vrrpd/vrrp_main.c

   1 /*
   2  * VRRP entry point.
   3  * Copyright (C) 2018-2019 Cumulus Networks, Inc.
   4  * Quentin Young
   5  *
   6  * This program 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 Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * 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 #include <zebra.h>
  21
  22 #include <lib/version.h>
  23
  24 #include "lib/command.h"
  25 #include "lib/filter.h"
  26 #include "lib/getopt.h"
  27 #include "lib/if.h"
  28 #include "lib/libfrr.h"
  29 #include "lib/log.h"
  30 #include "lib/memory.h"
  31 #include "lib/nexthop.h"
  32 #include "lib/privs.h"
  33 #include "lib/sigevent.h"
  34 #include "lib/thread.h"
  35 #include "lib/vrf.h"
  36 #include "lib/vty.h"
  37
  38 #include "vrrp.h"
  39 #include "vrrp_debug.h"
  40 #include "vrrp_vty.h"
  41 #include "vrrp_zebra.h"
  42
  43 DEFINE_MGROUP(VRRPD, "vrrpd");
  44
  45 char backup_config_file[256];
  46
  47 zebra_capabilities_t _caps_p[] = {
  48         ZCAP_NET_RAW,
  49 };
  50
  51 struct zebra_privs_t vrrp_privs = {
  52 #if defined(FRR_USER) && defined(FRR_GROUP)
  53         .user = FRR_USER,
  54         .group = FRR_GROUP,
  55 #endif
  56 #if defined(VTY_GROUP)
  57         .vty_group = VTY_GROUP,
  58 #endif
  59         .caps_p = _caps_p,
  60         .cap_num_p = array_size(_caps_p),
  61         .cap_num_i = 0};
  62
  63 struct option longopts[] = { {0} };
  64
  65 /* Master of threads. */
  66 struct thread_master *master;
  67
  68 static struct frr_daemon_info vrrpd_di;
  69
  70 /* SIGHUP handler. */
  71 static void sighup(void)
  72 {
  73         zlog_info("SIGHUP received");
  74
  75         vty_read_config(NULL, vrrpd_di.config_file, config_default);
  76 }
  77
  78 /* SIGINT / SIGTERM handler. */
  79 static void __attribute__((noreturn)) sigint(void)
  80 {
  81         zlog_notice("Terminating on signal");
  82
  83         vrrp_fini();
  84
  85         frr_fini();
  86
  87         exit(0);
  88 }
  89
  90 /* SIGUSR1 handler. */
  91 static void sigusr1(void)
  92 {
  93         zlog_rotate();
  94 }
  95
  96 struct frr_signal_t vrrp_signals[] = {
  97         {
  98                 .signal = SIGHUP,
  99                 .handler = &sighup,
 100         },
 101         {
 102                 .signal = SIGUSR1,
 103                 .handler = &sigusr1,
 104         },
 105         {
 106                 .signal = SIGINT,
 107                 .handler = &sigint,
 108         },
 109         {
 110                 .signal = SIGTERM,
 111                 .handler = &sigint,
 112         },
 113 };
 114
 115 static const struct frr_yang_module_info *const vrrp_yang_modules[] = {
 116         &frr_filter_info,
 117         &frr_vrf_info,
 118         &frr_interface_info,
 119         &frr_vrrpd_info,
 120 };
 121
 122 #define VRRP_VTY_PORT 2619
 123
 124 FRR_DAEMON_INFO(vrrpd, VRRP, .vty_port = VRRP_VTY_PORT,
 125                 .proghelp = "Virtual Router Redundancy Protocol",
 126                 .signals = vrrp_signals,
 127                 .n_signals = array_size(vrrp_signals),
 128                 .privs = &vrrp_privs,
 129                 .yang_modules = vrrp_yang_modules,
 130                 .n_yang_modules = array_size(vrrp_yang_modules),
 131 );
 132
 133 int main(int argc, char **argv, char **envp)
 134 {
 135         frr_preinit(&vrrpd_di, argc, argv);
 136         frr_opt_add("", longopts, "");
 137
 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                 default:
 150                         frr_help_exit(1);
 151                 }
 152         }
 153
 154         master = frr_init();
 155
 156         access_list_init();
 157         vrrp_debug_init();
 158         vrrp_zebra_init();
 159         vrrp_vty_init();
 160         vrrp_init();
 161
 162         snprintf(backup_config_file, sizeof(backup_config_file),
 163                  "%s/vrrpd.conf", frr_sysconfdir);
 164         vrrpd_di.backup_config_file = backup_config_file;
 165
 166         frr_config_fork();
 167         frr_run(master);
 168
 169         /* Not reached. */
 170         return 0;
 171 }