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authorcyberta <cyberta@riseup.net>2020-01-24 14:21:34 -0600
committercyberta <cyberta@riseup.net>2020-01-24 14:21:34 -0600
commit0fe9d37a223b388103e2924e6d1a28bcb0ae38fd (patch)
tree655c25f7cc02ac0fa374ecc8a00cab840553e3ee /app/src/main/java/se/leap/bitmaskclient/utils
parent2ff2358861bcd0c05586f972724ef76e5a67060c (diff)
rearrange firewalling code, move to separate package
Diffstat (limited to 'app/src/main/java/se/leap/bitmaskclient/utils')
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java196
1 files changed, 0 insertions, 196 deletions
diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java b/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java
deleted file mode 100644
index 26e6603a..00000000
--- a/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java
+++ /dev/null
@@ -1,196 +0,0 @@
-package se.leap.bitmaskclient.utils;
-/**
- * Copyright (c) 2019 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/>.
- */
-
-import android.content.Context;
-import android.os.AsyncTask;
-import android.util.Log;
-
-import java.lang.ref.WeakReference;
-
-import de.blinkt.openvpn.core.VpnStatus;
-
-import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd;
-
-interface FirewallCallback {
- void onFirewallStarted(boolean success);
- void onFirewallStopped(boolean success);
- void onSuRequested(boolean success);
-}
-
-
-public class FirewallHelper implements FirewallCallback {
- private static String BITMASK_CHAIN = "bitmask_fw";
- private static final String TAG = FirewallHelper.class.getSimpleName();
-
- private Context context;
-
- public FirewallHelper(Context context) {
- this.context = context;
- }
-
-
- @Override
- public void onFirewallStarted(boolean success) {
- if (success) {
- VpnStatus.logInfo("[FIREWALL] Custom rules established");
- } else {
- VpnStatus.logError("[FIREWALL] Could not establish custom rules.");
- }
- }
-
- @Override
- public void onFirewallStopped(boolean success) {
- if (success) {
- VpnStatus.logInfo("[FIREWALL] Custom rules deleted");
- } else {
- VpnStatus.logError("[FIREWALL] Could not delete custom rules");
- }
- }
-
- @Override
- public void onSuRequested(boolean success) {
- PreferenceHelper.setSuPermission(context, success);
- if (!success) {
- VpnStatus.logError("[FIREWALL] Root permission needed to execute custom firewall rules.");
- }
- }
-
-
- private static class StartFirewallTask extends AsyncTask<Void, Boolean, Boolean> {
-
- WeakReference<FirewallCallback> callbackWeakReference;
-
- StartFirewallTask(FirewallCallback callback) {
- callbackWeakReference = new WeakReference<>(callback);
- }
-
- @Override
- protected Boolean doInBackground(Void... voids) {
- StringBuilder log = new StringBuilder();
- String[] bitmaskChain = new String[]{
- "su",
- "id",
- "ip6tables --list " + BITMASK_CHAIN };
-
-
- try {
- boolean hasBitmaskChain = runBlockingCmd(bitmaskChain, log) == 0;
- boolean allowSu = log.toString().contains("uid=0");
- try {
- callbackWeakReference.get().onSuRequested(allowSu);
- Thread.sleep(1000);
- } catch (Exception e) {
- //ignore
- }
-
- boolean success;
- log = new StringBuilder();
- if (!hasBitmaskChain) {
- String[] createChainAndRules = new String[]{
- "su",
- "ip6tables --new-chain " + BITMASK_CHAIN,
- "ip6tables --insert OUTPUT --jump " + BITMASK_CHAIN,
- "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT",
- "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT"
- };
- success = runBlockingCmd(createChainAndRules, log) == 0;
- Log.d(TAG, "added " + BITMASK_CHAIN + " to ip6tables: " + success);
- Log.d(TAG, log.toString());
- return success;
- } else {
- String[] addRules = new String[] {
- "su",
- "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT",
- "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" };
- return runBlockingCmd(addRules, log) == 0;
- }
- } catch (Exception e) {
- e.printStackTrace();
- Log.e(TAG, log.toString());
- }
- return false;
- }
-
- @Override
- protected void onPostExecute(Boolean result) {
- super.onPostExecute(result);
- FirewallCallback callback = callbackWeakReference.get();
- if (callback != null) {
- callback.onFirewallStarted(result);
- }
- }
- }
-
- private static class ShutdownFirewallTask extends AsyncTask<Void, Boolean, Boolean> {
-
- WeakReference<FirewallCallback> callbackWeakReference;
-
- ShutdownFirewallTask(FirewallCallback callback) {
- callbackWeakReference = new WeakReference<>(callback);
- }
-
- @Override
- protected Boolean doInBackground(Void... voids) {
- boolean success;
- StringBuilder log = new StringBuilder();
- String[] deleteChain = new String[]{
- "su",
- "id",
- "ip6tables --delete OUTPUT --jump " + BITMASK_CHAIN,
- "ip6tables --flush " + BITMASK_CHAIN,
- "ip6tables --delete-chain " + BITMASK_CHAIN
- };
- try {
- success = runBlockingCmd(deleteChain, log) == 0;
- } catch (Exception e) {
- e.printStackTrace();
- Log.e(TAG, log.toString());
- return false;
- }
-
- try {
- boolean allowSu = log.toString().contains("uid=0");
- callbackWeakReference.get().onSuRequested(allowSu);
- } catch (Exception e) {
- //ignore
- }
- return success;
- }
-
- @Override
- protected void onPostExecute(Boolean result) {
- super.onPostExecute(result);
- FirewallCallback callback = callbackWeakReference.get();
- if (callback != null) {
- callback.onFirewallStopped(result);
- }
- }
- }
-
-
- public void startFirewall() {
- StartFirewallTask task = new StartFirewallTask(this);
- task.execute();
- }
-
- public void shutdownFirewall() {
- ShutdownFirewallTask task = new ShutdownFirewallTask(this);
- task.execute();
- }
-
-}