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| author | Eliad Peller <eliad@wizery.com> | 2011-09-15 11:53:01 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-09-19 15:49:11 -0400 |
| commit | 0c28ec587a2f061b93a98ac02a53b4152cbe48f4 (patch) | |
| tree | fa65521de60bc77f44eee5c0314543108f856c9c /net/wireless | |
| parent | 6e82bc4a5bf3a1ce597324c8667baa6a2ed12604 (diff) | |
| download | linux-0c28ec587a2f061b93a98ac02a53b4152cbe48f4.tar.gz linux-0c28ec587a2f061b93a98ac02a53b4152cbe48f4.tar.bz2 linux-0c28ec587a2f061b93a98ac02a53b4152cbe48f4.zip | |
cfg80211: add cfg80211_find_vendor_ie() function
Add function to find vendor-specific ie (along with
vendor-specific ie struct definition and P2P OUI values)
Signed-off-by: Eliad Peller <eliad@wizery.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless')
| -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 b0f003966953..0fb142410404 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); |