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 #include "zclient.h"
  36
  37 #include "ripd/ripd.h"
  38
  39 /* ripd options. */
  40 static struct option longopts[] =
  41 {
  42   { "daemon",      no_argument,       NULL, 'd'},
  43   { "config_file", required_argument, NULL, 'f'},
  44   { "pid_file",    required_argument, NULL, 'i'},
  45   { "socket",      required_argument, NULL, 'z'},
  46   { "help",        no_argument,       NULL, 'h'},
  47   { "dryrun",      no_argument,       NULL, 'C'},
  48   { "vty_addr",    required_argument, NULL, 'A'},
  49   { "vty_port",    required_argument, NULL, 'P'},
  50   { "retain",      no_argument,       NULL, 'r'},
  51   { "user",        required_argument, NULL, 'u'},
  52   { "group",       required_argument, NULL, 'g'},
  53   { "version",     no_argument,       NULL, 'v'},
  54   { 0 }
  55 };
  56
  57 /* ripd privileges */
  58 zebra_capabilities_t _caps_p [] =
  59 {
  60   ZCAP_NET_RAW,
  61   ZCAP_BIND
  62 };
  63
  64 struct zebra_privs_t ripd_privs =
  65 {
  66 #if defined(QUAGGA_USER)
  67   .user = QUAGGA_USER,
  68 #endif
  69 #if defined QUAGGA_GROUP
  70   .group = QUAGGA_GROUP,
  71 #endif
  72 #ifdef VTY_GROUP
  73   .vty_group = VTY_GROUP,
  74 #endif
  75   .caps_p = _caps_p,
  76   .cap_num_p = 2,
  77   .cap_num_i = 0
  78 };
  79
  80 /* Configuration file and directory. */
  81 char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
  82 char *config_file = NULL;
  83
  84 /* ripd program name */
  85
  86 /* Route retain mode flag. */
  87 int retain_mode = 0;
  88
  89 /* RIP VTY bind address. */
  90 char *vty_addr = NULL;
  91
  92 /* RIP VTY connection port. */
  93 int vty_port = RIP_VTY_PORT;
  94
  95 /* Master of threads. */
  96 struct thread_master *master;
  97
  98 /* Process ID saved for use by init system */
  99 const char *pid_file = PATH_RIPD_PID;
 100
 101 /* Help information display. */
 102 static void
 103 usage (char *progname, int status)
 104 {
 105   if (status != 0)
 106     fprintf (stderr, "Try `%s --help' for more information.\n", progname);
 107   else
 108     {
 109       printf ("Usage : %s [OPTION...]\n\
 110 Daemon which manages RIP version 1 and 2.\n\n\
 111 -d, --daemon       Runs in daemon mode\n\
 112 -f, --config_file  Set configuration file name\n\
 113 -i, --pid_file     Set process identifier file name\n\
 114 -z, --socket       Set path of zebra socket\n\
 115 -A, --vty_addr     Set vty's bind address\n\
 116 -P, --vty_port     Set vty's port number\n\
 117 -C, --dryrun       Check configuration for validity and exit\n\
 118 -r, --retain       When program terminates, retain added route by ripd.\n\
 119 -u, --user         User to run as\n\
 120 -g, --group        Group to run as\n\
 121 -v, --version      Print program version\n\
 122 -h, --help         Display this help and exit\n\
 123 \n\
 124 Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
 125     }
 126
 127   exit (status);
 128 }
 129 \f
 130 /* SIGHUP handler. */
 131 static void
 132 sighup (void)
 133 {
 134   zlog_info ("SIGHUP received");
 135   rip_clean ();
 136   rip_reset ();
 137   zlog_info ("ripd restarting!");
 138
 139   /* Reload config file. */
 140   vty_read_config (config_file, config_default);
 141
 142   /* Create VTY's socket */
 143   vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
 144
 145   /* Try to return to normal operation. */
 146 }
 147
 148 /* SIGINT handler. */
 149 static void
 150 sigint (void)
 151 {
 152   zlog_notice ("Terminating on signal");
 153
 154   if (! retain_mode)
 155     rip_clean ();
 156
 157   exit (0);
 158 }
 159
 160 /* SIGUSR1 handler. */
 161 static void
 162 sigusr1 (void)
 163 {
 164   zlog_rotate (NULL);
 165 }
 166
 167 static struct quagga_signal_t ripd_signals[] =
 168 {
 169   {
 170     .signal = SIGHUP,
 171     .handler = &sighup,
 172   },
 173   {
 174     .signal = SIGUSR1,
 175     .handler = &sigusr1,
 176   },
 177   {
 178     .signal = SIGINT,
 179     .handler = &sigint,
 180   },
 181   {
 182     .signal = SIGTERM,
 183     .handler = &sigint,
 184   },
 185 };
 186 \f
 187 /* Main routine of ripd. */
 188 int
 189 main (int argc, char **argv)
 190 {
 191   char *p;
 192   int daemon_mode = 0;
 193   int dryrun = 0;
 194   char *progname;
 195   struct thread thread;
 196
 197   /* Set umask before anything for security */
 198   umask (0027);
 199
 200   /* Get program name. */
 201   progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
 202
 203   /* First of all we need logging init. */
 204   zlog_default = openzlog (progname, ZLOG_RIP,
 205                            LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
 206
 207   /* Command line option parse. */
 208   while (1)
 209     {
 210       int opt;
 211
 212       opt = getopt_long (argc, argv, "df:i:z:hA:P:u:g:rvC", longopts, 0);
 213
 214       if (opt == EOF)
 215         break;
 216
 217       switch (opt)
 218         {
 219         case 0:
 220           break;
 221         case 'd':
 222           daemon_mode = 1;
 223           break;
 224         case 'f':
 225           config_file = optarg;
 226           break;
 227         case 'A':
 228           vty_addr = optarg;
 229           break;
 230         case 'i':
 231           pid_file = optarg;
 232           break;
 233         case 'z':
 234           zclient_serv_path_set (optarg);
 235           break;
 236         case 'P':
 237           /* Deal with atoi() returning 0 on failure, and ripd not
 238              listening on rip port... */
 239           if (strcmp(optarg, "0") == 0)
 240             {
 241               vty_port = 0;
 242               break;
 243             }
 244           vty_port = atoi (optarg);
 245           if (vty_port <= 0 || vty_port > 0xffff)
 246             vty_port = RIP_VTY_PORT;
 247           break;
 248         case 'r':
 249           retain_mode = 1;
 250           break;
 251         case 'C':
 252           dryrun = 1;
 253           break;
 254         case 'u':
 255           ripd_privs.user = optarg;
 256           break;
 257         case 'g':
 258           ripd_privs.group = optarg;
 259           break;
 260         case 'v':
 261           print_version (progname);
 262           exit (0);
 263           break;
 264         case 'h':
 265           usage (progname, 0);
 266           break;
 267         default:
 268           usage (progname, 1);
 269           break;
 270         }
 271     }
 272
 273   /* Prepare master thread. */
 274   master = thread_master_create ();
 275
 276   /* Library initialization. */
 277   zprivs_init (&ripd_privs);
 278   signal_init (master, array_size(ripd_signals), ripd_signals);
 279   cmd_init (1);
 280   vty_init (master);
 281   memory_init ();
 282   keychain_init ();
 283
 284   /* RIP related initialization. */
 285   rip_init ();
 286   rip_if_init ();
 287   rip_zclient_init ();
 288   rip_peer_init ();
 289
 290   /* Get configuration file. */
 291   vty_read_config (config_file, config_default);
 292
 293   /* Start execution only if not in dry-run mode */
 294   if(dryrun)
 295     return (0);
 296
 297   /* Change to the daemon program. */
 298   if (daemon_mode && daemon (0, 0) < 0)
 299     {
 300       zlog_err("RIPd daemon failed: %s", strerror(errno));
 301       exit (1);
 302     }
 303
 304   /* Pid file create. */
 305   pid_output (pid_file);
 306
 307   /* Create VTY's socket */
 308   vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
 309
 310   /* Print banner. */
 311   zlog_notice ("RIPd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
 312
 313   /* Execute each thread. */
 314   while (thread_fetch (master, &thread))
 315     thread_call (&thread);
 316
 317   /* Not reached. */
 318   return (0);
 319 }