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     zclient_free (zclient);
 114
 115   if (master)
 116     thread_master_free (master);
 117
 118   closezlog ();
 119
 120   exit (status);
 121 }
 122
 123 /* SIGHUP handler. */
 124 static void
 125 sighup (void)
 126 {
 127   zlog_info ("SIGHUP received");
 128 }
 129
 130 /* SIGINT handler. */
 131 static void
 132 sigint (void)
 133 {
 134   zlog_notice ("Terminating on signal SIGINT");
 135   ospf6_exit (0);
 136 }
 137
 138 /* SIGTERM handler. */
 139 static void
 140 sigterm (void)
 141 {
 142   zlog_notice ("Terminating on signal SIGTERM");
 143   ospf6_clean();
 144   ospf6_exit (0);
 145 }
 146
 147 /* SIGUSR1 handler. */
 148 static void
 149 sigusr1 (void)
 150 {
 151   zlog_info ("SIGUSR1 received");
 152   zlog_rotate();
 153 }
 154
 155 struct quagga_signal_t ospf6_signals[] =
 156 {
 157   {
 158     .signal = SIGHUP,
 159     .handler = &sighup,
 160   },
 161   {
 162     .signal = SIGINT,
 163     .handler = &sigint,
 164   },
 165   {
 166     .signal = SIGTERM,
 167     .handler = &sigterm,
 168   },
 169   {
 170     .signal = SIGUSR1,
 171     .handler = &sigusr1,
 172   },
 173 };
 174
 175 FRR_DAEMON_INFO(ospf6d, OSPF6,
 176         .vty_port = OSPF6_VTY_PORT,
 177
 178         .proghelp = "Implementation of the OSPFv3 routing protocol.",
 179
 180         .signals = ospf6_signals,
 181         .n_signals = array_size(ospf6_signals),
 182
 183         .privs = &ospf6d_privs,
 184 )
 185
 186 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 187    state machine is handled here. */
 188 int
 189 main (int argc, char *argv[], char *envp[])
 190 {
 191   int opt;
 192
 193   frr_preinit (&ospf6d_di, argc, argv);
 194   frr_opt_add ("", longopts, "");
 195
 196   /* Command line argument treatment. */
 197   while (1)
 198     {
 199       opt = frr_getopt (argc, argv, NULL);
 200
 201       if (opt == EOF)
 202         break;
 203
 204       switch (opt)
 205         {
 206         case 0:
 207           break;
 208         default:
 209           frr_help_exit (1);
 210           break;
 211         }
 212     }
 213
 214   if (geteuid () != 0)
 215     {
 216       errno = EPERM;
 217       perror (ospf6d_di.progname);
 218       exit (1);
 219     }
 220
 221   /* thread master */
 222   master = frr_init ();
 223
 224   vrf_init (NULL, NULL, NULL, NULL);
 225   access_list_init ();
 226   prefix_list_init ();
 227
 228   /* initialize ospf6 */
 229   ospf6_init ();
 230
 231   frr_config_fork ();
 232   frr_run (master);
 233
 234   /* Not reached. */
 235   ospf6_exit (0);
 236 }
 237
 238