add smscb creation timestamp

Change-Id: I72cd9693eb774e21f5696217b5eea5965af952fb

src/cbc_data.h

@@ -1,6 +1,7 @@
 #pragma once
 #include <stdint.h>
 #include <stdbool.h>
+#include <time.h>
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/it_q.h>
 #include <osmocom/gsm/protocol/gsm_48_049.h>
@@ -150,10 +151,9 @@ struct cbc_message {
 
 	struct rest_it_op *it_op;	/* inter-thread queue operation currently processing */
 
-	/* TODO:
-	 * - timer for timeout after warning_period_sec
-	 * - timestamp when the message was created / last updated
-	 **/
+	struct {
+		time_t created;		/* when was this message created? */
+	} time;
 };
 
 /*********************************************************************************

src/smscb_message_fsm.c

@@ -369,6 +369,7 @@ struct cbc_message *cbc_message_alloc(void *ctx, const struct cbc_message *orig_
 	INIT_LLIST_HEAD(&smscb->peers);
 	smscb->fi = fi;
 	smscb->it_op = NULL;
+	smscb->time.created = time(NULL);
 
 	fi->priv = smscb;