Add toolchain and mbtk source
Change-Id: Ie12546301367ea59240bf23d5e184ad7e36e40b3
diff --git a/mbtk/mbtk_mqtt/MQTTPacket/MQTTUnsubscribeClient.c b/mbtk/mbtk_mqtt/MQTTPacket/MQTTUnsubscribeClient.c
new file mode 100755
index 0000000..0f8db7b
--- /dev/null
+++ b/mbtk/mbtk_mqtt/MQTTPacket/MQTTUnsubscribeClient.c
@@ -0,0 +1,106 @@
+/*******************************************************************************
+ * Copyright (c) 2014 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ * Ian Craggs - initial API and implementation and/or initial documentation
+ *******************************************************************************/
+
+#include "MQTTPacket.h"
+#include "StackTrace.h"
+
+#include <string.h>
+
+/**
+ * Determines the length of the MQTT unsubscribe packet that would be produced using the supplied parameters
+ * @param count the number of topic filter strings in topicFilters
+ * @param topicFilters the array of topic filter strings to be used in the publish
+ * @return the length of buffer needed to contain the serialized version of the packet
+ */
+int MQTTSerialize_unsubscribeLength(int count, MQTTString topicFilters[])
+{
+ int i;
+ int len = 2; /* packetid */
+
+ for (i = 0; i < count; ++i)
+ len += 2 + MQTTstrlen(topicFilters[i]); /* length + topic*/
+ return len;
+}
+
+
+/**
+ * Serializes the supplied unsubscribe data into the supplied buffer, ready for sending
+ * @param buf the raw buffer data, of the correct length determined by the remaining length field
+ * @param buflen the length in bytes of the data in the supplied buffer
+ * @param dup integer - the MQTT dup flag
+ * @param packetid integer - the MQTT packet identifier
+ * @param count - number of members in the topicFilters array
+ * @param topicFilters - array of topic filter names
+ * @return the length of the serialized data. <= 0 indicates error
+ */
+int MQTTSerialize_unsubscribe(unsigned char* buf, int buflen, unsigned char dup, unsigned short packetid,
+ int count, MQTTString topicFilters[])
+{
+ unsigned char *ptr = buf;
+ MQTTHeader header = {0};
+ int rem_len = 0;
+ int rc = -1;
+ int i = 0;
+
+ FUNC_ENTRY;
+ if (MQTTPacket_len(rem_len = MQTTSerialize_unsubscribeLength(count, topicFilters)) > buflen)
+ {
+ rc = MQTTPACKET_BUFFER_TOO_SHORT;
+ goto exit;
+ }
+
+ header.byte = 0;
+ header.bits.type = UNSUBSCRIBE;
+ header.bits.dup = dup;
+ header.bits.qos = 1;
+ writeChar(&ptr, header.byte); /* write header */
+
+ ptr += MQTTPacket_encode(ptr, rem_len); /* write remaining length */;
+
+ writeInt(&ptr, packetid);
+
+ for (i = 0; i < count; ++i)
+ writeMQTTString(&ptr, topicFilters[i]);
+
+ rc = ptr - buf;
+exit:
+ FUNC_EXIT_RC(rc);
+ return rc;
+}
+
+
+/**
+ * Deserializes the supplied (wire) buffer into unsuback data
+ * @param packetid returned integer - the MQTT packet identifier
+ * @param buf the raw buffer data, of the correct length determined by the remaining length field
+ * @param buflen the length in bytes of the data in the supplied buffer
+ * @return error code. 1 is success, 0 is failure
+ */
+int MQTTDeserialize_unsuback(unsigned short* packetid, unsigned char* buf, int buflen)
+{
+ unsigned char type = 0;
+ unsigned char dup = 0;
+ int rc = 0;
+
+ FUNC_ENTRY;
+ rc = MQTTDeserialize_ack(&type, &dup, packetid, buf, buflen);
+ if (type == UNSUBACK)
+ rc = 1;
+ FUNC_EXIT_RC(rc);
+ return rc;
+}
+
+