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 "memory_vty.h"
  33 #include "if.h"
  34 #include "filter.h"
  35 #include "prefix.h"
  36 #include "plist.h"
  37 #include "privs.h"
  38 #include "sigevent.h"
  39 #include "zclient.h"
  40 #include "vrf.h"
  41 #include "bfd.h"
  42
  43 #include "ospf6d.h"
  44 #include "ospf6_top.h"
  45 #include "ospf6_message.h"
  46 #include "ospf6_asbr.h"
  47 #include "ospf6_lsa.h"
  48 #include "ospf6_interface.h"
  49 #include "ospf6_zebra.h"
  50
  51 /* Default configuration file name for ospf6d. */
  52 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  53
  54 /* Default port values. */
  55 #define OSPF6_VTY_PORT             2606
  56
  57 /* ospf6d privileges */
  58 zebra_capabilities_t _caps_p [] =
  59 {
  60   ZCAP_NET_RAW,
  61   ZCAP_BIND
  62 };
  63
  64 struct zebra_privs_t ospf6d_privs =
  65 {
  66 #if defined(QUAGGA_USER)
  67   .user = QUAGGA_USER,
  68 #endif
  69 #if defined QUAGGA_GROUP
  70   .group = QUAGGA_GROUP,
  71 #endif
  72 #ifdef VTY_GROUP
  73   .vty_group = VTY_GROUP,
  74 #endif
  75   .caps_p = _caps_p,
  76   .cap_num_p = 2,
  77   .cap_num_i = 0
  78 };
  79
  80 /* ospf6d options, we use GNU getopt library. */
  81 struct option longopts[] =
  82 {
  83   { "daemon",      no_argument,       NULL, 'd'},
  84   { "config_file", required_argument, NULL, 'f'},
  85   { "pid_file",    required_argument, NULL, 'i'},
  86   { "socket",      required_argument, NULL, 'z'},
  87   { "vty_addr",    required_argument, NULL, 'A'},
  88   { "vty_port",    required_argument, NULL, 'P'},
  89   { "user",        required_argument, NULL, 'u'},
  90   { "group",       required_argument, NULL, 'g'},
  91   { "version",     no_argument,       NULL, 'v'},
  92   { "dryrun",      no_argument,       NULL, 'C'},
  93   { "help",        no_argument,       NULL, 'h'},
  94   { 0 }
  95 };
  96
  97 /* Configuration file and directory. */
  98 char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
  99
 100 /* ospf6d program name. */
 101 char *progname;
 102
 103 /* is daemon? */
 104 int daemon_mode = 0;
 105
 106 /* Master of threads. */
 107 struct thread_master *master;
 108
 109 /* Process ID saved for use by init system */
 110 const char *pid_file = PATH_OSPF6D_PID;
 111
 112 /* Help information display. */
 113 static void
 114 usage (char *progname, int status)
 115 {
 116   if (status != 0)
 117     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 118   else
 119     {
 120       printf ("Usage : %s [OPTION...]\n\n\
 121 Daemon which manages OSPF version 3.\n\n\
 122 -d, --daemon       Runs in daemon mode\n\
 123 -f, --config_file  Set configuration file name\n\
 124 -i, --pid_file     Set process identifier file name\n\
 125 -z, --socket       Set path of zebra socket\n\
 126 -A, --vty_addr     Set vty's bind address\n\
 127 -P, --vty_port     Set vty's port number\n\
 128 -u, --user         User to run as\n\
 129 -g, --group        Group to run as\n\
 130 -v, --version      Print program version\n\
 131 -C, --dryrun       Check configuration for validity and exit\n\
 132 -h, --help         Display this help and exit\n\
 133 \n\
 134 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 135     }
 136
 137   exit (status);
 138 }
 139
 140 static void __attribute__ ((noreturn))
 141 ospf6_exit (int status)
 142 {
 143   struct listnode *node;
 144   struct interface *ifp;
 145
 146   if (ospf6)
 147     ospf6_delete (ospf6);
 148
 149   bfd_gbl_exit();
 150
 151   for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp))
 152     if (ifp->info != NULL)
 153       ospf6_interface_delete(ifp->info);
 154
 155   ospf6_message_terminate ();
 156   ospf6_asbr_terminate ();
 157   ospf6_lsa_terminate ();
 158
 159   vrf_terminate ();
 160   vty_terminate ();
 161   cmd_terminate ();
 162
 163   if (zclient)
 164     zclient_free (zclient);
 165
 166   if (master)
 167     thread_master_free (master);
 168
 169   if (zlog_default)
 170     closezlog (zlog_default);
 171
 172   exit (status);
 173 }
 174
 175 /* SIGHUP handler. */
 176 static void
 177 sighup (void)
 178 {
 179   zlog_info ("SIGHUP received");
 180 }
 181
 182 /* SIGINT handler. */
 183 static void
 184 sigint (void)
 185 {
 186   zlog_notice ("Terminating on signal SIGINT");
 187   ospf6_exit (0);
 188 }
 189
 190 /* SIGTERM handler. */
 191 static void
 192 sigterm (void)
 193 {
 194   zlog_notice ("Terminating on signal SIGTERM");
 195   ospf6_clean();
 196   ospf6_exit (0);
 197 }
 198
 199 /* SIGUSR1 handler. */
 200 static void
 201 sigusr1 (void)
 202 {
 203   zlog_info ("SIGUSR1 received");
 204   zlog_rotate (NULL);
 205 }
 206
 207 struct quagga_signal_t ospf6_signals[] =
 208 {
 209   {
 210     .signal = SIGHUP,
 211     .handler = &sighup,
 212   },
 213   {
 214     .signal = SIGINT,
 215     .handler = &sigint,
 216   },
 217   {
 218     .signal = SIGTERM,
 219     .handler = &sigterm,
 220   },
 221   {
 222     .signal = SIGUSR1,
 223     .handler = &sigusr1,
 224   },
 225 };
 226
 227 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 228    state machine is handled here. */
 229 int
 230 main (int argc, char *argv[], char *envp[])
 231 {
 232   char *p;
 233   int opt;
 234   char *vty_addr = NULL;
 235   int vty_port = 0;
 236   char *config_file = NULL;
 237   struct thread thread;
 238   int dryrun = 0;
 239
 240   /* Set umask before anything for security */
 241   umask (0027);
 242
 243   /* Preserve name of myself. */
 244   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 245
 246   /* Seed random number for LSA ID */
 247   srandom (time(NULL));
 248
 249   /* Command line argument treatment. */
 250   while (1)
 251     {
 252       opt = getopt_long (argc, argv, "df:i:z:hp:A:P:u:g:vC", longopts, 0);
 253
 254       if (opt == EOF)
 255         break;
 256
 257       switch (opt)
 258         {
 259         case 0:
 260           break;
 261         case 'd':
 262           daemon_mode = 1;
 263           break;
 264         case 'f':
 265           config_file = optarg;
 266           break;
 267         case 'A':
 268           vty_addr = optarg;
 269           break;
 270         case 'i':
 271           pid_file = optarg;
 272           break;
 273         case 'z':
 274           zclient_serv_path_set (optarg);
 275           break;
 276         case 'P':
 277          /* Deal with atoi() returning 0 on failure, and ospf6d not
 278              listening on ospf6d port... */
 279           if (strcmp(optarg, "0") == 0)
 280             {
 281               vty_port = 0;
 282               break;
 283             }
 284           vty_port = atoi (optarg);
 285           if (vty_port <= 0 || vty_port > 0xffff)
 286             vty_port = OSPF6_VTY_PORT;
 287           break;
 288         case 'u':
 289           ospf6d_privs.user = optarg;
 290           break;
 291         case 'g':
 292           ospf6d_privs.group = optarg;
 293           break;
 294         case 'v':
 295           print_version (progname);
 296           exit (0);
 297           break;
 298         case 'C':
 299           dryrun = 1;
 300           break;
 301         case 'h':
 302           usage (progname, 0);
 303           break;
 304         default:
 305           usage (progname, 1);
 306           break;
 307         }
 308     }
 309
 310   if (geteuid () != 0)
 311     {
 312       errno = EPERM;
 313       perror (progname);
 314       exit (1);
 315     }
 316
 317   /* thread master */
 318   master = thread_master_create ();
 319
 320   /* Initializations. */
 321   zlog_default = openzlog (progname, ZLOG_OSPF6, 0,
 322                            LOG_CONS|LOG_NDELAY|LOG_PID,
 323                            LOG_DAEMON);
 324   zprivs_init (&ospf6d_privs);
 325 #if defined(HAVE_CUMULUS)
 326   zlog_set_level (NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl);
 327 #endif
 328
 329   /* initialize zebra libraries */
 330   signal_init (master, array_size(ospf6_signals), ospf6_signals);
 331   cmd_init (1);
 332   vty_init (master);
 333   memory_init ();
 334   vrf_init ();
 335   access_list_init ();
 336   prefix_list_init ();
 337
 338   /* initialize ospf6 */
 339   ospf6_init ();
 340
 341   /* parse config file */
 342   vty_read_config (config_file, config_default);
 343
 344   /* Start execution only if not in dry-run mode */
 345   if (dryrun)
 346     return(0);
 347
 348   if (daemon_mode && daemon (0, 0) < 0)
 349     {
 350       zlog_err("OSPF6d daemon failed: %s", strerror(errno));
 351       exit (1);
 352     }
 353
 354   /* pid file create */
 355   pid_output (pid_file);
 356
 357   /* Make ospf6 vty socket. */
 358   if (!vty_port)
 359     vty_port = OSPF6_VTY_PORT;
 360   vty_serv_sock (vty_addr, vty_port, OSPF6_VTYSH_PATH);
 361
 362   /* Print start message */
 363   zlog_notice ("OSPF6d (Quagga-%s ospf6d-%s) starts: vty@%d",
 364                QUAGGA_VERSION, OSPF6_DAEMON_VERSION,vty_port);
 365
 366   /* Start finite state machine, here we go! */
 367   while (thread_fetch (master, &thread))
 368     thread_call (&thread);
 369
 370   /* Log in case thread failed */
 371   zlog_warn ("Thread failed");
 372
 373   /* Not reached. */
 374   ospf6_exit (0);
 375 }
 376
 377