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-rw-r--r--network_cmds/rtsol.tproj/rtsol.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/network_cmds/rtsol.tproj/rtsol.c b/network_cmds/rtsol.tproj/rtsol.c
new file mode 100644
index 0000000..e1b9bff
--- /dev/null
+++ b/network_cmds/rtsol.tproj/rtsol.c
@@ -0,0 +1,343 @@
+/* $KAME: rtsol.c,v 1.11 2000/08/13 06:14:59 itojun Exp $ */
+
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 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.
+ *
+ * $FreeBSD: src/usr.sbin/rtsold/rtsol.c,v 1.1.2.3 2001/07/03 11:02:16 ume Exp $
+ */
+
+#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 <netinet6/ip6_var.h>
+#include <netinet/icmp6.h>
+
+#include <arpa/inet.h>
+
+#include <time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <err.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include "rtsold.h"
+
+#define ALLROUTER "ff02::2"
+
+static struct msghdr rcvmhdr;
+static struct msghdr sndmhdr;
+static struct iovec rcviov[2];
+static struct iovec sndiov[2];
+static struct sockaddr_in6 from;
+
+int rssock;
+
+static struct sockaddr_in6 sin6_allrouters = {sizeof(sin6_allrouters), AF_INET6};
+
+int
+sockopen()
+{
+ int on;
+ struct icmp6_filter filt;
+ static u_char answer[1500];
+ int rcvcmsglen, sndcmsglen;
+ static u_char *rcvcmsgbuf = NULL, *sndcmsgbuf = NULL;
+
+ sndcmsglen = rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
+ CMSG_SPACE(sizeof(int));
+ if (rcvcmsgbuf == NULL && (rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) {
+ warnmsg(LOG_ERR, __FUNCTION__,
+ "malloc for receive msghdr failed");
+ return(-1);
+ }
+ if (sndcmsgbuf == NULL && (sndcmsgbuf = malloc(sndcmsglen)) == NULL) {
+ warnmsg(LOG_ERR, __FUNCTION__,
+ "malloc for send msghdr failed");
+ return(-1);
+ }
+ memset(&sin6_allrouters, 0, sizeof(struct sockaddr_in6));
+ if (inet_pton(AF_INET6, ALLROUTER,
+ &sin6_allrouters.sin6_addr.s6_addr) != 1) {
+ warnmsg(LOG_ERR, __FUNCTION__, "inet_pton failed for %s",
+ ALLROUTER);
+ return(-1);
+ }
+
+ if ((rssock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "socket: %s", strerror(errno));
+ return(-1);
+ }
+
+ /* specify to tell receiving interface */
+ on = 1;
+#ifdef IPV6_RECVPKTINFO
+ if (setsockopt(rssock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
+ sizeof(on)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "IPV6_RECVPKTINFO: %s",
+ strerror(errno));
+ exit(1);
+ }
+#else /* old adv. API */
+ if (setsockopt(rssock, IPPROTO_IPV6, IPV6_PKTINFO, &on,
+ sizeof(on)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "IPV6_PKTINFO: %s",
+ strerror(errno));
+ exit(1);
+ }
+#endif
+
+ on = 1;
+ /* specify to tell value of hoplimit field of received IP6 hdr */
+#ifdef IPV6_RECVHOPLIMIT
+ if (setsockopt(rssock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
+ sizeof(on)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "IPV6_RECVHOPLIMIT: %s",
+ strerror(errno));
+ exit(1);
+ }
+#else /* old adv. API */
+ if (setsockopt(rssock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on,
+ sizeof(on)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "IPV6_HOPLIMIT: %s",
+ strerror(errno));
+ exit(1);
+ }
+#endif
+
+ /* specfiy to accept only router advertisements on the socket */
+ ICMP6_FILTER_SETBLOCKALL(&filt);
+ ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filt);
+ if (setsockopt(rssock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
+ sizeof(filt)) == -1) {
+ warnmsg(LOG_ERR, __FUNCTION__, "setsockopt(ICMP6_FILTER): %s",
+ strerror(errno));
+ return(-1);
+ }
+
+ /* initialize msghdr for receiving packets */
+ rcviov[0].iov_base = (caddr_t)answer;
+ rcviov[0].iov_len = sizeof(answer);
+ rcvmhdr.msg_name = (caddr_t)&from;
+ rcvmhdr.msg_namelen = sizeof(from);
+ rcvmhdr.msg_iov = rcviov;
+ rcvmhdr.msg_iovlen = 1;
+ rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
+ rcvmhdr.msg_controllen = rcvcmsglen;
+
+ /* initialize msghdr for sending packets */
+ sndmhdr.msg_namelen = sizeof(struct sockaddr_in6);
+ sndmhdr.msg_iov = sndiov;
+ sndmhdr.msg_iovlen = 1;
+ sndmhdr.msg_control = (caddr_t)sndcmsgbuf;
+ sndmhdr.msg_controllen = sndcmsglen;
+
+ return(rssock);
+}
+
+void
+sendpacket(struct ifinfo *ifinfo)
+{
+ int i;
+ struct cmsghdr *cm;
+ struct in6_pktinfo *pi;
+
+ sndmhdr.msg_name = (caddr_t)&sin6_allrouters;
+ sndmhdr.msg_iov[0].iov_base = (caddr_t)ifinfo->rs_data;
+ sndmhdr.msg_iov[0].iov_len = ifinfo->rs_datalen;
+
+ cm = CMSG_FIRSTHDR(&sndmhdr);
+ /* specify the outgoing interface */
+ cm->cmsg_level = IPPROTO_IPV6;
+ cm->cmsg_type = IPV6_PKTINFO;
+ cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
+ pi = (struct in6_pktinfo *)CMSG_DATA(cm);
+ memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*XXX*/
+ pi->ipi6_ifindex = ifinfo->sdl->sdl_index;
+
+ /* specify the hop limit of the packet */
+ {
+ int hoplimit = 255;
+
+ cm = CMSG_NXTHDR(&sndmhdr, cm);
+ cm->cmsg_level = IPPROTO_IPV6;
+ cm->cmsg_type = IPV6_HOPLIMIT;
+ cm->cmsg_len = CMSG_LEN(sizeof(int));
+ memcpy(CMSG_DATA(cm), &hoplimit, sizeof(int));
+ }
+
+ warnmsg(LOG_DEBUG,
+ __FUNCTION__, "send RS on %s, whose state is %d",
+ ifinfo->ifname, ifinfo->state);
+
+ i = sendmsg(rssock, &sndmhdr, 0);
+
+ if (i < 0 || i != ifinfo->rs_datalen) {
+ /*
+ * ENETDOWN is not so serious, especially when using several
+ * network cards on a mobile node. We ignore it.
+ */
+ if (errno != ENETDOWN || dflag > 0)
+ warnmsg(LOG_ERR, __FUNCTION__, "sendmsg on %s: %s",
+ ifinfo->ifname, strerror(errno));
+ }
+
+ /* update counter */
+ ifinfo->probes++;
+}
+
+void
+rtsol_input(int s)
+{
+ int i;
+ int *hlimp = NULL;
+ struct icmp6_hdr *icp;
+ int ifindex = 0;
+ struct cmsghdr *cm;
+ struct in6_pktinfo *pi = NULL;
+ struct ifinfo *ifi = NULL;
+ u_char ntopbuf[INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ];
+
+ /* get message */
+ if ((i = recvmsg(s, &rcvmhdr, 0)) < 0) {
+ warnmsg(LOG_ERR, __FUNCTION__, "recvmsg: %s", strerror(errno));
+ return;
+ }
+
+ /* extract optional information via Advanced API */
+ for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&rcvmhdr);
+ cm;
+ cm = (struct cmsghdr *)CMSG_NXTHDR(&rcvmhdr, cm)) {
+ if (cm->cmsg_level == IPPROTO_IPV6 &&
+ cm->cmsg_type == IPV6_PKTINFO &&
+ cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) {
+ pi = (struct in6_pktinfo *)(CMSG_DATA(cm));
+ ifindex = pi->ipi6_ifindex;
+ }
+ if (cm->cmsg_level == IPPROTO_IPV6 &&
+ cm->cmsg_type == IPV6_HOPLIMIT &&
+ cm->cmsg_len == CMSG_LEN(sizeof(int)))
+ hlimp = (int *)CMSG_DATA(cm);
+ }
+
+ if (ifindex == 0) {
+ warnmsg(LOG_ERR,
+ __FUNCTION__, "failed to get receiving interface");
+ return;
+ }
+ if (hlimp == NULL) {
+ warnmsg(LOG_ERR,
+ __FUNCTION__, "failed to get receiving hop limit");
+ return;
+ }
+
+ if (i < sizeof(struct nd_router_advert)) {
+ warnmsg(LOG_ERR,
+ __FUNCTION__, "packet size(%d) is too short", i);
+ return;
+ }
+
+ icp = (struct icmp6_hdr *)rcvmhdr.msg_iov[0].iov_base;
+
+ if (icp->icmp6_type != ND_ROUTER_ADVERT) {
+ warnmsg(LOG_ERR, __FUNCTION__,
+ "invalid icmp type(%d) from %s on %s", icp->icmp6_type,
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ if_indextoname(pi->ipi6_ifindex, (char *)ifnamebuf));
+ return;
+ }
+
+ if (icp->icmp6_code != 0) {
+ warnmsg(LOG_ERR, __FUNCTION__,
+ "invalid icmp code(%d) from %s on %s", icp->icmp6_code,
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ if_indextoname(pi->ipi6_ifindex, (char *)ifnamebuf));
+ return;
+ }
+
+ if (*hlimp != 255) {
+ warnmsg(LOG_NOTICE, __FUNCTION__,
+ "invalid RA with hop limit(%d) from %s on %s",
+ *hlimp,
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ if_indextoname(pi->ipi6_ifindex, (char *)ifnamebuf));
+ return;
+ }
+
+ if (pi && !IN6_IS_ADDR_LINKLOCAL(&from.sin6_addr)) {
+ warnmsg(LOG_NOTICE, __FUNCTION__,
+ "invalid RA with non link-local source from %s on %s",
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ if_indextoname(pi->ipi6_ifindex, (char *)ifnamebuf));
+ return;
+ }
+
+ /* xxx: more validation? */
+
+ if ((ifi = find_ifinfo(pi->ipi6_ifindex)) == NULL) {
+ warnmsg(LOG_NOTICE, __FUNCTION__,
+ "received RA from %s on an unexpeced IF(%s)",
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ if_indextoname(pi->ipi6_ifindex, (char *)ifnamebuf));
+ return;
+ }
+
+ warnmsg(LOG_DEBUG, __FUNCTION__,
+ "received RA from %s on %s, state is %d",
+ inet_ntop(AF_INET6, &from.sin6_addr, (char *)ntopbuf,
+ INET6_ADDRSTRLEN),
+ ifi->ifname, ifi->state);
+
+ ifi->racnt++;
+
+ switch(ifi->state) {
+ case IFS_IDLE: /* should be ignored */
+ case IFS_DELAY: /* right? */
+ break;
+ case IFS_PROBE:
+ ifi->state = IFS_IDLE;
+ ifi->probes = 0;
+ rtsol_timer_update(ifi);
+ break;
+ }
+}
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