text: /*-
   * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * a) Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   *
   * b) Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the distribution.
   *
   * c) Neither the name of Cisco Systems, Inc. nor the names of its
   *    contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifdef __FreeBSD__
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: head/sys/netinet/sctp_indata.h 252585 2013-07-03 18:48:43Z tuexen $");
  #endif
  
  #ifndef _NETINET_SCTP_INDATA_H_
  #define _NETINET_SCTP_INDATA_H_
  
  #if defined(_KERNEL) || defined(__Userspace__)
  
  struct sctp_queued_to_read *
  sctp_build_readq_entry(struct sctp_tcb *stcb,
      struct sctp_nets *net,
      uint32_t tsn, uint32_t ppid,
      uint32_t context, uint16_t stream_no,
      uint16_t stream_seq, uint8_t flags,
      struct mbuf *dm);
  
  
  #define sctp_build_readq_entry_mac(_ctl, in_it, context, net, tsn, ppid, stream_no, stream_seq, flags, dm, tfsn, msgid) do { \
  	if (_ctl) { \
  		atomic_add_int(&((net)->ref_count), 1); \
  		memset(_ctl, 0, sizeof(struct sctp_queued_to_read)); \
  		(_ctl)->sinfo_stream = stream_no; \
  		(_ctl)->sinfo_ssn = stream_seq; \
  		TAILQ_INIT(&_ctl->reasm);	\
  		(_ctl)->top_fsn = tfsn; \
  		(_ctl)->msg_id = msgid; \
  		(_ctl)->sinfo_flags = (flags << 8); \
  		(_ctl)->sinfo_ppid = ppid; \
  		(_ctl)->sinfo_context = context; \
  		(_ctl)->sinfo_tsn = tsn; \
  		(_ctl)->sinfo_cumtsn = tsn; \
  		(_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
  		(_ctl)->whoFrom = net; \
  		(_ctl)->data = dm; \
  		(_ctl)->stcb = (in_it); \
  		(_ctl)->port_from = (in_it)->rport; \
  	} \
  } while (0)
  
  
  
  struct mbuf *
  sctp_build_ctl_nchunk(struct sctp_inpcb *inp,
  		      struct sctp_sndrcvinfo *sinfo);
  
  void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *);
  
  uint32_t
  sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc);
  
  void
  sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack,
  			 uint32_t rwnd, int *abort_now, int ecne_seen);
  
  void
  sctp_handle_sack(struct mbuf *m, int offset_seg, int offset_dup,
                   struct sctp_tcb *stcb,
                   uint16_t num_seg, uint16_t num_nr_seg, uint16_t num_dup,
                   int *abort_now, uint8_t flags,
                   uint32_t cum_ack, uint32_t rwnd, int ecne_seen);
  
  /* draft-ietf-tsvwg-usctp */
  void
  sctp_handle_forward_tsn(struct sctp_tcb *,
  			struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
  
  struct sctp_tmit_chunk *
  sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
  
  void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
  
  void
  sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *, int *);
  
  int
  sctp_process_data(struct mbuf **, int, int *, int,
                    struct sockaddr *src, struct sockaddr *dst,
                    struct sctphdr *,
  		  struct sctp_inpcb *, struct sctp_tcb *,
  		  struct sctp_nets *, uint32_t *,
  #if defined(__FreeBSD__)
                    uint8_t, uint32_t,
  #endif
                    uint32_t, uint16_t);
  
  void sctp_slide_mapping_arrays(struct sctp_tcb *stcb);
  
  void sctp_sack_check(struct sctp_tcb *, int);
  
  #endif
  #endif
  