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  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions are met:
    6  *
    7  * a) Redistributions of source code must retain the above copyright notice,
    8  *   this list of conditions and the following disclaimer.
    9  *
   10  * b) Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in
   12  *   the documentation and/or other materials provided with the distribution.
   13  *
   14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   15  *    contributors may be used to endorse or promote products derived
   16  *    from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   28  * THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 /* $KAME: sctp_indata.h,v 1.9 2005/03/06 16:04:17 itojun Exp $   */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/7.3/sys/netinet/sctp_indata.h 188532 2009-02-12 18:50:27Z rrs $");
   35 
   36 #ifndef __sctp_indata_h__
   37 #define __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 stream_no,
   46     uint16_t stream_seq, uint8_t flags,
   47     struct mbuf *dm);
   48 
   49 
   50 #define sctp_build_readq_entry_mac(_ctl, in_it, a, net, tsn, ppid, context, stream_no, stream_seq, flags, dm) do { \
   51         if (_ctl) { \
   52                 atomic_add_int(&((net)->ref_count), 1); \
   53                 (_ctl)->sinfo_stream = stream_no; \
   54                 (_ctl)->sinfo_ssn = stream_seq; \
   55                 (_ctl)->sinfo_flags = (flags << 8); \
   56                 (_ctl)->sinfo_ppid = ppid; \
   57                 (_ctl)->sinfo_context = a; \
   58                 (_ctl)->sinfo_timetolive = 0; \
   59                 (_ctl)->sinfo_tsn = tsn; \
   60                 (_ctl)->sinfo_cumtsn = tsn; \
   61                 (_ctl)->sinfo_assoc_id = sctp_get_associd((in_it)); \
   62                 (_ctl)->length = 0; \
   63                 (_ctl)->held_length = 0; \
   64                 (_ctl)->whoFrom = net; \
   65                 (_ctl)->data = dm; \
   66                 (_ctl)->tail_mbuf = NULL; \
   67                 (_ctl)->aux_data = NULL; \
   68                 (_ctl)->stcb = (in_it); \
   69                 (_ctl)->port_from = (in_it)->rport; \
   70                 (_ctl)->spec_flags = 0; \
   71                 (_ctl)->do_not_ref_stcb = 0; \
   72                 (_ctl)->end_added = 0; \
   73                 (_ctl)->pdapi_aborted = 0; \
   74                 (_ctl)->some_taken = 0; \
   75         } \
   76 } while (0)
   77 
   78 
   79 
   80 struct mbuf *
   81 sctp_build_ctl_nchunk(struct sctp_inpcb *inp,
   82     struct sctp_sndrcvinfo *sinfo);
   83 
   84 char *
   85 sctp_build_ctl_cchunk(struct sctp_inpcb *inp,
   86     int *control_len,
   87     struct sctp_sndrcvinfo *sinfo);
   88 
   89 void sctp_set_rwnd(struct sctp_tcb *, struct sctp_association *);
   90 
   91 uint32_t
   92 sctp_calc_rwnd(struct sctp_tcb *stcb, struct sctp_association *asoc);
   93 
   94 void
   95 sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack,
   96     uint32_t rwnd, int nonce_sum_flag, int *abort_now);
   97 
   98 void
   99 sctp_handle_sack(struct mbuf *m, int offset, struct sctp_sack_chunk *, struct sctp_tcb *,
  100     struct sctp_nets *, int *, int, uint32_t);
  101 
  102 /* EY does "exactly" the same as sctp_express_handle_sack */
  103 void
  104 sctp_express_handle_nr_sack(struct sctp_tcb *stcb, uint32_t cumack,
  105     uint32_t rwnd, int nonce_sum_flag, int *abort_now);
  106 
  107 /* EY nr_sack version of sctp_handle_sack */
  108 void
  109 sctp_handle_nr_sack(struct mbuf *m, int offset, struct sctp_nr_sack_chunk *, struct sctp_tcb *,
  110     struct sctp_nets *, int *, int, uint32_t);
  111 
  112 /* draft-ietf-tsvwg-usctp */
  113 void
  114 sctp_handle_forward_tsn(struct sctp_tcb *,
  115     struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
  116 
  117 struct sctp_tmit_chunk *
  118                 sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
  119 
  120 void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
  121 
  122 void
  123 sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *,
  124     struct sctp_nets *, int *);
  125 
  126 int
  127 sctp_process_data(struct mbuf **, int, int *, int, struct sctphdr *,
  128     struct sctp_inpcb *, struct sctp_tcb *,
  129     struct sctp_nets *, uint32_t *);
  130 
  131 void sctp_sack_check(struct sctp_tcb *, int, int, int *);
  132 
  133 #endif
  134 #endif

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