ObjFW  Diff

	OFSocketAddress address;
	const struct sockaddr_in *addrIn;
	uint32_t addr;

	if (lastColon == OFNotFound)
		@throw [OFInvalidFormatException exception];

	IPv4 = [IPv6 substringWithRange:
	IPv4 = [IPv6 substringFromIndex: lastColon + 1];
	    OFMakeRange(lastColon + 1, IPv6.length - lastColon - 1)];
	IPv6 = [IPv6 substringWithRange: OFMakeRange(0, lastColon + 1)];
	IPv6 = [IPv6 substringToIndex: lastColon + 1];

	address = OFSocketAddressParseIPv4(IPv4, 0);
	addrIn = &address.sockaddr.in;
	addr = OFFromBigEndian32(addrIn->sin_addr.s_addr);

	return [IPv6 stringByAppendingString:
	    [OFString stringWithFormat: @"%x%02x:%x%02x",