83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _FIREWALL_CONTROLLER_H
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#define _FIREWALL_CONTROLLER_H
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#include <sys/types.h>
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#include <mutex>
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#include <set>
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#include <string>
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#include <vector>
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#include "NetdConstants.h"
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#include "bpf/BpfUtils.h"
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namespace android {
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namespace net {
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/*
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* Simple firewall that drops all packets except those matching explicitly
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* defined ALLOW rules.
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*
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* Methods in this class must be called when holding a write lock on |lock|, and may not call
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* any other controller without explicitly managing that controller's lock. There are currently
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* no such methods.
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*/
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class FirewallController {
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public:
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FirewallController();
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int setupIptablesHooks(void);
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int setFirewallType(FirewallType);
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int resetFirewall(void);
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int isFirewallEnabled(void);
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/* Match traffic going in/out over the given iface. */
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int setInterfaceRule(const char*, FirewallRule);
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/* Match traffic owned by given UID. This is specific to a particular chain. */
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int setUidRule(ChildChain, int, FirewallRule);
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int enableChildChains(ChildChain, bool);
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static std::string makeCriticalCommands(IptablesTarget target, const char* chainName);
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static const char* TABLE;
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static const char* LOCAL_INPUT;
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static const char* LOCAL_OUTPUT;
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static const char* LOCAL_FORWARD;
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static const char* ICMPV6_TYPES[];
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std::mutex lock;
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protected:
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friend class FirewallControllerTest;
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static int (*execIptablesRestore)(IptablesTarget target, const std::string& commands);
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private:
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FirewallType mFirewallType;
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std::set<std::string> mIfaceRules;
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int flushRules(void);
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};
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} // namespace net
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} // namespace android
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#endif
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