1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . S O C K E T S . T H I N --
9 -- Copyright (C) 2001-2006, 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 Interfaces.C.Pointers;
41 with Interfaces.C.Strings;
43 with GNAT.Sockets.Constants;
47 package GNAT.Sockets.Thin is
49 package C renames Interfaces.C;
52 -- So that we can declare the Failure constant below
54 Success : constant C.int := 0;
55 Failure : constant C.int := -1;
57 function Socket_Errno return Integer;
58 -- Returns last socket error number
60 procedure Set_Socket_Errno (Errno : Integer);
61 -- Set last socket error number
63 function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
64 -- Returns the error message string for the error number Errno. If Errno is
65 -- not known it returns "Unknown system error".
67 function Host_Errno return Integer;
68 pragma Import (C, Host_Errno, "__gnat_get_h_errno");
69 -- Returns last host error number
71 subtype Fd_Set_Access is System.Address;
72 No_Fd_Set : constant Fd_Set_Access := System.Null_Address;
75 range -2 ** (8 * Constants.SIZEOF_tv_sec - 1)
76 .. 2 ** (8 * Constants.SIZEOF_tv_sec - 1) - 1;
77 for time_t'Size use 8 * Constants.SIZEOF_tv_sec;
78 pragma Convention (C, time_t);
81 range -2 ** (8 * Constants.SIZEOF_tv_usec - 1)
82 .. 2 ** (8 * Constants.SIZEOF_tv_usec - 1) - 1;
83 for suseconds_t'Size use 8 * Constants.SIZEOF_tv_usec;
84 pragma Convention (C, suseconds_t);
86 type Timeval is record
88 Tv_Usec : suseconds_t;
90 pragma Convention (C, Timeval);
92 type Timeval_Access is access all Timeval;
93 pragma Convention (C, Timeval_Access);
95 Immediat : constant Timeval := (0, 0);
97 type Int_Access is access all C.int;
98 pragma Convention (C, Int_Access);
99 -- Access to C integers
101 type Chars_Ptr_Array is array (C.size_t range <>) of
102 aliased C.Strings.chars_ptr;
104 package Chars_Ptr_Pointers is
105 new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
107 -- Arrays of C (char *)
109 type In_Addr is record
110 S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
112 pragma Convention (C, In_Addr);
115 type In_Addr_Access is access all In_Addr;
116 pragma Convention (C, In_Addr_Access);
117 -- Access to internet address
119 Inaddr_Any : aliased constant In_Addr := (others => 0);
120 -- Any internet address (all the interfaces)
122 type In_Addr_Access_Array is array (C.size_t range <>)
123 of aliased In_Addr_Access;
124 pragma Convention (C, In_Addr_Access_Array);
126 package In_Addr_Access_Pointers is
127 new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
128 -- Array of internet addresses
130 type Sockaddr is record
131 Sa_Family : C.unsigned_short;
132 Sa_Data : C.char_array (1 .. 14);
134 pragma Convention (C, Sockaddr);
137 type Sockaddr_Access is access all Sockaddr;
138 pragma Convention (C, Sockaddr_Access);
139 -- Access to socket address
141 type Sockaddr_In is record
142 Sin_Family : C.unsigned_short := Constants.AF_INET;
143 Sin_Port : C.unsigned_short := 0;
144 Sin_Addr : In_Addr := Inaddr_Any;
145 Sin_Zero : C.char_array (1 .. 8) := (others => C.char'Val (0));
147 pragma Convention (C, Sockaddr_In);
148 -- Internet socket address
150 type Sockaddr_In_Access is access all Sockaddr_In;
151 pragma Convention (C, Sockaddr_In_Access);
152 -- Access to internet socket address
155 (Sin : Sockaddr_In_Access;
157 pragma Inline (Set_Length);
158 -- Set Sin.Sin_Length to Len.
159 -- On this platform, nothing is done as there is no such field.
162 (Sin : Sockaddr_In_Access;
164 pragma Inline (Set_Family);
165 -- Set Sin.Sin_Family to Family
168 (Sin : Sockaddr_In_Access;
169 Port : C.unsigned_short);
170 pragma Inline (Set_Port);
171 -- Set Sin.Sin_Port to Port
173 procedure Set_Address
174 (Sin : Sockaddr_In_Access;
176 pragma Inline (Set_Address);
177 -- Set Sin.Sin_Addr to Address
179 type Hostent is record
180 H_Name : C.Strings.chars_ptr;
181 H_Aliases : Chars_Ptr_Pointers.Pointer;
182 H_Addrtype : C.short;
184 H_Addr_List : In_Addr_Access_Pointers.Pointer;
186 pragma Convention (C, Hostent);
189 type Hostent_Access is access all Hostent;
190 pragma Convention (C, Hostent_Access);
191 -- Access to host entry
193 type Servent is record
194 S_Name : C.Strings.chars_ptr;
195 S_Aliases : Chars_Ptr_Pointers.Pointer;
197 S_Proto : C.Strings.chars_ptr;
199 pragma Convention (C, Servent);
202 type Servent_Access is access all Servent;
203 pragma Convention (C, Servent_Access);
204 -- Access to service entry
206 type Two_Ints is array (0 .. 1) of C.int;
207 pragma Convention (C, Two_Ints);
208 -- Container for two int values
210 subtype Fd_Pair is Two_Ints;
211 -- Two_Ints as used for Create_Signalling_Fds: a pair of connected file
212 -- descriptors, one of which (the "read end" of the connection) being used
213 -- for reading, the other one (the "write end") being used for writing.
215 Read_End : constant := 0;
216 Write_End : constant := 1;
217 -- Indices into an Fd_Pair value providing access to each of the connected
222 Addr : System.Address;
223 Addrlen : not null access C.int) return C.int;
227 Name : System.Address;
228 Namelen : C.int) return C.int;
231 (Fd : C.int) return C.int;
235 Name : System.Address;
236 Namelen : C.int) return C.int;
238 function C_Gethostbyaddr
239 (Addr : System.Address;
241 Typ : C.int) return Hostent_Access;
243 function C_Gethostbyname
244 (Name : C.char_array) return Hostent_Access;
246 function C_Gethostname
247 (Name : System.Address;
248 Namelen : C.int) return C.int;
250 function C_Getpeername
252 Name : System.Address;
253 Namelen : not null access C.int) return C.int;
255 function C_Getservbyname
256 (Name : C.char_array;
257 Proto : C.char_array) return Servent_Access;
259 function C_Getservbyport
261 Proto : C.char_array) return Servent_Access;
263 function C_Getsockname
265 Name : System.Address;
266 Namelen : not null access C.int) return C.int;
268 function C_Getsockopt
272 Optval : System.Address;
273 Optlen : not null access C.int) return C.int;
276 (Cp : C.Strings.chars_ptr) return C.int;
281 Arg : Int_Access) return C.int;
285 Backlog : C.int) return C.int;
289 Iov : System.Address;
290 Iovcnt : C.int) return C.int;
294 Msg : System.Address;
296 Flags : C.int) return C.int;
300 Msg : System.Address;
303 From : Sockaddr_In_Access;
304 Fromlen : not null access C.int) return C.int;
308 Readfds : Fd_Set_Access;
309 Writefds : Fd_Set_Access;
310 Exceptfds : Fd_Set_Access;
311 Timeout : Timeval_Access) return C.int;
315 Msg : System.Address;
317 Flags : C.int) return C.int;
321 Msg : System.Address;
324 To : Sockaddr_In_Access;
325 Tolen : C.int) return C.int;
327 function C_Setsockopt
331 Optval : System.Address;
332 Optlen : C.int) return C.int;
336 How : C.int) return C.int;
341 Protocol : C.int) return C.int;
344 (Errnum : C.int) return C.Strings.chars_ptr;
347 (Command : System.Address) return C.int;
351 Iov : System.Address;
352 Iovcnt : C.int) return C.int;
355 (WS_Version : Interfaces.C.int;
356 WSADataAddress : System.Address) return Interfaces.C.int;
358 package Signalling_Fds is
360 function Create (Fds : not null access Fd_Pair) return C.int;
361 pragma Convention (C, Create);
362 -- Create a pair of connected descriptors suitable for use with C_Select
363 -- (used for signalling in Selector objects).
365 function Read (Rsig : C.int) return C.int;
366 pragma Convention (C, Read);
367 -- Read one byte of data from rsig, the read end of a pair of signalling
368 -- fds created by Create_Signalling_Fds.
370 function Write (Wsig : C.int) return C.int;
371 pragma Convention (C, Write);
372 -- Write one byte of data to wsig, the write end of a pair of signalling
373 -- fds created by Create_Signalling_Fds.
377 procedure Free_Socket_Set
378 (Set : Fd_Set_Access);
379 -- Free system-dependent socket set
381 procedure Get_Socket_From_Set
382 (Set : Fd_Set_Access;
385 -- Get last socket in Socket and remove it from the socket
386 -- set. The parameter Last is a maximum value of the largest
387 -- socket. This hint is used to avoid scanning very large socket
388 -- sets. After a call to Get_Socket_From_Set, Last is set back to
389 -- the real largest socket in the socket set.
391 procedure Insert_Socket_In_Set
392 (Set : Fd_Set_Access;
394 -- Insert socket in the socket set
396 function Is_Socket_In_Set
397 (Set : Fd_Set_Access;
398 Socket : C.int) return C.int;
399 -- Check whether Socket is in the socket set, return a non-zero
400 -- value if it is, zero if it is not.
402 procedure Last_Socket_In_Set
403 (Set : Fd_Set_Access;
405 -- Find the largest socket in the socket set. This is needed for select().
406 -- When Last_Socket_In_Set is called, parameter Last is a maximum value of
407 -- the largest socket. This hint is used to avoid scanning very large
408 -- socket sets. After the call, Last is set back to the real largest socket
409 -- in the socket set.
411 function New_Socket_Set
412 (Set : Fd_Set_Access) return Fd_Set_Access;
413 -- Allocate a new socket set which is a system-dependent structure and
414 -- initialize by copying Set if it is non-null, by making it empty
417 procedure Remove_Socket_From_Set
418 (Set : Fd_Set_Access;
420 -- Remove socket from the socket set
422 procedure WSACleanup;
425 procedure Initialize (Process_Blocking_IO : Boolean);
428 pragma Import (Stdcall, C_Accept, "accept");
429 pragma Import (Stdcall, C_Bind, "bind");
430 pragma Import (Stdcall, C_Close, "closesocket");
431 pragma Import (Stdcall, C_Gethostbyaddr, "gethostbyaddr");
432 pragma Import (Stdcall, C_Gethostbyname, "gethostbyname");
433 pragma Import (Stdcall, C_Gethostname, "gethostname");
434 pragma Import (Stdcall, C_Getpeername, "getpeername");
435 pragma Import (Stdcall, C_Getservbyname, "getservbyname");
436 pragma Import (Stdcall, C_Getservbyport, "getservbyport");
437 pragma Import (Stdcall, C_Getsockname, "getsockname");
438 pragma Import (Stdcall, C_Getsockopt, "getsockopt");
439 pragma Import (Stdcall, C_Ioctl, "ioctlsocket");
440 pragma Import (Stdcall, C_Listen, "listen");
441 pragma Import (Stdcall, C_Recv, "recv");
442 pragma Import (Stdcall, C_Recvfrom, "recvfrom");
443 pragma Import (Stdcall, C_Send, "send");
444 pragma Import (Stdcall, C_Sendto, "sendto");
445 pragma Import (Stdcall, C_Setsockopt, "setsockopt");
446 pragma Import (Stdcall, C_Shutdown, "shutdown");
447 pragma Import (Stdcall, C_Socket, "socket");
448 pragma Import (C, C_Strerror, "strerror");
449 pragma Import (C, C_System, "_system");
450 pragma Import (Stdcall, Socket_Errno, "WSAGetLastError");
451 pragma Import (Stdcall, Set_Socket_Errno, "WSASetLastError");
452 pragma Import (Stdcall, WSAStartup, "WSAStartup");
453 pragma Import (Stdcall, WSACleanup, "WSACleanup");
455 pragma Import (C, Free_Socket_Set, "__gnat_free_socket_set");
456 pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set");
457 pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set");
458 pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set");
459 pragma Import (C, New_Socket_Set, "__gnat_new_socket_set");
460 pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set");
461 pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set");
463 end GNAT.Sockets.Thin;