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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
Connection.cpp
Abstract:
Module for the socket connection specfic routines in the driver.
Makes Connection to the server given server host and port address.
Environment:
User mode only
--*/
#include "internal.h"
#include "connection.tmh"
CConnection::CConnection()
/*++
Routine Description:
Constructor for connection object
Arguments:
None
Return Value:
VOID
--*/
{
// Initialize the socket member as Invalid
Trace(
TRACE_LEVEL_INFORMATION,
"%!FUNC!"
);
m_socket = INVALID_SOCKET;
}
HRESULT
CConnection::Connect(
IN IWDFDevice *pDevice
)
/*++
Routine Description:
This routine is for the initialization of the connection object associated with
the File Object . It is invoked from the dispatch OnCreateFile on the default
queue callback of the driver. It socket connection to the client.
Arguments:
pDevice = Wdf Device Object
Return Value:
S_OK if success , error HRESULT otherwise
--*/
{
Trace(
TRACE_LEVEL_INFORMATION,
"%!FUNC!"
);
HRESULT hr = S_OK;
addrinfoW* info = NULL ;
PWSTR hostStr = NULL;
PWSTR portStr = NULL;
//
// Reads the host and port strings stored in the device context.
//
DeviceContext *pContext = NULL;
hr = pDevice->RetrieveContext((void**)&pContext);
if ( FAILED(hr) )
{
Trace(
TRACE_LEVEL_ERROR,
L"ERROR: unable to retrieve context from wdf device object %!hresult!",
hr
);
goto Clean0;
}
hostStr = pContext->hostStr;
portStr = pContext->portStr;
//
// lookup hostname with addrinfo hints;
//
addrinfoW hints;
ZeroMemory(&hints,sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
int n = GetAddrInfoW(hostStr, portStr, &hints, &info);
if (n != 0)
{
DWORD err = WSAGetLastError();
Trace(
TRACE_LEVEL_ERROR,
L"ERROR: Unable to find address/port of host %!winerr!",
err
);
hr = HRESULT_FROM_WIN32(err);
goto Clean0;
}
//
// Create a socket with this infomation recvd in getaddrinfo
//
m_socket = socket(info->ai_family,info->ai_socktype,info->ai_protocol);
if (m_socket == INVALID_SOCKET)
{
DWORD err = WSAGetLastError();
Trace(
TRACE_LEVEL_ERROR,
L"ERROR: Unable to create socket %!winerr!",
err
);
hr = HRESULT_FROM_WIN32(err);
goto Clean0;
}
//
// If that succeeds , proceed to connect to the socket
//
ATLASSERT(info->ai_addrlen <= 0x7fffffff);
int nret = connect(m_socket,info->ai_addr,(int)info->ai_addrlen);
if (nret == SOCKET_ERROR)
{
DWORD err = WSAGetLastError();
Trace(
TRACE_LEVEL_ERROR,
L"ERROR: Unable to connect to host %!winerr!",
err
);
hr = HRESULT_FROM_WIN32(err);
goto Clean0;
}
Clean0:
if (info != NULL)
{
FreeAddrInfoW(info);
}
if (FAILED(hr) && m_socket != INVALID_SOCKET)
{
closesocket(m_socket);
m_socket = INVALID_SOCKET;
}
return hr;
}
HANDLE
CConnection::GetSocketHandle(
)
/*++
Routine Description:
Function returns the socket handle associated with this connection object
Arguments:
None
Return Value:
Socket handle if valid socket
INVALID_HANDLE_VALUE otherwise
--*/
{
Trace(
TRACE_LEVEL_INFORMATION,
"%!FUNC!"
);
if ( INVALID_SOCKET != m_socket )
{
return (HANDLE)m_socket ;
}
else
{
return INVALID_HANDLE_VALUE;
}
}
VOID
CConnection::Close()
/*++
Routine Description:
Closes the socket connection to the server associated with this connection object
Arguments:
None
Return Value:
None
--*/
{
Trace(
TRACE_LEVEL_INFORMATION,
"%!FUNC!"
);
if (m_socket != INVALID_SOCKET)
{
closesocket(m_socket);
m_socket = INVALID_SOCKET;
}
}
|
