From: m@rtij.nl.invlalid   
      
   On Sun, 15 Nov 2009 20:02:47 +0000, Jorgen Grahn wrote:   
      
   >   
   > People who know more will have to correct me, but I think you *do* have   
   > that functionality in IPv4. You have the IP options, and you can stick a   
   > header between the IP header and the UDP or TCP header (like IPSEC   
   > does).  It's just less elegant and efficient (I think someone upthread   
   > mentioned that).   
      
   There are tcp options and as a special case, the ipv6 header chaining is   
   used in ipv4 for ipsec, and for ipsec only.   
      
   M4   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)