Read or Modify SOCKS payload

Hello Devcentral, even though apparently not much people is playing with the new SOCKS features, here I am with another question on this subject.

Can i modify (or read) the SOCKS payload of my clients' requests ?

When i dump the full TCP::payload in the CLIENT_DATA event, all i can see is the client's greeting that is part of the SOCKS handshake: 050100

I understand there is a socks-tunnel interface and that the traffic (after the handshake has completed) is likely to be processed at this level but is there a way to read or modify the socks payload from an iRule ?