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   { "dryrun",      no_argument,       NULL, 'C'},
  46   { "vty_addr",    required_argument, NULL, 'A'},
  47   { "vty_port",    required_argument, NULL, 'P'},
  48   { "retain",      no_argument,       NULL, 'r'},
  49   { "user",        required_argument, NULL, 'u'},
  50   { "group",       required_argument, NULL, 'g'},
  51   { "version",     no_argument,       NULL, 'v'},
  52   { 0 }
  53 };
  54
  55 /* ripd privileges */
  56 zebra_capabilities_t _caps_p [] =
  57 {
  58   ZCAP_NET_RAW,
  59   ZCAP_BIND
  60 };
  61
  62 struct zebra_privs_t ripd_privs =
  63 {
  64 #if defined(QUAGGA_USER)
  65   .user = QUAGGA_USER,
  66 #endif
  67 #if defined QUAGGA_GROUP
  68   .group = QUAGGA_GROUP,
  69 #endif
  70 #ifdef VTY_GROUP
  71   .vty_group = VTY_GROUP,
  72 #endif
  73   .caps_p = _caps_p,
  74   .cap_num_p = 2,
  75   .cap_num_i = 0
  76 };
  77
  78 /* Configuration file and directory. */
  79 char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
  80 char *config_file = NULL;
  81
  82 /* ripd program name */
  83
  84 /* Route retain mode flag. */
  85 int retain_mode = 0;
  86
  87 /* RIP VTY bind address. */
  88 char *vty_addr = NULL;
  89
  90 /* RIP VTY connection port. */
  91 int vty_port = RIP_VTY_PORT;
  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_RIPD_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\
 108 Daemon which manages RIP version 1 and 2.\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 -C, --dryrun       Check configuration for validity and exit\n\
 115 -r, --retain       When program terminates, retain added route by ripd.\n\
 116 -u, --user         User to run as\n\
 117 -g, --group        Group to run as\n\
 118 -v, --version      Print program version\n\
 119 -h, --help         Display this help and exit\n\
 120 \n\
 121 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 122     }
 123
 124   exit (status);
 125 }
 126 \f
 127 /* SIGHUP handler. */
 128 static void
 129 sighup (void)
 130 {
 131   zlog_info ("SIGHUP received");
 132   rip_clean ();
 133   rip_reset ();
 134   zlog_info ("ripd restarting!");
 135
 136   /* Reload config file. */
 137   vty_read_config (config_file, config_default);
 138
 139   /* Create VTY's socket */
 140   vty_serv_sock (vty_addr, vty_port, RIP_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     rip_clean ();
 153
 154   exit (0);
 155 }
 156
 157 /* SIGUSR1 handler. */
 158 static void
 159 sigusr1 (void)
 160 {
 161   zlog_rotate (NULL);
 162 }
 163
 164 static struct quagga_signal_t ripd_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 /* Main routine of ripd. */
 185 int
 186 main (int argc, char **argv)
 187 {
 188   char *p;
 189   int daemon_mode = 0;
 190   int dryrun = 0;
 191   char *progname;
 192   struct thread thread;
 193
 194   /* Set umask before anything for security */
 195   umask (0027);
 196
 197   /* Get program name. */
 198   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 199
 200   /* First of all we need logging init. */
 201   zlog_default = openzlog (progname, ZLOG_RIP,
 202                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 203
 204   /* Command line option parse. */
 205   while (1)
 206     {
 207       int opt;
 208
 209       opt = getopt_long (argc, argv, "df:i:hA:P:u:g:rvC", longopts, 0);
 210
 211       if (opt == EOF)
 212         break;
 213
 214       switch (opt)
 215         {
 216         case 0:
 217           break;
 218         case 'd':
 219           daemon_mode = 1;
 220           break;
 221         case 'f':
 222           config_file = optarg;
 223           break;
 224         case 'A':
 225           vty_addr = optarg;
 226           break;
 227         case 'i':
 228           pid_file = optarg;
 229           break;
 230         case 'P':
 231           /* Deal with atoi() returning 0 on failure, and ripd not
 232              listening on rip port... */
 233           if (strcmp(optarg, "0") == 0)
 234             {
 235               vty_port = 0;
 236               break;
 237             }
 238           vty_port = atoi (optarg);
 239           if (vty_port <= 0 || vty_port > 0xffff)
 240             vty_port = RIP_VTY_PORT;
 241           break;
 242         case 'r':
 243           retain_mode = 1;
 244           break;
 245         case 'C':
 246           dryrun = 1;
 247           break;
 248         case 'u':
 249           ripd_privs.user = optarg;
 250           break;
 251         case 'g':
 252           ripd_privs.group = optarg;
 253           break;
 254         case 'v':
 255           print_version (progname);
 256           exit (0);
 257           break;
 258         case 'h':
 259           usage (progname, 0);
 260           break;
 261         default:
 262           usage (progname, 1);
 263           break;
 264         }
 265     }
 266
 267   /* Prepare master thread. */
 268   master = thread_master_create ();
 269
 270   /* Library initialization. */
 271   zprivs_init (&ripd_privs);
 272   signal_init (master, Q_SIGC(ripd_signals), ripd_signals);
 273   cmd_init (1);
 274   vty_init (master);
 275   memory_init ();
 276   keychain_init ();
 277
 278   /* RIP related initialization. */
 279   rip_init ();
 280   rip_if_init ();
 281   rip_zclient_init ();
 282   rip_peer_init ();
 283
 284   /* Sort all installed commands. */
 285   sort_node ();
 286
 287   /* Get configuration file. */
 288   vty_read_config (config_file, config_default);
 289
 290   /* Start execution only if not in dry-run mode */
 291   if(dryrun)
 292     return (0);
 293
 294   /* Change to the daemon program. */
 295   if (daemon_mode)
 296     daemon (0, 0);
 297
 298   /* Pid file create. */
 299   pid_output (pid_file);
 300
 301   /* Create VTY's socket */
 302   vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
 303
 304   /* Print banner. */
 305   zlog_notice ("RIPd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
 306
 307   /* Execute each thread. */
 308   while (thread_fetch (master, &thread))
 309     thread_call (&thread);
 310
 311   /* Not reached. */
 312   return (0);
 313 }