hosts file support in the built in dns resolver

[lcore.git] / binipstuff.pas

diff --git a/binipstuff.pas b/binipstuff.pas
old mode 100755 (executable)
new mode 100644 (file)
index 0c23533..1d7a7c2
--- a/binipstuff.pas
+++ b/binipstuff.pas
@@ -4,37 +4,42 @@
   ----------------------------------------------------------------------------- }\r
 unit binipstuff;\r
 \r
   ----------------------------------------------------------------------------- }\r
 unit binipstuff;\r
 \r

+{$ifdef fpc}\r
+{$mode delphi}\r
+{$endif}\r
+\r

 interface\r
 \r
 {$include lcoreconfig.inc}\r
 \r
 interface\r
 \r
 {$include lcoreconfig.inc}\r
 \r

-{$ifndef win32}\r
-{$ifdef ipv6}\r
-uses sockets;\r
-{$endif}\r
+uses\r
+{$ifndef mswindows}\r
+  sockets,\r

 {$endif}\r
 {$endif}\r

+  pgtypes;\r

 \r
 \r

-{$ifdef fpc}\r
-  {$mode delphi}\r
-{$endif}\r
-{$ifdef cpu386}{$define i386}{$endif}\r
-{$ifdef i386}{$define ENDIAN_LITTLE}{$endif}\r
+\r
+{$include pgtypes.inc}\r

 \r
 {$include uint32.inc}\r
 \r
 const\r
 \r
 {$include uint32.inc}\r
 \r
 const\r

-  hexchars:array[0..15] of char='0123456789abcdef';\r
-  AF_INET=2;\r
-  {$ifdef win32}\r
+  hexchars:array[0..15] of ansichar='0123456789abcdef';\r
+  {$ifdef mswindows}\r
+    AF_INET=2;\r

     AF_INET6=23;\r
   {$else}\r
     AF_INET6=23;\r
   {$else}\r

-    AF_INET6=10;\r
+    //redeclare these constants so units that use us can use them\r
+    //without using sockets directly\r
+    AF_INET=AF_INET;\r
+    AF_INET6=AF_INET6;\r
+    //AF_INET6=10;\r

   {$endif}\r
 \r
 type\r
   {$ifdef ipv6}\r
     \r
   {$endif}\r
 \r
 type\r
   {$ifdef ipv6}\r
     \r

-    {$ifdef win32}\r
+    {$ifdef mswindows}\r

       {$define want_Tin6_addr}\r
     {$endif}\r
     {$ifdef ver1_0}\r
       {$define want_Tin6_addr}\r
     {$endif}\r
     {$ifdef ver1_0}\r


@@ -65,55 +70,59 @@ type
     {$endif}\r
   end;\r
 \r
     {$endif}\r
   end;\r
 \r

-  {$ifdef win32}\r
-    TInetSockAddr = packed Record\r
-      family:Word;\r
-      port  :Word;\r
-      addr  :uint32;\r
-      pad   :array [1..8] of byte;\r
-    end;\r
-    {$ifdef ipv6}\r
+  {zipplet 20170204: FPC 3.0.0 changed the definition of TInetSockAddr:\r
+    - http://www.freepascal.org/docs-html/rtl/sockets/tinetsockaddr.html\r
+    - http://www.freepascal.org/docs-html/rtl/sockets/sockaddr_in.html\r
+   Due to this, TInetSockAddr -> TLInetSockAddr4 / TLInetSockAddr6\r
+   Using our own types no matter what OS or compiler version will prevent future problems.\r
+   Adding "4" to non IPv6 record names improves code clarity }\r

 \r
 \r

-      TInetSockAddr6 = packed record\r
-        sin6_family: word;\r
-        sin6_port: word;\r
-        sin6_flowinfo: uint32;\r
-        sin6_addr: tin6_addr;\r
-        sin6_scope_id: uint32;\r
-      end;\r
+  {$ifndef mswindows}\r
+    //zipplet 20170204: Do we still need to support ver1_0? Perhaps a cleanup is in order.\r
+    //For now keep supporting it for compatibility.\r
+    {$ifdef ver1_0}\r
+      cuint16 = word;\r
+      cuint32 = dword;\r
+      sa_family_t = word;\r

     {$endif}\r
   {$endif}\r
 \r
     {$endif}\r
   {$endif}\r
 \r

-\r
-\r
-    {$ifdef ipv6}\r
-    {$ifdef ver1_0}\r
-      cuint16=word;\r
-      cuint32=dword;\r
-      sa_family_t=word;\r
-\r
-    {$endif}\r
+  TLInetSockAddr4 = packed Record\r
+    family:Word;\r
+    port  :Word;\r
+    addr  :uint32;\r
+    pad   :array [0..7] of byte;   //zipplet 20170204 - originally this was 1..8 for some reason\r
+  end;\r
+  \r
+  {$ifdef ipv6}\r
+    TLInetSockAddr6 = packed record\r
+      sin6_family: word;\r
+      sin6_port: word;\r
+      sin6_flowinfo: uint32;\r
+      sin6_addr: tin6_addr;\r
+      sin6_scope_id: uint32;\r
+    end;\r

   {$endif}\r
   {$endif}\r

+\r
+  //zipplet 20170204: I did not rename the unioned record. We might want to rename this to TLinetSockAddrv\r

   TinetSockAddrv = packed record\r
     case integer of\r
   TinetSockAddrv = packed record\r
     case integer of\r

-      0: (InAddr:TInetSockAddr);\r
+      0: (InAddr:TLInetSockAddr4);\r

       {$ifdef ipv6}\r
       {$ifdef ipv6}\r

-      1: (InAddr6:TInetSockAddr6);\r
+      1: (InAddr6:TLInetSockAddr6);\r

       {$endif}\r
   end;\r
   Pinetsockaddrv = ^Tinetsockaddrv;\r
 \r
   type\r
       {$endif}\r
   end;\r
   Pinetsockaddrv = ^Tinetsockaddrv;\r
 \r
   type\r

-    tsockaddrin=TInetSockAddr;\r
-\r
-\r
+    tsockaddrin=TLInetSockAddr4;\r

 \r
 {\r
 bin IP list code, by beware\r
 while this is really just a string, on the interface side it must be treated\r
 as an opaque var which is passed as "var" when it needs to be modified}\r
 \r
 \r
 {\r
 bin IP list code, by beware\r
 while this is really just a string, on the interface side it must be treated\r
 as an opaque var which is passed as "var" when it needs to be modified}\r
 \r

-  tbiniplist=string;\r
+  tbiniplist=tbufferstring;\r

 \r
 function biniplist_new:tbiniplist;\r
 procedure biniplist_add(var l:tbiniplist;ip:tbinip);\r
 \r
 function biniplist_new:tbiniplist;\r
 procedure biniplist_add(var l:tbiniplist;ip:tbinip);\r


@@ -123,32 +132,41 @@ procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);
 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);\r
 procedure biniplist_free(var l:tbiniplist);\r
 procedure biniplist_addlist(var l:tbiniplist;const l2:tbiniplist);\r
 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);\r
 procedure biniplist_free(var l:tbiniplist);\r
 procedure biniplist_addlist(var l:tbiniplist;const l2:tbiniplist);\r

-function biniplist_tostr(const l:tbiniplist):string;\r
+function biniplist_tostr(const l:tbiniplist):thostname;\r
+function isbiniplist(const l:tbiniplist):boolean;\r

 \r
 function htons(w:word):word;\r
 function htonl(i:uint32):uint32;\r
 \r
 \r
 function htons(w:word):word;\r
 function htonl(i:uint32):uint32;\r
 \r

-function ipstrtobin(const s:string;var binip:tbinip):boolean;\r
-function ipstrtobinf(const s:string):tbinip;\r
-function ipbintostr(const binip:tbinip):string;\r
+function ipstrtobin(const s:thostname;var binip:tbinip):boolean;\r
+function ipstrtobinf(const s:thostname):tbinip;\r
+function ipbintostr(const binip:tbinip):thostname;\r

 {$ifdef ipv6}\r
 {$ifdef ipv6}\r

-function ip6bintostr(const bin:tin6_addr):string;\r
-function ip6strtobin(const s:string;var bin:tin6_addr):boolean;\r
+function ip6bintostr(const bin:tin6_addr):thostname;\r
+function ip6strtobin(const s:thostname;var bin:tin6_addr):boolean;\r

 {$endif}\r
 \r
 function comparebinip(const ip1,ip2:tbinip):boolean;\r
 procedure maskbits(var binip:tbinip;bits:integer);\r
 function comparebinipmask(ip1,ip2:tbinip;bits:integer):boolean;\r
 \r
 {$endif}\r
 \r
 function comparebinip(const ip1,ip2:tbinip):boolean;\r
 procedure maskbits(var binip:tbinip;bits:integer);\r
 function comparebinipmask(ip1,ip2:tbinip;bits:integer):boolean;\r
 \r

+procedure addipsoffamily(var l:tbiniplist;const l2:tbiniplist;family:integer);\r
+\r

 {deprecated}\r
 {deprecated}\r

-function longip(s:string):longint;\r
+function longip(s:thostname):longint;\r

 \r
 \r

+function needconverttov4(const ip:tbinip):boolean;\r

 procedure converttov4(var ip:tbinip);\r
 procedure converttov4(var ip:tbinip);\r

+procedure converttov6(var ip:tbinip);\r

 \r
 function inaddrvtobinip(inaddrv:tinetsockaddrv):tbinip;\r
 \r
 function inaddrvtobinip(inaddrv:tinetsockaddrv):tbinip;\r

-function makeinaddrv(addr:tbinip;port:string;var inaddr:tinetsockaddrv):integer;\r
+function makeinaddrv(addr:tbinip;port:ansistring;var inaddr:tinetsockaddrv):integer;\r

 function inaddrsize(inaddr:tinetsockaddrv):integer;\r
 \r
 function inaddrsize(inaddr:tinetsockaddrv):integer;\r
 \r

+function getbinipbitlength(const ip:tbinip):integer;\r
+function getipstrbitlength(const ip:thostname):integer;\r
+function getfamilybitlength(family:integer):integer;\r
+\r

 implementation\r
 \r
 uses sysutils;\r
 implementation\r
 \r
 uses sysutils;\r


@@ -181,7 +199,7 @@ begin
   {$endif}\r
 end;\r
 \r
   {$endif}\r
 end;\r
 \r

-function makeinaddrv(addr:tbinip;port:string;var inaddr:tinetsockaddrv):integer;\r
+function makeinaddrv(addr:tbinip;port:ansistring;var inaddr:tinetsockaddrv):integer;\r

 begin\r
   result := 0;\r
 {  biniptemp := forwardlookup(addr,10);}\r
 begin\r
   result := 0;\r
 {  biniptemp := forwardlookup(addr,10);}\r


@@ -191,14 +209,14 @@ begin
     inAddr.InAddr.family:=AF_INET;\r
     inAddr.InAddr.port:=htons(strtointdef(port,0));\r
     inAddr.InAddr.addr:=addr.ip;\r
     inAddr.InAddr.family:=AF_INET;\r
     inAddr.InAddr.port:=htons(strtointdef(port,0));\r
     inAddr.InAddr.addr:=addr.ip;\r

-    result := sizeof(tinetsockaddr);\r
+    result := sizeof(tlinetsockaddr4);\r

   end else\r
   {$ifdef ipv6}\r
   if addr.family = AF_INET6 then begin\r
     inAddr.InAddr6.sin6_family:=AF_INET6;\r
     inAddr.InAddr6.sin6_port:=htons(strtointdef(port,0));\r
     inAddr.InAddr6.sin6_addr:=addr.ip6;\r
   end else\r
   {$ifdef ipv6}\r
   if addr.family = AF_INET6 then begin\r
     inAddr.InAddr6.sin6_family:=AF_INET6;\r
     inAddr.InAddr6.sin6_port:=htons(strtointdef(port,0));\r
     inAddr.InAddr6.sin6_addr:=addr.ip6;\r

-    result := sizeof(tinetsockaddr6);\r
+    result := sizeof(tlinetsockaddr6);\r

   end;\r
   {$endif}\r
 end;\r
   end;\r
   {$endif}\r
 end;\r


@@ -206,18 +224,18 @@ end;
 function inaddrsize(inaddr:tinetsockaddrv):integer;\r
 begin\r
   {$ifdef ipv6}\r
 function inaddrsize(inaddr:tinetsockaddrv):integer;\r
 begin\r
   {$ifdef ipv6}\r

-  if inaddr.inaddr.family = AF_INET6 then result := sizeof(tinetsockaddr6) else\r
+  if inaddr.inaddr.family = AF_INET6 then result := sizeof(tlinetsockaddr6) else\r

   {$endif}\r
   {$endif}\r

-  result := sizeof(tinetsockaddr);\r
+  result := sizeof(tlinetsockaddr4);\r

 end;\r
 \r
 {internal}\r
 {converts dotted v4 IP to longint. returns host endian order}\r
 end;\r
 \r
 {internal}\r
 {converts dotted v4 IP to longint. returns host endian order}\r

-function longip(s:string):longint;\r
+function longip(s:thostname):longint;\r

 var\r
   l:longint;\r
   a,b:integer;\r
 var\r
   l:longint;\r
   a,b:integer;\r

-function convertbyte(const s:string):integer;\r
+function convertbyte(const s:ansistring):integer;\r

 begin\r
   result := strtointdef(s,-1);\r
   if result < 0 then begin\r
 begin\r
   result := strtointdef(s,-1);\r
   if result < 0 then begin\r


@@ -268,7 +286,7 @@ begin
   ipstrtobin(s,result);\r
 end;\r
 \r
   ipstrtobin(s,result);\r
 end;\r
 \r

-function ipstrtobin(const s:string;var binip:tbinip):boolean;\r
+function ipstrtobin(const s:thostname;var binip:tbinip):boolean;\r

 begin\r
   binip.family := 0;\r
   result := false;\r
 begin\r
   binip.family := 0;\r
   result := false;\r


@@ -282,7 +300,10 @@ begin
   {$endif}\r
 \r
   {try v4}\r
   {$endif}\r
 \r
   {try v4}\r

-  binip.ip := htonl(longip(s));\r
+  // zipplet: htonl() expects a uint32 but longip() spits out longint.\r
+  // Because longip() is deprecated, we do not fix it but typecast.\r
+  //binip.ip := htonl(longip(s));\r
+  binip.ip := htonl(uint32(longip(s)));\r

   if (binip.ip <> 0) or (s = '0.0.0.0') then begin\r
     result := true;\r
     binip.family := AF_INET;\r
   if (binip.ip <> 0) or (s = '0.0.0.0') then begin\r
     result := true;\r
     binip.family := AF_INET;\r


@@ -290,7 +311,7 @@ begin
   end;\r
 end;\r
 \r
   end;\r
 end;\r
 \r

-function ipbintostr(const binip:tbinip):string;\r
+function ipbintostr(const binip:tbinip):thostname;\r

 var\r
   a:integer;\r
 begin\r
 var\r
   a:integer;\r
 begin\r


@@ -313,11 +334,11 @@ end;
 \r
 {\r
 IPv6 address binary to/from string conversion routines\r
 \r
 {\r
 IPv6 address binary to/from string conversion routines\r

-written by beware (steendijk at xs4all dot nl)\r
+written by beware\r

 \r
 - implementation does not depend on other ipv6 code such as the tin6_addr type,\r
   the parameter can also be untyped.\r
 \r
 - implementation does not depend on other ipv6 code such as the tin6_addr type,\r
   the parameter can also be untyped.\r

-- it is host endian neutral - binary format is aways network order\r
+- it is host endian neutral - binary format is always network order\r

 - it supports compression of zeroes\r
 - it supports ::ffff:192.168.12.34 style addresses\r
 - they are made to do the Right Thing, more efficient implementations are possible\r
 - it supports compression of zeroes\r
 - it supports ::ffff:192.168.12.34 style addresses\r
 - they are made to do the Right Thing, more efficient implementations are possible\r


@@ -326,9 +347,9 @@ written by beware (steendijk at xs4all dot nl)
 {fpc has hostaddrtostr6 and strtohostaddr6 but the later isnt implemented yet}\r
 \r
 \r
 {fpc has hostaddrtostr6 and strtohostaddr6 but the later isnt implemented yet}\r
 \r
 \r

-function ip6bintostr(const bin:tin6_addr):string;\r
+function ip6bintostr(const bin:tin6_addr):thostname;\r

 {base16 with lowercase output}\r
 {base16 with lowercase output}\r

-function makehex(w:word):string;\r
+function makehex(w:word):ansistring;\r

 begin\r
   result := '';\r
   if w >= 4096 then result := result + hexchars[w shr 12];\r
 begin\r
   result := '';\r
   if w >= 4096 then result := result + hexchars[w shr 12];\r


@@ -368,6 +389,13 @@ begin
       end;\r
     end;\r
   end;\r
       end;\r
     end;\r
   end;\r

+\r
+  {run length at least 2 0 words}\r
+  if (runlength = 1) then begin\r
+    runlength := 0;\r
+    runbegin := 0;\r
+  end;\r
+\r

   result := '';\r
   for a := 0 to runbegin-1 do begin\r
     if (a <> 0) then result := result + ':';\r
   result := '';\r
   for a := 0 to runbegin-1 do begin\r
     if (a <> 0) then result := result + ':';\r


@@ -384,10 +412,10 @@ begin
   end;\r
 end;\r
 \r
   end;\r
 end;\r
 \r

-function ip6strtobin(const s:string;var bin:tin6_addr):boolean;\r
+function ip6strtobin(const s:thostname;var bin:tin6_addr):boolean;\r

 var\r
   a,b:integer;\r
 var\r
   a,b:integer;\r

-  fields:array[0..7] of string;\r
+  fields:array[0..7] of ansistring;\r

   fieldcount:integer;\r
   emptyfield:integer;\r
   wordcount:integer;\r
   fieldcount:integer;\r
   emptyfield:integer;\r
   wordcount:integer;\r


@@ -498,25 +526,62 @@ begin
   result := comparebinip(ip1,ip2);\r
 end;\r
 \r
   result := comparebinip(ip1,ip2);\r
 end;\r
 \r

-{converts a binary IP to v4 if it is a v6 IP in the v4 range}\r
-procedure converttov4(var ip:tbinip);\r
+function needconverttov4(const ip:tbinip):boolean;\r

 begin\r
   {$ifdef ipv6}\r
   if ip.family = AF_INET6 then begin\r
     if (ip.ip6.u6_addr32[0] = 0) and (ip.ip6.u6_addr32[1] = 0) and\r
     (ip.ip6.u6_addr16[4] = 0) and (ip.ip6.u6_addr16[5] = $ffff) then begin\r
 begin\r
   {$ifdef ipv6}\r
   if ip.family = AF_INET6 then begin\r
     if (ip.ip6.u6_addr32[0] = 0) and (ip.ip6.u6_addr32[1] = 0) and\r
     (ip.ip6.u6_addr16[4] = 0) and (ip.ip6.u6_addr16[5] = $ffff) then begin\r

-      ip.family := AF_INET;\r
-      ip.ip := ip.ip6.s6_addr32[3];\r
+      result := true;\r
+      exit;\r

     end;\r
   end;\r
   {$endif}\r
     end;\r
   end;\r
   {$endif}\r

+\r
+  result := false;\r

 end;\r
 \r
 end;\r
 \r

-{------------------------------------------------------------------------------}\r
+{converts a binary IP to v4 if it is a v6 IP in the v4 range}\r
+procedure converttov4(var ip:tbinip);\r
+begin\r
+  {$ifdef ipv6}\r
+  if needconverttov4(ip) then begin\r
+    ip.family := AF_INET;\r
+    ip.ip := ip.ip6.s6_addr32[3];\r
+  end;\r
+  {$endif}\r
+end;\r
+\r
+\r
+{converts a binary IP to v6 if it is a v4 IP}\r
+procedure converttov6(var ip:tbinip);\r
+begin\r
+  {$ifdef ipv6}\r
+    if ip.family = AF_INET then begin\r
+      ip.family := AF_INET6;\r
+      ip.ip6.s6_addr32[3] := ip.ip;\r
+      ip.ip6.u6_addr32[0] := 0;\r
+      ip.ip6.u6_addr32[1] := 0;\r
+      ip.ip6.u6_addr16[4] := 0;\r
+      ip.ip6.u6_addr16[5] := $ffff;\r
+    end;\r
+  {$endif}\r
+end;\r
+\r
+\r
+{-----------biniplist stuff--------------------------------------------------}\r

 \r
 \r

+const\r
+  biniplist_prefix: ansistring = 'bipl'#0;\r
+  //fpc 1.0.x doesn't seem to like use of length function in a constant \r
+  //definition\r
+  //biniplist_prefixlen=length(biniplist_prefix);\r
+\r
+  biniplist_prefixlen=5;\r
+  \r

 function biniplist_new:tbiniplist;\r
 begin\r
 function biniplist_new:tbiniplist;\r
 begin\r

-  result := '';\r
+  result := biniplist_prefix;\r

 end;\r
 \r
 procedure biniplist_add(var l:tbiniplist;ip:tbinip);\r
 end;\r
 \r
 procedure biniplist_add(var l:tbiniplist;ip:tbinip);\r


@@ -530,7 +595,7 @@ end;
 \r
 function biniplist_getcount(const l:tbiniplist):integer;\r
 begin\r
 \r
 function biniplist_getcount(const l:tbiniplist):integer;\r
 begin\r

-  result := length(l) div sizeof(tbinip);\r
+  result := (length(l)-biniplist_prefixlen) div sizeof(tbinip);\r

 end;\r
 \r
 function biniplist_get(const l:tbiniplist;index:integer):tbinip;\r
 end;\r
 \r
 function biniplist_get(const l:tbiniplist;index:integer):tbinip;\r


@@ -539,18 +604,18 @@ begin
     fillchar(result,sizeof(result),0);\r
     exit;\r
   end;\r
     fillchar(result,sizeof(result),0);\r
     exit;\r
   end;\r

-  move(l[index*sizeof(tbinip)+1],result,sizeof(result));\r
+  move(l[index*sizeof(tbinip)+1+biniplist_prefixlen],result,sizeof(result));\r

 end;\r
 \r
 procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);\r
 begin\r
   uniquestring(l);\r
 end;\r
 \r
 procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);\r
 begin\r
   uniquestring(l);\r

-  move(ip,l[index*sizeof(tbinip)+1],sizeof(ip));\r
+  move(ip,l[index*sizeof(tbinip)+1+biniplist_prefixlen],sizeof(ip));\r

 end;\r
 \r
 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);\r
 begin\r
 end;\r
 \r
 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);\r
 begin\r

-  setlength(l,sizeof(tbinip)*newlen);\r
+  setlength(l,(sizeof(tbinip)*newlen)+biniplist_prefixlen);\r

 end;\r
 \r
 procedure biniplist_free(var l:tbiniplist);\r
 end;\r
 \r
 procedure biniplist_free(var l:tbiniplist);\r


@@ -560,10 +625,10 @@ end;
 \r
 procedure biniplist_addlist;\r
 begin\r
 \r
 procedure biniplist_addlist;\r
 begin\r

-  l := l + l2;\r
+  l := l + copy(l2,biniplist_prefixlen+1,maxlongint);\r

 end;\r
 \r
 end;\r
 \r

-function biniplist_tostr(const l:tbiniplist):string;\r
+function biniplist_tostr(const l:tbiniplist):thostname;\r

 var\r
   a:integer;\r
 begin\r
 var\r
   a:integer;\r
 begin\r


@@ -575,4 +640,50 @@ begin
   result := result + ')';\r
 end;\r
 \r
   result := result + ')';\r
 end;\r
 \r

+function isbiniplist(const l:tbiniplist):boolean;\r
+var\r
+  i : integer;\r
+begin\r
+  for i := 1 to biniplist_prefixlen do begin\r
+    if biniplist_prefix[i] <> l[i] then begin\r
+      result := false;\r
+      exit;\r
+    end;\r
+  end;\r
+  result := true;\r
+end;\r
+\r
+procedure addipsoffamily(var l:tbiniplist;const l2:tbiniplist;family:integer);\r
+var\r
+  a:integer;\r
+  biniptemp:tbinip;\r
+begin\r
+  for a := biniplist_getcount(l2)-1 downto 0 do begin\r
+    biniptemp := biniplist_get(l2,a);\r
+    if (biniptemp.family = family) then biniplist_add(l,biniptemp);\r
+  end;\r
+end;\r
+\r
+function getfamilybitlength(family:integer):integer;\r
+begin\r
+  {$ifdef ipv6}\r
+  if family = AF_INET6 then result := 128 else\r
+  {$endif}\r
+  if family = AF_INET then result := 32\r
+  else result := 0;\r
+end;\r
+\r
+function getbinipbitlength(const ip:tbinip):integer;\r
+begin\r
+  result := getfamilybitlength(ip.family);\r
+end;\r
+\r
+function getipstrbitlength(const ip:thostname):integer;\r
+var\r
+  biniptemp:tbinip;\r
+begin\r
+  ipstrtobin(ip,biniptemp);\r
+  result := getbinipbitlength(biniptemp);\r
+end;\r
+\r

 end.\r
 end.\r