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
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include <lib/version.h>
  25 #include "getopt.h"
  26 #include "thread.h"
  27 #include "command.h"
  28 #include "memory.h"
  29 #include "memory_vty.h"
  30 #include "prefix.h"
  31 #include "filter.h"
  32 #include "keychain.h"
  33 #include "log.h"
  34 #include "privs.h"
  35 #include "sigevent.h"
  36 #include "zclient.h"
  37 #include "vrf.h"
  38 #include "libfrr.h"
  39
  40 #include "ripd/ripd.h"
  41
  42 /* ripd options. */
  43 static struct option longopts[] = {{"retain", no_argument, NULL, 'r'}, {0}};
  44
  45 /* ripd privileges */
  46 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  47
  48 struct zebra_privs_t ripd_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 /* Route retain mode flag. */
  63 int retain_mode = 0;
  64
  65 /* Master of threads. */
  66 struct thread_master *master;
  67
  68 static struct frr_daemon_info ripd_di;
  69
  70 /* SIGHUP handler. */
  71 static void sighup(void)
  72 {
  73         zlog_info("SIGHUP received");
  74         rip_clean();
  75         rip_reset();
  76         zlog_info("ripd restarting!");
  77
  78         /* Reload config file. */
  79         vty_read_config(ripd_di.config_file, config_default);
  80
  81         /* Try to return to normal operation. */
  82 }
  83
  84 /* SIGINT handler. */
  85 static void sigint(void)
  86 {
  87         zlog_notice("Terminating on signal");
  88
  89         if (!retain_mode)
  90                 rip_clean();
  91
  92         exit(0);
  93 }
  94
  95 /* SIGUSR1 handler. */
  96 static void sigusr1(void)
  97 {
  98         zlog_rotate();
  99 }
 100
 101 static struct quagga_signal_t ripd_signals[] = {
 102         {
 103                 .signal = SIGHUP,
 104                 .handler = &sighup,
 105         },
 106         {
 107                 .signal = SIGUSR1,
 108                 .handler = &sigusr1,
 109         },
 110         {
 111                 .signal = SIGINT,
 112                 .handler = &sigint,
 113         },
 114         {
 115                 .signal = SIGTERM,
 116                 .handler = &sigint,
 117         },
 118 };
 119
 120 FRR_DAEMON_INFO(ripd, RIP, .vty_port = RIP_VTY_PORT,
 121
 122                 .proghelp = "Implementation of the RIP routing protocol.",
 123
 124                 .signals = ripd_signals, .n_signals = array_size(ripd_signals),
 125
 126                 .privs = &ripd_privs, )
 127
 128 /* Main routine of ripd. */
 129 int main(int argc, char **argv)
 130 {
 131         frr_preinit(&ripd_di, argc, argv);
 132         frr_opt_add(
 133                 "r", longopts,
 134                 "  -r, --retain       When program terminates, retain added route by ripd.\n");
 135
 136         /* Command line option parse. */
 137         while (1) {
 138                 int opt;
 139
 140                 opt = frr_getopt(argc, argv, NULL);
 141
 142                 if (opt == EOF)
 143                         break;
 144
 145                 switch (opt) {
 146                 case 0:
 147                         break;
 148                 case 'r':
 149                         retain_mode = 1;
 150                         break;
 151                 default:
 152                         frr_help_exit(1);
 153                         break;
 154                 }
 155         }
 156
 157         /* Prepare master thread. */
 158         master = frr_init();
 159
 160         /* Library initialization. */
 161         keychain_init();
 162         vrf_init();
 163
 164         /* RIP related initialization. */
 165         rip_init();
 166         rip_if_init();
 167         rip_zclient_init(master);
 168         rip_peer_init();
 169
 170         frr_config_fork();
 171         frr_run(master);
 172
 173         /* Not reached. */
 174         return (0);
 175 }