gecko/netwerk/wifi/nsWifiScannerMac.cpp

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Geolocation.
*
* The Initial Developer of the Original Code is Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* This is a derivative of work done by Google under a BSD style License.
* See: http://gears.googlecode.com/svn/trunk/gears/geolocation/
*
* Contributor(s):
* Doug Turner <dougt@meer.net> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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 "nsIProxyObjectManager.h"
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsIMutableArray.h"
// 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;
PRBool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
nsCOMArray<nsIWifiListener> currentListeners;
{
nsAutoMonitor mon(mMonitor);
for (PRUint32 i = 0; i < mListeners.Length(); i++) {
if (!mListeners[i].mHasSentData || accessPointsChanged) {
mListeners[i].mHasSentData = PR_TRUE;
currentListeners.AppendObject(mListeners[i].mListener);
}
}
}
ReplaceArray(lastAccessPoints, accessPoints);
if (currentListeners.Count() > 0)
{
PRUint32 resultCount = lastAccessPoints.Count();
nsIWifiAccessPoint** result = static_cast<nsIWifiAccessPoint**> (nsMemory::Alloc(sizeof(nsIWifiAccessPoint*) * resultCount));
if (!result) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (PRUint32 i = 0; i < resultCount; i++)
result[i] = lastAccessPoints[i];
for (PRInt32 i = 0; i < currentListeners.Count(); i++) {
LOG(("About to send data to the wifi listeners\n"));
nsCOMPtr<nsIWifiListener> proxy;
nsCOMPtr<nsIProxyObjectManager> proxyObjMgr = do_GetService("@mozilla.org/xpcomproxy;1");
proxyObjMgr->GetProxyForObject(NS_PROXY_TO_MAIN_THREAD,
NS_GET_IID(nsIWifiListener),
currentListeners[i],
NS_PROXY_SYNC | NS_PROXY_ALWAYS,
getter_AddRefs(proxy));
if (!proxy) {
LOG(("There is no proxy available. this should never happen\n"));
}
else
{
nsresult rv = proxy->OnChange(result, resultCount);
LOG( ("... sent %d\n", rv));
}
}
nsMemory::Free(result);
}
// wait for some reasonable amount of time. pref?
LOG(("waiting on monitor\n"));
nsAutoMonitor mon(mMonitor);
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) {
continue;
}
if (managed_access_points == NULL) {
continue;
}
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);
}
PRBool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
nsCOMArray<nsIWifiListener> currentListeners;
{
nsAutoMonitor mon(mMonitor);
for (PRUint32 i = 0; i < mListeners.Length(); i++) {
if (!mListeners[i].mHasSentData || accessPointsChanged) {
mListeners[i].mHasSentData = PR_TRUE;
currentListeners.AppendObject(mListeners[i].mListener);
}
}
}
ReplaceArray(lastAccessPoints, accessPoints);
if (currentListeners.Count() > 0)
{
PRUint32 resultCount = lastAccessPoints.Count();
nsIWifiAccessPoint** result = static_cast<nsIWifiAccessPoint**> (nsMemory::Alloc(sizeof(nsIWifiAccessPoint*) * resultCount));
if (!result) {
dlclose(apple_80211_library);
return NS_ERROR_OUT_OF_MEMORY;
}
for (PRUint32 i = 0; i < resultCount; i++)
result[i] = lastAccessPoints[i];
for (PRInt32 i = 0; i < currentListeners.Count(); i++) {
LOG(("About to send data to the wifi listeners\n"));
nsCOMPtr<nsIWifiListener> proxy;
nsCOMPtr<nsIProxyObjectManager> proxyObjMgr = do_GetService("@mozilla.org/xpcomproxy;1");
proxyObjMgr->GetProxyForObject(NS_PROXY_TO_MAIN_THREAD,
NS_GET_IID(nsIWifiListener),
currentListeners[i],
NS_PROXY_SYNC | NS_PROXY_ALWAYS,
getter_AddRefs(proxy));
if (!proxy) {
LOG(("There is no proxy available. this should never happen\n"));
}
else
{
nsresult rv = proxy->OnChange(result, resultCount);
LOG( ("... sent %d\n", rv));
}
}
nsMemory::Free(result);
}
// wait for some reasonable amount of time. pref?
LOG(("waiting on monitor\n"));
nsAutoMonitor mon(mMonitor);
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;
}