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 "if.h"
  32 #include "filter.h"
  33 #include "prefix.h"
  34 #include "plist.h"
  35 #include "privs.h"
  36 #include "sigevent.h"
  37 #include "zclient.h"
  38 #include "vrf.h"
  39 #include "bfd.h"
  40 #include "libfrr.h"
  41
  42 #include "ospf6d.h"
  43 #include "ospf6_top.h"
  44 #include "ospf6_message.h"
  45 #include "ospf6_network.h"
  46 #include "ospf6_asbr.h"
  47 #include "ospf6_lsa.h"
  48 #include "ospf6_interface.h"
  49 #include "ospf6_zebra.h"
  50
  51 /* Default configuration file name for ospf6d. */
  52 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  53
  54 /* Default port values. */
  55 #define OSPF6_VTY_PORT             2606
  56
  57 /* ospf6d privileges */
  58 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_SYS_ADMIN};
  59
  60 struct zebra_privs_t ospf6d_privs = {
  61 #if defined(FRR_USER)
  62         .user = FRR_USER,
  63 #endif
  64 #if defined FRR_GROUP
  65         .group = FRR_GROUP,
  66 #endif
  67 #ifdef 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 /* ospf6d options, we use GNU getopt library. */
  75 struct option longopts[] = {{0}};
  76
  77 /* Master of threads. */
  78 struct thread_master *master;
  79
  80 static void __attribute__((noreturn)) ospf6_exit(int status)
  81 {
  82         struct vrf *vrf;
  83         struct interface *ifp;
  84         struct ospf6 *ospf6;
  85         struct listnode *node, *nnode;
  86
  87         frr_early_fini();
  88
  89         for (ALL_LIST_ELEMENTS(om6->ospf6, node, nnode, ospf6)) {
  90                 vrf = vrf_lookup_by_id(ospf6->vrf_id);
  91                 ospf6_delete(ospf6);
  92                 ospf6 = NULL;
  93                 FOR_ALL_INTERFACES (vrf, ifp)
  94                         if (ifp->info != NULL)
  95                                 ospf6_interface_delete(ifp->info);
  96         }
  97
  98         bfd_gbl_exit();
  99
 100
 101         ospf6_message_terminate();
 102         ospf6_asbr_terminate();
 103         ospf6_lsa_terminate();
 104
 105         /* reverse access_list_init */
 106         access_list_reset();
 107
 108         /* reverse prefix_list_init */
 109         prefix_list_add_hook(NULL);
 110         prefix_list_delete_hook(NULL);
 111         prefix_list_reset();
 112
 113         vrf_terminate();
 114
 115         if (zclient) {
 116                 zclient_stop(zclient);
 117                 zclient_free(zclient);
 118         }
 119
 120         frr_fini();
 121         exit(status);
 122 }
 123
 124 /* SIGHUP handler. */
 125 static void sighup(void)
 126 {
 127         zlog_info("SIGHUP received");
 128 }
 129
 130 /* SIGINT handler. */
 131 static void sigint(void)
 132 {
 133         zlog_notice("Terminating on signal SIGINT");
 134         ospf6_exit(0);
 135 }
 136
 137 /* SIGTERM handler. */
 138 static void sigterm(void)
 139 {
 140         zlog_notice("Terminating on signal SIGTERM");
 141         ospf6_exit(0);
 142 }
 143
 144 /* SIGUSR1 handler. */
 145 static void sigusr1(void)
 146 {
 147         zlog_info("SIGUSR1 received");
 148         zlog_rotate();
 149 }
 150
 151 struct quagga_signal_t ospf6_signals[] = {
 152         {
 153                 .signal = SIGHUP,
 154                 .handler = &sighup,
 155         },
 156         {
 157                 .signal = SIGINT,
 158                 .handler = &sigint,
 159         },
 160         {
 161                 .signal = SIGTERM,
 162                 .handler = &sigterm,
 163         },
 164         {
 165                 .signal = SIGUSR1,
 166                 .handler = &sigusr1,
 167         },
 168 };
 169
 170 static const struct frr_yang_module_info *const ospf6d_yang_modules[] = {
 171         &frr_filter_info,
 172         &frr_interface_info,
 173         &frr_route_map_info,
 174         &frr_vrf_info,
 175 };
 176
 177 FRR_DAEMON_INFO(ospf6d, OSPF6, .vty_port = OSPF6_VTY_PORT,
 178
 179                 .proghelp = "Implementation of the OSPFv3 routing protocol.",
 180
 181                 .signals = ospf6_signals,
 182                 .n_signals = array_size(ospf6_signals),
 183
 184                 .privs = &ospf6d_privs, .yang_modules = ospf6d_yang_modules,
 185                 .n_yang_modules = array_size(ospf6d_yang_modules), )
 186
 187 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 188    state machine is handled here. */
 189 int main(int argc, char *argv[], char *envp[])
 190 {
 191         int opt;
 192
 193         frr_preinit(&ospf6d_di, argc, argv);
 194         frr_opt_add("", longopts, "");
 195
 196         /* Command line argument treatment. */
 197         while (1) {
 198                 opt = frr_getopt(argc, argv, NULL);
 199
 200                 if (opt == EOF)
 201                         break;
 202
 203                 switch (opt) {
 204                 case 0:
 205                         break;
 206                 default:
 207                         frr_help_exit(1);
 208                         break;
 209                 }
 210         }
 211
 212         if (geteuid() != 0) {
 213                 errno = EPERM;
 214                 perror(ospf6d_di.progname);
 215                 exit(1);
 216         }
 217
 218         /* OSPF6 master init. */
 219         ospf6_master_init(frr_init());
 220
 221         /* thread master */
 222         master = om6->master;
 223
 224         vrf_init(NULL, NULL, NULL, NULL, NULL);
 225         access_list_init();
 226         prefix_list_init();
 227
 228         /* initialize ospf6 */
 229         ospf6_init(master);
 230
 231         frr_config_fork();
 232         frr_run(master);
 233
 234         /* Not reached. */
 235         ospf6_exit(0);
 236 }