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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2001-2008, 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: releng/8.4/sys/netinet/sctp_structs.h 248019 2013-03-08 01:24:00Z tuexen $");
   35 
   36 #ifndef _NETINET_SCTP_STRUCTS_H_
   37 #define _NETINET_SCTP_STRUCTS_H_
   38 
   39 #include <netinet/sctp_os.h>
   40 #include <netinet/sctp_header.h>
   41 #include <netinet/sctp_auth.h>
   42 
   43 struct sctp_timer {
   44         sctp_os_timer_t timer;
   45 
   46         int type;
   47         /*
   48          * Depending on the timer type these will be setup and cast with the
   49          * appropriate entity.
   50          */
   51         void *ep;
   52         void *tcb;
   53         void *net;
   54         void *vnet;
   55 
   56         /* for sanity checking */
   57         void *self;
   58         uint32_t ticks;
   59         uint32_t stopped_from;
   60 };
   61 
   62 
   63 struct sctp_foo_stuff {
   64         struct sctp_inpcb *inp;
   65         uint32_t lineno;
   66         uint32_t ticks;
   67         int updown;
   68 };
   69 
   70 
   71 /*
   72  * This is the information we track on each interface that we know about from
   73  * the distant end.
   74  */
   75 TAILQ_HEAD(sctpnetlisthead, sctp_nets);
   76 
   77 struct sctp_stream_reset_list {
   78         TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
   79         uint32_t tsn;
   80         uint32_t number_entries;
   81         uint16_t list_of_streams[];
   82 };
   83 
   84 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list);
   85 
   86 /*
   87  * Users of the iterator need to malloc a iterator with a call to
   88  * sctp_initiate_iterator(inp_func, assoc_func, inp_func,  pcb_flags, pcb_features,
   89  *     asoc_state, void-ptr-arg, uint32-arg, end_func, inp);
   90  *
   91  * Use the following two defines if you don't care what pcb flags are on the EP
   92  * and/or you don't care what state the association is in.
   93  *
   94  * Note that if you specify an INP as the last argument then ONLY each
   95  * association of that single INP will be executed upon. Note that the pcb
   96  * flags STILL apply so if the inp you specify has different pcb_flags then
   97  * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to
   98  * assure the inp you specify gets treated.
   99  */
  100 #define SCTP_PCB_ANY_FLAGS      0x00000000
  101 #define SCTP_PCB_ANY_FEATURES   0x00000000
  102 #define SCTP_ASOC_ANY_STATE     0x00000000
  103 
  104 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr,
  105          uint32_t val);
  106 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val);
  107 typedef void (*end_func) (void *ptr, uint32_t val);
  108 
  109 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
  110 /* whats on the mcore control struct */
  111 struct sctp_mcore_queue {
  112         TAILQ_ENTRY(sctp_mcore_queue) next;
  113         struct vnet *vn;
  114         struct mbuf *m;
  115         int off;
  116         int v6;
  117 };
  118 
  119 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue);
  120 
  121 struct sctp_mcore_ctrl {
  122         SCTP_PROCESS_STRUCT thread_proc;
  123         struct sctp_mcore_qhead que;
  124         struct mtx core_mtx;
  125         struct mtx que_mtx;
  126         int running;
  127         int cpuid;
  128 };
  129 
  130 
  131 #endif
  132 
  133 
  134 struct sctp_iterator {
  135         TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr;
  136         struct vnet *vn;
  137         struct sctp_timer tmr;
  138         struct sctp_inpcb *inp; /* current endpoint */
  139         struct sctp_tcb *stcb;  /* current* assoc */
  140         struct sctp_inpcb *next_inp;    /* special hook to skip to */
  141         asoc_func function_assoc;       /* per assoc function */
  142         inp_func function_inp;  /* per endpoint function */
  143         inp_func function_inp_end;      /* end INP function */
  144         end_func function_atend;/* iterator completion function */
  145         void *pointer;          /* pointer for apply func to use */
  146         uint32_t val;           /* value for apply func to use */
  147         uint32_t pcb_flags;     /* endpoint flags being checked */
  148         uint32_t pcb_features;  /* endpoint features being checked */
  149         uint32_t asoc_state;    /* assoc state being checked */
  150         uint32_t iterator_flags;
  151         uint8_t no_chunk_output;
  152         uint8_t done_current_ep;
  153 };
  154 
  155 /* iterator_flags values */
  156 #define SCTP_ITERATOR_DO_ALL_INP        0x00000001
  157 #define SCTP_ITERATOR_DO_SINGLE_INP     0x00000002
  158 
  159 
  160 TAILQ_HEAD(sctpiterators, sctp_iterator);
  161 
  162 struct sctp_copy_all {
  163         struct sctp_inpcb *inp; /* ep */
  164         struct mbuf *m;
  165         struct sctp_sndrcvinfo sndrcv;
  166         int sndlen;
  167         int cnt_sent;
  168         int cnt_failed;
  169 };
  170 
  171 struct sctp_asconf_iterator {
  172         struct sctpladdr list_of_work;
  173         int cnt;
  174 };
  175 
  176 struct iterator_control {
  177         struct mtx ipi_iterator_wq_mtx;
  178         struct mtx it_mtx;
  179         SCTP_PROCESS_STRUCT thread_proc;
  180         struct sctpiterators iteratorhead;
  181         struct sctp_iterator *cur_it;
  182         uint32_t iterator_running;
  183         uint32_t iterator_flags;
  184 };
  185 
  186 #define SCTP_ITERATOR_STOP_CUR_IT       0x00000004
  187 #define SCTP_ITERATOR_STOP_CUR_INP      0x00000008
  188 
  189 struct sctp_net_route {
  190         sctp_rtentry_t *ro_rt;
  191         void *ro_lle;
  192         union sctp_sockstore _l_addr;   /* remote peer addr */
  193         struct sctp_ifa *_s_addr;       /* our selected src addr */
  194 };
  195 
  196 struct htcp {
  197         uint16_t alpha;         /* Fixed point arith, << 7 */
  198         uint8_t beta;           /* Fixed point arith, << 7 */
  199         uint8_t modeswitch;     /* Delay modeswitch until we had at least one
  200                                  * congestion event */
  201         uint32_t last_cong;     /* Time since last congestion event end */
  202         uint32_t undo_last_cong;
  203         uint16_t bytes_acked;
  204         uint32_t bytecount;
  205         uint32_t minRTT;
  206         uint32_t maxRTT;
  207 
  208         uint32_t undo_maxRTT;
  209         uint32_t undo_old_maxB;
  210 
  211         /* Bandwidth estimation */
  212         uint32_t minB;
  213         uint32_t maxB;
  214         uint32_t old_maxB;
  215         uint32_t Bi;
  216         uint32_t lasttime;
  217 };
  218 
  219 struct rtcc_cc {
  220         struct timeval tls;     /* The time we started the sending  */
  221         uint64_t lbw;           /* Our last estimated bw */
  222         uint64_t lbw_rtt;       /* RTT at bw estimate */
  223         uint64_t bw_bytes;      /* The total bytes since this sending began */
  224         uint64_t bw_tot_time;   /* The total time since sending began */
  225         uint64_t new_tot_time;  /* temp holding the new value */
  226         uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */
  227         uint32_t cwnd_at_bw_set;/* Cwnd at last bw saved - lbw */
  228         uint32_t vol_reduce;    /* cnt of voluntary reductions */
  229         uint16_t steady_step;   /* The number required to be in steady state */
  230         uint16_t step_cnt;      /* The current number */
  231         uint8_t ret_from_eq;    /* When all things are equal what do I return
  232                                  * 0/1 - 1 no cc advance */
  233         uint8_t use_dccc_ecn;   /* Flag to enable DCCC ECN */
  234         uint8_t tls_needs_set;  /* Flag to indicate we need to set tls 0 or 1
  235                                  * means set at send 2 not */
  236         uint8_t last_step_state;/* Last state if steady state stepdown is on */
  237         uint8_t rtt_set_this_sack;      /* Flag saying this sack had RTT calc
  238                                          * on it */
  239         uint8_t last_inst_ind;  /* Last saved inst indication */
  240 };
  241 
  242 
  243 struct sctp_nets {
  244         TAILQ_ENTRY(sctp_nets) sctp_next;       /* next link */
  245 
  246         /*
  247          * Things on the top half may be able to be split into a common
  248          * structure shared by all.
  249          */
  250         struct sctp_timer pmtu_timer;
  251         struct sctp_timer hb_timer;
  252 
  253         /*
  254          * The following two in combination equate to a route entry for v6
  255          * or v4.
  256          */
  257         struct sctp_net_route ro;
  258 
  259         /* mtu discovered so far */
  260         uint32_t mtu;
  261         uint32_t ssthresh;      /* not sure about this one for split */
  262         uint32_t last_cwr_tsn;
  263         uint32_t cwr_window_tsn;
  264         uint32_t ecn_ce_pkt_cnt;
  265         uint32_t lost_cnt;
  266         /* smoothed average things for RTT and RTO itself */
  267         int lastsa;
  268         int lastsv;
  269         uint64_t rtt;           /* last measured rtt value in us */
  270         unsigned int RTO;
  271 
  272         /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
  273         struct sctp_timer rxt_timer;
  274 
  275         /* last time in seconds I sent to it */
  276         struct timeval last_sent_time;
  277         union cc_control_data {
  278                 struct htcp htcp_ca;    /* JRS - struct used in HTCP algorithm */
  279                 struct rtcc_cc rtcc;    /* rtcc module cc stuff  */
  280         }               cc_mod;
  281         int ref_count;
  282 
  283         /* Congestion stats per destination */
  284         /*
  285          * flight size variables and such, sorry Vern, I could not avoid
  286          * this if I wanted performance :>
  287          */
  288         uint32_t flight_size;
  289         uint32_t cwnd;          /* actual cwnd */
  290         uint32_t prev_cwnd;     /* cwnd before any processing */
  291         uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new
  292                                  * window */
  293         uint32_t partial_bytes_acked;   /* in CA tracks when to incr a MTU */
  294         /* tracking variables to avoid the aloc/free in sack processing */
  295         unsigned int net_ack;
  296         unsigned int net_ack2;
  297 
  298         /*
  299          * JRS - 5/8/07 - Variable to track last time a destination was
  300          * active for CMT PF
  301          */
  302         uint32_t last_active;
  303 
  304         /*
  305          * CMT variables (iyengar@cis.udel.edu)
  306          */
  307         uint32_t this_sack_highest_newack;      /* tracks highest TSN newly
  308                                                  * acked for a given dest in
  309                                                  * the current SACK. Used in
  310                                                  * SFR and HTNA algos */
  311         uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
  312                                  * pseudo-cumack for this destination */
  313         uint32_t rtx_pseudo_cumack;     /* CMT CUC algorithm. Maintains next
  314                                          * expected pseudo-cumack for this
  315                                          * destination */
  316 
  317         /* CMT fast recovery variables */
  318         uint32_t fast_recovery_tsn;
  319         uint32_t heartbeat_random1;
  320         uint32_t heartbeat_random2;
  321 #ifdef INET6
  322         uint32_t flowlabel;
  323 #endif
  324         uint8_t dscp;
  325 
  326         struct timeval start_time;      /* time when this net was created */
  327         uint32_t marked_retrans;/* number or DATA chunks marked for timer
  328                                  * based retransmissions */
  329         uint32_t marked_fastretrans;
  330         uint32_t heart_beat_delay;      /* Heart Beat delay in ms */
  331 
  332         /* if this guy is ok or not ... status */
  333         uint16_t dest_state;
  334         /* number of timeouts to consider the destination unreachable */
  335         uint16_t failure_threshold;
  336         /* number of timeouts to consider the destination potentially failed */
  337         uint16_t pf_threshold;
  338         /* error stats on the destination */
  339         uint16_t error_count;
  340         /* UDP port number in case of UDP tunneling */
  341         uint16_t port;
  342 
  343         uint8_t fast_retran_loss_recovery;
  344         uint8_t will_exit_fast_recovery;
  345         /* Flags that probably can be combined into dest_state */
  346         uint8_t fast_retran_ip; /* fast retransmit in progress */
  347         uint8_t hb_responded;
  348         uint8_t saw_newack;     /* CMT's SFR algorithm flag */
  349         uint8_t src_addr_selected;      /* if we split we move */
  350         uint8_t indx_of_eligible_next_to_use;
  351         uint8_t addr_is_local;  /* its a local address (if known) could move
  352                                  * in split */
  353 
  354         /*
  355          * CMT variables (iyengar@cis.udel.edu)
  356          */
  357         uint8_t find_pseudo_cumack;     /* CMT CUC algorithm. Flag used to
  358                                          * find a new pseudocumack. This flag
  359                                          * is set after a new pseudo-cumack
  360                                          * has been received and indicates
  361                                          * that the sender should find the
  362                                          * next pseudo-cumack expected for
  363                                          * this destination */
  364         uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
  365                                          * find a new rtx-pseudocumack. This
  366                                          * flag is set after a new
  367                                          * rtx-pseudo-cumack has been received
  368                                          * and indicates that the sender
  369                                          * should find the next
  370                                          * rtx-pseudo-cumack expected for this
  371                                          * destination */
  372         uint8_t new_pseudo_cumack;      /* CMT CUC algorithm. Flag used to
  373                                          * indicate if a new pseudo-cumack or
  374                                          * rtx-pseudo-cumack has been received */
  375         uint8_t window_probe;   /* Doing a window probe? */
  376         uint8_t RTO_measured;   /* Have we done the first measure */
  377         uint8_t last_hs_used;   /* index into the last HS table entry we used */
  378         uint8_t lan_type;
  379         uint8_t rto_needed;
  380         uint32_t flowid;
  381 #ifdef INVARIANTS
  382         uint8_t flowidset;
  383 #endif
  384 };
  385 
  386 
  387 struct sctp_data_chunkrec {
  388         uint32_t TSN_seq;       /* the TSN of this transmit */
  389         uint16_t stream_seq;    /* the stream sequence number of this transmit */
  390         uint16_t stream_number; /* the stream number of this guy */
  391         uint32_t payloadtype;
  392         uint32_t context;       /* from send */
  393         uint32_t cwnd_at_send;
  394         /*
  395          * part of the Highest sacked algorithm to be able to stroke counts
  396          * on ones that are FR'd.
  397          */
  398         uint32_t fast_retran_tsn;       /* sending_seq at the time of FR */
  399         struct timeval timetodrop;      /* time we drop it from queue */
  400         uint8_t doing_fast_retransmit;
  401         uint8_t rcv_flags;      /* flags pulled from data chunk on inbound for
  402                                  * outbound holds sending flags for PR-SCTP. */
  403         uint8_t state_flags;
  404         uint8_t chunk_was_revoked;
  405         uint8_t fwd_tsn_cnt;
  406 };
  407 
  408 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
  409 
  410 /* The lower byte is used to enumerate PR_SCTP policies */
  411 #define CHUNK_FLAGS_PR_SCTP_TTL         SCTP_PR_SCTP_TTL
  412 #define CHUNK_FLAGS_PR_SCTP_BUF         SCTP_PR_SCTP_BUF
  413 #define CHUNK_FLAGS_PR_SCTP_RTX         SCTP_PR_SCTP_RTX
  414 
  415 /* The upper byte is used as a bit mask */
  416 #define CHUNK_FLAGS_FRAGMENT_OK         0x0100
  417 
  418 struct chk_id {
  419         uint16_t id;
  420         uint16_t can_take_data;
  421 };
  422 
  423 
  424 struct sctp_tmit_chunk {
  425         union {
  426                 struct sctp_data_chunkrec data;
  427                 struct chk_id chunk_id;
  428         }     rec;
  429         struct sctp_association *asoc;  /* bp to asoc this belongs to */
  430         struct timeval sent_rcv_time;   /* filled in if RTT being calculated */
  431         struct mbuf *data;      /* pointer to mbuf chain of data */
  432         struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
  433         struct sctp_nets *whoTo;
  434                   TAILQ_ENTRY(sctp_tmit_chunk) sctp_next;       /* next link */
  435         int32_t sent;           /* the send status */
  436         uint16_t snd_count;     /* number of times I sent */
  437         uint16_t flags;         /* flags, such as FRAGMENT_OK */
  438         uint16_t send_size;
  439         uint16_t book_size;
  440         uint16_t mbcnt;
  441         uint16_t auth_keyid;
  442         uint8_t holds_key_ref;  /* flag if auth keyid refcount is held */
  443         uint8_t pad_inplace;
  444         uint8_t do_rtt;
  445         uint8_t book_size_scale;
  446         uint8_t no_fr_allowed;
  447         uint8_t pr_sctp_on;
  448         uint8_t copy_by_ref;
  449         uint8_t window_probe;
  450 };
  451 
  452 /*
  453  * The first part of this structure MUST be the entire sinfo structure. Maybe
  454  * I should have made it a sub structure... we can circle back later and do
  455  * that if we want.
  456  */
  457 struct sctp_queued_to_read {    /* sinfo structure Pluse more */
  458         uint16_t sinfo_stream;  /* off the wire */
  459         uint16_t sinfo_ssn;     /* off the wire */
  460         uint16_t sinfo_flags;   /* SCTP_UNORDERED from wire use SCTP_EOF for
  461                                  * EOR */
  462         uint32_t sinfo_ppid;    /* off the wire */
  463         uint32_t sinfo_context; /* pick this up from assoc def context? */
  464         uint32_t sinfo_timetolive;      /* not used by kernel */
  465         uint32_t sinfo_tsn;     /* Use this in reassembly as first TSN */
  466         uint32_t sinfo_cumtsn;  /* Use this in reassembly as last TSN */
  467         sctp_assoc_t sinfo_assoc_id;    /* our assoc id */
  468         /* Non sinfo stuff */
  469         uint32_t length;        /* length of data */
  470         uint32_t held_length;   /* length held in sb */
  471         struct sctp_nets *whoFrom;      /* where it came from */
  472         struct mbuf *data;      /* front of the mbuf chain of data with
  473                                  * PKT_HDR */
  474         struct mbuf *tail_mbuf; /* used for multi-part data */
  475         struct mbuf *aux_data;  /* used to hold/cache  control if o/s does not
  476                                  * take it from us */
  477         struct sctp_tcb *stcb;  /* assoc, used for window update */
  478                  TAILQ_ENTRY(sctp_queued_to_read) next;
  479         uint16_t port_from;
  480         uint16_t spec_flags;    /* Flags to hold the notification field */
  481         uint8_t do_not_ref_stcb;
  482         uint8_t end_added;
  483         uint8_t pdapi_aborted;
  484         uint8_t some_taken;
  485 };
  486 
  487 /* This data structure will be on the outbound
  488  * stream queues. Data will be pulled off from
  489  * the front of the mbuf data and chunk-ified
  490  * by the output routines. We will custom
  491  * fit every chunk we pull to the send/sent
  492  * queue to make up the next full packet
  493  * if we can. An entry cannot be removed
  494  * from the stream_out queue until
  495  * the msg_is_complete flag is set. This
  496  * means at times data/tail_mbuf MIGHT
  497  * be NULL.. If that occurs it happens
  498  * for one of two reasons. Either the user
  499  * is blocked on a send() call and has not
  500  * awoken to copy more data down... OR
  501  * the user is in the explict MSG_EOR mode
  502  * and wrote some data, but has not completed
  503  * sending.
  504  */
  505 struct sctp_stream_queue_pending {
  506         struct mbuf *data;
  507         struct mbuf *tail_mbuf;
  508         struct timeval ts;
  509         struct sctp_nets *net;
  510                   TAILQ_ENTRY(sctp_stream_queue_pending) next;
  511                   TAILQ_ENTRY(sctp_stream_queue_pending) ss_next;
  512         uint32_t length;
  513         uint32_t timetolive;
  514         uint32_t ppid;
  515         uint32_t context;
  516         uint16_t sinfo_flags;
  517         uint16_t stream;
  518         uint16_t act_flags;
  519         uint16_t auth_keyid;
  520         uint8_t holds_key_ref;
  521         uint8_t msg_is_complete;
  522         uint8_t some_taken;
  523         uint8_t pr_sctp_on;
  524         uint8_t sender_all_done;
  525         uint8_t put_last_out;
  526         uint8_t discard_rest;
  527 };
  528 
  529 /*
  530  * this struct contains info that is used to track inbound stream data and
  531  * help with ordering.
  532  */
  533 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
  534 struct sctp_stream_in {
  535         struct sctp_readhead inqueue;
  536         uint16_t stream_no;
  537         uint16_t last_sequence_delivered;       /* used for re-order */
  538         uint8_t delivery_started;
  539 };
  540 
  541 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
  542 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending);
  543 
  544 /* Round-robin schedulers */
  545 struct ss_rr {
  546         /* next link in wheel */
  547         TAILQ_ENTRY(sctp_stream_out) next_spoke;
  548 };
  549 
  550 /* Priority scheduler */
  551 struct ss_prio {
  552         /* next link in wheel */
  553         TAILQ_ENTRY(sctp_stream_out) next_spoke;
  554         /* priority id */
  555         uint16_t priority;
  556 };
  557 
  558 /* Fair Bandwidth scheduler */
  559 struct ss_fb {
  560         /* next link in wheel */
  561         TAILQ_ENTRY(sctp_stream_out) next_spoke;
  562         /* stores message size */
  563         int32_t rounds;
  564 };
  565 
  566 /*
  567  * This union holds all data necessary for
  568  * different stream schedulers.
  569  */
  570 union scheduling_data {
  571         struct sctpwheel_listhead out_wheel;
  572         struct sctplist_listhead out_list;
  573 };
  574 
  575 /*
  576  * This union holds all parameters per stream
  577  * necessary for different stream schedulers.
  578  */
  579 union scheduling_parameters {
  580         struct ss_rr rr;
  581         struct ss_prio prio;
  582         struct ss_fb fb;
  583 };
  584 
  585 /* This struct is used to track the traffic on outbound streams */
  586 struct sctp_stream_out {
  587         struct sctp_streamhead outqueue;
  588         union scheduling_parameters ss_params;
  589         uint32_t chunks_on_queues;
  590         uint16_t stream_no;
  591         uint16_t next_sequence_send;    /* next one I expect to send out */
  592         uint8_t last_msg_incomplete;
  593 };
  594 
  595 /* used to keep track of the addresses yet to try to add/delete */
  596 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
  597 struct sctp_asconf_addr {
  598         TAILQ_ENTRY(sctp_asconf_addr) next;
  599         struct sctp_asconf_addr_param ap;
  600         struct sctp_ifa *ifa;   /* save the ifa for add/del ip */
  601         uint8_t sent;           /* has this been sent yet? */
  602         uint8_t special_del;    /* not to be used in lookup */
  603 };
  604 
  605 struct sctp_scoping {
  606         uint8_t ipv4_addr_legal;
  607         uint8_t ipv6_addr_legal;
  608         uint8_t loopback_scope;
  609         uint8_t ipv4_local_scope;
  610         uint8_t local_scope;
  611         uint8_t site_scope;
  612 };
  613 
  614 #define SCTP_TSN_LOG_SIZE 40
  615 
  616 struct sctp_tsn_log {
  617         void *stcb;
  618         uint32_t tsn;
  619         uint16_t strm;
  620         uint16_t seq;
  621         uint16_t sz;
  622         uint16_t flgs;
  623         uint16_t in_pos;
  624         uint16_t in_out;
  625 };
  626 
  627 #define SCTP_FS_SPEC_LOG_SIZE 200
  628 struct sctp_fs_spec_log {
  629         uint32_t sent;
  630         uint32_t total_flight;
  631         uint32_t tsn;
  632         uint16_t book;
  633         uint8_t incr;
  634         uint8_t decr;
  635 };
  636 
  637 /* This struct is here to cut out the compatiabilty
  638  * pad that bulks up both the inp and stcb. The non
  639  * pad portion MUST stay in complete sync with
  640  * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
  641  * this must be done here too.
  642  */
  643 struct sctp_nonpad_sndrcvinfo {
  644         uint16_t sinfo_stream;
  645         uint16_t sinfo_ssn;
  646         uint16_t sinfo_flags;
  647         uint32_t sinfo_ppid;
  648         uint32_t sinfo_context;
  649         uint32_t sinfo_timetolive;
  650         uint32_t sinfo_tsn;
  651         uint32_t sinfo_cumtsn;
  652         sctp_assoc_t sinfo_assoc_id;
  653         uint16_t sinfo_keynumber;
  654         uint16_t sinfo_keynumber_valid;
  655 };
  656 
  657 /*
  658  * JRS - Structure to hold function pointers to the functions responsible
  659  * for congestion control.
  660  */
  661 
  662 struct sctp_cc_functions {
  663         void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net);
  664         void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb,
  665                  struct sctp_association *asoc,
  666                  int accum_moved, int reneged_all, int will_exit);
  667         void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net);
  668         void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb,
  669                  struct sctp_association *asoc);
  670         void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb,
  671                  struct sctp_nets *net);
  672         void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb,
  673                  struct sctp_nets *net, int in_window, int num_pkt_lost);
  674         void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb,
  675                  struct sctp_nets *net, struct sctp_pktdrop_chunk *cp,
  676                  uint32_t * bottle_bw, uint32_t * on_queue);
  677         void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb,
  678                  struct sctp_nets *net, int burst_limit);
  679         void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb,
  680                  struct sctp_nets *net);
  681         void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net,
  682                  struct sctp_tmit_chunk *);
  683         void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb,
  684                  struct sctp_nets *net);
  685         void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb,
  686                  struct sctp_nets *net);
  687         int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *);
  688         void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *);
  689 };
  690 
  691 /*
  692  * RS - Structure to hold function pointers to the functions responsible
  693  * for stream scheduling.
  694  */
  695 struct sctp_ss_functions {
  696         void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  697                  int holds_lock);
  698         void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  699                  int clear_values, int holds_lock);
  700         void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq);
  701         void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  702                  struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
  703         int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc);
  704         void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  705                  struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
  706         struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb,
  707                             struct sctp_nets *net, struct sctp_association *asoc);
  708         void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net,
  709                  struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much);
  710         void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net,
  711                  struct sctp_association *asoc);
  712         int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  713                 struct sctp_stream_out *strq, uint16_t * value);
  714         int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
  715                 struct sctp_stream_out *strq, uint16_t value);
  716 };
  717 
  718 /* used to save ASCONF chunks for retransmission */
  719 TAILQ_HEAD(sctp_asconf_head, sctp_asconf);
  720 struct sctp_asconf {
  721         TAILQ_ENTRY(sctp_asconf) next;
  722         uint32_t serial_number;
  723         uint16_t snd_count;
  724         struct mbuf *data;
  725         uint16_t len;
  726 };
  727 
  728 /* used to save ASCONF-ACK chunks for retransmission */
  729 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack);
  730 struct sctp_asconf_ack {
  731         TAILQ_ENTRY(sctp_asconf_ack) next;
  732         uint32_t serial_number;
  733         struct sctp_nets *last_sent_to;
  734         struct mbuf *data;
  735         uint16_t len;
  736 };
  737 
  738 /*
  739  * Here we have information about each individual association that we track.
  740  * We probably in production would be more dynamic. But for ease of
  741  * implementation we will have a fixed array that we hunt for in a linear
  742  * fashion.
  743  */
  744 struct sctp_association {
  745         /* association state */
  746         int state;
  747 
  748         /* queue of pending addrs to add/delete */
  749         struct sctp_asconf_addrhead asconf_queue;
  750 
  751         struct timeval time_entered;    /* time we entered state */
  752         struct timeval time_last_rcvd;
  753         struct timeval time_last_sent;
  754         struct timeval time_last_sat_advance;
  755         struct sctp_nonpad_sndrcvinfo def_send;
  756 
  757         /* timers and such */
  758         struct sctp_timer dack_timer;   /* Delayed ack timer */
  759         struct sctp_timer asconf_timer; /* asconf */
  760         struct sctp_timer strreset_timer;       /* stream reset */
  761         struct sctp_timer shut_guard_timer;     /* shutdown guard */
  762         struct sctp_timer autoclose_timer;      /* automatic close timer */
  763         struct sctp_timer delayed_event_timer;  /* timer for delayed events */
  764         struct sctp_timer delete_prim_timer;    /* deleting primary dst */
  765 
  766         /* list of restricted local addresses */
  767         struct sctpladdr sctp_restricted_addrs;
  768 
  769         /* last local address pending deletion (waiting for an address add) */
  770         struct sctp_ifa *asconf_addr_del_pending;
  771         /* Deleted primary destination (used to stop timer) */
  772         struct sctp_nets *deleted_primary;
  773 
  774         struct sctpnetlisthead nets;    /* remote address list */
  775 
  776         /* Free chunk list */
  777         struct sctpchunk_listhead free_chunks;
  778 
  779         /* Control chunk queue */
  780         struct sctpchunk_listhead control_send_queue;
  781 
  782         /* ASCONF chunk queue */
  783         struct sctpchunk_listhead asconf_send_queue;
  784 
  785         /*
  786          * Once a TSN hits the wire it is moved to the sent_queue. We
  787          * maintain two counts here (don't know if any but retran_cnt is
  788          * needed). The idea is that the sent_queue_retran_cnt reflects how
  789          * many chunks have been marked for retranmission by either T3-rxt
  790          * or FR.
  791          */
  792         struct sctpchunk_listhead sent_queue;
  793         struct sctpchunk_listhead send_queue;
  794 
  795         /* re-assembly queue for fragmented chunks on the inbound path */
  796         struct sctpchunk_listhead reasmqueue;
  797 
  798         /* Scheduling queues */
  799         union scheduling_data ss_data;
  800 
  801         /*
  802          * This pointer will be set to NULL most of the time. But when we
  803          * have a fragmented message, where we could not get out all of the
  804          * message at the last send then this will point to the stream to go
  805          * get data from.
  806          */
  807         struct sctp_stream_out *locked_on_sending;
  808 
  809         /* If an iterator is looking at me, this is it */
  810         struct sctp_iterator *stcb_starting_point_for_iterator;
  811 
  812         /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
  813         struct sctp_asconf_ackhead asconf_ack_sent;
  814 
  815         /*
  816          * pointer to last stream reset queued to control queue by us with
  817          * requests.
  818          */
  819         struct sctp_tmit_chunk *str_reset;
  820         /*
  821          * if Source Address Selection happening, this will rotate through
  822          * the link list.
  823          */
  824         struct sctp_laddr *last_used_address;
  825 
  826         /* stream arrays */
  827         struct sctp_stream_in *strmin;
  828         struct sctp_stream_out *strmout;
  829         uint8_t *mapping_array;
  830         /* primary destination to use */
  831         struct sctp_nets *primary_destination;
  832         struct sctp_nets *alternate;    /* If primary is down or PF */
  833         /* For CMT */
  834         struct sctp_nets *last_net_cmt_send_started;
  835         /* last place I got a data chunk from */
  836         struct sctp_nets *last_data_chunk_from;
  837         /* last place I got a control from */
  838         struct sctp_nets *last_control_chunk_from;
  839 
  840         /* circular looking for output selection */
  841         struct sctp_stream_out *last_out_stream;
  842 
  843         /*
  844          * wait to the point the cum-ack passes req->send_reset_at_tsn for
  845          * any req on the list.
  846          */
  847         struct sctp_resethead resetHead;
  848 
  849         /* queue of chunks waiting to be sent into the local stack */
  850         struct sctp_readhead pending_reply_queue;
  851 
  852         /* JRS - the congestion control functions are in this struct */
  853         struct sctp_cc_functions cc_functions;
  854         /*
  855          * JRS - value to store the currently loaded congestion control
  856          * module
  857          */
  858         uint32_t congestion_control_module;
  859         /* RS - the stream scheduling functions are in this struct */
  860         struct sctp_ss_functions ss_functions;
  861         /* RS - value to store the currently loaded stream scheduling module */
  862         uint32_t stream_scheduling_module;
  863 
  864         uint32_t vrf_id;
  865 
  866         uint32_t cookie_preserve_req;
  867         /* ASCONF next seq I am sending out, inits at init-tsn */
  868         uint32_t asconf_seq_out;
  869         uint32_t asconf_seq_out_acked;
  870         /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
  871         uint32_t asconf_seq_in;
  872 
  873         /* next seq I am sending in str reset messages */
  874         uint32_t str_reset_seq_out;
  875         /* next seq I am expecting in str reset messages */
  876         uint32_t str_reset_seq_in;
  877 
  878         /* various verification tag information */
  879         uint32_t my_vtag;       /* The tag to be used. if assoc is re-initited
  880                                  * by remote end, and I have unlocked this
  881                                  * will be regenerated to a new random value. */
  882         uint32_t peer_vtag;     /* The peers last tag */
  883 
  884         uint32_t my_vtag_nonce;
  885         uint32_t peer_vtag_nonce;
  886 
  887         uint32_t assoc_id;
  888 
  889         /* This is the SCTP fragmentation threshold */
  890         uint32_t smallest_mtu;
  891 
  892         /*
  893          * Special hook for Fast retransmit, allows us to track the highest
  894          * TSN that is NEW in this SACK if gap ack blocks are present.
  895          */
  896         uint32_t this_sack_highest_gap;
  897 
  898         /*
  899          * The highest consecutive TSN that has been acked by peer on my
  900          * sends
  901          */
  902         uint32_t last_acked_seq;
  903 
  904         /* The next TSN that I will use in sending. */
  905         uint32_t sending_seq;
  906 
  907         /* Original seq number I used ??questionable to keep?? */
  908         uint32_t init_seq_number;
  909 
  910 
  911         /* The Advanced Peer Ack Point, as required by the PR-SCTP */
  912         /* (A1 in Section 4.2) */
  913         uint32_t advanced_peer_ack_point;
  914 
  915         /*
  916          * The highest consequetive TSN at the bottom of the mapping array
  917          * (for his sends).
  918          */
  919         uint32_t cumulative_tsn;
  920         /*
  921          * Used to track the mapping array and its offset bits. This MAY be
  922          * lower then cumulative_tsn.
  923          */
  924         uint32_t mapping_array_base_tsn;
  925         /*
  926          * used to track highest TSN we have received and is listed in the
  927          * mapping array.
  928          */
  929         uint32_t highest_tsn_inside_map;
  930 
  931         /* EY - new NR variables used for nr_sack based on mapping_array */
  932         uint8_t *nr_mapping_array;
  933         uint32_t highest_tsn_inside_nr_map;
  934 
  935         uint32_t fast_recovery_tsn;
  936         uint32_t sat_t3_recovery_tsn;
  937         uint32_t tsn_last_delivered;
  938         /*
  939          * For the pd-api we should re-write this a bit more efficent. We
  940          * could have multiple sctp_queued_to_read's that we are building at
  941          * once. Now we only do this when we get ready to deliver to the
  942          * socket buffer. Note that we depend on the fact that the struct is
  943          * "stuck" on the read queue until we finish all the pd-api.
  944          */
  945         struct sctp_queued_to_read *control_pdapi;
  946 
  947         uint32_t tsn_of_pdapi_last_delivered;
  948         uint32_t pdapi_ppid;
  949         uint32_t context;
  950         uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
  951         uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
  952         uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
  953 #ifdef SCTP_ASOCLOG_OF_TSNS
  954         /*
  955          * special log  - This adds considerable size to the asoc, but
  956          * provides a log that you can use to detect problems via kgdb.
  957          */
  958         struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
  959         struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
  960         uint32_t cumack_log[SCTP_TSN_LOG_SIZE];
  961         uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE];
  962         uint16_t tsn_in_at;
  963         uint16_t tsn_out_at;
  964         uint16_t tsn_in_wrapped;
  965         uint16_t tsn_out_wrapped;
  966         uint16_t cumack_log_at;
  967         uint16_t cumack_log_atsnt;
  968 #endif                          /* SCTP_ASOCLOG_OF_TSNS */
  969 #ifdef SCTP_FS_SPEC_LOG
  970         struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE];
  971         uint16_t fs_index;
  972 #endif
  973 
  974         /*
  975          * window state information and smallest MTU that I use to bound
  976          * segmentation
  977          */
  978         uint32_t peers_rwnd;
  979         uint32_t my_rwnd;
  980         uint32_t my_last_reported_rwnd;
  981         uint32_t sctp_frag_point;
  982 
  983         uint32_t total_output_queue_size;
  984 
  985         uint32_t sb_cc;         /* shadow of sb_cc */
  986         uint32_t sb_send_resv;  /* amount reserved on a send */
  987         uint32_t my_rwnd_control_len;   /* shadow of sb_mbcnt used for rwnd
  988                                          * control */
  989 #ifdef INET6
  990         uint32_t default_flowlabel;
  991 #endif
  992         uint32_t pr_sctp_cnt;
  993         int ctrl_queue_cnt;     /* could be removed  REM - NO IT CAN'T!! RRS */
  994         /*
  995          * All outbound datagrams queue into this list from the individual
  996          * stream queue. Here they get assigned a TSN and then await
  997          * sending. The stream seq comes when it is first put in the
  998          * individual str queue
  999          */
 1000         unsigned int stream_queue_cnt;
 1001         unsigned int send_queue_cnt;
 1002         unsigned int sent_queue_cnt;
 1003         unsigned int sent_queue_cnt_removeable;
 1004         /*
 1005          * Number on sent queue that are marked for retran until this value
 1006          * is 0 we only send one packet of retran'ed data.
 1007          */
 1008         unsigned int sent_queue_retran_cnt;
 1009 
 1010         unsigned int size_on_reasm_queue;
 1011         unsigned int cnt_on_reasm_queue;
 1012         unsigned int fwd_tsn_cnt;
 1013         /* amount of data (bytes) currently in flight (on all destinations) */
 1014         unsigned int total_flight;
 1015         /* Total book size in flight */
 1016         unsigned int total_flight_count;        /* count of chunks used with
 1017                                                  * book total */
 1018         /* count of destinaton nets and list of destination nets */
 1019         unsigned int numnets;
 1020 
 1021         /* Total error count on this association */
 1022         unsigned int overall_error_count;
 1023 
 1024         unsigned int cnt_msg_on_sb;
 1025 
 1026         /* All stream count of chunks for delivery */
 1027         unsigned int size_on_all_streams;
 1028         unsigned int cnt_on_all_streams;
 1029 
 1030         /* Heart Beat delay in ms */
 1031         uint32_t heart_beat_delay;
 1032 
 1033         /* autoclose */
 1034         unsigned int sctp_autoclose_ticks;
 1035 
 1036         /* how many preopen streams we have */
 1037         unsigned int pre_open_streams;
 1038 
 1039         /* How many streams I support coming into me */
 1040         unsigned int max_inbound_streams;
 1041 
 1042         /* the cookie life I award for any cookie, in seconds */
 1043         unsigned int cookie_life;
 1044         /* time to delay acks for */
 1045         unsigned int delayed_ack;
 1046         unsigned int old_delayed_ack;
 1047         unsigned int sack_freq;
 1048         unsigned int data_pkts_seen;
 1049 
 1050         unsigned int numduptsns;
 1051         int dup_tsns[SCTP_MAX_DUP_TSNS];
 1052         unsigned int initial_init_rto_max;      /* initial RTO for INIT's */
 1053         unsigned int initial_rto;       /* initial send RTO */
 1054         unsigned int minrto;    /* per assoc RTO-MIN */
 1055         unsigned int maxrto;    /* per assoc RTO-MAX */
 1056 
 1057         /* authentication fields */
 1058         sctp_auth_chklist_t *local_auth_chunks;
 1059         sctp_auth_chklist_t *peer_auth_chunks;
 1060         sctp_hmaclist_t *local_hmacs;   /* local HMACs supported */
 1061         sctp_hmaclist_t *peer_hmacs;    /* peer HMACs supported */
 1062         struct sctp_keyhead shared_keys;        /* assoc's shared keys */
 1063         sctp_authinfo_t authinfo;       /* randoms, cached keys */
 1064         /*
 1065          * refcnt to block freeing when a sender or receiver is off coping
 1066          * user data in.
 1067          */
 1068         uint32_t refcnt;
 1069         uint32_t chunks_on_out_queue;   /* total chunks floating around,
 1070                                          * locked by send socket buffer */
 1071         uint32_t peers_adaptation;
 1072         uint16_t peer_hmac_id;  /* peer HMAC id to send */
 1073 
 1074         /*
 1075          * Being that we have no bag to collect stale cookies, and that we
 1076          * really would not want to anyway.. we will count them in this
 1077          * counter. We of course feed them to the pigeons right away (I have
 1078          * always thought of pigeons as flying rats).
 1079          */
 1080         uint16_t stale_cookie_count;
 1081 
 1082         /*
 1083          * For the partial delivery API, if up, invoked this is what last
 1084          * TSN I delivered
 1085          */
 1086         uint16_t str_of_pdapi;
 1087         uint16_t ssn_of_pdapi;
 1088 
 1089         /* counts of actual built streams. Allocation may be more however */
 1090         /* could re-arrange to optimize space here. */
 1091         uint16_t streamincnt;
 1092         uint16_t streamoutcnt;
 1093         uint16_t strm_realoutsize;
 1094         uint16_t strm_pending_add_size;
 1095         /* my maximum number of retrans of INIT and SEND */
 1096         /* copied from SCTP but should be individually setable */
 1097         uint16_t max_init_times;
 1098         uint16_t max_send_times;
 1099 
 1100         uint16_t def_net_failure;
 1101 
 1102         uint16_t def_net_pf_threshold;
 1103 
 1104         /*
 1105          * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
 1106          * awaiting ACK
 1107          */
 1108         uint16_t mapping_array_size;
 1109 
 1110         uint16_t last_strm_seq_delivered;
 1111         uint16_t last_strm_no_delivered;
 1112 
 1113         uint16_t last_revoke_count;
 1114         int16_t num_send_timers_up;
 1115 
 1116         uint16_t stream_locked_on;
 1117         uint16_t ecn_echo_cnt_onq;
 1118 
 1119         uint16_t free_chunk_cnt;
 1120         uint8_t stream_locked;
 1121         uint8_t authenticated;  /* packet authenticated ok */
 1122         /*
 1123          * This flag indicates that a SACK need to be sent. Initially this
 1124          * is 1 to send the first sACK immediately.
 1125          */
 1126         uint8_t send_sack;
 1127 
 1128         /* max burst of new packets into the network */
 1129         uint32_t max_burst;
 1130         /* max burst of fast retransmit packets */
 1131         uint32_t fr_max_burst;
 1132 
 1133         uint8_t sat_network;    /* RTT is in range of sat net or greater */
 1134         uint8_t sat_network_lockout;    /* lockout code */
 1135         uint8_t burst_limit_applied;    /* Burst limit in effect at last send? */
 1136         /* flag goes on when we are doing a partial delivery api */
 1137         uint8_t hb_random_values[4];
 1138         uint8_t fragmented_delivery_inprogress;
 1139         uint8_t fragment_flags;
 1140         uint8_t last_flags_delivered;
 1141         uint8_t hb_ect_randombit;
 1142         uint8_t hb_random_idx;
 1143         uint8_t default_dscp;
 1144         uint8_t asconf_del_pending;     /* asconf delete last addr pending */
 1145 
 1146         /*
 1147          * This value, plus all other ack'd but above cum-ack is added
 1148          * together to cross check against the bit that we have yet to
 1149          * define (probably in the SACK). When the cum-ack is updated, this
 1150          * sum is updated as well.
 1151          */
 1152 
 1153         /* Flag to tell if ECN is allowed */
 1154         uint8_t ecn_allowed;
 1155 
 1156         /* Did the peer make the stream config (add out) request */
 1157         uint8_t peer_req_out;
 1158 
 1159         /* flag to indicate if peer can do asconf */
 1160         uint8_t peer_supports_asconf;
 1161         /* EY - flag to indicate if peer can do nr_sack */
 1162         uint8_t peer_supports_nr_sack;
 1163         /* pr-sctp support flag */
 1164         uint8_t peer_supports_prsctp;
 1165         /* peer authentication support flag */
 1166         uint8_t peer_supports_auth;
 1167         /* stream resets are supported by the peer */
 1168         uint8_t peer_supports_strreset;
 1169         uint8_t local_strreset_support;
 1170 
 1171         uint8_t peer_supports_nat;
 1172         /*
 1173          * packet drop's are supported by the peer, we don't really care
 1174          * about this but we bookkeep it anyway.
 1175          */
 1176         uint8_t peer_supports_pktdrop;
 1177 
 1178         struct sctp_scoping scope;
 1179         /* flags to handle send alternate net tracking */
 1180         uint8_t used_alt_onsack;
 1181         uint8_t used_alt_asconfack;
 1182         uint8_t fast_retran_loss_recovery;
 1183         uint8_t sat_t3_loss_recovery;
 1184         uint8_t dropped_special_cnt;
 1185         uint8_t seen_a_sack_this_pkt;
 1186         uint8_t stream_reset_outstanding;
 1187         uint8_t stream_reset_out_is_outstanding;
 1188         uint8_t delayed_connection;
 1189         uint8_t ifp_had_enobuf;
 1190         uint8_t saw_sack_with_frags;
 1191         uint8_t saw_sack_with_nr_frags;
 1192         uint8_t in_asocid_hash;
 1193         uint8_t assoc_up_sent;
 1194         uint8_t adaptation_needed;
 1195         uint8_t adaptation_sent;
 1196         /* CMT variables */
 1197         uint8_t cmt_dac_pkts_rcvd;
 1198         uint8_t sctp_cmt_on_off;
 1199         uint8_t iam_blocking;
 1200         uint8_t cookie_how[8];
 1201         /* EY 05/05/08 - NR_SACK variable */
 1202         uint8_t sctp_nr_sack_on_off;
 1203         /* JRS 5/21/07 - CMT PF variable */
 1204         uint8_t sctp_cmt_pf;
 1205         uint8_t use_precise_time;
 1206         uint32_t sctp_features;
 1207         uint16_t port;          /* remote UDP encapsulation port */
 1208         /*
 1209          * The mapping array is used to track out of order sequences above
 1210          * last_acked_seq. 0 indicates packet missing 1 indicates packet
 1211          * rec'd. We slide it up every time we raise last_acked_seq and 0
 1212          * trailing locactions out.  If I get a TSN above the array
 1213          * mappingArraySz, I discard the datagram and let retransmit happen.
 1214          */
 1215         uint32_t marked_retrans;
 1216         uint32_t timoinit;
 1217         uint32_t timodata;
 1218         uint32_t timosack;
 1219         uint32_t timoshutdown;
 1220         uint32_t timoheartbeat;
 1221         uint32_t timocookie;
 1222         uint32_t timoshutdownack;
 1223         struct timeval start_time;
 1224         struct timeval discontinuity_time;
 1225 };
 1226 
 1227 #endif

Cache object: f58fdc76ad4495f9d14bff16ea02032e


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.