DHCP Server: DNSMASQ

/etc/dnsmasq.conf

dhcp-option=123,48:60:49:08:1C:48:21:E6:59:4B:13:C0:00:21:B3:01
dhcp-option=99,01:41:54:01:06:53:61:6d:70:6c:65:02:06:53:61:6d:70:6c:65:12:0c:53:61:6d:70:6c:65:73:74:72:65:65:74:13:01:31:1b:02:31:30:20:03:31:32:33

Calculation of the geodetic location information (option 123) can be performed with http://www.enum.at/rfc3825encoder.529.0.html

Calculation of the civic address location information (option 99) can be performed with http://ecrit.labs.nic.at/rfc4776.php