--- mqtt/src/Attic/sub.c	2011/11/22 13:00:33	1.1.2.6
+++ mqtt/src/Attic/sub.c	2011/11/22 14:00:09	1.1.2.7
@@ -43,13 +43,11 @@ mqtt_msgSUBSCRIBE(mqtt_msg_t * __restrict buf, mqtt_su
 	}
 
 	/* variable header */
-
 	mid = (mqtt_v_t*) (buf->msg_base + siz);
 	mid->val = htons(msgID);
 	siz += sizeof(mqtt_v_t);
 
 	/* payload with subscriptions */
-
 	for (t = Topics; t && t->sub_data; t++) {
 		topic = (mqtthdr_var_t*) (buf->msg_base + siz);
 		topic->var_sb.val = t->sub_sb.val;
@@ -61,7 +59,7 @@ mqtt_msgSUBSCRIBE(mqtt_msg_t * __restrict buf, mqtt_su
 	}
 
 	/* fixed header */
-
+	MQTTHDR_MSGINIT(hdr);
 	hdr->mqtt_msg.type = MQTT_TYPE_SUBSCRIBE;
 	hdr->mqtt_msg.qos = QOS;
 	hdr->mqtt_msg.dup = Dup ? 1 : 0;
@@ -105,7 +103,6 @@ mqtt_msgSUBACK(mqtt_msg_t * __restrict buf, mqtt_subsc
 	v->val = htons(msgID);
 
 	/* QoS payload from subscriptions */
-
 	for (t = Topics; t && t->sub_data; t++) {
 		qos = (buf->msg_base + siz);
 		*qos = t->sub_qos;
@@ -113,9 +110,110 @@ mqtt_msgSUBACK(mqtt_msg_t * __restrict buf, mqtt_subsc
 	}
 
 	/* fixed header */
+	MQTTHDR_MSGINIT(hdr);
 	hdr->mqtt_msg.type = MQTT_TYPE_SUBACK;
 	*hdr->mqtt_len = mqtt_encodeLen(siz - sizeof(struct mqtthdr));
 
 	mqtt_msgRealloc(buf, siz);
+	return siz;
+}
+
+/*
+ * mqtt_msgUNSUBSCRIBE() Create UNSUBSCRIBE message
+ *
+ * @buf = Message buffer
+ * @Topics = MQTT subscription topics
+ * @msgID = MessageID
+ * @Dup = Duplicate message
+ * @QOS = QoS
+ * return: -1 error or >-1 message size for send
+ */
+int
+mqtt_msgUNSUBSCRIBE(mqtt_msg_t * __restrict buf, mqtt_subscr_t * __restrict Topics, 
+		u_short msgID, u_char Dup, u_char QOS)
+{
+	int siz = 0;
+	struct mqtthdr *hdr;
+	mqtthdr_var_t *topic;
+	mqtt_v_t *mid;
+	mqtt_subscr_t *t;
+
+	if (!buf || !Topics)
+		return -1;
+	if (QOS > MQTT_QOS_EXACTLY) {
+		mqtt_SetErr(EINVAL, "Error:: invalid QoS parameter");
+		return -1;
+	}
+	if (!msgID && QOS != MQTT_QOS_ONCE) {
+		mqtt_SetErr(EINVAL, "Error:: invalid MessageID parameter must be >0");
+		return -1;
+	}
+
+	if (mqtt_msgRealloc(buf, MQTTMSG_MAX) == -1)
+		return -1;
+	else {
+		hdr = (struct mqtthdr *) (buf->msg_base + siz);
+		siz += sizeof(struct mqtthdr);
+	}
+
+	/* variable header */
+	mid = (mqtt_v_t*) (buf->msg_base + siz);
+	mid->val = htons(msgID);
+	siz += sizeof(mqtt_v_t);
+
+	/* payload with subscriptions */
+	for (t = Topics; t && t->sub_data; t++) {
+		topic = (mqtthdr_var_t*) (buf->msg_base + siz);
+		topic->var_sb.val = t->sub_sb.val;
+		memcpy(topic->var_data, t->sub_data, ntohs(topic->var_sb.val));
+		siz += MQTTHDR_VAR_SIZEOF(topic);
+	}
+
+	/* fixed header */
+	MQTTHDR_MSGINIT(hdr);
+	hdr->mqtt_msg.type = MQTT_TYPE_UNSUBSCRIBE;
+	hdr->mqtt_msg.qos = QOS;
+	hdr->mqtt_msg.dup = Dup ? 1 : 0;
+	hdr->mqtt_msg.retain = 0;
+	*hdr->mqtt_len = mqtt_encodeLen(siz - sizeof(struct mqtthdr));
+
+	mqtt_msgRealloc(buf, siz);
+	return siz;
+}
+
+/*
+ * mqtt_msgUNSUBACK() Create UNSUBACK message
+ *
+ * @buf = Message buffer
+ * @msgID = MessageID
+ * return: -1 error or >-1 message size for send
+ */
+int
+mqtt_msgUNSUBACK(mqtt_msg_t * __restrict buf, u_short msgID)
+{
+	int siz = 0;
+	struct mqtthdr *hdr;
+	mqtt_v_t *v;
+
+	if (!buf)
+		return -1;
+
+	if (mqtt_msgRealloc(buf, sizeof(struct mqtthdr) + sizeof(mqtt_v_t)) == -1)
+		return -1;
+	else {
+		hdr = (struct mqtthdr *) (buf->msg_base + siz);
+		siz += sizeof(struct mqtthdr);
+		v = (mqtt_v_t*) (buf->msg_base + siz);
+		siz += sizeof(mqtt_v_t);
+	}
+
+	/* fixed header */
+	MQTTHDR_MSGINIT(hdr);
+	hdr->mqtt_msg.type = MQTT_TYPE_UNSUBACK;
+	*hdr->mqtt_len = sizeof(mqtt_v_t);
+
+	/* MessageID */
+	v->val = htons(msgID);
+
 	return siz;
 }