1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . S O C K E T S --
9 -- Copyright (C) 2001-2005 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, 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 with Ada.Streams; use Ada.Streams;
35 with Ada.Exceptions; use Ada.Exceptions;
36 with Ada.Unchecked_Conversion;
38 with Interfaces.C.Strings;
40 with GNAT.Sockets.Constants;
41 with GNAT.Sockets.Thin; use GNAT.Sockets.Thin;
44 with GNAT.Sockets.Linker_Options;
45 pragma Warnings (Off, GNAT.Sockets.Linker_Options);
46 -- Need to include pragma Linker_Options which is platform dependent
48 with System; use System;
50 package body GNAT.Sockets is
52 use type C.int, System.Address;
54 Finalized : Boolean := False;
55 Initialized : Boolean := False;
57 ENOERROR : constant := 0;
59 -- Correspondance tables
61 Families : constant array (Family_Type) of C.int :=
62 (Family_Inet => Constants.AF_INET,
63 Family_Inet6 => Constants.AF_INET6);
65 Levels : constant array (Level_Type) of C.int :=
66 (Socket_Level => Constants.SOL_SOCKET,
67 IP_Protocol_For_IP_Level => Constants.IPPROTO_IP,
68 IP_Protocol_For_UDP_Level => Constants.IPPROTO_UDP,
69 IP_Protocol_For_TCP_Level => Constants.IPPROTO_TCP);
71 Modes : constant array (Mode_Type) of C.int :=
72 (Socket_Stream => Constants.SOCK_STREAM,
73 Socket_Datagram => Constants.SOCK_DGRAM);
75 Shutmodes : constant array (Shutmode_Type) of C.int :=
76 (Shut_Read => Constants.SHUT_RD,
77 Shut_Write => Constants.SHUT_WR,
78 Shut_Read_Write => Constants.SHUT_RDWR);
80 Requests : constant array (Request_Name) of C.int :=
81 (Non_Blocking_IO => Constants.FIONBIO,
82 N_Bytes_To_Read => Constants.FIONREAD);
84 Options : constant array (Option_Name) of C.int :=
85 (Keep_Alive => Constants.SO_KEEPALIVE,
86 Reuse_Address => Constants.SO_REUSEADDR,
87 Broadcast => Constants.SO_BROADCAST,
88 Send_Buffer => Constants.SO_SNDBUF,
89 Receive_Buffer => Constants.SO_RCVBUF,
90 Linger => Constants.SO_LINGER,
91 Error => Constants.SO_ERROR,
92 No_Delay => Constants.TCP_NODELAY,
93 Add_Membership => Constants.IP_ADD_MEMBERSHIP,
94 Drop_Membership => Constants.IP_DROP_MEMBERSHIP,
95 Multicast_TTL => Constants.IP_MULTICAST_TTL,
96 Multicast_Loop => Constants.IP_MULTICAST_LOOP);
98 Flags : constant array (0 .. 3) of C.int :=
99 (0 => Constants.MSG_OOB, -- Process_Out_Of_Band_Data
100 1 => Constants.MSG_PEEK, -- Peek_At_Incoming_Data
101 2 => Constants.MSG_WAITALL, -- Wait_For_A_Full_Reception
102 3 => Constants.MSG_EOR); -- Send_End_Of_Record
104 Socket_Error_Id : constant Exception_Id := Socket_Error'Identity;
105 Host_Error_Id : constant Exception_Id := Host_Error'Identity;
107 Hex_To_Char : constant String (1 .. 16) := "0123456789ABCDEF";
108 -- Use to print in hexadecimal format
110 function To_In_Addr is new Ada.Unchecked_Conversion (C.int, In_Addr);
111 function To_Int is new Ada.Unchecked_Conversion (In_Addr, C.int);
113 -----------------------
114 -- Local subprograms --
115 -----------------------
117 function Resolve_Error
118 (Error_Value : Integer;
119 From_Errno : Boolean := True) return Error_Type;
120 -- Associate an enumeration value (error_type) to en error value
121 -- (errno). From_Errno prevents from mixing h_errno with errno.
123 function To_Name (N : String) return Name_Type;
124 function To_String (HN : Name_Type) return String;
125 -- Conversion functions
127 function To_Int (F : Request_Flag_Type) return C.int;
128 -- Return the int value corresponding to the specified flags combination
130 function Set_Forced_Flags (F : C.int) return C.int;
131 -- Return F with the bits from Constants.MSG_Forced_Flags forced set
133 function Short_To_Network
134 (S : C.unsigned_short) return C.unsigned_short;
135 pragma Inline (Short_To_Network);
136 -- Convert a port number into a network port number
138 function Network_To_Short
139 (S : C.unsigned_short) return C.unsigned_short
140 renames Short_To_Network;
141 -- Symetric operation
144 (Val : Inet_Addr_VN_Type;
145 Hex : Boolean := False) return String;
146 -- Output an array of inet address components either in
147 -- hexadecimal or in decimal mode.
149 function Is_IP_Address (Name : String) return Boolean;
150 -- Return true when Name is an IP address in standard dot notation.
152 function To_In_Addr (Addr : Inet_Addr_Type) return Thin.In_Addr;
153 function To_Inet_Addr (Addr : In_Addr) return Inet_Addr_Type;
154 -- Conversion functions
156 function To_Host_Entry (E : Hostent) return Host_Entry_Type;
157 -- Conversion function
159 function To_Service_Entry (E : Servent) return Service_Entry_Type;
160 -- Conversion function
162 function To_Timeval (Val : Selector_Duration) return Timeval;
163 -- Separate Val in seconds and microseconds
165 procedure Raise_Socket_Error (Error : Integer);
166 -- Raise Socket_Error with an exception message describing
169 procedure Raise_Host_Error (Error : Integer);
170 -- Raise Host_Error exception with message describing error code
171 -- (note hstrerror seems to be obsolete).
173 procedure Narrow (Item : in out Socket_Set_Type);
174 -- Update Last as it may be greater than the real last socket
176 -- Types needed for Datagram_Socket_Stream_Type
178 type Datagram_Socket_Stream_Type is new Root_Stream_Type with record
179 Socket : Socket_Type;
181 From : Sock_Addr_Type;
184 type Datagram_Socket_Stream_Access is
185 access all Datagram_Socket_Stream_Type;
188 (Stream : in out Datagram_Socket_Stream_Type;
189 Item : out Ada.Streams.Stream_Element_Array;
190 Last : out Ada.Streams.Stream_Element_Offset);
193 (Stream : in out Datagram_Socket_Stream_Type;
194 Item : Ada.Streams.Stream_Element_Array);
196 -- Types needed for Stream_Socket_Stream_Type
198 type Stream_Socket_Stream_Type is new Root_Stream_Type with record
199 Socket : Socket_Type;
202 type Stream_Socket_Stream_Access is
203 access all Stream_Socket_Stream_Type;
206 (Stream : in out Stream_Socket_Stream_Type;
207 Item : out Ada.Streams.Stream_Element_Array;
208 Last : out Ada.Streams.Stream_Element_Offset);
211 (Stream : in out Stream_Socket_Stream_Type;
212 Item : Ada.Streams.Stream_Element_Array);
218 function "+" (L, R : Request_Flag_Type) return Request_Flag_Type is
227 procedure Abort_Selector (Selector : Selector_Type) is
228 Buf : aliased Character := ASCII.NUL;
232 -- Send an empty array to unblock C select system call
234 Res := C_Send (C.int (Selector.W_Sig_Socket), Buf'Address, 1,
235 Constants.MSG_Forced_Flags);
236 if Res = Failure then
237 Raise_Socket_Error (Socket_Errno);
245 procedure Accept_Socket
246 (Server : Socket_Type;
247 Socket : out Socket_Type;
248 Address : out Sock_Addr_Type)
251 Sin : aliased Sockaddr_In;
252 Len : aliased C.int := Sin'Size / 8;
255 Res := C_Accept (C.int (Server), Sin'Address, Len'Access);
257 if Res = Failure then
258 Raise_Socket_Error (Socket_Errno);
261 Socket := Socket_Type (Res);
263 Address.Addr := To_Inet_Addr (Sin.Sin_Addr);
264 Address.Port := Port_Type (Network_To_Short (Sin.Sin_Port));
272 (E : Host_Entry_Type;
273 N : Positive := 1) return Inet_Addr_Type
276 return E.Addresses (N);
279 ----------------------
280 -- Addresses_Length --
281 ----------------------
283 function Addresses_Length (E : Host_Entry_Type) return Natural is
285 return E.Addresses_Length;
286 end Addresses_Length;
293 (E : Host_Entry_Type;
294 N : Positive := 1) return String
297 return To_String (E.Aliases (N));
305 (S : Service_Entry_Type;
306 N : Positive := 1) return String
309 return To_String (S.Aliases (N));
316 function Aliases_Length (E : Host_Entry_Type) return Natural is
318 return E.Aliases_Length;
325 function Aliases_Length (S : Service_Entry_Type) return Natural is
327 return S.Aliases_Length;
334 procedure Bind_Socket
335 (Socket : Socket_Type;
336 Address : Sock_Addr_Type)
339 Sin : aliased Sockaddr_In;
340 Len : constant C.int := Sin'Size / 8;
343 if Address.Family = Family_Inet6 then
347 Set_Length (Sin'Unchecked_Access, Len);
348 Set_Family (Sin'Unchecked_Access, Families (Address.Family));
350 (Sin'Unchecked_Access,
351 Short_To_Network (C.unsigned_short (Address.Port)));
353 Res := C_Bind (C.int (Socket), Sin'Address, Len);
355 if Res = Failure then
356 Raise_Socket_Error (Socket_Errno);
364 procedure Check_Selector
365 (Selector : in out Selector_Type;
366 R_Socket_Set : in out Socket_Set_Type;
367 W_Socket_Set : in out Socket_Set_Type;
368 Status : out Selector_Status;
369 Timeout : Selector_Duration := Forever)
371 E_Socket_Set : Socket_Set_Type; -- (No_Socket, No_Socket_Set)
374 (Selector, R_Socket_Set, W_Socket_Set, E_Socket_Set, Status, Timeout);
377 procedure Check_Selector
378 (Selector : in out Selector_Type;
379 R_Socket_Set : in out Socket_Set_Type;
380 W_Socket_Set : in out Socket_Set_Type;
381 E_Socket_Set : in out Socket_Set_Type;
382 Status : out Selector_Status;
383 Timeout : Selector_Duration := Forever)
387 RSet : Socket_Set_Type;
388 WSet : Socket_Set_Type;
389 ESet : Socket_Set_Type;
390 TVal : aliased Timeval;
391 TPtr : Timeval_Access;
396 -- No timeout or Forever is indicated by a null timeval pointer
398 if Timeout = Forever then
401 TVal := To_Timeval (Timeout);
402 TPtr := TVal'Unchecked_Access;
405 -- Copy R_Socket_Set in RSet and add read signalling socket
407 RSet := (Set => New_Socket_Set (R_Socket_Set.Set),
408 Last => R_Socket_Set.Last);
409 Set (RSet, Selector.R_Sig_Socket);
411 -- Copy W_Socket_Set in WSet
413 WSet := (Set => New_Socket_Set (W_Socket_Set.Set),
414 Last => W_Socket_Set.Last);
416 -- Copy E_Socket_Set in ESet
418 ESet := (Set => New_Socket_Set (E_Socket_Set.Set),
419 Last => E_Socket_Set.Last);
421 Last := C.int'Max (C.int'Max (C.int (RSet.Last),
433 if Res = Failure then
434 Raise_Socket_Error (Socket_Errno);
437 -- If Select was resumed because of read signalling socket,
438 -- read this data and remove socket from set.
440 if Is_Set (RSet, Selector.R_Sig_Socket) then
441 Clear (RSet, Selector.R_Sig_Socket);
447 Res := C_Recv (C.int (Selector.R_Sig_Socket), Buf'Address, 1, 0);
449 if Res = Failure then
450 Raise_Socket_Error (Socket_Errno);
460 -- Update RSet, WSet and ESet in regard to their new socket
467 -- Reset RSet as it should be if R_Sig_Socket was not added
469 if Is_Empty (RSet) then
473 if Is_Empty (WSet) then
477 if Is_Empty (ESet) then
481 -- Deliver RSet, WSet and ESet
483 Empty (R_Socket_Set);
484 R_Socket_Set := RSet;
486 Empty (W_Socket_Set);
487 W_Socket_Set := WSet;
489 Empty (E_Socket_Set);
490 E_Socket_Set := ESet;
498 (Item : in out Socket_Set_Type;
499 Socket : Socket_Type)
501 Last : aliased C.int := C.int (Item.Last);
504 if Item.Last /= No_Socket then
505 Remove_Socket_From_Set (Item.Set, C.int (Socket));
506 Last_Socket_In_Set (Item.Set, Last'Unchecked_Access);
507 Item.Last := Socket_Type (Last);
515 -- Comments needed below ???
516 -- Why are exceptions ignored ???
518 procedure Close_Selector (Selector : in out Selector_Type) is
521 Close_Socket (Selector.R_Sig_Socket);
529 Close_Socket (Selector.W_Sig_Socket);
541 procedure Close_Socket (Socket : Socket_Type) is
545 Res := C_Close (C.int (Socket));
547 if Res = Failure then
548 Raise_Socket_Error (Socket_Errno);
556 procedure Connect_Socket
557 (Socket : Socket_Type;
558 Server : in out Sock_Addr_Type)
561 Sin : aliased Sockaddr_In;
562 Len : constant C.int := Sin'Size / 8;
565 if Server.Family = Family_Inet6 then
569 Set_Length (Sin'Unchecked_Access, Len);
570 Set_Family (Sin'Unchecked_Access, Families (Server.Family));
571 Set_Address (Sin'Unchecked_Access, To_In_Addr (Server.Addr));
573 (Sin'Unchecked_Access,
574 Short_To_Network (C.unsigned_short (Server.Port)));
576 Res := C_Connect (C.int (Socket), Sin'Address, Len);
578 if Res = Failure then
579 Raise_Socket_Error (Socket_Errno);
587 procedure Control_Socket
588 (Socket : Socket_Type;
589 Request : in out Request_Type)
596 when Non_Blocking_IO =>
597 Arg := C.int (Boolean'Pos (Request.Enabled));
599 when N_Bytes_To_Read =>
606 Requests (Request.Name),
607 Arg'Unchecked_Access);
609 if Res = Failure then
610 Raise_Socket_Error (Socket_Errno);
614 when Non_Blocking_IO =>
617 when N_Bytes_To_Read =>
618 Request.Size := Natural (Arg);
628 (Source : Socket_Set_Type;
629 Target : in out Socket_Set_Type)
633 if Source.Last /= No_Socket then
634 Target.Set := New_Socket_Set (Source.Set);
635 Target.Last := Source.Last;
639 ---------------------
640 -- Create_Selector --
641 ---------------------
643 procedure Create_Selector (Selector : out Selector_Type) is
648 Sin : aliased Sockaddr_In;
649 Len : aliased C.int := Sin'Size / 8;
653 -- We open two signalling sockets. One of them is used to send data to
654 -- send data to the other, which is included in a C_Select socket set.
655 -- The communication is used to force the call to C_Select to complete,
656 -- and the waiting task to resume its execution.
658 -- Create a listening socket
660 S0 := C_Socket (Constants.AF_INET, Constants.SOCK_STREAM, 0);
662 Raise_Socket_Error (Socket_Errno);
665 -- Bind the socket to any unused port on localhost
667 Sin.Sin_Addr.S_B1 := 127;
668 Sin.Sin_Addr.S_B2 := 0;
669 Sin.Sin_Addr.S_B3 := 0;
670 Sin.Sin_Addr.S_B4 := 1;
673 Res := C_Bind (S0, Sin'Address, Len);
674 if Res = Failure then
677 Raise_Socket_Error (Err);
680 -- Get the port used by the socket
682 Res := C_Getsockname (S0, Sin'Address, Len'Access);
684 if Res = Failure then
687 Raise_Socket_Error (Err);
690 -- Set backlog to 1 to guarantee that exactly one call to connect(2)
693 Res := C_Listen (S0, 1);
695 if Res = Failure then
698 Raise_Socket_Error (Err);
701 S1 := C_Socket (Constants.AF_INET, Constants.SOCK_STREAM, 0);
706 Raise_Socket_Error (Err);
709 -- Do a connect and accept the connection
711 Res := C_Connect (S1, Sin'Address, Len);
713 if Res = Failure then
717 Raise_Socket_Error (Err);
720 -- Since the call to connect(2) has suceeded and the backlog limit on
721 -- the listening socket is 1, we know that there is now exactly one
722 -- pending connection on S0, which is the one from S1.
724 S2 := C_Accept (S0, Sin'Address, Len'Access);
730 Raise_Socket_Error (Err);
735 if Res = Failure then
736 Raise_Socket_Error (Socket_Errno);
739 Selector.R_Sig_Socket := Socket_Type (S1);
740 Selector.W_Sig_Socket := Socket_Type (S2);
747 procedure Create_Socket
748 (Socket : out Socket_Type;
749 Family : Family_Type := Family_Inet;
750 Mode : Mode_Type := Socket_Stream)
755 Res := C_Socket (Families (Family), Modes (Mode), 0);
757 if Res = Failure then
758 Raise_Socket_Error (Socket_Errno);
761 Socket := Socket_Type (Res);
768 procedure Empty (Item : in out Socket_Set_Type) is
770 if Item.Set /= No_Socket_Set then
771 Free_Socket_Set (Item.Set);
772 Item.Set := No_Socket_Set;
775 Item.Last := No_Socket;
782 procedure Finalize is
797 (Item : in out Socket_Set_Type;
798 Socket : out Socket_Type)
801 L : aliased C.int := C.int (Item.Last);
804 if Item.Last /= No_Socket then
806 (Item.Set, L'Unchecked_Access, S'Unchecked_Access);
807 Item.Last := Socket_Type (L);
808 Socket := Socket_Type (S);
818 function Get_Address (Stream : Stream_Access) return Sock_Addr_Type is
820 if Stream = null then
823 elsif Stream.all in Datagram_Socket_Stream_Type then
824 return Datagram_Socket_Stream_Type (Stream.all).From;
827 return Get_Peer_Name (Stream_Socket_Stream_Type (Stream.all).Socket);
831 -------------------------
832 -- Get_Host_By_Address --
833 -------------------------
835 function Get_Host_By_Address
836 (Address : Inet_Addr_Type;
837 Family : Family_Type := Family_Inet) return Host_Entry_Type
839 pragma Unreferenced (Family);
841 HA : aliased In_Addr := To_In_Addr (Address);
842 Res : Hostent_Access;
846 -- This C function is not always thread-safe. Protect against
847 -- concurrent access.
850 Res := C_Gethostbyaddr (HA'Address, HA'Size / 8, Constants.AF_INET);
855 Raise_Host_Error (Err);
858 -- Translate from the C format to the API format
861 HE : constant Host_Entry_Type := To_Host_Entry (Res.all);
867 end Get_Host_By_Address;
869 ----------------------
870 -- Get_Host_By_Name --
871 ----------------------
873 function Get_Host_By_Name (Name : String) return Host_Entry_Type is
874 HN : constant C.char_array := C.To_C (Name);
875 Res : Hostent_Access;
879 -- Detect IP address name and redirect to Inet_Addr
881 if Is_IP_Address (Name) then
882 return Get_Host_By_Address (Inet_Addr (Name));
885 -- This C function is not always thread-safe. Protect against
886 -- concurrent access.
889 Res := C_Gethostbyname (HN);
894 Raise_Host_Error (Err);
897 -- Translate from the C format to the API format
900 HE : constant Host_Entry_Type := To_Host_Entry (Res.all);
906 end Get_Host_By_Name;
912 function Get_Peer_Name (Socket : Socket_Type) return Sock_Addr_Type is
913 Sin : aliased Sockaddr_In;
914 Len : aliased C.int := Sin'Size / 8;
915 Res : Sock_Addr_Type (Family_Inet);
918 if C_Getpeername (C.int (Socket), Sin'Address, Len'Access) = Failure then
919 Raise_Socket_Error (Socket_Errno);
922 Res.Addr := To_Inet_Addr (Sin.Sin_Addr);
923 Res.Port := Port_Type (Network_To_Short (Sin.Sin_Port));
928 -------------------------
929 -- Get_Service_By_Name --
930 -------------------------
932 function Get_Service_By_Name
934 Protocol : String) return Service_Entry_Type
936 SN : constant C.char_array := C.To_C (Name);
937 SP : constant C.char_array := C.To_C (Protocol);
938 Res : Servent_Access;
941 -- This C function is not always thread-safe. Protect against
942 -- concurrent access.
945 Res := C_Getservbyname (SN, SP);
949 Ada.Exceptions.Raise_Exception
950 (Service_Error'Identity, "Service not found");
953 -- Translate from the C format to the API format
956 SE : constant Service_Entry_Type := To_Service_Entry (Res.all);
962 end Get_Service_By_Name;
964 -------------------------
965 -- Get_Service_By_Port --
966 -------------------------
968 function Get_Service_By_Port
970 Protocol : String) return Service_Entry_Type
972 SP : constant C.char_array := C.To_C (Protocol);
973 Res : Servent_Access;
976 -- This C function is not always thread-safe. Protect against
977 -- concurrent access.
980 Res := C_Getservbyport
981 (C.int (Short_To_Network (C.unsigned_short (Port))), SP);
985 Ada.Exceptions.Raise_Exception
986 (Service_Error'Identity, "Service not found");
989 -- Translate from the C format to the API format
992 SE : constant Service_Entry_Type := To_Service_Entry (Res.all);
998 end Get_Service_By_Port;
1000 ---------------------
1001 -- Get_Socket_Name --
1002 ---------------------
1004 function Get_Socket_Name
1005 (Socket : Socket_Type) return Sock_Addr_Type
1007 Sin : aliased Sockaddr_In;
1008 Len : aliased C.int := Sin'Size / 8;
1010 Addr : Sock_Addr_Type := No_Sock_Addr;
1013 Res := C_Getsockname (C.int (Socket), Sin'Address, Len'Access);
1014 if Res /= Failure then
1015 Addr.Addr := To_Inet_Addr (Sin.Sin_Addr);
1016 Addr.Port := Port_Type (Network_To_Short (Sin.Sin_Port));
1020 end Get_Socket_Name;
1022 -----------------------
1023 -- Get_Socket_Option --
1024 -----------------------
1026 function Get_Socket_Option
1027 (Socket : Socket_Type;
1028 Level : Level_Type := Socket_Level;
1029 Name : Option_Name) return Option_Type
1031 use type C.unsigned_char;
1033 V8 : aliased Two_Int;
1035 V1 : aliased C.unsigned_char;
1036 Len : aliased C.int;
1037 Add : System.Address;
1039 Opt : Option_Type (Name);
1043 when Multicast_Loop |
1071 Add, Len'Unchecked_Access);
1073 if Res = Failure then
1074 Raise_Socket_Error (Socket_Errno);
1082 Opt.Enabled := (V4 /= 0);
1085 Opt.Enabled := (V8 (V8'First) /= 0);
1086 Opt.Seconds := Natural (V8 (V8'Last));
1090 Opt.Size := Natural (V4);
1093 Opt.Error := Resolve_Error (Integer (V4));
1095 when Add_Membership |
1097 Opt.Multicast_Address := To_Inet_Addr (To_In_Addr (V8 (V8'First)));
1098 Opt.Local_Interface := To_Inet_Addr (To_In_Addr (V8 (V8'Last)));
1100 when Multicast_TTL =>
1101 Opt.Time_To_Live := Integer (V1);
1103 when Multicast_Loop =>
1104 Opt.Enabled := (V1 /= 0);
1109 end Get_Socket_Option;
1115 function Host_Name return String is
1116 Name : aliased C.char_array (1 .. 64);
1120 Res := C_Gethostname (Name'Address, Name'Length);
1122 if Res = Failure then
1123 Raise_Socket_Error (Socket_Errno);
1126 return C.To_Ada (Name);
1134 (Val : Inet_Addr_VN_Type;
1135 Hex : Boolean := False) return String
1137 -- The largest Inet_Addr_Comp_Type image occurs with IPv4. It
1138 -- has at most a length of 3 plus one '.' character.
1140 Buffer : String (1 .. 4 * Val'Length);
1141 Length : Natural := 1;
1142 Separator : Character;
1144 procedure Img10 (V : Inet_Addr_Comp_Type);
1145 -- Append to Buffer image of V in decimal format
1147 procedure Img16 (V : Inet_Addr_Comp_Type);
1148 -- Append to Buffer image of V in hexadecimal format
1154 procedure Img10 (V : Inet_Addr_Comp_Type) is
1155 Img : constant String := V'Img;
1156 Len : constant Natural := Img'Length - 1;
1159 Buffer (Length .. Length + Len - 1) := Img (2 .. Img'Last);
1160 Length := Length + Len;
1167 procedure Img16 (V : Inet_Addr_Comp_Type) is
1169 Buffer (Length) := Hex_To_Char (Natural (V / 16) + 1);
1170 Buffer (Length + 1) := Hex_To_Char (Natural (V mod 16) + 1);
1171 Length := Length + 2;
1174 -- Start of processing for Image
1183 for J in Val'Range loop
1190 if J /= Val'Last then
1191 Buffer (Length) := Separator;
1192 Length := Length + 1;
1196 return Buffer (1 .. Length - 1);
1203 function Image (Value : Inet_Addr_Type) return String is
1205 if Value.Family = Family_Inet then
1206 return Image (Inet_Addr_VN_Type (Value.Sin_V4), Hex => False);
1208 return Image (Inet_Addr_VN_Type (Value.Sin_V6), Hex => True);
1216 function Image (Value : Sock_Addr_Type) return String is
1217 Port : constant String := Value.Port'Img;
1219 return Image (Value.Addr) & ':' & Port (2 .. Port'Last);
1226 function Image (Socket : Socket_Type) return String is
1235 function Inet_Addr (Image : String) return Inet_Addr_Type is
1236 use Interfaces.C.Strings;
1242 -- Special case for the all-ones broadcast address: this address
1243 -- has the same in_addr_t value as Failure, and thus cannot be
1244 -- properly returned by inet_addr(3).
1246 if Image (Image'Range) = "255.255.255.255" then
1247 return Broadcast_Inet_Addr;
1250 Img := New_String (Image);
1251 Res := C_Inet_Addr (Img);
1254 if Res = Failure then
1255 Raise_Socket_Error (Constants.EINVAL);
1258 return To_Inet_Addr (To_In_Addr (Res));
1265 procedure Initialize (Process_Blocking_IO : Boolean := False) is
1267 if not Initialized then
1268 Initialized := True;
1269 Thin.Initialize (Process_Blocking_IO);
1277 function Is_Empty (Item : Socket_Set_Type) return Boolean is
1279 return Item.Last = No_Socket;
1286 function Is_IP_Address (Name : String) return Boolean is
1288 for J in Name'Range loop
1290 and then Name (J) not in '0' .. '9'
1304 (Item : Socket_Set_Type;
1305 Socket : Socket_Type) return Boolean
1308 return Item.Last /= No_Socket
1309 and then Socket <= Item.Last
1310 and then Is_Socket_In_Set (Item.Set, C.int (Socket)) /= 0;
1317 procedure Listen_Socket
1318 (Socket : Socket_Type;
1319 Length : Positive := 15)
1321 Res : constant C.int := C_Listen (C.int (Socket), C.int (Length));
1323 if Res = Failure then
1324 Raise_Socket_Error (Socket_Errno);
1332 procedure Narrow (Item : in out Socket_Set_Type) is
1333 Last : aliased C.int := C.int (Item.Last);
1335 if Item.Set /= No_Socket_Set then
1336 Last_Socket_In_Set (Item.Set, Last'Unchecked_Access);
1337 Item.Last := Socket_Type (Last);
1345 function Official_Name (E : Host_Entry_Type) return String is
1347 return To_String (E.Official);
1354 function Official_Name (S : Service_Entry_Type) return String is
1356 return To_String (S.Official);
1363 function Port_Number (S : Service_Entry_Type) return Port_Type is
1372 function Protocol_Name (S : Service_Entry_Type) return String is
1374 return To_String (S.Protocol);
1377 ----------------------
1378 -- Raise_Host_Error --
1379 ----------------------
1381 procedure Raise_Host_Error (Error : Integer) is
1383 function Host_Error_Message return String;
1384 -- We do not use a C function like strerror because hstrerror
1385 -- that would correspond seems to be obsolete. Return
1386 -- appropriate string for error value.
1388 ------------------------
1389 -- Host_Error_Message --
1390 ------------------------
1392 function Host_Error_Message return String is
1395 when Constants.HOST_NOT_FOUND => return "Host not found";
1396 when Constants.TRY_AGAIN => return "Try again";
1397 when Constants.NO_RECOVERY => return "No recovery";
1398 when Constants.NO_DATA => return "No address";
1399 when others => return "Unknown error";
1401 end Host_Error_Message;
1403 -- Start of processing for Raise_Host_Error
1406 Ada.Exceptions.Raise_Exception (Host_Error'Identity, Host_Error_Message);
1407 end Raise_Host_Error;
1409 ------------------------
1410 -- Raise_Socket_Error --
1411 ------------------------
1413 procedure Raise_Socket_Error (Error : Integer) is
1414 use type C.Strings.chars_ptr;
1416 function Image (E : Integer) return String;
1422 function Image (E : Integer) return String is
1423 Msg : String := E'Img & "] ";
1425 Msg (Msg'First) := '[';
1429 -- Start of processing for Raise_Socket_Error
1432 Ada.Exceptions.Raise_Exception
1433 (Socket_Error'Identity,
1434 Image (Error) & C.Strings.Value (Socket_Error_Message (Error)));
1435 end Raise_Socket_Error;
1442 (Stream : in out Datagram_Socket_Stream_Type;
1443 Item : out Ada.Streams.Stream_Element_Array;
1444 Last : out Ada.Streams.Stream_Element_Offset)
1446 First : Ada.Streams.Stream_Element_Offset := Item'First;
1447 Index : Ada.Streams.Stream_Element_Offset := First - 1;
1448 Max : constant Ada.Streams.Stream_Element_Offset := Item'Last;
1454 Item (First .. Max),
1460 -- Exit when all or zero data received. Zero means that
1461 -- the socket peer is closed.
1463 exit when Index < First or else Index = Max;
1474 (Stream : in out Stream_Socket_Stream_Type;
1475 Item : out Ada.Streams.Stream_Element_Array;
1476 Last : out Ada.Streams.Stream_Element_Offset)
1478 First : Ada.Streams.Stream_Element_Offset := Item'First;
1479 Index : Ada.Streams.Stream_Element_Offset := First - 1;
1480 Max : constant Ada.Streams.Stream_Element_Offset := Item'Last;
1484 Receive_Socket (Stream.Socket, Item (First .. Max), Index);
1487 -- Exit when all or zero data received. Zero means that
1488 -- the socket peer is closed.
1490 exit when Index < First or else Index = Max;
1496 --------------------
1497 -- Receive_Socket --
1498 --------------------
1500 procedure Receive_Socket
1501 (Socket : Socket_Type;
1502 Item : out Ada.Streams.Stream_Element_Array;
1503 Last : out Ada.Streams.Stream_Element_Offset;
1504 Flags : Request_Flag_Type := No_Request_Flag)
1506 use type Ada.Streams.Stream_Element_Offset;
1513 Item (Item'First)'Address,
1517 if Res = Failure then
1518 Raise_Socket_Error (Socket_Errno);
1521 Last := Item'First + Ada.Streams.Stream_Element_Offset (Res - 1);
1524 --------------------
1525 -- Receive_Socket --
1526 --------------------
1528 procedure Receive_Socket
1529 (Socket : Socket_Type;
1530 Item : out Ada.Streams.Stream_Element_Array;
1531 Last : out Ada.Streams.Stream_Element_Offset;
1532 From : out Sock_Addr_Type;
1533 Flags : Request_Flag_Type := No_Request_Flag)
1535 use type Ada.Streams.Stream_Element_Offset;
1538 Sin : aliased Sockaddr_In;
1539 Len : aliased C.int := Sin'Size / 8;
1545 Item (Item'First)'Address,
1548 Sin'Unchecked_Access,
1549 Len'Unchecked_Access);
1551 if Res = Failure then
1552 Raise_Socket_Error (Socket_Errno);
1555 Last := Item'First + Ada.Streams.Stream_Element_Offset (Res - 1);
1557 From.Addr := To_Inet_Addr (Sin.Sin_Addr);
1558 From.Port := Port_Type (Network_To_Short (Sin.Sin_Port));
1565 function Resolve_Error
1566 (Error_Value : Integer;
1567 From_Errno : Boolean := True) return Error_Type
1569 use GNAT.Sockets.Constants;
1572 if not From_Errno then
1574 when Constants.HOST_NOT_FOUND => return Unknown_Host;
1575 when Constants.TRY_AGAIN => return Host_Name_Lookup_Failure;
1576 when Constants.NO_RECOVERY =>
1577 return Non_Recoverable_Error;
1578 when Constants.NO_DATA => return Unknown_Server_Error;
1579 when others => return Cannot_Resolve_Error;
1584 when ENOERROR => return Success;
1585 when EACCES => return Permission_Denied;
1586 when EADDRINUSE => return Address_Already_In_Use;
1587 when EADDRNOTAVAIL => return Cannot_Assign_Requested_Address;
1588 when EAFNOSUPPORT =>
1589 return Address_Family_Not_Supported_By_Protocol;
1590 when EALREADY => return Operation_Already_In_Progress;
1591 when EBADF => return Bad_File_Descriptor;
1592 when ECONNABORTED => return Software_Caused_Connection_Abort;
1593 when ECONNREFUSED => return Connection_Refused;
1594 when ECONNRESET => return Connection_Reset_By_Peer;
1595 when EDESTADDRREQ => return Destination_Address_Required;
1596 when EFAULT => return Bad_Address;
1597 when EHOSTDOWN => return Host_Is_Down;
1598 when EHOSTUNREACH => return No_Route_To_Host;
1599 when EINPROGRESS => return Operation_Now_In_Progress;
1600 when EINTR => return Interrupted_System_Call;
1601 when EINVAL => return Invalid_Argument;
1602 when EIO => return Input_Output_Error;
1603 when EISCONN => return Transport_Endpoint_Already_Connected;
1604 when ELOOP => return Too_Many_Symbolic_Links;
1605 when EMFILE => return Too_Many_Open_Files;
1606 when EMSGSIZE => return Message_Too_Long;
1607 when ENAMETOOLONG => return File_Name_Too_Long;
1608 when ENETDOWN => return Network_Is_Down;
1610 return Network_Dropped_Connection_Because_Of_Reset;
1611 when ENETUNREACH => return Network_Is_Unreachable;
1612 when ENOBUFS => return No_Buffer_Space_Available;
1613 when ENOPROTOOPT => return Protocol_Not_Available;
1614 when ENOTCONN => return Transport_Endpoint_Not_Connected;
1615 when ENOTSOCK => return Socket_Operation_On_Non_Socket;
1616 when EOPNOTSUPP => return Operation_Not_Supported;
1617 when EPFNOSUPPORT => return Protocol_Family_Not_Supported;
1618 when EPROTONOSUPPORT => return Protocol_Not_Supported;
1619 when EPROTOTYPE => return Protocol_Wrong_Type_For_Socket;
1621 return Cannot_Send_After_Transport_Endpoint_Shutdown;
1622 when ESOCKTNOSUPPORT => return Socket_Type_Not_Supported;
1623 when ETIMEDOUT => return Connection_Timed_Out;
1624 when ETOOMANYREFS => return Too_Many_References;
1625 when EWOULDBLOCK => return Resource_Temporarily_Unavailable;
1626 when others => null;
1629 return Cannot_Resolve_Error;
1632 -----------------------
1633 -- Resolve_Exception --
1634 -----------------------
1636 function Resolve_Exception
1637 (Occurrence : Exception_Occurrence) return Error_Type
1639 Id : constant Exception_Id := Exception_Identity (Occurrence);
1640 Msg : constant String := Exception_Message (Occurrence);
1641 First : Natural := Msg'First;
1646 while First <= Msg'Last
1647 and then Msg (First) not in '0' .. '9'
1652 if First > Msg'Last then
1653 return Cannot_Resolve_Error;
1658 while Last < Msg'Last
1659 and then Msg (Last + 1) in '0' .. '9'
1664 Val := Integer'Value (Msg (First .. Last));
1666 if Id = Socket_Error_Id then
1667 return Resolve_Error (Val);
1668 elsif Id = Host_Error_Id then
1669 return Resolve_Error (Val, False);
1671 return Cannot_Resolve_Error;
1673 end Resolve_Exception;
1675 --------------------
1676 -- Receive_Vector --
1677 --------------------
1679 procedure Receive_Vector
1680 (Socket : Socket_Type;
1681 Vector : Vector_Type;
1682 Count : out Ada.Streams.Stream_Element_Count)
1690 Vector (Vector'First)'Address,
1693 if Res = Failure then
1694 Raise_Socket_Error (Socket_Errno);
1697 Count := Ada.Streams.Stream_Element_Count (Res);
1704 procedure Send_Socket
1705 (Socket : Socket_Type;
1706 Item : Ada.Streams.Stream_Element_Array;
1707 Last : out Ada.Streams.Stream_Element_Offset;
1708 Flags : Request_Flag_Type := No_Request_Flag)
1710 use type Ada.Streams.Stream_Element_Offset;
1718 Item (Item'First)'Address,
1720 Set_Forced_Flags (To_Int (Flags)));
1722 if Res = Failure then
1723 Raise_Socket_Error (Socket_Errno);
1726 Last := Item'First + Ada.Streams.Stream_Element_Offset (Res - 1);
1733 procedure Send_Socket
1734 (Socket : Socket_Type;
1735 Item : Ada.Streams.Stream_Element_Array;
1736 Last : out Ada.Streams.Stream_Element_Offset;
1737 To : Sock_Addr_Type;
1738 Flags : Request_Flag_Type := No_Request_Flag)
1740 use type Ada.Streams.Stream_Element_Offset;
1743 Sin : aliased Sockaddr_In;
1744 Len : constant C.int := Sin'Size / 8;
1747 Set_Length (Sin'Unchecked_Access, Len);
1748 Set_Family (Sin'Unchecked_Access, Families (To.Family));
1749 Set_Address (Sin'Unchecked_Access, To_In_Addr (To.Addr));
1751 (Sin'Unchecked_Access,
1752 Short_To_Network (C.unsigned_short (To.Port)));
1756 Item (Item'First)'Address,
1758 Set_Forced_Flags (To_Int (Flags)),
1759 Sin'Unchecked_Access,
1762 if Res = Failure then
1763 Raise_Socket_Error (Socket_Errno);
1766 Last := Item'First + Ada.Streams.Stream_Element_Offset (Res - 1);
1773 procedure Send_Vector
1774 (Socket : Socket_Type;
1775 Vector : Vector_Type;
1776 Count : out Ada.Streams.Stream_Element_Count)
1784 Vector (Vector'First)'Address,
1787 if Res = Failure then
1788 Raise_Socket_Error (Socket_Errno);
1791 Count := Ada.Streams.Stream_Element_Count (Res);
1798 procedure Set (Item : in out Socket_Set_Type; Socket : Socket_Type) is
1800 if Item.Set = No_Socket_Set then
1801 Item.Set := New_Socket_Set (No_Socket_Set);
1802 Item.Last := Socket;
1804 elsif Item.Last < Socket then
1805 Item.Last := Socket;
1808 Insert_Socket_In_Set (Item.Set, C.int (Socket));
1811 ----------------------
1812 -- Set_Forced_Flags --
1813 ----------------------
1815 function Set_Forced_Flags (F : C.int) return C.int is
1816 use type C.unsigned;
1817 function To_unsigned is
1818 new Ada.Unchecked_Conversion (C.int, C.unsigned);
1820 new Ada.Unchecked_Conversion (C.unsigned, C.int);
1822 return To_int (To_unsigned (F) or Constants.MSG_Forced_Flags);
1823 end Set_Forced_Flags;
1825 -----------------------
1826 -- Set_Socket_Option --
1827 -----------------------
1829 procedure Set_Socket_Option
1830 (Socket : Socket_Type;
1831 Level : Level_Type := Socket_Level;
1832 Option : Option_Type)
1834 V8 : aliased Two_Int;
1836 V1 : aliased C.unsigned_char;
1837 Len : aliased C.int;
1838 Add : System.Address := Null_Address;
1847 V4 := C.int (Boolean'Pos (Option.Enabled));
1852 V8 (V8'First) := C.int (Boolean'Pos (Option.Enabled));
1853 V8 (V8'Last) := C.int (Option.Seconds);
1859 V4 := C.int (Option.Size);
1864 V4 := C.int (Boolean'Pos (True));
1868 when Add_Membership |
1870 V8 (V8'First) := To_Int (To_In_Addr (Option.Multicast_Address));
1871 V8 (V8'Last) := To_Int (To_In_Addr (Option.Local_Interface));
1875 when Multicast_TTL =>
1876 V1 := C.unsigned_char (Option.Time_To_Live);
1880 when Multicast_Loop =>
1881 V1 := C.unsigned_char (Boolean'Pos (Option.Enabled));
1890 Options (Option.Name),
1893 if Res = Failure then
1894 Raise_Socket_Error (Socket_Errno);
1896 end Set_Socket_Option;
1898 ----------------------
1899 -- Short_To_Network --
1900 ----------------------
1902 function Short_To_Network (S : C.unsigned_short) return C.unsigned_short is
1903 use type C.unsigned_short;
1906 -- Big-endian case. No conversion needed. On these platforms,
1907 -- htons() defaults to a null procedure.
1909 pragma Warnings (Off);
1910 -- Since the test can generate "always True/False" warning
1912 if Default_Bit_Order = High_Order_First then
1915 pragma Warnings (On);
1917 -- Little-endian case. We must swap the high and low bytes of this
1918 -- short to make the port number network compliant.
1921 return (S / 256) + (S mod 256) * 256;
1923 end Short_To_Network;
1925 ---------------------
1926 -- Shutdown_Socket --
1927 ---------------------
1929 procedure Shutdown_Socket
1930 (Socket : Socket_Type;
1931 How : Shutmode_Type := Shut_Read_Write)
1936 Res := C_Shutdown (C.int (Socket), Shutmodes (How));
1938 if Res = Failure then
1939 Raise_Socket_Error (Socket_Errno);
1941 end Shutdown_Socket;
1948 (Socket : Socket_Type;
1949 Send_To : Sock_Addr_Type) return Stream_Access
1951 S : Datagram_Socket_Stream_Access;
1954 S := new Datagram_Socket_Stream_Type;
1957 S.From := Get_Socket_Name (Socket);
1958 return Stream_Access (S);
1965 function Stream (Socket : Socket_Type) return Stream_Access is
1966 S : Stream_Socket_Stream_Access;
1969 S := new Stream_Socket_Stream_Type;
1971 return Stream_Access (S);
1978 function To_C (Socket : Socket_Type) return Integer is
1980 return Integer (Socket);
1987 function To_Host_Entry (E : Hostent) return Host_Entry_Type is
1990 Official : constant String :=
1991 C.Strings.Value (E.H_Name);
1993 Aliases : constant Chars_Ptr_Array :=
1994 Chars_Ptr_Pointers.Value (E.H_Aliases);
1995 -- H_Aliases points to a list of name aliases. The list is
1996 -- terminated by a NULL pointer.
1998 Addresses : constant In_Addr_Access_Array :=
1999 In_Addr_Access_Pointers.Value (E.H_Addr_List);
2000 -- H_Addr_List points to a list of binary addresses (in network
2001 -- byte order). The list is terminated by a NULL pointer.
2003 -- H_Length is not used because it is currently only set to 4.
2004 -- H_Addrtype is always AF_INET
2006 Result : Host_Entry_Type
2007 (Aliases_Length => Aliases'Length - 1,
2008 Addresses_Length => Addresses'Length - 1);
2009 -- The last element is a null pointer
2015 Result.Official := To_Name (Official);
2017 Source := Aliases'First;
2018 Target := Result.Aliases'First;
2019 while Target <= Result.Aliases_Length loop
2020 Result.Aliases (Target) :=
2021 To_Name (C.Strings.Value (Aliases (Source)));
2022 Source := Source + 1;
2023 Target := Target + 1;
2026 Source := Addresses'First;
2027 Target := Result.Addresses'First;
2028 while Target <= Result.Addresses_Length loop
2029 Result.Addresses (Target) :=
2030 To_Inet_Addr (Addresses (Source).all);
2031 Source := Source + 1;
2032 Target := Target + 1;
2042 function To_In_Addr (Addr : Inet_Addr_Type) return Thin.In_Addr is
2044 if Addr.Family = Family_Inet then
2045 return (S_B1 => C.unsigned_char (Addr.Sin_V4 (1)),
2046 S_B2 => C.unsigned_char (Addr.Sin_V4 (2)),
2047 S_B3 => C.unsigned_char (Addr.Sin_V4 (3)),
2048 S_B4 => C.unsigned_char (Addr.Sin_V4 (4)));
2058 function To_Inet_Addr
2059 (Addr : In_Addr) return Inet_Addr_Type
2061 Result : Inet_Addr_Type;
2063 Result.Sin_V4 (1) := Inet_Addr_Comp_Type (Addr.S_B1);
2064 Result.Sin_V4 (2) := Inet_Addr_Comp_Type (Addr.S_B2);
2065 Result.Sin_V4 (3) := Inet_Addr_Comp_Type (Addr.S_B3);
2066 Result.Sin_V4 (4) := Inet_Addr_Comp_Type (Addr.S_B4);
2074 function To_Int (F : Request_Flag_Type) return C.int
2076 Current : Request_Flag_Type := F;
2077 Result : C.int := 0;
2080 for J in Flags'Range loop
2081 exit when Current = 0;
2083 if Current mod 2 /= 0 then
2084 if Flags (J) = -1 then
2085 Raise_Socket_Error (Constants.EOPNOTSUPP);
2087 Result := Result + Flags (J);
2090 Current := Current / 2;
2100 function To_Name (N : String) return Name_Type is
2102 return Name_Type'(N'Length, N);
2105 ----------------------
2106 -- To_Service_Entry --
2107 ----------------------
2109 function To_Service_Entry (E : Servent) return Service_Entry_Type is
2112 Official : constant String :=
2113 C.Strings.Value (E.S_Name);
2115 Aliases : constant Chars_Ptr_Array :=
2116 Chars_Ptr_Pointers.Value (E.S_Aliases);
2117 -- S_Aliases points to a list of name aliases. The list is
2118 -- terminated by a NULL pointer.
2120 Protocol : constant String :=
2121 C.Strings.Value (E.S_Proto);
2123 Result : Service_Entry_Type
2124 (Aliases_Length => Aliases'Length - 1);
2125 -- The last element is a null pointer
2131 Result.Official := To_Name (Official);
2133 Source := Aliases'First;
2134 Target := Result.Aliases'First;
2135 while Target <= Result.Aliases_Length loop
2136 Result.Aliases (Target) :=
2137 To_Name (C.Strings.Value (Aliases (Source)));
2138 Source := Source + 1;
2139 Target := Target + 1;
2143 Port_Type (Network_To_Short (C.unsigned_short (E.S_Port)));
2145 Result.Protocol := To_Name (Protocol);
2148 end To_Service_Entry;
2154 function To_String (HN : Name_Type) return String is
2156 return HN.Name (1 .. HN.Length);
2163 function To_Timeval (Val : Selector_Duration) return Timeval is
2168 -- If zero, set result as zero (otherwise it gets rounded down to -1)
2174 -- Normal case where we do round down
2177 S := Timeval_Unit (Val - 0.5);
2178 MS := Timeval_Unit (1_000_000 * (Val - Selector_Duration (S)));
2189 (Stream : in out Datagram_Socket_Stream_Type;
2190 Item : Ada.Streams.Stream_Element_Array)
2192 First : Ada.Streams.Stream_Element_Offset := Item'First;
2193 Index : Ada.Streams.Stream_Element_Offset := First - 1;
2194 Max : constant Ada.Streams.Stream_Element_Offset := Item'Last;
2200 Item (First .. Max),
2204 -- Exit when all or zero data sent. Zero means that the
2205 -- socket has been closed by peer.
2207 exit when Index < First or else Index = Max;
2212 if Index /= Max then
2222 (Stream : in out Stream_Socket_Stream_Type;
2223 Item : Ada.Streams.Stream_Element_Array)
2225 First : Ada.Streams.Stream_Element_Offset := Item'First;
2226 Index : Ada.Streams.Stream_Element_Offset := First - 1;
2227 Max : constant Ada.Streams.Stream_Element_Offset := Item'Last;
2231 Send_Socket (Stream.Socket, Item (First .. Max), Index);
2233 -- Exit when all or zero data sent. Zero means that the
2234 -- socket has been closed by peer.
2236 exit when Index < First or else Index = Max;
2241 if Index /= Max then