Packet #500253

Database ID:	500253
Mesh Packet ID:	`0xa94eb78a` Utilizado para correlação entre gateways
Tempo:	2025-10-23 07:41:57 UTC
Do Node:	TNLD-8 (TNLD)
Para o Node:	!00000001 (0001)
Successo:	Processado
Protocolo:	NEIGHBORINFO_APP Port: 71

Gateway:	TNLD-8 (TNLD)
Canal:	LongFast
RSSI:	Unknown
SNR:	Unknown
Info Hop:	0/5 hops Início: 5, Limite: 5

Node que reporta:	TNLD-8 (TNLD)
Enviado pela última vez em:	TNLD-8 (TNLD)
Intervalo de Broadcast:	3600 seconds
Vizinhos Encontrados:	0

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:	15 bytes
Gateway:	!849b7cdc
Channel:	LongFast
Payload Type:	NEIGHBORINFO_APP
Hop Count:	Unknown / 5

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

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!849b7cdc` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (15 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2224782556` Source node ID	uint32
`to`	`1` Target node ID	uint32
`decoded.portnum`	`71` NEIGHBORINFO_APP	enum
`decoded.payload_length`	`15` bytes	size
`hop_limit`	`5` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1761201717` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`10` Packet priority level	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`220` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761201717.6884913` 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

MQTT-Specific Fields

Gateway ID:	`!849b7cdc`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NEIGHBORINFO_APP
Size:	15 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "node_id": 2224782556, "last_sent_by_id": 2224782556, "node_broadcast_interval_secs": 3600, "neighbors": [], "neighbor_count": 0, "node_name": "TNLD-8 (TNLD)", "last_sent_by_name": "TNLD-8 (TNLD)" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!849b7cdc", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2224782556, "to": 1, "id": 2840508298, "rx_time": 1761201717, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 5, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 10, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 220, "tx_after": 0, "decoded": { "portnum": 71, "payload": "08dcf9eda40810dcf9eda40818901c", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "node_id": 2224782556, "last_sent_by_id": 2224782556, "node_broadcast_interval_secs": 3600, "type": "protobuf", "portnum": "NEIGHBORINFO_APP", "message_class": "NeighborInfo" } } } }

Raw Packet Data (15 bytes)

08dcf9eda40810dcf9eda40818901c

Hex Analysis:

Size:	15 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 #500253 Successo

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