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