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https://gitlab.uni-freiburg.de/opensourcevdi/spice
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cd2a317096
We do this by auto detecting the inbound http(s) 'GET' and probing for a well formulated WebSocket binary connection, such as used by the spice-html5 client. If detected, we implement a set of cover functions that abstract the read/write/writev functions, in a fashion similar to the SASL implementation. This includes a limited implementation of the WebSocket protocol, sufficient for our purposes. Signed-off-by: Jeremy White <jwhite@codeweavers.com> Acked-by: Frediano Ziglio <fziglio@redhat.com>
45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
/*
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* Copyright (C) 2015 Jeremy White
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define WEBSOCKET_MAX_HEADER_SIZE (1 + 9 + 4)
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typedef struct {
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int type;
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int masked;
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uint8_t header[WEBSOCKET_MAX_HEADER_SIZE];
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int header_pos;
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int frame_ready:1;
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uint8_t mask[4];
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uint64_t relayed;
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uint64_t expected_len;
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} websocket_frame_t;
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typedef ssize_t (*websocket_read_cb_t)(void *opaque, void *buf, size_t nbyte);
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typedef ssize_t (*websocket_write_cb_t)(void *opaque, const void *buf, size_t nbyte);
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typedef ssize_t (*websocket_writev_cb_t)(void *opaque, struct iovec *iov, int iovcnt);
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bool websocket_is_start(char *buf);
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void websocket_create_reply(char *buf, char *outbuf);
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int websocket_read(void *opaque, uint8_t *buf, int len, websocket_frame_t *frame,
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websocket_read_cb_t read_cb,
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websocket_write_cb_t write_cb);
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int websocket_write(void *opaque, const uint8_t *buf, int len, uint64_t *remainder,
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websocket_write_cb_t write_cb);
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int websocket_writev(void *opaque, struct iovec *iov, int iovcnt, uint64_t *remainder,
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websocket_writev_cb_t writev_cb);
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void websocket_ack_close(void *opaque, websocket_write_cb_t write_cb);
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