Как по IP адресу получить HostName (и обратно)
Falk0ner, вс, 06/07/2008 - 15:34.
function TGenericNetTask.GetPeerOrigin( const ALogin : String ) : DWORD;
const AddressStrMaxLen = 256;
var len : DWORD;
ptr : PChar;
pHE : PHostEnt;
addr : TSockAddr;
buf : Array [0..AddressStrMaxLen-1] of Char;
begin
if FNet=nil then raise ESocketError.Error(-1,ClassName+'.GetPeerAds: Net is
not defined',WSAHOST_NOT_FOUND);
len := SizeOf(TSockAddr);
if getpeername(FSocket,addr,len)<>0 then
RaiseLastSocketError(-1,ClassName+'.GetPeerAds: getpeername()');
case addr.sin_family of
AF_INET: // TCP/IP
begin
pHE := gethostbyaddr( PChar(@addr.sin_addr), SizeOf(TInAddr),
AF_INET );
if pHE=nil then RaiseLastSocketError(-1,ClassName+'.GetPeerAds:
gethostbyaddr()');
FPeerNodeName := pHE^.h_name;
if FNet.NodeByName(FPeerNodeName)=nil then
begin
ptr := StrScan(pHE^.h_name,'.');
if ptr<>nil then FPeerNodeName :=
Copy(pHE^.h_name,1,ptr-pHE^.h_name);
end;
end;
else
len := AddressStrMaxLen;
if WSAAddressToStringA(sin,sinlen,nil,buf,len)<>0 then
RaiseLastSocketError(-1,ClassName+'.GetPeerAds: WSAAddressToStringA()');
ptr := StrRScan(buf,':');
if ptr<>nil then len := ptr-buf;
FPeerNodeName := Copy(buf,1,len);
end;
Result :=
FNet.EncodeAddress(ALogin,FPeerNodeName,'',[bLoginIdRequired,bNodeIdREquired,bR
aiseError]);
end; {TGenericNetTask.GetPeerOrigin}
const AddressStrMaxLen = 256;
var len : DWORD;
ptr : PChar;
pHE : PHostEnt;
addr : TSockAddr;
buf : Array [0..AddressStrMaxLen-1] of Char;
begin
if FNet=nil then raise ESocketError.Error(-1,ClassName+'.GetPeerAds: Net is
not defined',WSAHOST_NOT_FOUND);
len := SizeOf(TSockAddr);
if getpeername(FSocket,addr,len)<>0 then
RaiseLastSocketError(-1,ClassName+'.GetPeerAds: getpeername()');
case addr.sin_family of
AF_INET: // TCP/IP
begin
pHE := gethostbyaddr( PChar(@addr.sin_addr), SizeOf(TInAddr),
AF_INET );
if pHE=nil then RaiseLastSocketError(-1,ClassName+'.GetPeerAds:
gethostbyaddr()');
FPeerNodeName := pHE^.h_name;
if FNet.NodeByName(FPeerNodeName)=nil then
begin
ptr := StrScan(pHE^.h_name,'.');
if ptr<>nil then FPeerNodeName :=
Copy(pHE^.h_name,1,ptr-pHE^.h_name);
end;
end;
else
len := AddressStrMaxLen;
if WSAAddressToStringA(sin,sinlen,nil,buf,len)<>0 then
RaiseLastSocketError(-1,ClassName+'.GetPeerAds: WSAAddressToStringA()');
ptr := StrRScan(buf,':');
if ptr<>nil then len := ptr-buf;
FPeerNodeName := Copy(buf,1,len);
end;
Result :=
FNet.EncodeAddress(ALogin,FPeerNodeName,'',[bLoginIdRequired,bNodeIdREquired,bR
aiseError]);
end; {TGenericNetTask.GetPeerOrigin}
Alex Konshin
mailto:alexk@msmt.spb.su"
(2:5030/217)
Автор: StayAtHome
Взято с Vingrad.ru http://forum.vingrad.ru
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