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 "stream.h"
  33 #include "if.h"
  34 #include "privs.h"
  35 #include "sigevent.h"
  36 #include "filter.h"
  37 #include "plist.h"
  38 #include "zclient.h"
  39 #include "vrf.h"
  40 #include "qobj.h"
  41 #include "libfrr.h"
  42 #include "routemap.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 #include "isisd/isis_nb.h"
  61 #include "isisd/isis_ldp_sync.h"
  62
  63 /* Default configuration file name */
  64 #define ISISD_DEFAULT_CONFIG "isisd.conf"
  65 /* Default vty port */
  66 #define ISISD_VTY_PORT       2608
  67 #define FABRICD_VTY_PORT     2618
  68
  69 /* isisd privileges */
  70 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_SYS_ADMIN};
  71
  72 struct zebra_privs_t isisd_privs = {
  73 #if defined(FRR_USER)
  74         .user = FRR_USER,
  75 #endif
  76 #if defined FRR_GROUP
  77         .group = FRR_GROUP,
  78 #endif
  79 #ifdef VTY_GROUP
  80         .vty_group = VTY_GROUP,
  81 #endif
  82         .caps_p = _caps_p,
  83         .cap_num_p = array_size(_caps_p),
  84         .cap_num_i = 0};
  85
  86 /* isisd options */
  87 static const struct option longopts[] = {
  88         {"int_num", required_argument, NULL, 'I'},
  89         {0}};
  90
  91 /* Master of threads. */
  92 struct thread_master *master;
  93
  94 /*
  95  * Prototypes.
  96  */
  97 void sighup(void);
  98 void sigint(void);
  99 void sigterm(void);
 100 void sigusr1(void);
 101
 102
 103 static __attribute__((__noreturn__)) void terminate(int i)
 104 {
 105         isis_terminate();
 106         isis_sr_term();
 107         isis_zebra_stop();
 108         exit(i);
 109 }
 110
 111 /*
 112  * Signal handlers
 113  */
 114 #ifdef FABRICD
 115 void sighup(void)
 116 {
 117         zlog_notice("SIGHUP/reload is not implemented for fabricd");
 118         return;
 119 }
 120 #else
 121 static struct frr_daemon_info isisd_di;
 122 void sighup(void)
 123 {
 124         zlog_info("SIGHUP received");
 125
 126         /* Reload config file. */
 127         vty_read_config(NULL, isisd_di.config_file, config_default);
 128 }
 129
 130 #endif
 131
 132 __attribute__((__noreturn__)) void sigint(void)
 133 {
 134         zlog_notice("Terminating on signal SIGINT");
 135         terminate(0);
 136 }
 137
 138 __attribute__((__noreturn__)) void sigterm(void)
 139 {
 140         zlog_notice("Terminating on signal SIGTERM");
 141         terminate(0);
 142 }
 143
 144 void sigusr1(void)
 145 {
 146         zlog_debug("SIGUSR1 received");
 147         zlog_rotate();
 148 }
 149
 150 struct quagga_signal_t isisd_signals[] = {
 151         {
 152                 .signal = SIGHUP,
 153                 .handler = &sighup,
 154         },
 155         {
 156                 .signal = SIGUSR1,
 157                 .handler = &sigusr1,
 158         },
 159         {
 160                 .signal = SIGINT,
 161                 .handler = &sigint,
 162         },
 163         {
 164                 .signal = SIGTERM,
 165                 .handler = &sigterm,
 166         },
 167 };
 168
 169
 170 static const struct frr_yang_module_info *const isisd_yang_modules[] = {
 171         &frr_filter_info,
 172         &frr_interface_info,
 173 #ifndef FABRICD
 174         &frr_isisd_info,
 175 #endif /* ifndef FABRICD */
 176         &frr_route_map_info,
 177         &frr_vrf_info,
 178 };
 179
 180 #ifdef FABRICD
 181 FRR_DAEMON_INFO(fabricd, OPEN_FABRIC, .vty_port = FABRICD_VTY_PORT,
 182
 183                 .proghelp = "Implementation of the OpenFabric routing protocol.",
 184 #else
 185 FRR_DAEMON_INFO(isisd, ISIS, .vty_port = ISISD_VTY_PORT,
 186
 187                 .proghelp = "Implementation of the IS-IS routing protocol.",
 188 #endif
 189                 .copyright =
 190                         "Copyright (c) 2001-2002 Sampo Saaristo, Ofer Wald and Hannes Gredler",
 191
 192                 .signals = isisd_signals,
 193                 .n_signals = array_size(isisd_signals),
 194
 195                 .privs = &isisd_privs, .yang_modules = isisd_yang_modules,
 196                 .n_yang_modules = array_size(isisd_yang_modules),
 197 );
 198
 199 /*
 200  * Main routine of isisd. Parse arguments and handle IS-IS state machine.
 201  */
 202 int main(int argc, char **argv, char **envp)
 203 {
 204         int opt;
 205         int instance = 1;
 206
 207 #ifdef FABRICD
 208         frr_preinit(&fabricd_di, argc, argv);
 209 #else
 210         frr_preinit(&isisd_di, argc, argv);
 211 #endif
 212         frr_opt_add(
 213                 "I:", longopts,
 214                 "  -I, --int_num      Set instance number (label-manager)\n");
 215
 216         /* Command line argument treatment. */
 217         while (1) {
 218                 opt = frr_getopt(argc, argv, NULL);
 219
 220                 if (opt == EOF)
 221                         break;
 222
 223                 switch (opt) {
 224                 case 0:
 225                         break;
 226                 case 'I':
 227                         instance = atoi(optarg);
 228                         if (instance < 1 || instance > (unsigned short)-1)
 229                                 zlog_err("Instance %i out of range (1..%u)",
 230                                          instance, (unsigned short)-1);
 231                         break;
 232                 default:
 233                         frr_help_exit(1);
 234                         break;
 235                 }
 236         }
 237
 238         /* thread master */
 239         isis_master_init(frr_init());
 240         master = im->master;
 241         /*
 242          *  initializations
 243          */
 244         isis_error_init();
 245         access_list_init();
 246         access_list_add_hook(isis_filter_update);
 247         access_list_delete_hook(isis_filter_update);
 248         isis_vrf_init();
 249         prefix_list_init();
 250         prefix_list_add_hook(isis_prefix_list_update);
 251         prefix_list_delete_hook(isis_prefix_list_update);
 252         isis_init();
 253         isis_circuit_init();
 254 #ifdef FABRICD
 255         isis_vty_daemon_init();
 256 #endif /* FABRICD */
 257 #ifndef FABRICD
 258         isis_cli_init();
 259 #endif /* ifdef FABRICD */
 260         isis_spf_init();
 261         isis_redist_init();
 262         isis_route_map_init();
 263         isis_mpls_te_init();
 264         isis_sr_init();
 265         lsp_init();
 266         mt_init();
 267
 268         isis_zebra_init(master, instance);
 269         isis_bfd_init(master);
 270         isis_ldp_sync_init();
 271         fabricd_init();
 272
 273         frr_config_fork();
 274         frr_run(master);
 275
 276         /* Not reached. */
 277         exit(0);
 278 }