esp-idf/components/tcp_transport/include/esp_transport_ws.h

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/*
* This file is subject to the terms and conditions defined in
* file 'LICENSE', which is part of this source code package.
* Tuan PM <tuanpm at live dot com>
*/
#ifndef _ESP_TRANSPORT_WS_H_
#define _ESP_TRANSPORT_WS_H_
#include "esp_transport.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum ws_transport_opcodes {
WS_TRANSPORT_OPCODES_TEXT = 0x01,
WS_TRANSPORT_OPCODES_BINARY = 0x02,
WS_TRANSPORT_OPCODES_CLOSE = 0x08,
WS_TRANSPORT_OPCODES_PING = 0x09,
WS_TRANSPORT_OPCODES_PONG = 0x0a,
} ws_transport_opcodes_t;
/**
* @brief Create web socket transport
*
* @return
* - transport
* - NULL
*/
esp_transport_handle_t esp_transport_ws_init(esp_transport_handle_t parent_handle);
/**
* @brief Set HTTP path to update protocol to websocket
*
* @param t websocket transport handle
* @param path The HTTP Path
*/
void esp_transport_ws_set_path(esp_transport_handle_t t, const char *path);
/**
* @brief Set websocket sub protocol header
*
* @param t websocket transport handle
* @param sub_protocol Sub protocol string
*
* @return
* - ESP_OK on success
* - One of the error codes
*/
esp_err_t esp_transport_ws_set_subprotocol(esp_transport_handle_t t, const char *sub_protocol);
/**
* @brief Sends websocket raw message with custom opcode and payload
*
* Note that generic esp_transport_write for ws handle sends
* binary massages by default if size is > 0 and
* ping message if message size is set to 0.
* This API is provided to support explicit messages with arbitrary opcode,
* should it be PING, PONG or TEXT message with arbitrary data.
*
* @param[in] t Websocket transport handle
* @param[in] opcode ws operation code
* @param[in] buffer The buffer
* @param[in] len The length
* @param[in] timeout_ms The timeout milliseconds
*
* @return
* - Number of bytes was written
* - (-1) if there are any errors, should check errno
*/
int esp_transport_ws_send_raw(esp_transport_handle_t t, ws_transport_opcodes_t opcode, const char *b, int len, int timeout_ms);
/**
* @brief Returns websocket op-code for last received data
*
* @param t websocket transport handle
*
* @return
* - Received op-code as enum
*/
ws_transport_opcodes_t esp_transport_ws_get_read_opcode(esp_transport_handle_t t);
#ifdef __cplusplus
}
#endif
#endif /* _ESP_TRANSPORT_WS_H_ */