基于tcp的socket编程。

一。server端：

#include<iostream>

#include<windows.h>

using namespace std;

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

void main()

{

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD( 2, 2 );

//WINDOWS SOCKET APPLICITION

err = WSAStartup( wVersionRequested, &wsaData );

if ( err != 0 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL. */

return;

}

/* Confirm that the WinSock DLL supports 2.2.*/

/* Note that if the DLL supports versions greater */

/* than 2.2 in addition to 2.2, it will still return */

/* 2.2 in wVersion since that is the version we */

/* requested. */

if ( LOBYTE( wsaData.wVersion ) != 2 ||

HIBYTE( wsaData.wVersion ) != 2 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL. */

WSACleanup( );

return;

}

/* The WinSock DLL is acceptable. Proceed. */

SOCKET sockSer;

sockSer = socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN addrSer,addrCli;

addrSer.sin_family = AF_INET;

addrSer.sin_port = htons(5050);

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

//addrSer.sin_addr.S_un.S_addr = INADDR_ANY;

bind(sockSer,(SOCKADDR*)&addrSer,sizeof(SOCKADDR));

listen(sockSer,5);//???????

cout<<"服务器等待客户端的连接......"<<endl;

SOCKET sockConn;

int len = sizeof(SOCKADDR);

sockConn = accept(sockSer,(SOCKADDR*)&addrCli,&len);

if(sockConn == INVALID_SOCKET)

{

cout<<"Server Accept Client Connect Fail!"<<endl;

WSACleanup( );

return;

}

else

{

cout<<"Server Accept Client Connect Success!"<<endl;

cout<<"Client ip:>"<<inet_ntoa(addrCli.sin_addr)<<endl;

cout<<"Client port:>"<<htons(addrCli.sin_port)<<endl;

}

char sendbuf[256];

char recvbuf[256];

while(1)

{

cout<<"Ser:>";

cin>>sendbuf;

send(sockConn,sendbuf,strlen(sendbuf)+1,0);

recv(sockConn,recvbuf,256,0);

cout<<"Cli:>"<<recvbuf<<endl;

}

closesocket(sockSer);

WSACleanup( );

}

client端：

#include<iostream>

#include<windows.h>

using namespace std;

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

void main()

{

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD( 2, 2 );

//WINDOWS SOCKET APPLICITION

err = WSAStartup( wVersionRequested, &wsaData );

if ( err != 0 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL. */

return;

}

/* Confirm that the WinSock DLL supports 2.2.*/

/* Note that if the DLL supports versions greater */

/* than 2.2 in addition to 2.2, it will still return */

/* 2.2 in wVersion since that is the version we */

/* requested. */

if ( LOBYTE( wsaData.wVersion ) != 2 ||

HIBYTE( wsaData.wVersion ) != 2 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL. */

WSACleanup( );

return;

}

/* The WinSock DLL is acceptable. Proceed. */

SOCKET sockCli;

sockCli = socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN addrSer;

addrSer.sin_family = AF_INET;

addrSer.sin_port = htons(5050);

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

int res = connect(sockCli,(SOCKADDR *)&addrSer,sizeof(SOCKADDR));

if(res != 0)

{

cout<<"Client Connect Server Fail!"<<endl;

WSACleanup( );

return;

}

else

{

cout<<"Client Connect Server Success!"<<endl;

}

char sendbuf[256];

char recvbuf[256];

while(1)

{

recv(sockCli,recvbuf,256,0);

cout<<"Ser:>"<<recvbuf<<endl;

cout<<"Cli:>";

cin>>sendbuf;

send(sockCli,sendbuf,strlen(sendbuf)+1,0);

}

closesocket(sockCli);

WSACleanup( );

}