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 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 "thread.h"
  27 #include "prefix.h"
  28 #include "linklist.h"
  29 #include "if.h"
  30 #include "vector.h"
  31 #include "vty.h"
  32 #include "command.h"
  33 #include "filter.h"
  34 #include "plist.h"
  35 #include "stream.h"
  36 #include "log.h"
  37 #include "memory.h"
  38 #include "privs.h"
  39 #include "sigevent.h"
  40 #include "zclient.h"
  41 #include "vrf.h"
  42 #include "libfrr.h"
  43 #include "routemap.h"
  44
  45 #include "ospfd/ospfd.h"
  46 #include "ospfd/ospf_interface.h"
  47 #include "ospfd/ospf_asbr.h"
  48 #include "ospfd/ospf_lsa.h"
  49 #include "ospfd/ospf_lsdb.h"
  50 #include "ospfd/ospf_neighbor.h"
  51 #include "ospfd/ospf_dump.h"
  52 #include "ospfd/ospf_route.h"
  53 #include "ospfd/ospf_zebra.h"
  54 #include "ospfd/ospf_vty.h"
  55 #include "ospfd/ospf_bfd.h"
  56 #include "ospfd/ospf_errors.h"
  57 #include "ospfd/ospf_ldp_sync.h"
  58
  59 /* ospfd privileges */
  60 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_NET_ADMIN,
  61                                   ZCAP_SYS_ADMIN};
  62
  63 struct zebra_privs_t ospfd_privs = {
  64 #if defined(FRR_USER) && defined(FRR_GROUP)
  65         .user = FRR_USER,
  66         .group = FRR_GROUP,
  67 #endif
  68 #if defined(VTY_GROUP)
  69         .vty_group = VTY_GROUP,
  70 #endif
  71         .caps_p = _caps_p,
  72         .cap_num_p = array_size(_caps_p),
  73         .cap_num_i = 0};
  74
  75 /* OSPFd options. */
  76 const struct option longopts[] = {
  77         {"instance", required_argument, NULL, 'n'},
  78         {"apiserver", no_argument, NULL, 'a'},
  79         {0}
  80 };
  81
  82 /* OSPFd program name */
  83
  84 /* Master of threads. */
  85 struct thread_master *master;
  86
  87 #ifdef SUPPORT_OSPF_API
  88 extern int ospf_apiserver_enable;
  89 #endif /* SUPPORT_OSPF_API */
  90
  91 /* SIGHUP handler. */
  92 static void sighup(void)
  93 {
  94         zlog_info("SIGHUP received");
  95 }
  96
  97 /* SIGINT / SIGTERM handler. */
  98 static void sigint(void)
  99 {
 100         zlog_notice("Terminating on signal");
 101         ospf_terminate();
 102         exit(0);
 103 }
 104
 105 /* SIGUSR1 handler. */
 106 static void sigusr1(void)
 107 {
 108         zlog_rotate();
 109 }
 110
 111 struct quagga_signal_t ospf_signals[] = {
 112         {
 113                 .signal = SIGHUP,
 114                 .handler = &sighup,
 115         },
 116         {
 117                 .signal = SIGUSR1,
 118                 .handler = &sigusr1,
 119         },
 120         {
 121                 .signal = SIGINT,
 122                 .handler = &sigint,
 123         },
 124         {
 125                 .signal = SIGTERM,
 126                 .handler = &sigint,
 127         },
 128 };
 129
 130 static const struct frr_yang_module_info *const ospfd_yang_modules[] = {
 131         &frr_filter_info,
 132         &frr_interface_info,
 133         &frr_route_map_info,
 134         &frr_vrf_info,
 135 };
 136
 137 FRR_DAEMON_INFO(ospfd, OSPF, .vty_port = OSPF_VTY_PORT,
 138
 139                 .proghelp = "Implementation of the OSPFv2 routing protocol.",
 140
 141                 .signals = ospf_signals, .n_signals = array_size(ospf_signals),
 142
 143                 .privs = &ospfd_privs, .yang_modules = ospfd_yang_modules,
 144                 .n_yang_modules = array_size(ospfd_yang_modules), )
 145
 146 /* OSPFd main routine. */
 147 int main(int argc, char **argv)
 148 {
 149         unsigned short instance = 0;
 150         bool created = false;
 151
 152 #ifdef SUPPORT_OSPF_API
 153         /* OSPF apiserver is disabled by default. */
 154         ospf_apiserver_enable = 0;
 155 #endif /* SUPPORT_OSPF_API */
 156
 157         frr_preinit(&ospfd_di, argc, argv);
 158         frr_opt_add("n:a", longopts,
 159                     "  -n, --instance     Set the instance id\n"
 160                     "  -a, --apiserver    Enable OSPF apiserver\n");
 161
 162         while (1) {
 163                 int opt;
 164
 165                 opt = frr_getopt(argc, argv, NULL);
 166
 167                 if (opt == EOF)
 168                         break;
 169
 170                 switch (opt) {
 171                 case 'n':
 172                         ospfd_di.instance = instance = atoi(optarg);
 173                         if (instance < 1)
 174                                 exit(0);
 175                         break;
 176                 case 0:
 177                         break;
 178 #ifdef SUPPORT_OSPF_API
 179                 case 'a':
 180                         ospf_apiserver_enable = 1;
 181                         break;
 182 #endif /* SUPPORT_OSPF_API */
 183                 default:
 184                         frr_help_exit(1);
 185                         break;
 186                 }
 187         }
 188
 189         /* Invoked by a priviledged user? -- endo. */
 190         if (geteuid() != 0) {
 191                 errno = EPERM;
 192                 perror(ospfd_di.progname);
 193                 exit(1);
 194         }
 195
 196         /* OSPF master init. */
 197         ospf_master_init(frr_init());
 198
 199         /* Initializations. */
 200         master = om->master;
 201
 202         /* Library inits. */
 203         ospf_debug_init();
 204         ospf_vrf_init();
 205
 206         access_list_init();
 207         prefix_list_init();
 208
 209         /* OSPFd inits. */
 210         ospf_if_init();
 211         ospf_zebra_init(master, instance);
 212
 213         /* OSPF vty inits. */
 214         ospf_vty_init();
 215         ospf_vty_show_init();
 216         ospf_vty_clear_init();
 217
 218         /* OSPF BFD init */
 219         ospf_bfd_init();
 220
 221         /* OSPF LDP IGP Sync init */
 222         ospf_ldp_sync_init();
 223
 224         ospf_route_map_init();
 225         ospf_opaque_init();
 226
 227         /* OSPF errors init */
 228         ospf_error_init();
 229
 230         /*
 231          * Need to initialize the default ospf structure, so the interface mode
 232          * commands can be duly processed if they are received before 'router
 233          * ospf',  when ospfd is restarted
 234          */
 235         if (instance && !ospf_get_instance(instance, &created)) {
 236                 flog_err(EC_OSPF_INIT_FAIL, "OSPF instance init failed: %s",
 237                          strerror(errno));
 238                 exit(1);
 239         }
 240
 241         frr_config_fork();
 242         frr_run(master);
 243
 244         /* Not reached. */
 245         return 0;
 246 }