1758272 - IMAPS server FIN request shall be granted and give back kernel resources

Status: UNCONFIRMED

(MailNews Core :: Networking: IMAP, defect)

Description

[Bernhard Riegler]

Attachment: thunderbird_IMAPS_START.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:97.0) Gecko/20100101 Firefox/97.0

Steps to reproduce:

Version 91.5 in Ubuntu 20.04LTS
use wireshark to monitor the TCP connections for TCP port 993

1. start thunderbird and connect to one mailbox IMAPS port 993
2. do nothing, let it idle and close thunderbird after 5 minutes

Actual results:

there are 2 TCP connections per mailbox (TCP port 993)
the wireshark was started fresh just before the thunderbird start.
(file thunderbird_IMAPS_START*) wireshark timestamp 23.868 sec
after idle time IMAPS server sends a TCP flag FIN. wireshark timestamp 152.001 sec
at wireshark timestamp 316.394 sec I closed the thunderbird app.

Expected results:

I want thunderbird to react at wireshark timestamp 152.001 sec with a TCP flag FIN
in the opposite TCP direction.
there is in the UI lower left corner a possibility to go into "offline mode".
just go into the same code path and close down the IMAPS TCPconnection.
this will give back kernel resources on both sides of the TCP connection

Comment 1

[Bernhard Riegler]

Attachment: thunderbird_IMAPS_END.png

2nd file