BOOL CDownloadWithSources::AddSourceInternal(CDownloadSource* pSource)
{
// Check/Reject if source is invalid
if ( ! pSource->m_bPushOnly )
{
// Reject invalid IPs (Sometimes ed2k sends invalid 0.x.x.x sources)
if ( pSource->m_pAddress.S_un.S_un_b.s_b1 == 0 )
{
delete pSource;
return FALSE;
}
// Reject if source is the local IP/port
if ( Network.m_pHost.sin_addr.S_un.S_addr == pSource->m_pAddress.S_un.S_addr )
{
if ( ( ( pSource->m_nServerPort == 0 ) && (Settings.Connection.InPort == pSource->m_nPort ) )
|| ( Settings.Connection.IgnoreOwnIP ) )
{
delete pSource;
return FALSE;
}
}
}
else if ( pSource->m_nProtocol == PROTOCOL_ED2K )
{
// Reject invalid server IPs (Sometimes ed2k sends invalid 0.x.x.x sources)
if ( pSource->m_pServerAddress.S_un.S_un_b.s_b1 == 0 )
{
delete pSource;
return FALSE;
}
}
// Check if GUID is valid (MLDonkey source exchange bug)
if ( pSource->m_bGUID )
{
if ( ( pSource->m_pGUID.w[0] == 0 ) && ( pSource->m_pGUID.w[1] == 0 ) &&
( pSource->m_pGUID.w[2] == 0 ) && ( pSource->m_pGUID.w[3] == 0 ) )
{
// GUID appear to be null, so invalidate it to prevent duplicate sources
pSource->m_bGUID = FALSE;
}
}
for ( CDownloadSource* pExisting = m_pSourceFirst ; pExisting ; pExisting = pExisting->m_pNext )
{
if ( pExisting->Equals( pSource ) )
{
if ( pExisting->m_pTransfer != NULL ||
( pExisting->m_nProtocol == PROTOCOL_HTTP && pSource->m_nProtocol != PROTOCOL_HTTP ) )
{
delete pSource;
return FALSE;
}
else
{
pSource->m_tAttempt = pExisting->m_tAttempt;
pExisting->Remove( TRUE, FALSE );
break;
}
}
}
m_nSourceCount ++;
pSource->m_pPrev = m_pSourceLast;
pSource->m_pNext = NULL;
if ( m_pSourceLast != NULL )
{
m_pSourceLast->m_pNext = pSource;
m_pSourceLast = pSource;
}
else
{
m_pSourceFirst = m_pSourceLast = pSource;
}
SetModified();
return TRUE;
}
BOOL CDownloadWithSources::AddSourceInternal(CDownloadSource* pSource)
{
if ( ! pSource )
return FALSE; // Out of memory
if ( GetEffectiveSourceCount() > Settings.Downloads.SourcesWanted )
{
delete pSource;
return FALSE; // Too many sources
}
// Check/Reject if source is invalid
if ( ! pSource->m_bPushOnly )
{
// Reject invalid IPs (Sometimes ed2k sends invalid 0.x.x.x sources)
if ( pSource->m_pAddress.S_un.S_un_b.s_b1 == 0 || pSource->m_nPort == 0 )
{
delete pSource;
return FALSE;
}
// Reject if source is the local IP/port
if ( Network.IsSelfIP( pSource->m_pAddress ) )
{
if ( Settings.Connection.IgnoreOwnIP ||
( pSource->m_nServerPort == 0 &&
Settings.Connection.InPort == pSource->m_nPort ) )
{
delete pSource;
return FALSE;
}
}
}
else if ( pSource->m_nProtocol == PROTOCOL_ED2K )
{
// Reject invalid server IPs (Sometimes ed2k sends invalid 0.x.x.x sources)
if ( pSource->m_pServerAddress.S_un.S_un_b.s_b1 == 0 )
{
delete pSource;
return FALSE;
}
}
CQuickLock pLock( Transfers.m_pSection );
if ( pSource->m_nRedirectionCount == 0 ) // Don't check for existing sources if source is a redirection
{
bool bDeleteSource = false;
bool bHTTPSource = pSource->IsHTTPSource();
bool bNeedHTTPSource = ! bHTTPSource &&
Settings.Gnutella2.Enabled &&
VendorCache.IsExtended( pSource->m_sServer );
// Remove unneeded sources
for ( POSITION posSource = GetIterator() ; posSource ; )
{
CDownloadSource* pExisting = GetNext( posSource );
ASSERT( pSource != pExisting );
if ( pExisting->Equals( pSource ) ) // IPs and ports are equal
{
bool bExistingHTTPSource = pExisting->IsHTTPSource();
if ( bNeedHTTPSource && bExistingHTTPSource )
bNeedHTTPSource = false;
if ( ( pExisting->m_nProtocol == pSource->m_nProtocol ) ||
( bExistingHTTPSource && bHTTPSource ) )
{
bDeleteSource = true; // Same protocol
}
else if ( ! pExisting->IsIdle() )
{
// Already downloading so we can remove new non-HTTP source
if ( bExistingHTTPSource && ! bHTTPSource )
bDeleteSource = true;
}
else // We are not downloading
{
// ...So we can replace non-HTTP source with a new one
if ( ! bExistingHTTPSource && bHTTPSource )
{
// Set connection delay the same as for the old source
pSource->m_tAttempt = pExisting->m_tAttempt;
pExisting->Remove( TRUE, FALSE );
}
}
}
}
if ( bDeleteSource )
{
delete pSource;
SetModified();
return FALSE;
}
// Make additional G2 source from the existing non-HTTP PeerProject source
if ( bNeedHTTPSource )
{
CString strURL = GetURL( pSource->m_pAddress, pSource->m_nPort );
if ( ! strURL.IsEmpty() )
{
if ( CDownloadSource* pG2Source = new CDownloadSource( (CDownload*)this, strURL ) )
{
pG2Source->m_sServer = pSource->m_sServer; // Copy user-agent
pG2Source->m_tAttempt = pSource->m_tAttempt; // Set the same connection delay
pG2Source->m_nProtocol = PROTOCOL_HTTP;
AddSourceInternal( pG2Source );
}
}
}
}
InternalAdd( pSource );
SetModified();
return TRUE;
}