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