doc: fix display of icmp code and type array

diff --git a/doc/userguide/rules/header-keywords.rst b/doc/userguide/rules/header-keywords.rst
index 0a51d050f9f3633e6949237cf09d2fb583305374..8ded4c41b2c0de43b91e62108e40ff2e426f8246 100644 (file)
--- a/doc/userguide/rules/header-keywords.rst
+++ b/doc/userguide/rules/header-keywords.rst
@@ -499,43 +499,75 @@ The following lists the meaning of all ICMP types. When a code is not listed,
 only type 0 is defined and has the meaning of the ICMP code, in the table above.
 A recent table can be found `at the website of IANA <https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xhtml>`_
 
-==========  ==========  =========================================================================
-ICMP Code   ICMP Type   Description
-==========  ==========  =========================================================================
-3           - 0         - Net Unreachable
-            - 1         - Host Unreachable
-            - 2         - Protocol Unreachable
-            - 3         - Port Unreachable
-            - 4         - Fragmentation Needed and Don't Fragment was Set
-            - 5         - Source Route Failed
-            - 6         - Destination Network Unknown
-            - 7         - Destination Host Unknown
-            - 8         - Source Host Isolated
-            - 9         - Communication with Destination Network is Administratively Prohibited
-            - 10        - Communication with Destination Host is Administratively Prohibited
-            - 11        - Destination Network Unreachable for Type of Service
-            - 12        - Destination Host Unreachable for Type of Service
-            - 13        - Communication Administratively Prohibited
-            - 14        - Host Precedence Violation
-            - 15        - Precedence cutoff in effect
-5           - 0         - Redirect Datagram for the Network (or subnet)
-            - 1         - Redirect Datagram for the Host
-            - 2         - Redirect Datagram for the Type of Service and Network
-            - 3         - Redirect Datagram for the Type of Service and Host
-9           - 0         - Normal router advertisement
-            - 16        - Doest not route common traffic
-11          - 0         - Time to Live exceeded in Transit
-            - 1         - Fragment Reassembly Time Exceeded
-12          - 0         - Pointer indicates the error
-            - 1         - Missing a Required Option
-            - 2         - Bad Length
-40          - 0         - Bad SPI
-            - 1         - Authentication Failed
-            - 2         - Decompression Failed
-            - 3         - Decryption Failed
-            - 4         - Need Authentication
-            - 5         - Need Authorization
-==========  ==========  =========================================================================
++-----------+-----------+-----------------------------------------------------------------------+
+| ICMP Code | ICMP Type | Description                                                           |
++===========+===========+=======================================================================+
+| 3         | 0         | Net Unreachable                                                       |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 1         | Host Unreachable                                                      |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 2         | Protocol Unreachable                                                  |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 3         | Port Unreachable                                                      |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 4         | Fragmentation Needed and Don't Fragment was Set                       |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 5         | Source Route Failed                                                   |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 6         | Destination Network Unknown                                           |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 7         | Destination Host Unknown                                              |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 8         | Source Host Isolated                                                  |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 9         | Communication with Destination Network is Administratively Prohibited |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 10        | Communication with Destination Host is Administratively Prohibited    |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 11        | Destination Network Unreachable for Type of Service                   |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 12        | Destination Host Unreachable for Type of Service                      |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 13        | Communication Administratively Prohibited                             |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 14        | Host Precedence Violation                                             |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 15        | Precedence cutoff in effect                                           |
++-----------+-----------+-----------------------------------------------------------------------+
+| 5         | 0         | Redirect Datagram for the Network (or subnet)                         |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 1         | Redirect Datagram for the Host                                        |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 2         | Redirect Datagram for the Type of Service and Network                 |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 3         | Redirect Datagram for the Type of Service and Host                    |
++-----------+-----------+-----------------------------------------------------------------------+
+| 9         | 0         | Normal router advertisement                                           |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 16        | Doesn't route common traffic                                          |
++-----------+-----------+-----------------------------------------------------------------------+
+| 11        | 0         | Time to Live exceeded in Transit                                      |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 1         | Fragment Reassembly Time Exceeded                                     |
++-----------+-----------+-----------------------------------------------------------------------+
+| 12        | 0         | Pointer indicates the error                                           |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 1         | Missing a Required Option                                             |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 2         | Bad Length                                                            |
++-----------+-----------+-----------------------------------------------------------------------+
+| 40        | 0         | Bad SPI                                                               |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 1         | Authentication Failed                                                 |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 2         | Decompression Failed                                                  |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 3         | Decryption Failed                                                     |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 4         | Need Authentication                                                   |
+|           +-----------+-----------------------------------------------------------------------+
+|           | 5         | Need Authorization                                                    |
++-----------+-----------+-----------------------------------------------------------------------+
 
 
 icmp_id