Vergil Cola / Mbed OS MQTTGatewayK64

Fork of my MQTTGateway

Dependencies:   mbed-http

MQTTSManager/MQTTPacket/MQTTUnsubscribeServer.c@0:f1d3878b8dd9, 2017-04-08 (annotated)

Committer:
vpcola
Date:
Sat Apr 08 14:45:51 2017 +0000
Revision:
0:f1d3878b8dd9
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vpcola 0:f1d3878b8dd9 1 /*******************************************************************************
vpcola 0:f1d3878b8dd9 2 * Copyright (c) 2014 IBM Corp.
vpcola 0:f1d3878b8dd9 3 *
vpcola 0:f1d3878b8dd9 4 * All rights reserved. This program and the accompanying materials
vpcola 0:f1d3878b8dd9 5 * are made available under the terms of the Eclipse Public License v1.0
vpcola 0:f1d3878b8dd9 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
vpcola 0:f1d3878b8dd9 7 *
vpcola 0:f1d3878b8dd9 8 * The Eclipse Public License is available at
vpcola 0:f1d3878b8dd9 9 * http://www.eclipse.org/legal/epl-v10.html
vpcola 0:f1d3878b8dd9 10 * and the Eclipse Distribution License is available at
vpcola 0:f1d3878b8dd9 11 * http://www.eclipse.org/org/documents/edl-v10.php.
vpcola 0:f1d3878b8dd9 12 *
vpcola 0:f1d3878b8dd9 13 * Contributors:
vpcola 0:f1d3878b8dd9 14 * Ian Craggs - initial API and implementation and/or initial documentation
vpcola 0:f1d3878b8dd9 15 *******************************************************************************/
vpcola 0:f1d3878b8dd9 16
vpcola 0:f1d3878b8dd9 17 #include "MQTTPacket.h"
vpcola 0:f1d3878b8dd9 18 #include "StackTrace.h"
vpcola 0:f1d3878b8dd9 19
vpcola 0:f1d3878b8dd9 20 #include <string.h>
vpcola 0:f1d3878b8dd9 21
vpcola 0:f1d3878b8dd9 22
vpcola 0:f1d3878b8dd9 23 /**
vpcola 0:f1d3878b8dd9 24 * Deserializes the supplied (wire) buffer into unsubscribe data
vpcola 0:f1d3878b8dd9 25 * @param dup integer returned - the MQTT dup flag
vpcola 0:f1d3878b8dd9 26 * @param packetid integer returned - the MQTT packet identifier
vpcola 0:f1d3878b8dd9 27 * @param maxcount - the maximum number of members allowed in the topicFilters and requestedQoSs arrays
vpcola 0:f1d3878b8dd9 28 * @param count - number of members in the topicFilters and requestedQoSs arrays
vpcola 0:f1d3878b8dd9 29 * @param topicFilters - array of topic filter names
vpcola 0:f1d3878b8dd9 30 * @param buf the raw buffer data, of the correct length determined by the remaining length field
vpcola 0:f1d3878b8dd9 31 * @param buflen the length in bytes of the data in the supplied buffer
vpcola 0:f1d3878b8dd9 32 * @return the length of the serialized data. <= 0 indicates error
vpcola 0:f1d3878b8dd9 33 */
vpcola 0:f1d3878b8dd9 34 int MQTTDeserialize_unsubscribe(unsigned char* dup, unsigned short* packetid, int maxcount, int* count, MQTTString topicFilters[],
vpcola 0:f1d3878b8dd9 35 unsigned char* buf, int len)
vpcola 0:f1d3878b8dd9 36 {
vpcola 0:f1d3878b8dd9 37 MQTTHeader header = {0};
vpcola 0:f1d3878b8dd9 38 unsigned char* curdata = buf;
vpcola 0:f1d3878b8dd9 39 unsigned char* enddata = NULL;
vpcola 0:f1d3878b8dd9 40 int rc = 0;
vpcola 0:f1d3878b8dd9 41 int mylen = 0;
vpcola 0:f1d3878b8dd9 42
vpcola 0:f1d3878b8dd9 43 FUNC_ENTRY;
vpcola 0:f1d3878b8dd9 44 header.byte = readChar(&curdata);
vpcola 0:f1d3878b8dd9 45 if (header.bits.type != UNSUBSCRIBE)
vpcola 0:f1d3878b8dd9 46 goto exit;
vpcola 0:f1d3878b8dd9 47 *dup = header.bits.dup;
vpcola 0:f1d3878b8dd9 48
vpcola 0:f1d3878b8dd9 49 curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */
vpcola 0:f1d3878b8dd9 50 enddata = curdata + mylen;
vpcola 0:f1d3878b8dd9 51
vpcola 0:f1d3878b8dd9 52 *packetid = readInt(&curdata);
vpcola 0:f1d3878b8dd9 53
vpcola 0:f1d3878b8dd9 54 *count = 0;
vpcola 0:f1d3878b8dd9 55 while (curdata < enddata)
vpcola 0:f1d3878b8dd9 56 {
vpcola 0:f1d3878b8dd9 57 if (!readMQTTLenString(&topicFilters[*count], &curdata, enddata))
vpcola 0:f1d3878b8dd9 58 goto exit;
vpcola 0:f1d3878b8dd9 59 (*count)++;
vpcola 0:f1d3878b8dd9 60 }
vpcola 0:f1d3878b8dd9 61
vpcola 0:f1d3878b8dd9 62 rc = 1;
vpcola 0:f1d3878b8dd9 63 exit:
vpcola 0:f1d3878b8dd9 64 FUNC_EXIT_RC(rc);
vpcola 0:f1d3878b8dd9 65 return rc;
vpcola 0:f1d3878b8dd9 66 }
vpcola 0:f1d3878b8dd9 67
vpcola 0:f1d3878b8dd9 68
vpcola 0:f1d3878b8dd9 69 /**
vpcola 0:f1d3878b8dd9 70 * Serializes the supplied unsuback data into the supplied buffer, ready for sending
vpcola 0:f1d3878b8dd9 71 * @param buf the buffer into which the packet will be serialized
vpcola 0:f1d3878b8dd9 72 * @param buflen the length in bytes of the supplied buffer
vpcola 0:f1d3878b8dd9 73 * @param packetid integer - the MQTT packet identifier
vpcola 0:f1d3878b8dd9 74 * @return the length of the serialized data. <= 0 indicates error
vpcola 0:f1d3878b8dd9 75 */
vpcola 0:f1d3878b8dd9 76 int MQTTSerialize_unsuback(unsigned char* buf, int buflen, unsigned short packetid)
vpcola 0:f1d3878b8dd9 77 {
vpcola 0:f1d3878b8dd9 78 MQTTHeader header = {0};
vpcola 0:f1d3878b8dd9 79 int rc = 0;
vpcola 0:f1d3878b8dd9 80 unsigned char *ptr = buf;
vpcola 0:f1d3878b8dd9 81
vpcola 0:f1d3878b8dd9 82 FUNC_ENTRY;
vpcola 0:f1d3878b8dd9 83 if (buflen < 2)
vpcola 0:f1d3878b8dd9 84 {
vpcola 0:f1d3878b8dd9 85 rc = MQTTPACKET_BUFFER_TOO_SHORT;
vpcola 0:f1d3878b8dd9 86 goto exit;
vpcola 0:f1d3878b8dd9 87 }
vpcola 0:f1d3878b8dd9 88 header.byte = 0;
vpcola 0:f1d3878b8dd9 89 header.bits.type = UNSUBACK;
vpcola 0:f1d3878b8dd9 90 writeChar(&ptr, header.byte); /* write header */
vpcola 0:f1d3878b8dd9 91
vpcola 0:f1d3878b8dd9 92 ptr += MQTTPacket_encode(ptr, 2); /* write remaining length */
vpcola 0:f1d3878b8dd9 93
vpcola 0:f1d3878b8dd9 94 writeInt(&ptr, packetid);
vpcola 0:f1d3878b8dd9 95
vpcola 0:f1d3878b8dd9 96 rc = ptr - buf;
vpcola 0:f1d3878b8dd9 97 exit:
vpcola 0:f1d3878b8dd9 98 FUNC_EXIT_RC(rc);
vpcola 0:f1d3878b8dd9 99 return rc;
vpcola 0:f1d3878b8dd9 100 }
vpcola 0:f1d3878b8dd9 101
vpcola 0:f1d3878b8dd9 102