ota-requestor-app (Linux)

This is a reference application that is both a server for the OTA Requestor Cluster, as well as a client of the OTA Provider Cluster. It can initiate a software update with a given OTA Provider node, and download a file.

Build

Suggest doing the following:

scripts/examples/gn_build_example.sh examples/ota-requestor-app/linux out/debug chip_config_network_layer_ble=false

Usage

In addition to the general options available to all Linux applications, the following command line options are available for the OTA Requestor application. Note that these options are for testing purposes.

Software Image Version

The current software version of the OTA Requestor application is defined by CHIP_DEVICE_CONFIG_DEVICE_SOFTWARE_VERSION in CHIPProjectConfig.h. This value can be confirmed by reading the SoftwareVersion attribute of the Basic Information cluster:

out/chip-tool basic read software-version 0x1234567890 0

Validations

On receiving the QueryImageResponse from the OTA Provider application, the OTA Requestor application will verify that the software version specified in the SoftwareVersion field of the response contains a value newer than the current running version. If the update supplied does not pass this version check, the following log message should be expected, indicating the update will not proceed:

[1648233572232] [48462:7613274] CHIP: [SWU] Available update version 1 is <= current version 1, update ignored

If the OTA update progresses to downloading, the process will abort if the software image header is missing. The following log messages should be expected:

[1648246917398] [71786:7874994] CHIP: [SWU] Image does not contain a valid header
[1648246917399] [71786:7874994] CHIP: [BDX] TransferSession error

On booting into the new image, if the running version does not match the version specified in the QueryImageResponse, the following log message should be expected:

[1648244159295] [58606:7774255] CHIP: [SWU] Failed to confirm image: ../../examples/ota-requestor-app/linux/third_party/connectedhomeip/src/platform/Linux/OTAImageProcessorImpl.cpp:110: CHIP Error 0x00000003: Incorrect state

This message serves as a warning that the new image is not expected. However, the OTA Requestor application will recover gracefully and return to a state where another OTA update may be initiated.

Generate Images

To validate booting into a newer OTA Requestor image on the Linux platform, the following must be performed:

1. Modify CHIP_DEVICE_CONFIG_DEVICE_SOFTWARE_VERSION to a value greater than the current running version
2. Build an OTA Requestor application with the new version
3. Using the executable created in step 2, generate an image with a software image header that matches the version in step 1
4. Use this generated binary when supplying the image file to the OTA Provider application
5. Launch the original application (an OTA Requestor application generated prior to step 1) with the command line option --autoApplyImage

Common Instructions

The Linux ota-provider-app can be used together with this reference application to test OTA features. Here are some common instructions for building and commissioning the applications.

OTA Provider application

Build the OTA Provider application

Follow instructions here

Run the OTA Provider application

out/chip-ota-provider-app --discriminator ${PROVIDER_LONG_DISCRIMINATOR} --secured-device-port ${PROVIDER_UDP_PORT} --KVS ${KVS_STORE_LOCATION} --filepath ${SW_IMAGE_FILE}

• ${PROVIDER_LONG_DISCRIMINATOR} is the long discriminator specified for the OTA Provider application for commissioning discovery. If none is supplied, the default is 3840. This must be different from the value used by the OTA Requestor application.
• ${PROVIDER_UDP_PORT} is the UDP port that the OTA Provider application listens on for secure connections. If none is supplied, the default is 5540. This must be different from the value used by the OTA Requestor application.
• ${KVS_STORE_LOCATION} is a location where the KVS items will be stored. If none is supplied, the default is /tmp/chip_kvs. This must be different from the value used by the OTA Requestor application.
• ${SW_IMAGE_FILE} is the file representing a software image to be served. This file must include a header as defined in the specification.

Commission the OTA Provider application

out/chip-tool pairing onnetwork-long ${PROVIDER_NODE_ID} 20202021 ${PROVIDER_LONG_DISCRIMINATOR}

• ${PROVIDER_NODE_ID} is the node id to assign to the OTA Provider application running
• ${PROVIDER_LONG_DISCRIMINATOR} is the long discriminator of the OTA Provider application running

OTA Requestor application

Build the OTA Requestor application

Follow instructions here

Run the OTA Requestor application:

out/chip-ota-requestor-app --discriminator ${REQUESTOR_LONG_DISCRIMINATOR} --secured-device-port ${REQUESTOR_UDP_PORT} --KVS ${KVS_STORE_LOCATION} --periodicQueryTimeout ${TIME_IN_SECONDS} --autoApplyImage

• ${REQUESTOR_LONG_DISCRIMINATOR} is the long discriminator specified for the OTA Requestor application for commissioning discovery. If none is supplied, the default is 3840. This must be different from the value used by the OTA Provider application.
• ${REQUESTOR_UDP_PORT} is the UDP port that the OTA Requestor application listens on for secure connections. If none is supplied, the default is 5540. This must be different from the value used by the OTA Provider application.
• ${KVS_STORE_LOCATION} is a location where the KVS items will be stored. If none is supplied, the default is /tmp/chip_kvs. This must be different from the value used by the OTA Provider application.
• ${TIME_IN_SECONDS} is the periodic timeout for querying providers in the default OTA provider list. If none or zero is supplied the timeout is set to every 24 hours.
• --autoApplyImage is supplied to indicate the image should be immediately applied after download. If not supplied, the OTA update is complete after image download.

Commission the OTA Requestor application

out/chip-tool pairing onnetwork-long ${REQUESTOR_NODE_ID} 20202021 ${REQUESTOR_LONG_DISCRIMINATOR}

• ${REQUESTOR_NODE_ID} is the node id to assign to the OTA Requestor application running
• ${REQUESTOR_LONG_DISCRIMINATOR} is the long discriminator of the OTA Requestor application running

Examples

There are two methods for this reference application to connect to a device running OTA Provider server and download a software image.

If the ACL entry on the provider has not been properly installed, the QueryImage command will be denied. Logs similar to the following may be observed on the OTA Provider application:

[1648244658368] [59686:7786439] CHIP: [DMG] AccessControl: checking f=1 a=c s=0x000000000000FACE t= c=0x0000_0029 e=0 p=o
[1648244658368] [59686:7786439] CHIP: [DMG] AccessControl: denied

If this is encountered, follow instructions here to install. Note that this only needs to be performed once. There is no need to write this ACL entry again unless the KVS store has been removed.

Trigger using AnnounceOTAProvider Command

When the AnnounceOTAProvider command is received, it will trigger a QueryImage command to the provider specified in the command and start the OTA process.

In terminal 1:

Build the OTA Provider application

scripts/examples/gn_build_example.sh examples/ota-provider-app/linux/ out chip_config_network_layer_ble=false

Run the OTA Provider application

out/chip-ota-provider-app --discriminator 22 --secured-device-port 5565 --KVS /tmp/chip_kvs_provider --filepath /tmp/ota-image.bin

In terminal 2:

Build the OTA Requestor application

scripts/examples/gn_build_example.sh examples/ota-requestor-app/linux/ out chip_config_network_layer_ble=false

Run the OTA Requestor application

out/chip-ota-requestor-app --discriminator 18 --secured-device-port 5560 --KVS /tmp/chip_kvs_requestor

In terminal 3:

Commission the OTA Provider application

out/chip-tool pairing onnetwork-long 0xDEADBEEF 20202021 22

Commission the OTA Requestor application

out/chip-tool pairing onnetwork-long 0x1234567890 20202021 18

Issue the AnnounceOTAProvider command

out/chip-tool otasoftwareupdaterequestor announce-otaprovider 0xDEADBEEF 0 0 0 0x1234567890 0

The OTA Requestor application with node ID 0x1234567890 will process this command and send a QueryImage command to the OTA Provider with node ID 0xDEADBEEF, as specified in the AnnounceOTAProvider command.

Trigger using DefaultOTAProviders attribute

If one or more provider locations have been written to the DefaultOTAProviders attribute, this can be used to trigger a QueryImage command to a provider in the attribute and start the OTA process.

In terminal 1:

Build the OTA Provider application

scripts/examples/gn_build_example.sh examples/ota-provider-app/linux/ out chip_config_network_layer_ble=false

Run the OTA Provider application

out/chip-ota-provider-app --discriminator 22 --secured-device-port 5565 --KVS /tmp/chip_kvs_provider --filepath /tmp/ota-image.bin

In terminal 2:

Build the OTA Requestor application

scripts/examples/gn_build_example.sh examples/ota-requestor-app/linux/ out chip_config_network_layer_ble=false

Run the OTA Requestor application

out/chip-ota-requestor-app --discriminator 18 --secured-device-port 5560 --KVS /tmp/chip_kvs_requestor --periodicQueryTimeout 60 --otaDownloadPath /tmp/test.bin

In terminal 3:

Commission the OTA Provider application

out/chip-tool pairing onnetwork-long 0xDEADBEEF 20202021 22

Commission the OTA Requestor application

out/chip-tool pairing onnetwork-long 0x1234567890 20202021 18

Write to the DefaultOTAProviders attribute

out/chip-tool otasoftwareupdaterequestor write default-ota-providers '[{"providerNodeID": 3735928559, "endpoint": 0}]' 0x1234567890 0

Every 60 seconds from when the OTA Requestor application has launched, the OTA Requestor application with node ID 0x1234567890 will send a QueryImage command to the OTA Provider with node ID 0xDEADBEEF, as specified in the DefaultOTAProviders attribute.

DefaultOTAProviders attribute

The DefaultOTAProviders attribute represents a list of ProviderLocation structs. Each entry in this list is a default OTA Provider per fabric. There can not be more than one entry containing the same fabric.

To add more than one entry to the DefaultOTAProviders attribute, the OTA Requestor app must be commissioned into multiple fabrics. At least one OTA Provider app should be commissioned into each corresponding fabric that the OTA Requestor app had been commissioned into.

The following example has two OTA Provider apps, each commissioned into a different fabric (alpha and beta) and one OTA Requestor app commissioned into both alpha and beta fabrics.

In terminal 1:

Build the OTA Provider application

scripts/examples/gn_build_example.sh examples/ota-provider-app/linux/ out chip_config_network_layer_ble=false

Run the first OTA Provider application

out/chip-ota-provider-app --discriminator 22 --secured-device-port 5565 --KVS /tmp/chip_kvs_provider --filepath /tmp/ota-image.bin

In terminal 2:

Run the second OTA Provider application

out/chip-ota-provider-app --discriminator 23 --secured-device-port 5566 --KVS /tmp/chip_kvs_provider2 --filepath /tmp/ota-image2.bin

In terminal 3:

Build the OTA Requestor application

scripts/examples/gn_build_example.sh examples/ota-requestor-app/linux/ out chip_config_network_layer_ble=false

Run the OTA Requestor application

out/chip-ota-requestor-app --discriminator 18 --secured-device-port 5560 --KVS /tmp/chip_kvs_requestor --periodicQueryTimeout 10

In terminal 4:

Commission the first OTA Provider into the first fabric (alpha)

out/chip-tool pairing onnetwork-long 0xC0FFEE 20202021 22

Commission the second OTA Provider into the second fabric (beta)

out/chip-tool pairing onnetwork-long 0xB0BA 20202021 23 --commissioner-name beta

Commission the OTA Requestor application into the first fabric (alpha)

out/chip-tool pairing onnetwork-long 0xDEB 20202021 18

Open Basic Commissioning Window for the OTA Requestor application

out/chip-tool administratorcommissioning open-basic-commissioning-window 600 0xDEB 0 --timedInteractionTimeoutMs 600

Commission the OTA Requestor application into the second fabric (beta)

out/chip-tool pairing onnetwork-long 0xB0B 20202021 18 --commissioner-name beta

Write/Read DefaultOTAProviders on the first fabric (alpha)

out/chip-tool otasoftwareupdaterequestor write default-ota-providers '[{"providerNodeID": 12648430, "endpoint": 0}]' 0xDEB 0
out/chip-tool otasoftwareupdaterequestor read default-ota-providers 0xDEB 0

Write/Read DefaultOTAProviders on second fabric (beta)

out/chip-tool otasoftwareupdaterequestor write default-ota-providers '[{"providerNodeID": 45242, "endpoint": 0}]' 0xB0B 0 --commissioner-name beta
out/chip-tool otasoftwareupdaterequestor read default-ota-providers 0xB0B 0 --commissioner-name beta

Write ACL for the first OTA Provider application

out/chip-tool accesscontrol write acl '[{"privilege": 5, "authMode": 2, "subjects": [112233], "targets": null}, {"privilege": 3, "authMode": 2, "subjects": null, "targets": [{"cluster": 41, "endpoint": null, "deviceType": null}]}]' 0xC0FFEE 0

Write ACL for the second OTA Provider application

out/chip-tool accesscontrol write acl '[{"privilege": 5, "authMode": 2, "subjects": [112233], "targets": null}, {"privilege": 3, "authMode": 2, "subjects": null, "targets": [{"cluster": 41, "endpoint": null, "deviceType": null}]}]' 0xB0BA 0 --commissioner-name beta

NOTE: For all operations, specify which fabric to use by passing in --commissioner-name. The supported values are alpha, beta, and gamma. By default, if none is supplied, alpha is used.