The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_indata.h

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    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: releng/12.0/sys/netinet/sctp_indata.h 336511 2018-07-19 20:16:33Z tuexen $");
   37 
   38 #ifndef _NETINET_SCTP_INDATA_H_
   39 #define _NETINET_SCTP_INDATA_H_
   40 
   41 #if defined(_KERNEL) || defined(__Userspace__)
   42 
   43 struct sctp_queued_to_read *
   44 sctp_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 
   52 #define sctp_build_readq_entry_mac(_ctl, in_it, context, net, tsn, ppid, sid, flags, dm, tfsn, mid) do { \
   53         if (_ctl) { \
   54                 atomic_add_int(&((net)->ref_count), 1); \
   55                 memset(_ctl, 0, sizeof(struct sctp_queued_to_read)); \
   56                 (_ctl)->sinfo_stream = sid; \
   57                 TAILQ_INIT(&_ctl->reasm); \
   58                 (_ctl)->top_fsn = tfsn; \
   59                 (_ctl)->mid = mid; \
   60                 (_ctl)->sinfo_flags = (flags << 8); \
   61                 (_ctl)->sinfo_ppid = ppid; \
   62                 (_ctl)->sinfo_context = context; \
   63                 (_ctl)->fsn_included = 0xffffffff; \
   64                 (_ctl)->top_fsn = 0xffffffff; \
   65                 (_ctl)->sinfo_tsn = tsn; \
   66                 (_ctl)->sinfo_cumtsn = tsn; \
   67                 (_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
   68                 (_ctl)->whoFrom = net; \
   69                 (_ctl)->data = dm; \
   70                 (_ctl)->stcb = (in_it); \
   71                 (_ctl)->port_from = (in_it)->rport; \
   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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