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_tlv.h"
  56 #include "isisd/isis_te.h"
  57
  58 /* Default configuration file name */
  59 #define ISISD_DEFAULT_CONFIG "isisd.conf"
  60 /* Default vty port */
  61 #define ISISD_VTY_PORT       2608
  62
  63 /* isisd privileges */
  64 zebra_capabilities_t _caps_p[] = {
  65   ZCAP_NET_RAW,
  66   ZCAP_BIND
  67 };
  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
  84 /* isisd options */
  85 struct option longopts[] = {
  86   {0}
  87 };
  88
  89 /* Master of threads. */
  90 struct thread_master *master;
  91
  92 /*
  93  * Prototypes.
  94  */
  95 void sighup(void);
  96 void sigint(void);
  97 void sigterm(void);
  98 void sigusr1(void);
  99
 100
 101 static __attribute__((__noreturn__)) void
 102 terminate (int i)
 103 {
 104   isis_zebra_stop ();
 105   exit (i);
 106 }
 107
 108 /*
 109  * Signal handlers
 110  */
 111
 112 void
 113 sighup (void)
 114 {
 115   zlog_err ("SIGHUP/reload is not implemented for isisd");
 116   return;
 117 }
 118
 119 __attribute__((__noreturn__)) void
 120 sigint (void)
 121 {
 122   zlog_notice ("Terminating on signal SIGINT");
 123   terminate (0);
 124 }
 125
 126 __attribute__((__noreturn__)) void
 127 sigterm (void)
 128 {
 129   zlog_notice ("Terminating on signal SIGTERM");
 130   terminate (0);
 131 }
 132
 133 void
 134 sigusr1 (void)
 135 {
 136   zlog_debug ("SIGUSR1 received");
 137   zlog_rotate();
 138 }
 139
 140 struct quagga_signal_t isisd_signals[] =
 141 {
 142   {
 143    .signal = SIGHUP,
 144    .handler = &sighup,
 145    },
 146   {
 147    .signal = SIGUSR1,
 148    .handler = &sigusr1,
 149    },
 150   {
 151    .signal = SIGINT,
 152    .handler = &sigint,
 153    },
 154   {
 155    .signal = SIGTERM,
 156    .handler = &sigterm,
 157    },
 158 };
 159
 160 FRR_DAEMON_INFO(isisd, ISIS,
 161         .vty_port = ISISD_VTY_PORT,
 162
 163         .proghelp = "Implementation of the IS-IS routing protocol.",
 164         .copyright = "Copyright (c) 2001-2002 Sampo Saaristo,"
 165                   " Ofer Wald and Hannes Gredler",
 166
 167         .signals = isisd_signals,
 168         .n_signals = array_size(isisd_signals),
 169
 170         .privs = &isisd_privs,
 171 )
 172
 173 /*
 174  * Main routine of isisd. Parse arguments and handle IS-IS state machine.
 175  */
 176 int
 177 main (int argc, char **argv, char **envp)
 178 {
 179   int opt;
 180
 181   frr_preinit (&isisd_di, argc, argv);
 182   frr_opt_add ("", longopts, "");
 183
 184   /* Command line argument treatment. */
 185   while (1)
 186     {
 187       opt = frr_getopt (argc, argv, NULL);
 188
 189       if (opt == EOF)
 190         break;
 191
 192       switch (opt)
 193         {
 194         case 0:
 195           break;
 196         default:
 197           frr_help_exit (1);
 198           break;
 199         }
 200     }
 201
 202   vty_config_lockless ();
 203   /* thread master */
 204   master = frr_init ();
 205
 206   /*
 207    *  initializations
 208    */
 209   access_list_init();
 210   vrf_init (NULL, NULL, NULL, NULL);
 211   prefix_list_init();
 212   isis_init ();
 213   isis_circuit_init ();
 214   isis_spf_cmds_init ();
 215   isis_redist_init ();
 216   isis_route_map_init();
 217   isis_mpls_te_init();
 218
 219   /* create the global 'isis' instance */
 220   isis_new (1);
 221
 222   isis_zebra_init(master);
 223
 224   frr_config_fork ();
 225   frr_run (master);
 226
 227   /* Not reached. */
 228   exit (0);
 229 }