Hi Claudio / Vinicius,

On 02/19/2013 02:44 PM, Claudio Takahasi wrote:
> From: Vinicius Costa Gomes<vinicius.gomes@openbossa.org>
>
> This patch checks if the Handsfree Audio Manager already has an agent
> registered for the same owner and object path.
> ---
>   plugins/hfp_audio.c | 41 ++++++++++++++++++++++++++++++++++++++++-
>   1 file changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/plugins/hfp_audio.c b/plugins/hfp_audio.c
> index db21a5d..32ddebc 100644
> --- a/plugins/hfp_audio.c
> +++ b/plugins/hfp_audio.c
> @@ -25,6 +25,7 @@
>
>   #include<errno.h>
>   #include<stdio.h>
> +#include<string.h>
>
>   #include<gdbus.h>
>
> @@ -35,12 +36,34 @@
>
>   #define HFP_AUDIO_MANAGER_INTERFACE		OFONO_SERVICE ".HandsfreeAudioManager"
>
> +struct agent {
> +	char *owner;
> +	char *path;
> +	unsigned char *codecs;
> +	int codecs_len;
> +};
> +
>   /* Supported agents codecs */
>   enum hfp_codec {
>   	HFP_CODEC_CVSD = 0x01,
>   	HFP_CODEC_MSBC = 0x02,
>   };
>
> +static GSList *agents = NULL;
> +
> +static int agent_cmp(gconstpointer a, gconstpointer b)
> +{
> +	const struct agent *agent = a;
> +	const struct agent *match = b;
> +	int ret;
> +
> +	ret = strcmp(agent->owner, match->owner);
> +	if (ret != 0)
> +		return ret;
> +
> +	return strcmp(agent->path, match->path);
> +}
> +
>   static DBusMessage *am_get_cards(DBusConnection *conn,
>   					DBusMessage *msg, void *user_data)
>   {
> @@ -52,11 +75,14 @@ static DBusMessage *am_get_cards(DBusConnection *conn,
>   static DBusMessage *am_agent_register(DBusConnection *conn,
>   					DBusMessage *msg, void *user_data)
>   {
> -	const char *path;
> +	struct agent match, *agent;
> +	const char *sender, *path;
>   	unsigned char *codecs;
>   	DBusMessageIter iter, array;
>   	int length, i;
>
> +	sender = dbus_message_get_sender(msg);
> +
>   	if (dbus_message_iter_init(msg,&iter) == FALSE)
>   		goto invalid_args;
>
> @@ -75,6 +101,19 @@ static DBusMessage *am_agent_register(DBusConnection *conn,
>   			goto invalid_args;
>   	}
>
> +	match.owner = (char *) sender;
> +	match.path = (char *) path;
> +	if (g_slist_find_custom(agents,&match, agent_cmp))
> +		goto invalid_args;
> +
> +	agent = g_new0(struct agent, 1);
> +	agent->owner = g_strdup(sender);
> +	agent->path = g_strdup(path);
> +	agent->codecs = g_memdup(codecs, length);
> +	agent->codecs_len = length;
> +
> +	agents = g_slist_prepend(agents, agent);
> +

How do you plan on using multiple agents?  Unless there is dire need, I 
suggest only allowing 1 agent to be registered at a time.

>   	return dbus_message_new_method_return(msg);
>
>   invalid_args:

Regards,
-Denis