Why 26 NVRAM parameters?

The protocol-level NVRAM region on a Squeezebox is much larger than the 26 entries go-udap recognises. Why these 26 and not more?

Net::UDAP is the authority

go-udap treats the Perl Net::UDAP reference implementation as the canonical source of truth for the protocol. Net::UDAP defines a constant table listing each NVRAM offset, its length, and its canonical name. go-udap's udap.Parameters slice mirrors that table exactly.

The 26 entries cover everything the protocol officially exposes:

• Network configuration (IP mode, IP, subnet, gateway, DNS, hostname)
• Wireless config (SSID, region, WEP/WPA settings)
• Server pointer (LMS address)
• A few miscellany (bridging, interface select, server display name)

The full table is in reference: NVRAM parameters.

Aliases

A small number of parameters have aliases (e.g. squeezecenter_address and slimserver_address both refer to the same NVRAM offset as lms_address). Aliases are accepted on input (in set --config or --<param> flags) but read always emits the canonical name.

What about parameters NOT in the table?

A Squeezebox's NVRAM has hundreds of bytes go-udap doesn't recognise as "parameters." These show up in go-udap read --all as offset_NNN entries (where NNN is the byte offset). They're shown for completeness but you can't set them — go-udap will refuse unknown parameter names.

If you need to write a custom offset, you'd extend udap.Parameters and rebuild the binary. The cross-platform Squeezeplay UDAP cross-check inventoried squeezeplay's own table and confirmed it's a strict subset of ours, so we're unlikely to be missing anything the reference Lua implementation uses.

Adding a new parameter

If you're working on go-udap itself and want to add a new NVRAM-parameter:

1. Add an entry to udap/parameters.go's Parameters slice
2. Verify the offset against a wire capture from a real device
3. Add it to the NVRAM parameters reference
4. If the parameter has any aliases (other names that point at the same offset), add them to parameterAliases