ripd/rip_main.c

   1 /* RIPd main routine.
   2  * Copyright (C) 1997, 98 Kunihiro Ishiguro <kunihiro@zebra.org>
   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 Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include <lib/version.h>
  25 #include "getopt.h"
  26 #include "thread.h"
  27 #include "command.h"
  28 #include "memory.h"
  29 #include "prefix.h"
  30 #include "filter.h"
  31 #include "keychain.h"
  32 #include "log.h"
  33 #include "privs.h"
  34 #include "sigevent.h"
  35
  36 #include "ripd/ripd.h"
  37
  38 /* ripd options. */
  39 static struct option longopts[] =
  40 {
  41   { "daemon",      no_argument,       NULL, 'd'},
  42   { "config_file", required_argument, NULL, 'f'},
  43   { "pid_file",    required_argument, NULL, 'i'},
  44   { "help",        no_argument,       NULL, 'h'},
  45   { "vty_addr",    required_argument, NULL, 'A'},
  46   { "vty_port",    required_argument, NULL, 'P'},
  47   { "retain",      no_argument,       NULL, 'r'},
  48   { "user",        required_argument, NULL, 'u'},
  49   { "group",       required_argument, NULL, 'g'},
  50   { "version",     no_argument,       NULL, 'v'},
  51   { 0 }
  52 };
  53
  54 /* ripd privileges */
  55 zebra_capabilities_t _caps_p [] =
  56 {
  57   ZCAP_NET_RAW,
  58   ZCAP_BIND
  59 };
  60
  61 struct zebra_privs_t ripd_privs =
  62 {
  63 #if defined(QUAGGA_USER)
  64   .user = QUAGGA_USER,
  65 #endif
  66 #if defined QUAGGA_GROUP
  67   .group = QUAGGA_GROUP,
  68 #endif
  69 #ifdef VTY_GROUP
  70   .vty_group = VTY_GROUP,
  71 #endif
  72   .caps_p = _caps_p,
  73   .cap_num_p = 2,
  74   .cap_num_i = 0
  75 };
  76
  77 /* Configuration file and directory. */
  78 char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
  79 char *config_file = NULL;
  80
  81 /* ripd program name */
  82
  83 /* Route retain mode flag. */
  84 int retain_mode = 0;
  85
  86 /* RIP VTY bind address. */
  87 char *vty_addr = NULL;
  88
  89 /* RIP VTY connection port. */
  90 int vty_port = RIP_VTY_PORT;
  91
  92 /* Master of threads. */
  93 struct thread_master *master;
  94
  95 /* Process ID saved for use by init system */
  96 const char *pid_file = PATH_RIPD_PID;
  97
  98 /* Help information display. */
  99 static void
 100 usage (char *progname, int status)
 101 {
 102   if (status != 0)
 103     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 104   else
 105     {
 106       printf ("Usage : %s [OPTION...]\n\
 107 Daemon which manages RIP version 1 and 2.\n\n\
 108 -d, --daemon       Runs in daemon mode\n\
 109 -f, --config_file  Set configuration file name\n\
 110 -i, --pid_file     Set process identifier file name\n\
 111 -A, --vty_addr     Set vty's bind address\n\
 112 -P, --vty_port     Set vty's port number\n\
 113 -r, --retain       When program terminates, retain added route by ripd.\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 %s\n", progname, ZEBRA_BUG_ADDRESS);
 120     }
 121
 122   exit (status);
 123 }
 124 \f
 125 /* SIGHUP handler. */
 126 void
 127 sighup (void)
 128 {
 129   zlog_info ("SIGHUP received");
 130   rip_clean ();
 131   rip_reset ();
 132   zlog_info ("ripd restarting!");
 133
 134   /* Reload config file. */
 135   vty_read_config (config_file, config_default);
 136
 137   /* Create VTY's socket */
 138   vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
 139
 140   /* Try to return to normal operation. */
 141 }
 142
 143 /* SIGINT handler. */
 144 void
 145 sigint (void)
 146 {
 147   zlog_notice ("Terminating on signal");
 148
 149   if (! retain_mode)
 150     rip_clean ();
 151
 152   exit (0);
 153 }
 154
 155 /* SIGUSR1 handler. */
 156 void
 157 sigusr1 (void)
 158 {
 159   zlog_rotate (NULL);
 160 }
 161
 162 struct quagga_signal_t ripd_signals[] =
 163 {
 164   {
 165     .signal = SIGHUP,
 166     .handler = &sighup,
 167   },
 168   {
 169     .signal = SIGUSR1,
 170     .handler = &sigusr1,
 171   },
 172   {
 173     .signal = SIGINT,
 174     .handler = &sigint,
 175   },
 176   {
 177     .signal = SIGTERM,
 178     .handler = &sigint,
 179   },
 180 };
 181 \f
 182 /* Main routine of ripd. */
 183 int
 184 main (int argc, char **argv)
 185 {
 186   char *p;
 187   int daemon_mode = 0;
 188   char *progname;
 189   struct thread thread;
 190
 191   /* Set umask before anything for security */
 192   umask (0027);
 193
 194   /* Get program name. */
 195   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 196
 197   /* First of all we need logging init. */
 198   zlog_default = openzlog (progname, ZLOG_RIP,
 199                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 200
 201   /* Command line option parse. */
 202   while (1)
 203     {
 204       int opt;
 205
 206       opt = getopt_long (argc, argv, "df:i:hA:P:u:g:rv", longopts, 0);
 207
 208       if (opt == EOF)
 209         break;
 210
 211       switch (opt)
 212         {
 213         case 0:
 214           break;
 215         case 'd':
 216           daemon_mode = 1;
 217           break;
 218         case 'f':
 219           config_file = optarg;
 220           break;
 221         case 'A':
 222           vty_addr = optarg;
 223           break;
 224         case 'i':
 225           pid_file = optarg;
 226           break;
 227         case 'P':
 228           /* Deal with atoi() returning 0 on failure, and ripd not
 229              listening on rip port... */
 230           if (strcmp(optarg, "0") == 0)
 231             {
 232               vty_port = 0;
 233               break;
 234             }
 235           vty_port = atoi (optarg);
 236           vty_port = (vty_port ? vty_port : RIP_VTY_PORT);
 237           break;
 238         case 'r':
 239           retain_mode = 1;
 240           break;
 241         case 'u':
 242           ripd_privs.user = optarg;
 243           break;
 244         case 'g':
 245           ripd_privs.group = optarg;
 246           break;
 247         case 'v':
 248           print_version (progname);
 249           exit (0);
 250           break;
 251         case 'h':
 252           usage (progname, 0);
 253           break;
 254         default:
 255           usage (progname, 1);
 256           break;
 257         }
 258     }
 259
 260   /* Prepare master thread. */
 261   master = thread_master_create ();
 262
 263   /* Library initialization. */
 264   zprivs_init (&ripd_privs);
 265   signal_init (master, Q_SIGC(ripd_signals), ripd_signals);
 266   cmd_init (1);
 267   vty_init (master);
 268   memory_init ();
 269   keychain_init ();
 270
 271   /* RIP related initialization. */
 272   rip_init ();
 273   rip_if_init ();
 274   rip_zclient_init ();
 275   rip_peer_init ();
 276
 277   /* Sort all installed commands. */
 278   sort_node ();
 279
 280   /* Get configuration file. */
 281   vty_read_config (config_file, config_default);
 282
 283   /* Change to the daemon program. */
 284   if (daemon_mode)
 285     daemon (0, 0);
 286
 287   /* Pid file create. */
 288   pid_output (pid_file);
 289
 290   /* Create VTY's socket */
 291   vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
 292
 293   /* Print banner. */
 294   zlog_notice ("RIPd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
 295
 296   /* Execute each thread. */
 297   while (thread_fetch (master, &thread))
 298     thread_call (&thread);
 299
 300   /* Not reached. */
 301   exit (0);
 302 }