diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c index db9176d..857b328 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c @@ -247,6 +247,13 @@ static const u32 __wl_cipher_suites[] = { WLAN_CIPHER_SUITE_AES_CMAC, }; +/* tag_ID/length/value_buffer tuple */ +struct brcmf_tlv { + u8 id; + u8 len; + u8 data[1]; +}; + /* Quarter dBm units to mW * Table starts at QDBM_OFFSET, so the first entry is mW for qdBm=153 * Table is offset so the last entry is largest mW value that fits in @@ -2151,11 +2158,39 @@ static bool brcmf_is_ibssmode(struct brcmf_cfg80211_priv *cfg_priv) return cfg_priv->conf->mode == WL_MODE_IBSS; } +/* + * Traverse a string of 1-byte tag/1-byte length/variable-length value + * triples, returning a pointer to the substring whose first element + * matches tag + */ +static struct brcmf_tlv *brcmf_parse_tlvs(void *buf, int buflen, uint key) +{ + struct brcmf_tlv *elt; + int totlen; + + elt = (struct brcmf_tlv *) buf; + totlen = buflen; + + /* find tagged parameter */ + while (totlen >= 2) { + int len = elt->len; + + /* validate remaining totlen */ + if ((elt->id == key) && (totlen >= (len + 2))) + return elt; + + elt = (struct brcmf_tlv *) ((u8 *) elt + (len + 2)); + totlen -= (len + 2); + } + + return NULL; +} + static s32 brcmf_update_bss_info(struct brcmf_cfg80211_priv *cfg_priv) { struct brcmf_bss_info *bi; struct brcmf_ssid *ssid; - struct brcmu_tlv *tim; + struct brcmf_tlv *tim; u16 beacon_interval; u8 dtim_period; size_t ie_len; @@ -2185,7 +2220,7 @@ static s32 brcmf_update_bss_info(struct brcmf_cfg80211_priv *cfg_priv) ie_len = le32_to_cpu(bi->ie_length); beacon_interval = le16_to_cpu(bi->beacon_period); - tim = brcmu_parse_tlvs(ie, ie_len, WLAN_EID_TIM); + tim = brcmf_parse_tlvs(ie, ie_len, WLAN_EID_TIM); if (tim) dtim_period = tim->data[1]; else { |