/
package.go
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/
package.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package loraclouddevicemanagementv1
import (
"context"
"net/http"
"github.com/grpc-ecosystem/grpc-gateway/runtime"
"go.thethings.network/lorawan-stack/pkg/applicationserver/io"
"go.thethings.network/lorawan-stack/pkg/applicationserver/io/packages"
"go.thethings.network/lorawan-stack/pkg/applicationserver/io/packages/loradms/v1/api"
"go.thethings.network/lorawan-stack/pkg/applicationserver/io/packages/loradms/v1/api/objects"
"go.thethings.network/lorawan-stack/pkg/errors"
"go.thethings.network/lorawan-stack/pkg/log"
"go.thethings.network/lorawan-stack/pkg/ttnpb"
"google.golang.org/grpc"
)
// DeviceManagementPackage is the LoRa Cloud Device Management application package.
type DeviceManagementPackage struct {
server io.Server
registry packages.Registry
}
// RegisterServices implements packages.ApplicationPackageHandler.
func (p *DeviceManagementPackage) RegisterServices(s *grpc.Server) {}
// RegisterHandlers implements packages.ApplicationPackageHandler.
func (p *DeviceManagementPackage) RegisterHandlers(s *runtime.ServeMux, conn *grpc.ClientConn) {}
var (
errDeviceEUIMissing = errors.DefineNotFound("device_eui_missing", "device EUI `{dev_eui}` not found")
errUplinkRequestFailed = errors.DefineInternal("uplink_request_failed", "uplink request failed")
)
// HandleUp implements packages.ApplicationPackageHandler.
func (p *DeviceManagementPackage) HandleUp(ctx context.Context, assoc *ttnpb.ApplicationPackageAssociation, up *ttnpb.ApplicationUp) error {
ctx = log.NewContextWithField(ctx, "namespace", "applicationserver/io/packages/loradms/v1")
logger := log.FromContext(ctx)
if up.DevEUI == nil || up.DevEUI.IsZero() {
logger.Debug("Package configured for end device with no device EUI")
return nil
}
eui := objects.EUI(*up.DevEUI)
message := up.GetUplinkMessage()
settings := message.GetSettings()
uplink := objects.LoRaUplink{
FCnt: message.GetFCnt(),
Port: uint8(message.GetFPort()),
Payload: objects.Hex(message.FRMPayload),
DR: uint8(settings.DataRateIndex),
Freq: uint32(settings.GetFrequency()),
Timestamp: float64(message.ReceivedAt.UTC().Unix()),
}
var data packageData
err := data.fromStruct(assoc.Data)
if errors.IsNotFound(err) {
// If there is no package data available, just reset the data.
data = packageData{}
assoc, err = p.registry.Set(ctx, assoc.ApplicationPackageAssociationIdentifiers, []string{"data"},
func(assoc *ttnpb.ApplicationPackageAssociation) (*ttnpb.ApplicationPackageAssociation, []string, error) {
assoc.Data = data.toStruct()
return assoc, []string{"data"}, nil
},
)
if err != nil {
logger.WithError(err).Debug("Failed to update package data")
return err
}
} else if err != nil {
logger.WithError(err).Debug("Failed to parse package data")
return err
}
client, err := api.New(http.DefaultClient, api.WithToken(data.token))
if err != nil {
logger.WithError(err).Debug("Failed to create API client")
return err
}
resp, err := client.Uplinks.Send(objects.DeviceUplinks{
eui: uplink,
})
if err != nil {
logger.WithError(err).Debug("Failed to send uplink upstream")
return err
}
logger.Debug("Uplink sent to the Device Management Service")
response, ok := resp[eui]
if !ok {
return errDeviceEUIMissing.WithAttributes("dev_eui", up.DevEUI)
}
if response.Error != "" {
return errUplinkRequestFailed.WithCause(errors.New(response.Error))
}
downlink := response.Result.Downlink
if downlink == nil {
logger.Debug("No downlink to be scheduled from the Device Management Service")
return nil
}
down := &ttnpb.ApplicationDownlink{
FPort: uint32(downlink.Port),
FRMPayload: []byte(downlink.Payload),
}
err = p.server.DownlinkQueuePush(ctx, assoc.EndDeviceIdentifiers, []*ttnpb.ApplicationDownlink{down})
if err != nil {
logger.WithError(err).Debug("Failed to push downlink to device")
return err
}
logger.Debug("Device Management Service downlink scheduled")
return nil
}
func init() {
p := ttnpb.ApplicationPackage{
Name: "lora-cloud-device-management-v1",
DefaultFPort: 200,
}
packages.RegisterPackage(p, packages.CreateApplicationPackage(
func(server io.Server, registry packages.Registry) packages.ApplicationPackageHandler {
return &DeviceManagementPackage{server, registry}
},
))
}