ulog: how to read?

[Luca Ferrari]

Hi all,
I've got an ubuntu machine that is running as firewall with iptables and ulog, 
but I'm not able to read the information stored in the database.
For instance:
ulog=# select ip_saddr, ip_daddr from ulog limit 10;
  ip_saddr  |  ip_daddr
------------+------------
 2130706433 | 2130706433
 2130706433 | 2130706433
 2130706433 | 2130706433
 1427304323 | 1427304325
 2130706433 | 2130706433
 2130706433 | 2130706433
 2130706433 | 2130706433
 2130706433 | 2130706433
 2130706433 | 2130706433
 1427304323 | 1427304325
(10 rows)


how should I cast such address to be displayied as IPs? Anyone can point me to 
a tutorial or a documentation that explains how to read the ulog information?

Thanks,
Luca