From owner-cvs-all  Sat Mar 11  3:17:30 2000
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From: Yoshinobu Inoue <shin@FreeBSD.org>
Date: Sat, 11 Mar 2000 03:17:26 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/net if_gif.c src/sys/netinet in_gif.c
         tcp_input.c
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shin        2000/03/11 03:17:26 PST

  Modified files:
    sys/net              if_gif.c 
    sys/netinet          in_gif.c tcp_input.c 
  Log:
  IPv6 6to4 support.
  
     Now most big problem of IPv6 is getting IPv6 address
     assignment.
     6to4 solve the problem. 6to4 addr is defined like below,
  
            2002: 4byte v4 addr : 2byte SLA ID : 8byte interface ID
  
     The most important point of the address format is that an IPv4 addr
     is embeded in it. So any user who has IPv4 addr can get IPv6 address
     block with 2byte subnet space. Also, the IPv4 addr is used for
     semi-automatic IPv6 over IPv4 tunneling.
  
     With 6to4, getting IPv6 addr become dramatically easy.
     The attached patch enable 6to4 extension, and confirmed to work,
     between "Richard Seaman, Jr." <dick@tar.com> and me.
  
  Approved by: jkh
  
  Reviewed by: itojun
  
  Revision  Changes    Path
  1.4       +18 -3     src/sys/net/if_gif.c
  1.4       +43 -2     src/sys/netinet/in_gif.c
  1.106     +2 -2      src/sys/netinet/tcp_input.c



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