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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1986, 1990, 1993
    5  *      The Regents of the University of California.
    6  * Copyright (c) 2010-2011 Juniper Networks, Inc.
    7  * All rights reserved.
    8  *
    9  * Portions of this software were developed by Robert N. M. Watson under
   10  * contract to Juniper Networks, Inc.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)in_pcb.h    8.1 (Berkeley) 6/10/93
   37  * $FreeBSD$
   38  */
   39 
   40 #ifndef _NETINET_IN_PCB_H_
   41 #define _NETINET_IN_PCB_H_
   42 
   43 #include <sys/queue.h>
   44 #include <sys/epoch.h>
   45 #include <sys/_lock.h>
   46 #include <sys/_mutex.h>
   47 #include <sys/_rwlock.h>
   48 #include <net/route.h>
   49 
   50 #ifdef _KERNEL
   51 #include <sys/lock.h>
   52 #include <sys/rwlock.h>
   53 #include <net/vnet.h>
   54 #include <net/if.h>
   55 #include <net/if_var.h>
   56 #include <vm/uma.h>
   57 #endif
   58 #include <sys/ck.h>
   59 
   60 #define in6pcb          inpcb   /* for KAME src sync over BSD*'s */
   61 #define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */
   62 
   63 /*
   64  * struct inpcb is the common protocol control block structure used in most
   65  * IP transport protocols.
   66  *
   67  * Pointers to local and foreign host table entries, local and foreign socket
   68  * numbers, and pointers up (to a socket structure) and down (to a
   69  * protocol-specific control block) are stored here.
   70  */
   71 CK_LIST_HEAD(inpcbhead, inpcb);
   72 CK_LIST_HEAD(inpcbporthead, inpcbport);
   73 CK_LIST_HEAD(inpcblbgrouphead, inpcblbgroup);
   74 typedef uint64_t        inp_gen_t;
   75 
   76 /*
   77  * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
   78  * So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing
   79  * the following structure.
   80  */
   81 struct in_addr_4in6 {
   82         u_int32_t       ia46_pad32[3];
   83         struct  in_addr ia46_addr4;
   84 };
   85 
   86 union in_dependaddr {
   87         struct in_addr_4in6 id46_addr;
   88         struct in6_addr id6_addr;
   89 };
   90 
   91 /*
   92  * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553.  in_conninfo has
   93  * some extra padding to accomplish this.
   94  * NOTE 2: tcp_syncache.c uses first 5 32-bit words, which identify fport,
   95  * lport, faddr to generate hash, so these fields shouldn't be moved.
   96  */
   97 struct in_endpoints {
   98         u_int16_t       ie_fport;               /* foreign port */
   99         u_int16_t       ie_lport;               /* local port */
  100         /* protocol dependent part, local and foreign addr */
  101         union in_dependaddr ie_dependfaddr;     /* foreign host table entry */
  102         union in_dependaddr ie_dependladdr;     /* local host table entry */
  103 #define ie_faddr        ie_dependfaddr.id46_addr.ia46_addr4
  104 #define ie_laddr        ie_dependladdr.id46_addr.ia46_addr4
  105 #define ie6_faddr       ie_dependfaddr.id6_addr
  106 #define ie6_laddr       ie_dependladdr.id6_addr
  107         u_int32_t       ie6_zoneid;             /* scope zone id */
  108 };
  109 
  110 /*
  111  * XXX The defines for inc_* are hacks and should be changed to direct
  112  * references.
  113  */
  114 struct in_conninfo {
  115         u_int8_t        inc_flags;
  116         u_int8_t        inc_len;
  117         u_int16_t       inc_fibnum;     /* XXX was pad, 16 bits is plenty */
  118         /* protocol dependent part */
  119         struct  in_endpoints inc_ie;
  120 };
  121 
  122 /*
  123  * Flags for inc_flags.
  124  */
  125 #define INC_ISIPV6      0x01
  126 #define INC_IPV6MINMTU  0x02
  127 
  128 #define inc_fport       inc_ie.ie_fport
  129 #define inc_lport       inc_ie.ie_lport
  130 #define inc_faddr       inc_ie.ie_faddr
  131 #define inc_laddr       inc_ie.ie_laddr
  132 #define inc6_faddr      inc_ie.ie6_faddr
  133 #define inc6_laddr      inc_ie.ie6_laddr
  134 #define inc6_zoneid     inc_ie.ie6_zoneid
  135 
  136 #if defined(_KERNEL) || defined(_WANT_INPCB)
  137 /*
  138  * struct inpcb captures the network layer state for TCP, UDP, and raw IPv4 and
  139  * IPv6 sockets.  In the case of TCP and UDP, further per-connection state is
  140  * hung off of inp_ppcb most of the time.  Almost all fields of struct inpcb
  141  * are static after creation or protected by a per-inpcb rwlock, inp_lock.  A
  142  * few fields are protected by multiple locks as indicated in the locking notes
  143  * below.  For these fields, all of the listed locks must be write-locked for
  144  * any modifications.  However, these fields can be safely read while any one of
  145  * the listed locks are read-locked.  This model can permit greater concurrency
  146  * for read operations.  For example, connections can be looked up while only
  147  * holding a read lock on the global pcblist lock.  This is important for
  148  * performance when attempting to find the connection for a packet given its IP
  149  * and port tuple.
  150  *
  151  * One noteworthy exception is that the global pcbinfo lock follows a different
  152  * set of rules in relation to the inp_list field.  Rather than being
  153  * write-locked for modifications and read-locked for list iterations, it must
  154  * be read-locked during modifications and write-locked during list iterations.
  155  * This ensures that the relatively rare global list iterations safely walk a
  156  * stable snapshot of connections while allowing more common list modifications
  157  * to safely grab the pcblist lock just while adding or removing a connection
  158  * from the global list.
  159  *
  160  * Key:
  161  * (b) - Protected by the hpts lock.
  162  * (c) - Constant after initialization
  163  * (e) - Protected by the net_epoch_prempt epoch
  164  * (g) - Protected by the pcbgroup lock
  165  * (i) - Protected by the inpcb lock
  166  * (p) - Protected by the pcbinfo lock for the inpcb
  167  * (l) - Protected by the pcblist lock for the inpcb
  168  * (h) - Protected by the pcbhash lock for the inpcb
  169  * (s) - Protected by another subsystem's locks
  170  * (x) - Undefined locking
  171  * 
  172  * Notes on the tcp_hpts:
  173  * 
  174  * First Hpts lock order is
  175  * 1) INP_WLOCK()
  176  * 2) HPTS_LOCK() i.e. hpts->pmtx 
  177  *
  178  * To insert a TCB on the hpts you *must* be holding the INP_WLOCK(). 
  179  * You may check the inp->inp_in_hpts flag without the hpts lock. 
  180  * The hpts is the only one that will clear this flag holding 
  181  * only the hpts lock. This means that in your tcp_output()
  182  * routine when you test for the inp_in_hpts flag to be 1 
  183  * it may be transitioning to 0 (by the hpts). 
  184  * That's ok since that will just mean an extra call to tcp_output 
  185  * that most likely will find the call you executed
  186  * (when the mis-match occured) will have put the TCB back 
  187  * on the hpts and it will return. If your
  188  * call did not add the inp back to the hpts then you will either
  189  * over-send or the cwnd will block you from sending more.
  190  *
  191  * Note you should also be holding the INP_WLOCK() when you
  192  * call the remove from the hpts as well. Though usually
  193  * you are either doing this from a timer, where you need and have
  194  * the INP_WLOCK() or from destroying your TCB where again
  195  * you should already have the INP_WLOCK().
  196  *
  197  * The inp_hpts_cpu, inp_hpts_cpu_set, inp_input_cpu and 
  198  * inp_input_cpu_set fields are controlled completely by
  199  * the hpts. Do not ever set these. The inp_hpts_cpu_set
  200  * and inp_input_cpu_set fields indicate if the hpts has
  201  * setup the respective cpu field. It is advised if this
  202  * field is 0, to enqueue the packet with the appropriate
  203  * hpts_immediate() call. If the _set field is 1, then
  204  * you may compare the inp_*_cpu field to the curcpu and
  205  * may want to again insert onto the hpts if these fields
  206  * are not equal (i.e. you are not on the expected CPU).
  207  *
  208  * A note on inp_hpts_calls and inp_input_calls, these
  209  * flags are set when the hpts calls either the output
  210  * or do_segment routines respectively. If the routine
  211  * being called wants to use this, then it needs to
  212  * clear the flag before returning. The hpts will not
  213  * clear the flag. The flags can be used to tell if
  214  * the hpts is the function calling the respective
  215  * routine.
  216  *
  217  * A few other notes:
  218  *
  219  * When a read lock is held, stability of the field is guaranteed; to write
  220  * to a field, a write lock must generally be held.
  221  *
  222  * netinet/netinet6-layer code should not assume that the inp_socket pointer
  223  * is safe to dereference without inp_lock being held, even for protocols
  224  * other than TCP (where the inpcb persists during TIMEWAIT even after the
  225  * socket has been freed), or there may be close(2)-related races.
  226  *
  227  * The inp_vflag field is overloaded, and would otherwise ideally be (c).
  228  *
  229  * TODO:  Currently only the TCP stack is leveraging the global pcbinfo lock
  230  * read-lock usage during modification, this model can be applied to other
  231  * protocols (especially SCTP).
  232  */
  233 struct icmp6_filter;
  234 struct inpcbpolicy;
  235 struct m_snd_tag;
  236 struct inpcb {
  237         /* Cache line #1 (amd64) */
  238         CK_LIST_ENTRY(inpcb) inp_hash;  /* [w](h/i) [r](e/i)  hash list */
  239         CK_LIST_ENTRY(inpcb) inp_pcbgrouphash;  /* (g/i) hash list */
  240         struct rwlock   inp_lock;
  241         /* Cache line #2 (amd64) */
  242 #define inp_start_zero  inp_hpts
  243 #define inp_zero_size   (sizeof(struct inpcb) - \
  244                             offsetof(struct inpcb, inp_start_zero))
  245         TAILQ_ENTRY(inpcb) inp_hpts;    /* pacing out queue next lock(b) */
  246 
  247         uint32_t inp_hpts_request;      /* Current hpts request, zero if
  248                                          * fits in the pacing window (i&b). */
  249         /*
  250          * Note the next fields are protected by a
  251          * different lock (hpts-lock). This means that 
  252          * they must correspond in size to the smallest
  253          * protectable bit field (uint8_t on x86, and
  254          * other platfomrs potentially uint32_t?). Also
  255          * since CPU switches can occur at different times the two
  256          * fields can *not* be collapsed into a signal bit field.
  257          */
  258 #if defined(__amd64__) || defined(__i386__)     
  259         volatile uint8_t inp_in_hpts; /* on output hpts (lock b) */
  260         volatile uint8_t inp_in_input; /* on input hpts (lock b) */
  261 #else
  262         volatile uint32_t inp_in_hpts; /* on output hpts (lock b) */
  263         volatile uint32_t inp_in_input; /* on input hpts (lock b) */
  264 #endif
  265         volatile uint16_t  inp_hpts_cpu; /* Lock (i) */
  266         u_int   inp_refcount;           /* (i) refcount */
  267         int     inp_flags;              /* (i) generic IP/datagram flags */
  268         int     inp_flags2;             /* (i) generic IP/datagram flags #2*/
  269         volatile uint16_t  inp_input_cpu; /* Lock (i) */
  270         volatile uint8_t inp_hpts_cpu_set :1,  /* on output hpts (i) */
  271                          inp_input_cpu_set : 1, /* on input hpts (i) */
  272                          inp_hpts_calls :1,     /* (i) from output hpts */
  273                          inp_input_calls :1,    /* (i) from input hpts */
  274                          inp_spare_bits2 : 4;
  275         uint8_t inp_spare_byte;         /* Compiler hole */
  276         void    *inp_ppcb;              /* (i) pointer to per-protocol pcb */
  277         struct  socket *inp_socket;     /* (i) back pointer to socket */
  278         uint32_t         inp_hptsslot;  /* Hpts wheel slot this tcb is Lock(i&b) */
  279         uint32_t         inp_hpts_drop_reas;    /* reason we are dropping the PCB (lock i&b) */
  280         TAILQ_ENTRY(inpcb) inp_input;   /* pacing in  queue next lock(b) */
  281         struct  inpcbinfo *inp_pcbinfo; /* (c) PCB list info */
  282         struct  inpcbgroup *inp_pcbgroup; /* (g/i) PCB group list */
  283         CK_LIST_ENTRY(inpcb) inp_pcbgroup_wild; /* (g/i/h) group wildcard entry */
  284         struct  ucred   *inp_cred;      /* (c) cache of socket cred */
  285         u_int32_t inp_flow;             /* (i) IPv6 flow information */
  286         u_char  inp_vflag;              /* (i) IP version flag (v4/v6) */
  287         u_char  inp_ip_ttl;             /* (i) time to live proto */
  288         u_char  inp_ip_p;               /* (c) protocol proto */
  289         u_char  inp_ip_minttl;          /* (i) minimum TTL or drop */
  290         uint32_t inp_flowid;            /* (x) flow id / queue id */
  291         struct m_snd_tag *inp_snd_tag;  /* (i) send tag for outgoing mbufs */
  292         uint32_t inp_flowtype;          /* (x) M_HASHTYPE value */
  293         uint32_t inp_rss_listen_bucket; /* (x) overridden RSS listen bucket */
  294 
  295         /* Local and foreign ports, local and foreign addr. */
  296         struct  in_conninfo inp_inc;    /* (i) list for PCB's local port */
  297 
  298         /* MAC and IPSEC policy information. */
  299         struct  label *inp_label;       /* (i) MAC label */
  300         struct  inpcbpolicy *inp_sp;    /* (s) for IPSEC */
  301 
  302         /* Protocol-dependent part; options. */
  303         struct {
  304                 u_char  inp_ip_tos;             /* (i) type of service proto */
  305                 struct mbuf             *inp_options;   /* (i) IP options */
  306                 struct ip_moptions      *inp_moptions;  /* (i) mcast options */
  307         };
  308         struct {
  309                 /* (i) IP options */
  310                 struct mbuf             *in6p_options;
  311                 /* (i) IP6 options for outgoing packets */
  312                 struct ip6_pktopts      *in6p_outputopts;
  313                 /* (i) IP multicast options */
  314                 struct ip6_moptions     *in6p_moptions;
  315                 /* (i) ICMPv6 code type filter */
  316                 struct icmp6_filter     *in6p_icmp6filt;
  317                 /* (i) IPV6_CHECKSUM setsockopt */
  318                 int     in6p_cksum;
  319                 short   in6p_hops;
  320         };
  321         CK_LIST_ENTRY(inpcb) inp_portlist;      /* (i/h) */
  322         struct  inpcbport *inp_phd;     /* (i/h) head of this list */
  323         inp_gen_t       inp_gencnt;     /* (c) generation count */
  324         void            *spare_ptr;     /* Spare pointer. */
  325         rt_gen_t        inp_rt_cookie;  /* generation for route entry */
  326         union {                         /* cached L3 information */
  327                 struct route inp_route;
  328                 struct route_in6 inp_route6;
  329         };
  330         CK_LIST_ENTRY(inpcb) inp_list;  /* (p/l) list for all PCBs for proto */
  331                                         /* (e[r]) for list iteration */
  332                                         /* (p[w]/l) for addition/removal */
  333         struct epoch_context inp_epoch_ctx;
  334 };
  335 #endif  /* _KERNEL */
  336 
  337 #define inp_fport       inp_inc.inc_fport
  338 #define inp_lport       inp_inc.inc_lport
  339 #define inp_faddr       inp_inc.inc_faddr
  340 #define inp_laddr       inp_inc.inc_laddr
  341 
  342 #define in6p_faddr      inp_inc.inc6_faddr
  343 #define in6p_laddr      inp_inc.inc6_laddr
  344 #define in6p_zoneid     inp_inc.inc6_zoneid
  345 #define in6p_flowinfo   inp_flow
  346 
  347 #define inp_vnet        inp_pcbinfo->ipi_vnet
  348 
  349 /*
  350  * The range of the generation count, as used in this implementation, is 9e19.
  351  * We would have to create 300 billion connections per second for this number
  352  * to roll over in a year.  This seems sufficiently unlikely that we simply
  353  * don't concern ourselves with that possibility.
  354  */
  355 
  356 /*
  357  * Interface exported to userland by various protocols which use inpcbs.  Hack
  358  * alert -- only define if struct xsocket is in scope.
  359  * Fields prefixed with "xi_" are unique to this structure, and the rest
  360  * match fields in the struct inpcb, to ease coding and porting.
  361  *
  362  * Legend:
  363  * (s) - used by userland utilities in src
  364  * (p) - used by utilities in ports
  365  * (3) - is known to be used by third party software not in ports
  366  * (n) - no known usage
  367  */
  368 #ifdef _SYS_SOCKETVAR_H_
  369 struct xinpcb {
  370         ksize_t         xi_len;                 /* length of this structure */
  371         struct xsocket  xi_socket;              /* (s,p) */
  372         struct in_conninfo inp_inc;             /* (s,p) */
  373         uint64_t        inp_gencnt;             /* (s,p) */
  374         kvaddr_t        inp_ppcb;               /* (s) netstat(1) */
  375         int64_t         inp_spare64[4];
  376         uint32_t        inp_flow;               /* (s) */
  377         uint32_t        inp_flowid;             /* (s) */
  378         uint32_t        inp_flowtype;           /* (s) */
  379         int32_t         inp_flags;              /* (s,p) */
  380         int32_t         inp_flags2;             /* (s) */
  381         int32_t         inp_rss_listen_bucket;  /* (n) */
  382         int32_t         in6p_cksum;             /* (n) */
  383         int32_t         inp_spare32[4];
  384         uint16_t        in6p_hops;              /* (n) */
  385         uint8_t         inp_ip_tos;             /* (n) */
  386         int8_t          pad8;
  387         uint8_t         inp_vflag;              /* (s,p) */
  388         uint8_t         inp_ip_ttl;             /* (n) */
  389         uint8_t         inp_ip_p;               /* (n) */
  390         uint8_t         inp_ip_minttl;          /* (n) */
  391         int8_t          inp_spare8[4];
  392 } __aligned(8);
  393 
  394 struct xinpgen {
  395         ksize_t xig_len;        /* length of this structure */
  396         u_int           xig_count;      /* number of PCBs at this time */
  397         uint32_t        _xig_spare32;
  398         inp_gen_t       xig_gen;        /* generation count at this time */
  399         so_gen_t        xig_sogen;      /* socket generation count this time */
  400         uint64_t        _xig_spare64[4];
  401 } __aligned(8);
  402 #ifdef  _KERNEL
  403 void    in_pcbtoxinpcb(const struct inpcb *, struct xinpcb *);
  404 #endif
  405 #endif /* _SYS_SOCKETVAR_H_ */
  406 
  407 struct inpcbport {
  408         struct epoch_context phd_epoch_ctx;
  409         CK_LIST_ENTRY(inpcbport) phd_hash;
  410         struct inpcbhead phd_pcblist;
  411         u_short phd_port;
  412 };
  413 
  414 struct in_pcblist {
  415         int il_count;
  416         struct epoch_context il_epoch_ctx;
  417         struct inpcbinfo *il_pcbinfo;
  418         struct inpcb *il_inp_list[0];
  419 };
  420 
  421 /*-
  422  * Global data structure for each high-level protocol (UDP, TCP, ...) in both
  423  * IPv4 and IPv6.  Holds inpcb lists and information for managing them.
  424  *
  425  * Each pcbinfo is protected by three locks: ipi_lock, ipi_hash_lock and
  426  * ipi_list_lock:
  427  *  - ipi_lock covering the global pcb list stability during loop iteration,
  428  *  - ipi_hash_lock covering the hashed lookup tables,
  429  *  - ipi_list_lock covering mutable global fields (such as the global
  430  *    pcb list)
  431  *
  432  * The lock order is:
  433  *
  434  *    ipi_lock (before)
  435  *        inpcb locks (before)
  436  *            ipi_list locks (before)
  437  *                {ipi_hash_lock, pcbgroup locks}
  438  *
  439  * Locking key:
  440  *
  441  * (c) Constant or nearly constant after initialisation
  442  * (e) - Protected by the net_epoch_prempt epoch
  443  * (g) Locked by ipi_lock
  444  * (l) Locked by ipi_list_lock
  445  * (h) Read using either net_epoch_preempt or inpcb lock; write requires both ipi_hash_lock and inpcb lock
  446  * (p) Protected by one or more pcbgroup locks
  447  * (x) Synchronisation properties poorly defined
  448  */
  449 struct inpcbinfo {
  450         /*
  451          * Global lock protecting inpcb list modification
  452          */
  453         struct mtx               ipi_lock;
  454 
  455         /*
  456          * Global list of inpcbs on the protocol.
  457          */
  458         struct inpcbhead        *ipi_listhead;          /* [r](e) [w](g/l) */
  459         u_int                    ipi_count;             /* (l) */
  460 
  461         /*
  462          * Generation count -- incremented each time a connection is allocated
  463          * or freed.
  464          */
  465         u_quad_t                 ipi_gencnt;            /* (l) */
  466 
  467         /*
  468          * Fields associated with port lookup and allocation.
  469          */
  470         u_short                  ipi_lastport;          /* (x) */
  471         u_short                  ipi_lastlow;           /* (x) */
  472         u_short                  ipi_lasthi;            /* (x) */
  473 
  474         /*
  475          * UMA zone from which inpcbs are allocated for this protocol.
  476          */
  477         struct  uma_zone        *ipi_zone;              /* (c) */
  478 
  479         /*
  480          * Connection groups associated with this protocol.  These fields are
  481          * constant, but pcbgroup structures themselves are protected by
  482          * per-pcbgroup locks.
  483          */
  484         struct inpcbgroup       *ipi_pcbgroups;         /* (c) */
  485         u_int                    ipi_npcbgroups;        /* (c) */
  486         u_int                    ipi_hashfields;        /* (c) */
  487 
  488         /*
  489          * Global lock protecting modification non-pcbgroup hash lookup tables.
  490          */
  491         struct mtx               ipi_hash_lock;
  492 
  493         /*
  494          * Global hash of inpcbs, hashed by local and foreign addresses and
  495          * port numbers.
  496          */
  497         struct inpcbhead        *ipi_hashbase;          /* (h) */
  498         u_long                   ipi_hashmask;          /* (h) */
  499 
  500         /*
  501          * Global hash of inpcbs, hashed by only local port number.
  502          */
  503         struct inpcbporthead    *ipi_porthashbase;      /* (h) */
  504         u_long                   ipi_porthashmask;      /* (h) */
  505 
  506         /*
  507          * List of wildcard inpcbs for use with pcbgroups.  In the past, was
  508          * per-pcbgroup but is now global.  All pcbgroup locks must be held
  509          * to modify the list, so any is sufficient to read it.
  510          */
  511         struct inpcbhead        *ipi_wildbase;          /* (p) */
  512         u_long                   ipi_wildmask;          /* (p) */
  513 
  514         /*
  515          * Load balance groups used for the SO_REUSEPORT_LB option,
  516          * hashed by local port.
  517          */
  518         struct  inpcblbgrouphead *ipi_lbgrouphashbase;  /* (h) */
  519         u_long                   ipi_lbgrouphashmask;   /* (h) */
  520 
  521         /*
  522          * Pointer to network stack instance
  523          */
  524         struct vnet             *ipi_vnet;              /* (c) */
  525 
  526         /*
  527          * general use 2
  528          */
  529         void                    *ipi_pspare[2];
  530 
  531         /*
  532          * Global lock protecting global inpcb list, inpcb count, etc.
  533          */
  534         struct rwlock            ipi_list_lock;
  535 };
  536 
  537 #ifdef _KERNEL
  538 /*
  539  * Connection groups hold sets of connections that have similar CPU/thread
  540  * affinity.  Each connection belongs to exactly one connection group.
  541  */
  542 struct inpcbgroup {
  543         /*
  544          * Per-connection group hash of inpcbs, hashed by local and foreign
  545          * addresses and port numbers.
  546          */
  547         struct inpcbhead        *ipg_hashbase;          /* (c) */
  548         u_long                   ipg_hashmask;          /* (c) */
  549 
  550         /*
  551          * Notional affinity of this pcbgroup.
  552          */
  553         u_int                    ipg_cpu;               /* (p) */
  554 
  555         /*
  556          * Per-connection group lock, not to be confused with ipi_lock.
  557          * Protects the hash table hung off the group, but also the global
  558          * wildcard list in inpcbinfo.
  559          */
  560         struct mtx               ipg_lock;
  561 } __aligned(CACHE_LINE_SIZE);
  562 
  563 /*
  564  * Load balance groups used for the SO_REUSEPORT_LB socket option. Each group
  565  * (or unique address:port combination) can be re-used at most
  566  * INPCBLBGROUP_SIZMAX (256) times. The inpcbs are stored in il_inp which
  567  * is dynamically resized as processes bind/unbind to that specific group.
  568  */
  569 struct inpcblbgroup {
  570         CK_LIST_ENTRY(inpcblbgroup) il_list;
  571         struct epoch_context il_epoch_ctx;
  572         uint16_t        il_lport;                       /* (c) */
  573         u_char          il_vflag;                       /* (c) */
  574         u_char          il_pad;
  575         uint32_t        il_pad2;
  576         union in_dependaddr il_dependladdr;             /* (c) */
  577 #define il_laddr        il_dependladdr.id46_addr.ia46_addr4
  578 #define il6_laddr       il_dependladdr.id6_addr
  579         uint32_t        il_inpsiz; /* max count in il_inp[] (h) */
  580         uint32_t        il_inpcnt; /* cur count in il_inp[] (h) */
  581         struct inpcb    *il_inp[];                      /* (h) */
  582 };
  583 
  584 #define INP_LOCK_INIT(inp, d, t) \
  585         rw_init_flags(&(inp)->inp_lock, (t), RW_RECURSE |  RW_DUPOK)
  586 #define INP_LOCK_DESTROY(inp)   rw_destroy(&(inp)->inp_lock)
  587 #define INP_RLOCK(inp)          rw_rlock(&(inp)->inp_lock)
  588 #define INP_WLOCK(inp)          rw_wlock(&(inp)->inp_lock)
  589 #define INP_TRY_RLOCK(inp)      rw_try_rlock(&(inp)->inp_lock)
  590 #define INP_TRY_WLOCK(inp)      rw_try_wlock(&(inp)->inp_lock)
  591 #define INP_RUNLOCK(inp)        rw_runlock(&(inp)->inp_lock)
  592 #define INP_WUNLOCK(inp)        rw_wunlock(&(inp)->inp_lock)
  593 #define INP_TRY_UPGRADE(inp)    rw_try_upgrade(&(inp)->inp_lock)
  594 #define INP_DOWNGRADE(inp)      rw_downgrade(&(inp)->inp_lock)
  595 #define INP_WLOCKED(inp)        rw_wowned(&(inp)->inp_lock)
  596 #define INP_LOCK_ASSERT(inp)    rw_assert(&(inp)->inp_lock, RA_LOCKED)
  597 #define INP_RLOCK_ASSERT(inp)   rw_assert(&(inp)->inp_lock, RA_RLOCKED)
  598 #define INP_WLOCK_ASSERT(inp)   rw_assert(&(inp)->inp_lock, RA_WLOCKED)
  599 #define INP_UNLOCK_ASSERT(inp)  rw_assert(&(inp)->inp_lock, RA_UNLOCKED)
  600 
  601 /*
  602  * These locking functions are for inpcb consumers outside of sys/netinet,
  603  * more specifically, they were added for the benefit of TOE drivers. The
  604  * macros are reserved for use by the stack.
  605  */
  606 void inp_wlock(struct inpcb *);
  607 void inp_wunlock(struct inpcb *);
  608 void inp_rlock(struct inpcb *);
  609 void inp_runlock(struct inpcb *);
  610 
  611 #ifdef INVARIANT_SUPPORT
  612 void inp_lock_assert(struct inpcb *);
  613 void inp_unlock_assert(struct inpcb *);
  614 #else
  615 #define inp_lock_assert(inp)    do {} while (0)
  616 #define inp_unlock_assert(inp)  do {} while (0)
  617 #endif
  618 
  619 void    inp_apply_all(void (*func)(struct inpcb *, void *), void *arg);
  620 int     inp_ip_tos_get(const struct inpcb *inp);
  621 void    inp_ip_tos_set(struct inpcb *inp, int val);
  622 struct socket *
  623         inp_inpcbtosocket(struct inpcb *inp);
  624 struct tcpcb *
  625         inp_inpcbtotcpcb(struct inpcb *inp);
  626 void    inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
  627                 uint32_t *faddr, uint16_t *fp);
  628 int     inp_so_options(const struct inpcb *inp);
  629 
  630 #endif /* _KERNEL */
  631 
  632 #define INP_INFO_LOCK_INIT(ipi, d) \
  633         mtx_init(&(ipi)->ipi_lock, (d), NULL, MTX_DEF| MTX_RECURSE)
  634 #define INP_INFO_LOCK_DESTROY(ipi)  mtx_destroy(&(ipi)->ipi_lock)
  635 #define INP_INFO_RLOCK_ET(ipi, et)      NET_EPOCH_ENTER_ET((et))
  636 #define INP_INFO_WLOCK(ipi) mtx_lock(&(ipi)->ipi_lock)
  637 #define INP_INFO_TRY_WLOCK(ipi) mtx_trylock(&(ipi)->ipi_lock)
  638 #define INP_INFO_WLOCKED(ipi)   mtx_owned(&(ipi)->ipi_lock)
  639 #define INP_INFO_RUNLOCK_ET(ipi, et)    NET_EPOCH_EXIT_ET((et))
  640 #define INP_INFO_RUNLOCK_TP(ipi, tp)    NET_EPOCH_EXIT_ET(*(tp)->t_inpcb->inp_et)
  641 #define INP_INFO_WUNLOCK(ipi)   mtx_unlock(&(ipi)->ipi_lock)
  642 #define INP_INFO_LOCK_ASSERT(ipi)       MPASS(in_epoch(net_epoch_preempt) || mtx_owned(&(ipi)->ipi_lock))
  643 #define INP_INFO_RLOCK_ASSERT(ipi)      MPASS(in_epoch(net_epoch_preempt))
  644 #define INP_INFO_WLOCK_ASSERT(ipi)      mtx_assert(&(ipi)->ipi_lock, MA_OWNED)
  645 #define INP_INFO_WUNLOCK_ASSERT(ipi)    \
  646         mtx_assert(&(ipi)->ipi_lock, MA_NOTOWNED)
  647 #define INP_INFO_UNLOCK_ASSERT(ipi)     MPASS(!in_epoch(net_epoch_preempt) && !mtx_owned(&(ipi)->ipi_lock))
  648 
  649 #define INP_LIST_LOCK_INIT(ipi, d) \
  650         rw_init_flags(&(ipi)->ipi_list_lock, (d), 0)
  651 #define INP_LIST_LOCK_DESTROY(ipi)  rw_destroy(&(ipi)->ipi_list_lock)
  652 #define INP_LIST_RLOCK(ipi)     rw_rlock(&(ipi)->ipi_list_lock)
  653 #define INP_LIST_WLOCK(ipi)     rw_wlock(&(ipi)->ipi_list_lock)
  654 #define INP_LIST_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_list_lock)
  655 #define INP_LIST_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_list_lock)
  656 #define INP_LIST_TRY_UPGRADE(ipi)       rw_try_upgrade(&(ipi)->ipi_list_lock)
  657 #define INP_LIST_RUNLOCK(ipi)   rw_runlock(&(ipi)->ipi_list_lock)
  658 #define INP_LIST_WUNLOCK(ipi)   rw_wunlock(&(ipi)->ipi_list_lock)
  659 #define INP_LIST_LOCK_ASSERT(ipi) \
  660         rw_assert(&(ipi)->ipi_list_lock, RA_LOCKED)
  661 #define INP_LIST_RLOCK_ASSERT(ipi) \
  662         rw_assert(&(ipi)->ipi_list_lock, RA_RLOCKED)
  663 #define INP_LIST_WLOCK_ASSERT(ipi) \
  664         rw_assert(&(ipi)->ipi_list_lock, RA_WLOCKED)
  665 #define INP_LIST_UNLOCK_ASSERT(ipi) \
  666         rw_assert(&(ipi)->ipi_list_lock, RA_UNLOCKED)
  667 
  668 #define INP_HASH_LOCK_INIT(ipi, d) mtx_init(&(ipi)->ipi_hash_lock, (d), NULL, MTX_DEF)
  669 #define INP_HASH_LOCK_DESTROY(ipi)      mtx_destroy(&(ipi)->ipi_hash_lock)
  670 #define INP_HASH_RLOCK(ipi)             struct epoch_tracker inp_hash_et; epoch_enter_preempt(net_epoch_preempt, &inp_hash_et)
  671 #define INP_HASH_RLOCK_ET(ipi, et)              epoch_enter_preempt(net_epoch_preempt, &(et))
  672 #define INP_HASH_WLOCK(ipi)             mtx_lock(&(ipi)->ipi_hash_lock)
  673 #define INP_HASH_RUNLOCK(ipi)           NET_EPOCH_EXIT_ET(inp_hash_et)
  674 #define INP_HASH_RUNLOCK_ET(ipi, et)            NET_EPOCH_EXIT_ET((et))
  675 #define INP_HASH_WUNLOCK(ipi)           mtx_unlock(&(ipi)->ipi_hash_lock)
  676 #define INP_HASH_LOCK_ASSERT(ipi)       MPASS(in_epoch(net_epoch_preempt) || mtx_owned(&(ipi)->ipi_hash_lock))
  677 #define INP_HASH_WLOCK_ASSERT(ipi)      mtx_assert(&(ipi)->ipi_hash_lock, MA_OWNED);
  678 
  679 #define INP_GROUP_LOCK_INIT(ipg, d)     mtx_init(&(ipg)->ipg_lock, (d), NULL, \
  680                                             MTX_DEF | MTX_DUPOK)
  681 #define INP_GROUP_LOCK_DESTROY(ipg)     mtx_destroy(&(ipg)->ipg_lock)
  682 
  683 #define INP_GROUP_LOCK(ipg)             mtx_lock(&(ipg)->ipg_lock)
  684 #define INP_GROUP_LOCK_ASSERT(ipg)      mtx_assert(&(ipg)->ipg_lock, MA_OWNED)
  685 #define INP_GROUP_UNLOCK(ipg)           mtx_unlock(&(ipg)->ipg_lock)
  686 
  687 #define INP_PCBHASH(faddr, lport, fport, mask) \
  688         (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
  689 #define INP_PCBPORTHASH(lport, mask) \
  690         (ntohs((lport)) & (mask))
  691 #define INP_PCBLBGROUP_PKTHASH(faddr, lport, fport) \
  692         ((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport)))
  693 #define INP6_PCBHASHKEY(faddr)  ((faddr)->s6_addr32[3])
  694 
  695 /*
  696  * Flags for inp_vflags -- historically version flags only
  697  */
  698 #define INP_IPV4        0x1
  699 #define INP_IPV6        0x2
  700 #define INP_IPV6PROTO   0x4             /* opened under IPv6 protocol */
  701 
  702 /*
  703  * Flags for inp_flags.
  704  */
  705 #define INP_RECVOPTS            0x00000001 /* receive incoming IP options */
  706 #define INP_RECVRETOPTS         0x00000002 /* receive IP options for reply */
  707 #define INP_RECVDSTADDR         0x00000004 /* receive IP dst address */
  708 #define INP_HDRINCL             0x00000008 /* user supplies entire IP header */
  709 #define INP_HIGHPORT            0x00000010 /* user wants "high" port binding */
  710 #define INP_LOWPORT             0x00000020 /* user wants "low" port binding */
  711 #define INP_ANONPORT            0x00000040 /* port chosen for user */
  712 #define INP_RECVIF              0x00000080 /* receive incoming interface */
  713 #define INP_MTUDISC             0x00000100 /* user can do MTU discovery */
  714                                            /* 0x000200 unused: was INP_FAITH */
  715 #define INP_RECVTTL             0x00000400 /* receive incoming IP TTL */
  716 #define INP_DONTFRAG            0x00000800 /* don't fragment packet */
  717 #define INP_BINDANY             0x00001000 /* allow bind to any address */
  718 #define INP_INHASHLIST          0x00002000 /* in_pcbinshash() has been called */
  719 #define INP_RECVTOS             0x00004000 /* receive incoming IP TOS */
  720 #define IN6P_IPV6_V6ONLY        0x00008000 /* restrict AF_INET6 socket for v6 */
  721 #define IN6P_PKTINFO            0x00010000 /* receive IP6 dst and I/F */
  722 #define IN6P_HOPLIMIT           0x00020000 /* receive hoplimit */
  723 #define IN6P_HOPOPTS            0x00040000 /* receive hop-by-hop options */
  724 #define IN6P_DSTOPTS            0x00080000 /* receive dst options after rthdr */
  725 #define IN6P_RTHDR              0x00100000 /* receive routing header */
  726 #define IN6P_RTHDRDSTOPTS       0x00200000 /* receive dstoptions before rthdr */
  727 #define IN6P_TCLASS             0x00400000 /* receive traffic class value */
  728 #define IN6P_AUTOFLOWLABEL      0x00800000 /* attach flowlabel automatically */
  729 #define INP_TIMEWAIT            0x01000000 /* in TIMEWAIT, ppcb is tcptw */
  730 #define INP_ONESBCAST           0x02000000 /* send all-ones broadcast */
  731 #define INP_DROPPED             0x04000000 /* protocol drop flag */
  732 #define INP_SOCKREF             0x08000000 /* strong socket reference */
  733 #define INP_RESERVED_0          0x10000000 /* reserved field */
  734 #define INP_RESERVED_1          0x20000000 /* reserved field */
  735 #define IN6P_RFC2292            0x40000000 /* used RFC2292 API on the socket */
  736 #define IN6P_MTU                0x80000000 /* receive path MTU */
  737 
  738 #define INP_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
  739                                  INP_RECVIF|INP_RECVTTL|INP_RECVTOS|\
  740                                  IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
  741                                  IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
  742                                  IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
  743                                  IN6P_MTU)
  744 
  745 /*
  746  * Flags for inp_flags2.
  747  */
  748 #define INP_2UNUSED1            0x00000001
  749 #define INP_2UNUSED2            0x00000002
  750 #define INP_PCBGROUPWILD        0x00000004 /* in pcbgroup wildcard list */
  751 #define INP_REUSEPORT           0x00000008 /* SO_REUSEPORT option is set */
  752 #define INP_FREED               0x00000010 /* inp itself is not valid */
  753 #define INP_REUSEADDR           0x00000020 /* SO_REUSEADDR option is set */
  754 #define INP_BINDMULTI           0x00000040 /* IP_BINDMULTI option is set */
  755 #define INP_RSS_BUCKET_SET      0x00000080 /* IP_RSS_LISTEN_BUCKET is set */
  756 #define INP_RECVFLOWID          0x00000100 /* populate recv datagram with flow info */
  757 #define INP_RECVRSSBUCKETID     0x00000200 /* populate recv datagram with bucket id */
  758 #define INP_RATE_LIMIT_CHANGED  0x00000400 /* rate limit needs attention */
  759 #define INP_ORIGDSTADDR         0x00000800 /* receive IP dst address/port */
  760 #define INP_CANNOT_DO_ECN       0x00001000 /* The stack does not do ECN */
  761 #define INP_REUSEPORT_LB        0x00002000 /* SO_REUSEPORT_LB option is set */
  762 #define INP_SUPPORTS_MBUFQ      0x00004000 /* Supports the mbuf queue method of LRO */
  763 #define INP_MBUF_QUEUE_READY    0x00008000 /* The transport is pacing, inputs can be queued */
  764 #define INP_DONT_SACK_QUEUE     0x00010000 /* If a sack arrives do not wake me */
  765 #define INP_2PCP_SET            0x00020000 /* If the Eth PCP should be set explicitly */
  766 #define INP_2PCP_BIT0           0x00040000 /* Eth PCP Bit 0 */
  767 #define INP_2PCP_BIT1           0x00080000 /* Eth PCP Bit 1 */
  768 #define INP_2PCP_BIT2           0x00100000 /* Eth PCP Bit 2 */
  769 #define INP_2PCP_BASE   INP_2PCP_BIT0
  770 #define INP_2PCP_MASK   (INP_2PCP_BIT0 | INP_2PCP_BIT1 | INP_2PCP_BIT2)
  771 #define INP_2PCP_SHIFT          18         /* shift PCP field in/out of inp_flags2 */
  772 /*
  773  * Flags passed to in_pcblookup*() functions.
  774  */
  775 #define INPLOOKUP_WILDCARD      0x00000001      /* Allow wildcard sockets. */
  776 #define INPLOOKUP_RLOCKPCB      0x00000002      /* Return inpcb read-locked. */
  777 #define INPLOOKUP_WLOCKPCB      0x00000004      /* Return inpcb write-locked. */
  778 
  779 #define INPLOOKUP_MASK  (INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB | \
  780                             INPLOOKUP_WLOCKPCB)
  781 
  782 #define sotoinpcb(so)   ((struct inpcb *)(so)->so_pcb)
  783 #define sotoin6pcb(so)  sotoinpcb(so) /* for KAME src sync over BSD*'s */
  784 
  785 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
  786 
  787 #define INP_CHECK_SOCKAF(so, af)        (INP_SOCKAF(so) == af)
  788 
  789 /*
  790  * Constants for pcbinfo.ipi_hashfields.
  791  */
  792 #define IPI_HASHFIELDS_NONE     0
  793 #define IPI_HASHFIELDS_2TUPLE   1
  794 #define IPI_HASHFIELDS_4TUPLE   2
  795 
  796 #ifdef _KERNEL
  797 VNET_DECLARE(int, ipport_reservedhigh);
  798 VNET_DECLARE(int, ipport_reservedlow);
  799 VNET_DECLARE(int, ipport_lowfirstauto);
  800 VNET_DECLARE(int, ipport_lowlastauto);
  801 VNET_DECLARE(int, ipport_firstauto);
  802 VNET_DECLARE(int, ipport_lastauto);
  803 VNET_DECLARE(int, ipport_hifirstauto);
  804 VNET_DECLARE(int, ipport_hilastauto);
  805 VNET_DECLARE(int, ipport_randomized);
  806 VNET_DECLARE(int, ipport_randomcps);
  807 VNET_DECLARE(int, ipport_randomtime);
  808 VNET_DECLARE(int, ipport_stoprandom);
  809 VNET_DECLARE(int, ipport_tcpallocs);
  810 
  811 #define V_ipport_reservedhigh   VNET(ipport_reservedhigh)
  812 #define V_ipport_reservedlow    VNET(ipport_reservedlow)
  813 #define V_ipport_lowfirstauto   VNET(ipport_lowfirstauto)
  814 #define V_ipport_lowlastauto    VNET(ipport_lowlastauto)
  815 #define V_ipport_firstauto      VNET(ipport_firstauto)
  816 #define V_ipport_lastauto       VNET(ipport_lastauto)
  817 #define V_ipport_hifirstauto    VNET(ipport_hifirstauto)
  818 #define V_ipport_hilastauto     VNET(ipport_hilastauto)
  819 #define V_ipport_randomized     VNET(ipport_randomized)
  820 #define V_ipport_randomcps      VNET(ipport_randomcps)
  821 #define V_ipport_randomtime     VNET(ipport_randomtime)
  822 #define V_ipport_stoprandom     VNET(ipport_stoprandom)
  823 #define V_ipport_tcpallocs      VNET(ipport_tcpallocs)
  824 
  825 void    in_pcbinfo_destroy(struct inpcbinfo *);
  826 void    in_pcbinfo_init(struct inpcbinfo *, const char *, struct inpcbhead *,
  827             int, int, char *, uma_init, u_int);
  828 
  829 int     in_pcbbind_check_bindmulti(const struct inpcb *ni,
  830             const struct inpcb *oi);
  831 
  832 struct inpcbgroup *
  833         in_pcbgroup_byhash(struct inpcbinfo *, u_int, uint32_t);
  834 struct inpcbgroup *
  835         in_pcbgroup_byinpcb(struct inpcb *);
  836 struct inpcbgroup *
  837         in_pcbgroup_bytuple(struct inpcbinfo *, struct in_addr, u_short,
  838             struct in_addr, u_short);
  839 void    in_pcbgroup_destroy(struct inpcbinfo *);
  840 int     in_pcbgroup_enabled(struct inpcbinfo *);
  841 void    in_pcbgroup_init(struct inpcbinfo *, u_int, int);
  842 void    in_pcbgroup_remove(struct inpcb *);
  843 void    in_pcbgroup_update(struct inpcb *);
  844 void    in_pcbgroup_update_mbuf(struct inpcb *, struct mbuf *);
  845 
  846 void    in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *);
  847 int     in_pcballoc(struct socket *, struct inpcbinfo *);
  848 int     in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *);
  849 int     in_pcb_lport_dest(struct inpcb *inp, struct sockaddr *lsa,
  850             u_short *lportp, struct sockaddr *fsa, u_short fport,
  851             struct ucred *cred, int lookupflags);
  852 int     in_pcb_lport(struct inpcb *, struct in_addr *, u_short *,
  853             struct ucred *, int);
  854 int     in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
  855             u_short *, struct ucred *);
  856 int     in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *);
  857 int     in_pcbconnect_mbuf(struct inpcb *, struct sockaddr *, struct ucred *,
  858             struct mbuf *, bool);
  859 int     in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
  860             u_short *, in_addr_t *, u_short *, struct inpcb **,
  861             struct ucred *);
  862 void    in_pcbdetach(struct inpcb *);
  863 void    in_pcbdisconnect(struct inpcb *);
  864 void    in_pcbdrop(struct inpcb *);
  865 void    in_pcbfree(struct inpcb *);
  866 int     in_pcbinshash(struct inpcb *);
  867 int     in_pcbinshash_mbuf(struct inpcb *, struct mbuf *);
  868 int     in_pcbladdr(struct inpcb *, struct in_addr *, struct in_addr *,
  869             struct ucred *);
  870 struct inpcb *
  871         in_pcblookup_local(struct inpcbinfo *,
  872             struct in_addr, u_short, int, struct ucred *);
  873 struct inpcb *
  874         in_pcblookup(struct inpcbinfo *, struct in_addr, u_int,
  875             struct in_addr, u_int, int, struct ifnet *);
  876 struct inpcb *
  877         in_pcblookup_mbuf(struct inpcbinfo *, struct in_addr, u_int,
  878             struct in_addr, u_int, int, struct ifnet *, struct mbuf *);
  879 void    in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr,
  880             int, struct inpcb *(*)(struct inpcb *, int));
  881 void    in_pcbref(struct inpcb *);
  882 void    in_pcbrehash(struct inpcb *);
  883 void    in_pcbrehash_mbuf(struct inpcb *, struct mbuf *);
  884 int     in_pcbrele(struct inpcb *);
  885 int     in_pcbrele_rlocked(struct inpcb *);
  886 int     in_pcbrele_wlocked(struct inpcb *);
  887 void    in_pcblist_rele_rlocked(epoch_context_t ctx);
  888 void    in_losing(struct inpcb *);
  889 void    in_pcbsetsolabel(struct socket *so);
  890 int     in_getpeeraddr(struct socket *so, struct sockaddr **nam);
  891 int     in_getsockaddr(struct socket *so, struct sockaddr **nam);
  892 struct sockaddr *
  893         in_sockaddr(in_port_t port, struct in_addr *addr);
  894 void    in_pcbsosetlabel(struct socket *so);
  895 #ifdef RATELIMIT
  896 int     in_pcbattach_txrtlmt(struct inpcb *, struct ifnet *, uint32_t, uint32_t, uint32_t);
  897 void    in_pcbdetach_txrtlmt(struct inpcb *);
  898 int     in_pcbmodify_txrtlmt(struct inpcb *, uint32_t);
  899 int     in_pcbquery_txrtlmt(struct inpcb *, uint32_t *);
  900 int     in_pcbquery_txrlevel(struct inpcb *, uint32_t *);
  901 void    in_pcboutput_txrtlmt(struct inpcb *, struct ifnet *, struct mbuf *);
  902 void    in_pcboutput_eagain(struct inpcb *);
  903 #endif
  904 #endif /* _KERNEL */
  905 
  906 #endif /* !_NETINET_IN_PCB_H_ */

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