mirror of
https://gitee.com/Lyon1998/pikapython.git
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158 lines
4.6 KiB
C
158 lines
4.6 KiB
C
/*******************************************************************************
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* Copyright (c) 2014 IBM Corp.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* and Eclipse Distribution License v1.0 which accompany this distribution.
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*
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* The Eclipse Public License is available at
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* http://www.eclipse.org/legal/epl-v10.html
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Ian Craggs - initial API and implementation and/or initial documentation
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* Xiang Rong - 442039 Add makefile to Embedded C client
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*******************************************************************************/
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#ifndef MQTTPACKET_H_
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#define MQTTPACKET_H_
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#if defined(__cplusplus) /* If this is a C++ compiler, use C linkage */
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extern "C" {
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#endif
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#if defined(WIN32_DLL) || defined(WIN64_DLL)
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#define DLLImport __declspec(dllimport)
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#define DLLExport __declspec(dllexport)
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#elif defined(LINUX_SO)
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#define DLLImport extern
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#define DLLExport __attribute__((visibility("default")))
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#else
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#define DLLImport
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#define DLLExport
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#endif
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enum errors {
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MQTTPACKET_BUFFER_TOO_SHORT = -2,
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MQTTPACKET_READ_ERROR = -1,
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MQTTPACKET_READ_COMPLETE
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};
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enum msgTypes {
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CONNECT = 1,
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CONNACK,
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PUBLISH,
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PUBACK,
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PUBREC,
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PUBREL,
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PUBCOMP,
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SUBSCRIBE,
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SUBACK,
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UNSUBSCRIBE,
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UNSUBACK,
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PINGREQ,
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PINGRESP,
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DISCONNECT
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};
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/**
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* Bitfields for the MQTT header byte.
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*/
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typedef union {
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unsigned char byte; /**< the whole byte */
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#if defined(REVERSED)
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struct {
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unsigned int type : 4; /**< message type nibble */
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unsigned int dup : 1; /**< DUP flag bit */
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unsigned int qos : 2; /**< QoS value, 0, 1 or 2 */
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unsigned int retain : 1; /**< retained flag bit */
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} bits;
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#else
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struct {
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unsigned int retain : 1; /**< retained flag bit */
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unsigned int qos : 2; /**< QoS value, 0, 1 or 2 */
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unsigned int dup : 1; /**< DUP flag bit */
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unsigned int type : 4; /**< message type nibble */
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} bits;
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#endif
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} MQTTHeader;
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typedef struct {
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int len;
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char* data;
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} MQTTLenString;
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typedef struct {
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char* cstring;
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MQTTLenString lenstring;
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} MQTTString;
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#define MQTTString_initializer \
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{ \
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NULL, { \
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0, NULL \
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} \
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}
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int MQTTstrlen(MQTTString mqttstring);
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#include "MQTTConnect.h"
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#include "MQTTFormat.h"
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#include "MQTTPublish.h"
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#include "MQTTSubscribe.h"
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#include "MQTTUnsubscribe.h"
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DLLExport int MQTTSerialize_ack(unsigned char* buf,
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int buflen,
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unsigned char type,
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unsigned char dup,
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unsigned short packetid);
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DLLExport int MQTTDeserialize_ack(unsigned char* packettype,
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unsigned char* dup,
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unsigned short* packetid,
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unsigned char* buf,
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int buflen);
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int MQTTPacket_len(int rem_len);
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DLLExport int MQTTPacket_equals(MQTTString* a, char* b);
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DLLExport int MQTTPacket_encode(unsigned char* buf, int length);
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int MQTTPacket_decode(int (*getcharfn)(unsigned char*, int), int* value);
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int MQTTPacket_decodeBuf(unsigned char* buf, int* value);
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int readInt(unsigned char** pptr);
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char readChar(unsigned char** pptr);
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void writeChar(unsigned char** pptr, char c);
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void writeInt(unsigned char** pptr, int anInt);
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int readMQTTLenString(MQTTString* mqttstring,
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unsigned char** pptr,
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unsigned char* enddata);
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void writeCString(unsigned char** pptr, const char* string);
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void writeMQTTString(unsigned char** pptr, MQTTString mqttstring);
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DLLExport int MQTTPacket_read(unsigned char* buf,
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int buflen,
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int (*getfn)(unsigned char*, int));
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typedef struct {
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int (*getfn)(void*,
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unsigned char*,
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int); /* must return -1 for error, 0 for call again, or the
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number of bytes read */
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void* sck; /* pointer to whatever the system may use to identify the
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transport */
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int multiplier;
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int rem_len;
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int len;
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char state;
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} MQTTTransport;
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int MQTTPacket_readnb(unsigned char* buf, int buflen, MQTTTransport* trp);
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#ifdef __cplusplus /* If this is a C++ compiler, use C linkage */
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}
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#endif
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#endif /* MQTTPACKET_H_ */
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