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To: YOSHIFUJI@conectiva.com.br, UNEXPECTED_DATA_AFTER_ADDRESS@.SYNTAX-ERROR
Subject: Re: [PATCH] IPv6: Allow Both IPv6 and IPv4 Sockets on the Same Port Number (IPV6_V6ONLY Support)
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Date: Thu, 03 Oct 2002 00:53:01 -0300 (BRST)
From: acme@conectiva.com.br
Cc: linux-kernel@vger.kernel.org, netdev@oss.sgi.com, usagi@linux-ipv6.org
References: <20021003.121350.119660876.yoshfuji@linux-ipv6.org>
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Quoting YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>: 
 
> +#define IN6_IS_ADDR_V4MAPPED(a)				\ 
> +	((((a)->s6_addr32[0]) == 0) &&			\ 
> +	 (((a)->s6_addr32[1]) == 0) &&			\ 
> +	 (((a)->s6_addr32[2]) == __constant_htonl(0x0000ffff))) 
 
Please use plain htonl, __constant_htonl is only needed in static 
initializations, in all other cases with constants as a parameter it 
generates the same code as htonl, so lets prefer using the shorter, 
more readable format. 
 
- Arnaldo 
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