Ethereal-cvs: [Ethereal-cvs] cvs commit: ethereal AUTHORS packet-gtp.c

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From: Guy Harris <guy@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 6 Nov 2002 16:59:22 -0600 (CST)
guy         2002/11/06 16:59:22 CST

  Modified files:
    .                    AUTHORS packet-gtp.c 
  Log:
  From Andreas Trauer:
  
  	Replace the handling of PPP packets over GTPv1 and also
  	establish the handling of PPP packet over GTPv0.  Additionally
  	IPv6 packets are handled in GTPv0 and GTPv1.
  
  	Explanation:
  
  	- old solution: examining the known PPP protocols is a tough
  	  task, because there might be more in the future -> the list
  	  must be extended more and more (the octet 0x00 has already
  	  been added for PPP network layer protocols, but for protocol
  	  field compression a lot of protocols must be inserted for
  	  IPv4(0x21), IPv6(0x57), maybe IPX (0x2b) or AppleTalk (0x29),
  	  ...)
  
  	- new solution: It is easier the other way: the most significant
  	  nibble of the first octet must be 4 for IPv4 and 6 for IPv6.
  	  All other values are assumed to be PPP packets, including
  	  packets beginning with values 0x40-0x44 (header too short for
  	  IPv4 packet) and value 0x4f (PPP protocol type (IPv6 header
  	  compression protocol) taking precedence over IPv4 packets with
  	  header length of 60 octets).
  
  Revision  Changes    Path
  1.656     +5 -0      ethereal/AUTHORS
  1.44      +79 -47    ethereal/packet-gtp.c