#-------------------------------
# Global options
#-------------------------------
authoritative;

option domain-name "example.net";
option domain-name-servers 192.168.110.4;
option ntp-servers 192.168.110.4;
option routers 192.168.110.10;

default-lease-time 86400; # 24 hours.
max-lease-time 604800; # 7 days.

lease-file-name "/var/lib/dhcp/dhcpd.leases";

#-------------------------------
# Subnet
#-------------------------------
subnet 192.168.110.0 netmask 255.255.255.0 {
	range 192.168.110.100 192.168.110.199;
}

#-------------------------------
# Fixed address
#-------------------------------
host party {
	hardware ethernet 00:0C:29:14:6E:24;
	fixed-address 192.168.110.12;
}

host work {
	hardware ethernet 00:0c:29:0a:83:af;
	fixed-address 192.168.110.3;
}

#-------------------------------
# Dynamic DNS
#-------------------------------
on commit {
	set noname = concat("dhcp-", binary-to-ascii(10, 8, "-", leased-address));
	set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
	set ClientDHCID = concat (
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,1,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,2,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,3,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,4,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,5,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,6,1))),2)
			);
	set ClientName = pick-first-value(option host-name, config-option host-name, client-name, noname);
	#log(concat("Commit: IP: ", ClientIP, " DHCID: ", ClientDHCID, " Name: ", ClientName));
	execute("/usr/local/bin/dhcp-dyndns.sh", "add", ClientIP, ClientDHCID, ClientName);
}

on release {
	set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
	set ClientDHCID = concat (
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,1,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,2,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,3,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,4,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,5,1))),2), ":",
			suffix (concat ("0", binary-to-ascii (16, 8, "", substring(hardware,6,1))),2)
			);
	#log(concat("Release: IP: ", ClientIP));
	execute("/usr/local/bin/dhcp-dyndns.sh", "delete", ClientIP, ClientDHCID);
}

on expiry {
	set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
	# cannot get a ClientMac here, apparently this only works when actually receiving a packet
	#log(concat("Expired: IP: ", ClientIP));
	# cannot get a ClientName here, for some reason that always fails
	# however the dhcp update script will obtain the short hostname.
	execute("/usr/local/bin/dhcp-dyndns.sh", "delete", ClientIP, "", "0");
}