gecko/netwerk/wifi/nsWifiScannerUnix.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 "iwlib.h"
#include "dlfcn.h"
#include "nsAutoPtr.h"
#include "nsWifiMonitor.h"
#include "nsWifiAccessPoint.h"
#include "nsIProxyObjectManager.h"
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsIMutableArray.h"
typedef int (*iw_open_t)(void);
typedef void (*iw_enum_t)(int skfd,
iw_enum_handler fn,
char *args[],
int count);
typedef int (*iw_stats_t)(int skfd,
const char *ifname,
iwstats *stats,
const iwrange *range,
int has_range);
static int scan_wifi(int skfd, char* ifname, char* args[], int count)
{
nsCOMArray<nsWifiAccessPoint>* accessPoints = (nsCOMArray<nsWifiAccessPoint>*) args[0];
iw_stats_t iw_stats = (iw_stats_t) args[1];
struct iwreq wrq;
int result = iw_get_ext(skfd, ifname, SIOCGIWMODE, &wrq);
if (result < 0)
return 0;
// We only cared about "Managed" mode. 2 is the magic number. There isn't a #define for this.
if (wrq.u.mode != 2)
return 0;
nsWifiAccessPoint* ap = new nsWifiAccessPoint();
if (!ap)
return 0;
char buffer[128];
wrq.u.essid.pointer = buffer;
wrq.u.essid.length = 128;
wrq.u.essid.flags = 0;
result = iw_get_ext(skfd, ifname, SIOCGIWESSID, &wrq);
if (result < 0) {
delete ap;
return 0;
}
ap->setSSID(buffer, wrq.u.essid.length);
result = iw_get_ext(skfd, ifname, SIOCGIWAP, &wrq);
if (result < 0) {
delete ap;
return 0;
}
ap->setMac( (const uint8*) wrq.u.ap_addr.sa_data );
iwrange range;
iwstats stats;
result = (*iw_stats)(skfd, ifname, &stats, &range, 1);
if (result < 0) {
delete ap;
return 0;
}
if(stats.qual.level > range.max_qual.level)
ap->setSignal(stats.qual.level - 0x100);
else
ap->setSignal(0);
accessPoints->AppendObject(ap);
return 0;
}
nsresult
nsWifiMonitor::DoScan()
{
void* iwlib_handle = dlopen("libiw.so", RTLD_NOW);
if (!iwlib_handle) {
iwlib_handle = dlopen("libiw.so.29", RTLD_NOW);
if (!iwlib_handle) {
iwlib_handle = dlopen("libiw.so.30", RTLD_NOW);
if (!iwlib_handle) {
LOG(("Could not load libiw\n"));
return NS_ERROR_NOT_AVAILABLE;
}
}
}
else {
LOG(("Loaded libiw\n"));
}
iw_open_t iw_open = (iw_open_t) dlsym(iwlib_handle, "iw_sockets_open");
iw_enum_t iw_enum = (iw_enum_t) dlsym(iwlib_handle, "iw_enum_devices");
iw_stats_t iw_stats = (iw_stats_t)dlsym(iwlib_handle, "iw_get_stats");
if (!iw_open || !iw_enum || !iw_stats) {
dlclose(iwlib_handle);
LOG(("Could not load a symbol from iwlib.so\n"));
return NS_ERROR_FAILURE;
}
int skfd = (*iw_open)();
if (skfd < 0) {
dlclose(iwlib_handle);
return NS_ERROR_FAILURE;
}
nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
nsCOMArray<nsWifiAccessPoint> accessPoints;
char* args[] = {(char*) &accessPoints, (char*) iw_stats, nsnull };
while (mKeepGoing) {
accessPoints.Clear();
(*iw_enum)(skfd, &scan_wifi, args, 1);
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(iwlib_handle);
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);
}
LOG(("waiting on monitor\n"));
nsAutoMonitor mon(mMonitor);
mon.Wait(PR_SecondsToInterval(60));
}
iw_sockets_close(skfd);
return NS_OK;
}