Re: TCP/UDP Data Streams - Packet Reassembly

[Guy Harris <guy () netapp com>]

On Thu, Dec 19, 2002 at 12:08:27AM +0800, Susan Chan Lee wrote:
> Anyone know where to obtain information of re-assembling TCP/UDP data
> streams. 
>
> I mean I have captured data using Tcpdump (i.e. raw data), how to I
> recombine the data into the orginal word attachment (or like)?

There's more to it than just "re-assembling TCP/UDP data streams"; as
you said "word attachment", it sounds as if you're talking about e-mail,
in which case, for example, reassembling a TCP data stream for an SMTP
session would give you the SMTP traffic - but you'd have to extract the
stuff sent with the "DATA" command, and then de-MIMEify it to extract
the attachments.

Similarly, for a document downloaded with HTTP, reassembly would give
you only the HTTP traffic; you'd have to extract the document from that.
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