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