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- #pragma once
- #include "net.h"
- #include "str.h"
- #define MQTT_CMD_CONNECT 1
- #define MQTT_CMD_CONNACK 2
- #define MQTT_CMD_PUBLISH 3
- #define MQTT_CMD_PUBACK 4
- #define MQTT_CMD_PUBREC 5
- #define MQTT_CMD_PUBREL 6
- #define MQTT_CMD_PUBCOMP 7
- #define MQTT_CMD_SUBSCRIBE 8
- #define MQTT_CMD_SUBACK 9
- #define MQTT_CMD_UNSUBSCRIBE 10
- #define MQTT_CMD_UNSUBACK 11
- #define MQTT_CMD_PINGREQ 12
- #define MQTT_CMD_PINGRESP 13
- #define MQTT_CMD_DISCONNECT 14
- #define MQTT_CMD_AUTH 15
- #define MQTT_PROP_PAYLOAD_FORMAT_INDICATOR 0x01
- #define MQTT_PROP_MESSAGE_EXPIRY_INTERVAL 0x02
- #define MQTT_PROP_CONTENT_TYPE 0x03
- #define MQTT_PROP_RESPONSE_TOPIC 0x08
- #define MQTT_PROP_CORRELATION_DATA 0x09
- #define MQTT_PROP_SUBSCRIPTION_IDENTIFIER 0x0B
- #define MQTT_PROP_SESSION_EXPIRY_INTERVAL 0x11
- #define MQTT_PROP_ASSIGNED_CLIENT_IDENTIFIER 0x12
- #define MQTT_PROP_SERVER_KEEP_ALIVE 0x13
- #define MQTT_PROP_AUTHENTICATION_METHOD 0x15
- #define MQTT_PROP_AUTHENTICATION_DATA 0x16
- #define MQTT_PROP_REQUEST_PROBLEM_INFORMATION 0x17
- #define MQTT_PROP_WILL_DELAY_INTERVAL 0x18
- #define MQTT_PROP_REQUEST_RESPONSE_INFORMATION 0x19
- #define MQTT_PROP_RESPONSE_INFORMATION 0x1A
- #define MQTT_PROP_SERVER_REFERENCE 0x1C
- #define MQTT_PROP_REASON_STRING 0x1F
- #define MQTT_PROP_RECEIVE_MAXIMUM 0x21
- #define MQTT_PROP_TOPIC_ALIAS_MAXIMUM 0x22
- #define MQTT_PROP_TOPIC_ALIAS 0x23
- #define MQTT_PROP_MAXIMUM_QOS 0x24
- #define MQTT_PROP_RETAIN_AVAILABLE 0x25
- #define MQTT_PROP_USER_PROPERTY 0x26
- #define MQTT_PROP_MAXIMUM_PACKET_SIZE 0x27
- #define MQTT_PROP_WILDCARD_SUBSCRIPTION_AVAILABLE 0x28
- #define MQTT_PROP_SUBSCRIPTION_IDENTIFIER_AVAILABLE 0x29
- #define MQTT_PROP_SHARED_SUBSCRIPTION_AVAILABLE 0x2A
- enum {
- MQTT_PROP_TYPE_BYTE,
- MQTT_PROP_TYPE_STRING,
- MQTT_PROP_TYPE_STRING_PAIR,
- MQTT_PROP_TYPE_BINARY_DATA,
- MQTT_PROP_TYPE_VARIABLE_INT,
- MQTT_PROP_TYPE_INT,
- MQTT_PROP_TYPE_SHORT
- };
- enum { MQTT_OK, MQTT_INCOMPLETE, MQTT_MALFORMED };
- struct mg_mqtt_prop {
- uint8_t id; // Enumerated at MQTT5 Reference
- uint32_t iv; // Integer value for 8-, 16-, 32-bit integers types
- struct mg_str key; // Non-NULL only for user property type
- struct mg_str val; // Non-NULL only for UTF-8 types and user properties
- };
- struct mg_mqtt_opts {
- struct mg_str user; // Username, can be empty
- struct mg_str pass; // Password, can be empty
- struct mg_str client_id; // Client ID
- struct mg_str topic; // message/subscription topic
- struct mg_str message; // message content
- uint8_t qos; // message quality of service
- uint8_t version; // Can be 4 (3.1.1), or 5. If 0, assume 4
- uint16_t keepalive; // Keep-alive timer in seconds
- bool retain; // Retain flag
- bool clean; // Clean session flag
- struct mg_mqtt_prop *props; // MQTT5 props array
- size_t num_props; // number of props
- struct mg_mqtt_prop *will_props; // Valid only for CONNECT packet (MQTT5)
- size_t num_will_props; // Number of will props
- };
- struct mg_mqtt_message {
- struct mg_str topic; // Parsed topic for PUBLISH
- struct mg_str data; // Parsed message for PUBLISH
- struct mg_str dgram; // Whole MQTT packet, including headers
- uint16_t id; // For PUBACK, PUBREC, PUBREL, PUBCOMP, SUBACK, PUBLISH
- uint8_t cmd; // MQTT command, one of MQTT_CMD_*
- uint8_t qos; // Quality of service
- uint8_t ack; // CONNACK return code, 0 = success
- size_t props_start; // Offset to the start of the properties (MQTT5)
- size_t props_size; // Length of the properties
- };
- struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
- const struct mg_mqtt_opts *opts,
- mg_event_handler_t fn, void *fn_data);
- struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
- mg_event_handler_t fn, void *fn_data);
- void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts);
- void mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
- void mg_mqtt_sub(struct mg_connection *, const struct mg_mqtt_opts *opts);
- int mg_mqtt_parse(const uint8_t *, size_t, uint8_t, struct mg_mqtt_message *);
- void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
- uint32_t len);
- void mg_mqtt_ping(struct mg_connection *);
- void mg_mqtt_pong(struct mg_connection *);
- void mg_mqtt_disconnect(struct mg_connection *, const struct mg_mqtt_opts *);
- size_t mg_mqtt_next_prop(struct mg_mqtt_message *, struct mg_mqtt_prop *,
- size_t ofs);
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