Michael & All,

Here is another update for the `unbound-dhcp-leases-bridge` code.

I believe I have copied all the processes done in `unbound-dhcp-leases-bridge`, so if I am missing a function please speak up.

Everything seems to be working A-OK (for me!).  
- I’ve re-written much/most of the code, 
- added bash functions for unbound writes & deletes to get rid of duplicate code, 
- and added some error (invalid) checks.

Since the code is not parsing the dhcp-leases I believe it _may_ be fast enough for lots of dhcp clients.
But I have no way of knowing without your help!

I’ve written two "compare" scripts:
1) if you want to compare the old with new.  This requires some updates to the script below.
2) or if want to compare `/etc/unbound/dhcp-leases.conf` plus `/etc/unbound/hosts.conf` to the unbound cache `unbound-control list_local_data`.



Static Hosts
————————————

> • Static hosts still need to be parsed into unbound hosts.conf file

I am looking for help with this since I dont fully understand the "read_static_hosts" section:
https://github.com/ipfire/ipfire-2.x/blob/master/config/unbound/unbound-dhcp-leases-bridge#L183-L223

- Why are the static hosts read into the "unbound-dhcp-leases-bridge" program?  
- Does this section write the static hosts into the the unbound `/etc/unbound/hosts.conf` file? (I dont believe it does)  
- Or are the static hosts for reference only?

Currently I do a quick grep search of the `/etc/unbound/hosts.conf` file for IP address and hostname in Line 142. 
If an IP/hostname exists in the static hosts file, then I exit.

So I think this is what the unbound-dhcp-leases-bridge does…



Hostnames with Spaces
—————————————————————

> • Properly handle hostnames with spaces

I remove the spaces in the hostname 
- yes, I have one device with this non-legit hostname

Is this OK?








===============================================================================
NOTE: Do not place this into a Production environment - only for Test environment.

• If placed into Test environment this current script will terminate "unbound-dhcp-leases-bridge".
• Do not run the `dhcpEvent.sh` script and "unbound-dhcp-leases-bridge" in parallel.
===============================================================================


Once again I am looking for help, feedback, thoughts and comments!


Jon



> On Dec 8, 2023, at 10:26 AM, jon <jon.murphy(a)ipfire.org> wrote:
> 
> The first script did not place A & PTR records into the unbound cache and this version does!
> 
> Once again I am looking for your feedback, thoughts and comments!
> 
> 
> Jon
> 
> ===============================================================================
> 
> NOTE: Do not place this into a Production environment - only for Test environment.
> 
> 
> Description of Proof of Concept
> ———————————————————————————————
> 
> Transfers DHCP lease information to unbound DNS
> 
> • Enable DHCP On Commit/Release/Expire via dhcpd.conf (or dhcpd.conf.local)
> • A new (or changed or removed) dynamic/fixed lease causes Script to run
> • Script adds A & PTR records on Commit:
>    • to unbound dhcp-leases.conf file
>    • to unbound cache via "unbound-control load-data"
> • Script removes A & PTR records on Release or Expiry of lease
> 
> 
> The Script
> ———————————
> 
> • Handles dynamic and fixed leases
> • Static hosts checked for duplicates
> • Re-enabled unbound-control local_data
>    • unbound reloads not needed
> • A & PTR records survive IPFire reboot, unbound restart
>    • no delays from difficult dhcp-leases parsing
> 
> Not completed (yet):
> • Static hosts still need to be parsed into unbound hosts.conf file
> • Properly handle hostnames with spaces
>    • non-legit need to change to dashes or be removed (or completely dropped)
> • to be checked with large amount of clients
>    • I’ve tested with 6 devices on test system and ~40 devices on production
> 
> 
> <dhcpEvent_v15.sh.txt><dhcpd.conf.local>
> 
> 
> 
> NOTE: Do not place this into a Production environment.  Only for Test environment.
> 
> • If placed into Test environment this current script will terminate "unbound-dhcp-leases-bridge".
> • Do not run the `dhcpEvent.sh` script and "unbound-dhcp-leases-bridge" in parallel.
> 
>