1 files changed, 221 insertions, 0 deletions
diff --git a/network_cmds/rtsol.tproj/probe.c b/network_cmds/rtsol.tproj/probe.c
new file mode 100644
index 0000000..305d0a2
--- /dev/null
+++ b/network_cmds/rtsol.tproj/probe.c
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/*	$KAME: probe.c,v 1.10 2000/08/13 06:14:59 itojun Exp $	*/
+
+/*
+ * Copyright (C) 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/probe.c,v 1.2.2.3 2001/07/03 11:02:16 ume Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <sys/queue.h>
+
+#include <net/if.h>
+#if defined(__FreeBSD__) && __FreeBSD__ >= 3
+#include <net/if_var.h>
+#endif /* __FreeBSD__ >= 3 */
+
+#include <netinet/in.h>
+#include <netinet6/in6_var.h>
+#include <netinet/icmp6.h>
+#include <netinet6/nd6.h>
+
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdlib.h>
+
+#include "rtsold.h"
+
+static struct msghdr sndmhdr;
+static struct iovec sndiov[2];
+static int probesock;
+static void sendprobe __P((struct in6_addr *addr, int ifindex));
+
+
+int
+probe_init()
+{
+	int scmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
+		CMSG_SPACE(sizeof(int));
+	static u_char *sndcmsgbuf = NULL;
+	
+	if (sndcmsgbuf == NULL &&
+	    (sndcmsgbuf = (u_char *)malloc(scmsglen)) == NULL) {
+		warnmsg(LOG_ERR, __FUNCTION__, "malloc failed");
+		return(-1);
+	}
+
+	if ((probesock = socket(AF_INET6, SOCK_RAW, IPPROTO_NONE)) < 0) {
+		warnmsg(LOG_ERR, __FUNCTION__, "socket: %s", strerror(errno));
+		return(-1);
+	}
+
+#ifndef __APPLE__
+	/* make the socket send-only */
+	if (shutdown(probesock, 0)) {
+		warnmsg(LOG_ERR, __FUNCTION__, "shutdown: %s", strerror(errno));
+		return(-1);
+	}
+#endif /* __APPLE__ */
+
+	/* 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 = scmsglen;
+
+	return(0);
+}
+
+/*
+ * Probe if each router in the default router list is still alive. 
+ */
+void
+defrouter_probe(int ifindex)
+{
+	struct in6_drlist dr;
+	int s, i;
+	u_char ntopbuf[INET6_ADDRSTRLEN];
+
+	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+		warnmsg(LOG_ERR, __FUNCTION__, "socket: %s", strerror(errno));
+		return;
+	}
+	bzero(&dr, sizeof(dr));
+	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy interface */
+	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
+		warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGDRLST_IN6): %s",
+		       strerror(errno));
+		goto closeandend;
+	}
+
+	for(i = 0; dr.defrouter[i].if_index && i < PRLSTSIZ; i++) {
+		if (ifindex && dr.defrouter[i].if_index == ifindex) {
+			/* sanity check */
+			if (!IN6_IS_ADDR_LINKLOCAL(&dr.defrouter[i].rtaddr)) {
+				warnmsg(LOG_ERR, __FUNCTION__,
+					"default router list contains a "
+					"non-linklocal address(%s)",
+				       inet_ntop(AF_INET6,
+						 &dr.defrouter[i].rtaddr,
+						 (char *)ntopbuf, INET6_ADDRSTRLEN));
+				continue; /* ignore the address */
+			}
+			sendprobe(&dr.defrouter[i].rtaddr,
+				  dr.defrouter[i].if_index);
+		}
+	}
+
+  closeandend:
+	close(s);
+	return;
+}
+
+static void
+sendprobe(struct in6_addr *addr, int ifindex)
+{
+	struct sockaddr_in6 sa6_probe;
+	struct in6_pktinfo *pi;
+	struct cmsghdr *cm;
+	u_char ntopbuf[INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ];;
+
+	bzero(&sa6_probe, sizeof(sa6_probe));
+	sa6_probe.sin6_family = AF_INET6;
+	sa6_probe.sin6_len = sizeof(sa6_probe);
+	sa6_probe.sin6_addr = *addr;
+
+	sndmhdr.msg_name = (caddr_t)&sa6_probe;
+	sndmhdr.msg_iov[0].iov_base = NULL;
+	sndmhdr.msg_iov[0].iov_len = 0;
+
+	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 = ifindex;
+
+	/* specify the hop limit of the packet for safety */
+	{
+		int hoplimit = 1;
+
+		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__, "probe a router %s on %s",
+	       inet_ntop(AF_INET6, addr, (char *)ntopbuf, INET6_ADDRSTRLEN),
+	       if_indextoname(ifindex, (char *)ifnamebuf));
+
+	if (sendmsg(probesock, &sndmhdr, 0))
+		warnmsg(LOG_ERR, __FUNCTION__, "sendmsg on %s: %s",
+			if_indextoname(ifindex, (char *)ifnamebuf), strerror(errno));
+
+	return;
+}