include/net/sctp/stream_interleave.h

   1 /* SCTP kernel implementation
   2  * (C) Copyright Red Hat Inc. 2017
   3  *
   4  * These are definitions used by the stream schedulers, defined in RFC
   5  * draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11)
   6  *
   7  * This SCTP implementation is free software;
   8  * you can redistribute it and/or modify it under the terms of
   9  * the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This SCTP implementation  is distributed in the hope that it
  14  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  15  *                 ************************
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17  * See the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with GNU CC; see the file COPYING.  If not, see
  21  * <http://www.gnu.org/licenses/>.
  22  *
  23  * Please send any bug reports or fixes you make to the
  24  * email addresses:
  25  *    lksctp developers <linux-sctp@vger.kernel.org>
  26  *
  27  * Written or modified by:
  28  *   Xin Long <lucien.xin@gmail.com>
  29  */
  30
  31 #ifndef __sctp_stream_interleave_h__
  32 #define __sctp_stream_interleave_h__
  33
  34 struct sctp_stream_interleave {
  35         __u16   data_chunk_len;
  36         __u16   ftsn_chunk_len;
  37         /* (I-)DATA process */
  38         struct sctp_chunk *(*make_datafrag)(const struct sctp_association *asoc,
  39                                             const struct sctp_sndrcvinfo *sinfo,
  40                                             int len, __u8 flags, gfp_t gfp);
  41         void    (*assign_number)(struct sctp_chunk *chunk);
  42         bool    (*validate_data)(struct sctp_chunk *chunk);
  43         int     (*ulpevent_data)(struct sctp_ulpq *ulpq,
  44                                  struct sctp_chunk *chunk, gfp_t gfp);
  45         int     (*enqueue_event)(struct sctp_ulpq *ulpq,
  46                                  struct sctp_ulpevent *event);
  47         void    (*renege_events)(struct sctp_ulpq *ulpq,
  48                                  struct sctp_chunk *chunk, gfp_t gfp);
  49         void    (*start_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
  50         void    (*abort_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
  51         /* (I-)FORWARD-TSN process */
  52         void    (*generate_ftsn)(struct sctp_outq *q, __u32 ctsn);
  53         bool    (*validate_ftsn)(struct sctp_chunk *chunk);
  54         void    (*report_ftsn)(struct sctp_ulpq *ulpq, __u32 ftsn);
  55         void    (*handle_ftsn)(struct sctp_ulpq *ulpq,
  56                                struct sctp_chunk *chunk);
  57 };
  58
  59 void sctp_stream_interleave_init(struct sctp_stream *stream);
  60
  61 #endif /* __sctp_stream_interleave_h__ */