DNS resolution in 'make test'

[Andrew Bartlett]

On Wed, 2014-09-03 at 12:08 +0200, Andreas Schneider wrote:
> Hi,
> 
> while working on MIT Kerberos stuff it became clear that we need to talk to 
> DNS server to ask it about SRV records for the KDC.
> 
> I've did some investigation and wrote a resolv_wrapper library to wrap 
> res_init(), res_query() and res_search(). It is a really simple wrapper and 
> I'm able to talk to the Samba DNS server in 'make test' now!
> 
> asn at magrathea:~/workspace/projects/samba/git> 
> LD_PRELOAD=$LD_PRELOAD:libresolv_wrapper.so 
> SOCKET_WRAPPER_PCAP_FILE=kinit.pcap RESOLV_WRAPPER_DEBUGLEVEL=5 
> RESOLV_WRAPPER_NAMESERVER="127.0.0.21"  
> KRB5_CONFIG=/home/asn/workspace/projects/samba/git/krb5_kinit.conf 
> KRB5_TRACE=/dev/stdout kinit Administrator at SAMBA.EXAMPLE.COM
> [17918] 1409738193.686386: Getting initial credentials for 
> Administrator at SAMBA.EXAMPLE.COM
> [17918] 1409738193.686668: Sending request (194 bytes) to SAMBA.EXAMPLE.COM
> [17918] 1409738193.688507: Resolving hostname localdc.samba.example.com.
> [17918] 1409738193.689448: Sending initial UDP request to dgram 127.0.0.21:88
> [17918] 1409738193.695803: Received answer (510 bytes) from dgram 
> 127.0.0.21:88
> [17918] 1409738193.696451: Response was not from master KDC
> [17918] 1409738193.696499: Received error from KDC: -1765328359/Additional 
> pre-authentication required
> [17918] 1409738193.696560: Processing preauth types: 136, 19, 2, 133
> [17918] 1409738193.696594: Selected etype info: etype aes256-cts, salt 
> "SAMBA.EXAMPLE.COMAdministrator", params ""
> [17918] 1409738193.696612: Received cookie: MIT
> Password for Administrator at SAMBA.EXAMPLE.COM: 
> 
> w00t!
> 
> 
> Soon available in your Samba master tree! :)

Nice!  This will make the subdomain stuff much more practical, and the
make test environment much less 'special'.

Now we just need to get rid of my horrid dns_hosts_file hack :-)

Andrew Bartlett

-- 
Andrew Bartlett
http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba