[Delphi6] How to get Client local IP ?

要用winsock

把所有ethernet的IP取出來:
[delphi]
uses Winsock;

function getIPs: Tstrings;
type
TaPInAddr = array[0..10] of PInAddr;
PaPInAddr = ^TaPInAddr;
var
phe: PHostEnt;
pptr: PaPInAddr;
Buffer: array[0..63] of Char;
I: Integer;
GInitData: TWSAData;
begin
WSAStartup($101, GInitData);
Result := TstringList.Create;
Result.Clear;
GetHostName(Buffer, SizeOf(Buffer));
phe := GetHostByName(buffer);
if phe = nil then Exit;
pPtr := PaPInAddr(phe^.h_addr_list);
I := 0;
while pPtr^[I] <> nil do
begin
Result.Add(inet_ntoa(pptr^[I]^));
Inc(I);
end;
WSACleanup;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage(GetIps.text);
end;
[/delphi]

4/17 update:
取得單一local IP
[delphi]
function getUserIP: string;
type
TaPInAddr = array [0..10] of PInAddr;
PaPInAddr = ^TaPInAddr;
var
phe: PHostEnt;
pptr: PaPInAddr;
Buffer: array [0..63] of char;
i: Integer;
GInitData: TWSADATA;
begin
WSAStartup($101, GInitData);
Result := ”;
GetHostName(Buffer, SizeOf(Buffer));
phe :=GetHostByName(buffer);
if phe = nil then Exit;
pptr := PaPInAddr(Phe^.h_addr_list);
i := 0;
while pptr^[i] <> nil do
begin
result:=StrPas(inet_ntoa(pptr^[i]^));
Inc(i);
end;
WSACleanup;
end;
[/delphi]
————————————-
[delphi]
function GetIPFromHost
(var HostName, IPaddr, WSAErr: string): Boolean;
type
Name = array[0..100] of Char;
PName = ^Name;
var
HEnt: pHostEnt;
HName: PName;
WSAData: TWSAData;
i: Integer;
begin
Result := False;
if WSAStartup($0101, WSAData) <> 0 then begin
WSAErr := ‘Winsock is not responding."’;
Exit;
end;
IPaddr := ”;
New(HName);
if GetHostName(HName^, SizeOf(Name)) = 0 then
begin
HostName := StrPas(HName^);
HEnt := GetHostByName(HName^);
for i := 0 to HEnt^.h_length – 1 do
IPaddr :=
Concat(IPaddr,
IntToStr(Ord(HEnt^.h_addr_list^[i])) + ‘.’);
SetLength(IPaddr, Length(IPaddr) – 1);
Result := True;
end
else begin
case WSAGetLastError of
WSANOTINITIALISED:WSAErr:=’WSANotInitialised’;
WSAENETDOWN :WSAErr:=’WSAENetDown’;
WSAEINPROGRESS :WSAErr:=’WSAEInProgress’;
end;
end;
Dispose(HName);
WSACleanup;
end;
[/delphi]
[delphi]
procedure TForm1.Button1Click(Sender: TObject);
var
Host, IP, Err: string;
begin
if GetIPFromHost(Host, IP, Err) then begin
Edit1.Text := Host;
Edit2.Text := IP;
end
else
MessageDlg(Err, mtError, [mbOk], 0);
end;
[/delphi]
http://delphi.about.com/od/networking/l/aa103100a.htm