[FFmpeg-devel] [PATCH] UDP: join multicast group on the interface specified with, &localaddr=

[Michael Niedermayer]

On Fri, Dec 13, 2013 at 01:26:39PM +0200, Stoian Ivanov wrote:
> Hi All,
> 
>    When joining multicast groups, ffmpeg was using INADDR_ANY as interface address
> which leads to enabling the multicast group on the interface with "default gateway".
> Often multicast traffic is received over dedicated interface, which scenario ffmpeg was
> unable to handle.
>   With this patch, ffmpeg will enable multicast group to the interfaces
> configured with address specified in &localaddr= parameter of udp:// URL. To avoid
> loacal_addr resolve at udp_close(...) the UDPContext structure was extended with
> struct sockaddr_storage local_addr_storage member, which is populated in udp_open(..)
> and passed to udp_join_multicast_group()  and udp_leave_multicast_group()
> 
>   Minimal patch but large impact for multicasted ffmpegers :)
> 
> Best regards
>   Stoian Ivanov

>  udp.c |   21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)
> ee0a0ec2d8deb138bfd1a4bda9fbe1f81c034fd1  0001-UDP-join-multicast-group-on-the-interface-specified-.patch
> From 9bd3f5cef8016028e5e4f48df970b8793f42dd4a Mon Sep 17 00:00:00 2001
> From: Stoian Ivanov <s.ivanov at teracomm.bg>
> Date: Fri, 13 Dec 2013 12:49:34 +0200
> Subject: [PATCH] UDP: join multicast group on the interface specified with
>  &localaddr=
> 
> When joining multicast groups, ffmpeg was using INADDR_ANY as interface address
> which leads to enabling the multicast group on the interface with "default gateway".
> Often multicast traffic is received over dedicated interface, which scenario ffmpeg was
> unable to handle. With this patch, ffmpeg will enable multicast group to the interfaces
> configured with address specified in &localaddr= parameter of udp:// URL. To avoid
> loacal_addr resolve at udp_close(...) the UDPContext structure was extended with
> struct sockaddr_storage local_addr_storage member, which is populated in udp_open(..)
> and passed to udp_join_multicast_group()  and udp_leave_multicast_group().
> 
> Signed-off-by: Stoian Ivanov <s.ivanov at teracomm.bg>

applied

if you want to (co-)maintain the code, please send a patch that adds
yourself to MAINTAINERs for udp

Thanks

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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