123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130 |
- /****************************************************************************
- * net/igmp/igmp_mcastmac.c
- *
- * Copyright (C) 2010 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * The NuttX implementation of IGMP was inspired by the IGMP add-on for the
- * lwIP TCP/IP stack by Steve Reynolds:
- *
- * Copyright (c) 2002 CITEL Technologies Ltd.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <assert.h>
- #include <debug.h>
- #include <nuttx/net/netconfig.h>
- #include <nuttx/net/ip.h>
- #include <nuttx/net/igmp.h>
- #include "devif/devif.h"
- #include "igmp/igmp.h"
- #ifdef CONFIG_NET_IGMP
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: igmp_mcastmac
- *
- * Description:
- * Given an IP address (in network order), create a IGMP multicast MAC
- * address.
- *
- ****************************************************************************/
- static void igmp_mcastmac(in_addr_t *ip, FAR uint8_t *mac)
- {
- /* This mapping is from the IETF IN RFC 1700 */
- mac[0] = 0x01;
- mac[1] = 0x00;
- mac[2] = 0x5e;
- mac[3] = ip4_addr2(*ip) & 0x7f;
- mac[4] = ip4_addr3(*ip);
- mac[5] = ip4_addr4(*ip);
- ninfo("IP: %08x -> MAC: %02x%02x%02x%02x%02x%02x\n",
- *ip, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: igmp_addmcastmac
- *
- * Description:
- * Add an IGMP MAC address to the device's MAC filter table.
- *
- ****************************************************************************/
- void igmp_addmcastmac(FAR struct net_driver_s *dev, FAR in_addr_t *ip)
- {
- uint8_t mcastmac[6];
- ninfo("Adding: IP %08x\n", *ip);
- if (dev->d_addmac)
- {
- igmp_mcastmac(ip, mcastmac);
- dev->d_addmac(dev, mcastmac);
- }
- }
- /****************************************************************************
- * Name: igmp_removemcastmac
- *
- * Description:
- * Remove an IGMP MAC address from the device's MAC filter table.
- *
- ****************************************************************************/
- void igmp_removemcastmac(FAR struct net_driver_s *dev, FAR in_addr_t *ip)
- {
- uint8_t mcastmac[6];
- ninfo("Removing: IP %08x\n", *ip);
- if (dev->d_rmmac)
- {
- igmp_mcastmac(ip, mcastmac);
- dev->d_rmmac(dev, mcastmac);
- }
- }
- #endif /* CONFIG_NET_IGMP */
|