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Questions tagged [network-scan]

Network scanning is a procedure for identifying active hosts on a network or active services on those hosts.

Network scanning is a procedure for identifying active hosts on a network, and the services running on those hosts. This can either be for the purpose of finding hosts, connecting to a service or network security assessment. Scanning procedures, such as ping sweeps and port scans, return information about which IP addresses map to live hosts that are active on the Internet and what services they offer. This tag covers all kind of network scans over all interfaces such as ethernet, Wi-Fi and Bluetooth.

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android BluetoothDevice.getName() return null

On sometime, BluetoothDevice.getName() return null. How can i fix it? remoteDeviceName maybe null in following code. And i need distinguish my device and other devices by remoteDeviceName. BluetoothAdapter.getDefaultAdapter().startLeScan(new…
maonanyue
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Android BLE Passive scan

I want to scan BLE advertisers passively within my Android App. But I couldn't found how to do this. According Bluetooth 4.0 Core spec, There exists passive scan mode. Vol 6 : Core System Package [Low Energy Controller volume], Part D:4.1 PASSIVE…
Stanley Ko
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Find all IP addresses in local network

I want to find all IP addresses of devices in the local network I'm currently connected to using Java code. The useful utility Advanced IP Scanner is able to find various IP addresses in my subnet of 192.168.178/24: According to this answer, I…
BullyWiiPlaza
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Get BLE Scan without filter duplicate UUID

I'm writing an BLE application, where need to track if peripherals device is advertising or has stop. I followed getting peripherals without duplications this and BLE Filtering behaviour of startLeScan() and I completely agree over here. To make it…
CoDe
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iOS BLE background scanning

I'm having some trouble understanding how scanning is performed when an iOS application is in bacground. I have a very simple test application which just scans for devices and outputs the results to the console. I've added bluetooth-central to…
P_B
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Scan and connect to Wifi networks using Java

Need to write a client, which can scan the available WIFI networks and connects to best known using Java. This might be desktop client which does this job. Any pointers would be helpful and appreciate your response.
user1686758
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Android listing BLE devices after device scan

Can u provide me the simple code for scanning the nearby BLE devices and list it by device name and MAC ID. I tried this using sample code provided in http://developer.android.com/guide/topics/connectivity/bluetooth-le.html. But didn't work, any…
info
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Android - How to scan Access Points and select strongest signal?

I am currently trying to write a class in Android that will Scan for access points, calculate which access point has the best signal and then connect to that access point. So the application will be able to scan on the move and attach to new access…
Donal Rafferty
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What methods, other than listening for Probe Requests, can be used to find 802.11 wifi devices?

I'm writing a Python module for finding nearby WiFi client devices. All my current scanner does is listen for Probe Requests and logs the clients MAC address. The problem I'm having is that I'm completely reliant on the device broadcasting a probe…
dave
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quicker WiFi scan rate to obtain rssi changes android

I am trying to increase the wifi scan rate but with the method wifi.startscan and getting the info of the list result returned, i dont see that the rssi change each 2 seconds. My question is if it is possible to get a low rate scan of the rssi and…
user1826177
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network manager not listing wifi

I use NetworkManager command tool to scan for wireless networks is empty. root@radxa:~# nmcli dev wifi list SSID BSSID MODE FREQ RATE SIGNAL SECURITY ACTIVE root@radxa:~# but is use iwlist scan is ok. root@radxa:~# iwlist wlan0…
guanghai lu
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List / Scan for available WiFis iPhone

I'm searching for a way to present available WiFis in an iPhone App. So far my research resulted in the following: Apps that implement(ed) such a functionality were removed from the AppStore (means you can't deploy the App via AppStore which is…
m Jae
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Do Android devices scan *actively* for WiFi networks?

i am programming for google android and i wonder if the scans for wireless 802.11 networks are done passively or actively? i mean: does the device actually emit a beacon request signal on WifiManager.startScan() or does it just listen for beacons…
xenonite
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Scanresult is always empty on Android 6.0

I have migrated my app to Android 6.0. But from in this migration, Wifi Scanresult is always empty. In some articles, I saw it's related new permission policy for location. So, I added use-permission ACCESS_COARSE_LOCATION and ACCESS_FINE_LOCATION…
jimmy
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Wi-Fi scanning without broadcast receiver?

I have created wi-fi scanner. It continually scans for available wi-fi networks. But my question is why would exactly broadcast receiver is needed if i can actually run scanning (invoke startScan() with timer every x seconds) and receive the same…
Artur
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