ceph/src/boost/boost/asio/ip/detail/socket_option.hpp

   1 //
   2 // detail/socket_option.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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 BOOST_ASIO_IP_DETAIL_SOCKET_OPTION_HPP
  12 #define BOOST_ASIO_IP_DETAIL_SOCKET_OPTION_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19 #include <cstddef>
  20 #include <cstring>
  21 #include <stdexcept>
  22 #include <boost/asio/detail/socket_ops.hpp>
  23 #include <boost/asio/detail/socket_types.hpp>
  24 #include <boost/asio/detail/throw_exception.hpp>
  25 #include <boost/asio/ip/address.hpp>
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28
  29 namespace boost {
  30 namespace asio {
  31 namespace ip {
  32 namespace detail {
  33 namespace socket_option {
  34
  35 // Helper template for implementing multicast enable loopback options.
  36 template <int IPv4_Level, int IPv4_Name, int IPv6_Level, int IPv6_Name>
  37 class multicast_enable_loopback
  38 {
  39 public:
  40 #if defined(__sun) || defined(__osf__)
  41   typedef unsigned char ipv4_value_type;
  42   typedef unsigned char ipv6_value_type;
  43 #elif defined(_AIX) || defined(__hpux) || defined(__QNXNTO__)
  44   typedef unsigned char ipv4_value_type;
  45   typedef unsigned int ipv6_value_type;
  46 #else
  47   typedef int ipv4_value_type;
  48   typedef int ipv6_value_type;
  49 #endif
  50
  51   // Default constructor.
  52   multicast_enable_loopback()
  53     : ipv4_value_(0),
  54       ipv6_value_(0)
  55   {
  56   }
  57
  58   // Construct with a specific option value.
  59   explicit multicast_enable_loopback(bool v)
  60     : ipv4_value_(v ? 1 : 0),
  61       ipv6_value_(v ? 1 : 0)
  62   {
  63   }
  64
  65   // Set the value of the boolean.
  66   multicast_enable_loopback& operator=(bool v)
  67   {
  68     ipv4_value_ = v ? 1 : 0;
  69     ipv6_value_ = v ? 1 : 0;
  70     return *this;
  71   }
  72
  73   // Get the current value of the boolean.
  74   bool value() const
  75   {
  76     return !!ipv4_value_;
  77   }
  78
  79   // Convert to bool.
  80   operator bool() const
  81   {
  82     return !!ipv4_value_;
  83   }
  84
  85   // Test for false.
  86   bool operator!() const
  87   {
  88     return !ipv4_value_;
  89   }
  90
  91   // Get the level of the socket option.
  92   template <typename Protocol>
  93   int level(const Protocol& protocol) const
  94   {
  95     if (protocol.family() == PF_INET6)
  96       return IPv6_Level;
  97     return IPv4_Level;
  98   }
  99
 100   // Get the name of the socket option.
 101   template <typename Protocol>
 102   int name(const Protocol& protocol) const
 103   {
 104     if (protocol.family() == PF_INET6)
 105       return IPv6_Name;
 106     return IPv4_Name;
 107   }
 108
 109   // Get the address of the boolean data.
 110   template <typename Protocol>
 111   void* data(const Protocol& protocol)
 112   {
 113     if (protocol.family() == PF_INET6)
 114       return &ipv6_value_;
 115     return &ipv4_value_;
 116   }
 117
 118   // Get the address of the boolean data.
 119   template <typename Protocol>
 120   const void* data(const Protocol& protocol) const
 121   {
 122     if (protocol.family() == PF_INET6)
 123       return &ipv6_value_;
 124     return &ipv4_value_;
 125   }
 126
 127   // Get the size of the boolean data.
 128   template <typename Protocol>
 129   std::size_t size(const Protocol& protocol) const
 130   {
 131     if (protocol.family() == PF_INET6)
 132       return sizeof(ipv6_value_);
 133     return sizeof(ipv4_value_);
 134   }
 135
 136   // Set the size of the boolean data.
 137   template <typename Protocol>
 138   void resize(const Protocol& protocol, std::size_t s)
 139   {
 140     if (protocol.family() == PF_INET6)
 141     {
 142       if (s != sizeof(ipv6_value_))
 143       {
 144         std::length_error ex("multicast_enable_loopback socket option resize");
 145         boost::asio::detail::throw_exception(ex);
 146       }
 147       ipv4_value_ = ipv6_value_ ? 1 : 0;
 148     }
 149     else
 150     {
 151       if (s != sizeof(ipv4_value_))
 152       {
 153         std::length_error ex("multicast_enable_loopback socket option resize");
 154         boost::asio::detail::throw_exception(ex);
 155       }
 156       ipv6_value_ = ipv4_value_ ? 1 : 0;
 157     }
 158   }
 159
 160 private:
 161   ipv4_value_type ipv4_value_;
 162   ipv6_value_type ipv6_value_;
 163 };
 164
 165 // Helper template for implementing unicast hops options.
 166 template <int IPv4_Level, int IPv4_Name, int IPv6_Level, int IPv6_Name>
 167 class unicast_hops
 168 {
 169 public:
 170   // Default constructor.
 171   unicast_hops()
 172     : value_(0)
 173   {
 174   }
 175
 176   // Construct with a specific option value.
 177   explicit unicast_hops(int v)
 178     : value_(v)
 179   {
 180   }
 181
 182   // Set the value of the option.
 183   unicast_hops& operator=(int v)
 184   {
 185     value_ = v;
 186     return *this;
 187   }
 188
 189   // Get the current value of the option.
 190   int value() const
 191   {
 192     return value_;
 193   }
 194
 195   // Get the level of the socket option.
 196   template <typename Protocol>
 197   int level(const Protocol& protocol) const
 198   {
 199     if (protocol.family() == PF_INET6)
 200       return IPv6_Level;
 201     return IPv4_Level;
 202   }
 203
 204   // Get the name of the socket option.
 205   template <typename Protocol>
 206   int name(const Protocol& protocol) const
 207   {
 208     if (protocol.family() == PF_INET6)
 209       return IPv6_Name;
 210     return IPv4_Name;
 211   }
 212
 213   // Get the address of the data.
 214   template <typename Protocol>
 215   int* data(const Protocol&)
 216   {
 217     return &value_;
 218   }
 219
 220   // Get the address of the data.
 221   template <typename Protocol>
 222   const int* data(const Protocol&) const
 223   {
 224     return &value_;
 225   }
 226
 227   // Get the size of the data.
 228   template <typename Protocol>
 229   std::size_t size(const Protocol&) const
 230   {
 231     return sizeof(value_);
 232   }
 233
 234   // Set the size of the data.
 235   template <typename Protocol>
 236   void resize(const Protocol&, std::size_t s)
 237   {
 238     if (s != sizeof(value_))
 239     {
 240       std::length_error ex("unicast hops socket option resize");
 241       boost::asio::detail::throw_exception(ex);
 242     }
 243 #if defined(__hpux)
 244     if (value_ < 0)
 245       value_ = value_ & 0xFF;
 246 #endif
 247   }
 248
 249 private:
 250   int value_;
 251 };
 252
 253 // Helper template for implementing multicast hops options.
 254 template <int IPv4_Level, int IPv4_Name, int IPv6_Level, int IPv6_Name>
 255 class multicast_hops
 256 {
 257 public:
 258 #if defined(BOOST_ASIO_WINDOWS) && defined(UNDER_CE)
 259   typedef int ipv4_value_type;
 260 #else
 261   typedef unsigned char ipv4_value_type;
 262 #endif
 263   typedef int ipv6_value_type;
 264
 265   // Default constructor.
 266   multicast_hops()
 267     : ipv4_value_(0),
 268       ipv6_value_(0)
 269   {
 270   }
 271
 272   // Construct with a specific option value.
 273   explicit multicast_hops(int v)
 274   {
 275     if (v < 0 || v > 255)
 276     {
 277       std::out_of_range ex("multicast hops value out of range");
 278       boost::asio::detail::throw_exception(ex);
 279     }
 280     ipv4_value_ = (ipv4_value_type)v;
 281     ipv6_value_ = v;
 282   }
 283
 284   // Set the value of the option.
 285   multicast_hops& operator=(int v)
 286   {
 287     if (v < 0 || v > 255)
 288     {
 289       std::out_of_range ex("multicast hops value out of range");
 290       boost::asio::detail::throw_exception(ex);
 291     }
 292     ipv4_value_ = (ipv4_value_type)v;
 293     ipv6_value_ = v;
 294     return *this;
 295   }
 296
 297   // Get the current value of the option.
 298   int value() const
 299   {
 300     return ipv6_value_;
 301   }
 302
 303   // Get the level of the socket option.
 304   template <typename Protocol>
 305   int level(const Protocol& protocol) const
 306   {
 307     if (protocol.family() == PF_INET6)
 308       return IPv6_Level;
 309     return IPv4_Level;
 310   }
 311
 312   // Get the name of the socket option.
 313   template <typename Protocol>
 314   int name(const Protocol& protocol) const
 315   {
 316     if (protocol.family() == PF_INET6)
 317       return IPv6_Name;
 318     return IPv4_Name;
 319   }
 320
 321   // Get the address of the data.
 322   template <typename Protocol>
 323   void* data(const Protocol& protocol)
 324   {
 325     if (protocol.family() == PF_INET6)
 326       return &ipv6_value_;
 327     return &ipv4_value_;
 328   }
 329
 330   // Get the address of the data.
 331   template <typename Protocol>
 332   const void* data(const Protocol& protocol) const
 333   {
 334     if (protocol.family() == PF_INET6)
 335       return &ipv6_value_;
 336     return &ipv4_value_;
 337   }
 338
 339   // Get the size of the data.
 340   template <typename Protocol>
 341   std::size_t size(const Protocol& protocol) const
 342   {
 343     if (protocol.family() == PF_INET6)
 344       return sizeof(ipv6_value_);
 345     return sizeof(ipv4_value_);
 346   }
 347
 348   // Set the size of the data.
 349   template <typename Protocol>
 350   void resize(const Protocol& protocol, std::size_t s)
 351   {
 352     if (protocol.family() == PF_INET6)
 353     {
 354       if (s != sizeof(ipv6_value_))
 355       {
 356         std::length_error ex("multicast hops socket option resize");
 357         boost::asio::detail::throw_exception(ex);
 358       }
 359       if (ipv6_value_ < 0)
 360         ipv4_value_ = 0;
 361       else if (ipv6_value_ > 255)
 362         ipv4_value_ = 255;
 363       else
 364         ipv4_value_ = (ipv4_value_type)ipv6_value_;
 365     }
 366     else
 367     {
 368       if (s != sizeof(ipv4_value_))
 369       {
 370         std::length_error ex("multicast hops socket option resize");
 371         boost::asio::detail::throw_exception(ex);
 372       }
 373       ipv6_value_ = ipv4_value_;
 374     }
 375   }
 376
 377 private:
 378   ipv4_value_type ipv4_value_;
 379   ipv6_value_type ipv6_value_;
 380 };
 381
 382 // Helper template for implementing ip_mreq-based options.
 383 template <int IPv4_Level, int IPv4_Name, int IPv6_Level, int IPv6_Name>
 384 class multicast_request
 385 {
 386 public:
 387   // Default constructor.
 388   multicast_request()
 389     : ipv4_value_(), // Zero-initialisation gives the "any" address.
 390       ipv6_value_() // Zero-initialisation gives the "any" address.
 391   {
 392   }
 393
 394   // Construct with multicast address only.
 395   explicit multicast_request(const address& multicast_address)
 396     : ipv4_value_(), // Zero-initialisation gives the "any" address.
 397       ipv6_value_() // Zero-initialisation gives the "any" address.
 398   {
 399     if (multicast_address.is_v6())
 400     {
 401       using namespace std; // For memcpy.
 402       address_v6 ipv6_address = multicast_address.to_v6();
 403       address_v6::bytes_type bytes = ipv6_address.to_bytes();
 404       memcpy(ipv6_value_.ipv6mr_multiaddr.s6_addr, bytes.data(), 16);
 405       ipv6_value_.ipv6mr_interface = ipv6_address.scope_id();
 406     }
 407     else
 408     {
 409       ipv4_value_.imr_multiaddr.s_addr =
 410         boost::asio::detail::socket_ops::host_to_network_long(
 411             multicast_address.to_v4().to_uint());
 412       ipv4_value_.imr_interface.s_addr =
 413         boost::asio::detail::socket_ops::host_to_network_long(
 414             address_v4::any().to_uint());
 415     }
 416   }
 417
 418   // Construct with multicast address and IPv4 address specifying an interface.
 419   explicit multicast_request(const address_v4& multicast_address,
 420       const address_v4& network_interface = address_v4::any())
 421     : ipv6_value_() // Zero-initialisation gives the "any" address.
 422   {
 423     ipv4_value_.imr_multiaddr.s_addr =
 424       boost::asio::detail::socket_ops::host_to_network_long(
 425           multicast_address.to_uint());
 426     ipv4_value_.imr_interface.s_addr =
 427       boost::asio::detail::socket_ops::host_to_network_long(
 428           network_interface.to_uint());
 429   }
 430
 431   // Construct with multicast address and IPv6 network interface index.
 432   explicit multicast_request(
 433       const address_v6& multicast_address,
 434       unsigned long network_interface = 0)
 435     : ipv4_value_() // Zero-initialisation gives the "any" address.
 436   {
 437     using namespace std; // For memcpy.
 438     address_v6::bytes_type bytes = multicast_address.to_bytes();
 439     memcpy(ipv6_value_.ipv6mr_multiaddr.s6_addr, bytes.data(), 16);
 440     if (network_interface)
 441       ipv6_value_.ipv6mr_interface = network_interface;
 442     else
 443       ipv6_value_.ipv6mr_interface = multicast_address.scope_id();
 444   }
 445
 446   // Get the level of the socket option.
 447   template <typename Protocol>
 448   int level(const Protocol& protocol) const
 449   {
 450     if (protocol.family() == PF_INET6)
 451       return IPv6_Level;
 452     return IPv4_Level;
 453   }
 454
 455   // Get the name of the socket option.
 456   template <typename Protocol>
 457   int name(const Protocol& protocol) const
 458   {
 459     if (protocol.family() == PF_INET6)
 460       return IPv6_Name;
 461     return IPv4_Name;
 462   }
 463
 464   // Get the address of the option data.
 465   template <typename Protocol>
 466   const void* data(const Protocol& protocol) const
 467   {
 468     if (protocol.family() == PF_INET6)
 469       return &ipv6_value_;
 470     return &ipv4_value_;
 471   }
 472
 473   // Get the size of the option data.
 474   template <typename Protocol>
 475   std::size_t size(const Protocol& protocol) const
 476   {
 477     if (protocol.family() == PF_INET6)
 478       return sizeof(ipv6_value_);
 479     return sizeof(ipv4_value_);
 480   }
 481
 482 private:
 483   boost::asio::detail::in4_mreq_type ipv4_value_;
 484   boost::asio::detail::in6_mreq_type ipv6_value_;
 485 };
 486
 487 // Helper template for implementing options that specify a network interface.
 488 template <int IPv4_Level, int IPv4_Name, int IPv6_Level, int IPv6_Name>
 489 class network_interface
 490 {
 491 public:
 492   // Default constructor.
 493   network_interface()
 494   {
 495     ipv4_value_.s_addr =
 496       boost::asio::detail::socket_ops::host_to_network_long(
 497           address_v4::any().to_uint());
 498     ipv6_value_ = 0;
 499   }
 500
 501   // Construct with IPv4 interface.
 502   explicit network_interface(const address_v4& ipv4_interface)
 503   {
 504     ipv4_value_.s_addr =
 505       boost::asio::detail::socket_ops::host_to_network_long(
 506           ipv4_interface.to_uint());
 507     ipv6_value_ = 0;
 508   }
 509
 510   // Construct with IPv6 interface.
 511   explicit network_interface(unsigned int ipv6_interface)
 512   {
 513     ipv4_value_.s_addr =
 514       boost::asio::detail::socket_ops::host_to_network_long(
 515           address_v4::any().to_uint());
 516     ipv6_value_ = ipv6_interface;
 517   }
 518
 519   // Get the level of the socket option.
 520   template <typename Protocol>
 521   int level(const Protocol& protocol) const
 522   {
 523     if (protocol.family() == PF_INET6)
 524       return IPv6_Level;
 525     return IPv4_Level;
 526   }
 527
 528   // Get the name of the socket option.
 529   template <typename Protocol>
 530   int name(const Protocol& protocol) const
 531   {
 532     if (protocol.family() == PF_INET6)
 533       return IPv6_Name;
 534     return IPv4_Name;
 535   }
 536
 537   // Get the address of the option data.
 538   template <typename Protocol>
 539   const void* data(const Protocol& protocol) const
 540   {
 541     if (protocol.family() == PF_INET6)
 542       return &ipv6_value_;
 543     return &ipv4_value_;
 544   }
 545
 546   // Get the size of the option data.
 547   template <typename Protocol>
 548   std::size_t size(const Protocol& protocol) const
 549   {
 550     if (protocol.family() == PF_INET6)
 551       return sizeof(ipv6_value_);
 552     return sizeof(ipv4_value_);
 553   }
 554
 555 private:
 556   boost::asio::detail::in4_addr_type ipv4_value_;
 557   unsigned int ipv6_value_;
 558 };
 559
 560 } // namespace socket_option
 561 } // namespace detail
 562 } // namespace ip
 563 } // namespace asio
 564 } // namespace boost
 565
 566 #include <boost/asio/detail/pop_options.hpp>
 567
 568 #endif // BOOST_ASIO_IP_DETAIL_SOCKET_OPTION_HPP