BrightSign HD2000 Object Reference Manual - Manual (Page 58)

roDatagramSender, roDatagramReceiver (HD2000 only)
The roDatagramSender and roDatagramReceiver classes allow for simple sending and receiving
of unicast and broadcast UDP packets.
roDatagramSender
allows UDP packets to be sent to a specified destination. It implements
ifDatagramSender .
roDatagramSender
is created with no parameters:
 CreateObject("roDatagramSender ")
The ifDatagramSender interface provides:
 rotBOOL SetDestination(rotSTRING destination_address, rotINT32
destination_port)
o Specify the destination IP address in dotted quad form along with the destination port. Returns
true on success.
 rotINT32 Send(rotSTRING packet)
o Send the specified data packet as a datagram. Returns zero on success or a negative error
number on failure.
roDatagramReceiver
causes events to be sent to a message port when UDP packets are received on
the specified port. It implements ifIdentity and ifSetMessagePort.
roDatagramReceiver
is created with a single parameter:
 CreateObject("roDatagramReceiver ", rotINT32 port)
o Specify the port on which to receive UDP packets.
Examples:
‘ This script broadcasts a single UDP packet containing “HELLO” to
‘ anyone on the network listening on port 21075.
sender = CreateObject(“roDatagramSender”)
sender.SetDestination(“255.255.255.255”, 21075)
sender.Send(“Hello”)
‘ This script listens for UDP packets on port 21075
receiver = CreateObject(“roDatagramReceiver”, 21075)
mp = CreateObject(“roMessagePort”)
receiver.SetPort(mp)
while true
event = mp.WaitMessage(0)
if type(event) = “roDatagramEvent” then
print “Datagram: “; event
endif
end while
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