lwIP - A Lightweight TCP/IP stack - Bugs: bug #59504, Connection reset
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bug #59504: Connection reset
Submitter: | Oleg Kobrin <kiabrin> | ||
Submitted: | Mon 23 Nov 2020 09:37:03 AM UTC | ||
Category: | TCP | Severity: | 3 - Normal |
Item Group: | Faulty Behaviour | Status: | None |
Privacy: | Public | Assigned to: | None |
Open/Closed: | Open | Planned Release: | None |
lwIP version: | git head |
Mon 23 Nov 2020 11:14:09 AM UTC, comment #2: |
Oleg Kobrin <kiabrin> |
Mon 23 Nov 2020 09:42:06 AM UTC, comment #1: Using Java client application I got the message:
|
Oleg Kobrin <kiabrin> |
Mon 23 Nov 2020 09:37:03 AM UTC, original submission:
Hello.
|
Oleg Kobrin <kiabrin> |
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Corresponding source code
Using Wireshark I see that my side does not ACK any packets after first one:
646 14.463599 172.23.3.32 172.23.3.85 TCP 66 50422 → 8070 [PSH, ACK] Seq=13 Ack=1461 Win=64240 Len=12
649 14.511317 172.23.3.85 172.23.3.32 TCP 1514 8070 → 50422 [PSH, ACK] Seq=1461 Ack=13 Win=4084 Len=1460
After some timeout host retransmits unacked packets:
673 14.764273 172.23.3.32 172.23.3.85 TCP 66 [TCP Retransmission] 50422 → 8070 [PSH, ACK] Seq=13 Ack=6781 Win=64240 Len=12
...
706 15.363707 172.23.3.32 172.23.3.85 TCP 66 [TCP Retransmission] 50422 → 8070 [PSH, ACK] Seq=13 Ack=14053 Win=63628 Len=12
...
767 16.563900 172.23.3.32 172.23.3.85 TCP 90 [TCP Retransmission] 50422 → 8070 [PSH, ACK] Seq=13 Ack=25281 Win=64240 Len=36
...
911 18.963925 172.23.3.32 172.23.3.85 TCP 114 [TCP Retransmission] 50422 → 8070 [PSH, ACK] Seq=13 Ack=53329 Win=64240 Len=60
...
1260 23.764679 172.23.3.32 172.23.3.85 TCP 174 [TCP Retransmission] 50422 → 8070 [PSH, ACK] Seq=13 Ack=106417 Win=63028 Len=120
...
but my side continues sending ack=13 until connection closed.
1849 33.365213 172.23.3.32 172.23.3.85 TCP 54 50422 → 8070 [RST, ACK] Seq=241 Ack=218305 Win=0 Len=0
1850 33.365455 172.23.3.85 172.23.3.32 TCP 1514 8070 → 50422 [PSH, ACK] Seq=218305 Ack=13 Win=4084 Len=1460
1851 33.365476 172.23.3.32 172.23.3.85 TCP 54 50422 → 8070 [RST] Seq=13 Win=0 Len=0
1852 33.365673 172.23.3.85 172.23.3.32 TCP 1514 8070 → 50422 [PSH, ACK] Seq=219765 Ack=13 Win=4084 Len=1460
1853 33.365685 172.23.3.32 172.23.3.85 TCP 54 50422 → 8070 [RST] Seq=13 Win=0 Len=0