bug in DHCPv6 option parse for on commit {} ?

[Bill Shirley]

I use (IPv6):
log (
   info,
     concat (
       "  Lease:", pick-first-value(binary-to-ascii(10, 32, "", config-option server.default-lease-time), "<none>")
       .
       .

Bill

On 12/22/2016 10:41 AM, perl-list wrote:
>
> having something like this in the dhcpd.conf file for DHCPv6:
>
>
> on commit {
>
>         if exists dhcp6.ia-na {
>
>                 log(debug,
>
>                         concat( "LEASED,",
>
> "IPTIME,",binary-to-ascii(10, 32, "", substring(option dhcp6.ia-na,36,4)),","
>
>                         )
>
>                 );
>
>         }
>
> }
>
> Will produce a value for IPTIME that is equal to the time requested by the client instead of what was given by the server.
>
> For example:
>
> Client (Redhat Enterprise Linux 7 - ISC DHCP 4.2.5) sends a Renew for an IPv6 address via DHCPv6 requesting the following 
> times (As seen in wireshark capture):
>
> T1: 3600
> T2: 5400
> Preferred Lifetime: 7200
> Valid Lifetime: 7500
>
> Server (generic Linux - ISC DHCP 4.3.3) is configured with this time setting in the pool6 {} statement:
>
> default-lease-time 600;
>
> Server responds with times like this (as seen in wireshark capture):
>
> T1: 0
> T2: 0
> Preferred Lifetime: 375
> Valid Lifetime: 600
>
> What is logged in the log file is 7500 not 600.
>
> The client lease file shows the following times:
>
> Renew: 0
> Rebind: 0
> Preferred Lifetime: 375
> Valid Lifetime: 600
>
> So, it seems that the dhcp options available in on commit {} are what the client sent in instead of those the server sent in 
> response?  Is that a bug?  Or do I not understand how on commit {} works?  I assumed that on commit {} would have access to 
> the options as set by the server that were sent back to the client.
>
>
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