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 char * const IPTABLES_PATH; 36 extern const char * const IP6TABLES_PATH; 37 extern const char * const IP_PATH; 38 extern const char * const TC_PATH; 39 extern const char * const OEM_SCRIPT_PATH; 40 extern const char * const ADD; 41 extern const char * const DEL; 42 43 enum IptablesTarget { V4, V6, V4V6 }; 44 45 int execIptables(IptablesTarget target, ...); 46 int execIptablesSilently(IptablesTarget target, ...); 47 int execIptablesRestore(IptablesTarget target, const std::string& commands); 48 bool isIfaceName(const char *name); 49 int 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 61 const uid_t INVALID_UID = static_cast<uid_t>(-1); 62 63 class Stopwatch { 64 public: Stopwatch()65 Stopwatch() : mStart(std::chrono::steady_clock::now()) {} ~Stopwatch()66 virtual ~Stopwatch() {}; 67 timeTaken()68 float timeTaken() const { 69 using ms = std::chrono::duration<float, std::ratio<1, 1000>>; 70 return (std::chrono::duration_cast<ms>( 71 std::chrono::steady_clock::now() - mStart)).count(); 72 } 73 74 private: 75 std::chrono::time_point<std::chrono::steady_clock> mStart; 76 }; 77 78 79 struct AddrinfoDeleter { operatorAddrinfoDeleter80 void operator()(struct addrinfo* p) const { 81 if (p != nullptr) { 82 freeaddrinfo(p); 83 } 84 } 85 }; 86 87 typedef std::unique_ptr<struct addrinfo, struct AddrinfoDeleter> ScopedAddrinfo; 88 89 90 struct IfaddrsDeleter { operatorIfaddrsDeleter91 void operator()(struct ifaddrs *p) const { 92 if (p != nullptr) { 93 freeifaddrs(p); 94 } 95 } 96 }; 97 98 typedef std::unique_ptr<struct ifaddrs, struct IfaddrsDeleter> ScopedIfaddrs; 99 100 namespace android { 101 namespace net { 102 103 /** 104 * This lock exists to make NetdNativeService RPCs (which come in on multiple Binder threads) 105 * coexist with the commands in CommandListener.cpp. These are presumed not thread-safe because 106 * CommandListener has only one user (NetworkManagementService), which is connected through a 107 * FrameworkListener that passes in commands one at a time. 108 */ 109 extern android::RWLock gBigNetdLock; 110 111 } // namespace net 112 } // namespace android 113 114 #endif // _NETD_CONSTANTS_H 115