1 /* 2 * libjingle 3 * Copyright 2011, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_IPADDRESS_H_ 29 #define TALK_BASE_IPADDRESS_H_ 30 31 #ifdef POSIX 32 #include <netinet/in.h> 33 #include <sys/socket.h> 34 #include <arpa/inet.h> 35 #include <netdb.h> 36 #endif 37 #ifdef WIN32 38 #include <winsock2.h> 39 #include <ws2tcpip.h> 40 #endif 41 #include <string.h> 42 #include <string> 43 #include <vector> 44 45 #include "talk/base/basictypes.h" 46 #include "talk/base/byteorder.h" 47 #ifdef WIN32 48 #include "talk/base/win32.h" 49 #endif 50 51 namespace talk_base { 52 53 // Version-agnostic IP address class, wraps a union of in_addr and in6_addr. 54 class IPAddress { 55 public: 56 IPAddress() : family_(AF_UNSPEC) { 57 ::memset(&u_, 0, sizeof(u_)); 58 } 59 60 explicit IPAddress(const in_addr &ip4) : family_(AF_INET) { 61 memset(&u_, 0, sizeof(u_)); 62 u_.ip4 = ip4; 63 } 64 65 explicit IPAddress(const in6_addr &ip6) : family_(AF_INET6) { 66 u_.ip6 = ip6; 67 } 68 69 explicit IPAddress(uint32 ip_in_host_byte_order) : family_(AF_INET) { 70 memset(&u_, 0, sizeof(u_)); 71 u_.ip4.s_addr = HostToNetwork32(ip_in_host_byte_order); 72 } 73 74 IPAddress(const IPAddress &other) : family_(other.family_) { 75 ::memcpy(&u_, &other.u_, sizeof(u_)); 76 } 77 78 ~IPAddress() {} 79 80 const IPAddress & operator=(const IPAddress &other) { 81 family_ = other.family_; 82 ::memcpy(&u_, &other.u_, sizeof(u_)); 83 return *this; 84 } 85 86 bool operator==(const IPAddress &other) const; 87 bool operator!=(const IPAddress &other) const; 88 bool operator <(const IPAddress &other) const; 89 bool operator >(const IPAddress &other) const; 90 friend std::ostream& operator<<(std::ostream& os, const IPAddress& addr); 91 92 int family() const { return family_; } 93 in_addr ipv4_address() const; 94 in6_addr ipv6_address() const; 95 96 // Returns the number of bytes needed to store the raw address. 97 size_t Size() const; 98 99 // Wraps inet_ntop. 100 std::string ToString() const; 101 102 // Same as ToString but anonymizes it by hiding the last part. 103 std::string ToSensitiveString() const; 104 105 // Returns an unmapped address from a possibly-mapped address. 106 // Returns the same address if this isn't a mapped address. 107 IPAddress Normalized() const; 108 109 // Returns this address as an IPv6 address. 110 // Maps v4 addresses (as ::ffff:a.b.c.d), returns v6 addresses unchanged. 111 IPAddress AsIPv6Address() const; 112 113 // For socketaddress' benefit. Returns the IP in host byte order. 114 uint32 v4AddressAsHostOrderInteger() const; 115 116 static void set_strip_sensitive(bool enable); 117 118 private: 119 int family_; 120 union { 121 in_addr ip4; 122 in6_addr ip6; 123 } u_; 124 125 static bool strip_sensitive_; 126 }; 127 128 bool IPFromAddrInfo(struct addrinfo* info, IPAddress* out); 129 bool IPFromString(const std::string& str, IPAddress* out); 130 bool IPIsAny(const IPAddress& ip); 131 bool IPIsLoopback(const IPAddress& ip); 132 bool IPIsPrivate(const IPAddress& ip); 133 bool IPIsUnspec(const IPAddress& ip); 134 size_t HashIP(const IPAddress& ip); 135 136 // These are only really applicable for IPv6 addresses. 137 bool IPIs6Bone(const IPAddress& ip); 138 bool IPIs6To4(const IPAddress& ip); 139 bool IPIsSiteLocal(const IPAddress& ip); 140 bool IPIsTeredo(const IPAddress& ip); 141 bool IPIsULA(const IPAddress& ip); 142 bool IPIsV4Compatibility(const IPAddress& ip); 143 bool IPIsV4Mapped(const IPAddress& ip); 144 145 // Returns the precedence value for this IP as given in RFC3484. 146 int IPAddressPrecedence(const IPAddress& ip); 147 148 // Returns 'ip' truncated to be 'length' bits long. 149 IPAddress TruncateIP(const IPAddress& ip, int length); 150 151 // Returns the number of contiguously set bits, counting from the MSB in network 152 // byte order, in this IPAddress. Bits after the first 0 encountered are not 153 // counted. 154 int CountIPMaskBits(IPAddress mask); 155 156 } // namespace talk_base 157 158 #endif // TALK_BASE_IPADDRESS_H_ 159
