X-Git-Url: http://www.lcore.org/git/lcore.git/blobdiff_plain/4782a5c5afee47721cc617daa40dd29828342c2b..31d4361fb52761b6486f55af10268a51ee536a6f:/lsocket.pas?ds=inline

diff --git a/lsocket.pas b/lsocket.pas
index 58f157d..642ec9a 100755
--- a/lsocket.pas
+++ b/lsocket.pas
@@ -36,6 +36,9 @@ unit lsocket;
 {$ifdef fpc}
   {$mode delphi}
 {$endif}
+
+{$include lcoreconfig.inc}
+
 interface
   uses
     sysutils,
@@ -51,6 +54,13 @@ interface
       sockets,
     {$endif}
     classes,{pgdebugout,}pgtypes,lcore,fd_utils,binipstuff,dnssync;
+
+{$ifdef ipv6}
+const
+  v4listendefault:boolean=false;
+{$endif}
+
+
 type
   sunB = packed record
     s_b1, s_b2, s_b3, s_b4: byte;
@@ -66,34 +76,6 @@ type
       1: (S_un_w: SunW);
       2: (S_addr: cardinal);
   end;
-  {$ifdef ipv6}
-    {$ifdef ver1_0}
-      cuint16=word;
-      cuint32=dword;
-      sa_family_t=word;
-
-
-      TInetSockAddr6 = packed Record
-        sin6_family   : sa_family_t;
-        sin6_port     : cuint16;
-        sin6_flowinfo : cuint32;
-        sin6_addr     : Tin6_addr;
-        sin6_scope_id : cuint32;
-      end;
-    {$endif}
-  {$endif}
-  TinetSockAddrv = packed record
-    case integer of
-      0: (InAddr:TInetSockAddr);
-      {$ifdef ipv6}
-      1: (InAddr6:TInetSockAddr6);
-      {$endif}
-  end;
-  Pinetsockaddrv = ^Tinetsockaddrv;
-
-
-  type
-    tsockaddrin=TInetSockAddr;
 
   type
     TLsocket = class(tlasio)
@@ -101,57 +83,79 @@ type
       //a: string;
 
       inAddr             : TInetSockAddrV;
+
+      biniplist:tbiniplist;
+      trymoreips:boolean;
+      currentip:integer;
+      connecttimeout:tltimer;
+
 {      inAddrSize:integer;}
 
       //host               : THostentry      ;
 
       //mainthread         : boolean         ; //for debuggin only
-      addr:string;
-      port:string;
-      localaddr:string;
-      localport:string;
-      proto:string;
-      udp:boolean;
+      addr:thostname;
+      port:ansistring;
+      localaddr:thostname;
+      localport:ansistring;
+      proto:ansistring;
+      udp,dgram:boolean;
       listenqueue:integer;
+
+      onconnecttryip:procedure(sender:tobject; const ip:tbinip) of object;
+
+      {$ifdef secondlistener}
+      secondlistener:tlsocket;
+      lastsessionfromsecond:boolean;
+      procedure secondaccepthandler(sender:tobject;error:word);
+      procedure internalclose(error:word);override;
+      {$endif}
       function getaddrsize:integer;
       procedure connect; virtual;
+      procedure realconnect;
       procedure bindsocket;
       procedure listen;
       function accept : longint;
-      function sendto(dest:TInetSockAddr;destlen:integer;data:pointer;len:integer):integer; virtual;
-      function receivefrom(data:pointer;len:integer;var src:TInetSockAddr;var srclen:integer):integer; virtual;
-      //procedure internalclose(error:word);override;
+      function sendto(dest:TInetSockAddrV;destlen:integer;data:pointer;len:integer):integer; virtual;
+      function receivefrom(data:pointer;len:integer;var src:TInetSockAddrV;var srclen:integer):integer; virtual;
+
       procedure handlefdtrigger(readtrigger,writetrigger:boolean); override;
       function send(data:pointer;len:integer):integer;override;
-      procedure sendstr(const str : string);override;
+      procedure sendstr(const str : tbufferstring);override;
       function Receive(Buf:Pointer;BufSize:integer):integer; override;
       function getpeername(var addr:tsockaddrin;addrlen:integer):integer; virtual;
       procedure getXaddrbin(var binip:tbinip); virtual;
       procedure getpeeraddrbin(var binip:tbinip); virtual;
-      function getXaddr:string; virtual;
-      function getpeeraddr:string; virtual;
-      function getXport:string; virtual;
-      function getpeerport:string; virtual;
+      function getXaddr:thostname; virtual;
+      function getpeeraddr:thostname; virtual;
+      function getXport:ansistring; virtual;
+      function getpeerport:ansistring; virtual;
       constructor Create(AOwner: TComponent); override;
+
+      //this one has to be kept public for now because lcorewsaasyncselect calls it
+      procedure connectionfailedhandler(error:word);
+
+      {public in tlasio, and can't be private in both places, so should be public here. 
+      fixes delphi warning --beware}
       {$ifdef win32}
         procedure myfdclose(fd : integer); override;
         function myfdwrite(fd: LongInt;const buf;size: LongInt):LongInt; override;
         function myfdread(fd: LongInt;var buf;size: LongInt):LongInt; override;
       {$endif}
+
+    private
+      {$ifdef ipv6}
+        isv6socket : boolean; //identifies if the socket is v6, set by bindsocket
+      {$endif}
+      procedure taskcallconnectionfailedhandler(wparam,lparam : longint);
+
+      procedure connecttimeouthandler(sender:tobject);
+      procedure connectsuccesshandler;
     end;
     tsocket=longint; // for compatibility with twsocket
 
   twsocket=tlsocket; {easy}
 
-function htons(w:word):word;
-function htonl(i:integer):integer;
-{!!!function longipdns(s:string):longint;}
-
-{$ifdef ipv6}
-const
-  v4listendefault:boolean=false;
-{$endif}
-
 
 const
   TCP_NODELAY=1;
@@ -160,169 +164,106 @@ const
 implementation
 {$include unixstuff.inc}
 
-function longip(s:string):longint;{$ifdef fpc}inline;{$endif}
-var
-  l:longint;
-  a,b:integer;
 
-function convertbyte(const s:string):integer;{$ifdef fpc}inline;{$endif}
+function tlsocket.getaddrsize:integer;
 begin
-  result := strtointdef(s,-1);
-  if result < 0 then exit;
-  if result > 255 then exit;
+  result := inaddrsize(inaddr);
+end;
 
-  {01 exception}
-  if (result <> 0) and (s[1] = '0') then begin
-    result := -1;
-    exit;
+//I used to use the system versions of these from within lsocket (which has
+//functions whose name clashes with them) by using sockets.* and but I can't do
+//that anymore since in some cases connect is now provided by unixstuff.inc
+//hence these wrapper functions --plugwash
+{$ifndef win32}
+  function system_Connect(Sock: LongInt;const Addr;Addrlen: LongInt):Boolean;
+  begin
+    result := connect(sock,addr,addrlen);
   end;
-
-  {+1 exception}
-  if not (s[1] in ['0'..'9']) then begin
-    result := -1;
-    exit
+  function system_SendTo(Sock: LongInt; const Buf;BufLen: LongInt;Flags: LongInt;var Addr;AddrLen: LongInt):LongInt;
+  begin
+    result := sendto(sock,buf,buflen,flags,addr,addrlen);
   end;
-end;
-
-begin
-  result := 0;
-  a := pos('.',s);
-  if a = 0 then exit;
-  b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
-  l := b shl 24;
-  s := copy(s,a+1,256);
-  a := pos('.',s);
-  if a = 0 then exit;
-  b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
-  l := l or b shl 16;
-  s := copy(s,a+1,256);
-  a := pos('.',s);
-  if a = 0 then exit;
-  b := convertbyte(copy(s,1,a-1));if (b < 0) then exit;
-  l := l or b shl 8;
-  s := copy(s,a+1,256);
-  b := convertbyte(copy(s,1,256));if (b < 0) then exit;
-  l := l or b;
-  result := l;
-end;
+  function system_getpeername(Sock: LongInt;var Addr;var Addrlen: LongInt):LongInt;
+  begin
+    result := getpeername(sock,addr,addrlen);
+  end;
+  function system_listen(Sock: LongInt; MaxConnect: LongInt):Boolean;
+  begin
+    result := listen(sock,maxconnect);
+  end;
+  function system_Accept(Sock: LongInt;var Addr;var Addrlen: LongInt):LongInt;
+  begin
+    result := accept(sock,addr,addrlen);
+  end;
+{$endif}
 
-(*!!!
-function longipdns(s:string):longint;
+procedure tlsocket.realconnect;
 var
-  host : thostentry;
+  a,b:integer;
+  iptemp:tbinip;
 begin
-  if s = '0.0.0.0' then begin
-    result := 0;
+  iptemp := biniplist_get(biniplist,currentip);
+  //writeln('trying to connect to ',ipbintostr(biniplist_get(biniplist,currentip)),'#',port);
+  if assigned(onconnecttryip) then onconnecttryip(self,iptemp);
+  makeinaddrv(iptemp,port,inaddr);
+  inc(currentip);
+  if (currentip >= biniplist_getcount(biniplist)) then trymoreips := false;
+
+  udp := false;
+  if (uppercase(proto) = 'UDP') then begin
+    b := IPPROTO_UDP;
+    a := SOCK_DGRAM;
+    udp := true;
+    dgram := true;
+  end else if (uppercase(proto) = 'TCP') or (uppercase(proto) = '') then begin
+    b := IPPROTO_TCP;
+    a := SOCK_STREAM;
+    dgram := false;
+  end else if (uppercase(proto) = 'ICMP') or (strtointdef(proto,256) < 256) then begin
+    b := strtointdef(proto,IPPROTO_ICMP);
+    a := SOCK_RAW;
+    dgram := true;
   end else begin
-    result := longip(s);
-    if result = 0 then begin
-      if gethostbyname(s,host) then begin;
-        result := htonl(Longint(Host.Addr));
-      end;
-      //writeln(inttohex(longint(host.addr),8))
-    end;
-    if result = 0 then begin
-      if resolvehostbyname(s,host) then begin;
-        result := htonl(Longint(Host.Addr));
-      end;
-      //writeln(inttohex(longint(host.addr),8))
-    end;
+    raise ESocketException.create('unrecognised protocol');
   end;
-end;
-*)
-
-
-function htons(w:word):word;
-begin
-  {$ifndef ENDIAN_BIG}
-  result := ((w and $ff00) shr 8) or ((w and $ff) shl 8);
-  {$else}
-  result := w;
-  {$endif}
-end;
-
-function htonl(i:integer):integer;
-begin
-  {$ifndef ENDIAN_BIG}
-  result := (i shr 24) or (i shr 8 and $ff00) or (i shl 8 and $ff0000) or (i shl 24 and $ff000000);
-  {$else}
-  result := i;
-  {$endif}
-end;
-
-function tlsocket.getaddrsize:integer;
-begin
-  {$ifdef ipv6}
-  if inaddr.inaddr.family = AF_INET6 then result := sizeof(tinetsockaddr6) else
-  {$endif}
-  result := sizeof(tinetsockaddr);
-end;
-
-function makeinaddrv(addr,port:string;var inaddr:tinetsockaddrv):integer;
-var
-  biniptemp:tbinip;
-begin
-  result := 0;
-  biniptemp := forwardlookup(addr,10);
-  fillchar(inaddr,sizeof(inaddr),0);
-  //writeln('converted address '+addr+' to binip '+ipbintostr(biniptemp));
-  if biniptemp.family = AF_INET then begin
-    inAddr.InAddr.family:=AF_INET;
-    inAddr.InAddr.port:=htons(strtointdef(port,0));
-    inAddr.InAddr.addr:=biniptemp.ip;
-    result := sizeof(tinetsockaddr);
-  end else
-  {$ifdef ipv6}
-  if biniptemp.family = AF_INET6 then begin
-    inAddr.InAddr6.sin6_family:=AF_INET6;
-    inAddr.InAddr6.sin6_port:=htons(strtointdef(port,0));
-    inAddr.InAddr6.sin6_addr:=biniptemp.ip6;
-    result := sizeof(tinetsockaddr6);
-  end else
-  {$endif}
-  raise esocketexception.create('unable to resolve address: '+addr);
-end;
-
-procedure tlsocket.connect;
-var
-  a:integer;
-begin
-  if state <> wsclosed then close;
-  //prevtime := 0;
-  makeinaddrv(addr,port,inaddr);
-
-  udp := uppercase(proto) = 'UDP';
-  if udp then a := SOCK_DGRAM else a := SOCK_STREAM;
-  a := Socket(inaddr.inaddr.family,a,0);
 
+  a := Socket(inaddr.inaddr.family,a,b);
   //writeln(ord(inaddr.inaddr.family));
   if a = -1 then begin
-    lasterror := {$ifdef win32}getlasterror{$else}socketerror{$endif};
-    raise esocketexception.create('unable to create socket');
+    //unable to create socket, fire an error event (better to use an error event
+    //to avoid poor interaction with multilistener stuff.
+    //a socket value of -2 is a special value to say there is no socket but
+    //we want internalclose to act as if there was
+    fdhandlein := -2;
+    fdhandleout := -2;
+    tltask.create(taskcallconnectionfailedhandler,self,{$ifdef win32}wsagetlasterror{$else}socketerror{$endif},0);
+    exit;
   end;
   try
     dup(a);
     bindsocket;
-    if udp then begin
+    if dgram then begin
       {$ifndef win32}
         SetSocketOptions(fdhandleout, SOL_SOCKET, SO_BROADCAST, 'TRUE', Length('TRUE'));
+      {$else}
+        SetSockOpt(fdhandleout, SOL_SOCKET, SO_BROADCAST, 'TRUE', Length('TRUE'));
       {$endif}
       state := wsconnected;
       if assigned(onsessionconnected) then onsessionconnected(self,0);
+
+      eventcore.rmasterset(fdhandlein,false);
+      eventcore.wmasterclr(fdhandleout);
     end else begin
       state :=wsconnecting;
       {$ifdef win32}
         //writeln(inaddr.inaddr.port);
         winsock.Connect(fdhandlein,winsock.psockaddr(@inADDR)^,getaddrsize);
       {$else}
-        sockets.Connect(fdhandlein,inADDR,getaddrsize);
+        system_Connect(fdhandlein,inADDR,getaddrsize);
       {$endif}
-    end;
-    eventcore.rmasterset(fdhandlein,false);
-    if udp then begin
-      eventcore.wmasterclr(fdhandleout);
-    end else begin
+      eventcore.rmasterset(fdhandlein,false);
       eventcore.wmasterset(fdhandleout);
+      if trymoreips then connecttimeout.enabled := true;
     end;
     //sendq := '';
   except
@@ -331,11 +272,43 @@ begin
       raise; //reraise the exception
     end;
   end;
+
 end;
 
-procedure tlsocket.sendstr(const str : string);
+procedure tlsocket.connecttimeouthandler(sender:tobject);
 begin
-  if udp then begin
+  connecttimeout.enabled := false;
+  destroying := true; //hack to not cause handler to trigger
+  internalclose(0);
+  destroying := false;
+  realconnect;
+end;
+
+
+
+
+procedure tlsocket.connect;
+begin
+  if state <> wsclosed then close;
+  //prevtime := 0;
+  if isbiniplist(addr) then biniplist := addr else biniplist := forwardlookuplist(addr,0);
+  if biniplist_getcount(biniplist) = 0 then raise exception.create('unable to resolve '+addr);
+
+  //makeinaddrv(addr,port,inaddr);
+
+  currentip := 0;
+  if not assigned(connecttimeout) then begin
+    connecttimeout := tltimer.create(self);
+    connecttimeout.ontimer := connecttimeouthandler;
+    connecttimeout.interval := 5000;
+    connecttimeout.enabled := false;
+  end;
+  realconnect;
+end;
+
+procedure tlsocket.sendstr(const str : tbufferstring);
+begin
+  if dgram then begin
     send(@str[1],length(str))
   end else begin
     inherited sendstr(str);
@@ -344,12 +317,12 @@ end;
 
 function tlsocket.send(data:pointer;len:integer):integer;
 begin
-  if udp then begin
-    //writeln('sending to '+inttohex(inaddr.inaddr.addr,8));
-    result := sendto(inaddr.inaddr,getaddrsize,data,len)
-;
-    //writeln('send result',result);
-    //writeln('errno',errno);
+  if dgram then begin
+//    writeln('sending to '+ipbintostr(inaddrvtobinip(inaddr)),' ',htons(inaddr.inaddr.port),' ',len,' bytes');
+    result := sendto(inaddr,getaddrsize,data,len);
+
+//    writeln('send result ',result);
+//    writeln('errno',errno);
   end else begin
     result := inherited send(data,len);
   end;
@@ -358,8 +331,14 @@ end;
 
 function tlsocket.receive(Buf:Pointer;BufSize:integer):integer;
 begin
-  if udp then begin
-    result := myfdread(self.fdhandlein,buf^,bufsize);
+  if dgram then begin
+    {$ifdef secondlistener}
+    if lastsessionfromsecond then begin
+      result := secondlistener.receive(buf,bufsize);
+      lastsessionfromsecond := false;
+    end else
+    {$endif}
+      result := myfdread(self.fdhandlein,buf^,bufsize);
   end else begin
     result := inherited receive(buf,bufsize);
   end;
@@ -367,7 +346,6 @@ end;
 
 procedure tlsocket.bindsocket;
 var
-  a:integer;
   inAddrtemp:TInetSockAddrV;
   inAddrtempx:{$ifdef win32}winsock.TSockaddr{$else}TInetSockAddrV{$endif} absolute inaddrtemp;
   inaddrtempsize:integer;
@@ -381,13 +359,14 @@ begin
         localaddr := '0.0.0.0';
       end;
       //gethostbyname(localaddr,host);
-
-      inaddrtempsize := makeinaddrv(localaddr,localport,inaddrtemp);
-
+      inaddrtempsize := makeinaddrv(forwardlookup(localaddr,0),localport,inaddrtemp);
+      {$ifdef ipv6}
+        isv6socket := (inaddrtemp.inaddr.family = AF_INET6);
+      {$endif}
       If Bind(fdhandlein,inaddrtempx,inaddrtempsize)<> {$ifdef win32}0{$else}true{$endif} Then begin
         state := wsclosed;
         lasterror := {$ifdef win32}getlasterror{$else}socketerror{$endif};
-        raise ESocketException.create('unable to bind, error '+inttostr(lasterror));
+        raise ESocketException.create('unable to bind on address '+localaddr+'#'+localport+', error '+inttostr(lasterror));
       end;
       state := wsbound;
     end;
@@ -401,44 +380,73 @@ end;
 
 procedure tlsocket.listen;
 var
-  yes:longint;
+  {$ifndef win32}
+  yes,no:longint;
+  {$endif}
   socktype:integer;
   biniptemp:tbinip;
-  origaddr:string;
+  origaddr:thostname;
 begin
   if state <> wsclosed then close;
   udp := uppercase(proto) = 'UDP';
-  if udp then socktype := SOCK_DGRAM else socktype := SOCK_STREAM;
+  if udp then begin
+    socktype := SOCK_DGRAM;
+    dgram := true;
+  end else socktype := SOCK_STREAM;
   origaddr := addr;
 
   if addr = '' then begin
     {$ifdef ipv6}
+    //writeln('ipv6 is defined');
     if not v4listendefault then begin
+      //writeln('setting addr to ::');
       addr := '::';
     end else
     {$endif}
     addr := '0.0.0.0';
   end;
-  biniptemp := forwardlookup(addr,10);
+  if isbiniplist(addr) then biniptemp := biniplist_get(addr,0) else biniptemp := forwardlookup(addr,10);
   addr := ipbintostr(biniptemp);
+  //writeln('after ipbintostr call addr =',addr);
+  //writeln('biniptemp.family =',biniptemp.family);
+  //writeln('AF_INET6=',AF_INET6);
+  //writeln('PF_INET6=',PF_INET6);
+  //writeln('AF_INET=',AF_INET);
+  //writeln('PF_INET=',PF_INET);
+  
   fdhandlein := socket(biniptemp.family,socktype,0);
   {$ifdef ipv6}
   if (addr = '::') and (origaddr = '') and (fdhandlein < 0) then begin
+    {writeln('failed to create an IPV6 socket with error ',socketerror,'. trying to create an IPV4 one instead');}
     addr := '0.0.0.0';
-    fdhandlein := socket(AF_INET,socktype,0);
+    fdhandlein := socket(PF_INET,socktype,0);
   end;
   {$endif}
-  if fdhandlein = -1 then raise ESocketException.create('unable to create socket');
+
+  if fdhandlein = -1 then raise ESocketException.create('unable to create socket'{$ifdef win32}+' error='+inttostr(wsagetlasterror){$endif});
   dupnowatch(fdhandlein); // sets up maxs and copies handle to fdhandleout among other things
   //eventcore.setfdreverse(fdhandlein,self); //already taken care of by dup
   state := wsclosed; // then set this back as it was an undesired side effect of dup
 
   try
-    yes := $01010101;  {Copied this from existing code. Value is empiric,
-                    but works. (yes=true<>0) }
     {$ifndef win32}
+      yes := $01010101;  {Copied this from existing code. Value is empiric,
+                    but works. (yes=true<>0) }
+      no := 0;
+
       if SetSocketOptions(fdhandlein, SOL_SOCKET, SO_REUSEADDR,yes,sizeof(yes))=-1 then begin
-        raise ESocketException.create('unable to set socket options');
+        raise ESocketException.create('unable to set SO_REUSEADDR socket option');
+      end;
+      //writeln('addr=',addr);
+      //writeln('setting IPV6_V6ONLY option to 0');
+      //allow v4 connections on v6 sockets
+      if biniptemp.family = af_inet6 then begin
+        if SetSocketOptions(fdhandlein, IPPROTO_IPV6,IPV6_V6ONLY,no,sizeof(no))=-1 then begin
+          writeln(IPPROTO_IPV6);
+          writeln(IPV6_V6ONLY);
+          raise ESocketException.create('unable to set IPV6_V6ONLY socket option error='+inttostr(socketerror));
+          
+        end;
       end;
     {$endif}
     localaddr := addr;
@@ -448,14 +456,38 @@ begin
     if not udp then begin
       {!!! allow custom queue length? default 5}
       if listenqueue = 0 then listenqueue := 5;
-      If {$ifdef win32}winsock{$else}sockets{$endif}.Listen(fdhandlein,listenqueue)<>{$ifdef win32}0{$else}true{$endif} Then raise esocketexception.create('unable to listen');
+      If {$ifdef win32}winsock.listen{$else}system_listen{$endif}(fdhandlein,listenqueue)<>{$ifdef win32}0{$else}true{$endif} Then raise
+esocketexception.create('unable to listen');
       state := wsListening;
     end else begin
       {$ifndef win32}
         SetSocketOptions(fdhandleout, SOL_SOCKET, SO_BROADCAST, 'TRUE', Length('TRUE'));
+      {$else}
+        SetSockOpt(fdhandleout, SOL_SOCKET, SO_BROADCAST, 'TRUE', Length('TRUE'));
       {$endif}
       state := wsconnected;
     end;
+
+    {$ifdef secondlistener}
+    //listening on ::. try to listen on 0.0.0.0 as well for platforms which don't already do that
+    if addr = '::' then begin
+      secondlistener := tlsocket.create(nil);
+      secondlistener.proto := proto;
+      secondlistener.addr := '0.0.0.0';
+      secondlistener.port := port;
+      if udp then begin
+        secondlistener.ondataavailable := secondaccepthandler;
+      end else begin
+        secondlistener.onsessionAvailable := secondaccepthandler;
+      end;
+      try
+        secondlistener.listen;
+      except
+        secondlistener.destroy;
+        secondlistener := nil;
+      end;
+    end;
+    {$endif}
   finally
     if state = wsclosed then begin
       if fdhandlein >= 0 then begin
@@ -466,61 +498,172 @@ begin
         fdhandlein := -1;
       end;
     end else begin
-      eventcore.rmasterset(fdhandlein,true);
+      eventcore.rmasterset(fdhandlein,not udp);
     end;
     if fdhandleout >= 0 then eventcore.wmasterclr(fdhandleout);
   end;
-  //writeln('listened on addr '+addr+':'+port+' '+proto+' using socket number ',fdhandlein); 
+  //writeln('listened on addr '+addr+':'+port+' '+proto+' using socket number ',fdhandlein);
+end;
+
+{$ifdef secondlistener}
+procedure tlsocket.internalclose(error:word);
+begin
+  if assigned(secondlistener) then begin
+    secondlistener.destroy;
+    secondlistener := nil;
+  end;
+  inherited internalclose(error);
+end;
+
+procedure tlsocket.secondaccepthandler;
+begin
+  lastsessionfromsecond := true;
+  if udp then begin
+    ondataavailable(self,error);
+  end else begin
+    if assigned(onsessionavailable) then onsessionavailable(self,error);
+  end;
 end;
+{$endif}
 
 function tlsocket.accept : longint;
 var
   FromAddrSize     : LongInt;        // i don't realy know what to do with these at this
   FromAddr         : TInetSockAddrV;  // at this point time will tell :)
+  a:integer;
 begin
+  {$ifdef secondlistener}
+  if (lastsessionfromsecond) then begin
+    lastsessionfromsecond := false;
+    result := secondlistener.accept;
+    exit;
+  end;
+  {$endif}
 
   FromAddrSize := Sizeof(FromAddr);
   {$ifdef win32}
     result := winsock.accept(fdhandlein,@fromaddr,@fromaddrsize);
   {$else}
-    result := sockets.accept(fdhandlein,fromaddr,fromaddrsize);
+    result := system_accept(fdhandlein,fromaddr,fromaddrsize);
   {$endif}
   //now we have accepted one request start monitoring for more again
   eventcore.rmasterset(fdhandlein,true);
 
-  if result = -1 then raise esocketexception.create('error '+inttostr({$ifdef win32}getlasterror{$else}socketerror{$endif})+' while accepting');
+  if result = -1 then begin
+    raise esocketexception.create('error '+inttostr({$ifdef win32}getlasterror{$else}socketerror{$endif})+' while accepting');
+  end;
   if result > absoloutemaxs then begin
     myfdclose(result);
-    result := -1;
-    raise esocketexception.create('file discriptor out of range');
+    a := result;
+{    result := -1;}
+    raise esocketexception.create('file discriptor out of range: '+inttostr(a));
   end;
 end;
 
-function tlsocket.sendto(dest:TInetSockAddr;destlen:integer;data:pointer;len:integer):integer;
+
+function tlsocket.sendto(dest:TInetSockAddrV;destlen:integer;data:pointer;len:integer):integer;
 var
-  destx : {$ifdef win32}winsock.TSockAddr{$else}TInetSockAddr{$endif} absolute dest;
+  {$ifdef ipv6}
+    realdest : tinetsockaddrv;
+    biniptemp : tbinip;
+  {$endif}
+  destx : {$ifdef win32}winsock.pSockAddr{$else}pInetSockAddrV{$endif};
+
 begin
-  result := {$ifdef win32}winsock{$else}sockets{$endif}.sendto(self.fdhandleout,data^,len,0,destx,destlen);
+  {$ifdef secondlistener}
+    if assigned(secondlistener) then if (dest.inaddr.family = AF_INET) then begin
+      result := secondlistener.sendto(dest,destlen,data,len);
+      exit;
+    end;
+  {$endif}
+  {$ifdef ipv6}
+    if isv6socket then begin
+      biniptemp := inaddrvtobinip(dest);
+      converttov6(biniptemp);
+      destlen := makeinaddrv(biniptemp,inttostr(ntohs(dest.InAddr.port)),realdest);
+      destx := {$ifdef win32}winsock.pSockAddr{$else}pInetSockAddrV{$endif}(@realdest)
+    end else begin
+      destx := {$ifdef win32}winsock.pSockAddr{$else}pInetSockAddrV{$endif}(@dest)
+    end;
+  {$else}
+    destx := {$ifdef win32}winsock.pSockAddr{$else}pInetSockAddrV{$endif}(@dest)
+  {$endif}
+
+  result := {$ifdef win32}winsock.sendto{$else}system_sendto{$endif}(self.fdhandleout,data^,len,0,destx^,destlen);
 end;
 
-function tlsocket.receivefrom(data:pointer;len:integer;var src:TInetSockAddr;var srclen:integer):integer;
+
+function tlsocket.receivefrom(data:pointer;len:integer;var src:TInetSockAddrV;var srclen:integer):integer;
 var
-  srcx : {$ifdef win32}winsock.TSockAddr{$else}TInetSockAddr{$endif} absolute src;
+  tempsrc:TInetSockAddrV;
+  tempsrclen:integer;
+  srcx : {$ifdef win32}winsock.TSockAddr{$else}TInetSockAddrV{$endif} absolute tempsrc;
+  biniptemp:tbinip;
 begin
-  result := {$ifdef win32}winsock{$else}sockets{$endif}.recvfrom(self.fdhandlein,data^,len,0,srcx,srclen);
+  {$ifdef secondlistener}
+  if assigned(secondlistener) then if lastsessionfromsecond then begin
+    lastsessionfromsecond := false;
+    result := secondlistener.receivefrom(data,len,src,srclen);
+    exit;
+  end;
+  {$endif}
+  tempsrclen := sizeof(tempsrc);
+  result := recvfrom(self.fdhandlein,data^,len,0,srcx,tempsrclen);
+
+  {$ifdef ipv6}
+  biniptemp := inaddrvtobinip(tempsrc);
+  if needconverttov4(biniptemp) then begin
+    converttov4(biniptemp);
+    tempsrclen := makeinaddrv(biniptemp,inttostr(ntohs(tempsrc.InAddr.port)),tempsrc);
+  end;
+  {$endif}
+
+  move(tempsrc,src,srclen);
+  srclen := tempsrclen;
 end;
 
+procedure tlsocket.taskcallconnectionfailedhandler(wparam,lparam : longint);
+begin
+  connectionfailedhandler(wparam);
+end;
+
+procedure tlsocket.connectionfailedhandler(error:word);
+begin
+   if trymoreips then begin
+//     writeln('failed with error ',error);
+     connecttimeout.enabled := false;
+     destroying := true;
+     state := wsconnected;
+     self.internalclose(0);
+     destroying := false;
+     realconnect;
+   end else begin
+     state := wsconnected;
+     if assigned(onsessionconnected) then onsessionconnected(self,error);
+     self.internalclose(0);
+     recvq.del(maxlongint);
+   end;
+end;
+
+procedure tlsocket.connectsuccesshandler;
+begin
+   trymoreips := false;
+   connecttimeout.enabled := false;
+   if assigned(onsessionconnected) then onsessionconnected(self,0);
+end;
+
+
 procedure tlsocket.handlefdtrigger(readtrigger,writetrigger:boolean);
 var
   tempbuf:array[0..receivebufsize-1] of byte;
 begin
-  //writeln('got a fd trigger, readtrigger=',readtrigger,' writetrigger=',writetrigger);
+//  writeln('got a fd trigger, readtrigger=',readtrigger,' writetrigger=',writetrigger,' state=',integer(state));
   if (state =wslistening) and readtrigger then begin
 {    debugout('listening socket triggered on read');}
     eventcore.rmasterclr(fdhandlein);
     if assigned(onsessionAvailable) then onsessionAvailable(self,0);
   end;
-  if udp and readtrigger then begin
+  if dgram and readtrigger then begin
     if assigned(ondataAvailable) then ondataAvailable(self,0);
     {!!!test}
     exit;
@@ -537,20 +680,17 @@ begin
     // the read event
     if not readtrigger then begin
       state := wsconnected;
-      if assigned(onsessionconnected) then onsessionconnected(self,0);
+      connectsuccesshandler;
     end else begin
       numread := myfdread(fdhandlein,tempbuf,sizeof(tempbuf));
       if numread <> -1 then begin
         state := wsconnected;
-        if assigned(onsessionconnected) then onsessionconnected(self,0);
+        connectsuccesshandler;
         //connectread := true;
         recvq.add(@tempbuf,numread);
       end else begin
-        state := wsconnected;
-        if assigned(onsessionconnected) then onsessionconnected(self,{$ifdef win32}wsagetlasterror{$else}linuxerror{$endif});
-{        debugout('connect fail');}
-        self.internalclose(0);
-        recvq.del(maxlongint);
+        connectionfailedhandler({$ifdef win32}wsagetlasterror{$else}linuxerror{$endif});
+        exit;
       end;
       // if things went well here we are now in the state wsconnected with data sitting in our receive buffer
       // so we drop down into the processing for data availible
@@ -577,14 +717,16 @@ constructor tlsocket.Create(AOwner: TComponent);
 begin
   inherited create(aowner);
   closehandles := true;
+  trymoreips := true;
 end;
 
 
+
 function tlsocket.getpeername(var addr:tsockaddrin;addrlen:integer):integer;
 var
   addrx : {$ifdef win32}winsock.tsockaddr{$else}tsockaddrin{$endif} absolute addr;
 begin
-  result := {$ifdef win32}winsock{$else}sockets{$endif}.getpeername(self.fdhandlein,addrx,addrlen);
+  result := {$ifdef win32}winsock.getpeername{$else}system_getpeername{$endif}(self.fdhandlein,addrx,addrlen);
 end;
 
 procedure tlsocket.getxaddrbin(var binip:tbinip);
@@ -598,17 +740,9 @@ begin
   {$ifdef win32}
     winsock.getsockname(self.fdhandlein,psockaddr(@addr)^,i);
   {$else}
-    sockets.getsocketname(self.fdhandlein,addr,i);
+    getsocketname(self.fdhandlein,addr,i);
   {$endif}
-  binip.family := addr.inaddr.family;
-  {$ifdef ipv6}
-  if addr.inaddr6.sin6_family = AF_INET6 then begin
-    binip.ip6 := addr.inaddr6.sin6_addr;
-  end else
-  {$endif}
-  begin
-    binip.ip := addr.inaddr.addr;
-  end;
+  binip := inaddrvtobinip(addr);
   converttov4(binip);
 end;
 
@@ -622,22 +756,14 @@ begin
   {$ifdef win32}
     winsock.getpeername(self.fdhandlein,psockaddr(@addr)^,i);
   {$else}
-    sockets.getpeername(self.fdhandlein,addr,i);
+    system_getpeername(self.fdhandlein,addr,i);
   {$endif}
 
-  binip.family := addr.inaddr.family;
-  {$ifdef ipv6}
-  if addr.inaddr6.sin6_family = AF_INET6 then begin
-    binip.ip6 := addr.inaddr6.sin6_addr;
-  end else
-  {$endif}
-  begin
-    binip.ip := addr.inaddr.addr;
-  end;
+  binip := inaddrvtobinip(addr);
   converttov4(binip);
 end;
 
-function tlsocket.getXaddr:string;
+function tlsocket.getXaddr:thostname;
 var
   biniptemp:tbinip;
 begin
@@ -646,7 +772,7 @@ begin
   if result = '' then result := 'error';
 end;
 
-function tlsocket.getpeeraddr:string;
+function tlsocket.getpeeraddr:thostname;
 var
   biniptemp:tbinip;
 begin
@@ -655,7 +781,7 @@ begin
   if result = '' then result := 'error';
 end;
 
-function tlsocket.getXport:string;
+function tlsocket.getXport:ansistring;
 var
   addr:tinetsockaddrv;
   i:integer;
@@ -665,13 +791,13 @@ begin
     winsock.getsockname(self.fdhandlein,psockaddrin(@addr)^,i);
 
   {$else}
-    sockets.getsocketname(self.fdhandlein,addr,i);
+    getsocketname(self.fdhandlein,addr,i);
 
   {$endif}
   result := inttostr(htons(addr.InAddr.port));
 end;
 
-function tlsocket.getpeerport:string;
+function tlsocket.getpeerport:ansistring;
 var
   addr:tinetsockaddrv;
   i:integer;
@@ -681,7 +807,7 @@ begin
     winsock.getpeername(self.fdhandlein,psockaddrin(@addr)^,i);
 
   {$else}
-    sockets.getpeername(self.fdhandlein,addr,i);
+    system_getpeername(self.fdhandlein,addr,i);
 
   {$endif}
   result := inttostr(htons(addr.InAddr.port));
@@ -701,6 +827,6 @@ end;
     result := winsock.recv(fd,buf,size,0);
   end;
 {$endif}
-
+
 end.