diff options
Diffstat (limited to 'usr.sbin/rtsold/rtsold.c')
-rw-r--r-- | usr.sbin/rtsold/rtsold.c | 887 |
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; -} |