| Subject: | TCP_USER_TIMEOUT missing |
| Date: | Thu, 12 Oct 2017 10:22:29 +0200 |
| To: | bug-Socket [...] rt.cpan.org |
| From: | Marko Hrastovec <marko.hrastovec [...] gmail.com> |
Hi,
I would like to report an issue with Socket package in PERL. Since Linux
2.6.37 there is a socket option TCP_USER_TIMEOUT (
http://man7.org/linux/man-pages/man7/tcp.7.html), which can be set with
setsockopt. I tried to set this option but I get the error that
TCP_USER_TIMEOUT is not exported by Socket module. On the other hand,
TCP_NODELAY and other (older) options work fine.
Is there a workaround to use that option without being specified in Socket?
I have checked /usr/include/linux/tcp.h while where USER_TCP_TIMEOUT is
defined as:
#define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */
Can I just use 18 in setsockopt?
I use several Linux distributions and different Socket versions provided
with them. I have downloaded the latest *Socket 2.024* from CPAN and there
is no trace of TCP_USER_TIMEOUT. One of the systems I have tested for this
issue has the following details:
$ perl -v
This is perl 5, version 22, subversion 1 (v5.22.1) built for
x86_64-linux-gnu-thread-multi
(with 58 registered patches, see perl -V for more detail)
Copyright 1987-2015, Larry Wall
Perl may be copied only under the terms of either the Artistic License or
the
GNU General Public License, which may be found in the Perl 5 source kit.
Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl". If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.
$ uname -a
Linux marko-HP2 4.4.0-96-generic #119-Ubuntu SMP Tue Sep 12 14:59:54 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
Kind Regards
Marko