Packet #350660

Database ID:	350660
Mesh Packet ID:	`0x2e0a56f8` Utilizado para correlação entre gateways
Tempo:	2025-10-14 19:54:47 UTC
Do Node:	Marateca-GW-8 (teca)
Para o Node:	Meshtastic ffb0-8 (ffb0)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	hdlopesrocha-8 (HLR8)
Canal:	LongFast
RSSI:	-14 dBm
SNR:	5.75 dBm
Info Hop:	0/4 hops Início: 4, Limite: 4

Long Name:	Meshtastic 98c4
Short Name:	98c4
Node ID:	!08ac98c4
MAC Address:	ZLcIrJjE
Hardware:	TLORA_V2_1_1P6

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:	!a8e5a2f3
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 4

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`	`!a8e5a2f3` 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`	`145529028` Source node ID	uint32
`to`	`3126984624` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-14.0` dBm Signal strength at gateway	int32
`rx_snr`	`5.75` dB Signal quality at gateway	float
`rx_time`	`1760468086` 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`	`196` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760468087.3759189` 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:	`!a8e5a2f3`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -14.0 dBm SNR: 5.75 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": "!08ac98c4", "long_name": "Meshtastic 98c4", "short_name": "98c4", "macaddr": "ZLcIrJjE", "hw_model": "TLORA_V2_1_1P6" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!a8e5a2f3", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 145529028, "to": 3126984624, "id": 772429560, "rx_time": 1760468086, "rx_snr": 5.75, "rx_rssi": -14, "hop_limit": 4, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 196, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213038616339386334120f4d65736874617374696320393863341a0439386334220664b708ac98c4280342200501d011bf7353d275dc84b197a6aa5c479d18199a28441bc582f2475ba130564800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!08ac98c4", "long_name": "Meshtastic 98c4", "short_name": "98c4", "macaddr": "ZLcIrJjE", "hw_model": "TLORA_V2_1_1P6", "public_key": "BQHQEb9zU9J13ISxl6aqXEedGBmaKEQbxYLyR1uhMFY=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09213038616339386334120f4d65736874617374696320393863341a0439386334220664b708ac98c4280342200501d011bf7353d275dc84b197a6aa5c479d18199a28441bc582f2475ba130564800

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 #350660 Successo

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