vrrpd/vrrp_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * VRRP entry point.
   4  * Copyright (C) 2018-2019 Cumulus Networks, Inc.
   5  * Quentin Young
   6  */
   7 #include <zebra.h>
   8
   9 #include <lib/version.h>
  10
  11 #include "lib/command.h"
  12 #include "lib/filter.h"
  13 #include "lib/getopt.h"
  14 #include "lib/if.h"
  15 #include "lib/libfrr.h"
  16 #include "lib/log.h"
  17 #include "lib/memory.h"
  18 #include "lib/nexthop.h"
  19 #include "lib/privs.h"
  20 #include "lib/sigevent.h"
  21 #include "lib/thread.h"
  22 #include "lib/vrf.h"
  23 #include "lib/vty.h"
  24
  25 #include "vrrp.h"
  26 #include "vrrp_debug.h"
  27 #include "vrrp_vty.h"
  28 #include "vrrp_zebra.h"
  29
  30 DEFINE_MGROUP(VRRPD, "vrrpd");
  31
  32 char backup_config_file[256];
  33
  34 zebra_capabilities_t _caps_p[] = {
  35         ZCAP_NET_RAW,
  36 };
  37
  38 struct zebra_privs_t vrrp_privs = {
  39 #if defined(FRR_USER) && defined(FRR_GROUP)
  40         .user = FRR_USER,
  41         .group = FRR_GROUP,
  42 #endif
  43 #if defined(VTY_GROUP)
  44         .vty_group = VTY_GROUP,
  45 #endif
  46         .caps_p = _caps_p,
  47         .cap_num_p = array_size(_caps_p),
  48         .cap_num_i = 0};
  49
  50 struct option longopts[] = { {0} };
  51
  52 /* Master of threads. */
  53 struct thread_master *master;
  54
  55 static struct frr_daemon_info vrrpd_di;
  56
  57 /* SIGHUP handler. */
  58 static void sighup(void)
  59 {
  60         zlog_info("SIGHUP received");
  61
  62         vty_read_config(NULL, vrrpd_di.config_file, config_default);
  63 }
  64
  65 /* SIGINT / SIGTERM handler. */
  66 static void __attribute__((noreturn)) sigint(void)
  67 {
  68         zlog_notice("Terminating on signal");
  69
  70         vrrp_fini();
  71
  72         frr_fini();
  73
  74         exit(0);
  75 }
  76
  77 /* SIGUSR1 handler. */
  78 static void sigusr1(void)
  79 {
  80         zlog_rotate();
  81 }
  82
  83 struct frr_signal_t vrrp_signals[] = {
  84         {
  85                 .signal = SIGHUP,
  86                 .handler = &sighup,
  87         },
  88         {
  89                 .signal = SIGUSR1,
  90                 .handler = &sigusr1,
  91         },
  92         {
  93                 .signal = SIGINT,
  94                 .handler = &sigint,
  95         },
  96         {
  97                 .signal = SIGTERM,
  98                 .handler = &sigint,
  99         },
 100 };
 101
 102 static const struct frr_yang_module_info *const vrrp_yang_modules[] = {
 103         &frr_filter_info,
 104         &frr_vrf_info,
 105         &frr_interface_info,
 106         &frr_vrrpd_info,
 107 };
 108
 109 #define VRRP_VTY_PORT 2619
 110
 111 FRR_DAEMON_INFO(vrrpd, VRRP, .vty_port = VRRP_VTY_PORT,
 112                 .proghelp = "Virtual Router Redundancy Protocol",
 113                 .signals = vrrp_signals,
 114                 .n_signals = array_size(vrrp_signals),
 115                 .privs = &vrrp_privs,
 116                 .yang_modules = vrrp_yang_modules,
 117                 .n_yang_modules = array_size(vrrp_yang_modules),
 118 );
 119
 120 int main(int argc, char **argv, char **envp)
 121 {
 122         frr_preinit(&vrrpd_di, argc, argv);
 123         frr_opt_add("", longopts, "");
 124
 125         while (1) {
 126                 int opt;
 127
 128                 opt = frr_getopt(argc, argv, NULL);
 129
 130                 if (opt == EOF)
 131                         break;
 132
 133                 switch (opt) {
 134                 case 0:
 135                         break;
 136                 default:
 137                         frr_help_exit(1);
 138                 }
 139         }
 140
 141         master = frr_init();
 142
 143         access_list_init();
 144         vrrp_debug_init();
 145         vrrp_zebra_init();
 146         vrrp_vty_init();
 147         vrrp_init();
 148
 149         snprintf(backup_config_file, sizeof(backup_config_file),
 150                  "%s/vrrpd.conf", frr_sysconfdir);
 151         vrrpd_di.backup_config_file = backup_config_file;
 152
 153         frr_config_fork();
 154         frr_run(master);
 155
 156         /* Not reached. */
 157         return 0;
 158 }