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Add mqtt-server example

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cpq committed 2020-12-15 20:29:47 +00:00
1 parent f176e1ae59
commit 8d45cf6972
7 files changed
+292 -109
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src/mqtt.h
+32 -2
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@@ -3,6 +3,25 @@
#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_QOS(qos) ((qos) << 1)
#define MQTT_GET_QOS(flags) (((flags) &0x6) >> 1)
#define MQTT_SET_QOS(flags, qos) (flags) = ((flags) & ~0x6) | ((qos) << 1)
struct mg_mqtt_opts {
struct mg_str client_id;
struct mg_str will_topic;
@@ -14,14 +33,25 @@ struct mg_mqtt_opts {
};
struct mg_mqtt_message {
struct mg_str topic;
struct mg_str data;
struct mg_str topic; // Parsed topic
struct mg_str data; // Parsed message
struct mg_str dgram; // Whole MQTT datagram, including headers
uint16_t id; // Set 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
};
struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
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_pub(struct mg_connection *, struct mg_str *topic,
struct mg_str *data);
void mg_mqtt_sub(struct mg_connection *, struct mg_str *topic);
int mg_mqtt_parse(const unsigned char *buf, int len, struct mg_mqtt_message *m);
void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
uint32_t len);
int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, int pos);