A new document section, "IP", has been introduced in the latest snapshot of DataparkSearch: dpsearch-4.54-2013-07-07.tar.bz2.
The "IP" section contains the IP-address where the document has been dounloaded from. If you need to store this data into the database add this line into your sections.conf file:
Section IP 0 45
Then the value of ip-address will be written into urlinfo table with sname='ip'.