Re: [PATCH 0/4] Removal of textual IP usage

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On Mon, Aug 24, 2015 at 10:26:02AM -0700, Andy Grover wrote:
> Based on hch's suggestion, move away from storing textual
> representations of IP and port in favor of storing struct
> sockaddr_storage, which can then be printed as needed using %pISc or
> %pISpc prink formats.
> 
> The first patch fixes the double-brackets issue, I tested it
> separately and recommend @stable.
> 
> The following patches replace other spots in a similar manner, and
> then switch all usage of __kernel_sockaddr_storage to the shorter
> equivalent, sockaddr_storage.

Since my IN6ADDR_ANY patch caused some of this mess in the first place,
I took the time to test as many configurations as I could think of with
this patch set.  It all looks good.

target portal   discovery address	SendTargets response
INADDR_ANY  	v4			v4
v4		v4			v4
IN6ADDR_ANY	v4			v4
IN6ADDR_ANY	v6			v6
v6		v6			v6

About the only thing I could come up with (and this isn't changed by
this patch set) is manually specifying a non-IN6ADDR_ANY v4-mapped-on-v6
address for the target portal.  Because the v4 format override only
happens for IN6ADDR_ANY portals, there is a way to respond to a v4
connection with a v6 address.

target portal       discovery address	SendTargets response
[::ffff:c0a8:7a7d]  192.168.122.125	[::ffff:192.168.122.125]

But this is such a strange case, intentionally specifying a IPv6 address
for IPv4 connectivity, that I don't know if it even makes sense to worry
about.

Reviewed-by: Chris Leech <cleech@xxxxxxxxxx>

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