--- libaitmqtt/inc/aitmqtt.h	2013/05/30 09:18:33	1.3
+++ libaitmqtt/inc/aitmqtt.h	2022/09/12 21:52:57	1.3.4.2
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitmqtt.h,v 1.3 2013/05/30 09:18:33 misho Exp $
+* $Id: aitmqtt.h,v 1.3.4.2 2022/09/12 21:52:57 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -12,7 +12,7 @@ terms:
 All of the documentation and software included in the ELWIX and AITNET
 Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
 
-Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+Copyright 2004 - 2022
 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -49,7 +49,7 @@ SUCH DAMAGE.
 
 #define MAX_CONNID		24
 #define MAX_CRED		13
-#define MQTTMSG_MAX		65529
+#define MQTTMSG_MAX		65535
 #define MQTT_DATA_MAX		268435455
 
 #define MQTT_PROTO_VER		3
@@ -69,7 +69,7 @@ struct mqtthdr {
 		unsigned char		val;
 	} mqtt_msg;
 	unsigned char			mqtt_len[1];	/* may be grow to 4 bytes */
-} __packed;
+} __attribute__((packed));
 #define MQTTHDR_MSGINIT(x)	(assert((x)), (x)->mqtt_msg.val ^= (x)->mqtt_msg.val)
 #define MQTTHDR_DATA_SIZEOF(x)	(assert((x)), mqtt_decodeLen((x)->mqtt_len, NULL))
 
@@ -88,6 +88,7 @@ struct mqtthdr {
 #define MQTT_TYPE_PINGREQ	12	/* PING request */
 #define MQTT_TYPE_PINGRESP	13	/* PING response */
 #define MQTT_TYPE_DISCONNECT	14	/* client is disconnecting */
+#define MQTT_TYPE_AUTH		15	/* authentication exchange */
 #define MQTT_TYPE_MAX		15	/* reserved */
 
 #define MQTT_FLAG_DUP		1	/* This flag is set when the client or server attempts to re-deliver 
@@ -170,7 +171,7 @@ typedef struct {
 typedef struct {
 	mqtt_len_t	var_sb;
 	unsigned char	var_data[0];
-} __packed mqtthdr_var_t;
+} __attribute__((packed)) mqtthdr_var_t;
 #define MQTTHDR_VAR_SIZEOF(x)		(assert((x)), sizeof(mqtt_len_t) + ntohs((x)->var_sb.val))
 
 typedef unsigned char mqtthdr_protover_t;
@@ -186,12 +187,12 @@ typedef union {
 				username:1;
 	};
 	unsigned char		flags;
-} __packed mqtthdr_connflgs_t;
+} __attribute__((packed)) mqtthdr_connflgs_t;
 
 typedef struct {
 	unsigned char	reserved;
 	unsigned char	retcode;
-} __packed mqtthdr_connack_t;
+} __attribute__((packed)) mqtthdr_connack_t;
 
 
 // -------------------------------------------------------