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 40 struct sctp_queued_to_read * 41 sctp_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 73 struct mbuf * 74 sctp_build_ctl_nchunk(struct sctp_inpcb *inp, 75 struct sctp_sndrcvinfo *sinfo); 76 77 void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *); 78 79 uint32_t 80 sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc); 81 82 void 83 sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack, 84 uint32_t rwnd, int *abort_now, int ecne_seen); 85 86 void 87 sctp_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 */ 94 void 95 sctp_handle_forward_tsn(struct sctp_tcb *, 96 struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int); 97 98 struct sctp_tmit_chunk *sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *); 99 100 void sctp_service_queues(struct sctp_tcb *, struct sctp_association *); 101 102 void 103 sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *, int *); 104 105 int 106 sctp_process_data(struct mbuf **, int, int *, int, 107 struct sctp_inpcb *, struct sctp_tcb *, 108 struct sctp_nets *, uint32_t *); 109 110 void sctp_slide_mapping_arrays(struct sctp_tcb *stcb); 111 112 void sctp_sack_check(struct sctp_tcb *, int); 113 114 #endif 115 #endif 116