3 ip_addr SenderIP; # IP address of Sender
4 uint16 SenderPort; # IP port of Sender
5 int64 ReceiptTime; # time this event was received, in millis since epoch
6 int16 enc; # encoding of strings in the event; 0: iso-8859-1, 1: utf-8
7 uint16 SiteID; # id of site sending the event