ripngd/ripng_main.c

   1 /*
   2  * RIPngd main routine.
   3  * Copyright (C) 1998, 1999 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20  * 02111-1307, USA.
  21  */
  22
  23 #include <zebra.h>
  24
  25 #include <lib/version.h>
  26 #include "getopt.h"
  27 #include "vector.h"
  28 #include "vty.h"
  29 #include "command.h"
  30 #include "memory.h"
  31 #include "thread.h"
  32 #include "log.h"
  33 #include "prefix.h"
  34 #include "if.h"
  35 #include "privs.h"
  36 #include "sigevent.h"
  37
  38 #include "ripngd/ripngd.h"
  39
  40 /* Configuration filename and directory. */
  41 char config_default[] = SYSCONFDIR RIPNG_DEFAULT_CONFIG;
  42 char *config_file = NULL;
  43
  44 /* RIPngd options. */
  45 struct option longopts[] =
  46 {
  47   { "daemon",      no_argument,       NULL, 'd'},
  48   { "config_file", required_argument, NULL, 'f'},
  49   { "pid_file",    required_argument, NULL, 'i'},
  50   { "dryrun",      no_argument,       NULL, 'C'},
  51   { "help",        no_argument,       NULL, 'h'},
  52   { "vty_addr",    required_argument, NULL, 'A'},
  53   { "vty_port",    required_argument, NULL, 'P'},
  54   { "retain",      no_argument,       NULL, 'r'},
  55   { "user",        required_argument, NULL, 'u'},
  56   { "group",       required_argument, NULL, 'g'},
  57   { "version",     no_argument,       NULL, 'v'},
  58   { 0 }
  59 };
  60
  61 /* ripngd privileges */
  62 zebra_capabilities_t _caps_p [] =
  63 {
  64   ZCAP_NET_RAW,
  65   ZCAP_BIND
  66 };
  67
  68 struct zebra_privs_t ripngd_privs =
  69 {
  70 #if defined(QUAGGA_USER)
  71   .user = QUAGGA_USER,
  72 #endif
  73 #if defined QUAGGA_GROUP
  74   .group = QUAGGA_GROUP,
  75 #endif
  76 #ifdef VTY_GROUP
  77   .vty_group = VTY_GROUP,
  78 #endif
  79   .caps_p = _caps_p,
  80   .cap_num_p = 2,
  81   .cap_num_i = 0
  82 };
  83
  84
  85 /* RIPngd program name */
  86
  87 /* Route retain mode flag. */
  88 int retain_mode = 0;
  89
  90 /* RIPng VTY bind address. */
  91 char *vty_addr = NULL;
  92
  93 /* RIPng VTY connection port. */
  94 int vty_port = RIPNG_VTY_PORT;
  95
  96 /* Master of threads. */
  97 struct thread_master *master;
  98
  99 /* Process ID saved for use by init system */
 100 const char *pid_file = PATH_RIPNGD_PID;
 101
 102 /* Help information display. */
 103 static void
 104 usage (char *progname, int status)
 105 {
 106   if (status != 0)
 107     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 108   else
 109     {
 110       printf ("Usage : %s [OPTION...]\n\
 111 Daemon which manages RIPng.\n\n\
 112 -d, --daemon       Runs in daemon mode\n\
 113 -f, --config_file  Set configuration file name\n\
 114 -i, --pid_file     Set process identifier file name\n\
 115 -A, --vty_addr     Set vty's bind address\n\
 116 -P, --vty_port     Set vty's port number\n\
 117 -r, --retain       When program terminates, retain added route by ripngd.\n\
 118 -u, --user         User to run as\n\
 119 -g, --group        Group to run as\n\
 120 -v, --version      Print program version\n\
 121 -C, --dryrun       Check configuration for validity and exit\n\
 122 -h, --help         Display this help and exit\n\
 123 \n\
 124 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 125     }
 126   exit (status);
 127 }
 128 \f
 129 /* SIGHUP handler. */
 130 static void
 131 sighup (void)
 132 {
 133   zlog_info ("SIGHUP received");
 134   ripng_clean ();
 135   ripng_reset ();
 136
 137   /* Reload config file. */
 138   vty_read_config (config_file, config_default);
 139   /* Create VTY's socket */
 140   vty_serv_sock (vty_addr, vty_port, RIPNG_VTYSH_PATH);
 141
 142   /* Try to return to normal operation. */
 143 }
 144
 145 /* SIGINT handler. */
 146 static void
 147 sigint (void)
 148 {
 149   zlog_notice ("Terminating on signal");
 150
 151   if (! retain_mode)
 152     ripng_clean ();
 153
 154   exit (0);
 155 }
 156
 157 /* SIGUSR1 handler. */
 158 static void
 159 sigusr1 (void)
 160 {
 161   zlog_rotate (NULL);
 162 }
 163
 164 struct quagga_signal_t ripng_signals[] =
 165 {
 166   {
 167     .signal = SIGHUP,
 168     .handler = &sighup,
 169   },
 170   {
 171     .signal = SIGUSR1,
 172     .handler = &sigusr1,
 173   },
 174   {
 175     .signal = SIGINT,
 176     .handler = &sigint,
 177   },
 178   {
 179     .signal = SIGTERM,
 180     .handler = &sigint,
 181   },
 182 };
 183 \f
 184 /* RIPngd main routine. */
 185 int
 186 main (int argc, char **argv)
 187 {
 188   char *p;
 189   int vty_port = RIPNG_VTY_PORT;
 190   int daemon_mode = 0;
 191   char *progname;
 192   struct thread thread;
 193   int dryrun = 0;
 194
 195   /* Set umask before anything for security */
 196   umask (0027);
 197
 198   /* get program name */
 199   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 200
 201   zlog_default = openzlog(progname, ZLOG_RIPNG,
 202                           LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 203
 204   while (1)
 205     {
 206       int opt;
 207
 208       opt = getopt_long (argc, argv, "df:i:hA:P:u:g:vC", longopts, 0);
 209
 210       if (opt == EOF)
 211         break;
 212
 213       switch (opt)
 214         {
 215         case 0:
 216           break;
 217         case 'd':
 218           daemon_mode = 1;
 219           break;
 220         case 'f':
 221           config_file = optarg;
 222           break;
 223         case 'A':
 224           vty_addr = optarg;
 225           break;
 226         case 'i':
 227           pid_file = optarg;
 228           break;
 229         case 'P':
 230           /* Deal with atoi() returning 0 on failure, and ripngd not
 231              listening on ripngd port... */
 232           if (strcmp(optarg, "0") == 0)
 233             {
 234               vty_port = 0;
 235               break;
 236             }
 237           vty_port = atoi (optarg);
 238           if (vty_port <= 0 || vty_port > 0xffff)
 239             vty_port = RIPNG_VTY_PORT;
 240           break;
 241         case 'r':
 242           retain_mode = 1;
 243           break;
 244         case 'u':
 245           ripngd_privs.user = optarg;
 246           break;
 247         case 'g':
 248           ripngd_privs.group = optarg;
 249           break;
 250         case 'v':
 251           print_version (progname);
 252           exit (0);
 253           break;
 254         case 'C':
 255           dryrun = 1;
 256           break;
 257         case 'h':
 258           usage (progname, 0);
 259           break;
 260         default:
 261           usage (progname, 1);
 262           break;
 263         }
 264     }
 265
 266   master = thread_master_create ();
 267
 268   /* Library inits. */
 269   zprivs_init (&ripngd_privs);
 270   signal_init (master, Q_SIGC(ripng_signals), ripng_signals);
 271   cmd_init (1);
 272   vty_init (master);
 273   memory_init ();
 274
 275   /* RIPngd inits. */
 276   ripng_init ();
 277   zebra_init ();
 278   ripng_peer_init ();
 279
 280   /* Sort all installed commands. */
 281   sort_node ();
 282
 283   /* Get configuration file. */
 284   vty_read_config (config_file, config_default);
 285
 286   /* Start execution only if not in dry-run mode */
 287   if(dryrun)
 288     return(0);
 289
 290   /* Change to the daemon program. */
 291   if (daemon_mode && daemon (0, 0) < 0)
 292     {
 293       zlog_err("RIPNGd daemon failed: %s", strerror(errno));
 294       exit (1);
 295     }
 296
 297   /* Create VTY socket */
 298   vty_serv_sock (vty_addr, vty_port, RIPNG_VTYSH_PATH);
 299
 300   /* Process id file create. */
 301   pid_output (pid_file);
 302
 303   /* Print banner. */
 304   zlog_notice ("RIPNGd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
 305
 306   /* Fetch next active thread. */
 307   while (thread_fetch (master, &thread))
 308     thread_call (&thread);
 309
 310   /* Not reached. */
 311   return 0;
 312 }