8368929a66
* paho_mqtt_c: refactor: rename symbols so they all have same prefix * Update AWS IOT example after MQTT refactoring
144 lines
4.1 KiB
C
144 lines
4.1 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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{
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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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{
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MQTTPACKET_CONNECT = 1,
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MQTTPACKET_CONNACK,
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MQTTPACKET_PUBLISH,
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MQTTPACKET_PUBACK,
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MQTTPACKET_PUBREC,
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MQTTPACKET_PUBREL,
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MQTTPACKET_PUBCOMP,
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MQTTPACKET_SUBSCRIBE,
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MQTTPACKET_SUBACK,
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MQTTPACKET_UNSUBSCRIBE,
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MQTTPACKET_UNSUBACK,
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MQTTPACKET_PINGREQ,
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MQTTPACKET_PINGRESP,
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MQTTPACKET_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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{
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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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{
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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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{
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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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} mqtt_header_t;
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typedef struct
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{
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int len;
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char* data;
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} mqtt_string_len_t;
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typedef struct
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{
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char* cstring;
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mqtt_string_len_t lenstring;
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} mqtt_string_t;
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#define mqtt_string_initializer {NULL, {0, NULL}}
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int mqtt_strlen(mqtt_string_t mqttstring);
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#include "MQTTConnect.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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#include "MQTTFormat.h"
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int mqtt_serialize_ack(unsigned char* buf, int buflen, unsigned char type, unsigned char dup, unsigned short packetid);
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int mqtt_deserialize_ack(unsigned char* packettype, unsigned char* dup, unsigned short* packetid, unsigned char* buf, int buflen);
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int mqtt_packet_len(int rem_len);
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int mqtt_packet_equals(mqtt_string_t* a, char* b);
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int mqtt_packet_encode(unsigned char* buf, int length);
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int mqtt_packet_decode(int (*getcharfn)(unsigned char*, int), int* value);
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int mqtt_packet_decode_buf(unsigned char* buf, int* value);
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int mqtt_read_int(unsigned char** pptr);
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char mqtt_read_char(unsigned char** pptr);
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void mqtt_write_char(unsigned char** pptr, char c);
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void mqtt_write_int(unsigned char** pptr, int anInt);
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int mqtt_read_str_len(mqtt_string_t* mqttstring, unsigned char** pptr, unsigned char* enddata);
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void mqtt_write_cstr(unsigned char** pptr, const char* string);
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void mqtt_write_mqqt_str(unsigned char** pptr, mqtt_string_t mqttstring);
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DLLExport int mqtt_packet_read(unsigned char* buf, int buflen, int (*getfn)(unsigned char*, int));
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typedef struct {
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int (*getfn)(void *, unsigned char*, int); /* must return -1 for error, 0 for call again, or the number of bytes read */
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void *sck; /* pointer to whatever the system may use to identify the 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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} mqtt_transport_t;
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int mqtt_packet_readnb(unsigned char* buf, int buflen, mqtt_transport_t *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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