1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _NETD_CONSTANTS_H
18 #define _NETD_CONSTANTS_H
19 
20 #include <string>
21 #include <list>
22 #include <ifaddrs.h>
23 #include <netdb.h>
24 #include <stdarg.h>
25 
26 #include <chrono>
27 
28 #include <private/android_filesystem_config.h>
29 
30 #include "utils/RWLock.h"
31 
32 const int PROTECT_MARK = 0x1;
33 const int MAX_SYSTEM_UID = AID_APP - 1;
34 
35 extern const size_t SHA256_SIZE;
36 
37 extern const char * const OEM_SCRIPT_PATH;
38 extern const char * const ADD;
39 extern const char * const DEL;
40 
41 enum IptablesTarget { V4, V6, V4V6 };
42 
43 int execIptablesRestore(IptablesTarget target, const std::string& commands);
44 int execIptablesRestoreWithOutput(IptablesTarget target, const std::string& commands,
45                                   std::string *output);
46 int execIptablesRestoreCommand(IptablesTarget target, const std::string& table,
47                                const std::string& command, std::string *output);
48 bool isIfaceName(const std::string& name);
49 int parsePrefix(const char *prefix, uint8_t *family, void *address, int size, uint8_t *prefixlen);
50 void blockSigpipe();
51 void setCloseOnExec(const char *sock);
52 
53 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
54 
55 #define __INT_STRLEN(i) sizeof(#i)
56 #define _INT_STRLEN(i) __INT_STRLEN(i)
57 #define INT32_STRLEN _INT_STRLEN(INT32_MIN)
58 #define UINT32_STRLEN _INT_STRLEN(UINT32_MAX)
59 #define UINT32_HEX_STRLEN sizeof("0x12345678")
60 #define IPSEC_IFACE_PREFIX "ipsec"
61 
62 #define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
63 
64 const uid_t INVALID_UID = static_cast<uid_t>(-1);
65 
66 
67 struct AddrinfoDeleter {
operatorAddrinfoDeleter68     void operator()(struct addrinfo* p) const {
69         if (p != nullptr) {
70             freeaddrinfo(p);
71         }
72     }
73 };
74 
75 typedef std::unique_ptr<struct addrinfo, struct AddrinfoDeleter> ScopedAddrinfo;
76 
77 
78 struct IfaddrsDeleter {
operatorIfaddrsDeleter79     void operator()(struct ifaddrs *p) const {
80         if (p != nullptr) {
81             freeifaddrs(p);
82         }
83     }
84 };
85 
86 typedef std::unique_ptr<struct ifaddrs, struct IfaddrsDeleter> ScopedIfaddrs;
87 
88 namespace android {
89 namespace net {
90 
91 /**
92  * This lock exists to make NetdNativeService RPCs (which come in on multiple Binder threads)
93  * coexist with the commands in CommandListener.cpp. These are presumed not thread-safe because
94  * CommandListener has only one user (NetworkManagementService), which is connected through a
95  * FrameworkListener that passes in commands one at a time.
96  */
97 extern android::RWLock gBigNetdLock;
98 
99 }  // namespace net
100 }  // namespace android
101 
102 #endif  // _NETD_CONSTANTS_H
103