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= udpdump(1)
:doctype: manpage
include::../docbook/attributes.adoc[]
:stylesheet: ws.css
:linkcss:
:copycss: ../docbook/{stylesheet}
== NAME
udpdump - Provide an UDP receiver that gets packets from network devices (like Aruba routers) and exports them in PCAP format.
== SYNOPSIS
[manarg]
*udpdump*
[ *--help* ]
[ *--version* ]
[ *--extcap-interfaces* ]
[ *--extcap-dlts* ]
[ *--extcap-interface*=<interface> ]
[ *--extcap-config* ]
[ *--capture* ]
[ *--fifo*=<path to file or pipe> ]
[ *--port*=<port> ]
[ *--payload*=<type> ]
== DESCRIPTION
*udpdump* is a extcap tool that provides an 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
== OPTIONS
--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.
--
== EXAMPLES
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 application.
== SEE ALSO
xref:wireshark.html[wireshark](1), xref:tshark.html[tshark](1), xref:dumpcap.html[dumpcap](1), xref:extcap.html[extcap](4)
== NOTES
*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.
== AUTHORS
.Original Author
[%hardbreaks]
Dario Lombardo <lomato[AT]gmail.com>
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