TCP ACKs carrying data

[se go]

Hello,

i got some problems concerning tcp realization in kernel (v 2.4).

i need to make some modifications to tcp to be able to transfer data within ACK segments...(initially their data field is empty)

i suppose i should modify the following functions:

/net/ipv4/tcp_input.c > tcp_ack()  - for processing incoming acks, to read data from their data field

and

/net/ipv4/tcp_output.c > tcp_send_ack() - for processing outgoing acks, to put data in them

my questions are: 
 - am i right in my decision?
 - what problems these modifications may cause (i tried to modify and they do cause!... i just cannot understand what they are)
 - what functions else i may need to modify?
 - how must i modify ACKs to make them do what i want and to make linux kernel correctly treating them.

if you need i can reply the list of modifications i've done.

i'd like to be personally CC'd.


thanks in advance,

Serge Goodenko
Moscow Institute of Physics and Technology
Moscow, Russia

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