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 "memory_vty.h"
  32 #include "thread.h"
  33 #include "log.h"
  34 #include "prefix.h"
  35 #include "if.h"
  36 #include "privs.h"
  37 #include "sigevent.h"
  38 #include "vrf.h"
  39 #include "libfrr.h"
  40
  41 #include "ripngd/ripngd.h"
  42
  43 /* RIPngd options. */
  44 struct option longopts[] =
  45 {
  46   { "retain",      no_argument,       NULL, 'r'},
  47   { 0 }
  48 };
  49
  50 /* ripngd privileges */
  51 zebra_capabilities_t _caps_p [] =
  52 {
  53   ZCAP_NET_RAW,
  54   ZCAP_BIND
  55 };
  56
  57 struct zebra_privs_t ripngd_privs =
  58 {
  59 #if defined(FRR_USER)
  60   .user = FRR_USER,
  61 #endif
  62 #if defined FRR_GROUP
  63   .group = FRR_GROUP,
  64 #endif
  65 #ifdef VTY_GROUP
  66   .vty_group = VTY_GROUP,
  67 #endif
  68   .caps_p = _caps_p,
  69   .cap_num_p = 2,
  70   .cap_num_i = 0
  71 };
  72
  73
  74 /* RIPngd program name */
  75
  76 /* Route retain mode flag. */
  77 int retain_mode = 0;
  78
  79 /* Master of threads. */
  80 struct thread_master *master;
  81
  82 static struct frr_daemon_info ripngd_di;
  83
  84 /* SIGHUP handler. */
  85 static void
  86 sighup (void)
  87 {
  88   zlog_info ("SIGHUP received");
  89   ripng_clean ();
  90   ripng_reset ();
  91
  92   /* Reload config file. */
  93   vty_read_config (ripngd_di.config_file, config_default);
  94
  95   /* Try to return to normal operation. */
  96 }
  97
  98 /* SIGINT handler. */
  99 static void
 100 sigint (void)
 101 {
 102   zlog_notice ("Terminating on signal");
 103
 104   if (! retain_mode)
 105     ripng_clean ();
 106
 107   exit (0);
 108 }
 109
 110 /* SIGUSR1 handler. */
 111 static void
 112 sigusr1 (void)
 113 {
 114   zlog_rotate();
 115 }
 116
 117 struct quagga_signal_t ripng_signals[] =
 118 {
 119   {
 120     .signal = SIGHUP,
 121     .handler = &sighup,
 122   },
 123   {
 124     .signal = SIGUSR1,
 125     .handler = &sigusr1,
 126   },
 127   {
 128     .signal = SIGINT,
 129     .handler = &sigint,
 130   },
 131   {
 132     .signal = SIGTERM,
 133     .handler = &sigint,
 134   },
 135 };
 136
 137 FRR_DAEMON_INFO(ripngd, RIPNG,
 138         .vty_port = RIPNG_VTY_PORT,
 139
 140         .proghelp = "Implementation of the RIPng routing protocol.",
 141
 142         .signals = ripng_signals,
 143         .n_signals = array_size(ripng_signals),
 144
 145         .privs = &ripngd_privs,
 146 )
 147
 148 /* RIPngd main routine. */
 149 int
 150 main (int argc, char **argv)
 151 {
 152   frr_preinit (&ripngd_di, argc, argv);
 153   frr_opt_add ("r", longopts,
 154         "  -r, --retain       When program terminates, retain added route by ripd.\n");
 155
 156   while (1)
 157     {
 158       int opt;
 159
 160       opt = frr_getopt (argc, argv, NULL);
 161
 162       if (opt == EOF)
 163         break;
 164
 165       switch (opt)
 166         {
 167         case 0:
 168           break;
 169         case 'r':
 170           retain_mode = 1;
 171           break;
 172         default:
 173           frr_help_exit (1);
 174           break;
 175         }
 176     }
 177
 178   master = frr_init ();
 179
 180   /* Library inits. */
 181   vrf_init ();
 182
 183   /* RIPngd inits. */
 184   ripng_init ();
 185   zebra_init(master);
 186   ripng_peer_init ();
 187
 188   frr_config_fork ();
 189   frr_run (master);
 190
 191   /* Not reached. */
 192   return 0;
 193 }