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