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 DEFINE_MGROUP(VRRPD, "vrrpd")
  43
  44 char backup_config_file[256];
  45
  46 zebra_capabilities_t _caps_p[] = {
  47         ZCAP_NET_RAW,
  48 };
  49
  50 struct zebra_privs_t vrrp_privs = {
  51 #if defined(FRR_USER) && defined(FRR_GROUP)
  52         .user = FRR_USER,
  53         .group = FRR_GROUP,
  54 #endif
  55 #if defined(VTY_GROUP)
  56         .vty_group = VTY_GROUP,
  57 #endif
  58         .caps_p = _caps_p,
  59         .cap_num_p = array_size(_caps_p),
  60         .cap_num_i = 0};
  61
  62 struct option longopts[] = { {0} };
  63
  64 /* Master of threads. */
  65 struct thread_master *master;
  66
  67 /* SIGHUP handler. */
  68 static void sighup(void)
  69 {
  70         zlog_info("SIGHUP received");
  71 }
  72
  73 /* SIGINT / SIGTERM handler. */
  74 static void __attribute__((noreturn)) sigint(void)
  75 {
  76         zlog_notice("Terminating on signal");
  77
  78         vrrp_fini();
  79
  80         exit(0);
  81 }
  82
  83 /* SIGUSR1 handler. */
  84 static void sigusr1(void)
  85 {
  86         zlog_rotate();
  87 }
  88
  89 struct quagga_signal_t vrrp_signals[] = {
  90         {
  91                 .signal = SIGHUP,
  92                 .handler = &sighup,
  93         },
  94         {
  95                 .signal = SIGUSR1,
  96                 .handler = &sigusr1,
  97         },
  98         {
  99                 .signal = SIGINT,
 100                 .handler = &sigint,
 101         },
 102         {
 103                 .signal = SIGTERM,
 104                 .handler = &sigint,
 105         },
 106 };
 107
 108 static const struct frr_yang_module_info *const vrrp_yang_modules[] = {
 109         &frr_interface_info,
 110 };
 111
 112 #define VRRP_VTY_PORT 2619
 113
 114 FRR_DAEMON_INFO(vrrpd, VRRP, .vty_port = VRRP_VTY_PORT,
 115                 .proghelp = "Virtual Router Redundancy Protocol",
 116                 .signals = vrrp_signals,
 117                 .n_signals = array_size(vrrp_signals),
 118                 .privs = &vrrp_privs,
 119                 .yang_modules = vrrp_yang_modules,
 120                 .n_yang_modules = array_size(vrrp_yang_modules),
 121 )
 122
 123 int main(int argc, char **argv, char **envp)
 124 {
 125         frr_preinit(&vrrpd_di, argc, argv);
 126         frr_opt_add("", longopts, "");
 127
 128         while (1) {
 129                 int opt;
 130
 131                 opt = frr_getopt(argc, argv, NULL);
 132
 133                 if (opt == EOF)
 134                         break;
 135
 136                 switch (opt) {
 137                 case 0:
 138                         break;
 139                 default:
 140                         frr_help_exit(1);
 141                         break;
 142                 }
 143         }
 144
 145         master = frr_init();
 146
 147         access_list_init();
 148         vrrp_debug_init();
 149         vrrp_zebra_init();
 150         vrrp_vty_init();
 151         vrrp_init();
 152
 153         snprintf(backup_config_file, sizeof(backup_config_file),
 154                  "%s/vrrpd.conf", frr_sysconfdir);
 155         vrrpd_di.backup_config_file = backup_config_file;
 156
 157         frr_config_fork();
 158         frr_run(master);
 159
 160         /* Not reached. */
 161         return 0;
 162 }