WIN网络编程-WSAAsyncSelect

///////////////////////////////////////////////
// WSAAsyncSelect.cpp文件

//#define WSAGETSELECTERROR(lParam) HIWORD(lParam)//高字为出错代码

//#define WSAGETSELECTEVENT(lParam) LOWORD(lParam)//低字为通知码

//允许应用程序以WINDOWS消息的形式接收网络事件通知

//int WSAAsyncSelect(

//SOCKET s,//需要设置的套接字句柄

//HWND hWnd,//指定一个窗口句柄

//u_int wMsg,//网络事件到来时接收到的消息ID,可以在WM_USER以上的

//数值中任意选择一个用做ID

//long lEvent//指定哪些通知码需要发送

//)

//lEvent具体组合

//FD_READ接收到对方发过来的数据包

//FD_WRITE数据缓冲区满后再次变空时，WinSock接口通过该通知码通知应用程序。

//FD_ACCEPT监听中套接字检测到有连接进入

//FD_CONNECT如果用套接字去连接对方的主机，当连接动作完成后会接收到

//这个通知码

//FD_CLOSE 检测到套接字对应的连接被关闭

#include "../common/initsock.h"
#include <stdio.h>

#define WM_SOCKET WM_USER +101// 自定义消息
CInitSock theSock;

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam,LPARAM lParam);
int main()
{
char szClassName[] ="MainWClass";
WNDCLASSEX wndclass;
// 用描述主窗口的参数填充WNDCLASSEX结构
wndclass.cbSize =sizeof(wndclass);
wndclass.style =CS_HREDRAW|CS_VREDRAW;
wndclass.lpfnWndProc =WindowProc;
wndclass.cbClsExtra =0;
wndclass.cbWndExtra =0;
wndclass.hInstance =NULL;
wndclass.hIcon = ::LoadIcon(NULL,IDI_APPLICATION);
wndclass.hCursor = ::LoadCursor(NULL,IDC_ARROW);
wndclass.hbrBackground =(HBRUSH)::GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName =NULL;
wndclass.lpszClassName = szClassName ;
wndclass.hIconSm = NULL;
::RegisterClassEx(&wndclass);
// 创建主窗口
HWND hWnd = ::CreateWindowEx(
0,
szClassName,
"",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
NULL,
NULL);
if(hWnd == NULL)
{
::MessageBox(NULL, "创建窗口出错！","error", MB_OK);
return -1;
}

USHORT nPort = 4567;//此服务器监听的端口号

// 创建监听套节字
SOCKET sListen = ::socket(AF_INET, SOCK_STREAM,IPPROTO_TCP);
sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(nPort);
sin.sin_addr.S_un.S_addr = INADDR_ANY;
// 绑定套节字到本地机器
if(::bind(sListen,(sockaddr*)&sin, sizeof(sin)) ==SOCKET_ERROR)
{
printf(" Failed bind()\n");
return -1;
}

// 将套接字设为窗口通知消息类型。
::WSAAsyncSelect(sListen, hWnd, WM_SOCKET,FD_ACCEPT|FD_CLOSE);

// 进入监听模式
::listen(sListen, 5);

// 从消息队列中取出消息
MSG msg;
while(::GetMessage(&msg, NULL, 0,0))
{
// 转化键盘消息
::TranslateMessage(&msg);
// 将消息发送到相应的窗口函数
::DispatchMessage(&msg);
}
// 当GetMessage返回0时程序结束
return msg.wParam;
}

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam,LPARAM lParam)
{
switch (uMsg)
{
case WM_SOCKET:
{
//取得有事件发生的套节字句柄
SOCKET s =wParam;
//查看是否出错
if(WSAGETSELECTERROR(lParam))
{
::closesocket(s);
return0;
}
//处理发生的事件
switch(WSAGETSELECTEVENT(lParam))
{
caseFD_ACCEPT://监听中的套接字检测到有连接进入
{
SOCKETclient = ::accept(s, NULL, NULL);
::WSAAsyncSelect(client,hWnd, WM_SOCKET, FD_READ|FD_WRITE|FD_CLOSE);
}
break;
caseFD_WRITE:
{
}
break;
caseFD_READ:
{
charszText[1024] = { 0 };
if(::recv(s,szText, 1024, 0) == -1)
::closesocket(s);
else
printf("接收数据：%s",szText);
}
break;
caseFD_CLOSE:
{
::closesocket(s);
}
break;
}
}
return 0;
case WM_DESTROY:
::PostQuitMessage(0) ;
return 0 ;
}

// 将我们不处理的消息交给系统做默认处理
return ::DefWindowProc(hWnd, uMsg, wParam,lParam);
}