include/net/sctp/ulpqueue.h

   1 /* SCTP kernel reference Implementation
   2  * (C) Copyright IBM Corp. 2001, 2004
   3  * Copyright (c) 1999-2000 Cisco, Inc.
   4  * Copyright (c) 1999-2001 Motorola, Inc.
   5  * Copyright (c) 2001 Intel Corp.
   6  * Copyright (c) 2001 Nokia, Inc.
   7  * Copyright (c) 2001 La Monte H.P. Yarroll
   8  *
   9  * These are the definitions needed for the sctp_ulpq type.  The
  10  * sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
  11  * and the core SCTP state machine.  This is the component which handles
  12  * reassembly and ordering.
  13  *
  14  * The SCTP reference implementation  is free software;
  15  * you can redistribute it and/or modify it under the terms of
  16  * the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2, or (at your option)
  18  * any later version.
  19  *
  20  * the SCTP reference implementation  is distributed in the hope that it
  21  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  22  *                 ************************
  23  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  24  * See the GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with GNU CC; see the file COPYING.  If not, write to
  28  * the Free Software Foundation, 59 Temple Place - Suite 330,
  29  * Boston, MA 02111-1307, USA.
  30  *
  31  * Please send any bug reports or fixes you make to the
  32  * email addresses:
  33  *    lksctp developers <lksctp-developers@lists.sourceforge.net>
  34  *
  35  * Or submit a bug report through the following website:
  36  *    http://www.sf.net/projects/lksctp
  37  *
  38  * Written or modified by:
  39  *   Jon Grimm             <jgrimm@us.ibm.com>
  40  *   La Monte H.P. Yarroll <piggy@acm.org>
  41  *   Sridhar Samudrala     <sri@us.ibm.com>
  42  *
  43  * Any bugs reported given to us we will try to fix... any fixes shared will
  44  * be incorporated into the next SCTP release.
  45  */
  46
  47 #ifndef __sctp_ulpqueue_h__
  48 #define __sctp_ulpqueue_h__
  49
  50 /* A structure to carry information to the ULP (e.g. Sockets API) */
  51 struct sctp_ulpq {
  52         char malloced;
  53         char pd_mode;
  54         struct sctp_association *asoc;
  55         struct sk_buff_head reasm;
  56         struct sk_buff_head lobby;
  57 };
  58
  59 /* Prototypes. */
  60 struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
  61                                  struct sctp_association *);
  62 void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
  63 void sctp_ulpq_free(struct sctp_ulpq *);
  64
  65 /* Add a new DATA chunk for processing. */
  66 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  67
  68 /* Add a new event for propagation to the ULP. */
  69 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
  70
  71 /* Renege previously received chunks.  */
  72 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  73
  74 /* Perform partial delivery. */
  75 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  76
  77 /* Abort the partial delivery. */
  78 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
  79
  80 /* Clear the partial data delivery condition on this socket. */
  81 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
  82
  83 /* Skip over an SSN. */
  84 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
  85
  86 #endif /* __sctp_ulpqueue_h__ */
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