Add --host argument to replay.py to allow non-loopback interfaces

Add --host argument to replay.py to allow non-loopback interfaces

This is necessary to support RNDIS-based forwarding from Android.

BUG=https://code.google.com/p/chromium/issues/detail?id=272381

[tonyg, 2013-08-15 01:45:37]

lgtm

Let me know when you are ready and I'll land the patch for you.

https://codereview.chromium.org/23000006/diff/3001/replay.py
File replay.py (right):

https://codereview.chromium.org/23000006/diff/3001/replay.py#newcode477
replay.py:477: harness_group.add_option('--host', default=None,
Should we do any validate on this to verify that an IP address is, in fact,
passed in?

[szym, 2013-08-15 19:01:13]

https://codereview.chromium.org/23000006/diff/3001/replay.py
File replay.py (right):

https://codereview.chromium.org/23000006/diff/3001/replay.py#newcode477
replay.py:477: harness_group.add_option('--host', default=None,
On 2013/08/15 01:45:37, tonyg wrote:
> Should we do any validate on this to verify that an IP address is, in fact,
> passed in?

Currently, if you pass a non-IP string which is not an existing domain, it will
fail immediately with:
gaierror: [Errno -2] Name or service not known

If you pass a string which is a non-local domain name or an IP address that is
not available, it will fail immediately with:
error: [Errno 99] Cannot assign requested address

I like the idea of supporting "--host localhost", but the help string suggests
it needs to be an explicit address, so I could just reject anything that excepts
in socket.inet_aton

[tonyg, 2013-08-15 19:12:51]

> I could just reject anything that excepts in socket.inet_aton

SGTM

[szym, 2013-08-15 20:45:54]

On 2013/08/15 19:12:51, tonyg wrote:
> > I could just reject anything that excepts in socket.inet_aton
> 
> SGTM

Done. This is ready to land.

[tonyg, 2013-08-15 20:49:59]

On 2013/08/15 20:45:54, szym wrote:
> On 2013/08/15 19:12:51, tonyg wrote:
> > > I could just reject anything that excepts in socket.inet_aton
> > 
> > SGTM
> 
> Done. This is ready to land.

Committed revision 519.