mbed-os/features/FEATURE_COMMON_PAL/mbed-client-c/nsdl-c/sn_nsdl_lib.h

731 lines
27 KiB
C
Executable File

/*
* Copyright (c) 2011-2015 ARM Limited. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* \file sn_nsdl_lib.h
*
* \brief NanoService Devices Library header file
*
*
*/
#ifndef SN_NSDL_LIB_H_
#define SN_NSDL_LIB_H_
#include "ns_list.h"
#ifdef __cplusplus
extern "C" {
#endif
#define SN_NSDL_ENDPOINT_NOT_REGISTERED 0
#define SN_NSDL_ENDPOINT_IS_REGISTERED 1
/* Handle structure */
struct nsdl_s;
/**
* \brief Received device server security
*/
typedef enum omalw_server_security_ {
SEC_NOT_SET = -1,
PSK = 0,
RPK = 1,
CERTIFICATE = 2,
NO_SEC = 3
} omalw_server_security_t;
/**
* \brief Endpoint binding and mode
*/
typedef enum sn_nsdl_oma_binding_and_mode_ {
BINDING_MODE_NOT_SET = 0,
BINDING_MODE_U = 0x01,
BINDING_MODE_Q = 0x02,
BINDING_MODE_S = 0x04
} sn_nsdl_oma_binding_and_mode_t;
/**
* \brief Endpoint registration mode.
* If REGISTER_WITH_RESOURCES, endpoint sends list of all resources during registration.
* If REGISTER_WITH_TEMPLATE, endpoint sends registration without resource list. Device server must have
* correctly configured template.
*/
typedef enum sn_nsdl_registration_mode_ {
REGISTER_WITH_RESOURCES = 0,
REGISTER_WITH_TEMPLATE
} sn_nsdl_registration_mode_t;
typedef struct omalw_certificate_list_ {
uint8_t certificate_chain_len;
uint16_t own_private_key_len;
uint16_t certificate_len[2];
uint8_t *certificate_ptr[2];
uint8_t *own_private_key_ptr;
} omalw_certificate_list_t;
/**
* \brief Endpoint registration parameters
*/
typedef struct sn_nsdl_ep_parameters_ {
uint8_t endpoint_name_len;
uint8_t domain_name_len;
uint8_t type_len;
uint8_t lifetime_len;
uint8_t location_len;
sn_nsdl_registration_mode_t ds_register_mode; /**< Defines registration mode */
sn_nsdl_oma_binding_and_mode_t binding_and_mode; /**< Defines endpoints binding and mode */
uint8_t *endpoint_name_ptr; /**< Endpoint name */
uint8_t *domain_name_ptr; /**< Domain to register. If null, NSP uses default domain */
uint8_t *type_ptr; /**< Endpoint type */
uint8_t *lifetime_ptr; /**< Endpoint lifetime in seconds. eg. "1200" = 1200 seconds */
uint8_t *location_ptr; /**< Endpoint location in server, optional parameter,default is NULL */
} sn_nsdl_ep_parameters_s;
/**
* \brief For internal use
*/
typedef struct sn_nsdl_sent_messages_ {
uint8_t message_type;
uint16_t msg_id_number;
ns_list_link_t link;
} sn_nsdl_sent_messages_s;
/**
* \brief Includes resource path
*/
typedef struct sn_grs_resource_ {
uint8_t pathlen;
uint8_t *path;
} sn_grs_resource_s;
/**
* \brief Table of created resources
*/
typedef struct sn_grs_resource_list_ {
uint8_t res_count; /**< Number of resources */
sn_grs_resource_s *res;
} sn_grs_resource_list_s;
/**
* \brief Resource access rights
*/
typedef enum sn_grs_resource_acl_ {
SN_GRS_GET_ALLOWED = 0x01 ,
SN_GRS_PUT_ALLOWED = 0x02,
SN_GRS_POST_ALLOWED = 0x04,
SN_GRS_DELETE_ALLOWED = 0x08
} sn_grs_resource_acl_e;
typedef enum sn_nsdl_oma_device_error_ {
NO_ERROR = 0,
LOW_BATTERY_POWER = 1,
EXTERNAL_POWER_SUPPLY_OFF = 2,
GPS_MODULE_FAILURE = 3,
LOW_RECEIVED_SIGNAL_STRENGTH = 4,
OUT_OF_MEMORY = 5,
SMS_FAILURE = 6,
IP_CONN_FAILURE = 7,
PERIPHERAL_MALFUNCTION = 8
} sn_nsdl_oma_device_error_t;
/**
* \brief Defines the resource mode
*/
typedef enum sn_nsdl_resource_mode_ {
SN_GRS_STATIC = 0, /**< Static resources have some value that doesn't change */
SN_GRS_DYNAMIC, /**< Dynamic resources are handled in application. Therefore one must give function callback pointer to them */
SN_GRS_DIRECTORY /**< Directory resources are unused and unsupported */
} sn_nsdl_resource_mode_e;
/**
* \brief Resource registration parameters
*/
typedef struct sn_nsdl_resource_parameters_ {
unsigned int observable:2;
unsigned int registered:2;
uint16_t resource_type_len;
uint16_t interface_description_len;
uint16_t coap_content_type;
// uint8_t mime_content_type;
uint8_t *resource_type_ptr;
uint8_t *interface_description_ptr;
} sn_nsdl_resource_parameters_s;
/**
* \brief Defines parameters for the resource.
*/
typedef struct sn_nsdl_resource_info_ {
unsigned int mode:2; /**< STATIC etc.. */
unsigned int access:4;
bool publish_uri:1;
bool is_put:1; //if true, pointers are assumed to be consts (never freed). Note: resource_parameters_ptr is always freed!
uint8_t external_memory_block;
uint16_t pathlen; /**< Address */
uint16_t resourcelen; /**< 0 if dynamic resource, resource information in static resource */
sn_nsdl_resource_parameters_s *resource_parameters_ptr;
uint8_t (*sn_grs_dyn_res_callback)(struct nsdl_s *, sn_coap_hdr_s *, sn_nsdl_addr_s *, sn_nsdl_capab_e);
uint8_t *path;
uint8_t *resource; /**< NULL if dynamic resource */
ns_list_link_t link;
} sn_nsdl_resource_info_s;
/**
* \brief Defines OMA device object parameters.
*/
typedef struct sn_nsdl_oma_device_ {
sn_nsdl_oma_device_error_t error_code; /**< Error code. Mandatory. Can be more than one */
uint8_t (*sn_oma_device_boot_callback)(struct nsdl_s *, sn_coap_hdr_s *, sn_nsdl_addr_s *, sn_nsdl_capab_e); /**< Device boot callback function. If defined, this is called when reset request is received */
} sn_nsdl_oma_device_t;
/**
* \brief Defines OMAlw server information
*/
typedef struct sn_nsdl_oma_server_info_ {
sn_nsdl_addr_s *omalw_address_ptr;
omalw_server_security_t omalw_server_security;
} sn_nsdl_oma_server_info_t;
/**
* \brief Defines endpoint parameters to OMA bootstrap.
*/
typedef struct sn_nsdl_bs_ep_info_ {
void (*oma_bs_status_cb)(sn_nsdl_oma_server_info_t *); /**< Callback for OMA bootstrap status */
void (*oma_bs_status_cb_handle)(sn_nsdl_oma_server_info_t *,
struct nsdl_s *); /**< Callback for OMA bootstrap status with nsdl handle */
sn_nsdl_oma_device_t *device_object; /**< OMA LWM2M mandatory device resources */
} sn_nsdl_bs_ep_info_t;
/**
* \fn struct nsdl_s *sn_nsdl_init (uint8_t (*sn_nsdl_tx_cb)(sn_nsdl_capab_e , uint8_t *, uint16_t, sn_nsdl_addr_s *),
* uint8_t (*sn_nsdl_rx_cb)(sn_coap_hdr_s *, sn_nsdl_addr_s *),
* sn_nsdl_mem_s *sn_memory)
*
* \brief Initialization function for NSDL library. Initializes NSDL, GRS, HTTP and CoAP.
*
* \param *sn_nsdl_tx_callback A callback function for sending messages.
*
* \param *sn_nsdl_rx_callback A callback function for parsed messages. If received message is not CoAP protocol message (eg. ACK), message for GRS (GET, PUT, POST, DELETE) or
* reply for some DS messages (register message etc.), rx callback will be called.
*
* \param *sn_memory Memory structure which includes function pointers to the allocation and free functions.
*
* \return pointer to created handle structure. NULL if failed
*/
struct nsdl_s *sn_nsdl_init(uint8_t (*sn_nsdl_tx_cb)(struct nsdl_s *, sn_nsdl_capab_e , uint8_t *, uint16_t, sn_nsdl_addr_s *),
uint8_t (*sn_nsdl_rx_cb)(struct nsdl_s *, sn_coap_hdr_s *, sn_nsdl_addr_s *),
void *(*sn_nsdl_alloc)(uint16_t), void (*sn_nsdl_free)(void *));
/**
* \fn extern uint16_t sn_nsdl_register_endpoint(struct nsdl_s *handle, sn_nsdl_ep_parameters_s *endpoint_info_ptr);
*
* \brief Registers endpoint to mbed Device Server.
* \param *handle Pointer to nsdl-library handle
* \param *endpoint_info_ptr Contains endpoint information.
*
* \return registration message ID, 0 if failed
*/
extern uint16_t sn_nsdl_register_endpoint(struct nsdl_s *handle, sn_nsdl_ep_parameters_s *endpoint_info_ptr);
/**
* \fn extern uint16_t sn_nsdl_unregister_endpoint(struct nsdl_s *handle)
*
* \brief Sends unregister-message to mbed Device Server.
*
* \param *handle Pointer to nsdl-library handle
*
* \return unregistration message ID, 0 if failed
*/
extern uint16_t sn_nsdl_unregister_endpoint(struct nsdl_s *handle);
/**
* \fn extern uint16_t sn_nsdl_update_registration(struct nsdl_s *handle, uint8_t *lt_ptr, uint8_t lt_len);
*
* \brief Update the registration with mbed Device Server.
*
* \param *handle Pointer to nsdl-library handle
* \param *lt_ptr Pointer to lifetime value string in ascii form, eg. "1200"
* \param lt_len Length of the lifetime string
*
* \return registration update message ID, 0 if failed
*/
extern uint16_t sn_nsdl_update_registration(struct nsdl_s *handle, uint8_t *lt_ptr, uint8_t lt_len);
/**
* \fn extern int8_t sn_nsdl_set_endpoint_location(struct nsdl_s *handle, uint8_t *location_ptr, uint8_t location_len);
*
* \brief Sets the location receievd from Device Server.
*
* \param *handle Pointer to nsdl-library handle
* \param *lt_ptr Pointer to location value string , eg. "s322j4k"
* \param lt_len Length of the location string
*
* \return success, 0 if failed -1
*/
extern int8_t sn_nsdl_set_endpoint_location(struct nsdl_s *handle, uint8_t *location_ptr, uint8_t location_len);
/**
* \fn extern int8_t sn_nsdl_is_ep_registered(struct nsdl_s *handle)
*
* \brief Checks if endpoint is registered.
*
* \param *handle Pointer to nsdl-library handle
*
* \return 1 Endpoint registration is done successfully
* \return 0 Endpoint is not registered
*/
extern int8_t sn_nsdl_is_ep_registered(struct nsdl_s *handle);
/**
* \fn extern void sn_nsdl_nsp_lost(struct nsdl_s *handle);
*
* \brief A function to inform mbed Device C client library if application detects a fault in mbed Device Server registration.
*
* \param *handle Pointer to nsdl-library handle
*
* After calling this function sn_nsdl_is_ep_registered() will return "not registered".
*/
extern void sn_nsdl_nsp_lost(struct nsdl_s *handle);
/**
* \fn extern uint16_t sn_nsdl_send_observation_notification(struct nsdl_s *handle, uint8_t *token_ptr, uint8_t token_len,
* uint8_t *payload_ptr, uint16_t payload_len,
* sn_coap_observe_e observe,
* sn_coap_msg_type_e message_type, sn_coap_content_format_e content_format)
*
*
* \brief Sends observation message to mbed Device Server
*
* \param *handle Pointer to nsdl-library handle
* \param *token_ptr Pointer to token to be used
* \param token_len Token length
* \param *payload_ptr Pointer to payload to be sent
* \param payload_len Payload length
* \param observe Observe option value to be sent
* \param message_type Observation message type (confirmable or non-confirmable)
* \param content_format Observation message payload content format
*
* \return !0 Success, observation messages message ID
* \return 0 Failure
*/
extern uint16_t sn_nsdl_send_observation_notification(struct nsdl_s *handle, uint8_t *token_ptr, uint8_t token_len,
uint8_t *payload_ptr, uint16_t payload_len,
sn_coap_observe_e observe,
sn_coap_msg_type_e message_type,
sn_coap_content_format_e content_format);
/**
* \fn extern uint16_t sn_nsdl_send_observation_notification_with_uri_path(struct nsdl_s *handle, uint8_t *token_ptr, uint8_t token_len,
* uint8_t *payload_ptr, uint16_t payload_len,
* sn_coap_observe_e observe,
* sn_coap_msg_type_e message_type, uint8_t content_type,
* uint8_t *uri_path_ptr,
* uint16_t uri_path_len)
*
*
* \brief Sends observation message to mbed Device Server with uri path
*
* \param *handle Pointer to nsdl-library handle
* \param *token_ptr Pointer to token to be used
* \param token_len Token length
* \param *payload_ptr Pointer to payload to be sent
* \param payload_len Payload length
* \param observe Observe option value to be sent
* \param message_type Observation message type (confirmable or non-confirmable)
* \param content_type Observation message payload contetnt type
* \param uri_path_ptr Pointer to uri path to be sent
* \param uri_path_len Uri path len
*
* \return !0 Success, observation messages message ID
* \return 0 Failure
*/
extern uint16_t sn_nsdl_send_observation_notification_with_uri_path(struct nsdl_s *handle, uint8_t *token_ptr, uint8_t token_len,
uint8_t *payload_ptr, uint16_t payload_len,
sn_coap_observe_e observe,
sn_coap_msg_type_e message_type,
uint8_t content_type,
uint8_t *uri_path_ptr,
uint16_t uri_path_len);
/**
* \fn extern uint32_t sn_nsdl_get_version(void)
*
* \brief Version query function.
*
* Used to retrieve the version information from the mbed Device C Client library.
*
* \return Pointer to library version string
*/
extern char *sn_nsdl_get_version(void);
/**
* \fn extern int8_t sn_nsdl_process_coap(struct nsdl_s *handle, uint8_t *packet, uint16_t packet_len, sn_nsdl_addr_s *src)
*
* \brief To push CoAP packet to mbed Device C Client library
*
* Used to push an CoAP packet to mbed Device C Client library for processing.
*
* \param *handle Pointer to nsdl-library handle
*
* \param *packet Pointer to a uint8_t array containing the packet (including the CoAP headers).
* After successful execution this array may contain the response packet.
*
* \param *packet_len Pointer to length of the packet. After successful execution this array may contain the length
* of the response packet.
*
* \param *src Pointer to packet source address information. After successful execution this array may contain
* the destination address of the response packet.
*
* \return 0 Success
* \return -1 Failure
*/
extern int8_t sn_nsdl_process_coap(struct nsdl_s *handle, uint8_t *packet, uint16_t packet_len, sn_nsdl_addr_s *src);
/**
* \fn extern int8_t sn_nsdl_exec(struct nsdl_s *handle, uint32_t time);
*
* \brief CoAP retransmission function.
*
* Used to give execution time for the mbed Device C Client library for retransmissions.
*
* \param *handle Pointer to nsdl-library handle
*
* \param time Time in seconds.
*
* \return 0 Success
* \return -1 Failure
*/
extern int8_t sn_nsdl_exec(struct nsdl_s *handle, uint32_t time);
/**
* \fn extern int8_t sn_nsdl_create_resource(struct nsdl_s *handle, sn_nsdl_resource_info_s *res);
*
* \brief Resource creating function.
*
* Used to create a static or dynamic CoAP resource.
*
* \param *res Pointer to a structure of type sn_nsdl_resource_info_t that contains the information
* about the resource.
*
* \return 0 Success
* \return -1 Failure
* \return -2 Resource already exists
* \return -3 Invalid path
* \return -4 List adding failure
*/
extern int8_t sn_nsdl_create_resource(struct nsdl_s *handle, sn_nsdl_resource_info_s *res);
/**
* \fn extern int8_t sn_nsdl_put_resource(struct nsdl_s *handle, sn_nsdl_resource_info_s *res);
*
* \brief Resource putting function.
*
* Used to put a static or dynamic CoAP resource without creating copy of it.
* NOTE: Remember that only resource will be owned, not data that it contains
*
* \param *res Pointer to a structure of type sn_nsdl_resource_info_t that contains the information
* about the resource.
*
* \return 0 Success
* \return -1 Failure
* \return -2 Resource already exists
* \return -3 Invalid path
* \return -4 List adding failure
*/
extern int8_t sn_nsdl_put_resource(struct nsdl_s *handle, sn_nsdl_resource_info_s *res);
/**
* \fn extern int8_t sn_nsdl_update_resource(sn_nsdl_resource_info_s *res)
*
* \brief Resource updating function.
*
* Used to update the direct value of a static resource, the callback function pointer of a dynamic resource
* and access rights of the recource.
*
* \param *handle Pointer to nsdl-library handle
* \param *res Pointer to a structure of type sn_nsdl_resource_info_t that contains the information
* about the resource. Only the pathlen and path elements are evaluated along with
* either resourcelen and resource or the function pointer.
*
* \return 0 Success
* \return -1 Failure
*/
extern int8_t sn_nsdl_update_resource(struct nsdl_s *handle, sn_nsdl_resource_info_s *res);
/**
* \fn extern int8_t sn_nsdl_delete_resource(struct nsdl_s *handle, uint8_t pathlen, uint8_t *path)
*
* \brief Resource delete function.
*
* Used to delete a resource. If resource has a subresources, these all must also be removed.
*
* \param *handle Pointer to nsdl-library handle
* \param pathlen Contains the length of the path that is to be deleted (excluding possible trailing "\0").
* \param *path_ptr A pointer to an array containing the path.
*
* \return 0 Success
* \return -1 Failure (No such resource)
*/
extern int8_t sn_nsdl_delete_resource(struct nsdl_s *handle, uint16_t pathlen, uint8_t *path);
/**
* \fn extern sn_nsdl_resource_info_s *sn_nsdl_get_resource(struct nsdl_s *handle, uint16_t pathlen, uint8_t *path)
*
* \brief Resource get function.
*
* Used to get a resource.
*
* \param *handle Pointer to nsdl-library handle
* \param pathlen Contains the length of the path that is to be returned (excluding possible trailing '\0').
* \param *path A pointer to an array containing the path.
*
* \return !NULL Success, pointer to a sn_nsdl_resource_info_s that contains the resource information\n
* \return NULL Failure
*/
extern sn_nsdl_resource_info_s *sn_nsdl_get_resource(struct nsdl_s *handle, uint16_t pathlen, uint8_t *path);
/**
* \fn extern sn_grs_resource_list_s *sn_nsdl_list_resource(struct nsdl_s *handle, uint16_t pathlen, uint8_t *path)
*
* \brief Resource list function.
*
* \param *handle Pointer to nsdl-library handle
* \param pathlen Contains the length of the target path (excluding possible trailing '\0').
* The length value is not examined if the path itself is a NULL pointer.
* \param *path A pointer to an array containing the path or a NULL pointer.
*
* \return !NULL A pointer to a sn_grs_resource_list_s structure containing the resource listing.
* \return NULL Failure with an unspecified error
*/
sn_grs_resource_list_s *sn_nsdl_list_resource(struct nsdl_s *handle, uint16_t pathlen, uint8_t *path);
/**
* \fn extern void sn_nsdl_free_resource_list(struct nsdl_s *handle, sn_grs_resource_list_s *list)
*
* \brief Free a resource list obtained from sn_nsdl_list_resource()
*
* \param list The list to free, or NULL.
*/
void sn_nsdl_free_resource_list(struct nsdl_s *handle, sn_grs_resource_list_s *list);
/**
* \fn extern int8_t sn_nsdl_send_coap_message(struct nsdl_s *handle, sn_nsdl_addr_s *address_ptr, sn_coap_hdr_s *coap_hdr_ptr);
*
* \brief Send an outgoing CoAP request.
*
* \param *handle Pointer to nsdl-library handle
* \param *address_ptr Pointer to source address struct
* \param *coap_hdr_ptr Pointer to CoAP message to be sent
*
* \return 0 Success
* \return -1 Failure
*/
extern int8_t sn_nsdl_send_coap_message(struct nsdl_s *handle, sn_nsdl_addr_s *address_ptr, sn_coap_hdr_s *coap_hdr_ptr);
/**
* \fn extern int8_t set_NSP_address(struct nsdl_s *handle, uint8_t *NSP_address, uint16_t port, sn_nsdl_addr_type_e address_type);
*
* \brief This function is used to set the mbed Device Server address given by an application.
*
* \param *handle Pointer to nsdl-library handle
* \return 0 Success
* \return -1 Failed to indicate that internal address pointer is not allocated (call nsdl_init() first).
*/
extern int8_t set_NSP_address(struct nsdl_s *handle, uint8_t *NSP_address, uint16_t port, sn_nsdl_addr_type_e address_type);
/**
* \fn extern int8_t set_NSP_address(struct nsdl_s *handle, uint8_t *NSP_address, uint8_t address_length, uint16_t port, sn_nsdl_addr_type_e address_type);
*
* \brief This function is used to set the mbed Device Server address given by an application.
*
* \param *handle Pointer to nsdl-library handle
* \return 0 Success
* \return -1 Failed to indicate that internal address pointer is not allocated (call nsdl_init() first).
*/
extern int8_t set_NSP_address_2(struct nsdl_s *handle, uint8_t *NSP_address, uint8_t address_length, uint16_t port, sn_nsdl_addr_type_e address_type);
/**
* \fn extern int8_t sn_nsdl_destroy(struct nsdl_s *handle);
*
* \param *handle Pointer to nsdl-library handle
* \brief This function releases all allocated memory in mbed Device C Client library.
*/
extern int8_t sn_nsdl_destroy(struct nsdl_s *handle);
/**
* \fn extern uint16_t sn_nsdl_oma_bootstrap(struct nsdl_s *handle, sn_nsdl_addr_s *bootstrap_address_ptr, sn_nsdl_ep_parameters_s *endpoint_info_ptr, sn_nsdl_bs_ep_info_t *bootstrap_endpoint_info_ptr);
*
* \brief Starts OMA bootstrap process
*
* \param *handle Pointer to nsdl-library handle
*
* \return bootstrap message ID, 0 if failed
*/
extern uint16_t sn_nsdl_oma_bootstrap(struct nsdl_s *handle, sn_nsdl_addr_s *bootstrap_address_ptr, sn_nsdl_ep_parameters_s *endpoint_info_ptr, sn_nsdl_bs_ep_info_t *bootstrap_endpoint_info_ptr);
/**
* \fn extern omalw_certificate_list_t *sn_nsdl_get_certificates(struct nsdl_s *handle);
*
* \brief Get pointer to received device server certificates
*
* \param *handle Pointer to nsdl-library handle
*/
extern omalw_certificate_list_t *sn_nsdl_get_certificates(struct nsdl_s *handle);
/**
* \fn extern int8_t sn_nsdl_update_certificates(struct nsdl_s *handle, omalw_certificate_list_t* certificate_ptr, uint8_t certificate_chain);
*
* \brief Updates certificate pointers to resource server.
*
* \param *handle Pointer to nsdl-library handle
*/
extern int8_t sn_nsdl_update_certificates(struct nsdl_s *handle, omalw_certificate_list_t *certificate_ptr, uint8_t certificate_chain);
/**
* \fn extern int8_t sn_nsdl_create_oma_device_object(struct nsdl_s *handle, sn_nsdl_oma_device_t *device_object_ptr);
*
* \brief Creates new device object resource
*
* \param *handle Pointer to nsdl-library handle
*/
extern int8_t sn_nsdl_create_oma_device_object(struct nsdl_s *handle, sn_nsdl_oma_device_t *device_object_ptr);
/**
* \fn sn_coap_hdr_s *sn_nsdl_build_response(struct nsdl_s *handle, sn_coap_hdr_s *coap_packet_ptr, uint8_t msg_code)
*
* \brief Prepares generic response packet from a request packet. This function allocates memory for the resulting sn_coap_hdr_s
*
* \param *handle Pointer to library handle
* \param *coap_packet_ptr The request packet pointer
* \param msg_code response messages code
*
* \return *coap_packet_ptr The allocated and pre-filled response packet pointer
* NULL Error in parsing the request
*
*/
extern sn_coap_hdr_s *sn_nsdl_build_response(struct nsdl_s *handle, sn_coap_hdr_s *coap_packet_ptr, uint8_t msg_code);
/**
* \brief Allocates and initializes options list structure
*
* \param *handle Pointer to library handle
* \param *coap_msg_ptr is pointer to CoAP message that will contain the options
*
* If the message already has a pointer to an option structure, that pointer
* is returned, rather than a new structure being allocated.
*
* \return Return value is pointer to the CoAP options structure.\n
* In following failure cases NULL is returned:\n
* -Failure in given pointer (= NULL)\n
* -Failure in memory allocation (malloc() returns NULL)
*/
extern sn_coap_options_list_s *sn_nsdl_alloc_options_list(struct nsdl_s *handle, sn_coap_hdr_s *coap_msg_ptr);
/**
* \fn void sn_nsdl_release_allocated_coap_msg_mem(struct nsdl_s *handle, sn_coap_hdr_s *freed_coap_msg_ptr)
*
* \brief Releases memory of given CoAP message
*
* Note!!! Does not release Payload part
*
* \param *handle Pointer to library handle
*
* \param *freed_coap_msg_ptr is pointer to released CoAP message
*/
extern void sn_nsdl_release_allocated_coap_msg_mem(struct nsdl_s *handle, sn_coap_hdr_s *freed_coap_msg_ptr);
/**
* \fn int8_t sn_nsdl_set_retransmission_parameters(struct nsdl_s *handle, uint8_t resending_count, uint8_t resending_intervall)
*
* \brief If re-transmissions are enabled, this function changes resending count and interval.
*
* \param *handle Pointer to library handle
* \param uint8_t resending_count max number of resendings for message
* \param uint8_t resending_intervall message resending intervall in seconds
* \return 0 = success, -1 = failure
*/
extern int8_t sn_nsdl_set_retransmission_parameters(struct nsdl_s *handle, uint8_t resending_count, uint8_t resending_interval);
/**
* \fn int8_t sn_nsdl_set_retransmission_buffer(struct nsdl_s *handle, uint8_t buffer_size_messages, uint16_t buffer_size_bytes)
*
* \brief If re-transmissions are enabled, this function changes message retransmission queue size.
* Set size to '0' to disable feature. If both are set to '0', then re-sendings are disabled.
*
* \param *handle Pointer to library handle
* \param uint8_t buffer_size_messages queue size - maximum number of messages to be saved to queue
* \param uint8_t buffer_size_bytes queue size - maximum size of messages saved to queue
* \return 0 = success, -1 = failure
*/
extern int8_t sn_nsdl_set_retransmission_buffer(struct nsdl_s *handle,
uint8_t buffer_size_messages, uint16_t buffer_size_bytes);
/**
* \fn int8_t sn_nsdl_set_block_size(struct nsdl_s *handle, uint16_t block_size)
*
* \brief If block transfer is enabled, this function changes the block size.
*
* \param *handle Pointer to library handle
* \param uint16_t block_size maximum size of CoAP payload. Valid sizes are 16, 32, 64, 128, 256, 512 and 1024 bytes
* \return 0 = success, -1 = failure
*/
extern int8_t sn_nsdl_set_block_size(struct nsdl_s *handle, uint16_t block_size);
/**
* \fn int8_t sn_nsdl_set_duplicate_buffer_size(struct nsdl_s *handle,uint8_t message_count)
*
* \brief If dublicate message detection is enabled, this function changes buffer size.
*
* \param *handle Pointer to library handle
* \param uint8_t message_count max number of messages saved for duplicate control
* \return 0 = success, -1 = failure
*/
extern int8_t sn_nsdl_set_duplicate_buffer_size(struct nsdl_s *handle, uint8_t message_count);
#ifdef __cplusplus
}
#endif
#endif /* SN_NSDL_LIB_H_ */