dnsdist: include rcode to packet cache dump

[SrX]

• Program: dnsdist 1.4.0
• Issue type: Feature request

Short description

Add the response code to packet cache dump.

Usecase

Improve troubleshooting and traceability.

Description

In the current dnsdist version, packet cache doesn't include the response code of the query.

Current output, domain 2222222.hola.com has a response code NXDomain and hola.com. is an noerror.

[@localhost]# cat /tmp/pc.dump
; dnsdist's packet cache dump follows
;
2222222.hola.com. 295 A ; key 1246589825, length 118, tcp 0, added 1593008327
hola.com. 3565 A ; key 1899171056, length 53, tcp 0, added 1593008297

Desired output with response code:

[@localhost]# cat /tmp/pc.dump
; dnsdist's packet cache dump follows
;
2222222.hola.com. 295 A nxdomain; key 1246589825, length 118, tcp 0, added 1593008327
hola.com. 3565 A noerror; key 1899171056, length 53, tcp 0, added 1593008297