tcp / ip数据包监听器

时间:2012-03-13 19:17:14

标签: c# network-programming sharppcap

我已经开始做一些基本的网络编程了。

我使用TcpClientTcpListener读取/编写了我自己的程序,并且运行正常。

但是,我正在处理的应用程序现在的工作方式略有不同。

我想设置一个程序来监听tcp / ip数据包,而不必连接。

例如,让数据包发送应用程序使用相应的ip add和端口号向我的程序发送数据包。

我也研究过使用Sharppcap和packet.net但是我发现的所有示例只能在本地找到的设备上侦听(没有机会设置端口号和ip add等参数)。

有没有人建议如何做到这一点?

1 个答案:

答案 0 :(得分:2)

您应该考虑使用UDP协议而不是TCP / IP。

http://en.wikipedia.org/wiki/User_Datagram_Protocol

以下是客户端的代码:

using System.Net;
using System.Net.Sockets;

...

/// <summary>
/// Sends a sepcified number of UDP packets to a host or IP Address.
/// </summary>
/// <param name="hostNameOrAddress">The host name or an IP Address to which the UDP packets will be sent.</param>
/// <param name="destinationPort">The destination port to which the UDP packets will be sent.</param>
/// <param name="data">The data to send in the UDP packet.</param>
/// <param name="count">The number of UDP packets to send.</param>
public static void SendUDPPacket(string hostNameOrAddress, int destinationPort, string data, int count)
{
    // Validate the destination port number
    if (destinationPort < 1 || destinationPort > 65535)
        throw new ArgumentOutOfRangeException("destinationPort", "Parameter destinationPort must be between 1 and 65,535.");

    // Resolve the host name to an IP Address
    IPAddress[] ipAddresses = Dns.GetHostAddresses(hostNameOrAddress);
    if (ipAddresses.Length == 0)
        throw new ArgumentException("Host name or address could not be resolved.", "hostNameOrAddress");

    // Use the first IP Address in the list
    IPAddress destination = ipAddresses[0];            
    IPEndPoint endPoint = new IPEndPoint(destination, destinationPort);
    byte[] buffer = Encoding.ASCII.GetBytes(data);

    // Send the packets
    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);           
    for(int i = 0; i < count; i++)
        socket.SendTo(buffer, endPoint);
    socket.Close();            
}