/* $KAME: rtsock.c,v 1.3 2000/10/10 08:46:45 itojun Exp $ */ /* $FreeBSD: src/usr.sbin/rtsold/rtsock.c,v 1.1.2.1 2001/07/03 11:02:16 ume Exp $ */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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