Hi,
I am working on linux kernel 2.6.13.4. I am trying to append some data along with the tcp acknowledgement packet.In the
tcp_send_ack () function I have modified the function as follows.
1)
// Modified: Increased size by 100
buff = alloc_skb(2*MAX_TCP_HEADER, GFP_ATOMIC);
// End of modified code
2)
// Modified Code
unsigned char *data = "">
// End of modified code
I have added a printk statement in the beginning of the function to
inform me whenever the function is called. However after doing the
above mentioned changes and on recompiling the kernel , my system keeps looping within the
tcp_send_ack () function. ( The /var/log/messages were full of my printk statements)
I also developed a simple socket program that transmits "hello
world" to the client through tcp sockets. After making the above
changes I do not recieve the correct data at the reciever end.
Attached is the modified file. Could you please let me know if I am doing something wrong .
regards,
Sam
