Method ProcessExtPacket

src/ClientTCPSocket.cpp:973–1774

bool CClientTCPSocket::ProcessExtPacket(const uint8_t* buffer, uint32 size, uint8 opcode)
{
	#ifdef __PACKET_RECV_DUMP__
	//printf("Rec: OPCODE %x \n",opcode);
	DumpMem(buffer,size);
	#endif

	// 0.42e - except the catches on mem exception and file exception
	if (!m_client) {
		throw wxString("Unknown clients sends extended protocol packet");
	}
	/*
	if (!client->CheckHandshakeFinished()) {
		// Here comes an extended packet without finishing the handshake.
		// IMHO, we should disconnect the client.
		throw wxString("Client send extended packet before finishing handshake");
	}
	*/
	switch(opcode) {
		case OP_MULTIPACKET_EXT:
			AddDebugLogLineN( logRemoteClient, "Remote Client: OP_MULTIPACKET_EXT from " + m_client->GetFullIP());
		/* fall through */
		case OP_MULTIPACKET: {
			if (opcode == OP_MULTIPACKET) AddDebugLogLineN( logRemoteClient, "Remote Client: OP_MULTIPACKET from " + m_client->GetFullIP() );

			theStats::AddDownOverheadFileRequest(size);

			if (m_client->IsBanned()) {
				break;
			}

			if (!m_client->CheckHandshakeFinished()) {
				// Here comes an extended packet without finishing the handshake.
				// IMHO, we should disconnect the client.
				throw wxString("Client send OP_MULTIPACKET before finishing handshake");
			}

			CMemFile data_in(buffer, size);
			CMD4Hash reqfilehash = data_in.ReadHash();
			uint64 nSize = (opcode == OP_MULTIPACKET_EXT) ? data_in.ReadUInt64() : 0;

			bool file_not_found = false;
			CKnownFile* reqfile = theApp->sharedfiles->GetFileByID(reqfilehash);
			if ( reqfile == NULL ){
				reqfile = theApp->downloadqueue->GetFileByID(reqfilehash);
				if ( !( reqfile != NULL && reqfile->GetFileSize() > PARTSIZE ) ) {
					AddDebugLogLineN(logRemoteClient, "Remote client asked for a non-shared file");
					file_not_found = true;
				}
			}

			if (!file_not_found && reqfile->IsLargeFile() && !m_client->SupportsLargeFiles()) {
				AddDebugLogLineN(logRemoteClient, "Remote client asked for a large file but doesn't support them");
				file_not_found = true;
			}

			if (!file_not_found && nSize && (reqfile->GetFileSize() != nSize)) {
				AddDebugLogLineN(logRemoteClient, "Remote client asked for a file but specified wrong size");