------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G N A T . S O C K E T S . T H I N -- -- -- -- S p e c -- -- -- -- Copyright (C) 2001-2009, 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 default version with Interfaces.C.Strings; with GNAT.OS_Lib; with GNAT.Sockets.Thin_Common; with System; package GNAT.Sockets.Thin is -- 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. use Thin_Common; package C renames Interfaces.C; use type C.size_t; type ssize_t is range -(2 ** (C.size_t'Size - 1)) .. +(2 ** (C.size_t'Size - 1) - 1); -- Signed type of the same size as size_t function Socket_Errno return Integer renames GNAT.OS_Lib.Errno; -- 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 : 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 Socket_Ioctl (S : C.int; Req : C.int; Arg : access 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; function C_Recvfrom (S : C.int; Msg : System.Address; Len : C.int; Flags : 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 ssize_t; function C_Select (Nfds : C.int; Readfds : access Fd_Set; Writefds : access Fd_Set; Exceptfds : access Fd_Set; Timeout : Timeval_Access) return C.int; function C_Sendmsg (S : C.int; Msg : System.Address; Flags : C.int) return ssize_t; function C_Sendto (S : C.int; Msg : System.Address; Len : C.int; Flags : 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; 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; ------------------------------------------------------- -- 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; ------------------------------------------- -- 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; 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_Listen, "listen"); 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, 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;