Wie kann ich abrufen die Signalstärke von in der Nähe wireless-LAN-Netzwerke auf Windows mit Python?

Ich würde gerne entweder Karte oder Diagramm die Werte.

Bitte geben Sie Ihre Plattform (Windows, Linux, ...)
Ich bin mit windows.

InformationsquelleAutor kame | 2010-05-17

Wenn Sie auf Windows, werden Sie wahrscheinlich wollen, um Nutzung der WLAN-API, die bietet die "WlanGetAvailableNetworkList ()" - Funktion (siehe API-docs für die Nutzung). Ich bin mir nicht bewusst irgendwelche python-Wrapper für WLANAPI.DLL so haben Sie möglicherweise wickeln Sie es sich mit ctypes. Ich habe eine vorläufige Skript, das dies tut (works-for-me), aber kann es sein crufty. Sie wollen Lesen Sie die Dokumentation zu verstehen, die Bedeutung aller Felder:

from ctypes import *
from ctypes.wintypes import *
from sys import exit


def customresize(array, new_size):
    return (array._type_*new_size).from_address(addressof(array))

wlanapi = windll.LoadLibrary('wlanapi.dll')

ERROR_SUCCESS = 0

class GUID(Structure):
    _fields_ = [
        ('Data1', c_ulong),
        ('Data2', c_ushort),
        ('Data3', c_ushort),
        ('Data4', c_ubyte*8),
        ]

WLAN_INTERFACE_STATE = c_uint
(wlan_interface_state_not_ready,
 wlan_interface_state_connected,
 wlan_interface_state_ad_hoc_network_formed,
 wlan_interface_state_disconnecting,
 wlan_interface_state_disconnected,
 wlan_interface_state_associating,
 wlan_interface_state_discovering,
 wlan_interface_state_authenticating) = map(WLAN_INTERFACE_STATE, range(0, 8))

class WLAN_INTERFACE_INFO(Structure):
    _fields_ = [
        ("InterfaceGuid", GUID),
        ("strInterfaceDescription", c_wchar * 256),
        ("isState", WLAN_INTERFACE_STATE)
        ]

class WLAN_INTERFACE_INFO_LIST(Structure):
    _fields_ = [
        ("NumberOfItems", DWORD),
        ("Index", DWORD),
        ("InterfaceInfo", WLAN_INTERFACE_INFO * 1)
        ]

WLAN_MAX_PHY_TYPE_NUMBER = 0x8
DOT11_SSID_MAX_LENGTH = 32
WLAN_REASON_CODE = DWORD
DOT11_BSS_TYPE = c_uint
(dot11_BSS_type_infrastructure,
 dot11_BSS_type_independent,
 dot11_BSS_type_any) = map(DOT11_BSS_TYPE, range(1, 4))
DOT11_PHY_TYPE = c_uint
dot11_phy_type_unknown      = 0
dot11_phy_type_any          = 0
dot11_phy_type_fhss         = 1
dot11_phy_type_dsss         = 2
dot11_phy_type_irbaseband   = 3
dot11_phy_type_ofdm         = 4
dot11_phy_type_hrdsss       = 5
dot11_phy_type_erp          = 6
dot11_phy_type_ht           = 7
dot11_phy_type_IHV_start    = 0x80000000
dot11_phy_type_IHV_end      = 0xffffffff 

DOT11_AUTH_ALGORITHM = c_uint
DOT11_AUTH_ALGO_80211_OPEN         = 1
DOT11_AUTH_ALGO_80211_SHARED_KEY   = 2
DOT11_AUTH_ALGO_WPA                = 3
DOT11_AUTH_ALGO_WPA_PSK            = 4
DOT11_AUTH_ALGO_WPA_NONE           = 5
DOT11_AUTH_ALGO_RSNA               = 6
DOT11_AUTH_ALGO_RSNA_PSK           = 7
DOT11_AUTH_ALGO_IHV_START          = 0x80000000
DOT11_AUTH_ALGO_IHV_END            = 0xffffffff

DOT11_CIPHER_ALGORITHM = c_uint
DOT11_CIPHER_ALGO_NONE            = 0x00
DOT11_CIPHER_ALGO_WEP40           = 0x01
DOT11_CIPHER_ALGO_TKIP            = 0x02
DOT11_CIPHER_ALGO_CCMP            = 0x04
DOT11_CIPHER_ALGO_WEP104          = 0x05
DOT11_CIPHER_ALGO_WPA_USE_GROUP   = 0x100
DOT11_CIPHER_ALGO_RSN_USE_GROUP   = 0x100
DOT11_CIPHER_ALGO_WEP             = 0x101
DOT11_CIPHER_ALGO_IHV_START       = 0x80000000
DOT11_CIPHER_ALGO_IHV_END         = 0xffffffff 

WLAN_AVAILABLE_NETWORK_CONNECTED = 1
WLAN_AVAILABLE_NETWORK_HAS_PROFILE = 2

WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_ADHOC_PROFILES = 0x00000001
WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES = 0x00000002

class DOT11_SSID(Structure):
    _fields_ = [
        ("SSIDLength", c_ulong),
        ("SSID", c_char * DOT11_SSID_MAX_LENGTH)
        ]

class WLAN_AVAILABLE_NETWORK(Structure):
    _fields_ = [
        ("ProfileName", c_wchar * 256),
        ("dot11Ssid", DOT11_SSID),
        ("dot11BssType", DOT11_BSS_TYPE),
        ("NumberOfBssids", c_ulong),
        ("NetworkConnectable", c_bool),
        ("wlanNotConnectableReason", WLAN_REASON_CODE),
        ("NumberOfPhyTypes", c_ulong),
        ("dot11PhyTypes", DOT11_PHY_TYPE * WLAN_MAX_PHY_TYPE_NUMBER),
        ("MorePhyTypes", c_bool),
        ("wlanSignalQuality", c_ulong),
        ("SecurityEnabled", c_bool),
        ("dot11DefaultAuthAlgorithm", DOT11_AUTH_ALGORITHM),
        ("dot11DefaultCipherAlgorithm", DOT11_CIPHER_ALGORITHM),
        ("Flags", DWORD),
        ("Reserved", DWORD)
        ]

class WLAN_AVAILABLE_NETWORK_LIST(Structure):
    _fields_ = [
        ("NumberOfItems", DWORD),
        ("Index", DWORD),
        ("Network", WLAN_AVAILABLE_NETWORK * 1)
        ]

WlanOpenHandle = wlanapi.WlanOpenHandle
WlanOpenHandle.argtypes = (DWORD, c_void_p, POINTER(DWORD), POINTER(HANDLE))
WlanOpenHandle.restype = DWORD

WlanEnumInterfaces = wlanapi.WlanEnumInterfaces
WlanEnumInterfaces.argtypes = (HANDLE, c_void_p, 
                               POINTER(POINTER(WLAN_INTERFACE_INFO_LIST)))
WlanEnumInterfaces.restype = DWORD

WlanGetAvailableNetworkList = wlanapi.WlanGetAvailableNetworkList
WlanGetAvailableNetworkList.argtypes = (HANDLE, POINTER(GUID), DWORD, c_void_p, 
                                        POINTER(POINTER(WLAN_AVAILABLE_NETWORK_LIST)))
WlanGetAvailableNetworkList.restype = DWORD

WlanFreeMemory = wlanapi.WlanFreeMemory
WlanFreeMemory.argtypes = [c_void_p]


if __name__ == '__main__':
    NegotiatedVersion = DWORD()
    ClientHandle = HANDLE()
    ret = WlanOpenHandle(1, None, byref(NegotiatedVersion), byref(ClientHandle))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))

    # find all wireless network interfaces
    pInterfaceList = pointer(WLAN_INTERFACE_INFO_LIST())
    ret = WlanEnumInterfaces(ClientHandle, None, byref(pInterfaceList))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))

    try:
        ifaces = customresize(pInterfaceList.contents.InterfaceInfo,
                              pInterfaceList.contents.NumberOfItems)
        # find each available network for each interface
        for iface in ifaces:
            print("Interface: {}".format(iface.strInterfaceDescription))
            pAvailableNetworkList = pointer(WLAN_AVAILABLE_NETWORK_LIST())
            ret = WlanGetAvailableNetworkList(ClientHandle, 
                                        byref(iface.InterfaceGuid),
                                        0,
                                        None,
                                        byref(pAvailableNetworkList))
            if ret != ERROR_SUCCESS:
                exit(FormatError(ret))
            try:
                avail_net_list = pAvailableNetworkList.contents
                networks = customresize(avail_net_list.Network, 
                                        avail_net_list.NumberOfItems)
                for network in networks:
                    print("SSID: {}, quality: {:2d}%".format(
                        network.dot11Ssid.SSID[:network.dot11Ssid.SSIDLength].decode(),
                        network.wlanSignalQuality))
            finally:
                WlanFreeMemory(pAvailableNetworkList)
    finally:
        WlanFreeMemory(pInterfaceList)

Auf linux, Sie haben ein paar Möglichkeiten:

Den standard-Optionen ist zum Parsen der Ausgabe von iwlist -scan. Allerdings, wenn Sie derzeit mit einem wlan verbunden und läuft nicht als root, es gibt nur die aktuell verbundene wlan.

Wenn du mehr brauchst als diese, die beste Möglichkeit ist eine Abfrage der WLAN-manager-daemon. Auf modernen Linux-Versionen ist dies in der Regel NetworkManager, obwohl wicd wird immer beliebter. Beide Manager können abgefragt werden mit dbus. Es sei denn, Sie können kontrollieren, was die Kunden haben auf Ihren Systemen, müssen Sie möglicherweise die Unterstützung beide dieser Optionen, oder zumindest eine option und haben ein fallback für iwlist.

InformationsquelleAutor fmark

5

Wenn Sie nicht wollen, befassen sich mit der Windows API, die Sie verwenden könnte, die Methode gezeigt, hier mit eine leichte Modifikation.

Können Sie diesen Befehl verwenden:
```
netsh wlan show networks mode=Bssid
```
mit diesem code
```
import subprocess
results = subprocess.check_output(["netsh", "wlan", "show", "network", "mode=Bssid"])
```
Dies wird Ihnen additiona "Signal" - Informationen in Prozent an. Diese können konvertiert werden, um RSSI mit diese Methode.

InformationsquelleAutor gmag11
0

Gut Sie konnten, rufen Sie das system-Befehl zu bekommen, dass die info (Linux = iwlist), analysieren das Ergebnis und zeigt es an.

InformationsquelleAutor Joshua

@fmark ich wollte nur sagen, vielen DANK für diese awesome post. Bei meiner Arbeit habe ich versucht zu bekommen, RSSI, von den angeschlossenen AP in Windows, und Sie verdienen vielen Dank für mich endlich erledigt. Ich bin derzeit auf der Liste alle APs, aber ich arbeite an der Modifikation. Ich wollte, um eine Empfehlung gegen deinen code. Ich bin nicht sehr erfahren mit C oder Python-CTypes-Modul, aber ich denke, ich könnte Sie gefunden haben, einen möglichen Fehler. Ich bin wirklich nicht sicher, welchen Unterschied es macht, aber ich merkte:

Definieren Sie Enumerationen wie diese:

DOT11_BSS_TYPE = c_uint
(dot11_BSS_type_infrastructure,
 dot11_BSS_type_independent,
 dot11_BSS_type_any) = map(DOT11_BSS_TYPE, xrange(1, 4))

Aber dann andere Zeiten, die Sie definieren, etwas sehr ähnlich wie diese:

DOT11_PHY_TYPE = c_uint
dot11_phy_type_unknown      = 0
dot11_phy_type_any          = 0
dot11_phy_type_fhss         = 1
dot11_phy_type_dsss         = 2
dot11_phy_type_irbaseband   = 3
dot11_phy_type_ofdm         = 4
dot11_phy_type_hrdsss       = 5
dot11_phy_type_erp          = 6
dot11_phy_type_ht           = 7
dot11_phy_type_IHV_start    = 0x80000000
dot11_phy_type_IHV_end      = 0xffffffff

Ich denke, dass die zweite snippit sollte modelliert werden wie die erste, aber ich könnte falsch sein. Hier war meine Idee:

DOT11_PHY_TYPE = c_uint
(dot11_phy_type_unknown,
 dot11_phy_type_any,
 dot11_phy_type_fhss,
 dot11_phy_type_dsss,
 dot11_phy_type_irbaseband,
 dot11_phy_type_ofdm,
 dot11_phy_type_hrdsss,
 dot11_phy_type_erp,
 dot11_phy_type_ht,
 dot11_phy_type_IHV_start,
 dot11_phy_type_IHV_end) = map(DOT11_PHY_TYPE,
                               [0,0,1,2,3,4,
                                5,6,7,0x80000000,
                                0xffffffff])

Diese Weise jene Werte richtig zugeordnet DOT11_PHY_TYPE. Vielleicht bin ich völlig falsch, aber für die Zukunft Leute wie mich, ich wollte nur was gestolpert, hier richtig zu sein 🙂
Nochmals vielen Dank, @fmark.

InformationsquelleAutor millertime

Also.. ich basierte mich auf @fmarks code (das war ein live-sicherer für mich), und Sie sollten den WlanScan-Funktion, oder aber die RSSI Werte nicht aktualisieren.

Hier mein erweiterter code!

Alle Requisiten an @fmarks!

__author__ = 'Pedro Gomes'

import time
from ctypes import *
from ctypes.wintypes import *
from sys import exit

def customresize(array, new_size):
    return (array._type_*new_size).from_address(addressof(array))

wlanapi = windll.LoadLibrary('wlanapi.dll')

ERROR_SUCCESS = 0

class GUID(Structure):
    _fields_ = [
        ('Data1', c_ulong),
        ('Data2', c_ushort),
        ('Data3', c_ushort),
        ('Data4', c_ubyte*8),
        ]

WLAN_INTERFACE_STATE = c_uint
(wlan_interface_state_not_ready,
 wlan_interface_state_connected,
 wlan_interface_state_ad_hoc_network_formed,
 wlan_interface_state_disconnecting,
 wlan_interface_state_disconnected,
 wlan_interface_state_associating,
 wlan_interface_state_discovering,
 wlan_interface_state_authenticating) = map(WLAN_INTERFACE_STATE, xrange(0, 8))

class WLAN_INTERFACE_INFO(Structure):
    _fields_ = [
        ("InterfaceGuid", GUID),
        ("strInterfaceDescription", c_wchar * 256),
        ("isState", WLAN_INTERFACE_STATE)
    ]

class WLAN_INTERFACE_INFO_LIST(Structure):
    _fields_ = [
        ("NumberOfItems", DWORD),
        ("Index", DWORD),
        ("InterfaceInfo", WLAN_INTERFACE_INFO * 1)
    ]

WLAN_MAX_PHY_TYPE_NUMBER = 0x8
DOT11_SSID_MAX_LENGTH = 32
WLAN_REASON_CODE = DWORD

DOT11_BSS_TYPE = c_uint
(dot11_BSS_type_infrastructure,
 dot11_BSS_type_independent,
 dot11_BSS_type_any) = map(DOT11_BSS_TYPE, xrange(1, 4))

DOT11_PHY_TYPE = c_uint
dot11_phy_type_unknown      = 0
dot11_phy_type_any          = 0
dot11_phy_type_fhss         = 1
dot11_phy_type_dsss         = 2
dot11_phy_type_irbaseband   = 3
dot11_phy_type_ofdm         = 4
dot11_phy_type_hrdsss       = 5
dot11_phy_type_erp          = 6
dot11_phy_type_ht           = 7
dot11_phy_type_IHV_start    = 0x80000000
dot11_phy_type_IHV_end      = 0xffffffff

DOT11_AUTH_ALGORITHM = c_uint
DOT11_AUTH_ALGO_80211_OPEN         = 1
DOT11_AUTH_ALGO_80211_SHARED_KEY   = 2
DOT11_AUTH_ALGO_WPA                = 3
DOT11_AUTH_ALGO_WPA_PSK            = 4
DOT11_AUTH_ALGO_WPA_NONE           = 5
DOT11_AUTH_ALGO_RSNA               = 6
DOT11_AUTH_ALGO_RSNA_PSK           = 7
DOT11_AUTH_ALGO_IHV_START          = 0x80000000
DOT11_AUTH_ALGO_IHV_END            = 0xffffffff

DOT11_CIPHER_ALGORITHM = c_uint
DOT11_CIPHER_ALGO_NONE            = 0x00
DOT11_CIPHER_ALGO_WEP40           = 0x01
DOT11_CIPHER_ALGO_TKIP            = 0x02
DOT11_CIPHER_ALGO_CCMP            = 0x04
DOT11_CIPHER_ALGO_WEP104          = 0x05
DOT11_CIPHER_ALGO_WPA_USE_GROUP   = 0x100
DOT11_CIPHER_ALGO_RSN_USE_GROUP   = 0x100
DOT11_CIPHER_ALGO_WEP             = 0x101
DOT11_CIPHER_ALGO_IHV_START       = 0x80000000
DOT11_CIPHER_ALGO_IHV_END         = 0xffffffff

WLAN_AVAILABLE_NETWORK_CONNECTED = 1
WLAN_AVAILABLE_NETWORK_HAS_PROFILE = 2

WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_ADHOC_PROFILES = 0x00000001
WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_MANUAL_HIDDEN_PROFILES = 0x00000002

class DOT11_SSID(Structure):
    _fields_ = [
        ("SSIDLength", c_ulong),
        ("SSID", c_char * DOT11_SSID_MAX_LENGTH)
    ]


class WLAN_AVAILABLE_NETWORK(Structure):
    _fields_ = [
        ("ProfileName", c_wchar * 256),
        ("dot11Ssid", DOT11_SSID),
        ("dot11BssType", DOT11_BSS_TYPE),
        ("NumberOfBssids", c_ulong),
        ("NetworkConnectable", c_bool),
        ("wlanNotConnectableReason", WLAN_REASON_CODE),
        ("NumberOfPhyTypes", c_ulong),
        ("dot11PhyTypes", DOT11_PHY_TYPE * WLAN_MAX_PHY_TYPE_NUMBER),
        ("MorePhyTypes", c_bool),
        ("wlanSignalQuality", c_ulong),
        ("SecurityEnabled", c_bool),
        ("dot11DefaultAuthAlgorithm", DOT11_AUTH_ALGORITHM),
        ("dot11DefaultCipherAlgorithm", DOT11_CIPHER_ALGORITHM),
        ("Flags", DWORD),
        ("Reserved", DWORD)
    ]

class WLAN_AVAILABLE_NETWORK_LIST(Structure):
    _fields_ = [
        ("NumberOfItems", DWORD),
        ("Index", DWORD),
        ("Network", WLAN_AVAILABLE_NETWORK * 1)
    ]


DOT11_MAC_ADDRESS = c_ubyte * 6

DOT11_CIPHER_ALGORITHM = c_uint
DOT11_CIPHER_ALGO_NONE            = 0x00
DOT11_CIPHER_ALGO_WEP40           = 0x01
DOT11_CIPHER_ALGO_TKIP            = 0x02

DOT11_PHY_TYPE = c_uint
DOT11_PHY_TYPE_UNKNOWN  = 0
DOT11_PHY_TYPE_ANY         = 0
DOT11_PHY_TYPE_FHSS        = 1
DOT11_PHY_TYPE_DSSS        = 2
DOT11_PHY_TYPE_IRBASEBAND  = 3
DOT11_PHY_TYPE_OFDM        = 4
DOT11_PHY_TYPE_HRDSSS      = 5
DOT11_PHY_TYPE_ERP         = 6
DOT11_PHY_TYPE_HT          = 7
DOT11_PHY_TYPE_IHV_START   = 0X80000000
DOT11_PHY_TYPE_IHV_END     = 0XFFFFFFFF

class WLAN_RATE_SET(Structure):
    _fields_ = [
        ("uRateSetLength", c_ulong),
        ("usRateSet", c_ushort * 126)
    ]

class WLAN_BSS_ENTRY(Structure):
    _fields_ = [
        ("dot11Ssid",DOT11_SSID),
        ("uPhyId",c_ulong),
        ("dot11Bssid", DOT11_MAC_ADDRESS),
        ("dot11BssType", DOT11_BSS_TYPE),
        ("dot11BssPhyType", DOT11_PHY_TYPE),
        ("lRssi", c_long),
        ("uLinkQuality", c_ulong),
        ("bInRegDomain", c_bool),
        ("usBeaconPeriod",c_ushort),
        ("ullTimestamp", c_ulonglong),
        ("ullHostTimestamp",c_ulonglong),
        ("usCapabilityInformation",c_ushort),
        ("ulChCenterFrequency", c_ulong),
        ("wlanRateSet",WLAN_RATE_SET),
        ("ulIeOffset", c_ulong),
        ("ulIeSize", c_ulong)]

class WLAN_BSS_LIST(Structure):
    _fields_ = [
        ("TotalSize", DWORD),
        ("NumberOfItems", DWORD),
        ("NetworkBSS", WLAN_BSS_ENTRY * 1)
    ]

class WLAN_AVAILABLE_NETWORK_LIST_BSS(Structure):
    _fields_ = [
        ("TotalSize", DWORD),
        ("NumberOfItems", DWORD),
        ("Network", WLAN_BSS_ENTRY * 1)
    ]

WlanOpenHandle = wlanapi.WlanOpenHandle
WlanOpenHandle.argtypes = (DWORD, c_void_p, POINTER(DWORD), POINTER(HANDLE))
WlanOpenHandle.restype = DWORD

WlanCloseHandle = wlanapi.WlanCloseHandle
WlanCloseHandle.argtypes = (HANDLE, c_void_p)
WlanCloseHandle.restype = DWORD

WlanEnumInterfaces = wlanapi.WlanEnumInterfaces
WlanEnumInterfaces.argtypes = (HANDLE, c_void_p,
                               POINTER(POINTER(WLAN_INTERFACE_INFO_LIST)))
WlanEnumInterfaces.restype = DWORD

WlanGetAvailableNetworkList = wlanapi.WlanGetAvailableNetworkList
WlanGetAvailableNetworkList.argtypes = (HANDLE, POINTER(GUID), DWORD, c_void_p,
                                        POINTER(POINTER(WLAN_AVAILABLE_NETWORK_LIST)))
WlanGetAvailableNetworkList.restype = DWORD

WlanGetNetworkBssList = wlanapi.WlanGetNetworkBssList
WlanGetNetworkBssList.argtypes = (HANDLE, POINTER(GUID),POINTER(GUID),POINTER(GUID), c_bool, c_void_p,
                                  POINTER(POINTER(WLAN_BSS_LIST)))
WlanGetNetworkBssList.restype = DWORD


WlanFreeMemory = wlanapi.WlanFreeMemory
WlanFreeMemory.argtypes = [c_void_p]


WlanScan = wlanapi.WlanScan
WlanScan.argtypes = (HANDLE, POINTER(GUID),c_void_p,c_void_p, c_void_p)
WlanScan.restype = DWORD




def get_interface():

    NegotiatedVersion = DWORD()
    ClientHandle = HANDLE()
    ret = WlanOpenHandle(1, None, byref(NegotiatedVersion), byref(ClientHandle))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))
        # find all wireless network interfaces
    pInterfaceList = pointer(WLAN_INTERFACE_INFO_LIST())
    ret = WlanEnumInterfaces(ClientHandle, None, byref(pInterfaceList))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))
    try:
        ifaces = customresize(pInterfaceList.contents.InterfaceInfo,
                              pInterfaceList.contents.NumberOfItems)
        # find each available network for each interface
        for iface in ifaces:
            #print "Interface: %s" % (iface.strInterfaceDescription)
            interface = iface.strInterfaceDescription

    finally:
        WlanFreeMemory(pInterfaceList)
        return interface

class MAC_BSSID_POWER:
    """Classe para os valores retirados"""
    def __init__(self, mac, bssid):

        self.mac = str(mac)
        self.bssid = str(bssid)
        self.valores = []

    def addPower(self,power):
        self.valores.append(int(power))

    def getBssid(self):
        return self.bssid
    def getPowers(self):
        return self.valores
    def getMac(self):
        return self.mac


def get_BSSI():

    BSSI_Values={}

    NegotiatedVersion = DWORD()
    ClientHandle = HANDLE()
    ret = WlanOpenHandle(1, None, byref(NegotiatedVersion), byref(ClientHandle))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))
        # find all wireless network interfaces
    pInterfaceList = pointer(WLAN_INTERFACE_INFO_LIST())
    ret = WlanEnumInterfaces(ClientHandle, None, byref(pInterfaceList))
    if ret != ERROR_SUCCESS:
        exit(FormatError(ret))
    try:
        ifaces = customresize(pInterfaceList.contents.InterfaceInfo,
                              pInterfaceList.contents.NumberOfItems)
        # find each available network for each interface
        for iface in ifaces:
            # print "Interface: %s" % (iface.strInterfaceDescription)

            pAvailableNetworkList2 = pointer(WLAN_BSS_LIST())


            ret2 = WlanGetNetworkBssList(ClientHandle,
                                         byref(iface.InterfaceGuid),
                                         None,
                                         None,True,None,
                                         byref(pAvailableNetworkList2))
            if ret2 != ERROR_SUCCESS:
                exit(FormatError(ret2))
            try:
                retScan = WlanScan(ClientHandle,byref(iface.InterfaceGuid),None,None,None)
                if retScan != ERROR_SUCCESS:
                    exit(FormatError(retScan))
                avail_net_list2 = pAvailableNetworkList2.contents
                networks2 = customresize(avail_net_list2.NetworkBSS,
                                         avail_net_list2.NumberOfItems)

                for network in networks2:

                    SSID = str(network.dot11Ssid.SSID[:network.dot11Ssid.SSIDLength])
                    BSSID = ':'.join('%02x' % b for b in network.dot11Bssid).upper()
                    signal_strength = str(network.lRssi)

                #    print "SSID: " + SSID + " BSSID: "+ BSSID+ " SS: "+signal_strength

                    BSSI_Values[BSSID] = [SSID,signal_strength]

                    #print "Total "+str(len(networks2))
                    #print BSSI_Values

            finally:
                WlanFreeMemory(pAvailableNetworkList2)
                WlanCloseHandle(ClientHandle,None)
    finally:
        WlanFreeMemory(pInterfaceList)
    return BSSI_Values


def get_BSSI_times_and_total_seconds(times,seconds):

    BSSI_to_return = {}

    for i in range(0,seconds*times):
        time_to_sleep = float(1.0/times)
        time.sleep(time_to_sleep)
        got_bssi_temp = get_BSSI()

        for bssi in got_bssi_temp:
            if not BSSI_to_return.get(bssi):
                BSSI_to_return[bssi] = MAC_BSSID_POWER(bssi,got_bssi_temp[bssi][0])
                BSSI_to_return[bssi].addPower( got_bssi_temp[bssi][1] )

                #BSSI_to_return[bssi] = [got_bssi_temp[bssi][1]]

            else:
                BSSI_to_return[bssi].addPower( got_bssi_temp[bssi][1] )
                #BSSI_to_return[bssi].append(got_bssi_temp[bssi][1])
        print "Medicao "+str(i)+" de "+str(seconds*times)
    print BSSI_to_return
    return BSSI_to_return



if __name__ == '__main__':

    #print get_interface()
    import time
    test = get_BSSI()
    for i in range(0,10):
        time.sleep(0.5)
        oldTest = test
        test = get_BSSI()
        print "Teste: "+str(i)
        if oldTest == test:
            print "IGUAL"
        else:
            print "DIFERENTE"
        print test
    print "End"

InformationsquelleAutor Pedro G.

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