Packet #413750

Database ID:	413750
Mesh Packet ID:	`0x140f3aec` Utilizado para correlação entre gateways
Tempo:	2025-10-18 15:30:55 UTC
Do Node:	Meshtastic 96f8-8🇵🇹🇻🇪 (96f8)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	HK-ALMF-GT-8 (HK4G)
Canal:	LongFast
RSSI:	-126 dBm
SNR:	-15.0 dBm
Info Hop:	2/4 hops Início: 4, Limite: 2

Long Name:	Meshtastic 96f8-8🇵🇹🇻🇪
Short Name:	96f8
Node ID:	!9af896f8
MAC Address:	y6Oa+Jb4
Hardware:	TRACKER_T1000_E

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:	98 bytes
Gateway:	!75cbfba7
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 4

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!75cbfba7` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (98 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2599982840` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`98` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-126.0` dBm Signal strength at gateway	int32
`rx_snr`	`-15.00` dB Signal quality at gateway	float
`rx_time`	`1760797695` 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`	`116` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760797855.4714904` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Broadcast

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!75cbfba7`
Signal Metrics:	RSSI: -126.0 dBm SNR: -15.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	98 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!9af896f8", "long_name": "Meshtastic 96f8-8🇵🇹🇻🇪", "short_name": "96f8", "macaddr": "y6Oa+Jb4", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!75cbfba7", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2599982840, "to": 4294967295, "id": 336542444, "rx_time": 1760797695, "rx_snr": -15.0, "rx_rssi": -126, "hop_limit": 2, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 116, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921396166383936663812214d65736874617374696320393666382d38f09f87b5f09f87b9f09f87bbf09f87aa1a04393666382206cba39af896f8284742202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e2914587254800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!9af896f8", "long_name": "Meshtastic 96f8-8🇵🇹🇻🇪", "short_name": "96f8", "macaddr": "y6Oa+Jb4", "hw_model": "TRACKER_T1000_E", "public_key": "KzIbS2tRqpaFe45u13bCWA9iUb3JPb2pXS6Z4pFFhyU=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (98 bytes)

0a0921396166383936663812214d65736874617374696320393666382d38f09f87b5f09f87b9f09f87bbf09f87aa1a04393666382206cba39af896f8284742202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e2914587254800

Hex Analysis:

Size:	98 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 #413750 Successo

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