icmp messages

[Mark Allman]

>   i had to implement the same. my requirement was to
>   send an icmp source quench message to source A
>   whenever a router drops a packet from source A.
> 
>   the way i did it is like this:
>
> [...]

Your method worked great.  I am not sure if my implementation is the
cleanest, but it does seem to be working OK.  I still have a few
more minor things to do, but the hard part is done.  Thanks for the
suggestion.  It was a big help!

allman