#ifndef LIBNETHOGS_H_
#define LIBNETHOGS_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdbool.h>

#define NETHOGS_DSO_VISIBLE __attribute__ ((visibility ("default")))
#define NETHOGS_DSO_HIDDEN  __attribute__ ((visibility ("hidden")))

#define NETHOGS_APP_ACTION_SET	  1
#define NETHOGS_APP_ACTION_REMOVE 2

#define NETHOGS_STATUS_OK         0 
#define NETHOGS_STATUS_FAILURE    1 //generic error
#define NETHOGS_STATUS_NO_DEVICE  2 //no device foundr

typedef struct NethogsMonitorUpdate
{
	const char* name;
	int 		pid;
	uint32_t	uid;
	const char* device_name;
	uint32_t	sent_bytes;
	uint32_t	recv_bytes;
	float		sent_kbs;
	float		recv_kbs;
} NethogsMonitorUpdate;


/**
 * @brief Defines a callback to handle updates about applications
 * @param action NETHOGS_APP_ACTION_SET if data is beeing added or updated,
 *        NETHOGS_APP_ACTION_REMOVE if data is beeing removed.
 *        the 'data' pointer is used to uniquely identify the data beeing update or removed.
 * @param data a pointer to an application usage data. the pointer remains valid until
 *        the callback is called with NETHOGS_APP_ACTION_REMOVE for the same pointer.
 *        the user should not modify the content of the structure pointed by data.
 */
typedef void(*NethogsMonitorCallback)(int action, NethogsMonitorUpdate const* data);
		
/**
 * @brief Enter the process monitoring loop and reports updates using the 
 * callback provided as parameter.
 * This call will block until nethogsmonitor_breakloop() is called or a failure occurs.
 * @param cb A pointer to a callback function following the NethogsMonitorCallback definition
 */

NETHOGS_DSO_VISIBLE int nethogsmonitor_loop(NethogsMonitorCallback cb);

/**
 * @brief Makes the call to nethogsmonitor_loop return.
 */
NETHOGS_DSO_VISIBLE void nethogsmonitor_breakloop();

#undef NETHOGS_DSO_VISIBLE
#undef NETHOGS_DSO_HIDDEN

#ifdef __cplusplus
}
#endif

#endif // LIBNETHOGS_H_