rmnetctl/inc/librmnetctl.h

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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

enum rmnetctl_error_codes_e {
	/* API succeeded. This should always be the first element. */
	RMNETCTL_API_SUCCESS,
	/* API failed because not enough memory to create buffer to send
	 * message */
	RMNETCTL_API_ERR_REQUEST_INVALID,
	/* 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,
	/* Invalid process id. So return an error. */
	RMNETCTL_INIT_ERR_PROCESS_ID,
	/* 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,
	/* API failed because the RmNet handle for the transaction was NULL */
	RMNETCTL_API_ERR_HNDL_INVALID,
	/* 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,
	/* 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"
};

/*===========================================================================
			 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 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(rmnetctl_hndl_t *hndl,
				       uint32_t ingress_flags,
				       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 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(rmnetctl_hndl_t *hndl,
				       const char *dev_name,
				       uint32_t *ingress_flags,
				       uint16_t *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 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 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_get_logical_ep_config(rmnetctl_hndl_t *hndl,
				int32_t ep_id,
				const char *dev_name,
				uint8_t *operating_mode,
				char **next_dev,
				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 *rmnetctl_hndl_t_val RmNet handle for the Netlink message
* @param node_number 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);

#endif /* not defined LIBRMNETCTL_H */