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#ifndef HEADER_CURL_WS_H
#define HEADER_CURL_WS_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_WEBSOCKETS
#ifdef USE_HYPER
#define REQTYPE void
#else
#define REQTYPE struct dynbuf
#endif
/* a client-side WS frame decoder, parsing frame headers and
* payload, keeping track of current position and stats */
enum ws_dec_state {
WS_DEC_INIT,
WS_DEC_HEAD,
WS_DEC_PAYLOAD
};
struct ws_decoder {
int frame_age; /* zero */
int frame_flags; /* See the CURLWS_* defines */
curl_off_t payload_offset; /* the offset parsing is at */
curl_off_t payload_len;
unsigned char head[10];
int head_len, head_total;
enum ws_dec_state state;
};
/* a client-side WS frame encoder, generating frame headers and
* converting payloads, tracking remaining data in current frame */
struct ws_encoder {
curl_off_t payload_len; /* payload length of current frame */
curl_off_t payload_remain; /* remaining payload of current */
unsigned int xori; /* xor index */
unsigned char mask[4]; /* 32 bit mask for this connection */
unsigned char firstbyte; /* first byte of frame we encode */
bool contfragment; /* set TRUE if the previous fragment sent was not final */
};
/* A websocket connection with en- and decoder that treat frames
* and keep track of boundaries. */
struct websocket {
struct Curl_easy *data; /* used for write callback handling */
struct ws_decoder dec; /* decode of we frames */
struct ws_encoder enc; /* decode of we frames */
struct bufq recvbuf; /* raw data from the server */
struct bufq sendbuf; /* raw data to be sent to the server */
struct curl_ws_frame frame; /* the current WS FRAME received */
};
CURLcode Curl_ws_request(struct Curl_easy *data, REQTYPE *req);
CURLcode Curl_ws_accept(struct Curl_easy *data, const char *mem, size_t len);
size_t Curl_ws_writecb(char *buffer, size_t size, size_t nitems, void *userp);
void Curl_ws_done(struct Curl_easy *data);
CURLcode Curl_ws_disconnect(struct Curl_easy *data,
struct connectdata *conn,
bool dead_connection);
#else
#define Curl_ws_request(x,y) CURLE_OK
#define Curl_ws_done(x) Curl_nop_stmt
#define Curl_ws_free(x) Curl_nop_stmt
#endif
#endif /* HEADER_CURL_WS_H */
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