138 lines
3.1 KiB
C++
138 lines
3.1 KiB
C++
//+---------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 2000.
|
|
//
|
|
// File: S E A R C H . C P P
|
|
//
|
|
// Contents: SSDP Search Response
|
|
//
|
|
// Notes:
|
|
//
|
|
// Author: mbend 10 Nov 2000
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
#include <pch.h>
|
|
#pragma hdrstop
|
|
|
|
#include "search.h"
|
|
#include "ssdpfunc.h"
|
|
#include "ncbase.h"
|
|
#include "announce.h"
|
|
|
|
// response ahead 1 second
|
|
#define RESPONSE_AHEAD 0.5
|
|
|
|
CSsdpSearchResponse::CSsdpSearchResponse()
|
|
: m_timer(*this), m_szResponse(NULL)
|
|
{
|
|
}
|
|
|
|
CSsdpSearchResponse::~CSsdpSearchResponse()
|
|
{
|
|
delete [] m_szResponse;
|
|
m_szResponse = NULL;
|
|
}
|
|
|
|
HRESULT CSsdpSearchResponse::HrCreate(SOCKET * pSockLocal,
|
|
SOCKADDR_IN * pSockRemote,
|
|
char * szResponse, long nMX)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
|
|
CSsdpSearchResponse * pResponse = new CSsdpSearchResponse();
|
|
if(!pResponse)
|
|
{
|
|
delete [] szResponse;
|
|
hr = E_OUTOFMEMORY;
|
|
}
|
|
if(SUCCEEDED(hr))
|
|
{
|
|
hr = pResponse->HrInitialize(pSockLocal, pSockRemote, szResponse, nMX);
|
|
if(SUCCEEDED(hr))
|
|
{
|
|
long nDelay = pResponse->CalculateDelay();
|
|
|
|
TraceTag(ttidSsdpSearchResp, "CSsdpSearchResponse::HrCreate - "
|
|
"timer started for %d", nDelay);
|
|
|
|
hr = pResponse->m_timer.HrSetTimer(nDelay);
|
|
}
|
|
else
|
|
{
|
|
delete [] szResponse;
|
|
}
|
|
|
|
if(FAILED(hr))
|
|
{
|
|
delete pResponse;
|
|
}
|
|
}
|
|
|
|
TraceHr(ttidSsdpSearchResp, FAL, hr, FALSE, "CSsdpSearchResponse::HrCreate");
|
|
return hr;
|
|
}
|
|
|
|
HRESULT CSsdpSearchResponse::HrInitialize(
|
|
SOCKET * pSockLocal,
|
|
SOCKADDR_IN * pSockRemote,
|
|
char * szResponse,
|
|
long nMX)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
|
|
m_sockLocal = *pSockLocal;
|
|
m_sockRemote = *pSockRemote;
|
|
m_nMX = nMX;
|
|
m_szResponse = szResponse;
|
|
|
|
TraceHr(ttidSsdpSearchResp, FAL, hr, FALSE, "CSsdpSearchResponse::HrInitialize");
|
|
return hr;
|
|
}
|
|
|
|
long CSsdpSearchResponse::CalculateDelay()
|
|
{
|
|
// Range = (ResponseEntry->MX - 0);
|
|
float nRange = (float)m_nMX;
|
|
long nDelay;
|
|
|
|
if (nRange > RESPONSE_AHEAD)
|
|
{
|
|
nRange -= RESPONSE_AHEAD;
|
|
nDelay = (long)((rand() * nRange / RAND_MAX) * 1000.0);
|
|
}
|
|
else
|
|
{
|
|
nDelay = 0;
|
|
}
|
|
return nDelay;
|
|
}
|
|
|
|
void CSsdpSearchResponse::TimerFired()
|
|
{
|
|
HRESULT hr = S_OK;
|
|
|
|
if (FReferenceSocket(m_sockLocal))
|
|
{
|
|
SocketSendWithReplacement(m_szResponse, &m_sockLocal, &m_sockRemote);
|
|
UnreferenceSocket(m_sockLocal);
|
|
}
|
|
|
|
TraceTag(ttidSsdpSearchResp, "Sending search response: %s", m_szResponse);
|
|
|
|
// This will queue ourselves to autodelete
|
|
hr = HrStart(TRUE, FALSE);
|
|
|
|
TraceHr(ttidSsdpSearchResp, FAL, hr, FALSE, "CSsdpSearchResponse::TimerFired");
|
|
}
|
|
|
|
DWORD CSsdpSearchResponse::DwRun()
|
|
{
|
|
// Must lock and queue work item to free ourselves or timer stuff will AV
|
|
CLock lock(m_critSec);
|
|
m_timer.HrDelete(INVALID_HANDLE_VALUE);
|
|
return 0;
|
|
}
|
|
|