指定された時間が経過した後、受け入れ呼び出しをタイムアウトにしようとしています。ここでの提案に従ってみました。
この場合、TIMEVAL構造体を渡して呼び出すときに選択します。問題は、tv.tv_usecを約40分程度に設定すると、指定した40分待つのではなく、選択した呼び出しがすぐにタイムアウトすることです。MSDNによると、selectのタイムアウトは待機する最大時間ですが、selectまたはacceptがタイムアウトする前に特定の期間待機するようにするにはどうすればよいですか?
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <WinSock2.h>
#include <Ws2tcpip.h>
#include <cstdio>
#include <tchar.h>
VOID _tmain( int argc, TCHAR *argv[] )
{
WSADATA wsaData = { 0 };
ADDRINFOA hINTs = { 0 };
PADDRINFOA pResult = NULL;
SOCKET hServerSocket = INVALID_SOCKET,
hClientSocket = INVALID_SOCKET;
TIMEVAL tv = { 0 };
INT iReturnStatus = -1;
DWORD dwRecvTimeout = 30000, // Milliseconds
dwSendTimeout = 30000; // Milliseconds
fd_set readFDs = { 0 };
if ( WSAStartup( MAKEWORD( 2, 2 ), &wsaData ) )
{
_tprintf_s( TEXT( "WSAStartup Failed\n" ) );
return;
}
ZeroMemory( &hINTs, sizeof( hINTs ) );
hINTs.ai_family = AF_INET;
hINTs.ai_socktype = SOCK_STREAM;
hINTs.ai_protocol = IPPROTO_TCP;
hINTs.ai_flags = AI_PASSIVE;
if ( getaddrinfo( NULL, TEXT( "9001" ), &hINTs, &pResult ) )
{
WSACleanup();
_tprintf_s( TEXT( "getaddrinfo Failed\n" ) );
return;
}
if ( ( hServerSocket = socket( pResult -> ai_family, pResult -> ai_socktype, pResult -> ai_protocol ) ) == INVALID_SOCKET )
{
freeaddrinfo( pResult );
WSACleanup();
_tprintf_s( TEXT( "socket Failed\n" ) );
return;
}
int iResult = bind( hServerSocket, ( pResult -> ai_addr ), pResult -> ai_addrlen );
if ( iResult == SOCKET_ERROR )
{
freeaddrinfo( pResult );
closesocket( hServerSocket );
WSACleanup();
_tprintf_s( TEXT( "bind Failed\n" ) );
return;
}
freeaddrinfo( pResult );
if ( listen( hServerSocket, SOMAXCONN ) )
{
closesocket( hServerSocket );
WSACleanup();
_tprintf_s( TEXT( "listen Failed\n" ) );
return;
}
hClientSocket = INVALID_SOCKET;
for ( ;; )
{
tv.tv_usec = 2400000000; // microseconds
FD_ZERO( &readFDs );
FD_SET( hServerSocket, &readFDs );
_tprintf( "select()\n" );
iReturnStatus = select( 0, &readFDs, NULL, NULL, &tv );
// Select Error
if ( iReturnStatus == SOCKET_ERROR )
{
_tprintf( "select Failed\n" );
}
// Select Success
else if ( iReturnStatus )
{
// Connection Established On Server Socket
if ( FD_ISSET( hServerSocket, &readFDs ) )
{
// Accept Client Connection
hClientSocket = accept( hServerSocket, NULL, NULL );
if ( hClientSocket == INVALID_SOCKET )
{
_tprintf( "accept Failed\n" );
}
else
{
// Set Recv Timeout
setsockopt( hClientSocket, SOL_SOCKET, SO_RCVTIMEO, ( const char * ) &dwRecvTimeout, sizeof( dwRecvTimeout ) );
// Set Send Timeout
setsockopt( hClientSocket, SOL_SOCKET, SO_SNDTIMEO, ( const char * ) &dwSendTimeout, sizeof( dwSendTimeout ) );
// Process Client Request(s)
// HandleConnection( ClientSocket );
}
}
// Connection Established On Unknown Socket
else
{
_tprintf( "Invalid Socket Returned\n" );
}
}
// Select Timeout
else
{
_tprintf( "select Timeout\n" );
}
}
if ( hServerSocket != INVALID_SOCKET )
closesocket( hServerSocket );
return;
}