include/net/sctp/stream_interleave.h

   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__ */