简单的 C++ SOCKET编程 ---基于TCP/IP协议

分别建两个工程。。把cpp拷贝进去运行就可以了。。。

server端：

#include <WINSOCK2.H>

#include <stdio.h>

#pragma comment(lib,"ws2_32.lib")

void main()

{

//创建套接字

WORD myVersionRequest;

WSADATA wsaData;

myVersionRequest=MAKEWORD(1,1);

int err;

err=WSAStartup(myVersionRequest,&wsaData);

if (!err)

{

printf("已打开套接字\n");

}

else

{

//进一步绑定套接字

printf("嵌套字未打开!");

return;

}

SOCKET serSocket=socket(AF_INET,SOCK_STREAM,0);//创建了可识别套接字

//需要绑定的参数

SOCKADDR_IN addr;

addr.sin_family=AF_INET;

addr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);//ip地址

addr.sin_port=htons(6000);//绑定端口

bind(serSocket,(SOCKADDR*)&addr,sizeof(SOCKADDR));//绑定完成

listen(serSocket,5);//其中第二个参数代表能够接收的最多的连接数

//////////////////////////////////////////////////////////////////////////

//开始进行监听

//////////////////////////////////////////////////////////////////////////

SOCKADDR_IN clientsocket;

int len=sizeof(SOCKADDR);

while (1)

{

SOCKET serConn=accept(serSocket,(SOCKADDR*)&clientsocket,&len);//如果这里不是accept而是conection的话。。就会不断的监听

char sendBuf[100];

sprintf(sendBuf,"welcome %s to bejing",inet_ntoa(clientsocket.sin_addr));//找对对应的IP并且将这行字打印到那里

send(serConn,sendBuf,strlen(sendBuf)+1,0);

char receiveBuf[100];//接收

recv(serConn,receiveBuf,strlen(receiveBuf)+1,0);

printf("%s\n",receiveBuf);

closesocket(serConn);//关闭

WSACleanup();//释放资源的操作

}

}

client端：

#include <WINSOCK2.H>

#include <stdio.h>

#pragma comment(lib,"ws2_32.lib")

void main()

{

int err;

WORD versionRequired;

WSADATA wsaData;

versionRequired=MAKEWORD(1,1);

err=WSAStartup(versionRequired,&wsaData);//协议库的版本信息

if (!err)

{

printf("客户端嵌套字已经打开!\n");

}

else

{

printf("客户端的嵌套字打开失败!\n");

return;//结束

}

SOCKET clientSocket=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN clientsock_in;

clientsock_in.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");

clientsock_in.sin_family=AF_INET;

clientsock_in.sin_port=htons(6000);

//bind(clientSocket,(SOCKADDR*)&clientsock_in,strlen(SOCKADDR));//注意第三个参数

//listen(clientSocket,5);

connect(clientSocket,(SOCKADDR*)&clientsock_in,sizeof(SOCKADDR));//开始连接

char receiveBuf[100];

recv(clientSocket,receiveBuf,101,0);

printf("%s\n",receiveBuf);

send(clientSocket,"hello,this is client",strlen("hello,this is client")+1,0);

closesocket(clientSocket);

WSACleanup();

}