diff options
Diffstat (limited to 'nuttx/net/uip/uip_mcastmac.c')
-rwxr-xr-x | nuttx/net/uip/uip_mcastmac.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/nuttx/net/uip/uip_mcastmac.c b/nuttx/net/uip/uip_mcastmac.c new file mode 100755 index 000000000..7795becab --- /dev/null +++ b/nuttx/net/uip/uip_mcastmac.c @@ -0,0 +1,132 @@ +/**************************************************************************** + * 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 */ |