henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2011 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef WEBRTC_BASE_IPADDRESS_H_ |
| 12 | #define WEBRTC_BASE_IPADDRESS_H_ |
| 13 | |
| 14 | #if defined(WEBRTC_POSIX) |
| 15 | #include <netinet/in.h> |
| 16 | #include <sys/socket.h> |
| 17 | #include <arpa/inet.h> |
| 18 | #include <netdb.h> |
| 19 | #endif |
| 20 | #if defined(WEBRTC_WIN) |
| 21 | #include <winsock2.h> |
| 22 | #include <ws2tcpip.h> |
| 23 | #endif |
| 24 | #include <string.h> |
| 25 | #include <string> |
| 26 | #include <vector> |
| 27 | |
| 28 | #include "webrtc/base/basictypes.h" |
| 29 | #include "webrtc/base/byteorder.h" |
| 30 | #if defined(WEBRTC_WIN) |
| 31 | #include "webrtc/base/win32.h" |
| 32 | #endif |
| 33 | |
| 34 | namespace rtc { |
| 35 | |
| 36 | // Version-agnostic IP address class, wraps a union of in_addr and in6_addr. |
| 37 | class IPAddress { |
| 38 | public: |
| 39 | IPAddress() : family_(AF_UNSPEC) { |
| 40 | ::memset(&u_, 0, sizeof(u_)); |
| 41 | } |
| 42 | |
| 43 | explicit IPAddress(const in_addr &ip4) : family_(AF_INET) { |
| 44 | memset(&u_, 0, sizeof(u_)); |
| 45 | u_.ip4 = ip4; |
| 46 | } |
| 47 | |
| 48 | explicit IPAddress(const in6_addr &ip6) : family_(AF_INET6) { |
| 49 | u_.ip6 = ip6; |
| 50 | } |
| 51 | |
| 52 | explicit IPAddress(uint32 ip_in_host_byte_order) : family_(AF_INET) { |
| 53 | memset(&u_, 0, sizeof(u_)); |
| 54 | u_.ip4.s_addr = HostToNetwork32(ip_in_host_byte_order); |
| 55 | } |
| 56 | |
| 57 | IPAddress(const IPAddress &other) : family_(other.family_) { |
| 58 | ::memcpy(&u_, &other.u_, sizeof(u_)); |
| 59 | } |
| 60 | |
| 61 | ~IPAddress() {} |
| 62 | |
| 63 | const IPAddress & operator=(const IPAddress &other) { |
| 64 | family_ = other.family_; |
| 65 | ::memcpy(&u_, &other.u_, sizeof(u_)); |
| 66 | return *this; |
| 67 | } |
| 68 | |
| 69 | bool operator==(const IPAddress &other) const; |
| 70 | bool operator!=(const IPAddress &other) const; |
| 71 | bool operator <(const IPAddress &other) const; |
| 72 | bool operator >(const IPAddress &other) const; |
| 73 | friend std::ostream& operator<<(std::ostream& os, const IPAddress& addr); |
| 74 | |
| 75 | int family() const { return family_; } |
| 76 | in_addr ipv4_address() const; |
| 77 | in6_addr ipv6_address() const; |
| 78 | |
| 79 | // Returns the number of bytes needed to store the raw address. |
| 80 | size_t Size() const; |
| 81 | |
| 82 | // Wraps inet_ntop. |
| 83 | std::string ToString() const; |
| 84 | |
| 85 | // Same as ToString but anonymizes it by hiding the last part. |
| 86 | std::string ToSensitiveString() const; |
| 87 | |
| 88 | // Returns an unmapped address from a possibly-mapped address. |
| 89 | // Returns the same address if this isn't a mapped address. |
| 90 | IPAddress Normalized() const; |
| 91 | |
| 92 | // Returns this address as an IPv6 address. |
| 93 | // Maps v4 addresses (as ::ffff:a.b.c.d), returns v6 addresses unchanged. |
| 94 | IPAddress AsIPv6Address() const; |
| 95 | |
| 96 | // For socketaddress' benefit. Returns the IP in host byte order. |
| 97 | uint32 v4AddressAsHostOrderInteger() const; |
| 98 | |
| 99 | static void set_strip_sensitive(bool enable); |
| 100 | |
| 101 | private: |
| 102 | int family_; |
| 103 | union { |
| 104 | in_addr ip4; |
| 105 | in6_addr ip6; |
| 106 | } u_; |
| 107 | |
| 108 | static bool strip_sensitive_; |
| 109 | }; |
| 110 | |
| 111 | bool IPFromAddrInfo(struct addrinfo* info, IPAddress* out); |
| 112 | bool IPFromString(const std::string& str, IPAddress* out); |
| 113 | bool IPIsAny(const IPAddress& ip); |
| 114 | bool IPIsLoopback(const IPAddress& ip); |
| 115 | bool IPIsPrivate(const IPAddress& ip); |
| 116 | bool IPIsUnspec(const IPAddress& ip); |
| 117 | size_t HashIP(const IPAddress& ip); |
| 118 | |
| 119 | // These are only really applicable for IPv6 addresses. |
| 120 | bool IPIs6Bone(const IPAddress& ip); |
| 121 | bool IPIs6To4(const IPAddress& ip); |
| 122 | bool IPIsSiteLocal(const IPAddress& ip); |
| 123 | bool IPIsTeredo(const IPAddress& ip); |
| 124 | bool IPIsULA(const IPAddress& ip); |
| 125 | bool IPIsV4Compatibility(const IPAddress& ip); |
| 126 | bool IPIsV4Mapped(const IPAddress& ip); |
| 127 | |
| 128 | // Returns the precedence value for this IP as given in RFC3484. |
| 129 | int IPAddressPrecedence(const IPAddress& ip); |
| 130 | |
| 131 | // Returns 'ip' truncated to be 'length' bits long. |
| 132 | IPAddress TruncateIP(const IPAddress& ip, int length); |
| 133 | |
| 134 | // Returns the number of contiguously set bits, counting from the MSB in network |
| 135 | // byte order, in this IPAddress. Bits after the first 0 encountered are not |
| 136 | // counted. |
| 137 | int CountIPMaskBits(IPAddress mask); |
| 138 | |
| 139 | } // namespace rtc |
| 140 | |
| 141 | #endif // WEBRTC_BASE_IPADDRESS_H_ |