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
  37 #include "vrrp.h"
  38 #include "vrrp_debug.h"
  39 #include "vrrp_vty.h"
  40 #include "vrrp_zebra.h"
  41
  42 char backup_config_file[256];
  43
  44 zebra_capabilities_t _caps_p[] = {
  45         ZCAP_NET_RAW,
  46 };
  47
  48 struct zebra_privs_t vrrp_privs = {
  49 #if defined(FRR_USER) && defined(FRR_GROUP)
  50         .user = FRR_USER,
  51         .group = FRR_GROUP,
  52 #endif
  53 #if defined(VTY_GROUP)
  54         .vty_group = VTY_GROUP,
  55 #endif
  56         .caps_p = _caps_p,
  57         .cap_num_p = array_size(_caps_p),
  58         .cap_num_i = 0};
  59
  60 struct option longopts[] = { {0} };
  61
  62 /* Master of threads. */
  63 struct thread_master *master;
  64
  65 /* SIGHUP handler. */
  66 static void sighup(void)
  67 {
  68         zlog_info("SIGHUP received");
  69 }
  70
  71 /* SIGINT / SIGTERM handler. */
  72 static void __attribute__((noreturn)) sigint(void)
  73 {
  74         zlog_notice("Terminating on signal");
  75
  76         vrrp_fini();
  77
  78         exit(0);
  79 }
  80
  81 /* SIGUSR1 handler. */
  82 static void sigusr1(void)
  83 {
  84         zlog_rotate();
  85 }
  86
  87 struct quagga_signal_t vrrp_signals[] = {
  88         {
  89                 .signal = SIGHUP,
  90                 .handler = &sighup,
  91         },
  92         {
  93                 .signal = SIGUSR1,
  94                 .handler = &sigusr1,
  95         },
  96         {
  97                 .signal = SIGINT,
  98                 .handler = &sigint,
  99         },
 100         {
 101                 .signal = SIGTERM,
 102                 .handler = &sigint,
 103         },
 104 };
 105
 106 static const struct frr_yang_module_info *vrrp_yang_modules[] = {
 107         &frr_interface_info,
 108 };
 109
 110 #define VRRP_VTY_PORT 2619
 111
 112 FRR_DAEMON_INFO(vrrpd, VRRP, .vty_port = VRRP_VTY_PORT,
 113                 .proghelp = "Virtual Router Redundancy Protocol",
 114                 .signals = vrrp_signals,
 115                 .n_signals = array_size(vrrp_signals),
 116                 .privs = &vrrp_privs,
 117                 .yang_modules = vrrp_yang_modules,
 118                 .n_yang_modules = array_size(vrrp_yang_modules),
 119 )
 120
 121 int main(int argc, char **argv, char **envp)
 122 {
 123         frr_preinit(&vrrpd_di, argc, argv);
 124         frr_opt_add("", longopts, "");
 125
 126         while (1) {
 127                 int opt;
 128
 129                 opt = frr_getopt(argc, argv, NULL);
 130
 131                 if (opt == EOF)
 132                         break;
 133
 134                 switch (opt) {
 135                 case 0:
 136                         break;
 137                 default:
 138                         frr_help_exit(1);
 139                         break;
 140                 }
 141         }
 142
 143         master = frr_init();
 144
 145         vrrp_debug_init();
 146         vrrp_zebra_init();
 147         vrrp_vty_init();
 148         vrrp_init();
 149
 150         snprintf(backup_config_file, sizeof(backup_config_file),
 151                  "%s/vrrpd.conf", frr_sysconfdir);
 152         vrrpd_di.backup_config_file = backup_config_file;
 153
 154         frr_config_fork();
 155         frr_run(master);
 156
 157         /* Not reached. */
 158         return 0;
 159 }