UDP Probe

Send/receive UDP packets.

Identification and Properties

Probe Type ID: udp


Name Type Default value Description
local_ip string (empty - system assigned) Local IP address to use when sending packets
local_port integer 0 (system assigned) Local port to use when sending packets
listen_on_send boolean True Once something has been sent (from local_ip:local_port), keep listening for a possible response on this address. Only stops listening on unmapping. When set to False, immediately closes the sending socket once the packet has been sent.
listening_ip string Listening IP address, if listening mode is activated (see below)
listening_port integer 0 Set it to a non-zero port to start listening on mapping. May be the same ip/port as local_ip:local_port. In this case, listen_on_send is meaningless.
default_sut_address string (ip:port) None If set, used as a default SUT address if none provided by the user


This probe is a very simple adapter that enables to send and receive UDP packets on the network.

It can work as a listening probe, raising an event/message each time a new UDP packet is received on its listening_ip:listening_port address, or send an UDP packet to either default_sut_address or to an explicit sutAddress if one was provided in the send() port command.

When sending a packet, the UDP source address is set to local_ip:local_port.

Listening and sending modes can work in parallel on the same probe.


All platforms.



See Also

Other transport-oriented probes:

TTCN-3 Types Equivalence

The test system interface port bound to such a probe complies with the TransportProbePortType port type as specified below:

type TransportProbePortType
  in, out octetstring;