isisd/isis_main.c

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_main.c
   3  *
   4  * Copyright (C) 2001,2002   Sampo Saaristo
   5  *                           Tampere University of Technology
   6  *                           Institute of Communications Engineering
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public Licenseas published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <zebra.h>
  24
  25 #include "getopt.h"
  26 #include "thread.h"
  27 #include "log.h"
  28 #include <lib/version.h>
  29 #include "command.h"
  30 #include "vty.h"
  31 #include "memory.h"
  32 #include "memory_vty.h"
  33 #include "stream.h"
  34 #include "if.h"
  35 #include "privs.h"
  36 #include "sigevent.h"
  37 #include "filter.h"
  38 #include "plist.h"
  39 #include "zclient.h"
  40 #include "vrf.h"
  41 #include "qobj.h"
  42 #include "libfrr.h"
  43
  44 #include "isisd/isis_constants.h"
  45 #include "isisd/isis_common.h"
  46 #include "isisd/isis_flags.h"
  47 #include "isisd/isis_circuit.h"
  48 #include "isisd/isisd.h"
  49 #include "isisd/isis_dynhn.h"
  50 #include "isisd/isis_spf.h"
  51 #include "isisd/isis_route.h"
  52 #include "isisd/isis_routemap.h"
  53 #include "isisd/isis_zebra.h"
  54 #include "isisd/isis_te.h"
  55 #include "isisd/isis_errors.h"
  56 #include "isisd/isis_bfd.h"
  57 #include "isisd/isis_lsp.h"
  58 #include "isisd/isis_mt.h"
  59 #include "isisd/fabricd.h"
  60
  61 /* Default configuration file name */
  62 #define ISISD_DEFAULT_CONFIG "isisd.conf"
  63 /* Default vty port */
  64 #define ISISD_VTY_PORT       2608
  65 #define FABRICD_VTY_PORT     2618
  66
  67 /* isisd privileges */
  68 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  69
  70 struct zebra_privs_t isisd_privs = {
  71 #if defined(FRR_USER)
  72         .user = FRR_USER,
  73 #endif
  74 #if defined FRR_GROUP
  75         .group = FRR_GROUP,
  76 #endif
  77 #ifdef VTY_GROUP
  78         .vty_group = VTY_GROUP,
  79 #endif
  80         .caps_p = _caps_p,
  81         .cap_num_p = array_size(_caps_p),
  82         .cap_num_i = 0};
  83
  84 /* isisd options */
  85 struct option longopts[] = {{0}};
  86
  87 /* Master of threads. */
  88 struct thread_master *master;
  89
  90 /*
  91  * Prototypes.
  92  */
  93 void sighup(void);
  94 void sigint(void);
  95 void sigterm(void);
  96 void sigusr1(void);
  97
  98
  99 static __attribute__((__noreturn__)) void terminate(int i)
 100 {
 101         isis_zebra_stop();
 102         exit(i);
 103 }
 104
 105 /*
 106  * Signal handlers
 107  */
 108 #ifdef FABRICD
 109 void sighup(void)
 110 {
 111         zlog_notice("SIGHUP/reload is not implemented for fabricd");
 112         return;
 113 }
 114 #else
 115 static struct frr_daemon_info isisd_di;
 116 void sighup(void)
 117 {
 118         zlog_info("SIGHUP received");
 119
 120         /* Reload config file. */
 121         vty_read_config(NULL, isisd_di.config_file, config_default);
 122 }
 123
 124 #endif
 125
 126 __attribute__((__noreturn__)) void sigint(void)
 127 {
 128         zlog_notice("Terminating on signal SIGINT");
 129         terminate(0);
 130 }
 131
 132 __attribute__((__noreturn__)) void sigterm(void)
 133 {
 134         zlog_notice("Terminating on signal SIGTERM");
 135         terminate(0);
 136 }
 137
 138 void sigusr1(void)
 139 {
 140         zlog_debug("SIGUSR1 received");
 141         zlog_rotate();
 142 }
 143
 144 struct quagga_signal_t isisd_signals[] = {
 145         {
 146                 .signal = SIGHUP,
 147                 .handler = &sighup,
 148         },
 149         {
 150                 .signal = SIGUSR1,
 151                 .handler = &sigusr1,
 152         },
 153         {
 154                 .signal = SIGINT,
 155                 .handler = &sigint,
 156         },
 157         {
 158                 .signal = SIGTERM,
 159                 .handler = &sigterm,
 160         },
 161 };
 162
 163
 164 static const struct frr_yang_module_info *isisd_yang_modules[] = {
 165         &frr_interface_info,
 166 #ifndef FABRICD
 167         &frr_isisd_info,
 168 #endif /* ifndef FABRICD */
 169 };
 170
 171 #ifdef FABRICD
 172 FRR_DAEMON_INFO(fabricd, OPEN_FABRIC, .vty_port = FABRICD_VTY_PORT,
 173
 174                 .proghelp = "Implementation of the OpenFabric routing protocol.",
 175 #else
 176 FRR_DAEMON_INFO(isisd, ISIS, .vty_port = ISISD_VTY_PORT,
 177
 178                 .proghelp = "Implementation of the IS-IS routing protocol.",
 179 #endif
 180                 .copyright =
 181                         "Copyright (c) 2001-2002 Sampo Saaristo,"
 182                         " Ofer Wald and Hannes Gredler",
 183
 184                 .signals = isisd_signals,
 185                 .n_signals = array_size(isisd_signals),
 186
 187                 .privs = &isisd_privs, .yang_modules = isisd_yang_modules,
 188                 .n_yang_modules = array_size(isisd_yang_modules), )
 189
 190 /*
 191  * Main routine of isisd. Parse arguments and handle IS-IS state machine.
 192  */
 193 int main(int argc, char **argv, char **envp)
 194 {
 195         int opt;
 196
 197 #ifdef FABRICD
 198         frr_preinit(&fabricd_di, argc, argv);
 199 #else
 200         frr_preinit(&isisd_di, argc, argv);
 201 #endif
 202         frr_opt_add("", longopts, "");
 203
 204         /* Command line argument treatment. */
 205         while (1) {
 206                 opt = frr_getopt(argc, argv, NULL);
 207
 208                 if (opt == EOF)
 209                         break;
 210
 211                 switch (opt) {
 212                 case 0:
 213                         break;
 214                 default:
 215                         frr_help_exit(1);
 216                         break;
 217                 }
 218         }
 219
 220         /* thread master */
 221         master = frr_init();
 222
 223         /*
 224          *  initializations
 225          */
 226         isis_error_init();
 227         access_list_init();
 228         vrf_init(NULL, NULL, NULL, NULL, NULL);
 229         prefix_list_init();
 230         isis_init();
 231         isis_circuit_init();
 232 #ifdef FABRICD
 233         isis_vty_daemon_init();
 234 #endif /* FABRICD */
 235 #ifndef FABRICD
 236         isis_cli_init();
 237 #endif /* ifdef FABRICD */
 238         isis_spf_cmds_init();
 239         isis_redist_init();
 240         isis_route_map_init();
 241         isis_mpls_te_init();
 242         lsp_init();
 243         mt_init();
 244
 245         /* create the global 'isis' instance */
 246         isis_new(1, VRF_DEFAULT);
 247
 248         isis_zebra_init(master);
 249         isis_bfd_init();
 250         fabricd_init();
 251
 252         frr_config_fork();
 253         frr_run(master);
 254
 255         /* Not reached. */
 256         exit(0);
 257 }