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/MQTTSubscribeServer.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 subscribe 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 requestedQoSs - array of requested QoS
jksoft 24:6ba1245bf049 31 * @param buf the raw buffer data, of the correct length determined by the remaining length field
jksoft 24:6ba1245bf049 32 * @param buflen the length in bytes of the data in the supplied buffer
jksoft 24:6ba1245bf049 33 * @return the length of the serialized data. <= 0 indicates error
jksoft 24:6ba1245bf049 34 */
jksoft 24:6ba1245bf049 35 int MQTTDeserialize_subscribe(unsigned char* dup, unsigned short* packetid, int maxcount, int* count, MQTTString topicFilters[],
jksoft 24:6ba1245bf049 36 int requestedQoSs[], unsigned char* buf, int buflen)
jksoft 24:6ba1245bf049 37 {
jksoft 24:6ba1245bf049 38 MQTTHeader header = {0};
jksoft 24:6ba1245bf049 39 unsigned char* curdata = buf;
jksoft 24:6ba1245bf049 40 unsigned char* enddata = NULL;
jksoft 24:6ba1245bf049 41 int rc = -1;
jksoft 24:6ba1245bf049 42 int mylen = 0;
jksoft 24:6ba1245bf049 43
jksoft 24:6ba1245bf049 44 FUNC_ENTRY;
jksoft 24:6ba1245bf049 45 header.byte = readChar(&curdata);
jksoft 24:6ba1245bf049 46 if (header.bits.type != SUBSCRIBE)
jksoft 24:6ba1245bf049 47 goto exit;
jksoft 24:6ba1245bf049 48 *dup = header.bits.dup;
jksoft 24:6ba1245bf049 49
jksoft 24:6ba1245bf049 50 curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */
jksoft 24:6ba1245bf049 51 enddata = curdata + mylen;
jksoft 24:6ba1245bf049 52
jksoft 24:6ba1245bf049 53 *packetid = readInt(&curdata);
jksoft 24:6ba1245bf049 54
jksoft 24:6ba1245bf049 55 *count = 0;
jksoft 24:6ba1245bf049 56 while (curdata < enddata)
jksoft 24:6ba1245bf049 57 {
jksoft 24:6ba1245bf049 58 if (!readMQTTLenString(&topicFilters[*count], &curdata, enddata))
jksoft 24:6ba1245bf049 59 goto exit;
jksoft 24:6ba1245bf049 60 if (curdata >= enddata) /* do we have enough data to read the req_qos version byte? */
jksoft 24:6ba1245bf049 61 goto exit;
jksoft 24:6ba1245bf049 62 requestedQoSs[*count] = readChar(&curdata);
jksoft 24:6ba1245bf049 63 (*count)++;
jksoft 24:6ba1245bf049 64 }
jksoft 24:6ba1245bf049 65
jksoft 24:6ba1245bf049 66 rc = 1;
jksoft 24:6ba1245bf049 67 exit:
jksoft 24:6ba1245bf049 68 FUNC_EXIT_RC(rc);
jksoft 24:6ba1245bf049 69 return rc;
jksoft 24:6ba1245bf049 70 }
jksoft 24:6ba1245bf049 71
jksoft 24:6ba1245bf049 72
jksoft 24:6ba1245bf049 73 /**
jksoft 24:6ba1245bf049 74 * Serializes the supplied suback data into the supplied buffer, ready for sending
jksoft 24:6ba1245bf049 75 * @param buf the buffer into which the packet will be serialized
jksoft 24:6ba1245bf049 76 * @param buflen the length in bytes of the supplied buffer
jksoft 24:6ba1245bf049 77 * @param packetid integer - the MQTT packet identifier
jksoft 24:6ba1245bf049 78 * @param count - number of members in the grantedQoSs array
jksoft 24:6ba1245bf049 79 * @param grantedQoSs - array of granted QoS
jksoft 24:6ba1245bf049 80 * @return the length of the serialized data. <= 0 indicates error
jksoft 24:6ba1245bf049 81 */
jksoft 24:6ba1245bf049 82 int MQTTSerialize_suback(unsigned char* buf, int buflen, unsigned short packetid, int count, int* grantedQoSs)
jksoft 24:6ba1245bf049 83 {
jksoft 24:6ba1245bf049 84 MQTTHeader header = {0};
jksoft 24:6ba1245bf049 85 int rc = -1;
jksoft 24:6ba1245bf049 86 unsigned char *ptr = buf;
jksoft 24:6ba1245bf049 87 int i;
jksoft 24:6ba1245bf049 88
jksoft 24:6ba1245bf049 89 FUNC_ENTRY;
jksoft 24:6ba1245bf049 90 if (buflen < 2 + count)
jksoft 24:6ba1245bf049 91 {
jksoft 24:6ba1245bf049 92 rc = MQTTPACKET_BUFFER_TOO_SHORT;
jksoft 24:6ba1245bf049 93 goto exit;
jksoft 24:6ba1245bf049 94 }
jksoft 24:6ba1245bf049 95 header.byte = 0;
jksoft 24:6ba1245bf049 96 header.bits.type = SUBACK;
jksoft 24:6ba1245bf049 97 writeChar(&ptr, header.byte); /* write header */
jksoft 24:6ba1245bf049 98
jksoft 24:6ba1245bf049 99 ptr += MQTTPacket_encode(ptr, 2 + count); /* write remaining length */
jksoft 24:6ba1245bf049 100
jksoft 24:6ba1245bf049 101 writeInt(&ptr, packetid);
jksoft 24:6ba1245bf049 102
jksoft 24:6ba1245bf049 103 for (i = 0; i < count; ++i)
jksoft 24:6ba1245bf049 104 writeChar(&ptr, grantedQoSs[i]);
jksoft 24:6ba1245bf049 105
jksoft 24:6ba1245bf049 106 rc = ptr - buf;
jksoft 24:6ba1245bf049 107 exit:
jksoft 24:6ba1245bf049 108 FUNC_EXIT_RC(rc);
jksoft 24:6ba1245bf049 109 return rc;
jksoft 24:6ba1245bf049 110 }
jksoft 24:6ba1245bf049 111
jksoft 24:6ba1245bf049 112