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_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};
  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 = 2,
  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 listnode *node;
  83         struct interface *ifp;
  84
  85         if (ospf6)
  86                 ospf6_delete(ospf6);
  87
  88         bfd_gbl_exit();
  89
  90         for (ALL_LIST_ELEMENTS_RO(vrf_iflist(VRF_DEFAULT), node, ifp))
  91                 if (ifp->info != NULL)
  92                         ospf6_interface_delete(ifp->info);
  93
  94         ospf6_message_terminate();
  95         ospf6_asbr_terminate();
  96         ospf6_lsa_terminate();
  97
  98         vrf_terminate();
  99         vty_terminate();
 100         cmd_terminate();
 101
 102         if (zclient) {
 103                 zclient_stop(zclient);
 104                 zclient_free(zclient);
 105         }
 106
 107         if (master)
 108                 thread_master_free(master);
 109
 110         closezlog();
 111
 112         exit(status);
 113 }
 114
 115 /* SIGHUP handler. */
 116 static void sighup(void)
 117 {
 118         zlog_info("SIGHUP received");
 119 }
 120
 121 /* SIGINT handler. */
 122 static void sigint(void)
 123 {
 124         zlog_notice("Terminating on signal SIGINT");
 125         ospf6_exit(0);
 126 }
 127
 128 /* SIGTERM handler. */
 129 static void sigterm(void)
 130 {
 131         zlog_notice("Terminating on signal SIGTERM");
 132         ospf6_clean();
 133         ospf6_exit(0);
 134 }
 135
 136 /* SIGUSR1 handler. */
 137 static void sigusr1(void)
 138 {
 139         zlog_info("SIGUSR1 received");
 140         zlog_rotate();
 141 }
 142
 143 struct quagga_signal_t ospf6_signals[] = {
 144         {
 145                 .signal = SIGHUP,
 146                 .handler = &sighup,
 147         },
 148         {
 149                 .signal = SIGINT,
 150                 .handler = &sigint,
 151         },
 152         {
 153                 .signal = SIGTERM,
 154                 .handler = &sigterm,
 155         },
 156         {
 157                 .signal = SIGUSR1,
 158                 .handler = &sigusr1,
 159         },
 160 };
 161
 162 FRR_DAEMON_INFO(ospf6d, OSPF6, .vty_port = OSPF6_VTY_PORT,
 163
 164                 .proghelp = "Implementation of the OSPFv3 routing protocol.",
 165
 166                 .signals = ospf6_signals,
 167                 .n_signals = array_size(ospf6_signals),
 168
 169                 .privs = &ospf6d_privs, )
 170
 171 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 172    state machine is handled here. */
 173 int main(int argc, char *argv[], char *envp[])
 174 {
 175         int opt;
 176
 177         frr_preinit(&ospf6d_di, argc, argv);
 178         frr_opt_add("", longopts, "");
 179
 180         /* Command line argument treatment. */
 181         while (1) {
 182                 opt = frr_getopt(argc, argv, NULL);
 183
 184                 if (opt == EOF)
 185                         break;
 186
 187                 switch (opt) {
 188                 case 0:
 189                         break;
 190                 default:
 191                         frr_help_exit(1);
 192                         break;
 193                 }
 194         }
 195
 196         if (geteuid() != 0) {
 197                 errno = EPERM;
 198                 perror(ospf6d_di.progname);
 199                 exit(1);
 200         }
 201
 202         /* thread master */
 203         master = frr_init();
 204
 205         vrf_init(NULL, NULL, NULL, NULL);
 206         access_list_init();
 207         prefix_list_init();
 208
 209         /* initialize ospf6 */
 210         ospf6_init();
 211
 212         frr_config_fork();
 213         frr_run(master);
 214
 215         /* Not reached. */
 216         ospf6_exit(0);
 217 }