ospf6d/ospf6_main.c

   1 /*
   2  * Copyright (C) 1999 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22 #include <lib/version.h>
  23 #include <stdlib.h>
  24
  25 #include "getopt.h"
  26 #include "thread.h"
  27 #include "log.h"
  28 #include "command.h"
  29 #include "vty.h"
  30 #include "memory.h"
  31 #include "memory_vty.h"
  32 #include "if.h"
  33 #include "filter.h"
  34 #include "prefix.h"
  35 #include "plist.h"
  36 #include "privs.h"
  37 #include "sigevent.h"
  38 #include "zclient.h"
  39 #include "vrf.h"
  40 #include "bfd.h"
  41 #include "libfrr.h"
  42
  43 #include "ospf6d.h"
  44 #include "ospf6_top.h"
  45 #include "ospf6_message.h"
  46 #include "ospf6_network.h"
  47 #include "ospf6_asbr.h"
  48 #include "ospf6_lsa.h"
  49 #include "ospf6_interface.h"
  50 #include "ospf6_zebra.h"
  51
  52 /* Default configuration file name for ospf6d. */
  53 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  54
  55 /* Default port values. */
  56 #define OSPF6_VTY_PORT             2606
  57
  58 /* ospf6d privileges */
  59 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  60
  61 struct zebra_privs_t ospf6d_privs = {
  62 #if defined(FRR_USER)
  63         .user = FRR_USER,
  64 #endif
  65 #if defined FRR_GROUP
  66         .group = FRR_GROUP,
  67 #endif
  68 #ifdef VTY_GROUP
  69         .vty_group = VTY_GROUP,
  70 #endif
  71         .caps_p = _caps_p,
  72         .cap_num_p = 2,
  73         .cap_num_i = 0};
  74
  75 /* ospf6d options, we use GNU getopt library. */
  76 struct option longopts[] = {{0}};
  77
  78 /* Master of threads. */
  79 struct thread_master *master;
  80
  81 static void __attribute__((noreturn)) ospf6_exit(int status)
  82 {
  83         struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
  84         struct interface *ifp;
  85
  86         frr_early_fini();
  87
  88         if (ospf6) {
  89                 ospf6_delete(ospf6);
  90                 ospf6 = NULL;
  91         }
  92
  93         bfd_gbl_exit();
  94
  95         FOR_ALL_INTERFACES (vrf, ifp)
  96                 if (ifp->info != NULL)
  97                         ospf6_interface_delete(ifp->info);
  98
  99         ospf6_message_terminate();
 100         ospf6_asbr_terminate();
 101         ospf6_lsa_terminate();
 102
 103         ospf6_serv_close();
 104         /* reverse access_list_init */
 105         access_list_reset();
 106
 107         /* reverse prefix_list_init */
 108         prefix_list_add_hook(NULL);
 109         prefix_list_delete_hook(NULL);
 110         prefix_list_reset();
 111
 112         vrf_terminate();
 113
 114         if (zclient) {
 115                 zclient_stop(zclient);
 116                 zclient_free(zclient);
 117         }
 118
 119         frr_fini();
 120         exit(status);
 121 }
 122
 123 /* SIGHUP handler. */
 124 static void sighup(void)
 125 {
 126         zlog_info("SIGHUP received");
 127 }
 128
 129 /* SIGINT handler. */
 130 static void sigint(void)
 131 {
 132         zlog_notice("Terminating on signal SIGINT");
 133         ospf6_exit(0);
 134 }
 135
 136 /* SIGTERM handler. */
 137 static void sigterm(void)
 138 {
 139         zlog_notice("Terminating on signal SIGTERM");
 140         ospf6_exit(0);
 141 }
 142
 143 /* SIGUSR1 handler. */
 144 static void sigusr1(void)
 145 {
 146         zlog_info("SIGUSR1 received");
 147         zlog_rotate();
 148 }
 149
 150 struct quagga_signal_t ospf6_signals[] = {
 151         {
 152                 .signal = SIGHUP,
 153                 .handler = &sighup,
 154         },
 155         {
 156                 .signal = SIGINT,
 157                 .handler = &sigint,
 158         },
 159         {
 160                 .signal = SIGTERM,
 161                 .handler = &sigterm,
 162         },
 163         {
 164                 .signal = SIGUSR1,
 165                 .handler = &sigusr1,
 166         },
 167 };
 168
 169 static const struct frr_yang_module_info *ospf6d_yang_modules[] = {
 170         &frr_interface_info,
 171 };
 172
 173 FRR_DAEMON_INFO(ospf6d, OSPF6, .vty_port = OSPF6_VTY_PORT,
 174
 175                 .proghelp = "Implementation of the OSPFv3 routing protocol.",
 176
 177                 .signals = ospf6_signals,
 178                 .n_signals = array_size(ospf6_signals),
 179
 180                 .privs = &ospf6d_privs, .yang_modules = ospf6d_yang_modules,
 181                 .n_yang_modules = array_size(ospf6d_yang_modules), )
 182
 183 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 184    state machine is handled here. */
 185 int main(int argc, char *argv[], char *envp[])
 186 {
 187         int opt;
 188
 189         frr_preinit(&ospf6d_di, argc, argv);
 190         frr_opt_add("", longopts, "");
 191
 192         /* Command line argument treatment. */
 193         while (1) {
 194                 opt = frr_getopt(argc, argv, NULL);
 195
 196                 if (opt == EOF)
 197                         break;
 198
 199                 switch (opt) {
 200                 case 0:
 201                         break;
 202                 default:
 203                         frr_help_exit(1);
 204                         break;
 205                 }
 206         }
 207
 208         if (geteuid() != 0) {
 209                 errno = EPERM;
 210                 perror(ospf6d_di.progname);
 211                 exit(1);
 212         }
 213
 214         /* OSPF6 master init. */
 215         ospf6_master_init();
 216
 217         /* thread master */
 218         master = frr_init();
 219
 220         vrf_init(NULL, NULL, NULL, NULL, NULL);
 221         access_list_init();
 222         prefix_list_init();
 223
 224         /* initialize ospf6 */
 225         ospf6_init();
 226
 227         frr_config_fork();
 228         frr_run(master);
 229
 230         /* Not reached. */
 231         ospf6_exit(0);
 232 }