forked from Archive/PX4-Autopilot
133 lines
4.5 KiB
C
Executable File
133 lines
4.5 KiB
C
Executable File
/****************************************************************************
|
|
* net/uip/uip_mcastmac.c
|
|
*
|
|
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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/uip/uipopt.h>
|
|
#include <nuttx/net/uip/uip.h>
|
|
|
|
#include "uip_internal.h"
|
|
|
|
#ifdef CONFIG_NET_IGMP
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: uip_mcastmac
|
|
*
|
|
* Description:
|
|
* Given an IP address (in network order), create a IGMP multicast MAC
|
|
* address.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void uip_mcastmac(uip_ipaddr_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);
|
|
|
|
nvdbg("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: uip_addmcastmac
|
|
*
|
|
* Description:
|
|
* Add an IGMP MAC address to the device's MAC filter table.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void uip_addmcastmac(FAR struct uip_driver_s *dev, FAR uip_ipaddr_t *ip)
|
|
{
|
|
uint8_t mcastmac[6];
|
|
|
|
nvdbg("Adding: IP %08x\n", *ip);
|
|
if (dev->d_addmac)
|
|
{
|
|
uip_mcastmac(ip, mcastmac);
|
|
dev->d_addmac(dev, mcastmac);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: uip_removemcastmac
|
|
*
|
|
* Description:
|
|
* Remove an IGMP MAC address from the device's MAC filter table.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void uip_removemcastmac(FAR struct uip_driver_s *dev, FAR uip_ipaddr_t *ip)
|
|
{
|
|
uint8_t mcastmac[6];
|
|
|
|
nvdbg("Removing: IP %08x\n", *ip);
|
|
if (dev->d_rmmac)
|
|
{
|
|
uip_mcastmac(ip, mcastmac);
|
|
dev->d_rmmac(dev, mcastmac);
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_NET_IGMP */
|