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/dict.h"
  45 #include "isisd/isis_constants.h"
  46 #include "isisd/isis_common.h"
  47 #include "isisd/isis_flags.h"
  48 #include "isisd/isis_circuit.h"
  49 #include "isisd/isisd.h"
  50 #include "isisd/isis_dynhn.h"
  51 #include "isisd/isis_spf.h"
  52 #include "isisd/isis_route.h"
  53 #include "isisd/isis_routemap.h"
  54 #include "isisd/isis_zebra.h"
  55 #include "isisd/isis_te.h"
  56 #include "isisd/isis_errors.h"
  57 #include "isisd/isis_vty_common.h"
  58 #include "isisd/isis_bfd.h"
  59 #include "isisd/isis_lsp.h"
  60 #include "isisd/isis_mt.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 = sizeof(_caps_p) / sizeof(*_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
 110 void sighup(void)
 111 {
 112         zlog_notice("SIGHUP/reload is not implemented for isisd");
 113         return;
 114 }
 115
 116 __attribute__((__noreturn__)) void sigint(void)
 117 {
 118         zlog_notice("Terminating on signal SIGINT");
 119         terminate(0);
 120 }
 121
 122 __attribute__((__noreturn__)) void sigterm(void)
 123 {
 124         zlog_notice("Terminating on signal SIGTERM");
 125         terminate(0);
 126 }
 127
 128 void sigusr1(void)
 129 {
 130         zlog_debug("SIGUSR1 received");
 131         zlog_rotate();
 132 }
 133
 134 struct quagga_signal_t isisd_signals[] = {
 135         {
 136                 .signal = SIGHUP,
 137                 .handler = &sighup,
 138         },
 139         {
 140                 .signal = SIGUSR1,
 141                 .handler = &sigusr1,
 142         },
 143         {
 144                 .signal = SIGINT,
 145                 .handler = &sigint,
 146         },
 147         {
 148                 .signal = SIGTERM,
 149                 .handler = &sigterm,
 150         },
 151 };
 152
 153 static const struct frr_yang_module_info *isisd_yang_modules[] = {
 154         &frr_interface_info,
 155 };
 156
 157 #ifdef FABRICD
 158 FRR_DAEMON_INFO(fabricd, OPEN_FABRIC, .vty_port = FABRICD_VTY_PORT,
 159
 160                 .proghelp = "Implementation of the OpenFabric routing protocol.",
 161 #else
 162 FRR_DAEMON_INFO(isisd, ISIS, .vty_port = ISISD_VTY_PORT,
 163
 164                 .proghelp = "Implementation of the IS-IS routing protocol.",
 165 #endif
 166                 .copyright =
 167                         "Copyright (c) 2001-2002 Sampo Saaristo,"
 168                         " Ofer Wald and Hannes Gredler",
 169
 170                 .signals = isisd_signals,
 171                 .n_signals = array_size(isisd_signals),
 172
 173                 .privs = &isisd_privs, .yang_modules = isisd_yang_modules,
 174                 .n_yang_modules = array_size(isisd_yang_modules), )
 175
 176 /*
 177  * Main routine of isisd. Parse arguments and handle IS-IS state machine.
 178  */
 179 int main(int argc, char **argv, char **envp)
 180 {
 181         int opt;
 182
 183 #ifdef FABRICD
 184         frr_preinit(&fabricd_di, argc, argv);
 185 #else
 186         frr_preinit(&isisd_di, argc, argv);
 187 #endif
 188         frr_opt_add("", longopts, "");
 189
 190         /* Command line argument treatment. */
 191         while (1) {
 192                 opt = frr_getopt(argc, argv, NULL);
 193
 194                 if (opt == EOF)
 195                         break;
 196
 197                 switch (opt) {
 198                 case 0:
 199                         break;
 200                 default:
 201                         frr_help_exit(1);
 202                         break;
 203                 }
 204         }
 205
 206         /* thread master */
 207         master = frr_init();
 208
 209         /*
 210          *  initializations
 211          */
 212         isis_error_init();
 213         access_list_init();
 214         vrf_init(NULL, NULL, NULL, NULL, NULL);
 215         prefix_list_init();
 216         isis_init();
 217         isis_circuit_init();
 218         isis_vty_init();
 219         isis_spf_cmds_init();
 220         isis_redist_init();
 221         isis_route_map_init();
 222         isis_mpls_te_init();
 223         lsp_init();
 224         mt_init();
 225
 226         /* create the global 'isis' instance */
 227         isis_new(1);
 228
 229         isis_zebra_init(master);
 230         isis_bfd_init();
 231
 232         frr_config_fork();
 233         frr_run(master);
 234
 235         /* Not reached. */
 236         exit(0);
 237 }