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bug#45821: Emacs UDP support on Windows
From: |
Robert Pluim |
Subject: |
bug#45821: Emacs UDP support on Windows |
Date: |
Mon, 02 Jan 2023 14:29:50 +0100 |
>>>>> On Mon, 02 Jan 2023 14:41:00 +0200, Eli Zaretskii <eliz@gnu.org> said:
>> Cc: "45821@debbugs.gnu.org" <45821@debbugs.gnu.org>
>> From: Robert Pluim <rpluim@gmail.com>
>> Date: Mon, 02 Jan 2023 11:22:03 +0100
>>
Alex> ❌ Indeed, TLS is broken -> Eww to
>> https://www.gnu.org<https://www.gnu.org/> fails to load the page (
>> see attached image – Emacs instance on the left, compiled with UDP
>> patch, didn’t load gnu.org while on the right side- default Emacs
>> build for 28.1 opens it without any issues)
>>
>> Yep. Last time I looked at this, the TLS handshaking fails to complete
>> (see src/process.c around line 5329 and the checking against
>> GNUTLS_EMACS_HANDSHAKES_LIMIT) which means weʼre continually retrying
>> the handshake without giving the remote end a chance to send us
>> anything. Which I think means that our state machine for TLS
>> negotiation is subtly incorrect, but only on MS-Windows.
Eli> On MS-Windows, there's another state machine involved, the one
Eli> vis-a-vis the reader thread we start to read the stuff from the
Eli> network connection. See reader_thread and sys_select in w32proc.c and
Eli> sys_write, sys_read, _sys_read_ahead, _sys_wait_accept, and
Eli> _sys_wait_connect in w32.c.
Hmm, in that case I then suspect that `sys_select' is indicating that
the socket it connected even when it isnʼt. I took a look, but nothing
looks obviously wrong (and itʼs not something I can currently test).
Robert
--
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/01
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/01
- bug#45821: Emacs UDP support on Windows, Robert Pluim, 2023/01/02
- bug#45821: Emacs UDP support on Windows, Eli Zaretskii, 2023/01/02
- bug#45821: Emacs UDP support on Windows,
Robert Pluim <=
- bug#45821: Emacs UDP support on Windows, Eli Zaretskii, 2023/01/02
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/02
- bug#45821: Emacs UDP support on Windows, Robert Pluim, 2023/01/03
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/03
- bug#45821: Emacs UDP support on Windows, Robert Pluim, 2023/01/04
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/04
- bug#45821: Emacs UDP support on Windows, Robert Pluim, 2023/01/04
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/05
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/05
- bug#45821: Emacs UDP support on Windows, Alex Matei, 2023/01/05