Socket programmer:
Tcp
Code:
/*----------------------------------------------------------*/
//CopyRight @ WWW.cnblogs.com
//Simple Tcp Client.
//Leo.wl
//2010-09-25
//qq:382448649
/*---------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace TcpClient
{
class Program
{
[STAThread]
static void Main(string[] args)
{
//
//TODO:start
//
byte[] data = new byte[1024];
Socket newclient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
Console.Write("please input the server ip:");
string ipadd = Console.ReadLine();
Console.WriteLine();
Console.Write("please input the server port:");
int port = Convert.ToInt32(Console.ReadLine());
IPEndPoint ie = new IPEndPoint(IPAddress.Parse(ipadd), port);//服务器的IP和端口
try
{
//因为客户端只是用来向特定的服务器发送信息，所以不需要绑定本机的IP和端口。不需要监听。
newclient.Connect(ie);
}
catch (SocketException e)
{
Console.WriteLine("unable to connect to server");
Console.WriteLine(e.ToString());
return;
}
int recv = newclient.Receive(data);
string stringdata = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine(stringdata);
while (true)
{
string input = Console.ReadLine();
if (input == "exit")
break;
newclient.Send(Encoding.ASCII.GetBytes(input));
data = new byte[1024];
recv = newclient.Receive(data);
stringdata = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine(stringdata);
}
Console.WriteLine("disconnect from sercer");
newclient.Shutdown(SocketShutdown.Both);
newclient.Close();
}
}
}
/*----------------------------------------------------------*/
//CopyRight @ WWW.cnblogs.com
//Simple Tcp Server.
//Leo.wl
//2010-09-25
//qq:382448649
/*---------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace TcpServer
{
class Program
{
[STAThread]
static void Main(string[] args)
{
//
// TODO: 在此处添加代码以启动应用程序
//
int recv;//用于表示客户端发送的信息长度
byte[] data = new byte[1024];//用于缓存客户端所发送的信息,通过socket传递的信息必须为字节数组
Console.WriteLine("IP: " + IPAddress.Any);
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);//本机预使用的IP和端口
Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
newsock.Bind(ipep);//绑定
newsock.Listen(10);//监听
Console.WriteLine("waiting for a client");
Socket client = newsock.Accept();//当有可用的客户端连接尝试时执行，并返回一个新的socket,用于与客户端之间的通信
IPEndPoint clientip = (IPEndPoint)client.RemoteEndPoint;
Console.WriteLine("connect with client:" + clientip.Address + " at port:" + clientip.Port);
string welcome = "welcome here!";
data = Encoding.ASCII.GetBytes(welcome);
client.Send(data, data.Length, SocketFlags.None);//发送信息
while (true)
{//用死循环来不断的从客户端获取信息
data = new byte[1024];
recv = client.Receive(data);
Console.WriteLine("recv=" + recv);
if (recv == 0)//当信息长度为0，说明客户端连接断开
break;
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
client.Send(data, recv, SocketFlags.None);
}
Console.WriteLine("Disconnected from" + clientip.Address);
client.Close();
newsock.Close();
}
}
}
UDP Code :
/*----------------------------------------------------------*/
//CopyRight @ WWW.cnblogs.com
//Simple Udp Client.
//Leo.wl
//2010-09-25
//qq:382448649
/*---------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace SimpleUdpClient
{
/// <summary>
/// UDP Class
/// </summary>
class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main(string[] args)
{
//
// TODO: 在此处添加代码以启动应用程序
//
byte[] data = new byte[1024];//定义一个数组用来做数据的缓冲区
string input, stringData;
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
string welcome = "Hello,are you there?";
data = Encoding.ASCII.GetBytes(welcome);
server.SendTo(data, data.Length, SocketFlags.None, ipep);//将数据发送到指定的终结点
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)sender;
data = new byte[1024];
int recv = server.ReceiveFrom(data, ref Remote);//接受来自服务器的数据
Console.WriteLine("Message received from{0}:", Remote.ToString());
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
while (true)//读取数据
{
input = Console.ReadLine();//从键盘读取数据
if (input == "text")//结束标记
{
break;
}
server.SendTo(Encoding.ASCII.GetBytes(input), Remote);//将数据发送到指定的终结点Remote
data = new byte[1024];
recv = server.ReceiveFrom(data, ref Remote);//从Remote接受数据
stringData = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine(stringData);
}
Console.WriteLine("Stopping client");
server.Close();
}
}
}
/*----------------------------------------------------------*/
//CopyRight @ WWW.cnblogs.com
//Simple Udp Server.
//Leo.wl
//2010-09-25
//qq:382448649
/*---------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace SimpleUdpServer
{
class Program
{
[STAThread]
static void Main(string[] args)
{
//
//TODO:start
//
int recv;
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);//定义一网络端点
Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket
newsock.Bind(ipep);//Socket与本地的一个终结点相关联
Console.WriteLine("Waiting for a client..");
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//定义要发送的计算机的地址
EndPoint Remote = (EndPoint)(sender);//
recv = newsock.ReceiveFrom(data, ref Remote);//接受数据
Console.WriteLine("Message received from{0}:", Remote.ToString());
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
string welcome = "Welcome to my test server!";
data = Encoding.ASCII.GetBytes(welcome);
newsock.SendTo(data, data.Length, SocketFlags.None, Remote);
while (true)
{
data = new byte[1024];
recv = newsock.ReceiveFrom(data, ref Remote);
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
newsock.SendTo(data, recv, SocketFlags.None, Remote);
}
}
}
}
Get Mac Address:
/*----------------------------------------------------------*/
//CopyRight @ WWW.cnblogs.com
//Simple GetMacTest.
//Leo.wl
//2010-09-25
//qq:382448649
/*---------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
namespace GetMacTest
{
/// <summary>
/// Program is class name.
/// Get Remote Client Mac Address.
/// </summary>
public class Program
{
int recv = 0;
int iRemotePort = 137;
string sRemoteAddr = "61.191.148.2";
byte[] data = new byte[1024];
byte[] buffer = new byte[1024];
Socket newsock = null;
[STAThread]
static void Main(string[] args)
{
try
{
Program o = new Program();
Console.WriteLine("Mac Addr : "+ o.GetRemoteMacAddr());
Console.ReadLine();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 1.发送NetBIOS数据查询包到远程客户端。
/// 2.接受远程客户端返回的NetBIOS数据包。
/// 3.137端口是NetBIOS名称UDP,138端口是NetBIOS数据报UDP，139端口是NetBIOS会话TCP
/// </summary>
/// <param name="bytes">查询包内容</param>
/// <returns></returns>
protected byte[] MySendAndReceive(byte[] bytes)
{
try
{
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(sRemoteAddr), iRemotePort);//定义一网络端点
newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket
//newsock.Bind(ipep);//Socket与本地的一个终结点相关联
newsock.SendTo(bytes, bytes.Length, SocketFlags.None, ipep);
EndPoint Remote = (EndPoint)(ipep);
recv = newsock.ReceiveFrom(data, ref Remote);//接受数据
Console.WriteLine("Message received from: {0} ", Remote.ToString());
Console.WriteLine("接受到的远程NetBIOS数据： ");
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
return data;
}
catch (IOException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// NetBIOS查询包结构
/// </summary>
/// <returns>NetBIOS查询包</returns>
protected byte[] GetQueryCmd()
{
try
{
byte[] t_ns = new byte[50];
t_ns[0] = 0x00;
t_ns[1] = 0x00;
t_ns[2] = 0x00;
t_ns[3] = 0x10;
t_ns[4] = 0x00;
t_ns[5] = 0x01;
t_ns[6] = 0x00;
t_ns[7] = 0x00;
t_ns[8] = 0x00;
t_ns[9] = 0x00;
t_ns[10] = 0x00;
t_ns[11] = 0x00;
t_ns[12] = 0x20;
t_ns[13] = 0x43;
t_ns[14] = 0x4B;
for (int i = 15; i < 45; i++)
{
t_ns[i] = 0x41;
}
t_ns[45] = 0x00;
t_ns[46] = 0x00;
t_ns[47] = 0x21;
t_ns[48] = 0x00;
t_ns[49] = 0x01;
return t_ns;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 客户端返回的NetBIOS包中的网卡（MAC）编号。
/// </summary>
/// <param name="brevdata">客户端返回的NetBIOS包</param>
/// <returns>远程客户端的网卡地址</returns>
protected String GetMacAddr(byte[] brevdata)
{
try
{
int i = brevdata[56] * 18 + 56;
String sAddr = "";
StringBuilder sb = new StringBuilder(17);
for (int j = 1; j < 7; j++)
{
sAddr = Convert.ToInt32((0xFF & brevdata[i + j])).ToString("x");
if (sAddr.Length < 2)
{
sb.Append(0);
}
sb.Append(sAddr.ToUpper());
if (j < 6)
sb.Append(':');
}
return sb.ToString();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 关闭套接字
/// </summary>
protected void MyClose()
{
try
{
newsock.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 查询获得远程网卡地址
/// </summary>
/// <returns>远程客户端网卡地址</returns>
protected string GetRemoteMacAddr()
{
try
{
byte[] bqcmd = GetQueryCmd();
buffer = MySendAndReceive(bqcmd);
string remoteMac = GetMacAddr(buffer);
MyClose();
return remoteMac;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}
}
/**原理:
* 主机A向主机B发送“UDP－NetBIOS－NS”询问包，即向主机B的137端口，发Query包来询问主机B的NetBIOS Names信息。
* 其次，主机B接收到“UDP－NetBIOS－NS”询问包，假设主机B正确安装了NetBIOS服务........... 而且137端口开放，则主机B会向主机A发送一个“UDP－NetBIOS－NS”应答包，即发Answer包给主机A。
* 并利用UDP(NetBIOS Name Service)来快速获取远程主机MAC地址的方法 *
* @author Hyey.wl
*/
* 主机A向主机B发送“UDP－NetBIOS－NS”询问包，即向主机B的137端口，发Query包来询问主机B的NetBIOS Names信息。
* 其次，主机B接收到“UDP－NetBIOS－NS”询问包，假设主机B正确安装了NetBIOS服务........... 而且137端口开放，则主机B会向主机A发送一个“UDP－NetBIOS－NS”应答包，即发Answer包给主机A。
* 并利用UDP(NetBIOS Name Service)来快速获取远程主机MAC地址的方法 *
* @author Hyey.wl
*/
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