/// <summary>
/// This method get the Packet and calculates the total size
/// of the Pack by converting it to byte array
/// </summary>
public static 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);
}
/// <summary>
/// This method get the Packet and calculates the total size
/// of the Pack by converting it to byte array
/// </summary>
public static 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;
}
/// <summary>
/// This method takes the "hostname" of the server
/// and then it ping's it and shows the response time
/// </summary>
public static PingResponse PingHost(string host)
{
//Declare the IPHostEntry
PingResponse pr = new PingResponse();
IPHostEntry serverHE, fromHE;
int nBytes = 0;
int dwStart = 0, dwStop = 0;
//Initilize a Socket of the Type ICMP
Socket socket= new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
// Get the server endpoint
try {
serverHE = System.Net.Dns.GetHostByName(host);
}
catch(Exception) {
pr.Error="Host not found"; // fail
pr.HasError=true;
return pr;
}
// Convert the server IP_EndPoint to an EndPoint
IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList[0], 0);
EndPoint epServer = (ipepServer);
pr.Host=epServer.ToString();
// Set the receiving endpoint to the client machine
fromHE = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName());
IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);
EndPoint EndPointFrom = (ipEndPointFrom);
int PacketSize = 0;
IcmpPacket packet = new IcmpPacket();
// Construct the packet to send
packet.Type = ICMP_ECHO; //8
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];
//Initilize the Packet.Data
for (int i = 0; i < PingData; i++) {
packet.Data[i] = (byte)'#';
}
//Variable to hold the total Packet size
PacketSize = PingData + 8;
Byte [] icmp_pkt_buffer = new Byte[ PacketSize ];
Int32 Index = 0;
//Call a Methos Serialize which counts
//The total number of Bytes in the Packet
Index = Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData );
//Error in Packet Size
if( Index == -1 ) {
pr.Error="Error in Making Packet"; // fail
pr.HasError=true;
return pr;
}
// now get this critter into a UInt16 array
//Get the Half size of the Packet
Double double_length = Convert.ToDouble(Index);
Double dtemp = Math.Ceiling( double_length / 2);
int cksum_buffer_length = Convert.ToInt32(dtemp);
//Create a Byte Array
UInt16 [] cksum_buffer = new UInt16[cksum_buffer_length];
//Code to initilize the Uint16 array
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;
}
//Call a method which will return a checksum
UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
//Save the checksum to the Packet
packet.CheckSum = u_cksum;
// Now that we have the checksum, serialize the packet again
Byte [] sendbuf = new Byte[ PacketSize ];
//again check the packet size
Index = Serialize(
packet,
sendbuf,
PacketSize,
PingData );
//if there is a error report it
if( Index == -1 ) {
pr.Error="Error in Making Packet"; // fail
pr.HasError=true;
return pr;
}
dwStart = System.Environment.TickCount; // Start timing
//send the Pack over the socket
if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR) {
return null;
}
// 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;
//Receive the bytes
recd =false ;
int timeout=0 ;
//loop for checking the time of the server responding
StateObject stateObject = new StateObject(256, socket);
System.IAsyncResult asyncReceive = socket.BeginReceiveFrom(stateObject.sBuffer, 0, stateObject.sBuffer.Length, System.Net.Sockets.SocketFlags.None, ref EndPointFrom, new System.AsyncCallback(ReceiveFromCallBack),stateObject);
writeDot(asyncReceive);
while(timeout<=Timeout && !recd) {//go only for 10 seconds
System.Threading.Thread.Sleep(1000);
timeout++;
}
if(recd) {
if(stateObject.sBuffer.Length>0) {
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration=dwStop;
pr.BytesReceived=stateObject.sBuffer.Length;
pr.HasError=false;
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
} else {
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration=dwStop;
pr.BytesReceived=0;
pr.HasError=true;
pr.Error="Time Out";
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
}
} else {
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration=dwStop;
pr.BytesReceived=0;
pr.HasError=true;
pr.Error="Time Out";
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
}
recd=false;
#region old
/*
while(!recd) {
nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);
if (nBytes == SOCKET_ERROR) {
pr.BytesReceived=nBytes;
pr.Duration=dwStop;
pr.HasError=true;
pr.Error="Host not Responding";
recd=true ;
break;
}
else if(nBytes>0) {
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration=dwStop;
pr.BytesReceived=nBytes;
pr.HasError=false;
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
recd=true;
break;
}
timeout=System.Environment.TickCount - dwStart;
if(timeout>1000) {
pr.BytesReceived=nBytes;
pr.Duration=dwStop;
pr.HasError=true;
pr.Error="Time Out";
//Console.WriteLine("Time Out") ;
recd=true;
break;
}
}
*/
#endregion
//close the socket
socket.Close();
return pr;
}
/// <summary>
/// This method takes the "hostname" of the server
/// and then it ping's it and shows the response time
/// </summary>
public static PingResponse PingHost(string host)
{
//Declare the IPHostEntry
PingResponse pr = new PingResponse();
IPHostEntry serverHE, fromHE;
int nBytes = 0;
int dwStart = 0, dwStop = 0;
//Initilize a Socket of the Type ICMP
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
// Get the server endpoint
try {
serverHE = System.Net.Dns.GetHostByName(host);
}
catch (Exception) {
pr.Error = "Host not found"; // fail
pr.HasError = true;
return(pr);
}
// Convert the server IP_EndPoint to an EndPoint
IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList[0], 0);
EndPoint epServer = (ipepServer);
pr.Host = epServer.ToString();
// Set the receiving endpoint to the client machine
fromHE = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName());
IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);
EndPoint EndPointFrom = (ipEndPointFrom);
int PacketSize = 0;
IcmpPacket packet = new IcmpPacket();
// Construct the packet to send
packet.Type = ICMP_ECHO; //8
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];
//Initilize the Packet.Data
for (int i = 0; i < PingData; i++)
{
packet.Data[i] = (byte)'#';
}
//Variable to hold the total Packet size
PacketSize = PingData + 8;
Byte [] icmp_pkt_buffer = new Byte[PacketSize];
Int32 Index = 0;
//Call a Methos Serialize which counts
//The total number of Bytes in the Packet
Index = Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData);
//Error in Packet Size
if (Index == -1)
{
pr.Error = "Error in Making Packet"; // fail
pr.HasError = true;
return(pr);
}
// now get this critter into a UInt16 array
//Get the Half size of the Packet
Double double_length = Convert.ToDouble(Index);
Double dtemp = Math.Ceiling(double_length / 2);
int cksum_buffer_length = Convert.ToInt32(dtemp);
//Create a Byte Array
UInt16 [] cksum_buffer = new UInt16[cksum_buffer_length];
//Code to initilize the Uint16 array
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;
}
//Call a method which will return a checksum
UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
//Save the checksum to the Packet
packet.CheckSum = u_cksum;
// Now that we have the checksum, serialize the packet again
Byte [] sendbuf = new Byte[PacketSize];
//again check the packet size
Index = Serialize(
packet,
sendbuf,
PacketSize,
PingData);
//if there is a error report it
if (Index == -1)
{
pr.Error = "Error in Making Packet"; // fail
pr.HasError = true;
return(pr);
}
dwStart = System.Environment.TickCount; // Start timing
//send the Pack over the socket
if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR)
{
return(null);
}
// 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;
//Receive the bytes
recd = false;
int timeout = 0;
//loop for checking the time of the server responding
StateObject stateObject = new StateObject(256, socket);
System.IAsyncResult asyncReceive = socket.BeginReceiveFrom(stateObject.sBuffer, 0, stateObject.sBuffer.Length, System.Net.Sockets.SocketFlags.None, ref EndPointFrom, new System.AsyncCallback(ReceiveFromCallBack), stateObject);
writeDot(asyncReceive);
while (timeout <= Timeout && !recd) //go only for 10 seconds
{
System.Threading.Thread.Sleep(1000);
timeout++;
}
if (recd)
{
if (stateObject.sBuffer.Length > 0)
{
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration = dwStop;
pr.BytesReceived = stateObject.sBuffer.Length;
pr.HasError = false;
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
}
else
{
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration = dwStop;
pr.BytesReceived = 0;
pr.HasError = true;
pr.Error = "Time Out";
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
}
}
else
{
dwStop = System.Environment.TickCount - dwStart; // stop timing
pr.Duration = dwStop;
pr.BytesReceived = 0;
pr.HasError = true;
pr.Error = "Time Out";
//Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
}
recd = false;
#region old
/*
* while(!recd) {
*
* nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);
* if (nBytes == SOCKET_ERROR) {
* pr.BytesReceived=nBytes;
* pr.Duration=dwStop;
* pr.HasError=true;
* pr.Error="Host not Responding";
* recd=true ;
* break;
* }
* else if(nBytes>0) {
* dwStop = System.Environment.TickCount - dwStart; // stop timing
* pr.Duration=dwStop;
* pr.BytesReceived=nBytes;
* pr.HasError=false;
* //Console.WriteLine("Reply from "+epServer.ToString()+" in "+dwStop+"MS :Bytes Received"+nBytes);
* recd=true;
* break;
* }
* timeout=System.Environment.TickCount - dwStart;
* if(timeout>1000) {
* pr.BytesReceived=nBytes;
* pr.Duration=dwStop;
* pr.HasError=true;
* pr.Error="Time Out";
* //Console.WriteLine("Time Out") ;
* recd=true;
* break;
* }
*
* }
*/
#endregion
//close the socket
socket.Close();
return(pr);
}
