You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*
|
|
* 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>
|
|
|
|
/**
|
|
* Deserializes the supplied (wire) buffer into unsubscribe data
|
|
* @param dup integer returned - the MQTT dup flag
|
|
* @param packetid integer returned - the MQTT packet identifier
|
|
* @param maxcount - the maximum number of members allowed in the topicFilters and requestedQoSs arrays
|
|
* @param count - number of members in the topicFilters and requestedQoSs arrays
|
|
* @param topicFilters - array of topic filter names
|
|
* @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 the length of the serialized data. <= 0 indicates error
|
|
*/
|
|
int32_t MQTTDeserialize_unsubscribe(uint8_t* dup, uint16_t* packetid, int32_t maxcount, int32_t* count, MQTTString topicFilters[],
|
|
uint8_t* buf, int32_t len)
|
|
{
|
|
MQTTHeader header = {0};
|
|
uint8_t* curdata = buf;
|
|
uint8_t* enddata = NULL;
|
|
int32_t rc = 0;
|
|
int32_t mylen = 0;
|
|
|
|
FUNC_ENTRY;
|
|
|
|
header.byte = readChar(&curdata);
|
|
if (header.bits.type != UNSUBSCRIBE)
|
|
goto exit;
|
|
*dup = header.bits.dup;
|
|
|
|
curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */
|
|
enddata = curdata + mylen;
|
|
|
|
*packetid = readInt(&curdata);
|
|
*count = 0;
|
|
|
|
while (curdata < enddata)
|
|
{
|
|
if (!readMQTTLenString(&topicFilters[*count], &curdata, enddata))
|
|
goto exit;
|
|
(*count)++;
|
|
}
|
|
|
|
rc = 1;
|
|
exit:
|
|
FUNC_EXIT_RC(rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* Serializes the supplied unsuback data into the supplied buffer, ready for sending
|
|
* @param buf the buffer into which the packet will be serialized
|
|
* @param buflen the length in bytes of the supplied buffer
|
|
* @param packetid integer - the MQTT packet identifier
|
|
* @return the length of the serialized data. <= 0 indicates error
|
|
*/
|
|
int32_t MQTTSerialize_unsuback(uint8_t* buf, int32_t buflen, uint16_t packetid)
|
|
{
|
|
MQTTHeader header = {0};
|
|
int32_t rc = 0;
|
|
uint8_t *ptr = buf;
|
|
|
|
FUNC_ENTRY;
|
|
|
|
if (buflen < 2)
|
|
{
|
|
rc = MQTTPACKET_BUFFER_TOO_SHORT;
|
|
goto exit;
|
|
}
|
|
|
|
header.byte = 0;
|
|
header.bits.type = UNSUBACK;
|
|
writeChar(&ptr, header.byte); /* write header */
|
|
ptr += MQTTPacket_encode(ptr, 2); /* write remaining length */
|
|
writeInt(&ptr, packetid);
|
|
|
|
rc = ptr - buf;
|
|
exit:
|
|
FUNC_EXIT_RC(rc);
|
|
return rc;
|
|
}
|
|
|
|
|