skb_put() causes the system to loop

[Samarth <samarth.shetty@xxxxxxxxx>]

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