experimental UDP/TCP auth server using boost::asio

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/jinmei-asio@1195 e5f2f494-b856-4b98-b285-d166d9295462

configure.ac

@@ -12,6 +12,10 @@ AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_LIBTOOL
 
+# Use C++ language
+AC_LANG_CPLUSPLUS
+AX_COMPILER_VENDOR
+
 m4_define([_AM_PYTHON_INTERPRETER_LIST], [python python3 python3.1])
 AM_PATH_PYTHON([3.1])
 
@@ -86,6 +90,46 @@ if test "$lcov" != "no"; then
 fi
 AC_SUBST(USE_LCOV)
 
+# Check availability of the Boost System library
+
+AC_MSG_CHECKING([for boost::system library])
+AC_ARG_WITH([boostlib],
+AC_HELP_STRING([--with-boostlib=PATH],
+  [specify a path to boost libraries if it is not automatically found]),
+  [boostlib_path="$withval"], [boostlib_path="no"])
+if test "$boostlib_path" != "no"; then
+	BOOST_LDFLAGS="-L$boostlib_path"
+fi
+
+LDFLAGS_SAVED="$LDFLAGS"
+LIBS_SAVED="$LIBS"
+CPPFLAGS_SAVED="$CPPFLAGS"
+CPPFLAGS="$CPPFLAGS -Iext"
+
+for BOOST_TRY_LIB in boost_system boost_system-mt; do
+	LDFLAGS="$LDFLAGS_SAVED ${BOOST_LDFLAGS}"
+	LIBS="$LIBS_SAVED -l${BOOST_TRY_LIB}"
+	AC_TRY_LINK([#include <boost/system/error_code.hpp>],
+		[ boost::system::error_code error_code;
+		  std::string message(error_code.message());
+		  return 0; ],
+	[ AC_MSG_RESULT(ok)
+	  BOOST_SYSTEM_LIB="-l${BOOST_TRY_LIB}"
+	  ],[])
+	if test "X${BOOST_SYSTEM_LIB}" != X; then
+        	break
+	fi
+done
+
+if test "X${BOOST_SYSTEM_LIB}" = X; then
+	AC_MSG_RESULT(not found)
+	AC_MSG_ERROR(Unable to link with the boost::system library)
+fi
+
+CPPFLAGS="$CPPFLAGS_SAVED"
+LIBS="$LIBS_SAVED"
+AC_SUBST(BOOST_SYSTEM_LIB)
+
 #
 # Check availability of gtest, which will be used for unit tests.
 #

ext/boost/system/config.hpp

+//  boost/system/config.hpp  -------------------------------------------------//
+
+//  Copyright Beman Dawes 2003, 2006
+
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/system for documentation.
+
+#ifndef BOOST_SYSTEM_CONFIG_HPP                  
+#define BOOST_SYSTEM_CONFIG_HPP
+
+#include <boost/config.hpp>
+
+//  BOOST_POSIX_API or BOOST_WINDOWS_API specify which API to use.
+//  If not specified, a sensible default will be applied.
+
+# if defined( BOOST_WINDOWS_API ) && defined( BOOST_POSIX_API )
+#   error both BOOST_WINDOWS_API and BOOST_POSIX_API are defined
+# elif !defined( BOOST_WINDOWS_API ) && !defined( BOOST_POSIX_API )
+#   if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__CYGWIN__)
+#     define BOOST_WINDOWS_API
+#   else
+#     define BOOST_POSIX_API 
+#   endif
+# endif
+
+//  enable dynamic linking on Windows  ---------------------------------------//
+
+//#  if (defined(BOOST_ALL_DYN_LINK) || defined(BOOST_SYSTEM_DYN_LINK)) && defined(__BORLANDC__) && defined(__WIN32__)
+//#    error Dynamic linking Boost.System does not work for Borland; use static linking instead
+//#  endif
+
+#ifdef BOOST_HAS_DECLSPEC // defined in config system
+// we need to import/export our code only if the user has specifically
+// asked for it by defining either BOOST_ALL_DYN_LINK if they want all boost
+// libraries to be dynamically linked, or BOOST_SYSTEM_DYN_LINK
+// if they want just this one to be dynamically liked:
+#if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_SYSTEM_DYN_LINK)
+// export if this is our own source, otherwise import:
+#ifdef BOOST_SYSTEM_SOURCE
+# define BOOST_SYSTEM_DECL __declspec(dllexport)
+#else
+# define BOOST_SYSTEM_DECL __declspec(dllimport)
+#endif  // BOOST_SYSTEM_SOURCE
+#endif  // DYN_LINK
+#endif  // BOOST_HAS_DECLSPEC
+//
+// if BOOST_SYSTEM_DECL isn't defined yet define it now:
+#ifndef BOOST_SYSTEM_DECL
+#define BOOST_SYSTEM_DECL
+#endif
+
+//  enable automatic library variant selection  ------------------------------// 
+
+#if !defined(BOOST_SYSTEM_SOURCE) && !defined(BOOST_ALL_NO_LIB) && !defined(BOOST_SYSTEM_NO_LIB)
+//
+// Set the name of our library, this will get undef'ed by auto_link.hpp
+// once it's done with it:
+//
+#define BOOST_LIB_NAME boost_system
+//
+// If we're importing code from a dll, then tell auto_link.hpp about it:
+//
+#if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_SYSTEM_DYN_LINK)
+#  define BOOST_DYN_LINK
+#endif
+//
+// And include the header that does the work:
+//
+#include <boost/config/auto_link.hpp>
+#endif  // auto-linking disabled
+
+#endif // BOOST_SYSTEM_CONFIG_HPP
+

ext/boost/system/cygwin_error.hpp

+//  boost/system/cygwin_error.hpp  -------------------------------------------//
+
+//  Copyright Beman Dawes 2007
+
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See library home page at http://www.boost.org/libs/system
+
+#ifndef BOOST_CYGWIN_ERROR_HPP
+#define BOOST_CYGWIN_ERROR_HPP
+
+//  This header is effectively empty for compiles on operating systems where
+//  it is not applicable.
+
+# ifdef __CYGWIN__
+
+#include <boost/system/error_code.hpp>
+
+namespace boost
+{
+  namespace system
+  {
+    //  To construct an error_code after a API error:
+    //
+    //      error_code( errno, system_category )
+
+    //  User code should use the portable "posix" enums for POSIX errors; this
+    //  allows such code to be portable to non-POSIX systems. For the non-POSIX
+    //  errno values that POSIX-based systems typically provide in addition to 
+    //  POSIX values, use the system specific enums below.
+
+   namespace cygwin_error
+    {
+      enum cygwin_errno
+      {
+        no_net = ENONET,
+        no_package = ENOPKG,
+        no_share = ENOSHARE
+      };
+    }  // namespace cygwin_error
+
+    template<> struct is_error_code_enum<cygwin_error::cygwin_errno>
+      { static const bool value = true; };
+
+    namespace cygwin_error
+    {
+      inline error_code make_error_code( cygwin_errno e )
+        { return error_code( e, get_system_category() ); }
+    }
+  }
+}
+
+#endif  // __CYGWIN__
+
+#endif  // BOOST_CYGWIN_ERROR_HPP

ext/boost/system/error_code.hpp

+//  boost/system/error_code.hpp  ---------------------------------------------//
+
+//  Copyright Beman Dawes 2006, 2007
+//  Copyright Christoper Kohlhoff 2007
+
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See library home page at http://www.boost.org/libs/system
+
+#ifndef BOOST_ERROR_CODE_HPP
+#define BOOST_ERROR_CODE_HPP
+
+#include <boost/system/config.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/assert.hpp>
+#include <boost/operators.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/utility/enable_if.hpp>
+#include <ostream>
+#include <string>
+#include <stdexcept>
+#include <functional>
+
+// TODO: undef these macros if not already defined
+#include <boost/cerrno.hpp> 
+
+#if !defined(BOOST_POSIX_API) && !defined(BOOST_WINDOWS_API)
+#  error BOOST_POSIX_API or BOOST_WINDOWS_API must be defined
+#endif
+
+#include <boost/config/abi_prefix.hpp> // must be the last #include
+
+namespace boost
+{
+  namespace system
+  {
+
+    class error_code;
+    class error_condition;
+
+    //  "Concept" helpers  ---------------------------------------------------//
+
+    template< class T >
+    struct is_error_code_enum { static const bool value = false; };
+
+    template< class T >
+    struct is_error_condition_enum { static const bool value = false; };
+
+    //  generic error_conditions  --------------------------------------------//
+
+    namespace errc
+    {
+      enum errc_t
+      {
+        success = 0,
+        address_family_not_supported = EAFNOSUPPORT,
+        address_in_use = EADDRINUSE,
+        address_not_available = EADDRNOTAVAIL,
+        already_connected = EISCONN,
+        argument_list_too_long = E2BIG,
+        argument_out_of_domain = EDOM,
+        bad_address = EFAULT,
+        bad_file_descriptor = EBADF,
+        bad_message = EBADMSG,
+        broken_pipe = EPIPE,
+        connection_aborted = ECONNABORTED,
+        connection_already_in_progress = EALREADY,
+        connection_refused = ECONNREFUSED,
+        connection_reset = ECONNRESET,
+        cross_device_link = EXDEV,
+        destination_address_required = EDESTADDRREQ,
+        device_or_resource_busy = EBUSY,
+        directory_not_empty = ENOTEMPTY,
+        executable_format_error = ENOEXEC,
+        file_exists = EEXIST,
+        file_too_large = EFBIG,
+        filename_too_long = ENAMETOOLONG,
+        function_not_supported = ENOSYS,
+        host_unreachable = EHOSTUNREACH,
+        identifier_removed = EIDRM,
+        illegal_byte_sequence = EILSEQ,
+        inappropriate_io_control_operation = ENOTTY,
+        interrupted = EINTR,
+        invalid_argument = EINVAL,
+        invalid_seek = ESPIPE,
+        io_error = EIO,
+        is_a_directory = EISDIR,
+        message_size = EMSGSIZE,
+        network_down = ENETDOWN,
+        network_reset = ENETRESET,
+        network_unreachable = ENETUNREACH,
+        no_buffer_space = ENOBUFS,
+        no_child_process = ECHILD,
+        no_link = ENOLINK,
+        no_lock_available = ENOLCK,
+        no_message_available = ENODATA,
+        no_message = ENOMSG,
+        no_protocol_option = ENOPROTOOPT,
+        no_space_on_device = ENOSPC,
+        no_stream_resources = ENOSR,
+        no_such_device_or_address = ENXIO,
+        no_such_device = ENODEV,
+        no_such_file_or_directory = ENOENT,
+        no_such_process = ESRCH,
+        not_a_directory = ENOTDIR,
+        not_a_socket = ENOTSOCK,
+        not_a_stream = ENOSTR,
+        not_connected = ENOTCONN,
+        not_enough_memory = ENOMEM,
+        not_supported = ENOTSUP,
+        operation_canceled = ECANCELED,
+        operation_in_progress = EINPROGRESS,
+        operation_not_permitted = EPERM,
+        operation_not_supported = EOPNOTSUPP,
+        operation_would_block = EWOULDBLOCK,
+        owner_dead = EOWNERDEAD,
+        permission_denied = EACCES,
+        protocol_error = EPROTO,
+        protocol_not_supported = EPROTONOSUPPORT,
+        read_only_file_system = EROFS,
+        resource_deadlock_would_occur = EDEADLK,
+        resource_unavailable_try_again = EAGAIN,
+        result_out_of_range = ERANGE,
+        state_not_recoverable = ENOTRECOVERABLE,
+        stream_timeout = ETIME,
+        text_file_busy = ETXTBSY,
+        timed_out = ETIMEDOUT,
+        too_many_files_open_in_system = ENFILE,
+        too_many_files_open = EMFILE,
+        too_many_links = EMLINK,
+        too_many_synbolic_link_levels = ELOOP,
+        value_too_large = EOVERFLOW,
+        wrong_protocol_type = EPROTOTYPE
+      };
+
+    } // namespace errc
+
+# ifndef BOOST_SYSTEM_NO_DEPRECATED
+    namespace posix = errc;
+    namespace posix_error = errc;
+# endif
+
+    template<> struct is_error_condition_enum<errc::errc_t>
+      { static const bool value = true; };
+
+
+    //  ----------------------------------------------------------------------//
+
+    //  Operating system specific interfaces  --------------------------------//
+
+
+    //  The interface is divided into general and system-specific portions to
+    //  meet these requirements:
+    //
+    //  * Code calling an operating system API can create an error_code with
+    //    a single category (system_category), even for POSIX-like operating
+    //    systems that return some POSIX errno values and some native errno
+    //    values. This code should not have to pay the cost of distinguishing
+    //    between categories, since it is not yet known if that is needed.
+    //
+    //  * Users wishing to write system-specific code should be given enums for
+    //    at least the common error cases.
+    //
+    //  * System specific code should fail at compile time if moved to another
+    //    operating system.
+
+    //  The system specific portions of the interface are located in headers
+    //  with names reflecting the operating system. For example,
+    //
+    //       <boost/system/cygwin_error.hpp>
+    //       <boost/system/linux_error.hpp>
+    //       <boost/system/windows_error.hpp>
+    //
+    //  These headers are effectively empty for compiles on operating systems
+    //  where they are not applicable.
+
+    //  ----------------------------------------------------------------------//
+
+    //  class error_category  ------------------------------------------------//
+
+    class error_category : public noncopyable
+    {
+    public:
+      virtual ~error_category(){}
+      virtual inline const char *    name() const;  // see implementation note below
+      virtual inline std::string     message( int ev ) const;   // see implementation note below
+      virtual inline error_condition default_error_condition( int ev ) const;
+      virtual inline bool equivalent( int code, const error_condition & condition ) const;
+      virtual inline bool equivalent( const error_code & code, int condition ) const;
+
+      bool operator==(const error_category & rhs) const { return this == &rhs; }
+      bool operator!=(const error_category & rhs) const { return this != &rhs; }
+      bool operator<( const error_category & rhs ) const
+      {
+        return std::less<const error_category*>()( this, &rhs );
+      }
+    };
+
+    //  predefined error categories  -----------------------------------------//
+
+    BOOST_SYSTEM_DECL const error_category &  get_system_category();
+    BOOST_SYSTEM_DECL const error_category &  get_generic_category();
+
+    static const error_category &  system_category = get_system_category();
+    static const error_category &  generic_category = get_generic_category();
+    
+# ifndef BOOST_SYSTEM_NO_DEPRECATED
+    //  deprecated synonyms
+    inline const error_category &  get_posix_category() { return get_generic_category(); }
+    static const error_category &  posix_category = get_generic_category();
+    static const error_category &  errno_ecat     = get_generic_category();
+    static const error_category &  native_ecat    = get_system_category();
+# endif
+
+    //  class error_condition  -----------------------------------------------//
+
+    //  error_conditions are portable, error_codes are system or library specific
+
+    class error_condition
+    {
+    public:
+
+      // constructors:
+      error_condition() : m_val(0), m_cat(&get_generic_category()) {}
+      error_condition( int val, const error_category & cat ) : m_val(val), m_cat(&cat) {}
+
+      template <class ErrorConditionEnum>
+        error_condition(ErrorConditionEnum e,
+          typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum> >::type* = 0)
+      {
+        *this = make_error_condition(e);
+      }
+
+      // modifiers:
+
+      void assign( int val, const error_category & cat )
+      { 
+        m_val = val;
+        m_cat = &cat;
+      }
+                                             
+      template<typename ErrorConditionEnum>
+        typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum>, error_condition>::type &
+          operator=( ErrorConditionEnum val )
+      { 
+        *this = make_error_condition(val);
+        return *this;
+      }
+
+      void clear()
+      {
+        m_val = 0;
+        m_cat = &get_generic_category();
+      }
+
+      // observers:
+      int                     value() const    { return m_val; }
+      const error_category &  category() const { return *m_cat; }
+      std::string             message() const  { return m_cat->message(value()); }
+
+      typedef void (*unspecified_bool_type)();
+      static void unspecified_bool_true() {}
+
+      operator unspecified_bool_type() const  // true if error
+      { 
+        return m_val == 0 ? 0 : unspecified_bool_true;
+      }
+
+      bool operator!() const  // true if no error
+      {
+        return m_val == 0;
+      }
+
+      // relationals:
+      //  the more symmetrical non-member syntax allows enum
+      //  conversions work for both rhs and lhs.
+      inline friend bool operator==( const error_condition & lhs,
+                                     const error_condition & rhs )
+      {
+        return lhs.m_cat == rhs.m_cat && lhs.m_val == rhs.m_val;
+      }                  
+
+      inline friend bool operator<( const error_condition & lhs,
+                                    const error_condition & rhs )
+        //  the more symmetrical non-member syntax allows enum
+        //  conversions work for both rhs and lhs.
+      {
+        return lhs.m_cat < rhs.m_cat
+          || (lhs.m_cat == rhs.m_cat && lhs.m_val < rhs.m_val);
+      }
+
+    private:
+      int                     m_val;
+      const error_category *  m_cat;
+
+    };
+
+    //  class error_code  ----------------------------------------------------//
+
+    //  We want error_code to be a value type that can be copied without slicing
+    //  and without requiring heap allocation, but we also want it to have
+    //  polymorphic behavior based on the error category. This is achieved by
+    //  abstract base class error_category supplying the polymorphic behavior,
+    //  and error_code containing a pointer to an object of a type derived
+    //  from error_category.
+    class error_code
+    {
+    public:
+
+      // constructors:
+      error_code() : m_val(0), m_cat(&get_system_category()) {}
+      error_code( int val, const error_category & cat ) : m_val(val), m_cat(&cat) {}
+
+      template <class ErrorCodeEnum>
+        error_code(ErrorCodeEnum e,
+          typename boost::enable_if<is_error_code_enum<ErrorCodeEnum> >::type* = 0)
+      {
+        *this = make_error_code(e);
+      }
+
+      // modifiers:
+      void assign( int val, const error_category & cat )
+      { 
+        m_val = val;
+        m_cat = &cat;
+      }
+                                             
+      template<typename ErrorCodeEnum>
+        typename boost::enable_if<is_error_code_enum<ErrorCodeEnum>, error_code>::type &
+          operator=( ErrorCodeEnum val )
+      { 
+        *this = make_error_code(val);
+        return *this;
+      }
+
+      void clear()
+      {
+        m_val = 0;
+        m_cat = &get_system_category();
+      }
+
+      // observers:
+      int                     value() const    { return m_val; }
+      const error_category &  category() const { return *m_cat; }
+      error_condition         default_error_condition() const  { return m_cat->default_error_condition(value()); }
+      std::string             message() const  { return m_cat->message(value()); }
+
+      typedef void (*unspecified_bool_type)();
+      static void unspecified_bool_true() {}
+
+      operator unspecified_bool_type() const  // true if error
+      { 
+        return m_val == 0 ? 0 : unspecified_bool_true;
+      }
+
+      bool operator!() const  // true if no error
+      {
+        return m_val == 0;
+      }
+
+      // relationals:
+      inline friend bool operator==( const error_code & lhs,
+                                     const error_code & rhs )
+        //  the more symmetrical non-member syntax allows enum
+        //  conversions work for both rhs and lhs.
+      {
+        return lhs.m_cat == rhs.m_cat && lhs.m_val == rhs.m_val;
+      }
+
+      inline friend bool operator<( const error_code & lhs,
+                                    const error_code & rhs )
+        //  the more symmetrical non-member syntax allows enum
+        //  conversions work for both rhs and lhs.
+      {
+        return lhs.m_cat < rhs.m_cat
+          || (lhs.m_cat == rhs.m_cat && lhs.m_val < rhs.m_val);
+      }
+                  
+      private:
+      int                     m_val;
+      const error_category *  m_cat;
+
+    };
+
+    //  predefined error_code object used as "throw on error" tag
+# ifndef BOOST_SYSTEM_NO_DEPRECATED
+    BOOST_SYSTEM_DECL extern error_code throws;
+# endif
+
+    //  Moving from a "throws" object to a "throws" function without breaking
+    //  existing code is a bit of a problem. The workaround is to place the
+    //  "throws" function in namespace boost rather than namespace boost::system.
+
+  }  // namespace system
+
+  namespace detail { inline system::error_code * throws() { return 0; } }
+    //  Misuse of the error_code object is turned into a noisy failure by
+    //  poisoning the reference. This particular implementation doesn't
+    //  produce warnings or errors from popular compilers, is very efficient
+    //  (as determined by inspecting generated code), and does not suffer
+    //  from order of initialization problems. In practice, it also seems
+    //  cause user function error handling implementation errors to be detected
+    //  very early in the development cycle.
+
+  inline system::error_code & throws()
+    { return *detail::throws(); }
+
+  namespace system
+  {
+    //  non-member functions  ------------------------------------------------//
+
+    inline bool operator!=( const error_code & lhs,
+                            const error_code & rhs )
+    {
+      return !(lhs == rhs);
+    }
+
+    inline bool operator!=( const error_condition & lhs,
+                            const error_condition & rhs )
+    {
+      return !(lhs == rhs);
+    }
+
+    inline bool operator==( const error_code & code,
+                            const error_condition & condition )
+    {
+      return code.category().equivalent( code.value(), condition )
+        || condition.category().equivalent( code, condition.value() );
+    }
+                
+    inline bool operator!=( const error_code & lhs,
+                            const error_condition & rhs )
+    {
+      return !(lhs == rhs);