Subject: [Hipsec] Pre-1 version of draft-moskowitz-hip-09

From: [email-masked] (Petri Jokela)
Date: Fri Jan 9 07:31:01 2004

Henderson, Thomas R wrote:
> Petri,
> Please see below a proposed Appendix F.  Other implementors
> may want to check these results, since getting checksums to
> agree has been a sore point in interoperability testing.

Thanks Tom! Has someone already verified these results with other 
implementations?

/petri

> Tom
> 
> Internet-Draft           Host Identity Protocol            December 2003
>    
> Appendix F. Example checksums for HIP packets
>    
>    The HIP checksum for HIP packets is specified in Section 6.1.2.  
>    Checksums for TCP and UDP packets running over HIP-enabled security 
>    associations are specified in Section 3.5.  The examples below use IP 
>    addresses of 192.168.0.1 and 192.168.0.2 (and their respective IPv4-
>    compatible IPv6 formats), and type 1 HITs with the first two bits "01" 
>    followed by 124 zeroes followed by a decimal 1 or 2, respectively.  
>    
> F.1. IPv6 HIP example (I1) 
>    
>    Source Address:                 ::c0a8:0001
>    Destination Address:            ::c0a8:0002
>    Upper-Layer Packet Length:      40              0x28
>    Next Header:                    99              0x63
>    Payload Protocol:               59              0x3b
>    Header Length:                  4               0x04
>    Packet Type:                    1               0x01
>    Version:                        1               0x1
>    Reserved:                       0               0x0
>    Control:                        0               0x0000
>    Checksum:                       49672           0xc208       
>    Sender's HIT:                   4000::0001
>    Receiver's HIT:                 4000::0002
>    
> F.2. IPv4 HIP packet (I1)
>    
>    The IPv4 checksum value for the same example I1 packet is the same as 
>    the IPv6 checksum (since the checksums due to the IPv4 and IPv6 
>    pseudo-header components are the same).
>    
> F.3. TCP segment 
>    
>    Regardless of whether IPv6 or IPv4 is used, the TCP and UDP sockets 
>    use the IPv6 pseudo-header format [8], with the HITs used in place of 
>    the IPv6 addresses.
>    
>    Sender's HIT:                   4000::0001
>    Receiver's HIT:                 4000::0002
>    Upper-Layer Packet Length:      20              0x14
>    Next Header:                    6               0x06
>    Source port:                    32769           0x8001
>    Destination port:               22              0x0016
>    Sequence number:                1               0x00000001
>    Acknowledgment number:          0               0x00000000
>    Header length:                  20              0x14
>    Flags:                          SYN             0x02
>    Window size:                    5840            0x16d0
>    Checksum:                       54519           0xd4f7
>    Urgent pointer:                 0               0x0000
> 
> 
> 

-- 
Petri Jokela                        Tel:    +358 9 299 2413
Research scientist                  Fax:    +358 9 299 3535
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Oy L M Ericsson Ab                  email: [email-masked]