Packet #486623

Database ID:	486623
Mesh Packet ID:	`0x2bd33e1c` Utilizado para correlação entre gateways
Tempo:	2025-10-22 13:51:57 UTC
Do Node:	Xan99 supreme (X99C)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	CBN-4-CL-868 (END4)
Canal:	LongFast
RSSI:	-112 dBm
SNR:	-5.0 dBm
Info Hop:	4/4 hops Início: 4, Limite: 0

Long Name:	Xan99 supreme
Short Name:	X99C
Node ID:	!e2e5a950
MAC Address:	SCfi5alQ
Hardware:	LILYGO_TBEAM_S3_CORE

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:	78 bytes
Gateway:	!f1867bf3
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	4 / 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`	`!f1867bf3` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (78 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3806701904` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`78` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`4` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-112.0` dBm Signal strength at gateway	int32
`rx_snr`	`-5.00` dB Signal quality at gateway	float
`rx_time`	`1761136594` 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`	`254` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761137517.9308136` 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 (4 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!f1867bf3`
Signal Metrics:	RSSI: -112.0 dBm SNR: -5.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	78 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!e2e5a950", "long_name": "Xan99 supreme", "short_name": "X99C", "macaddr": "SCfi5alQ", "hw_model": "LILYGO_TBEAM_S3_CORE" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!f1867bf3", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3806701904, "to": 4294967295, "id": 735264284, "rx_time": 1761136594, "rx_snr": -5.0, "rx_rssi": -112, "hop_limit": 0, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 254, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216532653561393530120d58616e39392073757072656d651a045839394322064827e2e5a950280c4220c68aacb3e72a23c9b389b94256f16be49e762b6b2542a7e593066489698fbd4e4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!e2e5a950", "long_name": "Xan99 supreme", "short_name": "X99C", "macaddr": "SCfi5alQ", "hw_model": "LILYGO_TBEAM_S3_CORE", "public_key": "xoqss+cqI8mziblCVvFr5J52K2slQqflkwZkiWmPvU4=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (78 bytes)

0a09216532653561393530120d58616e39392073757072656d651a045839394322064827e2e5a950280c4220c68aacb3e72a23c9b389b94256f16be49e762b6b2542a7e593066489698fbd4e4800

Hex Analysis:

Size:	78 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 #486623 Successo

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