MQTTPacket library (clone of https://os.mbed.com/teams/mqtt/code/MQTTPacket/)
MQTTUnsubscribeServer.c@14:c2052aee81de, 2014-08-01 (annotated)
- Committer:
- Ian Craggs
- Date:
- Fri Aug 01 15:34:04 2014 +0100
- Revision:
- 14:c2052aee81de
- Parent:
- 0:7734401cc1b4
- Child:
- 16:d0b3886ada32
Change C types to better fit MQTT types, and match MQTT-SN library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
icraggs | 0:7734401cc1b4 | 1 | /******************************************************************************* |
icraggs | 0:7734401cc1b4 | 2 | * Copyright (c) 2014 IBM Corp. |
icraggs | 0:7734401cc1b4 | 3 | * |
icraggs | 0:7734401cc1b4 | 4 | * All rights reserved. This program and the accompanying materials |
icraggs | 0:7734401cc1b4 | 5 | * are made available under the terms of the Eclipse Public License v1.0 |
icraggs | 0:7734401cc1b4 | 6 | * and Eclipse Distribution License v1.0 which accompany this distribution. |
icraggs | 0:7734401cc1b4 | 7 | * |
icraggs | 0:7734401cc1b4 | 8 | * The Eclipse Public License is available at |
icraggs | 0:7734401cc1b4 | 9 | * http://www.eclipse.org/legal/epl-v10.html |
icraggs | 0:7734401cc1b4 | 10 | * and the Eclipse Distribution License is available at |
icraggs | 0:7734401cc1b4 | 11 | * http://www.eclipse.org/org/documents/edl-v10.php. |
icraggs | 0:7734401cc1b4 | 12 | * |
icraggs | 0:7734401cc1b4 | 13 | * Contributors: |
icraggs | 0:7734401cc1b4 | 14 | * Ian Craggs - initial API and implementation and/or initial documentation |
icraggs | 0:7734401cc1b4 | 15 | *******************************************************************************/ |
icraggs | 0:7734401cc1b4 | 16 | |
icraggs | 0:7734401cc1b4 | 17 | #include "MQTTPacket.h" |
icraggs | 0:7734401cc1b4 | 18 | #include "StackTrace.h" |
icraggs | 0:7734401cc1b4 | 19 | |
icraggs | 0:7734401cc1b4 | 20 | #include <string.h> |
icraggs | 0:7734401cc1b4 | 21 | |
icraggs | 0:7734401cc1b4 | 22 | |
icraggs | 0:7734401cc1b4 | 23 | /** |
icraggs | 0:7734401cc1b4 | 24 | * Deserializes the supplied (wire) buffer into unsubscribe data |
icraggs | 0:7734401cc1b4 | 25 | * @param dup integer returned - the MQTT dup flag |
icraggs | 0:7734401cc1b4 | 26 | * @param packetid integer returned - the MQTT packet identifier |
icraggs | 0:7734401cc1b4 | 27 | * @param maxcount - the maximum number of members allowed in the topicFilters and requestedQoSs arrays |
icraggs | 0:7734401cc1b4 | 28 | * @param count - number of members in the topicFilters and requestedQoSs arrays |
icraggs | 0:7734401cc1b4 | 29 | * @param topicFilters - array of topic filter names |
icraggs | 0:7734401cc1b4 | 30 | * @param buf the raw buffer data, of the correct length determined by the remaining length field |
icraggs | 0:7734401cc1b4 | 31 | * @param buflen the length in bytes of the data in the supplied buffer |
icraggs | 0:7734401cc1b4 | 32 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 0:7734401cc1b4 | 33 | */ |
Ian Craggs |
14:c2052aee81de | 34 | int MQTTDeserialize_unsubscribe(unsigned char* dup, unsigned short* packetid, int maxcount, int* count, MQTTString topicFilters[], |
Ian Craggs |
14:c2052aee81de | 35 | unsigned char* buf, int len) |
icraggs | 0:7734401cc1b4 | 36 | { |
icraggs | 0:7734401cc1b4 | 37 | MQTTHeader header; |
Ian Craggs |
14:c2052aee81de | 38 | unsigned char* curdata = buf; |
Ian Craggs |
14:c2052aee81de | 39 | unsigned char* enddata = NULL; |
icraggs | 0:7734401cc1b4 | 40 | int rc = 0; |
icraggs | 0:7734401cc1b4 | 41 | int mylen = 0; |
icraggs | 0:7734401cc1b4 | 42 | |
icraggs | 0:7734401cc1b4 | 43 | FUNC_ENTRY; |
icraggs | 0:7734401cc1b4 | 44 | header.byte = readChar(&curdata); |
icraggs | 0:7734401cc1b4 | 45 | *dup = header.bits.dup; |
icraggs | 0:7734401cc1b4 | 46 | |
icraggs | 0:7734401cc1b4 | 47 | curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */ |
icraggs | 0:7734401cc1b4 | 48 | enddata = curdata + mylen; |
icraggs | 0:7734401cc1b4 | 49 | |
icraggs | 0:7734401cc1b4 | 50 | *packetid = readInt(&curdata); |
icraggs | 0:7734401cc1b4 | 51 | |
icraggs | 0:7734401cc1b4 | 52 | *count = 0; |
icraggs | 0:7734401cc1b4 | 53 | while (curdata < enddata) |
icraggs | 0:7734401cc1b4 | 54 | { |
icraggs | 0:7734401cc1b4 | 55 | if (!readMQTTLenString(&topicFilters[*count], &curdata, enddata)) |
icraggs | 0:7734401cc1b4 | 56 | goto exit; |
icraggs | 0:7734401cc1b4 | 57 | (*count)++; |
icraggs | 0:7734401cc1b4 | 58 | } |
icraggs | 0:7734401cc1b4 | 59 | |
icraggs | 0:7734401cc1b4 | 60 | rc = 1; |
icraggs | 0:7734401cc1b4 | 61 | exit: |
icraggs | 0:7734401cc1b4 | 62 | FUNC_EXIT_RC(rc); |
icraggs | 0:7734401cc1b4 | 63 | return rc; |
icraggs | 0:7734401cc1b4 | 64 | } |
icraggs | 0:7734401cc1b4 | 65 | |
icraggs | 0:7734401cc1b4 | 66 | |
icraggs | 0:7734401cc1b4 | 67 | /** |
icraggs | 0:7734401cc1b4 | 68 | * Serializes the supplied unsuback data into the supplied buffer, ready for sending |
icraggs | 0:7734401cc1b4 | 69 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:7734401cc1b4 | 70 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:7734401cc1b4 | 71 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:7734401cc1b4 | 72 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 0:7734401cc1b4 | 73 | */ |
Ian Craggs |
14:c2052aee81de | 74 | int MQTTSerialize_unsuback(unsigned char* buf, int buflen, unsigned short packetid) |
icraggs | 0:7734401cc1b4 | 75 | { |
icraggs | 0:7734401cc1b4 | 76 | MQTTHeader header; |
icraggs | 0:7734401cc1b4 | 77 | int rc = 0; |
Ian Craggs |
14:c2052aee81de | 78 | unsigned char *ptr = buf; |
icraggs | 0:7734401cc1b4 | 79 | |
icraggs | 0:7734401cc1b4 | 80 | FUNC_ENTRY; |
icraggs | 0:7734401cc1b4 | 81 | if (buflen < 2) |
icraggs | 0:7734401cc1b4 | 82 | { |
icraggs | 0:7734401cc1b4 | 83 | rc = MQTTPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:7734401cc1b4 | 84 | goto exit; |
icraggs | 0:7734401cc1b4 | 85 | } |
icraggs | 0:7734401cc1b4 | 86 | header.byte = 0; |
icraggs | 0:7734401cc1b4 | 87 | header.bits.type = UNSUBACK; |
icraggs | 0:7734401cc1b4 | 88 | writeChar(&ptr, header.byte); /* write header */ |
icraggs | 0:7734401cc1b4 | 89 | |
icraggs | 0:7734401cc1b4 | 90 | ptr += MQTTPacket_encode(ptr, 2); /* write remaining length */ |
icraggs | 0:7734401cc1b4 | 91 | |
icraggs | 0:7734401cc1b4 | 92 | writeInt(&ptr, packetid); |
icraggs | 0:7734401cc1b4 | 93 | |
icraggs | 0:7734401cc1b4 | 94 | rc = ptr - buf; |
icraggs | 0:7734401cc1b4 | 95 | exit: |
icraggs | 0:7734401cc1b4 | 96 | FUNC_EXIT_RC(rc); |
icraggs | 0:7734401cc1b4 | 97 | return rc; |
icraggs | 0:7734401cc1b4 | 98 | } |
icraggs | 0:7734401cc1b4 | 99 | |
icraggs | 0:7734401cc1b4 | 100 |