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{
$Project$
$Workfile$
$Revision$
$DateUTC$
$Id$
This file is part of the Indy (Internet Direct) project, and is offered
under the dual-licensing agreement described on the Indy website.
(http://www.indyproject.org/)
Copyright:
(c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
}
{
$Log$
}
{
Rev 1.7 1/17/2005 7:25:48 PM JPMugaas
Moved some stack management code here to so that we can reuse it in
non-TIdComponent classes.
Made HostToNetwork and NetworkToHost byte order overload functions for IPv6
addresses.
Rev 1.6 10/26/2004 8:12:30 PM JPMugaas
Now uses TIdStrings and TIdStringList for portability.
Rev 1.5 6/30/2004 12:41:14 PM BGooijen
Added SetStackClass
Rev 1.4 6/11/2004 8:28:50 AM DSiders
Added "Do not Localize" comments.
Rev 1.3 4/18/04 2:45:38 PM RLebeau
Conversion support for Int64 values
Rev 1.2 2004.03.07 11:45:22 AM czhower
Flushbuffer fix + other minor ones found
Rev 1.1 3/6/2004 5:16:20 PM JPMugaas
Bug 67 fixes. Do not write to const values.
Rev 1.0 2004.02.03 3:14:42 PM czhower
Move and updates
Rev 1.39 2/1/2004 6:10:50 PM JPMugaas
GetSockOpt.
Rev 1.38 2/1/2004 3:28:24 AM JPMugaas
Changed WSGetLocalAddress to GetLocalAddress and moved into IdStack since
that will work the same in the DotNET as elsewhere. This is required to
reenable IPWatch.
Rev 1.37 2/1/2004 1:54:56 AM JPMugaas
Missapplied fix. IP 0.0.0.0 should now be accepted.
Rev 1.36 1/31/2004 4:39:12 PM JPMugaas
Removed empty methods.
Rev 1.35 1/31/2004 1:13:04 PM JPMugaas
Minor stack changes required as DotNET does support getting all IP addresses
just like the other stacks.
Rev 1.34 2004.01.22 5:59:10 PM czhower
IdCriticalSection
Rev 1.33 1/18/2004 11:15:52 AM JPMugaas
IsIP was not handling "0" in an IP address. This caused the address
"127.0.0.1" to be treated as a hostname.
Rev 1.32 12/4/2003 3:14:50 PM BGooijen
Added HostByAddress
Rev 1.31 1/3/2004 12:21:44 AM BGooijen
Added function SupportsIPv6
Rev 1.30 12/31/2003 9:54:16 PM BGooijen
Added IPv6 support
Rev 1.29 2003.12.31 3:47:42 PM czhower
Changed to use TextIsSame
Rev 1.28 10/21/2003 9:24:32 PM BGooijen
Started on SendTo, ReceiveFrom
Rev 1.27 10/19/2003 5:21:28 PM BGooijen
SetSocketOption
Rev 1.26 10/15/2003 7:21:02 PM DSiders
Added resource strings in TIdStack.Make.
Rev 1.25 2003.10.11 5:51:02 PM czhower
-VCL fixes for servers
-Chain suport for servers (Super core)
-Scheduler upgrades
-Full yarn support
Rev 1.24 10/5/2003 9:55:30 PM BGooijen
TIdTCPServer works on D7 and DotNet now
Rev 1.23 04/10/2003 22:31:56 HHariri
moving of WSNXXX method to IdStack and renaming of the DotNet ones
Rev 1.22 10/2/2003 7:31:18 PM BGooijen
.net
Rev 1.21 10/2/2003 6:05:16 PM GGrieve
DontNet
Rev 1.20 2003.10.02 10:16:30 AM czhower
.Net
Rev 1.19 2003.10.01 9:11:20 PM czhower
.Net
Rev 1.18 2003.10.01 5:05:16 PM czhower
.Net
Rev 1.17 2003.10.01 2:30:40 PM czhower
.Net
Rev 1.16 2003.10.01 12:30:08 PM czhower
.Net
Rev 1.14 2003.10.01 1:37:36 AM czhower
.Net
Rev 1.12 9/30/2003 7:15:46 PM BGooijen
IdCompilerDefines.inc is included now
Rev 1.11 2003.09.30 1:23:04 PM czhower
Stack split for DotNet
}
unit IdStack;
interface
{$I IdCompilerDefines.inc}
uses
Classes,
IdException, IdStackConsts, IdGlobal, SysUtils;
type
EIdSocketError = class(EIdException)
protected
FLastError: Integer;
public
// Params must be in this order to avoid conflict with CreateHelp
// constructor in CBuilder as CB does not differentiate constructors
// by name as Delphi does
constructor CreateError(const AErr: Integer; const AMsg: string); virtual;
//
property LastError: Integer read FLastError;
end;
{ resolving hostnames }
EIdStackError = class (EIdException);
EIdIPVersionUnsupported = class (EIdStackError);
{$IFDEF UNIX}
EIdResolveError = class(EIdSocketError);
EIdReverseResolveError = class(EIdSocketError);
EIdMaliciousPtrRecord = class(EIdReverseResolveError);
{$ELSE}
EIdMaliciousPtrRecord = class(EIdSocketError);
{$ENDIF}
EIdNotASocket = class(EIdSocketError);
{$IFDEF USE_VCL_POSIX}
{$IFDEF ANDROID}
EIdAndroidPermissionNeeded = class(EIdSocketError);
EIdInternetPermissionNeeded = class(EIdAndroidPermissionNeeded);
{$ENDIF}
{$ENDIF}
TIdServeFile = function(ASocket: TIdStackSocketHandle; const AFileName: string): Int64;
TIdPacketInfo = class
protected
FSourceIP: String;
FSourcePort : TIdPort;
FSourceIF: UInt32;
FSourceIPVersion: TIdIPVersion;
FDestIP: String;
FDestPort : TIdPort;
FDestIF: UInt32;
FDestIPVersion: TIdIPVersion;
FTTL: Byte;
public
procedure Reset;
property TTL : Byte read FTTL write FTTL;
//The computer that sent it to you
property SourceIP : String read FSourceIP write FSourceIP;
property SourcePort : TIdPort read FSourcePort write FSourcePort;
property SourceIF : UInt32 read FSourceIF write FSourceIF;
property SourceIPVersion : TIdIPVersion read FSourceIPVersion write FSourceIPVersion;
//you, the receiver - this is provided for multihomed machines
property DestIP : String read FDestIP write FDestIP;
property DestPort : TIdPort read FDestPort write FDestPort;
property DestIF : UInt32 read FDestIF write FDestIF;
property DestIPVersion : TIdIPVersion read FDestIPVersion write FDestIPVersion;
end;
TIdSocketListClass = class of TIdSocketList;
// Descend from only TObject. This objects is created a lot and should be fast
// and small
TIdSocketList = class(TObject)
protected
FLock: TIdCriticalSection;
//
function GetItem(AIndex: Integer): TIdStackSocketHandle; virtual; abstract;
public
constructor Create; virtual;
destructor Destroy; override;
procedure Add(AHandle: TIdStackSocketHandle); virtual; abstract;
function Clone: TIdSocketList; virtual; abstract;
function Count: Integer; virtual; abstract;
class function CreateSocketList: TIdSocketList;
property Items[AIndex: Integer]: TIdStackSocketHandle read GetItem; default;
procedure Remove(AHandle: TIdStackSocketHandle); virtual; abstract;
procedure Clear; virtual; abstract;
function ContainsSocket(AHandle: TIdStackSocketHandle): boolean; virtual; abstract;
procedure Lock;
class function Select(AReadList: TIdSocketList; AWriteList: TIdSocketList;
AExceptList: TIdSocketList; const ATimeout: Integer = IdTimeoutInfinite): Boolean; virtual;
function SelectRead(const ATimeout: Integer = IdTimeoutInfinite): Boolean; virtual; abstract;
function SelectReadList(var VSocketList: TIdSocketList; const ATimeout: Integer = IdTimeoutInfinite): Boolean; virtual; abstract;
procedure Unlock;
end;
TIdStackLocalAddress = class(TCollectionItem)
protected
FIPVersion: TIdIPVersion;
FIPAddress: String;
public
constructor Create(ACollection: TCollection; const AIPVersion: TIdIPVersion; const AIPAddress: string); reintroduce;
property IPVersion: TIdIPVersion read FIPVersion;
property IPAddress: String read FIPAddress;
end;
TIdStackLocalAddressIPv4 = class(TIdStackLocalAddress)
protected
FSubNetMask: String;
public
constructor Create(ACollection: TCollection; const AIPAddress, ASubNetMask: string); reintroduce;
property SubNetMask: String read FSubNetMask;
// TODO: add BroadcastIP
end;
TIdStackLocalAddressIPv6 = class(TIdStackLocalAddress)
public
constructor Create(ACollection: TCollection; const AIPAddress: string); reintroduce;
end;
TIdStackLocalAddressList = class(TCollection)
protected
function GetAddress(AIndex: Integer): TIdStackLocalAddress;
public
constructor Create; reintroduce;
function IndexOfIP(const AIP: String): Integer; overload;
function IndexOfIP(const AIP: String; AIPVersion: TIdIPVersion): Integer; overload;
property Addresses[AIndex: Integer]: TIdStackLocalAddress read GetAddress; default;
end;
TIdStack = class(TObject)
protected
FLocalAddresses: TStrings;
//
procedure IPVersionUnsupported;
function HostByName(const AHostName: string;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): string; virtual; abstract;
function MakeCanonicalIPv6Address(const AAddr: string): string; {$IFDEF HAS_DEPRECATED}deprecated{$IFDEF HAS_DEPRECATED_MSG} 'Use IdGlobal.MakeCanonicalIPv6Address()'{$ENDIF};{$ENDIF}
function ReadHostName: string; virtual; abstract;
function GetLocalAddress: string;
function GetLocalAddresses: TStrings;
public
function Accept(ASocket: TIdStackSocketHandle; var VIP: string; var VPort: TIdPort): TIdStackSocketHandle; overload;
function Accept(ASocket: TIdStackSocketHandle; var VIP: string; var VPort: TIdPort;
var VIPVersion: TIdIPVersion): TIdStackSocketHandle; overload; virtual; abstract;
procedure Bind(ASocket: TIdStackSocketHandle; const AIP: string;
const APort: TIdPort; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION ); virtual; abstract;
procedure Connect(const ASocket: TIdStackSocketHandle; const AIP: string;
const APort: TIdPort; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
constructor Create; virtual;
destructor Destroy; override;
procedure Disconnect(ASocket: TIdStackSocketHandle); virtual; abstract;
function IOControl(const s: TIdStackSocketHandle; const cmd: UInt32;
var arg: UInt32): Integer; virtual; abstract;
class procedure IncUsage; //create stack if necessary and inc counter
class procedure DecUsage; //decrement counter and free if it gets to zero
procedure GetPeerName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort); overload;
procedure GetPeerName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort; var VIPVersion: TIdIPVersion); overload; virtual; abstract;
procedure GetSocketName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort); overload;
procedure GetSocketName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort; var VIPVersion: TIdIPVersion); overload; virtual; abstract;
function HostByAddress(const AAddress: string;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): string; virtual; abstract;
function HostToNetwork(AValue: UInt16): UInt16; overload; virtual; abstract;
function HostToNetwork(AValue: UInt32): UInt32; overload; virtual; abstract;
function HostToNetwork(AValue: TIdUInt64): TIdUInt64; overload; virtual; abstract;
function HostToNetwork(const AValue: TIdIPv6Address): TIdIPv6Address; overload; virtual;
function IsIP(AIP: string): Boolean;
procedure Listen(ASocket: TIdStackSocketHandle; ABackLog: Integer); virtual; abstract;
function WSGetLastError: Integer; virtual; abstract;
procedure WSSetLastError(const AErr : Integer); virtual; abstract;
function WSTranslateSocketErrorMsg(const AErr: integer): string; virtual;
function CheckForSocketError(const AResult: Integer): Integer; overload;
function CheckForSocketError(const AResult: Integer; const AIgnore: array of Integer): Integer; overload;
procedure RaiseLastSocketError;
procedure RaiseSocketError(AErr: integer); virtual;
function NewSocketHandle(const ASocketType: TIdSocketType; const AProtocol: TIdSocketProtocol;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION; const AOverlapped: Boolean = False)
: TIdStackSocketHandle; virtual; abstract;
function NetworkToHost(AValue: UInt16): UInt16; overload; virtual; abstract;
function NetworkToHost(AValue: UInt32): UInt32; overload; virtual; abstract;
function NetworkToHost(AValue: TIdUInt64): TIdUInt64; overload; virtual; abstract;
function NetworkToHost(const AValue: TIdIPv6Address): TIdIPv6Address; overload; virtual;
procedure GetSocketOption(ASocket: TIdStackSocketHandle;
ALevel: TIdSocketOptionLevel; AOptName: TIdSocketOption;
out AOptVal: Integer); overload; virtual; abstract;
procedure SetSocketOption(ASocket: TIdStackSocketHandle; ALevel: TIdSocketOptionLevel;
AOptName: TIdSocketOption; AOptVal: Integer); overload; virtual; abstract;
function ResolveHost(const AHost: string;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): string;
// Result:
// > 0: Number of bytes received
// 0: Connection closed gracefully
// Will raise exceptions in other cases
function Receive(ASocket: TIdStackSocketHandle; var VBuffer: TIdBytes): Integer; virtual; abstract;
function Send(ASocket: TIdStackSocketHandle; const ABuffer: TIdBytes;
const AOffset: Integer = 0; const ASize: Integer = -1): Integer; virtual; abstract;
function ReceiveFrom(ASocket: TIdStackSocketHandle; var VBuffer: TIdBytes;
var VIP: string; var VPort: TIdPort; var VIPVersion: TIdIPVersion): Integer; virtual; abstract;
function SendTo(ASocket: TIdStackSocketHandle; const ABuffer: TIdBytes;
const AOffset: Integer; const AIP: string; const APort: TIdPort;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): Integer; overload;
function SendTo(ASocket: TIdStackSocketHandle; const ABuffer: TIdBytes;
const AOffset: Integer; const ASize: Integer; const AIP: string;
const APort: TIdPort; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION)
: Integer; overload; virtual; abstract;
function ReceiveMsg(ASocket: TIdStackSocketHandle; var VBuffer: TIdBytes;
APkt: TIdPacketInfo): UInt32; virtual; abstract;
function SupportsIPv6: Boolean; virtual; abstract;
//multicast stuff Kudzu permitted me to add here.
function IsValidIPv4MulticastGroup(const Value: string): Boolean;
function IsValidIPv6MulticastGroup(const Value: string): Boolean;
procedure SetKeepAliveValues(ASocket: TIdStackSocketHandle;
const AEnabled: Boolean; const ATimeMS, AInterval: Integer); virtual;
procedure SetMulticastTTL(AHandle: TIdStackSocketHandle;
const AValue : Byte; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
procedure SetLoopBack(AHandle: TIdStackSocketHandle; const AValue: Boolean;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
procedure DropMulticastMembership(AHandle: TIdStackSocketHandle;
const AGroupIP, ALocalIP : String; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
procedure AddMulticastMembership(AHandle: TIdStackSocketHandle;
const AGroupIP, ALocalIP : String; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
//I know this looks like an odd place to put a function for calculating a
//packet checksum. There is a reason for it though. The reason is that
//you need it for ICMPv6 and in Windows, you do that with some other stuff
//in the stack descendants
function CalcCheckSum(const AData : TIdBytes): UInt16; virtual;
//In Windows, this writes a checksum into a buffer. In Linux, it would probably
//simply have the kernal write the checksum with something like this (RFC 2292):
//
// int offset = 2;
// setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, sizeof(offset));
//
// Note that this should be called
//IMMEDIATELY before you do a SendTo because the Local IPv6 address might change
procedure WriteChecksum(s : TIdStackSocketHandle;
var VBuffer : TIdBytes; const AOffset : Integer; const AIP : String;
const APort : TIdPort; const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION); virtual; abstract;
//
procedure AddLocalAddressesToList(AAddresses: TStrings); {$IFDEF HAS_DEPRECATED}deprecated{$IFDEF HAS_DEPRECATED_MSG} 'use GetLocalAddressList()'{$ENDIF};{$ENDIF}
procedure GetLocalAddressList(AAddresses: TIdStackLocalAddressList); virtual; abstract;
//
// Properties
//
property HostName: string read ReadHostName;
property LocalAddress: string read GetLocalAddress; // {$IFDEF HAS_DEPRECATED}deprecated{$IFDEF HAS_DEPRECATED_MSG} 'use GetLocalAddressList()'{$ENDIF};{$ENDIF}
property LocalAddresses: TStrings read GetLocalAddresses; // {$IFDEF HAS_DEPRECATED}deprecated{$IFDEF HAS_DEPRECATED_MSG} 'use GetLocalAddressList()'{$ENDIF};{$ENDIF}
end;
TIdStackClass = class of TIdStack;
var
GStack: TIdStack = nil;
GServeFileProc: TIdServeFile = nil;
GSocketListClass: TIdSocketListClass;
// Procedures
procedure SetStackClass( AStackClass: TIdStackClass );
{$IFDEF USE_VCL_POSIX}
{$IFDEF ANDROID}
function HasAndroidPermission(const Permission: string): Boolean;
{$ENDIF}
{$ENDIF}
implementation
{$O-}
uses
//done this way so we can have a separate stack for FPC under Unix systems
{$IFDEF UNIX}
{$IFDEF USE_VCL_POSIX}
IdStackVCLPosix,
{$ENDIF}
{$IFDEF KYLIXCOMPAT}
IdStackLibc,
{$ENDIF}
{$IFDEF USE_BASEUNIX}
IdStackUnix,
{$ENDIF}
{$ENDIF}
{$IFDEF WINDOWS}
{$IFDEF USE_INLINE}
Windows,
{$ENDIF}
IdStackWindows,
{$ENDIF}
{$IFDEF DOTNET}
IdStackDotNet,
{$ENDIF}
{$IFDEF USE_VCL_POSIX}
{$IFDEF ANDROID}
FMX.Helpers.Android,
{$IFDEF VCL_XE6_OR_ABOVE}
// StringToJString() was moved here in XE6
Androidapi.Helpers,
{$ENDIF}
Androidapi.JNI.JavaTypes,
Androidapi.JNI.GraphicsContentViewText,
{$ENDIF}
{$ENDIF}
IdResourceStrings;
var
GStackClass: TIdStackClass = nil;
var
GInstanceCount: UInt32 = 0;
GStackCriticalSection: TIdCriticalSection = nil;
//for IPv4 Multicast address chacking
const
IPv4MCastLo = 224;
IPv4MCastHi = 239;
procedure SetStackClass(AStackClass: TIdStackClass);
begin
GStackClass := AStackClass;
end;
procedure TIdPacketInfo.Reset;
begin
FSourceIP := '';
FSourcePort := 0;
FSourceIF := 0;
FSourceIPVersion := ID_DEFAULT_IP_VERSION;
FDestIP := '';
FDestPort:= 0;
FDestIF := 0;
FDestIPVersion := ID_DEFAULT_IP_VERSION;
FTTL := 0;
end;
{ TIdSocketList }
constructor TIdSocketList.Create;
begin
inherited Create;
FLock := TIdCriticalSection.Create;
end;
class function TIdSocketList.CreateSocketList: TIdSocketList;
Begin
Result := GSocketListClass.Create;
End;
destructor TIdSocketList.Destroy;
begin
FreeAndNil(FLock);
inherited Destroy;
end;
procedure TIdSocketList.Lock;
begin
FLock.Acquire;
end;
class function TIdSocketList.Select(AReadList, AWriteList,
AExceptList: TIdSocketList; const ATimeout: Integer): Boolean;
begin
// C++ Builder cannot have abstract class functions thus we need this base
Result := False;
end;
procedure TIdSocketList.Unlock;
begin
FLock.Release;
end;
{ EIdSocketError }
constructor EIdSocketError.CreateError(const AErr: Integer; const AMsg: string);
begin
inherited Create(AMsg);
FLastError := AErr;
end;
{ TIdStackLocalAddressList }
constructor TIdStackLocalAddress.Create(ACollection: TCollection; const AIPVersion: TIdIPVersion; const AIPAddress: string);
begin
inherited Create(ACollection);
FIPVersion := AIPVersion;
FIPAddress := AIPAddress;
end;
constructor TIdStackLocalAddressIPv4.Create(ACollection: TCollection; const AIPAddress, ASubNetMask: string);
begin
inherited Create(ACollection, Id_IPv4, AIPAddress);
FSubNetMask := ASubNetMask;
end;
constructor TIdStackLocalAddressIPv6.Create(ACollection: TCollection; const AIPAddress: string);
begin
inherited Create(ACollection, Id_IPv6, AIPAddress);
end;
constructor TIdStackLocalAddressList.Create;
begin
inherited Create(TIdStackLocalAddress);
end;
function TIdStackLocalAddressList.GetAddress(AIndex: Integer): TIdStackLocalAddress;
begin
Result := TIdStackLocalAddress(inherited Items[AIndex]);
end;
function TIdStackLocalAddressList.IndexOfIP(const AIP: String): Integer;
var
I: Integer;
begin
Result := -1;
for I := 0 to Count-1 do begin
if Addresses[I].IPAddress = AIP then begin
Result := I;
Exit;
end;
end;
end;
function TIdStackLocalAddressList.IndexOfIP(const AIP: String; AIPVersion: TIdIPVersion): Integer;
var
I: Integer;
LAddr: TIdStackLocalAddress;
begin
Result := -1;
for I := 0 to Count-1 do begin
LAddr := Addresses[I];
if (LAddr.IPVersion = AIPVersion) and (LAddr.IPAddress = AIP) then begin
Result := I;
Exit;
end;
end;
end;
{ TIdStack }
constructor TIdStack.Create;
begin
// Here for .net
inherited Create;
end;
destructor TIdStack.Destroy;
begin
FreeAndNil(FLocalAddresses);
inherited Destroy;
end;
procedure TIdStack.IPVersionUnsupported;
begin
raise EIdIPVersionUnsupported.Create(RSIPVersionUnsupported);
end;
function TIdStack.Accept(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort): TIdStackSocketHandle;
var
LIPVersion: TIdIPVersion;
begin
Result := Accept(ASocket, VIP, VPort, LIPVersion);
end;
procedure TIdStack.GetPeerName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort);
var
LIPVersion: TIdIPVersion;
begin
GetPeerName(ASocket, VIP, VPort, LIPVersion);
end;
procedure TIdStack.GetSocketName(ASocket: TIdStackSocketHandle; var VIP: string;
var VPort: TIdPort);
var
LIPVersion: TIdIPVersion;
begin
GetSocketName(ASocket, VIP, VPort, LIPVersion);
end;
{$I IdDeprecatedImplBugOff.inc}
procedure TIdStack.AddLocalAddressesToList(AAddresses: TStrings);
{$I IdDeprecatedImplBugOn.inc}
var
LList: TIdStackLocalAddressList;
I: Integer;
begin
LList := TIdStackLocalAddressList.Create;
try
// for backwards compatibility, return only IPv4 addresses
GetLocalAddressList(LList);
if LList.Count > 0 then begin
AAddresses.BeginUpdate;
try
for I := 0 to LList.Count-1 do begin
if LList[I].IPVersion = Id_IPv4 then begin
AAddresses.Add(LList[I].IPAddress);
end;
end;
finally
AAddresses.EndUpdate;
end;
end;
finally
LList.Free;
end;
end;
function TIdStack.GetLocalAddresses: TStrings;
var
LList: TIdStackLocalAddressList;
I: Integer;
begin
if FLocalAddresses = nil then begin
FLocalAddresses := TStringList.Create;
end;
FLocalAddresses.BeginUpdate;
try
FLocalAddresses.Clear;
LList := TIdStackLocalAddressList.Create;
try
// for backwards compatibility, return only IPv4 addresses
GetLocalAddressList(LList);
for I := 0 to LList.Count-1 do begin
if LList[I].IPVersion = Id_IPv4 then begin
FLocalAddresses.Add(LList[I].IPAddress);
end;
end;
finally
LList.Free;
end;
finally
FLocalAddresses.EndUpdate;
end;
Result := FLocalAddresses;
end;
function TIdStack.GetLocalAddress: string;
var
LList: TIdStackLocalAddressList;
I: Integer;
begin
// RLebeau: using a local list instead of the LocalAddresses
// property so this method can be thread-safe...
//
// old code:
// Result := LocalAddresses[0];
Result := '';
LList := TIdStackLocalAddressList.Create;
try
// for backwards compatibility, return only IPv4 addresses
GetLocalAddressList(LList);
for I := 0 to LList.Count-1 do begin
if LList[I].IPVersion = Id_IPv4 then begin
Result := LList[I].IPAddress;
Exit;
end;
end;
finally
LList.Free;
end;
end;
function TIdStack.IsIP(AIP: string): Boolean;
var
i: Integer;
begin
// TODO: support IPv6
//
//Result := Result and ((i > 0) and (i < 256));
//
i := IndyStrToInt(Fetch(AIP, '.'), -1); {Do not Localize}
Result := (i > -1) and (i < 256);
i := IndyStrToInt(Fetch(AIP, '.'), -1); {Do not Localize}
Result := Result and ((i > -1) and (i < 256));
i := IndyStrToInt(Fetch(AIP, '.'), -1); {Do not Localize}
Result := Result and ((i > -1) and (i < 256));
i := IndyStrToInt(Fetch(AIP, '.'), -1); {Do not Localize}
Result := Result and ((i > -1) and (i < 256)) and (AIP = '');
end;
{$I IdDeprecatedImplBugOff.inc}
function TIdStack.MakeCanonicalIPv6Address(const AAddr: string): string;
{$I IdDeprecatedImplBugOn.inc}
begin
Result := IdGlobal.MakeCanonicalIPv6Address(AAddr);
end;
function TIdStack.ResolveHost(const AHost: string;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): string;
begin
Result := '';
case AIPVersion of
Id_IPv4: begin
// Sometimes 95 forgets who localhost is
if TextIsSame(AHost, 'LOCALHOST') then begin {Do not Localize}
Result := '127.0.0.1'; {Do not Localize}
end else if IsIP(AHost) then begin
Result := AHost;
end else begin
Result := HostByName(AHost, Id_IPv4);
end;
end;
Id_IPv6: begin
if TextIsSame(AHost, 'LOCALHOST') then begin {Do not Localize}
Result := '::1'; {Do not Localize}
end else begin
Result := IdGlobal.MakeCanonicalIPv6Address(AHost);
if Result = '' then begin
Result := HostByName(AHost, Id_IPv6);
end;
end;
end;
else begin
IPVersionUnsupported;
end;
end;
end;
function TIdStack.SendTo(ASocket: TIdStackSocketHandle; const ABuffer: TIdBytes;
const AOffset: Integer; const AIP: string; const APort: TIdPort;
const AIPVersion: TIdIPVersion = ID_DEFAULT_IP_VERSION): Integer;
begin
Result := SendTo(ASocket, ABuffer, AOffset, -1, AIP, APort, AIPVersion);
end;
class procedure TIdStack.DecUsage;
begin
Assert(GStackCriticalSection<>nil);
GStackCriticalSection.Acquire;
try
// This CS will guarantee that during the FreeAndNil nobody
// will try to use or construct GStack
if GInstanceCount > 0 then begin
Dec(GInstanceCount);
if GInstanceCount = 0 then begin
FreeAndNil(GStack);
end;
end;
finally
GStackCriticalSection.Release;
end;
end;
class procedure TIdStack.IncUsage;
begin
Assert(GStackCriticalSection<>nil);
GStackCriticalSection.Acquire;
try
if GInstanceCount = 0 then begin
if GStack <> nil then begin
raise EIdException.Create(RSStackAlreadyCreated);
end;
if GStackClass = nil then begin
raise EIdException.Create(RSStackClassUndefined);
end;
GStack := GStackClass.Create;
end;
Inc(GInstanceCount);
finally
GStackCriticalSection.Release;
end;
end;
function TIdStack.CheckForSocketError(const AResult: Integer): Integer;
begin
if AResult = Integer(Id_SOCKET_ERROR) then begin
RaiseLastSocketError;
end;
Result := AResult;
end;
function TIdStack.CheckForSocketError(const AResult: Integer;
const AIgnore: array of integer): Integer;
var
i: Integer;
LLastError: Integer;
begin
Result := AResult;
if AResult = Integer(Id_SOCKET_ERROR) then begin
LLastError := WSGetLastError;
for i := Low(AIgnore) to High(AIgnore) do begin
if LLastError = AIgnore[i] then begin
Result := LLastError;
Exit;
end;
end;
RaiseSocketError(LLastError);
end;
end;
procedure TIdStack.RaiseLastSocketError;
begin
RaiseSocketError(WSGetLastError);
end;
{$IFDEF USE_VCL_POSIX}
{$IFDEF ANDROID}
function HasAndroidPermission(const Permission: string): Boolean;
begin
Result := SharedActivityContext.checkCallingOrSelfPermission(StringToJString(Permission)) = TJPackageManager.JavaClass.PERMISSION_GRANTED;
end;
{$ENDIF}
{$ENDIF}
procedure TIdStack.RaiseSocketError(AErr: integer);
begin
(*
RRRRR EEEEEE AAAA DDDDD MM MM EEEEEE !! !! !!
RR RR EE AA AA DD DD MMMM MMMM EE !! !! !!
RRRRR EEEE AAAAAA DD DD MM MMM MM EEEE !! !! !!
RR RR EE AA AA DD DD MM MM EE
RR RR EEEEEE AA AA DDDDD MM MM EEEEEE .. .. ..
Please read the note in the next comment.
*)
if AErr = Id_WSAENOTSOCK then begin
// You can add this to your exception ignore list for easier debugging.
// However please note that sometimes it is a true error. Your program
// will still run correctly, but the debugger will not stop on it if you
// list it in the ignore list. But for most times its fine to put it in
// the ignore list, it only affects your debugging.
raise EIdNotASocket.CreateError(AErr, WSTranslateSocketErrorMsg(AErr));
end;
{$IFDEF USE_VCL_POSIX}
{$IFDEF ANDROID}
if (AErr = 9{EBADF}) or (AErr = 12{EBADR?}) or (AErr = 13{EACCES}) then begin
if not HasAndroidPermission('android.permission.INTERNET') then begin {Do not Localize}
raise EIdInternetPermissionNeeded.CreateError(AErr, WSTranslateSocketErrorMsg(AErr));
end;
end;
{$ENDIF}
{$ENDIF}
(*
It is normal to receive a 10038 exception (10038, NOT others!) here when
*shutting down* (NOT at other times!) servers (NOT clients!).
If you receive a 10038 exception here please see the FAQ at:
http://www.IndyProject.org/
If you insist upon requesting help via our email boxes on the 10038 error
that is already answered in the FAQ and you are simply too slothful to
search for your answer and ask your question in the public forums you may be
publicly flogged, tarred and feathered and your name may be added to every
chain letter / EMail in existence today."
Otherwise, if you DID read the FAQ and have further questions, please feel
free to ask using one of the methods (Carefullly note that these methods do
not list email) listed on the Tech Support link at:
http://www.IndyProject.org/
RRRRR EEEEEE AAAA DDDDD MM MM EEEEEE !! !! !!
RR RR EE AA AA DD DD MMMM MMMM EE !! !! !!
RRRRR EEEE AAAAAA DD DD MM MMM MM EEEE !! !! !!
RR RR EE AA AA DD DD MM MM EE
RR RR EEEEEE AA AA DDDDD MM MM EEEEEE .. .. ..
*)
raise EIdSocketError.CreateError(AErr, WSTranslateSocketErrorMsg(AErr));
end;
function TIdStack.WSTranslateSocketErrorMsg(const AErr: integer): string;
begin
Result := ''; {Do not Localize}
case AErr of
Id_WSAEINTR: Result := RSStackEINTR;
Id_WSAEBADF: Result := RSStackEBADF;
Id_WSAEACCES: Result := RSStackEACCES;
Id_WSAEFAULT: Result := RSStackEFAULT;
Id_WSAEINVAL: Result := RSStackEINVAL;
Id_WSAEMFILE: Result := RSStackEMFILE;
Id_WSAEWOULDBLOCK: Result := RSStackEWOULDBLOCK;
Id_WSAEINPROGRESS: Result := RSStackEINPROGRESS;
Id_WSAEALREADY: Result := RSStackEALREADY;
Id_WSAENOTSOCK: Result := RSStackENOTSOCK;
Id_WSAEDESTADDRREQ: Result := RSStackEDESTADDRREQ;
Id_WSAEMSGSIZE: Result := RSStackEMSGSIZE;
Id_WSAEPROTOTYPE: Result := RSStackEPROTOTYPE;
Id_WSAENOPROTOOPT: Result := RSStackENOPROTOOPT;
Id_WSAEPROTONOSUPPORT: Result := RSStackEPROTONOSUPPORT;
{$IFNDEF BEOS}
Id_WSAESOCKTNOSUPPORT: Result := RSStackESOCKTNOSUPPORT;
{$ENDIF}
Id_WSAEOPNOTSUPP: Result := RSStackEOPNOTSUPP;
Id_WSAEPFNOSUPPORT: Result := RSStackEPFNOSUPPORT;
Id_WSAEAFNOSUPPORT: Result := RSStackEAFNOSUPPORT;
Id_WSAEADDRINUSE: Result := RSStackEADDRINUSE;
Id_WSAEADDRNOTAVAIL: Result := RSStackEADDRNOTAVAIL;
Id_WSAENETDOWN: Result := RSStackENETDOWN;
Id_WSAENETUNREACH: Result := RSStackENETUNREACH;
Id_WSAENETRESET: Result := RSStackENETRESET;
Id_WSAECONNABORTED: Result := RSStackECONNABORTED;
Id_WSAECONNRESET: Result := RSStackECONNRESET;
Id_WSAENOBUFS: Result := RSStackENOBUFS;
Id_WSAEISCONN: Result := RSStackEISCONN;
Id_WSAENOTCONN: Result := RSStackENOTCONN;
Id_WSAESHUTDOWN: Result := RSStackESHUTDOWN;
{$IFNDEF BEOS}
Id_WSAETOOMANYREFS: Result := RSStackETOOMANYREFS;
{$ENDIF}
Id_WSAETIMEDOUT: Result := RSStackETIMEDOUT;
Id_WSAECONNREFUSED: Result := RSStackECONNREFUSED;
Id_WSAELOOP: Result := RSStackELOOP;
Id_WSAENAMETOOLONG: Result := RSStackENAMETOOLONG;
Id_WSAEHOSTDOWN: Result := RSStackEHOSTDOWN;
Id_WSAEHOSTUNREACH: Result := RSStackEHOSTUNREACH;
Id_WSAENOTEMPTY: Result := RSStackENOTEMPTY;
end;
Result := IndyFormat(RSStackError, [AErr, Result]);
end;
function TIdStack.HostToNetwork(const AValue: TIdIPv6Address): TIdIPv6Address;
var
i : Integer;
begin
for i := 0 to 7 do begin
Result[i] := HostToNetwork(AValue[i]);
end;
end;
function TIdStack.NetworkToHost(const AValue: TIdIPv6Address): TIdIPv6Address;
var
i : Integer;
begin
for i := 0 to 7 do begin
Result[i] := NetworkToHost(AValue[i]);
end;
end;
function TIdStack.IsValidIPv4MulticastGroup(const Value: string): Boolean;
var
LIP: string;
LVal: Integer;
begin
Result := False;
if IsIP(Value) then
begin
LIP := Value;
LVal := IndyStrToInt(Fetch(LIP, '.')); {Do not Localize}
Result := (LVal >= IPv4MCastLo) and (LVal <= IPv4MCastHi);
end;
end;
{ From "rfc 2373"
2.7 Multicast Addresses
An IPv6 multicast address is an identifier for a group of nodes. A
node may belong to any number of multicast groups. Multicast
addresses have the following format:
#
| 8 | 4 | 4 | 112 bits |
+------ -+----+----+---------------------------------------------+
|11111111|flgs|scop| group ID |
+--------+----+----+---------------------------------------------+
11111111 at the start of the address identifies the address as
being a multicast address.
+-+-+-+-+
flgs is a set of 4 flags: |0|0|0|T|
+-+-+-+-+
The high-order 3 flags are reserved, and must be initialized to
0.
T = 0 indicates a permanently-assigned ("well-known") multicast
address, assigned by the global internet numbering authority.
T = 1 indicates a non-permanently-assigned ("transient")
multicast address.
scop is a 4-bit multicast scope value used to limit the scope of
the multicast group. The values are:
0 reserved
1 node-local scope
2 link-local scope
3 (unassigned)
4 (unassigned)
5 site-local scope
6 (unassigned)
7 (unassigned)
8 organization-local scope
9 (unassigned)
A (unassigned)
B (unassigned)
C (unassigned)
D (unassigned)
E global scope
F reserved
group ID identifies the multicast group, either permanent or
transient, within the given scope.
The "meaning" of a permanently-assigned multicast address is
independent of the scope value. For example, if the "NTP servers
group" is assigned a permanent multicast address with a group ID of
101 (hex), then:
FF01:0:0:0:0:0:0:101 means all NTP servers on the same node as the
sender.
FF02:0:0:0:0:0:0:101 means all NTP servers on the same link as the
sender.
FF05:0:0:0:0:0:0:101 means all NTP servers at the same site as the
sender.
FF0E:0:0:0:0:0:0:101 means all NTP servers in the internet.
Non-permanently-assigned multicast addresses are meaningful only
within a given scope. For example, a group identified by the non-
permanent, site-local multicast address FF15:0:0:0:0:0:0:101 at one
site bears no relationship to a group using the same address at a
different site, nor to a non-permanent group using the same group ID
with different scope, nor to a permanent group with the same group
ID.
Multicast addresses must not be used as source addresses in IPv6
packets or appear in any routing header.
}
function TIdStack.IsValidIPv6MulticastGroup(const Value: string): Boolean;
var
LTmp : String;
begin
LTmp := IdGlobal.MakeCanonicalIPv6Address(Value);
if LTmp <> '' then
begin
Result := TextStartsWith(LTmp, 'FF');
end else begin
Result := False;
end;
end;
function TIdStack.CalcCheckSum(const AData: TIdBytes): UInt16;
var
i : Integer;
LSize : Integer;
LCRC : UInt32;
begin
LCRC := 0;
i := 0;
LSize := Length(AData);
while LSize > 1 do
begin
LCRC := LCRC + BytesToUInt16(AData, i);
Dec(LSize, 2);
Inc(i, 2);
end;
if LSize > 0 then begin
LCRC := LCRC + AData[i];
end;
LCRC := (LCRC shr 16) + (LCRC and $ffff); //(LCRC >> 16)
LCRC := LCRC + (LCRC shr 16);
Result := not UInt16(LCRC);
end;
{$UNDEF HAS_TCP_KEEPIDLE_OR_KEEPINTVL}
{$IFDEF HAS_TCP_KEEPIDLE}
{$DEFINE HAS_TCP_KEEPIDLE_OR_KEEPINTVL}
{$ENDIF}
{$IFDEF HAS_TCP_KEEPINTVL}
{$DEFINE HAS_TCP_KEEPIDLE_OR_KEEPINTVL}
{$ENDIF}
procedure TIdStack.SetKeepAliveValues(ASocket: TIdStackSocketHandle;
const AEnabled: Boolean; const ATimeMS, AInterval: Integer);
begin
SetSocketOption(ASocket, Id_SOL_SOCKET, Id_SO_KEEPALIVE, iif(AEnabled, 1, 0));
{$IFDEF HAS_TCP_KEEPIDLE_OR_KEEPINTVL}
if AEnabled then
begin
// TODO: support TCP_KEEPCNT
{$IFDEF HAS_TCP_KEEPIDLE}
SetSocketOption(ASocket, Id_SOL_TCP, Id_TCP_KEEPIDLE, ATimeMS);
{$ENDIF}
{$IFDEF HAS_TCP_KEEPINTVL}
SetSocketOption(ASocket, Id_SOL_TCP, Id_TCP_KEEPINTVL, AInterval);
{$ENDIF}
end;
{$ENDIF}
end;
initialization
//done this way so we can have a separate stack just for FPC under Unix systems
GStackClass :=
{$IFDEF USE_VCL_POSIX}
TIdStackVCLPosix
{$ELSE}
{$IFDEF UNIX}
{$IFDEF KYLIXCOMPAT}
TIdStackLibc
{$ENDIF}
{$IFDEF USE_BASEUNIX}
TIdStackUnix
{$ENDIF}
{$ENDIF}
{$IFDEF WINDOWS}
TIdStackWindows
{$ENDIF}
{$IFDEF DOTNET}
TIdStackDotNet
{$ENDIF}
{$ENDIF}
;
GStackCriticalSection := TIdCriticalSection.Create;
{$IFNDEF DOTNET}
{$IFDEF REGISTER_EXPECTED_MEMORY_LEAK}
IndyRegisterExpectedMemoryLeak(GStackCriticalSection);
{$ENDIF}
{$ENDIF}
finalization
// Dont Free. If shutdown is from another Init section, it can cause GPF when stack
// tries to access it. App will kill it off anyways, so just let it leak
{$IFDEF FREE_ON_FINAL}
FreeAndNil(GStackCriticalSection);
{$ENDIF}
end.
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