Cisco Cisco Firepower Management Center 4000 Entwickleranleitung

The User Protocol data block is used to contain information about added protocols, the type of the 
protocol, and lists of IP address and MAC address ranges for the hosts with the protocol. The User 
Protocol data block has a block type of 57 in the series 1 group of blocks.

The following diagram shows the basic structure of a User Protocol data block:

List Block Length

uint32

Number of bytes in the list. This number includes the eight bytes of 
the list block type and length fields, plus all encapsulated Attribute 
Address data blocks. 

This field is followed by zero or more Attribute Address data blocks.

Attribute Address 
Block Type

uint32

Initiates the first Attribute Address data block. This data block can 
be followed by other Attribute Address data blocks up to the limit 
defined in the list block length field.

Attribute Address 
Block Length

uint32

Number of bytes in the Attribute Address data block, including eight 
bytes for the block type and header fields, plus the number of bytes 
in the attribute address.

Attribute Address

variable

Attribute Address data as documented in 

. 

Byte

0

1

2

3

Bit

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

User Protocol Block Type (57)

User Protocol Block Length

IP Address 

Ranges

Generic List Block Type (31)

Generic List Block Length

IP Range Specification Data Blocks*

MAC Add.

Ranges

Generic List Block Type (31)

Generic List Block Length

MAC Range Specification Data Blocks...

Protocol Type

Protocol