sys/netinet/sctp_indata.h

   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("$FreeBSD$");
  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 /* draft-ietf-tsvwg-usctp */
 103 void
 104 sctp_handle_forward_tsn(struct sctp_tcb *,
 105     struct sctp_forward_tsn_chunk *, int *, struct mbuf *, int);
 106
 107 struct sctp_tmit_chunk *
 108                 sctp_try_advance_peer_ack_point(struct sctp_tcb *, struct sctp_association *);
 109
 110 void sctp_service_queues(struct sctp_tcb *, struct sctp_association *);
 111
 112 void
 113 sctp_update_acked(struct sctp_tcb *, struct sctp_shutdown_chunk *,
 114     struct sctp_nets *, int *);
 115
 116 int
 117 sctp_process_data(struct mbuf **, int, int *, int, struct sctphdr *,
 118     struct sctp_inpcb *, struct sctp_tcb *,
 119     struct sctp_nets *, uint32_t *);
 120
 121 void sctp_sack_check(struct sctp_tcb *, int, int, int *);
 122
 123 #endif
 124 #endif