1/* SCTP kernel implementation
 2 * (C) Copyright Red Hat Inc. 2017
 3 *
 4 * These are definitions used by the stream schedulers, defined in RFC
 5 * draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11)
 6 *
 7 * This SCTP implementation is free software;
 8 * you can redistribute it and/or modify it under the terms of
 9 * the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This SCTP implementation  is distributed in the hope that it
14 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
15 *                 ************************
16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17 * See the GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with GNU CC; see the file COPYING.  If not, see
21 * <http://www.gnu.org/licenses/>.
22 *
23 * Please send any bug reports or fixes you make to the
24 * email addresses:
25 *    lksctp developers <linux-sctp@vger.kernel.org>
26 *
27 * Written or modified by:
28 *   Xin Long <lucien.xin@gmail.com>
29 */
30
31#ifndef __sctp_stream_interleave_h__
32#define __sctp_stream_interleave_h__
33
34struct sctp_stream_interleave {
35	__u16	data_chunk_len;
36	__u16	ftsn_chunk_len;
37	/* (I-)DATA process */
38	struct sctp_chunk *(*make_datafrag)(const struct sctp_association *asoc,
39					    const struct sctp_sndrcvinfo *sinfo,
40					    int len, __u8 flags, gfp_t gfp);
41	void	(*assign_number)(struct sctp_chunk *chunk);
42	bool	(*validate_data)(struct sctp_chunk *chunk);
43	int	(*ulpevent_data)(struct sctp_ulpq *ulpq,
44				 struct sctp_chunk *chunk, gfp_t gfp);
45	int	(*enqueue_event)(struct sctp_ulpq *ulpq,
46				 struct sctp_ulpevent *event);
47	void	(*renege_events)(struct sctp_ulpq *ulpq,
48				 struct sctp_chunk *chunk, gfp_t gfp);
49	void	(*start_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
50	void	(*abort_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
51	/* (I-)FORWARD-TSN process */
52	void	(*generate_ftsn)(struct sctp_outq *q, __u32 ctsn);
53	bool	(*validate_ftsn)(struct sctp_chunk *chunk);
54	void	(*report_ftsn)(struct sctp_ulpq *ulpq, __u32 ftsn);
55	void	(*handle_ftsn)(struct sctp_ulpq *ulpq,
56			       struct sctp_chunk *chunk);
57};
58
59void sctp_stream_interleave_init(struct sctp_stream *stream);
60
61#endif /* __sctp_stream_interleave_h__ */