Re: [PATCH BlueZ 1/3] Add SetRemoteProperties method for OOB COD setting

[Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxxxxxx>]

Hi Bartosz,

On 13:14 Thu 11 Aug, Bartosz Szatkowski wrote:
> Add method for suppling class of device through OOB mechanism, to be
> available at pairing phase. At this point it may be presented to the
> user, by agent, in confirmation request (or whatever).
> ---
>  doc/oob-api.txt   |   13 ++++
>  plugins/dbusoob.c |  170 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 183 insertions(+), 0 deletions(-)
> 
> diff --git a/doc/oob-api.txt b/doc/oob-api.txt
> index d838712..0324758 100644
> --- a/doc/oob-api.txt
> +++ b/doc/oob-api.txt
> @@ -36,3 +36,16 @@ Methods		array{byte} hash, array{byte} randomizer ReadLocalData()
>  
>  			Possible errors: org.bluez.Error.Failed
>  					 org.bluez.Error.InvalidArguments
> +
> +		void SetRemoteProperties(string address, dict data)
> +
> +			This method set new properties for device with specified
> +			address, to be used when device is created.
> +			On success DeviceFound signal will be emitted.
> +
> +			Currently supported keys:
> +
> +				Class		uint32
> +
> +			Possible errors: org.bluez.Error.Failed
> +					 org.bluez.Error.InvalidArguments
> diff --git a/plugins/dbusoob.c b/plugins/dbusoob.c
> index 2c03780..ca0c635 100644
> --- a/plugins/dbusoob.c
> +++ b/plugins/dbusoob.c
> @@ -43,6 +43,7 @@
>  #include "event.h"
>  #include "error.h"
>  #include "oob.h"
> +#include "storage.h"
>  
>  #define OOB_INTERFACE	"org.bluez.OutOfBand"
>  
> @@ -51,6 +52,13 @@ struct oob_request {
>  	DBusMessage *msg;
>  };
>  
> +struct oob_remote_parameters {
> +	bdaddr_t local;
> +	bdaddr_t peer;
> +	const char *address;
> +	uint32_t class;
> +};
> +
>  static GSList *oob_requests = NULL;
>  static DBusConnection *connection = NULL;
>  
> @@ -153,6 +161,167 @@ static DBusMessage *add_remote_data(DBusConnection *conn, DBusMessage *msg,
>  	return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
>  }
>  
> +static void emit_device_found(const char *path,
> +				struct oob_remote_parameters *params)
> +{
> +	DBusMessage *signal;
> +	DBusMessageIter iter, dict;
> +
> +	signal = dbus_message_new_signal(path, ADAPTER_INTERFACE,
> +								"DeviceFound");
> +	if (signal == NULL) {
> +		error("Unable to allocate new %s.DeviceFound signal",
> +							ADAPTER_INTERFACE);
> +		return;
> +	}
> +
> +	dbus_message_iter_init_append(signal, &iter);
> +	dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING,
> +							&params->address);
> +
> +	dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
> +			DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
> +			DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
> +			DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
> +
> +	if (params->class != 0)
> +		dict_append_entry(&dict, "Class", DBUS_TYPE_UINT32,
> +							&params->class);
> +
> +	dbus_message_iter_close_container(&iter, &dict);
> +
> +	g_dbus_send_message(connection, signal);
> +}
> +
> +static DBusMessage *parse_class(DBusMessageIter *value,
> +			struct oob_remote_parameters *params, DBusMessage *msg)
> +{
> +	if (dbus_message_iter_get_arg_type(value) != DBUS_TYPE_UINT32)
> +		return btd_error_invalid_args(msg);
> +
> +	dbus_message_iter_get_basic(value, &params->class);
> +
> +	return NULL;
> +}
> +
> +static gboolean set_class(struct oob_remote_parameters *params)
> +{
> +	if (params->class == 0)
> +		return FALSE;
> +
> +	if (write_remote_class(&params->local, &params->peer,
> +							params->class) < 0) {
> +		error("Setting device class failed");
> +
> +		return FALSE;
> +	}
> +
> +	return TRUE;
> +}
> +
> +static DBusMessage *parse_property(const char *property,
> +				DBusMessageIter *value, DBusMessage *msg,
> +				struct oob_remote_parameters *params)
> +{
> +	if (g_str_equal("Class", property))
> +		return parse_class(value, params, msg);
> +
> +	return NULL;
> +}
> +
> +static void set_properties(struct btd_adapter *adapter, DBusMessage *msg,
> +				struct oob_remote_parameters *params)
> +{

Why is DBusMessage needed here?

> +	gboolean device_found = FALSE;
> +
> +	if (set_class(params))
> +		device_found = TRUE;
> +
> +	if (device_found)
> +		emit_device_found(adapter_get_path(adapter), params);
> +}
> +
> +static DBusMessage *set_remote_properties(DBusConnection *conn,
> +						DBusMessage *msg, void *data)
> +{
> +	struct btd_adapter *adapter = data;
> +	DBusMessageIter iter_msg, iter_dict, iter_entry, iter_variant;
> +	struct oob_remote_parameters *params;
> +	char *addr;
> +	DBusMessage *result;
> +
> +	if (!dbus_message_iter_init(msg, &iter_msg))
> +		return btd_error_invalid_args(msg);
> +
> +	if (dbus_message_iter_get_arg_type(&iter_msg) != DBUS_TYPE_STRING)
> +		return btd_error_invalid_args(msg);
> +
> +	dbus_message_iter_get_basic(&iter_msg, &addr);
> +
> +	if (bachk(addr))
> +		return btd_error_invalid_args(msg);
> +
> +	dbus_message_iter_get_basic(&iter_msg, &addr);

I may be missing something obvious here, but this loooks uneeded. You are
doing the same thing you did a few lines above.

> +	dbus_message_iter_next(&iter_msg);
> +
> +	if (dbus_message_iter_get_arg_type(&iter_msg) != DBUS_TYPE_ARRAY)
> +		return btd_error_invalid_args(msg);
> +
> +	params = g_new0(struct oob_remote_parameters, 1);
> +
> +	params->address = addr;
> +	adapter_get_address(adapter, &params->local);
> +	str2ba(addr, &params->peer);
> +
> +	dbus_message_iter_recurse(&iter_msg, &iter_dict);
> +
> +	for (; dbus_message_iter_get_arg_type(&iter_dict) != DBUS_TYPE_INVALID;
> +					dbus_message_iter_next(&iter_dict)) {
> +		char *property;
> +
> +		if (dbus_message_iter_get_arg_type(&iter_dict) !=
> +							DBUS_TYPE_DICT_ENTRY) {
> +			result = btd_error_invalid_args(msg);
> +
> +			goto done;
> +		}
> +
> +		dbus_message_iter_recurse(&iter_dict, &iter_entry);
> +
> +		if (dbus_message_iter_get_arg_type(&iter_entry) !=
> +							DBUS_TYPE_STRING) {
> +			result = btd_error_invalid_args(msg);
> +
> +			goto done;
> +		}
> +
> +		dbus_message_iter_get_basic(&iter_entry, &property);
> +		dbus_message_iter_next(&iter_entry);
> +
> +		if (dbus_message_iter_get_arg_type(&iter_entry) !=
> +							DBUS_TYPE_VARIANT) {
> +			result = btd_error_invalid_args(msg);
> +
> +			goto done;
> +		}
> +
> +		dbus_message_iter_recurse(&iter_entry, &iter_variant);
> +
> +		result = parse_property(property, &iter_variant, msg, params);
> +		if (result != NULL)
> +			goto done;
> +	}
> +
> +	set_properties(adapter, msg, params);
> +
> +	result = g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
> +
> +done:
> +	g_free(params);
> +
> +	return result;
> +}
> +
>  static DBusMessage *remove_remote_data(DBusConnection *conn, DBusMessage *msg,
>  								void *data)
>  {
> @@ -177,6 +346,7 @@ static DBusMessage *remove_remote_data(DBusConnection *conn, DBusMessage *msg,
>  
>  static GDBusMethodTable oob_methods[] = {
>  	{"AddRemoteData",	"sayay",	"",	add_remote_data},
> +	{"SetRemoteProperties",	"sa{sv}",	"",	set_remote_properties},
>  	{"RemoveRemoteData",	"s",		"",	remove_remote_data},
>  	{"ReadLocalData",	"",		"ayay",	read_local_data,
>  						G_DBUS_METHOD_FLAG_ASYNC},
> -- 
> 1.7.4.1
> 
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Cheers,
-- 
Vinicius
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