Re: [PATCH] IPv6: Allow Both IPv6 and IPv4 Sockets on the Same Port Number (IPV6_V6ONLY Support)

acme@conectiva.com.br
Thu, 03 Oct 2002 00:53:01 -0300 (BRST)


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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