| /* |
| * 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 <sys/types.h> |
| #include <mutex> |
| #include <set> |
| #include <string> |
| #include <vector> |
| |
| #include "NetdConstants.h" |
| #include "bpf/BpfUtils.h" |
| |
| namespace android { |
| namespace net { |
| |
| /* |
| * Simple firewall that drops all packets except those matching explicitly |
| * defined ALLOW rules. |
| * |
| * Methods in this class must be called when holding a write lock on |lock|, and may not call |
| * any other controller without explicitly managing that controller's lock. There are currently |
| * no such methods. |
| */ |
| class FirewallController { |
| public: |
| FirewallController(); |
| |
| int setupIptablesHooks(void); |
| |
| int setFirewallType(FirewallType); |
| int resetFirewall(void); |
| int isFirewallEnabled(void); |
| |
| /* Match traffic going in/out over the given iface. */ |
| int setInterfaceRule(const char*, FirewallRule); |
| /* Match traffic owned by given UID. This is specific to a particular chain. */ |
| int setUidRule(ChildChain, int, FirewallRule); |
| |
| int enableChildChains(ChildChain, bool); |
| |
| static std::string makeCriticalCommands(IptablesTarget target, const char* chainName); |
| |
| static const char* TABLE; |
| |
| static const char* LOCAL_INPUT; |
| static const char* LOCAL_OUTPUT; |
| static const char* LOCAL_FORWARD; |
| |
| static const char* ICMPV6_TYPES[]; |
| |
| std::mutex lock; |
| |
| protected: |
| friend class FirewallControllerTest; |
| static int (*execIptablesRestore)(IptablesTarget target, const std::string& commands); |
| |
| private: |
| FirewallType mFirewallType; |
| std::set<std::string> mIfaceRules; |
| int flushRules(void); |
| }; |
| |
| } // namespace net |
| } // namespace android |
| |
| #endif |