"raw packet not available" when execute() on release (solved)

[Nicolas C.]

Le 03/05/2012 11:46, Niall O'Reilly a écrit :
>
> On 1 May 2012, at 16:52, Nicolas C. wrote:
>
>> The problem is that I really need the IPv4 address and the hardware address, I found a workaround by registering a TXT record to store them but it would be so much easier if I had them directly.
>
> 	I have a trick for storing request-time data in the lease object.
> 	This allows me to tag leases for later statistical analysis.
>
> 	NB! I have no idea whether this will be useful for what you need.
>
> 	What I do is to set a variable from a request option by coding a
> 	global configuration command such as the following.
>
> set vendor-string = option vendor-class-identifier;
>
> 	By using several such commands (some with shared-network or subnet scope),
> 	I can obtain potentially useful tags in the lease object.
>
> lease 137.43.175.156 {
>    starts 5 2011/05/20 17:43:09;
>    ends 5 2011/05/20 17:45:09;
>    tstp 5 2011/05/20 17:45:09;
>    cltt 5 2011/05/20 17:43:09;
>    binding state free;
>    hardware ethernet [none of your business];
>    set vendor-string = "dhcpcd 4.0.15";
>    set link-label = "ucd-guest";
>    set subnet-prefix = "137.43.175.0/24";
>    set pool-label = "ucd_guest_l1";
> }
>
> 	I hope this helps.

Hello,

Your reply was helpful. Instead of using TXT records, I simply created 
two new dhcp options to store what I needed. This is much simpler and 
works like a charm :

# Declared globally
option cache-ipv4 code 190 = text;
option cache-mac code 191 = text;

# Declared in the subnet
set cache-ipv4 = binary-to-ascii(10, 8, ".", leased-address);
set cache-mac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));

on expiry {
         execute (
                 "/usr/local/bin/ddns-ipv6",
                 prefix,
                 "-d",
                 ddns-hostname,
                 cache-mac,
                 cache-ipv4
         );
}

Thanks!

Nicolas