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-rw-r--r--usr.sbin/rtsold/rtsold.c887
1 files changed, 0 insertions, 887 deletions
diff --git a/usr.sbin/rtsold/rtsold.c b/usr.sbin/rtsold/rtsold.c
deleted file mode 100644
index 0db050c..0000000
--- a/usr.sbin/rtsold/rtsold.c
+++ /dev/null
@@ -1,887 +0,0 @@
-/* $KAME: rtsold.c,v 1.67 2003/05/17 18:16:15 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/types.h>
-#include <sys/ioctl.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <sys/param.h>
-
-#include <net/if.h>
-#include <net/if_dl.h>
-#include <net/if_var.h>
-
-#include <netinet/in.h>
-#include <netinet/icmp6.h>
-#include <netinet/in_var.h>
-
-#include <netinet6/nd6.h>
-
-#include <signal.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <err.h>
-#include <stdarg.h>
-#include <ifaddrs.h>
-#ifdef HAVE_POLL_H
-#include <poll.h>
-#endif
-
-#include "rtsold.h"
-
-struct ifinfo *iflist;
-struct timeval tm_max = {0x7fffffff, 0x7fffffff};
-static int log_upto = 999;
-static int fflag = 0;
-
-int Fflag = 0; /* force setting sysctl parameters */
-int aflag = 0;
-int dflag = 0;
-
-char *otherconf_script;
-
-/* protocol constants */
-#define MAX_RTR_SOLICITATION_DELAY 1 /* second */
-#define RTR_SOLICITATION_INTERVAL 4 /* seconds */
-#define MAX_RTR_SOLICITATIONS 3 /* times */
-
-/*
- * implementation dependent constants in seconds
- * XXX: should be configurable
- */
-#define PROBE_INTERVAL 60
-
-int main(int, char **);
-
-/* static variables and functions */
-static int mobile_node = 0;
-#ifndef SMALL
-static int do_dump;
-static const char *dumpfilename = "/var/run/rtsold.dump"; /* XXX: should be configurable */
-#endif
-#if 1
-static const char *pidfilename = "/var/run/rtsold.pid"; /* should be configurable */
-#endif
-
-#if 0
-static int ifreconfig(char *);
-#endif
-static int make_packet(struct ifinfo *);
-static struct timeval *rtsol_check_timer(void);
-
-#ifndef SMALL
-static void rtsold_set_dump_file(int);
-#endif
-static void usage(char *);
-
-int
-main(int argc, char **argv)
-{
- int s, ch, once = 0;
- struct timeval *timeout;
- char *argv0;
- const char *opts;
-#ifdef HAVE_POLL_H
- struct pollfd set[2];
-#else
- fd_set *fdsetp, *selectfdp;
- int fdmasks;
- int maxfd;
-#endif
- int rtsock;
-
- /*
- * Initialization
- */
- argv0 = argv[0];
-
- /* get option */
- if (argv0 && argv0[strlen(argv0) - 1] != 'd') {
- fflag = 1;
- once = 1;
- opts = "adDFO:";
- } else
- opts = "adDfFm1O:";
-
- while ((ch = getopt(argc, argv, opts)) != -1) {
- switch (ch) {
- case 'a':
- aflag = 1;
- break;
- case 'd':
- dflag = 1;
- break;
- case 'D':
- dflag = 2;
- break;
- case 'f':
- fflag = 1;
- break;
- case 'F':
- Fflag = 1;
- break;
- case 'm':
- mobile_node = 1;
- break;
- case '1':
- once = 1;
- break;
- case 'O':
- otherconf_script = optarg;
- break;
- default:
- usage(argv0);
- /*NOTREACHED*/
- }
- }
- argc -= optind;
- argv += optind;
-
- if ((!aflag && argc == 0) || (aflag && argc != 0)) {
- usage(argv0);
- /*NOTREACHED*/
- }
-
- /* set log level */
- if (dflag == 0)
- log_upto = LOG_NOTICE;
- if (!fflag) {
- char *ident;
-
- ident = strrchr(argv0, '/');
- if (!ident)
- ident = argv0;
- else
- ident++;
- openlog(ident, LOG_NDELAY|LOG_PID, LOG_DAEMON);
- if (log_upto >= 0)
- setlogmask(LOG_UPTO(log_upto));
- }
-
- if (otherconf_script && *otherconf_script != '/') {
- errx(1, "configuration script (%s) must be an absolute path",
- otherconf_script);
- }
-
-#ifndef HAVE_ARC4RANDOM
- /* random value initialization */
- srandom((u_long)time(NULL));
-#endif
-
- if (Fflag) {
- setinet6sysctl(IPV6CTL_FORWARDING, 0);
- } else {
- /* warn if forwarding is up */
- if (getinet6sysctl(IPV6CTL_FORWARDING))
- warnx("kernel is configured as a router, not a host");
- }
-
-#ifndef SMALL
- /* initialization to dump internal status to a file */
- signal(SIGUSR1, rtsold_set_dump_file);
-#endif
-
- if (!fflag)
- daemon(0, 0); /* act as a daemon */
-
- /*
- * Open a socket for sending RS and receiving RA.
- * This should be done before calling ifinit(), since the function
- * uses the socket.
- */
- if ((s = sockopen()) < 0) {
- warnmsg(LOG_ERR, __func__, "failed to open a socket");
- exit(1);
- /*NOTREACHED*/
- }
-#ifdef HAVE_POLL_H
- set[0].fd = s;
- set[0].events = POLLIN;
-#else
- maxfd = s;
-#endif
-
-#ifdef HAVE_POLL_H
- set[1].fd = -1;
-#endif
-
- if ((rtsock = rtsock_open()) < 0) {
- warnmsg(LOG_ERR, __func__, "failed to open a socket");
- exit(1);
- /*NOTREACHED*/
- }
-#ifdef HAVE_POLL_H
- set[1].fd = rtsock;
- set[1].events = POLLIN;
-#else
- if (rtsock > maxfd)
- maxfd = rtsock;
-#endif
-
-#ifndef HAVE_POLL_H
- fdmasks = howmany(maxfd + 1, NFDBITS) * sizeof(fd_mask);
- if ((fdsetp = malloc(fdmasks)) == NULL) {
- err(1, "malloc");
- /*NOTREACHED*/
- }
- if ((selectfdp = malloc(fdmasks)) == NULL) {
- err(1, "malloc");
- /*NOTREACHED*/
- }
-#endif
-
- /* configuration per interface */
- if (ifinit()) {
- warnmsg(LOG_ERR, __func__,
- "failed to initialize interfaces");
- exit(1);
- /*NOTREACHED*/
- }
- if (aflag)
- argv = autoifprobe();
- while (argv && *argv) {
- if (ifconfig(*argv)) {
- warnmsg(LOG_ERR, __func__,
- "failed to initialize %s", *argv);
- exit(1);
- /*NOTREACHED*/
- }
- argv++;
- }
-
- /* setup for probing default routers */
- if (probe_init()) {
- warnmsg(LOG_ERR, __func__,
- "failed to setup for probing routers");
- exit(1);
- /*NOTREACHED*/
- }
-
-#if 1
- /* dump the current pid */
- if (!once) {
- pid_t pid = getpid();
- FILE *fp;
-
- if ((fp = fopen(pidfilename, "w")) == NULL)
- warnmsg(LOG_ERR, __func__,
- "failed to open a pid log file(%s): %s",
- pidfilename, strerror(errno));
- else {
- fprintf(fp, "%d\n", pid);
- fclose(fp);
- }
- }
-#endif
-
-#ifndef HAVE_POLL_H
- memset(fdsetp, 0, fdmasks);
- FD_SET(s, fdsetp);
- FD_SET(rtsock, fdsetp);
-#endif
- while (1) { /* main loop */
- int e;
-
-#ifndef HAVE_POLL_H
- memcpy(selectfdp, fdsetp, fdmasks);
-#endif
-
-#ifndef SMALL
- if (do_dump) { /* SIGUSR1 */
- do_dump = 0;
- rtsold_dump_file(dumpfilename);
- }
-#endif
-
- timeout = rtsol_check_timer();
-
- if (once) {
- struct ifinfo *ifi;
-
- /* if we have no timeout, we are done (or failed) */
- if (timeout == NULL)
- break;
-
- /* if all interfaces have got RA packet, we are done */
- for (ifi = iflist; ifi; ifi = ifi->next) {
- if (ifi->state != IFS_DOWN && ifi->racnt == 0)
- break;
- }
- if (ifi == NULL)
- break;
- }
-#ifdef HAVE_POLL_H
- e = poll(set, 2, timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFTIM);
-#else
- e = select(maxfd + 1, selectfdp, NULL, NULL, timeout);
-#endif
- if (e < 1) {
- if (e < 0 && errno != EINTR) {
- warnmsg(LOG_ERR, __func__, "select: %s",
- strerror(errno));
- }
- continue;
- }
-
- /* packet reception */
-#ifdef HAVE_POLL_H
- if (set[1].revents & POLLIN)
-#else
- if (FD_ISSET(rtsock, selectfdp))
-#endif
- rtsock_input(rtsock);
-#ifdef HAVE_POLL_H
- if (set[0].revents & POLLIN)
-#else
- if (FD_ISSET(s, selectfdp))
-#endif
- rtsol_input(s);
- }
- /* NOTREACHED */
-
- return 0;
-}
-
-int
-ifconfig(char *ifname)
-{
- struct ifinfo *ifinfo;
- struct sockaddr_dl *sdl;
- int flags;
-
- if ((sdl = if_nametosdl(ifname)) == NULL) {
- warnmsg(LOG_ERR, __func__,
- "failed to get link layer information for %s", ifname);
- return(-1);
- }
- if (find_ifinfo(sdl->sdl_index)) {
- warnmsg(LOG_ERR, __func__,
- "interface %s was already configured", ifname);
- free(sdl);
- return(-1);
- }
-
- if ((ifinfo = malloc(sizeof(*ifinfo))) == NULL) {
- warnmsg(LOG_ERR, __func__, "memory allocation failed");
- free(sdl);
- return(-1);
- }
- memset(ifinfo, 0, sizeof(*ifinfo));
- ifinfo->sdl = sdl;
-
- strlcpy(ifinfo->ifname, ifname, sizeof(ifinfo->ifname));
-
- /* construct a router solicitation message */
- if (make_packet(ifinfo))
- goto bad;
-
- /* set link ID of this interface. */
-#ifdef HAVE_SCOPELIB
- if (inet_zoneid(AF_INET6, 2, ifname, &ifinfo->linkid))
- goto bad;
-#else
- /* XXX: assume interface IDs as link IDs */
- ifinfo->linkid = ifinfo->sdl->sdl_index;
-#endif
-
- /*
- * check if the interface is available.
- * also check if SIOCGIFMEDIA ioctl is OK on the interface.
- */
- ifinfo->mediareqok = 1;
- ifinfo->active = interface_status(ifinfo);
- if (!ifinfo->mediareqok) {
- /*
- * probe routers periodically even if the link status
- * does not change.
- */
- ifinfo->probeinterval = PROBE_INTERVAL;
- }
-
- /* activate interface: interface_up returns 0 on success */
- flags = interface_up(ifinfo->ifname);
- if (flags == 0)
- ifinfo->state = IFS_DELAY;
- else if (flags == IFS_TENTATIVE)
- ifinfo->state = IFS_TENTATIVE;
- else
- ifinfo->state = IFS_DOWN;
-
- rtsol_timer_update(ifinfo);
-
- /* link into chain */
- if (iflist)
- ifinfo->next = iflist;
- iflist = ifinfo;
-
- return(0);
-
-bad:
- free(ifinfo->sdl);
- free(ifinfo);
- return(-1);
-}
-
-void
-iflist_init(void)
-{
- struct ifinfo *ifi, *next;
-
- for (ifi = iflist; ifi; ifi = next) {
- next = ifi->next;
- if (ifi->sdl)
- free(ifi->sdl);
- if (ifi->rs_data)
- free(ifi->rs_data);
- free(ifi);
- iflist = NULL;
- }
-}
-
-#if 0
-static int
-ifreconfig(char *ifname)
-{
- struct ifinfo *ifi, *prev;
- int rv;
-
- prev = NULL;
- for (ifi = iflist; ifi; ifi = ifi->next) {
- if (strncmp(ifi->ifname, ifname, sizeof(ifi->ifname)) == 0)
- break;
- prev = ifi;
- }
- prev->next = ifi->next;
-
- rv = ifconfig(ifname);
-
- /* reclaim it after ifconfig() in case ifname is pointer inside ifi */
- if (ifi->rs_data)
- free(ifi->rs_data);
- free(ifi->sdl);
- free(ifi);
- return rv;
-}
-#endif
-
-struct ifinfo *
-find_ifinfo(int ifindex)
-{
- struct ifinfo *ifi;
-
- for (ifi = iflist; ifi; ifi = ifi->next)
- if (ifi->sdl->sdl_index == ifindex)
- return(ifi);
- return(NULL);
-}
-
-static int
-make_packet(struct ifinfo *ifinfo)
-{
- size_t packlen = sizeof(struct nd_router_solicit), lladdroptlen = 0;
- struct nd_router_solicit *rs;
- char *buf;
-
- if ((lladdroptlen = lladdropt_length(ifinfo->sdl)) == 0) {
- warnmsg(LOG_INFO, __func__,
- "link-layer address option has null length"
- " on %s. Treat as not included.", ifinfo->ifname);
- }
- packlen += lladdroptlen;
- ifinfo->rs_datalen = packlen;
-
- /* allocate buffer */
- if ((buf = malloc(packlen)) == NULL) {
- warnmsg(LOG_ERR, __func__,
- "memory allocation failed for %s", ifinfo->ifname);
- return(-1);
- }
- ifinfo->rs_data = buf;
-
- /* fill in the message */
- rs = (struct nd_router_solicit *)buf;
- rs->nd_rs_type = ND_ROUTER_SOLICIT;
- rs->nd_rs_code = 0;
- rs->nd_rs_cksum = 0;
- rs->nd_rs_reserved = 0;
- buf += sizeof(*rs);
-
- /* fill in source link-layer address option */
- if (lladdroptlen)
- lladdropt_fill(ifinfo->sdl, (struct nd_opt_hdr *)buf);
-
- return(0);
-}
-
-static struct timeval *
-rtsol_check_timer(void)
-{
- static struct timeval returnval;
- struct timeval now, rtsol_timer;
- struct ifinfo *ifinfo;
- int flags;
-
- gettimeofday(&now, NULL);
-
- rtsol_timer = tm_max;
-
- for (ifinfo = iflist; ifinfo; ifinfo = ifinfo->next) {
- if (timercmp(&ifinfo->expire, &now, <=)) {
- if (dflag > 1)
- warnmsg(LOG_DEBUG, __func__,
- "timer expiration on %s, "
- "state = %d", ifinfo->ifname,
- ifinfo->state);
-
- switch (ifinfo->state) {
- case IFS_DOWN:
- case IFS_TENTATIVE:
- /* interface_up returns 0 on success */
- flags = interface_up(ifinfo->ifname);
- if (flags == 0)
- ifinfo->state = IFS_DELAY;
- else if (flags == IFS_TENTATIVE)
- ifinfo->state = IFS_TENTATIVE;
- else
- ifinfo->state = IFS_DOWN;
- break;
- case IFS_IDLE:
- {
- int oldstatus = ifinfo->active;
- int probe = 0;
-
- ifinfo->active = interface_status(ifinfo);
-
- if (oldstatus != ifinfo->active) {
- warnmsg(LOG_DEBUG, __func__,
- "%s status is changed"
- " from %d to %d",
- ifinfo->ifname,
- oldstatus, ifinfo->active);
- probe = 1;
- ifinfo->state = IFS_DELAY;
- } else if (ifinfo->probeinterval &&
- (ifinfo->probetimer -=
- ifinfo->timer.tv_sec) <= 0) {
- /* probe timer expired */
- ifinfo->probetimer =
- ifinfo->probeinterval;
- probe = 1;
- ifinfo->state = IFS_PROBE;
- }
-
- /*
- * If we need a probe, clear the previous
- * status wrt the "other" configuration.
- */
- if (probe)
- ifinfo->otherconfig = 0;
-
- if (probe && mobile_node)
- defrouter_probe(ifinfo);
- break;
- }
- case IFS_DELAY:
- ifinfo->state = IFS_PROBE;
- sendpacket(ifinfo);
- break;
- case IFS_PROBE:
- if (ifinfo->probes < MAX_RTR_SOLICITATIONS)
- sendpacket(ifinfo);
- else {
- warnmsg(LOG_INFO, __func__,
- "No answer after sending %d RSs",
- ifinfo->probes);
- ifinfo->probes = 0;
- ifinfo->state = IFS_IDLE;
- }
- break;
- }
- rtsol_timer_update(ifinfo);
- }
-
- if (timercmp(&ifinfo->expire, &rtsol_timer, <))
- rtsol_timer = ifinfo->expire;
- }
-
- if (timercmp(&rtsol_timer, &tm_max, ==)) {
- warnmsg(LOG_DEBUG, __func__, "there is no timer");
- return(NULL);
- } else if (timercmp(&rtsol_timer, &now, <))
- /* this may occur when the interval is too small */
- returnval.tv_sec = returnval.tv_usec = 0;
- else
- timersub(&rtsol_timer, &now, &returnval);
-
- if (dflag > 1)
- warnmsg(LOG_DEBUG, __func__, "New timer is %ld:%08ld",
- (long)returnval.tv_sec, (long)returnval.tv_usec);
-
- return(&returnval);
-}
-
-void
-rtsol_timer_update(struct ifinfo *ifinfo)
-{
-#define MILLION 1000000
-#define DADRETRY 10 /* XXX: adhoc */
- long interval;
- struct timeval now;
-
- bzero(&ifinfo->timer, sizeof(ifinfo->timer));
-
- switch (ifinfo->state) {
- case IFS_DOWN:
- case IFS_TENTATIVE:
- if (++ifinfo->dadcount > DADRETRY) {
- ifinfo->dadcount = 0;
- ifinfo->timer.tv_sec = PROBE_INTERVAL;
- } else
- ifinfo->timer.tv_sec = 1;
- break;
- case IFS_IDLE:
- if (mobile_node) {
- /* XXX should be configurable */
- ifinfo->timer.tv_sec = 3;
- }
- else
- ifinfo->timer = tm_max; /* stop timer(valid?) */
- break;
- case IFS_DELAY:
-#ifndef HAVE_ARC4RANDOM
- interval = random() % (MAX_RTR_SOLICITATION_DELAY * MILLION);
-#else
- interval = arc4random_uniform(MAX_RTR_SOLICITATION_DELAY * MILLION);
-#endif
- ifinfo->timer.tv_sec = interval / MILLION;
- ifinfo->timer.tv_usec = interval % MILLION;
- break;
- case IFS_PROBE:
- if (ifinfo->probes < MAX_RTR_SOLICITATIONS)
- ifinfo->timer.tv_sec = RTR_SOLICITATION_INTERVAL;
- else {
- /*
- * After sending MAX_RTR_SOLICITATIONS solicitations,
- * we're just waiting for possible replies; there
- * will be no more solicitation. Thus, we change
- * the timer value to MAX_RTR_SOLICITATION_DELAY based
- * on RFC 2461, Section 6.3.7.
- */
- ifinfo->timer.tv_sec = MAX_RTR_SOLICITATION_DELAY;
- }
- break;
- default:
- warnmsg(LOG_ERR, __func__,
- "illegal interface state(%d) on %s",
- ifinfo->state, ifinfo->ifname);
- return;
- }
-
- /* reset the timer */
- if (timercmp(&ifinfo->timer, &tm_max, ==)) {
- ifinfo->expire = tm_max;
- warnmsg(LOG_DEBUG, __func__,
- "stop timer for %s", ifinfo->ifname);
- } else {
- gettimeofday(&now, NULL);
- timeradd(&now, &ifinfo->timer, &ifinfo->expire);
-
- if (dflag > 1)
- warnmsg(LOG_DEBUG, __func__,
- "set timer for %s to %d:%d", ifinfo->ifname,
- (int)ifinfo->timer.tv_sec,
- (int)ifinfo->timer.tv_usec);
- }
-
-#undef MILLION
-}
-
-/* timer related utility functions */
-#define MILLION 1000000
-
-#ifndef SMALL
-static void
-rtsold_set_dump_file(int sig __unused)
-{
- do_dump = 1;
-}
-#endif
-
-static void
-usage(char *progname)
-{
- if (progname && progname[strlen(progname) - 1] != 'd') {
- fprintf(stderr, "usage: rtsol [-dDF] interfaces...\n");
- fprintf(stderr, "usage: rtsol [-dDF] -a\n");
- } else {
- fprintf(stderr, "usage: rtsold [-adDfFm1] interfaces...\n");
- fprintf(stderr, "usage: rtsold [-dDfFm1] -a\n");
- }
- exit(1);
-}
-
-void
-#if __STDC__
-warnmsg(int priority, const char *func, const char *msg, ...)
-#else
-warnmsg(priority, func, msg, va_alist)
- int priority;
- const char *func;
- const char *msg;
- va_dcl
-#endif
-{
- va_list ap;
- char buf[BUFSIZ];
-
- va_start(ap, msg);
- if (fflag) {
- if (priority <= log_upto) {
- (void)vfprintf(stderr, msg, ap);
- (void)fprintf(stderr, "\n");
- }
- } else {
- snprintf(buf, sizeof(buf), "<%s> %s", func, msg);
- msg = buf;
- vsyslog(priority, msg, ap);
- }
- va_end(ap);
-}
-
-/*
- * return a list of interfaces which is suitable to sending an RS.
- */
-char **
-autoifprobe(void)
-{
- static char **argv = NULL;
- static int n = 0;
- char **a;
- int s = 0, i, found;
- struct ifaddrs *ifap, *ifa, *target;
- struct in6_ndireq nd;
-
- /* initialize */
- while (n--)
- free(argv[n]);
- if (argv) {
- free(argv);
- argv = NULL;
- }
- n = 0;
-
- if (getifaddrs(&ifap) != 0)
- return NULL;
-
- if (!Fflag && (s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
- err(1, "socket");
- /* NOTREACHED */
- }
-
- target = NULL;
- /* find an ethernet */
- for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
- if ((ifa->ifa_flags & IFF_UP) == 0)
- continue;
- if ((ifa->ifa_flags & IFF_POINTOPOINT) != 0)
- continue;
- if ((ifa->ifa_flags & IFF_LOOPBACK) != 0)
- continue;
- if ((ifa->ifa_flags & IFF_MULTICAST) == 0)
- continue;
-
- if (ifa->ifa_addr->sa_family != AF_INET6)
- continue;
-
- found = 0;
- for (i = 0; i < n; i++) {
- if (strcmp(argv[i], ifa->ifa_name) == 0) {
- found++;
- break;
- }
- }
- if (found)
- continue;
-
- /*
- * Skip the interfaces which IPv6 and/or accepting RA
- * is disabled.
- */
- if (!Fflag) {
- memset(&nd, 0, sizeof(nd));
- strlcpy(nd.ifname, ifa->ifa_name, sizeof(nd.ifname));
- if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
- err(1, "ioctl(SIOCGIFINFO_IN6)");
- /* NOTREACHED */
- }
- if ((nd.ndi.flags & ND6_IFF_IFDISABLED))
- continue;
- if (!(nd.ndi.flags & ND6_IFF_ACCEPT_RTADV))
- continue;
- }
-
- /* if we find multiple candidates, just warn. */
- if (n != 0 && dflag > 1)
- warnx("multiple interfaces found");
-
- a = (char **)realloc(argv, (n + 1) * sizeof(char **));
- if (a == NULL)
- err(1, "realloc");
- argv = a;
- argv[n] = strdup(ifa->ifa_name);
- if (!argv[n])
- err(1, "malloc");
- n++;
- }
-
- if (n) {
- a = (char **)realloc(argv, (n + 1) * sizeof(char **));
- if (a == NULL)
- err(1, "realloc");
- argv = a;
- argv[n] = NULL;
-
- if (dflag > 0) {
- for (i = 0; i < n; i++)
- warnx("probing %s", argv[i]);
- }
- }
- if (!Fflag)
- close(s);
- freeifaddrs(ifap);
- return argv;
-}
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