+/* Log function callback. */
+typedef void (*SilcLogCb)(char *message);
+
+/* Debug function callback. */
+typedef void (*SilcDebugCb)(char *file, char *function,
+ int line, char *message);
+
+/* Debug hexdump function callback. */
+typedef void (*SilcDebugHexdumpCb)(char *file, char *function,
+ int line, unsigned char *data,
+ unsigned int data_len, char *message);
+