coap: Allow to set WAKAAMA_COAP_SEPARATE_TIMEOUT via CMake

The timeout for separate ack can be configured with CMake variable.

Signed-off-by: Sebastian Schoch <sebastian.schoch@husqvarnagroup.com>

README.md

@@ -86,6 +86,7 @@ The following data formats are configurable for Wakaama:
 - WAKAAMA_COAP_MAX_MESSAGE_SIZE Max size of a CoAP packet including headers and options.
 - WAKAAMA_COAP_DEFAULT_BLOCK_SIZE CoAP block size used by CoAP layer when performing block-wise transfers. Possible values: 16, 32, 64, 128, 256, 512 and 1024. Defaults to 1024.
 - WAKAAMA_COAP_DEFAULT_MAX_RETRANSMIT The maximum number of retransmissions used for confirmable messages.
+- WAKAAMA_COAP_SEPARATE_TIMEOUT: The max time to wait between the empty ack and the separate response message.
 
 
 ### Logging

coap/er-coap-13/er-coap-13.h

@@ -48,7 +48,7 @@
 
 #define COAP_DEFAULT_MAX_AGE                 60
 #define COAP_RESPONSE_TIMEOUT                2
-#define COAP_SEPARATE_TIMEOUT                15
+#define COAP_SEPARATE_TIMEOUT                LWM2M_COAP_SEPARATE_TIMEOUT
 #define COAP_MAX_RETRANSMIT                  LWM2M_COAP_DEFAULT_MAX_RETRANSMIT
 #define COAP_ACK_RANDOM_FACTOR               1.5
 #define COAP_MAX_LATENCY                     100

wakaama.cmake

@@ -59,6 +59,12 @@ set(WAKAAMA_COAP_DEFAULT_MAX_RETRANSMIT
     CACHE STRING "Default CoAP max retransmissions"
 )
 
+# The max time to wait between the empty ack and the separate response message.
+set(WAKAAMA_COAP_SEPARATE_TIMEOUT
+    15
+    CACHE STRING "CoAP separate response timeout; Used if not set on a per-target basis"
+)
+
 # Logging
 set(WAKAAMA_LOG_LEVEL
     LOG_DISABLED
@@ -165,6 +171,8 @@ function(set_coap_defines)
     target_compile_definitions(
         ${target} PUBLIC LWM2M_COAP_DEFAULT_MAX_RETRANSMIT=${WAKAAMA_COAP_DEFAULT_MAX_RETRANSMIT}
     )
+
+    target_compile_definitions(${target} PUBLIC LWM2M_COAP_SEPARATE_TIMEOUT=${WAKAAMA_COAP_SEPARATE_TIMEOUT})
 endfunction()
 
 # Set the defines for logging configuration