libnet_write

Hi

1. can libnet_write write packets that were not built in the libnet context
? i dont think so.
2. that means if i capture a TCP packet and inject it back using libnet
functions, say even without any changes at all(to headeror payload), I need
to reconstruct the tcp header using the call libnet_build_tcp() and then
build the ip_header using libnet_build_ip() and only then i can write it
using libnet_write() ?? !!, is there no way of passing a pointer to a raw
packet(one which we created, or caught and now want to reinject) without
going through these build functions, because as you can see calling all
these build functions for packets which were caught and are now being
reinjected after a delay involves a lot of overhead ??

thanks
Amit


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