[iRule] Pool redirect using hex values

Try this:

when CLIENT_ACCEPTED {
    TCP::collect
}
when CLIENT_DATA {
     grab 15 hex bytes
    binary scan [TCP::payload] H15 hex

     look at the 10th hex value
    switch [string index $hex 10] {
        10 { pool poolA }
        12 { pool poolB }
    }

     release the payload
    TCP::release
}

This of course assumes that the 10th hex value in EVERY TCP packet, or at least the first in each new TCP session is always a "10" or "12". Otherwise you'd need to employ some form of persistence to manage subsequent requests.