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
  38 #include "ospf6d.h"
  39
  40 /* Default configuration file name for ospf6d. */
  41 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  42
  43 /* Default port values. */
  44 #define OSPF6_VTY_PORT             2606
  45
  46 /* ospf6d privileges */
  47 zebra_capabilities_t _caps_p [] =
  48 {
  49   ZCAP_RAW,
  50   ZCAP_BIND
  51 };
  52
  53 struct zebra_privs_t ospf6d_privs =
  54 {
  55 #if defined(QUAGGA_USER)
  56   .user = QUAGGA_USER,
  57 #endif
  58 #if defined QUAGGA_GROUP
  59   .group = QUAGGA_GROUP,
  60 #endif
  61 #ifdef VTY_GROUP
  62   .vty_group = VTY_GROUP,
  63 #endif
  64   .caps_p = _caps_p,
  65   .cap_num_p = 2,
  66   .cap_num_i = 0
  67 };
  68
  69 /* ospf6d options, we use GNU getopt library. */
  70 struct option longopts[] =
  71 {
  72   { "daemon",      no_argument,       NULL, 'd'},
  73   { "config_file", required_argument, NULL, 'f'},
  74   { "pid_file",    required_argument, NULL, 'i'},
  75   { "vty_addr",    required_argument, NULL, 'A'},
  76   { "vty_port",    required_argument, NULL, 'P'},
  77   { "version",     no_argument,       NULL, 'v'},
  78   { "help",        no_argument,       NULL, 'h'},
  79   { 0 }
  80 };
  81
  82 /* Configuration file and directory. */
  83 char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
  84
  85 /* ospf6d program name. */
  86 char *progname;
  87
  88 /* is daemon? */
  89 int daemon_mode = 0;
  90
  91 /* Master of threads. */
  92 struct thread_master *master;
  93
  94 /* Process ID saved for use by init system */
  95 const char *pid_file = PATH_OSPF6D_PID;
  96
  97 /* Help information display. */
  98 static void
  99 usage (char *progname, int status)
 100 {
 101   if (status != 0)
 102     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 103   else
 104     {
 105       printf ("Usage : %s [OPTION...]\n\n\
 106 Daemon which manages OSPF version 3.\n\n\
 107 -d, --daemon       Runs in daemon mode\n\
 108 -f, --config_file  Set configuration file name\n\
 109 -i, --pid_file     Set process identifier file name\n\
 110 -A, --vty_addr     Set vty's bind address\n\
 111 -P, --vty_port     Set vty's port number\n\
 112 -v, --version      Print program version\n\
 113 -h, --help         Display this help and exit\n\
 114 \n\
 115 Report bugs to zebra@zebra.org\n", progname);
 116     }
 117
 118   exit (status);
 119 }
 120
 121 /* SIGHUP handler. */
 122 void
 123 sighup (void)
 124 {
 125   zlog_info ("SIGHUP received");
 126 }
 127
 128 /* SIGINT handler. */
 129 void
 130 sigint (void)
 131 {
 132   zlog_info ("SIGINT received");
 133   exit (0);
 134 }
 135
 136 /* SIGTERM handler. */
 137 void
 138 sigterm (void)
 139 {
 140   zlog_info ("SIGTERM received");
 141   exit (0);
 142 }
 143
 144 /* SIGUSR1 handler. */
 145 void
 146 sigusr1 (void)
 147 {
 148   zlog_info ("SIGUSR1 received");
 149   zlog_rotate (NULL);
 150 }
 151
 152 struct quagga_signal_t ospf6_signals[] =
 153 {
 154   {
 155     .signal = SIGHUP,
 156     .handler = &sighup,
 157   },
 158   {
 159     .signal = SIGINT,
 160     .handler = &sigint,
 161   },
 162   {
 163     .signal = SIGTERM,
 164     .handler = &sigterm,
 165   },
 166   {
 167     .signal = SIGUSR1,
 168     .handler = &sigusr1,
 169   },
 170 };
 171
 172 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 173    state machine is handled here. */
 174 int
 175 main (int argc, char *argv[], char *envp[])
 176 {
 177   char *p;
 178   int opt;
 179   char *vty_addr = NULL;
 180   int vty_port = 0;
 181   char *config_file = NULL;
 182   struct thread thread;
 183   int flag;
 184
 185   /* Set umask before anything for security */
 186   umask (0027);
 187
 188   /* Preserve name of myself. */
 189   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 190
 191   /* Command line argument treatment. */
 192   while (1)
 193     {
 194       opt = getopt_long (argc, argv, "df:i:hp:A:P:u:v", longopts, 0);
 195
 196       if (opt == EOF)
 197         break;
 198
 199       switch (opt)
 200         {
 201         case 0:
 202           break;
 203         case 'd':
 204           daemon_mode = 1;
 205           break;
 206         case 'f':
 207           config_file = optarg;
 208           break;
 209         case 'A':
 210           vty_addr = optarg;
 211           break;
 212         case 'i':
 213           pid_file = optarg;
 214           break;
 215         case 'P':
 216          /* Deal with atoi() returning 0 on failure, and ospf6d not
 217              listening on ospf6d port... */
 218           if (strcmp(optarg, "0") == 0)
 219             {
 220               vty_port = 0;
 221               break;
 222             }
 223           vty_port = atoi (optarg);
 224           vty_port = (vty_port ? vty_port : OSPF6_VTY_PORT);
 225           break;
 226         case 'u':
 227           ospf6d_privs.user = ospf6d_privs.group = optarg;
 228           break;
 229         case 'v':
 230           print_version (progname);
 231           exit (0);
 232           break;
 233         case 'h':
 234           usage (progname, 0);
 235           break;
 236         default:
 237           usage (progname, 1);
 238           break;
 239         }
 240     }
 241
 242   /* thread master */
 243   master = thread_master_create ();
 244
 245   /* Initializations. */
 246   if (! daemon_mode)
 247     flag = ZLOG_STDOUT;
 248   else
 249     flag = 0;
 250
 251   zlog_default = openzlog (progname, flag, ZLOG_OSPF6,
 252                            LOG_CONS|LOG_NDELAY|LOG_PID,
 253                            LOG_DAEMON);
 254   zprivs_init (&ospf6d_privs);
 255   /* initialize zebra libraries */
 256   signal_init (master, Q_SIGC(ospf6_signals), ospf6_signals);
 257   cmd_init (1);
 258   vty_init (master);
 259   memory_init ();
 260   if_init ();
 261   access_list_init ();
 262   prefix_list_init ();
 263
 264   /* initialize ospf6 */
 265   ospf6_init ();
 266
 267   /* sort command vector */
 268   sort_node ();
 269
 270   /* parse config file */
 271   vty_read_config (config_file, config_default);
 272
 273   if (daemon_mode)
 274     daemon (0, 0);
 275
 276   /* pid file create */
 277 #if 0
 278   pid_output_lock (pid_file);
 279 #else
 280   pid_output (pid_file);
 281 #endif
 282
 283   /* Make ospf6 vty socket. */
 284   vty_serv_sock (vty_addr,
 285                  vty_port ? vty_port : OSPF6_VTY_PORT, OSPF6_VTYSH_PATH);
 286
 287   /* Print start message */
 288   zlog_notice ("OSPF6d (Quagga-%s ospf6d-%s) starts",
 289                QUAGGA_VERSION, OSPF6_DAEMON_VERSION);
 290
 291   /* Start finite state machine, here we go! */
 292   while (thread_fetch (master, &thread))
 293     thread_call (&thread);
 294
 295   /* Log in case thread failed */
 296   zlog_warn ("Thread failed");
 297
 298   /* Not reached. */
 299   exit (0);
 300 }
 301
 302