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As specified by RFC 9204, encoder and decoder streams must not be closed. If the peer behaves incorrectly and closes one of them, emit a H3_CLOSED_CRITICAL_STREAM connection error. To implement this, QPACK stream decoding API has been slightly adjusted. Firstly, fin parameter is passed to notify about FIN STREAM bit. Secondly, qcs instance is passed via unused void* context. This allows to use qcc_emit_cc_app() function to report a CONNECTION_CLOSE error.
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* QPACK decompressor
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*
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* Copyright 2021 HAProxy Technologies, Frederic Lecaille <flecaille@haproxy.com>
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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, version 2.1
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* exclusively.
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_QPACK_DEC_H
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#define _HAPROXY_QPACK_DEC_H
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struct buffer;
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struct http_hdr;
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/* Internal QPACK processing errors.
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*Nothing to see with the RFC.
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*/
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enum {
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QPACK_ERR_NONE = 0, /* no error */
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QPACK_ERR_RIC, /* cannot decode Required Insert Count prefix field */
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QPACK_ERR_DB, /* cannot decode Delta Base prefix field */
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QPACK_ERR_TRUNCATED, /* truncated stream */
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QPACK_ERR_HUFFMAN, /* huffman decoding error */
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QPACK_ERR_TOO_LARGE, /* decoded request/response is too large */
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};
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struct qpack_dec {
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/* Insert count */
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uint64_t ic;
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/* Known received count */
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uint64_t krc;
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};
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int qpack_decode_fs(const unsigned char *buf, uint64_t len, struct buffer *tmp,
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struct http_hdr *list, int list_size);
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int qpack_decode_enc(struct buffer *buf, int fin, void *ctx);
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int qpack_decode_dec(struct buffer *buf, int fin, void *ctx);
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#endif /* _HAPROXY_QPACK_DEC_H */
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