LXR linux/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) */
  44struct sctp_ulpq {
  45        char pd_mode;
  46        struct sctp_association *asoc;
  47        struct sk_buff_head reasm;
  48        struct sk_buff_head reasm_uo;
  49        struct sk_buff_head lobby;
  50};
  51
  52/* Prototypes. */
  53struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
  54                                 struct sctp_association *);
  55void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
  56void sctp_ulpq_free(struct sctp_ulpq *);
  57
  58/* Add a new DATA chunk for processing. */
  59int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  60
  61/* Add a new event for propagation to the ULP. */
  62int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
  63
  64/* Renege previously received chunks.  */
  65void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
  66
  67/* Perform partial delivery. */
  68void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t);
  69
  70/* Abort the partial delivery. */
  71void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
  72
  73/* Clear the partial data delivery condition on this socket. */
  74int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
  75
  76/* Skip over an SSN. */
  77void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
  78
  79void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
  80
  81__u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq,
  82                            struct sk_buff_head *list, __u16 needed);
  83
  84#endif /* __sctp_ulpqueue_h__ */
  85