[gstreamer-bugs] [Bug 630894] udpsink fails to send data on IPv4 networks if IPv6 is enabled...

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=630894
  GStreamer | gst-plugins-good | unspecified

--- Comment #2 from IOhannes <zmoelnig at iem.at> 2010-10-07 21:30:46 UTC ---
(In reply to comment #1)
> On Linux, you should be able to send ipv4 over an ipv6 socket unless you do
> setsockopt(IPV6_V6ONLY) on the port. So it sounds like maybe something is wrong
> with your system ?

in about each and every stock debian installation i have seen in the last few
months, there is a file /etc/sysctl.d/bindv6only.conf with the following
contents:

<snip>
# This sysctl sets the default value of the IPV6_V6ONLY socket option.
#
# When disabled, IPv6 sockets will also be able to send and receive IPv4
# traffic with addresses in the form ::ffff:192.0.2.1 and daemons listening
# on IPv6 sockets will also accept IPv4 connections.
#
# When IPV6_V6ONLY is enabled, daemons interested in both IPv4 and IPv6
# connections must open two listening sockets.
# This is the default behaviour of all modern operating systems.

net.ipv6.bindv6only = 1
</snip>

so i strongly believe that this is done on purpose, and with good reasons
(debian being usually more concerned with network infrastructure than with
multimedia)

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