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
32const int PROTECT_MARK = 0x1;
33const int MAX_SYSTEM_UID = AID_APP - 1;
34
35extern const char * const IPTABLES_PATH;
36extern const char * const IP6TABLES_PATH;
37extern const char * const IP_PATH;
38extern const char * const TC_PATH;
39extern const char * const OEM_SCRIPT_PATH;
40extern const char * const ADD;
41extern const char * const DEL;
42
43enum IptablesTarget { V4, V6, V4V6 };
44
45int execIptables(IptablesTarget target, ...);
46int execIptablesSilently(IptablesTarget target, ...);
47int execIptablesRestore(IptablesTarget target, const std::string& commands);
48bool isIfaceName(const char *name);
49int parsePrefix(const char *prefix, uint8_t *family, void *address, int size, uint8_t *prefixlen);
50
51#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
52
53#define __INT_STRLEN(i) sizeof(#i)
54#define _INT_STRLEN(i) __INT_STRLEN(i)
55#define INT32_STRLEN _INT_STRLEN(INT32_MIN)
56#define UINT32_STRLEN _INT_STRLEN(UINT32_MAX)
57#define UINT32_HEX_STRLEN sizeof("0x12345678")
58
59#define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
60
61const uid_t INVALID_UID = static_cast<uid_t>(-1);
62
63
64struct AddrinfoDeleter {
65    void operator()(struct addrinfo* p) const {
66        if (p != nullptr) {
67            freeaddrinfo(p);
68        }
69    }
70};
71
72typedef std::unique_ptr<struct addrinfo, struct AddrinfoDeleter> ScopedAddrinfo;
73
74
75struct IfaddrsDeleter {
76    void operator()(struct ifaddrs *p) const {
77        if (p != nullptr) {
78            freeifaddrs(p);
79        }
80    }
81};
82
83typedef std::unique_ptr<struct ifaddrs, struct IfaddrsDeleter> ScopedIfaddrs;
84
85namespace android {
86namespace net {
87
88/**
89 * This lock exists to make NetdNativeService RPCs (which come in on multiple Binder threads)
90 * coexist with the commands in CommandListener.cpp. These are presumed not thread-safe because
91 * CommandListener has only one user (NetworkManagementService), which is connected through a
92 * FrameworkListener that passes in commands one at a time.
93 */
94extern android::RWLock gBigNetdLock;
95
96}  // namespace net
97}  // namespace android
98
99#endif  // _NETD_CONSTANTS_H
100