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 <lib/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 "sigevent.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_NET_RAW,
  56   ZCAP_BIND,
  57   ZCAP_NET_ADMIN,
  58 };
  59
  60 struct zebra_privs_t ospfd_privs =
  61 {
  62 #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP)
  63   .user = QUAGGA_USER,
  64   .group = QUAGGA_GROUP,
  65 #endif
  66 #if defined(VTY_GROUP)
  67   .vty_group = VTY_GROUP,
  68 #endif
  69   .caps_p = _caps_p,
  70   .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
  71   .cap_num_i = 0
  72 };
  73
  74 /* Configuration filename and directory. */
  75 char config_default[] = SYSCONFDIR OSPF_DEFAULT_CONFIG;
  76
  77 /* OSPFd options. */
  78 struct option longopts[] =
  79 {
  80   { "daemon",      no_argument,       NULL, 'd'},
  81   { "config_file", required_argument, NULL, 'f'},
  82   { "pid_file",    required_argument, NULL, 'i'},
  83   { "dryrun",      no_argument,       NULL, 'C'},
  84   { "help",        no_argument,       NULL, 'h'},
  85   { "vty_addr",    required_argument, NULL, 'A'},
  86   { "vty_port",    required_argument, NULL, 'P'},
  87   { "user",        required_argument, NULL, 'u'},
  88   { "group",       required_argument, NULL, 'g'},
  89   { "apiserver",   no_argument,       NULL, 'a'},
  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 const char *pid_file = PATH_OSPFD_PID;
 101
 102 #ifdef SUPPORT_OSPF_API
 103 extern int ospf_apiserver_enable;
 104 #endif /* SUPPORT_OSPF_API */
 105
 106 /* Help information display. */
 107 static void __attribute__ ((noreturn))
 108 usage (char *progname, int status)
 109 {
 110   if (status != 0)
 111     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 112   else
 113     {
 114       printf ("Usage : %s [OPTION...]\n\
 115 Daemon which manages OSPF.\n\n\
 116 -d, --daemon       Runs in daemon mode\n\
 117 -f, --config_file  Set configuration file name\n\
 118 -i, --pid_file     Set process identifier file name\n\
 119 -A, --vty_addr     Set vty's bind address\n\
 120 -P, --vty_port     Set vty's port number\n\
 121 -u, --user         User to run as\n\
 122 -g, --group        Group to run as\n\
 123 -a. --apiserver    Enable OSPF apiserver\n\
 124 -v, --version      Print program version\n\
 125 -C, --dryrun       Check configuration for validity and exit\n\
 126 -h, --help         Display this help and exit\n\
 127 \n\
 128 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 129     }
 130   exit (status);
 131 }
 132 \f
 133 /* SIGHUP handler. */
 134 static void
 135 sighup (void)
 136 {
 137   zlog (NULL, LOG_INFO, "SIGHUP received");
 138 }
 139
 140 /* SIGINT / SIGTERM handler. */
 141 static void
 142 sigint (void)
 143 {
 144   zlog_notice ("Terminating on signal");
 145   ospf_terminate ();
 146 }
 147
 148 /* SIGUSR1 handler. */
 149 static void
 150 sigusr1 (void)
 151 {
 152   zlog_rotate (NULL);
 153 }
 154
 155 struct quagga_signal_t ospf_signals[] =
 156 {
 157   {
 158     .signal = SIGHUP,
 159     .handler = &sighup,
 160   },
 161   {
 162     .signal = SIGUSR1,
 163     .handler = &sigusr1,
 164   },
 165   {
 166     .signal = SIGINT,
 167     .handler = &sigint,
 168   },
 169   {
 170     .signal = SIGTERM,
 171     .handler = &sigint,
 172   },
 173 };
 174 \f
 175 /* OSPFd main routine. */
 176 int
 177 main (int argc, char **argv)
 178 {
 179   char *p;
 180   char *vty_addr = NULL;
 181   int vty_port = OSPF_VTY_PORT;
 182   int daemon_mode = 0;
 183   char *config_file = NULL;
 184   char *progname;
 185   struct thread thread;
 186   int dryrun = 0;
 187
 188   /* Set umask before anything for security */
 189   umask (0027);
 190
 191   /* get program name */
 192   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 193
 194   /* Invoked by a priviledged user? -- endo. */
 195   if (geteuid () != 0)
 196     {
 197       errno = EPERM;
 198       perror (progname);
 199       exit (1);
 200     }
 201
 202   zlog_default = openzlog (progname, ZLOG_OSPF,
 203                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 204
 205   /* OSPF master init. */
 206   ospf_master_init ();
 207
 208 #ifdef SUPPORT_OSPF_API
 209   /* OSPF apiserver is disabled by default. */
 210   ospf_apiserver_enable = 0;
 211 #endif /* SUPPORT_OSPF_API */
 212
 213   while (1)
 214     {
 215       int opt;
 216
 217       opt = getopt_long (argc, argv, "df:i:hA:P:u:g:avC", longopts, 0);
 218
 219       if (opt == EOF)
 220         break;
 221
 222       switch (opt)
 223         {
 224         case 0:
 225           break;
 226         case 'd':
 227           daemon_mode = 1;
 228           break;
 229         case 'f':
 230           config_file = optarg;
 231           break;
 232         case 'A':
 233           vty_addr = optarg;
 234           break;
 235         case 'i':
 236           pid_file = optarg;
 237           break;
 238         case 'P':
 239           /* Deal with atoi() returning 0 on failure, and ospfd not
 240              listening on ospfd port... */
 241           if (strcmp(optarg, "0") == 0)
 242             {
 243               vty_port = 0;
 244               break;
 245             }
 246           vty_port = atoi (optarg);
 247           if (vty_port <= 0 || vty_port > 0xffff)
 248             vty_port = OSPF_VTY_PORT;
 249           break;
 250         case 'u':
 251           ospfd_privs.user = optarg;
 252           break;
 253         case 'g':
 254           ospfd_privs.group = optarg;
 255           break;
 256 #ifdef SUPPORT_OSPF_API
 257         case 'a':
 258           ospf_apiserver_enable = 1;
 259           break;
 260 #endif /* SUPPORT_OSPF_API */
 261         case 'v':
 262           print_version (progname);
 263           exit (0);
 264           break;
 265         case 'C':
 266           dryrun = 1;
 267           break;
 268         case 'h':
 269           usage (progname, 0);
 270           break;
 271         default:
 272           usage (progname, 1);
 273           break;
 274         }
 275     }
 276
 277   /* Initializations. */
 278   master = om->master;
 279
 280   /* Library inits. */
 281   zprivs_init (&ospfd_privs);
 282   signal_init (master, Q_SIGC(ospf_signals), ospf_signals);
 283   cmd_init (1);
 284   debug_init ();
 285   vty_init (master);
 286   memory_init ();
 287
 288   access_list_init ();
 289   prefix_list_init ();
 290
 291   /* OSPFd inits. */
 292   ospf_if_init ();
 293   ospf_zebra_init ();
 294
 295   /* OSPF vty inits. */
 296   ospf_vty_init ();
 297   ospf_vty_show_init ();
 298
 299   ospf_route_map_init ();
 300 #ifdef HAVE_SNMP
 301   ospf_snmp_init ();
 302 #endif /* HAVE_SNMP */
 303 #ifdef HAVE_OPAQUE_LSA
 304   ospf_opaque_init ();
 305 #endif /* HAVE_OPAQUE_LSA */
 306
 307   sort_node ();
 308
 309   /* Get configuration file. */
 310   vty_read_config (config_file, config_default);
 311
 312   /* Start execution only if not in dry-run mode */
 313   if (dryrun)
 314     return(0);
 315
 316   /* Change to the daemon program. */
 317   if (daemon_mode && daemon (0, 0) < 0)
 318     {
 319       zlog_err("OSPFd daemon failed: %s", strerror(errno));
 320       exit (1);
 321     }
 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   /* Print banner. */
 330   zlog_notice ("OSPFd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
 331
 332   /* Fetch next active thread. */
 333   while (thread_fetch (master, &thread))
 334     thread_call (&thread);
 335
 336   /* Not reached. */
 337   return (0);
 338 }
 339