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c2e12e3f94
PR: bin/155175 Submitted by: Peter J. Philipp <pjp centroid.eu> MFC after: 3 days
909 lines
20 KiB
C
909 lines
20 KiB
C
/* $KAME: faithd.c,v 1.67 2003/10/16 05:26:21 itojun Exp $ */
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/*
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* Copyright (C) 1997 and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* User level translator from IPv6 to IPv4.
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*
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* Usage: faithd [<port> <progpath> <arg1(progname)> <arg2> ...]
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* e.g. faithd telnet /usr/libexec/telnetd telnetd
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <libutil.h>
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#ifdef HAVE_POLL_H
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#include <poll.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <net/if_types.h>
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#ifdef IFT_FAITH
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# define USE_ROUTE
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# include <net/if.h>
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# include <net/route.h>
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# include <net/if_dl.h>
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#endif
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <ifaddrs.h>
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#include "faithd.h"
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#include "prefix.h"
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char *serverpath = NULL;
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char *serverarg[MAXARGV + 1];
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static char *faithdname = NULL;
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char logname[BUFSIZ];
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char procname[BUFSIZ];
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struct myaddrs {
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struct myaddrs *next;
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struct sockaddr *addr;
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};
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struct myaddrs *myaddrs = NULL;
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static const char *service;
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#ifdef USE_ROUTE
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static int sockfd = 0;
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#endif
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int dflag = 0;
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static int pflag = 0;
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static int inetd = 0;
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static char *configfile = NULL;
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int main(int, char **);
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static int inetd_main(int, char **);
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static int daemon_main(int, char **);
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static void play_service(int);
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static void play_child(int, struct sockaddr *);
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static int faith_prefix(struct sockaddr *);
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static int map6to4(struct sockaddr_in6 *, struct sockaddr_in *);
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static void sig_child(int);
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static void sig_terminate(int);
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static void start_daemon(void);
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static void exit_stderr(const char *, ...)
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__attribute__((__format__(__printf__, 1, 2)));
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static void grab_myaddrs(void);
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static void free_myaddrs(void);
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static void update_myaddrs(void);
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static void usage(void);
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int
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main(int argc, char **argv)
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{
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/*
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* Initializing stuff
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*/
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faithdname = strrchr(argv[0], '/');
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if (faithdname)
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faithdname++;
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else
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faithdname = argv[0];
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if (strcmp(faithdname, "faithd") != 0) {
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inetd = 1;
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return inetd_main(argc, argv);
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} else
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return daemon_main(argc, argv);
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}
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static int
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inetd_main(int argc, char **argv)
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{
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char path[MAXPATHLEN];
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struct sockaddr_storage me;
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struct sockaddr_storage from;
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socklen_t melen, fromlen;
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int i;
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int error;
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const int on = 1;
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char sbuf[NI_MAXSERV], snum[NI_MAXSERV];
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if (config_load(configfile) < 0 && configfile) {
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exit_failure("could not load config file");
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/*NOTREACHED*/
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}
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if (strrchr(argv[0], '/') == NULL)
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snprintf(path, sizeof(path), "%s/%s", DEFAULT_DIR, argv[0]);
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else
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snprintf(path, sizeof(path), "%s", argv[0]);
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#ifdef USE_ROUTE
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grab_myaddrs();
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sockfd = socket(PF_ROUTE, SOCK_RAW, PF_UNSPEC);
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if (sockfd < 0) {
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exit_failure("socket(PF_ROUTE): %s", strerror(errno));
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/*NOTREACHED*/
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}
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#endif
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melen = sizeof(me);
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if (getsockname(STDIN_FILENO, (struct sockaddr *)&me, &melen) < 0) {
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exit_failure("getsockname: %s", strerror(errno));
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/*NOTREACHED*/
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}
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fromlen = sizeof(from);
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if (getpeername(STDIN_FILENO, (struct sockaddr *)&from, &fromlen) < 0) {
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exit_failure("getpeername: %s", strerror(errno));
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/*NOTREACHED*/
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}
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if (getnameinfo((struct sockaddr *)&me, melen, NULL, 0,
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sbuf, sizeof(sbuf), NI_NUMERICHOST) == 0)
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service = sbuf;
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else
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service = DEFAULT_PORT_NAME;
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if (getnameinfo((struct sockaddr *)&me, melen, NULL, 0,
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snum, sizeof(snum), NI_NUMERICHOST) != 0)
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snprintf(snum, sizeof(snum), "?");
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snprintf(logname, sizeof(logname), "faithd %s", snum);
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snprintf(procname, sizeof(procname), "accepting port %s", snum);
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openlog(logname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
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if (argc >= MAXARGV) {
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exit_failure("too many arguments");
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/*NOTREACHED*/
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}
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serverarg[0] = serverpath = path;
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for (i = 1; i < argc; i++)
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serverarg[i] = argv[i];
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serverarg[i] = NULL;
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error = setsockopt(STDIN_FILENO, SOL_SOCKET, SO_OOBINLINE, &on,
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sizeof(on));
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if (error < 0) {
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exit_failure("setsockopt(SO_OOBINLINE): %s", strerror(errno));
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/*NOTREACHED*/
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}
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play_child(STDIN_FILENO, (struct sockaddr *)&from);
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exit_failure("should not reach here");
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return 0; /*dummy!*/
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}
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static int
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daemon_main(int argc, char **argv)
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{
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struct addrinfo hints, *res;
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int s_wld, error, i, serverargc, on = 1;
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int family = AF_INET6;
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int c;
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while ((c = getopt(argc, argv, "df:p")) != -1) {
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switch (c) {
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case 'd':
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dflag++;
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break;
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case 'f':
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configfile = optarg;
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break;
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case 'p':
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pflag++;
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break;
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default:
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usage();
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/*NOTREACHED*/
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}
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}
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argc -= optind;
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argv += optind;
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if (config_load(configfile) < 0 && configfile) {
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exit_failure("could not load config file");
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/*NOTREACHED*/
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}
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#ifdef USE_ROUTE
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grab_myaddrs();
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#endif
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switch (argc) {
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case 0:
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usage();
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/*NOTREACHED*/
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default:
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serverargc = argc - NUMARG;
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if (serverargc >= MAXARGV)
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exit_stderr("too many arguments");
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serverpath = strdup(argv[NUMPRG]);
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if (!serverpath)
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exit_stderr("not enough core");
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for (i = 0; i < serverargc; i++) {
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serverarg[i] = strdup(argv[i + NUMARG]);
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if (!serverarg[i])
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exit_stderr("not enough core");
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}
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serverarg[i] = NULL;
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/* fall throuth */
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case 1: /* no local service */
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service = argv[NUMPRT];
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break;
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}
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start_daemon();
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/*
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* Opening wild card socket for this service.
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*/
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = family;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP; /* SCTP? */
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error = getaddrinfo(NULL, service, &hints, &res);
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if (error)
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exit_failure("getaddrinfo: %s", gai_strerror(error));
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s_wld = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (s_wld == -1)
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exit_failure("socket: %s", strerror(errno));
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#ifdef IPV6_FAITH
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if (res->ai_family == AF_INET6) {
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error = setsockopt(s_wld, IPPROTO_IPV6, IPV6_FAITH, &on, sizeof(on));
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if (error == -1)
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exit_failure("setsockopt(IPV6_FAITH): %s",
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strerror(errno));
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}
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#endif
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error = setsockopt(s_wld, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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if (error == -1)
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exit_failure("setsockopt(SO_REUSEADDR): %s", strerror(errno));
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error = setsockopt(s_wld, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on));
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if (error == -1)
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exit_failure("setsockopt(SO_OOBINLINE): %s", strerror(errno));
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#ifdef IPV6_V6ONLY
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error = setsockopt(s_wld, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
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if (error == -1)
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exit_failure("setsockopt(IPV6_V6ONLY): %s", strerror(errno));
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#endif
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error = bind(s_wld, (struct sockaddr *)res->ai_addr, res->ai_addrlen);
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if (error == -1)
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exit_failure("bind: %s", strerror(errno));
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error = listen(s_wld, 5);
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if (error == -1)
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exit_failure("listen: %s", strerror(errno));
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#ifdef USE_ROUTE
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sockfd = socket(PF_ROUTE, SOCK_RAW, PF_UNSPEC);
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if (sockfd < 0) {
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exit_failure("socket(PF_ROUTE): %s", strerror(errno));
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/*NOTREACHED*/
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}
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#endif
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/*
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* Everything is OK.
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*/
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snprintf(logname, sizeof(logname), "faithd %s", service);
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snprintf(procname, sizeof(procname), "accepting port %s", service);
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openlog(logname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
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syslog(LOG_INFO, "Starting faith daemon for %s port", service);
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play_service(s_wld);
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/* NOTREACHED */
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exit(1); /*pacify gcc*/
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}
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static void
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play_service(int s_wld)
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{
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struct sockaddr_storage srcaddr;
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socklen_t len;
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int s_src;
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pid_t child_pid;
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#ifdef HAVE_POLL_H
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struct pollfd pfd[2];
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#else
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fd_set rfds;
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int maxfd;
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#endif
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int error;
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/*
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* Wait, accept, fork, faith....
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*/
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again:
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setproctitle("%s", procname);
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#ifdef HAVE_POLL_H
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pfd[0].fd = s_wld;
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pfd[0].events = POLLIN;
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pfd[1].fd = -1;
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pfd[1].revents = 0;
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#else
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FD_ZERO(&rfds);
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if (s_wld >= FD_SETSIZE)
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exit_failure("descriptor too big");
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FD_SET(s_wld, &rfds);
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maxfd = s_wld;
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#endif
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#ifdef USE_ROUTE
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if (sockfd) {
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#ifdef HAVE_POLL_H
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pfd[1].fd = sockfd;
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pfd[1].events = POLLIN;
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#else
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if (sockfd >= FD_SETSIZE)
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exit_failure("descriptor too big");
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FD_SET(sockfd, &rfds);
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maxfd = (maxfd < sockfd) ? sockfd : maxfd;
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#endif
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}
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#endif
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#ifdef HAVE_POLL_H
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error = poll(pfd, sizeof(pfd)/sizeof(pfd[0]), INFTIM);
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#else
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error = select(maxfd + 1, &rfds, NULL, NULL, NULL);
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#endif
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if (error < 0) {
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if (errno == EINTR)
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goto again;
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exit_failure("select: %s", strerror(errno));
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/*NOTREACHED*/
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}
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#ifdef USE_ROUTE
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#ifdef HAVE_POLL_H
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if (pfd[1].revents & POLLIN)
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#else
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if (FD_ISSET(sockfd, &rfds))
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#endif
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{
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update_myaddrs();
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}
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#endif
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#ifdef HAVE_POLL_H
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if (pfd[0].revents & POLLIN)
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#else
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if (FD_ISSET(s_wld, &rfds))
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#endif
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{
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len = sizeof(srcaddr);
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s_src = accept(s_wld, (struct sockaddr *)&srcaddr, &len);
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if (s_src < 0) {
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if (errno == ECONNABORTED)
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goto again;
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exit_failure("socket: %s", strerror(errno));
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/*NOTREACHED*/
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}
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if (srcaddr.ss_family == AF_INET6 &&
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IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&srcaddr)->sin6_addr)) {
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close(s_src);
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syslog(LOG_ERR, "connection from IPv4 mapped address?");
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goto again;
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}
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child_pid = fork();
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if (child_pid == 0) {
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/* child process */
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close(s_wld);
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closelog();
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openlog(logname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
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play_child(s_src, (struct sockaddr *)&srcaddr);
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exit_failure("should never reach here");
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/*NOTREACHED*/
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} else {
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/* parent process */
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close(s_src);
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if (child_pid == -1)
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syslog(LOG_ERR, "can't fork");
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}
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}
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goto again;
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}
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static void
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play_child(int s_src, struct sockaddr *srcaddr)
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{
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struct sockaddr_storage dstaddr6;
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struct sockaddr_storage dstaddr4;
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char src[NI_MAXHOST];
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char dst6[NI_MAXHOST];
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char dst4[NI_MAXHOST];
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socklen_t len = sizeof(dstaddr6);
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int s_dst, error, hport, nresvport, on = 1;
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struct timeval tv;
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struct sockaddr *sa4;
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const struct config *conf;
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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getnameinfo(srcaddr, srcaddr->sa_len,
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src, sizeof(src), NULL, 0, NI_NUMERICHOST);
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syslog(LOG_INFO, "accepted a client from %s", src);
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error = getsockname(s_src, (struct sockaddr *)&dstaddr6, &len);
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if (error == -1) {
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exit_failure("getsockname: %s", strerror(errno));
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/*NOTREACHED*/
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}
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getnameinfo((struct sockaddr *)&dstaddr6, len,
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dst6, sizeof(dst6), NULL, 0, NI_NUMERICHOST);
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syslog(LOG_INFO, "the client is connecting to %s", dst6);
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if (!faith_prefix((struct sockaddr *)&dstaddr6)) {
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if (serverpath) {
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/*
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* Local service
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*/
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syslog(LOG_INFO, "executing local %s", serverpath);
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if (!inetd) {
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dup2(s_src, 0);
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close(s_src);
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dup2(0, 1);
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dup2(0, 2);
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}
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execv(serverpath, serverarg);
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syslog(LOG_ERR, "execv %s: %s", serverpath,
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strerror(errno));
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_exit(EXIT_FAILURE);
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} else {
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close(s_src);
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exit_success("no local service for %s", service);
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}
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}
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/*
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* Act as a translator
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*/
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switch (((struct sockaddr *)&dstaddr6)->sa_family) {
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case AF_INET6:
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if (!map6to4((struct sockaddr_in6 *)&dstaddr6,
|
|
(struct sockaddr_in *)&dstaddr4)) {
|
|
close(s_src);
|
|
exit_failure("map6to4 failed");
|
|
/*NOTREACHED*/
|
|
}
|
|
syslog(LOG_INFO, "translating from v6 to v4");
|
|
break;
|
|
default:
|
|
close(s_src);
|
|
exit_failure("family not supported");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
sa4 = (struct sockaddr *)&dstaddr4;
|
|
getnameinfo(sa4, sa4->sa_len,
|
|
dst4, sizeof(dst4), NULL, 0, NI_NUMERICHOST);
|
|
|
|
conf = config_match(srcaddr, sa4);
|
|
if (!conf || !conf->permit) {
|
|
close(s_src);
|
|
if (conf) {
|
|
exit_failure("translation to %s not permitted for %s",
|
|
dst4, prefix_string(&conf->match));
|
|
/*NOTREACHED*/
|
|
} else {
|
|
exit_failure("translation to %s not permitted", dst4);
|
|
/*NOTREACHED*/
|
|
}
|
|
}
|
|
|
|
syslog(LOG_INFO, "the translator is connecting to %s", dst4);
|
|
|
|
setproctitle("port %s, %s -> %s", service, src, dst4);
|
|
|
|
if (sa4->sa_family == AF_INET6)
|
|
hport = ntohs(((struct sockaddr_in6 *)&dstaddr4)->sin6_port);
|
|
else /* AF_INET */
|
|
hport = ntohs(((struct sockaddr_in *)&dstaddr4)->sin_port);
|
|
|
|
if (pflag)
|
|
s_dst = rresvport_af(&nresvport, sa4->sa_family);
|
|
else
|
|
s_dst = socket(sa4->sa_family, SOCK_STREAM, 0);
|
|
if (s_dst < 0) {
|
|
exit_failure("socket: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
if (conf->src.a.ss_family) {
|
|
if (bind(s_dst, (const struct sockaddr *)&conf->src.a,
|
|
conf->src.a.ss_len) < 0) {
|
|
exit_failure("bind: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
}
|
|
|
|
error = setsockopt(s_dst, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on));
|
|
if (error < 0) {
|
|
exit_failure("setsockopt(SO_OOBINLINE): %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
error = setsockopt(s_src, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
|
|
if (error < 0) {
|
|
exit_failure("setsockopt(SO_SNDTIMEO): %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
error = setsockopt(s_dst, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
|
|
if (error < 0) {
|
|
exit_failure("setsockopt(SO_SNDTIMEO): %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
error = connect(s_dst, sa4, sa4->sa_len);
|
|
if (error < 0) {
|
|
exit_failure("connect: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
switch (hport) {
|
|
case FTP_PORT:
|
|
ftp_relay(s_src, s_dst);
|
|
break;
|
|
default:
|
|
tcp_relay(s_src, s_dst, service);
|
|
break;
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* 0: non faith, 1: faith */
|
|
static int
|
|
faith_prefix(struct sockaddr *dst)
|
|
{
|
|
#ifndef USE_ROUTE
|
|
int mib[4], size;
|
|
struct in6_addr faith_prefix;
|
|
struct sockaddr_in6 *dst6 = (struct sockaddr_in *)dst;
|
|
|
|
if (dst->sa_family != AF_INET6)
|
|
return 0;
|
|
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_INET6;
|
|
mib[2] = IPPROTO_IPV6;
|
|
mib[3] = IPV6CTL_FAITH_PREFIX;
|
|
size = sizeof(struct in6_addr);
|
|
if (sysctl(mib, 4, &faith_prefix, &size, NULL, 0) < 0) {
|
|
exit_failure("sysctl: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
if (memcmp(dst, &faith_prefix,
|
|
sizeof(struct in6_addr) - sizeof(struct in_addr) == 0) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
#else
|
|
struct myaddrs *p;
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_in *sin4;
|
|
struct sockaddr_in6 *dst6;
|
|
struct sockaddr_in *dst4;
|
|
struct sockaddr_in dstmap;
|
|
|
|
dst6 = (struct sockaddr_in6 *)dst;
|
|
if (dst->sa_family == AF_INET6
|
|
&& IN6_IS_ADDR_V4MAPPED(&dst6->sin6_addr)) {
|
|
/* ugly... */
|
|
memset(&dstmap, 0, sizeof(dstmap));
|
|
dstmap.sin_family = AF_INET;
|
|
dstmap.sin_len = sizeof(dstmap);
|
|
memcpy(&dstmap.sin_addr, &dst6->sin6_addr.s6_addr[12],
|
|
sizeof(dstmap.sin_addr));
|
|
dst = (struct sockaddr *)&dstmap;
|
|
}
|
|
|
|
dst6 = (struct sockaddr_in6 *)dst;
|
|
dst4 = (struct sockaddr_in *)dst;
|
|
|
|
for (p = myaddrs; p; p = p->next) {
|
|
sin6 = (struct sockaddr_in6 *)p->addr;
|
|
sin4 = (struct sockaddr_in *)p->addr;
|
|
|
|
if (p->addr->sa_len != dst->sa_len
|
|
|| p->addr->sa_family != dst->sa_family)
|
|
continue;
|
|
|
|
switch (dst->sa_family) {
|
|
case AF_INET6:
|
|
if (sin6->sin6_scope_id == dst6->sin6_scope_id
|
|
&& IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &dst6->sin6_addr))
|
|
return 0;
|
|
break;
|
|
case AF_INET:
|
|
if (sin4->sin_addr.s_addr == dst4->sin_addr.s_addr)
|
|
return 0;
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
/* 0: non faith, 1: faith */
|
|
static int
|
|
map6to4(struct sockaddr_in6 *dst6, struct sockaddr_in *dst4)
|
|
{
|
|
memset(dst4, 0, sizeof(*dst4));
|
|
dst4->sin_len = sizeof(*dst4);
|
|
dst4->sin_family = AF_INET;
|
|
dst4->sin_port = dst6->sin6_port;
|
|
memcpy(&dst4->sin_addr, &dst6->sin6_addr.s6_addr[12],
|
|
sizeof(dst4->sin_addr));
|
|
|
|
if (dst4->sin_addr.s_addr == INADDR_ANY
|
|
|| dst4->sin_addr.s_addr == INADDR_BROADCAST
|
|
|| IN_MULTICAST(ntohl(dst4->sin_addr.s_addr)))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void
|
|
sig_child(int sig __unused)
|
|
{
|
|
int status;
|
|
pid_t pid;
|
|
|
|
while ((pid = wait3(&status, WNOHANG, (struct rusage *)0)) > 0)
|
|
if (WEXITSTATUS(status))
|
|
syslog(LOG_WARNING, "child %ld exit status 0x%x",
|
|
(long)pid, status);
|
|
}
|
|
|
|
void
|
|
sig_terminate(int sig __unused)
|
|
{
|
|
syslog(LOG_INFO, "Terminating faith daemon");
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
static void
|
|
start_daemon(void)
|
|
{
|
|
#ifdef SA_NOCLDWAIT
|
|
struct sigaction sa;
|
|
#endif
|
|
|
|
if (daemon(0, 0) == -1)
|
|
exit_stderr("daemon: %s", strerror(errno));
|
|
|
|
#ifdef SA_NOCLDWAIT
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = sig_child;
|
|
sa.sa_flags = SA_NOCLDWAIT;
|
|
sigemptyset(&sa.sa_mask);
|
|
sigaction(SIGCHLD, &sa, (struct sigaction *)0);
|
|
#else
|
|
if (signal(SIGCHLD, sig_child) == SIG_ERR) {
|
|
exit_failure("signal CHLD: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
#endif
|
|
|
|
if (signal(SIGTERM, sig_terminate) == SIG_ERR) {
|
|
exit_failure("signal TERM: %s", strerror(errno));
|
|
/*NOTREACHED*/
|
|
}
|
|
}
|
|
|
|
static void
|
|
exit_stderr(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char buf[BUFSIZ];
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "%s\n", buf);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
void
|
|
exit_failure(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char buf[BUFSIZ];
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
syslog(LOG_ERR, "%s", buf);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
void
|
|
exit_success(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char buf[BUFSIZ];
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
syslog(LOG_INFO, "%s", buf);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
#ifdef USE_ROUTE
|
|
static void
|
|
grab_myaddrs(void)
|
|
{
|
|
struct ifaddrs *ifap, *ifa;
|
|
struct myaddrs *p;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (getifaddrs(&ifap) != 0) {
|
|
exit_failure("getifaddrs");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
p = (struct myaddrs *)malloc(sizeof(struct myaddrs) +
|
|
ifa->ifa_addr->sa_len);
|
|
if (!p) {
|
|
exit_failure("not enough core");
|
|
/*NOTREACHED*/
|
|
}
|
|
memcpy(p + 1, ifa->ifa_addr, ifa->ifa_addr->sa_len);
|
|
p->next = myaddrs;
|
|
p->addr = (struct sockaddr *)(p + 1);
|
|
#ifdef __KAME__
|
|
if (ifa->ifa_addr->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)p->addr;
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)
|
|
|| IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
|
|
sin6->sin6_scope_id =
|
|
ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
|
|
sin6->sin6_addr.s6_addr[2] = 0;
|
|
sin6->sin6_addr.s6_addr[3] = 0;
|
|
}
|
|
}
|
|
#endif
|
|
myaddrs = p;
|
|
if (dflag) {
|
|
char hbuf[NI_MAXHOST];
|
|
getnameinfo(p->addr, p->addr->sa_len,
|
|
hbuf, sizeof(hbuf), NULL, 0,
|
|
NI_NUMERICHOST);
|
|
syslog(LOG_INFO, "my interface: %s %s", hbuf,
|
|
ifa->ifa_name);
|
|
}
|
|
}
|
|
|
|
freeifaddrs(ifap);
|
|
}
|
|
|
|
static void
|
|
free_myaddrs(void)
|
|
{
|
|
struct myaddrs *p, *q;
|
|
|
|
p = myaddrs;
|
|
while (p) {
|
|
q = p->next;
|
|
free(p);
|
|
p = q;
|
|
}
|
|
myaddrs = NULL;
|
|
}
|
|
|
|
static void
|
|
update_myaddrs(void)
|
|
{
|
|
char msg[BUFSIZ];
|
|
int len;
|
|
struct rt_msghdr *rtm;
|
|
|
|
len = read(sockfd, msg, sizeof(msg));
|
|
if (len < 0) {
|
|
syslog(LOG_ERR, "read(PF_ROUTE) failed");
|
|
return;
|
|
}
|
|
rtm = (struct rt_msghdr *)msg;
|
|
if (len < 4 || len < rtm->rtm_msglen) {
|
|
syslog(LOG_ERR, "read(PF_ROUTE) short read");
|
|
return;
|
|
}
|
|
if (rtm->rtm_version != RTM_VERSION) {
|
|
syslog(LOG_ERR, "routing socket version mismatch");
|
|
close(sockfd);
|
|
sockfd = 0;
|
|
return;
|
|
}
|
|
switch (rtm->rtm_type) {
|
|
case RTM_NEWADDR:
|
|
case RTM_DELADDR:
|
|
case RTM_IFINFO:
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
/* XXX more filters here? */
|
|
|
|
syslog(LOG_INFO, "update interface address list");
|
|
free_myaddrs();
|
|
grab_myaddrs();
|
|
}
|
|
#endif /*USE_ROUTE*/
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: %s [-dp] [-f conf] service [serverpath [serverargs]]\n",
|
|
faithdname);
|
|
exit(0);
|
|
}
|