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   { "dryrun",      no_argument,       NULL, 'C'},
  81   { "help",        no_argument,       NULL, 'h'},
  82   { 0 }
  83 };
  84
  85 /* Configuration file and directory. */
  86 char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
  87
  88 /* ospf6d program name. */
  89 char *progname;
  90
  91 /* is daemon? */
  92 int daemon_mode = 0;
  93
  94 /* Master of threads. */
  95 struct thread_master *master;
  96
  97 /* Process ID saved for use by init system */
  98 const char *pid_file = PATH_OSPF6D_PID;
  99
 100 /* Help information display. */
 101 static void
 102 usage (char *progname, int status)
 103 {
 104   if (status != 0)
 105     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 106   else
 107     {
 108       printf ("Usage : %s [OPTION...]\n\n\
 109 Daemon which manages OSPF version 3.\n\n\
 110 -d, --daemon       Runs in daemon mode\n\
 111 -f, --config_file  Set configuration file name\n\
 112 -i, --pid_file     Set process identifier file name\n\
 113 -A, --vty_addr     Set vty's bind address\n\
 114 -P, --vty_port     Set vty's port number\n\
 115 -u, --user         User to run as\n\
 116 -g, --group        Group to run as\n\
 117 -v, --version      Print program version\n\
 118 -C, --dryrun       Check configuration for validity and exit\n\
 119 -h, --help         Display this help and exit\n\
 120 \n\
 121 Report bugs to zebra@zebra.org\n", progname);
 122     }
 123
 124   exit (status);
 125 }
 126
 127 /* SIGHUP handler. */
 128 static void
 129 sighup (void)
 130 {
 131   zlog_info ("SIGHUP received");
 132 }
 133
 134 /* SIGINT handler. */
 135 static void
 136 sigint (void)
 137 {
 138   zlog_notice ("Terminating on signal SIGINT");
 139   exit (0);
 140 }
 141
 142 /* SIGTERM handler. */
 143 static void
 144 sigterm (void)
 145 {
 146   zlog_notice ("Terminating on signal SIGTERM");
 147   exit (0);
 148 }
 149
 150 /* SIGUSR1 handler. */
 151 static void
 152 sigusr1 (void)
 153 {
 154   zlog_info ("SIGUSR1 received");
 155   zlog_rotate (NULL);
 156 }
 157
 158 struct quagga_signal_t ospf6_signals[] =
 159 {
 160   {
 161     .signal = SIGHUP,
 162     .handler = &sighup,
 163   },
 164   {
 165     .signal = SIGINT,
 166     .handler = &sigint,
 167   },
 168   {
 169     .signal = SIGTERM,
 170     .handler = &sigterm,
 171   },
 172   {
 173     .signal = SIGUSR1,
 174     .handler = &sigusr1,
 175   },
 176 };
 177
 178 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 179    state machine is handled here. */
 180 int
 181 main (int argc, char *argv[], char *envp[])
 182 {
 183   char *p;
 184   int opt;
 185   char *vty_addr = NULL;
 186   int vty_port = 0;
 187   char *config_file = NULL;
 188   struct thread thread;
 189   int dryrun = 0;
 190
 191   /* Set umask before anything for security */
 192   umask (0027);
 193
 194   /* Preserve name of myself. */
 195   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 196
 197   /* Command line argument treatment. */
 198   while (1)
 199     {
 200       opt = getopt_long (argc, argv, "df:i:hp:A:P:u:g:vC", longopts, 0);
 201
 202       if (opt == EOF)
 203         break;
 204
 205       switch (opt)
 206         {
 207         case 0:
 208           break;
 209         case 'd':
 210           daemon_mode = 1;
 211           break;
 212         case 'f':
 213           config_file = optarg;
 214           break;
 215         case 'A':
 216           vty_addr = optarg;
 217           break;
 218         case 'i':
 219           pid_file = optarg;
 220           break;
 221         case 'P':
 222          /* Deal with atoi() returning 0 on failure, and ospf6d not
 223              listening on ospf6d port... */
 224           if (strcmp(optarg, "0") == 0)
 225             {
 226               vty_port = 0;
 227               break;
 228             }
 229           vty_port = atoi (optarg);
 230           if (vty_port <= 0 || vty_port > 0xffff)
 231             vty_port = OSPF6_VTY_PORT;
 232           break;
 233         case 'u':
 234           ospf6d_privs.user = optarg;
 235           break;
 236         case 'g':
 237           ospf6d_privs.group = optarg;
 238           break;
 239         case 'v':
 240           print_version (progname);
 241           exit (0);
 242           break;
 243         case 'C':
 244           dryrun = 1;
 245           break;
 246         case 'h':
 247           usage (progname, 0);
 248           break;
 249         default:
 250           usage (progname, 1);
 251           break;
 252         }
 253     }
 254
 255   /* thread master */
 256   master = thread_master_create ();
 257
 258   /* Initializations. */
 259   zlog_default = openzlog (progname, ZLOG_OSPF6,
 260                            LOG_CONS|LOG_NDELAY|LOG_PID,
 261                            LOG_DAEMON);
 262   zprivs_init (&ospf6d_privs);
 263   /* initialize zebra libraries */
 264   signal_init (master, Q_SIGC(ospf6_signals), ospf6_signals);
 265   cmd_init (1);
 266   vty_init (master);
 267   memory_init ();
 268   if_init ();
 269   access_list_init ();
 270   prefix_list_init ();
 271
 272   /* initialize ospf6 */
 273   ospf6_init ();
 274
 275   /* sort command vector */
 276   sort_node ();
 277
 278   /* parse config file */
 279   vty_read_config (config_file, config_default);
 280
 281   /* Start execution only if not in dry-run mode */
 282   if (dryrun)
 283     return(0);
 284
 285   if (daemon_mode && daemon (0, 0) < 0)
 286     {
 287       zlog_err("OSPF6d daemon failed: %s", strerror(errno));
 288       exit (1);
 289     }
 290
 291   /* pid file create */
 292   pid_output (pid_file);
 293
 294   /* Make ospf6 vty socket. */
 295   if (!vty_port)
 296     vty_port = OSPF6_VTY_PORT;
 297   vty_serv_sock (vty_addr, vty_port, OSPF6_VTYSH_PATH);
 298
 299   /* Print start message */
 300   zlog_notice ("OSPF6d (Quagga-%s ospf6d-%s) starts: vty@%d",
 301                QUAGGA_VERSION, OSPF6_DAEMON_VERSION,vty_port);
 302
 303   /* Start finite state machine, here we go! */
 304   while (thread_fetch (master, &thread))
 305     thread_call (&thread);
 306
 307   /* Log in case thread failed */
 308   zlog_warn ("Thread failed");
 309
 310   /* Not reached. */
 311   exit (0);
 312 }
 313
 314