ripd/rip_main.c

   1 /* RIPd main routine.
   2  * Copyright (C) 1997, 98 Kunihiro Ishiguro <kunihiro@zebra.org>
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include <lib/version.h>
  24 #include "getopt.h"
  25 #include "thread.h"
  26 #include "command.h"
  27 #include "memory.h"
  28 #include "memory_vty.h"
  29 #include "prefix.h"
  30 #include "filter.h"
  31 #include "keychain.h"
  32 #include "log.h"
  33 #include "privs.h"
  34 #include "sigevent.h"
  35 #include "zclient.h"
  36 #include "vrf.h"
  37 #include "libfrr.h"
  38
  39 #include "ripd/ripd.h"
  40
  41 /* ripd options. */
  42 static struct option longopts[] = {{"retain", no_argument, NULL, 'r'}, {0}};
  43
  44 /* ripd privileges */
  45 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  46
  47 struct zebra_privs_t ripd_privs = {
  48 #if defined(FRR_USER)
  49         .user = FRR_USER,
  50 #endif
  51 #if defined FRR_GROUP
  52         .group = FRR_GROUP,
  53 #endif
  54 #ifdef VTY_GROUP
  55         .vty_group = VTY_GROUP,
  56 #endif
  57         .caps_p = _caps_p,
  58         .cap_num_p = 2,
  59         .cap_num_i = 0};
  60
  61 /* Route retain mode flag. */
  62 int retain_mode = 0;
  63
  64 /* Master of threads. */
  65 struct thread_master *master;
  66
  67 static struct frr_daemon_info ripd_di;
  68
  69 /* SIGHUP handler. */
  70 static void sighup(void)
  71 {
  72         zlog_info("SIGHUP received");
  73         rip_clean();
  74         rip_reset();
  75         zlog_info("ripd restarting!");
  76
  77         /* Reload config file. */
  78         vty_read_config(ripd_di.config_file, config_default);
  79
  80         /* Try to return to normal operation. */
  81 }
  82
  83 /* SIGINT handler. */
  84 static void sigint(void)
  85 {
  86         zlog_notice("Terminating on signal");
  87
  88         if (!retain_mode)
  89                 rip_clean();
  90
  91         rip_zclient_stop();
  92
  93         exit(0);
  94 }
  95
  96 /* SIGUSR1 handler. */
  97 static void sigusr1(void)
  98 {
  99         zlog_rotate();
 100 }
 101
 102 static struct quagga_signal_t ripd_signals[] = {
 103         {
 104                 .signal = SIGHUP,
 105                 .handler = &sighup,
 106         },
 107         {
 108                 .signal = SIGUSR1,
 109                 .handler = &sigusr1,
 110         },
 111         {
 112                 .signal = SIGINT,
 113                 .handler = &sigint,
 114         },
 115         {
 116                 .signal = SIGTERM,
 117                 .handler = &sigint,
 118         },
 119 };
 120
 121 FRR_DAEMON_INFO(ripd, RIP, .vty_port = RIP_VTY_PORT,
 122
 123                 .proghelp = "Implementation of the RIP routing protocol.",
 124
 125                 .signals = ripd_signals, .n_signals = array_size(ripd_signals),
 126
 127                 .privs = &ripd_privs, )
 128
 129 /* Main routine of ripd. */
 130 int main(int argc, char **argv)
 131 {
 132         frr_preinit(&ripd_di, argc, argv);
 133         frr_opt_add(
 134                 "r", longopts,
 135                 "  -r, --retain       When program terminates, retain added route by ripd.\n");
 136
 137         /* Command line option parse. */
 138         while (1) {
 139                 int opt;
 140
 141                 opt = frr_getopt(argc, argv, NULL);
 142
 143                 if (opt == EOF)
 144                         break;
 145
 146                 switch (opt) {
 147                 case 0:
 148                         break;
 149                 case 'r':
 150                         retain_mode = 1;
 151                         break;
 152                 default:
 153                         frr_help_exit(1);
 154                         break;
 155                 }
 156         }
 157
 158         /* Prepare master thread. */
 159         master = frr_init();
 160
 161         /* Library initialization. */
 162         keychain_init();
 163         vrf_init(NULL, NULL, NULL, NULL);
 164
 165         /* RIP related initialization. */
 166         rip_init();
 167         rip_if_init();
 168         rip_zclient_init(master);
 169         rip_peer_init();
 170
 171         frr_config_fork();
 172         frr_run(master);
 173
 174         /* Not reached. */
 175         return (0);
 176 }