1 // 2 // ip/impl/address_v6.ipp 3 // ~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef ASIO_IP_IMPL_ADDRESS_V6_IPP 12 #define ASIO_IP_IMPL_ADDRESS_V6_IPP 13 14 15 #include "asio/detail/config.hpp" 16 #include <cstring> 17 #include <stdexcept> 18 #include <typeinfo> 19 #include "asio/detail/socket_ops.hpp" 20 #include "asio/detail/throw_error.hpp" 21 #include "asio/detail/throw_exception.hpp" 22 #include "asio/error.hpp" 23 #include "asio/ip/address_v6.hpp" 24 25 #include "asio/detail/push_options.hpp" 26 27 namespace asio { 28 namespace ip { 29 30 address_v6::address_v6() 31 : addr_(), 32 scope_id_(0) 33 { 34 } 35 36 address_v6::address_v6(const address_v6::bytes_type& bytes, 37 unsigned long scope) 38 : scope_id_(scope) 39 { 40 #if UCHAR_MAX > 0xFF 41 for (std::size_t i = 0; i < bytes.size(); ++i) 42 { 43 if (bytes[i] > 0xFF) 44 { 45 std::out_of_range ex("address_v6 from bytes_type"); 46 asio::detail::throw_exception(ex); 47 } 48 } 49 #endif // UCHAR_MAX > 0xFF 50 51 using namespace std; // For memcpy. 52 memcpy(addr_.s6_addr, bytes.data(), 16); 53 } 54 55 address_v6::address_v6(const address_v6& other) 56 : addr_(other.addr_), 57 scope_id_(other.scope_id_) 58 { 59 } 60 61 address_v6::address_v6(address_v6&& other) 62 : addr_(other.addr_), 63 scope_id_(other.scope_id_) 64 { 65 } 66 67 address_v6& address_v6::operator=(const address_v6& other) 68 { 69 addr_ = other.addr_; 70 scope_id_ = other.scope_id_; 71 return *this; 72 } 73 74 address_v6& address_v6::operator=(address_v6&& other) 75 { 76 addr_ = other.addr_; 77 scope_id_ = other.scope_id_; 78 return *this; 79 } 80 81 address_v6::bytes_type address_v6::to_bytes() const 82 { 83 using namespace std; // For memcpy. 84 bytes_type bytes; 85 memcpy(bytes.data(), addr_.s6_addr, 16); 86 return bytes; 87 } 88 89 std::string address_v6::to_string() const 90 { 91 asio::error_code ec; 92 std::string addr = to_string(ec); 93 asio::detail::throw_error(ec); 94 return addr; 95 } 96 97 std::string address_v6::to_string(asio::error_code& ec) const 98 { 99 char addr_str[asio::detail::max_addr_v6_str_len]; 100 const char* addr = 101 asio::detail::socket_ops::inet_ntop( 102 ASIO_OS_DEF(AF_INET6), &addr_, addr_str, 103 asio::detail::max_addr_v6_str_len, scope_id_, ec); 104 if (addr == 0) 105 return std::string(); 106 return addr; 107 } 108 109 address_v6 address_v6::from_string(const char* str) 110 { 111 asio::error_code ec; 112 address_v6 addr = from_string(str, ec); 113 asio::detail::throw_error(ec); 114 return addr; 115 } 116 117 address_v6 address_v6::from_string( 118 const char* str, asio::error_code& ec) 119 { 120 address_v6 tmp; 121 if (asio::detail::socket_ops::inet_pton( 122 ASIO_OS_DEF(AF_INET6), str, &tmp.addr_, &tmp.scope_id_, ec) <= 0) 123 return address_v6(); 124 return tmp; 125 } 126 127 address_v6 address_v6::from_string(const std::string& str) 128 { 129 return from_string(str.c_str()); 130 } 131 132 address_v6 address_v6::from_string( 133 const std::string& str, asio::error_code& ec) 134 { 135 return from_string(str.c_str(), ec); 136 } 137 138 address_v4 address_v6::to_v4() const 139 { 140 if (!is_v4_mapped() && !is_v4_compatible()) 141 { 142 std::bad_cast ex; 143 asio::detail::throw_exception(ex); 144 } 145 146 address_v4::bytes_type v4_bytes = { { addr_.s6_addr[12], 147 addr_.s6_addr[13], addr_.s6_addr[14], addr_.s6_addr[15] } }; 148 return address_v4(v4_bytes); 149 } 150 151 bool address_v6::is_loopback() const 152 { 153 return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0) 154 && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0) 155 && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0) 156 && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0) 157 && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0) 158 && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0) 159 && (addr_.s6_addr[12] == 0) && (addr_.s6_addr[13] == 0) 160 && (addr_.s6_addr[14] == 0) && (addr_.s6_addr[15] == 1)); 161 } 162 163 bool address_v6::is_unspecified() const 164 { 165 return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0) 166 && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0) 167 && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0) 168 && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0) 169 && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0) 170 && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0) 171 && (addr_.s6_addr[12] == 0) && (addr_.s6_addr[13] == 0) 172 && (addr_.s6_addr[14] == 0) && (addr_.s6_addr[15] == 0)); 173 } 174 175 bool address_v6::is_link_local() const 176 { 177 return ((addr_.s6_addr[0] == 0xfe) && ((addr_.s6_addr[1] & 0xc0) == 0x80)); 178 } 179 180 bool address_v6::is_site_local() const 181 { 182 return ((addr_.s6_addr[0] == 0xfe) && ((addr_.s6_addr[1] & 0xc0) == 0xc0)); 183 } 184 185 bool address_v6::is_v4_mapped() const 186 { 187 return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0) 188 && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0) 189 && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0) 190 && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0) 191 && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0) 192 && (addr_.s6_addr[10] == 0xff) && (addr_.s6_addr[11] == 0xff)); 193 } 194 195 bool address_v6::is_v4_compatible() const 196 { 197 return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0) 198 && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0) 199 && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0) 200 && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0) 201 && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0) 202 && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0) 203 && !((addr_.s6_addr[12] == 0) 204 && (addr_.s6_addr[13] == 0) 205 && (addr_.s6_addr[14] == 0) 206 && ((addr_.s6_addr[15] == 0) || (addr_.s6_addr[15] == 1)))); 207 } 208 209 bool address_v6::is_multicast() const 210 { 211 return (addr_.s6_addr[0] == 0xff); 212 } 213 214 bool address_v6::is_multicast_global() const 215 { 216 return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x0e)); 217 } 218 219 bool address_v6::is_multicast_link_local() const 220 { 221 return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x02)); 222 } 223 224 bool address_v6::is_multicast_node_local() const 225 { 226 return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x01)); 227 } 228 229 bool address_v6::is_multicast_org_local() const 230 { 231 return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x08)); 232 } 233 234 bool address_v6::is_multicast_site_local() const 235 { 236 return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x05)); 237 } 238 239 bool operator==(const address_v6& a1, const address_v6& a2) 240 { 241 using namespace std; // For memcmp. 242 return memcmp(&a1.addr_, &a2.addr_, 243 sizeof(asio::detail::in6_addr_type)) == 0 244 && a1.scope_id_ == a2.scope_id_; 245 } 246 247 bool operator<(const address_v6& a1, const address_v6& a2) 248 { 249 using namespace std; // For memcmp. 250 int memcmp_result = memcmp(&a1.addr_, &a2.addr_, 251 sizeof(asio::detail::in6_addr_type)); 252 if (memcmp_result < 0) 253 return true; 254 if (memcmp_result > 0) 255 return false; 256 return a1.scope_id_ < a2.scope_id_; 257 } 258 259 address_v6 address_v6::loopback() 260 { 261 address_v6 tmp; 262 tmp.addr_.s6_addr[15] = 1; 263 return tmp; 264 } 265 266 address_v6 address_v6::v4_mapped(const address_v4& addr) 267 { 268 address_v4::bytes_type v4_bytes = addr.to_bytes(); 269 bytes_type v6_bytes = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 270 v4_bytes[0], v4_bytes[1], v4_bytes[2], v4_bytes[3] } }; 271 return address_v6(v6_bytes); 272 } 273 274 address_v6 address_v6::v4_compatible(const address_v4& addr) 275 { 276 address_v4::bytes_type v4_bytes = addr.to_bytes(); 277 bytes_type v6_bytes = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 278 v4_bytes[0], v4_bytes[1], v4_bytes[2], v4_bytes[3] } }; 279 return address_v6(v6_bytes); 280 } 281 282 } // namespace ip 283 } // namespace asio 284 285 #include "asio/detail/pop_options.hpp" 286 287 #endif // ASIO_IP_IMPL_ADDRESS_V6_IPP 288