`rhp mon`¶

Open a TRACE-mode socket on a radio port and continuously dump every frame the radio hears, with decoded headers. The packet-radio "monitor" view from classic terminals.

Usage¶

rhp mon --radio <port> [--pfam ax25|netrom]
        [--no-incoming] [--no-outgoing] [--no-supervisory]
        [--hex]
        [--host H] [--port P] [--user U --pass P]

Flags¶

Flag	Default	Effect
`--no-incoming`	off	Don't subscribe to inbound frames.
`--no-outgoing`	off	Don't subscribe to outbound frames.
`--no-supervisory`	off	Drop AX.25 S-frames (RR/RNR/REJ/SREJ).
`--hex`	off	Dump payload as hex; default is printable ASCII.

Output format¶

Each frame is printed as one line plus an optional payload block:

HH:MM:SS  DIR  SRC      ->DST       TYPE C/R P/F  payload
21:18:42  RX   M0XYZ    ->G8PZT     I    C   F    hello\r
21:18:43  TX   G8PZT    ->M0XYZ     RR   R   F
21:18:44  RX   M0XYZ    ->G8PZT-1   UI   C   P    NETROM beacon

DIR is RX/TX/??.
TYPE is the AX.25 frame type (I, RR, UI, SABM, …).
C/R is the C/R bit.
P/F is the poll/final bit.
In --hex mode the payload is rendered as a 16-byte-wide hex table.

Examples¶

Watch radio port 1, all trafficHex dump of incoming frames onlyFilter to NetRom on port 2

rhp mon --radio 1

rhp mon --radio 1 --no-outgoing --hex

rhp mon --pfam netrom --radio 2 --no-supervisory

Tips¶

Combine with tee for capture: rhp mon --radio 1 | tee port1-$(date +%F).log.
--no-supervisory is hugely useful when a busy link is drowning in RR/RNR; you'll only see information frames and management frames.
If you see nothing arriving, check that the remote side is talking on the right physical radio port id (the XRouter PORT N=… line).

rhp mon¶