Re: ping takes much time to myself?

[Richard B. Johnson]

On Mon, 26 Apr 2004, Parag Nemade wrote:

> hello,
>      i want to add my own variables with icmp header.
> so i modified icmp header and added 2 variables to
> make icmp header len is 16 bytes. but when i build
> kernel image and boot it and then ping to myself why
> am i still getting 8 bytes header i.e. 84 bytes packet
> and why not 92 bytes packet?
> 56 bytes data + 16 bytes icmp header + 20 bytes ip
> header = 92 bytes
> also ping results shown below takes much time to ping
> myself. what gone wrong? how to make it behave like
> normal ping?


You don't modify the kernel to make a new ICMP packet!
You modify `ping` or make your own. If you change the
length of the header, it is no longer ICMP. Your
tools will misinterpret what you have.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.26 on an i686 machine (5557.45 BogoMips).
            Note 96.31% of all statistics are fiction.


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