Delphi iOS IPv6 麻烦。请确保您的应用与 IPv6 网络兼容

Question

我无法将我的 iOS 应用发布到 AppStore。

Delphi 10.1.2 Berlin，iOS64，Win 8.1。

我收到了来自苹果的下一条信息：

感谢您的回复。

请确保您的应用与 IPv6 网络兼容。

测试应用程序的 IPv6 兼容性的最简单方法是在 Mac 上设置本地 IPv6 网络。然后，您可以从 iOS 设备连接到网络以测试 IPv6 兼容性。

请按照支持 IPv6 DNS64/NAT64 网络中提供的分步说明进行操作。

有关支持 IPv6 网络的更多信息，请查看支持 IPv6-only Networks。

---

这是连接代码。

     if (FSocket<>nil) then
     begin
          if not FSocket.Connected then
          begin
               SetState(mwtrstDisConnected);
               FSocket.Free;
               FSocket:=nil;
          end
          else
              exit;
     end;

     FSocket:=TIdTCPClient.Create(nil);
     FSocket.Host:=FHost;
     FSocket.Port:=FPort;

//CheckCode


{$ifdef KBMMW_USING_INDY_9_OR_NEWER}
     FSocket.BoundPortMin:=FMinClientPort;
     FSocket.BoundPortMax:=FMaxClientPort;
{$endif}

{$IFDEF KBMMW_USING_INDY_10}
     FSocket.ReadTimeout:=RequestTimeout*1000;
     FSocket.ConnectTimeout:=ConnectTimeout*1000;
{$ENDIF}
{$IFDEF KBMMW_USING_INDY_8_00_23}
     FSocket.Connect;
{$ELSE}
 {$IFDEF KBMMW_USING_INDY_9}
     FSocket.Connect(ConnectTimeout*1000);
 {$ELSE}
     FSocket.Connect;
 {$ENDIF}
{$ENDIF}
     DoConnected(Info);

在我看来，我必须在 //CheckCode 位置插入下一个代码。

  TIdStack.IncUsage;
  IdURI := TIdURI.Create('195.34.x.x');
  try
    try
      ss := GStack.ResolveHost(IdURI.Host, TIdIPVersion.Id_IPv6);
      IdURI.IPVersion := TIdIPVersion.Id_IPv6;
    except
      IdURI.IPVersion := TIdIPVersion.Id_IPv4; // Just in case.
    end;

    //ShowMessage(ss);
  finally
    FreeAndNil(IdURI);
    TIdStack.DecUsage;
  end;

但此代码 (GStack.ResolveHost) 在 iOS 上不起作用。

如何解决？

Answer 1

试试类似的方法：

FSocket := TIdTCPClient.Create(nil);
FSocket.Host := FHost;
FSocket.Port := FPort;

{$IFDEF KBMMW_USING_INDY_9_OR_NEWER}
FSocket.BoundPortMin := FMinClientPort;
FSocket.BoundPortMax := FMaxClientPort;
{$ENDIF}

{$IFDEF KBMMW_USING_INDY_10}
FSocket.ReadTimeout := RequestTimeout*1000;
FSocket.ConnectTimeout := ConnectTimeout*1000;

// check if connecting to an IPv4/IPv6 address directly...
if GStack.IsIP(FHost) then // only checks for IPv4 right now
begin
  FSocket.IPVersion := Id_IPv4;
  FSocket.Connect;
end
else if MakeCanonicalIPv6Address(FHost) <> '' then
begin
  FSocket.IPVersion := Id_IPv6;
  FSocket.Connect;
end
else begin
  // connecting to a hostname, try IPv6 first, then fallback to IPv4...
  try
    FSocket.IPVersion := Id_IPv6;
    FSocket.Connect;
  except
    FSocket.IPVersion := Id_IPv4;
    FSocket.Connect;
  end;
end;
{$ELSE}
  // only IPv4 is supported...
  {$IFDEF KBMMW_USING_INDY_9}
FSocket.Connect(ConnectTimeout*1000);
  {$ELSE}
FSocket.Connect;
  {$ENDIF}
{$ENDIF}

DoConnected(Info);

或者：

var
  LIPAddress: TIdIPAddress;
  LLocalIPs: TIdStackLocalAddressList;
  TryIPv4, TryIPv6: Boolean;
  I: Integer;

...

FSocket := TIdTCPClient.Create(nil);
FSocket.Host := FHost;
FSocket.Port := FPort;

{$IFDEF KBMMW_USING_INDY_9_OR_NEWER}
FSocket.BoundPortMin := FMinClientPort;
FSocket.BoundPortMax := FMaxClientPort;
{$ENDIF}

{$IFDEF KBMMW_USING_INDY_10}
FSocket.ReadTimeout := RequestTimeout*1000;
FSocket.ConnectTimeout := ConnectTimeout*1000;

LIPAddress := TIdIPAddress.MakeAddressObject(FHost);
if LIPAddress <> nil then
begin
  // connecting to an IPv4/IPv6 address...
  FSocket.IPVersion := LIPAddress.AddrType;
  LIPAddress.Free;
  FSocket.Connect;
end else
begin
  // connecting to a hostname...

  TryIPv4 := False;
  TryIPv6 := False;

  LLocalIPs := TIdStackLocalAddressList.Create;
  try
    GStack.GetLocalAddressList(LLocalIPs);
    for I := 0 to LLocalIPs.Count-1 do
    begin
      case LLocalIPs[I].IPVersion of
        Id_IPv4: TryIPv4 := True;
        Id_IPv6: TryIPv6 := True;
      end;
    end;
  finally
    List.Free;
  end;

  if TryIPv6 then
  begin
    try
      FSocket.IPVersion := Id_IPv6;
      FSocket.Connect;
      TryIPv4 := False;
    except
      if not TryIPv4 then
        raise;
    end;
  end;

  if TryIPv4 then
  begin
    FSocket.IPVersion := Id_IPv4;
    FSocket.Connect;
  end;

  if not (TryIPv4 or TryIPv6) then
    raise Exception.Create('Not connected to an IPv4 or IPv6 network');
end;
{$ELSE}
  // only IPv4 is supported...
  {$IFDEF KBMMW_USING_INDY_9}
FSocket.Connect(ConnectTimeout*1000);
  {$ELSE}
FSocket.Connect;
  {$ENDIF}
{$ENDIF}

DoConnected(Info);

请注意，一旦 Indy 实现了以下功能，这种情况将变得更容易处理，但我认为这还有一段路要走：

Support round-robin DNS (support connecting to IPv4/IPv6 hostnames)