How to add additional information in Openflow packet header

Tag: java , sockets , header , udp , openflow Author: oaijeuxuw Date: 2014-04-23

i want to add some additional information in to vendor header in open-flow header "VENDOR" actual size of this header is 12. and it is returning 4 fields Type, Version, Length and Xid. i want to add some other value in it like flow-rate. i am using IRIS open-flow controller specification. what is flow-rate information and vendor specific messages can anybody tell me some thing how to do this.