diff options
Diffstat (limited to 'net/wireless/scan.c')
| -rw-r--r-- | net/wireless/scan.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c index b0f00396695..0fb14241040 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -228,6 +228,33 @@ const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) } EXPORT_SYMBOL(cfg80211_find_ie); +const u8 *cfg80211_find_vendor_ie(unsigned int oui, u8 oui_type, + const u8 *ies, int len) +{ + struct ieee80211_vendor_ie *ie; + const u8 *pos = ies, *end = ies + len; + int ie_oui; + + while (pos < end) { + pos = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, pos, + end - pos); + if (!pos) + return NULL; + + if (end - pos < sizeof(*ie)) + return NULL; + + ie = (struct ieee80211_vendor_ie *)pos; + ie_oui = ie->oui[0] << 16 | ie->oui[1] << 8 | ie->oui[2]; + if (ie_oui == oui && ie->oui_type == oui_type) + return pos; + + pos += 2 + ie->len; + } + return NULL; +} +EXPORT_SYMBOL(cfg80211_find_vendor_ie); + static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) { const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); |