On Tue, 16 Sep 2008, Paul Moore wrote:
> +/* Base length of the local tag (non-standard tag).
> + * Tag definition (may change between kernel versions)
> + *
> + * 0 8 16 24 32
> + * +----------+----------+----------+----------+
> + * | 10000000 | 00001000 | unused (zero fill) |
> + * +----------+----------+----------+----------+
> + * | 32-bit secid value (host byte order) |
> + * +----------+----------+----------+----------+
> + *
> + */
> +#define CIPSO_V4_TAG_LOC_BLEN 8
> +
> +static int cipso_v4_gentag_loc(const struct cipso_v4_doi *doi_def,
> + const struct netlbl_lsm_secattr *secattr,
> + unsigned char *buffer,
> + u32 buffer_len)
> +{
> + if (!(secattr->flags & NETLBL_SECATTR_SECID))
> + return -EPERM;
> +
> + buffer[0] = 0x80;
> + buffer[1] = 0x08;
> + *(u32 *)&buffer[4] = secattr->attr.secid;
> +
> + return 8;
> +}
Macros would be nice for these, and why specify zero filling? (Setting
and testing that would be wasted cycles, if you enforced it).
- James
--
James Morris
<jmorris@xxxxxxxxx>
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