SocketLibrary.cpp

[詳解]

// ----------------------------------------------------------------------------
 
#include "pch.h"
#include "SocketLibrary.h"
 
using namespace alt;
 
SocketLibrary::SocketLibrary ()
{
    _socket = INVALID_SOCKET;
}
 
SocketLibrary::~SocketLibrary ()
{
    this->Close ();
}
 
int SocketLibrary::Close ()
{
    int ret = 0;
 
    if (_socket != INVALID_SOCKET)
    {
        ret = ::closesocket (_socket);
        _socket = INVALID_SOCKET;
    }
 
    return ret;
}
 
DWORD SocketLibrary::GetErrNo () const
{
    return static_cast<DWORD>(::WSAGetLastError ());
}
 
BOOL SocketLibrary::SetKeepAliveValue (
    ULONG onoff, ULONG time, ULONG interval) const
{
    struct tcp_keepalive keepAlive = { 0, 0, 0 };
    keepAlive.onoff = onoff;
    keepAlive.keepalivetime = time;
    keepAlive.keepaliveinterval = interval;
    DWORD dwVal = 0;
 
    int ret = this->WSAIoctl (
        SIO_KEEPALIVE_VALS, &keepAlive, sizeof (keepAlive), NULL, 0, &dwVal,
        NULL, NULL);
 
    return ret == 0 ? TRUE : FALSE;
}
 
int SocketLibrary::WSAIoctl (
    DWORD dwIoControlCode, LPVOID lpvInBuffer, DWORD dwInBuffer,
    LPVOID lpvOutBuffer, DWORD dwOutBuffer, LPDWORD lpdwBytesReturned,
    LPWSAOVERLAPPED lpOverlapped,
    LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine) const
{
    return ::WSAIoctl (
        _socket, dwIoControlCode, lpvInBuffer, dwInBuffer, lpvOutBuffer,
        dwOutBuffer, lpdwBytesReturned, lpOverlapped, lpCompletionRoutine);
}