請問板上有大大用過 SharpPcap 來產生 ICMP 的封包(要ping但欄位自填)然後用它的 NetworkDevice 來送出嗎??
我寫了一段程式想送出, 但是不知為何我用 WireShark 都沒看到封包有送出
icmp 封包看起來是沒有錯, 但是用 PcapSendPacket 無法傳出
我的程式碼如下 請大家幫忙看看好嗎??
// btnSebd 按紐按下後就會送出封包
private void btnSend_Click(object sender, EventArgs e)
{
btnSend.Enabled = false;
this.Cursor = Cursors.WaitCursor;
ICMPPacket p = GenPingPacket(tbxDstIP.Text, tbxDstMAC.Text, "192.168.0.30", "00-1A-6B-32-32-C0");
NetworkDevice NetDev = m_AllNetDevice[cbbNetworkDevices.SelectedIndex] as NetworkDevice;
NetDev.PcapOpen();
NetDev.PcapSendPacket(p);
NetDev.PcapClose();
this.Cursor = Cursors.Default;
btnSend.Enabled = true;
}
// 這一段是產生 ICMP 封包
public static ICMPPacket GenPingPacket(string dstIP, string dstMAC, string srcIP, string srcMAC)
{
int lLen = 4;
int ByteLen = 64;
ICMPPacket icmp = new ICMPPacket(lLen, new byte[ByteLen]);
icmp.EthernetProtocol = EthernetProtocols_Fields.IP;
icmp.DestinationHwAddress = dstMAC; //Set the dest MAC of the gateway
icmp.SourceHwAddress = srcMAC; //Set the source mac of the local device
//IP fields
icmp.DestinationAddress = dstIP; //The IP of the destination host
icmp.SourceAddress = srcIP; //The IP of the local device
icmp.IPProtocol = IPProtocols_Fields.ICMP;
icmp.TimeToLive = 64;
icmp.Id = 100;
icmp.Version = 4;
icmp.IPTotalLength = ByteLen - lLen; //Set the correct IP length
icmp.IPHeaderLength = IPFields_Fields.IP_HEADER_LEN;
icmp.ComputeIPChecksum(true);
icmp.ComputeICMPChecksum();
//ICMP fields
icmp.MessageCode = 0;
icmp.MessageType = 8;
icmp.MessageMajorCode = 8;
icmp.MessageMinorCode = 0;
icmp.ComputeICMPChecksum(true);
return icmp;
}