ospf6d/ospf6_main.c

   1 /*
   2  * Copyright (C) 1999 Yasuhiro Ohara
   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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22 #include <lib/version.h>
  23 #include <stdlib.h>
  24
  25 #include "getopt.h"
  26 #include "thread.h"
  27 #include "log.h"
  28 #include "command.h"
  29 #include "vty.h"
  30 #include "memory.h"
  31 #include "memory_vty.h"
  32 #include "if.h"
  33 #include "filter.h"
  34 #include "prefix.h"
  35 #include "plist.h"
  36 #include "privs.h"
  37 #include "sigevent.h"
  38 #include "zclient.h"
  39 #include "vrf.h"
  40 #include "bfd.h"
  41 #include "libfrr.h"
  42
  43 #include "ospf6d.h"
  44 #include "ospf6_top.h"
  45 #include "ospf6_message.h"
  46 #include "ospf6_asbr.h"
  47 #include "ospf6_lsa.h"
  48 #include "ospf6_interface.h"
  49 #include "ospf6_zebra.h"
  50
  51 /* Default configuration file name for ospf6d. */
  52 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  53
  54 /* Default port values. */
  55 #define OSPF6_VTY_PORT             2606
  56
  57 /* ospf6d privileges */
  58 zebra_capabilities_t _caps_p [] =
  59 {
  60   ZCAP_NET_RAW,
  61   ZCAP_BIND
  62 };
  63
  64 struct zebra_privs_t ospf6d_privs =
  65 {
  66 #if defined(FRR_USER)
  67   .user = FRR_USER,
  68 #endif
  69 #if defined FRR_GROUP
  70   .group = FRR_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 /* ospf6d options, we use GNU getopt library. */
  81 struct option longopts[] =
  82 {
  83   { 0 }
  84 };
  85
  86 /* Master of threads. */
  87 struct thread_master *master;
  88
  89 static void __attribute__ ((noreturn))
  90 ospf6_exit (int status)
  91 {
  92   struct listnode *node;
  93   struct interface *ifp;
  94
  95   if (ospf6)
  96     ospf6_delete (ospf6);
  97
  98   bfd_gbl_exit();
  99
 100   for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp))
 101     if (ifp->info != NULL)
 102       ospf6_interface_delete(ifp->info);
 103
 104   ospf6_message_terminate ();
 105   ospf6_asbr_terminate ();
 106   ospf6_lsa_terminate ();
 107
 108   vrf_terminate ();
 109   vty_terminate ();
 110   cmd_terminate ();
 111
 112   if (zclient)
 113     {
 114       zclient_stop (zclient);
 115       zclient_free (zclient);
 116     }
 117
 118   if (master)
 119     thread_master_free (master);
 120
 121   closezlog ();
 122
 123   exit (status);
 124 }
 125
 126 /* SIGHUP handler. */
 127 static void
 128 sighup (void)
 129 {
 130   zlog_info ("SIGHUP received");
 131 }
 132
 133 /* SIGINT handler. */
 134 static void
 135 sigint (void)
 136 {
 137   zlog_notice ("Terminating on signal SIGINT");
 138   ospf6_exit (0);
 139 }
 140
 141 /* SIGTERM handler. */
 142 static void
 143 sigterm (void)
 144 {
 145   zlog_notice ("Terminating on signal SIGTERM");
 146   ospf6_clean();
 147   ospf6_exit (0);
 148 }
 149
 150 /* SIGUSR1 handler. */
 151 static void
 152 sigusr1 (void)
 153 {
 154   zlog_info ("SIGUSR1 received");
 155   zlog_rotate();
 156 }
 157
 158 struct quagga_signal_t ospf6_signals[] =
 159 {
 160   {
 161     .signal = SIGHUP,
 162     .handler = &sighup,
 163   },
 164   {
 165     .signal = SIGINT,
 166     .handler = &sigint,
 167   },
 168   {
 169     .signal = SIGTERM,
 170     .handler = &sigterm,
 171   },
 172   {
 173     .signal = SIGUSR1,
 174     .handler = &sigusr1,
 175   },
 176 };
 177
 178 FRR_DAEMON_INFO(ospf6d, OSPF6,
 179         .vty_port = OSPF6_VTY_PORT,
 180
 181         .proghelp = "Implementation of the OSPFv3 routing protocol.",
 182
 183         .signals = ospf6_signals,
 184         .n_signals = array_size(ospf6_signals),
 185
 186         .privs = &ospf6d_privs,
 187 )
 188
 189 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 190    state machine is handled here. */
 191 int
 192 main (int argc, char *argv[], char *envp[])
 193 {
 194   int opt;
 195
 196   frr_preinit (&ospf6d_di, argc, argv);
 197   frr_opt_add ("", longopts, "");
 198
 199   /* Command line argument treatment. */
 200   while (1)
 201     {
 202       opt = frr_getopt (argc, argv, NULL);
 203
 204       if (opt == EOF)
 205         break;
 206
 207       switch (opt)
 208         {
 209         case 0:
 210           break;
 211         default:
 212           frr_help_exit (1);
 213           break;
 214         }
 215     }
 216
 217   if (geteuid () != 0)
 218     {
 219       errno = EPERM;
 220       perror (ospf6d_di.progname);
 221       exit (1);
 222     }
 223
 224   /* thread master */
 225   master = frr_init ();
 226
 227   vrf_init (NULL, NULL, NULL, NULL);
 228   access_list_init ();
 229   prefix_list_init ();
 230
 231   /* initialize ospf6 */
 232   ospf6_init ();
 233
 234   frr_config_fork ();
 235   frr_run (master);
 236
 237   /* Not reached. */
 238   ospf6_exit (0);
 239 }
 240
 241