[FFmpeg-devel] [PATCH] IPv6 support v.2

Luca Abeni lucabe72
Fri Nov 9 01:19:53 CET 2007

Hi Nicolas,

On Thu, 2007-11-08 at 23:16 +0100, Nicolas George wrote:
> L'octidi 18 brumaire, an CCXVI, Luca Abeni a ?crit :
> > BTW, I think that the whole udp_ipv6_set_local() is quite broken: why
> > should "socket(res->ai_family, SOCK_DGRAM, 0)" fail? After all, "res"
> > has been returned by getaddrinfo()... So, is getaddrinfo() supposed to
> > return addresses belonging to unsupported families?
> I think it can. For example, imagine a GNU/Linux system: the glibc knows of
> IPv6, but the Linux kernel can be built with IPv6 disabled (or as a module,
> not loaded). In that case, getaddrinfo could reasonably return the IPv6
> address although the kernel will not be able to use it

Well, I guess the manpage is wrong, then. It says "...IPv6 socket
address structures can  be  created  if IPv6 support is available"

Ok, I'll not trust manpages again

> And even if the goal is to create a socket, the return code is relevant: for
> example, if I type "ssh she-seel" (she-seel is my laptop, it has an usual
> IPv6 global unicast address, but no public IPv4 address), and it fails, a
> different error message will help me to solve the problem:

I was specifically talking about udp_ipv6_set_local()...


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