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[lwip-devel] [bug #58612] TCP SACK and Fast retransmission error

From: hanhui
Subject: [lwip-devel] [bug #58612] TCP SACK and Fast retransmission error
Date: Thu, 18 Jun 2020 11:32:17 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36


                 Summary: TCP SACK and Fast retransmission error
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: hanhui03
            Submitted on: Thu 18 Jun 2020 03:32:15 PM UTC
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head



LWIP_TCP_SACK_OUT was enabled when compiling lwIP, packet lost occurred during
TCP communication, the remote sent an ACK packet with SACK option, lwIP did
not retransmit, but continued to send data, Later, the remote sent a fast
retransmission request, lwIP did not retransmit the data, but continued to
send data. 

The attachment is the network packet capture data.

You can use the "tcp && tcp.port==1081" condition to filter out other packets.


File Attachments:

Date: Thu 18 Jun 2020 03:32:15 PM UTC  Name: en2.pcap  Size: 212KiB   By:



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