blob: 73630b9a2e5e138e463a5e7288e8fa2282d90296 [file] [log] [blame]
/*
* Copyright (c) 2012-2017 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This file was originally distributed by Qualcomm Atheros, Inc.
* under proprietary terms before Copyright ownership was assigned
* to the Linux Foundation.
*/
/**========================================================================
\file wlan_hdd_scan.c
\brief WLAN Host Device Driver implementation
========================================================================*/
/**=========================================================================
EDIT HISTORY FOR FILE
This section contains comments describing changes made to the module.
Notice that changes are listed in reverse chronological order.
$Header:$ $DateTime: $ $Author: $
when who what, where, why
-------- --- --------------------------------------------------------
04/5/09 Shailender Created module.
==========================================================================*/
/* To extract the Scan results */
/* Add a stream event */
#include <wlan_qct_driver.h>
#include <wlan_hdd_includes.h>
#include <vos_api.h>
#include <palTypes.h>
#include <aniGlobal.h>
#include <dot11f.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <vos_sched.h>
#define WEXT_CSCAN_HEADER "CSCAN S\x01\x00\x00S\x00"
#define WEXT_CSCAN_HEADER_SIZE 12
#define WEXT_CSCAN_SSID_SECTION 'S'
#define WEXT_CSCAN_CHANNEL_SECTION 'C'
#define WEXT_CSCAN_NPROBE_SECTION 'N'
#define WEXT_CSCAN_ACTV_DWELL_SECTION 'A'
#define WEXT_CSCAN_PASV_DWELL_SECTION 'P'
#define WEXT_CSCAN_HOME_DWELL_SECTION 'H'
#define WEXT_CSCAN_TYPE_SECTION 'T'
#define WEXT_CSCAN_PENDING_SECTION 'O'
#define WEXT_CSCAN_TYPE_DEFAULT 0
#define WEXT_CSCAN_TYPE_PASSIVE 1
#define WEXT_CSCAN_PASV_DWELL_TIME 130
#define WEXT_CSCAN_PASV_DWELL_TIME_DEF 250
#define WEXT_CSCAN_PASV_DWELL_TIME_MAX 3000
#define WEXT_CSCAN_HOME_DWELL_TIME 130
#define MAX_RATES 12
#define WEXT_CSCAN_SCAN_DONE_WAIT_TIME 2000
typedef struct hdd_scan_info{
struct net_device *dev;
struct iw_request_info *info;
char *start;
char *end;
} hdd_scan_info_t, *hdd_scan_info_tp;
static v_S31_t hdd_TranslateABGRateToMbpsRate(v_U8_t *pFcRate)
{
/** Slightly more sophisticated processing has to take place here.
Basic rates are rounded DOWN. HT rates are rounded UP.*/
return ( (( ((v_S31_t) *pFcRate) & 0x007f) * 1000000) / 2);
}
static eHalStatus hdd_AddIwStreamEvent(int cmd, int length, char* data, hdd_scan_info_t *pscanInfo, char **last_event, char **current_event )
{
struct iw_event event;
*last_event = *current_event;
vos_mem_zero(&event, sizeof (struct iw_event));
event.cmd = cmd;
event.u.data.flags = 1;
event.u.data.length = length;
*current_event = iwe_stream_add_point (pscanInfo->info,*current_event, pscanInfo->end, &event, data);
if(*last_event == *current_event)
{
/* no space to add event */
hddLog( LOGE, "%s: no space left to add event", __func__);
return -E2BIG; /* Error code, may be E2BIG */
}
return 0;
}
/**---------------------------------------------------------------------------
\brief hdd_GetWPARSNIEs() -
This function extract the WPA/RSN IE from the Bss descriptor IEs fields
\param - ieFields - Pointer to the Bss Descriptor IEs.
- ie_length - IE Length.
- last_event -Points to the last event.
- current_event - Points to the
\return - 0 for success, non zero for failure
--------------------------------------------------------------------------*/
/* Extract the WPA and/or RSN IEs */
static eHalStatus hdd_GetWPARSNIEs( v_U8_t *ieFields, v_U16_t ie_length, char **last_event, char **current_event, hdd_scan_info_t *pscanInfo )
{
v_U8_t eid, elen, *element;
v_U16_t tie_length=0;
ENTER();
element = ieFields;
tie_length = ie_length;
while( tie_length > 2 && element != NULL )
{
eid = element[0];
elen = element[1];
/*If element length is greater than total remaining ie length,
*break the loop*/
if ((elen+2) > tie_length)
break;
switch(eid)
{
case DOT11F_EID_WPA:
case DOT11F_EID_RSN:
#ifdef FEATURE_WLAN_WAPI
case DOT11F_EID_WAPI:
#endif
if(hdd_AddIwStreamEvent( IWEVGENIE, elen+2, (char*)element, pscanInfo, last_event, current_event ) < 0 )
return -E2BIG;
break;
default:
break;
}
/* Next element */
tie_length -= (2 + elen);
element += 2 + elen;
}
return 0;
}
/**---------------------------------------------------------------------------
\brief hdd_IndicateScanResult() -
This function returns the scan results to the wpa_supplicant
\param - scanInfo - Pointer to the scan info structure.
- descriptor - Pointer to the Bss Descriptor.
\return - 0 for success, non zero for failure
--------------------------------------------------------------------------*/
#define MAX_CUSTOM_LEN 64
static eHalStatus hdd_IndicateScanResult(hdd_scan_info_t *scanInfo, tCsrScanResultInfo *scan_result)
{
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(scanInfo->dev) ;
tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
tSirBssDescription *descriptor = &scan_result->BssDescriptor;
struct iw_event event;
char *current_event = scanInfo->start;
char *end = scanInfo->end;
char *last_event;
char *current_pad;
v_U16_t ie_length = 0;
v_U16_t capabilityInfo;
char *modestr;
int error;
char custom[MAX_CUSTOM_LEN];
char *p;
hddLog( LOG1, "hdd_IndicateScanResult " MAC_ADDRESS_STR,
MAC_ADDR_ARRAY(descriptor->bssId));
error = 0;
last_event = current_event;
vos_mem_zero(&event, sizeof (event));
/* BSSID */
event.cmd = SIOCGIWAP;
event.u.ap_addr.sa_family = ARPHRD_ETHER;
vos_mem_copy (event.u.ap_addr.sa_data, descriptor->bssId,
sizeof (descriptor->bssId));
current_event = iwe_stream_add_event(scanInfo->info,current_event, end,
&event, IW_EV_ADDR_LEN);
if (last_event == current_event)
{
/* no space to add event */
/* Error code may be E2BIG */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWAP ");
return -E2BIG;
}
last_event = current_event;
vos_mem_zero(&event, sizeof (struct iw_event));
/* Protocol Name */
event.cmd = SIOCGIWNAME;
switch (descriptor->nwType)
{
case eSIR_11A_NW_TYPE:
modestr = "a";
break;
case eSIR_11B_NW_TYPE:
modestr = "b";
break;
case eSIR_11G_NW_TYPE:
modestr = "g";
break;
case eSIR_11N_NW_TYPE:
modestr = "n";
break;
default:
hddLog( LOGW, "%s: Unknown network type [%d]",
__func__, descriptor->nwType);
modestr = "?";
break;
}
snprintf(event.u.name, IFNAMSIZ, "IEEE 802.11%s", modestr);
current_event = iwe_stream_add_event(scanInfo->info,current_event, end,
&event, IW_EV_CHAR_LEN);
if (last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWNAME");
/* Error code, may be E2BIG */
return -E2BIG;
}
last_event = current_event;
vos_mem_zero( &event, sizeof (struct iw_event));
/*Freq*/
event.cmd = SIOCGIWFREQ;
event.u.freq.m = descriptor->channelId;
event.u.freq.e = 0;
event.u.freq.i = 0;
current_event = iwe_stream_add_event(scanInfo->info,current_event, end,
&event, IW_EV_FREQ_LEN);
if (last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWFREQ");
return -E2BIG;
}
last_event = current_event;
vos_mem_zero( &event, sizeof (struct iw_event));
/* BSS Mode */
event.cmd = SIOCGIWMODE;
capabilityInfo = descriptor->capabilityInfo;
if (SIR_MAC_GET_ESS(capabilityInfo))
{
event.u.mode = IW_MODE_MASTER;
}
else if (SIR_MAC_GET_IBSS(capabilityInfo))
{
event.u.mode = IW_MODE_ADHOC;
}
else
{
/* neither ESS or IBSS */
event.u.mode = IW_MODE_AUTO;
}
current_event = iwe_stream_add_event(scanInfo->info,current_event, end,
&event, IW_EV_UINT_LEN);
if (last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWMODE");
return -E2BIG;
}
/* To extract SSID */
ie_length = GET_IE_LEN_IN_BSS( descriptor->length );
if (ie_length > 0)
{
/* dot11BeaconIEs is a large struct, so we make it static to
avoid stack overflow. This API is only invoked via ioctl,
so it is serialized by the kernel rtnl_lock and hence does
not need to be reentrant */
static tDot11fBeaconIEs dot11BeaconIEs;
tDot11fIESSID *pDot11SSID;
tDot11fIESuppRates *pDot11SuppRates;
tDot11fIEExtSuppRates *pDot11ExtSuppRates;
tDot11fIEHTCaps *pDot11IEHTCaps;
int numBasicRates = 0;
int maxNumRates = 0;
pDot11IEHTCaps = NULL;
dot11fUnpackBeaconIEs ((tpAniSirGlobal)
hHal, (tANI_U8 *) descriptor->ieFields, ie_length, &dot11BeaconIEs);
pDot11SSID = &dot11BeaconIEs.SSID;
if (pDot11SSID->present ) {
last_event = current_event;
vos_mem_zero (&event, sizeof (struct iw_event));
event.cmd = SIOCGIWESSID;
event.u.data.flags = 1;
event.u.data.length = scan_result->ssId.length;
current_event = iwe_stream_add_point (scanInfo->info,current_event, end,
&event, (char *)scan_result->ssId.ssId);
if(last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWESSID");
return -E2BIG;
}
}
if( hdd_GetWPARSNIEs( ( tANI_U8 *) descriptor->ieFields, ie_length, &last_event, &current_event, scanInfo ) < 0 )
{
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWESSID");
return -E2BIG;
}
last_event = current_event;
current_pad = current_event + IW_EV_LCP_LEN;
vos_mem_zero( &event, sizeof (struct iw_event));
/*Rates*/
event.cmd = SIOCGIWRATE;
pDot11SuppRates = &dot11BeaconIEs.SuppRates;
if (pDot11SuppRates->present )
{
int i;
numBasicRates = pDot11SuppRates->num_rates;
for (i=0; i<pDot11SuppRates->num_rates; i++)
{
if (0 != (pDot11SuppRates->rates[i] & 0x7F))
{
event.u.bitrate.value = hdd_TranslateABGRateToMbpsRate (
&pDot11SuppRates->rates[i]);
current_pad = iwe_stream_add_value (scanInfo->info,current_event,
current_pad, end, &event, IW_EV_PARAM_LEN);
}
}
}
pDot11ExtSuppRates = &dot11BeaconIEs.ExtSuppRates;
if (pDot11ExtSuppRates->present )
{
int i,no_of_rates;
maxNumRates = numBasicRates + pDot11ExtSuppRates->num_rates;
/* Check to make sure the total number of rates
doesn't exceed IW_MAX_BITRATES */
maxNumRates = VOS_MIN(maxNumRates , IW_MAX_BITRATES);
if((maxNumRates - numBasicRates) > MAX_RATES)
{
no_of_rates = MAX_RATES;
hddLog( LOGW, "Accessing array out of bound that array is pDot11ExtSuppRates->rates ");
}
else
{
no_of_rates = maxNumRates - numBasicRates;
}
for ( i=0; i< no_of_rates ; i++ )
{
if (0 != (pDot11ExtSuppRates->rates[i] & 0x7F))
{
event.u.bitrate.value = hdd_TranslateABGRateToMbpsRate (
&pDot11ExtSuppRates->rates[i]);
current_pad = iwe_stream_add_value (scanInfo->info,current_event,
current_pad, end, &event, IW_EV_PARAM_LEN);
}
}
}
if ((current_pad - current_event) >= IW_EV_LCP_LEN)
{
current_event = current_pad;
}
else
{
if (last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWRATE");
return -E2BIG;
}
}
last_event = current_event;
vos_mem_zero (&event, sizeof (struct iw_event));
event.cmd = SIOCGIWENCODE;
if (SIR_MAC_GET_PRIVACY(capabilityInfo))
{
event.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
}
else
{
event.u.data.flags = IW_ENCODE_DISABLED;
}
event.u.data.length = 0;
current_event = iwe_stream_add_point(scanInfo->info,current_event, end, &event, (char *)pDot11SSID->ssid);
if(last_event == current_event)
{ /* no space to add event
Error code, may be E2BIG */
hddLog( LOGE, "hdd_IndicateScanResult: no space for SIOCGIWENCODE");
return -E2BIG;
}
}
last_event = current_event;
vos_mem_zero( &event, sizeof (struct iw_event));
/*RSSI*/
event.cmd = IWEVQUAL;
event.u.qual.qual = descriptor->rssi;
event.u.qual.noise = descriptor->sinr;
event.u.qual.level = VOS_MIN ((descriptor->rssi + descriptor->sinr), 0);
event.u.qual.updated = IW_QUAL_ALL_UPDATED;
current_event = iwe_stream_add_event(scanInfo->info,current_event,
end, &event, IW_EV_QUAL_LEN);
if(last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for IWEVQUAL");
return -E2BIG;
}
/* AGE */
event.cmd = IWEVCUSTOM;
p = custom;
p += scnprintf(p, MAX_CUSTOM_LEN, " Age: %lu",
vos_timer_get_system_time() - descriptor->nReceivedTime);
event.u.data.length = p - custom;
current_event = iwe_stream_add_point (scanInfo->info,current_event, end,
&event, custom);
if(last_event == current_event)
{ /* no space to add event */
hddLog( LOGE, "hdd_IndicateScanResult: no space for IWEVCUSTOM (age)");
return -E2BIG;
}
scanInfo->start = current_event;
return 0;
}
/**---------------------------------------------------------------------------
\brief hdd_ScanRequestCallback() -
The sme module calls this callback function once it finish the scan request
and this function notifies the scan complete event to the wpa_supplicant.
\param - halHandle - Pointer to the Hal Handle.
- pContext - Pointer to the data context.
- sessionId - Session identifier
- scanId - Scan ID.
- status - CSR Status.
\return - 0 for success, non zero for failure
--------------------------------------------------------------------------*/
static eHalStatus hdd_ScanRequestCallback(tHalHandle halHandle, void *pContext,
tANI_U8 sessionId, tANI_U32 scanId,
eCsrScanStatus status)
{
struct net_device *dev = (struct net_device *) pContext;
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
union iwreq_data wrqu;
int we_event;
char *msg;
ENTER();
hddLog(LOGW,"%s called with halHandle = %pK, pContext = %pK, scanID = %d,"
" returned status = %d", __func__, halHandle, pContext,
(int) scanId, (int) status);
/* if there is a scan request pending when the wlan driver is unloaded
we may be invoked as SME flushes its pending queue. If that is the
case, the underlying net_device may have already been destroyed, so
do some quick sanity before proceeding */
if (pAdapter->dev != dev)
{
hddLog(LOGW, "%s: device mismatch %pK vs %pK",
__func__, pAdapter->dev, dev);
return eHAL_STATUS_SUCCESS;
}
/* Check the scanId */
if (pAdapter->scan_info.scanId != scanId)
{
hddLog(LOGW, "%s called with mismatched scanId pHddCtx->scan_info.scanId = %d "
"scanId = %d ", __func__, (int) pAdapter->scan_info.scanId,
(int) scanId);
}
/* Scan is no longer pending */
pAdapter->scan_info.mScanPending = VOS_FALSE;
// notify any applications that may be interested
memset(&wrqu, '\0', sizeof(wrqu));
we_event = SIOCGIWSCAN;
msg = NULL;
wireless_send_event(dev, we_event, &wrqu, msg);
EXIT();
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: exit !!!",__func__);
return eHAL_STATUS_SUCCESS;
}
/**
* __iw_set_scan() - set scan request
* @dev: Pointer to the net device.
* @info: Pointer to the iw_request_info.
* @wrqu: Pointer to the iwreq_data.
* @extra: Pointer to the data.
*
* This function process the scan request from the wpa_supplicant
* and set the scan request to the SME
*
* Return: 0 on success, error number otherwise
*/
static int __iw_set_scan(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
hdd_wext_state_t *pwextBuf = WLAN_HDD_GET_WEXT_STATE_PTR(pAdapter);
tCsrScanRequest scanRequest;
v_U32_t scanId = 0;
eHalStatus status = eHAL_STATUS_SUCCESS;
struct iw_scan_req *scanReq = (struct iw_scan_req *)extra;
hdd_adapter_t *con_sap_adapter;
uint16_t con_dfs_ch;
int ret;
ENTER();
ret = wlan_hdd_validate_context(pHddCtx);
if (0 != ret)
return ret;
/* Block All Scan during DFS operation and send null scan result */
con_sap_adapter = hdd_get_con_sap_adapter(pAdapter, true);
if (con_sap_adapter) {
con_dfs_ch = con_sap_adapter->sessionCtx.ap.operatingChannel;
if (VOS_IS_DFS_CH(con_dfs_ch)) {
hddLog(LOGW, "%s:##In DFS Master mode. Scan aborted", __func__);
return -EOPNOTSUPP;
}
}
if(pAdapter->scan_info.mScanPending == TRUE)
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:mScanPending is TRUE !!!",__func__);
return eHAL_STATUS_SUCCESS;
}
vos_mem_zero( &scanRequest, sizeof(scanRequest));
if (NULL != wrqu->data.pointer)
{
/* set scanType, active or passive */
if ((IW_SCAN_TYPE_ACTIVE == scanReq->scan_type) ||
(eSIR_ACTIVE_SCAN == pHddCtx->ioctl_scan_mode))
{
scanRequest.scanType = eSIR_ACTIVE_SCAN;
}
else
{
scanRequest.scanType = eSIR_PASSIVE_SCAN;
}
/* set bssid using sockaddr from iw_scan_req */
vos_mem_copy(scanRequest.bssid,
&scanReq->bssid.sa_data, sizeof(scanRequest.bssid) );
if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
if(scanReq->essid_len &&
(scanReq->essid_len <= SIR_MAC_MAX_SSID_LENGTH)) {
scanRequest.SSIDs.numOfSSIDs = 1;
scanRequest.SSIDs.SSIDList =( tCsrSSIDInfo *)vos_mem_malloc(sizeof(tCsrSSIDInfo));
if(scanRequest.SSIDs.SSIDList) {
scanRequest.SSIDs.SSIDList->SSID.length = scanReq->essid_len;
vos_mem_copy(scanRequest.SSIDs.SSIDList-> SSID.ssId,scanReq->essid,scanReq->essid_len);
}
else
{
scanRequest.SSIDs.numOfSSIDs = 0;
VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR, "%s: Unable to allocate memory",__func__);
VOS_ASSERT(0);
}
}
else
{
hddLog(LOGE, FL("Invalid essid length : %d"), scanReq->essid_len);
}
}
/* set min and max channel time */
scanRequest.minChnTime = scanReq->min_channel_time;
scanRequest.maxChnTime = scanReq->max_channel_time;
}
else
{
if (pHddCtx->ioctl_scan_mode == eSIR_ACTIVE_SCAN) {
/* set the scan type to active */
scanRequest.scanType = eSIR_ACTIVE_SCAN;
} else {
scanRequest.scanType = eSIR_PASSIVE_SCAN;
}
vos_mem_set( scanRequest.bssid, sizeof( tCsrBssid ), 0xff );
/* set min and max channel time to zero */
scanRequest.minChnTime = 0;
scanRequest.maxChnTime = 0;
}
/* set BSSType to default type */
scanRequest.BSSType = eCSR_BSS_TYPE_ANY;
/*Scan all the channels */
scanRequest.ChannelInfo.numOfChannels = 0;
scanRequest.ChannelInfo.ChannelList = NULL;
/* set requestType to full scan */
scanRequest.requestType = eCSR_SCAN_REQUEST_FULL_SCAN;
/* if previous genIE is not NULL, update ScanIE */
if (0 != pwextBuf->genIE.length)
{
memset( &pAdapter->scan_info.scanAddIE, 0, sizeof(pAdapter->scan_info.scanAddIE) );
memcpy( pAdapter->scan_info.scanAddIE.addIEdata, pwextBuf->genIE.addIEdata,
pwextBuf->genIE.length );
pAdapter->scan_info.scanAddIE.length = pwextBuf->genIE.length;
pwextBuf->roamProfile.pAddIEScan = pAdapter->scan_info.scanAddIE.addIEdata;
pwextBuf->roamProfile.nAddIEScanLength = pAdapter->scan_info.scanAddIE.length;
/* clear previous genIE after use it */
memset( &pwextBuf->genIE, 0, sizeof(pwextBuf->genIE) );
}
/* push addIEScan in scanRequset if exist */
if (pAdapter->scan_info.scanAddIE.length &&
(pAdapter->scan_info.scanAddIE.length <=
sizeof(pAdapter->scan_info.scanAddIE.addIEdata)))
{
scanRequest.uIEFieldLen = pAdapter->scan_info.scanAddIE.length;
scanRequest.pIEField = pAdapter->scan_info.scanAddIE.addIEdata;
}
status = sme_ScanRequest((WLAN_HDD_GET_CTX(pAdapter))->hHal,
pAdapter->sessionId, &scanRequest, &scanId,
&hdd_ScanRequestCallback, dev);
if (!HAL_STATUS_SUCCESS(status))
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:sme_ScanRequest fail %d!!!",__func__, status);
goto error;
}
pAdapter->scan_info.mScanPending = TRUE;
pAdapter->scan_info.scanId = scanId;
error:
if ((wrqu->data.flags & IW_SCAN_THIS_ESSID) && (scanReq->essid_len))
vos_mem_free(scanRequest.SSIDs.SSIDList);
EXIT();
return status;
}
/**
* iw_set_scan() - SSR wrapper for __iw_set_scan
* @dev: Pointer to the net device.
* @info: Pointer to the iw_request_info.
* @wrqu: Pointer to the iwreq_data.
* @extra: Pointer to the data.
*
* Return: 0 on success, error number otherwise
*/
int iw_set_scan(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
int ret;
vos_ssr_protect(__func__);
ret = __iw_set_scan(dev, info, wrqu, extra);
vos_ssr_unprotect(__func__);
return ret;
}
/**
* __iw_get_scan() - get scan results
* @dev: Pointer to the net device.
* @info: Pointer to the iw_request_info.
* @wrqu: Pointer to the iwreq_data.
* @extra: Pointer to the data.
*
* This function returns the scan results to the wpa_supplicant
*
* Return: 0 on success, error number otherwise
*/
static int __iw_get_scan(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
tHalHandle hHal = WLAN_HDD_GET_HAL_CTX(pAdapter);
tCsrScanResultInfo *pScanResult;
eHalStatus status = eHAL_STATUS_SUCCESS;
hdd_scan_info_t scanInfo;
tScanResultHandle pResult;
int i = 0;
hdd_context_t *hdd_ctx;
int ret;
ENTER();
hdd_ctx = WLAN_HDD_GET_CTX(pAdapter);
ret = wlan_hdd_validate_context(hdd_ctx);
if (0 != ret)
return ret;
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: enter buffer length %d!!!",
__func__, (wrqu->data.length)?wrqu->data.length:IW_SCAN_MAX_DATA);
if (TRUE == pAdapter->scan_info.mScanPending)
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:mScanPending is TRUE !!!",__func__);
return -EAGAIN;
}
scanInfo.dev = dev;
scanInfo.start = extra;
scanInfo.info = info;
if (0 == wrqu->data.length)
{
scanInfo.end = extra + IW_SCAN_MAX_DATA;
}
else
{
scanInfo.end = extra + wrqu->data.length;
}
status = sme_ScanGetResult(hHal,pAdapter->sessionId,NULL,&pResult);
if (NULL == pResult)
{
// no scan results
hddLog(LOG1,"iw_get_scan: NULL Scan Result ");
return 0;
}
pScanResult = sme_ScanResultGetFirst(hHal, pResult);
while (pScanResult)
{
status = hdd_IndicateScanResult(&scanInfo, pScanResult);
if (0 != status)
{
break;
}
i++;
pScanResult = sme_ScanResultGetNext(hHal, pResult);
}
sme_ScanResultPurge(hHal, pResult);
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: exit total %d BSS reported !!!",__func__, i);
EXIT();
return status;
}
/**
* iw_get_scan() - SSR wrapper function for __iw_get_scan
* @dev: Pointer to the net device.
* @info: Pointer to the iw_request_info.
* @wrqu: Pointer to the iwreq_data.
* @extra: Pointer to the data.
*
* Return: 0 on success, error number otherwise
*/
int iw_get_scan(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
int ret;
vos_ssr_protect(__func__);
ret = __iw_get_scan(dev, info, wrqu, extra);
vos_ssr_unprotect(__func__);
return ret;
}
#if 0
static eHalStatus hdd_CscanRequestCallback(tHalHandle halHandle, void *pContext,
tANI_U32 scanId, eCsrScanStatus status)
{
struct net_device *dev = (struct net_device *) pContext;
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
hdd_wext_state_t *pwextBuf = WLAN_HDD_GET_WEXT_STATE_PTR(pAdapter);
union iwreq_data wrqu;
int we_event;
char *msg;
VOS_STATUS vos_status = VOS_STATUS_SUCCESS;
ENTER();
hddLog(LOG1,"%s called with halHandle = %pK, pContext = %pK, scanID = %d,"
" returned status = %d", __func__, halHandle, pContext,
(int) scanId, (int) status);
/* Check the scanId */
if (pwextBuf->scanId != scanId)
{
hddLog(LOGW, "%s called with mismatched scanId pWextState->scanId = %d "
"scanId = %d ", __func__, (int) pwextBuf->scanId,
(int) scanId);
}
/* Scan is no longer pending */
pwextBuf->mScanPending = VOS_FALSE;
// notify any applications that may be interested
memset(&wrqu, '\0', sizeof(wrqu));
we_event = SIOCGIWSCAN;
msg = NULL;
wireless_send_event(dev, we_event, &wrqu, msg);
vos_status = vos_event_set(&pwextBuf->vosevent);
if (!VOS_IS_STATUS_SUCCESS(vos_status))
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR, ("ERROR: HDD vos_event_set failed!!"));
return VOS_STATUS_E_FAILURE;
}
EXIT();
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: exit !!!",__func__);
return eHAL_STATUS_SUCCESS;
}
#endif
int iw_set_cscan(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev) ;
hdd_wext_state_t *pwextBuf = WLAN_HDD_GET_WEXT_STATE_PTR(pAdapter);
tCsrScanRequest scanRequest;
v_U32_t scanId = 0;
eHalStatus status = eHAL_STATUS_SUCCESS;
v_U8_t channelIdx;
ENTER();
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: enter !!!",__func__);
if ((WLAN_HDD_GET_CTX(pAdapter))->isLogpInProgress)
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s:LOGP in Progress. Ignore!!!",__func__);
return eHAL_STATUS_SUCCESS;
}
vos_mem_zero( &scanRequest, sizeof(scanRequest));
if (NULL != wrqu->data.pointer)
{
char *str_ptr = NULL;
tCsrSSIDInfo *SsidInfo = NULL;
int num_ssid = 0;
int i, j, ssid_start;
hdd_scan_pending_option_e scanPendingOption = WEXT_SCAN_PENDING_GIVEUP;
str_ptr = extra;
i = WEXT_CSCAN_HEADER_SIZE;
if( WEXT_CSCAN_PENDING_SECTION == str_ptr[i] )
{
scanPendingOption = (hdd_scan_pending_option_e)str_ptr[++i];
++i;
}
pAdapter->scan_info.scan_pending_option = scanPendingOption;
if(pAdapter->scan_info.mScanPending == TRUE)
{
hddLog(LOG1,"%s: mScanPending is TRUE",__func__);
/* If any scan is pending, just giveup this scan request */
if(WEXT_SCAN_PENDING_GIVEUP == scanPendingOption)
{
pAdapter->scan_info.waitScanResult = FALSE;
return eHAL_STATUS_SUCCESS;
}
/* If any scan pending, wait till finish current scan,
and try this scan request when previous scan finish */
else if(WEXT_SCAN_PENDING_DELAY == scanPendingOption)
{
pAdapter->scan_info.waitScanResult = TRUE;
vos_event_reset(&pAdapter->scan_info.scan_finished_event);
if(vos_wait_single_event(&pAdapter->scan_info.scan_finished_event,
WEXT_CSCAN_SCAN_DONE_WAIT_TIME))
{
hddLog(LOG1,"%s: Previous SCAN does not finished on time",__func__);
return eHAL_STATUS_SUCCESS;
}
}
/* Piggyback previous scan result */
else if(WEXT_SCAN_PENDING_PIGGYBACK == scanPendingOption)
{
pAdapter->scan_info.waitScanResult = TRUE;
return eHAL_STATUS_SUCCESS;
}
}
pAdapter->scan_info.waitScanResult = FALSE;
/* Check for scan IE */
while( WEXT_CSCAN_SSID_SECTION == str_ptr[i] )
{
/* ssid_len */
if(str_ptr[++i] != WEXT_CSCAN_CHANNEL_SECTION)
{
/* total number of ssid's */
num_ssid++;
/* increment length filed */
i += str_ptr[i] + 1;
}
/* i should be saved and it will be pointing to 'C' */
}
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: numSsid %d !!!",__func__, num_ssid);
if( num_ssid )
{
/* To be fixed in SME and PE: override the number of ssid with 1,
* as SME and PE does not handle multiple SSID in scan request
* */
scanRequest.SSIDs.numOfSSIDs = num_ssid;
/* Allocate num_ssid tCsrSSIDInfo structure */
SsidInfo = scanRequest.SSIDs.SSIDList =( tCsrSSIDInfo *)vos_mem_malloc(num_ssid*sizeof(tCsrSSIDInfo));
if(NULL == scanRequest.SSIDs.SSIDList) {
hddLog(VOS_TRACE_LEVEL_ERROR, "memory alloc failed SSIDInfo buffer");
return -ENOMEM;
}
/* copy all the ssid's and their length */
ssid_start = WEXT_CSCAN_HEADER_SIZE + 1;/* skipping 'S' */
for(j = 0; j < num_ssid; j++) {
if( SIR_MAC_MAX_SSID_LENGTH < str_ptr[ssid_start]){
scanRequest.SSIDs.numOfSSIDs -= 1;
} else{
/* get the ssid length */
SsidInfo->SSID.length = str_ptr[ssid_start++];
vos_mem_copy(SsidInfo->SSID.ssId, &str_ptr[ssid_start], SsidInfo->SSID.length);
hddLog(VOS_TRACE_LEVEL_INFO_HIGH, "SSID number %d: %s", j, SsidInfo->SSID.ssId);
}
/* skipping length */
ssid_start += str_ptr[ssid_start - 1] + 1;
/* Store next ssid info */
SsidInfo++;
}
}
/* Check for Channel IE */
if ( WEXT_CSCAN_CHANNEL_SECTION == str_ptr[i])
{
if( str_ptr[++i] == 0 )
{
scanRequest.ChannelInfo.numOfChannels = 0;
scanRequest.ChannelInfo.ChannelList = NULL;
i++;
}
else {
/* increment the counter */
scanRequest.ChannelInfo.numOfChannels = str_ptr[i++];
/* store temp channel list */
/* SME expects 1 byte channel content */
scanRequest.ChannelInfo.ChannelList = vos_mem_malloc(scanRequest.ChannelInfo.numOfChannels * sizeof(v_U8_t));
if(NULL == scanRequest.ChannelInfo.ChannelList)
{
hddLog(LOGE, "memory alloc failed for channel list creation");
status = -ENOMEM;
goto exit_point;
}
for(channelIdx = 0; channelIdx < scanRequest.ChannelInfo.numOfChannels; channelIdx++)
{
/* SCAN request from upper layer has 2 bytes channel */
scanRequest.ChannelInfo.ChannelList[channelIdx] = (v_U8_t)str_ptr[i];
i += sizeof(v_U16_t);
}
}
}
/* Set default */
scanRequest.scanType = eSIR_ACTIVE_SCAN;
scanRequest.minChnTime = 0;
scanRequest.maxChnTime = 0;
/* Now i is pointing to passive dwell dwell time */
/* 'P',min dwell time, max dwell time */
/* next two offsets contain min and max channel time */
if( WEXT_CSCAN_PASV_DWELL_SECTION == (str_ptr[i]) )
{
/* No SSID specified, num_ssid == 0, then start passive scan */
if (!num_ssid || (eSIR_PASSIVE_SCAN == pAdapter->scan_info.scan_mode))
{
scanRequest.scanType = eSIR_PASSIVE_SCAN;
scanRequest.minChnTime = (v_U8_t)str_ptr[++i];//scanReq->min_channel_time;
scanRequest.maxChnTime = (v_U8_t)str_ptr[++i];//scanReq->max_channel_time;
i++;
}
else
{
i += 3;
}
}
/* H indicates active channel time */
if( WEXT_CSCAN_HOME_DWELL_SECTION == (str_ptr[i]) )
{
if (num_ssid || (eSIR_ACTIVE_SCAN == pAdapter->scan_info.scan_mode))
{
scanRequest.scanType = eSIR_ACTIVE_SCAN;
scanRequest.minChnTime = str_ptr[++i];//scanReq->min_channel_time;
scanRequest.maxChnTime = str_ptr[++i];//scanReq->max_channel_time;
i++;
}
else
{
i +=3;
}
}
scanRequest.BSSType = eCSR_BSS_TYPE_ANY;
/* set requestType to full scan */
scanRequest.requestType = eCSR_SCAN_REQUEST_FULL_SCAN;
pAdapter->scan_info.mScanPending = TRUE;
/* if previous genIE is not NULL, update ScanIE */
if(0 != pwextBuf->genIE.length)
{
memset( &pAdapter->scan_info.scanAddIE, 0, sizeof(pAdapter->scan_info.scanAddIE) );
memcpy( pAdapter->scan_info.scanAddIE.addIEdata, pwextBuf->genIE.addIEdata,
pwextBuf->genIE.length );
pAdapter->scan_info.scanAddIE.length = pwextBuf->genIE.length;
pwextBuf->roamProfile.pAddIEScan = pAdapter->scan_info.scanAddIE.addIEdata;
pwextBuf->roamProfile.nAddIEScanLength = pAdapter->scan_info.scanAddIE.length;
/* clear previous genIE after use it */
memset( &pwextBuf->genIE, 0, sizeof(pwextBuf->genIE) );
}
/* push addIEScan in scanRequset if exist */
if (pAdapter->scan_info.scanAddIE.length &&
(pAdapter->scan_info.scanAddIE.length <=
sizeof(pAdapter->scan_info.scanAddIE.addIEdata)))
{
scanRequest.uIEFieldLen = pAdapter->scan_info.scanAddIE.length;
scanRequest.pIEField = pAdapter->scan_info.scanAddIE.addIEdata;
}
status = sme_ScanRequest((WLAN_HDD_GET_CTX(pAdapter))->hHal,
pAdapter->sessionId, &scanRequest, &scanId,
&hdd_ScanRequestCallback, dev);
if( !HAL_STATUS_SUCCESS(status) )
{
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL, "%s: SME scan fail status %d !!!",__func__, status);
pAdapter->scan_info.mScanPending = FALSE;
status = -EINVAL;
goto exit_point;
}
pAdapter->scan_info.scanId = scanId;
} //end of data->pointer
else {
status = -1;
}
exit_point:
/* free ssidlist */
if (scanRequest.SSIDs.SSIDList)
{
vos_mem_free(scanRequest.SSIDs.SSIDList);
}
/* free the channel list */
if(scanRequest.ChannelInfo.ChannelList)
{
vos_mem_free((void*)scanRequest.ChannelInfo.ChannelList);
}
EXIT();
VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO, "%s: exit !!!",__func__);
return status;
}
/* Abort any MAC scan if in progress */
void hdd_abort_mac_scan(hdd_context_t* pHddCtx, tANI_U8 sessionId,
eCsrAbortReason reason)
{
sme_AbortMacScan(pHddCtx->hHal, sessionId, reason);
}