Comment 27 for bug 308181

There is more, actually:
This is an lgpl library which can deal with SRV records withoud dependency on
bind - http://faerion.sourceforge.net/doc/rascal/

currently, it can only be downloaded using CVS, but author will release it as a
package in the near future.

the exact function is, possibly, this:
http://faerion.sourceforge.net/doc/rascal/rascal_connect_service.html