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ie: Add parsine of Group Management Cipher field

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This commit is contained in:
Denis Kenzior 2015-01-20 00:30:54 -06:00
parent d7cd5dbae7
commit 8a4e135bc8
1 changed files with 40 additions and 0 deletions
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40
src/ie.c
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@ -320,6 +320,27 @@ static bool ie_parse_pairwise_cipher(const uint8_t *data,
return true; return true;
} }
static bool ie_parse_group_management_cipher(const uint8_t *data,
enum ie_rsn_cipher_suite *out)
{
enum ie_rsn_cipher_suite tmp;
bool r = ie_parse_cipher_suite(data, &tmp);
if (!r)
return r;
switch (tmp) {
case IE_RSN_CIPHER_SUITE_BIP:
break;
default:
return false;
}
*out = tmp;
return true;
}
#define RSNE_ADVANCE(data, len, step) \ #define RSNE_ADVANCE(data, len, step) \
data += step; \ data += step; \
len -= step; \ len -= step; \
@ -434,6 +455,13 @@ int ie_parse_rsne(struct ie_tlv_iter *iter, struct ie_rsn_info *out_info)
RSNE_ADVANCE(data, len, 2); RSNE_ADVANCE(data, len, 2);
/*
* BIP—default group management cipher suite in an RSNA with
* management frame protection enabled
*/
if (info.mfpc)
info.group_management_cipher = IE_RSN_CIPHER_SUITE_BIP;
/* Parse PMKID Count field */ /* Parse PMKID Count field */
if (len < 2) if (len < 2)
return -EBADMSG; return -EBADMSG;
@ -455,6 +483,18 @@ int ie_parse_rsne(struct ie_tlv_iter *iter, struct ie_rsn_info *out_info)
RSNE_ADVANCE(data, len, info.num_pmkids * 16); RSNE_ADVANCE(data, len, info.num_pmkids * 16);
} }
/* Parse Group Management Cipher Suite field */
if (len < 4)
return -EBADMSG;
if (!ie_parse_group_management_cipher(data,
&info.group_management_cipher))
return -ERANGE;
RSNE_ADVANCE(data, len, 4);
return -EBADMSG;
done: done:
if (out_info) if (out_info)
memcpy(out_info, &info, sizeof(info)); memcpy(out_info, &info, sizeof(info));