/******************************************************************************

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******************************************************************************/

/*!
*  @file    librmnetctl.h
*  @brief   rmnet control API's header file
*/

#ifndef LIBRMNETCTL_H
#define LIBRMNETCTL_H

/* RMNET API succeeded */
#define RMNETCTL_SUCCESS 0
/* RMNET API encountered an error while executing within the library. Check the
* error code in this case */
#define RMNETCTL_LIB_ERR 1
/* RMNET API encountered an error while executing in the kernel. Check the
* error code in this case */
#define RMNETCTL_KERNEL_ERR 2
/* RMNET API encountered an error because of invalid arguments*/
#define RMNETCTL_INVALID_ARG 3

/* Flag to associate a network device*/
#define RMNETCTL_DEVICE_ASSOCIATE 1
/* Flag to unassociate a network device*/
#define RMNETCTL_DEVICE_UNASSOCIATE 0
/* Flag to create a new virtual network device*/
#define RMNETCTL_NEW_VND 1
/* Flag to free a new virtual network device*/
#define RMNETCTL_FREE_VND 0
/* Flag to add a new flow*/
#define RMNETCTL_ADD_FLOW 1
/* Flag to delete an existing flow*/
#define RMNETCTL_DEL_FLOW 0

enum rmnetctl_error_codes_e {
	/* API succeeded. This should always be the first element. */
	RMNETCTL_API_SUCCESS,

	RMNETCTL_API_FIRST_ERR,
	/* API failed because not enough memory to create buffer to send
	 * message */
	RMNETCTL_API_ERR_REQUEST_INVALID = RMNETCTL_API_FIRST_ERR,
	/* API failed because not enough memory to create buffer for the
	 *  response message */
	RMNETCTL_API_ERR_RESPONSE_INVALID,
	/* API failed because could not send the message to kernel */
	RMNETCTL_API_ERR_MESSAGE_SEND,
	/* API failed because could not receive message from the kernel */
	RMNETCTL_API_ERR_MESSAGE_RECEIVE,

	RMNETCTL_INIT_FIRST_ERR,
	/* Invalid process id. So return an error. */
	RMNETCTL_INIT_ERR_PROCESS_ID = RMNETCTL_INIT_FIRST_ERR,
	/* Invalid socket descriptor id. So return an error. */
	RMNETCTL_INIT_ERR_NETLINK_FD,
	/* Could not bind the socket to the Netlink file descriptor */
	RMNETCTL_INIT_ERR_BIND,
	/* Invalid user id. Only root has access to this function. (NA) */
	RMNETCTL_INIT_ERR_INVALID_USER,

	RMNETCTL_API_SECOND_ERR,
	/* API failed because the RmNet handle for the transaction was NULL */
	RMNETCTL_API_ERR_HNDL_INVALID = RMNETCTL_API_SECOND_ERR,
	/* API failed because the request buffer for the transaction was NULL */
	RMNETCTL_API_ERR_REQUEST_NULL,
	/* API failed because the response buffer for the transaction was NULL*/
	RMNETCTL_API_ERR_RESPONSE_NULL,
	/* API failed because the request and response type do not match*/
	RMNETCTL_API_ERR_MESSAGE_TYPE,
	/* API failed because the return type is invalid */
	RMNETCTL_API_ERR_RETURN_TYPE,
	/* API failed because the string was truncated */
	RMNETCTL_API_ERR_STRING_TRUNCATION,

	/* These error are 1-to-1 with rmnet_data config errors in rmnet_data.h
	   for each conversion.
	   please keep the enums synced.
	*/
	RMNETCTL_KERNEL_FIRST_ERR,
	/* No error */
	RMNETCTL_KERNEL_ERROR_NO_ERR = RMNETCTL_KERNEL_FIRST_ERR,
	/* Invalid / unsupported message */
	RMNETCTL_KERNEL_ERR_UNKNOWN_MESSAGE,
	/* Internal problem in the kernel modeule */
	RMNETCTL_KERNEL_ERR_INTERNAL,
	/* Kernel is temporarely out of memory */
	RMNETCTL_KERNEL_ERR_OUT_OF_MEM,
	/* Device already exists / Still in use */
	RMETNCTL_KERNEL_ERR_DEVICE_IN_USE,
	/* Invalid request / Unsupported scenario */
	RMNETCTL_KERNEL_ERR_INVALID_REQUEST,
	/* Device doesn't exist */
	RMNETCTL_KERNEL_ERR_NO_SUCH_DEVICE,
	/* One or more of the arguments is invalid */
	RMNETCTL_KERNEL_ERR_BAD_ARGS,
	/* Egress device is invalid */
	RMNETCTL_KERNEL_ERR_BAD_EGRESS_DEVICE,
	/* TC handle is full */
	RMNETCTL_KERNEL_ERR_TC_HANDLE_FULL,

	/* This should always be the last element */
	RMNETCTL_API_ERR_ENUM_LENGTH
};

#define RMNETCTL_ERR_MSG_SIZE 100

/*!
* @brief Contains a list of error message from API
*/
char rmnetctl_error_code_text
[RMNETCTL_API_ERR_ENUM_LENGTH][RMNETCTL_ERR_MSG_SIZE] = {
	"ERROR: API succeeded\n",
	"ERROR: Unable to allocate the buffer to send message\n",
	"ERROR: Unable to allocate the buffer to receive message\n",
	"ERROR: Could not send the message to kernel\n",
	"ERROR: Unable to receive message from the kernel\n",
	"ERROR: Invalid process id\n",
	"ERROR: Invalid socket descriptor id\n",
	"ERROR: Could not bind to netlink socket\n",
	"ERROR: Only root can access this API\n",
	"ERROR: RmNet handle for the transaction was NULL\n",
	"ERROR: Request buffer for the transaction was NULL\n",
	"ERROR: Response buffer for the transaction was NULL\n",
	"ERROR: Request and response type do not match\n",
	"ERROR: Return type is invalid\n",
	"ERROR: String was truncated\n",
	/* Kernel errors */
	"ERROR: Kernel call succeeded\n",
	"ERROR: Invalid / Unsupported directive\n",
	"ERROR: Internal problem in the kernel module\n",
	"ERROR: The kernel is temporarely out of memory\n",
	"ERROR: Device already exists / Still in use\n",
	"ERROR: Invalid request / Unsupported scenario\n",
	"ERROR: Device doesn't exist\n",
	"ERROR: One or more of the arguments is invalid\n",
	"ERROR: Egress device is invalid\n",
	"ERROR: TC handle is full\n"
};

/*===========================================================================
			 DEFINITIONS AND DECLARATIONS
===========================================================================*/
typedef struct rmnetctl_hndl_s rmnetctl_hndl_t;

/*!
* @brief Public API to initialize the RMNET control driver
* @details Allocates memory for the RmNet handle. Creates and binds to a   and
* netlink socket if successful
* @param **rmnetctl_hndl_t_val RmNet handle to be initialized
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnetctl_init(rmnetctl_hndl_t **hndl, uint16_t *error_code);

/*!
* @brief Public API to clean up the RmNeT control handle
* @details Close the socket and free the RmNet handle
* @param *rmnetctl_hndl_t_val RmNet handle to be initialized
* @return void
*/
void rmnetctl_cleanup(rmnetctl_hndl_t *hndl);

/*!
* @brief Public API to register/unregister a RMNET driver on a particular device
* @details Message type is RMNET_NETLINK_ASSOCIATE_NETWORK_DEVICE or
* RMNET_NETLINK_UNASSOCIATE_NETWORK_DEVICE based on the flag for assoc_dev
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param dev_name Device on which to register the RmNet driver
* @param error_code Status code of this operation
* @param assoc_dev registers the device if RMNETCTL_DEVICE_ASSOCIATE or
* unregisters the device if RMNETCTL_DEVICE_UNASSOCIATE
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_associate_network_device(rmnetctl_hndl_t *hndl,
				   const char *dev_name,
				   uint16_t *error_code,
				   uint8_t assoc_dev);

/*!
* @brief Public API to get if a RMNET driver is registered on a particular
* device
* @details Message type is RMNET_NETLINK_GET_NETWORK_DEVICE_ASSOCIATED.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param dev_name Device on which to check if the RmNet driver is registered
* @param register_status 1 if RmNet data driver is registered on a particular
* device, 0 if not
* @param error_code Status code of this operation
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_get_network_device_associated(rmnetctl_hndl_t *hndl,
					const char *dev_name,
					int *register_status,
					uint16_t *error_code);

/*!
* @brief Public API to set the egress data format for a particular link.
* @details Message type is RMNET_NETLINK_SET_LINK_EGRESS_DATA_FORMAT.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param egress_flags Egress flags to be set on the device
* @param agg_size Max size of aggregated packets
* @param agg_count Number of packets to be aggregated
* @param dev_name Device on which to set the egress data format
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_set_link_egress_data_format(rmnetctl_hndl_t *hndl,
				      uint32_t egress_flags,
				      uint16_t agg_size,
				      uint16_t agg_count,
				      const char *dev_name,
				      uint16_t *error_code);

/*!
* @brief Public API to get the egress data format for a particular link.
* @details Message type is RMNET_NETLINK_GET_LINK_EGRESS_DATA_FORMAT.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param dev_name Device on which to get the egress data format
* @param egress_flags Egress flags from the device
* @param agg_count Number of packets to be aggregated
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_get_link_egress_data_format(rmnetctl_hndl_t *hndl,
				      const char *dev_name,
				      uint32_t *egress_flags,
				      uint16_t *agg_size,
				      uint16_t *agg_count,
				      uint16_t *error_code);

/*!
* @brief Public API to set the ingress data format for a particular link.
* @details Message type is RMNET_NETLINK_SET_LINK_INGRESS_DATA_FORMAT.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param ingress_flags Ingress flags from the device
* @param tail_spacing Tail spacing needed for the packet
* @param dev_name Device on which to set the ingress data format
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_set_link_ingress_data_format_tailspace(rmnetctl_hndl_t *hndl,
						 uint32_t ingress_flags,
						 uint8_t  tail_spacing,
						 const char *dev_name,
						 uint16_t *error_code);

/*!
* @brief Public API to get the ingress data format for a particular link.
* @details Message type is RMNET_NETLINK_GET_LINK_INGRESS_DATA_FORMAT.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param dev_name Device on which to get the ingress data format
* @param ingress_flags Ingress flags from the device
* @param tail_spacing Tail spacing needed for the packet
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_get_link_ingress_data_format_tailspace(rmnetctl_hndl_t *hndl,
						const char *dev_name,
						uint32_t *ingress_flags,
						uint8_t  *tail_spacing,
						uint16_t *error_code);

inline int rmnet_set_link_ingress_data_format(rmnetctl_hndl_t *hndl,
					      uint32_t ingress_flags,
					      const char *dev_name,
					      uint16_t *error_code)
{
	return rmnet_set_link_ingress_data_format_tailspace(hndl,
							    ingress_flags,
							    0,
							    dev_name,
							    error_code);
}

inline int rmnet_get_link_ingress_data_format(rmnetctl_hndl_t *hndl,
					      const char *dev_name,
					      uint32_t *ingress_flags,
					      uint16_t *error_code)
{
	return rmnet_get_link_ingress_data_format_tailspace(hndl,
							    dev_name,
							    ingress_flags,
							    0,
							    error_code);
}

/*!
* @brief Public API to set the logical endpoint configuration for a
* particular link.
* @details Message type is RMNET_NETLINK_SET_LOGICAL_EP_CONFIG.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param logical_ep_id Logical end point id on which the configuration is to be
* set
* @param rmnet_mode RmNet mode to be set on the device
* @param dev_name Device on which to set the logical end point configuration
* @param egress_dev_name Egress Device if operating in bridge mode
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_set_logical_ep_config(rmnetctl_hndl_t *hndl,
				int32_t ep_id,
				uint8_t operating_mode,
				const char *dev_name,
				const char *next_dev,
				uint16_t *error_code);

/*!
* @brief Public API to un-set the logical endpoint configuration for a
* particular link.
* @details Message type is RMNET_NETLINK_UNSET_LOGICAL_EP_CONFIG.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param logical_ep_id Logical end point id on which the configuration is to be
* un-set
* @param dev_name Device on which to un-set the logical end point configuration
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_unset_logical_ep_config(rmnetctl_hndl_t *hndl,
				  int32_t ep_id,
				  const char *dev_name,
				  uint16_t *error_code);
/*!
* @brief Public API to get the logical endpoint configuration for a
* particular link.
* @details Message type is RMNET_NETLINK_GET_LOGICAL_EP_CONFIG.
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param logical_ep_id Logical end point id from which to get the configuration
* @param dev_name Device on which to get the logical end point configuration
* @param rmnet_mode RmNet mode from the device
* @param next_dev Egress Device name
* @param next_dev_len Egress Device I/O string len
* @param error_code Status code of this operation returned from the kernel
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_get_logical_ep_config(rmnetctl_hndl_t *hndl,
				int32_t ep_id,
				const char *dev_name,
				uint8_t *operating_mode,
				char **next_dev,
				uint32_t next_dev_len,
				uint16_t *error_code);

/*!
* @brief Public API to create a new virtual device node
* @details Message type is RMNET_NETLINK_NEW_VND or
* RMNETCTL_FREE_VND based on the flag for new_vnd
* @param hndl RmNet handle for the Netlink message
* @param id Node number to create the virtual network device node
* @param error_code Status code of this operation returned from the kernel
* @param new_vnd creates a new virtual network device if  RMNETCTL_NEW_VND or
* frees the device if RMNETCTL_FREE_VND
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_new_vnd(rmnetctl_hndl_t *hndl,
		  uint32_t id,
		  uint16_t *error_code,
		  uint8_t new_vnd);

/*!
 * @brief Public API to create a new virtual device node with a custom prefix
 * @details Message type is RMNET_NETLINK_NEW_VND or
 * RMNETCTL_FREE_VND based on the flag for new_vnd
 * @param hndl RmNet handle for the Netlink message
 * @param id Node number to create the virtual network device node
 * @param error_code Status code of this operation returned from the kernel
 * @param new_vnd creates a new virtual network device if  RMNETCTL_NEW_VND or
 * frees the device if RMNETCTL_FREE_VND
 * @param prefix Prefix to be used when naming the network interface
 * @return RMNETCTL_SUCCESS if successful
 * @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
 * @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
 * Check error_code
 * @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
 */
int rmnet_new_vnd_prefix(rmnetctl_hndl_t *hndl,
			 uint32_t id,
			 uint16_t *error_code,
			 uint8_t new_vnd,
			 const char *prefix);
/*!
 * @brief API to get the ASCII name of a virtual network device from its ID
 * @param hndl RmNet handle for the Netlink message
 * @param id Node number to create the virtual network device node
 * @param error_code Status code of this operation returned from the kernel
 * @param buf Buffer to store ASCII representation of device name
 * @param buflen Length of the buffer
 * @param prefix Prefix to be used when naming the network interface
 * @return RMNETCTL_SUCCESS if successful
 * @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
 * @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
 * Check error_code
 * @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
 */

int rmnet_get_vnd_name(rmnetctl_hndl_t *hndl,
                      uint32_t id,
                      uint16_t *error_code,
                      char *buf,
                      uint32_t buflen);

/*!
* @brief Public API to set or clear a flow
* @details Message type is RMNET_NETLINK_ADD_VND_TC_FLOW or
* RMNET_NETLINK_DEL_VND_TC_FLOW based on the flag for set_flow
* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param id Node number to set or clear the flow on the virtual network
* device node
* @param map_flow_id Flow handle of the modem
* @param tc_flow_id Software flow handle
* @param set_flow sets the flow if  RMNET_NETLINK_SET_FLOW or
* clears the flow if RMNET_NETLINK_CLEAR_FLOW
* @return RMNETCTL_SUCCESS if successful
* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
* Check error_code
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int rmnet_add_del_vnd_tc_flow(rmnetctl_hndl_t *hndl,
			      uint32_t id,
			      uint32_t map_flow_id,
			      uint32_t tc_flow_id,
			      uint8_t set_flow,
			      uint16_t *error_code);

#endif /* not defined LIBRMNETCTL_H */