Packet #475021

Database ID:	475021
Mesh Packet ID:	`0x99a9c1cd` Utilizado para correlação entre gateways
Tempo:	2025-10-21 23:48:03 UTC
Do Node:	micas147-8 (m147)
Para o Node:	!06f5d224 (d224)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	MosEisleyCantina-GW-8🇵🇹 (SOLO)
Canal:	LongFast
RSSI:	-115 dBm
SNR:	-13.25 dBm
Info Hop:	1/4 hops Início: 4, Limite: 3

Long Name:	Meshtastic 7604
Short Name:	7604
Node ID:	!ba6a7604
MAC Address:	ECC6anYE
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:	80 bytes
Gateway:	!da585d78
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`	`!da585d78` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3127539204` Source node ID	uint32
`to`	`116773412` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` 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`	`-115.0` dBm Signal strength at gateway	int32
`rx_snr`	`-13.25` dB Signal quality at gateway	float
`rx_time`	`1761086883` 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`	`173` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761086883.9983733` 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:	`!da585d78`
Signal Metrics:	RSSI: -115.0 dBm SNR: -13.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	80 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ba6a7604", "long_name": "Meshtastic 7604", "short_name": "7604", "macaddr": "ECC6anYE", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!da585d78", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3127539204, "to": 116773412, "id": 2578039245, "rx_time": 1761086883, "rx_snr": -13.25, "rx_rssi": -115, "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": 173, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216261366137363034120f4d65736874617374696320373630341a043736303422061020ba6a7604282b42206bc426236f4d534c5b09d0f44459467572e15d282c29a30233ba766516cfce614800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ba6a7604", "long_name": "Meshtastic 7604", "short_name": "7604", "macaddr": "ECC6anYE", "hw_model": "HELTEC_V3", "public_key": "a8QmI29NU0xbCdD0RFlGdXLhXSgsKaMCM7p2ZRbPzmE=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09216261366137363034120f4d65736874617374696320373630341a043736303422061020ba6a7604282b42206bc426236f4d534c5b09d0f44459467572e15d282c29a30233ba766516cfce614800

Hex Analysis:

Size:	80 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 #475021 Successo

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