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#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#ifndef _NETINET_SCTP_INDATA_H_
39#define _NETINET_SCTP_INDATA_H_
40
41#if defined(_KERNEL) || defined(__Userspace__)
42
43struct sctp_queued_to_read *
44sctp_build_readq_entry(struct sctp_tcb *stcb,
45    struct sctp_nets *net,
46    uint32_t tsn, uint32_t ppid,
47    uint32_t context, uint16_t sid,
48    uint32_t mid, uint8_t flags,
49    struct mbuf *dm);
50
51#define sctp_build_readq_entry_mac(_ctl, in_it, context, net, tsn, ppid, sid, flags, dm, tfsn, mid) do { \
52	if (_ctl) { \
53		atomic_add_int(&((net)->ref_count), 1); \
54		memset(_ctl, 0, sizeof(struct sctp_queued_to_read)); \
55		(_ctl)->sinfo_stream = sid; \
56		TAILQ_INIT(&_ctl->reasm); \
57		(_ctl)->top_fsn = tfsn; \
58		(_ctl)->mid = mid; \
59		(_ctl)->sinfo_flags = (flags << 8); \
60		(_ctl)->sinfo_ppid = ppid; \
61		(_ctl)->sinfo_context = context; \
62		(_ctl)->fsn_included = 0xffffffff; \
63		(_ctl)->sinfo_tsn = tsn; \
64		(_ctl)->sinfo_cumtsn = tsn; \
65		(_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
66		(_ctl)->whoFrom = net; \
67		(_ctl)->data = dm; \
68		(_ctl)->stcb = (in_it); \
69		(_ctl)->port_from = (in_it)->rport; \
70		if ((in_it)->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { \
71			(_ctl)->do_not_ref_stcb = 1; \
72		}\
73	} \
74} while (0)
75
76struct mbuf *
77sctp_build_ctl_nchunk(struct sctp_inpcb *inp,
78    struct sctp_sndrcvinfo *sinfo);
79
80void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *);
81
82uint32_t
83         sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc);
84
85void
86sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack,
87    uint32_t rwnd, int *abort_now, int ecne_seen);
88
89void
90sctp_handle_sack(struct mbuf *m, int offset_seg, int offset_dup,
91    struct sctp_tcb *stcb,
92    uint16_t num_seg, uint16_t num_nr_seg, uint16_t num_dup,
93    int *abort_now, uint8_t flags,
94    uint32_t cum_ack, uint32_t rwnd, int ecne_seen);
95
96/* draft-ietf-tsvwg-usctp */
97void
98sctp_handle_forward_tsn(struct sctp_tcb *,
99    struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
100
101struct sctp_tmit_chunk *sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
102
103void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
104
105void
106     sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *, int *);
107
108int
109sctp_process_data(struct mbuf **, int, int *, int,
110    struct sctp_inpcb *, struct sctp_tcb *,
111    struct sctp_nets *, uint32_t *);
112
113void sctp_slide_mapping_arrays(struct sctp_tcb *stcb);
114
115void sctp_sack_check(struct sctp_tcb *, int);
116
117#endif
118#endif
119