Method ProcessAICHRequest

src/DownloadClient.cpp:1666–1716

void CUpDownClient::ProcessAICHRequest(const uint8_t* packet, uint32 size)
{
	if (size != 16 + 2 + CAICHHash::GetHashSize()) {
		throw wxString("Received AICH Request Packet with wrong size");
	}

	CMemFile data(packet, size);

	CMD4Hash hash = data.ReadHash();
	uint16 nPart = data.ReadUInt16();
	CAICHHash ahMasterHash(&data);
	CKnownFile* pKnownFile = theApp->sharedfiles->GetFileByID(hash);
	if (pKnownFile != NULL){
		if (pKnownFile->GetAICHHashset()->GetStatus() == AICH_HASHSETCOMPLETE && pKnownFile->GetAICHHashset()->HasValidMasterHash()
			&& pKnownFile->GetAICHHashset()->GetMasterHash() == ahMasterHash && pKnownFile->GetPartCount() > nPart
			&& pKnownFile->GetFileSize() > EMBLOCKSIZE && pKnownFile->GetFileSize() - PARTSIZE*nPart > EMBLOCKSIZE)
		{
			CMemFile fileResponse;
			fileResponse.WriteHash(pKnownFile->GetFileHash());
			fileResponse.WriteUInt16(nPart);
			pKnownFile->GetAICHHashset()->GetMasterHash().Write(&fileResponse);
			if (pKnownFile->GetAICHHashset()->CreatePartRecoveryData(nPart*PARTSIZE, &fileResponse)){
				AddDebugLogLineN(logAICHTransfer,
					CFormat("AICH Packet Request: Successfully created and send recoverydata for '%s' to %s")
						% pKnownFile->GetFileName() % GetClientFullInfo());

				CPacket* packAnswer = new CPacket(fileResponse, OP_EMULEPROT, OP_AICHANSWER);
				theStats::AddUpOverheadOther(packAnswer->GetPacketSize());
				AddDebugLogLineN(logLocalClient, "Local Client: OP_AICHANSWER to" + GetFullIP());
				SafeSendPacket(packAnswer);
				return;
			} else {
				AddDebugLogLineN(logAICHTransfer,
					CFormat("AICH Packet Request: Failed to create recoverydata for '%s' to %s")
						% pKnownFile->GetFileName() % GetClientFullInfo());
			}
		} else {
			AddDebugLogLineN(logAICHTransfer,
				CFormat("AICH Packet Request: Failed to create recoverydata - Hashset not ready or requested Hash differs from Masterhash for '%s' to %s")
					% pKnownFile->GetFileName() % GetClientFullInfo());
		}
	} else {
		AddDebugLogLineN( logAICHTransfer, "AICH Packet Request: Failed to find requested shared file - " + GetClientFullInfo() );
	}

	CPacket* packAnswer = new CPacket(OP_AICHANSWER, 16, OP_EMULEPROT);
	packAnswer->Copy16ToDataBuffer(hash.GetHash());
	theStats::AddUpOverheadOther(packAnswer->GetPacketSize());
	AddDebugLogLineN(logLocalClient, "Local Client: OP_AICHANSWER to" + GetFullIP());
	SafeSendPacket(packAnswer);
}

void CUpDownClient::ProcessAICHFileHash(CMemFile* data, const CPartFile* file){
	CPartFile* pPartFile;