docs/JAMULUS_PROTOCOL.md: message reference, directory flows, small fixes#3794
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…ixes - Explain how receivers classify datagrams (protocol frame vs audio) and specify the CRC and the acknowledge/retransmit mechanism - Add a complete message-ID reference for connection-based and connectionless messages - Add a section on directory registration, server lists and NAT hole punching (registration refresh/timeout intervals, CLM message flows) - Fix message names to match protocol.h (REQ_CHANNEL_INFOS, CHANNEL_INFOS, REQ_CONN_CLIENTS_LIST) Co-Authored-By: Claude Fable 5 <[email protected]>
ann0see
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July 17, 2026 22:08
pljones
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Jul 18, 2026
| | 34 | `REQ_SPLIT_MESS_SUPPORT` | Request split-message support | | ||
| | 35 | `SPLIT_MESS_SUPPORTED` | Split messages are supported | | ||
| | 36 | `RAWAUDIO_SUPPORTED` | Raw (uncompressed) audio is supported | | ||
| | 2001 | `SPECIAL_SPLIT_MESSAGE` | Container for split messages | |
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Without commentary, this looks peculiar.
2001 is a different type of message from the (other) connection-oriented messages. I'd not put it in the same table.
pljones
reviewed
Jul 18, 2026
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| ## Directory Registration and Server Lists | ||
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| A directory is a Jamulus server acting as a registry (implemented in `src/serverlist.cpp`, both roles). All directory traffic uses connectionless messages: |
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Can you check through and make sure the following adhere to the style guide:
- Client
- Server
- Directory
all always capitalised when referring to Jamulus "running as a...". The style guide covers a few other things.
Probably applies to the other docs as well.
pljones
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Jul 18, 2026
| A directory is a Jamulus server acting as a registry (implemented in `src/serverlist.cpp`, both roles). All directory traffic uses connectionless messages: | ||
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| - A server registers with `CLM_REGISTER_SERVER_EX (1017)` (older versions: `CLM_REGISTER_SERVER (1004)`) and receives `CLM_REGISTER_SERVER_RESP (1016)` carrying the result (registered, list full, version too old, requirements not fulfilled). If no response arrives, registration is retried every 500 ms, up to 5 times. | ||
| - Registration is refreshed every 15 minutes; the directory drops a server it has not heard from for 33 minutes. `CLM_UNREGISTER_SERVER (1005)` removes the entry immediately at shutdown. |
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Suggested change
| - Registration is refreshed every 15 minutes; the directory drops a server it has not heard from for 33 minutes. `CLM_UNREGISTER_SERVER (1005)` removes the entry immediately at shutdown. | |
| - Registration is refreshed every 15 minutes; the directory drops a server it has not heard from for 33 minutes. `CLM_UNREGISTER_SERVER (1005)` removes the entry immediately at shutdown or when changing Directory through the Server UI. |
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One file. Fills the main gaps in the protocol doc, verified against
src/protocol.cpp/src/socket.cpp/src/serverlist.cppon current main:CSocket::ProcessPacket()), the CRC parameters, and how acknowledge/retransmit actually works — previously the doc said only "must be acknowledged".protocol.h.CLM_SEND_EMPTY_MESSAGE/CLM_EMPTY_MESSAGENAT hole-punch flow — previously undocumented here despite being a third of the connectionless messages.protocol.h(REQ_CHANNEL_INFOS,CHANNEL_INFOS,REQ_CONN_CLIENTS_LIST).CHANGELOG: SKIP
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