Java tutorial
/* * This file is part of the dSploit. * * Copyleft of Simone Margaritelli aka evilsocket <evilsocket@gmail.com> * * dSploit is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * dSploit is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with dSploit. If not, see <http://www.gnu.org/licenses/>. */ package org.csploit.android.net; import android.content.Context; import android.net.ConnectivityManager; import android.net.DhcpInfo; import android.net.NetworkInfo; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import org.apache.commons.net.util.SubnetUtils; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.NoRouteToHostException; import java.net.SocketException; import java.net.UnknownHostException; import org.csploit.android.core.Logger; import org.csploit.android.core.System; public class Network { public enum Protocol { TCP, UDP, ICMP, IGMP, UNKNOWN; public static Protocol fromString(String proto) { if (proto != null) { proto = proto.toLowerCase(); if (proto.equals("tcp")) return TCP; else if (proto.equals("udp")) return UDP; else if (proto.equals("icmp")) return ICMP; else if (proto.equals("igmp")) return IGMP; } return UNKNOWN; } public String toString() { switch (this) { case ICMP: return "icmp"; case IGMP: return "igmp"; case TCP: return "tcp"; case UDP: return "udp"; default: return "unknown"; } } } private ConnectivityManager mConnectivityManager = null; private WifiManager mWifiManager = null; private DhcpInfo mInfo = null; private WifiInfo mWifiInfo = null; private NetworkInterface mInterface = null; private IP4Address mGateway = null; private IP4Address mNetmask = null; private IP4Address mLocal = null; private IP4Address mBase = null; /** see http://en.wikipedia.org/wiki/Reserved_IP_addresses */ private static final String[] PRIVATE_NETWORKS = { "10.0.0.0/8", "100.64.0.0/10", "172.16.0.0/12", "192.168.0.0/16" }; public Network(Context context) throws SocketException, UnknownHostException { mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); mInfo = mWifiManager.getDhcpInfo(); mWifiInfo = mWifiManager.getConnectionInfo(); mLocal = new IP4Address(mInfo.ipAddress); mGateway = new IP4Address(mInfo.gateway); mNetmask = getNetmask(); mBase = new IP4Address(mInfo.netmask & mInfo.gateway); if (isConnected() == false) throw new NoRouteToHostException("Not connected to any WiFi access point."); else { try { mInterface = NetworkInterface.getByInetAddress(getLocalAddress()); if (mInterface == null) throw new IllegalStateException("Error retrieving network interface."); } catch (SocketException e) { System.errorLogging(e); /* * Issue #26: Initialization error in ColdFusionX ROM * * It seems it's a ROM issue which doesn't correctly populate device descriptors. * This rom maps the default wifi interface to a generic usb device * ( maybe it's missing the specific interface driver ), which is obviously not, and * it all goes shit, use an alternative method to obtain the interface object. */ mInterface = NetworkInterface.getByName(java.lang.System.getProperty("wifi.interface", "wlan0")); if (mInterface == null) throw e; } } } private IP4Address getNetmask() throws UnknownHostException { IP4Address result = new IP4Address(mInfo.netmask); if (System.getSettings().getBoolean("WIDE_SCAN", false)) { SubnetUtils privateNetwork; for (String cidr_notation : PRIVATE_NETWORKS) { privateNetwork = new SubnetUtils(cidr_notation); if (privateNetwork.getInfo().isInRange(mLocal.toString())) { result = new IP4Address(privateNetwork.getInfo().getNetmask()); break; } } } return result; } public boolean equals(Network network) { return mInfo.equals(network.getInfo()); } public boolean isInternal(byte[] address) { byte[] gateway = mGateway.toByteArray(); byte[] mask = mNetmask.toByteArray(); for (int i = 0; i < gateway.length; i++) if ((gateway[i] & mask[i]) != (address[i] & mask[i])) return false; return true; } public boolean isInternal(String ip) { try { return isInternal(InetAddress.getByName(ip).getAddress()); } catch (UnknownHostException e) { Logger.error(e.getMessage()); } return false; } public boolean isInternal(InetAddress address) { return isInternal(address.getAddress()); } public static boolean isWifiConnected(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo info = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); return info != null && info.isConnected() && info.isAvailable(); } public static boolean isConnectivityAvailable(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo info = manager.getActiveNetworkInfo(); return info != null && info.isConnected(); } public boolean isConnected() { return mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected(); } public String getSSID() { return mWifiInfo.getSSID(); } public int getNumberOfAddresses() { return IP4Address.ntohl(~mNetmask.toInteger()); } public IP4Address getStartAddress() { return mBase; } public String getNetworkMasked() { int network = mBase.toInteger(); return (network & 0xFF) + "." + ((network >> 8) & 0xFF) + "." + ((network >> 16) & 0xFF) + "." + ((network >> 24) & 0xFF); } public String getNetworkRepresentation() { return getNetworkMasked() + "/" + mNetmask.getPrefixLength(); } public DhcpInfo getInfo() { return mInfo; } public InetAddress getNetmaskAddress() { return mNetmask.toInetAddress(); } public InetAddress getGatewayAddress() { return mGateway.toInetAddress(); } public byte[] getGatewayHardware() { return Endpoint.parseMacAddress(mWifiInfo.getBSSID()); } public byte[] getLocalHardware() { try { return mInterface.getHardwareAddress(); } catch (SocketException e) { System.errorLogging(e); } return null; } public String getLocalAddressAsString() { return mLocal.toString(); } public InetAddress getLocalAddress() { return mLocal.toInetAddress(); } public NetworkInterface getInterface() { return mInterface; } }