我一直在努力学习如何在C ++中使用套接字,所以我搜索了一个教程,我读了它,教程说有两种方法从套接字接收信息,第一种是通过无限循环检查不断recv和另一个使用异步套接字,我尝试使用asyncronous但我得到错误10022我搜索错误,它说在函数中有一个无效的参数,我想它的句柄功能我googled一种方式找到解决此运行时错误的方法,但我无法正常工作。
public: static bool ListenOnPort(int port)
{
int error = WSAStartup(0x0202, &w);
if (error)
{
printf_s("Por alguna razón no se ha podido iniciar WSAStartup");
WSACleanup();
return false;
}
if (w.wVersion != 0x0202)
{
WSACleanup();
return false;
}
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
mysocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (mysocket == INVALID_SOCKET)
{
printf_s("No se ha podido iniciar el socket 's'");
Functions::CloseConnection();
return false;
}
listen(mysocket, SOMAXCONN);
if (!WSAAsyncSelect(mysocket,Hwnd, MY_MESSAGE_NOTIFICATION, (FD_ACCEPT | FD_CONNECT |FD_READ | FD_CLOSE)))
{
printf("\nWSAAsyncSelect initialized succesfully\n");
}
else
{
printf("\nAn error ocurred while executing WSAsyngSelect (%d)[1]\n", WSAGetLastError());
}
if (bind(mysocket, (LPSOCKADDR)&addr, sizeof(addr)) == SOCKET_ERROR)
{
printf("We coundnt bind");
Functions::CloseConnection();
return false;
}
return true;
}
WndProc功能:
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
Hwnd = (HWND)GetModuleHandle(NULL);
switch (message)
{
case MY_MESSAGE_NOTIFICATION:
{
switch (lParam)
{
case FD_ACCEPT:
{
printf_s("There's a connection incomming\n");
accept(wParam, 0, 0);
break;
}
case FD_CONNECT:
{
printf("A socket has just connected to the host.\n");
break;
}
case FD_READ:
{
char buf[256];
memset(buf, 0, sizeof(buf));
recv(mysocket, buf, sizeof(buf)-1, 0);
break;
}
case FD_CLOSE:
{
printf_s("A connection has just been shutted down.\n");
Functions::CloseConnection();
break;
}
}
}
default:return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
//break;
}
编辑:我的主要功能:
int main(int argc, char *argv[])
{
//printf_s("Ingresa la dirección IP para conectar.\n");
if (argc != 0)
{
Functions::ListenOnPort(7182);
while (true)
{
if (Conectado == false)
{
printf_s("\nConnecting to %s on port 7182\n", (char*)"127.0.0.1");
Functions::ConnectToHost(7182, (char*)"127.0.0.1");
cin.get();
}
else
{
Sleep(120);
}
}
}
Functions::CloseConnection();
return 0;
}
答案 0 :(得分:3)
这行代码不正确:
Hwnd = (HWND)GetModuleHandle(NULL);
模块句柄的类型为HMODULE
,与HWND
类型的窗口句柄完全不同。你需要后者。
看起来好像你没有创建一个窗口。您需要通过拨打CreateWindow
来执行此操作。您希望通过将HWND_MESSAGE
传递到hWndParent
CreateWindow
参数来创建仅限消息的窗口。您必须在致电WSAAsyncSelect
之前创建窗口,原因很明显,您需要将窗口句柄传递给WSAAsyncSelect
。
您还需要运行消息循环,以便分派您的套接字消息。您的计划似乎也缺少这一点。
这是一个非常复杂的主题。我建议您找到一些异步Windows套接字的示例代码,然后从那里开始。