[英]Gettind a device MAC address by IP
Well, in my app I use some code to discover all reachable devices in Local Network.好吧,在我的应用程序中,我使用一些代码来发现本地网络中所有可访问的设备。 Now I want to get device's mac address using local ip address现在我想使用本地 IP 地址获取设备的 mac 地址
I want something like this: getMacAddress("192.168.1.23")
我想要这样的东西: getMacAddress("192.168.1.23")
public static String getMacAddress(String ip)
{
String macAddress = ...
return macAddress;
}
I have found this for getting my own mac address, what about the rest of the ips in the LAN?我发现这个是为了获取我自己的 mac 地址,那么 LAN 中的其余 ips 呢?
WifiManager manager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo info = manager.getConnectionInfo();
String address = info.getMacAddress();
/proc/net/arp
is the local ARP
cache, which at least has cached entries (which may be offline). /proc/net/arp
是本地ARP
缓存,它至少有缓存的条目(可能是离线的)。
protected String getMacAddress(String ipAddress) {
try {
BufferedReader br = new BufferedReader(new FileReader(new File("/proc/net/arp")));
String line;
while((line = br.readLine()) != null) {
if(line.contains(ipAddress)) {
/* this string still would need to be sanitized */
return line;
}
}
System.out.println(output);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
alternatively, one could scan the whole local network segment -或者,可以扫描整个本地网段 -
or retrieve the ARP
cache from a local network router.或从本地网络路由器检索ARP
缓存。
Ref: How can I get the number of devices connected through the phones access-point? Ref: 如何获取通过手机接入点连接的设备数量?
you can count connected devices on access point and it's get hardware mac address on below link on android: http://www.flattermann.net/2011/02/android-howto-find-the-hardware-mac-address-of-a-remote-host/您可以计算接入点上连接的设备,并在以下 android 链接上获取硬件 mac 地址: http : //www.flattermann.net/2011/02/android-howto-find-the-hardware-mac-address-of-远程主机/
code from above link:上面链接中的代码:
/**
* Try to extract a hardware MAC address from a given IP address using the
* ARP cache (/proc/net/arp).<br>
* <br>
* We assume that the file has this structure:<br>
* <br>
* IP address HW type Flags HW address Mask Device
* 192.168.18.11 0x1 0x2 00:04:20:06:55:1a * eth0
* 192.168.18.36 0x1 0x2 00:22:43:ab:2a:5b * eth0
*
* @param ip
* @return the MAC from the ARP cache
*/
public static String getMacFromArpCache(String ip) {
if (ip == null)
return null;
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader("/proc/net/arp"));
String line;
while ((line = br.readLine()) != null) {
String[] splitted = line.split(" +");
if (splitted != null && splitted.length >= 4 && ip.equals(splitted[0])) {
// Basic sanity check
String mac = splitted[3];
if (mac.matches("..:..:..:..:..:..")) {
return mac;
} else {
return null;
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
or if u have problem on code try below code:或者如果您在代码上遇到问题,请尝试以下代码:
public ArrayList<InetAddress> getConnectedDevices(String YourPhoneIPAddress) {
ArrayList<InetAddress> ret = new ArrayList<InetAddress>();
LoopCurrentIP = 0;
String IPAddress = "";
String[] myIPArray = YourPhoneIPAddress.split("\\.");
InetAddress currentPingAddr;
for (int i = 0; i <= 255; i++) {
try {
// build the next IP address
currentPingAddr = InetAddress.getByName(myIPArray[0] + "." +
myIPArray[1] + "." +
myIPArray[2] + "." +
Integer.toString(LoopCurrentIP));
ad = currentPingAddr.toString(); /////////////////
Log.d("MyApp",ad); //////////////
// 50ms Timeout for the "ping"
if (currentPingAddr.isReachable(50)) {
ret.add(currentPingAddr);
ad = currentPingAddr.toString(); /////////////////
Log.d("MyApp",ad); //////////////
}
} catch (UnknownHostException ex) {
} catch (IOException ex) {
}
LoopCurrentIP++;
}
return ret;
}
That function works only to get your own MAC, and even then it has severe limitations on modern Android.该功能仅适用于获取您自己的 MAC,即使如此,它对现代 Android 也有严重的限制。 What you want isn't a feature of Android.您想要的不是 Android 的功能。
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