( NTP JCB 09:54 11/17/10)
: ntp-server
\ h# 02830a00.
\ ip# 91.189.94.4 \ time.ubuntu
ip# 17.151.16.20 \ time.apple.com
;
: ntp-request
d# 123 d# 9999
ntp-server
net-my-ip
2over arp-lookup
( dst-port src-port dst-ip src-ip *ethaddr )
udp-header
h# 2304 mac-pkt-, h# 04ec mac-pkt-,
d# 6 mac-pkt-,0
d# 4 mac-pkt-,0 \ originate
d# 4 mac-pkt-,0 \ reference
d# 4 mac-pkt-,0 \ receive
\ d# 4 mac-pkt-,0 \ transmit
time@ mac-pkt-d, d# 2 mac-pkt-,0
udp-wrapup mac-send
;
: ntp-handler
IP_PROTO_UDP ip-isproto
ETH.IP.UDP.SOURCEPORT packet@ d# 123 = and
ETH.IP.UDP.DESTPORT packet@ d# 9999 = and
if
ETH.IP.UDP.NTP.TRANSMIT packetd@ setdate
time@ ETH.IP.UDP.NTP.ORIGINATE packetd@ d- setdelay
then
;