pim6_main.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * PIMv6 main()
 * Copyright (C) 2021  David Lamparter for NetDEF, Inc.
 * Copyright (C) 2008  Everton da Silva Marques (pim_main.c)
 */

#include <zebra.h>

#include "lib/vrf.h"
#include "lib/filter.h"
#include "lib/plist.h"
#include "lib/routemap.h"
#include "lib/routing_nb.h"

#include "lib/privs.h"
#include "lib/sigevent.h"
#include "lib/libfrr.h"
#include "lib/version.h"

#include "pimd.h"
#include "pim_instance.h"
#include "pim_errors.h"
#include "pim_iface.h"
#include "pim_zebra.h"
#include "pim_nb.h"
#include "pim6_cmd.h"
#include "pim6_mld.h"
#include "pim_zlookup.h"

zebra_capabilities_t _caps_p[] = {
	ZCAP_SYS_ADMIN,
	ZCAP_NET_ADMIN,
	ZCAP_NET_RAW,
	ZCAP_BIND,
};

/* pimd privileges to run with */
struct zebra_privs_t pimd_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 pim6_terminate(void);

static void pim6_sighup(void)
{
	zlog_info("SIGHUP received, ignoring");
}

static void pim6_sigint(void)
{
	zlog_notice("Terminating on signal SIGINT");
	pim6_terminate();
	exit(1);
}

static void pim6_sigterm(void)
{
	zlog_notice("Terminating on signal SIGTERM");
	pim6_terminate();
	exit(1);
}

static void pim6_sigusr1(void)
{
	zlog_rotate();
}

struct frr_signal_t pim6d_signals[] = {
	{
		.signal = SIGHUP,
		.handler = &pim6_sighup,
	},
	{
		.signal = SIGUSR1,
		.handler = &pim6_sigusr1,
	},
	{
		.signal = SIGINT,
		.handler = &pim6_sigint,
	},
	{
		.signal = SIGTERM,
		.handler = &pim6_sigterm,
	},
};

/* clang-format off */
static const struct frr_yang_module_info *const pim6d_yang_modules[] = {
	&frr_filter_info,
	&frr_interface_info,
	&frr_route_map_info,
	&frr_vrf_info,
	&frr_routing_info,
	&frr_pim_info,
	&frr_pim_rp_info,
	&frr_pim_candidate_info,
	&frr_gmp_info,
};

FRR_DAEMON_INFO(pim6d, PIM6,
	.vty_port = PIM6D_VTY_PORT,
	.proghelp = "Protocol Independent Multicast (RFC7761) for IPv6",

	.signals = pim6d_signals,
	.n_signals = array_size(pim6d_signals),

	.privs = &pimd_privs,

	.yang_modules = pim6d_yang_modules,
	.n_yang_modules = array_size(pim6d_yang_modules),
);
/* clang-format on */

int main(int argc, char **argv, char **envp)
{
	static struct option longopts[] = {
		{},
	};

	frr_preinit(&pim6d_di, argc, argv);
	frr_opt_add("", longopts, "");

	/* this while just reads the options */
	while (1) {
		int opt;

		opt = frr_getopt(argc, argv, NULL);

		if (opt == EOF)
			break;

		switch (opt) {
		case 0:
			break;
		default:
			frr_help_exit(1);
		}
	}

	pim_router_init();

	access_list_init();
	prefix_list_init();

	/*
	 * Initializations
	 */
	pim_error_init();
	pim_vrf_init();
#if 0
	prefix_list_add_hook(pim_prefix_list_update);
	prefix_list_delete_hook(pim_prefix_list_update);

	pim_route_map_init();
#endif
	pim_init();
	/*
	 * Initialize zclient "update" and "lookup" sockets
	 */
	pim_iface_init();

	gm_cli_init();

	pim_zebra_init();
#if 0
	pim_bfd_init();
	pim_mlag_init();
#endif

	hook_register(routing_conf_event,
		      routing_control_plane_protocols_name_validate);

	routing_control_plane_protocols_register_vrf_dependency();

	frr_config_fork();
	frr_run(router->master);

	/* never reached */
	return 0;
}

static void pim6_terminate(void)
{
	struct zclient *zclient;

	pim_vrf_terminate();
	pim_router_terminate();

	prefix_list_reset();
	access_list_reset();

	zclient = pim_zebra_zclient_get();
	if (zclient) {
		zclient_stop(zclient);
		zclient_free(zclient);
	}

	zclient_lookup_free();
	frr_fini();
}