Cisco Cisco Firepower Management Center 2000 Entwickleranleitung

The following table describes the fields in the ICMP Code data block.

The eStreamer service uses the Access Control Rule Policy Rule Reason Data block to contain 
information about access control policy rule IDs. This data block has a block type of 21 in series 2.

The following diagram shows the structure of the Access Control Policy Rule ID metadata block.

ICMP Code Data 
Block Type

uint32

Initiates a ICMP Code data block. This value is always 

20

.

ICMP Code Data 
Block Length

uint32

Total number of bytes in the ICMP Code data block, including eight 
bytes for the ICMP Code data block type and length fields, plus the 
number of bytes of data that follows. 

Code

uint16

The ICMP code of the event.

Type

uint16

The ICMP type of the event.

Protocol

uint16

IANA-specified protocol number. For example:

0

 - IP

1

 - ICMP

6

 - TCP

17

 - UDP

String Block Type

uint32

Initiates a String data block containing the description of the ICMP 
code. This value is always 

0

.

String Block 
Length

uint32

The number of bytes included in the name String data block, 
including eight bytes for the block type and header fields plus the 
number of bytes in the Description field.

Description

string

Description of the ICMP code for the event.

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

Access Control Policy Rule Reason Data Block Type (21)

Access Control Policy Rule Reason Data Block Length

Description

Reason

String Block Type (0)

String Block Type (0), continued

String Block Length

String Block Length, continued

Description...