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 
19 struct 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 
44 void sctp_stream_interleave_init(struct sctp_stream *stream);
45 
46 #endif /* __sctp_stream_interleave_h__ */
47