gecko/netwerk/wifi/nsWifiScannerWin.cpp

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2012-05-21 04:12:37 -07:00
/* 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 "windows.h"
#include "wlanapi.h"
#include "stdlib.h"
#include "nsWifiMonitor.h"
#include "nsWifiAccessPoint.h"
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsIMutableArray.h"
using namespace mozilla;
nsresult
nsWifiMonitor::DoScan()
{
HINSTANCE wlan_library = LoadLibrary("Wlanapi.dll");
if (!wlan_library)
return NS_ERROR_NOT_AVAILABLE;
WlanOpenHandleFunction WlanOpenHandle = (WlanOpenHandleFunction) GetProcAddress(wlan_library, "WlanOpenHandle");
WlanEnumInterfacesFunction WlanEnumInterfaces = (WlanEnumInterfacesFunction) GetProcAddress(wlan_library, "WlanEnumInterfaces");
WlanGetNetworkBssListFunction WlanGetNetworkBssList = (WlanGetNetworkBssListFunction) GetProcAddress(wlan_library, "WlanGetNetworkBssList");
WlanFreeMemoryFunction WlanFreeMemory = (WlanFreeMemoryFunction) GetProcAddress(wlan_library, "WlanFreeMemory");
WlanCloseHandleFunction WlanCloseHandle = (WlanCloseHandleFunction) GetProcAddress(wlan_library, "WlanCloseHandle");
if (!WlanOpenHandle ||
!WlanEnumInterfaces ||
!WlanGetNetworkBssList ||
!WlanFreeMemory ||
!WlanCloseHandle)
return NS_ERROR_FAILURE;
// Regularly get the access point data.
nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
nsCOMArray<nsWifiAccessPoint> accessPoints;
do {
accessPoints.Clear();
// Get the handle to the WLAN API.
DWORD negotiated_version;
HANDLE wlan_handle = NULL;
// We could be executing on either Windows XP or Windows Vista, so use the
// lower version of the client WLAN API. It seems that the negotiated version
// is the Vista version irrespective of what we pass!
static const int kXpWlanClientVersion = 1;
if ((*WlanOpenHandle)(kXpWlanClientVersion,
NULL,
&negotiated_version,
&wlan_handle) != ERROR_SUCCESS) {
return NS_ERROR_NOT_AVAILABLE;
}
// try again later.
if (!wlan_handle)
return NS_ERROR_FAILURE;
// Get the list of interfaces. WlanEnumInterfaces allocates interface_list.
WLAN_INTERFACE_INFO_LIST *interface_list = NULL;
if ((*WlanEnumInterfaces)(wlan_handle, NULL, &interface_list) != ERROR_SUCCESS) {
// try again later
(*WlanCloseHandle)(wlan_handle, NULL);
return NS_ERROR_FAILURE;
}
// Go through the list of interfaces and get the data for each.
for (int i = 0; i < static_cast<int>(interface_list->dwNumberOfItems); ++i) {
WLAN_BSS_LIST *bss_list;
HRESULT rv = (*WlanGetNetworkBssList)(wlan_handle,
&interface_list->InterfaceInfo[i].InterfaceGuid,
NULL, // Use all SSIDs.
DOT11_BSS_TYPE_UNUSED,
false, // bSecurityEnabled - unused
NULL, // reserved
&bss_list);
if (rv != ERROR_SUCCESS) {
continue;
}
for (int j = 0; j < static_cast<int>(bss_list->dwNumberOfItems); ++j) {
nsWifiAccessPoint* ap = new nsWifiAccessPoint();
if (!ap)
continue;
const WLAN_BSS_ENTRY bss_entry = bss_list->wlanBssEntries[j];
ap->setMac(bss_entry.dot11Bssid);
ap->setSignal(bss_entry.lRssi);
ap->setSSID((char*) bss_entry.dot11Ssid.ucSSID,
bss_entry.dot11Ssid.uSSIDLength);
accessPoints.AppendObject(ap);
}
(*WlanFreeMemory)(bss_list);
}
// Free interface_list.
(*WlanFreeMemory)(interface_list);
// Close the handle.
(*WlanCloseHandle)(wlan_handle, NULL);
bool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
ReplaceArray(lastAccessPoints, accessPoints);
nsresult 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;
}