139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/****************************************************************************
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* net/mld/mld_mcastmac.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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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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ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3],
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ipaddr[4], ipaddr[5], ipaddr[6], 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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