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
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