Junichi Katsu / Mbed OS mbed-os-example-milkcocoa

mbed OS5に対応したMilkcocoaライブラリのテストバージョンです。

Fork of mbed-os-example-mbed5-blinky by mbed-os-examples

Milkcocoa/MQTT/MQTTPacket/MQTTUnsubscribeServer.c@24:6ba1245bf049, 2017-01-24 (annotated)

Committer:
jksoft
Date:
Tue Jan 24 13:41:36 2017 +0000
Revision:
24:6ba1245bf049
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
jksoft 24:6ba1245bf049 1 /*******************************************************************************
jksoft 24:6ba1245bf049 2 * Copyright (c) 2014 IBM Corp.
jksoft 24:6ba1245bf049 3 *
jksoft 24:6ba1245bf049 4 * All rights reserved. This program and the accompanying materials
jksoft 24:6ba1245bf049 5 * are made available under the terms of the Eclipse Public License v1.0
jksoft 24:6ba1245bf049 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
jksoft 24:6ba1245bf049 7 *
jksoft 24:6ba1245bf049 8 * The Eclipse Public License is available at
jksoft 24:6ba1245bf049 9 * http://www.eclipse.org/legal/epl-v10.html
jksoft 24:6ba1245bf049 10 * and the Eclipse Distribution License is available at
jksoft 24:6ba1245bf049 11 * http://www.eclipse.org/org/documents/edl-v10.php.
jksoft 24:6ba1245bf049 12 *
jksoft 24:6ba1245bf049 13 * Contributors:
jksoft 24:6ba1245bf049 14 * Ian Craggs - initial API and implementation and/or initial documentation
jksoft 24:6ba1245bf049 15 *******************************************************************************/
jksoft 24:6ba1245bf049 16
jksoft 24:6ba1245bf049 17 #include "MQTTPacket.h"
jksoft 24:6ba1245bf049 18 #include "StackTrace.h"
jksoft 24:6ba1245bf049 19
jksoft 24:6ba1245bf049 20 #include <string.h>
jksoft 24:6ba1245bf049 21
jksoft 24:6ba1245bf049 22
jksoft 24:6ba1245bf049 23 /**
jksoft 24:6ba1245bf049 24 * Deserializes the supplied (wire) buffer into unsubscribe data
jksoft 24:6ba1245bf049 25 * @param dup integer returned - the MQTT dup flag
jksoft 24:6ba1245bf049 26 * @param packetid integer returned - the MQTT packet identifier
jksoft 24:6ba1245bf049 27 * @param maxcount - the maximum number of members allowed in the topicFilters and requestedQoSs arrays
jksoft 24:6ba1245bf049 28 * @param count - number of members in the topicFilters and requestedQoSs arrays
jksoft 24:6ba1245bf049 29 * @param topicFilters - array of topic filter names
jksoft 24:6ba1245bf049 30 * @param buf the raw buffer data, of the correct length determined by the remaining length field
jksoft 24:6ba1245bf049 31 * @param buflen the length in bytes of the data in the supplied buffer
jksoft 24:6ba1245bf049 32 * @return the length of the serialized data. <= 0 indicates error
jksoft 24:6ba1245bf049 33 */
jksoft 24:6ba1245bf049 34 int MQTTDeserialize_unsubscribe(unsigned char* dup, unsigned short* packetid, int maxcount, int* count, MQTTString topicFilters[],
jksoft 24:6ba1245bf049 35 unsigned char* buf, int len)
jksoft 24:6ba1245bf049 36 {
jksoft 24:6ba1245bf049 37 MQTTHeader header = {0};
jksoft 24:6ba1245bf049 38 unsigned char* curdata = buf;
jksoft 24:6ba1245bf049 39 unsigned char* enddata = NULL;
jksoft 24:6ba1245bf049 40 int rc = 0;
jksoft 24:6ba1245bf049 41 int mylen = 0;
jksoft 24:6ba1245bf049 42
jksoft 24:6ba1245bf049 43 FUNC_ENTRY;
jksoft 24:6ba1245bf049 44 header.byte = readChar(&curdata);
jksoft 24:6ba1245bf049 45 if (header.bits.type != UNSUBSCRIBE)
jksoft 24:6ba1245bf049 46 goto exit;
jksoft 24:6ba1245bf049 47 *dup = header.bits.dup;
jksoft 24:6ba1245bf049 48
jksoft 24:6ba1245bf049 49 curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */
jksoft 24:6ba1245bf049 50 enddata = curdata + mylen;
jksoft 24:6ba1245bf049 51
jksoft 24:6ba1245bf049 52 *packetid = readInt(&curdata);
jksoft 24:6ba1245bf049 53
jksoft 24:6ba1245bf049 54 *count = 0;
jksoft 24:6ba1245bf049 55 while (curdata < enddata)
jksoft 24:6ba1245bf049 56 {
jksoft 24:6ba1245bf049 57 if (!readMQTTLenString(&topicFilters[*count], &curdata, enddata))
jksoft 24:6ba1245bf049 58 goto exit;
jksoft 24:6ba1245bf049 59 (*count)++;
jksoft 24:6ba1245bf049 60 }
jksoft 24:6ba1245bf049 61
jksoft 24:6ba1245bf049 62 rc = 1;
jksoft 24:6ba1245bf049 63 exit:
jksoft 24:6ba1245bf049 64 FUNC_EXIT_RC(rc);
jksoft 24:6ba1245bf049 65 return rc;
jksoft 24:6ba1245bf049 66 }
jksoft 24:6ba1245bf049 67
jksoft 24:6ba1245bf049 68
jksoft 24:6ba1245bf049 69 /**
jksoft 24:6ba1245bf049 70 * Serializes the supplied unsuback data into the supplied buffer, ready for sending
jksoft 24:6ba1245bf049 71 * @param buf the buffer into which the packet will be serialized
jksoft 24:6ba1245bf049 72 * @param buflen the length in bytes of the supplied buffer
jksoft 24:6ba1245bf049 73 * @param packetid integer - the MQTT packet identifier
jksoft 24:6ba1245bf049 74 * @return the length of the serialized data. <= 0 indicates error
jksoft 24:6ba1245bf049 75 */
jksoft 24:6ba1245bf049 76 int MQTTSerialize_unsuback(unsigned char* buf, int buflen, unsigned short packetid)
jksoft 24:6ba1245bf049 77 {
jksoft 24:6ba1245bf049 78 MQTTHeader header = {0};
jksoft 24:6ba1245bf049 79 int rc = 0;
jksoft 24:6ba1245bf049 80 unsigned char *ptr = buf;
jksoft 24:6ba1245bf049 81
jksoft 24:6ba1245bf049 82 FUNC_ENTRY;
jksoft 24:6ba1245bf049 83 if (buflen < 2)
jksoft 24:6ba1245bf049 84 {
jksoft 24:6ba1245bf049 85 rc = MQTTPACKET_BUFFER_TOO_SHORT;
jksoft 24:6ba1245bf049 86 goto exit;
jksoft 24:6ba1245bf049 87 }
jksoft 24:6ba1245bf049 88 header.byte = 0;
jksoft 24:6ba1245bf049 89 header.bits.type = UNSUBACK;
jksoft 24:6ba1245bf049 90 writeChar(&ptr, header.byte); /* write header */
jksoft 24:6ba1245bf049 91
jksoft 24:6ba1245bf049 92 ptr += MQTTPacket_encode(ptr, 2); /* write remaining length */
jksoft 24:6ba1245bf049 93
jksoft 24:6ba1245bf049 94 writeInt(&ptr, packetid);
jksoft 24:6ba1245bf049 95
jksoft 24:6ba1245bf049 96 rc = ptr - buf;
jksoft 24:6ba1245bf049 97 exit:
jksoft 24:6ba1245bf049 98 FUNC_EXIT_RC(rc);
jksoft 24:6ba1245bf049 99 return rc;
jksoft 24:6ba1245bf049 100 }
jksoft 24:6ba1245bf049 101
jksoft 24:6ba1245bf049 102