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 #include "privs.h"
  40 #include "debug.h"
  41
  42 #include "ospfd/ospfd.h"
  43 #include "ospfd/ospf_interface.h"
  44 #include "ospfd/ospf_asbr.h"
  45 #include "ospfd/ospf_lsa.h"
  46 #include "ospfd/ospf_lsdb.h"
  47 #include "ospfd/ospf_neighbor.h"
  48 #include "ospfd/ospf_dump.h"
  49 #include "ospfd/ospf_zebra.h"
  50 #include "ospfd/ospf_vty.h"
  51
  52 /* ospfd privileges */
  53 zebra_capabilities_t _caps_p [] =
  54 {
  55   ZCAP_RAW,
  56   ZCAP_BIND,
  57   ZCAP_BROADCAST,
  58   ZCAP_ADMIN,
  59 };
  60
  61 struct zebra_privs_t ospfd_privs =
  62 {
  63 #if defined(ZEBRA_USER) && defined(ZEBRA_GROUP)
  64   .user = ZEBRA_USER,
  65   .group = ZEBRA_GROUP,
  66 #endif
  67 #if defined(VTY_GROUP)
  68   .vty_group = VTY_GROUP,
  69 #endif
  70   .caps_p = _caps_p,
  71   .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
  72   .cap_num_i = 0
  73 };
  74
  75 /* Configuration filename and directory. */
  76 char config_current[] = OSPF_DEFAULT_CONFIG;
  77 char config_default[] = SYSCONFDIR OSPF_DEFAULT_CONFIG;
  78
  79 /* OSPFd options. */
  80 struct option longopts[] =
  81 {
  82   { "daemon",      no_argument,       NULL, 'd'},
  83   { "config_file", required_argument, NULL, 'f'},
  84   { "pid_file",    required_argument, NULL, 'i'},
  85   { "log_mode",    no_argument,       NULL, 'l'},
  86   { "help",        no_argument,       NULL, 'h'},
  87   { "vty_addr",    required_argument, NULL, 'A'},
  88   { "vty_port",    required_argument, NULL, 'P'},
  89   { "user",        required_argument, NULL, 'u'},
  90   { "version",     no_argument,       NULL, 'v'},
  91   { 0 }
  92 };
  93
  94 /* OSPFd program name */
  95
  96 /* Master of threads. */
  97 struct thread_master *master;
  98
  99 /* Process ID saved for use by init system */
 100 char *pid_file = PATH_OSPFD_PID;
 101
 102 /* Help information display. */
 103 static void
 104 usage (char *progname, int status)
 105 {
 106   if (status != 0)
 107     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 108   else
 109     {
 110       printf ("Usage : %s [OPTION...]\n\
 111 Daemon which manages OSPF.\n\n\
 112 -d, --daemon       Runs in daemon mode\n\
 113 -f, --config_file  Set configuration file name\n\
 114 -i, --pid_file     Set process identifier file name\n\
 115 -A, --vty_addr     Set vty's bind address\n\
 116 -P, --vty_port     Set vty's port number\n\
 117 -u, --user         User and group to run as\n\
 118 -v, --version      Print program version\n\
 119 -h, --help         Display this help and exit\n\
 120 \n\
 121 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 122     }
 123   exit (status);
 124 }
 125 \f
 126 /* SIGHUP handler. */
 127 void
 128 sighup (int sig)
 129 {
 130   zlog (NULL, LOG_INFO, "SIGHUP received");
 131 }
 132
 133 /* SIGINT handler. */
 134 void
 135 sigint (int sig)
 136 {
 137   zlog (NULL, LOG_INFO, "Terminating on signal");
 138
 139   ospf_terminate ();
 140
 141   exit (0);
 142 }
 143
 144 /* SIGUSR1 handler. */
 145 void
 146 sigusr1 (int sig)
 147 {
 148   zlog_rotate (NULL);
 149 }
 150
 151 /* Signal wrapper. */
 152 RETSIGTYPE *
 153 signal_set (int signo, void (*func)(int))
 154 {
 155   int ret;
 156   struct sigaction sig;
 157   struct sigaction osig;
 158
 159   sig.sa_handler = func;
 160   sigemptyset (&sig.sa_mask);
 161   sig.sa_flags = 0;
 162 #ifdef SA_RESTART
 163   sig.sa_flags |= SA_RESTART;
 164 #endif /* SA_RESTART */
 165
 166   ret = sigaction (signo, &sig, &osig);
 167
 168   if (ret < 0)
 169     return (SIG_ERR);
 170   else
 171     return (osig.sa_handler);
 172 }
 173
 174 /* Initialization of signal handles. */
 175 void
 176 signal_init ()
 177 {
 178   signal_set (SIGHUP, sighup);
 179   signal_set (SIGINT, sigint);
 180   signal_set (SIGTERM, sigint);
 181   signal_set (SIGPIPE, SIG_IGN);
 182 #ifdef SIGTSTP
 183   signal_set (SIGTSTP, SIG_IGN);
 184 #endif
 185 #ifdef SIGTTIN
 186   signal_set (SIGTTIN, SIG_IGN);
 187 #endif
 188 #ifdef SIGTTOU
 189   signal_set (SIGTTOU, SIG_IGN);
 190 #endif
 191   signal_set (SIGUSR1, sigusr1);
 192 #ifdef HAVE_GLIBC_BACKTRACE
 193   signal_set (SIGBUS, debug_print_trace);
 194   signal_set (SIGSEGV, debug_print_trace);
 195   signal_set (SIGILL, debug_print_trace);
 196 #endif /* HAVE_GLIBC_BACKTRACE */
 197 }
 198 \f
 199 /* OSPFd main routine. */
 200 int
 201 main (int argc, char **argv)
 202 {
 203   char *p;
 204   char *vty_addr = NULL;
 205   int vty_port = OSPF_VTY_PORT;
 206   int daemon_mode = 0;
 207   char *config_file = NULL;
 208   char *progname;
 209   struct thread thread;
 210
 211   /* Set umask before anything for security */
 212   umask (0027);
 213
 214   /* get program name */
 215   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 216
 217   /* Invoked by a priviledged user? -- endo. */
 218   if (geteuid () != 0)
 219     {
 220       errno = EPERM;
 221       perror (progname);
 222       exit (1);
 223     }
 224
 225   zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_OSPF,
 226                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 227
 228   /* OSPF master init. */
 229   ospf_master_init ();
 230
 231   while (1)
 232     {
 233       int opt;
 234
 235       opt = getopt_long (argc, argv, "dlf:hA:P:u:v", longopts, 0);
 236
 237       if (opt == EOF)
 238         break;
 239
 240       switch (opt)
 241         {
 242         case 0:
 243           break;
 244         case 'd':
 245           daemon_mode = 1;
 246           break;
 247         case 'f':
 248           config_file = optarg;
 249           break;
 250         case 'A':
 251           vty_addr = optarg;
 252           break;
 253         case 'i':
 254           pid_file = optarg;
 255           break;
 256         case 'P':
 257           /* Deal with atoi() returning 0 on failure, and ospfd not
 258              listening on ospfd port... */
 259           if (strcmp(optarg, "0") == 0)
 260             {
 261               vty_port = 0;
 262               break;
 263             }
 264           vty_port = atoi (optarg);
 265           vty_port = (vty_port ? vty_port : OSPF_VTY_PORT);
 266           break;
 267   case 'u':
 268     ospfd_privs.group = ospfd_privs.user = optarg;
 269     break;
 270         case 'v':
 271           print_version (progname);
 272           exit (0);
 273           break;
 274         case 'h':
 275           usage (progname, 0);
 276           break;
 277         default:
 278           usage (progname, 1);
 279           break;
 280         }
 281     }
 282
 283   /* Initializations. */
 284   master = om->master;
 285
 286   /* Library inits. */
 287   zprivs_init (&ospfd_privs);
 288   signal_init ();
 289   cmd_init (1);
 290   debug_init ();
 291   vty_init (master);
 292   memory_init ();
 293
 294   access_list_init ();
 295   prefix_list_init ();
 296
 297   /* OSPFd inits. */
 298   ospf_init ();
 299   ospf_if_init ();
 300   ospf_zebra_init ();
 301
 302   /* OSPF vty inits. */
 303   ospf_vty_init ();
 304   ospf_vty_show_init ();
 305
 306   ospf_route_map_init ();
 307 #ifdef HAVE_SNMP
 308   ospf_snmp_init ();
 309 #endif /* HAVE_SNMP */
 310 #ifdef HAVE_OPAQUE_LSA
 311   ospf_opaque_init ();
 312 #endif /* HAVE_OPAQUE_LSA */
 313
 314   sort_node ();
 315
 316   /* Get configuration file. */
 317   vty_read_config (config_file, config_current, config_default);
 318
 319   /* Change to the daemon program. */
 320   if (daemon_mode)
 321     daemon (0, 0);
 322
 323   /* Process id file create. */
 324   pid_output (pid_file);
 325
 326   /* Create VTY socket */
 327   vty_serv_sock (vty_addr, vty_port, OSPF_VTYSH_PATH);
 328
 329 #ifdef DEBUG
 330   /* Print banner. */
 331   zlog (NULL, LOG_INFO, "OSPFd (%s) starts", ZEBRA_VERSION);
 332 #endif
 333
 334   /* Fetch next active thread. */
 335   while (thread_fetch (master, &thread))
 336     thread_call (&thread);
 337
 338   /* Not reached. */
 339   exit (0);
 340 }
 341