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