Unsure of linelog configuration

[David Lake]

Perfect -thank you.   I have a great standalone lab so now I understand the interaction I can start to play 😊

Thank you for the very quick and detailed explanation!

David

From: Freeradius-Users <freeradius-users-bounces+d.lake=surrey.ac.uk at lists.freeradius.org> on behalf of Matthew Newton via Freeradius-Users <freeradius-users at lists.freeradius.org>
Date: Thursday, 31 July 2025 at 14:07
To: FreeRadius users mailing list <freeradius-users at lists.freeradius.org>
Cc: Matthew Newton <mcn at freeradius.org>
Subject: Re: Unsure of linelog configuration

On 31/07/2025 13:41, David Lake wrote:
> (4) dhcp_sqlippool:    --> DHCP: Allocated IP: 192.168.2.101 from ipoe
> (cid 0x010c3311bf0000 chaddr 0c:33:11:bf:00:00 giaddr 192.168.2.1)
> (4)     [dhcp_sqlippool] = ok
> (4) linelog_dhcp: EXPAND %t %{control:Module-Success-Message}
> (4) linelog_dhcp:    --> Thu Jul 31 12:32:31 2025 DHCP: Allocated IP:
> 192.168.2.101 from ipoe (cid 0x010c3311bf0000 chaddr 0c:33:11:bf:00:00
> giaddr 192.168.2.1)


Ah, OK. dhcp_sqlippool calls the authorize method, which emits some
logging information that ends up in Module-Success-Message.


> After an ACK I see this:
>
> (5) dhcp_sqlippool:    --> UPDATE dhcpippool SET expiry_time = NOW() +
> INTERVAL 7200 SECOND, counter = counter + 1 WHERE pool_name = 'ipoe' AND
> pool_key = '0x010c3311bf0000' AND framedipaddress = '192.168.2.101'
> (5) dhcp_sqlippool: Executing query: UPDATE dhcpippool SET expiry_time =
> NOW() + INTERVAL 7200 SECOND, counter = counter + 1 WHERE pool_name =
> 'ipoe' AND pool_key = '0x010c3311bf0000' AND framedipaddress =
> '192.168.2.101'
> rlm_sql_mysql: Rows matched: 1  Changed: 1  Warnings: 0
...

> (5) linelog_dhcp: EXPAND %t %{control:Module-Success-Message}
> (5) linelog_dhcp:    --> Thu Jul 31 12:32:32 2025

dhcp_sqlippool_request calls the accounting method, which doesn't output
any logging, so doesn't update the Module-Success-Message attribute.

You'll be better to just log what you want, rather than using that
attribute. Something like

   message="%t %{request:DHCP-Client-Hardware-Address}
%{reply:DHCP-Your-IP-Address} from pool %{Pool-Name}"

Add whatever attributes you need (you can call the `debug_all` policy
before `linelog_dhcp` to show them all in the debug output if you're not
sure what is available).

--
Matthew
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