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Cisco Cisco Firepower Management Center 2000 Guía Del Desarrollador

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Version 5.3
Sourcefire 3D System eStreamer Integration Guide
267
Understanding Discovery & Connection Data Structures
Host Discovery and Connection Data Blocks
Chapter 4
The following diagram shows the basic structure of a User Client Application data 
block:
The 
 table describes the fields of the 
User Client Application data block.
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 Client Application Block Type (138)
User Client Application Block Length
IP
 Range
Specification
Generic List Block Type (31)
Generic List Block Length
IP Range Specification Data Blocks*
Application Protocol ID
Client Application ID
Ve
rs
io
n
String Block Type (0)
String Block Length
Version...
Payload Type
Web Application ID
User Client Application Data Block Fields 
F
IELD
N
UMBER
 
OF
 B
YTES
D
ESCRIPTION
User Client 
Application 
Block Type
uint32
Initiates a User Client Application data block. This 
value is always 138.
User Client 
Application 
Block Length
uint32
Total number of bytes in the User Client 
Application data block, including eight bytes for 
the user client application block type and length 
fields, plus the number of bytes of user client 
application data that follows.
Generic List 
Block Type
uint32
Initiates a Generic List data block comprising IP 
Range Specification data blocks conveying IP 
address range data. This value is always 31.