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// SPDX-License-Identifier: GPL-2.0-or-later
/* NHRP daemon main functions
* Copyright (c) 2014-2015 Timo Teräs
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include "zebra.h"
#include "privs.h"
#include "getopt.h"
#include "frrevent.h"
#include "sigevent.h"
#include "lib/version.h"
#include "log.h"
#include "memory.h"
#include "command.h"
#include "libfrr.h"
#include "filter.h"
#include "nhrpd.h"
#include "nhrp_errors.h"
DEFINE_MGROUP(NHRPD, "NHRP");
unsigned int debug_flags = 0;
struct event_loop *master;
struct timeval current_time;
/* nhrpd options. */
struct option longopts[] = {{0}};
/* nhrpd privileges */
static zebra_capabilities_t _caps_p[] = {
ZCAP_NET_RAW, ZCAP_NET_ADMIN,
ZCAP_DAC_OVERRIDE, /* for now needed to write to
/proc/sys/net/ipv4/<if>/send_redirect */
};
struct zebra_privs_t nhrpd_privs = {
#if defined(FRR_USER) && defined(FRR_GROUP)
.user = FRR_USER,
.group = FRR_GROUP,
#endif
#ifdef VTY_GROUP
.vty_group = VTY_GROUP,
#endif
.caps_p = _caps_p,
.cap_num_p = array_size(_caps_p),
.cap_num_i = 0
};
static void parse_arguments(int argc, char **argv)
{
int opt;
while (1) {
opt = frr_getopt(argc, argv, 0);
if (opt < 0)
break;
switch (opt) {
case 0:
break;
default:
frr_help_exit(1);
}
}
}
static void nhrp_sigusr1(void)
{
zlog_rotate();
}
static void nhrp_request_stop(void)
{
debugf(NHRP_DEBUG_COMMON, "Exiting...");
frr_early_fini();
nhrp_shortcut_terminate();
nhrp_nhs_terminate();
nhrp_zebra_terminate();
vici_terminate();
evmgr_terminate();
vrf_terminate();
nhrp_vc_terminate();
debugf(NHRP_DEBUG_COMMON, "Done.");
resolver_terminate();
frr_fini();
exit(0);
}
static struct frr_signal_t sighandlers[] = {
{
.signal = SIGUSR1,
.handler = &nhrp_sigusr1,
},
{
.signal = SIGINT,
.handler = &nhrp_request_stop,
},
{
.signal = SIGTERM,
.handler = &nhrp_request_stop,
},
};
static const struct frr_yang_module_info *const nhrpd_yang_modules[] = {
&frr_filter_info,
&frr_interface_info,
&frr_vrf_info,
};
/* clang-format off */
FRR_DAEMON_INFO(nhrpd, NHRP,
.vty_port = NHRP_VTY_PORT,
.proghelp = "Implementation of the NHRP routing protocol.",
.signals = sighandlers,
.n_signals = array_size(sighandlers),
.privs = &nhrpd_privs,
.yang_modules = nhrpd_yang_modules,
.n_yang_modules = array_size(nhrpd_yang_modules),
);
/* clang-format on */
int main(int argc, char **argv)
{
frr_preinit(&nhrpd_di, argc, argv);
frr_opt_add("", longopts, "");
parse_arguments(argc, argv);
/* Library inits. */
master = frr_init();
nhrp_error_init();
vrf_init(NULL, NULL, NULL, NULL);
nhrp_interface_init();
resolver_init(master);
/*
* Run with elevated capabilities, as for all netlink activity
* we need privileges anyway.
* The assert is for clang SA code where it does
* not see the change function being set in lib
*/
assert(nhrpd_privs.change);
nhrpd_privs.change(ZPRIVS_RAISE);
evmgr_init();
nhrp_vc_init();
nhrp_packet_init();
vici_init();
hook_register_prio(if_real, 0, nhrp_ifp_create);
hook_register_prio(if_up, 0, nhrp_ifp_up);
hook_register_prio(if_down, 0, nhrp_ifp_down);
hook_register_prio(if_unreal, 0, nhrp_ifp_destroy);
nhrp_zebra_init();
nhrp_shortcut_init();
nhrp_config_init();
frr_config_fork();
frr_run(master);
return 0;
}
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