socket通信

最新推荐文章于 2024-05-05 15:49:43 发布

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最新推荐文章于 2024-05-05 15:49:43 发布

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分类专栏： MFC 文章标签： SOCKET

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1 TCP通信之客户端 —— 学习总结

WSADATA wsaData = { 0 };

if( 0 != WSAStartup(MAKEWORD(2, 2), &wsaData) )//WSAStartup必须是应用程序或DLL调用的第一个windows sockets函数

{

OutputDebugString(_T("socket初始化失败\n"));
return FALSE;

}

SOCKET m_ClientSocket;

m_ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); //TCP 通信

int nPort = 10103;
CString strIP = _T("172.16.0.1");
sockaddr_in saServer;

saServer.sin_family = AF_INET; //地址家族

saServer.sin_port = htons(nPort); //htons转化为网络字节序

saServer.sin_addr.S_un.S_addr = inet_addr(CT2A(strIP)); //CT2A:将CString转换为char*

connect(m_ClientSocket, (SOCKADDR*)&saServer, sizeof(saServer)); //链接，省略判断是否连接成功

while(1)
{
    char szBuf[256] = { 0 };    //接收
    if(SOCKET_ERROR == recv(m_ClientSocket, szBuf, 250, 0))    //如果接收出错
        {
   closesocket(m_ClientSocket);
m_ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);    //重新进行连接操作
nPort = 10103;
strIP = _T("172.16.0.1");
saServer.sin_family = AF_INET;
saServer.sin_port = htons(nPort);
saServer.sin_addr.S_un.S_addr = inet_addr(CT2A(strIP));
connect(m_ClientSocket, (SOCKADDR*)&saServer, sizeof(saServer));

}
}

//发送数据操作
if(SOCKET_ERROR == send(m_ClientSocket, (const char*)strText.GetBuffer(), strText.GetLength()*sizeof(TCHAR), 0))

//客户端相关代码点击链接——当服务器断了下次打开重新连接。

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