-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 2001 Ada Core Technologies, Inc. --
+-- Copyright (C) 2001-2010, 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- --
+-- ware Foundation; either version 3, 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
-- --
--- 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. --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
--- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-with Interfaces.C.Pointers;
+-- 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 default version
with Interfaces.C.Strings;
-with GNAT.Sockets.Constants;
+
with GNAT.OS_Lib;
+with GNAT.Sockets.Thin_Common;
with System;
+with System.CRTL;
package GNAT.Sockets.Thin is
- -- ??? more comments needed ???
-
-- This package is intended for hosts implementing BSD sockets with a
-- standard interface. It will be used as a default for all the platforms
-- that do not have a specific version of this file.
- package C renames Interfaces.C;
+ use Thin_Common;
- use type C.int;
- -- This is so we can declare the Failure constant below
+ package C renames Interfaces.C;
- Success : constant C.int := 0;
- Failure : constant C.int := -1;
+ use type System.CRTL.ssize_t;
function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
- -- Returns last socket error number.
-
- function Socket_Error_Message (Errno : Integer) return String;
- -- Returns the error message string for the error number Errno. If
- -- Errno is not known it returns "Unknown system error".
-
- type Fd_Set is mod 2 ** 32;
- pragma Convention (C, Fd_Set);
-
- Null_Fd_Set : constant Fd_Set := 0;
-
- type Fd_Set_Access is access all Fd_Set;
- pragma Convention (C, Fd_Set_Access);
-
- type Timeval_Unit is new C.int;
- pragma Convention (C, Timeval_Unit);
-
- type Timeval is record
- Tv_Sec : Timeval_Unit;
- Tv_Usec : Timeval_Unit;
- 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;
- pragma Convention (C, In_Addr);
- -- Internet address
-
- 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_Family : C.unsigned_short;
- 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_Family : C.unsigned_short := 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
-
- 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 Two_Int is array (0 .. 1) of C.int;
- pragma Convention (C, Two_Int);
- -- Used with pipe()
+ -- Returns 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;
+
+ --------------------------------
+ -- Standard library functions --
+ --------------------------------
function C_Accept
(S : C.int;
Addr : System.Address;
- Addrlen : access C.int)
- return C.int;
+ Addrlen : not null access C.int) return C.int;
function C_Bind
(S : C.int;
Name : System.Address;
- Namelen : C.int)
- return C.int;
+ Namelen : C.int) return C.int;
function C_Close
- (Fd : C.int)
- return C.int;
+ (Fd : C.int) return C.int;
function C_Connect
(S : C.int;
Name : System.Address;
- Namelen : C.int)
- return C.int;
-
- function C_Gethostbyaddr
- (Addr : System.Address;
- Len : C.int;
- Typ : C.int)
- return Hostent_Access;
-
- function C_Gethostbyname
- (Name : C.char_array)
- return Hostent_Access;
+ Namelen : C.int) return C.int;
function C_Gethostname
(Name : System.Address;
- Namelen : C.int)
- return C.int;
+ Namelen : C.int) return C.int;
function C_Getpeername
(S : C.int;
Name : System.Address;
- Namelen : access C.int)
- return C.int;
+ Namelen : not null access C.int) return C.int;
function C_Getsockname
(S : C.int;
Name : System.Address;
- Namelen : access C.int)
- return C.int;
+ 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 : access C.int)
- return C.int;
-
- function C_Inet_Addr
- (Cp : C.Strings.chars_ptr)
- return C.int;
+ Optlen : not null access C.int) return C.int;
- function C_Ioctl
- (S : C.int;
- Req : C.int;
- Arg : Int_Access)
- return C.int;
+ function Socket_Ioctl
+ (S : C.int;
+ Req : C.int;
+ Arg : access C.int) return C.int;
- function C_Listen (S, Backlog : C.int) return C.int;
-
- function C_Read
- (Fd : C.int;
- Buf : System.Address;
- Count : C.int)
- return C.int;
+ function C_Listen
+ (S : C.int;
+ Backlog : C.int) return C.int;
function C_Recv
(S : C.int;
Msg : System.Address;
Len : C.int;
- Flags : C.int)
- return 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 : access C.int)
- return C.int;
+ From : System.Address;
+ Fromlen : not null access C.int) return C.int;
+
+ function C_Recvmsg
+ (S : C.int;
+ Msg : System.Address;
+ Flags : C.int) return System.CRTL.ssize_t;
function C_Select
(Nfds : C.int;
- Readfds : Fd_Set_Access;
- Writefds : Fd_Set_Access;
- Exceptfds : Fd_Set_Access;
- Timeout : Timeval_Access)
- return C.int;
+ Readfds : access Fd_Set;
+ Writefds : access Fd_Set;
+ Exceptfds : access Fd_Set;
+ Timeout : Timeval_Access) return C.int;
- function C_Send
+ function C_Sendmsg
(S : C.int;
Msg : System.Address;
- Len : C.int;
- Flags : C.int)
- return C.int;
+ Flags : C.int) return System.CRTL.ssize_t;
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;
+ To : System.Address;
+ 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;
+ Optlen : C.int) return C.int;
function C_Shutdown
- (S : C.int;
- How : C.int)
- return C.int;
+ (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;
+ Protocol : C.int) return C.int;
function C_System
- (Command : System.Address)
- return C.int;
+ (Command : System.Address) 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 C_Write
- (Fd : C.int;
- Buf : System.Address;
- Count : C.int)
- return C.int;
+ 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.
- -- Return highest numbered socket (what does this refer to???)
+ procedure Close (Sig : C.int);
+ pragma Convention (C, Close);
+ -- Close one end of a pair of signalling fds (ignoring any error)
- procedure Clear (Item : in out Fd_Set; Socket : in C.int);
- procedure Empty (Item : in out Fd_Set);
- function Is_Empty (Item : Fd_Set) return Boolean;
- function Is_Set (Item : Fd_Set; Socket : C.int) return Boolean;
- function Max (Item : Fd_Set) return C.int;
- procedure Set (Item : in out Fd_Set; Socket : in C.int);
+ end Signalling_Fds;
+ -------------------------------------------
+ -- Nonreentrant network databases access --
+ -------------------------------------------
+
+ -- The following are used only on systems that have nonreentrant
+ -- getXXXbyYYY functions, and do NOT have corresponding getXXXbyYYY_
+ -- functions. Currently, LynxOS is the only such system.
+
+ function Nonreentrant_Gethostbyname
+ (Name : C.char_array) return Hostent_Access;
+
+ function Nonreentrant_Gethostbyaddr
+ (Addr : System.Address;
+ Addr_Len : C.int;
+ Addr_Type : C.int) return Hostent_Access;
+
+ function Nonreentrant_Getservbyname
+ (Name : C.char_array;
+ Proto : C.char_array) return Servent_Access;
+
+ function Nonreentrant_Getservbyport
+ (Port : C.int;
+ Proto : C.char_array) return Servent_Access;
+
+ procedure Initialize;
procedure Finalize;
- procedure Initialize (Process_Blocking_IO : Boolean);
private
-
pragma Import (C, C_Bind, "bind");
pragma Import (C, C_Close, "close");
- pragma Import (C, C_Gethostbyaddr, "gethostbyaddr");
- pragma Import (C, C_Gethostbyname, "gethostbyname");
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_Read, "read");
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_Write, "write");
+
+ pragma Import (C, Nonreentrant_Gethostbyname, "gethostbyname");
+ pragma Import (C, Nonreentrant_Gethostbyaddr, "gethostbyaddr");
+ pragma Import (C, Nonreentrant_Getservbyname, "getservbyname");
+ pragma Import (C, Nonreentrant_Getservbyport, "getservbyport");
end GNAT.Sockets.Thin;
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