This is a static archive of our old Q&A Site. Please post any new questions and answers at ask.wireshark.org.

pointing retransmission packet

0

I'm using MPTCP and there are retransmissions when fail or errors. Those retransmission packets have different sequence number but same data sequence number(DSN) as the original packets. But there is no information that it's a retransmission packet. So I want to mark that it's a retransmission packet. How would I approach this task?

asked 11 Jul '17, 02:27

ngn505's gravatar image

ngn505
6●7●7●9
accept rate: 0%

Do you mean Modbus TCP?

(11 Jul '17, 03:03) grahamb ♦

https://www.multipath-tcp.org/

(11 Jul '17, 03:07) sindy

One Answer:

0

Have a look at the doc directory in the sources. There you'll find a README on request-response tracking. That could be used to track the DSN vs seq# and find duplicates.

answered 11 Jul '17, 04:22

Jaap's gravatar image

Jaap ♦
11.7k●16●101
accept rate: 14%

yeah I've read that but don't really understand how to apply what it says..

(11 Jul '17, 22:38) ngn505

The best way to find out is reading other dissector source code. In this case look at ICMP for example.

(11 Jul '17, 23:04) Jaap ♦

First, have you checked the In depth analysis of Data Sequence Signals (DSS) mappings tickbox in Edit -> Preferences -> Protocols -> MPTCP? If not, does doing so solve your issue?

(11 Jul '17, 23:06) sindy