ospfd/ospf_main.c

   1 /*
   2  * OSPFd main routine.
   3  *   Copyright (C) 1998, 99 Kunihiro Ishiguro, Toshiaki Takada
   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 "thread.h"
  28 #include "prefix.h"
  29 #include "linklist.h"
  30 #include "if.h"
  31 #include "vector.h"
  32 #include "vty.h"
  33 #include "command.h"
  34 #include "filter.h"
  35 #include "plist.h"
  36 #include "stream.h"
  37 #include "log.h"
  38 #include "memory.h"
  39 #include "memory_vty.h"
  40 #include "privs.h"
  41 #include "sigevent.h"
  42 #include "zclient.h"
  43 #include "vrf.h"
  44 #include "libfrr.h"
  45
  46 #include "ospfd/ospfd.h"
  47 #include "ospfd/ospf_interface.h"
  48 #include "ospfd/ospf_asbr.h"
  49 #include "ospfd/ospf_lsa.h"
  50 #include "ospfd/ospf_lsdb.h"
  51 #include "ospfd/ospf_neighbor.h"
  52 #include "ospfd/ospf_dump.h"
  53 #include "ospfd/ospf_zebra.h"
  54 #include "ospfd/ospf_vty.h"
  55 #include "ospfd/ospf_bfd.h"
  56
  57 /* ospfd privileges */
  58 zebra_capabilities_t _caps_p [] =
  59 {
  60   ZCAP_NET_RAW,
  61   ZCAP_BIND,
  62   ZCAP_NET_ADMIN,
  63 };
  64
  65 struct zebra_privs_t ospfd_privs =
  66 {
  67 #if defined(FRR_USER) && defined(FRR_GROUP)
  68   .user = FRR_USER,
  69   .group = FRR_GROUP,
  70 #endif
  71 #if defined(VTY_GROUP)
  72   .vty_group = VTY_GROUP,
  73 #endif
  74   .caps_p = _caps_p,
  75   .cap_num_p = array_size(_caps_p),
  76   .cap_num_i = 0
  77 };
  78
  79 /* OSPFd options. */
  80 struct option longopts[] =
  81 {
  82   { "instance",    required_argument, NULL, 'n'},
  83   { "apiserver",   no_argument,       NULL, 'a'},
  84   { 0 }
  85 };
  86
  87 /* OSPFd program name */
  88
  89 /* Master of threads. */
  90 struct thread_master *master;
  91
  92 #ifdef SUPPORT_OSPF_API
  93 extern int ospf_apiserver_enable;
  94 #endif /* SUPPORT_OSPF_API */
  95
  96 /* SIGHUP handler. */
  97 static void
  98 sighup (void)
  99 {
 100   zlog_info("SIGHUP received");
 101 }
 102
 103 /* SIGINT / SIGTERM handler. */
 104 static void
 105 sigint (void)
 106 {
 107   zlog_notice ("Terminating on signal");
 108   ospf_terminate ();
 109 }
 110
 111 /* SIGUSR1 handler. */
 112 static void
 113 sigusr1 (void)
 114 {
 115   zlog_rotate();
 116 }
 117
 118 struct quagga_signal_t ospf_signals[] =
 119 {
 120   {
 121     .signal = SIGHUP,
 122     .handler = &sighup,
 123   },
 124   {
 125     .signal = SIGUSR1,
 126     .handler = &sigusr1,
 127   },
 128   {
 129     .signal = SIGINT,
 130     .handler = &sigint,
 131   },
 132   {
 133     .signal = SIGTERM,
 134     .handler = &sigint,
 135   },
 136 };
 137
 138 FRR_DAEMON_INFO(ospfd, OSPF,
 139         .vty_port = OSPF_VTY_PORT,
 140
 141         .proghelp = "Implementation of the OSPFv2 routing protocol.",
 142
 143         .signals = ospf_signals,
 144         .n_signals = array_size(ospf_signals),
 145
 146         .privs = &ospfd_privs,
 147 )
 148
 149 /* OSPFd main routine. */
 150 int
 151 main (int argc, char **argv)
 152 {
 153   u_short instance = 0;
 154
 155 #ifdef SUPPORT_OSPF_API
 156   /* OSPF apiserver is disabled by default. */
 157   ospf_apiserver_enable = 0;
 158 #endif /* SUPPORT_OSPF_API */
 159
 160   frr_preinit (&ospfd_di, argc, argv);
 161   frr_opt_add ("n:a", longopts,
 162         "  -n, --instance     Set the instance id\n"
 163         "  -a, --apiserver    Enable OSPF apiserver\n");
 164
 165   while (1)
 166     {
 167       int opt;
 168
 169       opt = frr_getopt (argc, argv, NULL);
 170
 171       if (opt == EOF)
 172         break;
 173
 174       switch (opt)
 175         {
 176         case 'n':
 177           ospfd_di.instance = instance = atoi(optarg);
 178           if (instance < 1)
 179             exit(0);
 180           break;
 181         case 0:
 182           break;
 183 #ifdef SUPPORT_OSPF_API
 184         case 'a':
 185           ospf_apiserver_enable = 1;
 186           break;
 187 #endif /* SUPPORT_OSPF_API */
 188         default:
 189           frr_help_exit (1);
 190           break;
 191         }
 192     }
 193
 194   /* Invoked by a priviledged user? -- endo. */
 195   if (geteuid () != 0)
 196     {
 197       errno = EPERM;
 198       perror (ospfd_di.progname);
 199       exit (1);
 200     }
 201
 202   /* OSPF master init. */
 203   ospf_master_init (frr_init ());
 204
 205   /* Initializations. */
 206   master = om->master;
 207
 208   /* Library inits. */
 209   debug_init ();
 210   vrf_init ();
 211
 212   access_list_init ();
 213   prefix_list_init ();
 214
 215   /* OSPFd inits. */
 216   ospf_if_init ();
 217   ospf_zebra_init(master, instance);
 218
 219   /* OSPF vty inits. */
 220   ospf_vty_init ();
 221   ospf_vty_show_init ();
 222   ospf_vty_clear_init ();
 223
 224   /* OSPF BFD init */
 225   ospf_bfd_init();
 226
 227   ospf_route_map_init ();
 228   ospf_opaque_init ();
 229
 230   /* Need to initialize the default ospf structure, so the interface mode
 231      commands can be duly processed if they are received before 'router ospf',
 232      when quagga(ospfd) is restarted */
 233   if (!ospf_get_instance(instance))
 234     {
 235       zlog_err("OSPF instance init failed: %s", strerror(errno));
 236       exit (1);
 237     }
 238
 239   frr_config_fork();
 240   frr_run (master);
 241
 242   /* Not reached. */
 243   return (0);
 244 }
 245