Shimomura on BPF

[Julian Assange]

>    Shimomura on BPF, NSA and Crypto:
> 
>    One of the tools I modified for my work was a sophisticated
>    piece of software called the Berkeley Packet Filter. ...
>    Unlike the original BPF, my version was designed to bury
     ^^^^^^^^^^^^^^^^^^^^^^^
>    itself inside the operating system of a computer and watch
>    for certain information as it flowed through the computer
>    from the Internet. When a packet from a certain address, or
>    for that matter any other desired piece of information
>    designated by the user flashed by, BPF would grab it and
>    place it in a file where it could be kept for later
>    viewing.

This is *exactly* what BPF does, always did and was designed to do. As
for writing the packets to a file, everything but opening and closing
the file are described in the man page. You could code it in 10 lines.

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