[RFC v2 09/12] profiles: Add initial code for csip plugin

Luiz Augusto von Dentz
2023-03-07T22:26:06Z

From: Sathish Narasimman <sathish.narasimman@intel.com>

This adds initial code for csip plugin which handles Coordinated
set identification Profile and Coordinated Set Identification
Service.
---
Makefile.plugins | 5 +
configure.ac | 4 +
profiles/audio/csip.c | 363 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 372 insertions(+)
create mode 100644 profiles/audio/csip.c

diff --git a/Makefile.plugins b/Makefile.plugins
index 20cac384ef44..0f119e8714b7 100644
--- a/Makefile.plugins
+++ b/Makefile.plugins
@@ -131,3 +131,8 @@ if VCP
builtin_modules += vcp
builtin_sources += profiles/audio/vcp.c
endif
+
+if CSIP
+builtin_modules += csip
+builtin_sources += profiles/audio/csip.c
+endif
diff --git a/configure.ac b/configure.ac
index 515cdf1461eb..6f890110f554 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,6 +207,10 @@ 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(csip, AS_HELP_STRING([--disable-csip],
+ [disable CSIP profile]), [enable_csip=${enableval}])
+AM_CONDITIONAL(CSIP, test "${enable_csip}" != "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/csip.c b/profiles/audio/csip.c
new file mode 100644
index 000000000000..c273c02b8e76
--- /dev/null
+++ b/profiles/audio/csip.c
@@ -0,0 +1,363 @@
+// 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/csip.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"
+#include "src/btd.h"
+
+#define CSIS_UUID_STR "00001846-0000-1000-8000-00805f9b34fb"
+
+struct csip_data {
+ struct btd_device *device;
+ struct btd_service *service;
+ struct bt_csip *csip;
+ unsigned int ready_id;
+};
+
+static struct queue *sessions;
+
+static void csip_debug(const char *str, void *user_data)
+{
+ DBG_IDX(0xffff, "%s", str);
+}
+
+static struct csip_data *csip_data_new(struct btd_device *device)
+{
+ struct csip_data *data;
+
+ data = new0(struct csip_data, 1);
+ data->device = device;
+
+ return data;
+}
+
+static bool csip_ltk_read(struct bt_csip *csip, uint8_t k[16], void *user_data)
+{
+ /* TODO: Retrieve LTK using device object */
+ return false;
+}
+
+static void csip_data_add(struct csip_data *data)
+{
+ DBG("data %p", data);
+
+ if (queue_find(sessions, NULL, data)) {
+ error("data %p already added", data);
+ return;
+ }
+
+ bt_csip_set_debug(data->csip, csip_debug, NULL, NULL);
+
+ bt_csip_set_sirk(data->csip, btd_opts.csis.encrypt, btd_opts.csis.sirk,
+ btd_opts.csis.size, btd_opts.csis.rank,
+ csip_ltk_read, data);
+
+ if (!sessions)
+ sessions = queue_new();
+
+ queue_push_tail(sessions, data);
+
+ if (data->service)
+ btd_service_set_user_data(data->service, data);
+}
+
+static int csip_disconnect(struct btd_service *service)
+{
+ struct csip_data *data = btd_service_get_user_data(service);
+
+ bt_csip_detach(data->csip);
+
+ btd_service_disconnecting_complete(service, 0);
+
+ return 0;
+}
+
+static bool match_data(const void *data, const void *match_data)
+{
+ const struct csip_data *vdata = data;
+ const struct bt_csip *csip = match_data;
+
+ return vdata->csip == csip;
+}
+
+static void csip_data_free(struct csip_data *data)
+{
+ if (data->service) {
+ btd_service_set_user_data(data->service, NULL);
+ bt_csip_set_user_data(data->csip, NULL);
+ }
+
+ bt_csip_ready_unregister(data->csip, data->ready_id);
+ bt_csip_unref(data->csip);
+ free(data);
+}
+
+static void csip_data_remove(struct csip_data *data)
+{
+ DBG("data %p", data);
+
+ if (!queue_remove(sessions, data))
+ return;
+
+ csip_data_free(data);
+
+ if (queue_isempty(sessions)) {
+ queue_destroy(sessions, NULL);
+ sessions = NULL;
+ }
+}
+
+static void csip_detached(struct bt_csip *csip, void *user_data)
+{
+ struct csip_data *data;
+
+ DBG("%p", csip);
+
+ data = queue_find(sessions, match_data, csip);
+ if (!data) {
+ error("Unable to find csip session");
+ return;
+ }
+
+ /* If there is a service it means there is CSIS thus we can keep
+ * instance allocated.
+ */
+ if (data->service)
+ return;
+
+ csip_data_remove(data);
+}
+
+static void csip_attached(struct bt_csip *csip, void *user_data)
+{
+ struct csip_data *data;
+ struct bt_att *att;
+ struct btd_device *device;
+
+ DBG("%p", csip);
+
+ data = queue_find(sessions, match_data, csip);
+ if (data)
+ return;
+
+ att = bt_csip_get_att(csip);
+ if (!att)
+ return;
+
+ device = btd_adapter_find_device_by_fd(bt_att_get_fd(att));
+ if (!device) {
+ error("Unable to find device");
+ return;
+ }
+
+ data = csip_data_new(device);
+ data->csip = csip;
+
+ csip_data_add(data);
+
+}
+
+static int csip_server_probe(struct btd_profile *p,
+ struct btd_adapter *adapter)
+{
+ struct btd_gatt_database *database = btd_adapter_get_database(adapter);
+
+ DBG("CSIP path %s", adapter_get_path(adapter));
+
+ bt_csip_add_db(btd_gatt_database_get_db(database));
+
+ return 0;
+}
+
+static void csip_server_remove(struct btd_profile *p,
+ struct btd_adapter *adapter)
+{
+ DBG("CSIP remove Adapter");
+}
+
+static int csip_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 csip_data *data = btd_service_get_user_data(service);
+ char addr[18];
+
+ ba2str(device_get_address(device), addr);
+ DBG("%s", addr);
+
+ if (!data) {
+ error("CSIP service not handled by profile");
+ return -EINVAL;
+ }
+
+ if (!bt_csip_attach(data->csip, client)) {
+ error("CSIP unable to attach");
+ return -EINVAL;
+ }
+
+ btd_service_connecting_complete(service, 0);
+
+ return 0;
+}
+
+static void csip_ready(struct bt_csip *csip, void *user_data)
+{
+ struct btd_service *service = user_data;
+ struct btd_device *device = btd_service_get_device(service);
+ uint8_t type, size, rank;
+ uint8_t k[16];
+
+ DBG("csip %p", csip);
+
+ if (!bt_csip_get_sirk(csip, &type, k, &size, &rank)) {
+ error("Unable to read SIRK");
+ return;
+ }
+
+ btd_device_add_set(device, type == BT_CSIP_SIRK_ENCRYPT ? true : false,
+ k, size, rank);
+}
+
+static int csip_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 csip_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 = csip_data_new(device);
+ data->service = service;
+
+ data->csip = bt_csip_new(btd_gatt_database_get_db(database),
+ btd_device_get_gatt_db(device));
+ if (!data->csip) {
+ error("Unable to create CSIP instance");
+ free(data);
+ return -EINVAL;
+ }
+
+ csip_data_add(data);
+
+ data->ready_id = bt_csip_ready_register(data->csip, csip_ready, service,
+ NULL);
+
+ bt_csip_set_user_data(data->csip, service);
+
+ return 0;
+}
+
+static void csip_remove(struct btd_service *service)
+{
+ struct btd_device *device = btd_service_get_device(service);
+ struct csip_data *data;
+ char addr[18];
+
+ ba2str(device_get_address(device), addr);
+ DBG("%s", addr);
+
+ data = btd_service_get_user_data(service);
+ if (!data) {
+ error("CSIP service not handled by profile");
+ return;
+ }
+
+ csip_data_remove(data);
+}
+
+static struct btd_profile csip_profile = {
+ .name = "csip",
+ .priority = BTD_PROFILE_PRIORITY_MEDIUM,
+ .remote_uuid = CSIS_UUID_STR,
+
+ .device_probe = csip_probe,
+ .device_remove = csip_remove,
+
+ .accept = csip_accept,
+ .disconnect = csip_disconnect,
+
+ .adapter_probe = csip_server_probe,
+ .adapter_remove = csip_server_remove,
+};
+
+static unsigned int csip_id;
+
+static int csip_init(void)
+{
+ if (!(g_dbus_get_flags() & G_DBUS_FLAG_ENABLE_EXPERIMENTAL)) {
+ warn("D-Bus experimental not enabled");
+ return -ENOTSUP;
+ }
+
+ btd_profile_register(&csip_profile);
+ csip_id = bt_csip_register(csip_attached, csip_detached, NULL);
+
+ return 0;
+}
+
+static void csip_exit(void)
+{
+ if (g_dbus_get_flags() & G_DBUS_FLAG_ENABLE_EXPERIMENTAL) {
+ btd_profile_unregister(&csip_profile);
+ bt_csip_unregister(csip_id);
+ }
+}
+
+BLUETOOTH_PLUGIN_DEFINE(csip, VERSION, BLUETOOTH_PLUGIN_PRIORITY_DEFAULT,
+ csip_init, csip_exit)
--
2.39.2