Normalize 0x20 queries in dnsdist statistics

[mikedamm]

• Program: dnsdist
• Issue type: Bug report

Short description

dnsdist copies the QNAME as sent by the client into the buffer used for generating statistics. As a result a client sending 0x20 queries generates odd output in topQueries().

Environment

• Operating system: Ubuntu 16.04
• Software version: 1.1.0
• Software source: pdns repo

Other information

Example from production:

> topQueries(1000)
 100  0.conTRol4.Pool.NTp.org.                   13  0.1%
 135  MX.pool.ntp.org.                            6  0.1%
 198  1.lEDe.pOoL.ntP.oRg.                        2  0.0%
 246  _ntp._UdP.SG.POOL.NtP.Org.                  1  0.0%
 272  0.XX.pool.ntp.org.                          1  0.0%
 275  1.fReEbsd.pOol.nTP.Org.                     1  0.0%
 276  0.Se.pool.ntp.Org.                          1  0.0%