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UDP Multicast Open (UDP Multicast Open (Write-Only)) (G Dataflow)

Last Modified: March 10, 2017

Opens a UDP multicast socket with write-only access on the port you specify.

Programming Patterns
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net address

Network address to listen on. Specifying an address is useful if you have more than one network card, such as two Ethernet cards, and want to listen only on the card with the specified address. If you do not specify a network address, this node listens on all network addresses. Use the String to IP Address node to obtain the IP network address of the current computer.

This input supports scalar strings and unsigned 32-bit integers.

Default: 0

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port

The local port with which you want to create a UDP socket.

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time-to-live

Number of routers, minus 1, to forward a datagram. The time-to-live (TTL) value applies to all datagrams sent using this socket. The following table lists what action occurs to a multicast datagram when you specify a value for the TTL parameter.

0 The datagram remains on the host computer.
1 LabVIEW sends the datagram to every client on the same local subnet that subscribes to that IP address. Hubs/repeaters and bridges/switches forward the datagram. Routers do not forward the datagram if the TTL is 1.
>1 LabVIEW sends the datagram and routers forward it through TTL-1 layers.

Default: 1

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error in

Error conditions that occur before this node runs. The node responds to this input according to standard error behavior.

Default: No error

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connection ID

A network connection refnum that uniquely identifies the connection. Use this value to refer to this connection in subsequent node calls.

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error out

Error information. The node produces this output according to standard error behavior.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


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