logging the lease time *sent* to clients in an "on commit" block
Phil Mayers
p.mayers at imperial.ac.uk
Fri May 18 15:44:34 UTC 2007
All,
What syntax can I use to get the ACTUAL IP address lease time (option
51) the server sends to the client? We have a need to do detailed
logging of leases handed out including the lease time.
If I use:
on commit {
set macaddr = binary-to-ascii(16,8,":",substring(hardware,1,6));
set ipaddr = binary-to-ascii(10,8,".",leased-address);
set leasetime = pick-first-value(
binary-to-ascii(10, 32, "", option dhcp-lease-time),
"unset"
);
set log-msg = concat(
"commit ",
" mac=", macaddr,
" ip=", ipaddr,
" leasetime=", leasetime
);
log(info, log-msg);
}
...then it logs the client *requested* lease time, which is unset 99% of
the time and in any event not definitive.
Using "config-option dhcp-lease-time" just gets me "null" i.e. it logs
"unset" all the time.
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