DPAUXMON(1)

💅 DPAUXMON — the dpauxmon manual, but make it make sense

okay so bestie, welcome to dpauxmon(1) — yes that's the manual section number, yes it's giving very "I read man pages for fun" and honestly? iconic. this whole thing lives in the Wireshark family and it's here to snag DisplayPort AUX channel data for you. let's go 🎀

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✨ NAME ✨

dpauxmon — provides interfaces to capture DisplayPort AUX channel data. that's it, that's the whole job, and it does it beautifully 🫶

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🌸 SYNOPSIS 🌸

dpauxmon [ --help ] [ --version ] [ --extcap-interfaces ]
[ --extcap-dlts ] [ --extcap-interface=<interface> ] [ --extcap-config ]
[ --extcap-capture-filter=<capture filter> ] [ --capture ]
[ --fifo=<path to file or pipe> ]
[ --interface_id=<Interface ID to capture> ]

dpauxmon --extcap-interfaces

dpauxmon --extcap-interface=<interface> --extcap-dlts

dpauxmon --extcap-interface=<interface> --extcap-config

dpauxmon --extcap-interface=<interface> --fifo=<path to file or pipe>
--capture --interface_id=interface_id

like, those are the shapes it comes in. pick your fighter bestie 💅

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🦋 DESCRIPTION 🦋

so dpauxmon is an extcap tool — meaning it slots right into Wireshark's whole ecosystem like it owns the place — and it captures DisplayPort AUX channel data from linux kernel drivers using the generic netlink interface. no cap, that's the whole pipeline and it's lowkey gorgeous ✨

Supported interfaces (there's exactly one, she's an only child and she's thriving):

1. dpauxmon

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👑 OPTIONS 👑

okay the menu. every single one. no skips, no cuts 🔥

• --help — prints the program arguments so you can see what's up.
• --version — prints the program version. drop the digits bestie 💜
• --extcap-interfaces — lists the available interfaces.
• --extcap-interface=<interface> — uses the interfaces you specified.
• --extcap-dlts — lists the DLTs of the specified interface.
• --extcap-config — lists the configuration options of the specified interface.
• --capture — starts capturing from the specified interface and saves it in the place specified by --fifo.
• --fifo=<path to file or pipe> — saves the captured packet to a file, or sends it through a pipe. your data, your destination 🧚
• --interface_idt=<interface id> — the interface for capture. (yes this one's spelled --interface_idt here — that's genuinely what the page says, don't come for me 🙈)

heads up bestie: the synopsis spells it --interface_id=<Interface ID to capture> and the examples use --interface_id too, while this option list says --interface_idt. both spellings live in this page, so keep your eyes peeled and match what your build actually accepts 👀

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🌈 EXAMPLES 🌈

wanna see the program arguments? say less:

dpauxmon --help

program version era:

dpauxmon --version

see the interfaces:

dpauxmon --extcap-interfaces

only one interface (dpauxmon) is supported. she's solo and she's slaying.

Example output:

interface {value=dpauxmon}{display=DisplayPort AUX channel capture}

see the interface DLTs:

dpauxmon --extcap-interface=dpauxmon --extcap-dlts

Example output:

dlt {number=275}{name=dpauxmon}{display=DisplayPort AUX channel monitor DLT}

see the interface configuration options:

dpauxmon --extcap-interface=dpauxmon --extcap-config

Example output:

dpauxmon --extcap-interface=dpauxmon --extcap-config
arg {number=0}{call=--interface_id}{display=Interface Id}
    {type=unsigned}{tooltip=The Interface Id}
    {required=true}

and now the main event, the actual capture:

dpauxmon --extcap-interface=dpauxmon --fifo=/tmp/dpauxmon.pcap --capture --interface_id 0

that's the moment. that's the whole vibe. 0 is the interface id, /tmp/dpauxmon.pcap is where the pcap lands, periodt 💅

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🔍 SEE ALSO 🔍

wireshark(1), tshark(1), dumpcap(1), extcap(4)

go read those too, they're the friend group 🫶

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📌 NOTES 📌

dpauxmon is part of the Wireshark distribution. the latest version of Wireshark can be found at https://www.wireshark.org — go be nosy, it's free ✨

HTML versions of the Wireshark project man pages are available at https://www.wireshark.org/docs/man-pages — yes, HTML, so you can read them in a browser like a civilized main character 🌸

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💖 AUTHORS 💖

Original Author Dirk Eibach <dirk.eibach[AT]gdsys.cc>

look at that email format, [AT] anti-spam realness, we love a careful king 👑

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and that's the whole page bestie!! source/version and date tea: this manual was dated 2026-10-08 and it's the DPAUXMON(1) page, so now you know exactly what you're reading and when it was stamped 🎀✨ go capture some AUX channel data, you've got this, fr fr 💜