netwerk/wifi/nsWifiMonitorGonk.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsCOMPtr.h"
   6 #include "nsComponentManagerUtils.h"
   7 #include "nsServiceManagerUtils.h"
   8 #include "nsThreadUtils.h"
   9 #include "nsXPCOM.h"
  10 #include "nsXPCOMCID.h"
  11 #include "nsIObserver.h"
  12 #include "nsIObserverService.h"
  13 #include "nsWifiMonitor.h"
  14 #include "nsWifiAccessPoint.h"
  15
  16 #include "nsServiceManagerUtils.h"
  17 #include "nsComponentManagerUtils.h"
  18 #include "mozilla/Services.h"
  19
  20 #include "nsIInterfaceRequestor.h"
  21 #include "nsIInterfaceRequestorUtils.h"
  22
  23 using namespace mozilla;
  24
  25 #if defined(PR_LOGGING)
  26 PRLogModuleInfo *gWifiMonitorLog;
  27 #endif
  28
  29 NS_IMPL_ISUPPORTS(nsWifiMonitor,
  30                   nsIWifiMonitor,
  31                   nsIObserver,
  32                   nsIWifiScanResultsReady)
  33
  34 nsWifiMonitor::nsWifiMonitor()
  35 {
  36 #if defined(PR_LOGGING)
  37   gWifiMonitorLog = PR_NewLogModule("WifiMonitor");
  38 #endif
  39
  40   nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
  41   if (obsSvc) {
  42     obsSvc->AddObserver(this, "xpcom-shutdown", false);
  43   }
  44   LOG(("@@@@@ wifimonitor created\n"));
  45 }
  46
  47 nsWifiMonitor::~nsWifiMonitor()
  48 {
  49 }
  50
  51 NS_IMETHODIMP
  52 nsWifiMonitor::StartWatching(nsIWifiListener *aListener)
  53 {
  54   LOG(("@@@@@ nsWifiMonitor::StartWatching\n"));
  55   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
  56   if (!aListener) {
  57     return NS_ERROR_NULL_POINTER;
  58   }
  59
  60   mListeners.AppendElement(nsWifiListener(new nsMainThreadPtrHolder<nsIWifiListener>(aListener)));
  61
  62   if (!mTimer) {
  63     mTimer = do_CreateInstance("@mozilla.org/timer;1");
  64     mTimer->Init(this, 5000, nsITimer::TYPE_REPEATING_SLACK);
  65   }
  66   StartScan();
  67   return NS_OK;
  68 }
  69
  70 NS_IMETHODIMP
  71 nsWifiMonitor::StopWatching(nsIWifiListener *aListener)
  72 {
  73   LOG(("@@@@@ nsWifiMonitor::StopWatching\n"));
  74   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
  75   if (!aListener) {
  76     return NS_ERROR_NULL_POINTER;
  77   }
  78
  79   for (uint32_t i = 0; i < mListeners.Length(); i++) {
  80     if (mListeners[i].mListener == aListener) {
  81       mListeners.RemoveElementAt(i);
  82       break;
  83     }
  84   }
  85
  86   if (mListeners.Length() == 0) {
  87     ClearTimer();
  88   }
  89   return NS_OK;
  90 }
  91
  92 void
  93 nsWifiMonitor::StartScan()
  94 {
  95   nsCOMPtr<nsIInterfaceRequestor> ir = do_GetService("@mozilla.org/telephony/system-worker-manager;1");
  96   nsCOMPtr<nsIWifi> wifi = do_GetInterface(ir);
  97   if (!wifi) {
  98     return;
  99   }
 100   wifi->GetWifiScanResults(this);
 101 }
 102
 103 NS_IMETHODIMP
 104 nsWifiMonitor::Observe(nsISupports *subject, const char *topic,
 105                        const char16_t *data)
 106 {
 107   if (!strcmp(topic, "timer-callback")) {
 108     LOG(("timer callback\n"));
 109     StartScan();
 110     return NS_OK;
 111   }
 112
 113   if (!strcmp(topic, "xpcom-shutdown")) {
 114     LOG(("Shutting down\n"));
 115     ClearTimer();
 116     return NS_OK;
 117   }
 118
 119   return NS_ERROR_UNEXPECTED;
 120 }
 121
 122 NS_IMETHODIMP
 123 nsWifiMonitor::Onready(uint32_t count, nsIWifiScanResult **results)
 124 {
 125   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
 126   LOG(("@@@@@ About to send data to the wifi listeners\n"));
 127
 128   nsCOMArray<nsWifiAccessPoint> accessPoints;
 129
 130   for (uint32_t i = 0; i < count; i++) {
 131     nsRefPtr<nsWifiAccessPoint> ap = new nsWifiAccessPoint();
 132
 133     nsString temp;
 134     results[i]->GetBssid(temp);
 135     //   00:00:00:00:00:00 --> 00-00-00-00-00-00
 136     for (int32_t x=0; x<6; x++) {
 137       temp.ReplaceSubstring(NS_LITERAL_STRING(":"), NS_LITERAL_STRING("-")); // would it be too much to ask for a ReplaceAll()?
 138     }
 139
 140     nsCString mac;
 141     mac.AssignWithConversion(temp);
 142
 143     results[i]->GetSsid(temp);
 144
 145     nsCString ssid;
 146     ssid.AssignWithConversion(temp);
 147
 148     uint32_t signal;
 149     results[i]->GetSignalStrength(&signal);
 150
 151     ap->setSignal(signal);
 152     ap->setMacRaw(mac.get());
 153     ap->setSSIDRaw(ssid.get(), ssid.Length());
 154
 155     accessPoints.AppendObject(ap);
 156   }
 157
 158   bool accessPointsChanged = !AccessPointsEqual(accessPoints, mLastAccessPoints);
 159   ReplaceArray(mLastAccessPoints, accessPoints);
 160
 161   nsTArray<nsIWifiAccessPoint*> ac;
 162   uint32_t resultCount = mLastAccessPoints.Count();
 163   for (uint32_t i = 0; i < resultCount; i++) {
 164     ac.AppendElement(mLastAccessPoints[i]);
 165   }
 166
 167   for (uint32_t i = 0; i < mListeners.Length(); i++) {
 168     if (!mListeners[i].mHasSentData || accessPointsChanged) {
 169       mListeners[i].mHasSentData = true;
 170       mListeners[i].mListener->OnChange(ac.Elements(), ac.Length());
 171     }
 172   }
 173   return NS_OK;
 174 }
 175
 176 NS_IMETHODIMP
 177 nsWifiMonitor::Onfailure()
 178 {
 179   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
 180   LOG(("@@@@@ About to send error to the wifi listeners\n"));
 181   for (uint32_t i = 0; i < mListeners.Length(); i++) {
 182     mListeners[i].mListener->OnError(NS_ERROR_UNEXPECTED);
 183   }
 184
 185   ClearTimer();
 186   return NS_OK;
 187 }