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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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mongoose.h
+43 -13
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@@ -562,18 +562,19 @@ void mg_call(struct mg_connection *c, int ev, void *ev_data);
void mg_error(struct mg_connection *c, const char *fmt, ...);
enum {
MG_EV_ERROR, // Error char *error_message
MG_EV_POLL, // mg_mgr_poll iteration unsigned long *millis
MG_EV_RESOLVE, // Host name is resolved NULL
MG_EV_CONNECT, // Connection established NULL
MG_EV_ACCEPT, // Connection accepted NULL
MG_EV_READ, // Data received from socket struct mg_str *
MG_EV_WRITE, // Data written to socket int *num_bytes_written
MG_EV_CLOSE, // Connection closed NULL
MG_EV_HTTP_MSG, // HTTP request/response struct mg_http_message *
MG_EV_ERROR, // Error char *error_message
MG_EV_POLL, // mg_mgr_poll iteration unsigned long *millis
MG_EV_RESOLVE, // Host name is resolved NULL
MG_EV_CONNECT, // Connection established NULL
MG_EV_ACCEPT, // Connection accepted NULL
MG_EV_READ, // Data received from socket struct mg_str *
MG_EV_WRITE, // Data written to socket int *num_bytes_written
MG_EV_CLOSE, // Connection closed NULL
MG_EV_HTTP_MSG, // HTTP request/response struct mg_http_message *
MG_EV_WS_OPEN, // Websocket handshake done NULL
MG_EV_WS_MSG, // Websocket message received struct mg_ws_message *
MG_EV_MQTT_MSG, // MQTT message struct mg_mqtt_message *
MG_EV_MQTT_CMD, // MQTT low-level command struct mg_mqtt_message *
MG_EV_MQTT_MSG, // MQTT PUBLISH received struct mg_mqtt_message *
MG_EV_MQTT_OPEN, // MQTT CONNACK received int *connack_status_code
MG_EV_SNTP_TIME, // SNTP time received struct timeval *
MG_EV_USER, // Starting ID for user events
@@ -584,7 +585,6 @@ enum {
struct mg_mgr {
struct mg_connection *conns; // List of active connections
struct mg_connection *dnsc; // DNS resolver connection
@@ -739,6 +739,25 @@ int mg_sntp_parse(const unsigned char *buf, size_t len, struct timeval *tv);
#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;
@@ -750,17 +769,28 @@ 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);