net: lwm2m: Support for "Mute Server" resource

Added support for server Mute send operation.

Signed-off-by: Juha Heiskanen <juha.heiskanen@nordicsemi.no>

subsys/net/lib/lwm2m/lwm2m_engine.c

@@ -6155,6 +6155,7 @@ static int do_send_op(struct lwm2m_message *msg, uint16_t content_format,
 	}
 }
 
+#if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
 static int do_send_reply_cb(const struct coap_packet *response,
 				 struct coap_reply *reply,
 				 const struct sockaddr *from)
@@ -6182,10 +6183,12 @@ static void do_send_timeout_cb(struct lwm2m_message *msg)
 	LOG_WRN("Send Timeout");
 
 }
+#endif
 
 int lwm2m_engine_send(struct lwm2m_ctx *ctx, char const *path_list[], uint8_t path_list_size,
 		      bool confirmation_request)
 {
+#if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
 	struct lwm2m_message *msg;
 	int ret;
 	uint16_t content_format;
@@ -6196,6 +6199,11 @@ int lwm2m_engine_send(struct lwm2m_ctx *ctx, char const *path_list[], uint8_t pa
 	sys_slist_t lwm2m_path_list;
 	sys_slist_t lwm2m_path_free_list;
 
+	if (lwm2m_server_get_mute_send(ctx->srv_obj_inst)) {
+		LOG_WRN("Send operation is muted by server");
+		return -EPERM;
+	}
+
 	/* Init list */
 	lwm2m_engine_path_list_init(&lwm2m_path_list, &lwm2m_path_free_list, lwm2m_path_list_buf,
 				    CONFIG_LWM2M_COMPOSITE_PATH_LIST_SIZE);
@@ -6278,6 +6286,10 @@ int lwm2m_engine_send(struct lwm2m_ctx *ctx, char const *path_list[], uint8_t pa
 cleanup:
 	lwm2m_reset_message(msg, true);
 	return ret;
+#else
+	LOG_WRN("LwM2M send is only supported for CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1");
+	return -ENOTSUP;
+#endif
 }
 
 SYS_INIT(lwm2m_engine_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

subsys/net/lib/lwm2m/lwm2m_engine.h

@@ -166,6 +166,10 @@ int32_t lwm2m_server_get_pmin(uint16_t obj_inst_id);
 int32_t lwm2m_server_get_pmax(uint16_t obj_inst_id);
 int lwm2m_server_short_id_to_inst(uint16_t short_id);
 
+#if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
+bool lwm2m_server_get_mute_send(uint16_t obj_inst_id);
+#endif
+
 #if defined(CONFIG_LWM2M_FIRMWARE_UPDATE_OBJ_SUPPORT)
 void lwm2m_firmware_set_update_state_inst(uint16_t obj_inst_id, uint8_t state);
 void lwm2m_firmware_set_update_result_inst(uint16_t obj_inst_id, uint8_t result);

subsys/net/lib/lwm2m/lwm2m_obj_server.c

@@ -82,6 +82,9 @@ static uint8_t  server_flag_disabled[MAX_INSTANCE_COUNT];
 static uint32_t disabled_timeout[MAX_INSTANCE_COUNT];
 static uint8_t  server_flag_store_notify[MAX_INSTANCE_COUNT];
 static char  transport_binding[MAX_INSTANCE_COUNT][TRANSPORT_BINDING_LEN];
+#if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
+static bool mute_send[MAX_INSTANCE_COUNT];
+#endif
 
 static struct lwm2m_engine_obj server;
 static struct lwm2m_engine_obj_field fields[] = {
@@ -156,6 +159,18 @@ static int bootstrap_trigger_cb(uint16_t obj_inst_id,
 	return -EPERM;
 #endif
 }
+
+bool lwm2m_server_get_mute_send(uint16_t obj_inst_id)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(inst); i++) {
+		if (inst[i].obj && inst[i].obj_inst_id == obj_inst_id) {
+			return mute_send[i];
+		}
+	}
+	return false;
+}
 #endif /* defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1) */
 
 
@@ -252,6 +267,10 @@ static struct lwm2m_engine_obj_inst *server_create(uint16_t obj_inst_id)
 	default_min_period[index] = CONFIG_LWM2M_SERVER_DEFAULT_PMIN;
 	default_max_period[index] = CONFIG_LWM2M_SERVER_DEFAULT_PMAX;
 	disabled_timeout[index] = 86400U;
+#if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
+	mute_send[index] = false;
+#endif
+
 	lwm2m_engine_get_binding(transport_binding[index]);
 
 	(void)memset(res[index], 0,
@@ -312,7 +331,8 @@ static struct lwm2m_engine_obj_inst *server_create(uint16_t obj_inst_id)
 			     res_inst[index], j);
 	INIT_OBJ_RES_OPTDATA(SERVER_SMS_TRIGGER_ID, res[index], i, res_inst[index], j);
 	INIT_OBJ_RES_OPTDATA(SERVER_PREFERRED_TRANSPORT_ID, res[index], i, res_inst[index], j);
-	INIT_OBJ_RES_OPTDATA(SERVER_MUTE_SEND_ID, res[index], i, res_inst[index], j);
+	INIT_OBJ_RES_DATA(SERVER_MUTE_SEND_ID, res[index], i, res_inst[index], j, &mute_send[index],
+			  sizeof(bool));
 #endif /* defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1) */
 
 	inst[index].resources = res[index];