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mbed client lightswitch demo
Dependencies: mbed Socket lwip-eth lwip-sys lwip
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Diff: mbed-client-c/source/libCoap/src/sn_coap_protocol.c
- Revision:
- 11:cada08fc8a70
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-client-c/source/libCoap/src/sn_coap_protocol.c Thu Jun 09 17:08:36 2016 +0000 @@ -0,0 +1,2288 @@ +/* + * 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_coap_protocol.c + * + * \brief CoAP Protocol implementation + * + * Functionality: CoAP Protocol + * + */ + + +/* * * * * * * * * * * * * * */ +/* * * * INCLUDE FILES * * * */ +/* * * * * * * * * * * * * * */ + +#include <stdio.h> +#include <stdlib.h> /* For libary malloc() */ +#include <string.h> /* For memset() and memcpy() */ +#ifdef __linux__ +#include <time.h> +#endif + +#include "ns_types.h" +#include "sn_nsdl.h" +#include "sn_coap_protocol.h" +#include "sn_coap_header_internal.h" +#include "sn_coap_protocol_internal.h" + +/* * * * * * * * * * * * * * * * * * * * */ +/* * * * LOCAL FUNCTION PROTOTYPES * * * */ +/* * * * * * * * * * * * * * * * * * * * */ + +static void sn_coap_protocol_send_rst(struct coap_s *handle, uint16_t msg_id, sn_nsdl_addr_s *addr_ptr, void *param); +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */ +static void sn_coap_protocol_linked_list_duplication_info_store(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id); +static int8_t sn_coap_protocol_linked_list_duplication_info_search(sn_nsdl_addr_s *scr_addr_ptr, uint16_t msg_id); +static void sn_coap_protocol_linked_list_duplication_info_remove(struct coap_s *handle, uint8_t *scr_addr_ptr, uint16_t port, uint16_t msg_id); +static void sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle); +#endif +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ +static void sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr); +static void sn_coap_protocol_linked_list_blockwise_payload_store(struct coap_s *handle, sn_nsdl_addr_s *addr_ptr, uint16_t stored_payload_len, uint8_t *stored_payload_ptr); +static uint8_t *sn_coap_protocol_linked_list_blockwise_payload_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length); +static void sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle, coap_blockwise_payload_s *removed_payload_ptr); +static void sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle); +static uint16_t sn_coap_protocol_linked_list_blockwise_payloads_get_len(sn_nsdl_addr_s *src_addr_ptr); +static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle); +static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, sn_coap_hdr_s *received_coap_msg_ptr, void *param); +static int8_t sn_coap_convert_block_size(uint16_t block_size); +static sn_coap_hdr_s *sn_coap_protocol_copy_header(struct coap_s *handle, sn_coap_hdr_s *source_header_ptr); +#endif +#if ENABLE_RESENDINGS +static void sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param); +static sn_nsdl_transmit_s *sn_coap_protocol_linked_list_send_msg_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id); +static void sn_coap_protocol_linked_list_send_msg_remove(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id); +static coap_send_msg_s *sn_coap_protocol_allocate_mem_for_msg(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t packet_data_len); +static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr); +static uint16_t sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr); +#endif + +/* * * * * * * * * * * * * * * * * */ +/* * * * GLOBAL DECLARATIONS * * * */ +/* * * * * * * * * * * * * * * * * */ +static uint16_t message_id; + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ +static coap_send_msg_list_t NS_LIST_NAME_INIT(global_linked_list_resent_msgs); /* Active resending messages are stored to this Linked list */ +static uint16_t global_count_resent_msgs = 0; +#endif +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */ +static coap_duplication_info_list_t NS_LIST_NAME_INIT(global_linked_list_duplication_msgs); /* Messages for duplicated messages detection is stored to this Linked list */ +static uint16_t global_count_duplication_msgs = 0; + +#endif +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwise is not used at all, this part of code will not be compiled */ +static coap_blockwise_msg_list_t NS_LIST_NAME_INIT(global_linked_list_blockwise_sent_msgs); /* Blockwise message to to be sent is stored to this Linked list */ +static coap_blockwise_payload_list_t NS_LIST_NAME_INIT(global_linked_list_blockwise_received_payloads); /* Blockwise payload to to be received is stored to this Linked list */ +#endif + +static uint32_t global_system_time = 0; /* System time seconds */ + +uint16_t sn_coap_block_data_size = 0; + +uint8_t sn_coap_resending_queue_msgs = 0; +uint8_t sn_coap_resending_queue_bytes = 0; +uint8_t sn_coap_resending_count = 0; +uint8_t sn_coap_resending_intervall = 0; + +uint8_t sn_coap_duplication_buffer_size = 0; + + +int8_t sn_coap_protocol_destroy(struct coap_s *handle) +{ + if (handle == NULL) { + return -1; + } +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + + sn_coap_protocol_clear_retransmission_buffer(handle); + +#endif + +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */ + ns_list_foreach_safe(coap_duplication_info_s, tmp, &global_linked_list_duplication_msgs) { + if (tmp->coap == handle) { + if (tmp->addr_ptr) { + handle->sn_coap_protocol_free(tmp->addr_ptr); + tmp->addr_ptr = 0; + } + ns_list_remove(&global_linked_list_duplication_msgs, tmp); + global_count_duplication_msgs--; + handle->sn_coap_protocol_free(tmp); + tmp = 0; + } + } +#endif + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwise is not used at all, this part of code will not be compiled */ + ns_list_foreach_safe(coap_blockwise_msg_s, tmp, &global_linked_list_blockwise_sent_msgs) { + if (tmp->coap == handle) { + if (tmp->coap_msg_ptr) { + if (tmp->coap_msg_ptr->payload_ptr) { + handle->sn_coap_protocol_free(tmp->coap_msg_ptr->payload_ptr); + tmp->coap_msg_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(tmp->coap, tmp->coap_msg_ptr); + } + ns_list_remove(&global_linked_list_blockwise_sent_msgs, tmp); + handle->sn_coap_protocol_free(tmp); + tmp = 0; + } + } + ns_list_foreach_safe(coap_blockwise_payload_s, tmp, &global_linked_list_blockwise_received_payloads) { + if (tmp->coap == handle) { + if (tmp->addr_ptr) { + handle->sn_coap_protocol_free(tmp->addr_ptr); + tmp->addr_ptr = 0; + } + if (tmp->payload_ptr) { + handle->sn_coap_protocol_free(tmp->payload_ptr); + tmp->payload_ptr = 0; + } + ns_list_remove(&global_linked_list_blockwise_received_payloads, tmp); + handle->sn_coap_protocol_free(tmp); + tmp = 0; + } + } +#endif + + handle->sn_coap_protocol_free(handle); + handle = 0; + return 0; +} + +struct coap_s *sn_coap_protocol_init(void *(*used_malloc_func_ptr)(uint16_t), void (*used_free_func_ptr)(void *), + uint8_t (*used_tx_callback_ptr)(uint8_t *, uint16_t, sn_nsdl_addr_s *, void *), + int8_t (*used_rx_callback_ptr)(sn_coap_hdr_s *, sn_nsdl_addr_s *, void *param)) +{ + /* Check paramters */ + if ((used_malloc_func_ptr == NULL) || (used_free_func_ptr == NULL) || (used_tx_callback_ptr == NULL)) { + return NULL; + } + + struct coap_s *handle; + handle = used_malloc_func_ptr(sizeof(struct coap_s)); + if (handle == NULL) { + return NULL; + } + + memset(handle, 0, sizeof(struct coap_s)); + + /* * * Handle tx callback * * */ + handle->sn_coap_tx_callback = used_tx_callback_ptr; + + handle->sn_coap_protocol_free = used_free_func_ptr; + handle->sn_coap_protocol_malloc = used_malloc_func_ptr; + + /* * * Handle rx callback * * */ + /* If pointer = 0, then re-sending does not return error when failed */ + handle->sn_coap_rx_callback = used_rx_callback_ptr; + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + + /* * * * Create Linked list for storing active resending messages * * * */ + sn_coap_resending_queue_msgs = SN_COAP_RESENDING_QUEUE_SIZE_MSGS; + sn_coap_resending_queue_bytes = SN_COAP_RESENDING_QUEUE_SIZE_BYTES; + sn_coap_resending_intervall = DEFAULT_RESPONSE_TIMEOUT; + sn_coap_resending_count = SN_COAP_RESENDING_MAX_COUNT; + +#endif /* ENABLE_RESENDINGS */ + +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */ + /* * * * Create Linked list for storing Duplication info * * * */ + sn_coap_duplication_buffer_size = SN_COAP_DUPLICATION_MAX_MSGS_COUNT; +#endif + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + + sn_coap_block_data_size = SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE; + +#endif /* ENABLE_RESENDINGS */ + + /* Randomize global message ID */ +#if defined __linux__ || defined TARGET_LIKE_MBED + srand(rand()^time(NULL)); + + message_id = rand() % 400 + 100; +#else + message_id = 100; +#endif + + return handle; +} + +int8_t sn_coap_protocol_set_block_size(uint16_t block_size) +{ +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE + switch (block_size) { + case 0: + case 16: + case 32: + case 64: + case 128: + case 256: + case 512: + case 1024: + sn_coap_block_data_size = block_size; + return 0; + default: + break; + } +#endif + return -1; + +} + +int8_t sn_coap_protocol_set_duplicate_buffer_size(uint8_t message_count) +{ +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT + if (message_count <= SN_COAP_MAX_ALLOWED_DUPLICATION_MESSAGE_COUNT) { + sn_coap_duplication_buffer_size = message_count; + return 0; + } +#endif + return -1; +} + +int8_t sn_coap_protocol_set_retransmission_parameters(uint8_t resending_count, uint8_t resending_intervall) +{ +#if ENABLE_RESENDINGS + if (resending_count <= SN_COAP_MAX_ALLOWED_RESENDING_COUNT && + resending_intervall <= SN_COAP_MAX_ALLOWED_RESPONSE_TIMEOUT) { + sn_coap_resending_count = resending_count; + + if (resending_intervall == 0) { + sn_coap_resending_intervall = 1; + } else { + sn_coap_resending_intervall = resending_intervall; + } + return 0; + } +#endif + return -1; +} + +int8_t sn_coap_protocol_set_retransmission_buffer(uint8_t buffer_size_messages, uint16_t buffer_size_bytes) +{ +#if ENABLE_RESENDINGS + if (buffer_size_bytes <= SN_COAP_MAX_ALLOWED_RESENDING_BUFF_SIZE_BYTES && + buffer_size_messages <= SN_COAP_MAX_ALLOWED_RESENDING_BUFF_SIZE_MSGS ) { + sn_coap_resending_queue_bytes = buffer_size_bytes; + sn_coap_resending_queue_msgs = buffer_size_messages; + return 0; + } + +#endif + return -1; + +} + +void sn_coap_protocol_clear_retransmission_buffer(struct coap_s *handle) +{ +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + ns_list_foreach_safe(coap_send_msg_s, tmp, &global_linked_list_resent_msgs) { + if (tmp->send_msg_ptr) { + if (tmp->send_msg_ptr->dst_addr_ptr) { + if (tmp->send_msg_ptr->dst_addr_ptr->addr_ptr) { + handle->sn_coap_protocol_free(tmp->send_msg_ptr->dst_addr_ptr->addr_ptr); + tmp->send_msg_ptr->dst_addr_ptr->addr_ptr = 0; + } + handle->sn_coap_protocol_free(tmp->send_msg_ptr->dst_addr_ptr); + tmp->send_msg_ptr->dst_addr_ptr = 0; + } + if (tmp->send_msg_ptr->packet_ptr) { + handle->sn_coap_protocol_free(tmp->send_msg_ptr->packet_ptr); + tmp->send_msg_ptr->packet_ptr = 0; + } + handle->sn_coap_protocol_free(tmp->send_msg_ptr); + tmp->send_msg_ptr = 0; + } + ns_list_remove(&global_linked_list_resent_msgs, tmp); + --global_count_resent_msgs; + handle->sn_coap_protocol_free(tmp); + tmp = 0; + } +#endif +} + + +int16_t sn_coap_protocol_build(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, + uint8_t *dst_packet_data_ptr, sn_coap_hdr_s *src_coap_msg_ptr, void *param) +{ + int16_t byte_count_built = 0; +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + uint16_t original_payload_len = 0; +#endif + + /* * * * Check given pointers * * * */ + if ((dst_addr_ptr == NULL) || (dst_packet_data_ptr == NULL) || (src_coap_msg_ptr == NULL) || handle == NULL) { + return -2; + } + + if (dst_addr_ptr->addr_ptr == NULL) { + return -2; + } + + /* Check if built Message type is else than Acknowledgement or Reset i.e. message type is Confirmable or Non-confirmable */ + /* (for Acknowledgement and Reset messages is written same Message ID than was in the Request message) */ + if (src_coap_msg_ptr->msg_type != COAP_MSG_TYPE_ACKNOWLEDGEMENT && + src_coap_msg_ptr->msg_type != COAP_MSG_TYPE_RESET && + src_coap_msg_ptr->msg_id == 0) { + /* * * * Generate new Message ID and increase it by one * * * */ + src_coap_msg_ptr->msg_id = message_id; + message_id++; + if (message_id == 0) { + message_id = 1; + } + } + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + + /* If blockwising needed */ + if ((src_coap_msg_ptr->payload_len > sn_coap_block_data_size) && (sn_coap_block_data_size > 0)) { + /* * * * Add Blockwise option to send CoAP message * * */ + + if (src_coap_msg_ptr->options_list_ptr == NULL) { + /* Allocate memory for less used options */ + src_coap_msg_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + + if (src_coap_msg_ptr->options_list_ptr == NULL) { + return -2; + } + memset(src_coap_msg_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); + } + + + /* Check if Request message */ + if (src_coap_msg_ptr->msg_code < COAP_MSG_CODE_RESPONSE_CREATED) { + /* Add Blockwise option, use Block1 because Request payload */ + src_coap_msg_ptr->options_list_ptr->block1_len = 1; + if( src_coap_msg_ptr->options_list_ptr->block1_ptr ){ + handle->sn_coap_protocol_free(src_coap_msg_ptr->options_list_ptr->block1_ptr); + src_coap_msg_ptr->options_list_ptr->block1_ptr = 0; + } + src_coap_msg_ptr->options_list_ptr->block1_ptr = handle->sn_coap_protocol_malloc(1); + + if (src_coap_msg_ptr->options_list_ptr->block1_ptr == NULL) { + handle->sn_coap_protocol_free(src_coap_msg_ptr->options_list_ptr); + src_coap_msg_ptr->options_list_ptr = 0; + return -2; + } + + *(src_coap_msg_ptr->options_list_ptr->block1_ptr) = 0x08; /* First block (BLOCK NUMBER, 4 MSB bits) + More to come (MORE, 1 bit) */ + *(src_coap_msg_ptr->options_list_ptr->block1_ptr) |= sn_coap_convert_block_size(sn_coap_block_data_size); + + } else { /* Response message */ + /* Add Blockwise option, use Block2 because Response payload */ + src_coap_msg_ptr->options_list_ptr->block2_len = 1; + if( src_coap_msg_ptr->options_list_ptr->block2_ptr ){ + handle->sn_coap_protocol_free(src_coap_msg_ptr->options_list_ptr->block2_ptr); + src_coap_msg_ptr->options_list_ptr->block2_ptr = 0; + } + + src_coap_msg_ptr->options_list_ptr->block2_ptr = handle->sn_coap_protocol_malloc(1); + + if (src_coap_msg_ptr->options_list_ptr->block2_ptr == NULL) { + handle->sn_coap_protocol_free(src_coap_msg_ptr->options_list_ptr); + src_coap_msg_ptr->options_list_ptr = 0; + return -2; + } + + *(src_coap_msg_ptr->options_list_ptr->block2_ptr) = 0x08; /* First block (BLOCK NUMBER, 4 MSB bits) + More to come (MORE, 1 bit) */ + *(src_coap_msg_ptr->options_list_ptr->block2_ptr) |= sn_coap_convert_block_size(sn_coap_block_data_size); + } + + /* Store original Payload length */ + original_payload_len = src_coap_msg_ptr->payload_len; + + /* Change Payload length of send message because Payload is blockwised */ + src_coap_msg_ptr->payload_len = sn_coap_block_data_size; + } + +#endif + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + /* * * * Build Packet data from CoAP message by using CoAP Header builder * * * */ + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + + byte_count_built = sn_coap_builder(dst_packet_data_ptr, src_coap_msg_ptr); + + if (byte_count_built < 0) { + return byte_count_built; + } + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + + /* Check if built Message type was confirmable, only these messages are resent */ + if (src_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) { + /* Store message to Linked list for resending purposes */ + sn_coap_protocol_linked_list_send_msg_store(handle, dst_addr_ptr, byte_count_built, dst_packet_data_ptr, + global_system_time + (uint32_t)(sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR), + param); + } + +#endif /* ENABLE_RESENDINGS */ + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + + /* If blockwising needed */ + if ((original_payload_len > sn_coap_block_data_size) && (sn_coap_block_data_size > 0)) { + + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + /* * * * Manage rest blockwise messages sending by storing them to Linked list * * * */ + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + + coap_blockwise_msg_s *stored_blockwise_msg_ptr; + + stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s)); + if (!stored_blockwise_msg_ptr) { + //block paylaod save failed, only first block can be build. Perhaps we should return error. + return byte_count_built; + } + memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s)); + + /* Fill struct */ + stored_blockwise_msg_ptr->timestamp = global_system_time; + + stored_blockwise_msg_ptr->coap_msg_ptr = sn_coap_protocol_copy_header(handle, src_coap_msg_ptr); + if( stored_blockwise_msg_ptr->coap_msg_ptr == NULL ){ + handle->sn_coap_protocol_free(stored_blockwise_msg_ptr); + stored_blockwise_msg_ptr = 0; + return -2; + } + + stored_blockwise_msg_ptr->coap_msg_ptr->payload_len = original_payload_len; + stored_blockwise_msg_ptr->coap_msg_ptr->payload_ptr = handle->sn_coap_protocol_malloc(stored_blockwise_msg_ptr->coap_msg_ptr->payload_len); + + if (!stored_blockwise_msg_ptr->coap_msg_ptr->payload_ptr) { + //block payload save failed, only first block can be build. Perhaps we should return error. + sn_coap_parser_release_allocated_coap_msg_mem(handle, stored_blockwise_msg_ptr->coap_msg_ptr); + handle->sn_coap_protocol_free(stored_blockwise_msg_ptr); + stored_blockwise_msg_ptr = 0; + return byte_count_built; + } + memcpy(stored_blockwise_msg_ptr->coap_msg_ptr->payload_ptr, src_coap_msg_ptr->payload_ptr, stored_blockwise_msg_ptr->coap_msg_ptr->payload_len); + + stored_blockwise_msg_ptr->coap = handle; + + ns_list_add_to_end(&global_linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr); + } + + else if (src_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) { + /* Add message to linked list - response can be in blocks and we need header to build response.. */ + coap_blockwise_msg_s *stored_blockwise_msg_ptr; + + stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s)); + if (!stored_blockwise_msg_ptr) { + return byte_count_built; + } + memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s)); + + /* Fill struct */ + stored_blockwise_msg_ptr->timestamp = global_system_time; + + stored_blockwise_msg_ptr->coap_msg_ptr = sn_coap_protocol_copy_header(handle, src_coap_msg_ptr); + if( stored_blockwise_msg_ptr->coap_msg_ptr == NULL ){ + handle->sn_coap_protocol_free(stored_blockwise_msg_ptr); + stored_blockwise_msg_ptr = 0; + return -2; + } + + stored_blockwise_msg_ptr->coap = handle; + + ns_list_add_to_end(&global_linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr); + } + +#endif /* SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE */ + + /* * * * Return built CoAP message Packet data length * * * */ + return byte_count_built; +} + +sn_coap_hdr_s *sn_coap_protocol_parse(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t packet_data_len, uint8_t *packet_data_ptr, void *param) +{ + sn_coap_hdr_s *returned_dst_coap_msg_ptr = NULL; + coap_version_e coap_version = COAP_VERSION_UNKNOWN; + + /* * * * Check given pointer * * * */ + if (src_addr_ptr == NULL || src_addr_ptr->addr_ptr == NULL || + packet_data_ptr == NULL || handle == NULL) { + return NULL; + } + + /* * * * Parse Packet data to CoAP message by using CoAP Header parser * * * */ + returned_dst_coap_msg_ptr = sn_coap_parser(handle, packet_data_len, packet_data_ptr, &coap_version); + + /* Check status of returned pointer */ + if (returned_dst_coap_msg_ptr == NULL) { + /* Memory allocation error in parser */ + return NULL; + } + + /* * * * Check validity of parsed Header values * * * */ + if (sn_coap_header_validity_check(returned_dst_coap_msg_ptr, coap_version) != 0) { + /* If message code is in a reserved class (1, 6 or 7), send reset. Message code class is 3 MSB of the message code byte */ + if (((returned_dst_coap_msg_ptr->msg_code >> 5) == 1) || // if class == 1 + ((returned_dst_coap_msg_ptr->msg_code >> 5) == 6) || // if class == 6 + ((returned_dst_coap_msg_ptr->msg_code >> 5) == 7)) { // if class == 7 + sn_coap_protocol_send_rst(handle, returned_dst_coap_msg_ptr->msg_id, src_addr_ptr, handle); + } + + /* Release memory of CoAP message */ + sn_coap_parser_release_allocated_coap_msg_mem(handle, returned_dst_coap_msg_ptr); + + /* Return NULL because Header validity check failed */ + return NULL; + } + + /* Check if we need to send reset message */ + /* A recipient MUST acknowledge a Confirmable message with an Acknowledgement + message or, if it lacks context to process the message properly + (including the case where the message is Empty, uses a code with a + reserved class (1, 6 or 7), or has a message format error), MUST + reject it; rejecting a Confirmable message is effected by sending a + matching Reset message and otherwise ignoring it. */ + if (returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) { + /* CoAP ping */ + if (returned_dst_coap_msg_ptr->msg_code == COAP_MSG_CODE_EMPTY) { + sn_coap_protocol_send_rst(handle, returned_dst_coap_msg_ptr->msg_id, src_addr_ptr, param); + + /* Release memory of CoAP message */ + sn_coap_parser_release_allocated_coap_msg_mem(handle, returned_dst_coap_msg_ptr); + + /* Return NULL because Header validity check failed */ + return NULL; + } + } + +#if !SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is used, this part of code will not be compiled */ + /* If blockwising used in received message */ + if (returned_dst_coap_msg_ptr->options_list_ptr != NULL && + (returned_dst_coap_msg_ptr->options_list_ptr->block1_ptr != NULL || + returned_dst_coap_msg_ptr->options_list_ptr->block2_ptr != NULL)) { + /* Set returned status to User */ + returned_dst_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_REJECTED; + //todo: send response -> not implemented + return returned_dst_coap_msg_ptr; + } +#endif /* !SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE */ + +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication is used, this part of code will not be compiled */ + + /* * * * Manage received CoAP message duplicate detection * * * */ + + /* If no message duplication detected */ + if (sn_coap_protocol_linked_list_duplication_info_search(src_addr_ptr, returned_dst_coap_msg_ptr->msg_id) == -1) { + /* * * No Message duplication: Store received message for detecting later duplication * * */ + + /* Get count of stored duplication messages */ + uint16_t stored_duplication_msgs_count = global_count_duplication_msgs; + + /* Check if there is no room to store message for duplication detection purposes */ + if (stored_duplication_msgs_count >= sn_coap_duplication_buffer_size) { + /* Get oldest stored duplication message */ + coap_duplication_info_s *stored_duplication_info_ptr = ns_list_get_first(&global_linked_list_duplication_msgs); + + /* Remove oldest stored duplication message for getting room for new duplication message */ + sn_coap_protocol_linked_list_duplication_info_remove(handle, stored_duplication_info_ptr->addr_ptr, stored_duplication_info_ptr->port, stored_duplication_info_ptr->msg_id); + } + + /* Store Duplication info to Linked list */ + sn_coap_protocol_linked_list_duplication_info_store(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id); + } else { /* * * Message duplication detected * * */ + /* Set returned status to User */ + returned_dst_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_DUPLICATED_MSG; + + /* Because duplicate message, return with coap_status set */ + return returned_dst_coap_msg_ptr; + } +#endif + + /*** And here we check if message was block message ***/ + /*** If so, we call own block handling function and ***/ + /*** return to caller. ***/ +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE + + if (returned_dst_coap_msg_ptr->options_list_ptr != NULL && + (returned_dst_coap_msg_ptr->options_list_ptr->block1_ptr != NULL || + returned_dst_coap_msg_ptr->options_list_ptr->block2_ptr != NULL)) { + returned_dst_coap_msg_ptr = sn_coap_handle_blockwise_message(handle, src_addr_ptr, returned_dst_coap_msg_ptr, param); + } else { + /* Get ... */ + coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = NULL; + + ns_list_foreach(coap_blockwise_msg_s, msg, &global_linked_list_blockwise_sent_msgs) { + if (returned_dst_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) { + stored_blockwise_msg_temp_ptr = msg; + break; + } + } + + if (stored_blockwise_msg_temp_ptr) { + ns_list_remove(&global_linked_list_blockwise_sent_msgs, stored_blockwise_msg_temp_ptr); + + if (stored_blockwise_msg_temp_ptr->coap_msg_ptr) { + if(stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr){ + handle->sn_coap_protocol_free(stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr); + stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(stored_blockwise_msg_temp_ptr->coap, stored_blockwise_msg_temp_ptr->coap_msg_ptr); + } + + handle->sn_coap_protocol_free(stored_blockwise_msg_temp_ptr); + stored_blockwise_msg_temp_ptr = 0; + } + } + + if (!returned_dst_coap_msg_ptr) { + return NULL; + } + +#endif + + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + + /* Check if received Message type was acknowledgement */ + if ((returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_ACKNOWLEDGEMENT) || (returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_RESET)) { + /* * * * Manage CoAP message resending by removing active resending message from Linked list * * */ + + /* Get node count i.e. count of active resending messages */ + uint16_t stored_resending_msgs_count = global_count_resent_msgs; + + /* Check if there is ongoing active message resendings */ + if (stored_resending_msgs_count > 0) { + sn_nsdl_transmit_s *removed_msg_ptr = NULL; + + /* Check if received message was confirmation for some active resending message */ + + removed_msg_ptr = sn_coap_protocol_linked_list_send_msg_search(src_addr_ptr, returned_dst_coap_msg_ptr->msg_id); + + if (removed_msg_ptr != NULL) { + /* Remove resending message from active message resending Linked list */ + sn_coap_protocol_linked_list_send_msg_remove(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id); + } + } + } +#endif /* ENABLE_RESENDINGS */ + + /* * * * Return parsed CoAP message * * * */ + return (returned_dst_coap_msg_ptr); +} + + +int8_t sn_coap_protocol_exec(struct coap_s *handle, uint32_t current_time) +{ + /* * * * Store current System time * * * */ + global_system_time = current_time; + + if( !handle ){ + return -1; + } + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE + /* * * * Remove old blocwise data * * * */ + sn_coap_protocol_linked_list_blockwise_remove_old_data(handle); +#endif + + +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT + /* * * * Remove old duplication messages * * * */ + sn_coap_protocol_linked_list_duplication_info_remove_old_ones(handle); +#endif + +#if ENABLE_RESENDINGS + /* Check if there is ongoing active message sendings */ + ns_list_foreach_safe(coap_send_msg_s, stored_msg_ptr, &global_linked_list_resent_msgs) { + // First check that msg belongs to handle + if( stored_msg_ptr->coap == handle ){ + /* Check if it is time to send this message */ + if (current_time >= stored_msg_ptr->resending_time) { + /* * * Increase Resending counter * * */ + stored_msg_ptr->resending_counter++; + + /* Check if all re-sendings have been done */ + if (stored_msg_ptr->resending_counter > sn_coap_resending_count) { + coap_version_e coap_version = COAP_VERSION_UNKNOWN; + + /* Get message ID from stored sending message */ + uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8); + temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3]; + + /* If RX callback have been defined.. */ + if (stored_msg_ptr->coap->sn_coap_rx_callback != 0) { + sn_coap_hdr_s *tmp_coap_hdr_ptr; + /* Parse CoAP message, set status and call RX callback */ + tmp_coap_hdr_ptr = sn_coap_parser(stored_msg_ptr->coap, stored_msg_ptr->send_msg_ptr->packet_len, stored_msg_ptr->send_msg_ptr->packet_ptr, &coap_version); + + if (tmp_coap_hdr_ptr != 0) { + tmp_coap_hdr_ptr->coap_status = COAP_STATUS_BUILDER_MESSAGE_SENDING_FAILED; + + stored_msg_ptr->coap->sn_coap_rx_callback(tmp_coap_hdr_ptr, stored_msg_ptr->send_msg_ptr->dst_addr_ptr, stored_msg_ptr->param); + + sn_coap_parser_release_allocated_coap_msg_mem(stored_msg_ptr->coap, tmp_coap_hdr_ptr); + } + } + /* Remove message from Linked list */ + sn_coap_protocol_linked_list_send_msg_remove(handle, stored_msg_ptr->send_msg_ptr->dst_addr_ptr, temp_msg_id); + } else { + /* Send message */ + stored_msg_ptr->coap->sn_coap_tx_callback(stored_msg_ptr->send_msg_ptr->packet_ptr, + stored_msg_ptr->send_msg_ptr->packet_len, stored_msg_ptr->send_msg_ptr->dst_addr_ptr, stored_msg_ptr->param); + + /* * * Count new Resending time * * */ + stored_msg_ptr->resending_time = current_time + (((uint32_t)(sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR)) << + stored_msg_ptr->resending_counter); + } + + } + } + } + +#endif /* ENABLE_RESENDINGS */ + + return 0; +} + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_send_msg_store(sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time) + * + * \brief Stores message to Linked list for sending purposes. + + * \param *dst_addr_ptr is pointer to destination address where CoAP message will be sent + * + * \param send_packet_data_len is length of Packet data to be stored + * + * \param *send_packet_data_ptr is Packet data to be stored + * + * \param sending_time is stored sending time + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, + uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param) +{ + + coap_send_msg_s *stored_msg_ptr = NULL; + + /* If both queue parameters are "0" or resending count is "0", then re-sending is disabled */ + if (((sn_coap_resending_queue_msgs == 0) && (sn_coap_resending_queue_bytes == 0)) || (sn_coap_resending_count == 0)) { + return; + } + + if (sn_coap_resending_queue_msgs > 0) { + if (global_count_resent_msgs >= sn_coap_resending_queue_msgs) { + return; + } + } + + /* Count resending queue size, if buffer size is defined */ + if (sn_coap_resending_queue_bytes > 0) { + if ((sn_coap_count_linked_list_size(&global_linked_list_resent_msgs) + send_packet_data_len) > sn_coap_resending_queue_bytes) { + return; + } + } + + /* Allocating memory for stored message */ + stored_msg_ptr = sn_coap_protocol_allocate_mem_for_msg(handle, dst_addr_ptr, send_packet_data_len); + + if (stored_msg_ptr == 0) { + return; + } + + /* Filling of coap_send_msg_s with initialization values */ + stored_msg_ptr->resending_counter = 0; + stored_msg_ptr->resending_time = sending_time; + + /* Filling of sn_nsdl_transmit_s */ + stored_msg_ptr->send_msg_ptr->protocol = SN_NSDL_PROTOCOL_COAP; + stored_msg_ptr->send_msg_ptr->packet_len = send_packet_data_len; + memcpy(stored_msg_ptr->send_msg_ptr->packet_ptr, send_packet_data_ptr, send_packet_data_len); + + /* Filling of sn_nsdl_addr_s */ + stored_msg_ptr->send_msg_ptr->dst_addr_ptr->type = dst_addr_ptr->type; + stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_len = dst_addr_ptr->addr_len; + memcpy(stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, dst_addr_ptr->addr_ptr, dst_addr_ptr->addr_len); + stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port = dst_addr_ptr->port; + + stored_msg_ptr->coap = handle; + stored_msg_ptr->param = param; + + /* Storing Resending message to Linked list */ + ns_list_add_to_end(&global_linked_list_resent_msgs, stored_msg_ptr); + ++global_count_resent_msgs; +} + +/**************************************************************************//** + * \fn static sn_nsdl_transmit_s *sn_coap_protocol_linked_list_send_msg_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id) + * + * \brief Searches stored resending message from Linked list + * + * \param *src_addr_ptr is searching key for searched message + * + * \param msg_id is searching key for searched message + * + * \return Return value is pointer to found stored resending message in Linked + * list or NULL if message not found + *****************************************************************************/ + +static sn_nsdl_transmit_s *sn_coap_protocol_linked_list_send_msg_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id) +{ + /* Loop all stored resending messages Linked list */ + ns_list_foreach(coap_send_msg_s, stored_msg_ptr, &global_linked_list_resent_msgs) { + /* Get message ID from stored resending message */ + uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8); + temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3]; + + /* If message's Message ID is same than is searched */ + if (temp_msg_id == msg_id) { + /* If message's Source address is same than is searched */ + if (0 == memcmp(src_addr_ptr->addr_ptr, stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, src_addr_ptr->addr_len)) { + /* If message's Source address port is same than is searched */ + if (stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port == src_addr_ptr->port) { + /* * * Message found, return pointer to that stored resending message * * * */ + return stored_msg_ptr->send_msg_ptr; + } + } + } + } + + /* Message not found */ + return NULL; +} +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_send_msg_remove(sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id) + * + * \brief Removes stored resending message from Linked list + * + * \param *src_addr_ptr is searching key for searched message + * \param msg_id is searching key for removed message + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_send_msg_remove(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id) +{ + /* Loop all stored resending messages in Linked list */ + ns_list_foreach(coap_send_msg_s, stored_msg_ptr, &global_linked_list_resent_msgs) { + /* Get message ID from stored resending message */ + uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8); + temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3]; + + /* If message's Message ID is same than is searched */ + if (temp_msg_id == msg_id) { + /* If message's Source address is same than is searched */ + if (0 == memcmp(src_addr_ptr->addr_ptr, stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, src_addr_ptr->addr_len)) { + /* If message's Source address port is same than is searched */ + if (stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port == src_addr_ptr->port) { + /* * * Message found * * */ + + /* Remove message from Linked list */ + ns_list_remove(&global_linked_list_resent_msgs, stored_msg_ptr); + --global_count_resent_msgs; + + /* Free memory of stored message */ + sn_coap_protocol_release_allocated_send_msg_mem(handle, stored_msg_ptr); + + return; + } + } + } + } +} +#endif /* ENABLE_RESENDINGS */ + + +static void sn_coap_protocol_send_rst(struct coap_s *handle, uint16_t msg_id, sn_nsdl_addr_s *addr_ptr, void *param) +{ + uint8_t packet_ptr[4]; + + /* Add CoAP version and message type */ + packet_ptr[0] = COAP_VERSION_1; + packet_ptr[0] |= COAP_MSG_TYPE_RESET; + + /* Add message code */ + packet_ptr[1] = COAP_MSG_CODE_EMPTY; + + /* Add message ID */ + packet_ptr[2] = msg_id >> 8; + packet_ptr[3] = (uint8_t)msg_id; + + /* Send RST */ + handle->sn_coap_tx_callback(packet_ptr, 4, addr_ptr, param); + +} +#if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */ + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_duplication_info_store(sn_nsdl_addr_s *addr_ptr, uint16_t msg_id) + * + * \brief Stores Duplication info to Linked list + * + * \param msg_id is Message ID to be stored + * \param *addr_ptr is pointer to Address information to be stored + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_duplication_info_store(struct coap_s *handle, sn_nsdl_addr_s *addr_ptr, + uint16_t msg_id) +{ + coap_duplication_info_s *stored_duplication_info_ptr = NULL; + + /* * * * Allocating memory for stored Duplication info * * * */ + + /* Allocate memory for stored Duplication info's structure */ + stored_duplication_info_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_duplication_info_s)); + + if (stored_duplication_info_ptr == NULL) { + return; + } + + /* Allocate memory for stored Duplication info's address */ + stored_duplication_info_ptr->addr_ptr = handle->sn_coap_protocol_malloc(addr_ptr->addr_len); + + if (stored_duplication_info_ptr->addr_ptr == NULL) { + handle->sn_coap_protocol_free(stored_duplication_info_ptr); + stored_duplication_info_ptr = 0; + return; + } + + /* * * * Filling fields of stored Duplication info * * * */ + + stored_duplication_info_ptr->timestamp = global_system_time; + stored_duplication_info_ptr->addr_len = addr_ptr->addr_len; + memcpy(stored_duplication_info_ptr->addr_ptr, addr_ptr->addr_ptr, addr_ptr->addr_len); + stored_duplication_info_ptr->port = addr_ptr->port; + stored_duplication_info_ptr->msg_id = msg_id; + + stored_duplication_info_ptr->coap = handle; + + /* * * * Storing Duplication info to Linked list * * * */ + + ns_list_add_to_end(&global_linked_list_duplication_msgs, stored_duplication_info_ptr); + ++global_count_duplication_msgs; +} + +/**************************************************************************//** + * \fn static int8_t sn_coap_protocol_linked_list_duplication_info_search(sn_nsdl_addr_s *addr_ptr, uint16_t msg_id) + * + * \brief Searches stored message from Linked list (Address and Message ID as key) + * + * \param *addr_ptr is pointer to Address key to be searched + * \param msg_id is Message ID key to be searched + * + * \return Return value is 0 when message found and -1 if not found + *****************************************************************************/ + +static int8_t sn_coap_protocol_linked_list_duplication_info_search(sn_nsdl_addr_s *addr_ptr, + uint16_t msg_id) +{ + /* Loop all nodes in Linked list for searching Message ID */ + ns_list_foreach(coap_duplication_info_s, stored_duplication_info_ptr, &global_linked_list_duplication_msgs) { + /* If message's Message ID is same than is searched */ + if (stored_duplication_info_ptr->msg_id == msg_id) { + /* If message's Source address is same than is searched */ + if (0 == memcmp(addr_ptr->addr_ptr, stored_duplication_info_ptr->addr_ptr, addr_ptr->addr_len)) { + /* If message's Source address port is same than is searched */ + if (stored_duplication_info_ptr->port == addr_ptr->port) { + /* * * Correct Duplication info found * * * */ + return 0; + } + } + } + } + + return -1; +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_duplication_info_remove(struct coap_s *handle, uint8_t *addr_ptr, uint16_t port, uint16_t msg_id) + * + * \brief Removes stored Duplication info from Linked list + * + * \param *addr_ptr is pointer to Address key to be removed + * + * \param port is Port key to be removed + * + * \param msg_id is Message ID key to be removed + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_duplication_info_remove(struct coap_s *handle, uint8_t *addr_ptr, uint16_t port, uint16_t msg_id) +{ + /* Loop all stored duplication messages in Linked list */ + ns_list_foreach(coap_duplication_info_s, removed_duplication_info_ptr, &global_linked_list_duplication_msgs) { + /* If message's Address is same than is searched */ + if (handle == removed_duplication_info_ptr->coap && 0 == memcmp(addr_ptr, removed_duplication_info_ptr->addr_ptr, removed_duplication_info_ptr->addr_len)) { + /* If message's Address prt is same than is searched */ + if (removed_duplication_info_ptr->port == port) { + /* If Message ID is same than is searched */ + if (removed_duplication_info_ptr->msg_id == msg_id) { + /* * * * Correct Duplication info found, remove it from Linked list * * * */ + ns_list_remove(&global_linked_list_duplication_msgs, removed_duplication_info_ptr); + --global_count_duplication_msgs; + + /* Free memory of stored Duplication info */ + handle->sn_coap_protocol_free(removed_duplication_info_ptr->addr_ptr); + removed_duplication_info_ptr->addr_ptr = 0; + handle->sn_coap_protocol_free(removed_duplication_info_ptr); + removed_duplication_info_ptr = 0; + + return; + } + } + } + } +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle) + * + * \brief Removes old stored Duplication detection infos from Linked list + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle) +{ + /* Loop all stored duplication messages in Linked list */ + ns_list_foreach_safe(coap_duplication_info_s, removed_duplication_info_ptr, &global_linked_list_duplication_msgs) { + if ((global_system_time - removed_duplication_info_ptr->timestamp) > SN_COAP_DUPLICATION_MAX_TIME_MSGS_STORED) { + /* * * * Old Duplication info found, remove it from Linked list * * * */ + ns_list_remove(&global_linked_list_duplication_msgs, removed_duplication_info_ptr); + --global_count_duplication_msgs; + + /* Free memory of stored Duplication info */ + handle->sn_coap_protocol_free(removed_duplication_info_ptr->addr_ptr); + removed_duplication_info_ptr->addr_ptr = 0; + handle->sn_coap_protocol_free(removed_duplication_info_ptr); + removed_duplication_info_ptr = 0; + } + } +} + +#endif /* SN_COAP_DUPLICATION_MAX_MSGS_COUNT */ + +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr) + * + * \brief Removes stored blockwise message from Linked list + * + * \param removed_msg_ptr is message to be removed + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr) +{ + if( removed_msg_ptr->coap == handle ){ + ns_list_remove(&global_linked_list_blockwise_sent_msgs, removed_msg_ptr); + + if( removed_msg_ptr->coap_msg_ptr ){ + if (removed_msg_ptr->coap_msg_ptr->payload_ptr) { + handle->sn_coap_protocol_free(removed_msg_ptr->coap_msg_ptr->payload_ptr); + removed_msg_ptr->coap_msg_ptr->payload_ptr = 0; + } + + sn_coap_parser_release_allocated_coap_msg_mem(handle, removed_msg_ptr->coap_msg_ptr); + } + + handle->sn_coap_protocol_free(removed_msg_ptr); + removed_msg_ptr = 0; + } +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_blockwise_payload_store(sn_nsdl_addr_s *addr_ptr, uint16_t stored_payload_len, uint8_t *stored_payload_ptr) + * + * \brief Stores blockwise payload to Linked list + * + * \param *addr_ptr is pointer to Address information to be stored + * \param stored_payload_len is length of stored Payload + * \param *stored_payload_ptr is pointer to stored Payload + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_blockwise_payload_store(struct coap_s *handle, sn_nsdl_addr_s *addr_ptr, + uint16_t stored_payload_len, + uint8_t *stored_payload_ptr) +{ + if (!addr_ptr || !stored_payload_len || !stored_payload_ptr) { + return; + } + + coap_blockwise_payload_s *stored_blockwise_payload_ptr = NULL; + + /* * * * Allocating memory for stored Payload * * * */ + + /* Allocate memory for stored Payload's structure */ + stored_blockwise_payload_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_payload_s)); + + if (stored_blockwise_payload_ptr == NULL) { + return; + } + + /* Allocate memory for stored Payload's data */ + stored_blockwise_payload_ptr->payload_ptr = handle->sn_coap_protocol_malloc(stored_payload_len); + + if (stored_blockwise_payload_ptr->payload_ptr == NULL) { + handle->sn_coap_protocol_free(stored_blockwise_payload_ptr); + stored_blockwise_payload_ptr = 0; + return; + } + + /* Allocate memory for stored Payload's address */ + stored_blockwise_payload_ptr->addr_ptr = handle->sn_coap_protocol_malloc(addr_ptr->addr_len); + + if (stored_blockwise_payload_ptr->addr_ptr == NULL) { + handle->sn_coap_protocol_free(stored_blockwise_payload_ptr->payload_ptr); + stored_blockwise_payload_ptr->payload_ptr = 0; + handle->sn_coap_protocol_free(stored_blockwise_payload_ptr); + stored_blockwise_payload_ptr = 0; + + return; + } + + /* * * * Filling fields of stored Payload * * * */ + + stored_blockwise_payload_ptr->timestamp = global_system_time; + + memcpy(stored_blockwise_payload_ptr->addr_ptr, addr_ptr->addr_ptr, addr_ptr->addr_len); + stored_blockwise_payload_ptr->port = addr_ptr->port; + memcpy(stored_blockwise_payload_ptr->payload_ptr, stored_payload_ptr, stored_payload_len); + stored_blockwise_payload_ptr->payload_len = stored_payload_len; + + stored_blockwise_payload_ptr->coap = handle; + + /* * * * Storing Payload to Linked list * * * */ + + ns_list_add_to_end(&global_linked_list_blockwise_received_payloads, stored_blockwise_payload_ptr); +} + +/**************************************************************************//** + * \fn static uint8_t *sn_coap_protocol_linked_list_blockwise_payload_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length) + * + * \brief Searches stored blockwise payload from Linked list (Address as key) + * + * \param *addr_ptr is pointer to Address key to be searched + * \param *payload_length is pointer to returned Payload length + * + * \return Return value is pointer to found stored blockwise payload in Linked + * list or NULL if payload not found + *****************************************************************************/ + +static uint8_t *sn_coap_protocol_linked_list_blockwise_payload_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length) +{ + /* Loop all stored blockwise payloads in Linked list */ + ns_list_foreach(coap_blockwise_payload_s, stored_payload_info_ptr, &global_linked_list_blockwise_received_payloads) { + /* If payload's Source address is same than is searched */ + if (0 == memcmp(src_addr_ptr->addr_ptr, stored_payload_info_ptr->addr_ptr, src_addr_ptr->addr_len)) { + /* If payload's Source address port is same than is searched */ + if (stored_payload_info_ptr->port == src_addr_ptr->port) { + /* * * Correct Payload found * * * */ + *payload_length = stored_payload_info_ptr->payload_len; + + return stored_payload_info_ptr->payload_ptr; + } + } + } + + return NULL; +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle) + * + * \brief Removes current stored blockwise paylod from Linked list + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle) +{ + coap_blockwise_payload_s *removed_payload_ptr; + + /* Remove oldest node in Linked list*/ + removed_payload_ptr = ns_list_get_first(&global_linked_list_blockwise_received_payloads); + + if (removed_payload_ptr != NULL) { + sn_coap_protocol_linked_list_blockwise_payload_remove(handle, removed_payload_ptr); + } +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle, + * coap_blockwise_msg_s *removed_msg_ptr) + * + * \brief Removes stored blockwise payload from Linked list + * + * \param removed_payload_ptr is payload to be removed + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle, + coap_blockwise_payload_s *removed_payload_ptr) +{ + ns_list_remove(&global_linked_list_blockwise_received_payloads, removed_payload_ptr); + + /* Free memory of stored payload */ + if (removed_payload_ptr->addr_ptr != NULL) { + handle->sn_coap_protocol_free(removed_payload_ptr->addr_ptr); + removed_payload_ptr->addr_ptr = 0; + } + + if (removed_payload_ptr->payload_ptr != NULL) { + handle->sn_coap_protocol_free(removed_payload_ptr->payload_ptr); + removed_payload_ptr->payload_ptr = 0; + } + + handle->sn_coap_protocol_free(removed_payload_ptr); + removed_payload_ptr = 0; +} + +/**************************************************************************//** + * \fn static uint16_t sn_coap_protocol_linked_list_blockwise_payloads_get_len(sn_nsdl_addr_s *src_addr_ptr) + * + * \brief Counts length of Payloads in Linked list (Address as key) + * + * \param *addr_ptr is pointer to Address key + * + * \return Return value is length of Payloads as bytes + *****************************************************************************/ + +static uint16_t sn_coap_protocol_linked_list_blockwise_payloads_get_len(sn_nsdl_addr_s *src_addr_ptr) +{ + uint16_t ret_whole_payload_len = 0; + + /* Loop all stored blockwise payloads in Linked list */ + ns_list_foreach(coap_blockwise_payload_s, searched_payload_info_ptr, &global_linked_list_blockwise_received_payloads) { + /* If payload's Source address is same than is searched */ + if (0 == memcmp(src_addr_ptr->addr_ptr, searched_payload_info_ptr->addr_ptr, src_addr_ptr->addr_len)) { + /* If payload's Source address port is same than is searched */ + if (searched_payload_info_ptr->port == src_addr_ptr->port) { + /* * * Correct Payload found * * * */ + ret_whole_payload_len += searched_payload_info_ptr->payload_len; + } + } + } + + return ret_whole_payload_len; +} + +/**************************************************************************//** + * \fn static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle) + * + * \brief Removes old stored Blockwise messages and payloads from Linked list + *****************************************************************************/ + +static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle) +{ + /* Loop all stored Blockwise messages in Linked list */ + ns_list_foreach_safe(coap_blockwise_msg_s, removed_blocwise_msg_ptr, &global_linked_list_blockwise_sent_msgs) { + if ((global_system_time - removed_blocwise_msg_ptr->timestamp) > SN_COAP_BLOCKWISE_MAX_TIME_DATA_STORED) { + //TODO: Check do we need to check handle == removed_blocwise_msg_ptr->coap here? + + /* * * * Old Blockise message found, remove it from Linked list * * * */ + if( removed_blocwise_msg_ptr->coap_msg_ptr ){ + if(removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr){ + handle->sn_coap_protocol_free(removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr); + removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle, removed_blocwise_msg_ptr->coap_msg_ptr); + removed_blocwise_msg_ptr->coap_msg_ptr = 0; + } + sn_coap_protocol_linked_list_blockwise_msg_remove(handle, removed_blocwise_msg_ptr); + } + } + + /* Loop all stored Blockwise payloads in Linked list */ + ns_list_foreach_safe(coap_blockwise_payload_s, removed_blocwise_payload_ptr, &global_linked_list_blockwise_received_payloads) { + if ((global_system_time - removed_blocwise_payload_ptr->timestamp) > SN_COAP_BLOCKWISE_MAX_TIME_DATA_STORED) { + /* * * * Old Blockise payload found, remove it from Linked list * * * */ + sn_coap_protocol_linked_list_blockwise_payload_remove(handle, removed_blocwise_payload_ptr); + } + } +} + +#endif /* SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE */ + + +#if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */ +/***************************************************************************//** + * \fn int8_t sn_coap_protocol_allocate_mem_for_msg(sn_nsdl_addr_s *dst_addr_ptr, uint16_t packet_data_len, coap_send_msg_s *msg_ptr) + * + * \brief Allocates memory for given message (send or blockwise message) + * + * \param *dst_addr_ptr is pointer to destination address where message will be sent + * \param packet_data_len is length of allocated Packet data + * + * \return pointer to allocated struct + *****************************************************************************/ + +coap_send_msg_s *sn_coap_protocol_allocate_mem_for_msg(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t packet_data_len) +{ + + coap_send_msg_s *msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_send_msg_s)); + + if (msg_ptr == NULL) { + return 0; + } + + memset(msg_ptr, 0, sizeof(coap_send_msg_s)); + + msg_ptr->send_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_nsdl_transmit_s)); + + if (msg_ptr->send_msg_ptr == NULL) { + sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr); + return 0; + } + + memset(msg_ptr->send_msg_ptr, 0 , sizeof(sn_nsdl_transmit_s)); + + msg_ptr->send_msg_ptr->dst_addr_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_nsdl_addr_s)); + + if (msg_ptr->send_msg_ptr->dst_addr_ptr == NULL) { + sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr); + return 0; + } + + memset(msg_ptr->send_msg_ptr->dst_addr_ptr, 0, sizeof(sn_nsdl_addr_s)); + + msg_ptr->send_msg_ptr->packet_ptr = handle->sn_coap_protocol_malloc(packet_data_len); + + if (msg_ptr->send_msg_ptr->packet_ptr == NULL) { + sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr); + return 0; + } + + msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = handle->sn_coap_protocol_malloc(dst_addr_ptr->addr_len); + + if (msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr == NULL) { + sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr); + return 0; + } + + memset(msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, 0, dst_addr_ptr->addr_len); + + return msg_ptr; +} + + +/**************************************************************************//** + * \fn static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr) + * + * \brief Releases memory of given Sending message (coap_send_msg_s) + * + * \param *freed_send_msg_ptr is pointer to released Sending message + *****************************************************************************/ + +static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr) +{ + if (freed_send_msg_ptr != NULL) { + if (freed_send_msg_ptr->send_msg_ptr != NULL) { + if (freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr != NULL) { + if (freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr != NULL) { + handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr); + freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = 0; + } + + handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr); + freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr = 0; + } + + if (freed_send_msg_ptr->send_msg_ptr->packet_ptr != NULL) { + handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->packet_ptr); + freed_send_msg_ptr->send_msg_ptr->packet_ptr = 0; + } + + handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr); + freed_send_msg_ptr->send_msg_ptr = 0; + } + + handle->sn_coap_protocol_free(freed_send_msg_ptr); + freed_send_msg_ptr = 0; + } +} + +/**************************************************************************//** + * \fn static uint16_t sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr) + * + * \brief Counts total message size of all messages in linked list + * + * \param const coap_send_msg_list_t *linked_list_ptr pointer to linked list + *****************************************************************************/ +static uint16_t sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr) +{ + uint16_t total_size = 0; + + ns_list_foreach(coap_send_msg_s, stored_msg_ptr, linked_list_ptr) { + if (stored_msg_ptr->send_msg_ptr) { + total_size += stored_msg_ptr->send_msg_ptr->packet_len; + } + } + + return total_size; +} + +#endif +#if SN_COAP_BLOCKWISE_MAX_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + +/**************************************************************************//** + * \fn static int8_t sn_coap_handle_blockwise_message(void) + * + * \brief Handles all received blockwise messages + * + * \param *src_addr_ptr pointer to source address information struct + * \param *received_coap_msg_ptr pointer to parsed CoAP message structure + *****************************************************************************/ + +static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, sn_coap_hdr_s *received_coap_msg_ptr, void *param) +{ + sn_coap_hdr_s *src_coap_blockwise_ack_msg_ptr = NULL; + uint16_t dst_packed_data_needed_mem = 0; + uint8_t *dst_ack_packet_data_ptr = NULL; + uint8_t block_temp = 0; + + uint16_t original_payload_len = 0; + uint8_t *original_payload_ptr = NULL; + + /* Block1 Option in a request (e.g., PUT or POST) */ + // Blocked request sending, received ACK, sending next block.. + if (received_coap_msg_ptr->options_list_ptr->block1_ptr) { + if (received_coap_msg_ptr->msg_code > COAP_MSG_CODE_REQUEST_DELETE) { + if (*(received_coap_msg_ptr->options_list_ptr->block1_ptr + (received_coap_msg_ptr->options_list_ptr->block1_len - 1)) & 0x08) { + coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = NULL; + + /* Get */ + ns_list_foreach(coap_blockwise_msg_s, msg, &global_linked_list_blockwise_sent_msgs) { + if (msg->coap_msg_ptr && received_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) { + stored_blockwise_msg_temp_ptr = msg; + break; + } + } + + if (stored_blockwise_msg_temp_ptr) { + /* Build response message */ + + uint16_t block_size = 1; + uint32_t block_number = 0; + + /* Get block option parameters from received message */ + if (received_coap_msg_ptr->options_list_ptr->block1_len == 3) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block1_ptr) << 12; + block_number |= *(received_coap_msg_ptr->options_list_ptr->block1_ptr + 1) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block1_ptr + 2)) >> 4; + } + + else if (received_coap_msg_ptr->options_list_ptr->block1_len == 2) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block1_ptr) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block1_ptr + 1)) >> 4; + } else if (received_coap_msg_ptr->options_list_ptr->block1_len == 1) { + block_number = (*received_coap_msg_ptr->options_list_ptr->block1_ptr) >> 4; + } + + + block_temp = *(received_coap_msg_ptr->options_list_ptr->block1_ptr + (received_coap_msg_ptr->options_list_ptr->block1_len - 1)) & 0x07; + block_size = block_size << (block_temp + 4); + + + /* Build next block message */ + src_coap_blockwise_ack_msg_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr; + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr) { + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = 0; + + } + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + } + } else { + src_coap_blockwise_ack_msg_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + if (!src_coap_blockwise_ack_msg_ptr->options_list_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + memset(src_coap_blockwise_ack_msg_ptr->options_list_ptr, 0, (sizeof(sn_coap_options_list_s))); + } + + block_number++; + + if (block_number <= 0x0f) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len = 1; + } else if (block_number <= 0x0fff) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len = 2; + } else if (block_number <= 0x0fffff) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len = 3; + } + + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = handle->sn_coap_protocol_malloc(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len); + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr == 0) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len - 1)) = block_temp; + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr |= block_number << 4; + + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len == 3) { + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + 2) = block_number << 4; + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + 1) |= block_number >> 4; + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr |= block_number >> 12; + } else if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len == 2) { + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + 1) |= block_number << 4; + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr |= block_number >> 4; + } else { + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr |= block_number << 4; + } + + original_payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len; + original_payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr; + + if ((block_size * (block_number + 1)) > stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) { + src_coap_blockwise_ack_msg_ptr->payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len - (block_size * (block_number)); + src_coap_blockwise_ack_msg_ptr->payload_ptr = src_coap_blockwise_ack_msg_ptr->payload_ptr + (block_size * block_number); + } + + /* Not last block */ + else { + /* set more - bit */ + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len - 1)) |= 0x08; + src_coap_blockwise_ack_msg_ptr->payload_len = block_size; + src_coap_blockwise_ack_msg_ptr->payload_ptr = src_coap_blockwise_ack_msg_ptr->payload_ptr + (block_size * block_number); + } + + /* Build and send block message */ + dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size(src_coap_blockwise_ack_msg_ptr); + + dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem); + if (!dst_ack_packet_data_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(original_payload_ptr); + original_payload_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + stored_blockwise_msg_temp_ptr->coap_msg_ptr = NULL; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return NULL; + } + src_coap_blockwise_ack_msg_ptr->msg_id = message_id++; + if (message_id == 0) { + message_id = 1; + } + + sn_coap_builder(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr); + + handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param); + + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + + stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len = original_payload_len; + stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = original_payload_ptr; + + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_ACK; + } + } else { + // XXX what was this trying to free? + //sn_coap_protocol_linked_list_blockwise_msg_remove_current(); + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_ACK; + } + } + + // Blocked request receiving + else { + if (received_coap_msg_ptr->payload_len > sn_coap_block_data_size) { + received_coap_msg_ptr->payload_len = sn_coap_block_data_size; + } + + sn_coap_protocol_linked_list_blockwise_payload_store(handle, src_addr_ptr, received_coap_msg_ptr->payload_len, received_coap_msg_ptr->payload_ptr); + /* If not last block (more value is set) */ + /* Block option length can be 1-3 bytes. First 4-20 bits are for block number. Last 4 bits are ALWAYS more bit + block size. */ + if (*(received_coap_msg_ptr->options_list_ptr->block1_ptr + (received_coap_msg_ptr->options_list_ptr->block1_len - 1)) & 0x08) { + //send ack + src_coap_blockwise_ack_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_hdr_s)); + + if (src_coap_blockwise_ack_msg_ptr == NULL) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return NULL; + } + + memset(src_coap_blockwise_ack_msg_ptr, 0, sizeof(sn_coap_hdr_s)); + + src_coap_blockwise_ack_msg_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr == NULL) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return NULL; + } + + memset(src_coap_blockwise_ack_msg_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); + + if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) { + src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CONTENT; + } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_POST) { + src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CREATED; + } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT) { + src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CHANGED; + } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_DELETE) { + src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_DELETED; + } + + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len = received_coap_msg_ptr->options_list_ptr->block1_len; + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = handle->sn_coap_protocol_malloc(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len); + if (!src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = NULL; + return NULL; + } + + src_coap_blockwise_ack_msg_ptr->msg_type = COAP_MSG_TYPE_ACKNOWLEDGEMENT; + + memcpy(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr, received_coap_msg_ptr->options_list_ptr->block1_ptr, received_coap_msg_ptr->options_list_ptr->block1_len); + + /* Check block size */ + block_temp = (*(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len - 1)) & 0x07); + if (block_temp > sn_coap_convert_block_size(sn_coap_block_data_size)) { + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len - 1)) &= 0xF8; + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_len - 1)) |= sn_coap_convert_block_size(sn_coap_block_data_size); + } + + src_coap_blockwise_ack_msg_ptr->msg_id = received_coap_msg_ptr->msg_id; + + dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size(src_coap_blockwise_ack_msg_ptr); + + dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem); + if (!dst_ack_packet_data_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + return NULL; + } + + sn_coap_builder(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr); + + handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param); + + sn_coap_parser_release_allocated_coap_msg_mem(handle, src_coap_blockwise_ack_msg_ptr); + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVING; + + } else { + /* * * This is the last block when whole Blockwise payload from received * * */ + /* * * blockwise messages is gathered and returned to User * * */ + + /* Store last Blockwise payload to Linked list */ + uint16_t payload_len = 0; + uint8_t *payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(src_addr_ptr, &payload_len); + uint16_t whole_payload_len = sn_coap_protocol_linked_list_blockwise_payloads_get_len(src_addr_ptr); + uint8_t *temp_whole_payload_ptr = NULL; + + temp_whole_payload_ptr = handle->sn_coap_protocol_malloc(whole_payload_len); + if (!temp_whole_payload_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + + //TODO: This might cause crashes, but if not deleted leaks memory? + if( received_coap_msg_ptr->payload_ptr ){ + free(received_coap_msg_ptr->payload_ptr); + } + received_coap_msg_ptr->payload_ptr = temp_whole_payload_ptr; + received_coap_msg_ptr->payload_len = whole_payload_len; + + /* Copy stored Blockwise payloads to returned whole Blockwise payload pointer */ + while (payload_ptr != NULL) { + memcpy(temp_whole_payload_ptr, payload_ptr, payload_len); + + temp_whole_payload_ptr += payload_len; + + sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(handle); + payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(src_addr_ptr, &payload_len); + } + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED; + } + } + } + + + /* Block2 Option in a response (e.g., a 2.05 response for GET) */ + /* Message ID must be same than in received message */ + else { + //This is response to request we made + if (received_coap_msg_ptr->msg_code > COAP_MSG_CODE_REQUEST_DELETE) { + uint32_t block_number = 0; + + /* Store blockwise payload to Linked list */ + //todo: add block number to stored values - just to make sure all packets are in order + sn_coap_protocol_linked_list_blockwise_payload_store(handle, src_addr_ptr, received_coap_msg_ptr->payload_len, received_coap_msg_ptr->payload_ptr); + + /* If not last block (more value is set) */ + if (*(received_coap_msg_ptr->options_list_ptr->block2_ptr + (received_coap_msg_ptr->options_list_ptr->block2_len - 1)) & 0x08) { + coap_blockwise_msg_s *previous_blockwise_msg_ptr = NULL; + + //build and send ack + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVING; + + ns_list_foreach(coap_blockwise_msg_s, msg, &global_linked_list_blockwise_sent_msgs) { + if (received_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) { + previous_blockwise_msg_ptr = msg; + break; + } + } + + if (!previous_blockwise_msg_ptr || !previous_blockwise_msg_ptr->coap_msg_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + + src_coap_blockwise_ack_msg_ptr = (sn_coap_hdr_s*)handle->sn_coap_protocol_malloc(sizeof(sn_coap_hdr_s)); + if( !src_coap_blockwise_ack_msg_ptr ){ + return 0; + } + memset(src_coap_blockwise_ack_msg_ptr,0,sizeof(sn_coap_hdr_s)); + + ns_list_remove(&global_linked_list_blockwise_sent_msgs, previous_blockwise_msg_ptr); + if( previous_blockwise_msg_ptr->coap_msg_ptr ){ + if(previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr){ + handle->sn_coap_protocol_free(previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr); + previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle, previous_blockwise_msg_ptr->coap_msg_ptr); + previous_blockwise_msg_ptr->coap_msg_ptr = 0; + } + handle->sn_coap_protocol_free(previous_blockwise_msg_ptr); + previous_blockwise_msg_ptr = 0; + +// if (src_coap_blockwise_ack_msg_ptr->payload_ptr) { + +// src_coap_blockwise_ack_msg_ptr->payload_ptr = 0; +// src_coap_blockwise_ack_msg_ptr->payload_len = 0; +// } + + /* * * Then build CoAP Acknowledgement message * * */ + + src_coap_blockwise_ack_msg_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + if (!src_coap_blockwise_ack_msg_ptr->options_list_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + return 0; + } + memset(src_coap_blockwise_ack_msg_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); + + src_coap_blockwise_ack_msg_ptr->msg_id = message_id++; + if (message_id == 0) { + message_id = 1; + } + +// if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr) { +// handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); +// src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; +// } + + /* Update block option */ + block_temp = *(received_coap_msg_ptr->options_list_ptr->block2_ptr + (received_coap_msg_ptr->options_list_ptr->block2_len - 1)) & 0x07; + + if (received_coap_msg_ptr->options_list_ptr->block2_len == 3) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block2_ptr) << 12; + block_number |= *(received_coap_msg_ptr->options_list_ptr->block2_ptr + 1) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block2_ptr + 2)) >> 4; + } + + else if (received_coap_msg_ptr->options_list_ptr->block2_len == 2) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block2_ptr) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block2_ptr + 1)) >> 4; + } else if (received_coap_msg_ptr->options_list_ptr->block2_len == 1) { + block_number = (*received_coap_msg_ptr->options_list_ptr->block2_ptr) >> 4; + } + + block_number ++; + + if (block_number <= 0x0f) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len = 1; + } else if (block_number <= 0x0fff) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len = 2; + } else if (block_number <= 0x0fffff) { + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len = 3; + } + + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = handle->sn_coap_protocol_malloc(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len); + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr == 0) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len - 1)) = block_temp; + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len == 3) { + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr + 2) = block_number << 4; + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr + 1) |= block_number >> 4; + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr |= block_number >> 12; + } else if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len == 2) { + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr + 1) = block_number << 4; + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr |= block_number >> 4; + } else { + *src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr |= block_number << 4; + } + + /* Then get needed memory count for Packet data */ + dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size(src_coap_blockwise_ack_msg_ptr); + + /* Then allocate memory for Packet data */ + dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem); + + if (dst_ack_packet_data_ptr == NULL) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return NULL; + } + memset(dst_ack_packet_data_ptr, 0, dst_packed_data_needed_mem); + + /* * * Then build Acknowledgement message to Packed data * * */ + if ((sn_coap_builder(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr)) < 0) { + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return NULL; + } + + /* * * Save to linked list * * */ + coap_blockwise_msg_s *stored_blockwise_msg_ptr; + + stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s)); + if (!stored_blockwise_msg_ptr) { + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + src_coap_blockwise_ack_msg_ptr = 0; + sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr); + return 0; + } + memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s)); + + stored_blockwise_msg_ptr->timestamp = global_system_time; + + stored_blockwise_msg_ptr->coap_msg_ptr = src_coap_blockwise_ack_msg_ptr; + stored_blockwise_msg_ptr->coap = handle; + + ns_list_add_to_end(&global_linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr); + + /* * * Then release memory of CoAP Acknowledgement message * * */ + handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, + dst_packed_data_needed_mem, src_addr_ptr, param); + +#if ENABLE_RESENDINGS + sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr, + dst_packed_data_needed_mem, + dst_ack_packet_data_ptr, + global_system_time + (uint32_t)(sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR), param); +#endif + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + } + + //Last block received + else { + /* * * This is the last block when whole Blockwise payload from received * * */ + /* * * blockwise messages is gathered and returned to User * * */ + + /* Store last Blockwise payload to Linked list */ + uint16_t payload_len = 0; + uint8_t *payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(src_addr_ptr, &payload_len); + uint16_t whole_payload_len = sn_coap_protocol_linked_list_blockwise_payloads_get_len(src_addr_ptr); + uint8_t *temp_whole_payload_ptr = NULL; + + temp_whole_payload_ptr = handle->sn_coap_protocol_malloc(whole_payload_len); + if (!temp_whole_payload_ptr) { + return 0; + } + + received_coap_msg_ptr->payload_ptr = temp_whole_payload_ptr; + received_coap_msg_ptr->payload_len = whole_payload_len; + + /* Copy stored Blockwise payloads to returned whole Blockwise payload pointer */ + while (payload_ptr != NULL) { + memcpy(temp_whole_payload_ptr, payload_ptr, payload_len); + + temp_whole_payload_ptr += payload_len; + + sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(handle); + payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(src_addr_ptr, &payload_len); + } + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED; + + //todo: remove previous msg from list + } + + } + + //Now we send data to request + else { + //Get message by using block number + //NOTE: Getting the first from list might not be correct one + coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = ns_list_get_first(&global_linked_list_blockwise_sent_msgs); + if (stored_blockwise_msg_temp_ptr) { + uint16_t block_size = 1; + uint32_t block_number = 0; + + /* Resolve block parameters */ + if (received_coap_msg_ptr->options_list_ptr->block2_len == 3) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block2_ptr) << 12; + block_number |= *(received_coap_msg_ptr->options_list_ptr->block2_ptr + 1) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block2_ptr + 2)) >> 4; + } + + else if (received_coap_msg_ptr->options_list_ptr->block2_len == 2) { + block_number = *(received_coap_msg_ptr->options_list_ptr->block2_ptr) << 4; + block_number |= (*(received_coap_msg_ptr->options_list_ptr->block2_ptr + 1)) >> 4; + } else if (received_coap_msg_ptr->options_list_ptr->block2_len == 1) { + block_number = (*received_coap_msg_ptr->options_list_ptr->block2_ptr) >> 4; + } + + block_temp = *(received_coap_msg_ptr->options_list_ptr->block2_ptr + (received_coap_msg_ptr->options_list_ptr->block2_len - 1)) & 0x07; + block_size = block_size << (block_temp + 4); + + /* Build response message */ + src_coap_blockwise_ack_msg_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr; + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr) { + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1_ptr = 0; + + } + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr) { + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + } + } else { + src_coap_blockwise_ack_msg_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + if (!src_coap_blockwise_ack_msg_ptr->options_list_ptr) { + return 0; + } + memset(src_coap_blockwise_ack_msg_ptr->options_list_ptr, 0, (sizeof(sn_coap_options_list_s))); + } + + + src_coap_blockwise_ack_msg_ptr->msg_id = received_coap_msg_ptr->msg_id; + + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len = received_coap_msg_ptr->options_list_ptr->block2_len; + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = handle->sn_coap_protocol_malloc(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len); + + if (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr == NULL) { + if(src_coap_blockwise_ack_msg_ptr->payload_ptr){ + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->payload_ptr); + } + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + stored_blockwise_msg_temp_ptr->coap_msg_ptr = NULL; + src_coap_blockwise_ack_msg_ptr = 0; + return NULL; + } + memcpy(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr, received_coap_msg_ptr->options_list_ptr->block2_ptr, src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len); + + /* * Payload part * */ + + /* Check if last block */ + + original_payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len; + original_payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr; + + if ((block_size * (block_number + 1)) > stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) { + src_coap_blockwise_ack_msg_ptr->payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len - (block_size * block_number); + src_coap_blockwise_ack_msg_ptr->payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr + (block_size * block_number); + } + /* Not last block */ + else { + /* set more - bit */ + *(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr + (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_len - 1)) |= 0x08; + src_coap_blockwise_ack_msg_ptr->payload_len = block_size; + src_coap_blockwise_ack_msg_ptr->payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr + (block_size * block_number); + } + + /* Build and send block message */ + dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size(src_coap_blockwise_ack_msg_ptr); + + dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem); + if (!dst_ack_packet_data_ptr) { + if(original_payload_ptr){ + handle->sn_coap_protocol_free(original_payload_ptr); + original_payload_ptr = NULL; + } + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr); + src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0; + handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr); + stored_blockwise_msg_temp_ptr->coap_msg_ptr = NULL; + return NULL; + } + + sn_coap_builder(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr); + + handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param); + + handle->sn_coap_protocol_free(dst_ack_packet_data_ptr); + dst_ack_packet_data_ptr = 0; + + stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len = original_payload_len; + stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = original_payload_ptr; + + if ((block_size * (block_number + 1)) > stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) { + sn_coap_protocol_linked_list_blockwise_msg_remove(handle, stored_blockwise_msg_temp_ptr); + } + + received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_ACK; + } + } + } + return received_coap_msg_ptr; +} + +static int8_t sn_coap_convert_block_size(uint16_t block_size) +{ + if (block_size == 16) { + return 0; + } else if (block_size == 32) { + return 1; + } else if (block_size == 64) { + return 2; + } else if (block_size == 128) { + return 3; + } else if (block_size == 256) { + return 4; + } else if (block_size == 512) { + return 5; + } else if (block_size == 1024) { + return 6; + } + + return 0; +} + +static sn_coap_hdr_s *sn_coap_protocol_copy_header(struct coap_s *handle, sn_coap_hdr_s *source_header_ptr) +{ + sn_coap_hdr_s *destination_header_ptr; + + destination_header_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_hdr_s)); + if (!destination_header_ptr) { + return 0; + } + memset(destination_header_ptr, 0, sizeof(sn_coap_hdr_s)); + + destination_header_ptr->coap_status = source_header_ptr->coap_status; + destination_header_ptr->msg_type = source_header_ptr->msg_type; + destination_header_ptr->msg_code = source_header_ptr->msg_code; + destination_header_ptr->msg_id = source_header_ptr->msg_id; + + if (source_header_ptr->uri_path_ptr) { + destination_header_ptr->uri_path_len = source_header_ptr->uri_path_len; + destination_header_ptr->uri_path_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->uri_path_len); + if (!destination_header_ptr->uri_path_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->uri_path_ptr, source_header_ptr->uri_path_ptr, source_header_ptr->uri_path_len); + } + + if (source_header_ptr->token_ptr) { + destination_header_ptr->token_len = source_header_ptr->token_len; + destination_header_ptr->token_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->token_len); + if (!destination_header_ptr->token_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->token_ptr, source_header_ptr->token_ptr, source_header_ptr->token_len); + } + + if (source_header_ptr->content_type_ptr) { + destination_header_ptr->content_type_len = source_header_ptr->content_type_len; + destination_header_ptr->content_type_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->content_type_len); + if (!destination_header_ptr->content_type_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->content_type_ptr, source_header_ptr->content_type_ptr, source_header_ptr->content_type_len); + } + + /* Options list */ + if (source_header_ptr->options_list_ptr) { + destination_header_ptr->options_list_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_coap_options_list_s)); + if (!destination_header_ptr->options_list_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memset(destination_header_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); + + + if (source_header_ptr->options_list_ptr->max_age_ptr) { + destination_header_ptr->options_list_ptr->max_age_len = source_header_ptr->options_list_ptr->max_age_len; + destination_header_ptr->options_list_ptr->max_age_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->max_age_len); + if (!destination_header_ptr->options_list_ptr->max_age_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->max_age_ptr, source_header_ptr->options_list_ptr->max_age_ptr, source_header_ptr->options_list_ptr->max_age_len); + } + + if (source_header_ptr->options_list_ptr->proxy_uri_ptr) { + destination_header_ptr->options_list_ptr->proxy_uri_len = source_header_ptr->options_list_ptr->proxy_uri_len; + destination_header_ptr->options_list_ptr->proxy_uri_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->proxy_uri_len); + if (!destination_header_ptr->options_list_ptr->proxy_uri_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->proxy_uri_ptr, source_header_ptr->options_list_ptr->proxy_uri_ptr, source_header_ptr->options_list_ptr->proxy_uri_len); + } + + if (source_header_ptr->options_list_ptr->etag_ptr) { + destination_header_ptr->options_list_ptr->etag_len = source_header_ptr->options_list_ptr->etag_len; + destination_header_ptr->options_list_ptr->etag_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->etag_len); + if (!destination_header_ptr->options_list_ptr->etag_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->etag_ptr, source_header_ptr->options_list_ptr->etag_ptr, source_header_ptr->options_list_ptr->etag_len); + } + + if (source_header_ptr->options_list_ptr->uri_host_ptr) { + destination_header_ptr->options_list_ptr->uri_host_len = source_header_ptr->options_list_ptr->uri_host_len; + destination_header_ptr->options_list_ptr->uri_host_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->uri_host_len); + if (!destination_header_ptr->options_list_ptr->uri_host_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->uri_host_ptr, source_header_ptr->options_list_ptr->uri_host_ptr, source_header_ptr->options_list_ptr->uri_host_len); + } + + if (source_header_ptr->options_list_ptr->location_path_ptr) { + destination_header_ptr->options_list_ptr->location_path_len = source_header_ptr->options_list_ptr->location_path_len; + destination_header_ptr->options_list_ptr->location_path_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->location_path_len); + if (!destination_header_ptr->options_list_ptr->location_path_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->location_path_ptr, source_header_ptr->options_list_ptr->location_path_ptr, source_header_ptr->options_list_ptr->location_path_len); + } + + if (source_header_ptr->options_list_ptr->uri_port_ptr) { + destination_header_ptr->options_list_ptr->uri_port_len = source_header_ptr->options_list_ptr->uri_port_len; + destination_header_ptr->options_list_ptr->uri_port_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->uri_port_len); + if (!destination_header_ptr->options_list_ptr->uri_port_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->uri_port_ptr, source_header_ptr->options_list_ptr->uri_port_ptr, source_header_ptr->options_list_ptr->uri_port_len); + } + + if (source_header_ptr->options_list_ptr->location_query_ptr) { + destination_header_ptr->options_list_ptr->location_query_len = source_header_ptr->options_list_ptr->location_query_len; + destination_header_ptr->options_list_ptr->location_query_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->location_query_len); + if (!destination_header_ptr->options_list_ptr->location_query_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->location_query_ptr, source_header_ptr->options_list_ptr->location_query_ptr, source_header_ptr->options_list_ptr->location_query_len); + } + + destination_header_ptr->options_list_ptr->observe = source_header_ptr->options_list_ptr->observe; + + if (source_header_ptr->options_list_ptr->observe_ptr) { + destination_header_ptr->options_list_ptr->observe_len = source_header_ptr->options_list_ptr->observe_len; + destination_header_ptr->options_list_ptr->observe_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->observe_len); + if (!destination_header_ptr->options_list_ptr->observe_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->observe_ptr, source_header_ptr->options_list_ptr->observe_ptr, source_header_ptr->options_list_ptr->observe_len); + } + + if (source_header_ptr->options_list_ptr->accept_ptr) { + destination_header_ptr->options_list_ptr->accept_len = source_header_ptr->options_list_ptr->accept_len; + destination_header_ptr->options_list_ptr->accept_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->accept_len); + if (!destination_header_ptr->options_list_ptr->accept_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->accept_ptr, source_header_ptr->options_list_ptr->accept_ptr, source_header_ptr->options_list_ptr->accept_len); + } + + if (source_header_ptr->options_list_ptr->uri_query_ptr) { + destination_header_ptr->options_list_ptr->uri_query_len = source_header_ptr->options_list_ptr->uri_query_len; + destination_header_ptr->options_list_ptr->uri_query_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->uri_query_len); + if (!destination_header_ptr->options_list_ptr->uri_query_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->uri_query_ptr, source_header_ptr->options_list_ptr->uri_query_ptr, source_header_ptr->options_list_ptr->uri_query_len); + } + + if (source_header_ptr->options_list_ptr->block1_ptr) { + destination_header_ptr->options_list_ptr->block1_len = source_header_ptr->options_list_ptr->block1_len; + destination_header_ptr->options_list_ptr->block1_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->block1_len); + if (!destination_header_ptr->options_list_ptr->block1_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->block1_ptr, source_header_ptr->options_list_ptr->block1_ptr, source_header_ptr->options_list_ptr->block1_len); + } + + if (source_header_ptr->options_list_ptr->block2_ptr) { + destination_header_ptr->options_list_ptr->block2_len = source_header_ptr->options_list_ptr->block2_len; + destination_header_ptr->options_list_ptr->block2_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->block2_len); + if (!destination_header_ptr->options_list_ptr->block2_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr); + return 0; + } + memcpy(destination_header_ptr->options_list_ptr->block2_ptr, source_header_ptr->options_list_ptr->block2_ptr, source_header_ptr->options_list_ptr->block2_len); + } + } + + return destination_header_ptr; +} +#endif +