NetBSD/usr.sbin/ldpd/main.c

162 lines
4.2 KiB
C

/* $NetBSD: main.c,v 1.9 2013/07/31 06:58:23 kefren Exp $ */
/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mihai Chelaru <kefren@NetBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <netinet/in.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include "ldp.h"
#include "ldp_command.h"
#include "socketops.h"
#include "tlv.h"
#include "pdu.h"
#include "fsm.h"
#include "ldp_errors.h"
#include "mpls_interface.h"
#include "conffile.h"
extern int ls; /* TCP listening socket */
extern int dont_catch;
extern int command_port;
extern int command_socket;
extern int debug_f, warn_f, syslog_f;
extern struct sockaddr mplssockaddr;
extern struct in_addr conf_ldp_id;
void print_usage(char *myself)
{
printf("\nUsage: %s [-DdfhW] [-c config_file] [-p port]\n\n", myself);
}
int
main(int argc, char *argv[])
{
int ch, forkres, dontfork = 0, cpf;
char conffile[PATH_MAX + 1];
strlcpy(conffile, CONFFILE, sizeof(conffile));
while((ch = getopt(argc, argv, "c:dDfhp:W")) != -1)
switch(ch) {
case 'c':
strlcpy(conffile, optarg, sizeof(conffile));
break;
case 'D':
debug_f = 1;
break;
case 'd':
dont_catch = 1;
break;
case 'f':
dontfork = 1;
break;
case 'p':
if ((command_port = atoi(optarg)) < 1) {
print_usage(argv[0]);
return EXIT_FAILURE;
}
break;
case 'W':
warn_f = 1;
break;
case 'h':
default:
print_usage(argv[0]);
return EXIT_FAILURE;
break;
}
cpf = conf_parsefile(conffile);
if (cpf < 0 && strcmp(conffile, CONFFILE)) {
fatalp("Cannot parse config file: %s\n", conffile);
return EXIT_FAILURE;
} else if (cpf > 0) {
fatalp("Cannot parse line %d in config file\n", cpf);
return EXIT_FAILURE;
}
if (set_my_ldp_id()) {
fatalp("Cannot set LDP ID\n");
return EXIT_FAILURE;
}
if (conf_ldp_id.s_addr != 0)
strlcpy(my_ldp_id, inet_ntoa(conf_ldp_id), INET_ADDRSTRLEN);
if (mplssockaddr.sa_len == 0) {
fatalp("FATAL: Create an mpls interface using ifconfig\n"
"e.g. ifconfig mpls0 create up\n");
return EXIT_FAILURE;
}
if (mpls_start_ldp() == -1)
return EXIT_FAILURE;
if (!strcmp(LDP_ID, "0.0.0.0")) {
fatalp("Cannot set my LDP ID.\nAre you sure you've "
"got a non-loopback INET interface UP ?\n");
return EXIT_FAILURE;
}
init_command_sockets();
if ((command_socket = create_command_socket(command_port)) < 1) {
fatalp("Cannot create command socket\n");
return EXIT_FAILURE;
}
if (create_hello_sockets() != 0) {
fatalp("Cannot create hello socket\n");
return EXIT_FAILURE;
}
ls = create_listening_socket();
if (ls < 0) {
fatalp("Cannot create listening socket\n");
return EXIT_FAILURE;
}
if (dontfork == 1)
return the_big_loop();
forkres = fork();
if (forkres == 0) {
syslog_f = 1;
return the_big_loop();
}
if (forkres < 0)
perror("fork");
return EXIT_SUCCESS;
}