {
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rtm = (struct rt_msghdr *)next;
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if (lim - next < lenlim)
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break;
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len = rtm->rtm_msglen;
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if (len < lenlim)
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break;
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if (dflag > 1) {
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warnmsg(LOG_INFO, __func__,
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"rtmsg type %d, len=%lu", rtm->rtm_type,
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(u_long)len);
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}
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for (idx = 0; rtsock_dispatch[idx].func; idx++) {
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if (rtm->rtm_type != rtsock_dispatch[idx].type)
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continue;
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if (rtm->rtm_msglen < rtsock_dispatch[idx].minlen) {
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warnmsg(LOG_INFO, __func__,
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"rtmsg type %d too short!", rtm->rtm_type);
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continue;
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}
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ret = (*rtsock_dispatch[idx].func)(s, rtm, lim);
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break;
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}
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}
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return ret;
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}
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#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/
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static int
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rtsock_input_ifannounce(int s, struct rt_msghdr *rtm, char *lim)
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{
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struct if_announcemsghdr *ifan;
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struct ifinfo *ifinfo;
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ifan = (struct if_announcemsghdr *)rtm;
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if ((char *)(ifan + 1) > lim)
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return -1;
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switch (ifan->ifan_what) {
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case IFAN_ARRIVAL:
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/*
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* XXX for NetBSD 1.5, interface index will monotonically be
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* increased as new pcmcia card gets inserted.
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* we may be able to do a name-based interface match,
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* and call ifreconfig() to enable the interface again.
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*/
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warnmsg(LOG_INFO, __func__,
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"interface %s inserted", ifan->ifan_name);
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break;
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case IFAN_DEPARTURE:
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warnmsg(LOG_WARNING, __func__,
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"interface %s removed", ifan->ifan_name);
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ifinfo = find_ifinfo(ifan->ifan_index);
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if (ifinfo) {
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if (dflag > 1) {
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warnmsg(LOG_INFO, __func__,
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"bring interface %s to DOWN state",
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ifan->ifan_name);
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}
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ifinfo->state = IFS_DOWN;
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}
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break;
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}
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return 0;
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}
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#endif
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