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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . S O C K E T S . T H I N --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 2002-2007, AdaCore --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 2, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
+-- for more details. You should have received a copy of the GNU General --
+-- Public License distributed with GNAT; see file COPYING. If not, write --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
+-- --
+-- As a special exception, if other files instantiate generics from this --
+-- unit, or you link this unit with other files to produce an executable, --
+-- this unit does not by itself cause the resulting executable to be --
+-- covered by the GNU General Public License. This exception does not --
+-- however invalidate any other reasons why the executable file might be --
+-- covered by the GNU Public License. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This package provides a target dependent thin interface to the sockets
+-- layer for use by the GNAT.Sockets package (g-socket.ads). This package
+-- should not be directly with'ed by an applications program.
+
+-- This is the version for VxWorks
+
+with Interfaces.C.Pointers;
+with Interfaces.C.Strings;
+
+with Ada.Unchecked_Conversion;
+
+with GNAT.OS_Lib;
+with GNAT.Sockets.Constants;
+
+with System;
+
+package GNAT.Sockets.Thin is
+
+ package C renames Interfaces.C;
+
+ use type C.int;
+ -- This is so we can declare the Failure constant below
+
+ Success : constant C.int := 0;
+ Failure : constant C.int := -1;
+
+ function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
+ -- Returns last socket error number
+
+ procedure Set_Socket_Errno (Errno : Integer) renames GNAT.OS_Lib.Set_Errno;
+ -- Set last socket error number
+
+ function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
+ -- Returns the error message string for the error number Errno. If Errno is
+ -- not known, returns "Unknown system error".
+
+ function Host_Errno return Integer;
+ pragma Import (C, Host_Errno, "__gnat_get_h_errno");
+ -- Returns last host error number
+
+ package Host_Error_Messages is
+
+ function Host_Error_Message
+ (H_Errno : Integer) return C.Strings.chars_ptr;
+ -- Returns the error message string for the host error number H_Errno.
+ -- If H_Errno is not known, returns "Unknown system error".
+
+ end Host_Error_Messages;
+
+ subtype Fd_Set_Access is System.Address;
+ No_Fd_Set : constant Fd_Set_Access := System.Null_Address;
+
+ type time_t is
+ range -2 ** (8 * Constants.SIZEOF_tv_sec - 1)
+ .. 2 ** (8 * Constants.SIZEOF_tv_sec - 1) - 1;
+ for time_t'Size use 8 * Constants.SIZEOF_tv_sec;
+ pragma Convention (C, time_t);
+
+ type suseconds_t is
+ range -2 ** (8 * Constants.SIZEOF_tv_usec - 1)
+ .. 2 ** (8 * Constants.SIZEOF_tv_usec - 1) - 1;
+ for suseconds_t'Size use 8 * Constants.SIZEOF_tv_usec;
+ pragma Convention (C, suseconds_t);
+
+ type Timeval is record
+ Tv_Sec : time_t;
+ Tv_Usec : suseconds_t;
+ end record;
+ pragma Convention (C, Timeval);
+
+ type Timeval_Access is access all Timeval;
+ pragma Convention (C, Timeval_Access);
+
+ Immediat : constant Timeval := (0, 0);
+
+ type Int_Access is access all C.int;
+ pragma Convention (C, Int_Access);
+ -- Access to C integers
+
+ type Chars_Ptr_Array is array (C.size_t range <>) of
+ aliased C.Strings.chars_ptr;
+
+ package Chars_Ptr_Pointers is
+ new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
+ C.Strings.Null_Ptr);
+ -- Arrays of C (char *)
+
+ type In_Addr is record
+ S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
+ end record;
+ for In_Addr'Alignment use C.int'Alignment;
+ pragma Convention (C, In_Addr);
+ -- IPv4 address, represented as a network-order C.int. Note that the
+ -- underlying operating system may assume that values of this type have
+ -- C.int alignment, so we need to provide a suitable alignment clause here.
+
+ function To_In_Addr is new Ada.Unchecked_Conversion (C.int, In_Addr);
+
+ type In_Addr_Access is access all In_Addr;
+ pragma Convention (C, In_Addr_Access);
+ -- Access to internet address
+
+ Inaddr_Any : aliased constant In_Addr := (others => 0);
+ -- Any internet address (all the interfaces)
+
+ type In_Addr_Access_Array is array (C.size_t range <>)
+ of aliased In_Addr_Access;
+ pragma Convention (C, In_Addr_Access_Array);
+
+ package In_Addr_Access_Pointers is
+ new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
+ -- Array of internet addresses
+
+ type Sockaddr is record
+ Sa_Length : C.unsigned_char;
+ Sa_Family : C.unsigned_char;
+ Sa_Data : C.char_array (1 .. 14);
+ end record;
+ pragma Convention (C, Sockaddr);
+ -- Socket address
+
+ type Sockaddr_Access is access all Sockaddr;
+ pragma Convention (C, Sockaddr_Access);
+ -- Access to socket address
+
+ type Sockaddr_In is record
+ Sin_Length : C.unsigned_char := 0;
+ Sin_Family : C.unsigned_char := Constants.AF_INET;
+ Sin_Port : C.unsigned_short := 0;
+ Sin_Addr : In_Addr := Inaddr_Any;
+ Sin_Zero : C.char_array (1 .. 8) := (others => C.char'Val (0));
+ end record;
+ pragma Convention (C, Sockaddr_In);
+ -- Internet socket address
+
+ type Sockaddr_In_Access is access all Sockaddr_In;
+ pragma Convention (C, Sockaddr_In_Access);
+ -- Access to internet socket address
+
+ procedure Set_Length
+ (Sin : Sockaddr_In_Access;
+ Len : C.int);
+ pragma Inline (Set_Length);
+ -- Set Sin.Sin_Length to Len
+
+ procedure Set_Family
+ (Sin : Sockaddr_In_Access;
+ Family : C.int);
+ pragma Inline (Set_Family);
+ -- Set Sin.Sin_Family to Family
+
+ procedure Set_Port
+ (Sin : Sockaddr_In_Access;
+ Port : C.unsigned_short);
+ pragma Inline (Set_Port);
+ -- Set Sin.Sin_Port to Port
+
+ procedure Set_Address
+ (Sin : Sockaddr_In_Access;
+ Address : In_Addr);
+ pragma Inline (Set_Address);
+ -- Set Sin.Sin_Addr to Address
+
+ type Hostent is record
+ H_Name : C.Strings.chars_ptr;
+ H_Aliases : Chars_Ptr_Pointers.Pointer;
+ H_Addrtype : C.int;
+ H_Length : C.int;
+ H_Addr_List : In_Addr_Access_Pointers.Pointer;
+ end record;
+ pragma Convention (C, Hostent);
+ -- Host entry
+
+ type Hostent_Access is access all Hostent;
+ pragma Convention (C, Hostent_Access);
+ -- Access to host entry
+
+ type Servent is record
+ S_Name : C.Strings.chars_ptr;
+ S_Aliases : Chars_Ptr_Pointers.Pointer;
+ S_Port : C.int;
+ S_Proto : C.Strings.chars_ptr;
+ end record;
+ pragma Convention (C, Servent);
+ -- Service entry
+
+ type Servent_Access is access all Servent;
+ pragma Convention (C, Servent_Access);
+ -- Access to service entry
+
+ type Two_Ints is array (0 .. 1) of C.int;
+ pragma Convention (C, Two_Ints);
+ -- Container for two int values
+
+ subtype Fd_Pair is Two_Ints;
+ -- Two_Ints as used for Create_Signalling_Fds: a pair of connected file
+ -- descriptors, one of which (the "read end" of the connection) being used
+ -- for reading, the other one (the "write end") being used for writing.
+
+ Read_End : constant := 0;
+ Write_End : constant := 1;
+ -- Indices into an Fd_Pair value providing access to each of the connected
+ -- file descriptors.
+
+ --------------------------------
+ -- Standard library functions --
+ --------------------------------
+
+ function C_Accept
+ (S : C.int;
+ Addr : System.Address;
+ Addrlen : not null access C.int) return C.int;
+
+ function C_Bind
+ (S : C.int;
+ Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Close
+ (Fd : C.int) return C.int;
+
+ function C_Connect
+ (S : C.int;
+ Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Gethostname
+ (Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Getpeername
+ (S : C.int;
+ Name : System.Address;
+ Namelen : not null access C.int) return C.int;
+
+ function C_Getsockname
+ (S : C.int;
+ Name : System.Address;
+ Namelen : not null access C.int) return C.int;
+
+ function C_Getsockopt
+ (S : C.int;
+ Level : C.int;
+ Optname : C.int;
+ Optval : System.Address;
+ Optlen : not null access C.int) return C.int;
+
+ function C_Inet_Addr
+ (Cp : C.Strings.chars_ptr) return C.int;
+
+ function C_Ioctl
+ (S : C.int;
+ Req : C.int;
+ Arg : Int_Access) return C.int;
+
+ function C_Listen
+ (S : C.int;
+ Backlog : C.int) return C.int;
+
+ function C_Readv
+ (Fd : C.int;
+ Iov : System.Address;
+ Iovcnt : C.int) return C.int;
+
+ function C_Recv
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int) return C.int;
+
+ function C_Recvfrom
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int;
+ From : Sockaddr_In_Access;
+ Fromlen : not null access C.int) return C.int;
+
+ function C_Select
+ (Nfds : C.int;
+ Readfds : Fd_Set_Access;
+ Writefds : Fd_Set_Access;
+ Exceptfds : Fd_Set_Access;
+ Timeout : Timeval_Access) return C.int;
+
+ function C_Send
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int) return C.int;
+
+ function C_Sendto
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int;
+ To : Sockaddr_In_Access;
+ Tolen : C.int) return C.int;
+
+ function C_Setsockopt
+ (S : C.int;
+ Level : C.int;
+ Optname : C.int;
+ Optval : System.Address;
+ Optlen : C.int) return C.int;
+
+ function C_Shutdown
+ (S : C.int;
+ How : C.int) return C.int;
+
+ function C_Socket
+ (Domain : C.int;
+ Typ : C.int;
+ Protocol : C.int) return C.int;
+
+ function C_Strerror
+ (Errnum : C.int) return C.Strings.chars_ptr;
+
+ function C_System
+ (Command : System.Address) return C.int;
+
+ function C_Writev
+ (Fd : C.int;
+ Iov : System.Address;
+ Iovcnt : C.int) return C.int;
+
+ -------------------------------------------------------
+ -- Signalling file descriptors for selector abortion --
+ -------------------------------------------------------
+
+ package Signalling_Fds is
+
+ function Create (Fds : not null access Fd_Pair) return C.int;
+ pragma Convention (C, Create);
+ -- Create a pair of connected descriptors suitable for use with C_Select
+ -- (used for signalling in Selector objects).
+
+ function Read (Rsig : C.int) return C.int;
+ pragma Convention (C, Read);
+ -- Read one byte of data from rsig, the read end of a pair of signalling
+ -- fds created by Create_Signalling_Fds.
+
+ function Write (Wsig : C.int) return C.int;
+ pragma Convention (C, Write);
+ -- Write one byte of data to wsig, the write end of a pair of signalling
+ -- fds created by Create_Signalling_Fds.
+
+ procedure Close (Sig : C.int);
+ pragma Convention (C, Close);
+ -- Close one end of a pair of signalling fds (ignoring any error)
+
+ end Signalling_Fds;
+
+ ----------------------------
+ -- Socket sets management --
+ ----------------------------
+
+ procedure Free_Socket_Set
+ (Set : Fd_Set_Access);
+ -- Free system-dependent socket set
+
+ procedure Get_Socket_From_Set
+ (Set : Fd_Set_Access;
+ Socket : Int_Access;
+ Last : Int_Access);
+ -- Get last socket in Socket and remove it from the socket set. The
+ -- parameter Last is a maximum value of the largest socket. This hint is
+ -- used to avoid scanning very large socket sets. After a call to
+ -- Get_Socket_From_Set, Last is set back to the real largest socket in the
+ -- socket set.
+
+ procedure Insert_Socket_In_Set
+ (Set : Fd_Set_Access;
+ Socket : C.int);
+ -- Insert socket in the socket set
+
+ function Is_Socket_In_Set
+ (Set : Fd_Set_Access;
+ Socket : C.int) return C.int;
+ -- Check whether Socket is in the socket set, return a non-zero
+ -- value if it is, zero if it is not.
+
+ procedure Last_Socket_In_Set
+ (Set : Fd_Set_Access;
+ Last : Int_Access);
+ -- Find the largest socket in the socket set. This is needed for select().
+ -- When Last_Socket_In_Set is called, parameter Last is a maximum value of
+ -- the largest socket. This hint is used to avoid scanning very large
+ -- socket sets. After the call, Last is set back to the real largest socket
+ -- in the socket set.
+
+ function New_Socket_Set
+ (Set : Fd_Set_Access) return Fd_Set_Access;
+ -- Allocate a new socket set which is a system-dependent structure and
+ -- initialize by copying Set if it is non-null, by making it empty
+ -- otherwise.
+
+ procedure Remove_Socket_From_Set
+ (Set : Fd_Set_Access;
+ Socket : C.int);
+ -- Remove socket from the socket set
+
+ procedure Initialize;
+ procedure Finalize;
+
+private
+ pragma Import (C, C_Bind, "bind");
+ pragma Import (C, C_Close, "close");
+ pragma Import (C, C_Gethostname, "gethostname");
+ pragma Import (C, C_Getpeername, "getpeername");
+ pragma Import (C, C_Getsockname, "getsockname");
+ pragma Import (C, C_Getsockopt, "getsockopt");
+ pragma Import (C, C_Inet_Addr, "inet_addr");
+ pragma Import (C, C_Listen, "listen");
+ pragma Import (C, C_Readv, "readv");
+ pragma Import (C, C_Select, "select");
+ pragma Import (C, C_Setsockopt, "setsockopt");
+ pragma Import (C, C_Shutdown, "shutdown");
+ pragma Import (C, C_Strerror, "strerror");
+ pragma Import (C, C_System, "system");
+ pragma Import (C, C_Writev, "writev");
+
+ pragma Import (C, Free_Socket_Set, "__gnat_free_socket_set");
+ pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set");
+ pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set");
+ pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set");
+ pragma Import (C, New_Socket_Set, "__gnat_new_socket_set");
+ pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set");
+ pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set");
+
+end GNAT.Sockets.Thin;