LCOV - code coverage report
Current view: directory - netwerk/wifi - nsWifiScannerUnix.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 71 35 49.3 %
Date: 2012-06-02 Functions: 4 4 100.0 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is Geolocation.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is Mozilla Foundation
      17                 :  * Portions created by the Initial Developer are Copyright (C) 2008
      18                 :  * the Initial Developer. All Rights Reserved.
      19                 :  *
      20                 :  * This is a derivative of work done by Google under a BSD style License.
      21                 :  * See: http://gears.googlecode.com/svn/trunk/gears/geolocation/
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *  Doug Turner <dougt@meer.net>  (Original Author)
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #include "iwlib.h"
      41                 : 
      42                 : #include "dlfcn.h"
      43                 : 
      44                 : #include "nsWifiMonitor.h"
      45                 : #include "nsWifiAccessPoint.h"
      46                 : 
      47                 : #include "nsServiceManagerUtils.h"
      48                 : #include "nsComponentManagerUtils.h"
      49                 : #include "nsIMutableArray.h"
      50                 : #include "nsThreadUtils.h"
      51                 : 
      52                 : using namespace mozilla;
      53                 : 
      54                 : 
      55                 : typedef int (*iw_open_t)(void);
      56                 : 
      57                 : typedef void (*iw_enum_t)(int   skfd,
      58                 :                           iw_enum_handler fn,
      59                 :                           char *args[],
      60                 :                           int count);
      61                 : 
      62                 : typedef  int (*iw_stats_t)(int skfd,
      63                 :                            const char *ifname,
      64                 :                            iwstats *stats,
      65                 :                            const iwrange *range,
      66                 :                            int has_range);
      67                 : 
      68               3 : static int scan_wifi(int skfd, char* ifname, char* args[], int count)
      69                 : {
      70               3 :   nsCOMArray<nsWifiAccessPoint>* accessPoints = (nsCOMArray<nsWifiAccessPoint>*) args[0];
      71               3 :   iw_stats_t iw_stats = (iw_stats_t) args[1];
      72                 : 
      73                 :   struct iwreq wrq;
      74                 : 
      75                 :   int result = iw_get_ext(skfd, ifname, SIOCGIWMODE, &wrq);
      76               3 :   if (result < 0)
      77               3 :     return 0;
      78                 : 
      79                 :   // We only cared about "Managed" mode.  2 is the magic number.  There isn't a #define for this.
      80               0 :   if (wrq.u.mode != 2)
      81               0 :     return 0;
      82                 : 
      83               0 :   nsWifiAccessPoint* ap = new nsWifiAccessPoint();
      84               0 :   if (!ap)
      85               0 :     return 0;
      86                 : 
      87                 :   char buffer[128];
      88               0 :   wrq.u.essid.pointer = buffer;
      89               0 :   wrq.u.essid.length  = 128;
      90               0 :   wrq.u.essid.flags   = 0;
      91                 :   result = iw_get_ext(skfd, ifname, SIOCGIWESSID, &wrq);
      92               0 :   if (result < 0) {
      93               0 :     delete ap;
      94               0 :     return 0;
      95                 :   }
      96                 : 
      97               0 :   ap->setSSID(buffer, wrq.u.essid.length);
      98                 : 
      99                 :   result = iw_get_ext(skfd, ifname, SIOCGIWAP, &wrq);
     100               0 :   if (result < 0) {
     101               0 :     delete ap;
     102               0 :     return 0;
     103                 :   }
     104               0 :   ap->setMac( (const uint8*) wrq.u.ap_addr.sa_data );
     105                 : 
     106                 :   iwrange range;
     107                 :   iwstats stats;
     108               0 :   result = (*iw_stats)(skfd, ifname, &stats, &range, 1);
     109               0 :   if (result < 0) {
     110               0 :     delete ap;
     111               0 :     return 0;
     112                 :   }
     113                 : 
     114               0 :   if(stats.qual.level > range.max_qual.level)
     115               0 :     ap->setSignal(stats.qual.level - 0x100);
     116                 :   else
     117               0 :     ap->setSignal(0);
     118                 : 
     119               0 :   accessPoints->AppendObject(ap);
     120               0 :   return 0;
     121                 : }
     122                 : 
     123                 : nsresult
     124               1 : nsWifiMonitor::DoScan()
     125                 : {
     126                 :   static void* iwlib_handle = NULL;
     127                 : 
     128               1 :   if (!iwlib_handle) {
     129               1 :     iwlib_handle = dlopen("libiw.so", RTLD_NOW);
     130               1 :     if (!iwlib_handle) {
     131               0 :       iwlib_handle = dlopen("libiw.so.29", RTLD_NOW);
     132               0 :       if (!iwlib_handle) {
     133               0 :         iwlib_handle = dlopen("libiw.so.30", RTLD_NOW);
     134               0 :         if (!iwlib_handle) {
     135               0 :           LOG(("Could not load libiw\n"));
     136               0 :           return NS_ERROR_NOT_AVAILABLE;
     137                 :         }
     138                 :       }
     139                 :     }
     140                 :   }
     141                 :   else {
     142               0 :     LOG(("Loaded libiw\n"));
     143                 :   }
     144                 : 
     145                 :   static iw_open_t iw_open = NULL;
     146               1 :   if (!iw_open)
     147               1 :     iw_open = (iw_open_t) dlsym(iwlib_handle, "iw_sockets_open");
     148                 : 
     149                 :   static iw_enum_t iw_enum = NULL;
     150               1 :   if (!iw_enum)
     151               1 :     iw_enum = (iw_enum_t) dlsym(iwlib_handle, "iw_enum_devices");
     152                 : 
     153                 :   static iw_stats_t iw_stats = NULL;
     154               1 :   if (!iw_stats)
     155               1 :     iw_stats = (iw_stats_t)dlsym(iwlib_handle, "iw_get_stats");
     156                 : 
     157               1 :   if (!iw_open || !iw_enum || !iw_stats) {
     158               0 :     LOG(("Could not load a symbol from iwlib.so\n"));
     159               0 :     return NS_ERROR_FAILURE;
     160                 :   }
     161                 : 
     162               1 :   int skfd = (*iw_open)();
     163                 : 
     164               1 :   if (skfd < 0) {
     165               0 :     LOG(("Could not iw_open\n"));
     166               0 :     return NS_ERROR_FAILURE;
     167                 :   }
     168                 : 
     169                 :   struct SocketsGuard {
     170                 :     int skfd;
     171               1 :     SocketsGuard(int skfd) : skfd(skfd) {}
     172               2 :     ~SocketsGuard() { iw_sockets_close(skfd); }
     173               2 :   } guard(skfd);
     174                 : 
     175               2 :   nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
     176               2 :   nsCOMArray<nsWifiAccessPoint> accessPoints;
     177                 : 
     178               1 :   char* args[] = {(char*) &accessPoints, (char*) iw_stats, nsnull };
     179                 : 
     180               3 :   while (mKeepGoing) {
     181               1 :     accessPoints.Clear();
     182                 : 
     183               1 :     (*iw_enum)(skfd, &scan_wifi, args, 1);
     184                 : 
     185               1 :     bool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
     186               1 :     ReplaceArray(lastAccessPoints, accessPoints);
     187                 : 
     188               1 :     nsresult rv = CallWifiListeners(lastAccessPoints, accessPointsChanged);
     189               1 :     NS_ENSURE_SUCCESS(rv, rv);
     190                 : 
     191               1 :     LOG(("waiting on monitor\n"));
     192                 : 
     193               2 :     ReentrantMonitorAutoEnter mon(mReentrantMonitor);
     194               1 :     mon.Wait(PR_SecondsToInterval(60));
     195                 :   }
     196                 : 
     197               1 :   return NS_OK;
     198                 : }

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