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Mesh network export has data loss problem

See original GitHub issue

Describe the bug The “App key binding data” of last provisioned node is missing in the exported JSON file. Import this mesh network data to the iOS nrf mesh library, and send mesh message to the model, the library will throw AccessError.modelNotBoundToAppKey error.

To Reproduce Steps to reproduce the behavior:

  1. Provision one node to the mesh network.
  2. Bind app key to its vendor model (06170000). ( Send “ConfigModelAppBind” ) ( Ref: Log-01 )
  3. Export current mesh network to JSON file. ( Ref: MeshNetwork-FirstExport.json )
  4. Review the exported JSON file, and check the “App key binding data” of first provisioned node. The “App key binding data” is empty now. ( Path=Root > nodes > elements > models > bind )
{
      "UUID": "17067101-0000-002A-3098-90296C020000",
      ...
      "elements": [
        {
          "name": "Element: 0x0002",
          "index": 0,
          "location": "0000",
          "models": [
            ...
            {
              "modelId": "06170000",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    }
  1. Provision second node to the mesh network.
  2. Bind app key to its vendor model (06170000). ( Send “ConfigModelAppBind” ) ( See Log-02 )
  3. Export current mesh network to JSON file. ( Ref: MeshNetwork-SecondExport.json )
  4. Review the exported JSON file, and check the “App key binding data” of first provisioned node. The “App key binding data” is filled. ( Path=Root > nodes > elements > models > bind )
{
      "UUID": "17067101-0000-002A-3098-90296C020000",
      ...
      "elements": [
        {
          "name": "Element: 0x0002",
          "index": 0,
          "location": "0000",
          "models": [
            ...
            {
              "modelId": "06170000",
              "bind": [
                0
              ],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    },
  1. Review the exported JSON file, and check the “App key binding data” of second provisioned node. The “App key binding data” is empty now. ( Path=Root > nodes > elements > models > bind )
{
      "UUID": "17067101-0000-0028-7832-50BBA8020000",
      ...
      "elements": [
        {
          "name": "Element: 0x0003",
          "index": 0,
          "location": "0000",
          "models": [
            ...
            {
              "modelId": "06170000",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    }

Expected behavior The “App key binding data” of nodes should not loss in the exported JSON file.

Platform details:

  • Device: Pixel 4a
  • OS: Android 11
  • Library Version: v3.1.6

Logs / Screenshots Log-01 - App client send “ConfigModelAppBind” to the first provisioned node, and receive response from that node.

V/MeshTransport(31110): Src address: 0001
V/MeshTransport(31110): Dst address: 0002
V/MeshTransport(31110): Key: 5424903DD9397E6355B6ACE27172E95B
V/MeshTransport(31110): akf: 0
V/MeshTransport(31110): aid: 0
V/MeshTransport(31110): aszmic: 0
V/MeshTransport(31110): Sequence number: 8
V/MeshTransport(31110): Access message opcode: 803d
V/MeshTransport(31110): Access message parameters: 0200000017060000
V/AccessLayer(31110): Created Access PDU 803D0200000017060000
V/UpperTransportLayer(31110): Device nonce: 02000000080001000200000000
V/UpperTransportLayer(31110): Encrypted upper transport pdu: 7C8C8AAA7B4511CF59BD7C2B484F
V/LowerTransportLayer(31110): Segmented Lower transport access PDU: 800020017C8C8AAA7B4511CF59BD7C2B 0 of 2
V/LowerTransportLayer(31110): Segmented Lower transport access PDU: 80002021484F 1 of 2
V/NetworkLayer(31110): Encryption key: B9E576B17E0B769B18D386946D87759F
V/NetworkLayer(31110): Privacy key: E2F004A6655029F47AB71168847189D6
V/NetworkLayer(31110): Sequence Number: 000008
V/NetworkLayer(31110): Encrypted Network payload: 1666B7ECB7C4BB52B4AA151EA3A9557B363DB10CDA03
V/NetworkLayer(31110): Sequence Number: 000009
V/NetworkLayer(31110): Encrypted Network payload: 27CF52654BA454E2370DA0F2
V/MeshManagerApi(31110): MeshNetwork pdu sent: 0x0053067B8D6A58CC27CF52654BA454E2370DA0F2
V/MeshManagerApi(31110): Received network pdu: 0x0053C78774E5782518FB0F9516F4F9075E3F5A907DF18BF7D3
V/BaseMeshMessageHandler(31110): TTL for received message: 7
V/BaseMeshMessageHandler(31110): Sequence number of received access message: 7
V/NetworkLayer(31110): TTL for received message: 7
V/DefaultNoOperationMessageState(31110): Acknowledgement payload: 00000003
V/BlockAcknowledgementMessage(31110): Segment 0 of 1 received by peer
V/BlockAcknowledgementMessage(31110): Segment 1 of 1 received by peer
V/MeshManagerApi(31110): Received network pdu: 0x0053ABC7D9817B5A07D9EBC544C794056BF3B4B6E1498E3E3162AF55A637
V/BaseMeshMessageHandler(31110): TTL for received message: 7
V/BaseMeshMessageHandler(31110): Sequence number of received access message: 8
V/NetworkLayer(31110): TTL for received message: 7
V/NetworkLayer(31110): Dst: 0x0001
D/LowerTransportLayer(31110): IV Index of received message: 0
D/LowerTransportLayer(31110): SeqAuth: 8
V/AccessLayer(31110): Received Access PDU 803E000200000017060000
V/ConfigModelAppStatus(31110): Status code: 0
V/ConfigModelAppStatus(31110): Status message: Success
V/ConfigModelAppStatus(31110): Element address: 0002
V/ConfigModelAppStatus(31110): App key index: 0000
V/ConfigModelAppStatus(31110): Model identifier: 6170000

Log-02 - App client send “ConfigModelAppBind” to the second provisioned node, and receive response from that node.

V/MeshTransport(31110): Src address: 0001
V/MeshTransport(31110): Dst address: 0003
V/MeshTransport(31110): Key: A246D36B9041D3A20F56BD786C940D58
V/MeshTransport(31110): akf: 0
V/MeshTransport(31110): aid: 0
V/MeshTransport(31110): aszmic: 0
V/MeshTransport(31110): Sequence number: 17
V/MeshTransport(31110): Access message opcode: 803d
V/MeshTransport(31110): Access message parameters: 0300000017060000
V/AccessLayer(31110): Created Access PDU 803D0300000017060000
V/UpperTransportLayer(31110): Device nonce: 02000000110001000300000000
V/UpperTransportLayer(31110): Encrypted upper transport pdu: 0E5DDA03810AD510B1B4FD40223B
V/LowerTransportLayer(31110): Segmented Lower transport access PDU: 800044010E5DDA03810AD510B1B4FD40 0 of 2
V/LowerTransportLayer(31110): Segmented Lower transport access PDU: 80004421223B 1 of 2
V/NetworkLayer(31110): Encryption key: B9E576B17E0B769B18D386946D87759F
V/NetworkLayer(31110): Privacy key: E2F004A6655029F47AB71168847189D6
V/NetworkLayer(31110): Sequence Number: 000011
V/NetworkLayer(31110): Encrypted Network payload: 1472FCB6F1CA8F8130ED67EC273CCC405D2B6174439B
V/NetworkLayer(31110): Sequence Number: 000012
V/NetworkLayer(31110): Encrypted Network payload: 6DF12D8196C6197A91FC5DB3
V/MeshManagerApi(31110): MeshNetwork pdu sent: 0x00536DAA3A5C6FAA6DF12D8196C6197A91FC5DB3
V/MeshManagerApi(31110): Received network pdu: 0x0053152E6C51D170BA7952EAB516157A171775C87C095CBD16
V/BaseMeshMessageHandler(31110): TTL for received message: 7
V/BaseMeshMessageHandler(31110): Sequence number of received access message: 7
V/NetworkLayer(31110): TTL for received message: 7
V/DefaultNoOperationMessageState(31110): Acknowledgement payload: 00000003
V/BlockAcknowledgementMessage(31110): Segment 0 of 1 received by peer
V/BlockAcknowledgementMessage(31110): Segment 1 of 1 received by peer
V/MeshManagerApi(31110): Received network pdu: 0x0053FD6356B702E8B6A72BD5B4C798F718BF37A85B6BAC470B19BBD22114
V/BaseMeshMessageHandler(31110): TTL for received message: 7
V/BaseMeshMessageHandler(31110): Sequence number of received access message: 8
V/NetworkLayer(31110): TTL for received message: 7
V/NetworkLayer(31110): Dst: 0x0001
D/LowerTransportLayer(31110): IV Index of received message: 0
D/LowerTransportLayer(31110): SeqAuth: 8
V/AccessLayer(31110): Received Access PDU 803E000300000017060000
V/ConfigModelAppStatus(31110): Status code: 0
V/ConfigModelAppStatus(31110): Status message: Success
V/ConfigModelAppStatus(31110): Element address: 0003
V/ConfigModelAppStatus(31110): App key index: 0000
V/ConfigModelAppStatus(31110): Model identifier: 6170000

MeshNetwork-FirstExport.json

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "http://www.bluetooth.com/specifications/assigned-numbers/mesh-profile/cdb-schema.json#",
  "version": "1.0.0",
  "meshUUID": "E05AFE3B-E9C8-4ABA-B6B5-31EADB1B0006",
  "meshName": "nRF Mesh Network",
  "timestamp": "2021-08-12T13:52:53+08:00",
  "partial": false,
  "netKeys": [
    {
      "name": "Network Key 1",
      "index": 0,
      "key": "799F6C4B3801A652F485021174614CE1",
      "phase": 0,
      "minSecurity": "insecure",
      "timestamp": "2021-08-12T13:51:58+08:00"
    }
  ],
  "appKeys": [
    {
      "name": "Application Key 1",
      "index": 0,
      "boundNetKey": 0,
      "key": "3C75A88FAB4CC2FEED5A5F95BFEC3B5E"
    },
    {
      "name": "Application Key 2",
      "index": 1,
      "boundNetKey": 0,
      "key": "C05C632052B07C9D6CC748A1BC919EF7"
    },
    {
      "name": "Application Key 3",
      "index": 2,
      "boundNetKey": 0,
      "key": "90DDD253D08F63BC1660075A6494FC28"
    }
  ],
  "provisioners": [
    {
      "provisionerName": "nRF Mesh Provisioner",
      "UUID": "6DD1CF43-C9F4-4C38-AB9C-D8C7B269ED60",
      "allocatedUnicastRange": [
        {
          "lowAddress": "0001",
          "highAddress": "199A"
        }
      ],
      "allocatedGroupRange": [
        {
          "lowAddress": "C000",
          "highAddress": "CC9A"
        }
      ],
      "allocatedSceneRange": [
        {
          "firstScene": "0001",
          "lastScene": "3333"
        }
      ]
    }
  ],
  "nodes": [
    {
      "UUID": "6DD1CF43-C9F4-4C38-AB9C-D8C7B269ED60",
      "name": "nRF Mesh Provisioner",
      "deviceKey": "FCBA0DB25970FD97357C0AC5ABE24E5E",
      "unicastAddress": "0001",
      "security": "insecure",
      "configComplete": true,
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 2,
        "relay": 2
      },
      "defaultTTL": 5,
      "netKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "appKeys": [
        {
          "index": 0,
          "updated": false
        },
        {
          "index": 1,
          "updated": false
        },
        {
          "index": 2,
          "updated": false
        }
      ],
      "elements": [
        {
          "name": "Element: 0x0001",
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0001",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    },
    {
      "UUID": "17067101-0000-002A-3098-90296C020000",
      "name": "My Node",
      "deviceKey": "5424903DD9397E6355B6ACE27172E95B",
      "unicastAddress": "0002",
      "security": "insecure",
      "configComplete": false,
      "cid": "0617",
      "pid": "0000",
      "vid": "0000",
      "crpl": "000A",
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 1,
        "relay": 1
      },
      "defaultTTL": 7,
      "networkTransmit": {
        "count": 2,
        "interval": 20
      },
      "netKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "appKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "elements": [
        {
          "name": "Element: 0x0002",
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "1000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "06170000",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    }
  ],
  "groups": [],
  "scenes": [],
  "networkExclusions": []
}

MeshNetwork-SecondExport.json

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "http://www.bluetooth.com/specifications/assigned-numbers/mesh-profile/cdb-schema.json#",
  "version": "1.0.0",
  "meshUUID": "E05AFE3B-E9C8-4ABA-B6B5-31EADB1B0006",
  "meshName": "nRF Mesh Network",
  "timestamp": "2021-08-12T13:55:47+08:00",
  "partial": false,
  "netKeys": [
    {
      "name": "Network Key 1",
      "index": 0,
      "key": "799F6C4B3801A652F485021174614CE1",
      "phase": 0,
      "minSecurity": "insecure",
      "timestamp": "2021-08-12T13:51:58+08:00"
    }
  ],
  "appKeys": [
    {
      "name": "Application Key 1",
      "index": 0,
      "boundNetKey": 0,
      "key": "3C75A88FAB4CC2FEED5A5F95BFEC3B5E"
    },
    {
      "name": "Application Key 2",
      "index": 1,
      "boundNetKey": 0,
      "key": "C05C632052B07C9D6CC748A1BC919EF7"
    },
    {
      "name": "Application Key 3",
      "index": 2,
      "boundNetKey": 0,
      "key": "90DDD253D08F63BC1660075A6494FC28"
    }
  ],
  "provisioners": [
    {
      "provisionerName": "nRF Mesh Provisioner",
      "UUID": "6DD1CF43-C9F4-4C38-AB9C-D8C7B269ED60",
      "allocatedUnicastRange": [
        {
          "lowAddress": "0001",
          "highAddress": "199A"
        }
      ],
      "allocatedGroupRange": [
        {
          "lowAddress": "C000",
          "highAddress": "CC9A"
        }
      ],
      "allocatedSceneRange": [
        {
          "firstScene": "0001",
          "lastScene": "3333"
        }
      ]
    }
  ],
  "nodes": [
    {
      "UUID": "6DD1CF43-C9F4-4C38-AB9C-D8C7B269ED60",
      "name": "nRF Mesh Provisioner",
      "deviceKey": "FCBA0DB25970FD97357C0AC5ABE24E5E",
      "unicastAddress": "0001",
      "security": "insecure",
      "configComplete": true,
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 2,
        "relay": 2
      },
      "defaultTTL": 5,
      "netKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "appKeys": [
        {
          "index": 0,
          "updated": false
        },
        {
          "index": 1,
          "updated": false
        },
        {
          "index": 2,
          "updated": false
        }
      ],
      "elements": [
        {
          "name": "Element: 0x0001",
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0001",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    },
    {
      "UUID": "17067101-0000-002A-3098-90296C020000",
      "name": "My Node",
      "deviceKey": "5424903DD9397E6355B6ACE27172E95B",
      "unicastAddress": "0002",
      "security": "insecure",
      "configComplete": false,
      "cid": "0617",
      "pid": "0000",
      "vid": "0000",
      "crpl": "000A",
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 1,
        "relay": 1
      },
      "defaultTTL": 7,
      "networkTransmit": {
        "count": 2,
        "interval": 20
      },
      "netKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "appKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "elements": [
        {
          "name": "Element: 0x0002",
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "1000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "06170000",
              "bind": [
                0
              ],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    },
    {
      "UUID": "17067101-0000-0028-7832-50BBA8020000",
      "name": "My Node",
      "deviceKey": "A246D36B9041D3A20F56BD786C940D58",
      "unicastAddress": "0003",
      "security": "insecure",
      "configComplete": false,
      "cid": "0617",
      "pid": "0000",
      "vid": "0000",
      "crpl": "000A",
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 1,
        "relay": 1
      },
      "defaultTTL": 7,
      "networkTransmit": {
        "count": 2,
        "interval": 20
      },
      "netKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "appKeys": [
        {
          "index": 0,
          "updated": false
        }
      ],
      "elements": [
        {
          "name": "Element: 0x0003",
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "1000",
              "bind": [],
              "subscribe": []
            },
            {
              "modelId": "06170000",
              "bind": [],
              "subscribe": []
            }
          ]
        }
      ],
      "excluded": false
    }
  ],
  "groups": [],
  "scenes": [],
  "networkExclusions": []
}

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:8 (5 by maintainers)

github_iconTop GitHub Comments

1reaction
roshanrajaratnamcommented, Jan 21, 2022

I have no idea how to use one MeshManagerApi instance to manage 2 bluetooth connections.

I don’t see the need to use two instances of the mesh manager api. Here’s a suggestion.

  • Establish two connections, one to a provisioned device ‘A’ and an unprovisioned node ‘B’
  • Provision device ‘B’ and don’t reconnect after provisionining.
  • Continue configuration over the existing connection with device ‘A’

When I use MeshManagerApi#createMeshPdu, this method will return several responses through MeshManagerCallbacks#onMeshPduCreated. If the application needs to send different message over these connections at the same time, then I will need to call MeshManagerApi#createMeshPdu 2 times. When I receive several responses from MeshManagerCallbacks#onMeshPduCreated, I don’t know which connection I should use to send data…

On BleManagerGattCallback#isRequiredServiceSupported, how to know which BluetoothDevice is currently connecting?

I understand your issue, ususally there is no principle of BluetoothDevice or it’s MacAddress in a mesh network eventhough there is a GATT connection. Ideally we should not depend on the MacAddress because the address can change after a reboot. In addition, you are not communicating directly with a device. You are expecting the proxy to propagate your message based on the Unicast/Group/Label address

0reactions
KcLeung514commented, Jan 20, 2022

First why do you use 2 separate instances to manage the same network data?

Because I want to manage to 2 bluetooth connection in one mesh network. One for provisioning device, One for send control message to other devices.

I have no idea how to use one MeshManagerApi instance to manage 2 bluetooth connections.

When I use MeshManagerApi#createMeshPdu, this method will return several responses through MeshManagerCallbacks#onMeshPduCreated. If the application needs to send different message over these connections at the same time, then I will need to call MeshManagerApi#createMeshPdu 2 times. When I receive several responses from MeshManagerCallbacks#onMeshPduCreated, I don’t know which connection I should use to send data…

On BleManagerGattCallback#isRequiredServiceSupported, how to know which BluetoothDevice is currently connecting?

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