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