C++ (Cpp) arp_packet_is_arp Examples

Example #1

File: arp.c Project: quahansudung/AVRnet_RF_Smarthome

//*******************************************************************************************
//
// Function : arp_who_is
// Description : send arp request to destination ip, and save destination mac to dest_mac.
// call this function to find the destination mac address before send other packet.
//
//*******************************************************************************************
BYTE arp_who_is ( BYTE *rxtx_buffer, BYTE *dest_mac, BYTE *dest_ip )
{
	BYTE i;
	WORD dlength;

	// send arp request packet to network
	arp_send_request ( rxtx_buffer, dest_ip );

	for ( i=0; i<10; i++ )
	{
		// Time out 10x10ms = 100ms
		_delay_ms ( 10 );
		dlength = enc28j60_packet_receive( rxtx_buffer, MAX_RXTX_BUFFER );

		// destination ip address was found on network
		if ( dlength )
		{
			if ( arp_packet_is_arp ( rxtx_buffer, (WORD_BYTES){ARP_OPCODE_REPLY_V} ) )
			{
				// copy destination mac address from arp reply packet to destination mac address
				memcpy ( dest_mac, &rxtx_buffer[ ETH_SRC_MAC_P ], sizeof(MAC_ADDR) );
				return 1;
			}
		}
	}
	
	// destination ip was not found on network
	return 0;
}

Example #2

File: main.c Project: TanND/Electronic

//*****************************************************************************************
//
// Function : server_process
// Description : Run web server and listen on port 80
//
//*****************************************************************************************
void server_process ( void )
{
	MAC_ADDR client_mac;
	IP_ADDR client_ip;
	// you can change rx,tx buffer size in includes.h
	BYTE rxtx_buffer[MAX_RXTX_BUFFER];
	WORD plen;
	
	if ( flag1.bits.syn_is_sent )
		return;
	// get new packet
	plen = enc28j60_packet_receive( (BYTE*)&rxtx_buffer, MAX_RXTX_BUFFER );
	
	//plen will ne unequal to zero if there is a valid packet (without crc error)
	if(plen==0)
		return;

	// copy client mac address from buffer to client mac variable
	memcpy ( (BYTE*)&client_mac, &rxtx_buffer[ ETH_SRC_MAC_P ], sizeof(MAC_ADDR) );
	
	// check arp packet if match with avr ip let's send reply
	if ( arp_packet_is_arp( rxtx_buffer, (WORD_BYTES){ARP_OPCODE_REQUEST_V} ) )
	{
		arp_send_reply ( (BYTE*)&rxtx_buffer, (BYTE*)&client_mac );
		return;
	}

	// get client ip address
	memcpy ( (BYTE*)&client_ip, &rxtx_buffer[ IP_SRC_IP_P ], sizeof(IP_ADDR) );
	// check ip packet send to avr or not?
	if ( ip_packet_is_ip ( (BYTE*)&rxtx_buffer ) == 0 )
	{
		return;
	}

	// check packet if packet is icmp packet let's send icmp echo reply
	if ( icmp_send_reply ( (BYTE*)&rxtx_buffer, (BYTE*)&client_mac, (BYTE*)&client_ip ) )
	{
		return;
	}
	
	// start web server at port 80, see http.c
	http_webserver_process ( (BYTE*)rxtx_buffer, (BYTE*)&client_mac, (BYTE*)&client_ip );
}