conntrack: T4523: Extend conntrack output direciton, mark, zone

[sever-sever]

Change Summary

Extent op-mode show conntrack table ipv4
Add the ability to see the direction of flow:
origianl - Original src, Original dst
reply - Reply src, Reply dst

Add mark and zone options

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://phabricator.vyos.net/T4523

Component(s) name

conntrack

Proposed changes

How to test

Current output:

vyos@r14:~$ show conntrack table ipv4 
Connection id    Source              Destination          Protocol    State        Timeout
---------------  ------------------  -------------------  ----------  -----------  ---------
3409467955       192.168.122.14:22   192.168.122.1:59856  tcp         ESTABLISHED  431999
2033666077       255.255.255.255:67  0.0.0.0:68           udp                      19

Updated output

vyos@r14# run show conntrack table ipv4 
Id          Original src         Original dst       Reply src          Reply dst            Protocol    State        Timeout    Mark    Zone
----------  -------------------  -----------------  -----------------  -------------------  ----------  -----------  ---------  ------  ------
3529842617  192.168.122.1:53508  192.168.122.14:22  192.168.122.14:22  192.168.122.1:53508  tcp         ESTABLISHED  431999     0
179791316   192.0.2.10           1.1.1.1            1.1.1.1            192.168.122.14       icmp                     29         0       59651
[edit]
vyos@r14# 

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly