Packet #9644

Database ID:	9644
Mesh Packet ID:	`0x98b270f7` Utilizado para correlação entre gateways
Tempo:	2025-09-25 10:28:50 UTC
Do Node:	SoRF (2190)
Para o Node:	Tunes-GW8🇵🇹 (NAW8)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	GXP-fa84-CL-8 (fa84)
Canal:	LongFast
RSSI:	-108 dBm
SNR:	-13.0 dBm
Info Hop:	0/1 hops Início: 1, Limite: 1

Long Name:	FMC - Heltec v2
Short Name:	FMC2
Node ID:	!6c982190
MAC Address:	oN1smCGQ
Hardware:	HELTEC_V2_1

Raw Packet Analysis

Complete field breakdown and MQTT privacy/exposure analysis

Packet Structure

MQTT Packet Flow:
ServiceEnvelope (MQTT layer) → MeshPacket (Mesh layer) → Decoded Payload (Application data)

Total Size:	78 bytes
Gateway:	!b03dfa84
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 1

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!b03dfa84` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (78 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1821909392` Source node ID	uint32
`to`	`135354672` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`78` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`1` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-108.0` dBm Signal strength at gateway	int32
`rx_snr`	`-13.00` dB Signal quality at gateway	float
`rx_time`	`1758792508` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	Not set	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1758792530.3233864` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Direct Message

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b03dfa84`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -108.0 dBm SNR: -13.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	78 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!6c982190", "long_name": "FMC - Heltec v2", "short_name": "FMC2", "macaddr": "oN1smCGQ", "hw_model": "HELTEC_V2_1" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b03dfa84", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1821909392, "to": 135354672, "id": 2561831159, "rx_time": 1758792508, "rx_snr": -13.0, "rx_rssi": -108, "hop_limit": 1, "hop_start": 1, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 0, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213663393832313930120f464d43202d2048656c7465632076321a04464d43322206a0dd6c982190280a42200dd2a82c0b4ae73688265dcd17d8943eff5fd4dbcdfe23203900e8845986ed37", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!6c982190", "long_name": "FMC - Heltec v2", "short_name": "FMC2", "macaddr": "oN1smCGQ", "hw_model": "HELTEC_V2_1", "public_key": "DdKoLAtK5zaIJl3NF9iUPv9f1NvN/iMgOQDohFmG7Tc=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (78 bytes)

0a09213663393832313930120f464d43202d2048656c7465632076321a04464d43322206a0dd6c982190280a42200dd2a82c0b4ae73688265dcd17d8943eff5fd4dbcdfe23203900e8845986ed37

Hex Analysis:

Size:	78 bytes
Format:	Protobuf (Protocol Buffers)
Encoding:	Binary with varint and length-delimited fields

This is the raw protobuf-encoded payload as received from MQTT. The structure follows the Meshtastic protobuf schema definitions.

Pacote #9644 Successo

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