1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* SCTP kernel implementation
3 * (C) Copyright Red Hat Inc. 2017
4 *
5 * These are definitions used by the stream schedulers, defined in RFC
6 * draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11)
7 *
8 * Please send any bug reports or fixes you make to the
9 * email addresses:
10 *    lksctp developers <linux-sctp@vger.kernel.org>
11 *
12 * Written or modified by:
13 *   Xin Long <lucien.xin@gmail.com>
14 */
15
16#ifndef __sctp_stream_interleave_h__
17#define __sctp_stream_interleave_h__
18
19struct sctp_stream_interleave {
20	__u16	data_chunk_len;
21	__u16	ftsn_chunk_len;
22	/* (I-)DATA process */
23	struct sctp_chunk *(*make_datafrag)(const struct sctp_association *asoc,
24					    const struct sctp_sndrcvinfo *sinfo,
25					    int len, __u8 flags, gfp_t gfp);
26	void	(*assign_number)(struct sctp_chunk *chunk);
27	bool	(*validate_data)(struct sctp_chunk *chunk);
28	int	(*ulpevent_data)(struct sctp_ulpq *ulpq,
29				 struct sctp_chunk *chunk, gfp_t gfp);
30	int	(*enqueue_event)(struct sctp_ulpq *ulpq,
31				 struct sctp_ulpevent *event);
32	void	(*renege_events)(struct sctp_ulpq *ulpq,
33				 struct sctp_chunk *chunk, gfp_t gfp);
34	void	(*start_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
35	void	(*abort_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
36	/* (I-)FORWARD-TSN process */
37	void	(*generate_ftsn)(struct sctp_outq *q, __u32 ctsn);
38	bool	(*validate_ftsn)(struct sctp_chunk *chunk);
39	void	(*report_ftsn)(struct sctp_ulpq *ulpq, __u32 ftsn);
40	void	(*handle_ftsn)(struct sctp_ulpq *ulpq,
41			       struct sctp_chunk *chunk);
42};
43
44void sctp_stream_interleave_init(struct sctp_stream *stream);
45
46#endif /* __sctp_stream_interleave_h__ */
47