Packet #495269

Database ID:	495269
Mesh Packet ID:	`0xc619187f` Utilizado para correlação entre gateways
Tempo:	2025-10-23 00:40:58 UTC
Do Node:	Purex-CL-8 (PURX)
Para o Node:	CS7ATL-TIRES-GT-8 🇵🇹 (GT01)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	NPatroni-GW-8 (aba4)
Canal:	LongFast
RSSI:	-102 dBm
SNR:	-1.0 dBm
Info Hop:	3/3 hops Início: 3, Limite: 0

Long Name:	Purex-CL-8
Short Name:	PURX
Node ID:	!100663b0
MAC Address:	7AEQBmOw
Hardware:	XIAO_NRF52_KIT

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:	73 bytes
Gateway:	!433daba4
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 3

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`	`!433daba4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (73 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`268854192` Source node ID	uint32
`to`	`2120513204` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`73` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-102.0` dBm Signal strength at gateway	int32
`rx_snr`	`-1.00` dB Signal quality at gateway	float
`rx_time`	`1761176457` 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`	`135` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761176458.941702` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!433daba4`
Signal Metrics:	RSSI: -102.0 dBm SNR: -1.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	73 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!100663b0", "long_name": "Purex-CL-8", "short_name": "PURX", "macaddr": "7AEQBmOw", "hw_model": "XIAO_NRF52_KIT" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433daba4", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 268854192, "to": 2120513204, "id": 3323533439, "rx_time": 1761176457, "rx_snr": -1.0, "rx_rssi": -102, "hop_limit": 0, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 135, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213130303636336230120a50757265782d434c2d381a04505552582206ec01100663b0285842200551c9b6bb3fdb0ff05248ca91c0e22ed9ca0068df84074c0eedc3bfc2c6d007", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!100663b0", "long_name": "Purex-CL-8", "short_name": "PURX", "macaddr": "7AEQBmOw", "hw_model": "XIAO_NRF52_KIT", "public_key": "BVHJtrs/2w/wUkjKkcDiLtnKAGjfhAdMDu3Dv8LG0Ac=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (73 bytes)

0a09213130303636336230120a50757265782d434c2d381a04505552582206ec01100663b0285842200551c9b6bb3fdb0ff05248ca91c0e22ed9ca0068df84074c0eedc3bfc2c6d007

Hex Analysis:

Size:	73 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 #495269 Successo

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