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