Junichi Katsu / Milkcocoa-os

【mbed OS5対応バージョン】データの保存、更新、取得ができるWebサービス「milkcocoa」に接続し、データのプッシュ、送信、取得ができるライブラリです。 https://mlkcca.com/

Dependents:   mbed-os-example-wifi-milkcocoa MilkcocoaOsSample_Eth MilkcocoaOsSample_ESP8266 MilkcocoaOsSample_Eth_DigitalIn

MQTT/MQTTPacket/MQTTUnsubscribeClient.c@0:0a2f634d3324, 2017-02-09 (annotated)

Committer:
jksoft
Date:
Thu Feb 09 07:26:57 2017 +0000
Revision:
0:0a2f634d3324
??

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jksoft 0:0a2f634d3324 1 /*******************************************************************************
jksoft 0:0a2f634d3324 2 * Copyright (c) 2014 IBM Corp.
jksoft 0:0a2f634d3324 3 *
jksoft 0:0a2f634d3324 4 * All rights reserved. This program and the accompanying materials
jksoft 0:0a2f634d3324 5 * are made available under the terms of the Eclipse Public License v1.0
jksoft 0:0a2f634d3324 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
jksoft 0:0a2f634d3324 7 *
jksoft 0:0a2f634d3324 8 * The Eclipse Public License is available at
jksoft 0:0a2f634d3324 9 * http://www.eclipse.org/legal/epl-v10.html
jksoft 0:0a2f634d3324 10 * and the Eclipse Distribution License is available at
jksoft 0:0a2f634d3324 11 * http://www.eclipse.org/org/documents/edl-v10.php.
jksoft 0:0a2f634d3324 12 *
jksoft 0:0a2f634d3324 13 * Contributors:
jksoft 0:0a2f634d3324 14 * Ian Craggs - initial API and implementation and/or initial documentation
jksoft 0:0a2f634d3324 15 *******************************************************************************/
jksoft 0:0a2f634d3324 16
jksoft 0:0a2f634d3324 17 #include "MQTTPacket.h"
jksoft 0:0a2f634d3324 18 #include "StackTrace.h"
jksoft 0:0a2f634d3324 19
jksoft 0:0a2f634d3324 20 #include <string.h>
jksoft 0:0a2f634d3324 21
jksoft 0:0a2f634d3324 22 /**
jksoft 0:0a2f634d3324 23 * Determines the length of the MQTT unsubscribe packet that would be produced using the supplied parameters
jksoft 0:0a2f634d3324 24 * @param count the number of topic filter strings in topicFilters
jksoft 0:0a2f634d3324 25 * @param topicFilters the array of topic filter strings to be used in the publish
jksoft 0:0a2f634d3324 26 * @return the length of buffer needed to contain the serialized version of the packet
jksoft 0:0a2f634d3324 27 */
jksoft 0:0a2f634d3324 28 int MQTTSerialize_unsubscribeLength(int count, MQTTString topicFilters[])
jksoft 0:0a2f634d3324 29 {
jksoft 0:0a2f634d3324 30 int i;
jksoft 0:0a2f634d3324 31 int len = 2; /* packetid */
jksoft 0:0a2f634d3324 32
jksoft 0:0a2f634d3324 33 for (i = 0; i < count; ++i)
jksoft 0:0a2f634d3324 34 len += 2 + MQTTstrlen(topicFilters[i]); /* length + topic*/
jksoft 0:0a2f634d3324 35 return len;
jksoft 0:0a2f634d3324 36 }
jksoft 0:0a2f634d3324 37
jksoft 0:0a2f634d3324 38
jksoft 0:0a2f634d3324 39 /**
jksoft 0:0a2f634d3324 40 * Serializes the supplied unsubscribe data into the supplied buffer, ready for sending
jksoft 0:0a2f634d3324 41 * @param buf the raw buffer data, of the correct length determined by the remaining length field
jksoft 0:0a2f634d3324 42 * @param buflen the length in bytes of the data in the supplied buffer
jksoft 0:0a2f634d3324 43 * @param dup integer - the MQTT dup flag
jksoft 0:0a2f634d3324 44 * @param packetid integer - the MQTT packet identifier
jksoft 0:0a2f634d3324 45 * @param count - number of members in the topicFilters array
jksoft 0:0a2f634d3324 46 * @param topicFilters - array of topic filter names
jksoft 0:0a2f634d3324 47 * @return the length of the serialized data. <= 0 indicates error
jksoft 0:0a2f634d3324 48 */
jksoft 0:0a2f634d3324 49 int MQTTSerialize_unsubscribe(unsigned char* buf, int buflen, unsigned char dup, unsigned short packetid,
jksoft 0:0a2f634d3324 50 int count, MQTTString topicFilters[])
jksoft 0:0a2f634d3324 51 {
jksoft 0:0a2f634d3324 52 unsigned char *ptr = buf;
jksoft 0:0a2f634d3324 53 MQTTHeader header = {0};
jksoft 0:0a2f634d3324 54 int rem_len = 0;
jksoft 0:0a2f634d3324 55 int rc = -1;
jksoft 0:0a2f634d3324 56 int i = 0;
jksoft 0:0a2f634d3324 57
jksoft 0:0a2f634d3324 58 FUNC_ENTRY;
jksoft 0:0a2f634d3324 59 if (MQTTPacket_len(rem_len = MQTTSerialize_unsubscribeLength(count, topicFilters)) > buflen)
jksoft 0:0a2f634d3324 60 {
jksoft 0:0a2f634d3324 61 rc = MQTTPACKET_BUFFER_TOO_SHORT;
jksoft 0:0a2f634d3324 62 goto exit;
jksoft 0:0a2f634d3324 63 }
jksoft 0:0a2f634d3324 64
jksoft 0:0a2f634d3324 65 header.byte = 0;
jksoft 0:0a2f634d3324 66 header.bits.type = UNSUBSCRIBE;
jksoft 0:0a2f634d3324 67 header.bits.dup = dup;
jksoft 0:0a2f634d3324 68 header.bits.qos = 1;
jksoft 0:0a2f634d3324 69 writeChar(&ptr, header.byte); /* write header */
jksoft 0:0a2f634d3324 70
jksoft 0:0a2f634d3324 71 ptr += MQTTPacket_encode(ptr, rem_len); /* write remaining length */;
jksoft 0:0a2f634d3324 72
jksoft 0:0a2f634d3324 73 writeInt(&ptr, packetid);
jksoft 0:0a2f634d3324 74
jksoft 0:0a2f634d3324 75 for (i = 0; i < count; ++i)
jksoft 0:0a2f634d3324 76 writeMQTTString(&ptr, topicFilters[i]);
jksoft 0:0a2f634d3324 77
jksoft 0:0a2f634d3324 78 rc = ptr - buf;
jksoft 0:0a2f634d3324 79 exit:
jksoft 0:0a2f634d3324 80 FUNC_EXIT_RC(rc);
jksoft 0:0a2f634d3324 81 return rc;
jksoft 0:0a2f634d3324 82 }
jksoft 0:0a2f634d3324 83
jksoft 0:0a2f634d3324 84
jksoft 0:0a2f634d3324 85 /**
jksoft 0:0a2f634d3324 86 * Deserializes the supplied (wire) buffer into unsuback data
jksoft 0:0a2f634d3324 87 * @param packetid returned integer - the MQTT packet identifier
jksoft 0:0a2f634d3324 88 * @param buf the raw buffer data, of the correct length determined by the remaining length field
jksoft 0:0a2f634d3324 89 * @param buflen the length in bytes of the data in the supplied buffer
jksoft 0:0a2f634d3324 90 * @return error code. 1 is success, 0 is failure
jksoft 0:0a2f634d3324 91 */
jksoft 0:0a2f634d3324 92 int MQTTDeserialize_unsuback(unsigned short* packetid, unsigned char* buf, int buflen)
jksoft 0:0a2f634d3324 93 {
jksoft 0:0a2f634d3324 94 unsigned char type = 0;
jksoft 0:0a2f634d3324 95 unsigned char dup = 0;
jksoft 0:0a2f634d3324 96 int rc = 0;
jksoft 0:0a2f634d3324 97
jksoft 0:0a2f634d3324 98 FUNC_ENTRY;
jksoft 0:0a2f634d3324 99 rc = MQTTDeserialize_ack(&type, &dup, packetid, buf, buflen);
jksoft 0:0a2f634d3324 100 if (type == UNSUBACK)
jksoft 0:0a2f634d3324 101 rc = 1;
jksoft 0:0a2f634d3324 102 FUNC_EXIT_RC(rc);
jksoft 0:0a2f634d3324 103 return rc;
jksoft 0:0a2f634d3324 104 }
jksoft 0:0a2f634d3324 105
jksoft 0:0a2f634d3324 106