netdev - Re: [PATCH] IPv6: Fix the data length of get destination options with short length

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Message-Id: <20080529.174208.119722724.yoshfuji@linux-ipv6.org>
Date:	Thu, 29 May 2008 17:42:08 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	yanghy@...fujitsu.com
Cc:	davem@...set.davemloft.net, yjwei@...fujitsu.com,
	netdev@...r.kernel.org, wangchen@...fujitsu.com,
	yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH] IPv6: Fix the data length of get destination options
 with short length

In article <483E151B.2000804@...fujitsu.com> (at Thu, 29 May 2008 10:29:47 +0800), Yang Hongyang <yanghy@...fujitsu.com> says:

> YOSHIFUJI Hideaki / 吉藤英明 wrote:
> 
> > POSIX says that the object pointed to by the option_len argument shall be
> > modified to indicate the actual length of the value.
> > Do you think this change conforms to the spec?
> > 
> 
> We use the codes below to get the destination options,the length cnt is half of the option length.
:

Well, actually I reread the spec., and I've found that option_len is
undefined if option_len is not enough for the value.
Current behavior seems okay (according to the spec.), but I'm going to apply
this for consistency with other sockopts if no objections.

--yoshfuji
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