sn_coap_protocol.c

00001 /*
00002  * Copyright (c) 2011-2015 ARM Limited. All rights reserved.
00003  * SPDX-License-Identifier: Apache-2.0
00004  * Licensed under the Apache License, Version 2.0 (the License); you may
00005  * not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  * http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an AS IS BASIS, WITHOUT
00012  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 /**
00018  * \file sn_coap_protocol.c
00019  *
00020  * \brief CoAP Protocol implementation
00021  *
00022  * Functionality: CoAP Protocol
00023  *
00024  */
00025 
00026 
00027 /* * * * * * * * * * * * * * */
00028 /* * * * INCLUDE FILES * * * */
00029 /* * * * * * * * * * * * * * */
00030 
00031 #include <stdio.h>
00032 #include <stdlib.h> /* For libary malloc() */
00033 #include <string.h> /* For memset() and memcpy() */
00034 #if defined __linux__ || defined TARGET_LIKE_MBED
00035 #include <time.h>
00036 #endif
00037 
00038 #include "ns_types.h"
00039 #include "mbed-coap/sn_coap_protocol.h"
00040 #include "sn_coap_header_internal.h"
00041 #include "sn_coap_protocol_internal.h"
00042 #include "randLIB.h"
00043 #include "mbed-trace/mbed_trace.h"
00044 
00045 #define TRACE_GROUP "coap"
00046 /* * * * * * * * * * * * * * * * * * * * */
00047 /* * * * LOCAL FUNCTION PROTOTYPES * * * */
00048 /* * * * * * * * * * * * * * * * * * * * */
00049 
00050 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT/* If Message duplication detection is not used at all, this part of code will not be compiled */
00051 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, void *param);
00052 static coap_duplication_info_s *sn_coap_protocol_linked_list_duplication_info_search(struct coap_s *handle, sn_nsdl_addr_s *scr_addr_ptr, uint16_t msg_id);
00053 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);
00054 static void                  sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle);
00055 #endif
00056 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00057 static void                  sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr);
00058 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, uint32_t block_number);
00059 static uint8_t              *sn_coap_protocol_linked_list_blockwise_payload_search(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length);
00060 static bool                  sn_coap_protocol_linked_list_blockwise_payload_compare_block_number(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint32_t block_number);
00061 static void                  sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle, coap_blockwise_payload_s *removed_payload_ptr);
00062 static void                  sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle);
00063 static uint32_t              sn_coap_protocol_linked_list_blockwise_payloads_get_len(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr);
00064 static void                  sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle);
00065 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);
00066 static sn_coap_hdr_s        *sn_coap_protocol_copy_header(struct coap_s *handle, sn_coap_hdr_s *source_header_ptr);
00067 #endif
00068 #if ENABLE_RESENDINGS
00069 static uint8_t               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);
00070 static sn_nsdl_transmit_s   *sn_coap_protocol_linked_list_send_msg_search(struct coap_s *handle,sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id);
00071 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);
00072 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);
00073 static void                  sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr);
00074 static uint16_t              sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr);
00075 static uint32_t              sn_coap_calculate_new_resend_time(const uint32_t current_time, const uint8_t interval, const uint8_t counter);
00076 #endif
00077 
00078 /* * * * * * * * * * * * * * * * * */
00079 /* * * * GLOBAL DECLARATIONS * * * */
00080 /* * * * * * * * * * * * * * * * * */
00081 static uint16_t message_id;
00082 
00083 int8_t sn_coap_protocol_destroy(struct coap_s *handle)
00084 {
00085     if (handle == NULL) {
00086         return -1;
00087     }
00088 #if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */
00089 
00090     sn_coap_protocol_clear_retransmission_buffer(handle);
00091 
00092 #endif
00093 
00094 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */
00095     ns_list_foreach_safe(coap_duplication_info_s, tmp, &handle->linked_list_duplication_msgs) {
00096         if (tmp->coap == handle) {
00097             if (tmp->address) {
00098                 if (tmp->address->addr_ptr) {
00099                     handle->sn_coap_protocol_free(tmp->address->addr_ptr);
00100                     tmp->address->addr_ptr = 0;
00101                 }
00102                 handle->sn_coap_protocol_free(tmp->address);
00103                 tmp->address = 0;
00104             }
00105             if (tmp->packet_ptr) {
00106                 handle->sn_coap_protocol_free(tmp->packet_ptr);
00107                 tmp->packet_ptr = 0;
00108             }
00109             ns_list_remove(&handle->linked_list_duplication_msgs, tmp);
00110             handle->count_duplication_msgs--;
00111             handle->sn_coap_protocol_free(tmp);
00112             tmp = 0;
00113         }
00114     }
00115 
00116 #endif
00117 
00118 
00119 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwise is not used at all, this part of code will not be compiled */
00120     ns_list_foreach_safe(coap_blockwise_msg_s, tmp, &handle->linked_list_blockwise_sent_msgs) {
00121         if (tmp->coap == handle) {
00122             if (tmp->coap_msg_ptr) {
00123                 if (tmp->coap_msg_ptr->payload_ptr) {
00124                     handle->sn_coap_protocol_free(tmp->coap_msg_ptr->payload_ptr);
00125                     tmp->coap_msg_ptr->payload_ptr = 0;
00126                 }
00127                 sn_coap_parser_release_allocated_coap_msg_mem(tmp->coap, tmp->coap_msg_ptr);
00128             }
00129             ns_list_remove(&handle->linked_list_blockwise_sent_msgs, tmp);
00130             handle->sn_coap_protocol_free(tmp);
00131             tmp = 0;
00132         }
00133     }
00134     ns_list_foreach_safe(coap_blockwise_payload_s, tmp, &handle->linked_list_blockwise_received_payloads) {
00135         if (tmp->coap == handle) {
00136             if (tmp->addr_ptr) {
00137                 handle->sn_coap_protocol_free(tmp->addr_ptr);
00138                 tmp->addr_ptr = 0;
00139             }
00140             if (tmp->payload_ptr) {
00141                 handle->sn_coap_protocol_free(tmp->payload_ptr);
00142                 tmp->payload_ptr = 0;
00143             }
00144             ns_list_remove(&handle->linked_list_blockwise_received_payloads, tmp);
00145             handle->sn_coap_protocol_free(tmp);
00146             tmp = 0;
00147         }
00148     }
00149 #endif
00150 
00151     handle->sn_coap_protocol_free(handle);
00152     handle = 0;
00153     return 0;
00154 }
00155 
00156 struct coap_s *sn_coap_protocol_init(void *(*used_malloc_func_ptr)(uint16_t), void (*used_free_func_ptr)(void *),
00157                                      uint8_t (*used_tx_callback_ptr)(uint8_t *, uint16_t, sn_nsdl_addr_s *, void *),
00158                                      int8_t (*used_rx_callback_ptr)(sn_coap_hdr_s *, sn_nsdl_addr_s *, void *param))
00159 {
00160     /* Check paramters */
00161     if ((used_malloc_func_ptr == NULL) || (used_free_func_ptr == NULL) || (used_tx_callback_ptr == NULL)) {
00162         return NULL;
00163     }
00164 
00165     struct coap_s *handle;
00166     handle = used_malloc_func_ptr(sizeof(struct coap_s));
00167     if (handle == NULL) {
00168         return NULL;
00169     }
00170 
00171     memset(handle, 0, sizeof(struct coap_s));
00172 
00173     /* * * Handle tx callback * * */
00174     handle->sn_coap_tx_callback = used_tx_callback_ptr;
00175 
00176     handle->sn_coap_protocol_free = used_free_func_ptr;
00177     handle->sn_coap_protocol_malloc = used_malloc_func_ptr;
00178 
00179     /* * * Handle rx callback * * */
00180     /* If pointer = 0, then re-sending does not return error when failed */
00181     handle->sn_coap_rx_callback = used_rx_callback_ptr;
00182 
00183     // Handles internally all GET req responses
00184     handle->sn_coap_internal_block2_resp_handling = true;
00185 
00186 #if ENABLE_RESENDINGS  /* If Message resending is not used at all, this part of code will not be compiled */
00187     /* * * * Create Linked list for storing active resending messages  * * * */
00188     ns_list_init(&handle->linked_list_resent_msgs);
00189     handle->sn_coap_resending_queue_msgs = SN_COAP_RESENDING_QUEUE_SIZE_MSGS;
00190     handle->sn_coap_resending_queue_bytes = SN_COAP_RESENDING_QUEUE_SIZE_BYTES;
00191     handle->sn_coap_resending_intervall = DEFAULT_RESPONSE_TIMEOUT;
00192     handle->sn_coap_resending_count = SN_COAP_RESENDING_MAX_COUNT;
00193 
00194 
00195 #endif /* ENABLE_RESENDINGS */
00196 
00197 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */
00198     /* * * * Create Linked list for storing Duplication info * * * */
00199     ns_list_init(&handle->linked_list_duplication_msgs);
00200     handle->sn_coap_duplication_buffer_size = SN_COAP_DUPLICATION_MAX_MSGS_COUNT;
00201 #endif
00202 
00203 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00204 
00205     ns_list_init(&handle->linked_list_blockwise_sent_msgs);
00206     ns_list_init(&handle->linked_list_blockwise_received_payloads);
00207     handle->sn_coap_block_data_size = SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE;
00208 
00209 #endif /* ENABLE_RESENDINGS */
00210 
00211     /* Randomize global message ID */
00212     randLIB_seed_random();
00213     message_id = randLIB_get_16bit();
00214     if (message_id == 0) {
00215         message_id = 1;
00216     }
00217 
00218     return handle;
00219 }
00220 
00221 int8_t sn_coap_protocol_handle_block2_response_internally(struct coap_s *handle, uint8_t build_response)
00222 {
00223     if (handle == NULL) {
00224         return -1;
00225     }
00226 
00227     handle->sn_coap_internal_block2_resp_handling = build_response;
00228     return 0;
00229 }
00230 
00231 int8_t sn_coap_protocol_set_block_size(struct coap_s *handle, uint16_t block_size)
00232 {
00233     (void) handle;
00234     (void) block_size;
00235 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
00236     if (handle == NULL) {
00237         return -1;
00238     }
00239     switch (block_size) {
00240         case 0:
00241         case 16:
00242         case 32:
00243         case 64:
00244         case 128:
00245         case 256:
00246         case 512:
00247         case 1024:
00248             handle->sn_coap_block_data_size = block_size;
00249             return 0;
00250         default:
00251             break;
00252     }
00253 #endif
00254     return -1;
00255 
00256 }
00257 
00258 void sn_coap_protocol_clear_sent_blockwise_messages(struct coap_s *handle)
00259 {
00260     (void) handle;
00261 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
00262     if (handle == NULL) {
00263         return;
00264     }
00265 
00266     /* Loop all stored Blockwise messages in Linked list */
00267     ns_list_foreach_safe(coap_blockwise_msg_s, removed_blocwise_msg_ptr, &handle->linked_list_blockwise_sent_msgs) {
00268         if (removed_blocwise_msg_ptr->coap_msg_ptr) {
00269             handle->sn_coap_protocol_free(removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr);
00270             removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr = 0;
00271             sn_coap_parser_release_allocated_coap_msg_mem(handle, removed_blocwise_msg_ptr->coap_msg_ptr);
00272             removed_blocwise_msg_ptr->coap_msg_ptr = 0;
00273         }
00274         sn_coap_protocol_linked_list_blockwise_msg_remove(handle, removed_blocwise_msg_ptr);
00275     }
00276 #endif
00277 }
00278 
00279 int8_t sn_coap_protocol_set_duplicate_buffer_size(struct coap_s *handle, uint8_t message_count)
00280 {
00281     (void) handle;
00282     (void) message_count;
00283 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT
00284     if (handle == NULL) {
00285         return -1;
00286     }
00287     if (message_count <= SN_COAP_MAX_ALLOWED_DUPLICATION_MESSAGE_COUNT) {
00288         handle->sn_coap_duplication_buffer_size = message_count;
00289         return 0;
00290     }
00291 #endif
00292     return -1;
00293 }
00294 
00295 int8_t sn_coap_protocol_set_retransmission_parameters(struct coap_s *handle,
00296         uint8_t resending_count, uint8_t resending_intervall)
00297 {
00298 #if ENABLE_RESENDINGS
00299     if (handle == NULL) {
00300         return -1;
00301     }
00302     if (resending_count <= SN_COAP_MAX_ALLOWED_RESENDING_COUNT &&
00303             resending_intervall <= SN_COAP_MAX_ALLOWED_RESPONSE_TIMEOUT) {
00304         handle->sn_coap_resending_count = resending_count;
00305 
00306         if (resending_intervall == 0) {
00307             handle->sn_coap_resending_intervall = 1;
00308         } else {
00309             handle->sn_coap_resending_intervall = resending_intervall;
00310         }
00311         return 0;
00312     }
00313 #endif
00314     return -1;
00315 }
00316 
00317 int8_t sn_coap_protocol_set_retransmission_buffer(struct coap_s *handle,
00318         uint8_t buffer_size_messages, uint16_t buffer_size_bytes)
00319 {
00320 #if ENABLE_RESENDINGS
00321     if (handle == NULL) {
00322         return -1;
00323     }
00324     if (buffer_size_bytes <= SN_COAP_MAX_ALLOWED_RESENDING_BUFF_SIZE_BYTES &&
00325         buffer_size_messages <= SN_COAP_MAX_ALLOWED_RESENDING_BUFF_SIZE_MSGS ) {
00326         handle->sn_coap_resending_queue_bytes = buffer_size_bytes;
00327         handle->sn_coap_resending_queue_msgs = buffer_size_messages;
00328         return 0;
00329     }
00330 
00331 #endif
00332     return -1;
00333 
00334 }
00335 
00336 void sn_coap_protocol_clear_retransmission_buffer(struct coap_s *handle)
00337 {
00338 #if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */
00339     if (handle == NULL) {
00340         return;
00341     }
00342     ns_list_foreach_safe(coap_send_msg_s, tmp, &handle->linked_list_resent_msgs) {
00343         ns_list_remove(&handle->linked_list_resent_msgs, tmp);
00344         sn_coap_protocol_release_allocated_send_msg_mem(handle, tmp);
00345         --handle->count_resent_msgs;
00346     }
00347 #endif
00348 }
00349 
00350 int8_t sn_coap_protocol_delete_retransmission(struct coap_s *handle, uint16_t msg_id)
00351 {
00352 #if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */
00353     if (handle == NULL) {
00354         return -1;
00355     }
00356     ns_list_foreach_safe(coap_send_msg_s, tmp, &handle->linked_list_resent_msgs) {
00357         if (tmp->send_msg_ptr && tmp->send_msg_ptr->packet_ptr ) {
00358             uint16_t temp_msg_id = (tmp->send_msg_ptr->packet_ptr[2] << 8);
00359             temp_msg_id += (uint16_t)tmp->send_msg_ptr->packet_ptr[3];
00360             if(temp_msg_id == msg_id){
00361                 ns_list_remove(&handle->linked_list_resent_msgs, tmp);
00362                 --handle->count_resent_msgs;
00363                 sn_coap_protocol_release_allocated_send_msg_mem(handle, tmp);
00364                 return 0;
00365             }
00366         }
00367     }
00368 #endif
00369     return -2;
00370 }
00371 
00372 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00373 int8_t prepare_blockwise_message(struct coap_s *handle, sn_coap_hdr_s *src_coap_msg_ptr)
00374 {
00375     if ((src_coap_msg_ptr->payload_len > SN_COAP_MAX_NONBLOCKWISE_PAYLOAD_SIZE) &&
00376         (src_coap_msg_ptr->payload_len > handle->sn_coap_block_data_size) &&
00377         (handle->sn_coap_block_data_size > 0)) {
00378         /* * * * Add Blockwise option to send CoAP message * * */
00379 
00380         /* Allocate memory for less used options */
00381         if (sn_coap_parser_alloc_options(handle, src_coap_msg_ptr) == NULL) {
00382             tr_error("prepare_blockwise_message - failed to allocate options!");
00383             return -2;
00384         }
00385 
00386         /* Check if Request message */
00387         if (src_coap_msg_ptr->msg_code < COAP_MSG_CODE_RESPONSE_CREATED) {
00388             /* Add Blockwise option, use Block1 because Request payload */
00389             src_coap_msg_ptr->options_list_ptr->block1 = 0x08;      /* First block  (BLOCK NUMBER, 4 MSB bits) + More to come (MORE, 1 bit) */
00390             src_coap_msg_ptr->options_list_ptr->block1 |= sn_coap_convert_block_size(handle->sn_coap_block_data_size);
00391 
00392             /* Add size1 parameter */
00393 
00394             src_coap_msg_ptr->options_list_ptr->use_size1 = true;
00395             src_coap_msg_ptr->options_list_ptr->use_size2 = false;
00396             src_coap_msg_ptr->options_list_ptr->size1 = src_coap_msg_ptr->payload_len;
00397         } else { /* Response message */
00398             /* Add Blockwise option, use Block2 because Response payload */
00399             src_coap_msg_ptr->options_list_ptr->block2 = 0x08;      /* First block  (BLOCK NUMBER, 4 MSB bits) + More to come (MORE, 1 bit) */
00400             src_coap_msg_ptr->options_list_ptr->block2 |= sn_coap_convert_block_size(handle->sn_coap_block_data_size);
00401 
00402             src_coap_msg_ptr->options_list_ptr->use_size1 = false;
00403             src_coap_msg_ptr->options_list_ptr->use_size2 = true;
00404             src_coap_msg_ptr->options_list_ptr->size2 = src_coap_msg_ptr->payload_len;
00405         }
00406     }
00407     return 0;
00408 }
00409 #endif
00410 
00411 int16_t sn_coap_protocol_build(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr,
00412                                uint8_t *dst_packet_data_ptr, sn_coap_hdr_s *src_coap_msg_ptr, void *param)
00413 {
00414     int16_t  byte_count_built     = 0;
00415 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00416     uint16_t original_payload_len = 0;
00417 #endif
00418     /* * * * Check given pointers  * * * */
00419     if ((dst_addr_ptr == NULL) || (dst_packet_data_ptr == NULL) || (src_coap_msg_ptr == NULL) || handle == NULL) {
00420         return -2;
00421     }
00422 
00423     if (dst_addr_ptr->addr_ptr == NULL) {
00424         return -2;
00425     }
00426 
00427     /* Check if built Message type is else than Acknowledgement or Reset i.e. message type is Confirmable or Non-confirmable */
00428     /* (for Acknowledgement and  Reset messages is written same Message ID than was in the Request message) */
00429     if (src_coap_msg_ptr->msg_type != COAP_MSG_TYPE_ACKNOWLEDGEMENT &&
00430             src_coap_msg_ptr->msg_type != COAP_MSG_TYPE_RESET &&
00431             src_coap_msg_ptr->msg_id == 0) {
00432         /* * * * Generate new Message ID and increase it by one  * * * */
00433         src_coap_msg_ptr->msg_id = message_id;
00434         message_id++;
00435         if (message_id == 0) {
00436             message_id = 1;
00437         }
00438     }
00439 
00440 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00441     /* If blockwising needed */
00442     if ((src_coap_msg_ptr->payload_len > SN_COAP_MAX_NONBLOCKWISE_PAYLOAD_SIZE) &&
00443         (src_coap_msg_ptr->payload_len > handle->sn_coap_block_data_size) &&
00444         (handle->sn_coap_block_data_size > 0)) {
00445         /* Store original Payload length */
00446         original_payload_len = src_coap_msg_ptr->payload_len;
00447         /* Change Payload length of send message because Payload is blockwised */
00448         src_coap_msg_ptr->payload_len = handle->sn_coap_block_data_size;
00449     }
00450 #endif
00451     /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00452     /* * * * Build Packet data from CoAP message by using CoAP Header builder  * * * */
00453     /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00454 
00455     byte_count_built = sn_coap_builder_2(dst_packet_data_ptr, src_coap_msg_ptr, handle->sn_coap_block_data_size);
00456 
00457     if (byte_count_built < 0) {
00458         tr_error("sn_coap_protocol_build - failed to build message!");
00459         return byte_count_built;
00460     }
00461 
00462 #if ENABLE_RESENDINGS /* If Message resending is not used at all, this part of code will not be compiled */
00463 
00464     /* Check if built Message type was confirmable, only these messages are resent */
00465     if (src_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) {
00466         /* Store message to Linked list for resending purposes */
00467         uint32_t resend_time = sn_coap_calculate_new_resend_time(handle->system_time, handle->sn_coap_resending_intervall, 0);
00468         if (sn_coap_protocol_linked_list_send_msg_store(handle, dst_addr_ptr, byte_count_built, dst_packet_data_ptr,
00469                 resend_time,
00470                 param) == 0) {
00471             return -4;
00472         }
00473     }
00474 
00475 #endif /* ENABLE_RESENDINGS */
00476 
00477 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT
00478     if (src_coap_msg_ptr->msg_type == COAP_MSG_TYPE_ACKNOWLEDGEMENT &&
00479             handle->sn_coap_duplication_buffer_size != 0) {
00480         coap_duplication_info_s* info = sn_coap_protocol_linked_list_duplication_info_search(handle,
00481                                                                                              dst_addr_ptr,
00482                                                                                              src_coap_msg_ptr->msg_id);
00483         /* Update package data to duplication info struct if it's not there yet */
00484         if (info && info->packet_ptr == NULL) {
00485             info->packet_ptr = handle->sn_coap_protocol_malloc(byte_count_built);
00486             if (info->packet_ptr) {
00487                 memcpy(info->packet_ptr, dst_packet_data_ptr, byte_count_built);
00488                 info->packet_len = byte_count_built;
00489             } else {
00490                 tr_error("sn_coap_protocol_build - failed to allocate duplication info!");
00491                 return -4;
00492             }
00493         }
00494     }
00495 #endif
00496 
00497 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */
00498 
00499     /* If blockwising needed */
00500     if ((original_payload_len > handle->sn_coap_block_data_size) && (handle->sn_coap_block_data_size > 0)) {
00501 
00502         /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00503         /* * * * Manage rest blockwise messages sending by storing them to Linked list * * * */
00504         /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00505 
00506         coap_blockwise_msg_s *stored_blockwise_msg_ptr;
00507 
00508         stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s));
00509         if (!stored_blockwise_msg_ptr) {
00510             //block paylaod save failed, only first block can be build. Perhaps we should return error.
00511             tr_error("sn_coap_protocol_build - blockwise message allocation failed!");
00512             return byte_count_built;
00513         }
00514         memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s));
00515 
00516         /* Fill struct */
00517         stored_blockwise_msg_ptr->timestamp = handle->system_time;
00518 
00519         stored_blockwise_msg_ptr->coap_msg_ptr = sn_coap_protocol_copy_header(handle, src_coap_msg_ptr);
00520         if( stored_blockwise_msg_ptr->coap_msg_ptr == NULL ){
00521             handle->sn_coap_protocol_free(stored_blockwise_msg_ptr);
00522             stored_blockwise_msg_ptr = 0;
00523             tr_error("sn_coap_protocol_build - block header copy failed!");
00524             return -2;
00525         }
00526 
00527         stored_blockwise_msg_ptr->coap_msg_ptr->payload_len = original_payload_len;
00528         stored_blockwise_msg_ptr->coap_msg_ptr->payload_ptr = handle->sn_coap_protocol_malloc(stored_blockwise_msg_ptr->coap_msg_ptr->payload_len);
00529 
00530         if (!stored_blockwise_msg_ptr->coap_msg_ptr->payload_ptr) {
00531             //block payload save failed, only first block can be build. Perhaps we should return error.
00532             sn_coap_parser_release_allocated_coap_msg_mem(handle, stored_blockwise_msg_ptr->coap_msg_ptr);
00533             handle->sn_coap_protocol_free(stored_blockwise_msg_ptr);
00534             stored_blockwise_msg_ptr = 0;
00535             tr_error("sn_coap_protocol_build - block payload allocation failed!");
00536             return byte_count_built;
00537         }
00538         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);
00539 
00540         stored_blockwise_msg_ptr->coap = handle;
00541         ns_list_add_to_end(&handle->linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr);
00542     }
00543 
00544     else if (src_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) {
00545         /* Add message to linked list - response can be in blocks and we need header to build response.. */
00546         coap_blockwise_msg_s *stored_blockwise_msg_ptr;
00547 
00548         stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s));
00549         if (!stored_blockwise_msg_ptr) {
00550             tr_error("sn_coap_protocol_build - blockwise (GET) allocation failed!");
00551             return byte_count_built;
00552         }
00553         memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s));
00554 
00555         /* Fill struct */
00556         stored_blockwise_msg_ptr->timestamp = handle->system_time;
00557 
00558         stored_blockwise_msg_ptr->coap_msg_ptr = sn_coap_protocol_copy_header(handle, src_coap_msg_ptr);
00559         if( stored_blockwise_msg_ptr->coap_msg_ptr == NULL ){
00560             handle->sn_coap_protocol_free(stored_blockwise_msg_ptr);
00561             stored_blockwise_msg_ptr = 0;
00562             tr_error("sn_coap_protocol_build - blockwise (GET) copy header failed!");
00563             return -2;
00564         }
00565 
00566         stored_blockwise_msg_ptr->coap = handle;
00567         ns_list_add_to_end(&handle->linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr);
00568     }
00569 
00570 #endif /* SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE */
00571 
00572     /* * * * Return built CoAP message Packet data length  * * * */
00573     return byte_count_built;
00574 }
00575 
00576 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)
00577 {
00578     sn_coap_hdr_s   *returned_dst_coap_msg_ptr = NULL;
00579     coap_version_e   coap_version              = COAP_VERSION_UNKNOWN;
00580 
00581     /* * * * Check given pointer * * * */
00582     if (src_addr_ptr == NULL || src_addr_ptr->addr_ptr == NULL ||
00583         packet_data_ptr == NULL || handle == NULL) {
00584         return NULL;
00585     }
00586 
00587     /* * * * Parse Packet data to CoAP message by using CoAP Header parser * * * */
00588     returned_dst_coap_msg_ptr = sn_coap_parser(handle, packet_data_len, packet_data_ptr, &coap_version);
00589 
00590     /* Check status of returned pointer */
00591     if (returned_dst_coap_msg_ptr == NULL) {
00592         /* Memory allocation error in parser */
00593         tr_error("sn_coap_protocol_parse - allocation fail in parser!");
00594         return NULL;
00595     }
00596     /* * * * Send bad request response if parsing fails * * * */
00597     if (returned_dst_coap_msg_ptr->coap_status == COAP_STATUS_PARSER_ERROR_IN_HEADER) {
00598         sn_coap_protocol_send_rst(handle, returned_dst_coap_msg_ptr->msg_id, src_addr_ptr, param);
00599         sn_coap_parser_release_allocated_coap_msg_mem(handle, returned_dst_coap_msg_ptr);
00600         tr_error("sn_coap_protocol_parse - COAP_STATUS_PARSER_ERROR_IN_HEADER");
00601         return NULL;
00602     }
00603 
00604     /* * * * Check validity of parsed Header values  * * * */
00605     if (sn_coap_header_validity_check(returned_dst_coap_msg_ptr, coap_version) != 0) {
00606         /* 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     */
00607         if (((returned_dst_coap_msg_ptr->msg_code >> 5) == 1) ||        // if class == 1
00608                 ((returned_dst_coap_msg_ptr->msg_code >> 5) == 6) ||    // if class == 6
00609                 ((returned_dst_coap_msg_ptr->msg_code >> 5) == 7)) {    // if class == 7
00610             tr_error("sn_coap_protocol_parse - message code not valid!");
00611             sn_coap_protocol_send_rst(handle, returned_dst_coap_msg_ptr->msg_id, src_addr_ptr, param);
00612         }
00613 
00614         /* Release memory of CoAP message */
00615         sn_coap_parser_release_allocated_coap_msg_mem(handle, returned_dst_coap_msg_ptr);
00616 
00617         /* Return NULL because Header validity check failed */
00618         return NULL;
00619     }
00620 
00621     /* Check if we need to send reset message */
00622     /*  A recipient MUST acknowledge a Confirmable message with an Acknowledgement
00623         message or, if it lacks context to process the message properly
00624         (including the case where the message is Empty, uses a code with a
00625         reserved class (1, 6 or 7), or has a message format error), MUST
00626         reject it; rejecting a Confirmable message is effected by sending a
00627         matching Reset message and otherwise ignoring it. */
00628     if (returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) {
00629         /* CoAP ping */
00630         if (returned_dst_coap_msg_ptr->msg_code == COAP_MSG_CODE_EMPTY) {
00631             sn_coap_protocol_send_rst(handle, returned_dst_coap_msg_ptr->msg_id, src_addr_ptr, param);
00632 
00633             /* Release memory of CoAP message */
00634             sn_coap_parser_release_allocated_coap_msg_mem(handle, returned_dst_coap_msg_ptr);
00635 
00636             /* Return NULL because Header validity check failed */
00637             return NULL;
00638         }
00639     }
00640 
00641 
00642 #if !SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is used, this part of code will not be compiled */
00643     /* If blockwising used in received message */
00644     if (returned_dst_coap_msg_ptr->options_list_ptr != NULL &&
00645             (returned_dst_coap_msg_ptr->options_list_ptr->block1 != COAP_OPTION_BLOCK_NONE ||
00646              returned_dst_coap_msg_ptr->options_list_ptr->block2 != COAP_OPTION_BLOCK_NONE)) {
00647         /* Set returned status to User */
00648         returned_dst_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_REJECTED;
00649         tr_error("sn_coap_protocol_parse - COAP_STATUS_PARSER_BLOCKWISE_MSG_REJECTED!");
00650         //todo: send response -> not implemented
00651         return returned_dst_coap_msg_ptr;
00652     }
00653 #endif /* !SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE */
00654 
00655 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT/* If Message duplication is used, this part of code will not be compiled */
00656 
00657     /* * * * Manage received CoAP message duplicate detection  * * * */
00658 
00659     /* If no message duplication detected */
00660     if ((returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE ||
00661             returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_NON_CONFIRMABLE) &&
00662             handle->sn_coap_duplication_buffer_size != 0) {
00663         if (sn_coap_protocol_linked_list_duplication_info_search(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id) == NULL) {
00664             /* * * No Message duplication: Store received message for detecting later duplication * * */
00665 
00666             /* Get count of stored duplication messages */
00667             uint16_t stored_duplication_msgs_count = handle->count_duplication_msgs;
00668 
00669             /* Check if there is no room to store message for duplication detection purposes */
00670             if (stored_duplication_msgs_count >= handle->sn_coap_duplication_buffer_size) {
00671                 tr_debug("sn_coap_protocol_parse - duplicate list full, dropping oldest");
00672 
00673                 /* Get oldest stored duplication message */
00674                 coap_duplication_info_s *stored_duplication_info_ptr = ns_list_get_first(&handle->linked_list_duplication_msgs);
00675 
00676                 /* Remove oldest stored duplication message for getting room for new duplication message */
00677                 sn_coap_protocol_linked_list_duplication_info_remove(handle,
00678                                                                      stored_duplication_info_ptr->address->addr_ptr,
00679                                                                      stored_duplication_info_ptr->address->port,
00680                                                                      stored_duplication_info_ptr->msg_id);
00681             }
00682 
00683             /* Store Duplication info to Linked list */
00684             sn_coap_protocol_linked_list_duplication_info_store(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id, param);
00685         } else { /* * * Message duplication detected * * */
00686             /* Set returned status to User */
00687             returned_dst_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_DUPLICATED_MSG;
00688             coap_duplication_info_s* response = sn_coap_protocol_linked_list_duplication_info_search(handle,
00689                                                                                                      src_addr_ptr,
00690                                                                                                      returned_dst_coap_msg_ptr->msg_id);
00691             /* Send ACK response */
00692             if (response) {
00693                 /* Check that response has been created */
00694                 if (response->packet_ptr) {
00695                     response->coap->sn_coap_tx_callback(response->packet_ptr,
00696                             response->packet_len, response->address, response->param);
00697                 }
00698             }
00699 
00700             return returned_dst_coap_msg_ptr;
00701         }
00702     }
00703 #endif
00704 
00705     /*** And here we check if message was block message ***/
00706     /*** If so, we call own block handling function and ***/
00707     /*** return to caller.                              ***/
00708 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
00709 
00710     if (returned_dst_coap_msg_ptr->options_list_ptr != NULL &&
00711             (returned_dst_coap_msg_ptr->options_list_ptr->block1 != COAP_OPTION_BLOCK_NONE ||
00712              returned_dst_coap_msg_ptr->options_list_ptr->block2 != COAP_OPTION_BLOCK_NONE)) {
00713         returned_dst_coap_msg_ptr = sn_coap_handle_blockwise_message(handle, src_addr_ptr, returned_dst_coap_msg_ptr, param);
00714     } else {
00715         /* Get ... */
00716         coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = NULL;
00717 
00718         ns_list_foreach(coap_blockwise_msg_s, msg, &handle->linked_list_blockwise_sent_msgs) {
00719             if (returned_dst_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) {
00720                 stored_blockwise_msg_temp_ptr = msg;
00721                 break;
00722             }
00723         }
00724         /* Remove from the list if not an notification message.
00725          * Initial notification message is needed for sending rest of the blocks (GET request).
00726         */
00727         bool remove_from_the_list = false;
00728         if (stored_blockwise_msg_temp_ptr) {
00729             if (stored_blockwise_msg_temp_ptr->coap_msg_ptr &&
00730                 stored_blockwise_msg_temp_ptr->coap_msg_ptr->options_list_ptr &&
00731                 stored_blockwise_msg_temp_ptr->coap_msg_ptr->options_list_ptr->observe != COAP_OBSERVE_NONE) {
00732                 remove_from_the_list = false;
00733             } else {
00734                 remove_from_the_list = true;
00735             }
00736         }
00737         if (remove_from_the_list) {
00738             ns_list_remove(&handle->linked_list_blockwise_sent_msgs, stored_blockwise_msg_temp_ptr);
00739             if (stored_blockwise_msg_temp_ptr->coap_msg_ptr) {
00740                 if(stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr){
00741                     handle->sn_coap_protocol_free(stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr);
00742                     stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = 0;
00743                 }
00744                 sn_coap_parser_release_allocated_coap_msg_mem(stored_blockwise_msg_temp_ptr->coap, stored_blockwise_msg_temp_ptr->coap_msg_ptr);
00745             }
00746 
00747             handle->sn_coap_protocol_free(stored_blockwise_msg_temp_ptr);
00748             stored_blockwise_msg_temp_ptr = 0;
00749         }
00750     }
00751 
00752     if (!returned_dst_coap_msg_ptr) {
00753         tr_error("sn_coap_protocol_parse - returned_dst_coap_msg_ptr null!");
00754         return NULL;
00755     }
00756 
00757 #endif
00758 
00759 
00760 #if ENABLE_RESENDINGS  /* If Message resending is not used at all, this part of code will not be compiled */
00761 
00762     /* Check if received Message type was acknowledgement */
00763     if ((returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_ACKNOWLEDGEMENT) || (returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_RESET)) {
00764         /* * * * Manage CoAP message resending by removing active resending message from Linked list * * */
00765 
00766         /* Get node count i.e. count of active resending messages */
00767         uint16_t stored_resending_msgs_count = handle->count_resent_msgs;
00768 
00769         /* Check if there is ongoing active message resendings */
00770         if (stored_resending_msgs_count > 0) {
00771             sn_nsdl_transmit_s *removed_msg_ptr = NULL;
00772 
00773             /* Check if received message was confirmation for some active resending message */
00774             removed_msg_ptr = sn_coap_protocol_linked_list_send_msg_search(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id);
00775 
00776             if (removed_msg_ptr != NULL) {
00777                 /* Remove resending message from active message resending Linked list */
00778                 sn_coap_protocol_linked_list_send_msg_remove(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id);
00779             }
00780         }
00781     }
00782 #endif /* ENABLE_RESENDINGS */
00783 
00784     /* * * * Return parsed CoAP message  * * * */
00785     return returned_dst_coap_msg_ptr;
00786 }
00787 
00788 
00789 int8_t sn_coap_protocol_exec(struct coap_s *handle, uint32_t current_time)
00790 {
00791     if( !handle ){
00792        return -1;
00793     }
00794 
00795     /* * * * Store current System time * * * */
00796     handle->system_time = current_time;
00797 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
00798     /* * * * Remove old blocwise data * * * */
00799     sn_coap_protocol_linked_list_blockwise_remove_old_data(handle);
00800 #endif
00801 
00802 
00803 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT
00804     /* * * * Remove old duplication messages * * * */
00805     sn_coap_protocol_linked_list_duplication_info_remove_old_ones(handle);
00806 #endif
00807 
00808 #if ENABLE_RESENDINGS
00809     /* Check if there is ongoing active message sendings */
00810     /* foreach_safe isn't sufficient because callback routine could cancel messages. */
00811 rescan:
00812     ns_list_foreach(coap_send_msg_s, stored_msg_ptr, &handle->linked_list_resent_msgs) {
00813         // First check that msg belongs to handle
00814         if( stored_msg_ptr->coap == handle ){
00815             /* Check if it is time to send this message */
00816             if (current_time >= stored_msg_ptr->resending_time) {
00817                 /* * * Increase Resending counter  * * */
00818                 stored_msg_ptr->resending_counter++;
00819 
00820                 /* Check if all re-sendings have been done */
00821                 if (stored_msg_ptr->resending_counter > handle->sn_coap_resending_count) {
00822                     coap_version_e coap_version = COAP_VERSION_UNKNOWN;
00823 
00824                     /* Get message ID from stored sending message */
00825                     uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8);
00826                     temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3];
00827 
00828                     /* Remove message from Linked list */
00829                     ns_list_remove(&handle->linked_list_resent_msgs, stored_msg_ptr);
00830                     --handle->count_resent_msgs;
00831 
00832                     /* If RX callback have been defined.. */
00833                     if (stored_msg_ptr->coap->sn_coap_rx_callback != 0) {
00834                         sn_coap_hdr_s *tmp_coap_hdr_ptr;
00835                         /* Parse CoAP message, set status and call RX callback */
00836                         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);
00837 
00838                         if (tmp_coap_hdr_ptr != 0) {
00839                             tmp_coap_hdr_ptr->coap_status = COAP_STATUS_BUILDER_MESSAGE_SENDING_FAILED;
00840                             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);
00841 
00842                             sn_coap_parser_release_allocated_coap_msg_mem(stored_msg_ptr->coap, tmp_coap_hdr_ptr);
00843                         }
00844                     }
00845 
00846                     /* Free memory of stored message */
00847                     sn_coap_protocol_release_allocated_send_msg_mem(handle, stored_msg_ptr);
00848                 } else {
00849                     /* Send message  */
00850                     stored_msg_ptr->coap->sn_coap_tx_callback(stored_msg_ptr->send_msg_ptr->packet_ptr,
00851                             stored_msg_ptr->send_msg_ptr->packet_len, stored_msg_ptr->send_msg_ptr->dst_addr_ptr, stored_msg_ptr->param);
00852 
00853                     /* * * Count new Resending time  * * */
00854                     stored_msg_ptr->resending_time = sn_coap_calculate_new_resend_time(current_time,
00855                                                                                        handle->sn_coap_resending_intervall,
00856                                                                                        stored_msg_ptr->resending_counter);
00857                 }
00858                 /* Callback routine could have wiped the list (eg as a response to sending failed) */
00859                 /* Be super cautious and rescan from the start */
00860                 goto rescan;
00861             }
00862         }
00863     }
00864 
00865 #endif /* ENABLE_RESENDINGS */
00866 
00867     return 0;
00868 }
00869 
00870 #if ENABLE_RESENDINGS  /* If Message resending is not used at all, this part of code will not be compiled */
00871 
00872 /**************************************************************************//**
00873  * \fn static uint8_t 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)
00874  *
00875  * \brief Stores message to Linked list for sending purposes.
00876 
00877  * \param *dst_addr_ptr is pointer to destination address where CoAP message will be sent
00878  *
00879  * \param send_packet_data_len is length of Packet data to be stored
00880  *
00881  * \param *send_packet_data_ptr is Packet data to be stored
00882  *
00883  * \param sending_time is stored sending time
00884  *
00885  * \return 0 Allocation or buffer limit reached
00886  *
00887  * \return 1 Msg stored properly
00888  *****************************************************************************/
00889 
00890 static uint8_t 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,
00891         uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param)
00892 {
00893 
00894     coap_send_msg_s *stored_msg_ptr              = NULL;
00895 
00896     /* If both queue parameters are "0" or resending count is "0", then re-sending is disabled */
00897     if (((handle->sn_coap_resending_queue_msgs == 0) && (handle->sn_coap_resending_queue_bytes == 0)) || (handle->sn_coap_resending_count == 0)) {
00898         return 1;
00899     }
00900 
00901     if (handle->sn_coap_resending_queue_msgs > 0) {
00902         if (handle->count_resent_msgs >= handle->sn_coap_resending_queue_msgs) {
00903             tr_error("sn_coap_protocol_linked_list_send_msg_store - resend queue full!");
00904             return 0;
00905         }
00906     }
00907 
00908     /* Count resending queue size, if buffer size is defined */
00909     if (handle->sn_coap_resending_queue_bytes > 0) {
00910         if ((sn_coap_count_linked_list_size(&handle->linked_list_resent_msgs) + send_packet_data_len) > handle->sn_coap_resending_queue_bytes) {
00911             tr_error("sn_coap_protocol_linked_list_send_msg_store - resend buffer size reached!");
00912             return 0;
00913         }
00914     }
00915 
00916     /* Allocating memory for stored message */
00917     stored_msg_ptr = sn_coap_protocol_allocate_mem_for_msg(handle, dst_addr_ptr, send_packet_data_len);
00918 
00919     if (stored_msg_ptr == 0) {
00920         tr_error("sn_coap_protocol_linked_list_send_msg_store - failed to allocate message!");
00921         return 0;
00922     }
00923 
00924     /* Filling of coap_send_msg_s with initialization values */
00925     stored_msg_ptr->resending_counter = 0;
00926     stored_msg_ptr->resending_time = sending_time;
00927 
00928     /* Filling of sn_nsdl_transmit_s */
00929     stored_msg_ptr->send_msg_ptr->protocol = SN_NSDL_PROTOCOL_COAP;
00930     stored_msg_ptr->send_msg_ptr->packet_len = send_packet_data_len;
00931     memcpy(stored_msg_ptr->send_msg_ptr->packet_ptr, send_packet_data_ptr, send_packet_data_len);
00932 
00933     /* Filling of sn_nsdl_addr_s */
00934     stored_msg_ptr->send_msg_ptr->dst_addr_ptr->type = dst_addr_ptr->type;
00935     stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_len = dst_addr_ptr->addr_len;
00936     memcpy(stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, dst_addr_ptr->addr_ptr, dst_addr_ptr->addr_len);
00937     stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port = dst_addr_ptr->port;
00938 
00939     stored_msg_ptr->coap = handle;
00940     stored_msg_ptr->param = param;
00941 
00942     /* Storing Resending message to Linked list */
00943     ns_list_add_to_end(&handle->linked_list_resent_msgs, stored_msg_ptr);
00944     ++handle->count_resent_msgs;
00945     return 1;
00946 }
00947 
00948 /**************************************************************************//**
00949  * \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)
00950  *
00951  * \brief Searches stored resending message from Linked list
00952  *
00953  * \param *src_addr_ptr is searching key for searched message
00954  *
00955  * \param msg_id is searching key for searched message
00956  *
00957  * \return Return value is pointer to found stored resending message in Linked
00958  *         list or NULL if message not found
00959  *****************************************************************************/
00960 
00961 static sn_nsdl_transmit_s *sn_coap_protocol_linked_list_send_msg_search(struct coap_s *handle,
00962         sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id)
00963 {
00964     /* Loop all stored resending messages Linked list */
00965     ns_list_foreach(coap_send_msg_s, stored_msg_ptr, &handle->linked_list_resent_msgs) {
00966         /* Get message ID from stored resending message */
00967         uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8);
00968         temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3];
00969 
00970         /* If message's Message ID is same than is searched */
00971         if (temp_msg_id == msg_id) {
00972             /* If message's Source address is same than is searched */
00973             if (0 == memcmp(src_addr_ptr->addr_ptr, stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, src_addr_ptr->addr_len)) {
00974                 /* If message's Source address port is same than is searched */
00975                 if (stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port == src_addr_ptr->port) {
00976                     /* * * Message found, return pointer to that stored resending message * * * */
00977                     return stored_msg_ptr->send_msg_ptr;
00978                 }
00979             }
00980         }
00981     }
00982 
00983     /* Message not found */
00984     return NULL;
00985 }
00986 /**************************************************************************//**
00987  * \fn static void sn_coap_protocol_linked_list_send_msg_remove(sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id)
00988  *
00989  * \brief Removes stored resending message from Linked list
00990  *
00991  * \param *src_addr_ptr is searching key for searched message
00992  * \param msg_id is searching key for removed message
00993  *****************************************************************************/
00994 
00995 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)
00996 {
00997     /* Loop all stored resending messages in Linked list */
00998     ns_list_foreach(coap_send_msg_s, stored_msg_ptr, &handle->linked_list_resent_msgs) {
00999         /* Get message ID from stored resending message */
01000         uint16_t temp_msg_id = (stored_msg_ptr->send_msg_ptr->packet_ptr[2] << 8);
01001         temp_msg_id += (uint16_t)stored_msg_ptr->send_msg_ptr->packet_ptr[3];
01002 
01003         /* If message's Message ID is same than is searched */
01004         if (temp_msg_id == msg_id) {
01005             /* If message's Source address is same than is searched */
01006             if (0 == memcmp(src_addr_ptr->addr_ptr, stored_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, src_addr_ptr->addr_len)) {
01007                 /* If message's Source address port is same than is searched */
01008                 if (stored_msg_ptr->send_msg_ptr->dst_addr_ptr->port == src_addr_ptr->port) {
01009                     /* * * Message found * * */
01010 
01011                     /* Remove message from Linked list */
01012                     ns_list_remove(&handle->linked_list_resent_msgs, stored_msg_ptr);
01013                     --handle->count_resent_msgs;
01014 
01015                     /* Free memory of stored message */
01016                     sn_coap_protocol_release_allocated_send_msg_mem(handle, stored_msg_ptr);
01017 
01018                     return;
01019                 }
01020             }
01021         }
01022     }
01023 }
01024 
01025 uint32_t sn_coap_calculate_new_resend_time(const uint32_t current_time, const uint8_t interval, const uint8_t counter)
01026 {
01027     uint32_t resend_time = interval << counter;
01028     uint16_t random_factor = randLIB_get_random_in_range(100, RESPONSE_RANDOM_FACTOR * 100);
01029     return current_time + ((resend_time * random_factor) / 100);
01030 }
01031 
01032 #endif /* ENABLE_RESENDINGS */
01033 
01034 void sn_coap_protocol_send_rst(struct coap_s *handle, uint16_t msg_id, sn_nsdl_addr_s *addr_ptr, void *param)
01035 {
01036     uint8_t packet_ptr[4];
01037 
01038     /* Add CoAP version and message type */
01039     packet_ptr[0] = COAP_VERSION_1;
01040     packet_ptr[0] |= COAP_MSG_TYPE_RESET;
01041 
01042     /* Add message code */
01043     packet_ptr[1] = COAP_MSG_CODE_EMPTY;
01044 
01045     /* Add message ID */
01046     packet_ptr[2] = msg_id >> 8;
01047     packet_ptr[3] = (uint8_t)msg_id;
01048 
01049     /* Send RST */
01050     handle->sn_coap_tx_callback(packet_ptr, 4, addr_ptr, param);
01051 
01052 }
01053 #if SN_COAP_DUPLICATION_MAX_MSGS_COUNT /* If Message duplication detection is not used at all, this part of code will not be compiled */
01054 
01055 /**************************************************************************//**
01056  * \fn static void sn_coap_protocol_linked_list_duplication_info_store(sn_nsdl_addr_s *addr_ptr, uint16_t msg_id)
01057  *
01058  * \brief Stores Duplication info to Linked list
01059  *
01060  * \param msg_id is Message ID to be stored
01061  * \param *addr_ptr is pointer to Address information to be stored
01062  *****************************************************************************/
01063 
01064 static void sn_coap_protocol_linked_list_duplication_info_store(struct coap_s *handle, sn_nsdl_addr_s *addr_ptr,
01065         uint16_t msg_id, void *param)
01066 {
01067     coap_duplication_info_s *stored_duplication_info_ptr = NULL;
01068 
01069     /* * * * Allocating memory for stored Duplication info * * * */
01070 
01071     /* Allocate memory for stored Duplication info's structure */
01072     stored_duplication_info_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_duplication_info_s));
01073 
01074     if (stored_duplication_info_ptr == NULL) {
01075         tr_error("sn_coap_protocol_linked_list_duplication_info_store - failed to allocate duplication info!");
01076         return;
01077     }
01078     memset(stored_duplication_info_ptr, 0, sizeof(coap_duplication_info_s));
01079 
01080     /* Allocate memory for stored Duplication info's address */
01081     stored_duplication_info_ptr->address = handle->sn_coap_protocol_malloc(sizeof(sn_nsdl_addr_s));
01082     if (stored_duplication_info_ptr->address == NULL) {
01083         tr_error("sn_coap_protocol_linked_list_duplication_info_store - failed to allocate address!");
01084         handle->sn_coap_protocol_free(stored_duplication_info_ptr);
01085         stored_duplication_info_ptr = 0;
01086         return;
01087     }
01088     memset(stored_duplication_info_ptr->address, 0, sizeof(sn_nsdl_addr_s));
01089 
01090     stored_duplication_info_ptr->address->addr_ptr = handle->sn_coap_protocol_malloc(addr_ptr->addr_len);
01091 
01092     if (stored_duplication_info_ptr->address->addr_ptr == NULL) {
01093         tr_error("sn_coap_protocol_linked_list_duplication_info_store - failed to allocate address pointer!");
01094         handle->sn_coap_protocol_free(stored_duplication_info_ptr->address);
01095         stored_duplication_info_ptr->address = 0;
01096         handle->sn_coap_protocol_free(stored_duplication_info_ptr);
01097         stored_duplication_info_ptr = 0;
01098         return;
01099     }
01100 
01101     /* * * * Filling fields of stored Duplication info * * * */
01102     stored_duplication_info_ptr->timestamp = handle->system_time;
01103     stored_duplication_info_ptr->address->addr_len = addr_ptr->addr_len;
01104     memcpy(stored_duplication_info_ptr->address->addr_ptr, addr_ptr->addr_ptr, addr_ptr->addr_len);
01105     stored_duplication_info_ptr->address->port = addr_ptr->port;
01106     stored_duplication_info_ptr->msg_id = msg_id;
01107 
01108     stored_duplication_info_ptr->coap = handle;
01109 
01110     stored_duplication_info_ptr->param = param;
01111     /* * * * Storing Duplication info to Linked list * * * */
01112 
01113     ns_list_add_to_end(&handle->linked_list_duplication_msgs, stored_duplication_info_ptr);
01114     ++handle->count_duplication_msgs;
01115 }
01116 
01117 /**************************************************************************//**
01118  * \fn static int8_t sn_coap_protocol_linked_list_duplication_info_search(sn_nsdl_addr_s *addr_ptr, uint16_t msg_id)
01119  *
01120  * \brief Searches stored message from Linked list (Address and Message ID as key)
01121  *
01122  * \param *addr_ptr is pointer to Address key to be searched
01123  * \param msg_id is Message ID key to be searched
01124  *
01125  * \return Return value is 0 when message found and -1 if not found
01126  *****************************************************************************/
01127 
01128 static coap_duplication_info_s* sn_coap_protocol_linked_list_duplication_info_search(struct coap_s *handle,
01129         sn_nsdl_addr_s *addr_ptr, uint16_t msg_id)
01130 {
01131     /* Loop all nodes in Linked list for searching Message ID */
01132     ns_list_foreach(coap_duplication_info_s, stored_duplication_info_ptr, &handle->linked_list_duplication_msgs) {
01133         /* If message's Message ID is same than is searched */
01134         if (stored_duplication_info_ptr->msg_id == msg_id) {
01135             /* If message's Source address is same than is searched */
01136             if (0 == memcmp(addr_ptr->addr_ptr, stored_duplication_info_ptr->address->addr_ptr, addr_ptr->addr_len)) {
01137                 /* If message's Source address port is same than is searched */
01138                 if (stored_duplication_info_ptr->address->port == addr_ptr->port) {
01139                     /* * * Correct Duplication info found * * * */
01140                     return stored_duplication_info_ptr;
01141                 }
01142             }
01143         }
01144     }
01145     return NULL;
01146 }
01147 
01148 /**************************************************************************//**
01149  * \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)
01150  *
01151  * \brief Removes stored Duplication info from Linked list
01152  *
01153  * \param *addr_ptr is pointer to Address key to be removed
01154  *
01155  * \param port is Port key to be removed
01156  *
01157  * \param msg_id is Message ID key to be removed
01158  *****************************************************************************/
01159 
01160 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)
01161 {
01162     /* Loop all stored duplication messages in Linked list */
01163     ns_list_foreach(coap_duplication_info_s, removed_duplication_info_ptr, &handle->linked_list_duplication_msgs) {
01164         /* If message's Address is same than is searched */
01165         if (handle == removed_duplication_info_ptr->coap && 0 == memcmp(addr_ptr,
01166                                                                         removed_duplication_info_ptr->address->addr_ptr,
01167                                                                         removed_duplication_info_ptr->address->addr_len)) {
01168             /* If message's Address prt is same than is searched */
01169             if (removed_duplication_info_ptr->address->port == port) {
01170                 /* If Message ID is same than is searched */
01171                 if (removed_duplication_info_ptr->msg_id == msg_id) {
01172                     /* * * * Correct Duplication info found, remove it from Linked list * * * */
01173                     ns_list_remove(&handle->linked_list_duplication_msgs, removed_duplication_info_ptr);
01174                     --handle->count_duplication_msgs;
01175 
01176                     /* Free memory of stored Duplication info */
01177                     handle->sn_coap_protocol_free(removed_duplication_info_ptr->address->addr_ptr);
01178                     removed_duplication_info_ptr->address->addr_ptr = 0;
01179                     handle->sn_coap_protocol_free(removed_duplication_info_ptr->address);
01180                     removed_duplication_info_ptr->address = 0;
01181                     handle->sn_coap_protocol_free(removed_duplication_info_ptr->packet_ptr);
01182                     removed_duplication_info_ptr->packet_ptr = 0;
01183                     handle->sn_coap_protocol_free(removed_duplication_info_ptr);
01184                     removed_duplication_info_ptr = 0;
01185                     return;
01186                 }
01187             }
01188         }
01189     }
01190 }
01191 
01192 /**************************************************************************//**
01193  * \fn static void sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle)
01194  *
01195  * \brief Removes old stored Duplication detection infos from Linked list
01196  *****************************************************************************/
01197 
01198 static void sn_coap_protocol_linked_list_duplication_info_remove_old_ones(struct coap_s *handle)
01199 {
01200     /* Loop all stored duplication messages in Linked list */
01201     ns_list_foreach_safe(coap_duplication_info_s, removed_duplication_info_ptr, &handle->linked_list_duplication_msgs) {
01202         if ((handle->system_time - removed_duplication_info_ptr->timestamp)  > SN_COAP_DUPLICATION_MAX_TIME_MSGS_STORED) {
01203             /* * * * Old Duplication info found, remove it from Linked list * * * */
01204             ns_list_remove(&handle->linked_list_duplication_msgs, removed_duplication_info_ptr);
01205             --handle->count_duplication_msgs;
01206 
01207             /* Free memory of stored Duplication info */
01208             handle->sn_coap_protocol_free(removed_duplication_info_ptr->address->addr_ptr);
01209             removed_duplication_info_ptr->address->addr_ptr = 0;
01210             handle->sn_coap_protocol_free(removed_duplication_info_ptr->address);
01211             removed_duplication_info_ptr->address = 0;
01212             handle->sn_coap_protocol_free(removed_duplication_info_ptr->packet_ptr);
01213             removed_duplication_info_ptr->packet_ptr = 0;
01214             handle->sn_coap_protocol_free(removed_duplication_info_ptr);
01215             removed_duplication_info_ptr = 0;
01216         }
01217     }
01218 }
01219 
01220 #endif /* SN_COAP_DUPLICATION_MAX_MSGS_COUNT */
01221 
01222 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
01223 /**************************************************************************//**
01224  * \fn static void sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr)
01225  *
01226  * \brief Removes stored blockwise message from Linked list
01227  *
01228  * \param removed_msg_ptr is message to be removed
01229  *****************************************************************************/
01230 
01231 static void sn_coap_protocol_linked_list_blockwise_msg_remove(struct coap_s *handle, coap_blockwise_msg_s *removed_msg_ptr)
01232 {
01233     if( removed_msg_ptr->coap == handle ){
01234         ns_list_remove(&handle->linked_list_blockwise_sent_msgs, removed_msg_ptr);
01235 
01236         if( removed_msg_ptr->coap_msg_ptr ){
01237             if (removed_msg_ptr->coap_msg_ptr->payload_ptr) {
01238                 handle->sn_coap_protocol_free(removed_msg_ptr->coap_msg_ptr->payload_ptr);
01239                 removed_msg_ptr->coap_msg_ptr->payload_ptr = 0;
01240             }
01241 
01242             sn_coap_parser_release_allocated_coap_msg_mem(handle, removed_msg_ptr->coap_msg_ptr);
01243         }
01244 
01245         handle->sn_coap_protocol_free(removed_msg_ptr);
01246         removed_msg_ptr = 0;
01247     }
01248 }
01249 
01250 /**************************************************************************//**
01251  * \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)
01252  *
01253  * \brief Stores blockwise payload to Linked list
01254  *
01255  * \param *addr_ptr is pointer to Address information to be stored
01256  * \param stored_payload_len is length of stored Payload
01257  * \param *stored_payload_ptr is pointer to stored Payload
01258  *****************************************************************************/
01259 
01260 static void sn_coap_protocol_linked_list_blockwise_payload_store(struct coap_s *handle, sn_nsdl_addr_s *addr_ptr,
01261         uint16_t stored_payload_len,
01262         uint8_t *stored_payload_ptr,
01263         uint32_t block_number)
01264 {
01265     if (!addr_ptr || !stored_payload_len || !stored_payload_ptr) {
01266         return;
01267     }
01268 
01269     // Do not add duplicates to list, this could happen if server needs to retransmit block message again
01270     ns_list_foreach(coap_blockwise_payload_s, payload_info_ptr, &handle->linked_list_blockwise_received_payloads) {
01271         if (0 == memcmp(addr_ptr->addr_ptr, payload_info_ptr->addr_ptr, addr_ptr->addr_len)) {
01272             if (payload_info_ptr->port == addr_ptr->port && payload_info_ptr->block_number == block_number) {
01273                 return;
01274             }
01275         }
01276     }
01277 
01278     coap_blockwise_payload_s *stored_blockwise_payload_ptr = NULL;
01279 
01280     /* * * * Allocating memory for stored Payload  * * * */
01281 
01282     /* Allocate memory for stored Payload's structure */
01283     stored_blockwise_payload_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_payload_s));
01284 
01285     if (stored_blockwise_payload_ptr == NULL) {
01286         tr_error("sn_coap_protocol_linked_list_blockwise_payload_store - failed to allocate blockwise!");
01287         return;
01288     }
01289 
01290 
01291     /* Allocate memory for stored Payload's data */
01292     stored_blockwise_payload_ptr->payload_ptr = handle->sn_coap_protocol_malloc(stored_payload_len);
01293 
01294     if (stored_blockwise_payload_ptr->payload_ptr == NULL) {
01295         tr_error("sn_coap_protocol_linked_list_blockwise_payload_store - failed to allocate payload!");
01296         handle->sn_coap_protocol_free(stored_blockwise_payload_ptr);
01297         stored_blockwise_payload_ptr = 0;
01298         return;
01299     }
01300 
01301     /* Allocate memory for stored Payload's address */
01302     stored_blockwise_payload_ptr->addr_ptr = handle->sn_coap_protocol_malloc(addr_ptr->addr_len);
01303 
01304     if (stored_blockwise_payload_ptr->addr_ptr == NULL) {
01305         tr_error("sn_coap_protocol_linked_list_blockwise_payload_store - failed to allocate address pointer!");
01306         handle->sn_coap_protocol_free(stored_blockwise_payload_ptr->payload_ptr);
01307         stored_blockwise_payload_ptr->payload_ptr = 0;
01308         handle->sn_coap_protocol_free(stored_blockwise_payload_ptr);
01309         stored_blockwise_payload_ptr = 0;
01310 
01311         return;
01312     }
01313 
01314     /* * * * Filling fields of stored Payload  * * * */
01315 
01316     stored_blockwise_payload_ptr->timestamp = handle->system_time;
01317 
01318     memcpy(stored_blockwise_payload_ptr->addr_ptr, addr_ptr->addr_ptr, addr_ptr->addr_len);
01319     stored_blockwise_payload_ptr->port = addr_ptr->port;
01320     memcpy(stored_blockwise_payload_ptr->payload_ptr, stored_payload_ptr, stored_payload_len);
01321     stored_blockwise_payload_ptr->payload_len = stored_payload_len;
01322 
01323     stored_blockwise_payload_ptr->coap = handle;
01324 
01325     stored_blockwise_payload_ptr->block_number = block_number;
01326 
01327     /* * * * Storing Payload to Linked list  * * * */
01328 
01329     ns_list_add_to_end(&handle->linked_list_blockwise_received_payloads, stored_blockwise_payload_ptr);
01330 }
01331 
01332 /**************************************************************************//**
01333  * \fn static uint8_t *sn_coap_protocol_linked_list_blockwise_payload_search(sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length)
01334  *
01335  * \brief Searches stored blockwise payload from Linked list (Address as key)
01336  *
01337  * \param *addr_ptr is pointer to Address key to be searched
01338  * \param *payload_length is pointer to returned Payload length
01339  *
01340  * \return Return value is pointer to found stored blockwise payload in Linked
01341  *         list or NULL if payload not found
01342  *****************************************************************************/
01343 
01344 static uint8_t *sn_coap_protocol_linked_list_blockwise_payload_search(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t *payload_length)
01345 {
01346     /* Loop all stored blockwise payloads in Linked list */
01347     ns_list_foreach(coap_blockwise_payload_s, stored_payload_info_ptr, &handle->linked_list_blockwise_received_payloads) {
01348         /* If payload's Source address is same than is searched */
01349         if (0 == memcmp(src_addr_ptr->addr_ptr, stored_payload_info_ptr->addr_ptr, src_addr_ptr->addr_len)) {
01350             /* If payload's Source address port is same than is searched */
01351             if (stored_payload_info_ptr->port == src_addr_ptr->port) {
01352                 /* * * Correct Payload found * * * */
01353                 *payload_length = stored_payload_info_ptr->payload_len;
01354 
01355                 return stored_payload_info_ptr->payload_ptr;
01356             }
01357         }
01358     }
01359 
01360     return NULL;
01361 }
01362 
01363 static bool sn_coap_protocol_linked_list_blockwise_payload_compare_block_number(struct coap_s *handle,
01364                                                                                    sn_nsdl_addr_s *src_addr_ptr,
01365                                                                                    uint32_t block_number)
01366 {
01367     /* Loop all stored blockwise payloads in Linked list */
01368     ns_list_foreach(coap_blockwise_payload_s, stored_payload_info_ptr, &handle->linked_list_blockwise_received_payloads) {
01369         /* If payload's Source address is same than is searched */
01370         if (0 == memcmp(src_addr_ptr->addr_ptr, stored_payload_info_ptr->addr_ptr, src_addr_ptr->addr_len)) {
01371             /* If payload's Source address port is same than is searched */
01372             if (stored_payload_info_ptr->port == src_addr_ptr->port) {
01373                 // Check that incoming block number matches to last received one
01374                 if (block_number - 1 == stored_payload_info_ptr->block_number) {
01375                     return true;
01376                 }
01377             }
01378         }
01379     }
01380     return false;
01381 }
01382 
01383 /**************************************************************************//**
01384  * \fn static void sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle)
01385  *
01386  * \brief Removes current stored blockwise paylod from Linked list
01387  *****************************************************************************/
01388 
01389 static void sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(struct coap_s *handle)
01390 {
01391     coap_blockwise_payload_s *removed_payload_ptr;
01392 
01393     /* Remove oldest node in Linked list*/
01394     removed_payload_ptr = ns_list_get_first(&handle->linked_list_blockwise_received_payloads);
01395 
01396     if (removed_payload_ptr != NULL) {
01397         sn_coap_protocol_linked_list_blockwise_payload_remove(handle, removed_payload_ptr);
01398     }
01399 }
01400 
01401 /**************************************************************************//**
01402  * \fn static void sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle,
01403  *                                                      coap_blockwise_msg_s *removed_msg_ptr)
01404  *
01405  * \brief Removes stored blockwise payload from Linked list
01406  *
01407  * \param removed_payload_ptr is payload to be removed
01408  *****************************************************************************/
01409 
01410 static void sn_coap_protocol_linked_list_blockwise_payload_remove(struct coap_s *handle,
01411                                                                   coap_blockwise_payload_s *removed_payload_ptr)
01412 {
01413     ns_list_remove(&handle->linked_list_blockwise_received_payloads, removed_payload_ptr);
01414     /* Free memory of stored payload */
01415     if (removed_payload_ptr->addr_ptr != NULL) {
01416         handle->sn_coap_protocol_free(removed_payload_ptr->addr_ptr);
01417         removed_payload_ptr->addr_ptr = 0;
01418     }
01419 
01420     if (removed_payload_ptr->payload_ptr != NULL) {
01421         handle->sn_coap_protocol_free(removed_payload_ptr->payload_ptr);
01422         removed_payload_ptr->payload_ptr = 0;
01423     }
01424 
01425     handle->sn_coap_protocol_free(removed_payload_ptr);
01426     removed_payload_ptr = 0;
01427 }
01428 
01429 /**************************************************************************//**
01430  * \fn static uint32_t sn_coap_protocol_linked_list_blockwise_payloads_get_len(sn_nsdl_addr_s *src_addr_ptr)
01431  *
01432  * \brief Counts length of Payloads in Linked list (Address as key)
01433  *
01434  * \param *addr_ptr is pointer to Address key
01435  *
01436  * \return Return value is length of Payloads as bytes
01437  *****************************************************************************/
01438 
01439 static uint32_t sn_coap_protocol_linked_list_blockwise_payloads_get_len(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr)
01440 {
01441     uint32_t ret_whole_payload_len = 0;
01442     /* Loop all stored blockwise payloads in Linked list */
01443     ns_list_foreach(coap_blockwise_payload_s, searched_payload_info_ptr, &handle->linked_list_blockwise_received_payloads) {
01444         /* If payload's Source address is same than is searched */
01445         if (0 == memcmp(src_addr_ptr->addr_ptr, searched_payload_info_ptr->addr_ptr, src_addr_ptr->addr_len)) {
01446             /* If payload's Source address port is same than is searched */
01447             if (searched_payload_info_ptr->port == src_addr_ptr->port) {
01448                 /* * * Correct Payload found * * * */
01449                 ret_whole_payload_len += searched_payload_info_ptr->payload_len;
01450             }
01451         }
01452     }
01453 
01454     return ret_whole_payload_len;
01455 }
01456 
01457 /**************************************************************************//**
01458  * \fn static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle)
01459  *
01460  * \brief Removes old stored Blockwise messages and payloads from Linked list
01461  *****************************************************************************/
01462 
01463 static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s *handle)
01464 {
01465     /* Loop all stored Blockwise messages in Linked list */
01466     ns_list_foreach_safe(coap_blockwise_msg_s, removed_blocwise_msg_ptr, &handle->linked_list_blockwise_sent_msgs) {
01467         if ((handle->system_time - removed_blocwise_msg_ptr->timestamp)  > SN_COAP_BLOCKWISE_MAX_TIME_DATA_STORED) {
01468             //TODO: Check do we need to check handle == removed_blocwise_msg_ptr->coap here?
01469 
01470             /* * * * Old Blockise message found, remove it from Linked list * * * */
01471             if( removed_blocwise_msg_ptr->coap_msg_ptr ){
01472                 if(removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr){
01473                     handle->sn_coap_protocol_free(removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr);
01474                     removed_blocwise_msg_ptr->coap_msg_ptr->payload_ptr = 0;
01475                 }
01476                 sn_coap_parser_release_allocated_coap_msg_mem(handle, removed_blocwise_msg_ptr->coap_msg_ptr);
01477                 removed_blocwise_msg_ptr->coap_msg_ptr = 0;
01478             }
01479             sn_coap_protocol_linked_list_blockwise_msg_remove(handle, removed_blocwise_msg_ptr);
01480         }
01481     }
01482 
01483     /* Loop all stored Blockwise payloads in Linked list */
01484     ns_list_foreach_safe(coap_blockwise_payload_s, removed_blocwise_payload_ptr, &handle->linked_list_blockwise_received_payloads) {
01485         if ((handle->system_time - removed_blocwise_payload_ptr->timestamp)  > SN_COAP_BLOCKWISE_MAX_TIME_DATA_STORED) {
01486             /* * * * Old Blockise payload found, remove it from Linked list * * * */
01487             sn_coap_protocol_linked_list_blockwise_payload_remove(handle, removed_blocwise_payload_ptr);
01488         }
01489     }
01490 }
01491 
01492 #endif /* SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE */
01493 
01494 
01495 #if ENABLE_RESENDINGS  /* If Message resending is not used at all, this part of code will not be compiled */
01496 /***************************************************************************//**
01497  * \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)
01498  *
01499  * \brief Allocates memory for given message (send or blockwise message)
01500  *
01501  * \param *dst_addr_ptr is pointer to destination address where message will be sent
01502  * \param packet_data_len is length of allocated Packet data
01503  * \param uri_path_len is length of messages path url
01504  *
01505  * \return pointer to allocated struct
01506  *****************************************************************************/
01507 
01508 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)
01509 {
01510 
01511     coap_send_msg_s *msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_send_msg_s));
01512 
01513     if (msg_ptr == NULL) {
01514         return NULL;
01515     }
01516 
01517     //Locall structure for 1 malloc for send msg
01518     struct
01519     {
01520         sn_nsdl_transmit_s transmit;
01521         sn_nsdl_addr_s addr;
01522         uint8_t trail_data[];
01523     } *m;
01524     int trail_size = dst_addr_ptr->addr_len + packet_data_len;
01525 
01526     m = handle->sn_coap_protocol_malloc(sizeof *m + trail_size);
01527     if (!m) {
01528         handle->sn_coap_protocol_free(msg_ptr);
01529         return NULL;
01530     }
01531     //Init data
01532     memset(m, 0, sizeof(*m) + trail_size);
01533     memset(msg_ptr, 0, sizeof(coap_send_msg_s));
01534 
01535     msg_ptr->send_msg_ptr = &m->transmit;
01536     msg_ptr->send_msg_ptr->dst_addr_ptr = &m->addr;
01537 
01538     msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = m->trail_data;
01539     if (packet_data_len) {
01540         msg_ptr->send_msg_ptr->packet_ptr = m->trail_data + dst_addr_ptr->addr_len;
01541     }
01542 
01543     return msg_ptr;
01544 }
01545 
01546 
01547 /**************************************************************************//**
01548  * \fn static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr)
01549  *
01550  * \brief Releases memory of given Sending message (coap_send_msg_s)
01551  *
01552  * \param *freed_send_msg_ptr is pointer to released Sending message
01553  *****************************************************************************/
01554 
01555 static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr)
01556 {
01557     if (freed_send_msg_ptr != NULL) {
01558         handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr);
01559         freed_send_msg_ptr->send_msg_ptr = NULL;
01560         handle->sn_coap_protocol_free(freed_send_msg_ptr);
01561         freed_send_msg_ptr = NULL;
01562     }
01563 }
01564 
01565 /**************************************************************************//**
01566  * \fn static uint16_t sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr)
01567  *
01568  * \brief Counts total message size of all messages in linked list
01569  *
01570  * \param const coap_send_msg_list_t *linked_list_ptr pointer to linked list
01571  *****************************************************************************/
01572 static uint16_t sn_coap_count_linked_list_size(const coap_send_msg_list_t *linked_list_ptr)
01573 {
01574     uint16_t total_size = 0;
01575 
01576     ns_list_foreach(coap_send_msg_s, stored_msg_ptr, linked_list_ptr) {
01577         if (stored_msg_ptr->send_msg_ptr) {
01578             total_size += stored_msg_ptr->send_msg_ptr->packet_len;
01579         }
01580     }
01581 
01582     return total_size;
01583 }
01584 
01585 #endif
01586 
01587 #if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE
01588 void sn_coap_protocol_remove_sent_blockwise_message(struct coap_s *handle, uint16_t message_id)
01589 {
01590     if (!handle) {
01591         return;
01592     }
01593 
01594     ns_list_foreach_safe(coap_blockwise_msg_s, tmp, &handle->linked_list_blockwise_sent_msgs) {
01595         if (tmp->coap == handle && tmp->coap_msg_ptr && tmp->coap_msg_ptr->msg_id == message_id) {
01596             handle->sn_coap_protocol_free(tmp->coap_msg_ptr->payload_ptr);
01597             sn_coap_parser_release_allocated_coap_msg_mem(tmp->coap, tmp->coap_msg_ptr);
01598             ns_list_remove(&handle->linked_list_blockwise_sent_msgs, tmp);
01599             handle->sn_coap_protocol_free(tmp);
01600             break;
01601         }
01602     }
01603 }
01604 
01605 void sn_coap_protocol_block_remove(struct coap_s *handle, sn_nsdl_addr_s *source_address, uint16_t payload_length, void *payload)
01606 {
01607     if (!handle || !source_address || !payload) {
01608         return;
01609     }
01610 
01611     /* Loop all stored blockwise payloads in Linked list */
01612     ns_list_foreach(coap_blockwise_payload_s, stored_payload_info_ptr, &handle->linked_list_blockwise_received_payloads) {
01613         /* If payload's Source address is not the same than is searched */
01614         if (memcmp(source_address->addr_ptr, stored_payload_info_ptr->addr_ptr, source_address->addr_len)) {
01615             continue;
01616         }
01617 
01618         /* If payload's Source address port is not the same than is searched */
01619         if (stored_payload_info_ptr->port != source_address->port) {
01620             continue;
01621         }
01622 
01623         /* Check the payload */
01624         if(payload_length != stored_payload_info_ptr->payload_len){
01625             continue;
01626         }
01627 
01628         if(!memcmp(stored_payload_info_ptr->payload_ptr, payload, stored_payload_info_ptr->payload_len))
01629         {
01630             /* Everything matches, remove and return. */
01631             sn_coap_protocol_linked_list_blockwise_payload_remove(handle, stored_payload_info_ptr);
01632             return;
01633         }
01634     }
01635 }
01636 /**************************************************************************//**
01637  * \fn static int8_t sn_coap_handle_blockwise_message(void)
01638  *
01639  * \brief Handles all received blockwise messages
01640  *
01641  * \param *src_addr_ptr pointer to source address information struct
01642  * \param *received_coap_msg_ptr pointer to parsed CoAP message structure
01643  *****************************************************************************/
01644 
01645 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)
01646 {
01647     sn_coap_hdr_s *src_coap_blockwise_ack_msg_ptr = NULL;
01648     uint16_t dst_packed_data_needed_mem = 0;
01649     uint8_t *dst_ack_packet_data_ptr = NULL;
01650     uint8_t block_temp = 0;
01651 
01652     uint16_t original_payload_len = 0;
01653     uint8_t *original_payload_ptr = NULL;
01654 
01655     /* Block1 Option in a request (e.g., PUT or POST) */
01656     // Blocked request sending, received ACK, sending next block..
01657     if (received_coap_msg_ptr->options_list_ptr->block1 != COAP_OPTION_BLOCK_NONE) {
01658         if (received_coap_msg_ptr->msg_code > COAP_MSG_CODE_REQUEST_DELETE) {
01659             if (received_coap_msg_ptr->options_list_ptr->block1 & 0x08) {
01660                 coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = NULL;
01661 
01662                 /* Get  */
01663                 ns_list_foreach(coap_blockwise_msg_s, msg, &handle->linked_list_blockwise_sent_msgs) {
01664                     if (msg->coap_msg_ptr && received_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) {
01665                         stored_blockwise_msg_temp_ptr = msg;
01666                         break;
01667                     }
01668                 }
01669 
01670                 if (stored_blockwise_msg_temp_ptr) {
01671                     /* Build response message */
01672 
01673                     uint16_t block_size;
01674                     uint32_t block_number;
01675 
01676                     /* Get block option parameters from received message */
01677                     block_number = received_coap_msg_ptr->options_list_ptr->block1 >> 4;
01678                     block_temp = received_coap_msg_ptr->options_list_ptr->block1 & 0x07;
01679                     block_size = 1u << (block_temp + 4);
01680 
01681                     /* Build next block message */
01682                     src_coap_blockwise_ack_msg_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr;
01683 
01684                     if (src_coap_blockwise_ack_msg_ptr->options_list_ptr) {
01685                         src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 = COAP_OPTION_BLOCK_NONE;
01686                         src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2 = COAP_OPTION_BLOCK_NONE;
01687                     } else {
01688                         if (!sn_coap_parser_alloc_options(handle, src_coap_blockwise_ack_msg_ptr)) {
01689                             tr_error("sn_coap_handle_blockwise_message - (send block1) failed to allocate ack message!");
01690                             sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01691                             return 0;
01692                         }
01693                     }
01694 
01695                     block_number++;
01696                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 = (block_number << 4) | block_temp;
01697 
01698                     original_payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len;
01699                     original_payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr;
01700 
01701                     if ((block_size * (block_number + 1)) > stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) {
01702                         src_coap_blockwise_ack_msg_ptr->payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len - (block_size * (block_number));
01703                         src_coap_blockwise_ack_msg_ptr->payload_ptr = src_coap_blockwise_ack_msg_ptr->payload_ptr + (block_size * block_number);
01704                     }
01705 
01706                     /* Not last block */
01707                     else {
01708                         /* set more - bit */
01709                         src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 |= 0x08;
01710                         src_coap_blockwise_ack_msg_ptr->payload_len = block_size;
01711                         src_coap_blockwise_ack_msg_ptr->payload_ptr = src_coap_blockwise_ack_msg_ptr->payload_ptr + (block_size * block_number);
01712                     }
01713                     /* Build and send block message */
01714                     dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size_2(src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
01715 
01716                     dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem);
01717                     if (!dst_ack_packet_data_ptr) {
01718                         tr_error("sn_coap_handle_blockwise_message - (send block1) failed to allocate ack message!");
01719                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
01720                         src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
01721                         handle->sn_coap_protocol_free(original_payload_ptr);
01722                         original_payload_ptr = 0;
01723                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
01724                         src_coap_blockwise_ack_msg_ptr = 0;
01725                         stored_blockwise_msg_temp_ptr->coap_msg_ptr = NULL;
01726                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01727                         return NULL;
01728                     }
01729                     src_coap_blockwise_ack_msg_ptr->msg_id = message_id++;
01730                     if (message_id == 0) {
01731                         message_id = 1;
01732                     }
01733 
01734                     sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
01735                     handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param);
01736 
01737                     handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
01738                     dst_ack_packet_data_ptr = 0;
01739 
01740                     stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len = original_payload_len;
01741                     stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = original_payload_ptr;
01742 
01743                     received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_ACK;
01744                 }
01745             } else {
01746                 // XXX what was this trying to free?
01747                 received_coap_msg_ptr->coap_status = COAP_STATUS_OK;
01748 
01749             }
01750         }
01751 
01752         // Blocked request receiving
01753         else {
01754             if (received_coap_msg_ptr->payload_len > handle->sn_coap_block_data_size) {
01755                 received_coap_msg_ptr->payload_len = handle->sn_coap_block_data_size;
01756             }
01757 
01758             // Check that incoming block number is in order.
01759             uint32_t block_number = received_coap_msg_ptr->options_list_ptr->block1 >> 4;
01760             bool blocks_in_order = true;
01761             if (block_number > 0 &&
01762                 !sn_coap_protocol_linked_list_blockwise_payload_compare_block_number(handle,
01763                                                                                      src_addr_ptr,
01764                                                                                      block_number)) {
01765                 blocks_in_order = false;
01766             }
01767 
01768             sn_coap_protocol_linked_list_blockwise_payload_store(handle,
01769                                                                  src_addr_ptr,
01770                                                                  received_coap_msg_ptr->payload_len,
01771                                                                  received_coap_msg_ptr->payload_ptr,
01772                                                                  block_number);
01773 
01774             /* If not last block (more value is set) */
01775             /* 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. */
01776             if (received_coap_msg_ptr->options_list_ptr->block1 & 0x08) {
01777                 src_coap_blockwise_ack_msg_ptr = sn_coap_parser_alloc_message(handle);
01778                 if (src_coap_blockwise_ack_msg_ptr == NULL) {
01779                     tr_error("sn_coap_handle_blockwise_message - (recv block1) failed to allocate ack message!");
01780                     sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01781                     return NULL;
01782                 }
01783 
01784                 if (sn_coap_parser_alloc_options(handle, src_coap_blockwise_ack_msg_ptr) == NULL) {
01785                    tr_error("sn_coap_handle_blockwise_message - (recv block1) failed to allocate options!");
01786                     handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
01787                     src_coap_blockwise_ack_msg_ptr = 0;
01788                     sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01789                     return NULL;
01790                 }
01791 
01792                 if (!blocks_in_order) {
01793                     tr_error("sn_coap_handle_blockwise_message - (recv block1) COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_INCOMPLETE!");
01794                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_INCOMPLETE;
01795                 } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) {
01796                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CONTENT;
01797                 } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_POST) {
01798                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CONTINUE;
01799                 } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT) {
01800                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CONTINUE;
01801                 } else if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_REQUEST_DELETE) {
01802                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_DELETED;
01803                 }
01804 
01805                 // Response with COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE if the payload size is more than we can handle
01806                 if (received_coap_msg_ptr->options_list_ptr->size1 > SN_COAP_MAX_INCOMING_BLOCK_MESSAGE_SIZE) {
01807                     // Include maximum size that stack can handle into response
01808                     tr_error("sn_coap_handle_blockwise_message - (recv block1) COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE!");
01809                     src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE;
01810                 }
01811                 else {
01812                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 = received_coap_msg_ptr->options_list_ptr->block1;
01813                     src_coap_blockwise_ack_msg_ptr->msg_type = COAP_MSG_TYPE_ACKNOWLEDGEMENT;
01814 
01815                     /* Check block size */
01816                     block_temp = (src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 & 0x07);
01817                     uint16_t block_size = 1u << (block_temp + 4);
01818                     if (block_size >  handle->sn_coap_block_data_size) {
01819                          // Include maximum size that stack can handle into response
01820                          tr_error("sn_coap_handle_blockwise_message - (recv block1) COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE!");
01821                          src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE;
01822                          src_coap_blockwise_ack_msg_ptr->options_list_ptr->size1 = handle->sn_coap_block_data_size;
01823                          sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(handle);
01824                     }
01825 
01826                     if (block_temp > sn_coap_convert_block_size(handle->sn_coap_block_data_size)) {
01827                         src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 &= 0xFFFFF8;
01828                         src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 |= sn_coap_convert_block_size(handle->sn_coap_block_data_size);
01829                     }
01830                 }
01831 
01832                 src_coap_blockwise_ack_msg_ptr->msg_id = received_coap_msg_ptr->msg_id;
01833 
01834                 // Copy token to response
01835                 src_coap_blockwise_ack_msg_ptr->token_ptr = handle->sn_coap_protocol_malloc(received_coap_msg_ptr->token_len);
01836                 if (src_coap_blockwise_ack_msg_ptr->token_ptr) {
01837                     memcpy(src_coap_blockwise_ack_msg_ptr->token_ptr, received_coap_msg_ptr->token_ptr, received_coap_msg_ptr->token_len);
01838                     src_coap_blockwise_ack_msg_ptr->token_len = received_coap_msg_ptr->token_len;
01839                 }
01840 
01841                 dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size_2(src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
01842 
01843                 dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem);
01844                 if (!dst_ack_packet_data_ptr) {
01845                     tr_error("sn_coap_handle_blockwise_message - (recv block1) message allocation failed!");
01846                     sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01847                     handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
01848                     src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
01849                     handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
01850                     src_coap_blockwise_ack_msg_ptr = 0;
01851                     return NULL;
01852                 }
01853 
01854                 sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
01855                 handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param);
01856 
01857                 sn_coap_parser_release_allocated_coap_msg_mem(handle, src_coap_blockwise_ack_msg_ptr);
01858                 handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
01859                 dst_ack_packet_data_ptr = 0;
01860 
01861                 received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVING;
01862 
01863             } else {
01864                 /* * * This is the last block when whole Blockwise payload from received * * */
01865                 /* * * blockwise messages is gathered and returned to User               * * */
01866 
01867                 /* Store last Blockwise payload to Linked list */
01868                 uint16_t payload_len            = 0;
01869                 uint8_t *payload_ptr            = sn_coap_protocol_linked_list_blockwise_payload_search(handle, src_addr_ptr, &payload_len);
01870                 uint32_t whole_payload_len      = sn_coap_protocol_linked_list_blockwise_payloads_get_len(handle, src_addr_ptr);
01871                 uint8_t *temp_whole_payload_ptr = NULL;
01872 
01873                 temp_whole_payload_ptr = handle->sn_coap_protocol_malloc(whole_payload_len);
01874                 if (temp_whole_payload_ptr == NULL || whole_payload_len > UINT16_MAX) {
01875                     tr_error("sn_coap_handle_blockwise_message - (recv block1) failed to allocate all blocks!");
01876                     sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01877                     handle->sn_coap_protocol_free(temp_whole_payload_ptr);
01878                     return 0;
01879                 }
01880 
01881                 // In block message case, payload_ptr freeing must be done in application level
01882                 received_coap_msg_ptr->payload_ptr = temp_whole_payload_ptr;
01883                 received_coap_msg_ptr->payload_len = whole_payload_len;
01884 
01885                 /* Copy stored Blockwise payloads to returned whole Blockwise payload pointer */
01886                 while (payload_ptr != NULL) {
01887                     memcpy(temp_whole_payload_ptr, payload_ptr, payload_len);
01888                     temp_whole_payload_ptr += payload_len;
01889                     sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(handle);
01890                     payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(handle, src_addr_ptr, &payload_len);
01891                 }
01892                 received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED;
01893             }
01894         }
01895     }
01896 
01897 
01898     /* Block2 Option in a response (e.g., a 2.05 response for GET) */
01899     /* Message ID must be same than in received message */
01900     else {
01901         //This is response to request we made
01902         if (received_coap_msg_ptr->msg_code > COAP_MSG_CODE_REQUEST_DELETE) {
01903             if (handle->sn_coap_internal_block2_resp_handling) {
01904                 uint32_t block_number = 0;
01905 
01906                 /* Store blockwise payload to Linked list */
01907                 //todo: add block number to stored values - just to make sure all packets are in order
01908                 sn_coap_protocol_linked_list_blockwise_payload_store(handle,
01909                                                                      src_addr_ptr,
01910                                                                      received_coap_msg_ptr->payload_len,
01911                                                                      received_coap_msg_ptr->payload_ptr,
01912                                                                      received_coap_msg_ptr->options_list_ptr->block2 >> 4);
01913                 /* If not last block (more value is set) */
01914                 if (received_coap_msg_ptr->options_list_ptr->block2 & 0x08) {
01915                     coap_blockwise_msg_s *previous_blockwise_msg_ptr = NULL;
01916                     //build and send ack
01917                     received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVING;
01918 
01919                     ns_list_foreach(coap_blockwise_msg_s, msg, &handle->linked_list_blockwise_sent_msgs) {
01920                         if (received_coap_msg_ptr->msg_id == msg->coap_msg_ptr->msg_id) {
01921                             previous_blockwise_msg_ptr = msg;
01922                             break;
01923                         }
01924                     }
01925 
01926                     if (!previous_blockwise_msg_ptr || !previous_blockwise_msg_ptr->coap_msg_ptr) {
01927                         tr_error("sn_coap_handle_blockwise_message - (send block2) previous message null!");
01928                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01929                         return 0;
01930                     }
01931 
01932                     src_coap_blockwise_ack_msg_ptr = sn_coap_parser_alloc_message(handle);
01933                     if (src_coap_blockwise_ack_msg_ptr == NULL) {
01934                         tr_error("sn_coap_handle_blockwise_message - (send block2) failed to allocate message!");
01935                         return 0;
01936                     }
01937 
01938                     /* * * Then build CoAP Acknowledgement message * * */
01939 
01940                     if (sn_coap_parser_alloc_options(handle, src_coap_blockwise_ack_msg_ptr) == NULL) {
01941                         tr_error("sn_coap_handle_blockwise_message - (send block2) failed to allocate options!");
01942                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
01943                         src_coap_blockwise_ack_msg_ptr = 0;
01944                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
01945                         return NULL;
01946                     }
01947 
01948                     src_coap_blockwise_ack_msg_ptr->msg_id = message_id++;
01949                     if (message_id == 0) {
01950                         message_id = 1;
01951                     }
01952 
01953                     /* Update block option */
01954                     block_temp = received_coap_msg_ptr->options_list_ptr->block2 & 0x07;
01955 
01956                     block_number = received_coap_msg_ptr->options_list_ptr->block2 >> 4;
01957                     block_number ++;
01958 
01959                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2 = (block_number << 4) | block_temp;
01960 
01961 
01962                     /* Set BLOCK2 (subsequent) GET msg code and copy uri path from previous msg*/
01963                     if (received_coap_msg_ptr->msg_code == COAP_MSG_CODE_RESPONSE_CONTENT) {
01964                         src_coap_blockwise_ack_msg_ptr->msg_code = COAP_MSG_CODE_REQUEST_GET;
01965                         if (previous_blockwise_msg_ptr->coap_msg_ptr->uri_path_ptr) {
01966                             src_coap_blockwise_ack_msg_ptr->uri_path_len = previous_blockwise_msg_ptr->coap_msg_ptr->uri_path_len;
01967                             src_coap_blockwise_ack_msg_ptr->uri_path_ptr = handle->sn_coap_protocol_malloc(previous_blockwise_msg_ptr->coap_msg_ptr->uri_path_len);
01968                             if (!src_coap_blockwise_ack_msg_ptr->uri_path_ptr) {
01969                                 sn_coap_parser_release_allocated_coap_msg_mem(handle, src_coap_blockwise_ack_msg_ptr);
01970                                 tr_error("sn_coap_handle_blockwise_message - failed to allocate for uri path ptr!");
01971                                 return NULL;
01972                             }
01973                             memcpy(src_coap_blockwise_ack_msg_ptr->uri_path_ptr, previous_blockwise_msg_ptr->coap_msg_ptr->uri_path_ptr, previous_blockwise_msg_ptr->coap_msg_ptr->uri_path_len);
01974                         }
01975                         if (previous_blockwise_msg_ptr->coap_msg_ptr->token_ptr) {
01976                             src_coap_blockwise_ack_msg_ptr->token_len = previous_blockwise_msg_ptr->coap_msg_ptr->token_len;
01977                             src_coap_blockwise_ack_msg_ptr->token_ptr = handle->sn_coap_protocol_malloc(previous_blockwise_msg_ptr->coap_msg_ptr->token_len);
01978                             if (!src_coap_blockwise_ack_msg_ptr->token_ptr) {
01979                                 sn_coap_parser_release_allocated_coap_msg_mem(handle, src_coap_blockwise_ack_msg_ptr);
01980                                 tr_error("sn_coap_handle_blockwise_message - failed to allocate for token ptr!");
01981                                 return NULL;
01982                             }
01983                             memcpy(src_coap_blockwise_ack_msg_ptr->token_ptr, previous_blockwise_msg_ptr->coap_msg_ptr->token_ptr, previous_blockwise_msg_ptr->coap_msg_ptr->token_len);
01984                         }
01985                     }
01986 
01987                     ns_list_remove(&handle->linked_list_blockwise_sent_msgs, previous_blockwise_msg_ptr);
01988                     if (previous_blockwise_msg_ptr->coap_msg_ptr) {
01989                         if (previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr) {
01990                             handle->sn_coap_protocol_free(previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr);
01991                             previous_blockwise_msg_ptr->coap_msg_ptr->payload_ptr = 0;
01992                         }
01993                         sn_coap_parser_release_allocated_coap_msg_mem(handle, previous_blockwise_msg_ptr->coap_msg_ptr);
01994                         previous_blockwise_msg_ptr->coap_msg_ptr = 0;
01995                     }
01996                     handle->sn_coap_protocol_free(previous_blockwise_msg_ptr);
01997                     previous_blockwise_msg_ptr = 0;
01998 
01999                     /* Then get needed memory count for Packet data */
02000                     dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size_2(src_coap_blockwise_ack_msg_ptr ,handle->sn_coap_block_data_size);
02001 
02002                     /* Then allocate memory for Packet data */
02003                     dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem);
02004 
02005                     if (dst_ack_packet_data_ptr == NULL) {
02006                         tr_error("sn_coap_handle_blockwise_message - (send block2) failed to allocate packet!");
02007                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
02008                         src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
02009                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
02010                         src_coap_blockwise_ack_msg_ptr = 0;
02011                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
02012                         return NULL;
02013                     }
02014                     memset(dst_ack_packet_data_ptr, 0, dst_packed_data_needed_mem);
02015 
02016                     /* * * Then build Acknowledgement message to Packed data * * */
02017                     if ((sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size)) < 0) {
02018                         tr_error("sn_coap_handle_blockwise_message - (send block2) builder failed!");
02019                         handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
02020                         dst_ack_packet_data_ptr = 0;
02021                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
02022                         src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
02023                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
02024                         src_coap_blockwise_ack_msg_ptr = 0;
02025                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
02026                         return NULL;
02027                     }
02028 
02029                     /* * * Save to linked list * * */
02030                     coap_blockwise_msg_s *stored_blockwise_msg_ptr;
02031 
02032                     stored_blockwise_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_blockwise_msg_s));
02033                     if (!stored_blockwise_msg_ptr) {
02034                         tr_error("sn_coap_handle_blockwise_message - (send block2) failed to allocate blockwise message!");
02035                         handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
02036                         dst_ack_packet_data_ptr = 0;
02037                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
02038                         src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
02039                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
02040                         src_coap_blockwise_ack_msg_ptr = 0;
02041                         sn_coap_parser_release_allocated_coap_msg_mem(handle, received_coap_msg_ptr);
02042                         return 0;
02043                     }
02044                     memset(stored_blockwise_msg_ptr, 0, sizeof(coap_blockwise_msg_s));
02045 
02046                     stored_blockwise_msg_ptr->timestamp = handle->system_time;
02047 
02048                     stored_blockwise_msg_ptr->coap_msg_ptr = src_coap_blockwise_ack_msg_ptr;
02049                     stored_blockwise_msg_ptr->coap = handle;
02050                     ns_list_add_to_end(&handle->linked_list_blockwise_sent_msgs, stored_blockwise_msg_ptr);
02051 
02052                     /* * * Then release memory of CoAP Acknowledgement message * * */
02053                     handle->sn_coap_tx_callback(dst_ack_packet_data_ptr,
02054                                                 dst_packed_data_needed_mem, src_addr_ptr, param);
02055 
02056     #if ENABLE_RESENDINGS
02057                     uint32_t resend_time = sn_coap_calculate_new_resend_time(handle->system_time, handle->sn_coap_resending_intervall, 0);
02058                     sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr,
02059                             dst_packed_data_needed_mem,
02060                             dst_ack_packet_data_ptr,
02061                             resend_time, param);
02062     #endif
02063                     handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
02064                     dst_ack_packet_data_ptr = 0;
02065                 }
02066 
02067                 //Last block received
02068                 else {
02069                     /* * * This is the last block when whole Blockwise payload from received * * */
02070                     /* * * blockwise messages is gathered and returned to User               * * */
02071 
02072                     /* Store last Blockwise payload to Linked list */
02073                     uint16_t payload_len            = 0;
02074                     uint8_t *payload_ptr            = sn_coap_protocol_linked_list_blockwise_payload_search(handle, src_addr_ptr, &payload_len);
02075                     uint16_t whole_payload_len      = sn_coap_protocol_linked_list_blockwise_payloads_get_len(handle, src_addr_ptr);
02076                     uint8_t *temp_whole_payload_ptr = NULL;
02077 
02078                     temp_whole_payload_ptr = handle->sn_coap_protocol_malloc(whole_payload_len);
02079                     if (!temp_whole_payload_ptr) {
02080                         tr_error("sn_coap_handle_blockwise_message - (send block2) failed to allocate whole payload!");
02081                         return 0;
02082                     }
02083 
02084                     received_coap_msg_ptr->payload_ptr = temp_whole_payload_ptr;
02085                     received_coap_msg_ptr->payload_len = whole_payload_len;
02086 
02087                     /* Copy stored Blockwise payloads to returned whole Blockwise payload pointer */
02088                     while (payload_ptr != NULL) {
02089                         memcpy(temp_whole_payload_ptr, payload_ptr, payload_len);
02090 
02091                         temp_whole_payload_ptr += payload_len;
02092 
02093                         sn_coap_protocol_linked_list_blockwise_payload_remove_oldest(handle);
02094                         payload_ptr = sn_coap_protocol_linked_list_blockwise_payload_search(handle, src_addr_ptr, &payload_len);
02095                     }
02096                     received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED;
02097 
02098                     //todo: remove previous msg from list
02099                 }
02100             }
02101         }
02102 
02103         //Now we send data to request
02104         else {
02105             //Get message by using block number
02106             //NOTE: Getting the first from list might not be correct one
02107             coap_blockwise_msg_s *stored_blockwise_msg_temp_ptr = ns_list_get_first(&handle->linked_list_blockwise_sent_msgs);
02108             if (stored_blockwise_msg_temp_ptr) {
02109                 uint16_t block_size;
02110                 uint32_t block_number;
02111 
02112                 /* Resolve block parameters */
02113                 block_number = received_coap_msg_ptr->options_list_ptr->block2 >> 4;
02114                 block_temp = received_coap_msg_ptr->options_list_ptr->block2 & 0x07;
02115                 block_size = 1u << (block_temp + 4);
02116 
02117                 /* Build response message */
02118                 src_coap_blockwise_ack_msg_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr;
02119 
02120                 if (src_coap_blockwise_ack_msg_ptr->options_list_ptr) {
02121                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block1 = COAP_OPTION_BLOCK_NONE;
02122                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2 = COAP_OPTION_BLOCK_NONE;
02123                 } else {
02124                     if (sn_coap_parser_alloc_options(handle, src_coap_blockwise_ack_msg_ptr) == NULL) {
02125                         tr_error("sn_coap_handle_blockwise_message - (recv block2) failed to allocate options!");
02126                         return 0;
02127                     }
02128                 }
02129 
02130                 src_coap_blockwise_ack_msg_ptr->msg_id = received_coap_msg_ptr->msg_id;
02131 
02132                 src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2 = received_coap_msg_ptr->options_list_ptr->block2;
02133 
02134                 /* * Payload part * */
02135 
02136                 /* Check if last block */
02137 
02138                 original_payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len;
02139                 original_payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr;
02140 
02141                 if ((block_size * (block_number + 1)) >= stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) {
02142                     src_coap_blockwise_ack_msg_ptr->payload_len = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len - (block_size * block_number);
02143                     src_coap_blockwise_ack_msg_ptr->payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr + (block_size * block_number);
02144                 }
02145                 /* Not last block */
02146                 else {
02147                     /* set more - bit */
02148                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->block2 |= 0x08;
02149                     src_coap_blockwise_ack_msg_ptr->payload_len = block_size;
02150                     src_coap_blockwise_ack_msg_ptr->payload_ptr = stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr + (block_size * block_number);
02151                 }
02152 
02153                 /* Update token to match one which is in GET request.
02154                  * This is needed only in case of notification message.
02155                 */
02156                 if (src_coap_blockwise_ack_msg_ptr->options_list_ptr &&
02157                     src_coap_blockwise_ack_msg_ptr->options_list_ptr->observe != COAP_OBSERVE_NONE) {
02158                     if (received_coap_msg_ptr->token_len && src_coap_blockwise_ack_msg_ptr->token_ptr) {
02159                         handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->token_ptr);
02160                         src_coap_blockwise_ack_msg_ptr->token_ptr = handle->sn_coap_protocol_malloc(received_coap_msg_ptr->token_len);
02161                         if (src_coap_blockwise_ack_msg_ptr->token_ptr) {
02162                             memcpy(src_coap_blockwise_ack_msg_ptr->token_ptr, received_coap_msg_ptr->token_ptr, received_coap_msg_ptr->token_len);
02163                             src_coap_blockwise_ack_msg_ptr->token_len = received_coap_msg_ptr->token_len;
02164                         }
02165                     }
02166                 }
02167 
02168                 /* Build and send block message */
02169                 dst_packed_data_needed_mem = sn_coap_builder_calc_needed_packet_data_size_2(src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
02170 
02171                 dst_ack_packet_data_ptr = handle->sn_coap_protocol_malloc(dst_packed_data_needed_mem);
02172                 if (!dst_ack_packet_data_ptr) {
02173                     tr_error("sn_coap_handle_blockwise_message - (recv block2) failed to allocate packet!");
02174                     if(original_payload_ptr){
02175                         handle->sn_coap_protocol_free(original_payload_ptr);
02176                         original_payload_ptr = NULL;
02177                     }
02178                     handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr->options_list_ptr);
02179                     src_coap_blockwise_ack_msg_ptr->options_list_ptr = 0;
02180                     handle->sn_coap_protocol_free(src_coap_blockwise_ack_msg_ptr);
02181                     stored_blockwise_msg_temp_ptr->coap_msg_ptr = NULL;
02182                     return NULL;
02183                 }
02184 
02185                 sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
02186                 handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param);
02187 
02188                 handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
02189                 dst_ack_packet_data_ptr = 0;
02190 
02191                 stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len = original_payload_len;
02192                 stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_ptr = original_payload_ptr;
02193 
02194                 if ((block_size * (block_number + 1)) >= stored_blockwise_msg_temp_ptr->coap_msg_ptr->payload_len) {
02195                     sn_coap_protocol_linked_list_blockwise_msg_remove(handle, stored_blockwise_msg_temp_ptr);
02196                 }
02197 
02198                 received_coap_msg_ptr->coap_status = COAP_STATUS_PARSER_BLOCKWISE_ACK;
02199             }
02200         }
02201     }
02202     return received_coap_msg_ptr;
02203 }
02204 
02205 int8_t sn_coap_convert_block_size(uint16_t block_size)
02206 {
02207     if (block_size == 16) {
02208         return 0;
02209     } else if (block_size == 32) {
02210         return 1;
02211     } else if (block_size == 64) {
02212         return 2;
02213     } else if (block_size == 128) {
02214         return 3;
02215     } else if (block_size == 256) {
02216         return 4;
02217     } else if (block_size == 512) {
02218         return 5;
02219     } else if (block_size == 1024) {
02220         return 6;
02221     }
02222 
02223     return 0;
02224 }
02225 
02226 static sn_coap_hdr_s *sn_coap_protocol_copy_header(struct coap_s *handle, sn_coap_hdr_s *source_header_ptr)
02227 {
02228     sn_coap_hdr_s *destination_header_ptr;
02229 
02230     destination_header_ptr = sn_coap_parser_alloc_message(handle);
02231     if (!destination_header_ptr) {
02232         tr_error("sn_coap_protocol_copy_header - failed to allocate message!");
02233         return 0;
02234     }
02235 
02236     destination_header_ptr->coap_status = source_header_ptr->coap_status;
02237     destination_header_ptr->msg_type = source_header_ptr->msg_type;
02238     destination_header_ptr->msg_code = source_header_ptr->msg_code;
02239     destination_header_ptr->msg_id = source_header_ptr->msg_id;
02240 
02241     if (source_header_ptr->uri_path_ptr) {
02242         destination_header_ptr->uri_path_len = source_header_ptr->uri_path_len;
02243         destination_header_ptr->uri_path_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->uri_path_len);
02244         if (!destination_header_ptr->uri_path_ptr) {
02245             tr_error("sn_coap_protocol_copy_header - failed to allocate uri path!");
02246             sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02247             return 0;
02248         }
02249         memcpy(destination_header_ptr->uri_path_ptr, source_header_ptr->uri_path_ptr, source_header_ptr->uri_path_len);
02250     }
02251 
02252     if (source_header_ptr->token_ptr) {
02253         destination_header_ptr->token_len = source_header_ptr->token_len;
02254         destination_header_ptr->token_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->token_len);
02255         if (!destination_header_ptr->token_ptr) {
02256             sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02257             tr_error("sn_coap_protocol_copy_header - failed to allocate token!");
02258             return 0;
02259         }
02260         memcpy(destination_header_ptr->token_ptr, source_header_ptr->token_ptr, source_header_ptr->token_len);
02261     }
02262 
02263     destination_header_ptr->content_format = source_header_ptr->content_format;
02264 
02265     /* Options list */
02266     if (source_header_ptr->options_list_ptr) {
02267         if (sn_coap_parser_alloc_options(handle, destination_header_ptr) == NULL) {
02268             sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02269             tr_error("sn_coap_protocol_copy_header - failed to allocate options!");
02270             return 0;
02271         }
02272 
02273         destination_header_ptr->options_list_ptr->max_age = source_header_ptr->options_list_ptr->max_age;
02274 
02275         if (source_header_ptr->options_list_ptr->proxy_uri_ptr) {
02276             destination_header_ptr->options_list_ptr->proxy_uri_len = source_header_ptr->options_list_ptr->proxy_uri_len;
02277             destination_header_ptr->options_list_ptr->proxy_uri_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->proxy_uri_len);
02278             if (!destination_header_ptr->options_list_ptr->proxy_uri_ptr) {
02279                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02280                 tr_error("sn_coap_protocol_copy_header - failed to allocate proxy uri!");
02281                 return 0;
02282             }
02283             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);
02284         }
02285 
02286         if (source_header_ptr->options_list_ptr->etag_ptr) {
02287             destination_header_ptr->options_list_ptr->etag_len = source_header_ptr->options_list_ptr->etag_len;
02288             destination_header_ptr->options_list_ptr->etag_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->etag_len);
02289             if (!destination_header_ptr->options_list_ptr->etag_ptr) {
02290                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02291                 tr_error("sn_coap_protocol_copy_header - failed to allocate etag!");
02292                 return 0;
02293             }
02294             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);
02295         }
02296 
02297         if (source_header_ptr->options_list_ptr->uri_host_ptr) {
02298             destination_header_ptr->options_list_ptr->uri_host_len = source_header_ptr->options_list_ptr->uri_host_len;
02299             destination_header_ptr->options_list_ptr->uri_host_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->uri_host_len);
02300             if (!destination_header_ptr->options_list_ptr->uri_host_ptr) {
02301                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02302                 tr_error("sn_coap_protocol_copy_header - failed to allocate uri host!");
02303                 return 0;
02304             }
02305             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);
02306         }
02307 
02308         if (source_header_ptr->options_list_ptr->location_path_ptr) {
02309             destination_header_ptr->options_list_ptr->location_path_len = source_header_ptr->options_list_ptr->location_path_len;
02310             destination_header_ptr->options_list_ptr->location_path_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->location_path_len);
02311             if (!destination_header_ptr->options_list_ptr->location_path_ptr) {
02312                 tr_error("sn_coap_protocol_copy_header - failed to allocate location path!");
02313                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02314                 return 0;
02315             }
02316             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);
02317         }
02318 
02319         destination_header_ptr->options_list_ptr->uri_port = source_header_ptr->options_list_ptr->uri_port;
02320 
02321         if (source_header_ptr->options_list_ptr->location_query_ptr) {
02322             destination_header_ptr->options_list_ptr->location_query_len = source_header_ptr->options_list_ptr->location_query_len;
02323             destination_header_ptr->options_list_ptr->location_query_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->location_query_len);
02324             if (!destination_header_ptr->options_list_ptr->location_query_ptr) {
02325                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02326                 tr_error("sn_coap_protocol_copy_header - failed to allocate location query!");
02327                 return 0;
02328             }
02329             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);
02330         }
02331 
02332         destination_header_ptr->options_list_ptr->observe = source_header_ptr->options_list_ptr->observe;
02333         destination_header_ptr->options_list_ptr->accept = source_header_ptr->options_list_ptr->accept;
02334 
02335         if (source_header_ptr->options_list_ptr->uri_query_ptr) {
02336             destination_header_ptr->options_list_ptr->uri_query_len = source_header_ptr->options_list_ptr->uri_query_len;
02337             destination_header_ptr->options_list_ptr->uri_query_ptr = handle->sn_coap_protocol_malloc(source_header_ptr->options_list_ptr->uri_query_len);
02338             if (!destination_header_ptr->options_list_ptr->uri_query_ptr) {
02339                 sn_coap_parser_release_allocated_coap_msg_mem(handle, destination_header_ptr);
02340                 tr_error("sn_coap_protocol_copy_header - failed to allocate uri query!");
02341                 return 0;
02342             }
02343             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);
02344         }
02345 
02346         destination_header_ptr->options_list_ptr->block1 = source_header_ptr->options_list_ptr->block1;
02347         destination_header_ptr->options_list_ptr->block2 = source_header_ptr->options_list_ptr->block2;
02348     }
02349 
02350     return destination_header_ptr;
02351 }
02352 #endif