My Modify MQTTPacket Packet size 100 -> 400
Fork of MQTTPacket by
MQTTDeserializePublish.c@0:7734401cc1b4, 2014-02-04 (annotated)
- Committer:
- icraggs
- Date:
- Tue Feb 04 22:31:32 2014 +0000
- Revision:
- 0:7734401cc1b4
- Child:
- 12:cd99ac9cb25a
First version of MQTT 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 "StackTrace.h" |
icraggs | 0:7734401cc1b4 | 18 | #include "MQTTPacket.h" |
icraggs | 0:7734401cc1b4 | 19 | #include <string.h> |
icraggs | 0:7734401cc1b4 | 20 | |
icraggs | 0:7734401cc1b4 | 21 | #define min(a, b) ((a < b) ? 1 : 0) |
icraggs | 0:7734401cc1b4 | 22 | |
icraggs | 0:7734401cc1b4 | 23 | /** |
icraggs | 0:7734401cc1b4 | 24 | * Deserializes the supplied (wire) buffer into publish data |
icraggs | 0:7734401cc1b4 | 25 | * @param dup returned integer - the MQTT dup flag |
icraggs | 0:7734401cc1b4 | 26 | * @param qos returned integer - the MQTT QoS value |
icraggs | 0:7734401cc1b4 | 27 | * @param retained returned integer - the MQTT retained flag |
icraggs | 0:7734401cc1b4 | 28 | * @param packetid returned integer - the MQTT packet identifier |
icraggs | 0:7734401cc1b4 | 29 | * @param topicName returned MQTTString - the MQTT topic in the publish |
icraggs | 0:7734401cc1b4 | 30 | * @param payload returned byte buffer - the MQTT publish payload |
icraggs | 0:7734401cc1b4 | 31 | * @param payloadlen returned integer - the length of the MQTT payload |
icraggs | 0:7734401cc1b4 | 32 | * @param buf the raw buffer data, of the correct length determined by the remaining length field |
icraggs | 0:7734401cc1b4 | 33 | * @param buflen the length in bytes of the data in the supplied buffer |
icraggs | 0:7734401cc1b4 | 34 | * @return error code. 1 is success |
icraggs | 0:7734401cc1b4 | 35 | */ |
icraggs | 0:7734401cc1b4 | 36 | int MQTTDeserialize_publish(int* dup, int* qos, int* retained, int* packetid, MQTTString* topicName, |
icraggs | 0:7734401cc1b4 | 37 | char** payload, int* payloadlen, char* buf, int buflen) |
icraggs | 0:7734401cc1b4 | 38 | { |
icraggs | 0:7734401cc1b4 | 39 | MQTTHeader header; |
icraggs | 0:7734401cc1b4 | 40 | char* curdata = buf; |
icraggs | 0:7734401cc1b4 | 41 | char* enddata = NULL; |
icraggs | 0:7734401cc1b4 | 42 | int rc = 0; |
icraggs | 0:7734401cc1b4 | 43 | int mylen = 0; |
icraggs | 0:7734401cc1b4 | 44 | |
icraggs | 0:7734401cc1b4 | 45 | FUNC_ENTRY; |
icraggs | 0:7734401cc1b4 | 46 | header.byte = readChar(&curdata); |
icraggs | 0:7734401cc1b4 | 47 | *dup = header.bits.dup; |
icraggs | 0:7734401cc1b4 | 48 | *qos = header.bits.qos; |
icraggs | 0:7734401cc1b4 | 49 | *retained = header.bits.retain; |
icraggs | 0:7734401cc1b4 | 50 | |
icraggs | 0:7734401cc1b4 | 51 | curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */ |
icraggs | 0:7734401cc1b4 | 52 | enddata = curdata + mylen; |
icraggs | 0:7734401cc1b4 | 53 | |
icraggs | 0:7734401cc1b4 | 54 | if (!readMQTTLenString(topicName, &curdata, enddata) || |
icraggs | 0:7734401cc1b4 | 55 | enddata - curdata < 0) /* do we have enough data to read the protocol version byte? */ |
icraggs | 0:7734401cc1b4 | 56 | goto exit; |
icraggs | 0:7734401cc1b4 | 57 | |
icraggs | 0:7734401cc1b4 | 58 | if (*qos > 0) |
icraggs | 0:7734401cc1b4 | 59 | *packetid = readInt(&curdata); |
icraggs | 0:7734401cc1b4 | 60 | |
icraggs | 0:7734401cc1b4 | 61 | *payloadlen = enddata - curdata; |
icraggs | 0:7734401cc1b4 | 62 | *payload = curdata; |
icraggs | 0:7734401cc1b4 | 63 | rc = 1; |
icraggs | 0:7734401cc1b4 | 64 | exit: |
icraggs | 0:7734401cc1b4 | 65 | FUNC_EXIT_RC(rc); |
icraggs | 0:7734401cc1b4 | 66 | return rc; |
icraggs | 0:7734401cc1b4 | 67 | } |
icraggs | 0:7734401cc1b4 | 68 | |
icraggs | 0:7734401cc1b4 | 69 | |
icraggs | 0:7734401cc1b4 | 70 | |
icraggs | 0:7734401cc1b4 | 71 | /** |
icraggs | 0:7734401cc1b4 | 72 | * Deserializes the supplied (wire) buffer into an ack |
icraggs | 0:7734401cc1b4 | 73 | * @param type returned integer - the MQTT packet type |
icraggs | 0:7734401cc1b4 | 74 | * @param dup returned integer - the MQTT dup flag |
icraggs | 0:7734401cc1b4 | 75 | * @param packetid returned integer - the MQTT packet identifier |
icraggs | 0:7734401cc1b4 | 76 | * @param buf the raw buffer data, of the correct length determined by the remaining length field |
icraggs | 0:7734401cc1b4 | 77 | * @param buflen the length in bytes of the data in the supplied buffer |
icraggs | 0:7734401cc1b4 | 78 | * @return error code. 1 is success, 0 is failure |
icraggs | 0:7734401cc1b4 | 79 | */ |
icraggs | 0:7734401cc1b4 | 80 | int MQTTDeserialize_ack(int* type, int* dup, int* packetid, char* buf, int buflen) |
icraggs | 0:7734401cc1b4 | 81 | { |
icraggs | 0:7734401cc1b4 | 82 | MQTTHeader header; |
icraggs | 0:7734401cc1b4 | 83 | char* curdata = buf; |
icraggs | 0:7734401cc1b4 | 84 | char* enddata = NULL; |
icraggs | 0:7734401cc1b4 | 85 | int rc = 0; |
icraggs | 0:7734401cc1b4 | 86 | int mylen; |
icraggs | 0:7734401cc1b4 | 87 | |
icraggs | 0:7734401cc1b4 | 88 | FUNC_ENTRY; |
icraggs | 0:7734401cc1b4 | 89 | header.byte = readChar(&curdata); |
icraggs | 0:7734401cc1b4 | 90 | *dup = header.bits.dup; |
icraggs | 0:7734401cc1b4 | 91 | *type = header.bits.type; |
icraggs | 0:7734401cc1b4 | 92 | |
icraggs | 0:7734401cc1b4 | 93 | curdata += (rc = MQTTPacket_decodeBuf(curdata, &mylen)); /* read remaining length */ |
icraggs | 0:7734401cc1b4 | 94 | enddata = curdata + mylen; |
icraggs | 0:7734401cc1b4 | 95 | |
icraggs | 0:7734401cc1b4 | 96 | if (enddata - curdata < 2) |
icraggs | 0:7734401cc1b4 | 97 | goto exit; |
icraggs | 0:7734401cc1b4 | 98 | *packetid = readInt(&curdata); |
icraggs | 0:7734401cc1b4 | 99 | |
icraggs | 0:7734401cc1b4 | 100 | rc = 1; |
icraggs | 0:7734401cc1b4 | 101 | exit: |
icraggs | 0:7734401cc1b4 | 102 | FUNC_EXIT_RC(rc); |
icraggs | 0:7734401cc1b4 | 103 | return rc; |
icraggs | 0:7734401cc1b4 | 104 | } |
icraggs | 0:7734401cc1b4 | 105 |