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