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