diff options
Diffstat (limited to 'usr.sbin/rtsold/rtsock.c')
| -rw-r--r-- | usr.sbin/rtsold/rtsock.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/usr.sbin/rtsold/rtsock.c b/usr.sbin/rtsold/rtsock.c new file mode 100644 index 0000000..f1c4be8 --- /dev/null +++ b/usr.sbin/rtsold/rtsock.c @@ -0,0 +1,179 @@ +/* $KAME: rtsock.c,v 1.3 2000/10/10 08:46:45 itojun Exp $ */ +/* $FreeBSD$ */ + +/* + * Copyright (C) 2000 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/param.h> +#include <sys/socket.h> +#include <sys/uio.h> +#include <sys/time.h> +#include <sys/queue.h> + +#include <net/if.h> +#include <net/route.h> +#include <net/if_dl.h> + +#include <netinet/in.h> +#include <netinet/ip6.h> +#include <netinet/icmp6.h> + +#include <time.h> +#include <unistd.h> +#include <stdio.h> +#include <stddef.h> +#include <err.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <syslog.h> +#include "rtsold.h" + +#define ROUNDUP(a, size) \ + (((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a)) + +#define NEXT_SA(ap) (ap) = (struct sockaddr *) \ + ((caddr_t)(ap) + \ + ((ap)->sa_len ? ROUNDUP((ap)->sa_len, sizeof(u_long)) \ + : sizeof(u_long))) + +#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/ +static int rtsock_input_ifannounce __P((int, struct rt_msghdr *, char *)); +#endif + +static struct { + u_char type; + size_t minlen; + int (*func) __P((int, struct rt_msghdr *, char *)); +} rtsock_dispatch[] = { +#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/ + { RTM_IFANNOUNCE, sizeof(struct if_announcemsghdr), + rtsock_input_ifannounce }, +#endif + { 0, NULL }, +}; + +int +rtsock_open() +{ + + return socket(PF_ROUTE, SOCK_RAW, 0); +} + +int +rtsock_input(s) + int s; +{ + ssize_t n; + char msg[2048]; + char *lim, *next; + struct rt_msghdr *rtm; + int idx; + size_t len; + int ret = 0; + const size_t lenlim = + offsetof(struct rt_msghdr, rtm_msglen) + sizeof(rtm->rtm_msglen); + + n = read(s, msg, sizeof(msg)); + + lim = msg + n; + for (next = msg; next < lim; next += len) { + rtm = (struct rt_msghdr *)next; + if (lim - next < lenlim) + break; + len = rtm->rtm_msglen; + if (len < lenlim) + break; + + if (dflag > 1) { + warnmsg(LOG_INFO, __FUNCTION__, + "rtmsg type %d, len=%lu", rtm->rtm_type, + (u_long)len); + } + + for (idx = 0; rtsock_dispatch[idx].func; idx++) { + if (rtm->rtm_type != rtsock_dispatch[idx].type) + continue; + if (rtm->rtm_msglen < rtsock_dispatch[idx].minlen) { + warnmsg(LOG_INFO, __FUNCTION__, + "rtmsg type %d too short!", rtm->rtm_type); + continue; + } + + ret = (*rtsock_dispatch[idx].func)(s, rtm, lim); + break; + } + } + + return ret; +} + +#ifdef RTM_IFANNOUNCE /*NetBSD 1.5 or later*/ +static int +rtsock_input_ifannounce(s, rtm, lim) + int s; + struct rt_msghdr *rtm; + char *lim; +{ + struct if_announcemsghdr *ifan; + struct ifinfo *ifinfo; + + ifan = (struct if_announcemsghdr *)rtm; + if ((char *)(ifan + 1) > lim) + return -1; + + switch (ifan->ifan_what) { + case IFAN_ARRIVAL: + /* + * XXX for NetBSD 1.5, interface index will monotonically be + * increased as new pcmcia card gets inserted. + * we may be able to do a name-based interface match, + * and call ifreconfig() to enable the interface again. + */ + warnmsg(LOG_INFO, __FUNCTION__, + "interface %s inserted", ifan->ifan_name); + break; + case IFAN_DEPARTURE: + warnmsg(LOG_WARNING, __FUNCTION__, + "interface %s removed", ifan->ifan_name); + ifinfo = find_ifinfo(ifan->ifan_index); + if (ifinfo) { + if (dflag > 1) { + warnmsg(LOG_INFO, __FUNCTION__, + "bring interface %s to DOWN state", + ifan->ifan_name); + } + ifinfo->state = IFS_DOWN; + } + break; + } + + return 0; +} +#endif |
