| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ble |
| |
| import ( |
| "github.com/paypal/gatt" |
| "github.com/paypal/gatt/linux/cmd" |
| ) |
| |
| var ( |
| // These constants are taken from: |
| // https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicsHome.aspx |
| attrDeviceNameUUID = gatt.UUID16(0x2A00) |
| attrAppearanceUUID = gatt.UUID16(0x2A01) |
| attrPeripheralPrivacyUUID = gatt.UUID16(0x2A02) |
| attrReconnectionAddrUUID = gatt.UUID16(0x2A03) |
| attrPreferredParamsUUID = gatt.UUID16(0x2A04) |
| |
| attrServiceChangedUUID = gatt.UUID16(0x2A05) |
| |
| // https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.gap.appearance.xml |
| gapCharAppearanceGenericComputer = []byte{0x00, 0x80} |
| ) |
| |
| func newGapService(name string) *gatt.Service { |
| s := gatt.NewService(attrGAPUUID) |
| s.AddCharacteristic(attrDeviceNameUUID).SetValue([]byte(name)) |
| s.AddCharacteristic(attrAppearanceUUID).SetValue(gapCharAppearanceGenericComputer) |
| // Disable peripheral privacy |
| s.AddCharacteristic(attrPeripheralPrivacyUUID).SetValue([]byte{0x00}) |
| |
| // Make up some value for a required field: |
| // https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicsHome.aspx |
| s.AddCharacteristic(attrReconnectionAddrUUID).SetValue([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}) |
| // Preferred params are: |
| // min connection interval: 0x0006 * 1.25ms (7.5 ms) |
| // max connection interval: 0x0006 * 1.25ms (7.5 ms) |
| // slave latency: 0 |
| // connection supervision timeout multiplier: 0x07d0 (2000) |
| s.AddCharacteristic(attrPreferredParamsUUID).SetValue([]byte{0x06, 0x00, 0x06, 0x00, 0x00, 0x00, 0xd0, 0x07}) |
| return s |
| } |
| |
| func newGattService() *gatt.Service { |
| s := gatt.NewService(attrGATTUUID) |
| s.AddCharacteristic(attrServiceChangedUUID).HandleNotifyFunc( |
| func(r gatt.Request, n gatt.Notifier) {}) |
| return s |
| } |
| |
| var gattOptions = []gatt.Option{ |
| gatt.LnxMaxConnections(1), |
| gatt.LnxDeviceID(-1, true), |
| gatt.LnxSetAdvertisingParameters(&cmd.LESetAdvertisingParameters{ |
| // Set an advertising rate of 150ms. This value is multipled by |
| // 0.625ms to get the actual rate. |
| AdvertisingIntervalMin: 0x00f4, |
| AdvertisingIntervalMax: 0x00f4, |
| AdvertisingChannelMap: 0x7, |
| }), |
| } |
| |
| func addDefaultServices(name string) map[string]*gatt.Service { |
| s1 := newGapService(name) |
| s2 := newGattService() |
| return map[string]*gatt.Service{ |
| s1.UUID().String(): s1, |
| s2.UUID().String(): s2, |
| } |
| } |
