mirror of
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231 lines
6.7 KiB
C++
231 lines
6.7 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Geolocation.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* This is a derivative of work done by Google under a BSD style License.
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* See: http://gears.googlecode.com/svn/trunk/gears/geolocation/
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*
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* Contributor(s):
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* Doug Turner <dougt@meer.net> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "iwlib.h"
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#include "dlfcn.h"
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#include "nsWifiMonitor.h"
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#include "nsWifiAccessPoint.h"
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#include "nsIProxyObjectManager.h"
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#include "nsServiceManagerUtils.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIMutableArray.h"
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using namespace mozilla;
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typedef int (*iw_open_t)(void);
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typedef void (*iw_enum_t)(int skfd,
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iw_enum_handler fn,
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char *args[],
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int count);
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typedef int (*iw_stats_t)(int skfd,
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const char *ifname,
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iwstats *stats,
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const iwrange *range,
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int has_range);
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static int scan_wifi(int skfd, char* ifname, char* args[], int count)
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{
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nsCOMArray<nsWifiAccessPoint>* accessPoints = (nsCOMArray<nsWifiAccessPoint>*) args[0];
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iw_stats_t iw_stats = (iw_stats_t) args[1];
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struct iwreq wrq;
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int result = iw_get_ext(skfd, ifname, SIOCGIWMODE, &wrq);
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if (result < 0)
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return 0;
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// We only cared about "Managed" mode. 2 is the magic number. There isn't a #define for this.
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if (wrq.u.mode != 2)
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return 0;
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nsWifiAccessPoint* ap = new nsWifiAccessPoint();
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if (!ap)
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return 0;
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char buffer[128];
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wrq.u.essid.pointer = buffer;
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wrq.u.essid.length = 128;
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wrq.u.essid.flags = 0;
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result = iw_get_ext(skfd, ifname, SIOCGIWESSID, &wrq);
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if (result < 0) {
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delete ap;
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return 0;
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}
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ap->setSSID(buffer, wrq.u.essid.length);
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result = iw_get_ext(skfd, ifname, SIOCGIWAP, &wrq);
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if (result < 0) {
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delete ap;
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return 0;
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}
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ap->setMac( (const uint8*) wrq.u.ap_addr.sa_data );
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iwrange range;
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iwstats stats;
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result = (*iw_stats)(skfd, ifname, &stats, &range, 1);
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if (result < 0) {
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delete ap;
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return 0;
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}
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if(stats.qual.level > range.max_qual.level)
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ap->setSignal(stats.qual.level - 0x100);
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else
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ap->setSignal(0);
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accessPoints->AppendObject(ap);
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return 0;
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}
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nsresult
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nsWifiMonitor::DoScan()
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{
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void* iwlib_handle = dlopen("libiw.so", RTLD_NOW);
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if (!iwlib_handle) {
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iwlib_handle = dlopen("libiw.so.29", RTLD_NOW);
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if (!iwlib_handle) {
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iwlib_handle = dlopen("libiw.so.30", RTLD_NOW);
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if (!iwlib_handle) {
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LOG(("Could not load libiw\n"));
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return NS_ERROR_NOT_AVAILABLE;
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}
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}
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}
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else {
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LOG(("Loaded libiw\n"));
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}
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iw_open_t iw_open = (iw_open_t) dlsym(iwlib_handle, "iw_sockets_open");
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iw_enum_t iw_enum = (iw_enum_t) dlsym(iwlib_handle, "iw_enum_devices");
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iw_stats_t iw_stats = (iw_stats_t)dlsym(iwlib_handle, "iw_get_stats");
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if (!iw_open || !iw_enum || !iw_stats) {
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dlclose(iwlib_handle);
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LOG(("Could not load a symbol from iwlib.so\n"));
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return NS_ERROR_FAILURE;
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}
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int skfd = (*iw_open)();
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if (skfd < 0) {
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dlclose(iwlib_handle);
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return NS_ERROR_FAILURE;
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}
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nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
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nsCOMArray<nsWifiAccessPoint> accessPoints;
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char* args[] = {(char*) &accessPoints, (char*) iw_stats, nsnull };
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while (mKeepGoing) {
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accessPoints.Clear();
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(*iw_enum)(skfd, &scan_wifi, args, 1);
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PRBool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
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nsCOMArray<nsIWifiListener> currentListeners;
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{
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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for (PRUint32 i = 0; i < mListeners.Length(); i++) {
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if (!mListeners[i].mHasSentData || accessPointsChanged) {
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mListeners[i].mHasSentData = PR_TRUE;
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currentListeners.AppendObject(mListeners[i].mListener);
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}
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}
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}
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ReplaceArray(lastAccessPoints, accessPoints);
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if (currentListeners.Count() > 0)
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{
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PRUint32 resultCount = lastAccessPoints.Count();
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nsIWifiAccessPoint** result = static_cast<nsIWifiAccessPoint**> (nsMemory::Alloc(sizeof(nsIWifiAccessPoint*) * resultCount));
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if (!result) {
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dlclose(iwlib_handle);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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for (PRUint32 i = 0; i < resultCount; i++)
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result[i] = lastAccessPoints[i];
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for (PRInt32 i = 0; i < currentListeners.Count(); i++) {
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LOG(("About to send data to the wifi listeners\n"));
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nsCOMPtr<nsIWifiListener> proxy;
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nsCOMPtr<nsIProxyObjectManager> proxyObjMgr = do_GetService("@mozilla.org/xpcomproxy;1");
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proxyObjMgr->GetProxyForObject(NS_PROXY_TO_MAIN_THREAD,
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NS_GET_IID(nsIWifiListener),
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currentListeners[i],
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NS_PROXY_SYNC | NS_PROXY_ALWAYS,
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getter_AddRefs(proxy));
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if (!proxy) {
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LOG(("There is no proxy available. this should never happen\n"));
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}
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else
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{
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nsresult rv = proxy->OnChange(result, resultCount);
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LOG( ("... sent %d\n", rv));
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}
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}
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nsMemory::Free(result);
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}
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LOG(("waiting on monitor\n"));
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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mon.Wait(PR_SecondsToInterval(60));
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}
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iw_sockets_close(skfd);
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return NS_OK;
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}
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