private void btnPing_Click(object sender, EventArgs e)
{
listBoxPing.Items.Clear();
string host = txtBoxPing.Text;
if (host == "")
{
MessageBox.Show("IP地址不能为空");
return;
}
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
socket.ReceiveTimeout = 2000;
IPHostEntry iphostentry;
try
{
iphostentry = Dns.GetHostEntry(host);
}
catch (Exception)
{
listBoxPing.Items.Add("无法识别主机!");
return;
}
EndPoint hostpoint = (EndPoint) new IPEndPoint(iphostentry.AddressList[0], 0);
int DataSize = 4;
int PacketSize = DataSize + 8;
const int Icmp_type = 8;
ICMPPacket packet = new ICMPPacket(Icmp_type, 0, 0, 45, 0, DataSize);
Byte[] Buffer = new Byte[PacketSize];
int index = packet.CountByte(Buffer);
if (index != PacketSize)
{
listBoxPing.Items.Add("报文错误!");
return;
}
int CKsum_buffer_length = (int)Math.Ceiling((Double)index / 2);
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(Buffer, Icmp_header_buffer_index);
Icmp_header_buffer_index += 2;
}
packet.CheckSum = ICMPPacket.SumOfCheck(CKsum_buffer);
Byte[] SendData = new Byte[PacketSize];
index = packet.CountByte(SendData);
if (index != PacketSize)
{
listBoxPing.Items.Add("报文出错");
return;
}
int pingNum = 4;
listBoxPing.Items.Add("正在ping " + host + " [" + iphostentry.AddressList[0].ToString() + "]");
for (int i = 0; i < 4; i++)
{
int Nbytes = 0;
int startTime = Environment.TickCount;
try
{
Nbytes = socket.SendTo(SendData, PacketSize, SocketFlags.None, hostpoint);
}
catch (Exception)
{
listBoxPing.Items.Add("报文传送失败!");
return;
}
Byte[] ReceiveData = new Byte[256];
Nbytes = 0;
int TimeConsume = 0;
while (true)
{
try
{
Nbytes = socket.ReceiveFrom(ReceiveData, 256, SocketFlags.None, ref hostpoint);
}
catch (Exception)
{
listBoxPing.Items.Add("响应超时!");
break;
}
if (Nbytes > 0)
{
TimeConsume = System.Environment.TickCount - startTime;
if (TimeConsume < 1)
{
listBoxPing.Items.Add("reply from: " + iphostentry.AddressList[0].ToString() + " Send: " + (PacketSize + 20).ToString() + " time<1ms;bytes Received " + Nbytes.ToString());
}
else
{
listBoxPing.Items.Add("reply from: " + iphostentry.AddressList[0].ToString() + " Send: " + (PacketSize + 20).ToString() + " In " + TimeConsume.ToString() + "ms;bytes Received " + Nbytes.ToString());
}
break;
}
}
}
socket.Close();
}
