[Dnsmasq-discuss] adjustment for dhcp_release.c

[Rene Stoutjesdijk]

Goodday,

earlier today i did sent out an email (but probably something went
wrong) which i do repat later ,see QUOTED text at the end of this
email.

After the initial email i've done some additional tests, and it looks
like the dhcp_relase.c program is "only" working when you provide
information just out of a ip pool.

However when you provide ip addresses based upon an eg. circuit-id
then the address isn't cleared.
As it looks like the circuit-id (and maybe remote-id) are also checked
upon beofre doing the clearing.

Is above assumption correct, and if yes how can the dhcp_release.c be
adjusted so that also the cirucitid and/or remote id can be provided.


i've als tested the above assumption with the following scenario:
do a dhcp DORA process based upon circuit-id CUST14
after the ip address was retrieved i changed the circuit-id on the
switch towards CUST14a
then did a dhcp release from the end station, and the lease file wasn't cleared.

then i changed the switch back to CUST14

i repeated above steps, and after the RELEASE message the lease file
was cleared for that entry.

so above mentioned assumption looks to be true

wkr
rene

see text below for previous email, which apparently went wrong).

QUOTE

Goodday,

i do have a question about dhcp_release.c

I'm trying to clear an entry within the dhcp lease table.

At this moment i'm providing the ip address based upon dhcp-circuitid.
At this moment one of the en-users changed his mac address and due to
that resins he can't connect until his old release is expired. So i
wanted to clear manually his old entry from the lease table.

For this i wanted to use the command:

./dhcp_release eth1 10.64.1.0 a8:20:66:03:61:bc 01:a8:20:66:03:61:bc


based upon his entry within the lease file:

1420293992 a8:20:66:03:61:bc 10.64.1.0 Renes-MBP 01:a8:20:66:03:61:bc


But as soon as i execute the command i do see the following entry
within the syslog file:

Jan  3 14:04:58 localhost dnsmasq-dhcp[3326]: 0 available DHCP range:
10.64.1.0 -- 10.64.1.0

and the entry isn't cleared from the table (and the enduser with his
new mac address can't connect).


i do have a basic dhcp file which looks like:

dhcp-range=net:CUST14,10.64.1.0,10.64.1.0,255.192.0.0,4h
dhcp-circuitid=CUST14,CUST14




What am i doing wrong?

thx in advance for your help.

UNQUOTE