Match the C++ firmware wire format (Packet::writeTo/readFrom):
1. Field order: transport codes are parsed BEFORE path_length byte,
matching firmware's header → transport_codes → path_len → path → payload
2. ACK payload: just 4-byte CRC checksum, not dest+src+ackHash.
Firmware createAck() writes only ack_crc (4 bytes).
3. TRACE payload: tag(4) + authCode(4) + flags(1) + pathData,
matching firmware createTrace() and onRecvPacket() TRACE handler.
4. ADVERT features: parse feat1 (0x20) and feat2 (0x40) optional
2-byte fields between location and name, matching AdvertDataBuilder
and AdvertDataParser in the firmware.
5. Transport code naming: code1/code2 instead of nextHop/lastHop,
matching firmware's transport_codes[0]/transport_codes[1] naming.
Fixes applied to both cmd/ingestor/decoder.go and cmd/server/decoder.go.
Tests updated to match new behavior.
Sensor nodes embed telemetry (battery_mv, temperature_c) in their advert
appdata after the null-terminated name. This commit adds decoding and
storage for both the Go ingestor and Node.js backend.
Changes:
- decoder.go/decoder.js: Parse telemetry bytes from advert appdata
(battery_mv as uint16 LE millivolts, temperature_c as int16 LE /100)
- db.go/db.js: Add battery_mv INTEGER and temperature_c REAL columns
to nodes and inactive_nodes tables, with migration for existing DBs
- main.go/server.js: Update node telemetry on advert processing
- server db.go: Include battery_mv/temperature_c in node API responses
- Tests: Decoder telemetry tests (positive, negative temp, no telemetry),
DB migration test, node telemetry update test, server API shape tests
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
The #197 decryption fix added channelKeys parameter to decodePayload and
DecodePacket, but the test call sites were malformed:
- DecodePacket(hex, nil + stringExpr) → nil concatenated with string (type error)
- decodePayload(type, make([]byte, N, nil)) → nil used as make capacity (type error)
Fixed to:
- DecodePacket(hex + stringExpr, nil) → string concat then nil channelKeys
- decodePayload(type, make([]byte, N), nil) → proper 3-arg call
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
After decryption produces text, validate it's printable UTF-8.
If it contains more than 2 non-printable characters (excluding
newline/tab), mark as decryption_failed with text: null.
Applied to both Node (decoder.js) and Go (cmd/ingestor/decoder.go)
decoders. Added tests for garbage and valid text in both.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Go ingestor never had channel decryption — GRP_TXT packets were stored
with raw encrypted data while Node.js decoded them successfully.
Changes:
- decoder.go: Add decryptChannelMessage() implementing MeshCore channel
crypto (HMAC-SHA256 MAC verification + AES-128-ECB decryption), matching
the algorithm in @michaelhart/meshcore-decoder. Update decodeGrpTxt(),
decodePayload(), and DecodePacket() to accept and pass channel keys.
Add Payload fields: ChannelHashHex, DecryptionStatus, Channel, Text,
Sender, SenderTimestamp.
- config.go: Add ChannelKeysPath and ChannelKeys fields to Config struct.
- main.go: Add loadChannelKeys() that loads channel-rainbow.json (same
file used by Node.js server) from beside the config file, with env var
and config overrides. Pass loaded keys through the decoder pipeline.
- decoder_test.go: Add 14 channel decryption tests covering valid
decryption, MAC failure, wrong key, no-sender messages, bracket
sender exclusion, key iteration, channelHashHex formatting, and
decryption status states. Cross-validated against Node.js output.
- Update all DecodePacket/decodePayload/decodeGrpTxt/handleMessage call
sites in test files to pass the new channelKeys parameter.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
First step of Go rewrite — separates MQTT ingestion from the Node.js
web server. Single static binary (no CGO) that connects to MQTT
brokers, decodes MeshCore packets, and writes to the shared SQLite DB.
Ported from JS:
- decoder.js → decoder.go (header, path, all payload types, adverts)
- computeContentHash → Go (SHA-256, path-independent)
- db.js v3 schema → db.go (transmissions, observations, nodes, observers)
- server.js MQTT logic → main.go (multi-broker, reconnect, IATA filter)
25 Go tests passing (golden fixtures from production + schema compat).
No existing JS files modified.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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