#include <pthread.h>
#include <stdint.h>

#ifndef UDP_ENB_TASK_H_
#define UDP_ENB_TASK_H_
#include "enb_config.h"
#include "intertask_interface_types.h"


/** \brief UDP recv callback prototype. Will be called every time a payload is
 *  received on socket.
 *  \param port Port on which data had been received
 *  \param address Sender Ipv4 address
 *  \param buffer Pointer to data (should be freed by user)
 *  \param length Length of message received
 *  \param arg_p User provided argument (transparent for wrappers)
 *  @returns Execution result
 */
typedef int (*udp_recv_callback)(uint16_t  port,
                                 uint32_t  address,
                                 uint8_t  *buffer,
                                 uint32_t  length,
                                 void     *arg_p);

typedef struct {
    int       sd;              /* Socket descriptor to use */
    pthread_t listener_thread; /* Thread affected to recv */
    char     *local_address;   /* Local ipv4 address to use */
    uint16_t  local_port;      /* Local port to use */
    task_id_t task_id;         /* Task who has requested the new endpoint */
} udp_data_t;

/** \brief Create new datagram connection-less socket and create new thread
 *  for data in downstream.
 *  \param ip_addr Local IPv4 address to use
 *  \param port Local port to use
 *  \param udp_data_p
 *  \param recv_callback Pointer to data (should be freed by user)
 *  \param arg_p Optionnal argument to pass to recv_callback
 *  @returns < 0 on failure or socket descriptor on success
 */
int udp_create_connection(char *ip_addr, uint16_t port,
                          udp_data_t *udp_data_p,
                          udp_recv_callback recv_callback,
                          void *arg_p);

/** \brief Send buffer to remote peer.
 *  \param sd socket descriptor to use
 *  \param port remote port
 *  \param address remote address
 *  \param buffer Data buffer to send
 *  \param length Buffer length
 *  @returns < 0 on failure or socket descriptor on success
 */
int udp_send_to(int sd, uint16_t port, uint32_t address,
                const uint8_t *buffer, uint32_t length);


/** \brief UDP ITTI task on eNB.
 *  \param args_p
 *  @returns always NULL
 */
void *udp_eNB_task(void *args_p);

/** \brief init UDP layer.
 *  \param enb_config_p configuration of eNB
 *  @returns always 0
 */
int udp_enb_init(const Enb_properties_t *enb_config_p);

#endif /* UDP_PRIMITIVES_CLIENT_H_ */