logging: Make logging handler declaration public

The logging handler function can be customized. Therefore it belongs
into to puplic header of Wakaama.

core/internals.h

@@ -64,17 +64,6 @@
 
 #include "er-coap-13/er-coap-13.h"
 
-#define LWM2M_DBG (10)
-#define LWM2M_INFO (20)
-#define LWM2M_WARN (30)
-#define LWM2M_ERR (40)
-#define LWM2M_FATAL (50)
-#define LWM2M_LOG_DISABLED (0xff)
-
-#ifndef LWM2M_LOG_LEVEL
-#define LWM2M_LOG_LEVEL LWM2M_LOG_DISABLED
-#endif
-
 #if LWM2M_LOG_LEVEL != LWM2M_LOG_DISABLED
 #include <inttypes.h>
 
@@ -88,14 +77,6 @@
 #define LWM2M_LOG_MAX_MSG_TXT_SIZE 200
 #endif
 
-typedef enum {
-    LWM2M_LOGGING_DBG = (uint8_t)LWM2M_DBG,
-    LWM2M_LOGGING_INFO = (uint8_t)LWM2M_INFO,
-    LWM2M_LOGGING_WARN = (uint8_t)LWM2M_WARN,
-    LWM2M_LOGGING_ERR = (uint8_t)LWM2M_ERR,
-    LWM2M_LOGGING_FATAL = (uint8_t)LWM2M_FATAL
-} lwm2m_logging_level_t;
-
 /* clang-format off */
 #define STR_LOGGING_LEVEL(level) \
 ((level) == LWM2M_LOGGING_DBG ? "DBG" : \
@@ -110,12 +91,6 @@ typedef enum {
  * This function should not be called directly. It's used internally in the logging system. */
 char *lwm2m_log_fmt_message(const char *fmt, ...);
 
-/** The default log handler for an log entry. To define a custom log handler define `LWM2M_LOG_CUSTOM_HANDLER` and
- * implement a function with this signature.
- * This function should not be called directly. Use the logging macros instead. */
-void lwm2m_log_handler(lwm2m_logging_level_t level, const char *const msg, const char *const func, const int line,
-                       const char *const file);
-
 /** Basic logging macro. Usually this is not called directly. Use the macros for a given level (e.g. LOG_DBG).
  * Supports arguments if the message (including format specifiers) is a string literal. Otherwise the use uf
  * LOG_ARG_DBG (and related macros) are needed.

include/liblwm2m.h

@@ -924,6 +924,35 @@ int lwm2m_bootstrap_read(lwm2m_context_t * contextP, void * sessionH, lwm2m_uri_
 #endif
 #endif
 
+/* Logging related public functionality */
+
+/* Logging level values used for preprocessor */
+#define LWM2M_DBG (10)
+#define LWM2M_INFO (20)
+#define LWM2M_WARN (30)
+#define LWM2M_ERR (40)
+#define LWM2M_FATAL (50)
+#define LWM2M_LOG_DISABLED (0xff)
+
+#ifndef LWM2M_LOG_LEVEL
+#define LWM2M_LOG_LEVEL LWM2M_LOG_DISABLED
+#endif
+
+/** Logging levels */
+typedef enum {
+    LWM2M_LOGGING_DBG = (uint8_t)LWM2M_DBG,
+    LWM2M_LOGGING_INFO = (uint8_t)LWM2M_INFO,
+    LWM2M_LOGGING_WARN = (uint8_t)LWM2M_WARN,
+    LWM2M_LOGGING_ERR = (uint8_t)LWM2M_ERR,
+    LWM2M_LOGGING_FATAL = (uint8_t)LWM2M_FATAL
+} lwm2m_logging_level_t;
+
+/** The default log handler for an log entry. To define a custom log handler define `LWM2M_LOG_CUSTOM_HANDLER` and
+ * implement a function with this signature.
+ * This function should not be called directly. Use the logging macros instead. */
+void lwm2m_log_handler(lwm2m_logging_level_t level, const char *const msg, const char *const func, const int line,
+                       const char *const file);
+
 #ifdef __cplusplus
 }
 #endif