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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Author:
Travis Martin (TravM) 06-24-2010
--*/
#include "internal.h"
#include "Connection.tmh"
HRESULT SetSocketIpv6Only(_In_ SOCKET socket, _In_ BOOL Ipv6Only);
HRESULT SynchronousReadSocket(_In_ SOCKET Socket, _In_reads_bytes_(cbBuffer) PVOID pBuffer, _In_ DWORD cbBuffer)
{
HRESULT hr = S_OK;
DWORD dwIgnore;
OVERLAPPED Overlapped;
ZeroMemory(&Overlapped, sizeof(Overlapped));
if (!ReadFile((HANDLE)Socket, pBuffer, cbBuffer, &dwIgnore, &Overlapped))
{
hr = HRESULT_FROM_WIN32(GetLastError());
if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
{
if (!GetOverlappedResult((HANDLE)Socket, &Overlapped, &dwIgnore, TRUE))
{
hr = HRESULT_FROM_WIN32(GetLastError());
}
else
{
hr = S_OK;
}
}
}
return hr;
}
//CConnection
// static
HRESULT CConnection::Create(_In_ IConnectionCallback* pCallback, _Outptr_ CConnection** ppConnection)
{
CConnection* pConnection;
pConnection = new CConnection(pCallback);
HRESULT hr = (pConnection != NULL ? S_OK : E_OUTOFMEMORY);
if (SUCCEEDED(hr))
{
*ppConnection = pConnection;
}
return hr;
}
void CConnection::Terminate()
{
MethodEntry("void");
// Only want to terminate once
STATE PriorState = (STATE)(InterlockedExchange((long*)&_State, (long)TERMINATED));
if (PriorState != TERMINATED)
{
// Graceful shutdown
shutdown(_Socket, SD_SEND);
// Don't wait for threadpool callbacks when this thread is actually the threadpool callback
if (_ThreadpoolThreadId != GetCurrentThreadId())
{
// Let the ReceiveThreadProc gracefully shutdown
WaitForThreadpoolWorkCallbacks(_ThreadpoolWork, false);
}
SOCKET Socket = (SOCKET)InterlockedExchangePointer((PVOID*)&_Socket, (PVOID)INVALID_SOCKET);
if (Socket != INVALID_SOCKET)
{
closesocket(Socket);
}
}
MethodReturnVoid();
}
/* 9C7D2C68-5AD8-4A14-BE20-F8741D60D100 */
const GUID MAGIC_PACKET =
{0x9C7D2C68, 0x5AD8, 0x4A14, {0xBE, 0x20, 0xF8, 0x74, 0x1D, 0x60, 0xD1, 0x00}};
HRESULT CConnection::InitializeAsClient(_In_ BEGIN_PROXIMITY_ARGS* pArgs)
{
pArgs->szName[MAX_PATH-1] = L'\0';
MethodEntry("pArgs->szName = '%S'",
pArgs->szName);
// Open a TCP/IP Socket to the remote Network NearFieldProximity device
HRESULT hr = S_OK;
_Socket = socket(AF_INET6, SOCK_STREAM, 0);
if (_Socket == INVALID_SOCKET)
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
}
if (SUCCEEDED(hr))
{
hr = SetSocketIpv6Only(_Socket, FALSE);
}
if (SUCCEEDED(hr))
{
SOCKADDR_STORAGE LocalAddress = {};
SOCKADDR_STORAGE RemoteAddress = {};
DWORD cbLocalAddress = sizeof(LocalAddress);
DWORD cbRemoteAddress = sizeof(RemoteAddress);
timeval Timeout = {8, 0};
if (!WSAConnectByName(_Socket, pArgs->szName, L"9299",
&cbLocalAddress, (SOCKADDR*)&LocalAddress,
&cbRemoteAddress, (SOCKADDR*)&RemoteAddress, &Timeout, NULL))
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
TraceErrorHR(hr, L"WSAConnectByName FAILED");
}
}
if (SUCCEEDED(hr))
{
if (setsockopt(_Socket, SOL_SOCKET, SO_UPDATE_CONNECT_CONTEXT, NULL, 0) == SOCKET_ERROR)
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
}
}
if (SUCCEEDED(hr))
{
// Send the Magic Packet
if (send(_Socket, (char*)&MAGIC_PACKET, sizeof(MAGIC_PACKET), 0) == SOCKET_ERROR)
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
}
if (SUCCEEDED(hr))
{
GUID MagicPacket = {};
hr = SynchronousReadSocket(_Socket, &MagicPacket, sizeof(MagicPacket));
if (SUCCEEDED(hr))
{
if (memcmp(&MagicPacket, &MAGIC_PACKET, sizeof(MAGIC_PACKET)) != 0)
{
hr = E_FAIL;
}
}
}
if (SUCCEEDED(hr))
{
// This doesn't take the socket, because we're the client and already
// have the socket in _Socket.
hr = FinalizeEstablish(INVALID_SOCKET);
}
}
if (FAILED(hr))
{
if (_Socket != INVALID_SOCKET)
{
// Abortive shutdown of the socket
closesocket(_Socket);
_Socket = INVALID_SOCKET;
}
}
MethodReturnHR(hr);
}
void CConnection::ValidateAccept(_In_ SOCKET Socket, _In_ GUID* pMagicPacket)
{
MethodEntry("...");
TraceASSERT(Socket != INVALID_SOCKET);
HRESULT hr = S_OK;
if (memcmp(pMagicPacket, &MAGIC_PACKET, sizeof(MAGIC_PACKET)) != 0)
{
hr = E_FAIL;
}
if (SUCCEEDED(hr))
{
// Send the MAGIC_PACKET
if (send(Socket, (char*)&MAGIC_PACKET, sizeof(MAGIC_PACKET), 0) == SOCKET_ERROR)
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
}
}
if (SUCCEEDED(hr))
{
hr = FinalizeEstablish(Socket);
}
if (FAILED(hr))
{
// Abortive shutdown of the socket
closesocket(Socket);
}
MethodReturnVoid();
}
HRESULT CConnection::FinalizeEstablish(_In_ SOCKET Socket)
{
MethodEntry("...");
HRESULT hr = S_OK;
STATE PriorState = (STATE)(InterlockedCompareExchange((long*)&_State, (long)ESTABLISHED, (long)INITIAL));
if (PriorState != INITIAL)
{
// Already established (or terminated), drop this
hr = HRESULT_FROM_WIN32(ERROR_ALREADY_INITIALIZED);
}
if (SUCCEEDED(hr))
{
// Init Threadpool work item for the receieve thread proc.
_ThreadpoolWork = CreateThreadpoolWork(s_ReceiveThreadProc, this, NULL);
if (_ThreadpoolWork == NULL)
{
hr = HRESULT_FROM_WIN32(GetLastError());
}
else
{
if (Socket != INVALID_SOCKET)
{
// Take ownership of the socket
_Socket = Socket;
}
SubmitThreadpoolWork(_ThreadpoolWork);
_pCallback->ConnectionEstablished(this);
}
}
MethodReturnHR(hr);
}
BOOL CConnection::ReceiveThreadProc()
{
MethodEntry("void");
MESSAGE* pMessage = new MESSAGE();
if (pMessage == NULL)
{
Terminate();
}
else
{
while (_Socket != INVALID_SOCKET)
{
if (recv(_Socket, (char*)pMessage, sizeof(*pMessage), MSG_WAITALL) == sizeof(*pMessage))
{
_pCallback->HandleReceivedMessage(pMessage);
}
else
{
Terminate();
break;
}
}
delete pMessage;
}
// The connection is now terminated
BOOL fConnectionDeleted = _pCallback->ConnectionTerminated(this);
MethodReturnBool(fConnectionDeleted);
}
HRESULT CConnection::TransmitMessage(_In_ MESSAGE* pMessage)
{
HRESULT hr = S_OK;
if (_Socket == INVALID_SOCKET)
{
hr = HRESULT_FROM_WIN32(WSAENOTSOCK);
}
else
{
if (send(_Socket, (char*)pMessage, sizeof(*pMessage), 0) == SOCKET_ERROR)
{
hr = HRESULT_FROM_WIN32(WSAGetLastError());
Terminate();
}
}
return hr;
}
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