1 /* $NetBSD: main.c,v 1.7 2012/11/12 18:39:00 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 <sys/select.h> 36 #include <arpa/inet.h> 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <strings.h> 41 #include <unistd.h> 42 43 #include "ldp.h" 44 #include "ldp_command.h" 45 #include "socketops.h" 46 #include "tlv.h" 47 #include "pdu.h" 48 #include "fsm.h" 49 #include "ldp_errors.h" 50 #include "mpls_interface.h" 51 #include "conffile.h" 52 53 extern int ls; /* TCP listening socket */ 54 extern int dont_catch; 55 extern int command_port; 56 extern int command_socket; 57 58 extern int debug_f, warn_f, syslog_f; 59 60 extern struct sockaddr mplssockaddr; 61 extern struct in_addr conf_ldp_id; 62 63 void print_usage(char *myself) 64 { 65 printf("\nUsage: %s [-DdfhW] [-c config_file] [-p port]\n\n", myself); 66 } 67 68 int 69 main(int argc, char *argv[]) 70 { 71 int ch, forkres, dontfork = 0, cpf; 72 char conffile[PATH_MAX + 1]; 73 74 strlcpy(conffile, CONFFILE, sizeof(conffile)); 75 while((ch = getopt(argc, argv, "c:dDfhp:W")) != -1) 76 switch(ch) { 77 case 'c': 78 strlcpy(conffile, optarg, sizeof(conffile)); 79 break; 80 case 'D': 81 debug_f = 1; 82 break; 83 case 'd': 84 dont_catch = 1; 85 break; 86 case 'f': 87 dontfork = 1; 88 break; 89 case 'p': 90 if ((command_port = atoi(optarg)) < 1) { 91 print_usage(argv[0]); 92 return EXIT_FAILURE; 93 } 94 break; 95 case 'W': 96 warn_f = 1; 97 break; 98 case 'h': 99 default: 100 print_usage(argv[0]); 101 return EXIT_FAILURE; 102 break; 103 } 104 if (geteuid()) { 105 fatalp("You have to run this as ROOT\n"); 106 return EXIT_FAILURE; 107 } 108 109 cpf = conf_parsefile(conffile); 110 if (cpf < 0 && strcmp(conffile, CONFFILE)) { 111 fatalp("Cannot parse config file: %s\n", conffile); 112 return EXIT_FAILURE; 113 } else if (cpf > 0) { 114 fatalp("Cannot parse line %d in config file\n", cpf); 115 return EXIT_FAILURE; 116 } 117 118 if (set_my_ldp_id()) { 119 fatalp("Cannot set LDP ID\n"); 120 return EXIT_FAILURE; 121 } 122 if (conf_ldp_id.s_addr != 0) 123 strlcpy(my_ldp_id, inet_ntoa(conf_ldp_id), INET_ADDRSTRLEN); 124 125 if (mplssockaddr.sa_len == 0) { 126 fatalp("You need one mpls interface up and an IP " 127 "address set for it\n"); 128 return EXIT_FAILURE; 129 } 130 if (mpls_start_ldp() == -1) 131 return EXIT_FAILURE; 132 if (!strcmp(LDP_ID, "0.0.0.0")) { 133 fatalp("Cannot set my LDP ID.\nAre you sure you've " 134 "got a non-loopback INET interface UP ?\n"); 135 return EXIT_FAILURE; 136 } 137 init_command_sockets(); 138 if ((command_socket = create_command_socket(command_port)) < 1) { 139 fatalp("Cannot create command socket\n"); 140 return EXIT_FAILURE; 141 } 142 if (create_hello_sockets() != 0) { 143 fatalp("Cannot create hello socket\n"); 144 return EXIT_FAILURE; 145 } 146 147 ls = create_listening_socket(); 148 149 if (ls < 0) { 150 fatalp("Cannot create listening socket\n"); 151 return EXIT_FAILURE; 152 } 153 154 if (dontfork == 1) 155 return the_big_loop(); 156 157 forkres = fork(); 158 if (forkres == 0) { 159 syslog_f = 1; 160 return the_big_loop(); 161 } 162 if (forkres < 0) 163 perror("fork"); 164 165 return EXIT_SUCCESS; 166 } 167