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 along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include <lib/version.h>
  25 #include "getopt.h"
  26 #include "vector.h"
  27 #include "vty.h"
  28 #include "command.h"
  29 #include "memory.h"
  30 #include "memory_vty.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 #include "vrf.h"
  38 #include "libfrr.h"
  39
  40 #include "ripngd/ripngd.h"
  41
  42 /* RIPngd options. */
  43 struct option longopts[] =
  44 {
  45   { "retain",      no_argument,       NULL, 'r'},
  46   { 0 }
  47 };
  48
  49 /* ripngd privileges */
  50 zebra_capabilities_t _caps_p [] =
  51 {
  52   ZCAP_NET_RAW,
  53   ZCAP_BIND
  54 };
  55
  56 struct zebra_privs_t ripngd_privs =
  57 {
  58 #if defined(FRR_USER)
  59   .user = FRR_USER,
  60 #endif
  61 #if defined FRR_GROUP
  62   .group = FRR_GROUP,
  63 #endif
  64 #ifdef VTY_GROUP
  65   .vty_group = VTY_GROUP,
  66 #endif
  67   .caps_p = _caps_p,
  68   .cap_num_p = 2,
  69   .cap_num_i = 0
  70 };
  71
  72
  73 /* RIPngd program name */
  74
  75 /* Route retain mode flag. */
  76 int retain_mode = 0;
  77
  78 /* Master of threads. */
  79 struct thread_master *master;
  80
  81 static struct frr_daemon_info ripngd_di;
  82
  83 /* SIGHUP handler. */
  84 static void
  85 sighup (void)
  86 {
  87   zlog_info ("SIGHUP received");
  88   ripng_clean ();
  89   ripng_reset ();
  90
  91   /* Reload config file. */
  92   vty_read_config (ripngd_di.config_file, config_default);
  93
  94   /* Try to return to normal operation. */
  95 }
  96
  97 /* SIGINT handler. */
  98 static void
  99 sigint (void)
 100 {
 101   zlog_notice ("Terminating on signal");
 102
 103   if (! retain_mode)
 104     ripng_clean ();
 105
 106   exit (0);
 107 }
 108
 109 /* SIGUSR1 handler. */
 110 static void
 111 sigusr1 (void)
 112 {
 113   zlog_rotate();
 114 }
 115
 116 struct quagga_signal_t ripng_signals[] =
 117 {
 118   {
 119     .signal = SIGHUP,
 120     .handler = &sighup,
 121   },
 122   {
 123     .signal = SIGUSR1,
 124     .handler = &sigusr1,
 125   },
 126   {
 127     .signal = SIGINT,
 128     .handler = &sigint,
 129   },
 130   {
 131     .signal = SIGTERM,
 132     .handler = &sigint,
 133   },
 134 };
 135
 136 FRR_DAEMON_INFO(ripngd, RIPNG,
 137         .vty_port = RIPNG_VTY_PORT,
 138
 139         .proghelp = "Implementation of the RIPng routing protocol.",
 140
 141         .signals = ripng_signals,
 142         .n_signals = array_size(ripng_signals),
 143
 144         .privs = &ripngd_privs,
 145 )
 146
 147 /* RIPngd main routine. */
 148 int
 149 main (int argc, char **argv)
 150 {
 151   frr_preinit (&ripngd_di, argc, argv);
 152   frr_opt_add ("r", longopts,
 153         "  -r, --retain       When program terminates, retain added route by ripd.\n");
 154
 155   while (1)
 156     {
 157       int opt;
 158
 159       opt = frr_getopt (argc, argv, NULL);
 160
 161       if (opt == EOF)
 162         break;
 163
 164       switch (opt)
 165         {
 166         case 0:
 167           break;
 168         case 'r':
 169           retain_mode = 1;
 170           break;
 171         default:
 172           frr_help_exit (1);
 173           break;
 174         }
 175     }
 176
 177   master = frr_init ();
 178
 179   /* Library inits. */
 180   vrf_init (NULL, NULL, NULL, NULL);
 181
 182   /* RIPngd inits. */
 183   ripng_init ();
 184   zebra_init(master);
 185   ripng_peer_init ();
 186
 187   frr_config_fork ();
 188   frr_run (master);
 189
 190   /* Not reached. */
 191   return 0;
 192 }