The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_pcb.h

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    1 /*-
    2  * Copyright (c) 2001-2007, 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("$FreeBSD$");
   35 
   36 #ifndef _NETINET_SCTP_PCB_H_
   37 #define _NETINET_SCTP_PCB_H_
   38 
   39 #include <netinet/sctp_os.h>
   40 #include <netinet/sctp.h>
   41 #include <netinet/sctp_constants.h>
   42 #include <netinet/sctp_sysctl.h>
   43 
   44 LIST_HEAD(sctppcbhead, sctp_inpcb);
   45 LIST_HEAD(sctpasochead, sctp_tcb);
   46 LIST_HEAD(sctpladdr, sctp_laddr);
   47 LIST_HEAD(sctpvtaghead, sctp_tagblock);
   48 LIST_HEAD(sctp_vrflist, sctp_vrf);
   49 LIST_HEAD(sctp_ifnlist, sctp_ifn);
   50 LIST_HEAD(sctp_ifalist, sctp_ifa);
   51 TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
   52 TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
   53 
   54 #include <netinet/sctp_structs.h>
   55 #include <netinet/sctp_auth.h>
   56 
   57 #define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
   58 #define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
   59 
   60 struct sctp_vrf {
   61         LIST_ENTRY(sctp_vrf) next_vrf;
   62         struct sctp_ifalist *vrf_addr_hash;
   63         struct sctp_ifnlist ifnlist;
   64         uint32_t vrf_id;
   65         uint32_t tbl_id_v4;     /* default v4 table id */
   66         uint32_t tbl_id_v6;     /* default v6 table id */
   67         uint32_t total_ifa_count;
   68         u_long vrf_addr_hashmark;
   69         uint32_t refcount;
   70 };
   71 
   72 struct sctp_ifn {
   73         struct sctp_ifalist ifalist;
   74         struct sctp_vrf *vrf;
   75                  LIST_ENTRY(sctp_ifn) next_ifn;
   76                  LIST_ENTRY(sctp_ifn) next_bucket;
   77         void *ifn_p;            /* never access without appropriate lock */
   78         uint32_t ifn_mtu;
   79         uint32_t ifn_type;
   80         uint32_t ifn_index;     /* shorthand way to look at ifn for reference */
   81         uint32_t refcount;      /* number of reference held should be >=
   82                                  * ifa_count */
   83         uint32_t ifa_count;     /* IFA's we hold (in our list - ifalist) */
   84         uint32_t num_v6;        /* number of v6 addresses */
   85         uint32_t num_v4;        /* number of v4 addresses */
   86         uint32_t registered_af; /* registered address family for i/f events */
   87         char ifn_name[SCTP_IFNAMSIZ];
   88 };
   89 
   90 /* SCTP local IFA flags */
   91 #define SCTP_ADDR_VALID         0x00000001      /* its up and active */
   92 #define SCTP_BEING_DELETED      0x00000002      /* being deleted, when
   93                                                  * refcount = 0. Note that it
   94                                                  * is pulled from the ifn list
   95                                                  * and ifa_p is nulled right
   96                                                  * away but it cannot be freed
   97                                                  * until the last *net
   98                                                  * pointing to it is deleted. */
   99 #define SCTP_ADDR_DEFER_USE     0x00000004      /* Hold off using this one */
  100 #define SCTP_ADDR_IFA_UNUSEABLE 0x00000008
  101 
  102 struct sctp_ifa {
  103         LIST_ENTRY(sctp_ifa) next_ifa;
  104         LIST_ENTRY(sctp_ifa) next_bucket;
  105         struct sctp_ifn *ifn_p; /* back pointer to parent ifn */
  106         void *ifa;              /* pointer to ifa, needed for flag update for
  107                                  * that we MUST lock appropriate locks. This
  108                                  * is for V6. */
  109         union sctp_sockstore address;
  110         uint32_t refcount;      /* number of folks refering to this */
  111         uint32_t flags;
  112         uint32_t localifa_flags;
  113         uint32_t vrf_id;        /* vrf_id of this addr (for deleting) */
  114         uint8_t src_is_loop;
  115         uint8_t src_is_priv;
  116         uint8_t src_is_glob;
  117         uint8_t resv;
  118 };
  119 
  120 struct sctp_laddr {
  121         LIST_ENTRY(sctp_laddr) sctp_nxt_addr;   /* next in list */
  122         struct sctp_ifa *ifa;
  123         uint32_t action;        /* Used during asconf and adding if no-zero
  124                                  * src-addr selection will not consider this
  125                                  * address. */
  126         struct timeval start_time;      /* time when this address was created */
  127 };
  128 
  129 struct sctp_block_entry {
  130         int error;
  131 };
  132 
  133 struct sctp_timewait {
  134         uint32_t tv_sec_at_expire;      /* the seconds from boot to expire */
  135         uint32_t v_tag;         /* the vtag that can not be reused */
  136         uint16_t lport;         /* the local port used in vtag */
  137         uint16_t rport;         /* the remote port used in vtag */
  138 };
  139 
  140 struct sctp_tagblock {
  141         LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
  142         struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
  143 };
  144 
  145 
  146 struct sctp_epinfo {
  147 #ifdef INET
  148         struct socket *udp4_tun_socket;
  149 #endif
  150 #ifdef INET6
  151         struct socket *udp6_tun_socket;
  152 #endif
  153         struct sctpasochead *sctp_asochash;
  154         u_long hashasocmark;
  155 
  156         struct sctppcbhead *sctp_ephash;
  157         u_long hashmark;
  158 
  159         /*-
  160          * The TCP model represents a substantial overhead in that we get an
  161          * additional hash table to keep explicit connections in. The
  162          * listening TCP endpoint will exist in the usual ephash above and
  163          * accept only INIT's. It will be incapable of sending off an INIT.
  164          * When a dg arrives we must look in the normal ephash. If we find a
  165          * TCP endpoint that will tell us to go to the specific endpoint
  166          * hash and re-hash to find the right assoc/socket. If we find a UDP
  167          * model socket we then must complete the lookup. If this fails,
  168          * i.e. no association can be found then we must continue to see if
  169          * a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
  170          * acts like a TCP model connected socket).
  171          */
  172         struct sctppcbhead *sctp_tcpephash;
  173         u_long hashtcpmark;
  174         uint32_t hashtblsize;
  175 
  176         struct sctp_vrflist *sctp_vrfhash;
  177         u_long hashvrfmark;
  178 
  179         struct sctp_ifnlist *vrf_ifn_hash;
  180         u_long vrf_ifn_hashmark;
  181 
  182         struct sctppcbhead listhead;
  183         struct sctpladdr addr_wq;
  184 
  185         /* ep zone info */
  186         sctp_zone_t ipi_zone_ep;
  187         sctp_zone_t ipi_zone_asoc;
  188         sctp_zone_t ipi_zone_laddr;
  189         sctp_zone_t ipi_zone_net;
  190         sctp_zone_t ipi_zone_chunk;
  191         sctp_zone_t ipi_zone_readq;
  192         sctp_zone_t ipi_zone_strmoq;
  193         sctp_zone_t ipi_zone_asconf;
  194         sctp_zone_t ipi_zone_asconf_ack;
  195 
  196         struct rwlock ipi_ep_mtx;
  197         struct mtx ipi_iterator_wq_mtx;
  198         struct rwlock ipi_addr_mtx;
  199         struct mtx ipi_pktlog_mtx;
  200         struct mtx wq_addr_mtx;
  201         uint32_t ipi_count_ep;
  202 
  203         /* assoc/tcb zone info */
  204         uint32_t ipi_count_asoc;
  205 
  206         /* local addrlist zone info */
  207         uint32_t ipi_count_laddr;
  208 
  209         /* remote addrlist zone info */
  210         uint32_t ipi_count_raddr;
  211 
  212         /* chunk structure list for output */
  213         uint32_t ipi_count_chunk;
  214 
  215         /* socket queue zone info */
  216         uint32_t ipi_count_readq;
  217 
  218         /* socket queue zone info */
  219         uint32_t ipi_count_strmoq;
  220 
  221         /* Number of vrfs */
  222         uint32_t ipi_count_vrfs;
  223 
  224         /* Number of ifns */
  225         uint32_t ipi_count_ifns;
  226 
  227         /* Number of ifas */
  228         uint32_t ipi_count_ifas;
  229 
  230         /* system wide number of free chunks hanging around */
  231         uint32_t ipi_free_chunks;
  232         uint32_t ipi_free_strmoq;
  233 
  234         struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
  235 
  236         /* address work queue handling */
  237         struct sctp_timer addr_wq_timer;
  238 
  239 };
  240 
  241 
  242 struct sctp_base_info {
  243         /*
  244          * All static structures that anchor the system must be here.
  245          */
  246         struct sctp_epinfo sctppcbinfo;
  247 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
  248         struct sctpstat *sctpstat;
  249 #else
  250         struct sctpstat sctpstat;
  251 #endif
  252         struct sctp_sysctl sctpsysctl;
  253         uint8_t first_time;
  254         char sctp_pcb_initialized;
  255 #if defined(SCTP_PACKET_LOGGING)
  256         int packet_log_writers;
  257         int packet_log_end;
  258         uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
  259 #endif
  260 };
  261 
  262 /*-
  263  * Here we have all the relevant information for each SCTP entity created. We
  264  * will need to modify this as approprate. We also need to figure out how to
  265  * access /dev/random.
  266  */
  267 struct sctp_pcb {
  268         unsigned int time_of_secret_change;     /* number of seconds from
  269                                                  * timeval.tv_sec */
  270         uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
  271         unsigned int size_of_a_cookie;
  272 
  273         unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
  274         unsigned int sctp_minrto;
  275         unsigned int sctp_maxrto;
  276         unsigned int initial_rto;
  277         int initial_init_rto_max;
  278 
  279         unsigned int sctp_sack_freq;
  280         uint32_t sctp_sws_sender;
  281         uint32_t sctp_sws_receiver;
  282 
  283         uint32_t sctp_default_cc_module;
  284         uint32_t sctp_default_ss_module;
  285         /* authentication related fields */
  286         struct sctp_keyhead shared_keys;
  287         sctp_auth_chklist_t *local_auth_chunks;
  288         sctp_hmaclist_t *local_hmacs;
  289         uint16_t default_keyid;
  290 
  291         /* various thresholds */
  292         /* Max times I will init at a guy */
  293         uint16_t max_init_times;
  294 
  295         /* Max times I will send before we consider someone dead */
  296         uint16_t max_send_times;
  297 
  298         uint16_t def_net_failure;
  299 
  300         uint16_t def_net_pf_threshold;
  301 
  302         /* number of streams to pre-open on a association */
  303         uint16_t pre_open_stream_count;
  304         uint16_t max_open_streams_intome;
  305 
  306         /* random number generator */
  307         uint32_t random_counter;
  308         uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
  309         uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
  310 
  311         /*
  312          * This timer is kept running per endpoint.  When it fires it will
  313          * change the secret key.  The default is once a hour
  314          */
  315         struct sctp_timer signature_change;
  316 
  317         /* Zero copy full buffer timer */
  318         struct sctp_timer zero_copy_timer;
  319         /* Zero copy app to transport (sendq) read repulse timer */
  320         struct sctp_timer zero_copy_sendq_timer;
  321         uint32_t def_cookie_life;
  322         /* defaults to 0 */
  323         int auto_close_time;
  324         uint32_t initial_sequence_debug;
  325         uint32_t adaptation_layer_indicator;
  326         uint8_t adaptation_layer_indicator_provided;
  327         uint32_t store_at;
  328         uint32_t max_burst;
  329         uint32_t fr_max_burst;
  330 #ifdef INET6
  331         uint32_t default_flowlabel;
  332 #endif
  333         uint8_t default_dscp;
  334         char current_secret_number;
  335         char last_secret_number;
  336         uint16_t port;          /* remote UDP encapsulation port */
  337 };
  338 
  339 #ifndef SCTP_ALIGNMENT
  340 #define SCTP_ALIGNMENT 32
  341 #endif
  342 
  343 #ifndef SCTP_ALIGNM1
  344 #define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
  345 #endif
  346 
  347 #define sctp_lport ip_inp.inp.inp_lport
  348 
  349 struct sctp_pcbtsn_rlog {
  350         uint32_t vtag;
  351         uint16_t strm;
  352         uint16_t seq;
  353         uint16_t sz;
  354         uint16_t flgs;
  355 };
  356 
  357 #define SCTP_READ_LOG_SIZE 135  /* we choose the number to make a pcb a page */
  358 
  359 
  360 struct sctp_inpcb {
  361         /*-
  362          * put an inpcb in front of it all, kind of a waste but we need to
  363          * for compatability with all the other stuff.
  364          */
  365         union {
  366                 struct inpcb inp;
  367                 char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
  368                         ~SCTP_ALIGNM1];
  369         }     ip_inp;
  370 
  371 
  372         /* Socket buffer lock protects read_queue and of course sb_cc */
  373         struct sctp_readhead read_queue;
  374 
  375                       LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
  376         /* hash of all endpoints for model */
  377                       LIST_ENTRY(sctp_inpcb) sctp_hash;
  378         /* count of local addresses bound, 0 if bound all */
  379         int laddr_count;
  380 
  381         /* list of addrs in use by the EP, NULL if bound-all */
  382         struct sctpladdr sctp_addr_list;
  383         /*
  384          * used for source address selection rotation when we are subset
  385          * bound
  386          */
  387         struct sctp_laddr *next_addr_touse;
  388 
  389         /* back pointer to our socket */
  390         struct socket *sctp_socket;
  391         uint64_t sctp_features; /* Feature flags */
  392         uint32_t sctp_flags;    /* INP state flag set */
  393         uint32_t sctp_mobility_features;        /* Mobility  Feature flags */
  394         struct sctp_pcb sctp_ep;/* SCTP ep data */
  395         /* head of the hash of all associations */
  396         struct sctpasochead *sctp_tcbhash;
  397         u_long sctp_hashmark;
  398         /* head of the list of all associations */
  399         struct sctpasochead sctp_asoc_list;
  400 #ifdef SCTP_TRACK_FREED_ASOCS
  401         struct sctpasochead sctp_asoc_free_list;
  402 #endif
  403         struct sctp_iterator *inp_starting_point_for_iterator;
  404         uint32_t sctp_frag_point;
  405         uint32_t partial_delivery_point;
  406         uint32_t sctp_context;
  407         uint8_t local_strreset_support;
  408         uint32_t sctp_cmt_on_off;
  409         uint32_t sctp_ecn_enable;
  410         struct sctp_nonpad_sndrcvinfo def_send;
  411         /*-
  412          * These three are here for the sosend_dgram
  413          * (pkt, pkt_last and control).
  414          * routine. However, I don't think anyone in
  415          * the current FreeBSD kernel calls this. So
  416          * they are candidates with sctp_sendm for
  417          * de-supporting.
  418          */
  419         struct mbuf *pkt, *pkt_last;
  420         struct mbuf *control;
  421         struct mtx inp_mtx;
  422         struct mtx inp_create_mtx;
  423         struct mtx inp_rdata_mtx;
  424         int32_t refcount;
  425         uint32_t def_vrf_id;
  426         uint32_t total_sends;
  427         uint32_t total_recvs;
  428         uint32_t last_abort_code;
  429         uint32_t total_nospaces;
  430         struct sctpasochead *sctp_asocidhash;
  431         u_long hashasocidmark;
  432         uint32_t sctp_associd_counter;
  433 
  434 #ifdef SCTP_ASOCLOG_OF_TSNS
  435         struct sctp_pcbtsn_rlog readlog[SCTP_READ_LOG_SIZE];
  436         uint32_t readlog_index;
  437 #endif
  438 };
  439 
  440 struct sctp_tcb {
  441         struct socket *sctp_socket;     /* back pointer to socket */
  442         struct sctp_inpcb *sctp_ep;     /* back pointer to ep */
  443                    LIST_ENTRY(sctp_tcb) sctp_tcbhash;   /* next link in hash
  444                                                          * table */
  445                    LIST_ENTRY(sctp_tcb) sctp_tcblist;   /* list of all of the
  446                                                          * TCB's */
  447                    LIST_ENTRY(sctp_tcb) sctp_tcbasocidhash;     /* next link in asocid
  448                                                                  * hash table */
  449                    LIST_ENTRY(sctp_tcb) sctp_asocs;     /* vtag hash list */
  450         struct sctp_block_entry *block_entry;   /* pointer locked by  socket
  451                                                  * send buffer */
  452         struct sctp_association asoc;
  453         /*-
  454          * freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
  455          * tcb_lock. Its special in this way to help avoid extra mutex calls
  456          * in the reading of data.
  457          */
  458         uint32_t freed_by_sorcv_sincelast;
  459         uint32_t total_sends;
  460         uint32_t total_recvs;
  461         int freed_from_where;
  462         uint16_t rport;         /* remote port in network format */
  463         uint16_t resv;
  464         struct mtx tcb_mtx;
  465         struct mtx tcb_send_mtx;
  466 };
  467 
  468 
  469 
  470 #include <netinet/sctp_lock_bsd.h>
  471 
  472 
  473 /* TODO where to put non-_KERNEL things for __Userspace__? */
  474 #if defined(_KERNEL) || defined(__Userspace__)
  475 
  476 /* Attention Julian, this is the extern that
  477  * goes with the base info. sctp_pcb.c has
  478  * the real definition.
  479  */
  480 VNET_DECLARE(struct sctp_base_info, system_base_info);
  481 
  482 #ifdef INET6
  483 int SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b);
  484 
  485 #endif
  486 
  487 void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
  488 
  489 struct sctp_ifn *
  490          sctp_find_ifn(void *ifn, uint32_t ifn_index);
  491 
  492 struct sctp_vrf *sctp_allocate_vrf(int vrfid);
  493 struct sctp_vrf *sctp_find_vrf(uint32_t vrfid);
  494 void sctp_free_vrf(struct sctp_vrf *vrf);
  495 
  496 /*-
  497  * Change address state, can be used if
  498  * O/S supports telling transports about
  499  * changes to IFA/IFN's (link layer triggers).
  500  * If a ifn goes down, we will do src-addr-selection
  501  * and NOT use that, as a source address. This does
  502  * not stop the routing system from routing out
  503  * that interface, but we won't put it as a source.
  504  */
  505 void sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
  506 void sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
  507 
  508 struct sctp_ifa *
  509 sctp_add_addr_to_vrf(uint32_t vrfid,
  510     void *ifn, uint32_t ifn_index, uint32_t ifn_type,
  511     const char *if_name,
  512     void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
  513     int dynamic_add);
  514 
  515 void sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu);
  516 
  517 void sctp_free_ifn(struct sctp_ifn *sctp_ifnp);
  518 void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
  519 
  520 
  521 void 
  522 sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
  523     uint32_t ifn_index, const char *if_name);
  524 
  525 
  526 
  527 struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
  528 
  529 struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t);
  530 
  531 int 
  532 sctp_inpcb_bind(struct socket *, struct sockaddr *,
  533     struct sctp_ifa *, struct thread *);
  534 
  535 struct sctp_tcb *
  536 sctp_findassociation_addr(struct mbuf *, int,
  537     struct sockaddr *, struct sockaddr *,
  538     struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
  539     struct sctp_nets **, uint32_t vrf_id);
  540 
  541 struct sctp_tcb *
  542 sctp_findassociation_addr_sa(struct sockaddr *,
  543     struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t);
  544 
  545 void
  546 sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
  547     struct sctp_tcb *);
  548 
  549 /*-
  550  * For this call ep_addr, the to is the destination endpoint address of the
  551  * peer (relative to outbound). The from field is only used if the TCP model
  552  * is enabled and helps distingush amongst the subset bound (non-boundall).
  553  * The TCP model MAY change the actual ep field, this is why it is passed.
  554  */
  555 struct sctp_tcb *
  556 sctp_findassociation_ep_addr(struct sctp_inpcb **,
  557     struct sockaddr *, struct sctp_nets **, struct sockaddr *,
  558     struct sctp_tcb *);
  559 
  560 struct sctp_tcb *
  561          sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock);
  562 
  563 struct sctp_tcb *
  564 sctp_findassociation_ep_asocid(struct sctp_inpcb *,
  565     sctp_assoc_t, int);
  566 
  567 struct sctp_tcb *
  568 sctp_findassociation_ep_asconf(struct mbuf *, int, struct sockaddr *,
  569     struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **, uint32_t vrf_id);
  570 
  571 int sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id);
  572 
  573 int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id);
  574 
  575 void sctp_inpcb_free(struct sctp_inpcb *, int, int);
  576 
  577 struct sctp_tcb *
  578 sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
  579     int *, uint32_t, uint32_t, struct thread *);
  580 
  581 int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
  582 
  583 
  584 void sctp_delete_from_timewait(uint32_t, uint16_t, uint16_t);
  585 
  586 int sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport);
  587 
  588 void
  589      sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport);
  590 
  591 void sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t);
  592 
  593 int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t);
  594 
  595 void sctp_remove_laddr(struct sctp_laddr *);
  596 
  597 void sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *);
  598 
  599 int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, struct sctp_nets **, int, int);
  600 
  601 void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
  602 
  603 int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
  604 
  605 void sctp_pcb_init(void);
  606 
  607 void sctp_pcb_finish(void);
  608 
  609 void sctp_add_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
  610 void sctp_del_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
  611 
  612 int
  613 sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
  614     struct sockaddr *, struct sockaddr *, struct sockaddr *);
  615 
  616 int
  617 sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
  618     struct sctp_nets *);
  619 
  620 int sctp_is_vtag_good(uint32_t, uint16_t lport, uint16_t rport, struct timeval *);
  621 
  622 /* void sctp_drain(void); */
  623 
  624 int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
  625 
  626 int sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp);
  627 
  628 /*-
  629  * Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
  630  * indicates run on ONLY assoc's of the specified endpoint.
  631  */
  632 int
  633 sctp_initiate_iterator(inp_func inpf,
  634     asoc_func af,
  635     inp_func inpe,
  636     uint32_t, uint32_t,
  637     uint32_t, void *,
  638     uint32_t,
  639     end_func ef,
  640     struct sctp_inpcb *,
  641     uint8_t co_off);
  642 
  643 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
  644 void
  645      sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use);
  646 
  647 #endif
  648 
  649 #ifdef INVARIANTS
  650 void
  651      sctp_validate_no_locks(struct sctp_inpcb *inp);
  652 
  653 #endif
  654 
  655 #endif                          /* _KERNEL */
  656 #endif                          /* !__sctp_pcb_h__ */

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