Method FindMatchingClient

src/ClientList.cpp:253–347

CUpDownClient* CClientList::FindMatchingClient( CUpDownClient* client )
{
	typedef std::pair<IDMap::const_iterator, IDMap::const_iterator> IDMapIteratorPair;
	wxCHECK(client, NULL);

	const uint32 userIP = client->GetIP();
	const uint32 userID = client->GetUserIDHybrid();
	const uint16 userPort = client->GetUserPort();
	const uint16 userKadPort = client->GetKadPort();


	// LowID clients need a different set of checks
	if (client->HasLowID()) {
		// User is firewalled ... Must do two checks.
		if (userIP && (userPort || userKadPort)) {
			IDMapIteratorPair range = m_ipList.equal_range(userIP);

			for ( ; range.first != range.second; ++range.first ) {
				CUpDownClient* other = range.first->second.GetClient();
				wxASSERT(userIP == other->GetIP());

				if (userPort && (userPort == other->GetUserPort())) {
					return other;
				  } else if (userKadPort && (userKadPort == other->GetKadPort())) {
					return other;
				}
			}
		}

		const uint32 serverIP = client->GetServerIP();
		const uint32 serverPort = client->GetServerPort();
		if (userID && serverIP && serverPort) {
			IDMapIteratorPair range = m_clientList.equal_range(userID);

			for (; range.first != range.second; ++range.first) {
				CUpDownClient* other = range.first->second.GetClient();
				wxASSERT(userID == other->GetUserIDHybrid());

				// For lowid, we also have to check the server
				if (serverIP == other->GetServerIP()) {
					if (serverPort == other->GetServerPort()) {
						return other;
					}
				}
			}
		}
	} else if (userPort || userKadPort) {
		// Check by IP first, then by ID
		struct { const IDMap& map; uint32 value; } toCheck[] = {
			{ m_ipList, userIP }, { m_clientList, userID }
		};

		for (size_t i = 0; i < itemsof(toCheck); ++i) {
			if (toCheck[i].value == 0) {
				// We may not have both (or any) of these values.
				continue;
			}