Packet #397068

Database ID:	397068
Mesh Packet ID:	`0x80630d93` Utilizado para correlação entre gateways
Tempo:	2025-10-17 15:30:29 UTC
Do Node:	CT7ALW-CL-8 (7ALW)
Para o Node:	cardinal-sense-cl-8 (ca2)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	CT7ALW-CL-8 (7ALW)
Canal:	LongFast
RSSI:	Unknown
SNR:	Unknown
Info Hop:	0/4 hops Início: 4, Limite: 4

Long Name:	CT7ALW-CL-8
Short Name:	7ALW
Node ID:	!ba69c004
MAC Address:	ECC6acAE
Hardware:	HELTEC_WIRELESS_TRACKER

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:	76 bytes
Gateway:	!ba69c004
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`	`!ba69c004` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (76 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3127492612` Source node ID	uint32
`to`	`1660437776` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`76` 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`	`1760711430` 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`	`4` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760711429.169454` 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:	`!ba69c004`
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:	76 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ba69c004", "long_name": "CT7ALW-CL-8", "short_name": "7ALW", "macaddr": "ECC6acAE", "hw_model": "HELTEC_WIRELESS_TRACKER" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ba69c004", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3127492612, "to": 1660437776, "id": 2153975187, "rx_time": 1760711430, "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": 4, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216261363963303034120b435437414c572d434c2d381a0437414c5722061020ba69c00428304220d271c185c0bbcc92d1b8fd4a3de8db39e721348c441d88ea402a030d8a7b57194800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ba69c004", "long_name": "CT7ALW-CL-8", "short_name": "7ALW", "macaddr": "ECC6acAE", "hw_model": "HELTEC_WIRELESS_TRACKER", "public_key": "0nHBhcC7zJLRuP1KPejbOechNIxEHYjqQCoDDYp7Vxk=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (76 bytes)

0a09216261363963303034120b435437414c572d434c2d381a0437414c5722061020ba69c00428304220d271c185c0bbcc92d1b8fd4a3de8db39e721348c441d88ea402a030d8a7b57194800

Hex Analysis:

Size:	76 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 #397068 Successo

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