diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2019-02-07 22:18:19 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-02-08 13:51:50 +0100 |
| commit | c17e28d1bcd357219264aaab37d5daba8181f9d3 (patch) | |
| tree | 6f092975cfa79de940b718ebe0c33ff4665531a1 /net/mac80211 | |
| parent | cfg80211: add and use strongly typed element iteration macros (diff) | |
| download | linux-dev-c17e28d1bcd357219264aaab37d5daba8181f9d3.tar.xz linux-dev-c17e28d1bcd357219264aaab37d5daba8181f9d3.zip | |
mac80211: use element iteration macro in parsing
Instead of open-coding the element walk, use the new macro.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/util.c | 25 |
1 files changed, 6 insertions, 19 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c index d0eb38b890aa..7fa9ba197c26 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -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; |