1 /*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #ifndef _NETINET_SCTP_INDATA_H_
37 #define _NETINET_SCTP_INDATA_H_
38
39 #if defined(_KERNEL) || defined(__Userspace__)
40
41 struct sctp_queued_to_read *
42 sctp_build_readq_entry(struct sctp_tcb *stcb,
43 struct sctp_nets *net,
44 uint32_t tsn, uint32_t ppid,
45 uint32_t context, uint16_t sid,
46 uint32_t mid, uint8_t flags,
47 struct mbuf *dm);
48
49
50 #define sctp_build_readq_entry_mac(_ctl, in_it, context, net, tsn, ppid, sid, flags, dm, tfsn, mid) do { \
51 if (_ctl) { \
52 atomic_add_int(&((net)->ref_count), 1); \
53 memset(_ctl, 0, sizeof(struct sctp_queued_to_read)); \
54 (_ctl)->sinfo_stream = sid; \
55 TAILQ_INIT(&_ctl->reasm); \
56 (_ctl)->top_fsn = tfsn; \
57 (_ctl)->mid = mid; \
58 (_ctl)->sinfo_flags = (flags << 8); \
59 (_ctl)->sinfo_ppid = ppid; \
60 (_ctl)->sinfo_context = context; \
61 (_ctl)->fsn_included = 0xffffffff; \
62 (_ctl)->sinfo_tsn = tsn; \
63 (_ctl)->sinfo_cumtsn = tsn; \
64 (_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
65 (_ctl)->whoFrom = net; \
66 (_ctl)->data = dm; \
67 (_ctl)->stcb = (in_it); \
68 (_ctl)->port_from = (in_it)->rport; \
69 if ((in_it)->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { \
70 (_ctl)->do_not_ref_stcb = 1; \
71 }\
72 } \
73 } while (0)
74
75
76
77 struct mbuf *
78 sctp_build_ctl_nchunk(struct sctp_inpcb *inp,
79 struct sctp_sndrcvinfo *sinfo);
80
81 void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *);
82
83 uint32_t
84 sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc);
85
86 void
87 sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack,
88 uint32_t rwnd, int *abort_now, int ecne_seen);
89
90 void
91 sctp_handle_sack(struct mbuf *m, int offset_seg, int offset_dup,
92 struct sctp_tcb *stcb,
93 uint16_t num_seg, uint16_t num_nr_seg, uint16_t num_dup,
94 int *abort_now, uint8_t flags,
95 uint32_t cum_ack, uint32_t rwnd, int ecne_seen);
96
97 /* draft-ietf-tsvwg-usctp */
98 void
99 sctp_handle_forward_tsn(struct sctp_tcb *,
100 struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
101
102 struct sctp_tmit_chunk *sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
103
104 void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
105
106 void
107 sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *, int *);
108
109 int
110 sctp_process_data(struct mbuf **, int, int *, int,
111 struct sctp_inpcb *, struct sctp_tcb *,
112 struct sctp_nets *, uint32_t *);
113
114 void sctp_slide_mapping_arrays(struct sctp_tcb *stcb);
115
116 void sctp_sack_check(struct sctp_tcb *, int);
117
118 #endif
119 #endif
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