Files
video-setup/docs/cli/discovery_cli.md
mikael-lovqvists-claude-agent 44090c1d6d docs: write CLI docs for all 12 previously undocumented tools
Add docs/cli/ entries for:
  transport_cli, discovery_cli, config_cli, protocol_cli, query_cli,
  test_image_cli, xorg_cli, v4l2_view_cli, stream_send_cli,
  stream_recv_cli, reconciler_cli, controller_cli

Each doc covers: description, build instructions, full usage with all
options and defaults, example output, and a relationship note pointing
to related tools. controller_cli includes the display control IDs table
and notes its temporary status.

README.md: convert all CLI tool entries to links.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-30 00:45:27 +00:00

1.4 KiB

discovery_cli

A development tool for testing the UDP multicast discovery layer. Announces a node on the local network and prints peers as they appear and disappear.


Build

From the repository root:

make cli

The binary is placed in build/cli/.


Usage

discovery_cli <name> <tcp_port> [flags]
Argument Description
name Node name in namespace:instance form, e.g. v4l2:microscope
tcp_port The TCP port this node listens on for transport connections
flags Comma-separated role list: source, relay, sink, controller (default: source)

Example — announce a source node and watch for peers:

./discovery_cli camera:0 8000 source

Example output as peers are found and lost:

found: unnamed:0  192.168.1.42:8001  site=0  flags=source
found: display:0  192.168.1.55:8002  site=0  flags=sink
lost:  unnamed:0  192.168.1.42:8001

Run two instances on the same machine (different ports) to verify mutual discovery.


Relationship to the Video Routing System

discovery_cli exercises the discovery module, which the video node uses to find peers on the LAN without configuration. The node starts a discovery listener on startup; controllers use discovered peer tables to locate nodes before connecting.

See also: query_cli.md for a combined discovery + protocol query.