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) 2008-2011, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions are met:
    7  *
    8  * a) Redistributions of source code must retain the above copyright notice,
    9  *    this list of conditions and the following disclaimer.
   10  *
   11  * b) Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in
   13  *    the documentation and/or other materials provided with the distribution.
   14  *
   15  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   16  *    contributors may be used to endorse or promote products derived
   17  *    from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   29  * THE POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 /* $KAME: sctp_pcb.h,v 1.21 2005/07/16 01:18:47 suz Exp $        */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/8.3/sys/netinet/sctp_pcb.h 231490 2012-02-11 00:54:24Z tuexen $");
   36 
   37 #ifndef __sctp_pcb_h__
   38 #define __sctp_pcb_h__
   39 
   40 #include <netinet/sctp_os.h>
   41 #include <netinet/sctp.h>
   42 #include <netinet/sctp_constants.h>
   43 #include <netinet/sctp_sysctl.h>
   44 
   45 LIST_HEAD(sctppcbhead, sctp_inpcb);
   46 LIST_HEAD(sctpasochead, sctp_tcb);
   47 LIST_HEAD(sctpladdr, sctp_laddr);
   48 LIST_HEAD(sctpvtaghead, sctp_tagblock);
   49 LIST_HEAD(sctp_vrflist, sctp_vrf);
   50 LIST_HEAD(sctp_ifnlist, sctp_ifn);
   51 LIST_HEAD(sctp_ifalist, sctp_ifa);
   52 TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
   53 TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
   54 
   55 #include <netinet/sctp_structs.h>
   56 #include <netinet/sctp_auth.h>
   57 
   58 #define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
   59 #define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
   60 
   61 struct sctp_vrf {
   62         LIST_ENTRY(sctp_vrf) next_vrf;
   63         struct sctp_ifalist *vrf_addr_hash;
   64         struct sctp_ifnlist ifnlist;
   65         uint32_t vrf_id;
   66         uint32_t tbl_id_v4;     /* default v4 table id */
   67         uint32_t tbl_id_v6;     /* default v6 table id */
   68         uint32_t total_ifa_count;
   69         u_long vrf_addr_hashmark;
   70         uint32_t refcount;
   71 };
   72 
   73 struct sctp_ifn {
   74         struct sctp_ifalist ifalist;
   75         struct sctp_vrf *vrf;
   76                  LIST_ENTRY(sctp_ifn) next_ifn;
   77                  LIST_ENTRY(sctp_ifn) next_bucket;
   78         void *ifn_p;            /* never access without appropriate lock */
   79         uint32_t ifn_mtu;
   80         uint32_t ifn_type;
   81         uint32_t ifn_index;     /* shorthand way to look at ifn for reference */
   82         uint32_t refcount;      /* number of reference held should be >=
   83                                  * ifa_count */
   84         uint32_t ifa_count;     /* IFA's we hold (in our list - ifalist) */
   85         uint32_t num_v6;        /* number of v6 addresses */
   86         uint32_t num_v4;        /* number of v4 addresses */
   87         uint32_t registered_af; /* registered address family for i/f events */
   88         char ifn_name[SCTP_IFNAMSIZ];
   89 };
   90 
   91 /* SCTP local IFA flags */
   92 #define SCTP_ADDR_VALID         0x00000001      /* its up and active */
   93 #define SCTP_BEING_DELETED      0x00000002      /* being deleted, when
   94                                                  * refcount = 0. Note that it
   95                                                  * is pulled from the ifn list
   96                                                  * and ifa_p is nulled right
   97                                                  * away but it cannot be freed
   98                                                  * until the last *net
   99                                                  * pointing to it is deleted. */
  100 #define SCTP_ADDR_DEFER_USE     0x00000004      /* Hold off using this one */
  101 #define SCTP_ADDR_IFA_UNUSEABLE 0x00000008
  102 
  103 struct sctp_ifa {
  104         LIST_ENTRY(sctp_ifa) next_ifa;
  105         LIST_ENTRY(sctp_ifa) next_bucket;
  106         struct sctp_ifn *ifn_p; /* back pointer to parent ifn */
  107         void *ifa;              /* pointer to ifa, needed for flag update for
  108                                  * that we MUST lock appropriate locks. This
  109                                  * is for V6. */
  110         union sctp_sockstore address;
  111         uint32_t refcount;      /* number of folks refering to this */
  112         uint32_t flags;
  113         uint32_t localifa_flags;
  114         uint32_t vrf_id;        /* vrf_id of this addr (for deleting) */
  115         uint8_t src_is_loop;
  116         uint8_t src_is_priv;
  117         uint8_t src_is_glob;
  118         uint8_t resv;
  119 };
  120 
  121 struct sctp_laddr {
  122         LIST_ENTRY(sctp_laddr) sctp_nxt_addr;   /* next in list */
  123         struct sctp_ifa *ifa;
  124         uint32_t action;        /* Used during asconf and adding if no-zero
  125                                  * src-addr selection will not consider this
  126                                  * address. */
  127         struct timeval start_time;      /* time when this address was created */
  128 };
  129 
  130 struct sctp_block_entry {
  131         int error;
  132 };
  133 
  134 struct sctp_timewait {
  135         uint32_t tv_sec_at_expire;      /* the seconds from boot to expire */
  136         uint32_t v_tag;         /* the vtag that can not be reused */
  137         uint16_t lport;         /* the local port used in vtag */
  138         uint16_t rport;         /* the remote port used in vtag */
  139 };
  140 
  141 struct sctp_tagblock {
  142         LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
  143         struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
  144 };
  145 
  146 
  147 struct sctp_epinfo {
  148         struct socket *udp_tun_socket;
  149         struct sctpasochead *sctp_asochash;
  150         u_long hashasocmark;
  151 
  152         struct sctppcbhead *sctp_ephash;
  153         u_long hashmark;
  154 
  155         /*-
  156          * The TCP model represents a substantial overhead in that we get an
  157          * additional hash table to keep explicit connections in. The
  158          * listening TCP endpoint will exist in the usual ephash above and
  159          * accept only INIT's. It will be incapable of sending off an INIT.
  160          * When a dg arrives we must look in the normal ephash. If we find a
  161          * TCP endpoint that will tell us to go to the specific endpoint
  162          * hash and re-hash to find the right assoc/socket. If we find a UDP
  163          * model socket we then must complete the lookup. If this fails,
  164          * i.e. no association can be found then we must continue to see if
  165          * a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
  166          * acts like a TCP model connected socket).
  167          */
  168         struct sctppcbhead *sctp_tcpephash;
  169         u_long hashtcpmark;
  170         uint32_t hashtblsize;
  171 
  172         struct sctp_vrflist *sctp_vrfhash;
  173         u_long hashvrfmark;
  174 
  175         struct sctp_ifnlist *vrf_ifn_hash;
  176         u_long vrf_ifn_hashmark;
  177 
  178         struct sctppcbhead listhead;
  179         struct sctpladdr addr_wq;
  180 
  181         /* ep zone info */
  182         sctp_zone_t ipi_zone_ep;
  183         sctp_zone_t ipi_zone_asoc;
  184         sctp_zone_t ipi_zone_laddr;
  185         sctp_zone_t ipi_zone_net;
  186         sctp_zone_t ipi_zone_chunk;
  187         sctp_zone_t ipi_zone_readq;
  188         sctp_zone_t ipi_zone_strmoq;
  189         sctp_zone_t ipi_zone_asconf;
  190         sctp_zone_t ipi_zone_asconf_ack;
  191 
  192         struct rwlock ipi_ep_mtx;
  193         struct mtx ipi_iterator_wq_mtx;
  194         struct rwlock ipi_addr_mtx;
  195         struct mtx ipi_pktlog_mtx;
  196         struct mtx wq_addr_mtx;
  197         uint32_t ipi_count_ep;
  198 
  199         /* assoc/tcb zone info */
  200         uint32_t ipi_count_asoc;
  201 
  202         /* local addrlist zone info */
  203         uint32_t ipi_count_laddr;
  204 
  205         /* remote addrlist zone info */
  206         uint32_t ipi_count_raddr;
  207 
  208         /* chunk structure list for output */
  209         uint32_t ipi_count_chunk;
  210 
  211         /* socket queue zone info */
  212         uint32_t ipi_count_readq;
  213 
  214         /* socket queue zone info */
  215         uint32_t ipi_count_strmoq;
  216 
  217         /* Number of vrfs */
  218         uint32_t ipi_count_vrfs;
  219 
  220         /* Number of ifns */
  221         uint32_t ipi_count_ifns;
  222 
  223         /* Number of ifas */
  224         uint32_t ipi_count_ifas;
  225 
  226         /* system wide number of free chunks hanging around */
  227         uint32_t ipi_free_chunks;
  228         uint32_t ipi_free_strmoq;
  229 
  230         struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
  231 
  232         /* address work queue handling */
  233         struct sctp_timer addr_wq_timer;
  234 
  235 };
  236 
  237 
  238 struct sctp_base_info {
  239         /*
  240          * All static structures that anchor the system must be here.
  241          */
  242         struct sctp_epinfo sctppcbinfo;
  243 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
  244         struct sctpstat *sctpstat;
  245 #else
  246         struct sctpstat sctpstat;
  247 #endif
  248         struct sctp_sysctl sctpsysctl;
  249         uint8_t first_time;
  250         char sctp_pcb_initialized;
  251 #if defined(SCTP_PACKET_LOGGING)
  252         int packet_log_writers;
  253         int packet_log_end;
  254         uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
  255 #endif
  256 };
  257 
  258 /*-
  259  * Here we have all the relevant information for each SCTP entity created. We
  260  * will need to modify this as approprate. We also need to figure out how to
  261  * access /dev/random.
  262  */
  263 struct sctp_pcb {
  264         unsigned int time_of_secret_change;     /* number of seconds from
  265                                                  * timeval.tv_sec */
  266         uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
  267         unsigned int size_of_a_cookie;
  268 
  269         unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
  270         unsigned int sctp_minrto;
  271         unsigned int sctp_maxrto;
  272         unsigned int initial_rto;
  273         int initial_init_rto_max;
  274 
  275         unsigned int sctp_sack_freq;
  276         uint32_t sctp_sws_sender;
  277         uint32_t sctp_sws_receiver;
  278 
  279         uint32_t sctp_default_cc_module;
  280         uint32_t sctp_default_ss_module;
  281         /* authentication related fields */
  282         struct sctp_keyhead shared_keys;
  283         sctp_auth_chklist_t *local_auth_chunks;
  284         sctp_hmaclist_t *local_hmacs;
  285         uint16_t default_keyid;
  286 
  287         /* various thresholds */
  288         /* Max times I will init at a guy */
  289         uint16_t max_init_times;
  290 
  291         /* Max times I will send before we consider someone dead */
  292         uint16_t max_send_times;
  293 
  294         uint16_t def_net_failure;
  295 
  296         uint16_t def_net_pf_threshold;
  297 
  298         /* number of streams to pre-open on a association */
  299         uint16_t pre_open_stream_count;
  300         uint16_t max_open_streams_intome;
  301 
  302         /* random number generator */
  303         uint32_t random_counter;
  304         uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
  305         uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
  306 
  307         /*
  308          * This timer is kept running per endpoint.  When it fires it will
  309          * change the secret key.  The default is once a hour
  310          */
  311         struct sctp_timer signature_change;
  312 
  313         /* Zero copy full buffer timer */
  314         struct sctp_timer zero_copy_timer;
  315         /* Zero copy app to transport (sendq) read repulse timer */
  316         struct sctp_timer zero_copy_sendq_timer;
  317         uint32_t def_cookie_life;
  318         /* defaults to 0 */
  319         int auto_close_time;
  320         uint32_t initial_sequence_debug;
  321         uint32_t adaptation_layer_indicator;
  322         uint32_t store_at;
  323         uint32_t max_burst;
  324         uint32_t fr_max_burst;
  325 #ifdef INET6
  326         uint32_t default_flowlabel;
  327 #endif
  328         uint8_t default_dscp;
  329         char current_secret_number;
  330         char last_secret_number;
  331         uint16_t port;          /* remote UDP encapsulation port */
  332 };
  333 
  334 #ifndef SCTP_ALIGNMENT
  335 #define SCTP_ALIGNMENT 32
  336 #endif
  337 
  338 #ifndef SCTP_ALIGNM1
  339 #define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
  340 #endif
  341 
  342 #define sctp_lport ip_inp.inp.inp_lport
  343 
  344 struct sctp_pcbtsn_rlog {
  345         uint32_t vtag;
  346         uint16_t strm;
  347         uint16_t seq;
  348         uint16_t sz;
  349         uint16_t flgs;
  350 };
  351 
  352 #define SCTP_READ_LOG_SIZE 135  /* we choose the number to make a pcb a page */
  353 
  354 
  355 struct sctp_inpcb {
  356         /*-
  357          * put an inpcb in front of it all, kind of a waste but we need to
  358          * for compatability with all the other stuff.
  359          */
  360         union {
  361                 struct inpcb inp;
  362                 char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
  363                         ~SCTP_ALIGNM1];
  364         }     ip_inp;
  365 
  366 
  367         /* Socket buffer lock protects read_queue and of course sb_cc */
  368         struct sctp_readhead read_queue;
  369 
  370                       LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
  371         /* hash of all endpoints for model */
  372                       LIST_ENTRY(sctp_inpcb) sctp_hash;
  373         /* count of local addresses bound, 0 if bound all */
  374         int laddr_count;
  375 
  376         /* list of addrs in use by the EP, NULL if bound-all */
  377         struct sctpladdr sctp_addr_list;
  378         /*
  379          * used for source address selection rotation when we are subset
  380          * bound
  381          */
  382         struct sctp_laddr *next_addr_touse;
  383 
  384         /* back pointer to our socket */
  385         struct socket *sctp_socket;
  386         uint32_t sctp_flags;    /* INP state flag set */
  387         uint32_t sctp_features; /* Feature flags */
  388         uint32_t sctp_mobility_features;        /* Mobility  Feature flags */
  389         struct sctp_pcb sctp_ep;/* SCTP ep data */
  390         /* head of the hash of all associations */
  391         struct sctpasochead *sctp_tcbhash;
  392         u_long sctp_hashmark;
  393         /* head of the list of all associations */
  394         struct sctpasochead sctp_asoc_list;
  395 #ifdef SCTP_TRACK_FREED_ASOCS
  396         struct sctpasochead sctp_asoc_free_list;
  397 #endif
  398         struct sctp_iterator *inp_starting_point_for_iterator;
  399         uint32_t sctp_frag_point;
  400         uint32_t partial_delivery_point;
  401         uint32_t sctp_context;
  402         uint32_t sctp_cmt_on_off;
  403         uint32_t sctp_ecn_enable;
  404         struct sctp_nonpad_sndrcvinfo def_send;
  405         /*-
  406          * These three are here for the sosend_dgram
  407          * (pkt, pkt_last and control).
  408          * routine. However, I don't think anyone in
  409          * the current FreeBSD kernel calls this. So
  410          * they are candidates with sctp_sendm for
  411          * de-supporting.
  412          */
  413         struct mbuf *pkt, *pkt_last;
  414         struct mbuf *control;
  415         struct mtx inp_mtx;
  416         struct mtx inp_create_mtx;
  417         struct mtx inp_rdata_mtx;
  418         int32_t refcount;
  419         uint32_t def_vrf_id;
  420         uint32_t total_sends;
  421         uint32_t total_recvs;
  422         uint32_t last_abort_code;
  423         uint32_t total_nospaces;
  424         struct sctpasochead *sctp_asocidhash;
  425         u_long hashasocidmark;
  426         uint32_t sctp_associd_counter;
  427 
  428 #ifdef SCTP_ASOCLOG_OF_TSNS
  429         struct sctp_pcbtsn_rlog readlog[SCTP_READ_LOG_SIZE];
  430         uint32_t readlog_index;
  431 #endif
  432 };
  433 
  434 struct sctp_tcb {
  435         struct socket *sctp_socket;     /* back pointer to socket */
  436         struct sctp_inpcb *sctp_ep;     /* back pointer to ep */
  437                    LIST_ENTRY(sctp_tcb) sctp_tcbhash;   /* next link in hash
  438                                                          * table */
  439                    LIST_ENTRY(sctp_tcb) sctp_tcblist;   /* list of all of the
  440                                                          * TCB's */
  441                    LIST_ENTRY(sctp_tcb) sctp_tcbasocidhash;     /* next link in asocid
  442                                                                  * hash table */
  443                    LIST_ENTRY(sctp_tcb) sctp_asocs;     /* vtag hash list */
  444         struct sctp_block_entry *block_entry;   /* pointer locked by  socket
  445                                                  * send buffer */
  446         struct sctp_association asoc;
  447         /*-
  448          * freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
  449          * tcb_lock. Its special in this way to help avoid extra mutex calls
  450          * in the reading of data.
  451          */
  452         uint32_t freed_by_sorcv_sincelast;
  453         uint32_t total_sends;
  454         uint32_t total_recvs;
  455         int freed_from_where;
  456         uint16_t rport;         /* remote port in network format */
  457         uint16_t resv;
  458         struct mtx tcb_mtx;
  459         struct mtx tcb_send_mtx;
  460 };
  461 
  462 
  463 
  464 #include <netinet/sctp_lock_bsd.h>
  465 
  466 
  467 /* TODO where to put non-_KERNEL things for __Userspace__? */
  468 #if defined(_KERNEL) || defined(__Userspace__)
  469 
  470 /* Attention Julian, this is the extern that
  471  * goes with the base info. sctp_pcb.c has
  472  * the real definition.
  473  */
  474 VNET_DECLARE(struct sctp_base_info, system_base_info);
  475 
  476 #ifdef INET6
  477 int SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b);
  478 
  479 #endif
  480 
  481 void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
  482 
  483 struct sctp_ifn *
  484          sctp_find_ifn(void *ifn, uint32_t ifn_index);
  485 
  486 struct sctp_vrf *sctp_allocate_vrf(int vrfid);
  487 struct sctp_vrf *sctp_find_vrf(uint32_t vrfid);
  488 void sctp_free_vrf(struct sctp_vrf *vrf);
  489 
  490 /*-
  491  * Change address state, can be used if
  492  * O/S supports telling transports about
  493  * changes to IFA/IFN's (link layer triggers).
  494  * If a ifn goes down, we will do src-addr-selection
  495  * and NOT use that, as a source address. This does
  496  * not stop the routing system from routing out
  497  * that interface, but we won't put it as a source.
  498  */
  499 void sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
  500 void sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
  501 
  502 struct sctp_ifa *
  503 sctp_add_addr_to_vrf(uint32_t vrfid,
  504     void *ifn, uint32_t ifn_index, uint32_t ifn_type,
  505     const char *if_name,
  506     void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
  507     int dynamic_add);
  508 
  509 void sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu);
  510 
  511 void sctp_free_ifn(struct sctp_ifn *sctp_ifnp);
  512 void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
  513 
  514 
  515 void 
  516 sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
  517     uint32_t ifn_index, const char *if_name);
  518 
  519 
  520 
  521 struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
  522 
  523 struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t);
  524 
  525 int 
  526 sctp_inpcb_bind(struct socket *, struct sockaddr *,
  527     struct sctp_ifa *, struct thread *);
  528 
  529 struct sctp_tcb *
  530 sctp_findassociation_addr(struct mbuf *, int,
  531     struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
  532     struct sctp_nets **, uint32_t vrf_id);
  533 
  534 struct sctp_tcb *
  535 sctp_findassociation_addr_sa(struct sockaddr *,
  536     struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t);
  537 
  538 void
  539 sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
  540     struct sctp_tcb *);
  541 
  542 /*-
  543  * For this call ep_addr, the to is the destination endpoint address of the
  544  * peer (relative to outbound). The from field is only used if the TCP model
  545  * is enabled and helps distingush amongst the subset bound (non-boundall).
  546  * The TCP model MAY change the actual ep field, this is why it is passed.
  547  */
  548 struct sctp_tcb *
  549 sctp_findassociation_ep_addr(struct sctp_inpcb **,
  550     struct sockaddr *, struct sctp_nets **, struct sockaddr *,
  551     struct sctp_tcb *);
  552 
  553 struct sctp_tcb *
  554          sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock);
  555 
  556 struct sctp_tcb *
  557 sctp_findassociation_ep_asocid(struct sctp_inpcb *,
  558     sctp_assoc_t, int);
  559 
  560 struct sctp_tcb *
  561 sctp_findassociation_ep_asconf(struct mbuf *, int,
  562     struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **, uint32_t vrf_id);
  563 
  564 int sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id);
  565 
  566 int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id);
  567 
  568 void sctp_inpcb_free(struct sctp_inpcb *, int, int);
  569 
  570 struct sctp_tcb *
  571 sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
  572     int *, uint32_t, uint32_t, struct thread *);
  573 
  574 int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
  575 
  576 
  577 void sctp_delete_from_timewait(uint32_t, uint16_t, uint16_t);
  578 
  579 int sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport);
  580 
  581 void
  582      sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport);
  583 
  584 void sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t);
  585 
  586 int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t);
  587 
  588 void sctp_remove_laddr(struct sctp_laddr *);
  589 
  590 void sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *);
  591 
  592 int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, struct sctp_nets **, int, int);
  593 
  594 void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
  595 
  596 int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
  597 
  598 void sctp_pcb_init(void);
  599 
  600 void sctp_pcb_finish(void);
  601 
  602 void sctp_add_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
  603 void sctp_del_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
  604 
  605 int
  606 sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int,
  607     int, struct sctphdr *, struct sockaddr *);
  608 
  609 int
  610 sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
  611     struct sctp_nets *);
  612 
  613 int sctp_is_vtag_good(uint32_t, uint16_t lport, uint16_t rport, struct timeval *);
  614 
  615 /* void sctp_drain(void); */
  616 
  617 int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
  618 
  619 int sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp);
  620 
  621 /*-
  622  * Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
  623  * indicates run on ONLY assoc's of the specified endpoint.
  624  */
  625 int
  626 sctp_initiate_iterator(inp_func inpf,
  627     asoc_func af,
  628     inp_func inpe,
  629     uint32_t, uint32_t,
  630     uint32_t, void *,
  631     uint32_t,
  632     end_func ef,
  633     struct sctp_inpcb *,
  634     uint8_t co_off);
  635 
  636 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
  637 void
  638      sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use);
  639 
  640 #endif
  641 
  642 #ifdef INVARIANTS
  643 void
  644      sctp_validate_no_locks(struct sctp_inpcb *inp);
  645 
  646 #endif
  647 
  648 #endif                          /* _KERNEL */
  649 #endif                          /* !__sctp_pcb_h__ */

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