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