public Int32 Serialize(IcmpPacket packet, Byte [] Buffer, Int32 PacketSize, Int32 PingData)
{
Int32 cbReturn = 0;
//
// serialize the struct into the array
//
int Index = 0;
Byte [] b_type = new Byte[1];
b_type[0] = (packet.Type);
Byte [] b_code = new Byte[1];
b_code[0] = (packet.SubCode);
Byte [] b_cksum = BitConverter.GetBytes(packet.CheckSum);
Byte [] b_id = BitConverter.GetBytes(packet.Identifier);
Byte [] b_seq = BitConverter.GetBytes(packet.SequenceNumber);
// Console.WriteLine("Serialize type ");
Array.Copy(b_type, 0, Buffer, Index, b_type.Length);
Index += b_type.Length;
// Console.WriteLine("Serialize code ");
Array.Copy(b_code, 0, Buffer, Index, b_code.Length);
Index += b_code.Length;
// Console.WriteLine("Serialize cksum ");
Array.Copy(b_cksum, 0, Buffer, Index, b_cksum.Length);
Index += b_cksum.Length;
// Console.WriteLine("Serialize id ");
Array.Copy(b_id, 0, Buffer, Index, b_id.Length);
Index += b_id.Length;
Array.Copy(b_seq, 0, Buffer, Index, b_seq.Length);
Index += b_seq.Length;
// copy the data
Array.Copy(packet.Data, 0, Buffer, Index, PingData);
Index += PingData;
if (Index != PacketSize /* sizeof(IcmpPacket) */)
{
cbReturn = -1;
return(cbReturn);
}
cbReturn = Index;
return(cbReturn);
}
public int GetPingTime(string host)
{
int PingTime = 0;
IPHostEntry serverHE, fromHE;
int nBytes = 0;
int dwStart = 0, dwStop = 0;
IcmpPacket packet = new IcmpPacket();
if (host == null)
{
return -1;
}
Socket socket = new Socket(AddressFamily.AfINet, SocketType.SockRaw, ProtocolType.ProtICMP);
// Get the server endpoint
serverHE = DNS.GetHostByName(host);
if (serverHE == null) {
return -1; // fail
}
// Convert the server IP_EndPoint to an EndPoint
IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList[0], 0);
EndPoint epServer = (ipepServer);
// Set the receiving endpoint to the client machine
fromHE = DNS.GetHostByName(DNS.GetHostName());
IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);
EndPoint EndPointFrom = (ipEndPointFrom);
int PacketSize = 0;
for (int j = 0; j < 1; j++)
{
// Construct the packet to send
packet.Type = ICMP_ECHO;
packet.SubCode = 0;
packet.CheckSum = UInt16.Parse("0");
packet.Identifier = UInt16.Parse("45");
packet.SequenceNumber = UInt16.Parse("0");
int PingData = 32; // sizeof(IcmpPacket) - 8;
packet.Data = new Byte[PingData];
for (int i = 0; i < PingData; i++)
packet.Data[i] = (byte)'#';
PacketSize = PingData + 8;
//
// since we have to serialize the final byte array into a UInt16 array,
// let us make our life easy by making sure that the icmp_pkt_buffer
// byte array is of an even size ( > PacketSize ) if the size of the IcmpPacket
// is not even
//
if( PacketSize % 2 == 1 )
++PacketSize;
Byte [] icmp_pkt_buffer = new Byte[ PacketSize ];
Int32 Index = 0;
Index = Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData );
if( Index == -1 )
return -1;
//
// now get this critter into a UInt16 array
//
Double double_length = Convert.ToDouble(Index);
Double dtemp = Math.Ceil( double_length / 2);
int cksum_buffer_length = Convert.ToInt32(dtemp);
UInt16 [] cksum_buffer = new UInt16[cksum_buffer_length];
int icmp_header_buffer_index = 0;
for( int i = 0; i < cksum_buffer_length; i++ ) {
cksum_buffer[i] =
BitConverter.ToUInt16(icmp_pkt_buffer,icmp_header_buffer_index);
icmp_header_buffer_index += 2;
}
UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
packet.CheckSum = u_cksum;
// Now that we have the checksum, serialize the packet again
Byte [] sendbuf = new Byte[ PacketSize ];
Index = Serialize(
packet,
sendbuf,
PacketSize,
PingData );
if( Index == -1 )
return -1;
dwStart = System.Environment.TickCount; // Start timing
if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR) {
Console.WriteLine("Error calling sendto");
return -1; // fail
}
// Initialize the buffers. The receive buffer is the size of the
// ICMP header plus the IP header (20 bytes)
Byte [] ReceiveBuffer = new Byte[256];
nBytes = 0;
nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);
if (nBytes == SOCKET_ERROR)
{
dwStop = SOCKET_ERROR;
}
else
{
dwStop = System.Environment.TickCount - dwStart; // stop timing
}
}
socket.Close();
PingTime = (int)dwStop;
return PingTime;
}
public Int32 Serialize( IcmpPacket packet, Byte [] Buffer, Int32 PacketSize, Int32 PingData )
{
Int32 cbReturn = 0;
//
// serialize the struct into the array
//
int Index=0;
Byte [] b_type = new Byte[1];
b_type[0] = (packet.Type);
Byte [] b_code = new Byte[1];
b_code[0] = (packet.SubCode);
Byte [] b_cksum = BitConverter.GetBytes(packet.CheckSum);
Byte [] b_id = BitConverter.GetBytes(packet.Identifier);
Byte [] b_seq = BitConverter.GetBytes(packet.SequenceNumber);
// Console.WriteLine("Serialize type ");
Array.Copy( b_type, 0, Buffer, Index, b_type.Length );
Index += b_type.Length;
// Console.WriteLine("Serialize code ");
Array.Copy( b_code, 0, Buffer, Index, b_code.Length );
Index += b_code.Length;
// Console.WriteLine("Serialize cksum ");
Array.Copy( b_cksum, 0, Buffer, Index, b_cksum.Length );
Index += b_cksum.Length;
// Console.WriteLine("Serialize id ");
Array.Copy( b_id, 0, Buffer, Index, b_id.Length );
Index += b_id.Length;
Array.Copy( b_seq, 0, Buffer, Index, b_seq.Length );
Index += b_seq.Length;
// copy the data
Array.Copy( packet.Data, 0, Buffer, Index, PingData );
Index += PingData;
if( Index != PacketSize/* sizeof(IcmpPacket) */) {
cbReturn = -1;
return cbReturn;
}
cbReturn = Index;
return cbReturn;
}
public int GetPingTime(string host)
{
int PingTime = 0;
IPHostEntry serverHE, fromHE;
int nBytes = 0;
int dwStart = 0, dwStop = 0;
IcmpPacket packet = new IcmpPacket();
if (host == null)
{
return(-1);
}
Socket socket = new Socket(AddressFamily.AfINet, SocketType.SockRaw, ProtocolType.ProtICMP);
// Get the server endpoint
serverHE = DNS.GetHostByName(host);
if (serverHE == null)
{
return(-1); // fail
}
// Convert the server IP_EndPoint to an EndPoint
IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList[0], 0);
EndPoint epServer = (ipepServer);
// Set the receiving endpoint to the client machine
fromHE = DNS.GetHostByName(DNS.GetHostName());
IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);
EndPoint EndPointFrom = (ipEndPointFrom);
int PacketSize = 0;
for (int j = 0; j < 1; j++)
{
// Construct the packet to send
packet.Type = ICMP_ECHO;
packet.SubCode = 0;
packet.CheckSum = UInt16.Parse("0");
packet.Identifier = UInt16.Parse("45");
packet.SequenceNumber = UInt16.Parse("0");
int PingData = 32; // sizeof(IcmpPacket) - 8;
packet.Data = new Byte[PingData];
for (int i = 0; i < PingData; i++)
{
packet.Data[i] = (byte)'#';
}
PacketSize = PingData + 8;
//
// since we have to serialize the final byte array into a UInt16 array,
// let us make our life easy by making sure that the icmp_pkt_buffer
// byte array is of an even size ( > PacketSize ) if the size of the IcmpPacket
// is not even
//
if (PacketSize % 2 == 1)
{
++PacketSize;
}
Byte [] icmp_pkt_buffer = new Byte[PacketSize];
Int32 Index = 0;
Index = Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData);
if (Index == -1)
{
return(-1);
}
//
// now get this critter into a UInt16 array
//
Double double_length = Convert.ToDouble(Index);
Double dtemp = Math.Ceil(double_length / 2);
int cksum_buffer_length = Convert.ToInt32(dtemp);
UInt16 [] cksum_buffer = new UInt16[cksum_buffer_length];
int icmp_header_buffer_index = 0;
for (int i = 0; i < cksum_buffer_length; i++)
{
cksum_buffer[i] =
BitConverter.ToUInt16(icmp_pkt_buffer, icmp_header_buffer_index);
icmp_header_buffer_index += 2;
}
UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
packet.CheckSum = u_cksum;
// Now that we have the checksum, serialize the packet again
Byte [] sendbuf = new Byte[PacketSize];
Index = Serialize(
packet,
sendbuf,
PacketSize,
PingData);
if (Index == -1)
{
return(-1);
}
dwStart = System.Environment.TickCount; // Start timing
if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR)
{
Console.WriteLine("Error calling sendto");
return(-1); // fail
}
// Initialize the buffers. The receive buffer is the size of the
// ICMP header plus the IP header (20 bytes)
Byte [] ReceiveBuffer = new Byte[256];
nBytes = 0;
nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);
if (nBytes == SOCKET_ERROR)
{
dwStop = SOCKET_ERROR;
}
else
{
dwStop = System.Environment.TickCount - dwStart; // stop timing
}
}
socket.Close();
PingTime = (int)dwStop;
return(PingTime);
}
