mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
mwifiex: separate out response buffer parsing code
This new function will be useful later for extended scan feature. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Amitkumar Karwar
John W. Linville
parent
b8b3ecec91
commit
3b4d5c6442
@ -1576,6 +1576,156 @@ done:
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
|
||||
u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
|
||||
bool ext_scan)
|
||||
{
|
||||
struct mwifiex_adapter *adapter = priv->adapter;
|
||||
struct mwifiex_chan_freq_power *cfp;
|
||||
struct cfg80211_bss *bss;
|
||||
u8 bssid[ETH_ALEN];
|
||||
s32 rssi;
|
||||
const u8 *ie_buf;
|
||||
size_t ie_len;
|
||||
u16 channel = 0;
|
||||
u16 beacon_size = 0;
|
||||
u32 curr_bcn_bytes;
|
||||
u32 freq;
|
||||
u16 beacon_period;
|
||||
u16 cap_info_bitmap;
|
||||
u8 *current_ptr;
|
||||
u64 timestamp;
|
||||
struct mwifiex_fixed_bcn_param *bcn_param;
|
||||
struct mwifiex_bss_priv *bss_priv;
|
||||
|
||||
if (*bytes_left >= sizeof(beacon_size)) {
|
||||
/* Extract & convert beacon size from command buffer */
|
||||
memcpy(&beacon_size, *bss_info, sizeof(beacon_size));
|
||||
*bytes_left -= sizeof(beacon_size);
|
||||
*bss_info += sizeof(beacon_size);
|
||||
}
|
||||
|
||||
if (!beacon_size || beacon_size > *bytes_left) {
|
||||
*bss_info += *bytes_left;
|
||||
*bytes_left = 0;
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
/* Initialize the current working beacon pointer for this BSS
|
||||
* iteration
|
||||
*/
|
||||
current_ptr = *bss_info;
|
||||
|
||||
/* Advance the return beacon pointer past the current beacon */
|
||||
*bss_info += beacon_size;
|
||||
*bytes_left -= beacon_size;
|
||||
|
||||
curr_bcn_bytes = beacon_size;
|
||||
|
||||
/* First 5 fields are bssid, RSSI(for legacy scan only),
|
||||
* time stamp, beacon interval, and capability information
|
||||
*/
|
||||
if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
|
||||
sizeof(struct mwifiex_fixed_bcn_param)) {
|
||||
dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
memcpy(bssid, current_ptr, ETH_ALEN);
|
||||
current_ptr += ETH_ALEN;
|
||||
curr_bcn_bytes -= ETH_ALEN;
|
||||
|
||||
if (!ext_scan) {
|
||||
rssi = (s32) *(u8 *)current_ptr;
|
||||
rssi = (-rssi) * 100; /* Convert dBm to mBm */
|
||||
current_ptr += sizeof(u8);
|
||||
curr_bcn_bytes -= sizeof(u8);
|
||||
dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
|
||||
}
|
||||
|
||||
bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
|
||||
current_ptr += sizeof(*bcn_param);
|
||||
curr_bcn_bytes -= sizeof(*bcn_param);
|
||||
|
||||
timestamp = le64_to_cpu(bcn_param->timestamp);
|
||||
beacon_period = le16_to_cpu(bcn_param->beacon_period);
|
||||
|
||||
cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
|
||||
dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
|
||||
cap_info_bitmap);
|
||||
|
||||
/* Rest of the current buffer are IE's */
|
||||
ie_buf = current_ptr;
|
||||
ie_len = curr_bcn_bytes;
|
||||
dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP = %d\n",
|
||||
curr_bcn_bytes);
|
||||
|
||||
while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
|
||||
u8 element_id, element_len;
|
||||
|
||||
element_id = *current_ptr;
|
||||
element_len = *(current_ptr + 1);
|
||||
if (curr_bcn_bytes < element_len +
|
||||
sizeof(struct ieee_types_header)) {
|
||||
dev_err(adapter->dev,
|
||||
"%s: bytes left < IE length\n", __func__);
|
||||
return -EFAULT;
|
||||
}
|
||||
if (element_id == WLAN_EID_DS_PARAMS) {
|
||||
channel = *(current_ptr +
|
||||
sizeof(struct ieee_types_header));
|
||||
break;
|
||||
}
|
||||
|
||||
current_ptr += element_len + sizeof(struct ieee_types_header);
|
||||
curr_bcn_bytes -= element_len +
|
||||
sizeof(struct ieee_types_header);
|
||||
}
|
||||
|
||||
if (channel) {
|
||||
struct ieee80211_channel *chan;
|
||||
u8 band;
|
||||
|
||||
/* Skip entry if on csa closed channel */
|
||||
if (channel == priv->csa_chan) {
|
||||
dev_dbg(adapter->dev,
|
||||
"Dropping entry on csa closed channel\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
band = BAND_G;
|
||||
if (radio_type)
|
||||
band = mwifiex_radio_type_to_band(*radio_type &
|
||||
(BIT(0) | BIT(1)));
|
||||
|
||||
cfp = mwifiex_get_cfp(priv, band, channel, 0);
|
||||
|
||||
freq = cfp ? cfp->freq : 0;
|
||||
|
||||
chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
|
||||
|
||||
if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
|
||||
bss = cfg80211_inform_bss(priv->wdev->wiphy,
|
||||
chan, bssid, timestamp,
|
||||
cap_info_bitmap, beacon_period,
|
||||
ie_buf, ie_len, rssi, GFP_KERNEL);
|
||||
bss_priv = (struct mwifiex_bss_priv *)bss->priv;
|
||||
bss_priv->band = band;
|
||||
bss_priv->fw_tsf = fw_tsf;
|
||||
if (priv->media_connected &&
|
||||
!memcmp(bssid, priv->curr_bss_params.bss_descriptor
|
||||
.mac_address, ETH_ALEN))
|
||||
mwifiex_update_curr_bss_params(priv, bss);
|
||||
cfg80211_put_bss(priv->wdev->wiphy, bss);
|
||||
}
|
||||
} else {
|
||||
dev_dbg(adapter->dev, "missing BSS channel IE\n");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function handles the command response of scan.
|
||||
*
|
||||
@ -1609,12 +1759,12 @@ int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
|
||||
u32 bytes_left;
|
||||
u32 idx;
|
||||
u32 tlv_buf_size;
|
||||
struct mwifiex_chan_freq_power *cfp;
|
||||
struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
|
||||
struct chan_band_param_set *chan_band;
|
||||
u8 is_bgscan_resp;
|
||||
unsigned long flags;
|
||||
struct cfg80211_bss *bss;
|
||||
__le64 fw_tsf = 0;
|
||||
u8 *radio_type;
|
||||
|
||||
is_bgscan_resp = (le16_to_cpu(resp->command)
|
||||
== HostCmd_CMD_802_11_BG_SCAN_QUERY);
|
||||
@ -1676,107 +1826,6 @@ int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
|
||||
&chan_band_tlv);
|
||||
|
||||
for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
|
||||
u8 bssid[ETH_ALEN];
|
||||
s32 rssi;
|
||||
const u8 *ie_buf;
|
||||
size_t ie_len;
|
||||
u16 channel = 0;
|
||||
__le64 fw_tsf = 0;
|
||||
u16 beacon_size = 0;
|
||||
u32 curr_bcn_bytes;
|
||||
u32 freq;
|
||||
u16 beacon_period;
|
||||
u16 cap_info_bitmap;
|
||||
u8 *current_ptr;
|
||||
u64 timestamp;
|
||||
struct mwifiex_fixed_bcn_param *bcn_param;
|
||||
struct mwifiex_bss_priv *bss_priv;
|
||||
|
||||
if (bytes_left >= sizeof(beacon_size)) {
|
||||
/* Extract & convert beacon size from command buffer */
|
||||
memcpy(&beacon_size, bss_info, sizeof(beacon_size));
|
||||
bytes_left -= sizeof(beacon_size);
|
||||
bss_info += sizeof(beacon_size);
|
||||
}
|
||||
|
||||
if (!beacon_size || beacon_size > bytes_left) {
|
||||
bss_info += bytes_left;
|
||||
bytes_left = 0;
|
||||
ret = -1;
|
||||
goto check_next_scan;
|
||||
}
|
||||
|
||||
/* Initialize the current working beacon pointer for this BSS
|
||||
* iteration */
|
||||
current_ptr = bss_info;
|
||||
|
||||
/* Advance the return beacon pointer past the current beacon */
|
||||
bss_info += beacon_size;
|
||||
bytes_left -= beacon_size;
|
||||
|
||||
curr_bcn_bytes = beacon_size;
|
||||
|
||||
/* First 5 fields are bssid, RSSI(for legacy scan only),
|
||||
* time stamp, beacon interval, and capability information
|
||||
*/
|
||||
if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
|
||||
sizeof(struct mwifiex_fixed_bcn_param)) {
|
||||
dev_err(adapter->dev,
|
||||
"InterpretIE: not enough bytes left\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
memcpy(bssid, current_ptr, ETH_ALEN);
|
||||
current_ptr += ETH_ALEN;
|
||||
curr_bcn_bytes -= ETH_ALEN;
|
||||
|
||||
rssi = (s32) *(u8 *)current_ptr;
|
||||
rssi = (-rssi) * 100; /* Convert dBm to mBm */
|
||||
current_ptr += sizeof(u8);
|
||||
curr_bcn_bytes -= sizeof(u8);
|
||||
dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
|
||||
|
||||
bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
|
||||
current_ptr += sizeof(*bcn_param);
|
||||
curr_bcn_bytes -= sizeof(*bcn_param);
|
||||
|
||||
timestamp = le64_to_cpu(bcn_param->timestamp);
|
||||
beacon_period = le16_to_cpu(bcn_param->beacon_period);
|
||||
|
||||
cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
|
||||
dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
|
||||
cap_info_bitmap);
|
||||
|
||||
/* Rest of the current buffer are IE's */
|
||||
ie_buf = current_ptr;
|
||||
ie_len = curr_bcn_bytes;
|
||||
dev_dbg(adapter->dev,
|
||||
"info: InterpretIE: IELength for this AP = %d\n",
|
||||
curr_bcn_bytes);
|
||||
|
||||
while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
|
||||
u8 element_id, element_len;
|
||||
|
||||
element_id = *current_ptr;
|
||||
element_len = *(current_ptr + 1);
|
||||
if (curr_bcn_bytes < element_len +
|
||||
sizeof(struct ieee_types_header)) {
|
||||
dev_err(priv->adapter->dev,
|
||||
"%s: bytes left < IE length\n",
|
||||
__func__);
|
||||
goto check_next_scan;
|
||||
}
|
||||
if (element_id == WLAN_EID_DS_PARAMS) {
|
||||
channel = *(current_ptr + sizeof(struct ieee_types_header));
|
||||
break;
|
||||
}
|
||||
|
||||
current_ptr += element_len +
|
||||
sizeof(struct ieee_types_header);
|
||||
curr_bcn_bytes -= element_len +
|
||||
sizeof(struct ieee_types_header);
|
||||
}
|
||||
|
||||
/*
|
||||
* If the TSF TLV was appended to the scan results, save this
|
||||
* entry's TSF value in the fw_tsf field. It is the firmware's
|
||||
@ -1787,51 +1836,19 @@ int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
|
||||
memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
|
||||
sizeof(fw_tsf));
|
||||
|
||||
if (channel) {
|
||||
struct ieee80211_channel *chan;
|
||||
u8 band;
|
||||
|
||||
/* Skip entry if on csa closed channel */
|
||||
if (channel == priv->csa_chan) {
|
||||
dev_dbg(adapter->dev,
|
||||
"Dropping entry on csa closed channel\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
band = BAND_G;
|
||||
if (chan_band_tlv) {
|
||||
chan_band =
|
||||
&chan_band_tlv->chan_band_param[idx];
|
||||
band = mwifiex_radio_type_to_band(
|
||||
chan_band->radio_type
|
||||
& (BIT(0) | BIT(1)));
|
||||
}
|
||||
|
||||
cfp = mwifiex_get_cfp(priv, band, channel, 0);
|
||||
|
||||
freq = cfp ? cfp->freq : 0;
|
||||
|
||||
chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
|
||||
|
||||
if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
|
||||
bss = cfg80211_inform_bss(priv->wdev->wiphy,
|
||||
chan, bssid, timestamp,
|
||||
cap_info_bitmap, beacon_period,
|
||||
ie_buf, ie_len, rssi, GFP_KERNEL);
|
||||
bss_priv = (struct mwifiex_bss_priv *)bss->priv;
|
||||
bss_priv->band = band;
|
||||
bss_priv->fw_tsf = le64_to_cpu(fw_tsf);
|
||||
if (priv->media_connected &&
|
||||
!memcmp(bssid,
|
||||
priv->curr_bss_params.bss_descriptor
|
||||
.mac_address, ETH_ALEN))
|
||||
mwifiex_update_curr_bss_params(priv,
|
||||
bss);
|
||||
cfg80211_put_bss(priv->wdev->wiphy, bss);
|
||||
}
|
||||
if (chan_band_tlv) {
|
||||
chan_band = &chan_band_tlv->chan_band_param[idx];
|
||||
radio_type = &chan_band->radio_type;
|
||||
} else {
|
||||
dev_dbg(adapter->dev, "missing BSS channel IE\n");
|
||||
radio_type = NULL;
|
||||
}
|
||||
|
||||
ret = mwifiex_parse_single_response_buf(priv, &bss_info,
|
||||
&bytes_left,
|
||||
le64_to_cpu(fw_tsf),
|
||||
radio_type, false);
|
||||
if (ret)
|
||||
goto check_next_scan;
|
||||
}
|
||||
|
||||
check_next_scan:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user