[Click] Modification(handling) of an ip packet data field ?

[Eddie Kohler]

yacine.djemaiel wrote:
> Hi all,
> 
> i am trying to manipulate (display or modify) ip packet
> fields. Did anyone know how to access data field in IP packet
> for modification or displaying. I am able to access ip/tcp
> header fields by using click_ip/click_tcp structures, but how
> modify them (by using WriteablePacket for example)?. 
> 
> Thanks for any help.
> Yacine


Hi Yacine,

The general pattern is to "uniqueify" the packet, making sure that it is not 
shared.  Then the "ip_header()" and "tcp_header()" return values will become 
writable.  See IPMirror (elements/ip/ipmirror.cc) for an example.

Eddie


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