[PATCH v2] profiles/audio/ccp: Add initial code for ccp plugin

[Shahid Vichhi <shahid.bashir.vichhi@intel.com>]

This adds initial code for ccp plugin which handle call control profile and
Telephone Bearer Services and Generic Telephone Bearer Services for
client role.
---
 Makefile.plugins     |   5 +
 configure.ac         |   4 +
 profiles/audio/ccp.c | 238 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 247 insertions(+)
 create mode 100644 profiles/audio/ccp.c

diff --git a/Makefile.plugins b/Makefile.plugins
index e960eedeabd3..4aa2c9c92854 100644
--- a/Makefile.plugins
+++ b/Makefile.plugins
@@ -138,6 +138,11 @@ builtin_modules += micp
 builtin_sources += profiles/audio/micp.c
 endif
 
+if CCP
+builtin_modules += ccp
+builtin_sources += profiles/audio/ccp.c
+endif
+
 if CSIP
 builtin_modules += csip
 builtin_sources += profiles/audio/csip.c
diff --git a/configure.ac b/configure.ac
index 70e9d4be8127..c7dadf79a565 100644
--- a/configure.ac
+++ b/configure.ac
@@ -200,6 +200,10 @@ AC_ARG_ENABLE(mcp, AS_HELP_STRING([--disable-mcp],
         [disable MCP profile]), [enable_mcp=${enableval}])
 AM_CONDITIONAL(MCP, test "${enable_mcp}" != "no")
 
+AC_ARG_ENABLE(ccp, AS_HELP_STRING([--disable-ccp],
+        [disable CCP profile]), [enable_ccp=${enableval}])
+AM_CONDITIONAL(CCP, test "${enable_ccp}" != "no")
+
 AC_ARG_ENABLE(vcp, AS_HELP_STRING([--disable-vcp],
 		[disable VCP profile]), [enable_vcp=${enableval}])
 AM_CONDITIONAL(VCP, test "${enable_vcp}" != "no")
diff --git a/profiles/audio/ccp.c b/profiles/audio/ccp.c
new file mode 100644
index 000000000000..fe97911e75f4
--- /dev/null
+++ b/profiles/audio/ccp.c
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2024  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 <string.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/ccp.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 GTBS_UUID_STR "0000184C-0000-1000-8000-00805f9b34fb"
+
+struct ccp_data {
+	struct btd_device *device;
+	struct btd_service *service;
+	struct bt_ccp *ccp;
+	unsigned int state_id;
+};
+
+static void ccp_debug(const char *str, void *user_data)
+{
+	DBG_IDX(0xffff, "%s", str);
+}
+
+static struct ccp_data *ccp_data_new(struct btd_device *device)
+{
+	struct ccp_data *data;
+
+	data = new0(struct ccp_data, 1);
+	data->device = device;
+
+	return data;
+}
+
+static int ccp_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 ccp_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 = ccp_data_new(device);
+	data->service = service;
+
+	data->ccp = bt_ccp_new(btd_gatt_database_get_db(database),
+			       btd_device_get_gatt_db(device));
+
+	bt_ccp_set_debug(data->ccp, ccp_debug, NULL, NULL);
+	btd_service_set_user_data(service, data);
+
+	return 0;
+}
+
+static void ccp_data_free(struct ccp_data *data)
+{
+	if (data->service) {
+		btd_service_set_user_data(data->service, NULL);
+		bt_ccp_set_user_data(data->ccp, NULL);
+	}
+
+	bt_ccp_unref(data->ccp);
+	free(data);
+}
+
+static void ccp_data_remove(struct ccp_data *data)
+{
+	DBG("data %p", data);
+
+	ccp_data_free(data);
+}
+
+static void ccp_remove(struct btd_service *service)
+{
+	struct btd_device *device = btd_service_get_device(service);
+	struct ccp_data *data;
+	char addr[18];
+
+	ba2str(device_get_address(device), addr);
+	DBG("%s", addr);
+
+	data = btd_service_get_user_data(service);
+	if (!data) {
+		error("CCP service not handled by profile");
+		return;
+	}
+
+	ccp_data_remove(data);
+}
+
+static int ccp_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 ccp_data *data = btd_service_get_user_data(service);
+	char addr[18];
+
+	ba2str(device_get_address(device), addr);
+	DBG("%s", addr);
+
+	if (!bt_ccp_attach(data->ccp, client)) {
+		error("VCP unable to attach");
+		return -EINVAL;
+	}
+
+	/*TODO: register telephony operations here*/
+
+	btd_service_connecting_complete(service, 0);
+
+	return 0;
+}
+
+static int ccp_connect(struct btd_service *service)
+{
+	struct btd_device *device = btd_service_get_device(service);
+	char addr[18];
+
+	ba2str(device_get_address(device), addr);
+	DBG("%s", addr);
+
+	return 0;
+}
+
+static int ccp_disconnect(struct btd_service *service)
+{
+	struct btd_device *device = btd_service_get_device(service);
+	struct ccp_data *data = btd_service_get_user_data(service);
+	char addr[18];
+
+	ba2str(device_get_address(device), addr);
+	DBG("%s", addr);
+
+	bt_ccp_detach(data->ccp);
+
+	btd_service_disconnecting_complete(service, 0);
+
+	return 0;
+}
+
+static int
+ccp_server_probe(struct btd_profile *p,
+		 struct btd_adapter *adapter)
+{
+	struct btd_gatt_database *database = btd_adapter_get_database(adapter);
+
+	bt_ccp_register(btd_gatt_database_get_db(database));
+
+	return 0;
+}
+
+static void
+ccp_server_remove(struct btd_profile *p,
+		  struct btd_adapter *adapter)
+{
+	DBG("CCP remove Adapter");
+}
+
+static struct btd_profile ccp_profile = {
+	.name			= "ccp",
+	.priority		= BTD_PROFILE_PRIORITY_MEDIUM,
+	.remote_uuid	= GTBS_UUID_STR,
+	.device_probe	= ccp_probe,
+	.device_remove	= ccp_remove,
+	.accept			= ccp_accept,
+	.connect		= ccp_connect,
+	.disconnect		= ccp_disconnect,
+
+	.adapter_probe	= ccp_server_probe,
+	.adapter_remove = ccp_server_remove,
+
+	.experimental	= true,
+};
+
+static int ccp_init(void)
+{
+	return btd_profile_register(&ccp_profile);
+}
+
+static void ccp_exit(void)
+{
+	btd_profile_unregister(&ccp_profile);
+}
+
+BLUETOOTH_PLUGIN_DEFINE(ccp, VERSION, BLUETOOTH_PLUGIN_PRIORITY_DEFAULT,
+			ccp_init, ccp_exit)
-- 
2.34.1