This adds initial code for vcp plugin which handles Volume Control
Profile and Volume Control Service.
---
Makefile.plugins | 5 +
configure.ac | 4 +
profiles/audio/vcp.c | 312 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 321 insertions(+)
create mode 100644 profiles/audio/vcp.c
diff --git a/Makefile.plugins b/Makefile.plugins
index 213ed99edf2d..a3654980f86d 100644
--- a/Makefile.plugins
+++ b/Makefile.plugins
@@ -121,3 +121,8 @@ if BAP
builtin_modules += bap
builtin_sources += profiles/audio/bap.c
endif
+
+if VCP
+builtin_modules += vcp
+builtin_sources += profiles/audio/vcp.c
+endif
diff --git a/configure.ac b/configure.ac
index 1f76915b4349..79645e6917cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -199,6 +199,10 @@ AC_ARG_ENABLE(bap, AS_HELP_STRING([--disable-bap],
[disable BAP profile]), [enable_bap=${enableval}])
AM_CONDITIONAL(BAP, test "${enable_bap}" != "no")
+AC_ARG_ENABLE(vcp, AS_HELP_STRING([--disable-vcp],
+ [disable VCP profile]), [enable_vcp=${enableval}])
+AM_CONDITIONAL(VCP, test "${enable_vcp}" != "no")
+
AC_ARG_ENABLE(tools, AS_HELP_STRING([--disable-tools],
[disable Bluetooth tools]), [enable_tools=${enableval}])
AM_CONDITIONAL(TOOLS, test "${enable_tools}" != "no")
diff --git a/profiles/audio/vcp.c b/profiles/audio/vcp.c
new file mode 100644
index 000000000000..34950d4070f2
--- /dev/null
+++ b/profiles/audio/vcp.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2022 Intel Corporation. All rights reserved.
+ *
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <glib.h>
+
+#include "gdbus/gdbus.h"
+
+#include "lib/bluetooth.h"
+#include "lib/hci.h"
+#include "lib/sdp.h"
+#include "lib/uuid.h"
+
+#include "src/dbus-common.h"
+#include "src/shared/util.h"
+#include "src/shared/att.h"
+#include "src/shared/queue.h"
+#include "src/shared/gatt-db.h"
+#include "src/shared/gatt-client.h"
+#include "src/shared/gatt-server.h"
+#include "src/shared/vcp.h"
+
+#include "btio/btio.h"
+#include "src/plugin.h"
+#include "src/adapter.h"
+#include "src/gatt-database.h"
+#include "src/device.h"
+#include "src/profile.h"
+#include "src/service.h"
+#include "src/log.h"
+#include "src/error.h"
+
+#define VCS_UUID_STR "00001844-0000-1000-8000-00805f9b34fb"
+#define MEDIA_ENDPOINT_INTERFACE "org.bluez.MediaEndpoint1"
+
+struct vcp_data {
+ struct btd_device *device;
+ struct btd_service *service;
+ struct bt_vcp *vcp;
+};
+
+static struct queue *sessions;
+
+static int vcp_disconnect(struct btd_service *service)
+{
+ DBG("");
+ return 0;
+}
+
+static struct vcp_data *vcp_data_new(struct btd_device *device)
+{
+ struct vcp_data *data;
+
+ data = new0(struct vcp_data, 1);
+ data->device = device;
+
+ return data;
+}
+
+static void vcp_data_add(struct vcp_data *data)
+{
+ DBG("data %p", data);
+
+ if (queue_find(sessions, NULL, data)) {
+ error("data %p already added", data);
+ return;
+ }
+
+ if (!sessions)
+ sessions = queue_new();
+
+ queue_push_tail(sessions, data);
+
+ if (data->service)
+ btd_service_set_user_data(data->service, data);
+}
+
+static bool match_data(const void *data, const void *match_data)
+{
+ const struct vcp_data *vdata = data;
+ const struct bt_vcp *vcp = match_data;
+
+ return vdata->vcp == vcp;
+}
+
+static void vcp_data_free(struct vcp_data *data)
+{
+ if (data->service) {
+ btd_service_set_user_data(data->service, NULL);
+ bt_vcp_set_user_data(data->vcp, NULL);
+ }
+
+ bt_vcp_unref(data->vcp);
+ free(data);
+}
+
+static void vcp_data_remove(struct vcp_data *data)
+{
+ DBG("data %p", data);
+
+ if (!queue_remove(sessions, data))
+ return;
+
+ vcp_data_free(data);
+
+ if (queue_isempty(sessions)) {
+ queue_destroy(sessions, NULL);
+ sessions = NULL;
+ }
+}
+
+static void vcp_detached(struct bt_vcp *vcp, void *user_data)
+{
+ struct vcp_data *data;
+
+ DBG("%p", vcp);
+
+ data = queue_find(sessions, match_data, vcp);
+ if (!data) {
+ error("Unable to find vcp session");
+ return;
+ }
+
+ vcp_data_remove(data);
+}
+
+static void vcp_attached(struct bt_vcp *vcp, void *user_data)
+{
+ struct vcp_data *data;
+ struct bt_att *att;
+ struct btd_device *device;
+
+ DBG("%p", vcp);
+
+ data = queue_find(sessions, match_data, vcp);
+ if (data)
+ return;
+
+ att = bt_vcp_get_att(vcp);
+ if (!att)
+ return;
+
+ device = btd_adapter_find_device_by_fd(bt_att_get_fd(att));
+ if (!device) {
+ error("Unable to find device");
+ return;
+ }
+
+ data = vcp_data_new(device);
+ data->vcp = vcp;
+
+ vcp_data_add(data);
+
+}
+
+static int vcp_probe(struct btd_service *service)
+{
+ struct btd_device *device = btd_service_get_device(service);
+ struct btd_adapter *adapter = device_get_adapter(device);
+ struct btd_gatt_database *database = btd_adapter_get_database(adapter);
+ struct vcp_data *data = btd_service_get_user_data(service);
+ char addr[18];
+
+ ba2str(device_get_address(device), addr);
+ DBG("%s", addr);
+
+ /* Ignore, if we were probed for this device already */
+ if (data) {
+ error("Profile probed twice for the same device!");
+ return -EINVAL;
+ }
+
+ data = vcp_data_new(device);
+ data->service = service;
+
+ data->vcp = bt_vcp_new(btd_gatt_database_get_db(database),
+ btd_device_get_gatt_db(device));
+ if (!data->vcp) {
+ error("Unable to create VCP instance");
+ free(data);
+ return -EINVAL;
+ }
+
+ vcp_data_add(data);
+
+ bt_vcp_set_user_data(data->vcp, service);
+
+ return 0;
+}
+
+static void vcp_remove(struct btd_service *service)
+{
+ struct btd_device *device = btd_service_get_device(service);
+ struct vcp_data *data;
+ char addr[18];
+
+ ba2str(device_get_address(device), addr);
+ DBG("%s", addr);
+
+ data = btd_service_get_user_data(service);
+ if (!data) {
+ error("VCP service not handled by profile");
+ return;
+ }
+
+ vcp_data_remove(data);
+}
+
+static int vcp_accept(struct btd_service *service)
+{
+ struct btd_device *device = btd_service_get_device(service);
+ struct bt_gatt_client *client = btd_device_get_gatt_client(device);
+ struct vcp_data *data = btd_service_get_user_data(service);
+ char addr[18];
+
+ ba2str(device_get_address(device), addr);
+ DBG("%s", addr);
+
+ if (!data) {
+ error("VCP service not handled by profile");
+ return -EINVAL;
+ }
+
+ if (!bt_vcp_attach(data->vcp, client)) {
+ error("VCP unable to attach");
+ return -EINVAL;
+ }
+
+ btd_service_connecting_complete(service, 0);
+
+ return 0;
+}
+
+static int vcp_server_probe(struct btd_profile *p,
+ struct btd_adapter *adapter)
+{
+ struct btd_gatt_database *database = btd_adapter_get_database(adapter);
+
+ DBG("VCP path %s", adapter_get_path(adapter));
+
+ bt_vcp_add_db(btd_gatt_database_get_db(database));
+
+ return 0;
+}
+
+static void vcp_server_remove(struct btd_profile *p,
+ struct btd_adapter *adapter)
+{
+ DBG("VCP remove Adapter");
+}
+
+static struct btd_profile vcp_profile = {
+ .name = "vcp",
+ .priority = BTD_PROFILE_PRIORITY_MEDIUM,
+ .remote_uuid = VCS_UUID_STR,
+
+ .device_probe = vcp_probe,
+ .device_remove = vcp_remove,
+
+ .accept = vcp_accept,
+ .disconnect = vcp_disconnect,
+
+ .adapter_probe = vcp_server_probe,
+ .adapter_remove = vcp_server_remove,
+};
+
+static unsigned int vcp_id = 0;
+
+static int vcp_init(void)
+{
+ if (!(g_dbus_get_flags() & G_DBUS_FLAG_ENABLE_EXPERIMENTAL)) {
+ warn("D-Bus experimental not enabled");
+ return -ENOTSUP;
+ }
+
+ btd_profile_register(&vcp_profile);
+ vcp_id = bt_vcp_register(vcp_attached, vcp_detached, NULL);
+
+ return 0;
+}
+
+static void vcp_exit(void)
+{
+ if (g_dbus_get_flags() & G_DBUS_FLAG_ENABLE_EXPERIMENTAL) {
+ btd_profile_unregister(&vcp_profile);
+ bt_vcp_unregister(vcp_id);
+ }
+}
+
+BLUETOOTH_PLUGIN_DEFINE(vcp, VERSION, BLUETOOTH_PLUGIN_PRIORITY_DEFAULT,
+ vcp_init, vcp_exit)
--
2.25.1
