ripngd/ripng_main.c

   1 /*
   2  * RIPngd main routine.
   3  * Copyright (C) 1998, 1999 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include <lib/version.h>
  25 #include "getopt.h"
  26 #include "vector.h"
  27 #include "vty.h"
  28 #include "command.h"
  29 #include "memory.h"
  30 #include "memory_vty.h"
  31 #include "thread.h"
  32 #include "log.h"
  33 #include "prefix.h"
  34 #include "if.h"
  35 #include "privs.h"
  36 #include "sigevent.h"
  37 #include "vrf.h"
  38 #include "libfrr.h"
  39
  40 #include "ripngd/ripngd.h"
  41
  42 /* RIPngd options. */
  43 struct option longopts[] = {{"retain", no_argument, NULL, 'r'}, {0}};
  44
  45 /* ripngd privileges */
  46 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  47
  48 struct zebra_privs_t ripngd_privs = {
  49 #if defined(FRR_USER)
  50         .user = FRR_USER,
  51 #endif
  52 #if defined FRR_GROUP
  53         .group = FRR_GROUP,
  54 #endif
  55 #ifdef VTY_GROUP
  56         .vty_group = VTY_GROUP,
  57 #endif
  58         .caps_p = _caps_p,
  59         .cap_num_p = 2,
  60         .cap_num_i = 0};
  61
  62
  63 /* RIPngd program name */
  64
  65 /* Route retain mode flag. */
  66 int retain_mode = 0;
  67
  68 /* Master of threads. */
  69 struct thread_master *master;
  70
  71 static struct frr_daemon_info ripngd_di;
  72
  73 /* SIGHUP handler. */
  74 static void sighup(void)
  75 {
  76         zlog_info("SIGHUP received");
  77         ripng_clean();
  78         ripng_reset();
  79
  80         /* Reload config file. */
  81         vty_read_config(ripngd_di.config_file, config_default);
  82
  83         /* Try to return to normal operation. */
  84 }
  85
  86 /* SIGINT handler. */
  87 static void sigint(void)
  88 {
  89         zlog_notice("Terminating on signal");
  90
  91         if (!retain_mode)
  92                 ripng_clean();
  93
  94         ripng_zebra_stop();
  95         frr_fini();
  96         exit(0);
  97 }
  98
  99 /* SIGUSR1 handler. */
 100 static void sigusr1(void)
 101 {
 102         zlog_rotate();
 103 }
 104
 105 struct quagga_signal_t ripng_signals[] = {
 106         {
 107                 .signal = SIGHUP,
 108                 .handler = &sighup,
 109         },
 110         {
 111                 .signal = SIGUSR1,
 112                 .handler = &sigusr1,
 113         },
 114         {
 115                 .signal = SIGINT,
 116                 .handler = &sigint,
 117         },
 118         {
 119                 .signal = SIGTERM,
 120                 .handler = &sigint,
 121         },
 122 };
 123
 124 FRR_DAEMON_INFO(ripngd, RIPNG, .vty_port = RIPNG_VTY_PORT,
 125
 126                 .proghelp = "Implementation of the RIPng routing protocol.",
 127
 128                 .signals = ripng_signals,
 129                 .n_signals = array_size(ripng_signals),
 130
 131                 .privs = &ripngd_privs, )
 132
 133 /* RIPngd main routine. */
 134 int main(int argc, char **argv)
 135 {
 136         frr_preinit(&ripngd_di, argc, argv);
 137         frr_opt_add(
 138                 "r", longopts,
 139                 "  -r, --retain       When program terminates, retain added route by ripd.\n");
 140
 141         while (1) {
 142                 int opt;
 143
 144                 opt = frr_getopt(argc, argv, NULL);
 145
 146                 if (opt == EOF)
 147                         break;
 148
 149                 switch (opt) {
 150                 case 0:
 151                         break;
 152                 case 'r':
 153                         retain_mode = 1;
 154                         break;
 155                 default:
 156                         frr_help_exit(1);
 157                         break;
 158                 }
 159         }
 160
 161         master = frr_init();
 162
 163         /* Library inits. */
 164         vrf_init(NULL, NULL, NULL, NULL);
 165
 166         /* RIPngd inits. */
 167         ripng_init();
 168         zebra_init(master);
 169         ripng_peer_init();
 170
 171         frr_config_fork();
 172         frr_run(master);
 173
 174         /* Not reached. */
 175         return 0;
 176 }