Enterprise 0 Type 1 Parsing

[bigmstone]

Currently only supports type 1 of the following list:

enum header_protocol {
   ETHERNET-ISO88023    = 1,
   ISO88024-TOKENBUS    = 2,
   ISO88025-TOKENRING   = 3,
   FDDI                 = 4,
   FRAME-RELAY          = 5,
   X25                  = 6,
   PPP                  = 7,
   SMDS                 = 8,
   AAL5                 = 9,
   AAL5-IP              = 10, /* e.g. Cisco AAL5 mux */
   IPv4                 = 11,
   IPv6                 = 12,
   MPLS                 = 13,
   POS                  = 14  /* RFC 1662, 2615 */
}

And the support for type 1 uses static locations inside a packet so certain assumptions are made about frame/packet header length. This can, and should, be modified to take into account more options from the list, as well as allow for dynamic parsing of those frames depending on header length variables.