how to decode a packet based on the flags in the previous packet.

[qiaoyin_yang () selinc com]

Hello All, 

I am writing a dissector. The captured traffic has a request packet and a 
response packet. How the response should be decoded depends on the 
information in the previous request packet.  The request contains a few 
bytes that I want to read and use it in decoding the response packet. 

Are there any functions that allow me to do so? Can anybody please show me 
these functions or an example. You help is greatly appreciated!

Thanks!

Qiaoyin Yang
Schweitzer Engineering Laboratories, Inc.

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