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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | NOTES | AUTHORS |
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UDPDUMP(1) UDPDUMP(1)
udpdump - Provide a UDP receiver that gets packets from network
devices (like Aruba routers) and exports them in PCAP format.
udpdump [ --help ] [ --version ] [ --extcap-interfaces ] [
--extcap-dlts ] [ --extcap-interface=<interface> ] [
--extcap-config ] [ --capture ] [ --fifo=<path to file or pipe> ]
[ --port=<port> ] [ --payload=<type> ]
udpdump is a extcap tool that provides a UDP receiver that listens
for exported datagrams coming from any source (like Aruba routers)
and exports them in PCAP format. This provides the user two basic
functionalities: the first one is to have a listener that prevents
the localhost to send back an ICMP port-unreachable packet. The
second one is to strip out the lower layers (layer 2, IP, UDP)
that are useless (are used just as export vector). The format of
the exported datagrams are EXPORTED_PDU, as specified in
https://gitlab.com/wireshark/wireshark/-/raw/master/epan/exported_pdu.h
--help
Print program arguments.
--version
Print program version.
--extcap-interfaces
List available interfaces.
--extcap-interface=<interface>
Use specified interfaces.
--extcap-dlts
List DLTs of specified interface.
--extcap-config
List configuration options of specified interface.
--capture
Start capturing from specified interface save saved it in
place specified by --fifo.
--fifo=<path to file or pipe>
Save captured packet to file or send it through pipe.
--port=<port>
Set the listener port. Port 5555 is the default.
--payload=<type>
Set the payload of the exported PDU. Default: data.
To see program arguments:
udpdump --help
To see program version:
udpdump --version
To see interfaces:
udpdump --extcap-interfaces
Example output
interface {value=udpdump}{display=UDP Listener remote capture}
To see interface DLTs:
udpdump --extcap-interface=udpdump --extcap-dlts
Example output
dlt {number=252}{name=udpdump}{display=Exported PDUs}
To see interface configuration options:
udpdump --extcap-interface=udpdump --extcap-config
Example output
arg {number=0}{call=--port}{display=Listen port}{type=unsigned}{range=1,65535}{default=5555}{tooltip=The port the receiver listens on}
To capture:
udpdump --extcap-interface=randpkt --fifo=/tmp/randpkt.pcapng --capture
Note
To stop capturing CTRL+C/kill/terminate the application.
wireshark(1), tshark(1), dumpcap(1), extcap(4)
udpdump is part of the Wireshark distribution. The latest version
of Wireshark can be found at https://www.wireshark.org.
HTML versions of the Wireshark project man pages are available at
https://www.wireshark.org/docs/man-pages.
Original Author
Dario Lombardo <lomato[AT]gmail.com>.SH COLOPHON This page is part
of the wireshark (Interactively dump and analyze network traffic)
project. Information about the project can be found at
⟨https://www.wireshark.org/⟩. If you have a bug report for this
manual page, see
⟨https://gitlab.com/wireshark/wireshark/-/issues⟩. This page was
obtained from the project's upstream Git repository
⟨https://gitlab.com/wireshark/wireshark.git⟩ on 2025-08-11. (At
that time, the date of the most recent commit that was found in
the repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
2025-03-07 UDPDUMP(1)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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