frr/pimd/pim_nb_config.c

/*
 * Copyright (C) 2020 VmWare
 *                    Sarita Patra
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "pimd.h"
#include "pim_nb.h"
#include "lib/northbound_cli.h"
#include "pim_igmpv3.h"

void pim_if_membership_clear(struct interface *ifp);
void pim_if_membership_refresh(struct interface *ifp);

static bool is_pim_interface(const struct lyd_node *dnode)
{
	char if_xpath[XPATH_MAXLEN];
	const struct lyd_node *pim_enable_dnode;
	const struct lyd_node *igmp_enable_dnode;

	yang_dnode_get_path(dnode, if_xpath, sizeof(if_xpath));
	pim_enable_dnode = yang_dnode_get(dnode, "%s/frr-pim:pim/pim-enable",
					  if_xpath);
	igmp_enable_dnode = yang_dnode_get(dnode, "%s/frr-igmp:igmp/igmp-enable",
					   if_xpath);

	if (((pim_enable_dnode) &&
	     (yang_dnode_get_bool(pim_enable_dnode, "."))) ||
	     ((igmp_enable_dnode) &&
	     (yang_dnode_get_bool(igmp_enable_dnode, "."))))
		return true;

	return false;
}

static int pim_cmd_igmp_start(struct interface *ifp)
{
        struct pim_interface *pim_ifp;
        uint8_t need_startup = 0;

        pim_ifp = ifp->info;

        if (!pim_ifp) {
                (void)pim_if_new(ifp, true, false, false, false);
                need_startup = 1;
        } else {
                if (!PIM_IF_TEST_IGMP(pim_ifp->options)) {
                        PIM_IF_DO_IGMP(pim_ifp->options);
                        need_startup = 1;
                }
        }

        /* 'ip igmp' executed multiple times, with need_startup
         * avoid multiple if add all and membership refresh
         */
        if (need_startup) {
                pim_if_addr_add_all(ifp);
                pim_if_membership_refresh(ifp);
        }

        return NB_OK;
}

/*
 * CLI reconfiguration affects the interface level (struct pim_interface).
 * This function propagates the reconfiguration to every active socket
 * for that interface.
 */
static void igmp_sock_query_interval_reconfig(struct igmp_sock *igmp)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;

	zassert(igmp);

	/* other querier present? */

	if (igmp->t_other_querier_timer)
		return;

	/* this is the querier */

	zassert(igmp->interface);
	zassert(igmp->interface->info);

	ifp = igmp->interface;
	pim_ifp = ifp->info;

	if (PIM_DEBUG_IGMP_TRACE) {
		char ifaddr_str[INET_ADDRSTRLEN];

		pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str,
				sizeof(ifaddr_str));
		zlog_debug("%s: Querier %s on %s reconfig query_interval=%d",
				__func__, ifaddr_str, ifp->name,
				pim_ifp->igmp_default_query_interval);
	}

	/*
	 * igmp_startup_mode_on() will reset QQI:

	 * igmp->querier_query_interval = pim_ifp->igmp_default_query_interval;
	 */
	igmp_startup_mode_on(igmp);
}

static void igmp_sock_query_reschedule(struct igmp_sock *igmp)
{
	if (igmp->mtrace_only)
		return;

	if (igmp->t_igmp_query_timer) {
		/* other querier present */
		zassert(igmp->t_igmp_query_timer);
		zassert(!igmp->t_other_querier_timer);

		pim_igmp_general_query_off(igmp);
		pim_igmp_general_query_on(igmp);

		zassert(igmp->t_igmp_query_timer);
		zassert(!igmp->t_other_querier_timer);
	} else {
		/* this is the querier */

		zassert(!igmp->t_igmp_query_timer);
		zassert(igmp->t_other_querier_timer);

		pim_igmp_other_querier_timer_off(igmp);
		pim_igmp_other_querier_timer_on(igmp);

		zassert(!igmp->t_igmp_query_timer);
		zassert(igmp->t_other_querier_timer);
	}
}

static void change_query_interval(struct pim_interface *pim_ifp,
		int query_interval)
{
	struct listnode *sock_node;
	struct igmp_sock *igmp;

	pim_ifp->igmp_default_query_interval = query_interval;

	for (ALL_LIST_ELEMENTS_RO(pim_ifp->igmp_socket_list, sock_node, igmp)) {
		igmp_sock_query_interval_reconfig(igmp);
		igmp_sock_query_reschedule(igmp);
	}
}

static void change_query_max_response_time(struct pim_interface *pim_ifp,
		int query_max_response_time_dsec)
{
	struct listnode *sock_node;
	struct igmp_sock *igmp;

	pim_ifp->igmp_query_max_response_time_dsec =
		query_max_response_time_dsec;

	/*
	 * Below we modify socket/group/source timers in order to quickly
	 * reflect the change. Otherwise, those timers would args->eventually
	 * catch up.
	 */

	/* scan all sockets */
	for (ALL_LIST_ELEMENTS_RO(pim_ifp->igmp_socket_list, sock_node, igmp)) {
		struct listnode *grp_node;
		struct igmp_group *grp;

		/* reschedule socket general query */
		igmp_sock_query_reschedule(igmp);

		/* scan socket groups */
		for (ALL_LIST_ELEMENTS_RO(igmp->igmp_group_list, grp_node,
					grp)) {
			struct listnode *src_node;
			struct igmp_source *src;

			/* reset group timers for groups in EXCLUDE mode */
			if (grp->group_filtermode_isexcl)
				igmp_group_reset_gmi(grp);

			/* scan group sources */
			for (ALL_LIST_ELEMENTS_RO(grp->group_source_list,
						src_node, src)) {

				/* reset source timers for sources with running
				 * timers
				 */
				if (src->t_source_timer)
					igmp_source_reset_gmi(igmp, grp, src);
			}
		}
	}
}

int routing_control_plane_protocols_name_validate(
	struct nb_cb_create_args *args)
{
	const char *name;

	name = yang_dnode_get_string(args->dnode, "./name");
	if (!strmatch(name, "pim")) {
		snprintf(args->errmsg, args->errmsg_len,
				"pim supports only one instance with name pimd");
		return NB_ERR_VALIDATION;
	}
	return NB_OK;
}

/*
 * XPath: /frr-pim:pim/packets
 */
int pim_packets_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-pim:pim/join-prune-interval
 */
int pim_join_prune_interval_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-pim:pim/register-suppress-time
 */
int pim_register_suppress_time_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/ecmp
 */
int routing_control_plane_protocols_control_plane_protocol_pim_ecmp_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/ecmp-rebalance
 */
int routing_control_plane_protocols_control_plane_protocol_pim_ecmp_rebalance_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/keep-alive-timer
 */
int routing_control_plane_protocols_control_plane_protocol_pim_keep_alive_timer_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/rp-keep-alive-timer
 */
int routing_control_plane_protocols_control_plane_protocol_pim_rp_keep_alive_timer_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/send-v6-secondary
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_send_v6_secondary_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_send_v6_secondary_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/spt-switchover/spt-action
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_spt_switchover_spt_action_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/spt-switchover/spt-infinity-prefix-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_spt_switchover_spt_infinity_prefix_list_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_spt_switchover_spt_infinity_prefix_list_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/ssm-prefix-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_ssm_prefix_list_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_ssm_prefix_list_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/ssm-pingd-source-ip
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_ssm_pingd_source_ip_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_ssm_pingd_source_ip_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-group
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-group/mesh-group-name
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_mesh_group_name_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_mesh_group_name_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-group/member-ip
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_member_ip_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_member_ip_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-group/source-ip
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_source_ip_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_mesh_group_source_ip_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-peer
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_peer_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_peer_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-peer/source-ip
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_peer_source_ip_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_msdp_peer_source_ip_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/mlag
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/mlag/peerlink-rif
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_peerlink_rif_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_peerlink_rif_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/mlag/reg-address
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_reg_address_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_reg_address_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/mlag/my-role
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_my_role_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/mlag/peer-state
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mlag_peer_state_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/register-accept-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_register_accept_list_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_register_accept_list_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim
 */
int lib_interface_pim_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/pim-enable
 */
int lib_interface_pim_pim_enable_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/hello-interval
 */
int lib_interface_pim_hello_interval_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/hello-holdtime
 */
int lib_interface_pim_hello_holdtime_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_hello_holdtime_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/bfd
 */
int lib_interface_pim_bfd_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_bfd_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/bfd/min-rx-interval
 */
int lib_interface_pim_bfd_min_rx_interval_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/bfd/min-tx-interval
 */
int lib_interface_pim_bfd_min_tx_interval_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/bfd/detect_mult
 */
int lib_interface_pim_bfd_detect_mult_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/bsm
 */
int lib_interface_pim_bsm_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/unicast-bsm
 */
int lib_interface_pim_unicast_bsm_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/active-active
 */
int lib_interface_pim_active_active_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/dr-priority
 */
int lib_interface_pim_dr_priority_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/address-family
 */
int lib_interface_pim_address_family_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_address_family_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/address-family/use-source
 */
int lib_interface_pim_address_family_use_source_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_address_family_use_source_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/address-family/multicast-boundary-oil
 */
int lib_interface_pim_address_family_multicast_boundary_oil_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_address_family_multicast_boundary_oil_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/address-family/mroute
 */
int lib_interface_pim_address_family_mroute_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_address_family_mroute_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-pim:pim/address-family/mroute/oif
 */
int lib_interface_pim_address_family_mroute_oif_modify(struct nb_cb_modify_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

int lib_interface_pim_address_family_mroute_oif_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		/* TODO: implement me. */
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/frr-pim-rp:rp/static-rp/rp-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_create(struct nb_cb_create_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_destroy(struct nb_cb_destroy_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/frr-pim-rp:rp/static-rp/rp-list/group-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_group_list_create(struct nb_cb_create_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_group_list_destroy(struct nb_cb_destroy_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

/*
 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/frr-pim-rp:rp/static-rp/rp-list/prefix-list
 */
int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_prefix_list_modify(struct nb_cb_modify_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

int routing_control_plane_protocols_control_plane_protocol_pim_address_family_rp_static_rp_rp_list_prefix_list_destroy(struct nb_cb_destroy_args *args)
{
        switch (args->event) {
        case NB_EV_VALIDATE:
        case NB_EV_PREPARE:
        case NB_EV_ABORT:
        case NB_EV_APPLY:
                /* TODO: implement me. */
                break;
        }

        return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp
 */
int lib_interface_igmp_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		break;
	}

	return NB_OK;
}

int lib_interface_igmp_destroy(struct nb_cb_destroy_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;

		if (!pim_ifp)
			return NB_OK;

		PIM_IF_DONT_IGMP(pim_ifp->options);

		pim_if_membership_clear(ifp);

		pim_if_addr_del_all_igmp(ifp);

		if (!PIM_IF_TEST_PIM(pim_ifp->options))
			pim_if_delete(ifp);
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/igmp-enable
 */
int lib_interface_igmp_igmp_enable_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	bool igmp_enable;
	struct pim_interface *pim_ifp;
	int mcast_if_count;
	const char *ifp_name;
	const struct lyd_node *if_dnode;

	switch (args->event) {
	case NB_EV_VALIDATE:
		if_dnode = yang_dnode_get_parent(args->dnode, "interface");
		ifp_name = yang_dnode_get_string(if_dnode, ".");
		mcast_if_count =
			yang_get_list_elements_count(if_dnode);
		/* Limiting mcast interfaces to number of VIFs */
		if (mcast_if_count == MAXVIFS) {
			snprintf(args->errmsg, args->errmsg_len,
					"Max multicast interfaces(%d) Reached. Could not enable IGMP on interface %s",
					MAXVIFS, ifp_name);
			return NB_ERR_VALIDATION;
		}
		break;
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		igmp_enable = yang_dnode_get_bool(args->dnode, NULL);

		if (igmp_enable)
			return pim_cmd_igmp_start(ifp);

		else {
			pim_ifp = ifp->info;

			if (!pim_ifp)
				return NB_ERR_INCONSISTENCY;

			PIM_IF_DONT_IGMP(pim_ifp->options);

			pim_if_membership_clear(ifp);

			pim_if_addr_del_all_igmp(ifp);

			if (!PIM_IF_TEST_PIM(pim_ifp->options))
				pim_if_delete(ifp);
		}
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/version
 */
int lib_interface_igmp_version_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;
	int igmp_version, old_version = 0;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;

		if (!pim_ifp)
			return NB_ERR_INCONSISTENCY;

		igmp_version = yang_dnode_get_uint8(args->dnode, NULL);
		old_version = pim_ifp->igmp_version;
		pim_ifp->igmp_version = igmp_version;

		old_version = igmp_version;

		/* Current and new version is different refresh existing
		 * membership. Going from 3 -> 2 or 2 -> 3.
		 */
		if (old_version != igmp_version)
			pim_if_membership_refresh(ifp);

		break;
	}

	return NB_OK;
}

int lib_interface_igmp_version_destroy(struct nb_cb_destroy_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;
		pim_ifp->igmp_version = IGMP_DEFAULT_VERSION;
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/query-interval
 */
int lib_interface_igmp_query_interval_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;
	int query_interval;
	int query_interval_dsec;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;
		query_interval = yang_dnode_get_uint16(args->dnode, NULL);
		query_interval_dsec = 10 * query_interval;
		if (query_interval_dsec <=
				pim_ifp->igmp_query_max_response_time_dsec) {
			snprintf(args->errmsg, args->errmsg_len,
					"Can't set general query interval %d dsec <= query max response time %d dsec.",
					query_interval_dsec,
					pim_ifp->igmp_query_max_response_time_dsec);
			return NB_ERR_INCONSISTENCY;
		}
		change_query_interval(pim_ifp, query_interval);
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/query-max-response-time
 */
int lib_interface_igmp_query_max_response_time_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;
	int query_max_response_time_dsec;
	int default_query_interval_dsec;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;
		query_max_response_time_dsec =
			yang_dnode_get_uint8(args->dnode, NULL);
		default_query_interval_dsec =
			10 * pim_ifp->igmp_default_query_interval;

		if (query_max_response_time_dsec
				>= default_query_interval_dsec) {
			snprintf(args->errmsg, args->errmsg_len,
					"Can't set query max response time %d sec >= general query interval %d sec",
					query_max_response_time_dsec,
					pim_ifp->igmp_default_query_interval);
			return NB_ERR_INCONSISTENCY;
		}

		change_query_max_response_time(pim_ifp,
				query_max_response_time_dsec);
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/last-member-query-interval
 */
int lib_interface_igmp_last_member_query_interval_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;
	int last_member_query_interval;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;
		last_member_query_interval = yang_dnode_get_uint8(args->dnode,
				NULL);
		pim_ifp->igmp_specific_query_max_response_time_dsec =
			last_member_query_interval;

		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/robustness-variable
 */
int lib_interface_igmp_robustness_variable_modify(struct nb_cb_modify_args *args)
{
	struct interface *ifp;
	struct pim_interface *pim_ifp;
	int last_member_query_count;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		pim_ifp = ifp->info;
		last_member_query_count = yang_dnode_get_uint8(args->dnode,
				NULL);
		pim_ifp->igmp_last_member_query_count = last_member_query_count;

		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/address-family
 */
int lib_interface_igmp_address_family_create(struct nb_cb_create_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		break;
	}

	return NB_OK;
}

int lib_interface_igmp_address_family_destroy(struct nb_cb_destroy_args *args)
{
	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
	case NB_EV_APPLY:
		break;
	}

	return NB_OK;
}

/*
 * XPath: /frr-interface:lib/interface/frr-igmp:igmp/address-family/static-group
 */
int lib_interface_igmp_address_family_static_group_create(struct nb_cb_create_args *args)
{
	struct interface *ifp;
	struct ipaddr source_addr;
	struct ipaddr group_addr;
	int result;
	const char *ifp_name;
	const struct lyd_node *if_dnode;

	switch (args->event) {
	case NB_EV_VALIDATE:
		if_dnode =  yang_dnode_get_parent(args->dnode, "interface");
		if (!is_pim_interface(if_dnode)) {
			ifp_name = yang_dnode_get_string(if_dnode, ".");
			snprintf(args->errmsg, args->errmsg_len,
					"multicast not enabled on interface %s",
					ifp_name);
			return NB_ERR_VALIDATION;
		}
		break;
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		yang_dnode_get_ip(&source_addr, args->dnode, "./source-addr");
		yang_dnode_get_ip(&group_addr, args->dnode, "./group-addr");

		result = pim_if_igmp_join_add(ifp, group_addr.ip._v4_addr,
				source_addr.ip._v4_addr);
		if (result) {
			snprintf(args->errmsg, args->errmsg_len,
					"Failure joining IGMP group");
			return NB_ERR_INCONSISTENCY;
		}
	}

	return NB_OK;
}

int lib_interface_igmp_address_family_static_group_destroy(struct nb_cb_destroy_args *args)
{
	struct interface *ifp;
	struct ipaddr source_addr;
	struct ipaddr group_addr;
	int result;

	switch (args->event) {
	case NB_EV_VALIDATE:
	case NB_EV_PREPARE:
	case NB_EV_ABORT:
		break;
	case NB_EV_APPLY:
		ifp = nb_running_get_entry(args->dnode, NULL, true);
		yang_dnode_get_ip(&source_addr, args->dnode, "./source-addr");
		yang_dnode_get_ip(&group_addr, args->dnode, "./group-addr");

		result = pim_if_igmp_join_del(ifp, group_addr.ip._v4_addr,
				source_addr.ip._v4_addr);

		if (result) {
			char src_str[INET_ADDRSTRLEN];
			char grp_str[INET_ADDRSTRLEN];

			ipaddr2str(&source_addr, src_str, sizeof(src_str));
			ipaddr2str(&group_addr, grp_str, sizeof(grp_str));

			snprintf(args->errmsg, args->errmsg_len,
					"%% Failure leaving IGMP group %s %s on interface %s: %d",
					src_str, grp_str, ifp->name, result);

			return NB_ERR_INCONSISTENCY;
		}

		break;
	}

	return NB_OK;
}