/**
* \fn sme_Select
* \brief Select a connection candidate from the scan result table
*
* Select a connection candidate from the scan result table.
*
* Connection candidate must match SSID, BSSID, BSS type, RSN and WSC settings, has the best
* RSSI level from all matching sites, and connection was not attempted to it in this SME cycle
* (since last scan was completed)
*
* \param hSme - handle to the SME object
* \return A pointer to the selected site, NULL if no site macthes the selection criteria
*/
TSiteEntry *sme_Select (TI_HANDLE hSme)
{
TSme *pSme = (TSme*)hSme;
TSiteEntry *pCurrentSite, *pSelectedSite = NULL;
TI_INT8 iSelectedSiteRssi = -127; /* minimum RSSI */
TI_BOOL bWscPbAbort, pWscPbApFound = TI_FALSE;
int apFoundCtr =0;
/* on SG avalanche, select is not needed, send connect event automatically */
if (TI_TRUE == pSme->bReselect)
{
paramInfo_t *pParam;
pParam = (paramInfo_t *)os_memoryAlloc(pSme->hOS, sizeof(paramInfo_t));
if (!pParam)
{
return NULL;
}
pSme->bReselect = TI_FALSE;
/* Get Primary Site */
pParam->paramType = SITE_MGR_GET_PRIMARY_SITE;
siteMgr_getParam(pSme->hSiteMgr, pParam);
pCurrentSite = pParam->content.pPrimarySite;
os_memoryFree(pSme->hOS, pParam, sizeof(paramInfo_t));
return pCurrentSite;
}
/* get the first site from the scan result table */
pCurrentSite = scanResultTable_GetFirst (pSme->hScanResultTable);
/* check all sites */
while (NULL != pCurrentSite)
{
/* if this site was previously selected in the current SME connection attempt, and conn mode is auto */
if ((TI_TRUE == pCurrentSite->bConsideredForSelect) && (CONNECT_MODE_AUTO == pSme->eConnectMode))
{
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* check if site matches */
/* first check SSID match */
if (TI_FALSE == sme_SelectSsidMatch (hSme, &(pCurrentSite->ssid), &(pSme->tSsid), pSme->eSsidType))
/* site doesn't match */
{
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* Now check BSSID match */
if (TI_FALSE == sme_SelectBssidMatch (&(pCurrentSite->bssid), &(pSme->tBssid)))
/* site doesn't match */
{
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* and BSS type match */
if (TI_FALSE == sme_SelectBssTypeMatch (pCurrentSite->bssType, pSme->eBssType))
/* site doesn't match */
{
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
if (pCurrentSite->WSCSiteMode == TIWLN_SIMPLE_CONFIG_PBC_METHOD)
{
apFoundCtr++;
}
if (apFoundCtr > 1)
{
pWscPbApFound = TI_TRUE;
}
/* and simple config match */
if (TI_FALSE == sme_SelectWscMatch (hSme, pCurrentSite, &bWscPbAbort, &pWscPbApFound))
/* site doesn't match */
{
/* also check if abort was indicated */
if (TI_TRUE == bWscPbAbort)
{
/* send event to user mode to indicate this */
EvHandlerSendEvent (pSme->hEvHandler, IPC_EVENT_WPS_SESSION_OVERLAP, NULL, 0);
/* select failed - will rescan in time */
return NULL;
}
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* and security match */
if (pCurrentSite->WSCSiteMode == TIWLN_SIMPLE_CONFIG_OFF) /* we don't need to check RSN match while WSC is active */
{
if (TI_FALSE == sme_SelectRsnMatch (hSme, pCurrentSite))
/* site doesn't match */
{
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
}
/* and rate match */
if (TI_FALSE == siteMgr_SelectRateMatch (pSme->hSiteMgr, pCurrentSite))
/* site doesn't match */
{
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* if this site RSSI is higher than current maximum, select it */
if (pCurrentSite->rssi > iSelectedSiteRssi)
{
pSelectedSite = pCurrentSite;
iSelectedSiteRssi = pCurrentSite->rssi;
}
/* and continue to the next site */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
}
/* if a matching site was found */
if (NULL != pSelectedSite)
{
/* mark that a connection to this site was (actually is) attempted */
pSelectedSite->bConsideredForSelect = TI_TRUE;
/* hope this is the correct place for siteMgr_changeBandParams */
siteMgr_changeBandParams (pSme->hSiteMgr, pSelectedSite->eBand);
/*
* Coordinate between SME module site table and Site module site Table
* copy candidate AP to Site module site Table.
*/
siteMgr_CopyToPrimarySite(pSme->hSiteMgr, pSelectedSite);
}
/* return the selected site (or NULL, if no site was selected) */
return pSelectedSite;
}
/**
* \fn sme_Select
* \brief Select a connection candidate from the scan result table
*
* Select a connection candidate from the scan result table.
*
* Connection candidate must match SSID, BSSID, BSS type, RSN and WSC settings, has the best
* RSSI level from all matching sites, and connection was not attempted to it in this SME cycle
* (since last scan was completed)
*
* \param hSme - handle to the SME object
* \return A pointer to the selected site, NULL if no site macthes the selection criteria
*/
TSiteEntry *sme_Select (TI_HANDLE hSme)
{
TSme *pSme = (TSme*)hSme;
TSiteEntry *pCurrentSite, *pSelectedSite = NULL;
TI_INT8 iSelectedSiteRssi = -127; /* minimum RSSI */
TI_BOOL bWscPbAbort, pWscPbApFound = TI_FALSE;
int apFoundCtr =0;
TIWLN_SIMPLE_CONFIG_MODE eWscMode;
TRACE0(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select called\n");
/* on SG avalanche, select is not needed, send connect event automatically */
if (TI_TRUE == pSme->bReselect)
{
paramInfo_t *pParam;
TRACE0(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: reselect flag is on, reselecting the current site\n");
pParam = (paramInfo_t *)os_memoryAlloc(pSme->hOS, sizeof(paramInfo_t));
if (!pParam)
{
return NULL;
}
pSme->bReselect = TI_FALSE;
/* Get Primary Site */
pParam->paramType = SITE_MGR_GET_PRIMARY_SITE;
siteMgr_getParam(pSme->hSiteMgr, pParam);
pCurrentSite = pParam->content.pPrimarySite;
os_memoryFree(pSme->hOS, pParam, sizeof(paramInfo_t));
return pCurrentSite;
}
/* get the first site from the scan result table */
pCurrentSite = scanResultTable_GetFirst (pSme->hScanResultTable);
/* check all sites */
while (NULL != pCurrentSite)
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: considering BSSID: %02x:%02x:%02x:%02x:%02x:%02x for selection\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
/* if this site was previously selected in the current SME connection attempt, and conn mode is auto */
if (TI_TRUE == pCurrentSite->bConsideredForSelect)
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x was selected previously\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* check if site matches */
/* first check SSID match */
if (TI_FALSE == sme_SelectSsidMatch (hSme, &(pCurrentSite->ssid), &(pSme->tSsid), pSme->eSsidType))
/* site doesn't match */
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match SSID\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* Now check BSSID match */
if (TI_FALSE == sme_SelectBssidMatch (&(pCurrentSite->bssid), &(pSme->tBssid)))
/* site doesn't match */
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match SSID\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* and BSS type match */
if (TI_FALSE == sme_SelectBssTypeMatch (pCurrentSite->bssType, pSme->eBssType))
/* site doesn't match */
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match BSS type\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
if (pCurrentSite->WSCSiteMode == TIWLN_SIMPLE_CONFIG_PBC_METHOD)
{
apFoundCtr++;
}
if (apFoundCtr > 1)
{
pWscPbApFound = TI_TRUE;
}
/* and simple config match */
if (TI_FALSE == sme_SelectWscMatch (hSme, pCurrentSite, &bWscPbAbort, &pWscPbApFound))
/* site doesn't match */
{
/* also check if abort was indicated */
if (TI_TRUE == bWscPbAbort)
{
/* send event to user mode to indicate this */
EvHandlerSendEvent (pSme->hEvHandler, IPC_EVENT_WPS_SESSION_OVERLAP, NULL, 0);
/* select failed - will rescan in time */
return NULL;
}
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match WSC\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* and security match */
siteMgr_getParamWSC(pSme->hSiteMgr, &eWscMode);
/* we don't need to check RSN match while WSC is active */
if ((pCurrentSite->WSCSiteMode == TIWLN_SIMPLE_CONFIG_OFF) || (pCurrentSite->WSCSiteMode != eWscMode))
{
if (TI_FALSE == sme_SelectRsnMatch (hSme, pCurrentSite))
/* site doesn't match */
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match RSN\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
}
/* and rate match */
if (TI_FALSE == siteMgr_SelectRateMatch (pSme->hSiteMgr, pCurrentSite))
/* site doesn't match */
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x doesn't match rates\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
if (TI_TRUE == pCurrentSite->bChannelSwitchAnnoncIEFound)
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x has channel switch IE so ignore it \n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pCurrentSite->bConsideredForSelect = TI_TRUE; /* don't try this site again */
/* get the next site and continue the loop */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
continue;
}
/* if this site RSSI is higher than current maximum, select it */
if (pCurrentSite->rssi > iSelectedSiteRssi)
{
TRACE6(pSme->hReport, REPORT_SEVERITY_INFORMATION , "sme_Select: BSSID: %02x:%02x:%02x:%02x:%02x:%02x match and has highest RSSI so far!\n", pCurrentSite->bssid[ 0 ], pCurrentSite->bssid[ 1 ], pCurrentSite->bssid[ 2 ], pCurrentSite->bssid[ 3 ], pCurrentSite->bssid[ 4 ], pCurrentSite->bssid[ 5 ]);
pSelectedSite = pCurrentSite;
iSelectedSiteRssi = pCurrentSite->rssi;
}
/* and continue to the next site */
pCurrentSite = scanResultTable_GetNext (pSme->hScanResultTable);
}
/* if a matching site was found */
if (NULL != pSelectedSite)
{
/* mark that a connection to this site was (actually is) attempted */
pSelectedSite->bConsideredForSelect = TI_TRUE;
/* hope this is the correct place for siteMgr_changeBandParams */
siteMgr_changeBandParams (pSme->hSiteMgr, pSelectedSite->eBand);
/*
* Coordinate between SME module site table and Site module site Table
* copy candidate AP to Site module site Table.
*/
siteMgr_CopyToPrimarySite(pSme->hSiteMgr, pSelectedSite);
/* copy the result, rather than returning a pointer to the entry in the scan result table.
* This is done since the table might change durring the connection process, and the pointer
* will point to the wrong entry in the table, causing connection/disconnection problems */
os_memoryCopy(pSme->hOS, &(pSme->tCandidate), pSelectedSite, sizeof(TSiteEntry));
return &(pSme->tCandidate);
}
/* return NULL if no site was selected */
return NULL;
}