igmp_receive.c

路由器协议平台igmp协议设计实现源码。

/*
 $Log:: /OEM Source Code/igmp/igmp_receive.c                                                       $
 * 
 * 1     4/23/98 9:53p Release Engineer
 * Initial release
 * IGMP v4.1.0
 */
/************************************************************************/
/*  Copyright (C) 1997-1998 RouterWare, Inc.                            */
/*  Unpublished - rights reserved under the Copyright Laws of the       */
/*  United States.  Use, duplication, or disclosure by the              */
/*  Government is subject to restrictions as set forth in               */
/*  subparagraph (c)(1)(ii) of the Rights in Technical Data and         */
/*  Computer Software clause at 252.227-7013.                           */
/*  RouterWare, Inc., 3961 MacArthur Blvd. Suite 212, Newport Beach, CA */
/************************************************************************/
#include "igmp.h"
/********************************************************************************************/
void igmp_receive_packet (IP_PARAMETERS *sptr_ip_parameters,void *sptr_igmp_received_packet,
	USHORT igmp_packet_size)
{
	IGMP_MESSAGE *sptr_igmp_message;
	UINT port;
	
	sptr_igmp_message = igmp_deserialize_received_message (sptr_ip_parameters, sptr_igmp_received_packet, igmp_packet_size);

	if (sptr_igmp_message == NULL)
		{
		return;
		}
	
	IGMP_PROTOCOL_TRACE (IGMP_TRACE, "IGMP: RECEIVED an IGMP message on port %u.\n", sptr_ip_parameters->rx_port_number);

	IGMP_PROTOCOL_TRACE_DISPLAY_MESSAGE (sptr_ip_parameters->source_address, sptr_ip_parameters->destination_address,
			sptr_igmp_message->type, sptr_igmp_message->max_response_time, sptr_igmp_message->group_ip_address);

	port = sptr_igmp_message->receiving_port;

	if (igmp.port_table[port].router_enabled == TRUE)
		{
		igmp_router_process_received_message (sptr_igmp_message);
		}

	if (igmp.port_table[port].host_enabled == TRUE)
		{
		igmp_host_process_received_message (sptr_igmp_message);
		}

	igmp_free_message (sptr_igmp_message);
}