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132 lines
4.7 KiB
132 lines
4.7 KiB
/**************************************************************************** |
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* net/uip/uip_mcastmac.c |
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* |
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* Copyright (C) 2010 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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* |
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* The NuttX implementation of IGMP was inspired by the IGMP add-on for the |
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* lwIP TCP/IP stack by Steve Reynolds: |
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* |
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* Copyright (c) 2002 CITEL Technologies Ltd. |
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* All rights reserved. |
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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 <net/uip/uipopt.h> |
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#include <net/uip/uip.h> |
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#include "uip_internal.h" |
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#ifdef CONFIG_NET_IGMP |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: uip_mcastmac |
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* |
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* Description: |
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* Given an IP address (in network order), create a IGMP multicast MAC |
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* address. |
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* |
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****************************************************************************/ |
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static void uip_mcastmac(uip_ipaddr_t *ip, FAR uint8_t *mac) |
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{ |
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/* This mapping is from the IETF IN RFC 1700 */ |
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mac[0] = 0x01; |
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mac[1] = 0x00; |
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mac[2] = 0x5e; |
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mac[3] = ip4_addr2(*ip) & 0x7f; |
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mac[4] = ip4_addr3(*ip); |
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mac[5] = ip4_addr4(*ip); |
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nvdbg("IP: %08x -> MAC: %02x%02x%02x%02x%02x%02x\n", |
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*ip, 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: uip_addmcastmac |
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* |
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* Description: |
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* Add an IGMP MAC address to the device's MAC filter table. |
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* |
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****************************************************************************/ |
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void uip_addmcastmac(FAR struct uip_driver_s *dev, FAR uip_ipaddr_t *ip) |
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{ |
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uint8_t mcastmac[6]; |
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nvdbg("Adding: IP %08x\n", *ip); |
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if (dev->d_addmac) |
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{ |
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uip_mcastmac(ip, 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: uip_removemcastmac |
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* |
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* Description: |
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* Remove an IGMP MAC address from the device's MAC filter table. |
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* |
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****************************************************************************/ |
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void uip_removemcastmac(FAR struct uip_driver_s *dev, FAR uip_ipaddr_t *ip) |
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{ |
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uint8_t mcastmac[6]; |
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nvdbg("Removing: IP %08x\n", *ip); |
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if (dev->d_rmmac) |
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{ |
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uip_mcastmac(ip, 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_IGMP */
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