unit NetworkUtils;
interface
uses
Windows, SysUtils, Classes;
function GetLocalIPAddressList(outsl: TStrings): DWORD;
function GetLocalMACAddressList(outSL: TStrings): DWORD;
function GetDHCPIPAddressList(outsl: TStrings): DWORD;
function GetGatewayIPAddressList(outsl: TStrings): DWORD;
function GetMACAddress(const IPAddress: string; var outAddress: string): DWORD;
function FormatMAC(s: string): string;
implementation
uses
iphlp, WinSock;
// TODO: Replace GetAdaptersInfo()? A comment at MSDN states that there might be problems with IPv6
// "GetAdaptersInfo returns ERROR_NO_DATA if there are only IPv6 interfaces
// configured on system. In that case GetAdapterAddresses has to be used!"
function GetLocalIPAddressList(outsl: TStrings): DWORD;
var
pAdapterInfo: PIP_ADAPTER_INFO;
addr: string;
addrStr: IP_ADDR_STRING;
BufLen: Cardinal;
begin
BufLen := SizeOf(IP_ADAPTER_INFO);
GetAdaptersInfo(nil, @BufLen);
pAdapterInfo := AllocMem(BufLen);
try
Result := GetAdaptersInfo(pAdapterInfo, @BufLen);
if not Result = ERROR_SUCCESS then Exit;
while pAdapterInfo <> nil do
begin
addrStr := pAdapterInfo^.IpAddressList;
repeat
addr := addrStr.IpAddress.S;
if (addr <> '') and (outsl.IndexOf(addr) = -1) then
outsl.Add(addr);
if addrStr.Next = nil then break;
AddrStr := addrStr.Next^;
until false;
pAdapterInfo := pAdapterInfo^.next;
end;
finally
Freemem(pAdapterInfo);
end;
end;
function GetDHCPIPAddressList(outsl: TStrings): DWORD;
var
pAdapterInfo: PIP_ADAPTER_INFO;
addr: string;
addrStr: IP_ADDR_STRING;
BufLen: Cardinal;
begin
BufLen := SizeOf(IP_ADAPTER_INFO);
GetAdaptersInfo(nil, @BufLen);
pAdapterInfo := AllocMem(BufLen);
try
Result := GetAdaptersInfo(pAdapterInfo, @BufLen);
if not Result = ERROR_SUCCESS then Exit;
while pAdapterInfo <> nil do
begin
addrStr := pAdapterInfo^.DhcpServer;
repeat
addr := addrStr.IpAddress.S;
if (addr <> '') and (outsl.IndexOf(addr) = -1) then
outsl.Add(addr);
if addrStr.Next = nil then break;
AddrStr := addrStr.Next^;
until false;
pAdapterInfo := pAdapterInfo^.next;
end;
finally
Freemem(pAdapterInfo);
end;
end;
function GetGatewayIPAddressList(outsl: TStrings): DWORD;
var
pAdapterInfo: PIP_ADAPTER_INFO;
addr: string;
addrStr: IP_ADDR_STRING;
BufLen: Cardinal;
begin
BufLen := SizeOf(IP_ADAPTER_INFO);
GetAdaptersInfo(nil, @BufLen);
pAdapterInfo := AllocMem(BufLen);
try
Result := GetAdaptersInfo(pAdapterInfo, @BufLen);
if not Result = ERROR_SUCCESS then Exit;
while pAdapterInfo <> nil do
begin
addrStr := pAdapterInfo^.GatewayList;
repeat
addr := addrStr.IpAddress.S;
if (addr <> '') and (outsl.IndexOf(addr) = -1) then
outsl.Add(addr);
if addrStr.Next = nil then break;
AddrStr := addrStr.Next^;
until false;
pAdapterInfo := pAdapterInfo^.next;
end;
finally
Freemem(pAdapterInfo);
end;
end;
function GetMACAddress(const IPAddress: string; var outAddress: string): DWORD;
// http://stackoverflow.com/questions/4550672/delphi-get-mac-of-router
var
MacAddr : Array[0..5] of Byte;
DestIP : ULONG;
PhyAddrLen : ULONG;
WSAData : TWSAData;
j: integer;
begin
outAddress := '';
WSAStartup($0101, WSAData);
try
ZeroMemory(@MacAddr, SizeOf(MacAddr));
DestIP := inet_addr(PAnsiChar(IPAddress));
PhyAddrLen := SizeOf(MacAddr); // TODO: more ?
Result := SendArp(DestIP, 0, @MacAddr, @PhyAddrLen);
if Result = S_OK then
begin
outAddress := '';
for j := 0 to PhyAddrLen-1 do
begin
outAddress := outAddress + format('%.2x', [MacAddr[j]]);
end;
outAddress := FormatMAC(outAddress);
end;
finally
WSACleanup;
end;
end;
function GetLocalMACAddressList(outSL: TStrings): DWORD;
const
_MAX_ROWS_ = 100;
type
_IfTable = Record
nRows: LongInt;
ifRow: Array[1.._MAX_ROWS_] of MIB_IFROW;
end;
var
pIfTable: ^_IfTable;
TableSize: LongInt;
tmp: String;
i, j: Integer;
begin
pIfTable := nil;
try
// First: just get the buffer size.
// TableSize returns the size needed.
TableSize := 0; // Set to zero so the GetIfTabel function
// won't try to fill the buffer yet,
// but only return the actual size it needs.
GetIfTable(pIfTable, TableSize, 1);
if (TableSize < SizeOf(MIB_IFROW)+SizeOf(LongInt)) then
begin
Result := ERROR_NO_DATA;
Exit; // less than 1 table entry?!
end;
// Second:
// allocate memory for the buffer and retrieve the
// entire table.
GetMem(pIfTable, TableSize);
Result := GetIfTable(pIfTable, TableSize, 1);
if Result <> NO_ERROR then Exit;
// Read the ETHERNET addresses.
for i := 1 to pIfTable^.nRows do
begin
//if pIfTable^.ifRow[i].dwType=MIB_IF_TYPE_ETHERNET then
begin
tmp := '';
for j := 0 to pIfTable^.ifRow[i].dwPhysAddrLen-1 do
begin
tmp := tmp + format('%.2x', [pIfTable^.ifRow[i].bPhysAddr[j]]);
end;
tmp := FormatMAC(tmp);
if (tmp <> '') and (outSL.IndexOf(tmp) = -1) then
outSL.Add(tmp);
end;
end;
finally
if Assigned(pIfTable) then FreeMem(pIfTable, TableSize);
end;
end;
function FormatMAC(s: string): string;
var
m: integer;
begin
result := '';
m := 1;
s := UpperCase(s);
repeat
if m > 1 then result := result + '-';
result := result + Copy(s, m, 2);
inc(m, 2);
until m > Length(s);
end;
end.