Wireshark · Ethereal-dev: Re: [Ethereal-dev] Accessing TCP sequence number from another dissector

[Guy Harris <guy@xxxxxxxxxxxx>]

On Thursday, August 28, 2003, at 4:06 AM, Alex Bond wrote:

> I need to get access to the TCP seqeunce number from a dissector other 
> than the TCP and I would
> like to know if this is possible because I need to check for resent 
> packets.

If it's a dissector called by the TCP dissector, "pinfo->private_data" 
points to a "struct tcpinfo", as declared in "packet-tcp.h", which 
includes a "seq" member that's the sequence number of the first byte in 
the TCP payload.