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 <getopt.h>
  10
  11 #include <lib/version.h>
  12
  13 #include "lib/command.h"
  14 #include "lib/filter.h"
  15 #include "lib/if.h"
  16 #include "lib/libfrr.h"
  17 #include "lib/log.h"
  18 #include "lib/memory.h"
  19 #include "lib/nexthop.h"
  20 #include "lib/privs.h"
  21 #include "lib/sigevent.h"
  22 #include "lib/frrevent.h"
  23 #include "lib/vrf.h"
  24 #include "lib/vty.h"
  25
  26 #include "vrrp.h"
  27 #include "vrrp_debug.h"
  28 #include "vrrp_vty.h"
  29 #include "vrrp_zebra.h"
  30
  31 DEFINE_MGROUP(VRRPD, "vrrpd");
  32
  33 char backup_config_file[256];
  34
  35 zebra_capabilities_t _caps_p[] = {
  36         ZCAP_NET_RAW,
  37 };
  38
  39 struct zebra_privs_t vrrp_privs = {
  40 #if defined(FRR_USER) && defined(FRR_GROUP)
  41         .user = FRR_USER,
  42         .group = FRR_GROUP,
  43 #endif
  44 #if defined(VTY_GROUP)
  45         .vty_group = VTY_GROUP,
  46 #endif
  47         .caps_p = _caps_p,
  48         .cap_num_p = array_size(_caps_p),
  49         .cap_num_i = 0};
  50
  51 struct option longopts[] = { {0} };
  52
  53 /* Master of threads. */
  54 struct event_loop *master;
  55
  56 static struct frr_daemon_info vrrpd_di;
  57
  58 /* SIGHUP handler. */
  59 static void sighup(void)
  60 {
  61         zlog_info("SIGHUP received");
  62
  63         vty_read_config(NULL, vrrpd_di.config_file, config_default);
  64 }
  65
  66 /* SIGINT / SIGTERM handler. */
  67 static void __attribute__((noreturn)) sigint(void)
  68 {
  69         zlog_notice("Terminating on signal");
  70
  71         vrrp_fini();
  72
  73         frr_fini();
  74
  75         exit(0);
  76 }
  77
  78 /* SIGUSR1 handler. */
  79 static void sigusr1(void)
  80 {
  81         zlog_rotate();
  82 }
  83
  84 struct frr_signal_t vrrp_signals[] = {
  85         {
  86                 .signal = SIGHUP,
  87                 .handler = &sighup,
  88         },
  89         {
  90                 .signal = SIGUSR1,
  91                 .handler = &sigusr1,
  92         },
  93         {
  94                 .signal = SIGINT,
  95                 .handler = &sigint,
  96         },
  97         {
  98                 .signal = SIGTERM,
  99                 .handler = &sigint,
 100         },
 101 };
 102
 103 static const struct frr_yang_module_info *const vrrp_yang_modules[] = {
 104         &frr_filter_info,
 105         &frr_vrf_info,
 106         &frr_interface_info,
 107         &frr_vrrpd_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                 }
 140         }
 141
 142         master = frr_init();
 143
 144         access_list_init();
 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 }