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Simplify VHT Capabilities element parsing

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Check the element length in the parser and remove the length field from
struct ieee802_11_elems since the element is of fixed length.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-04-19 17:00:45 +03:00
parent baae4cb9b4
commit 40baac0e43
8 changed files with 9 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/rsn_supp/tdls.c
View file

@ -1603,9 +1603,7 @@ static int copy_peer_ht_capab(const struct wpa_eapol_ie_parse *kde,
static int copy_peer_vht_capab(const struct wpa_eapol_ie_parse *kde,
struct wpa_tdls_peer *peer)
{
if (!kde->vht_capabilities ||
kde->vht_capabilities_len <
sizeof(struct ieee80211_vht_capabilities) ) {
if (!kde->vht_capabilities) {
wpa_printf(MSG_DEBUG, "TDLS: No supported vht capabilities "
"received");
return 0;

5
src/rsn_supp/wpa_ie.c
View file

@ -559,9 +559,10 @@ int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
} else if (*pos == WLAN_EID_VHT_AID) {
if (pos[1] >= 2)
ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff;
} else if (*pos == WLAN_EID_VHT_CAP) {
} else if (*pos == WLAN_EID_VHT_CAP &&
pos[1] >= sizeof(struct ieee80211_vht_capabilities))
{
ie->vht_capabilities = pos + 2;
ie->vht_capabilities_len = pos[1];
} else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
ie->qosinfo = pos[2];
} else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {

1
src/rsn_supp/wpa_ie.h
View file

@ -51,7 +51,6 @@ struct wpa_eapol_ie_parse {
size_t ext_supp_rates_len;
const u8 *ht_capabilities;
const u8 *vht_capabilities;
size_t vht_capabilities_len;
const u8 *supp_channels;
size_t supp_channels_len;
const u8 *supp_oper_classes;