ospf6d/ospf6_main.c

   1 /*
   2  * Copyright (C) 1999 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23 #include <lib/version.h>
  24 #include <stdlib.h>
  25
  26 #include "getopt.h"
  27 #include "thread.h"
  28 #include "log.h"
  29 #include "command.h"
  30 #include "vty.h"
  31 #include "memory.h"
  32 #include "if.h"
  33 #include "filter.h"
  34 #include "prefix.h"
  35 #include "plist.h"
  36 #include "privs.h"
  37 #include "sigevent.h"
  38 #include "zclient.h"
  39 #include "vrf.h"
  40
  41 #include "ospf6d.h"
  42 #include "ospf6_top.h"
  43 #include "ospf6_message.h"
  44 #include "ospf6_asbr.h"
  45 #include "ospf6_lsa.h"
  46 #include "ospf6_interface.h"
  47 #include "ospf6_zebra.h"
  48
  49 /* Default configuration file name for ospf6d. */
  50 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  51
  52 /* Default port values. */
  53 #define OSPF6_VTY_PORT             2606
  54
  55 /* ospf6d privileges */
  56 zebra_capabilities_t _caps_p [] =
  57 {
  58   ZCAP_NET_RAW,
  59   ZCAP_BIND
  60 };
  61
  62 struct zebra_privs_t ospf6d_privs =
  63 {
  64 #if defined(QUAGGA_USER)
  65   .user = QUAGGA_USER,
  66 #endif
  67 #if defined QUAGGA_GROUP
  68   .group = QUAGGA_GROUP,
  69 #endif
  70 #ifdef VTY_GROUP
  71   .vty_group = VTY_GROUP,
  72 #endif
  73   .caps_p = _caps_p,
  74   .cap_num_p = 2,
  75   .cap_num_i = 0
  76 };
  77
  78 /* ospf6d options, we use GNU getopt library. */
  79 struct option longopts[] =
  80 {
  81   { "daemon",      no_argument,       NULL, 'd'},
  82   { "config_file", required_argument, NULL, 'f'},
  83   { "pid_file",    required_argument, NULL, 'i'},
  84   { "socket",      required_argument, NULL, 'z'},
  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   { "version",     no_argument,       NULL, 'v'},
  90   { "dryrun",      no_argument,       NULL, 'C'},
  91   { "help",        no_argument,       NULL, 'h'},
  92   { 0 }
  93 };
  94
  95 /* Configuration file and directory. */
  96 char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
  97
  98 /* ospf6d program name. */
  99 char *progname;
 100
 101 /* is daemon? */
 102 int daemon_mode = 0;
 103
 104 /* Master of threads. */
 105 struct thread_master *master;
 106
 107 /* Process ID saved for use by init system */
 108 const char *pid_file = PATH_OSPF6D_PID;
 109
 110 /* Help information display. */
 111 static void
 112 usage (char *progname, int status)
 113 {
 114   if (status != 0)
 115     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 116   else
 117     {
 118       printf ("Usage : %s [OPTION...]\n\n\
 119 Daemon which manages OSPF version 3.\n\n\
 120 -d, --daemon       Runs in daemon mode\n\
 121 -f, --config_file  Set configuration file name\n\
 122 -i, --pid_file     Set process identifier file name\n\
 123 -z, --socket       Set path of zebra socket\n\
 124 -A, --vty_addr     Set vty's bind address\n\
 125 -P, --vty_port     Set vty's port number\n\
 126 -u, --user         User to run as\n\
 127 -g, --group        Group to run as\n\
 128 -v, --version      Print program version\n\
 129 -C, --dryrun       Check configuration for validity and exit\n\
 130 -h, --help         Display this help and exit\n\
 131 \n\
 132 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 133     }
 134
 135   exit (status);
 136 }
 137
 138 static void __attribute__ ((noreturn))
 139 ospf6_exit (int status)
 140 {
 141   struct listnode *node;
 142   struct interface *ifp;
 143
 144   if (ospf6)
 145     ospf6_delete (ospf6);
 146
 147   for (ALL_LIST_ELEMENTS_RO(iflist, node, ifp))
 148     if (ifp->info != NULL)
 149       ospf6_interface_delete(ifp->info);
 150
 151   ospf6_message_terminate ();
 152   ospf6_asbr_terminate ();
 153   ospf6_lsa_terminate ();
 154
 155   vrf_terminate ();
 156   vty_terminate ();
 157   cmd_terminate ();
 158
 159   if (zclient)
 160     zclient_free (zclient);
 161
 162   if (master)
 163     thread_master_free (master);
 164
 165   if (zlog_default)
 166     closezlog (zlog_default);
 167
 168   exit (status);
 169 }
 170
 171 /* SIGHUP handler. */
 172 static void
 173 sighup (void)
 174 {
 175   zlog_info ("SIGHUP received");
 176 }
 177
 178 /* SIGINT handler. */
 179 static void
 180 sigint (void)
 181 {
 182   zlog_notice ("Terminating on signal SIGINT");
 183   ospf6_exit (0);
 184 }
 185
 186 /* SIGTERM handler. */
 187 static void
 188 sigterm (void)
 189 {
 190   zlog_notice ("Terminating on signal SIGTERM");
 191   ospf6_clean();
 192   ospf6_exit (0);
 193 }
 194
 195 /* SIGUSR1 handler. */
 196 static void
 197 sigusr1 (void)
 198 {
 199   zlog_info ("SIGUSR1 received");
 200   zlog_rotate (NULL);
 201 }
 202
 203 struct quagga_signal_t ospf6_signals[] =
 204 {
 205   {
 206     .signal = SIGHUP,
 207     .handler = &sighup,
 208   },
 209   {
 210     .signal = SIGINT,
 211     .handler = &sigint,
 212   },
 213   {
 214     .signal = SIGTERM,
 215     .handler = &sigterm,
 216   },
 217   {
 218     .signal = SIGUSR1,
 219     .handler = &sigusr1,
 220   },
 221 };
 222
 223 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 224    state machine is handled here. */
 225 int
 226 main (int argc, char *argv[], char *envp[])
 227 {
 228   char *p;
 229   int opt;
 230   char *vty_addr = NULL;
 231   int vty_port = 0;
 232   char *config_file = NULL;
 233   struct thread thread;
 234   int dryrun = 0;
 235
 236   /* Set umask before anything for security */
 237   umask (0027);
 238
 239   /* Preserve name of myself. */
 240   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 241
 242   /* Seed random number for LSA ID */
 243   srand (time(NULL));
 244
 245   /* Command line argument treatment. */
 246   while (1)
 247     {
 248       opt = getopt_long (argc, argv, "df:i:z:hp:A:P:u:g:vC", longopts, 0);
 249
 250       if (opt == EOF)
 251         break;
 252
 253       switch (opt)
 254         {
 255         case 0:
 256           break;
 257         case 'd':
 258           daemon_mode = 1;
 259           break;
 260         case 'f':
 261           config_file = optarg;
 262           break;
 263         case 'A':
 264           vty_addr = optarg;
 265           break;
 266         case 'i':
 267           pid_file = optarg;
 268           break;
 269         case 'z':
 270           zclient_serv_path_set (optarg);
 271           break;
 272         case 'P':
 273          /* Deal with atoi() returning 0 on failure, and ospf6d not
 274              listening on ospf6d port... */
 275           if (strcmp(optarg, "0") == 0)
 276             {
 277               vty_port = 0;
 278               break;
 279             }
 280           vty_port = atoi (optarg);
 281           if (vty_port <= 0 || vty_port > 0xffff)
 282             vty_port = OSPF6_VTY_PORT;
 283           break;
 284         case 'u':
 285           ospf6d_privs.user = optarg;
 286           break;
 287         case 'g':
 288           ospf6d_privs.group = optarg;
 289           break;
 290         case 'v':
 291           print_version (progname);
 292           exit (0);
 293           break;
 294         case 'C':
 295           dryrun = 1;
 296           break;
 297         case 'h':
 298           usage (progname, 0);
 299           break;
 300         default:
 301           usage (progname, 1);
 302           break;
 303         }
 304     }
 305
 306   if (geteuid () != 0)
 307     {
 308       errno = EPERM;
 309       perror (progname);
 310       exit (1);
 311     }
 312
 313   /* thread master */
 314   master = thread_master_create ();
 315
 316   /* Initializations. */
 317   zlog_default = openzlog (progname, ZLOG_OSPF6, 0,
 318                            LOG_CONS|LOG_NDELAY|LOG_PID,
 319                            LOG_DAEMON);
 320   zprivs_init (&ospf6d_privs);
 321   /* initialize zebra libraries */
 322   signal_init (master, array_size(ospf6_signals), ospf6_signals);
 323   cmd_init (1);
 324   vty_init (master);
 325   memory_init ();
 326   vrf_init ();
 327   access_list_init ();
 328   prefix_list_init ();
 329
 330   /* initialize ospf6 */
 331   ospf6_init ();
 332
 333   /* parse config file */
 334   vty_read_config (config_file, config_default);
 335
 336   /* Start execution only if not in dry-run mode */
 337   if (dryrun)
 338     return(0);
 339
 340   if (daemon_mode && daemon (0, 0) < 0)
 341     {
 342       zlog_err("OSPF6d daemon failed: %s", strerror(errno));
 343       exit (1);
 344     }
 345
 346   /* pid file create */
 347   pid_output (pid_file);
 348
 349   /* Make ospf6 vty socket. */
 350   if (!vty_port)
 351     vty_port = OSPF6_VTY_PORT;
 352   vty_serv_sock (vty_addr, vty_port, OSPF6_VTYSH_PATH);
 353
 354   /* Print start message */
 355   zlog_notice ("OSPF6d (Quagga-%s ospf6d-%s) starts: vty@%d",
 356                QUAGGA_VERSION, OSPF6_DAEMON_VERSION,vty_port);
 357
 358   /* Start finite state machine, here we go! */
 359   while (thread_fetch (master, &thread))
 360     thread_call (&thread);
 361
 362   /* Log in case thread failed */
 363   zlog_warn ("Thread failed");
 364
 365   /* Not reached. */
 366   ospf6_exit (0);
 367 }
 368
 369