Merge pull request #6618 from anttiylitokola/master

Update mbed-coap to version 4.4.2

features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Change Log
 
+## [v4.4.2](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.4.2) 
+**Closed issues:**
+ - IOTCLT-2469 CoAP UDP retransmission does not work for blocks after first one for requests (Eg. registration POST)
+
+-[Full Changelog](https://github.com/ARMmbed/mbed-coap/compare/v4.4.1...v4.4.2)
+
 ## [v4.4.1](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.4.1) 
 **Closed issues:**
  - IOTCLT-2539 Block wise messaging call-backs not working logically

features/FEATURE_COMMON_PAL/mbed-coap/module.json

@@ -1,6 +1,6 @@
 {
   "name": "mbed-coap",
-  "version": "4.4.1",
+  "version": "4.4.2",
   "description": "COAP library",
   "keywords": [
     "coap",

features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c

@@ -1732,8 +1732,17 @@ static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn
                     }
 
                     sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
+
                     handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param);
 
+#if ENABLE_RESENDINGS
+                    uint32_t resend_time = sn_coap_calculate_new_resend_time(handle->system_time, handle->sn_coap_resending_intervall, 0);
+                    sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr,
+                            dst_packed_data_needed_mem,
+                            dst_ack_packet_data_ptr,
+                            resend_time, param);
+#endif
+
                     handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
                     dst_ack_packet_data_ptr = 0;