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mac80211: use element iteration macro in parsing

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Instead of open-coding the element walk, use the new macro.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2019-02-07 22:18:19 +01:00
parent 0f3b07f027
commit c17e28d1bc
1 changed files with 6 additions and 19 deletions
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25
net/mac80211/util.c
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@ -895,8 +895,7 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
struct ieee802_11_elems *elems,
u64 filter, u32 crc)
{
size_t left = len;
const u8 *pos = start;
struct element *elem;
bool calc_crc = filter != 0;
DECLARE_BITMAP(seen_elems, 256);
const u8 *ie;
@ -906,18 +905,11 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elems->ie_start = start;
elems->total_len = len;
while (left >= 2) {
u8 id, elen;
for_each_element(elem, start, len) {
bool elem_parse_failed;
id = *pos++;
elen = *pos++;
left -= 2;
if (elen > left) {
elems->parse_error = true;
break;
}
u8 id = elem->id;
u8 elen = elem->datalen;
const u8 *pos = elem->data;
switch (id) {
case WLAN_EID_SSID:
@ -960,8 +952,6 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
*/
if (test_bit(id, seen_elems)) {
elems->parse_error = true;
left -= elen;
pos += elen;
continue;
}
break;
@ -1244,12 +1234,9 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elems->parse_error = true;
else
__set_bit(id, seen_elems);
left -= elen;
pos += elen;
}
if (left != 0)
if (!for_each_element_completed(elem, start, len))
elems->parse_error = true;
return crc;