ObjFW  Diff

	OFDNSQuery *_query;
	OFNumber *_ID;
	OFDNSResolverSettings *_settings;
	size_t _nameServersIndex;
	unsigned int _attempt;
	id <OFDNSResolverQueryDelegate> _delegate;
	OFData *_queryData;
	of_socket_address_t _usedNameServer;
	OFTCPSocket *_TCPSocket;
	OFMutableData *_TCPQueryData;
	void *_TCPBuffer;
	size_t _responseLength;
	OFTimer *_cancelTimer;
}

static OF_KINDOF(OFDNSResourceRecord *)
parseResourceRecord(OFString *name, of_dns_class_t DNSClass,
    of_dns_record_type_t recordType, uint32_t TTL, const unsigned char *buffer,
    size_t length, size_t i, uint16_t dataLength)
{
	if (recordType == OF_DNS_RECORD_TYPE_A && DNSClass == OF_DNS_CLASS_IN) {
		of_socket_address_t address;

		if (dataLength != 4)
			@throw [OFInvalidServerReplyException exception];

		memset(&address, 0, sizeof(address));
		address.family = OF_SOCKET_ADDRESS_FAMILY_IPV4;
		address.length = sizeof(address.sockaddr.in);

		address.sockaddr.in.sin_family = AF_INET;
		memcpy(&address.sockaddr.in.sin_addr.s_addr, buffer + i, 4);

		return [[[OFADNSResourceRecord alloc]
		    initWithName: name

		     initWithName: name
			 DNSClass: DNSClass
			  mailbox: mailbox
		    TXTDomainName: TXTDomainName
			      TTL: TTL] autorelease];
	} else if (recordType == OF_DNS_RECORD_TYPE_AAAA &&
	    DNSClass == OF_DNS_CLASS_IN) {
		of_socket_address_t address;

		if (dataLength != 16)
			@throw [OFInvalidServerReplyException exception];

		memset(&address, 0, sizeof(address));
		address.family = OF_SOCKET_ADDRESS_FAMILY_IPV6;
		address.length = sizeof(address.sockaddr.in6);

#ifdef AF_INET6
		address.sockaddr.in6.sin6_family = AF_INET6;
#else
		address.sockaddr.in6.sin6_family = AF_UNSPEC;
#endif

		context->_TCPSocket.delegate = self;
		[context->_TCPSocket asyncConnectToHost: nameServer
						   port: 53
					    runLoopMode: runLoopMode];
		return;
	}

	context->_usedNameServer = of_socket_address_parse_ip(nameServer, 53);

	switch (context->_usedNameServer.family) {
#ifdef OF_HAVE_IPV6
	case OF_SOCKET_ADDRESS_FAMILY_IPV6:
		if (_IPv6Socket == nil) {
			of_socket_address_t address =
			    of_socket_address_parse_ip(@"::", 0);

			_IPv6Socket = [[OFUDPSocket alloc] init];
			[_IPv6Socket of_bindToAddress: &address
					    extraType: SOCK_DNS];
			_IPv6Socket.canBlock = false;
			_IPv6Socket.delegate = self;
		}

		sock = _IPv6Socket;
		break;
#endif
	case OF_SOCKET_ADDRESS_FAMILY_IPV4:
		if (_IPv4Socket == nil) {
			of_socket_address_t address =
			    of_socket_address_parse_ip(@"0.0.0.0", 0);

			_IPv4Socket = [[OFUDPSocket alloc] init];
			[_IPv4Socket of_bindToAddress: &address
					    extraType: SOCK_DNS];
			_IPv4Socket.canBlock = false;
			_IPv4Socket.delegate = self;
		}

		     didPerformQuery: context->_query
			    response: nil
			   exception: exception];
}

- (bool)of_handleResponseBuffer: (unsigned char *)buffer
			 length: (size_t)length
			 sender: (const of_socket_address_t *)sender
{
	OFDictionary *answerRecords = nil, *authorityRecords = nil;
	OFDictionary *additionalRecords = nil;
	OFDNSResponse *response = nil;
	id exception = nil;
	OFNumber *ID;
	OFDNSResolverContext *context;

	if (context == nil)
		return true;

	if (context->_TCPSocket != nil) {
		if ([_TCPQueries objectForKey: context->_TCPSocket] != context)
			return true;
	} else if (!of_socket_address_equal(sender, &context->_usedNameServer))
		return true;

	[context->_cancelTimer invalidate];
	[context->_cancelTimer release];
	context->_cancelTimer = nil;
	[_queries removeObjectForKey: ID];

	return false;
}

-	  (bool)socket: (OFDatagramSocket *)sock
  didReceiveIntoBuffer: (void *)buffer
		length: (size_t)length
		sender: (const of_socket_address_t *)sender
	     exception: (id)exception
{
	if (exception != nil)
		return true;

	return [self of_handleResponseBuffer: buffer
				      length: length

	return false;
}

- (void)asyncResolveAddressesForHost: (OFString *)host
			    delegate: (id <OFDNSResolverHostDelegate>)delegate
{
	[self asyncResolveAddressesForHost: host
			     addressFamily: OF_SOCKET_ADDRESS_FAMILY_ANY
			       runLoopMode: OFDefaultRunLoopMode
				  delegate: delegate];
}

- (void)asyncResolveAddressesForHost: (OFString *)host
		       addressFamily: (OFSocketAddressFamily)addressFamily
			    delegate: (id <OFDNSResolverHostDelegate>)delegate