netdev - udp hash change and ipv6

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Date:	Tue, 01 May 2007 13:07:17 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	davem@...emloft.net
Cc:	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: udp hash change and ipv6

Dave,

Because I do not have enough time before depature to Lima
via LAX, I cannot send a full fix for this, but anyway...

In net-2.6, __udp_lib_get_port() touches inet_sk(sk)->rcv_saddr,
which will break ipv6, I think.  We probably need to add a
extra function pointer to check is sk has wildcard rcv_saddr
for the protocol.

static udp4_is_rcvaddr_any(const struct sock *sk)
{
    return (!inet_sk(sk)->rcv_saddr);
}

static udp6_is_rcvaddr_any(const struct sock *sk)
{
    return (ipv6_addr_any(inet_sk(sk)->rcv_saddr));
}

Or something.  We may need to think about ipv6only socket
option.

Regards,

-- 
YOSHIFUJI Hideaki @ USAGI Project  <yoshfuji@...ux-ipv6.org>
GPG-FP  : 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA
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