67d02a45eb
Most tools used for compliance and SBOM generation use SPDX identifiers This change brings us a step closer to an easy SBOM generation. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
92 lines
3.6 KiB
C
92 lines
3.6 KiB
C
/****************************************************************************
|
|
* net/mld/mld_done.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <assert.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/netstats.h>
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/mld.h>
|
|
|
|
#include "devif/devif.h"
|
|
#include "mld/mld.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: mld_done
|
|
*
|
|
* Description:
|
|
* Called from icmpv6_input() when a Multicast Listener Done is received.
|
|
*
|
|
* When a router in Querier state receives a Done message from a link,
|
|
* if the Multicast Address identified in the message is present in the
|
|
* Querier's list of addresses having listeners on that link, the Querier
|
|
* periodically sends multiple Multicast-Address-Specific Queries to that
|
|
* multicast address. If no Reports for the address are received from the
|
|
* link after the maximum response delay in the Multicast-Address-Specific
|
|
* Queries of the last query has passed, the routers on the link assume
|
|
* that the address no longer has any listeners there; the address is
|
|
* therefore deleted from the list and its disappearance is made known to
|
|
* the multicast routing component.
|
|
*
|
|
* Routers in Non-Querier state MUST ignore Done messages.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int mld_done(FAR struct net_driver_s *dev,
|
|
FAR const struct mld_mcast_listen_done_s *done)
|
|
{
|
|
mldinfo("Multicast Listener Done\n");
|
|
MLD_STATINCR(g_netstats.mld.done_received);
|
|
|
|
/* The Done message is sent to the link-local, all routers multicast
|
|
* address. We basically ignore the Done message:
|
|
*
|
|
* We cannot free the group if there are other members of the group. We
|
|
* know how many local tasks have joined the group, but we are less
|
|
* certain of how many non-local members of the group there are.
|
|
*
|
|
* The RFC requires that we send Multicast-Address-Specific Queries
|
|
* repeatedly before removing the group to assure that the no listeners
|
|
* are present.
|
|
*
|
|
* If we are the Querier, then the Query timer logic will accomplish
|
|
* this requirement for us. If there is another Querier on the subnet,
|
|
* it will drive the Queries. No Querier? We will let the 'Other
|
|
* Querier Present Timeout' handle that case.
|
|
*/
|
|
|
|
/* Need to set d_len to zero to indication that nothing is being sent */
|
|
|
|
dev->d_len = 0;
|
|
return OK;
|
|
}
|