netdev - Re: [PATCH] ipv6: check for IPv4 mapped addresses when connecting IPv6 sockets

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Message-Id: <20110805.035704.1083062407751815748.davem@davemloft.net>
Date:	Fri, 05 Aug 2011 03:57:04 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	makc@...hat.com
Cc:	netdev@...r.kernel.org, vladislav.yasevich@...com
Subject: Re: [PATCH] ipv6: check for IPv4 mapped addresses when connecting
 IPv6 sockets

From: Max Matveev <makc@...hat.com>
Date: Thu, 4 Aug 2011 17:42:44 +1000

> When support for binding to 'mapped INADDR_ANY (::ffff.0.0.0.0)' was added
> in 0f8d3c7ac3693d7b6c731bf2159273a59bf70e12 the rest of the code
> wasn't told so now it's possible to bind IPv6 datagram socket to
> ::ffff.0.0.0.0, connect it to another IPv4 address and it will all
> work except for getsockhame() which does not return the local address
> as expected.
> 
> To give getsockname() something to work with check for 'mapped INADDR_ANY'
> when connecting and update the in-core source addresses appropriately.
> 
> Signed-off-by: Max Matveev <makc@...hat.com>

Applied, but I had to fixup some trailing whitespace:

> @@ -102,10 +107,12 @@ ipv4_connected:
>  
>  		ipv6_addr_set_v4mapped(inet->inet_daddr, &np->daddr);
>  
> -		if (ipv6_addr_any(&np->saddr))
> +		if (ipv6_addr_any(&np->saddr) ||
> +		    ipv6_mapped_addr_any(&np->saddr))
>  			ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
>  
> -		if (ipv6_addr_any(&np->rcv_saddr)) {
> +		if (ipv6_addr_any(&np->rcv_saddr) || 
						    ^^

there.
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