| /* |
| * siteHash.c |
| * |
| * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name Texas Instruments nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** \file siteHash.c |
| * \brief Site Hash implementation |
| * |
| * \see siteHash.h |
| */ |
| |
| /****************************************************************************/ |
| /* */ |
| /* MODULE: siteHash.c */ |
| /* PURPOSE: Site Hash implementation */ |
| /* */ |
| /***************************************************************************/ |
| |
| #define __FILE_ID__ FILE_ID_84 |
| #include "tidef.h" |
| #include "report.h" |
| #include "osApi.h" |
| #include "siteMgrApi.h" |
| #include "siteHash.h" |
| #include "smeApi.h" |
| |
| |
| /**************************************************************************************************************** |
| |
| This file implements the site hash mechanism. This mechanism is used for faster access to the sites information. |
| It is compound of the following: |
| 1. hash function - which maps the 4 last bits of the BSSID to an entry in the hash table. |
| 2. hash table - each entry in the table points to a linked list of site entries |
| 3. site table - each entry holds a site information |
| |
| In order to find a site in the site table, we operate the hash function on the site's BSSID. |
| We receive a hash entry. We go over the linked list pointed by this hash entry until we find the site entry. |
| *****************************************************************************************************************/ |
| |
| #define WLAN_NUM_OF_MISSED_SACNS_BEFORE_AGING 2 |
| |
| |
| /********************************************/ |
| /* Functions Implementations */ |
| /********************************************/ |
| /************************************************************************ |
| * siteMgr_resetSiteTable * |
| ************************************************************************ |
| DESCRIPTION: reset the following things: |
| - Mgmt parameters structure |
| - Site table |
| - Hash table |
| - Primary site pointer |
| - Number of sites |
| |
| INPUT: hSiteMgr - Handle to site mgr |
| |
| |
| OUTPUT: |
| |
| RETURN: TI_OK |
| |
| ************************************************************************/ |
| TI_STATUS siteMgr_resetSiteTable(TI_HANDLE hSiteMgr, siteTablesParams_t *pSiteTableParams) |
| { |
| int i; |
| siteMgr_t *pSiteMgr = (siteMgr_t *)hSiteMgr; |
| |
| os_memoryZero(pSiteMgr->hOs, &pSiteTableParams->siteTable[0], sizeof(siteEntry_t)*pSiteTableParams->maxNumOfSites); |
| |
| for (i = 0; i < pSiteTableParams->maxNumOfSites; i++) |
| { |
| pSiteTableParams->siteTable[i].index = i; |
| pSiteTableParams->siteTable[i].siteType = SITE_NULL; |
| pSiteTableParams->siteTable[i].beaconRecv = TI_FALSE; |
| pSiteTableParams->siteTable[i].dtimPeriod = 1; |
| } |
| |
| pSiteTableParams->numOfSites = 0; |
| |
| pSiteMgr->pSitesMgmtParams->pPrimarySite = NULL; |
| |
| return TI_OK; |
| } |
| |
| /************************************************************************ |
| * findSiteEntry * |
| ************************************************************************ |
| DESCRIPTION: Perform the following things: |
| - Compute the site's hash entry based on the site BSSID and hash function |
| - Look fotr the site entry in the linked list pointed by the hash entry |
| - If the site is found in the site table, returns a pointer to the site entry |
| - If the site is not found, return NULL. |
| |
| INPUT: pSiteMgr - Handle to site mgr |
| mac - The site BSSID |
| |
| |
| OUTPUT: |
| |
| RETURN: Pointer to the site entry if site found, NULL otherwise |
| |
| ************************************************************************/ |
| siteEntry_t *findSiteEntry(siteMgr_t *pSiteMgr, |
| TMacAddr *mac) |
| { |
| siteTablesParams_t *pCurrentSiteTable = pSiteMgr->pSitesMgmtParams->pCurrentSiteTable; |
| siteEntry_t *pSiteEntry; |
| TI_UINT8 tableIndex=2, i; |
| |
| |
| do |
| { |
| tableIndex--; |
| for (i = 0; i < pCurrentSiteTable->maxNumOfSites; i++) |
| { |
| pSiteEntry = &(pCurrentSiteTable->siteTable[i]); |
| |
| if (MAC_EQUAL (pSiteEntry->bssid, *mac)) |
| { |
| TRACE6(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "FIND success, bssid: %X-%X-%X-%X-%X-%X\n\n", (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]); |
| return pSiteEntry; |
| } |
| |
| } |
| if ((pSiteMgr->pDesiredParams->siteMgrDesiredDot11Mode == DOT11_DUAL_MODE) && (tableIndex==1)) |
| { /* change site table */ |
| if (pCurrentSiteTable == &pSiteMgr->pSitesMgmtParams->dot11BG_sitesTables) |
| { |
| pCurrentSiteTable = (siteTablesParams_t *)&pSiteMgr->pSitesMgmtParams->dot11A_sitesTables; |
| } |
| else |
| { |
| pCurrentSiteTable = &pSiteMgr->pSitesMgmtParams->dot11BG_sitesTables; |
| } |
| } |
| |
| } while (tableIndex>0); |
| |
| |
| |
| TRACE6(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "FIND failure, bssid: %X-%X-%X-%X-%X-%X\n\n", (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]); |
| |
| |
| return NULL; |
| } |
| |
| /************************************************************************ |
| * findAndInsertSiteEntry * |
| ************************************************************************ |
| DESCRIPTION: Perform the following things: |
| - Compute the site's hash entry based on the site BSSID and hash function |
| - Look for the site entry in the linked list pointed by the hash entry |
| - If the site is found in the site table, returns a pointer to the site entry |
| - If the site is not found in the site table, tries to add the site |
| - If succeeds, returns a pointer to the site entry |
| - Otherwise, returns NULL |
| |
| INPUT: pSiteMgr - Handle to site mgr |
| mac - The site BSSID |
| band - The site band |
| |
| |
| OUTPUT: |
| |
| RETURN: Pointer to the site entry if site found/inserted, NULL otherwise |
| |
| ************************************************************************/ |
| siteEntry_t *findAndInsertSiteEntry(siteMgr_t *pSiteMgr, |
| TMacAddr *mac, |
| ERadioBand band) |
| { |
| TI_UINT8 i, emptySiteIndex=0, nextSite2Remove=0; |
| siteEntry_t *pSiteEntry, *pPrimarySite=pSiteMgr->pSitesMgmtParams->pPrimarySite; |
| sitesMgmtParams_t *pSitesMgmtParams = pSiteMgr->pSitesMgmtParams; |
| siteTablesParams_t *pCurrentSiteTable; |
| TI_BOOL firstEmptySiteFound = TI_FALSE; |
| TI_UINT32 oldestTS; |
| |
| |
| /* choose site table according to AP's band */ |
| if ( RADIO_BAND_2_4_GHZ == band ) |
| { |
| pCurrentSiteTable = &(pSitesMgmtParams->dot11BG_sitesTables); |
| } |
| else if (RADIO_BAND_5_0_GHZ == band) |
| { |
| pCurrentSiteTable = (siteTablesParams_t*) &(pSitesMgmtParams->dot11A_sitesTables); |
| } |
| else |
| { |
| TRACE1(pSiteMgr->hReport, REPORT_SEVERITY_ERROR, "Bad band: %d\n\n", band); |
| pCurrentSiteTable = &(pSitesMgmtParams->dot11BG_sitesTables); |
| } |
| |
| /* Set the first TS to a site which is not the Primary site */ |
| if (pPrimarySite != &(pCurrentSiteTable->siteTable[0])) |
| { |
| oldestTS = pCurrentSiteTable->siteTable[0].localTimeStamp; |
| } |
| else |
| { |
| oldestTS = pCurrentSiteTable->siteTable[1].localTimeStamp; |
| } |
| |
| /* Loop all the sites till the desired MAC is found */ |
| for (i = 0; i < pCurrentSiteTable->maxNumOfSites; i++) |
| { |
| pSiteEntry = &(pCurrentSiteTable->siteTable[i]); |
| |
| if (MAC_EQUAL (pSiteEntry->bssid, *mac)) |
| { |
| |
| TRACE6(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "FIND success, bssid: %X-%X-%X-%X-%X-%X\n\n", (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]); |
| |
| return pSiteEntry; |
| } |
| else if (pSiteEntry->siteType == SITE_NULL) |
| { /* Save the first empty site, in case the |
| desired MAC is not found */ |
| if (!firstEmptySiteFound) |
| { |
| emptySiteIndex = i; |
| firstEmptySiteFound=TI_TRUE; |
| } |
| |
| } |
| if ((oldestTS > pSiteEntry->localTimeStamp) && |
| (pSiteEntry != pPrimarySite)) |
| { /* Save the oldest site's index, according to TS */ |
| oldestTS = pSiteEntry->localTimeStamp; |
| nextSite2Remove = i; |
| } |
| } |
| |
| |
| if ((!firstEmptySiteFound) || (pCurrentSiteTable->numOfSites>=pCurrentSiteTable->maxNumOfSites)) |
| { |
| /* No NULL entry has been found. Remove the oldest site */ |
| pSiteEntry = &(pCurrentSiteTable->siteTable[nextSite2Remove]); |
| TRACE9(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "INSERT failure, no free entry!, numOfSites=%d, removing site index=%d,\n bssid: %X-%X-%X-%X-%X-%X, ts=%d \n", pCurrentSiteTable->numOfSites, nextSite2Remove, pSiteEntry->bssid[0], pSiteEntry->bssid[1], pSiteEntry->bssid[2], pSiteEntry->bssid[3], pSiteEntry->bssid[4], pSiteEntry->bssid[5], pSiteEntry->localTimeStamp); |
| removeSiteEntry(pSiteMgr, pCurrentSiteTable, pSiteEntry); |
| emptySiteIndex = nextSite2Remove; |
| |
| } |
| |
| |
| pCurrentSiteTable->numOfSites++; |
| |
| pSiteEntry = &(pCurrentSiteTable->siteTable[emptySiteIndex]); |
| |
| /* fill the entry with the station mac */ |
| MAC_COPY (pSiteEntry->bssid, *mac); |
| |
| /* Some parameters have to be initialized immediately after entry allocation */ |
| |
| if(pSiteMgr->siteMgrOperationalMode == DOT11_G_MODE) |
| pSiteEntry->currentSlotTime = pSiteMgr->pDesiredParams->siteMgrDesiredSlotTime; |
| |
| TRACE8(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "INSERT success, bssid: %X-%X-%X-%X-%X-%X, band=%d, index=%d\n\n", (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5], band, emptySiteIndex); |
| |
| |
| return pSiteEntry; |
| } |
| |
| /************************************************************************ |
| * removeSiteEntry * |
| ************************************************************************ |
| DESCRIPTION: Removes the site entry from the site table |
| |
| INPUT: pSiteMgr - Handle to site mgr |
| pCurrSiteTblParams - Pointer to current site table parameters |
| hashPtr - Pointer to the site entry |
| |
| |
| OUTPUT: |
| |
| RETURN: |
| |
| ************************************************************************/ |
| void removeSiteEntry(siteMgr_t *pSiteMgr, |
| siteTablesParams_t *pCurrSiteTblParams, |
| siteEntry_t *pSiteEntry) |
| { |
| TI_UINT8 index; |
| |
| if (pSiteEntry == NULL) |
| { |
| TRACE0(pSiteMgr->hReport, REPORT_SEVERITY_ERROR, "REMOVAL failure, site is NULL\n\n"); |
| return; |
| } |
| |
| if (pCurrSiteTblParams->numOfSites == 0) |
| { |
| TRACE0(pSiteMgr->hReport, REPORT_SEVERITY_ERROR, "REMOVAL failure, site table is empty\n\n"); |
| return; |
| } |
| |
| TRACE6(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "removeSiteEntry REMOVE ssid=, bssid= 0x%x-0x%x-0x%x-0x%x-0x%x-0x%x\n\n", pSiteEntry->bssid[0], pSiteEntry->bssid[1], pSiteEntry->bssid[2], pSiteEntry->bssid[3], pSiteEntry->bssid[4], pSiteEntry->bssid[5] ); |
| |
| pCurrSiteTblParams->numOfSites--; |
| |
| /* Now remove (exclude) hashPtr entry from the linked list */ |
| |
| TRACE6(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, "REMOVAL success, bssid: %X-%X-%X-%X-%X-%X\n\n", pSiteEntry->bssid[0], pSiteEntry->bssid[1], pSiteEntry->bssid[2], pSiteEntry->bssid[3], pSiteEntry->bssid[4], pSiteEntry->bssid[5]); |
| TRACE1(pSiteMgr->hReport, REPORT_SEVERITY_INFORMATION, " SITE TABLE remaining entries number %d \n", pCurrSiteTblParams->numOfSites); |
| |
| /* Clean the rest of the entry structure */ |
| index = pSiteEntry->index; /* keep the index of the siteTable entry */ |
| os_memoryZero(pSiteMgr->hOs, pSiteEntry, sizeof(siteEntry_t)); |
| |
| /* This is not required!!!! - Remove!!*/ |
| pSiteEntry->dtimPeriod = 1; |
| pSiteEntry->siteType = SITE_NULL; |
| pSiteEntry->index = index; /* restore the index of the siteTable */ |
| |
| /* if removing previous primary site - update the link */ |
| if (pSiteEntry == pSiteMgr->pSitesMgmtParams->pPrevPrimarySite) |
| { |
| pSiteMgr->pSitesMgmtParams->pPrevPrimarySite = NULL; |
| } |
| |
| return; |
| } |
| |
