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[lwip-devel] [bug #29067] TCP PCB stays in stated CLOSED when close() in
From: |
Stephane Lesage |
Subject: |
[lwip-devel] [bug #29067] TCP PCB stays in stated CLOSED when close() initiated by LwIP |
Date: |
Thu, 04 Mar 2010 08:57:52 +0000 |
User-agent: |
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) |
URL:
<http://savannah.nongnu.org/bugs/?29067>
Summary: TCP PCB stays in stated CLOSED when close()
initiated by LwIP
Project: lwIP - A Lightweight TCP/IP stack
Submitted by: slesage
Submitted on: jeu 04 mar 2010 09:57:51 CET
Category: TCP
Severity: 3 - Normal
Item Group: Faulty Behaviour
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release:
lwIP version: CVS Head
_______________________________________________________
Details:
This was first posted on [lwip-users] close(), TIME_WAIT and bind().
I have checked with Wireshark that the connection is closed properly with the
peer (FIN, FIN+ACK, ACK)
I enabled TCP_DEBUG to see what happens:
1. When the peer closes the connection, there is no problem.
tcp_bind: bind to port 12302
TCP connection request 21413 -> 12302.
TCP connection established 21413 -> 12302.
tcp_close: closing in State: LISTEN
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_slowtmr: processing active pcb
tcp_close: closing in State: CLOSE_WAIT
TCP connection closed: LAST_ACK 21413 -> 12302.
tcp_pcb_purge
tcp_bind: bind to port 12302
2. Now (CVS head), whenever my device closes the connection, I cannot bind()
for exactly 2 minutes (I thought the last connection stayed in TIME_WAIT...)
tcp_bind: bind to port 12302
TCP connection request 21400 -> 12302.
TCP connection established 21400 -> 12302.
tcp_close: closing in State: LISTEN
tcp_recved: recveived 1 bytes, wnd 8192 (0).
tcp_fasttmr: delayed ACK
tcp_slowtmr: processing active pcb
tcp_recved: recveived 5 bytes, wnd 8192 (0).
tcp_close: closing in State: ESTABLISHED
TCP connection closed: FIN_WAIT_2 21400 -> 12302.
tcp_pcb_purge
tcp_close: closing in State: TIME_WAIT
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_slowtmr: no active pcbs
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
tcp_close: closing in State: CLOSED
[...]
_______________________________________________________
Reply to this item at:
<http://savannah.nongnu.org/bugs/?29067>
_______________________________________________
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http://savannah.nongnu.org/
- [lwip-devel] [bug #29067] TCP PCB stays in stated CLOSED when close() initiated by LwIP,
Stephane Lesage <=