Packet #439568

Database ID:	439568
Mesh Packet ID:	`0xcb29861b` Utilizado para correlação entre gateways
Tempo:	2025-10-19 19:29:22 UTC
Do Node:	cinza07D-8 (cz7D)
Para o Node:	CZ0 Cangas Del Narcea (CZ0)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	Cabanelas-CL-8 (CAB1)
Canal:	LongFast
RSSI:	-139 dBm
SNR:	-16.0 dBm
Info Hop:	1/4 hops Início: 4, Limite: 3

Long Name:	cinza07D-8
Short Name:	cz7D
Node ID:	!9ea1cbac
MAC Address:	nBOeocus
Hardware:	HELTEC_V3

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:	77 bytes
Gateway:	!4a30061c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 4

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 1 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!4a30061c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (77 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2661403564` Source node ID	uint32
`to`	`2661091632` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`77` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-139.0` dBm Signal strength at gateway	int32
`rx_snr`	`-16.00` dB Signal quality at gateway	float
`rx_time`	`1760898562` 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`	`248` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760898562.7192318` 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

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!4a30061c`
Signal Metrics:	RSSI: -139.0 dBm SNR: -16.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	77 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!9ea1cbac", "long_name": "cinza07D-8", "short_name": "cz7D", "macaddr": "nBOeocus", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!4a30061c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2661403564, "to": 2661091632, "id": 3408496155, "rx_time": 1760898562, "rx_snr": -16.0, "rx_rssi": -139, "hop_limit": 3, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 248, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213965613163626163120a63696e7a613037442d381a04637a374422069c139ea1cbac282b380142201e4381bca0aad8afb64817407d886a468caed4d1ae2d04cf0629b631e25dbd234800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!9ea1cbac", "long_name": "cinza07D-8", "short_name": "cz7D", "macaddr": "nBOeocus", "hw_model": "HELTEC_V3", "role": "CLIENT_MUTE", "public_key": "HkOBvKCq2K+2SBdAfYhqRoyu1NGuLQTPBim2MeJdvSM=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (77 bytes)

0a09213965613163626163120a63696e7a613037442d381a04637a374422069c139ea1cbac282b380142201e4381bca0aad8afb64817407d886a468caed4d1ae2d04cf0629b631e25dbd234800

Hex Analysis:

Size:	77 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 #439568 Successo

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