+#define DEBUG_ARM GNUNET_EXTRA_LOGGING
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Status update from ARM to client.
+ */
+struct GNUNET_ARM_StatusMessage
+{
+ /**
+ * Reply to client, of type is #GNUNET_MESSAGE_TYPE_ARM_STATUS.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Status from the 'enum GNUNET_ARM_ServiceStatus'
+ */
+ uint32_t status;
+
+ /* followed by a 0-terminated service name */
+};
+
+struct GNUNET_ARM_Message
+{
+ /**
+ * Reply to client, type is #GNUNET_MESSAGE_TYPE_ARM_RESULT or
+ * #GNUNET_MESSAGE_TYPE_ARM_LIST_RESULT.
+ * OR
+ * Request from client, type is #GNUNET_MESSAGE_TYPE_ARM_START or
+ * #GNUNET_MESSAGE_TYPE_ARM_STOP.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * For alignment.
+ */
+ uint32_t reserved;
+
+ /**
+ * ID of a request that is being replied to.
+ * OR
+ * ID of a request that is being sent.
+ */
+ uint64_t request_id;
+
+ /* For requests - followed by a 0-terminated service name */
+};
+
+
+/**
+ * Reply from ARM to client.
+ */
+struct GNUNET_ARM_ResultMessage
+{
+ /**
+ * Reply to client, of type is #GNUNET_MESSAGE_TYPE_ARM_RESULT, with an ID.
+ */
+ struct GNUNET_ARM_Message arm_msg;
+
+ /**
+ * Result from the `enum GNUNET_ARM_Result`
+ */
+ uint32_t result;
+};
+
+struct GNUNET_ARM_ServiceInfoMessage
+{
+ /**
+ * String pool index for the service's name.
+ */
+ uint16_t name_index;
+
+ /**
+ * String pool index for the service's binary.
+ */
+ uint16_t binary_index;
+
+ /**
+ * Last process exit status.
+ */
+ int16_t last_exit_status;
+
+ /**
+ * Padding.
+ */
+ uint16_t padding;
+
+ /**
+ * Status from the 'enum GNUNET_ARM_ServiceStatus'
+ */
+ uint32_t status;
+
+ /**
+ * Time when the sevice will be restarted, if applicable
+ * to the current status.
+ */
+ struct GNUNET_TIME_AbsoluteNBO restart_at;
+
+ /**
+ * Time when the sevice was first started, if applicable.
+ */
+ struct GNUNET_TIME_AbsoluteNBO last_started_at;
+};
+
+/**
+ * Reply from ARM to client for the
+ * #GNUNET_MESSAGE_TYPE_ARM_LIST request followed by count
+ * '\0' terminated strings. header->size contains the
+ * total size (including all strings).
+ */
+struct GNUNET_ARM_ListResultMessage
+{
+ /**
+ * Reply to client, of type is #GNUNET_MESSAGE_TYPE_ARM_LIST_RESULT,
+ * with an ID.
+ */
+ struct GNUNET_ARM_Message arm_msg;
+
+ /**
+ * Number of 'struct GNUNET_ARM_ServiceInfoMessage' that
+ * are at the end of this message.
+ */
+ uint16_t count;
+
+ /* struct GNUNET_ARM_ServiceInfoMessage[count]; */
+ /* pool of 0-terminated strings */
+};
+
+GNUNET_NETWORK_STRUCT_END