1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . S O C K E T S . T H I N . T A S K _ S A F E _ N E T D B --
-- --
-- B o d y --
-- --
-- Copyright (C) 2007-2008, 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 version is used on VxWorks. Note that the corresponding spec is in
-- g-sttsne-locking.ads.
with Ada.Unchecked_Conversion;
with Interfaces.C; use Interfaces.C;
package body GNAT.Sockets.Thin.Task_Safe_NetDB is
-- The following additional data is returned by Safe_Gethostbyname
-- and Safe_Getostbyaddr in the user provided buffer.
type Netdb_Host_Data (Name_Length : C.size_t) is record
Address : aliased In_Addr;
Addr_List : aliased In_Addr_Access_Array (0 .. 1);
Name : aliased C.char_array (0 .. Name_Length);
end record;
Alias_Access : constant Chars_Ptr_Pointers.Pointer :=
new C.Strings.chars_ptr'(C.Strings.Null_Ptr);
-- Constant used to create a Hostent record manually
------------------------
-- Safe_Gethostbyaddr --
------------------------
function Safe_Gethostbyaddr
(Addr : System.Address;
Addr_Len : C.int;
Addr_Type : C.int;
Ret : not null access Hostent;
Buf : System.Address;
Buflen : C.int;
H_Errnop : not null access C.int) return C.int
is
type int_Access is access int;
function To_Pointer is
new Ada.Unchecked_Conversion (System.Address, int_Access);
function VxWorks_hostGetByAddr
(Addr : C.int; Buf : System.Address) return C.int;
pragma Import (C, VxWorks_hostGetByAddr, "hostGetByAddr");
Netdb_Data : Netdb_Host_Data (Name_Length => Max_Name_Length);
pragma Import (Ada, Netdb_Data);
for Netdb_Data'Address use Buf;
pragma Unreferenced (H_Errnop);
-- VxWorks does not provide h_errno
begin
pragma Assert (Addr_Type = SOSC.AF_INET);
pragma Assert (Addr_Len = In_Addr'Size / 8);
-- Check that provided buffer is sufficiently large to hold the
-- data we want to return.
if Netdb_Data'Size / 8 > Buflen then
return -1;
end if;
if VxWorks_hostGetByAddr (To_Pointer (Addr).all,
Netdb_Data.Name'Address)
/= SOSC.OK
then
return -1;
end if;
Netdb_Data.Address := To_In_Addr (To_Pointer (Addr).all);
Netdb_Data.Addr_List :=
(0 => Netdb_Data.Address'Unchecked_Access,
1 => null);
Ret.H_Name := C.Strings.To_Chars_Ptr
(Netdb_Data.Name'Unrestricted_Access);
Ret.H_Aliases := Alias_Access;
Ret.H_Addrtype := SOSC.AF_INET;
Ret.H_Length := 4;
Ret.H_Addr_List :=
Netdb_Data.Addr_List (Netdb_Data.Addr_List'First)'Unchecked_Access;
return 0;
end Safe_Gethostbyaddr;
------------------------
-- Safe_Gethostbyname --
------------------------
function Safe_Gethostbyname
(Name : C.char_array;
Ret : not null access Hostent;
Buf : System.Address;
Buflen : C.int;
H_Errnop : not null access C.int) return C.int
is
function VxWorks_hostGetByName
(Name : C.char_array) return C.int;
pragma Import (C, VxWorks_hostGetByName, "hostGetByName");
Addr : C.int;
pragma Unreferenced (H_Errnop);
-- VxWorks does not provide h_errno
begin
Addr := VxWorks_hostGetByName (Name);
if Addr = SOSC.ERROR then
return -1;
end if;
declare
Netdb_Data : Netdb_Host_Data (Name_Length => Name'Length);
pragma Import (Ada, Netdb_Data);
for Netdb_Data'Address use Buf;
begin
-- Check that provided buffer is sufficiently large to hold the
-- data we want to return.
if Netdb_Data'Size / 8 > Buflen then
return -1;
end if;
Netdb_Data.Address := To_In_Addr (Addr);
Netdb_Data.Addr_List :=
(0 => Netdb_Data.Address'Unchecked_Access,
1 => null);
Netdb_Data.Name (Netdb_Data.Name'First .. Name'Length - 1) := Name;
Ret.H_Name := C.Strings.To_Chars_Ptr
(Netdb_Data.Name'Unrestricted_Access);
Ret.H_Aliases := Alias_Access;
Ret.H_Addrtype := SOSC.AF_INET;
Ret.H_Length := 4;
Ret.H_Addr_List :=
Netdb_Data.Addr_List (Netdb_Data.Addr_List'First)'Unchecked_Access;
end;
return 0;
end Safe_Gethostbyname;
------------------------
-- Safe_Getservbyname --
------------------------
function Safe_Getservbyname
(Name : C.char_array;
Proto : C.char_array;
Ret : not null access Servent;
Buf : System.Address;
Buflen : C.int) return C.int
is
pragma Unreferenced (Name, Proto, Ret, Buf, Buflen);
begin
-- Not available under VxWorks
return -1;
end Safe_Getservbyname;
------------------------
-- Safe_Getservbyport --
------------------------
function Safe_Getservbyport
(Port : C.int;
Proto : C.char_array;
Ret : not null access Servent;
Buf : System.Address;
Buflen : C.int) return C.int
is
pragma Unreferenced (Port, Proto, Ret, Buf, Buflen);
begin
-- Not available under VxWorks
return -1;
end Safe_Getservbyport;
end GNAT.Sockets.Thin.Task_Safe_NetDB;
|
