X-Git-Url: http://www.lcore.org/git/lcore.git/blobdiff_plain/d53fe26eaac895d1e7a0ba2b2b8965cf77932de8..096e05689a95dc55ef9f554978c5ea3f263bc919:/dnssync.pas?ds=inline
diff --git a/dnssync.pas b/dnssync.pas
old mode 100755
new mode 100644
index b682acf..9a0c2c1
--- a/dnssync.pas
+++ b/dnssync.pas
@@ -25,24 +25,26 @@ interface
sockets,
fd_utils,
{$endif}
- sysutils;
+ lcorernd,
+ sysutils,
+ ltimevalstuff;
//convert a name to an IP
//will return v4 or v6 depending on what seems favorable, or manual preference setting
//on error the binip will have a family of 0 (other fiels are also currently
//zeroed out but may be used for further error information in future)
//timeout is in miliseconds, it is ignored when using windows dns
-function forwardlookup(name:string;timeout:integer):tbinip;
+function forwardlookup(name:ansistring;timeout:integer):tbinip;
//convert a name to a list of all IP's returned
//this returns both v4 and v6 IP's, or possibly only v4 or v6, depending on settings
//on error, returns an empty list
-function forwardlookuplist(name:string;timeout:integer):tbiniplist;
+function forwardlookuplist(name:ansistring;timeout:integer):tbiniplist;
//convert an IP to a name, on error a null string will be returned, other
//details as above
-function reverselookup(ip:tbinip;timeout:integer):string;
+function reverselookup(ip:tbinip;timeout:integer):ansistring;
@@ -54,8 +56,9 @@ const
defaulttimeout=10000;
const mintimeout=16;
+ toport='53';
+
var
- dnssyncserver:string;
id:integer;
sendquerytime:array[0..numsock-1] of integer;
@@ -71,14 +74,14 @@ implementation
{$endif}
{$i unixstuff.inc}
-{$i ltimevalstuff.inc}
+
+{$ifdef syncdnscore}
var
numsockused:integer;
fd:array[0..numsock-1] of integer;
state:array[0..numsock-1] of tdnsstate;
-
-{$ifdef syncdnscore}
+ toaddr:array[0..numsock-1] of tbinip;
{$ifdef win32}
const
@@ -106,19 +109,23 @@ end;
function sendquery(socknum:integer;const packet:tdnspacket;len:integer):boolean;
var
- a:integer;
- addr : string;
- port : string;
+ ip : tbinip;
+ port : ansistring;
inaddr : TInetSockAddrV;
begin
{ writeln('sendquery ',decodename(state.packet,state.packetlen,12,0,a),' ',state.requesttype);}
result := false;
if len = 0 then exit; {no packet}
- if dnssyncserver <> '' then addr := dnssyncserver else addr := getcurrentsystemnameserver(id);
- port := '53';
+ ip := getcurrentsystemnameserverbin(id);
+
+ {$ifdef ipv6}{$ifdef win32}
+ if toaddr[socknum].family = AF_INET6 then if (useaf = 0) then useaf := useaf_preferv6;
+ {$endif}{$endif}
- makeinaddrv(ipstrtobinf(addr),port,inaddr);
+ port := toport;
+ toaddr[socknum] := ip;
+ makeinaddrv(toaddr[socknum],port,inaddr);
sendto(fd[socknum],packet,len,0,inaddr,inaddrsize(inaddr));
sendquerytime[socknum] := getts;
@@ -130,21 +137,24 @@ var
inAddrtemp : TInetSockAddrV;
a:integer;
biniptemp:tbinip;
- addr:string;
+
begin
//init both sockets smultaneously, always, so they get succesive fd's
- if fd[0] > 0 then exit;
- if dnssyncserver <> '' then addr := dnssyncserver else addr := getcurrentsystemnameserver(id);
+ {recreate sockets every time, reusing them will fail (hang) if the nameserver is changed
+ also changing the nameserver can't possibly work}
+ {if fd[0] > 0 then exit;}
+ for a := 0 to numsock-1 do if (fd[a] > 0) then closesocket(fd[a]);
+
+ biniptemp := getcurrentsystemnameserverbin(id);
//must get the DNS server here so we know to init v4 or v6
- fillchar(inaddrtemp,sizeof(inaddrtemp),0);
- ipstrtobin(addr,biniptemp);
- if biniptemp.family = 0 then biniptemp.family := AF_INET;
+ if biniptemp.family = AF_INET6 then biniptemp := ipstrtobinf('::') else biniptemp := ipstrtobinf('0.0.0.0');
- inaddrtemp.inaddr.family := biniptemp.family;
for a := 0 to numsockused-1 do begin
+ makeinaddrv(biniptemp,inttostr( 1024 + randominteger(65536 - 1024) ),inaddrtemp);
+
fd[a] := Socket(biniptemp.family,SOCK_DGRAM,0);
If {$ifndef win32}Not{$endif} Bind(fd[a],inAddrtemp,inaddrsize(inaddrtemp)) Then begin
@@ -168,13 +178,18 @@ var
currenttime : integer;
lag : ttimeval;
- currenttimeout : ttimeval;
selecttimeout : ttimeval;
socknum:integer;
needprocessing:array[0..numsock-1] of boolean;
finished:array[0..numsock-1] of boolean;
a,b:integer;
+ Src : TInetSockAddrV;
+ Srcx : {$ifdef win32}sockaddr_in{$else}TInetSockAddrV{$endif} absolute Src;
+ SrcLen : Integer;
+ fromip:tbinip;
+ fromport:ansistring;
+
begin
if timeout < mintimeout then timeout := defaulttimeout;
@@ -242,10 +257,22 @@ begin
fillchar(state[socknum].recvpacket,sizeof(state[socknum].recvpacket),0);
msectotimeval(lag,(currenttime-sendquerytime[socknum]) and tsmask);
- if dnssyncserver = '' then reportlag(id,(lag.tv_sec*1000000)+lag.tv_usec);
- state[socknum].recvpacketlen := recv(fd[socknum],state[socknum].recvpacket, SizeOf(state[socknum].recvpacket),0);
- state[socknum].parsepacket := true;
- needprocessing[socknum] := true;
+ reportlag(id,(lag.tv_sec*1000000)+lag.tv_usec);
+
+ SrcLen := SizeOf(Src);
+ state[socknum].recvpacketlen := recvfrom(fd[socknum],state[socknum].recvpacket, SizeOf(state[socknum].recvpacket),0,Srcx,SrcLen);
+
+ if (state[socknum].recvpacketlen > 0) then begin
+ fromip := inaddrvtobinip(Src);
+ fromport := inttostr(htons(src.InAddr.port));
+ if ((not comparebinip(toaddr[socknum],fromip)) or (fromport <> toport)) then begin
+// writeln('dnssync received from wrong IP:port ',ipbintostr(fromip),'#',fromport);
+ state[socknum].recvpacketlen := 0;
+ end else begin
+ state[socknum].parsepacket := true;
+ needprocessing[socknum] := true;
+ end;
+ end;
end;
end;
if selectresult < 0 then exit;
@@ -253,7 +280,7 @@ begin
currenttime := getts;
- if dnssyncserver = '' then reportlag(id,-1);
+ reportlag(id,-1);
if (currenttime >= endtime) and ((not wrapmode) or (currenttime < starttime)) then begin
exit;
end else begin
@@ -269,10 +296,10 @@ end;
-function forwardlookuplist(name:string;timeout:integer):tbiniplist;
+function forwardlookuplist(name:ansistring;timeout:integer):tbiniplist;
var
dummy : integer;
- a,b:integer;
+ a:integer;
biniptemp:tbinip;
l:tbiniplist;
begin
@@ -307,7 +334,7 @@ begin
{$endif}
begin
{$ifdef syncdnscore}
- {$ifdef linux}{$ifdef ipv6}initpreferredmode;{$endif}{$endif}
+ {$ifdef ipv6}initpreferredmode;{$endif}
numsockused := 0;
@@ -334,13 +361,13 @@ begin
end else begin
biniplist_addlist(result,state[0].resultlist);
biniplist_addlist(result,state[1].resultlist);
- {$endif}
+ {$endif}
end;
{$endif}
end;
end;
-function forwardlookup(name:string;timeout:integer):tbinip;
+function forwardlookup(name:ansistring;timeout:integer):tbinip;
var
listtemp:tbiniplist;
begin
@@ -348,7 +375,7 @@ begin
result := biniplist_get(listtemp,0);
end;
-function reverselookup(ip:tbinip;timeout:integer):string;
+function reverselookup(ip:tbinip;timeout:integer):ansistring;
var
dummy : integer;
begin