1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . S O C K E T S . T H I N --
9 -- Copyright (C) 2001-2005 AdaCore --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package provides a target dependent thin interface to the sockets
35 -- layer for use by the GNAT.Sockets package (g-socket.ads). This package
36 -- should not be directly with'ed by an applications program.
38 -- This version is for NT
40 with GNAT
.Sockets
.Constants
; use GNAT
.Sockets
.Constants
;
41 with Interfaces
.C
.Strings
; use Interfaces
.C
.Strings
;
43 with System
; use System
;
45 package body GNAT
.Sockets
.Thin
is
49 WSAData_Dummy
: array (1 .. 512) of C
.int
;
51 WS_Version
: constant := 16#
0101#
;
52 Initialized
: Boolean := False;
54 SYSNOTREADY
: constant := 10091;
55 VERNOTSUPPORTED
: constant := 10092;
56 NOTINITIALISED
: constant := 10093;
57 EDISCON
: constant := 10101;
59 function Standard_Connect
61 Name
: System
.Address
;
64 pragma Import
(Stdcall
, Standard_Connect
, "connect");
66 function Standard_Select
68 Readfds
: Fd_Set_Access
;
69 Writefds
: Fd_Set_Access
;
70 Exceptfds
: Fd_Set_Access
;
71 Timeout
: Timeval_Access
)
73 pragma Import
(Stdcall
, Standard_Select
, "select");
123 Error_Messages
: constant array (Error_Type
) of chars_ptr
:=
125 New_String
("Interrupted system call"),
127 New_String
("Bad file number"),
129 New_String
("Permission denied"),
131 New_String
("Bad address"),
133 New_String
("Invalid argument"),
135 New_String
("Too many open files"),
137 New_String
("Operation would block"),
139 New_String
("Operation now in progress. This error is "
140 & "returned if any Windows Sockets API "
141 & "function is called while a blocking "
142 & "function is in progress"),
144 New_String
("Operation already in progress"),
146 New_String
("Socket operation on nonsocket"),
148 New_String
("Destination address required"),
150 New_String
("Message too long"),
152 New_String
("Protocol wrong type for socket"),
154 New_String
("Protocol not available"),
156 New_String
("Protocol not supported"),
158 New_String
("Socket type not supported"),
160 New_String
("Operation not supported on socket"),
162 New_String
("Protocol family not supported"),
164 New_String
("Address family not supported by protocol family"),
166 New_String
("Address already in use"),
168 New_String
("Cannot assign requested address"),
170 New_String
("Network is down. This error may be "
171 & "reported at any time if the Windows "
172 & "Sockets implementation detects an "
173 & "underlying failure"),
175 New_String
("Network is unreachable"),
177 New_String
("Network dropped connection on reset"),
179 New_String
("Software caused connection abort"),
181 New_String
("Connection reset by peer"),
183 New_String
("No buffer space available"),
185 New_String
("Socket is already connected"),
187 New_String
("Socket is not connected"),
189 New_String
("Cannot send after socket shutdown"),
191 New_String
("Too many references: cannot splice"),
193 New_String
("Connection timed out"),
195 New_String
("Connection refused"),
197 New_String
("Too many levels of symbolic links"),
199 New_String
("File name too long"),
201 New_String
("Host is down"),
203 New_String
("No route to host"),
205 New_String
("Returned by WSAStartup(), indicating that "
206 & "the network subsystem is unusable"),
208 New_String
("Returned by WSAStartup(), indicating that "
209 & "the Windows Sockets DLL cannot support "
210 & "this application"),
212 New_String
("Winsock not initialized. This message is "
213 & "returned by any function except WSAStartup(), "
214 & "indicating that a successful WSAStartup() has "
215 & "not yet been performed"),
217 New_String
("Disconnect"),
219 New_String
("Host not found. This message indicates "
220 & "that the key (name, address, and so on) was not found"),
222 New_String
("Nonauthoritative host not found. This error may "
223 & "suggest that the name service itself is not "
226 New_String
("Nonrecoverable error. This error may suggest that the "
227 & "name service itself is not functioning"),
229 New_String
("Valid name, no data record of requested type. "
230 & "This error indicates that the key (name, address, "
231 & "and so on) was not found."),
233 New_String
("Unknown system error"));
241 Name
: System
.Address
;
248 Res
:= Standard_Connect
(S
, Name
, Namelen
);
251 if Socket_Errno
= EWOULDBLOCK
then
252 Set_Socket_Errno
(EINPROGRESS
);
265 Iov
: System
.Address
;
272 Iovec
: array (0 .. Iovcnt
- 1) of Vector_Element
;
273 for Iovec
'Address use Iov
;
274 pragma Import
(Ada
, Iovec
);
277 for J
in Iovec
'Range loop
280 Iovec
(J
).Base
.all'Address,
281 C
.int
(Iovec
(J
).Length
),
287 Count
:= Count
+ Res
;
299 Readfds
: Fd_Set_Access
;
300 Writefds
: Fd_Set_Access
;
301 Exceptfds
: Fd_Set_Access
;
302 Timeout
: Timeval_Access
)
305 pragma Warnings
(Off
, Exceptfds
);
307 RFS
: constant Fd_Set_Access
:= Readfds
;
308 WFS
: constant Fd_Set_Access
:= Writefds
;
309 WFSC
: Fd_Set_Access
:= No_Fd_Set
;
310 EFS
: Fd_Set_Access
:= Exceptfds
;
313 Last
: aliased C
.int
;
316 -- Asynchronous connection failures are notified in the
317 -- exception fd set instead of the write fd set. To ensure
318 -- POSIX compatitibility, copy write fd set into exception fd
319 -- set. Once select() returns, check any socket present in the
320 -- exception fd set and peek at incoming out-of-band data. If
321 -- the test is not successful, and the socket is present in
322 -- the initial write fd set, then move the socket from the
323 -- exception fd set to the write fd set.
325 if WFS
/= No_Fd_Set
then
326 -- Add any socket present in write fd set into exception fd set
328 if EFS
= No_Fd_Set
then
329 EFS
:= New_Socket_Set
(WFS
);
332 WFSC
:= New_Socket_Set
(WFS
);
337 (WFSC
, S
'Unchecked_Access, Last
'Unchecked_Access);
339 Insert_Socket_In_Set
(EFS
, S
);
342 Free_Socket_Set
(WFSC
);
345 -- Keep a copy of write fd set
347 WFSC
:= New_Socket_Set
(WFS
);
350 Res
:= Standard_Select
(Nfds
, RFS
, WFS
, EFS
, Timeout
);
352 if EFS
/= No_Fd_Set
then
354 EFSC
: constant Fd_Set_Access
:= New_Socket_Set
(EFS
);
355 Flag
: constant C
.int
:= MSG_PEEK
+ MSG_OOB
;
358 Fromlen
: aliased C
.int
;
364 (EFSC
, S
'Unchecked_Access, Last
'Unchecked_Access);
366 -- No more sockets in EFSC
370 -- Check out-of-band data
373 (S
, Buffer
'Address, 1, Flag
,
374 null, Fromlen
'Unchecked_Access);
376 -- If the signal is not an out-of-band data, then it
377 -- is a connection failure notification.
380 Remove_Socket_From_Set
(EFS
, S
);
382 -- If S is present in the initial write fd set,
383 -- move it from exception fd set back to write fd
384 -- set. Otherwise, ignore this event since the user
385 -- is not watching for it.
388 and then (Is_Socket_In_Set
(WFSC
, S
) /= 0)
390 Insert_Socket_In_Set
(WFS
, S
);
395 Free_Socket_Set
(EFSC
);
398 if Exceptfds
= No_Fd_Set
then
399 Free_Socket_Set
(EFS
);
403 -- Free any copy of write fd set
405 if WFSC
/= No_Fd_Set
then
406 Free_Socket_Set
(WFSC
);
417 (Cp
: C
.Strings
.chars_ptr
) return C
.int
419 use type C
.unsigned_long
;
421 function Internal_Inet_Addr
422 (Cp
: C
.Strings
.chars_ptr
) return C
.unsigned_long
;
423 pragma Import
(Stdcall
, Internal_Inet_Addr
, "inet_addr");
425 Res
: C
.unsigned_long
;
427 Res
:= Internal_Inet_Addr
(Cp
);
429 if Res
= C
.unsigned_long
'Last then
430 -- This value is returned in case of error
433 return C
.int
(Internal_Inet_Addr
(Cp
));
443 Iov
: System
.Address
;
450 Iovec
: array (0 .. Iovcnt
- 1) of Vector_Element
;
451 for Iovec
'Address use Iov
;
452 pragma Import
(Ada
, Iovec
);
455 for J
in Iovec
'Range loop
458 Iovec
(J
).Base
.all'Address,
459 C
.int
(Iovec
(J
).Length
),
465 Count
:= Count
+ Res
;
475 procedure Finalize
is
479 Initialized
:= False;
487 procedure Initialize
(Process_Blocking_IO
: Boolean := False) is
488 pragma Unreferenced
(Process_Blocking_IO
);
490 Return_Value
: Interfaces
.C
.int
;
493 if not Initialized
then
494 Return_Value
:= WSAStartup
(WS_Version
, WSAData_Dummy
'Address);
495 pragma Assert
(Interfaces
.C
."=" (Return_Value
, 0));
504 procedure Set_Address
505 (Sin
: Sockaddr_In_Access
;
509 Sin
.Sin_Addr
:= Address
;
517 (Sin
: Sockaddr_In_Access
;
521 Sin
.Sin_Family
:= C
.unsigned_short
(Family
);
529 (Sin
: Sockaddr_In_Access
;
532 pragma Unreferenced
(Sin
);
533 pragma Unreferenced
(Len
);
544 (Sin
: Sockaddr_In_Access
;
545 Port
: C
.unsigned_short
)
548 Sin
.Sin_Port
:= Port
;
551 --------------------------
552 -- Socket_Error_Message --
553 --------------------------
555 function Socket_Error_Message
557 return C
.Strings
.chars_ptr
559 use GNAT
.Sockets
.Constants
;
563 when EINTR
=> return Error_Messages
(N_EINTR
);
564 when EBADF
=> return Error_Messages
(N_EBADF
);
565 when EACCES
=> return Error_Messages
(N_EACCES
);
566 when EFAULT
=> return Error_Messages
(N_EFAULT
);
567 when EINVAL
=> return Error_Messages
(N_EINVAL
);
568 when EMFILE
=> return Error_Messages
(N_EMFILE
);
569 when EWOULDBLOCK
=> return Error_Messages
(N_EWOULDBLOCK
);
570 when EINPROGRESS
=> return Error_Messages
(N_EINPROGRESS
);
571 when EALREADY
=> return Error_Messages
(N_EALREADY
);
572 when ENOTSOCK
=> return Error_Messages
(N_ENOTSOCK
);
573 when EDESTADDRREQ
=> return Error_Messages
(N_EDESTADDRREQ
);
574 when EMSGSIZE
=> return Error_Messages
(N_EMSGSIZE
);
575 when EPROTOTYPE
=> return Error_Messages
(N_EPROTOTYPE
);
576 when ENOPROTOOPT
=> return Error_Messages
(N_ENOPROTOOPT
);
577 when EPROTONOSUPPORT
=> return Error_Messages
(N_EPROTONOSUPPORT
);
578 when ESOCKTNOSUPPORT
=> return Error_Messages
(N_ESOCKTNOSUPPORT
);
579 when EOPNOTSUPP
=> return Error_Messages
(N_EOPNOTSUPP
);
580 when EPFNOSUPPORT
=> return Error_Messages
(N_EPFNOSUPPORT
);
581 when EAFNOSUPPORT
=> return Error_Messages
(N_EAFNOSUPPORT
);
582 when EADDRINUSE
=> return Error_Messages
(N_EADDRINUSE
);
583 when EADDRNOTAVAIL
=> return Error_Messages
(N_EADDRNOTAVAIL
);
584 when ENETDOWN
=> return Error_Messages
(N_ENETDOWN
);
585 when ENETUNREACH
=> return Error_Messages
(N_ENETUNREACH
);
586 when ENETRESET
=> return Error_Messages
(N_ENETRESET
);
587 when ECONNABORTED
=> return Error_Messages
(N_ECONNABORTED
);
588 when ECONNRESET
=> return Error_Messages
(N_ECONNRESET
);
589 when ENOBUFS
=> return Error_Messages
(N_ENOBUFS
);
590 when EISCONN
=> return Error_Messages
(N_EISCONN
);
591 when ENOTCONN
=> return Error_Messages
(N_ENOTCONN
);
592 when ESHUTDOWN
=> return Error_Messages
(N_ESHUTDOWN
);
593 when ETOOMANYREFS
=> return Error_Messages
(N_ETOOMANYREFS
);
594 when ETIMEDOUT
=> return Error_Messages
(N_ETIMEDOUT
);
595 when ECONNREFUSED
=> return Error_Messages
(N_ECONNREFUSED
);
596 when ELOOP
=> return Error_Messages
(N_ELOOP
);
597 when ENAMETOOLONG
=> return Error_Messages
(N_ENAMETOOLONG
);
598 when EHOSTDOWN
=> return Error_Messages
(N_EHOSTDOWN
);
599 when EHOSTUNREACH
=> return Error_Messages
(N_EHOSTUNREACH
);
600 when SYSNOTREADY
=> return Error_Messages
(N_SYSNOTREADY
);
601 when VERNOTSUPPORTED
=> return Error_Messages
(N_VERNOTSUPPORTED
);
602 when NOTINITIALISED
=> return Error_Messages
(N_NOTINITIALISED
);
603 when EDISCON
=> return Error_Messages
(N_EDISCON
);
604 when HOST_NOT_FOUND
=> return Error_Messages
(N_HOST_NOT_FOUND
);
605 when TRY_AGAIN
=> return Error_Messages
(N_TRY_AGAIN
);
606 when NO_RECOVERY
=> return Error_Messages
(N_NO_RECOVERY
);
607 when NO_DATA
=> return Error_Messages
(N_NO_DATA
);
608 when others => return Error_Messages
(N_OTHERS
);
610 end Socket_Error_Message
;
612 end GNAT
.Sockets
.Thin
;