我已经开始做一些基本的网络编程了。
我使用TcpClient
和TcpListener
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?
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();
}