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