Client Application

Provides GRPC and HTTP APIs to interact with the OCF devices via D2D communication.

Run

The client application can be run by executing the following command:

./client-application

• Default config.yaml file will be generated in case it's not in the same directory as the client application, or if a different path with the existing config isn't specified.
• Default web UI files will be copied to the www folder next to the client application in case it doesn't exist, or if a different path with existing UI files isn't specified in the config file.

Supported options

• --config: path to the config file
• --version: print the version of the client application

Build

The build process uses goreleaser, so you will need to commit all changes and create a tag on the local machine.

git commit -a -m "my changes"
git tag -f v0.0.1-myversion
make build

Docker

You can run the client application in a docker container by executing the following command.

docker run --rm -it -e NUM_DEVICES=1 -p 8080:8080 ghcr.io/plgd-dev/client-application:latest

Via environment variable NUM_DEVICES you can specify the number of devices simulators. The default value is 1. The client application will be available at http://locahost:8080.

YAML Configuration

A configuration template is available on config.yaml.

Logging

Property	Type	Description	Default
log.dumpBody	bool	Set to true if you would like to dump raw messages.	false
log.level	string	Logging enabled from level.	"info"
log.encoding	string	Logging format. The supported values are: "json", "console"	"console"
log.stacktrace.enabled	bool	Log stacktrace.	"false
log.stacktrace.level	string	Stacktrace from level.	"warn
log.encoderConfig.timeEncoder	string	Time format for logs. The supported values are: "rfc3339nano", "rfc3339".	"rfc3339nano

HTTP API

HTTP API of the client application service as defined swagger.

Property	Type	Description	Default
apis.http.enabled	bool	Enable the HTTP API.	true
apis.http.cors.allowedOrigins	[]string	Sets the allowed origins for CORS requests, as used in the 'Allow-Access-Control-Origin' HTTP header. Passing in a "*" will allow any domain.	"*"
apis.http.cors.allowedHeaders	[]string	Adds the provided headers to the list of allowed headers in a CORS request. This is an append operation so the headers Accept, Accept-Language, and Content-Language are always allowed. Content-Type must be explicitly declared if accepting Content-Types other than application/x-www-form-urlencoded, multipart/form-data, or text/plain.	"Accept","Accept-Language","Accept-Encoding","Content-Type","Content-Language","Content-Length","Origin","X-CSRF-Token","Authorization"
apis.http.cors.allowedMethods	[]string	Explicitly set allowed methods in the Access-Control-Allow-Methods header. This is a replacement operation so you must also pass GET, HEAD, and POST if you wish to support those methods.	"GET","PATCH","HEAD","POST","PUT","OPTIONS","DELETE"
apis.http.cors.allowCredentials	bool	User agent may pass authentication details along with the request.	false
apis.http.address	string	Listen specification <host>:<port> for http client connection.	"0.0.0.0:8080"
apis.http.readTimeout	string	The maximum duration for reading the entire request, including the body by the server. A zero or negative value means there will be no timeout.	8s
apis.http.readHeaderTimeout	string	The amount of time allowed to read request headers by the server. If readHeaderTimeout is zero, the value of readTimeout is used. If both are zero, there is no timeout.	4s
apis.http.writeTimeout	string	The maximum duration before the server times out writing of the response. A zero or negative value means there will be no timeout.	16s
apis.http.idleTimeout	string	The maximum amount of time the server waits for the next request when keep-alives are enabled. If idleTimeout is zero, the value of readTimeout is used. If both are zero, there is no timeout.	30s
apis.http.ui.enabled	bool	Set to true if you would like to run the web UI.	false
apis.http.ui.directory	string	A path to the directory with web UI files. When it is not present, it creates <client_application_binary>/www with default ui.	""
apis.http.tls.enabled	bool	Enable HTTPS.	false
apis.http.tls.caPool	[]string	File path to the root certificate in PEM format which might contain multiple certificates in a single file.	""
apis.http.tls.keyFile	string	File path to private key in PEM format.	""
apis.http.tls.certFile	string	File path to certificate in PEM format.	""
apis.http.tls.clientCertificateRequired	bool	If true, require client certificate.	true

gRPC API

gRPC API of the client application service as defined service.

Property	Type	Description	Default
apis.grpc.enabled	bool	Enable the GRPC API.	true
apis.grpc.address	string	Listen specification <host>:<port> for grpc client connection.	"0.0.0.0:8081"
apis.grpc.enforcementPolicy.minTime	string	The minimum amount of time a client should wait before sending a keepalive ping. Otherwise the server close connection.	5s
apis.grpc.enforcementPolicy.permitWithoutStream	bool	If true, server allows keepalive pings even when there are no active streams(RPCs). Otherwise the server close connection.	false
apis.grpc.keepAlive.maxConnectionIdle	string	A duration for the amount of time after which an idle connection would be closed by sending a GoAway. 0s means infinity.	0s
apis.grpc.keepAlive.maxConnectionAge	string	A duration for the maximum amount of time a connection may exist before it will be closed by sending a GoAway. 0s means infinity.	0s
apis.grpc.keepAlive.maxConnectionAgeGrace	string	An additive period after MaxConnectionAge after which the connection will be forcibly closed. 0s means infinity.	0s
apis.grpc.keepAlive.time	string	After a duration of this time if the server doesn't see any activity it pings the client to see if the transport is still alive.	2h
apis.grpc.keepAlive.timeout	string	After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that the connection is closed.	20s
apis.grpc.tls.caPool	[]string	File path to the root certificate in PEM format which might contain multiple certificates in a single file.	""
apis.grpc.tls.enabled	bool	Enable TLS for grpc.	false
apis.grpc.tls.keyFile	string	File path to private key in PEM format.	""
apis.grpc.tls.certFile	string	File path to certificate in PEM format.	""
apis.grpc.tls.clientCertificateRequired	bool	If true, require client certificate.	true

Device client

The configuration sets up access to the devices via COAP protocol.

Property	Type	Description	Default
apis.coap.maxMessageSize	int	Max message size which can be sent/received via coap. i.e. 256*1024 = 262144 bytes.	262144
apis.coap.inactivityMonitor.timeout	string	Time limit to close inactive connection.	20s
apis.coap.blockwiseTransfer.enabled	bool	If true, enable blockwise transfer of coap messages.	false
apis.coap.blockwiseTransfer.blockSize	int	Size of blockwise transfer block.	1024
apis.coap.ownershipTransfer.methods	[]string	Allowed ownership transfer methods. The supported values are: "justWorks", "manufacturerCertificate".	"justWorks"
apis.coap.ownershipTransfer.manufacturerCertificate.tls.caPool	[]string	File paths to the root certificates in PEM format. The file may contain multiple certificates.	""
apis.coap.ownershipTransfer.manufacturerCertificate.tls.keyFile	string	File path to certificate client application private key in PEM format.	""
apis.coap.ownershipTransfer.manufacturerCertificate.tls.certFile	string	File path to certificate client application certificate in PEM format.	""
apis.coap.tls.preSharedKey.subjectId	string	Provides an identifier for client applications for establishing TLS connections or for devices that are set as owner devices	""
apis.coap.tls.preSharedKey.key	string	Pre-shared key used in conjunction with subjectId to enable TLS connection.	""

Remote provisioning

The configuration sets up ownership and authorization of devices via the remote provisioning mode.

Supported modes:

• Devices and single client configure remoteProvisioning.mode to ""
• User agent mediates CSR from the client configure remoteProvisioning.mode to "userAgent" and all other properties.

Property	Type	Description	Default
remoteProvisioning.mode	string	Provides remote provisioning mode. In "userAgent" mode all signing certificates goes through the user agent (browser,cli). "" means none. The supported values are: "", "userAgent"	""
remoteProvisioning.certificateAuthority	string	Certificate authority server address in format {SCHEME}://{DNS}:{PORT}	""
remoteProvisioning.userAgent.csrChallengeStateExpiration	string	Defines how long is valid csr challenge.	"1m"
remoteProvisioning.authority	string	Authority is the address of the token-issuing authentication server.	""
remoteProvisioning.webOAuthClient.clientID	string	Client ID to exchange an authorization code for an access token.	""
remoteProvisioning.webOAuthClient.audience	string	Identifier of the API configured in your OAuth provider.	""
remoteProvisioning.webOAuthClient.scopes	[]string	List of required scopes.	[]
remoteProvisioning.ownerClaim	string	Claim used to identify owner of the device.	"sub"
remoteProvisioning.hubID	string	Plgd hub id.	""
remoteProvisioning.coapGateway	string	CoAP gateway for onboard device.	""
remoteProvisioning.caPool	[]string	File paths to root CAs which was used to sign coap-gw certificate.	""
remoteProvisioning.deviceOAuthClient.clientID	string	Client ID to exchange an authorization code for an access token.	""
remoteProvisioning.deviceOAuthClient.audience	string	Identifier of the API configured in your OAuth provider.	""
remoteProvisioning.deviceOAuthClient.scopes	[]string	List of required scopes.	[]
remoteProvisioning.deviceOAuthClient.providerName	string	Name of provider, which needs to be set to cloud resource during cloud provisioning.	""

Note that the string type related to time (i.e. timeout, idleConnTimeout, expirationTime) is decimal numbers, each with optional fraction and a unit suffix, such as "300ms", "1.5h" or "2h45m". Valid time units are "ns", "us", "ms", "s", "m", "h".