DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5b81998bb7ab)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include <mach-o/dyld.h>
#include <dlfcn.h>
#include <unistd.h>

#include "osx_wifi.h"

#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsWifiMonitor.h"
#include "nsWifiAccessPoint.h"

#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsIMutableArray.h"

using namespace mozilla;

// defined in osx_corewlan.mm
// basically relaces accesspoints in the passed reference
// it lives in a separate file so that we can use objective c.
extern nsresult GetAccessPointsFromWLAN(nsCOMArray<nsWifiAccessPoint> &accessPoints);

nsresult
nsWifiMonitor::DoScanWithCoreWLAN()
{
  // Regularly get the access point data.

  nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
  nsCOMArray<nsWifiAccessPoint> accessPoints;

  do {
    nsresult rv = GetAccessPointsFromWLAN(accessPoints);
    if (NS_FAILED(rv))
      return rv;

    bool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
    ReplaceArray(lastAccessPoints, accessPoints);

    rv = CallWifiListeners(lastAccessPoints, accessPointsChanged);
    NS_ENSURE_SUCCESS(rv, rv);

    // wait for some reasonable amount of time.  pref?
    LOG(("waiting on monitor\n"));

    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
    mon.Wait(PR_SecondsToInterval(60));
  }
  while (mKeepGoing);

  return NS_OK;
}

nsresult
nsWifiMonitor::DoScanOld()
{
  void *apple_80211_library = dlopen(
      "/System/Library/PrivateFrameworks/Apple80211.framework/Apple80211",
      RTLD_LAZY);
  if (!apple_80211_library)
    return NS_ERROR_NOT_AVAILABLE;

  WirelessContextPtr wifi_context_;

  WirelessAttachFunction WirelessAttach_function_ = reinterpret_cast<WirelessAttachFunction>(dlsym(apple_80211_library, "WirelessAttach"));
  WirelessScanSplitFunction WirelessScanSplit_function_ = reinterpret_cast<WirelessScanSplitFunction>(dlsym(apple_80211_library, "WirelessScanSplit"));
  WirelessDetachFunction WirelessDetach_function_ = reinterpret_cast<WirelessDetachFunction>(dlsym(apple_80211_library, "WirelessDetach"));

  if (!WirelessAttach_function_ || !WirelessScanSplit_function_ || !WirelessDetach_function_) {
    dlclose(apple_80211_library);
    return NS_ERROR_NOT_AVAILABLE;
  }

  WIErr err = 0;

  err = (*WirelessAttach_function_)(&wifi_context_, 0);
  if (err != noErr) {
    printf("Error: WirelessAttach: %d\n", (int) err);
    dlclose(apple_80211_library);
    return NS_ERROR_FAILURE;
  }

  // Regularly get the access point data.

  nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
  nsCOMArray<nsWifiAccessPoint> accessPoints;

  do {
    accessPoints.Clear();

    CFArrayRef managed_access_points = NULL;
    CFArrayRef adhoc_access_points = NULL;

    if ((*WirelessScanSplit_function_)(wifi_context_,
                                      &managed_access_points,
                                      &adhoc_access_points,
                                      0) != noErr) {
      return NS_ERROR_FAILURE;
    }

    if (managed_access_points == NULL) {
      return NS_ERROR_FAILURE;
    }

    int accessPointsCount = CFArrayGetCount(managed_access_points);

    for (int i = 0; i < accessPointsCount; ++i) {

      nsWifiAccessPoint* ap = new nsWifiAccessPoint();
      if (!ap)
        continue;

      const WirelessNetworkInfo *access_point_info =
        reinterpret_cast<const WirelessNetworkInfo*>(CFDataGetBytePtr(reinterpret_cast<const CFDataRef>(CFArrayGetValueAtIndex(managed_access_points, i))));

      ap->setMac(access_point_info->macAddress);

      // WirelessNetworkInfo::signal appears to be signal strength in dBm.
      ap->setSignal(access_point_info->signal);

      ap->setSSID(reinterpret_cast<const char*>(access_point_info->name),
                  access_point_info->nameLen);

      accessPoints.AppendObject(ap);
    }

    bool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
    ReplaceArray(lastAccessPoints, accessPoints);

    nsresult rv = CallWifiListeners(lastAccessPoints, accessPointsChanged);
    if (NS_FAILED(rv)) {
        dlclose(apple_80211_library);
        return rv;
    }

    // wait for some reasonable amount of time.  pref?
    LOG(("waiting on monitor\n"));

    ReentrantMonitorAutoEnter mon(mReentrantMonitor);
    mon.Wait(PR_SecondsToInterval(60));
  }
  while (mKeepGoing);

  (*WirelessDetach_function_)(wifi_context_);

  dlclose(apple_80211_library);

  return NS_OK;
}

nsresult
nsWifiMonitor::DoScan()
{
  nsresult rv = DoScanWithCoreWLAN();

  // we can remove this once we stop caring about 10.5.
  if (NS_FAILED(rv))
    rv = DoScanOld();

  return rv;
}