release/src/router/zebra/ospfd/ospf_main.c

   1 /*
   2  * OSPFd main routine.
   3  *   Copyright (C) 1998, 99 Kunihiro Ishiguro, Toshiaki Takada
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20  * 02111-1307, USA.
  21  */
  22
  23 #include <zebra.h>
  24
  25 #include "version.h"
  26 #include "getopt.h"
  27 #include "thread.h"
  28 #include "prefix.h"
  29 #include "linklist.h"
  30 #include "if.h"
  31 #include "vector.h"
  32 #include "vty.h"
  33 #include "command.h"
  34 #include "filter.h"
  35 #include "plist.h"
  36 #include "stream.h"
  37 #include "log.h"
  38 #include "memory.h"
  39
  40 #include "ospfd/ospfd.h"
  41 #include "ospfd/ospf_interface.h"
  42 #include "ospfd/ospf_asbr.h"
  43 #include "ospfd/ospf_lsa.h"
  44 #include "ospfd/ospf_lsdb.h"
  45 #include "ospfd/ospf_neighbor.h"
  46 #include "ospfd/ospf_dump.h"
  47 #include "ospfd/ospf_zebra.h"
  48 #include "ospfd/ospf_vty.h"
  49
  50 /* Configuration filename and directory. */
  51 char config_current[] = OSPF_DEFAULT_CONFIG;
  52 char config_default[] = SYSCONFDIR OSPF_DEFAULT_CONFIG;
  53
  54 /* OSPFd options. */
  55 struct option longopts[] =
  56 {
  57   { "daemon",      no_argument,       NULL, 'd'},
  58   { "config_file", required_argument, NULL, 'f'},
  59   { "pid_file",    required_argument, NULL, 'i'},
  60   { "log_mode",    no_argument,       NULL, 'l'},
  61   { "help",        no_argument,       NULL, 'h'},
  62   { "vty_addr",    required_argument, NULL, 'A'},
  63   { "vty_port",    required_argument, NULL, 'P'},
  64   { "version",     no_argument,       NULL, 'v'},
  65   { 0 }
  66 };
  67
  68 /* OSPFd program name */
  69
  70 /* Master of threads. */
  71 struct thread_master *master;
  72
  73 /* Process ID saved for use by init system */
  74 char *pid_file = PATH_OSPFD_PID;
  75
  76 /* Help information display. */
  77 static void
  78 usage (char *progname, int status)
  79 {
  80   if (status != 0)
  81     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
  82   else
  83     {
  84       printf ("Usage : %s [OPTION...]\n\
  85 Daemon which manages OSPF.\n\n\
  86 -d, --daemon       Runs in daemon mode\n\
  87 -f, --config_file  Set configuration file name\n\
  88 -i, --pid_file     Set process identifier file name\n\
  89 -A, --vty_addr     Set vty's bind address\n\
  90 -P, --vty_port     Set vty's port number\n\
  91 -v, --version      Print program version\n\
  92 -h, --help         Display this help and exit\n\
  93 \n\
  94 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
  95     }
  96   exit (status);
  97 }
  98 \f
  99 /* SIGHUP handler. */
 100 void
 101 sighup (int sig)
 102 {
 103   zlog (NULL, LOG_INFO, "SIGHUP received");
 104 }
 105
 106 /* SIGINT handler. */
 107 void
 108 sigint (int sig)
 109 {
 110   zlog (NULL, LOG_INFO, "Terminating on signal");
 111
 112   ospf_terminate ();
 113
 114   exit (0);
 115 }
 116
 117 /* SIGUSR1 handler. */
 118 void
 119 sigusr1 (int sig)
 120 {
 121   zlog_rotate (NULL);
 122 }
 123
 124 /* Signal wrapper. */
 125 RETSIGTYPE *
 126 signal_set (int signo, void (*func)(int))
 127 {
 128   int ret;
 129   struct sigaction sig;
 130   struct sigaction osig;
 131
 132   sig.sa_handler = func;
 133   sigemptyset (&sig.sa_mask);
 134   sig.sa_flags = 0;
 135 #ifdef SA_RESTART
 136   sig.sa_flags |= SA_RESTART;
 137 #endif /* SA_RESTART */
 138
 139   ret = sigaction (signo, &sig, &osig);
 140
 141   if (ret < 0)
 142     return (SIG_ERR);
 143   else
 144     return (osig.sa_handler);
 145 }
 146
 147 /* Initialization of signal handles. */
 148 void
 149 signal_init ()
 150 {
 151   signal_set (SIGHUP, sighup);
 152   signal_set (SIGINT, sigint);
 153   signal_set (SIGTERM, sigint);
 154   signal_set (SIGPIPE, SIG_IGN);
 155 #ifdef SIGTSTP
 156   signal_set (SIGTSTP, SIG_IGN);
 157 #endif
 158 #ifdef SIGTTIN
 159   signal_set (SIGTTIN, SIG_IGN);
 160 #endif
 161 #ifdef SIGTTOU
 162   signal_set (SIGTTOU, SIG_IGN);
 163 #endif
 164   signal_set (SIGUSR1, sigusr1);
 165 }
 166 \f
 167 /* OSPFd main routine. */
 168 int
 169 main (int argc, char **argv)
 170 {
 171   char *p;
 172   char *vty_addr = NULL;
 173   int vty_port = 0;
 174   int daemon_mode = 0;
 175   char *config_file = NULL;
 176   char *progname;
 177   struct thread thread;
 178
 179   /* Set umask before anything for security */
 180   umask (0027);
 181
 182   /* get program name */
 183   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 184
 185   /* Invoked by a priviledged user? -- endo. */
 186   if (getuid () != 0)
 187     {
 188       errno = EPERM;
 189       perror (progname);
 190       exit (1);
 191     }
 192
 193   zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_OSPF,
 194                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 195
 196   /* OSPF master init. */
 197   ospf_master_init ();
 198
 199   while (1)
 200     {
 201       int opt;
 202
 203       opt = getopt_long (argc, argv, "dlf:hA:P:v", longopts, 0);
 204
 205       if (opt == EOF)
 206         break;
 207
 208       switch (opt)
 209         {
 210         case 0:
 211           break;
 212         case 'd':
 213           daemon_mode = 1;
 214           break;
 215         case 'f':
 216           config_file = optarg;
 217           break;
 218         case 'A':
 219           vty_addr = optarg;
 220           break;
 221         case 'i':
 222           pid_file = optarg;
 223           break;
 224         case 'P':
 225           vty_port = atoi (optarg);
 226           break;
 227         case 'v':
 228           print_version (progname);
 229           exit (0);
 230           break;
 231         case 'h':
 232           usage (progname, 0);
 233           break;
 234         default:
 235           usage (progname, 1);
 236           break;
 237         }
 238     }
 239
 240   /* Initializations. */
 241   master = om->master;
 242
 243   /* Library inits. */
 244   signal_init ();
 245   cmd_init (1);
 246   debug_init ();
 247   vty_init ();
 248   memory_init ();
 249
 250   access_list_init ();
 251   prefix_list_init ();
 252
 253   /* OSPFd inits. */
 254   ospf_init ();
 255   ospf_if_init ();
 256   ospf_zebra_init ();
 257
 258   /* OSPF vty inits. */
 259   ospf_vty_init ();
 260   ospf_vty_show_init ();
 261
 262   ospf_route_map_init ();
 263 #ifdef HAVE_SNMP
 264   ospf_snmp_init ();
 265 #endif /* HAVE_SNMP */
 266 #ifdef HAVE_OPAQUE_LSA
 267   ospf_opaque_init ();
 268 #endif /* HAVE_OPAQUE_LSA */
 269
 270   sort_node ();
 271
 272   /* Get configuration file. */
 273   vty_read_config (config_file, config_current, config_default);
 274
 275   /* Change to the daemon program. */
 276   if (daemon_mode)
 277     daemon (0, 0);
 278
 279   /* Process id file create. */
 280   pid_output (pid_file);
 281
 282   /* Create VTY socket */
 283   vty_serv_sock (vty_addr,
 284                  vty_port ? vty_port : OSPF_VTY_PORT, OSPF_VTYSH_PATH);
 285
 286   /* Print banner. */
 287   zlog (NULL, LOG_INFO, "OSPFd (%s) starts", ZEBRA_VERSION);
 288
 289   /* Fetch next active thread. */
 290   while (thread_fetch (master, &thread))
 291     thread_call (&thread);
 292
 293   /* Not reached. */
 294   exit (0);
 295 }
 296