Requesting A and AAAA records in single DNS query
问题 I'm working on a DNS query implementation in C and interested in requesting both A and AAAA (IPv4 and IPv6) records in a single query packet, but I'm not getting any responses from the nameserver when I put the two queries together in one packet like this. I've tried sending the query to several different nameservers (both local and 8.8.8.8) with no luck. Is this something that does not work, or is it likely that my query packet is malformed? My basic algorithm for appending the AAAA query