---- Guy Harris <guy@xxxxxxxxxxxx> wrote:
=============
>Yes, that's what I said - a 3-byte BNP header and 250 bytes of BNP
>data would have a count in the BNP header of 250, and the total length
>of the packet, including the BNP header and the BNP data, would be 253.
sorry...mis-read
>Therefore, to reassemble BNP packets - not to reassemble multi-message
>stuff, just to reassemble the BNP header and data - you would use
>tcp_dissect_pdus() in the dissector that handles the BNP header. The
>fixed-length portion size handed to tcp_dissect_pdus() would be 3, to
>cover the BNP header, and the get_pdu_len routine would fetch the byte
>count from the BNP header, add 3 to it, and return the sum.
Thanks, i have changed my code around and gotten the tcp_dissect_pdus()
to work well.
>The dissector routine called by tcp_dissect_pdus() will be handed one
>BNP message - header plus data - at a time. That is exactly what it
>is supposed to do, and what it should be doing. It would dissect the
>BNP header, and then process the data appropriately. That might
>involve doing its own reassembly, over and above the BNP-message
>reassembly being done by the TCP dissector and tcp_dissect_pdus(), for
>the multi-message stuff.
i'm not really sure what i'm supposed to be looking into for doing my
own assembly stuff. I was looking at reassemble.c as well as some
packet-foo.c files that did their own reassembly, but i found them quite
confusing. Is there any part of the reassemble.c file you would recommend,
or an example file or anything you could point me at? Maybe a quick explanation
of what are key parts in a self assembly?
Thanks for all the help,
Greg
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