linux-kernel - Re: [TOMOYO #5 11/18] Network access control functions.

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Date:	Sat, 17 Nov 2007 02:57:08 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	penguin-kernel@...ove.SAKURA.ne.jp
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, takedakn@...data.co.jp,
	yoshfuji@...ux-ipv6.org
Subject: Re: [TOMOYO #5 11/18] Network access control functions.

Hello.

In article <20071116173527.282964575@...ove.SAKURA.ne.jp> (at Sat, 17 Nov 2007 02:34:50 +0900), penguin-kernel@...ove.SAKURA.ne.jp says:

> +	*cp++ = '\0';
> +	count = sscanf(cp,
> +		       NIP6_FMT "-" NIP6_FMT,
> +		       &min[0], &min[1], &min[2], &min[3],
> +		       &min[4], &min[5], &min[6], &min[7],
> +		       &max[0], &max[1], &max[2], &max[3],
> +		       &max[4], &max[5], &max[6], &max[7]);
> +

I think you can use in6_pton() here.

> +	count = sscanf(cp,
> +		       NIPQUAD_FMT "-" NIPQUAD_FMT,
> +		       &min[0], &min[1],
> +		       &min[2], &min[3],
> +		       &max[0], &max[1],
> +		       &max[2], &max[3]);
> +

in4_pton().

> +
> +/**
> + * tmy_print_ipv6 - print ipv6 address
> + * @buffer:     pointer to buffer to save the result.
> + * @buffer_len: sizeof @buffer .
> + * @ip:         pointer to an IPv6 address in network byte order.
> + *
> + * Returns @buffer .
> + */
> +char *tmy_print_ipv6(char *buffer, const int buffer_len, const u16 *ip)
> +{
> +	memset(buffer, 0, buffer_len);
> +	snprintf(buffer, buffer_len - 1, NIP6_FMT,
> +		 ntohs(ip[0]), ntohs(ip[1]), ntohs(ip[2]), ntohs(ip[3]),
> +		 ntohs(ip[4]), ntohs(ip[5]), ntohs(ip[6]), ntohs(ip[7]));
> +	return buffer;
> +}
> +

snprintf(buffer, buffer_len - 1, NIP6_FMT, NIP6(*(struct in6_addr *)ip));

> +	count = sscanf(cp2,
> +		       NIP6_FMT "-" NIP6_FMT,
> +		       &min[0], &min[1], &min[2], &min[3],
> +		       &min[4], &min[5], &min[6], &min[7],
> +		       &max[0], &max[1], &max[2], &max[3],
> +		       &max[4], &max[5], &max[6], &max[7]);
> +

again, in6_pton().

> +	count = sscanf(cp2,
> +		       NIPQUAD_FMT "-" NIPQUAD_FMT,
> +		       &min[0], &min[1], &min[2], &min[3],
> +		       &max[0], &max[1], &max[2], &max[3]);
> +

in4_pton().

--yoshfuji
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