coap_message_handler.h

00001 /*
00002  * Copyright (c) 2015-2017, Arm Limited and affiliates.
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 #ifndef __COAP_MESSAGE_HANDLER_H__
00019 #define __COAP_MESSAGE_HANDLER_H__
00020 
00021 #include <inttypes.h>
00022 #include "mbed-coap/sn_coap_header.h"
00023 #include "ns_list.h"
00024 
00025 #define TRANSACTION_LIFETIME 180
00026 /* Default value for CoAP duplicate message buffer (0 = disabled) */
00027 #define DUPLICATE_MESSAGE_BUFFER_SIZE 0
00028 
00029 /* Default values for CoAP resendings */
00030 #define COAP_RESENDING_COUNT 3
00031 #define COAP_RESENDING_INTERVAL 10
00032 
00033 /**
00034  * \brief Service message response receive callback.
00035  *
00036  * Function that handles CoAP service message receiving and parsing
00037  *
00038  * \param msg_id           Id number of the current message.
00039  * \param response_ptr     Pointer to CoAP header structure.
00040  *
00041  * \return 0 for success / -1 for failure
00042   */
00043 typedef int coap_message_handler_response_recv(int8_t service_id, uint8_t source_address[static 16], uint16_t source_port, sn_coap_hdr_s *response_ptr);
00044 
00045 typedef struct coap_msg_handler_s {
00046     void *(*sn_coap_service_malloc)(uint16_t);
00047     void (*sn_coap_service_free)(void *);
00048 
00049     uint8_t (*sn_coap_tx_callback)(uint8_t *, uint16_t, sn_nsdl_addr_s *, void *);
00050 
00051     struct coap_s *coap;
00052 } coap_msg_handler_t;
00053 
00054 typedef struct coap_transaction {
00055     uint8_t remote_address[16];
00056     uint8_t local_address[16];
00057     uint8_t token[8];
00058     uint32_t valid_until;
00059     uint8_t *data_ptr;
00060     coap_message_handler_response_recv *resp_cb;
00061     uint16_t remote_port;
00062     uint16_t msg_id;
00063     uint16_t data_len;
00064     int8_t service_id;
00065     uint8_t options;
00066     uint8_t token_len;
00067     sn_coap_msg_type_e req_msg_type;
00068     bool client_request: 1;
00069 
00070     ns_list_link_t link;
00071 } coap_transaction_t;
00072 
00073 
00074 extern coap_msg_handler_t *coap_message_handler_init(void *(*used_malloc_func_ptr)(uint16_t), void (*used_free_func_ptr)(void *),
00075                                   uint8_t (*used_tx_callback_ptr)(uint8_t *, uint16_t, sn_nsdl_addr_s *, void *));
00076 
00077 extern int8_t coap_message_handler_destroy(coap_msg_handler_t *handle);
00078 
00079 extern coap_transaction_t *coap_message_handler_transaction_valid(coap_transaction_t *tr_ptr);
00080 
00081 extern coap_transaction_t *coap_message_handler_find_transaction(uint8_t *address_ptr, uint16_t port);
00082 
00083 extern int16_t coap_message_handler_coap_msg_process(coap_msg_handler_t *handle, int8_t socket_id, const uint8_t source_addr_ptr[static 16], uint16_t port, const uint8_t dst_addr_ptr[static 16],
00084                                                          uint8_t *data_ptr, uint16_t data_len, int16_t (cb)(int8_t, sn_coap_hdr_s *, coap_transaction_t *));
00085 
00086 extern uint16_t coap_message_handler_request_send(coap_msg_handler_t *handle, int8_t service_id, uint8_t options, const uint8_t destination_addr[static 16],
00087                                                       uint16_t destination_port, sn_coap_msg_type_e msg_type, sn_coap_msg_code_e msg_code, const char *uri, sn_coap_content_format_e cont_type,
00088                                                       const uint8_t *payload_ptr, uint16_t payload_len, coap_message_handler_response_recv *request_response_cb);
00089 
00090 extern int8_t coap_message_handler_response_send(coap_msg_handler_t *handle, int8_t service_id, uint8_t options, sn_coap_hdr_s *request_ptr, sn_coap_msg_code_e message_code,
00091         sn_coap_content_format_e content_type, const uint8_t *payload_ptr, uint16_t payload_len);
00092 
00093 extern int8_t coap_message_handler_request_delete(coap_msg_handler_t *handle, int8_t service_id, uint16_t msg_id);
00094 
00095 extern int8_t coap_message_handler_exec(coap_msg_handler_t *handle, uint32_t current_time);
00096 
00097 extern void transaction_delete(coap_transaction_t *this);
00098 
00099 extern void transactions_delete_all(uint8_t *address_ptr, uint16_t port);
00100 
00101 extern int8_t coap_message_handler_response_send_by_msg_id(coap_msg_handler_t *handle, int8_t service_id, uint8_t options, uint16_t msg_id, sn_coap_msg_code_e message_code,
00102         sn_coap_content_format_e content_type, const uint8_t *payload_ptr,uint16_t payload_len);
00103 
00104 #endif