[Sugar-devel] [TRANSIENT] Peer XOs NOT shown in Neighborhood view when Power Management is enabled

[Samuel Greenfeld]

On Tue, Jan 1, 2013 at 7:34 PM, Jerry Vonau <jvonau at shaw.ca> wrote:

> On Wed, 2012-12-19 at 09:48 -0500, Martin Langhoff wrote:
> > On Wed, Dec 19, 2012 at 5:14 AM, Jerry Vonau <jvonau at shaw.ca> wrote:
> > > Think I found the problem, in powerd we're setting WOL based on this
> > > string:
> > >
> > > if grep -qi ": 00000000:14B2" /proc/net/tcp
> > >
> > > but that string is not present in /proc/net/tcp so WOL is not set
> > > according to ethtool, but that string can be found in /proc/net/tcp6
> > >
> > > avahi is bound to tcp6 when viewed with 'netstat -nat'
> > >
> > > This is reproducible in 12.1.0 and 13.1.0
> >
> > Arghhh. Ouch.
> >
> > Does it behave better with:
> >
> >   if grep -qi ": 00000000:14B2" /proc/net/tcp*
>

This does not work because IPv6 addresses are longer (and therefore have
more octets).

The variant I came up with (if we want to support both v4 and v6 listeners)
is

if grep -qiE ": 00000000+:14B2" /proc/net/tcp?

Simply removing the ": " check on its own might be sufficient for our
purposes but could falsely return true in a few cases.

If IPv4 backward compatibility on the listener check is not a concern, then
you should just match on the longer string of zeros:14B6 in /proc/net/tcp6
and not check both files for speed.
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