I also like to know where I can find the data
structure for the current packet. For example, what's
inside the header, src IP port etc. 
I know it's built in the c code some where. But just
want to read some documents about this.
Help is greatly appreciated!

--- Lei Liang <[EMAIL PROTECTED]> wrote:
> Hi, falks,
>   I wondered what is the format of the pkt filter
> for the winpcap.
> currently i use very simple format such as "ip",
> "tcp" or "udp", but i
> thought there may be some comlicate format can add
> destination and source
> port number, isn't it? and are there any more
> protocols can be filtered by
> directly adding the protocol's name in the filter
> express? the third
> question is if there is another method to filter RTP
> packet except using
> source and destination port number?
> Thank you very much and any information is really
> appreciated.
> cheers,
> lei
> 


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