fermentord/vendor/github.com/JuulLabs-OSS/ble/linux/gatt/server.go

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package gatt
import (
"log"
"sync"
"github.com/JuulLabs-OSS/ble"
"github.com/JuulLabs-OSS/ble/linux/att"
)
// NewServerWithName creates a new Server with the specified name
func NewServerWithName(name string) (*Server, error) {
return NewServerWithNameAndHandler(name, nil)
}
// NewServerWithNameAndHandler allow to specify a custom NotifyHandler
func NewServerWithNameAndHandler(name string, notifyHandler ble.NotifyHandler) (*Server, error) {
return &Server{
name: name,
svcs: defaultServicesWithHandler(name, notifyHandler),
db: att.NewDB(defaultServices(name), uint16(1)),
}, nil
}
// NewServer ...
func NewServer() (*Server, error) {
return NewServerWithName("Gopher")
}
// Server ...
type Server struct {
sync.Mutex
name string
svcs []*ble.Service
db *att.DB
}
// AddService ...
func (s *Server) AddService(svc *ble.Service) error {
s.Lock()
defer s.Unlock()
s.svcs = append(s.svcs, svc)
s.db = att.NewDB(s.svcs, uint16(1)) // ble attrs start at 1
return nil
}
// RemoveAllServices ...
func (s *Server) RemoveAllServices() error {
s.Lock()
defer s.Unlock()
s.svcs = defaultServices(s.name)
s.db = att.NewDB(s.svcs, uint16(1)) // ble attrs start at 1
return nil
}
// SetServices ...
func (s *Server) SetServices(svcs []*ble.Service) error {
s.Lock()
defer s.Unlock()
s.svcs = append(defaultServices(s.name), svcs...)
s.db = att.NewDB(s.svcs, uint16(1)) // ble attrs start at 1
return nil
}
// DB ...
func (s *Server) DB() *att.DB {
return s.db
}
func defaultServices(name string) []*ble.Service {
return defaultServicesWithHandler(name, nil)
}
func defaultServicesWithHandler(name string, handler ble.NotifyHandler) []*ble.Service {
// https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.ble.appearance.xml
var gapCharAppearanceGenericComputer = []byte{0x00, 0x80}
gapSvc := ble.NewService(ble.GAPUUID)
gapSvc.NewCharacteristic(ble.DeviceNameUUID).SetValue([]byte(name))
gapSvc.NewCharacteristic(ble.AppearanceUUID).SetValue(gapCharAppearanceGenericComputer)
gapSvc.NewCharacteristic(ble.PeripheralPrivacyUUID).SetValue([]byte{0x00})
gapSvc.NewCharacteristic(ble.ReconnectionAddrUUID).SetValue([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
gapSvc.NewCharacteristic(ble.PeferredParamsUUID).SetValue([]byte{0x06, 0x00, 0x06, 0x00, 0x00, 0x00, 0xd0, 0x07})
gattSvc := ble.NewService(ble.GATTUUID)
var indicationHandler ble.NotifyHandlerFunc
indicationHandler = defaultHanderFunc
if handler != nil {
indicationHandler = handler.ServeNotify
}
gattSvc.NewCharacteristic(ble.ServiceChangedUUID).HandleIndicate(indicationHandler)
return []*ble.Service{gapSvc, gattSvc}
}
func defaultHanderFunc(r ble.Request, n ble.Notifier) {
log.Printf("TODO: indicate client when the services are changed")
for {
select {
case <-n.Context().Done():
log.Printf("count: Notification unsubscribed")
return
}
}
}