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 static void
 128 ospf6_exit (int status)
 129 {
 130   extern struct ospf6 *ospf6;
 131   extern struct zclient *zclient;
 132
 133   if (ospf6)
 134     ospf6_delete (ospf6);
 135
 136   ospf6_message_terminate ();
 137   ospf6_asbr_terminate ();
 138   ospf6_lsa_terminate ();
 139
 140   if_terminate ();
 141   vty_terminate ();
 142   cmd_terminate ();
 143
 144   if (zclient)
 145     zclient_free (zclient);
 146
 147   if (master)
 148     thread_master_free (master);
 149
 150   if (zlog_default)
 151     closezlog (zlog_default);
 152
 153   exit (status);
 154 }
 155
 156 /* SIGHUP handler. */
 157 static void
 158 sighup (void)
 159 {
 160   zlog_info ("SIGHUP received");
 161 }
 162
 163 /* SIGINT handler. */
 164 static void
 165 sigint (void)
 166 {
 167   zlog_notice ("Terminating on signal SIGINT");
 168   ospf6_exit (0);
 169 }
 170
 171 /* SIGTERM handler. */
 172 static void
 173 sigterm (void)
 174 {
 175   zlog_notice ("Terminating on signal SIGTERM");
 176   ospf6_exit (0);
 177 }
 178
 179 /* SIGUSR1 handler. */
 180 static void
 181 sigusr1 (void)
 182 {
 183   zlog_info ("SIGUSR1 received");
 184   zlog_rotate (NULL);
 185 }
 186
 187 struct quagga_signal_t ospf6_signals[] =
 188 {
 189   {
 190     .signal = SIGHUP,
 191     .handler = &sighup,
 192   },
 193   {
 194     .signal = SIGINT,
 195     .handler = &sigint,
 196   },
 197   {
 198     .signal = SIGTERM,
 199     .handler = &sigterm,
 200   },
 201   {
 202     .signal = SIGUSR1,
 203     .handler = &sigusr1,
 204   },
 205 };
 206
 207 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 208    state machine is handled here. */
 209 int
 210 main (int argc, char *argv[], char *envp[])
 211 {
 212   char *p;
 213   int opt;
 214   char *vty_addr = NULL;
 215   int vty_port = 0;
 216   char *config_file = NULL;
 217   struct thread thread;
 218   int dryrun = 0;
 219
 220   /* Set umask before anything for security */
 221   umask (0027);
 222
 223   /* Preserve name of myself. */
 224   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 225
 226   /* Command line argument treatment. */
 227   while (1)
 228     {
 229       opt = getopt_long (argc, argv, "df:i:hp:A:P:u:g:vC", longopts, 0);
 230
 231       if (opt == EOF)
 232         break;
 233
 234       switch (opt)
 235         {
 236         case 0:
 237           break;
 238         case 'd':
 239           daemon_mode = 1;
 240           break;
 241         case 'f':
 242           config_file = optarg;
 243           break;
 244         case 'A':
 245           vty_addr = optarg;
 246           break;
 247         case 'i':
 248           pid_file = optarg;
 249           break;
 250         case 'P':
 251          /* Deal with atoi() returning 0 on failure, and ospf6d not
 252              listening on ospf6d port... */
 253           if (strcmp(optarg, "0") == 0)
 254             {
 255               vty_port = 0;
 256               break;
 257             }
 258           vty_port = atoi (optarg);
 259           if (vty_port <= 0 || vty_port > 0xffff)
 260             vty_port = OSPF6_VTY_PORT;
 261           break;
 262         case 'u':
 263           ospf6d_privs.user = optarg;
 264           break;
 265         case 'g':
 266           ospf6d_privs.group = optarg;
 267           break;
 268         case 'v':
 269           print_version (progname);
 270           exit (0);
 271           break;
 272         case 'C':
 273           dryrun = 1;
 274           break;
 275         case 'h':
 276           usage (progname, 0);
 277           break;
 278         default:
 279           usage (progname, 1);
 280           break;
 281         }
 282     }
 283
 284   /* thread master */
 285   master = thread_master_create ();
 286
 287   /* Initializations. */
 288   zlog_default = openzlog (progname, ZLOG_OSPF6,
 289                            LOG_CONS|LOG_NDELAY|LOG_PID,
 290                            LOG_DAEMON);
 291   zprivs_init (&ospf6d_privs);
 292   /* initialize zebra libraries */
 293   signal_init (master, Q_SIGC(ospf6_signals), ospf6_signals);
 294   cmd_init (1);
 295   vty_init (master);
 296   memory_init ();
 297   if_init ();
 298   access_list_init ();
 299   prefix_list_init ();
 300
 301   /* initialize ospf6 */
 302   ospf6_init ();
 303
 304   /* sort command vector */
 305   sort_node ();
 306
 307   /* parse config file */
 308   vty_read_config (config_file, config_default);
 309
 310   /* Start execution only if not in dry-run mode */
 311   if (dryrun)
 312     return(0);
 313
 314   if (daemon_mode && daemon (0, 0) < 0)
 315     {
 316       zlog_err("OSPF6d daemon failed: %s", strerror(errno));
 317       exit (1);
 318     }
 319
 320   /* pid file create */
 321   pid_output (pid_file);
 322
 323   /* Make ospf6 vty socket. */
 324   if (!vty_port)
 325     vty_port = OSPF6_VTY_PORT;
 326   vty_serv_sock (vty_addr, vty_port, OSPF6_VTYSH_PATH);
 327
 328   /* Print start message */
 329   zlog_notice ("OSPF6d (Quagga-%s ospf6d-%s) starts: vty@%d",
 330                QUAGGA_VERSION, OSPF6_DAEMON_VERSION,vty_port);
 331
 332   /* Start finite state machine, here we go! */
 333   while (thread_fetch (master, &thread))
 334     thread_call (&thread);
 335
 336   /* Log in case thread failed */
 337   zlog_warn ("Thread failed");
 338
 339   /* Not reached. */
 340   ospf6_exit (0);
 341 }
 342
 343