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|
{$mode objfpc}
{$H+}
unit macuuid;
Interface
uses SysUtils;
Function CreateMacGUID(Out GUID : TGUID) : Integer;
Implementation
uses unixtype, sockets, baseunix, unix;
Const
MAX_ADJUSTMENT = 10;
IPPROTO_IP = 0;
// AF_INET = 2;
// SOCK_DGRAM = 2;
IF_NAMESIZE = 16;
SIOCGIFCONF = $8912;
SIOCGIFHWADDR = $8927;
Type
{$packrecords c}
tifr_ifrn = record
case integer of
0 : (ifrn_name: array [0..IF_NAMESIZE-1] of char);
end;
tifmap = record
mem_start : culong;
mem_end : culong;
base_addr : cushort;
irq : cuchar;
dma : cuchar;
port : cuchar;
end;
PIFrec = ^TIFrec;
TIFrec = record
ifr_ifrn : tifr_ifrn;
case integer of
0 : (ifru_addr : TSockAddr);
1 : (ifru_dstaddr : TSockAddr);
2 : (ifru_broadaddr : TSockAddr);
3 : (ifru_netmask : TSockAddr);
4 : (ifru_hwaddr : TSockAddr);
5 : (ifru_flags : cshort);
6 : (ifru_ivalue : cint);
7 : (ifru_mtu : cint);
8 : (ifru_map : tifmap);
9 : (ifru_slave : Array[0..IF_NAMESIZE-1] of char);
10 : (ifru_newname : Array[0..IF_NAMESIZE-1] of char);
11 : (ifru_data : pointer);
end;
TIFConf = record
ifc_len : cint;
case integer of
0 : (ifcu_buf : pointer);
1 : (ifcu_req : ^tifrec);
end;
tuuid = record
time_low : cardinal;
time_mid : Word;
time_hi_and_version : Word;
clock_seq : Word;
node : Array[0..5] of byte;
end;
Var
MacAddr : Packed Array[1..6] of byte = (0,0,0,0,0,0);
MacAddrTried : Byte = 0 ;
Last : TTimeVal = (tv_sec:0;tv_usec:0);
ClockSeq : Word = 0;
AdjustMent : Integer = 0;
Procedure GetRandomBytes(Var Buf; NBytes : Integer);
Var
I : Integer;
P : PByte;
begin
P:=@Buf;
Randomize;
For I:=0 to NBytes-1 do
P[i]:=Random(256);
end;
Function GetMacAddr : Boolean;
var
i,j,n,Sd : Integer;
buf : Array[0..1023] of byte;
ifc : TIfConf;
ifr : TIFRec;
ifp : PIFRec;
p : PChar;
begin
Result:=MacAddrTried>0;
If Result then
Result:=MacAddrTried>1
else
begin
MacAddrTried:=1;
sd:=fpSocket(AF_INET,SOCK_DGRAM,IPPROTO_IP);
if (sd<0) then
exit;
Try
ifc.ifc_len:=Sizeof(Buf);
ifc.ifcu_buf:=@buf;
if fpioctl(sd, SIOCGIFCONF, @ifc)<0 then
Exit;
n:= ifc.ifc_len;
i:=0;
While (Not Result) and (I<N) do
begin
ifp:=PIFRec(PByte(ifc.ifcu_buf)+i);
move(ifp^.ifr_ifrn.ifrn_name,ifr.ifr_ifrn.ifrn_name,IF_NAMESIZE);
if (fpioctl(sd, SIOCGIFHWADDR, @ifr) >= 0) then
begin
P:=Pchar(@ifr.ifru_hwaddr.sa_data);
Result:=(p[0]<>#0) or (p[1]<>#0) or (p[2]<>#0)
or (p[3]<>#0) or (p[4]<>#0) or (p[5]<>#0);
If Result Then
begin
Move(P^,MacAddr,SizeOf(MacAddr));
MacAddrTried:=2;
// DumpMacAddr;
end;
end;
I:=I+sizeof(tifrec);
end;
Finally
fileClose(sd);
end;
end;
end;
Function GetClock(Var ClockHigh,ClockLow : Cardinal; Var RetClockSeq : Word) : boolean;
Var
TV : TTImeVal;
ClockReg : QWord;
OK : Boolean;
begin
OK:=True;
Repeat
FPGetTimeOfDay(@Tv,Nil);
If (Last.tv_sec=0) and (last.tv_sec=0) then
begin
GetRandomBytes(ClockSeq,SizeOf(ClockSeq));
ClockSeq:=ClockSeq and $1FFF;
last:=TV;
Dec(last.tv_sec);
end;
if (tv.tv_sec<last.tv_sec) or
((tv.tv_sec=last.tv_sec) and (tv.tv_usec<last.tv_usec)) then
begin
ClockSeq:=(ClockSeq+1) and $1FFF;
Adjustment:=0;
Last:=Tv;
end
else if (tv.tv_sec=last.tv_sec) and (tv.tv_usec=last.tv_usec) then
begin
If Adjustment>=MAX_ADJUSTMENT then
OK:=False
else
inc(AdjustMent);
end
else
begin
AdjustMent:=0;
Last:=tv;
end;
Until OK;
ClockReg:=tv.tv_usec*10+adjustment;
Inc(ClockReg,tv.tv_sec*10000000);
Inc(ClockReg,($01B21DD2 shl 32) + $13814000);
ClockHigh :=Hi(ClockReg);
ClockLow :=Lo(ClockReg);
RetClockSeq :=ClockSeq;
Result :=True;
end;
Procedure UUIDPack(Const UU : TUUID; Var GUID : TGUID);
Var
tmp : Cardinal;
P : PByte;
begin
P:=PByte(@GUID);
tmp:=uu.time_low;
P[3]:=tmp and $FF;
tmp:=tmp shr 8;
P[2]:=tmp and $FF;
tmp:=tmp shr 8;
P[1]:=tmp and $FF;
tmp:=tmp shr 8;
P[0]:=tmp and $FF;
tmp:=uu.time_mid;
P[5]:=tmp and $FF;
tmp:=tmp shr 8;
P[4]:=tmp and $FF;
tmp:=uu.time_hi_and_version;
P[7]:=tmp and $FF;
tmp:=tmp shr 8;
P[6]:=tmp and $FF;
tmp:=uu.clock_seq;
P[9]:=tmp and $FF;
tmp:=tmp shr 8;
P[8]:=tmp and $FF;
Move(uu.node,P[10],6);
end;
Procedure DumpMacAddr;
var
I : Integer;
begin
Write('Mac Addr: ');
For i:=1 to 6 do
write(hexstr(MacAddr[i],2),':');
end;
Function CreateMacGUID(Out GUID : TGUID) : Integer;
Var
UU : TUUId;
ClockMid : Cardinal;
begin
Result:=Ord(not GetMacAddr);
If (Result=0) then
begin
// DumpMacAddr;
// Writeln;
GetClock(ClockMid,uu.time_low,uu.clock_seq);
uu.Clock_seq:=uu.Clock_seq or $8000;
uu.time_mid:=lo(clockMid);
uu.time_hi_and_version:=hi(ClockMid) or $1000;
move(MacAddr,uu.node,sizeof(MacAddr));
UUIDPack(UU,GUID);
end;
end;
initialization
OnCreateGUID:=@CreateMacGUID;
end.
|
