| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef _FIREWALL_CONTROLLER_H |
| #define _FIREWALL_CONTROLLER_H |
| |
| #include <string> |
| |
| enum FirewallRule { DENY, ALLOW }; |
| |
| // WHITELIST means the firewall denies all by default, uids must be explicitly ALLOWed |
| // BLACKLIST means the firewall allows all by default, uids must be explicitly DENYed |
| |
| enum FirewallType { WHITELIST, BLACKLIST }; |
| |
| enum ChildChain { NONE, DOZABLE, STANDBY, INVALID_CHAIN }; |
| |
| #define PROTOCOL_TCP 6 |
| #define PROTOCOL_UDP 17 |
| |
| /* |
| * Simple firewall that drops all packets except those matching explicitly |
| * defined ALLOW rules. |
| */ |
| class FirewallController { |
| public: |
| FirewallController(); |
| |
| int setupIptablesHooks(void); |
| |
| int enableFirewall(FirewallType); |
| int disableFirewall(void); |
| int isFirewallEnabled(void); |
| |
| /* Match traffic going in/out over the given iface. */ |
| int setInterfaceRule(const char*, FirewallRule); |
| /* Match traffic coming-in-to or going-out-from given address. */ |
| int setEgressSourceRule(const char*, FirewallRule); |
| /* Match traffic coming-in-from or going-out-to given address, port, and protocol. */ |
| int setEgressDestRule(const char*, int, int, FirewallRule); |
| /* Match traffic owned by given UID. This is specific to a particular chain. */ |
| int setUidRule(ChildChain, int, FirewallRule); |
| |
| int enableChildChains(ChildChain, bool); |
| |
| static const char* TABLE; |
| |
| static const char* LOCAL_INPUT; |
| static const char* LOCAL_OUTPUT; |
| static const char* LOCAL_FORWARD; |
| |
| static const char* LOCAL_DOZABLE; |
| static const char* LOCAL_STANDBY; |
| private: |
| FirewallType mFirewallType; |
| int attachChain(const char*, const char*); |
| int detachChain(const char*, const char*); |
| int createChain(const char*, const char*, FirewallType); |
| FirewallType getFirewallType(ChildChain); |
| }; |
| |
| #endif |