diff options
Diffstat (limited to 'app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownTetheringTask.java')
-rw-r--r-- | app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownTetheringTask.java | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownTetheringTask.java b/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownTetheringTask.java new file mode 100644 index 00000000..dcb3ccba --- /dev/null +++ b/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownTetheringTask.java @@ -0,0 +1,94 @@ +/** + * Copyright (c) 2020 LEAP Encryption Access Project and contributers + * + * This program 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. + * + * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. + */ +package se.leap.bitmaskclient.firewall; + +import android.os.AsyncTask; +import android.util.Log; + +import java.lang.ref.WeakReference; +import java.util.ArrayList; + +import se.leap.bitmaskclient.tethering.TetheringObservable; +import se.leap.bitmaskclient.tethering.TetheringState; + +import static se.leap.bitmaskclient.firewall.FirewallManager.BITMASK_FORWARD; +import static se.leap.bitmaskclient.firewall.FirewallManager.BITMASK_POSTROUTING; +import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd; + +public class ShutdownTetheringTask extends AsyncTask<Void, Boolean, Boolean> { + + private WeakReference<FirewallCallback> callbackWeakReference; + + ShutdownTetheringTask(FirewallCallback callback) { + callbackWeakReference = new WeakReference<>(callback); + } + + @Override + protected Boolean doInBackground(Void... args) { + TetheringState tetheringState = TetheringObservable.getInstance().getTetheringState(); + StringBuilder log = new StringBuilder(); + + String[] bitmaskChain = new String[]{ + "su", + "id", + "iptables -t filter --list " + BITMASK_FORWARD + " && iptables -t nat --list " + BITMASK_POSTROUTING }; + + try { + boolean hasBitmaskChain = runBlockingCmd(bitmaskChain, log) == 0; + boolean allowSu = log.toString().contains("uid=0"); + callbackWeakReference.get().onSuRequested(allowSu); + if (!allowSu) { + return false; + } + + log = new StringBuilder(); + + ArrayList<String> removeChains = new ArrayList<>(); + removeChains.add("su"); + removeChains.add("ip route flush table 61"); + removeChains.add("if [[ `ip rule show from " + tetheringState.lastSeenWifiAddress+ " lookup 61` ]]; " + + "then ip rule del from " + tetheringState.lastSeenWifiAddress + " lookup 61; " + + "fi"); + removeChains.add("if [[ `ip rule show from " + tetheringState.lastSeenUsbAddress+ " lookup 61` ]]; " + + "then ip rule del from " + tetheringState.lastSeenUsbAddress + " lookup 61; " + + "fi"); + if (hasBitmaskChain) { + removeChains.add("iptables -t filter --delete FORWARD --jump " + BITMASK_FORWARD); + removeChains.add("iptables -t nat --delete POSTROUTING --jump " + BITMASK_POSTROUTING); + removeChains.add("iptables -t filter --flush " + BITMASK_FORWARD); + removeChains.add("iptables -t nat --flush " + BITMASK_POSTROUTING); + removeChains.add("iptables -t filter --delete-chain " + BITMASK_FORWARD); + removeChains.add("iptables -t nat --delete-chain " + BITMASK_POSTROUTING); + } + return runBlockingCmd(removeChains.toArray(new String[0]), log) == 0; + + } catch (Exception e) { + e.printStackTrace(); + Log.e(FirewallManager.TAG, log.toString()); + } + return false; + } + + @Override + protected void onPostExecute(Boolean result) { + super.onPostExecute(result); + FirewallCallback callback = callbackWeakReference.get(); + if (callback != null) { + callback.onTetheringStarted(result); + } + } +} |