CNAMEs return A record when original query is for AAAA; #1464
Description
Describe the bug
When querying a hostname (in a hosted zone) with type AAAA, if the response is a CNAME then the second response returns an A record instead of AAAA.
To Reproduce
Steps to reproduce the behavior:
- Setup hostname with A and AAAA results; setup CNAME to that hostname
- Query record that returns a CNAME with type AAAA
- Response is an A record, not AAAA
- Querying record with type A returns A record
- Querying the target record of the CNAME returns the correct record type for the query
Expected behavior
Second response to a query returning a CNAME should return the record type of the original query
Screenshots
Querying Gravity
$ dig @192.168.0.252 www.example.com
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10157
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com. IN A
;; ANSWER SECTION:
www.example.com. 0 IN CNAME example.com.
example.com. 0 IN A 192.168.0.238
;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:38 AWST 2025
;; MSG SIZE rcvd: 115
$ dig @192.168.0.252 www.example.com a
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46385
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com. IN A
;; ANSWER SECTION:
www.example.com. 0 IN CNAME example.com.
example.com. 0 IN A 192.168.0.238
;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:41 AWST 2025
;; MSG SIZE rcvd: 115
$ dig @192.168.0.252 www.example.com aaaa
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12548
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com. IN AAAA
;; ANSWER SECTION:
www.example.com. 0 IN CNAME example.com.
example.com. 0 IN A 192.168.0.238
;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:43 AWST 2025
;; MSG SIZE rcvd: 115
$ dig @192.168.0.252 example.com
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43914
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com. IN A
;; ANSWER SECTION:
example.com. 0 IN A 192.168.0.238
;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:48 AWST 2025
;; MSG SIZE rcvd: 69
$ dig @192.168.0.252 example.com a
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41909
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com. IN A
;; ANSWER SECTION:
example.com. 0 IN A 192.168.0.238
;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:50 AWST 2025
;; MSG SIZE rcvd: 69
$ dig @192.168.0.252 example.com aaaa
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62397
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com. IN AAAA
;; ANSWER SECTION:
example.com. 0 IN AAAA 2400:aaaa:bbbb:cccc:dddd:eeee::0
;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:52 AWST 2025
;; MSG SIZE rcvd: 81
Querying DNSmasq:
$ dig www.example.com a
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> www.example.com a
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45239
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;www.example.com. IN A
;; ANSWER SECTION:
www.example.com. 0 IN CNAME example.com.
example.com. 0 IN A 192.168.0.238
;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Fri Jan 24 09:04:41 AWST 2025
;; MSG SIZE rcvd: 75
$ dig www.example.com aaaa
; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> www.example.com aaaa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2309
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;www.example.com. IN AAAA
;; ANSWER SECTION:
www.example.com. 0 IN CNAME example.com.
example.com. 0 IN AAAA 2400:aaaa:bbbb:cccc:dddd:eeee::0
;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Fri Jan 24 09:04:43 AWST 2025
;; MSG SIZE rcvd: 87
Logs
Output of docker-compose logs or kubectl logs respectively
Version and Deployment (please complete the following information):
- Gravity version: 0.26.1
- Deployment: kubernetes statefulset, external etcd
Additional context