Packet #434251

Database ID:	434251
Mesh Packet ID:	`0x4bc85c5c` Utilizado para correlação entre gateways
Tempo:	2025-10-19 13:59:30 UTC
Do Node:	IberianTracks-8 (IBRN)
Para o Node:	NYNOR_8704_CL-868 (NYNR)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	IberianTracks-8 (IBRN)
Canal:	LongFast
RSSI:	Unknown
SNR:	Unknown
Info Hop:	0/4 hops Início: 4, Limite: 4

Long Name:	IberianTracks-8
Short Name:	IBRN
Node ID:	!a0ccd76c
MAC Address:	MO2gzNds
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:	82 bytes
Gateway:	!a0ccd76c
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

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!a0ccd76c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (82 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2697779052` Source node ID	uint32
`to`	`1130006276` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`82` 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`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1760878769` 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`	`108` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760878770.2967997` 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:	`!a0ccd76c`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	82 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!a0ccd76c", "long_name": "IberianTracks-8", "short_name": "IBRN", "macaddr": "MO2gzNds", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!a0ccd76c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2697779052, "to": 1130006276, "id": 1271422044, "rx_time": 1760878769, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 4, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 10, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 108, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216130636364373663120f4962657269616e547261636b732d381a044942524e220630eda0ccd76c282b38014220bdd0c345769fbeb98f8965f901e6718a626759eaadd83738972d501cc8d1ce524800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!a0ccd76c", "long_name": "IberianTracks-8", "short_name": "IBRN", "macaddr": "MO2gzNds", "hw_model": "HELTEC_V3", "role": "CLIENT_MUTE", "public_key": "vdDDRXafvrmPiWX5AeZximJnWeqt2Dc4ly1QHMjRzlI=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (82 bytes)

0a09216130636364373663120f4962657269616e547261636b732d381a044942524e220630eda0ccd76c282b38014220bdd0c345769fbeb98f8965f901e6718a626759eaadd83738972d501cc8d1ce524800

Hex Analysis:

Size:	82 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 #434251 Successo

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