129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/****************************************************************************
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* net/mld/mld_mcastmac.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/net/mld.h>
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#include "devif/devif.h"
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#include "mld/mld.h"
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#ifdef CONFIG_NET_MLD
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mld_mcastmac
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*
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* Description:
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* Given an IP address (in network order), create a MLD multicast MAC
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* address.
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*
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****************************************************************************/
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static void mld_mcastmac(FAR const net_ipv6addr_t ipaddr, FAR uint8_t *mac)
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{
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FAR uint8_t *ipaddr8 = (FAR uint8_t *)ipaddr;
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mldinfo("Mcast IP: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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NTOHS(ipaddr[0]), NTOHS(ipaddr[1]), NTOHS(ipaddr[2]),
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NTOHS(ipaddr[3]), NTOHS(ipaddr[4]), NTOHS(ipaddr[5]),
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NTOHS(ipaddr[6]), NTOHS(ipaddr[7]));
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/* For the MAC address by insert the low 32 Bits of the multicast IPv6
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* Address into the Ethernet Address . This mapping is from the IETF
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* RFC 7042.
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*/
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mac[0] = 0x33;
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mac[1] = 0x33;
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mac[2] = ipaddr8[12]; /* Bits: 96-103 */
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mac[3] = ipaddr8[13]; /* Bits: 104-111 */
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mac[4] = ipaddr8[14]; /* Bits: 112-119 */
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mac[5] = ipaddr8[15]; /* Bits: 120-127 */
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mldinfo("Mcast MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mld_addmcastmac
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*
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* Description:
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* Add an MLD MAC address to the device's MAC filter table.
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*
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****************************************************************************/
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void mld_addmcastmac(FAR struct net_driver_s *dev,
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FAR const net_ipv6addr_t ipaddr)
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{
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uint8_t mcastmac[6];
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mldinfo("Adding MAC address filter\n");
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if (dev->d_addmac != NULL)
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{
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mld_mcastmac(ipaddr, mcastmac);
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dev->d_addmac(dev, mcastmac);
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}
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}
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/****************************************************************************
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* Name: mld_removemcastmac
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*
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* Description:
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* Remove an MLD MAC address from the device's MAC filter table.
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*
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****************************************************************************/
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void mld_removemcastmac(FAR struct net_driver_s *dev,
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FAR const net_ipv6addr_t ipaddr)
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{
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uint8_t mcastmac[6];
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mldinfo("Removing MAC address filter\n");
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if (dev->d_rmmac != NULL)
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{
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mld_mcastmac(ipaddr, mcastmac);
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dev->d_rmmac(dev, mcastmac);
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}
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}
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#endif /* CONFIG_NET_MLD */
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