lkml.org 
[lkml]   [2019]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] net: Remove the source address setting in connect() for UDP
Date
Hi, David:

Yes, I understand the code has been there for a long time. But the issues are real, and it's really nasty when
You run into them. As I described in the patch log, there is no backward compatibility Issue for fixing it.

---
There is no backward compatibility issue here as the source address setting
in connect() is not needed anyway.

- No impact on the source address selection when the source address
is explicitly specified by "bind()", or by the "IP_PKTINFO" option.

- In the case that the source address is not explicitly specified,
the selection of the source address would be more accurate and
reliable based on the up-to-date routing table.
---

Thanks. -- Enke

-----Original Message-----
From: <linux-kernel-owner@vger.kernel.org> on behalf of David Miller <davem@davemloft.net>
Date: Friday, September 6, 2019 at 12:14 AM
To: "Enke Chen (enkechen)" <enkechen@cisco.com>
Cc: "kuznet@ms2.inr.ac.ru" <kuznet@ms2.inr.ac.ru>, "yoshfuji@linux-ipv6.org" <yoshfuji@linux-ipv6.org>, "netdev@vger.kernel.org" <netdev@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "xe-linux-external(mailer list)" <xe-linux-external@cisco.com>
Subject: Re: [PATCH] net: Remove the source address setting in connect() for UDP

From: Enke Chen <enkechen@cisco.com>
Date: Thu, 5 Sep 2019 19:54:37 -0700

> The connect() system call for a UDP socket is for setting the destination
> address and port. But the current code mistakenly sets the source address
> for the socket as well. Remove the source address setting in connect() for
> UDP in this patch.

Do you have any idea how many decades of precedence this behavior has and
therefore how much you potentially will break userspace?

This boat has sailed a long time ago I'm afraid.

\
 
 \ /
  Last update: 2019-09-06 09:24    [W:0.129 / U:0.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site