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