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-rw-r--r--usr.sbin/rtsold/rtsol.c473
1 files changed, 0 insertions, 473 deletions
diff --git a/usr.sbin/rtsold/rtsol.c b/usr.sbin/rtsold/rtsol.c
deleted file mode 100644
index be2a9b8..0000000
--- a/usr.sbin/rtsold/rtsol.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/* $KAME: rtsol.c,v 1.27 2003/10/05 00:09:36 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.
- *
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <sys/time.h>
-#include <sys/queue.h>
-#include <sys/wait.h>
-#include <sys/stat.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 <fcntl.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;
-static int rcvcmsglen;
-
-int rssock;
-
-static struct sockaddr_in6 sin6_allrouters = {
- .sin6_len = sizeof(sin6_allrouters),
- .sin6_family = AF_INET6,
-};
-
-static void call_script(char *, char *);
-static int safefile(const char *);
-
-int
-sockopen(void)
-{
- static u_char *rcvcmsgbuf = NULL, *sndcmsgbuf = NULL;
- int sndcmsglen, on;
- static u_char answer[1500];
- struct icmp6_filter filt;
-
- sndcmsglen = rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
- CMSG_SPACE(sizeof(int));
- if (rcvcmsgbuf == NULL && (rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) {
- warnmsg(LOG_ERR, __func__,
- "malloc for receive msghdr failed");
- return(-1);
- }
- if (sndcmsgbuf == NULL && (sndcmsgbuf = malloc(sndcmsglen)) == NULL) {
- warnmsg(LOG_ERR, __func__,
- "malloc for send msghdr failed");
- return(-1);
- }
- memset(&sin6_allrouters, 0, sizeof(struct sockaddr_in6));
- sin6_allrouters.sin6_family = AF_INET6;
- sin6_allrouters.sin6_len = sizeof(sin6_allrouters);
- if (inet_pton(AF_INET6, ALLROUTER,
- &sin6_allrouters.sin6_addr.s6_addr) != 1) {
- warnmsg(LOG_ERR, __func__, "inet_pton failed for %s",
- ALLROUTER);
- return(-1);
- }
-
- if ((rssock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
- warnmsg(LOG_ERR, __func__, "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, __func__, "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, __func__, "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, __func__, "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, __func__, "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, __func__, "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_iov = rcviov;
- rcvmhdr.msg_iovlen = 1;
- rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
-
- /* 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)
-{
- struct in6_pktinfo *pi;
- struct cmsghdr *cm;
- int hoplimit = 255;
- ssize_t i;
- struct sockaddr_in6 dst;
-
- dst = sin6_allrouters;
- dst.sin6_scope_id = ifinfo->linkid;
-
- sndmhdr.msg_name = (caddr_t)&dst;
- 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 */
- 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, __func__,
- "send RS on %s, whose state is %d",
- ifinfo->ifname, ifinfo->state);
- i = sendmsg(rssock, &sndmhdr, 0);
- if (i < 0 || (size_t)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, __func__, "sendmsg on %s: %s",
- ifinfo->ifname, strerror(errno));
- }
-
- /* update counter */
- ifinfo->probes++;
-}
-
-void
-rtsol_input(int s)
-{
- u_char ntopbuf[INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ];
- int ifindex = 0, *hlimp = NULL;
- ssize_t i;
- struct in6_pktinfo *pi = NULL;
- struct ifinfo *ifi = NULL;
- struct icmp6_hdr *icp;
- struct nd_router_advert *nd_ra;
- struct cmsghdr *cm;
-
- /* get message. namelen and controllen must always be initialized. */
- rcvmhdr.msg_namelen = sizeof(from);
- rcvmhdr.msg_controllen = rcvcmsglen;
- if ((i = recvmsg(s, &rcvmhdr, 0)) < 0) {
- warnmsg(LOG_ERR, __func__, "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, __func__,
- "failed to get receiving interface");
- return;
- }
- if (hlimp == NULL) {
- warnmsg(LOG_ERR, __func__,
- "failed to get receiving hop limit");
- return;
- }
-
- if ((size_t)i < sizeof(struct nd_router_advert)) {
- warnmsg(LOG_INFO, __func__,
- "packet size(%zd) is too short", i);
- return;
- }
-
- icp = (struct icmp6_hdr *)rcvmhdr.msg_iov[0].iov_base;
-
- if (icp->icmp6_type != ND_ROUTER_ADVERT) {
- /*
- * this should not happen because we configured a filter
- * that only passes RAs on the receiving socket.
- */
- warnmsg(LOG_ERR, __func__,
- "invalid icmp type(%d) from %s on %s", icp->icmp6_type,
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf,
- INET6_ADDRSTRLEN),
- if_indextoname(pi->ipi6_ifindex, ifnamebuf));
- return;
- }
-
- if (icp->icmp6_code != 0) {
- warnmsg(LOG_INFO, __func__,
- "invalid icmp code(%d) from %s on %s", icp->icmp6_code,
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf,
- INET6_ADDRSTRLEN),
- if_indextoname(pi->ipi6_ifindex, ifnamebuf));
- return;
- }
-
- if (*hlimp != 255) {
- warnmsg(LOG_INFO, __func__,
- "invalid RA with hop limit(%d) from %s on %s",
- *hlimp,
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf,
- INET6_ADDRSTRLEN),
- if_indextoname(pi->ipi6_ifindex, ifnamebuf));
- return;
- }
-
- if (pi && !IN6_IS_ADDR_LINKLOCAL(&from.sin6_addr)) {
- warnmsg(LOG_INFO, __func__,
- "invalid RA with non link-local source from %s on %s",
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf,
- INET6_ADDRSTRLEN),
- if_indextoname(pi->ipi6_ifindex, ifnamebuf));
- return;
- }
-
- /* xxx: more validation? */
-
- if ((ifi = find_ifinfo(pi->ipi6_ifindex)) == NULL) {
- warnmsg(LOG_INFO, __func__,
- "received RA from %s on an unexpected IF(%s)",
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf,
- INET6_ADDRSTRLEN),
- if_indextoname(pi->ipi6_ifindex, ifnamebuf));
- return;
- }
-
- warnmsg(LOG_DEBUG, __func__,
- "received RA from %s on %s, state is %d",
- inet_ntop(AF_INET6, &from.sin6_addr, ntopbuf, INET6_ADDRSTRLEN),
- ifi->ifname, ifi->state);
-
- nd_ra = (struct nd_router_advert *)icp;
-
- /*
- * Process the "O bit."
- * If the value of OtherConfigFlag changes from FALSE to TRUE, the
- * host should invoke the stateful autoconfiguration protocol,
- * requesting information.
- * [RFC 2462 Section 5.5.3]
- */
- if (((nd_ra->nd_ra_flags_reserved) & ND_RA_FLAG_OTHER) &&
- !ifi->otherconfig) {
- warnmsg(LOG_DEBUG, __func__,
- "OtherConfigFlag on %s is turned on", ifi->ifname);
- ifi->otherconfig = 1;
- call_script(otherconf_script, ifi->ifname);
- }
-
- 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;
- }
-}
-
-static void
-call_script(char *scriptpath, char *ifname)
-{
- pid_t pid, wpid;
-
- if (scriptpath == NULL)
- return;
-
- /* launch the script */
- pid = fork();
- if (pid < 0) {
- warnmsg(LOG_ERR, __func__,
- "failed to fork: %s", strerror(errno));
- return;
- } else if (pid) {
- int wstatus;
-
- do {
- wpid = wait(&wstatus);
- } while (wpid != pid && wpid > 0);
-
- if (wpid < 0)
- warnmsg(LOG_ERR, __func__,
- "wait: %s", strerror(errno));
- else {
- warnmsg(LOG_DEBUG, __func__,
- "script \"%s\" terminated", scriptpath);
- }
- } else {
- char *argv[3];
- int fd;
-
- argv[0] = scriptpath;
- argv[1] = ifname;
- argv[2] = NULL;
-
- if (safefile(scriptpath)) {
- warnmsg(LOG_ERR, __func__,
- "script \"%s\" cannot be executed safely",
- scriptpath);
- exit(1);
- }
-
- if ((fd = open("/dev/null", O_RDWR)) != -1) {
- dup2(fd, STDIN_FILENO);
- dup2(fd, STDOUT_FILENO);
- dup2(fd, STDERR_FILENO);
- if (fd > STDERR_FILENO)
- close(fd);
- }
-
- execv(scriptpath, argv);
-
- warnmsg(LOG_ERR, __func__, "child: exec failed: %s",
- strerror(errno));
- exit(0);
- }
-
- return;
-}
-
-static int
-safefile(const char *path)
-{
- struct stat s;
- uid_t myuid;
-
- /* no setuid */
- if (getuid() != geteuid()) {
- warnmsg(LOG_NOTICE, __func__,
- "setuid'ed execution not allowed\n");
- return (-1);
- }
-
- if (lstat(path, &s) != 0) {
- warnmsg(LOG_NOTICE, __func__, "lstat failed: %s",
- strerror(errno));
- return (-1);
- }
-
- /* the file must be owned by the running uid */
- myuid = getuid();
- if (s.st_uid != myuid) {
- warnmsg(LOG_NOTICE, __func__,
- "%s has invalid owner uid\n", path);
- return (-1);
- }
-
- switch (s.st_mode & S_IFMT) {
- case S_IFREG:
- break;
- default:
- warnmsg(LOG_NOTICE, __func__,
- "%s is an invalid file type 0x%o\n",
- path, (s.st_mode & S_IFMT));
- return (-1);
- }
-
- return (0);
-}
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