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