IP Adresse eines Netzwerkadapters

[Passi077]

Hi,

ich will die aktuelle IP Adresse von allen verfügbaren Netzwerkadaptern auslesen. Durch die Forensuche bin ich dann an die Funktion GetPerAdapterInfo gestoßen und habe aich ein paar Code Beispiele gefunden:

Delphi-Quellcode:

const
  MAX_ADAPTER_DESCRIPTION_LENGTH  = 128; // arb. 
  MAX_ADAPTER_NAME_LENGTH         = 256; // arb. 
  MAX_ADAPTER_ADDRESS_LENGTH      = 8;   // arb. 

type
  PIP_ADDRESS_STRING = ^IP_ADDRESS_STRING; 
  IP_ADDRESS_STRING = packed record 
    acString : array [1..16] of Char; 
  end; 

  PIP_MASK_STRING = ^PIP_MASK_STRING; 
  IP_MASK_STRING = IP_ADDRESS_STRING; 

  PIP_ADDR_STRING = ^IP_ADDR_STRING; 
  IP_ADDR_STRING = packed record 
    Next      : PIP_ADDR_STRING; 
    IpAddress : IP_ADDRESS_STRING;
    IpMask    : IP_MASK_STRING;
    Context   : DWORD; 
  end; 

  time_t = int64; 

  PIP_ADAPTER_INFO = ^IP_ADAPTER_INFO; 
  IP_ADAPTER_INFO =  packed record 
    Next                : PIP_ADAPTER_INFO; 
    ComboIndex          : DWORD; 
    AdapterName         : array [1..MAX_ADAPTER_NAME_LENGTH+4] of Char ; 
    Description         : array [1..MAX_ADAPTER_DESCRIPTION_LENGTH+4] of Char; 
    AddressLength       : UINT; 
    Address             : array [1..MAX_ADAPTER_ADDRESS_LENGTH] of Byte; 
    Index               : DWORD; 
    dwType              : UINT; 
    DhcpEnabled         : UINT;
    CurrentIpAddress    : PIP_ADDR_STRING;
    IpAddressList       : IP_ADDR_STRING; 
    GatewayList         : IP_ADDR_STRING; 
    DhcpServer          : IP_ADDR_STRING; 
    HaveWins            : Boolean; 
    PrimaryWinsServer   : IP_ADDR_STRING; 
    SecondaryWinsServer : IP_ADDR_STRING; 
    LeaseObtained       : time_t; 
    LeaseExpires        : time_t; 
  end; 

  PIP_PER_ADAPTER_INFO = ^IP_PER_ADAPTER_INFO; 
  IP_PER_ADAPTER_INFO = packed record 
    AutoConfigEnabled : UINT; 
    AutoConfigActive  : UINT;
    CurrentDnsServer  : PIP_ADDR_STRING;
    DnsServerList     : IP_ADDR_STRING; 
  end; 


function GetAdaptersInfo(const pAdapterInfo : PIP_ADAPTER_INFO;const pOutBufLen : PULONG) : DWORD; stdcall;
function GetPerAdapterInfo(const pIfIndex : ULONG;const pAdapterInfo : PIP_PER_ADAPTER_INFO;const pOutBufLen : PULONG) : DWORD; stdcall; 


implementation

function GetAdaptersInfo; external 'iphlpapi.dll';
function GetPerAdapterInfo; external 'iphlpapi.dll';
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  pAdapterList     : PIP_ADAPTER_INFO; 
  dwLenAdapter     : DWORD; 
  aaiAdapters      : array of PIP_ADAPTER_INFO; 
  dwResult         : DWORD; 
  iIndexAdapter    : integer; 
  iasWork          : IP_ADDR_STRING; 
  paiWork          : PIP_PER_ADAPTER_INFO; 
  dwLenAdapterInfo : DWORD; 


begin 
  pAdapterList := nil; // Alles auf 0 ==> Benötigte Buffergrösse ermitteln 
  dwLenAdapter := 0; 
  if GetAdaptersInfo(pAdapterList,@dwLenAdapter) <> ERROR_BUFFER_OVERFLOW then exit; 
  pAdapterList := AllocMem(dwLenAdapter); 
  try 
    if GetAdaptersInfo(pAdapterList,@dwLenAdapter) <> ERROR_SUCCESS then exit;
    SetLength(aaiAdapters,1); 
    aaiAdapters[0] := pAdapterList; 
    while aaiAdapters[High(aaiAdapters)].Next <> nil do begin
      SetLength(aaiAdapters,Length(aaiAdapters)+1);
      aaiAdapters[High(aaiAdapters)] := aaiAdapters[High(aaiAdapters)-1].Next; 
    end; 
    for iIndexAdapter := 0 to high(aaiAdapters) do begin 
      ListBox1.Items.Add(trim(aaiAdapters[iIndexAdapter].Description));
      paiWork  := nil; 
      dwLenAdapterInfo   := 0; 
      dwResult := GetPerAdapterInfo(aaiAdapters[iIndexAdapter].Index,paiWork,@dwLenAdapterInfo); 
      if dwResult <> ERROR_BUFFER_OVERFLOW then begin 
        ListBox1.Items.Add('***** (1) Fehler beim Auslesen der Adapterdaten: '+IntToStr(dwResult)); 
      end else begin
        paiWork  := AllocMem(dwLenAdapterInfo); 
        try 
          dwResult := GetPerAdapterInfo(aaiAdapters[iIndexAdapter].Index,paiWork,@dwLenAdapterInfo); 
          if dwResult <> ERROR_SUCCESS then begin 
            ListBox1.Items.Add('***** (2) Fehler beim Auslesen der Adapterdaten: '+IntToStr(dwResult));
          end else begin
            iasWork := paiWork.DnsServerList; 
            while iasWork.Next <> nil do begin 
              ListBox1.Items.Add('DNS: '+ trim(iasWork.IpAddress.acString));

              iasWork := iasWork.Next^; 
            end;
              ListBox1.Items.Add('DNS: '+ trim(iasWork.IpAddress.acString));
          end;
        finally 
          FreeMem(paiWork,dwLenAdapterInfo); 
        end; 
      end; 
    end; 
  finally 
    FreeMem(pAdapterList,dwLenAdapter); 
  end;
end;

Dieser Code gibt alle Adapter inkl. DNS aus. Nun brauche ich aber noch die aktuelle IP. Da CurrentIpAddress aber vom Typ PIP_ADDR_STRING ist, weiß ich nicht wie ich diesen Wert ausgebe (was bedeutet das Dach..?).. trim funktioniert hier nicht..

Kann mir jemand helfen?

Vielen Dank + Grüße
Passi

[pacman1986]

es handelt sich dabei um einen pointer bzw. einen zeiger

dsdt.info