include/net/sctp/ulpqueue.h

   1 /* SCTP kernel 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  * This SCTP 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  * This SCTP 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, see
  28  * <http://www.gnu.org/licenses/>.
  29  *
  30  * Please send any bug reports or fixes you make to the
  31  * email addresses:
  32  *    lksctp developers <linux-sctp@vger.kernel.org>
  33  *
  34  * Written or modified by:
  35  *   Jon Grimm             <jgrimm@us.ibm.com>
  36  *   La Monte H.P. Yarroll <piggy@acm.org>
  37  *   Sridhar Samudrala     <sri@us.ibm.com>
  38  */
  39
  40 #ifndef __sctp_ulpqueue_h__
  41 #define __sctp_ulpqueue_h__
  42
  43 /* A structure to carry information to the ULP (e.g. Sockets API) */
  44 struct sctp_ulpq {
  45         char pd_mode;
  46         struct sctp_association *asoc;
  47         struct sk_buff_head reasm;
  48         struct sk_buff_head lobby;
  49 };
  50
  51 /* Prototypes. */
  52 struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
  53                                  struct sctp_association *);
  54 void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
  55 void sctp_ulpq_free(struct sctp_ulpq *);
  56
  57 /* Add a new DATA chunk for processing. */
  58 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  59
  60 /* Add a new event for propagation to the ULP. */
  61 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
  62
  63 /* Renege previously received chunks.  */
  64 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  65
  66 /* Perform partial delivery. */
  67 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t);
  68
  69 /* Abort the partial delivery. */
  70 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
  71
  72 /* Clear the partial data delivery condition on this socket. */
  73 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
  74
  75 /* Skip over an SSN. */
  76 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
  77
  78 void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
  79 #endif /* __sctp_ulpqueue_h__ */
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