僅在ipv6網絡上使用Indy IdTelnet

Question

Apple App Store需要應用程序才能在僅限ipv6的網絡上工作。 如何使IdTelnet在這樣的網絡上工作？

Answer 1

TIdTelnet具有IPVersion屬性，但聲明爲protected，因此不能直接由用戶代碼訪問。爲了設置IPVersion，你可以聲明一個黑客類，如：

uses 
    .., IdStack, IdGlobal, .. 

type 
    TIdTelnetHack = class(TIdTelnet) 
    published 
    property IPVersion; //expose protected property 
    end; 

procedure TForm1.TelnetConnect(const aHost:String); 
var 
    aIPVersion: TIdIPVersion; 
begin 
    if not IdTelnet1.Connected then 
    begin //not connected. go connect 
    // check if ipv6 or ipv4 network, and support both, 
    try 
     GStack.ResolveHost(aHost, Id_IPv6); 
     aIPVersion := Id_IPV6; 
    except 
     GStack.ResolveHost(aHost, Id_IPv4); 
     aIPVersion := Id_IPV4; 
    end; 

    IdTelnet1.Host := aHost; 
    IdTelnet1.Port := 8090; 
    TIdTelnetHack(IdTelnet1).IPVersion := aIPVersion; //set to IPv4 or IPv6 

    IdTelnet1.Connect; 
    end; 
end; 

要測試IPv6網絡上你的應用程序，設置你的Mac作爲IPv6的接入點，因爲這裏說明：

Supporting IPv6 DNS64/NAT64 Networks