1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . S O C K E T S . T H I N --
9 -- Copyright (C) 2001-2004 Ada Core Technologies, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, 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 is the default version
40 with Interfaces.C.Pointers;
41 with Interfaces.C.Strings;
42 with GNAT.Sockets.Constants;
47 package GNAT.Sockets.Thin is
49 -- This package is intended for hosts implementing BSD sockets with a
50 -- standard interface. It will be used as a default for all the platforms
51 -- that do not have a specific version of this file.
53 package C renames Interfaces.C;
56 -- This is so we can declare the Failure constant below
58 Success : constant C.int := 0;
59 Failure : constant C.int := -1;
61 function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
62 -- Returns last socket error number.
64 function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
65 -- Returns the error message string for the error number Errno. If
66 -- Errno is not known it returns "Unknown system error".
68 subtype Fd_Set_Access is System.Address;
69 No_Fd_Set : constant Fd_Set_Access := System.Null_Address;
71 type Timeval_Unit is new C.int;
72 pragma Convention (C, Timeval_Unit);
74 type Timeval is record
75 Tv_Sec : Timeval_Unit;
76 Tv_Usec : Timeval_Unit;
78 pragma Convention (C, Timeval);
80 type Timeval_Access is access all Timeval;
81 pragma Convention (C, Timeval_Access);
83 Immediat : constant Timeval := (0, 0);
85 type Int_Access is access all C.int;
86 pragma Convention (C, Int_Access);
87 -- Access to C integers
89 type Chars_Ptr_Array is array (C.size_t range <>) of
90 aliased C.Strings.chars_ptr;
92 package Chars_Ptr_Pointers is
93 new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
95 -- Arrays of C (char *)
97 type In_Addr is record
98 S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
100 pragma Convention (C, In_Addr);
103 type In_Addr_Access is access all In_Addr;
104 pragma Convention (C, In_Addr_Access);
105 -- Access to internet address
107 Inaddr_Any : aliased constant In_Addr := (others => 0);
108 -- Any internet address (all the interfaces)
110 type In_Addr_Access_Array is array (C.size_t range <>)
111 of aliased In_Addr_Access;
112 pragma Convention (C, In_Addr_Access_Array);
114 package In_Addr_Access_Pointers is
115 new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
116 -- Array of internet addresses
118 type Sockaddr is record
119 Sa_Family : C.unsigned_short;
120 Sa_Data : C.char_array (1 .. 14);
122 pragma Convention (C, Sockaddr);
125 type Sockaddr_Access is access all Sockaddr;
126 pragma Convention (C, Sockaddr_Access);
127 -- Access to socket address
129 type Sockaddr_In is record
130 Sin_Family : C.unsigned_short := Constants.AF_INET;
131 Sin_Port : C.unsigned_short := 0;
132 Sin_Addr : In_Addr := Inaddr_Any;
133 Sin_Zero : C.char_array (1 .. 8) := (others => C.char'Val (0));
135 pragma Convention (C, Sockaddr_In);
136 -- Internet socket address
138 type Sockaddr_In_Access is access all Sockaddr_In;
139 pragma Convention (C, Sockaddr_In_Access);
140 -- Access to internet socket address
143 (Sin : Sockaddr_In_Access;
145 pragma Inline (Set_Length);
146 -- Set Sin.Sin_Length to Len.
147 -- On this platform, nothing is done as there is no such field.
150 (Sin : Sockaddr_In_Access;
152 pragma Inline (Set_Family);
153 -- Set Sin.Sin_Family to Family
156 (Sin : Sockaddr_In_Access;
157 Port : C.unsigned_short);
158 pragma Inline (Set_Port);
159 -- Set Sin.Sin_Port to Port
161 procedure Set_Address
162 (Sin : Sockaddr_In_Access;
164 pragma Inline (Set_Address);
165 -- Set Sin.Sin_Addr to Address
167 type Hostent is record
168 H_Name : C.Strings.chars_ptr;
169 H_Aliases : Chars_Ptr_Pointers.Pointer;
172 H_Addr_List : In_Addr_Access_Pointers.Pointer;
174 pragma Convention (C, Hostent);
177 type Hostent_Access is access all Hostent;
178 pragma Convention (C, Hostent_Access);
179 -- Access to host entry
181 type Servent is record
182 S_Name : C.Strings.chars_ptr;
183 S_Aliases : Chars_Ptr_Pointers.Pointer;
185 S_Proto : C.Strings.chars_ptr;
187 pragma Convention (C, Servent);
190 type Servent_Access is access all Servent;
191 pragma Convention (C, Servent_Access);
192 -- Access to service entry
194 type Two_Int is array (0 .. 1) of C.int;
195 pragma Convention (C, Two_Int);
200 Addr : System.Address;
201 Addrlen : access C.int) return C.int;
205 Name : System.Address;
206 Namelen : C.int) return C.int;
209 (Fd : C.int) return C.int;
213 Name : System.Address;
214 Namelen : C.int) return C.int;
216 function C_Gethostbyaddr
217 (Addr : System.Address;
219 Typ : C.int) return Hostent_Access;
221 function C_Gethostbyname
222 (Name : C.char_array) return Hostent_Access;
224 function C_Gethostname
225 (Name : System.Address;
226 Namelen : C.int) return C.int;
228 function C_Getpeername
230 Name : System.Address;
231 Namelen : access C.int) return C.int;
233 function C_Getservbyname
234 (Name : C.char_array;
235 Proto : C.char_array) return Servent_Access;
237 function C_Getservbyport
239 Proto : C.char_array) return Servent_Access;
241 function C_Getsockname
243 Name : System.Address;
244 Namelen : access C.int) return C.int;
246 function C_Getsockopt
250 Optval : System.Address;
251 Optlen : access C.int) return C.int;
254 (Cp : C.Strings.chars_ptr) return C.int;
259 Arg : Int_Access) return C.int;
263 Backlog : C.int) return C.int;
267 Iov : System.Address;
268 Iovcnt : C.int) return C.int;
272 Msg : System.Address;
274 Flags : C.int) return C.int;
278 Msg : System.Address;
281 From : Sockaddr_In_Access;
282 Fromlen : access C.int) return C.int;
286 Readfds : Fd_Set_Access;
287 Writefds : Fd_Set_Access;
288 Exceptfds : Fd_Set_Access;
289 Timeout : Timeval_Access) return C.int;
293 Msg : System.Address;
295 Flags : C.int) return C.int;
299 Msg : System.Address;
302 To : Sockaddr_In_Access;
303 Tolen : C.int) return C.int;
305 function C_Setsockopt
309 Optval : System.Address;
310 Optlen : C.int) return C.int;
314 How : C.int) return C.int;
319 Protocol : C.int) return C.int;
322 (Errnum : C.int) return C.Strings.chars_ptr;
325 (Command : System.Address) return C.int;
329 Iov : System.Address;
330 Iovcnt : C.int) return C.int;
332 procedure Free_Socket_Set
333 (Set : Fd_Set_Access);
334 -- Free system-dependent socket set
336 procedure Get_Socket_From_Set
337 (Set : Fd_Set_Access;
340 -- Get last socket in Socket and remove it from the socket
341 -- set. The parameter Last is a maximum value of the largest
342 -- socket. This hint is used to avoid scanning very large socket
343 -- sets. After a call to Get_Socket_From_Set, Last is set back to
344 -- the real largest socket in the socket set.
346 procedure Insert_Socket_In_Set
347 (Set : Fd_Set_Access;
349 -- Insert socket in the socket set
351 function Is_Socket_In_Set
352 (Set : Fd_Set_Access;
353 Socket : C.int) return C.int;
354 -- Check whether Socket is in the socket set, return a non-zero
355 -- value if it is, zero if it is not.
357 procedure Last_Socket_In_Set
358 (Set : Fd_Set_Access;
360 -- Find the largest socket in the socket set. This is needed for
361 -- select(). When Last_Socket_In_Set is called, parameter Last is
362 -- a maximum value of the largest socket. This hint is used to
363 -- avoid scanning very large socket sets. After the call, Last is
364 -- set back to the real largest socket in the socket set.
366 function New_Socket_Set
367 (Set : Fd_Set_Access) return Fd_Set_Access;
368 -- Allocate a new socket set which is a system-dependent structure
369 -- and initialize by copying Set if it is non-null, by making it
372 procedure Remove_Socket_From_Set
373 (Set : Fd_Set_Access;
375 -- Remove socket from the socket set
378 procedure Initialize (Process_Blocking_IO : Boolean);
381 pragma Import (C, C_Bind, "bind");
382 pragma Import (C, C_Close, "close");
383 pragma Import (C, C_Gethostbyaddr, "gethostbyaddr");
384 pragma Import (C, C_Gethostbyname, "gethostbyname");
385 pragma Import (C, C_Gethostname, "gethostname");
386 pragma Import (C, C_Getpeername, "getpeername");
387 pragma Import (C, C_Getservbyname, "getservbyname");
388 pragma Import (C, C_Getservbyport, "getservbyport");
389 pragma Import (C, C_Getsockname, "getsockname");
390 pragma Import (C, C_Getsockopt, "getsockopt");
391 pragma Import (C, C_Inet_Addr, "inet_addr");
392 pragma Import (C, C_Listen, "listen");
393 pragma Import (C, C_Readv, "readv");
394 pragma Import (C, C_Select, "select");
395 pragma Import (C, C_Setsockopt, "setsockopt");
396 pragma Import (C, C_Shutdown, "shutdown");
397 pragma Import (C, C_Strerror, "strerror");
398 pragma Import (C, C_System, "system");
399 pragma Import (C, C_Writev, "writev");
401 pragma Import (C, Free_Socket_Set, "__gnat_free_socket_set");
402 pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set");
403 pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set");
404 pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set");
405 pragma Import (C, New_Socket_Set, "__gnat_new_socket_set");
406 pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set");
407 pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set");
408 end GNAT.Sockets.Thin;