blob: 6d6f48fad8dd106026b3265b8f7377c655083e18 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* 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
|
