1/*-
  2 * SPDX-License-Identifier: BSD-3-Clause
  3 *
  4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
  5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
  6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions are met:
 10 *
 11 * a) Redistributions of source code must retain the above copyright notice,
 12 *    this list of conditions and the following disclaimer.
 13 *
 14 * b) Redistributions in binary form must reproduce the above copyright
 15 *    notice, this list of conditions and the following disclaimer in
 16 *    the documentation and/or other materials provided with the distribution.
 17 *
 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
 19 *    contributors may be used to endorse or promote products derived
 20 *    from this software without specific prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 32 * THE POSSIBILITY OF SUCH DAMAGE.
 33 */
 34
 35#ifndef _NETINET_SCTP_INDATA_H_
 36#define _NETINET_SCTP_INDATA_H_
 37
 38#if defined(_KERNEL) || defined(__Userspace__)
 39
 40struct sctp_queued_to_read *
 41sctp_build_readq_entry(struct sctp_tcb *stcb,
 42    struct sctp_nets *net,
 43    uint32_t tsn, uint32_t ppid,
 44    uint32_t context, uint16_t sid,
 45    uint32_t mid, uint8_t flags,
 46    struct mbuf *dm);
 47
 48#define sctp_build_readq_entry_mac(_ctl, in_it, context, net, tsn, ppid, sid, flags, dm, tfsn, mid) do { \
 49	if (_ctl) { \
 50		atomic_add_int(&((net)->ref_count), 1); \
 51		memset(_ctl, 0, sizeof(struct sctp_queued_to_read)); \
 52		(_ctl)->sinfo_stream = sid; \
 53		TAILQ_INIT(&_ctl->reasm); \
 54		(_ctl)->top_fsn = tfsn; \
 55		(_ctl)->mid = mid; \
 56		(_ctl)->sinfo_flags = (flags << 8); \
 57		(_ctl)->sinfo_ppid = ppid; \
 58		(_ctl)->sinfo_context = context; \
 59		(_ctl)->fsn_included = 0xffffffff; \
 60		(_ctl)->sinfo_tsn = tsn; \
 61		(_ctl)->sinfo_cumtsn = tsn; \
 62		(_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
 63		(_ctl)->whoFrom = net; \
 64		(_ctl)->data = dm; \
 65		(_ctl)->stcb = (in_it); \
 66		(_ctl)->port_from = (in_it)->rport; \
 67		if ((in_it)->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { \
 68			(_ctl)->do_not_ref_stcb = 1; \
 69		}\
 70	} \
 71} while (0)
 72
 73struct mbuf *
 74sctp_build_ctl_nchunk(struct sctp_inpcb *inp,
 75    struct sctp_sndrcvinfo *sinfo);
 76
 77void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *);
 78
 79uint32_t
 80         sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc);
 81
 82void
 83sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack,
 84    uint32_t rwnd, int *abort_now, int ecne_seen);
 85
 86void
 87sctp_handle_sack(struct mbuf *m, int offset_seg, int offset_dup,
 88    struct sctp_tcb *stcb,
 89    uint16_t num_seg, uint16_t num_nr_seg, uint16_t num_dup,
 90    int *abort_now, uint8_t flags,
 91    uint32_t cum_ack, uint32_t rwnd, int ecne_seen);
 92
 93/* draft-ietf-tsvwg-usctp */
 94void
 95sctp_handle_forward_tsn(struct sctp_tcb *,
 96    struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
 97
 98struct sctp_tmit_chunk *sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
 99
100void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
101
102void
103     sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *, int *);
104
105int
106sctp_process_data(struct mbuf **, int, int *, int,
107    struct sctp_inpcb *, struct sctp_tcb *,
108    struct sctp_nets *, uint32_t *);
109
110void sctp_slide_mapping_arrays(struct sctp_tcb *stcb);
111
112void sctp_sack_check(struct sctp_tcb *, int);
113
114#endif
115#endif