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