MQTTUnsubscribeClient.c File Reference

#include "MQTTPacket.h"
#include "StackTrace.h"
#include <string.h>

Functions
int	MQTTDeserialize_unsuback (unsigned short *packetid, unsigned char *buf, int buflen)
	Deserializes the supplied (wire) buffer into unsuback data. More...
int	MQTTSerialize_unsubscribe (unsigned char *buf, int buflen, unsigned char dup, unsigned short packetid, int count, MQTTString topicFilters[])
	Serializes the supplied unsubscribe data into the supplied buffer, ready for sending. More...
int	MQTTSerialize_unsubscribeLength (int count, MQTTString topicFilters[])
	Determines the length of the MQTT unsubscribe packet that would be produced using the supplied parameters. More...

int MQTTDeserialize_unsuback	(	unsigned short *	packetid,
		unsigned char *	buf,
		int	buflen
	)

Deserializes the supplied (wire) buffer into unsuback data.

Parameters

packetid	returned integer - the MQTT packet identifier
buf	the raw buffer data, of the correct length determined by the remaining length field
buflen	the length in bytes of the data in the supplied buffer

Returns

error code. 1 is success, 0 is failure

References FUNC_ENTRY, FUNC_EXIT_RC, MQTTDeserialize_ack(), and UNSUBACK.

Referenced by MQTTFormat_toClientString(), and MQTTUnsubscribe().

int MQTTSerialize_unsubscribe	(	unsigned char *	buf,
		int	buflen,
		unsigned char	dup,
		unsigned short	packetid,
		int	count,
		MQTTString	topicFilters[]
	)

Serializes the supplied unsubscribe data into the supplied buffer, ready for sending.

Parameters

buf	the raw buffer data, of the correct length determined by the remaining length field
buflen	the length in bytes of the data in the supplied buffer
dup	integer - the MQTT dup flag
packetid	integer - the MQTT packet identifier
count	- number of members in the topicFilters array
topicFilters	- array of topic filter names

Returns

the length of the serialized data. <= 0 indicates error

References MQTTHeader::bits, MQTTHeader::byte, count, MQTTHeader::dup, FUNC_ENTRY, FUNC_EXIT_RC, header, i, MQTTPACKET_BUFFER_TOO_SHORT, MQTTPacket_encode(), MQTTPacket_len(), MQTTSerialize_unsubscribeLength(), ptr, MQTTHeader::qos, MQTTHeader::type, UNSUBSCRIBE, writeChar(), writeInt(), and writeMQTTString().

Referenced by MQTTUnsubscribe().

int MQTTSerialize_unsubscribeLength	(	int	count,
		MQTTString	topicFilters[]
	)

Determines the length of the MQTT unsubscribe packet that would be produced using the supplied parameters.

Parameters

count	the number of topic filter strings in topicFilters
topicFilters	the array of topic filter strings to be used in the publish

Returns

the length of buffer needed to contain the serialized version of the packet

References count, i, and MQTTstrlen().

Referenced by MQTTSerialize_unsubscribe().