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rahtoll_74678's avatar
rahtoll_74678
Icon for Nimbostratus rankNimbostratus
Sep 08, 2012

Check for String in TCP Payload from a specific position

  Hi Guys,     I’m new here, as well as with F5 systems. Though basic load balancing is okay, I have this requirement where I believe iRules would be of big help. From the TCP payload, ...
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rahtoll_74678's avatar
rahtoll_74678
Icon for Nimbostratus rankNimbostratus
Sep 14, 2012
Just for update, I have modified the iRule to the one below and so far our simulation tests ended up to be positive and met the desired results! The payload actually starts at x56, so i just attempted this irule initially:

 

 

when CLIENT_ACCEPTED {

 

TCP::collect 65

 

}

 

 

when CLIENT_DATA {

 

 

use pool2 by default

 

pool test_pool2

 

 

set mero [TCP::payload 15]

 

Start reading at the 5th byte and save 6 characters to $match

 

if {[binary scan $mero x5a6 match] == 1}{

 

log local0. "Matched $match"

 

if { $match eq "000001" } {

 

pool test_pool1

 

}

 

}

 

TCP::release

 

}

 

 

 

It may require adjustment but hopefully no :) Again thanks for the support!

 

 

 

Lez