1 /* $NetBSD: main.c,v 1.9 2013/07/31 06:58:23 kefren Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mihai Chelaru <kefren@NetBSD.org> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <netinet/in.h> 33 #include <sys/stat.h> 34 #include <sys/socket.h> 35 #include <arpa/inet.h> 36 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <strings.h> 40 #include <unistd.h> 41 42 #include "ldp.h" 43 #include "ldp_command.h" 44 #include "socketops.h" 45 #include "tlv.h" 46 #include "pdu.h" 47 #include "fsm.h" 48 #include "ldp_errors.h" 49 #include "mpls_interface.h" 50 #include "conffile.h" 51 52 extern int ls; /* TCP listening socket */ 53 extern int dont_catch; 54 extern int command_port; 55 extern int command_socket; 56 57 extern int debug_f, warn_f, syslog_f; 58 59 extern struct sockaddr mplssockaddr; 60 extern struct in_addr conf_ldp_id; 61 62 void print_usage(char *myself) 63 { 64 printf("\nUsage: %s [-DdfhW] [-c config_file] [-p port]\n\n", myself); 65 } 66 67 int 68 main(int argc, char *argv[]) 69 { 70 int ch, forkres, dontfork = 0, cpf; 71 char conffile[PATH_MAX + 1]; 72 73 strlcpy(conffile, CONFFILE, sizeof(conffile)); 74 while((ch = getopt(argc, argv, "c:dDfhp:W")) != -1) 75 switch(ch) { 76 case 'c': 77 strlcpy(conffile, optarg, sizeof(conffile)); 78 break; 79 case 'D': 80 debug_f = 1; 81 break; 82 case 'd': 83 dont_catch = 1; 84 break; 85 case 'f': 86 dontfork = 1; 87 break; 88 case 'p': 89 if ((command_port = atoi(optarg)) < 1) { 90 print_usage(argv[0]); 91 return EXIT_FAILURE; 92 } 93 break; 94 case 'W': 95 warn_f = 1; 96 break; 97 case 'h': 98 default: 99 print_usage(argv[0]); 100 return EXIT_FAILURE; 101 break; 102 } 103 104 cpf = conf_parsefile(conffile); 105 if (cpf < 0 && strcmp(conffile, CONFFILE)) { 106 fatalp("Cannot parse config file: %s\n", conffile); 107 return EXIT_FAILURE; 108 } else if (cpf > 0) { 109 fatalp("Cannot parse line %d in config file\n", cpf); 110 return EXIT_FAILURE; 111 } 112 113 if (set_my_ldp_id()) { 114 fatalp("Cannot set LDP ID\n"); 115 return EXIT_FAILURE; 116 } 117 if (conf_ldp_id.s_addr != 0) 118 strlcpy(my_ldp_id, inet_ntoa(conf_ldp_id), INET_ADDRSTRLEN); 119 120 if (mplssockaddr.sa_len == 0) { 121 fatalp("FATAL: Create an mpls interface using ifconfig\n" 122 "e.g. ifconfig mpls0 create up\n"); 123 return EXIT_FAILURE; 124 } 125 if (mpls_start_ldp() == -1) 126 return EXIT_FAILURE; 127 if (!strcmp(LDP_ID, "0.0.0.0")) { 128 fatalp("Cannot set my LDP ID.\nAre you sure you've " 129 "got a non-loopback INET interface UP ?\n"); 130 return EXIT_FAILURE; 131 } 132 init_command_sockets(); 133 if ((command_socket = create_command_socket(command_port)) < 1) { 134 fatalp("Cannot create command socket\n"); 135 return EXIT_FAILURE; 136 } 137 if (create_hello_sockets() != 0) { 138 fatalp("Cannot create hello socket\n"); 139 return EXIT_FAILURE; 140 } 141 142 ls = create_listening_socket(); 143 144 if (ls < 0) { 145 fatalp("Cannot create listening socket\n"); 146 return EXIT_FAILURE; 147 } 148 149 if (dontfork == 1) 150 return the_big_loop(); 151 152 forkres = fork(); 153 if (forkres == 0) { 154 syslog_f = 1; 155 return the_big_loop(); 156 } 157 if (forkres < 0) 158 perror("fork"); 159 160 return EXIT_SUCCESS; 161 } 162