socket网络编程之TCP_Server

#include <Winsock2.h>
#include <stdio.h>
#include <windows.h>
#include <string.h>

DWORD WINAPI RecvProc(
LPVOID lpParameter   // thread data
);

struct RECVPARAM
{
SOCKET sock;
SOCKADDR_IN sockaddr;
};
void main()
{
WORD wVersionRequseted;
WSADATA wsaData;
int err;
wVersionRequseted = MAKEWORD(1, 1);
err = WSAStartup(wVersionRequseted, &wsaData);
if(err!=0)
{
return;
}
if(LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) !=1)
{
WSACleanup();
return;
}

SOCKET socketSrv = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);

bind(socketSrv, (SOCKADDR *)&addrSrv, sizeof(SOCKADDR));

listen(socketSrv, 5);

SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);

HANDLE hRecvThread;
RECVPARAM *pRecvParam=new RECVPARAM;

printf("服务器启动\n");
while(1)
{
SOCKET sockConn = accept(socketSrv, (SOCKADDR*)&addrClient, &len);

pRecvParam->sock=sockConn;
pRecvParam->sockaddr = addrClient;
hRecvThread=CreateThread(NULL,0,RecvProc,(LPVOID)pRecvParam,0,NULL);
}
delete pRecvParam;

}

DWORD WINAPI RecvProc(
LPVOID lpParameter   // thread data
)
{
char recvBuf[200];
memset(recvBuf,0 ,200);

SOCKET sockClient =((RECVPARAM*)lpParameter)->sock;
SOCKADDR_IN addrClient = ((RECVPARAM*)lpParameter)->sockaddr;
printf("%s 进入连接\n", inet_ntoa(addrClient.sin_addr));
while(TRUE)
{
if(!recv(sockClient, recvBuf, 200,0))
{
printf("%s 客户端断开连接\n", inet_ntoa(addrClient.sin_addr));
break;
}
if(0==strcmp(recvBuf, "abc"))
{
send(sockClient, "thank you!", strlen("thank you!"), 0);
closesocket(sockClient);
break;
}
printf("%s\n", recvBuf);
}

printf("线程终止\n");
return 0;
}

链接时需要包含ws2_32.lib库文件，对于VC6.0在菜单-工程-设置里面，或者在头文件下面添加：#pragma comment(lib,"ws2_32.lib")

如果在MFC中编写网络应用程序，需注意以下两点：

1. 在StdAfx.h头文件中包含 #include <Afxsock.h>, 这个头文件中包含了MFC封装后的套接字类，比如：CSocket和CAyncSocket，但是你也可以不使用这些类。

2. 在CXXApp类中的InitInstance函数中调用AfxSocketInit()函数，加载套接字库，也就是这个函数封装了WSAStartup函数来进行套接字的初始化，程序退出后MFC会自动调用WSACleanup函数。