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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef ACLK_LWS_WSS_CLIENT_H
#define ACLK_LWS_WSS_CLIENT_H
#include <libwebsockets.h>
#include "libnetdata/libnetdata.h"
// This is as define because ideally the ACLK at high level
// can do mosquitto writes and reads only from one thread
// which is cleaner implementation IMHO
// in such case this mutexes are not necessary and life
// is simpler
#define ACLK_LWS_MOSQUITTO_IO_CALLS_MULTITHREADED 1
#define ACLK_LWS_WSS_RECV_BUFF_SIZE_BYTES (128 * 1024)
#define ACLK_LWS_CALLBACK_HISTORY 10
#ifdef ACLK_LWS_MOSQUITTO_IO_CALLS_MULTITHREADED
#define aclk_lws_mutex_init(x) netdata_mutex_init(x)
#define aclk_lws_mutex_lock(x) netdata_mutex_lock(x)
#define aclk_lws_mutex_unlock(x) netdata_mutex_unlock(x)
#else
#define aclk_lws_mutex_init(x)
#define aclk_lws_mutex_lock(x)
#define aclk_lws_mutex_unlock(x)
#endif
struct aclk_lws_wss_engine_callbacks {
void (*connection_established_callback)();
void (*data_rcvd_callback)();
void (*data_writable_callback)();
void (*connection_closed)();
};
struct lws_wss_packet_buffer {
unsigned char *data;
size_t data_size, written;
struct lws_wss_packet_buffer *next;
};
struct aclk_lws_wss_engine_instance {
//target host/port for connection
char *host;
int port;
//internal data
struct lws_context *lws_context;
struct lws *lws_wsi;
#ifdef ACLK_LWS_MOSQUITTO_IO_CALLS_MULTITHREADED
netdata_mutex_t write_buf_mutex;
netdata_mutex_t read_buf_mutex;
#endif
struct lws_wss_packet_buffer *write_buffer_head;
struct lws_ring *read_ringbuffer;
//flags to be readed by engine user
int websocket_connection_up;
// currently this is by default disabled
int data_to_read;
int upstream_reconnect_request;
int lws_callback_history[ACLK_LWS_CALLBACK_HISTORY];
};
void aclk_lws_wss_client_destroy();
void aclk_lws_wss_destroy_context();
int aclk_lws_wss_connect(char *host, int port);
int aclk_lws_wss_client_write(void *buf, size_t count);
int aclk_lws_wss_client_read(void *buf, size_t count);
void aclk_lws_wss_service_loop();
void aclk_lws_wss_mqtt_layer_disconnect_notif();
// Notifications inside the layer above
void aclk_lws_connection_established();
void aclk_lws_connection_data_received();
void aclk_lws_connection_closed();
void lws_wss_check_queues(size_t *write_len, size_t *write_len_bytes, size_t *read_len);
void aclk_wss_set_proxy(struct lws_vhost *vhost);
#define FRAGMENT_SIZE 4096
#endif
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