[Bug 43286] New: Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

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wine-bugs＠winehq.org

6 Jul 2017 6 Jul '17

2:56 a.m.

https://bugs.winehq.org/show_bug.cgi?id=43286

Bug ID: 43286 Summary: Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)" Product: Wine Version: 2.11 Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: winsock Assignee: wine-bugs@winehq.org Reporter: winehq@supradigital.org Distribution: ---

Created attachment 58625 --> https://bugs.winehq.org/attachment.cgi?id=58625 Binary, source code, debug log

In any program using Qt 5.7.0, if you try to read a udp datagram packet, the call would always return size 0 and leave you with an empty peer-address/port as well.

I discovered the problem in the launcher for my game which uses UDP to ping various servers.

I wrote a minimal UDP server to which you can connect with netcat (or anything) and it easily reproduces the problem.

Attached you'll find a small archive containing:

- minimal udp test server - source code for that server - debug log with +winsock showing the error - the client netcat command to cause that error

Note: I have not checked a simple raw UDP server using the winsock API directly.

The problem exists at least since wine v1.6.2

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wine-bugs＠winehq.org

6 Jul 6 Jul

2:58 a.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

Marenz winehq@supradigital.org changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |winehq@supradigital.org

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wine-bugs＠winehq.org

3:42 a.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

--- Comment #1 from Marenz winehq@supradigital.org --- Update: The problem does NOT seem to happen when I start the udptest server using wineconsole or winedebug

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wine-bugs＠winehq.org

3:46 a.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

--- Comment #2 from Marenz winehq@supradigital.org --- However that seems to be only true for console based programs. My launcher still doesn't work, even with winedbg/wineconsole

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wine-bugs＠winehq.org

10:32 a.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

Fabian Maurer dark.shadow4@web.de changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |dark.shadow4@web.de

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wine-bugs＠winehq.org

11 Jul 11 Jul

9:04 p.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

Damjan Jovanovic damjan.jov@gmail.com changed:

--- Comment #3 from Damjan Jovanovic damjan.jov@gmail.com --- There is a real bug here.

The problem is that Wine's WSARecvFrom() cannot distinguish between: 1. truncation during conversion of cmsghdrs from *nix to Windows, which is an error. 2. a NULL WSAMSG.Control.buf passed in by the application, which is valid when there is no control data to convert.

It always treats it as case (1) and reports an error.

This is the case even with Wine 4.12.1.

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wine-bugs＠winehq.org

9:06 p.m.

New subject: [Bug 43286] Qt 5.7.0 based: Cannot read UDP packets: "errno 90, ( Message too long)"

https://bugs.winehq.org/show_bug.cgi?id=43286

--- Comment #4 from Damjan Jovanovic damjan.jov@gmail.com --- Created attachment 64888 --> https://bugs.winehq.org/attachment.cgi?id=64888 allow NULL control buffer in WSARecvMsg

Proposed test case and patch that seems to fix the problem.

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wine-bugs＠winehq.org

2 Aug 2 Aug

2:56 a.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers ( Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Damjan Jovanovic damjan.jov@gmail.com changed:

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wine-bugs＠winehq.org

2:59 a.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers ( Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Damjan Jovanovic damjan.jov@gmail.com changed:

--- Comment #5 from Damjan Jovanovic damjan.jov@gmail.com --- commit aa2c84a9db064a16598c4198c435e2e5896dd059 Author: Damjan Jovanovic <damjan.jov@...> Date: Thu Aug 1 06:11:21 2019 +0200

ws2_32: WSARecvMsg allows a NULL control buffer when no control messages arrive.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=43286

Resolving FIXED.

Thank you for your excellent bug report and test case!

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wine-bugs＠winehq.org

3 a.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers ( Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Damjan Jovanovic damjan.jov@gmail.com changed:

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wine-bugs＠winehq.org

7:28 p.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers ( Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Alexandre Julliard julliard@winehq.org changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED

--- Comment #6 from Alexandre Julliard julliard@winehq.org --- Closing bugs fixed in 4.13.

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WineHQ Bugzilla

29 Oct 29 Oct

10:53 p.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers (Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Michael Stefaniuc mstefani@winehq.org changed:

What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.0.x

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WineHQ Bugzilla

25 Nov 25 Nov

9:34 p.m.

New subject: [Bug 43286] WSARecvMsg wrongly forbids NULL control buffers (Qt 5.7.0 based: Cannot read UDP packets: "errno 90, (Message too long)")

https://bugs.winehq.org/show_bug.cgi?id=43286

Michael Stefaniuc mstefani@winehq.org changed:

What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.0.x |---

--- Comment #7 from Michael Stefaniuc mstefani@winehq.org --- Removing the 4.0.x milestone from bug fixes included in 4.0.3.

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