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  * Copyright (c) 1982, 1986, 1990, 1993
    3  *      The Regents of the University of California.
    4  * Copyright (c) 2010-2011 Juniper Networks, Inc.
    5  * All rights reserved.
    6  *
    7  * Portions of this software were developed by Robert N. M. Watson under
    8  * contract to Juniper Networks, Inc.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)in_pcb.h    8.1 (Berkeley) 6/10/93
   35  * $FreeBSD: releng/9.1/sys/netinet/in_pcb.h 237910 2012-07-01 08:47:15Z tuexen $
   36  */
   37 
   38 #ifndef _NETINET_IN_PCB_H_
   39 #define _NETINET_IN_PCB_H_
   40 
   41 #include <sys/queue.h>
   42 #include <sys/_lock.h>
   43 #include <sys/_mutex.h>
   44 #include <sys/_rwlock.h>
   45 
   46 #ifdef _KERNEL
   47 #include <sys/lock.h>
   48 #include <sys/rwlock.h>
   49 #include <net/vnet.h>
   50 #include <vm/uma.h>
   51 #endif
   52 
   53 #define in6pcb          inpcb   /* for KAME src sync over BSD*'s */
   54 #define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */
   55 struct inpcbpolicy;
   56 
   57 /*
   58  * struct inpcb is the common protocol control block structure used in most
   59  * IP transport protocols.
   60  *
   61  * Pointers to local and foreign host table entries, local and foreign socket
   62  * numbers, and pointers up (to a socket structure) and down (to a
   63  * protocol-specific control block) are stored here.
   64  */
   65 LIST_HEAD(inpcbhead, inpcb);
   66 LIST_HEAD(inpcbporthead, inpcbport);
   67 typedef u_quad_t        inp_gen_t;
   68 
   69 /*
   70  * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
   71  * So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing
   72  * the following structure.
   73  */
   74 struct in_addr_4in6 {
   75         u_int32_t       ia46_pad32[3];
   76         struct  in_addr ia46_addr4;
   77 };
   78 
   79 /*
   80  * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553.  in_conninfo has
   81  * some extra padding to accomplish this.
   82  */
   83 struct in_endpoints {
   84         u_int16_t       ie_fport;               /* foreign port */
   85         u_int16_t       ie_lport;               /* local port */
   86         /* protocol dependent part, local and foreign addr */
   87         union {
   88                 /* foreign host table entry */
   89                 struct  in_addr_4in6 ie46_foreign;
   90                 struct  in6_addr ie6_foreign;
   91         } ie_dependfaddr;
   92         union {
   93                 /* local host table entry */
   94                 struct  in_addr_4in6 ie46_local;
   95                 struct  in6_addr ie6_local;
   96         } ie_dependladdr;
   97 };
   98 #define ie_faddr        ie_dependfaddr.ie46_foreign.ia46_addr4
   99 #define ie_laddr        ie_dependladdr.ie46_local.ia46_addr4
  100 #define ie6_faddr       ie_dependfaddr.ie6_foreign
  101 #define ie6_laddr       ie_dependladdr.ie6_local
  102 
  103 /*
  104  * XXX The defines for inc_* are hacks and should be changed to direct
  105  * references.
  106  */
  107 struct in_conninfo {
  108         u_int8_t        inc_flags;
  109         u_int8_t        inc_len;
  110         u_int16_t       inc_fibnum;     /* XXX was pad, 16 bits is plenty */
  111         /* protocol dependent part */
  112         struct  in_endpoints inc_ie;
  113 };
  114 
  115 /*
  116  * Flags for inc_flags.
  117  */
  118 #define INC_ISIPV6      0x01
  119 
  120 #define inc_isipv6      inc_flags       /* temp compatability */
  121 #define inc_fport       inc_ie.ie_fport
  122 #define inc_lport       inc_ie.ie_lport
  123 #define inc_faddr       inc_ie.ie_faddr
  124 #define inc_laddr       inc_ie.ie_laddr
  125 #define inc6_faddr      inc_ie.ie6_faddr
  126 #define inc6_laddr      inc_ie.ie6_laddr
  127 
  128 struct  icmp6_filter;
  129 
  130 /*-
  131  * struct inpcb captures the network layer state for TCP, UDP, and raw IPv4
  132  * and IPv6 sockets.  In the case of TCP, further per-connection state is
  133  * hung off of inp_ppcb most of the time.  Almost all fields of struct inpcb
  134  * are static after creation or protected by a per-inpcb rwlock, inp_lock.  A
  135  * few fields also require the global pcbinfo lock for the inpcb to be held,
  136  * when modified, such as the global connection lists and hashes, as well as
  137  * binding information (which affects which hash a connection is on).  This
  138  * model means that connections can be looked up without holding the
  139  * per-connection lock, which is important for performance when attempting to
  140  * find the connection for a packet given its IP and port tuple.  Writing to
  141  * these fields that write locks be held on both the inpcb and global locks.
  142  *
  143  * Key:
  144  * (c) - Constant after initialization
  145  * (g) - Protected by the pcbgroup lock
  146  * (i) - Protected by the inpcb lock
  147  * (p) - Protected by the pcbinfo lock for the inpcb
  148  * (s) - Protected by another subsystem's locks
  149  * (x) - Undefined locking
  150  *
  151  * A few other notes:
  152  *
  153  * When a read lock is held, stability of the field is guaranteed; to write
  154  * to a field, a write lock must generally be held.
  155  *
  156  * netinet/netinet6-layer code should not assume that the inp_socket pointer
  157  * is safe to dereference without inp_lock being held, even for protocols
  158  * other than TCP (where the inpcb persists during TIMEWAIT even after the
  159  * socket has been freed), or there may be close(2)-related races.
  160  *
  161  * The inp_vflag field is overloaded, and would otherwise ideally be (c).
  162  */
  163 struct inpcb {
  164         LIST_ENTRY(inpcb) inp_hash;     /* (i/p) hash list */
  165         LIST_ENTRY(inpcb) inp_pcbgrouphash;     /* (g/i) hash list */
  166         LIST_ENTRY(inpcb) inp_list;     /* (i/p) list for all PCBs for proto */
  167         void    *inp_ppcb;              /* (i) pointer to per-protocol pcb */
  168         struct  inpcbinfo *inp_pcbinfo; /* (c) PCB list info */
  169         struct  inpcbgroup *inp_pcbgroup; /* (g/i) PCB group list */
  170         LIST_ENTRY(inpcb) inp_pcbgroup_wild; /* (g/i/p) group wildcard entry */
  171         struct  socket *inp_socket;     /* (i) back pointer to socket */
  172         struct  ucred   *inp_cred;      /* (c) cache of socket cred */
  173         u_int32_t inp_flow;             /* (i) IPv6 flow information */
  174         int     inp_flags;              /* (i) generic IP/datagram flags */
  175         int     inp_flags2;             /* (i) generic IP/datagram flags #2*/
  176         u_char  inp_vflag;              /* (i) IP version flag (v4/v6) */
  177         u_char  inp_ip_ttl;             /* (i) time to live proto */
  178         u_char  inp_ip_p;               /* (c) protocol proto */
  179         u_char  inp_ip_minttl;          /* (i) minimum TTL or drop */
  180         uint32_t inp_flowid;            /* (x) flow id / queue id */
  181         u_int   inp_refcount;           /* (i) refcount */
  182         void    *inp_pspare[5];         /* (x) route caching / general use */
  183         u_int   inp_ispare[6];          /* (x) route caching / user cookie /
  184                                          *     general use */
  185 
  186         /* Local and foreign ports, local and foreign addr. */
  187         struct  in_conninfo inp_inc;    /* (i/p) list for PCB's local port */
  188 
  189         /* MAC and IPSEC policy information. */
  190         struct  label *inp_label;       /* (i) MAC label */
  191         struct  inpcbpolicy *inp_sp;    /* (s) for IPSEC */
  192 
  193         /* Protocol-dependent part; options. */
  194         struct {
  195                 u_char  inp4_ip_tos;            /* (i) type of service proto */
  196                 struct  mbuf *inp4_options;     /* (i) IP options */
  197                 struct  ip_moptions *inp4_moptions; /* (i) IP mcast options */
  198         } inp_depend4;
  199         struct {
  200                 /* (i) IP options */
  201                 struct  mbuf *inp6_options;
  202                 /* (i) IP6 options for outgoing packets */
  203                 struct  ip6_pktopts *inp6_outputopts;
  204                 /* (i) IP multicast options */
  205                 struct  ip6_moptions *inp6_moptions;
  206                 /* (i) ICMPv6 code type filter */
  207                 struct  icmp6_filter *inp6_icmp6filt;
  208                 /* (i) IPV6_CHECKSUM setsockopt */
  209                 int     inp6_cksum;
  210                 short   inp6_hops;
  211         } inp_depend6;
  212         LIST_ENTRY(inpcb) inp_portlist; /* (i/p) */
  213         struct  inpcbport *inp_phd;     /* (i/p) head of this list */
  214 #define inp_zero_size offsetof(struct inpcb, inp_gencnt)
  215         inp_gen_t       inp_gencnt;     /* (c) generation count */
  216         struct llentry  *inp_lle;       /* cached L2 information */
  217         struct rtentry  *inp_rt;        /* cached L3 information */
  218         struct rwlock   inp_lock;
  219 };
  220 #define inp_fport       inp_inc.inc_fport
  221 #define inp_lport       inp_inc.inc_lport
  222 #define inp_faddr       inp_inc.inc_faddr
  223 #define inp_laddr       inp_inc.inc_laddr
  224 #define inp_ip_tos      inp_depend4.inp4_ip_tos
  225 #define inp_options     inp_depend4.inp4_options
  226 #define inp_moptions    inp_depend4.inp4_moptions
  227 
  228 #define in6p_faddr      inp_inc.inc6_faddr
  229 #define in6p_laddr      inp_inc.inc6_laddr
  230 #define in6p_hops       inp_depend6.inp6_hops   /* default hop limit */
  231 #define in6p_flowinfo   inp_flow
  232 #define in6p_options    inp_depend6.inp6_options
  233 #define in6p_outputopts inp_depend6.inp6_outputopts
  234 #define in6p_moptions   inp_depend6.inp6_moptions
  235 #define in6p_icmp6filt  inp_depend6.inp6_icmp6filt
  236 #define in6p_cksum      inp_depend6.inp6_cksum
  237 
  238 #define inp_vnet        inp_pcbinfo->ipi_vnet
  239 
  240 /*
  241  * The range of the generation count, as used in this implementation, is 9e19.
  242  * We would have to create 300 billion connections per second for this number
  243  * to roll over in a year.  This seems sufficiently unlikely that we simply
  244  * don't concern ourselves with that possibility.
  245  */
  246 
  247 /*
  248  * Interface exported to userland by various protocols which use inpcbs.  Hack
  249  * alert -- only define if struct xsocket is in scope.
  250  */
  251 #ifdef _SYS_SOCKETVAR_H_
  252 struct  xinpcb {
  253         size_t  xi_len;         /* length of this structure */
  254         struct  inpcb xi_inp;
  255         struct  xsocket xi_socket;
  256         u_quad_t        xi_alignment_hack;
  257 };
  258 
  259 struct  xinpgen {
  260         size_t  xig_len;        /* length of this structure */
  261         u_int   xig_count;      /* number of PCBs at this time */
  262         inp_gen_t xig_gen;      /* generation count at this time */
  263         so_gen_t xig_sogen;     /* socket generation count at this time */
  264 };
  265 #endif /* _SYS_SOCKETVAR_H_ */
  266 
  267 struct inpcbport {
  268         LIST_ENTRY(inpcbport) phd_hash;
  269         struct inpcbhead phd_pcblist;
  270         u_short phd_port;
  271 };
  272 
  273 /*-
  274  * Global data structure for each high-level protocol (UDP, TCP, ...) in both
  275  * IPv4 and IPv6.  Holds inpcb lists and information for managing them.
  276  *
  277  * Each pcbinfo is protected by two locks: ipi_lock and ipi_hash_lock,
  278  * the former covering mutable global fields (such as the global pcb list),
  279  * and the latter covering the hashed lookup tables.  The lock order is:
  280  *
  281  *    ipi_lock (before) inpcb locks (before) {ipi_hash_lock, pcbgroup locks}
  282  *
  283  * Locking key:
  284  *
  285  * (c) Constant or nearly constant after initialisation
  286  * (g) Locked by ipi_lock
  287  * (h) Read using either ipi_hash_lock or inpcb lock; write requires both
  288  * (p) Protected by one or more pcbgroup locks
  289  * (x) Synchronisation properties poorly defined
  290  */
  291 struct inpcbinfo {
  292         /*
  293          * Global lock protecting global inpcb list, inpcb count, etc.
  294          */
  295         struct rwlock            ipi_lock;
  296 
  297         /*
  298          * Global list of inpcbs on the protocol.
  299          */
  300         struct inpcbhead        *ipi_listhead;          /* (g) */
  301         u_int                    ipi_count;             /* (g) */
  302 
  303         /*
  304          * Generation count -- incremented each time a connection is allocated
  305          * or freed.
  306          */
  307         u_quad_t                 ipi_gencnt;            /* (g) */
  308 
  309         /*
  310          * Fields associated with port lookup and allocation.
  311          */
  312         u_short                  ipi_lastport;          /* (x) */
  313         u_short                  ipi_lastlow;           /* (x) */
  314         u_short                  ipi_lasthi;            /* (x) */
  315 
  316         /*
  317          * UMA zone from which inpcbs are allocated for this protocol.
  318          */
  319         struct  uma_zone        *ipi_zone;              /* (c) */
  320 
  321         /*
  322          * Connection groups associated with this protocol.  These fields are
  323          * constant, but pcbgroup structures themselves are protected by
  324          * per-pcbgroup locks.
  325          */
  326         struct inpcbgroup       *ipi_pcbgroups;         /* (c) */
  327         u_int                    ipi_npcbgroups;        /* (c) */
  328         u_int                    ipi_hashfields;        /* (c) */
  329 
  330         /*
  331          * Global lock protecting non-pcbgroup hash lookup tables.
  332          */
  333         struct rwlock            ipi_hash_lock;
  334 
  335         /*
  336          * Global hash of inpcbs, hashed by local and foreign addresses and
  337          * port numbers.
  338          */
  339         struct inpcbhead        *ipi_hashbase;          /* (h) */
  340         u_long                   ipi_hashmask;          /* (h) */
  341 
  342         /*
  343          * Global hash of inpcbs, hashed by only local port number.
  344          */
  345         struct inpcbporthead    *ipi_porthashbase;      /* (h) */
  346         u_long                   ipi_porthashmask;      /* (h) */
  347 
  348         /*
  349          * List of wildcard inpcbs for use with pcbgroups.  In the past, was
  350          * per-pcbgroup but is now global.  All pcbgroup locks must be held
  351          * to modify the list, so any is sufficient to read it.
  352          */
  353         struct inpcbhead        *ipi_wildbase;          /* (p) */
  354         u_long                   ipi_wildmask;          /* (p) */
  355 
  356         /*
  357          * Pointer to network stack instance
  358          */
  359         struct vnet             *ipi_vnet;              /* (c) */
  360 
  361         /*
  362          * general use 2
  363          */
  364         void                    *ipi_pspare[2];
  365 };
  366 
  367 #ifdef _KERNEL
  368 /*
  369  * Connection groups hold sets of connections that have similar CPU/thread
  370  * affinity.  Each connection belongs to exactly one connection group.
  371  */
  372 struct inpcbgroup {
  373         /*
  374          * Per-connection group hash of inpcbs, hashed by local and foreign
  375          * addresses and port numbers.
  376          */
  377         struct inpcbhead        *ipg_hashbase;          /* (c) */
  378         u_long                   ipg_hashmask;          /* (c) */
  379 
  380         /*
  381          * Notional affinity of this pcbgroup.
  382          */
  383         u_int                    ipg_cpu;               /* (p) */
  384 
  385         /*
  386          * Per-connection group lock, not to be confused with ipi_lock.
  387          * Protects the hash table hung off the group, but also the global
  388          * wildcard list in inpcbinfo.
  389          */
  390         struct mtx               ipg_lock;
  391 } __aligned(CACHE_LINE_SIZE);
  392 
  393 #define INP_LOCK_INIT(inp, d, t) \
  394         rw_init_flags(&(inp)->inp_lock, (t), RW_RECURSE |  RW_DUPOK)
  395 #define INP_LOCK_DESTROY(inp)   rw_destroy(&(inp)->inp_lock)
  396 #define INP_RLOCK(inp)          rw_rlock(&(inp)->inp_lock)
  397 #define INP_WLOCK(inp)          rw_wlock(&(inp)->inp_lock)
  398 #define INP_TRY_RLOCK(inp)      rw_try_rlock(&(inp)->inp_lock)
  399 #define INP_TRY_WLOCK(inp)      rw_try_wlock(&(inp)->inp_lock)
  400 #define INP_RUNLOCK(inp)        rw_runlock(&(inp)->inp_lock)
  401 #define INP_WUNLOCK(inp)        rw_wunlock(&(inp)->inp_lock)
  402 #define INP_TRY_UPGRADE(inp)    rw_try_upgrade(&(inp)->inp_lock)
  403 #define INP_DOWNGRADE(inp)      rw_downgrade(&(inp)->inp_lock)
  404 #define INP_WLOCKED(inp)        rw_wowned(&(inp)->inp_lock)
  405 #define INP_LOCK_ASSERT(inp)    rw_assert(&(inp)->inp_lock, RA_LOCKED)
  406 #define INP_RLOCK_ASSERT(inp)   rw_assert(&(inp)->inp_lock, RA_RLOCKED)
  407 #define INP_WLOCK_ASSERT(inp)   rw_assert(&(inp)->inp_lock, RA_WLOCKED)
  408 #define INP_UNLOCK_ASSERT(inp)  rw_assert(&(inp)->inp_lock, RA_UNLOCKED)
  409 
  410 /*
  411  * These locking functions are for inpcb consumers outside of sys/netinet,
  412  * more specifically, they were added for the benefit of TOE drivers. The
  413  * macros are reserved for use by the stack.
  414  */
  415 void inp_wlock(struct inpcb *);
  416 void inp_wunlock(struct inpcb *);
  417 void inp_rlock(struct inpcb *);
  418 void inp_runlock(struct inpcb *);
  419 
  420 #ifdef INVARIANTS
  421 void inp_lock_assert(struct inpcb *);
  422 void inp_unlock_assert(struct inpcb *);
  423 #else
  424 static __inline void
  425 inp_lock_assert(struct inpcb *inp __unused)
  426 {
  427 }
  428 
  429 static __inline void
  430 inp_unlock_assert(struct inpcb *inp __unused)
  431 {
  432 }
  433 
  434 #endif
  435 
  436 void    inp_apply_all(void (*func)(struct inpcb *, void *), void *arg);
  437 int     inp_ip_tos_get(const struct inpcb *inp);
  438 void    inp_ip_tos_set(struct inpcb *inp, int val);
  439 struct socket *
  440         inp_inpcbtosocket(struct inpcb *inp);
  441 struct tcpcb *
  442         inp_inpcbtotcpcb(struct inpcb *inp);
  443 void    inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
  444                 uint32_t *faddr, uint16_t *fp);
  445 
  446 #endif /* _KERNEL */
  447 
  448 #define INP_INFO_LOCK_INIT(ipi, d) \
  449         rw_init_flags(&(ipi)->ipi_lock, (d), RW_RECURSE)
  450 #define INP_INFO_LOCK_DESTROY(ipi)  rw_destroy(&(ipi)->ipi_lock)
  451 #define INP_INFO_RLOCK(ipi)     rw_rlock(&(ipi)->ipi_lock)
  452 #define INP_INFO_WLOCK(ipi)     rw_wlock(&(ipi)->ipi_lock)
  453 #define INP_INFO_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_lock)
  454 #define INP_INFO_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_lock)
  455 #define INP_INFO_TRY_UPGRADE(ipi)       rw_try_upgrade(&(ipi)->ipi_lock)
  456 #define INP_INFO_RUNLOCK(ipi)   rw_runlock(&(ipi)->ipi_lock)
  457 #define INP_INFO_WUNLOCK(ipi)   rw_wunlock(&(ipi)->ipi_lock)
  458 #define INP_INFO_LOCK_ASSERT(ipi)       rw_assert(&(ipi)->ipi_lock, RA_LOCKED)
  459 #define INP_INFO_RLOCK_ASSERT(ipi)      rw_assert(&(ipi)->ipi_lock, RA_RLOCKED)
  460 #define INP_INFO_WLOCK_ASSERT(ipi)      rw_assert(&(ipi)->ipi_lock, RA_WLOCKED)
  461 #define INP_INFO_UNLOCK_ASSERT(ipi)     rw_assert(&(ipi)->ipi_lock, RA_UNLOCKED)
  462 
  463 #define INP_HASH_LOCK_INIT(ipi, d) \
  464         rw_init_flags(&(ipi)->ipi_hash_lock, (d), 0)
  465 #define INP_HASH_LOCK_DESTROY(ipi)      rw_destroy(&(ipi)->ipi_hash_lock)
  466 #define INP_HASH_RLOCK(ipi)             rw_rlock(&(ipi)->ipi_hash_lock)
  467 #define INP_HASH_WLOCK(ipi)             rw_wlock(&(ipi)->ipi_hash_lock)
  468 #define INP_HASH_RUNLOCK(ipi)           rw_runlock(&(ipi)->ipi_hash_lock)
  469 #define INP_HASH_WUNLOCK(ipi)           rw_wunlock(&(ipi)->ipi_hash_lock)
  470 #define INP_HASH_LOCK_ASSERT(ipi)       rw_assert(&(ipi)->ipi_hash_lock, \
  471                                             RA_LOCKED)
  472 #define INP_HASH_WLOCK_ASSERT(ipi)      rw_assert(&(ipi)->ipi_hash_lock, \
  473                                             RA_WLOCKED)
  474 
  475 #define INP_GROUP_LOCK_INIT(ipg, d)     mtx_init(&(ipg)->ipg_lock, (d), NULL, \
  476                                             MTX_DEF | MTX_DUPOK)
  477 #define INP_GROUP_LOCK_DESTROY(ipg)     mtx_destroy(&(ipg)->ipg_lock)
  478 
  479 #define INP_GROUP_LOCK(ipg)             mtx_lock(&(ipg)->ipg_lock)
  480 #define INP_GROUP_LOCK_ASSERT(ipg)      mtx_assert(&(ipg)->ipg_lock, MA_OWNED)
  481 #define INP_GROUP_UNLOCK(ipg)           mtx_unlock(&(ipg)->ipg_lock)
  482 
  483 #define INP_PCBHASH(faddr, lport, fport, mask) \
  484         (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
  485 #define INP_PCBPORTHASH(lport, mask) \
  486         (ntohs((lport)) & (mask))
  487 
  488 /*
  489  * Flags for inp_vflags -- historically version flags only
  490  */
  491 #define INP_IPV4        0x1
  492 #define INP_IPV6        0x2
  493 #define INP_IPV6PROTO   0x4             /* opened under IPv6 protocol */
  494 
  495 /*
  496  * Flags for inp_flags.
  497  */
  498 #define INP_RECVOPTS            0x00000001 /* receive incoming IP options */
  499 #define INP_RECVRETOPTS         0x00000002 /* receive IP options for reply */
  500 #define INP_RECVDSTADDR         0x00000004 /* receive IP dst address */
  501 #define INP_HDRINCL             0x00000008 /* user supplies entire IP header */
  502 #define INP_HIGHPORT            0x00000010 /* user wants "high" port binding */
  503 #define INP_LOWPORT             0x00000020 /* user wants "low" port binding */
  504 #define INP_ANONPORT            0x00000040 /* port chosen for user */
  505 #define INP_RECVIF              0x00000080 /* receive incoming interface */
  506 #define INP_MTUDISC             0x00000100 /* user can do MTU discovery */
  507 #define INP_FAITH               0x00000200 /* accept FAITH'ed connections */
  508 #define INP_RECVTTL             0x00000400 /* receive incoming IP TTL */
  509 #define INP_DONTFRAG            0x00000800 /* don't fragment packet */
  510 #define INP_BINDANY             0x00001000 /* allow bind to any address */
  511 #define INP_INHASHLIST          0x00002000 /* in_pcbinshash() has been called */
  512 #define INP_RECVTOS             0x00004000 /* receive incoming IP TOS */
  513 #define IN6P_IPV6_V6ONLY        0x00008000 /* restrict AF_INET6 socket for v6 */
  514 #define IN6P_PKTINFO            0x00010000 /* receive IP6 dst and I/F */
  515 #define IN6P_HOPLIMIT           0x00020000 /* receive hoplimit */
  516 #define IN6P_HOPOPTS            0x00040000 /* receive hop-by-hop options */
  517 #define IN6P_DSTOPTS            0x00080000 /* receive dst options after rthdr */
  518 #define IN6P_RTHDR              0x00100000 /* receive routing header */
  519 #define IN6P_RTHDRDSTOPTS       0x00200000 /* receive dstoptions before rthdr */
  520 #define IN6P_TCLASS             0x00400000 /* receive traffic class value */
  521 #define IN6P_AUTOFLOWLABEL      0x00800000 /* attach flowlabel automatically */
  522 #define INP_TIMEWAIT            0x01000000 /* in TIMEWAIT, ppcb is tcptw */
  523 #define INP_ONESBCAST           0x02000000 /* send all-ones broadcast */
  524 #define INP_DROPPED             0x04000000 /* protocol drop flag */
  525 #define INP_SOCKREF             0x08000000 /* strong socket reference */
  526 #define INP_SW_FLOWID           0x10000000 /* software generated flow id */
  527 #define INP_HW_FLOWID           0x20000000 /* hardware generated flow id */
  528 #define IN6P_RFC2292            0x40000000 /* used RFC2292 API on the socket */
  529 #define IN6P_MTU                0x80000000 /* receive path MTU */
  530 
  531 #define INP_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
  532                                  INP_RECVIF|INP_RECVTTL|INP_RECVTOS|\
  533                                  IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
  534                                  IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
  535                                  IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
  536                                  IN6P_MTU)
  537 
  538 /*
  539  * Flags for inp_flags2.
  540  */
  541 #define INP_LLE_VALID           0x00000001 /* cached lle is valid */    
  542 #define INP_RT_VALID            0x00000002 /* cached rtentry is valid */
  543 #define INP_PCBGROUPWILD        0x00000004 /* in pcbgroup wildcard list */
  544 #define INP_REUSEPORT           0x00000008 /* SO_REUSEPORT option is set */
  545 
  546 /*
  547  * Flags passed to in_pcblookup*() functions.
  548  */
  549 #define INPLOOKUP_WILDCARD      0x00000001      /* Allow wildcard sockets. */
  550 #define INPLOOKUP_RLOCKPCB      0x00000002      /* Return inpcb read-locked. */
  551 #define INPLOOKUP_WLOCKPCB      0x00000004      /* Return inpcb write-locked. */
  552 
  553 #define INPLOOKUP_MASK  (INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB | \
  554                             INPLOOKUP_WLOCKPCB)
  555 
  556 #define sotoinpcb(so)   ((struct inpcb *)(so)->so_pcb)
  557 #define sotoin6pcb(so)  sotoinpcb(so) /* for KAME src sync over BSD*'s */
  558 
  559 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
  560 
  561 #define INP_CHECK_SOCKAF(so, af)        (INP_SOCKAF(so) == af)
  562 
  563 /*
  564  * Constants for pcbinfo.ipi_hashfields.
  565  */
  566 #define IPI_HASHFIELDS_NONE     0
  567 #define IPI_HASHFIELDS_2TUPLE   1
  568 #define IPI_HASHFIELDS_4TUPLE   2
  569 
  570 #ifdef _KERNEL
  571 VNET_DECLARE(int, ipport_reservedhigh);
  572 VNET_DECLARE(int, ipport_reservedlow);
  573 VNET_DECLARE(int, ipport_lowfirstauto);
  574 VNET_DECLARE(int, ipport_lowlastauto);
  575 VNET_DECLARE(int, ipport_firstauto);
  576 VNET_DECLARE(int, ipport_lastauto);
  577 VNET_DECLARE(int, ipport_hifirstauto);
  578 VNET_DECLARE(int, ipport_hilastauto);
  579 VNET_DECLARE(int, ipport_randomized);
  580 VNET_DECLARE(int, ipport_randomcps);
  581 VNET_DECLARE(int, ipport_randomtime);
  582 VNET_DECLARE(int, ipport_stoprandom);
  583 VNET_DECLARE(int, ipport_tcpallocs);
  584 
  585 #define V_ipport_reservedhigh   VNET(ipport_reservedhigh)
  586 #define V_ipport_reservedlow    VNET(ipport_reservedlow)
  587 #define V_ipport_lowfirstauto   VNET(ipport_lowfirstauto)
  588 #define V_ipport_lowlastauto    VNET(ipport_lowlastauto)
  589 #define V_ipport_firstauto      VNET(ipport_firstauto)
  590 #define V_ipport_lastauto       VNET(ipport_lastauto)
  591 #define V_ipport_hifirstauto    VNET(ipport_hifirstauto)
  592 #define V_ipport_hilastauto     VNET(ipport_hilastauto)
  593 #define V_ipport_randomized     VNET(ipport_randomized)
  594 #define V_ipport_randomcps      VNET(ipport_randomcps)
  595 #define V_ipport_randomtime     VNET(ipport_randomtime)
  596 #define V_ipport_stoprandom     VNET(ipport_stoprandom)
  597 #define V_ipport_tcpallocs      VNET(ipport_tcpallocs)
  598 
  599 void    in_pcbinfo_destroy(struct inpcbinfo *);
  600 void    in_pcbinfo_init(struct inpcbinfo *, const char *, struct inpcbhead *,
  601             int, int, char *, uma_init, uma_fini, uint32_t, u_int);
  602 
  603 struct inpcbgroup *
  604         in_pcbgroup_byhash(struct inpcbinfo *, u_int, uint32_t);
  605 struct inpcbgroup *
  606         in_pcbgroup_byinpcb(struct inpcb *);
  607 struct inpcbgroup *
  608         in_pcbgroup_bytuple(struct inpcbinfo *, struct in_addr, u_short,
  609             struct in_addr, u_short);
  610 void    in_pcbgroup_destroy(struct inpcbinfo *);
  611 int     in_pcbgroup_enabled(struct inpcbinfo *);
  612 void    in_pcbgroup_init(struct inpcbinfo *, u_int, int);
  613 void    in_pcbgroup_remove(struct inpcb *);
  614 void    in_pcbgroup_update(struct inpcb *);
  615 void    in_pcbgroup_update_mbuf(struct inpcb *, struct mbuf *);
  616 
  617 void    in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *);
  618 int     in_pcballoc(struct socket *, struct inpcbinfo *);
  619 int     in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *);
  620 int     in_pcb_lport(struct inpcb *, struct in_addr *, u_short *,
  621             struct ucred *, int);
  622 int     in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
  623             u_short *, struct ucred *);
  624 int     in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *);
  625 int     in_pcbconnect_mbuf(struct inpcb *, struct sockaddr *, struct ucred *,
  626             struct mbuf *);
  627 int     in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
  628             u_short *, in_addr_t *, u_short *, struct inpcb **,
  629             struct ucred *);
  630 void    in_pcbdetach(struct inpcb *);
  631 void    in_pcbdisconnect(struct inpcb *);
  632 void    in_pcbdrop(struct inpcb *);
  633 void    in_pcbfree(struct inpcb *);
  634 int     in_pcbinshash(struct inpcb *);
  635 int     in_pcbinshash_nopcbgroup(struct inpcb *);
  636 struct inpcb *
  637         in_pcblookup_local(struct inpcbinfo *,
  638             struct in_addr, u_short, int, struct ucred *);
  639 struct inpcb *
  640         in_pcblookup(struct inpcbinfo *, struct in_addr, u_int,
  641             struct in_addr, u_int, int, struct ifnet *);
  642 struct inpcb *
  643         in_pcblookup_mbuf(struct inpcbinfo *, struct in_addr, u_int,
  644             struct in_addr, u_int, int, struct ifnet *, struct mbuf *);
  645 void    in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr,
  646             int, struct inpcb *(*)(struct inpcb *, int));
  647 void    in_pcbref(struct inpcb *);
  648 void    in_pcbrehash(struct inpcb *);
  649 void    in_pcbrehash_mbuf(struct inpcb *, struct mbuf *);
  650 int     in_pcbrele(struct inpcb *);
  651 int     in_pcbrele_rlocked(struct inpcb *);
  652 int     in_pcbrele_wlocked(struct inpcb *);
  653 void    in_pcbsetsolabel(struct socket *so);
  654 int     in_getpeeraddr(struct socket *so, struct sockaddr **nam);
  655 int     in_getsockaddr(struct socket *so, struct sockaddr **nam);
  656 struct sockaddr *
  657         in_sockaddr(in_port_t port, struct in_addr *addr);
  658 void    in_pcbsosetlabel(struct socket *so);
  659 #endif /* _KERNEL */
  660 
  661 #endif /* !_NETINET_IN_PCB_H_ */

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