Fails on CNAMEs

[robbat2]

$ ./srv-plz  --dns 8.8.8.8:53   _x-puppet._tcp.puppet.infra.gentoo.org. 
panic: interface conversion: dns.RR is *dns.CNAME, not *dns.SRV

goroutine 1 [running]:
github.com/neomantra/srv-plz/pkg/lookup.LookupSRVCustom({0x7ffd68e1758d, 0x27}, {0x7ffd68e17582, 0xa}, 0x0)
	(REDACTED)/srv-plz/pkg/lookup/loopkup_srv.go:72 +0x4f4
main.main()
	(REDACTED)/srv-plz/cmd/srv-plz/main.go:171 +0x9a7

DNS view:

$ dig @8.8.8.8 _x-puppet._tcp.puppet.infra.gentoo.org.  IN SRV

; <<>> DiG 9.16.37 <<>> @8.8.8.8 _x-puppet._tcp.puppet.infra.gentoo.org. IN SRV
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40372
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;_x-puppet._tcp.puppet.infra.gentoo.org.	IN SRV

;; ANSWER SECTION:
_x-puppet._tcp.puppet.infra.gentoo.org.	600 IN CNAME _x-puppet._tcp.puppet.infra.geodns.gentoo.org.
_x-puppet._tcp.puppet.infra.geodns.gentoo.org. 900 IN CNAME _x-puppet._tcp.puppet.infra.geodns-europe.gentoo.org.
_x-puppet._tcp.puppet.infra.geodns-europe.gentoo.org. 600 IN SRV 0 100 8141 petrel.gentoo.org.
_x-puppet._tcp.puppet.infra.geodns-europe.gentoo.org. 600 IN SRV 1 100 8141 finch.gentoo.org.

;; Query time: 220 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat Apr 15 22:10:03 UTC 2023
;; MSG SIZE  rcvd: 245

[neomantra]

Thanks for the report! You made it really easy to troubleshoot.

Just fixed that by skipping the CNAME records:

> ./srv-plz  --dns 8.8.8.8   _x-puppet._tcp.puppet.infra.gentoo.org
finch.gentoo.org.:8141
petrel.gentoo.org.:8141

> ./srv-plz -r --dns 8.8.8.8   _x-puppet._tcp.puppet.infra.gentoo.org
154.52.129.30:8141
140.211.166.166:8141

(I also just added auto-append of :53 too). Will be releasing this as 0.4.0.