bsd/sys/protosw.h

   1 /*
   2  * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
  29 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  30 /*
  31  * Copyright (c) 1982, 1986, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)protosw.h   8.1 (Berkeley) 6/2/93
  63  * $FreeBSD: src/sys/sys/protosw.h,v 1.28.2.2 2001/07/03 11:02:01 ume Exp $
  64  */
  65
  66 #ifndef _SYS_PROTOSW_H_
  67 #define _SYS_PROTOSW_H_
  68
  69 #include <sys/appleapiopts.h>
  70 #include <sys/cdefs.h>
  71
  72 /* XXX: this will go away */
  73 #define PR_SLOWHZ       2               /* 2 slow timeouts per second */
  74
  75 #ifdef KERNEL_PRIVATE
  76 #include <sys/socket.h>
  77 #include <sys/socketvar.h>
  78 #include <sys/queue.h>
  79 #include <kern/locks.h>
  80
  81 /* Forward declare these structures referenced from prototypes below. */
  82 struct mbuf;
  83 struct proc;
  84 struct sockaddr;
  85 struct socket;
  86 struct sockopt;
  87 struct socket_filter;
  88 struct uio;
  89 #ifdef XNU_KERNEL_PRIVATE
  90 struct domain_old;
  91 #endif /* XNU_KERNEL_PRIVATE */
  92
  93 #pragma pack(4)
  94
  95 #ifdef XNU_KERNEL_PRIVATE
  96 /*
  97  * Legacy protocol switch table.
  98  *
  99  * NOTE: Do not modify this structure, as there are modules outside of xnu
 100  * which rely on the size and layout for binary compatibility.  This structure
 101  * is simply used by the exported net_{add,del}_proto_old, pffindproto_old
 102  * routines, and by the domain_old structure.  Internally, protocol switch
 103  * tables are stored in the private variant of protosw defined down below.
 104  */
 105 struct protosw_old {
 106 #else
 107 struct protosw {
 108 #endif /* !XNU_KERNEL_PRIVATE */
 109         short   pr_type;                /* socket type used for */
 110         struct  domain *pr_domain;      /* domain protocol a member of */
 111         short   pr_protocol;            /* protocol number */
 112         unsigned int pr_flags;          /* see below */
 113         /*
 114          * protocol-protocol hooks
 115          */
 116         void    (*pr_input)             /* input to protocol (from below) */
 117                     (struct mbuf *, int len);
 118         int     (*pr_output)            /* output to protocol (from above) */
 119                     (struct mbuf *m, struct socket *so);
 120         void    (*pr_ctlinput)          /* control input (from below) */
 121                     (int, struct sockaddr *, void *);
 122         int     (*pr_ctloutput)         /* control output (from above) */
 123                     (struct socket *, struct sockopt *);
 124         /*
 125          * user-protocol hook
 126          */
 127         void    *pr_ousrreq;
 128         /*
 129          * utility hooks
 130          */
 131         void    (*pr_init)(void);       /* initialization hook */
 132         void    (*pr_unused)(void);     /* placeholder - fasttimo is removed */
 133         void    (*pr_unused2)(void);    /* placeholder - slowtimo is removed */
 134         void    (*pr_drain)(void);      /* flush any excess space possible */
 135         int     (*pr_sysctl)            /* sysctl for protocol */
 136                     (int *, u_int, void *, size_t *, void *, size_t);
 137 #ifdef XNU_KERNEL_PRIVATE
 138         struct  pr_usrreqs_old *pr_usrreqs; /* supersedes pr_usrreq() */
 139 #else
 140         struct  pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
 141 #endif /* !XNU_KERNEL_PRIVATE */
 142         int     (*pr_lock)              /* lock function for protocol */
 143                     (struct socket *so, int locktype, void *debug);
 144         int     (*pr_unlock)            /* unlock for protocol */
 145                     (struct socket *so, int locktype, void *debug);
 146         lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
 147                     (struct socket *so, int locktype);
 148         /*
 149          * Implant hooks
 150          */
 151         TAILQ_HEAD(, socket_filter) pr_filter_head;
 152 #ifdef XNU_KERNEL_PRIVATE
 153         struct protosw_old *pr_next;    /* chain for domain */
 154 #else
 155         struct protosw *pr_next;        /* chain for domain */
 156 #endif /* !XNU_KERNEL_PRIVATE */
 157         u_int32_t       reserved[1];    /* padding for future use */
 158 };
 159
 160 #pragma pack()
 161
 162 #ifdef XNU_KERNEL_PRIVATE
 163 /*
 164  * Protocol switch table.
 165  *
 166  * Each protocol has a handle initializing one of these structures,
 167  * which is used for protocol-protocol and system-protocol communication.
 168  *
 169  * A protocol is called through the pr_init entry before any other.
 170  * The system will call the pr_drain entry if it is low on space and this
 171  * should throw away any non-critical data.
 172  *
 173  * Protocols pass data between themselves as chains of mbufs using
 174  * the pr_input and pr_output hooks.  Pr_input passes data up (towards
 175  * the users) and pr_output passes it down (towards the interfaces); control
 176  * information passes up and down on pr_ctlinput and pr_ctloutput.
 177  * The protocol is responsible for the space occupied by any the
 178  * arguments to these entries and must dispose it.
 179  *
 180  * The userreq routine interfaces protocols to the system and is
 181  * described below.
 182  *
 183  * After a protocol is attached, its pr_domain will be set to the domain
 184  * which the protocol belongs to, and its pr_protosw will be set to the
 185  * address of the protosw instance.  The latter is useful for finding
 186  * the real/original protosw instance, in the event so_proto is altered
 187  * to point to an alternative/derivative protosw.  E.g. the list of
 188  * socket filters is only applicable on the original protosw instance.
 189  *
 190  * Internal, private and extendable representation of protosw.
 191  */
 192 struct protosw {
 193         TAILQ_ENTRY(protosw) pr_entry; /* chain for domain */
 194         struct  domain *pr_domain;      /* domain protocol a member of */
 195         struct protosw *pr_protosw;     /* pointer to self */
 196         u_int16_t pr_type;              /* socket type used for */
 197         u_int16_t pr_protocol;          /* protocol number */
 198         u_int32_t pr_flags;             /* see below */
 199         /*
 200          * protocol-protocol hooks
 201          */
 202         void    (*pr_input)             /* input to protocol (from below) */
 203                     (struct mbuf *, int len);
 204         int     (*pr_output)            /* output to protocol (from above) */
 205                     (struct mbuf *m, struct socket *so);
 206         void    (*pr_ctlinput)          /* control input (from below) */
 207                     (int, struct sockaddr *, void *);
 208         int     (*pr_ctloutput)         /* control output (from above) */
 209                     (struct socket *, struct sockopt *);
 210         /*
 211          * user-protocol hook
 212          */
 213         struct  pr_usrreqs *pr_usrreqs; /* user request; see list below */
 214         /*
 215          * utility hooks
 216          */
 217         void    (*pr_init)              /* initialization hook */
 218                     (struct protosw *, struct domain *);
 219         void    (*pr_drain)(void);      /* flush any excess space possible */
 220         int     (*pr_sysctl)            /* sysctl for protocol */
 221                     (int *, u_int, void *, size_t *, void *, size_t);
 222         int     (*pr_lock)              /* lock function for protocol */
 223                     (struct socket *so, int locktype, void *debug);
 224         int     (*pr_unlock)            /* unlock for protocol */
 225                     (struct socket *so, int locktype, void *debug);
 226         lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
 227                     (struct socket *so, int locktype);
 228         /*
 229          * misc
 230          */
 231         TAILQ_HEAD(, socket_filter) pr_filter_head;
 232         struct protosw_old *pr_old;
 233 };
 234 #endif /* XNU_KERNEL_PRIVATE */
 235
 236 /*
 237  * Values for pr_flags.
 238  * PR_ADDR requires PR_ATOMIC;
 239  * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
 240  * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
 241  *      and the protocol understands the MSG_EOF flag.  The first property is
 242  *      is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
 243  *      anyhow).
 244  */
 245 #define PR_ATOMIC       0x01    /* exchange atomic messages only */
 246 #define PR_ADDR         0x02    /* addresses given with messages */
 247 #define PR_CONNREQUIRED 0x04    /* connection required by protocol */
 248 #define PR_WANTRCVD     0x08    /* want PRU_RCVD calls */
 249 #define PR_RIGHTS       0x10    /* passes capabilities */
 250 #define PR_IMPLOPCL     0x20    /* implied open/close */
 251 #define PR_LASTHDR      0x40    /* enforce ipsec policy; last header */
 252 #define PR_PROTOLOCK    0x80    /* protocol takes care of it's own locking */
 253 #define PR_PCBLOCK      0x100   /* protocol supports per pcb locking */
 254 #define PR_DISPOSE      0x200   /* protocol requires late lists disposal */
 255 #ifdef BSD_KERNEL_PRIVATE
 256 #define PR_INITIALIZED  0x400   /* protocol has been initialized */
 257 #define PR_ATTACHED     0x800   /* protocol is attached to a domain */
 258 #define PR_MULTICONN    0x1000  /* supports multiple connect calls */
 259 #define PR_EVCONNINFO   0x2000  /* protocol generates conninfo event */
 260 #define PR_PRECONN_WRITE        0x4000  /* protocol supports preconnect write */
 261 #define PR_DATA_IDEMPOTENT      0x8000  /* protocol supports idempotent data at connectx-time */
 262 #define PR_OLD          0x10000000 /* added via net_add_proto */
 263
 264 /* pseudo-public domain flags */
 265 #define PRF_USERFLAGS                                                   \
 266         (PR_ATOMIC|PR_ADDR|PR_CONNREQUIRED|PR_WANTRCVD|PR_RIGHTS|       \
 267         PR_IMPLOPCL|PR_LASTHDR|PR_PROTOLOCK|PR_PCBLOCK|PR_DISPOSE)
 268 #endif /* BSD_KERNEL_PRIVATE */
 269
 270 #ifdef BSD_KERNEL_PRIVATE
 271 /*
 272  * The arguments to the ctlinput routine are
 273  *      (*protosw[].pr_ctlinput)(cmd, sa, arg);
 274  * where cmd is one of the commands below, sa is a pointer to a sockaddr,
 275  * and arg is a `void *' argument used within a protocol family.
 276  */
 277 #define PRC_IFDOWN              0       /* interface transition */
 278 #define PRC_ROUTEDEAD           1       /* select new route if possible ??? */
 279 #define PRC_IFUP                2       /* interface has come back up */
 280 #define PRC_QUENCH2             3       /* DEC congestion bit says slow down */
 281 #define PRC_QUENCH              4       /* some one said to slow down */
 282 #define PRC_MSGSIZE             5       /* message size forced drop */
 283 #define PRC_HOSTDEAD            6       /* host appears to be down */
 284 #define PRC_HOSTUNREACH         7       /* deprecated (use PRC_UNREACH_HOST) */
 285 #define PRC_UNREACH_NET         8       /* no route to network */
 286 #define PRC_UNREACH_HOST        9       /* no route to host */
 287 #define PRC_UNREACH_PROTOCOL    10      /* dst says bad protocol */
 288 #define PRC_UNREACH_PORT        11      /* bad port # */
 289 /* was  PRC_UNREACH_NEEDFRAG    12         (use PRC_MSGSIZE) */
 290 #define PRC_UNREACH_SRCFAIL     13      /* source route failed */
 291 #define PRC_REDIRECT_NET        14      /* net routing redirect */
 292 #define PRC_REDIRECT_HOST       15      /* host routing redirect */
 293 #define PRC_REDIRECT_TOSNET     16      /* redirect for type of service & net */
 294 #define PRC_REDIRECT_TOSHOST    17      /* redirect for tos & host */
 295 #define PRC_TIMXCEED_INTRANS    18      /* packet lifetime expired in transit */
 296 #define PRC_TIMXCEED_REASS      19      /* lifetime expired on reass q */
 297 #define PRC_PARAMPROB           20      /* header incorrect */
 298 #define PRC_UNREACH_ADMIN_PROHIB 21     /* packet administrativly prohibited */
 299
 300 #define PRC_NCMDS               22
 301
 302 #define PRC_IS_REDIRECT(cmd)    \
 303         ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
 304
 305 #ifdef PRCREQUESTS
 306 char    *prcrequests[] = {
 307         "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
 308         "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
 309         "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
 310         "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
 311         "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
 312         "PARAMPROB", "ADMIN-UNREACH"
 313 };
 314 #endif /* PRCREQUESTS */
 315
 316 /*
 317  * The arguments to ctloutput are:
 318  *      (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
 319  * req is one of the actions listed below, so is a (struct socket *),
 320  * level is an indication of which protocol layer the option is intended.
 321  * optname is a protocol dependent socket option request,
 322  * optval is a pointer to a mbuf-chain pointer, for value-return results.
 323  * The protocol is responsible for disposal of the mbuf chain *optval
 324  * if supplied,
 325  * the caller is responsible for any space held by *optval, when returned.
 326  * A non-zero return from usrreq gives an
 327  * UNIX error number which should be passed to higher level software.
 328  */
 329 #define PRCO_GETOPT     0
 330 #define PRCO_SETOPT     1
 331
 332 #define PRCO_NCMDS      2
 333
 334 #ifdef PRCOREQUESTS
 335 char    *prcorequests[] = {
 336         "GETOPT", "SETOPT",
 337 };
 338 #endif /* PRCOREQUESTS */
 339
 340 /*
 341  * In earlier BSD network stacks, a single pr_usrreq() function pointer was
 342  * invoked with an operation number indicating what operation was desired.
 343  * We now provide individual function pointers which protocols can implement,
 344  * which offers a number of benefits (such as type checking for arguments).
 345  * These older constants are still present in order to support TCP debugging.
 346  */
 347 #define PRU_ATTACH              0       /* attach protocol to up */
 348 #define PRU_DETACH              1       /* detach protocol from up */
 349 #define PRU_BIND                2       /* bind socket to address */
 350 #define PRU_LISTEN              3       /* listen for connection */
 351 #define PRU_CONNECT             4       /* establish connection to peer */
 352 #define PRU_ACCEPT              5       /* accept connection from peer */
 353 #define PRU_DISCONNECT          6       /* disconnect from peer */
 354 #define PRU_SHUTDOWN            7       /* won't send any more data */
 355 #define PRU_RCVD                8       /* have taken data; more room now */
 356 #define PRU_SEND                9       /* send this data */
 357 #define PRU_ABORT               10      /* abort (fast DISCONNECT, DETATCH) */
 358 #define PRU_CONTROL             11      /* control operations on protocol */
 359 #define PRU_SENSE               12      /* return status into m */
 360 #define PRU_RCVOOB              13      /* retrieve out of band data */
 361 #define PRU_SENDOOB             14      /* send out of band data */
 362 #define PRU_SOCKADDR            15      /* fetch socket's address */
 363 #define PRU_PEERADDR            16      /* fetch peer's address */
 364 #define PRU_CONNECT2            17      /* connect two sockets */
 365 /* begin for protocols internal use */
 366 #define PRU_FASTTIMO            18      /* 200ms timeout */
 367 #define PRU_SLOWTIMO            19      /* 500ms timeout */
 368 #define PRU_PROTORCV            20      /* receive from below */
 369 #define PRU_PROTOSEND           21      /* send to below */
 370 /* end for protocol's internal use */
 371 #define PRU_SEND_EOF            22      /* send and close */
 372 #define PRU_NREQ                22
 373
 374 #ifdef PRUREQUESTS
 375 char *prurequests[] = {
 376         "ATTACH",       "DETACH",       "BIND",         "LISTEN",
 377         "CONNECT",      "ACCEPT",       "DISCONNECT",   "SHUTDOWN",
 378         "RCVD",         "SEND",         "ABORT",        "CONTROL",
 379         "SENSE",        "RCVOOB",       "SENDOOB",      "SOCKADDR",
 380         "PEERADDR",     "CONNECT2",     "FASTTIMO",     "SLOWTIMO",
 381         "PROTORCV",     "PROTOSEND",    "SEND_EOF",
 382 };
 383 #endif /* PRUREQUESTS */
 384 #endif /* BSD_KERNEL_PRIVATE */
 385
 386 struct ifnet;
 387 struct stat;
 388 struct ucred;
 389 struct uio;
 390 struct recv_msg_elem;
 391
 392 #ifdef XNU_KERNEL_PRIVATE
 393 /*
 394  * Legacy user-protocol hooks.
 395  *
 396  * NOTE: Do not modify this structure, as there are modules outside of xnu
 397  * which rely on the size and layout for binary compatibility.  This structure
 398  * is simply used by the protosw_old structure.  Internally, user-protocol
 399  * hooks use the private variant of pr_usrreqs defined down below.
 400  */
 401 struct pr_usrreqs_old {
 402 #else
 403 struct pr_usrreqs {
 404 #endif /* !XNU_KERNEL_PRIVATE */
 405         int     (*pru_abort)(struct socket *so);
 406         int     (*pru_accept)(struct socket *so, struct sockaddr **nam);
 407         int     (*pru_attach)(struct socket *so, int proto, struct proc *p);
 408         int     (*pru_bind)(struct socket *so, struct sockaddr *nam,
 409                     struct proc *p);
 410         int     (*pru_connect)(struct socket *so, struct sockaddr *nam,
 411                     struct proc *p);
 412         int     (*pru_connect2)(struct socket *so1, struct socket *so2);
 413         int     (*pru_control)(struct socket *so, u_long cmd, caddr_t data,
 414                     struct ifnet *ifp, struct proc *p);
 415         int     (*pru_detach)(struct socket *so);
 416         int     (*pru_disconnect)(struct socket *so);
 417         int     (*pru_listen)(struct socket *so, struct proc *p);
 418         int     (*pru_peeraddr)(struct socket *so, struct sockaddr **nam);
 419         int     (*pru_rcvd)(struct socket *so, int flags);
 420         int     (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags);
 421         int     (*pru_send)(struct socket *so, int flags, struct mbuf *m,
 422                     struct sockaddr *addr, struct mbuf *control,
 423                     struct proc *p);
 424         int     (*pru_sense)(struct socket *so, void  *sb, int isstat64);
 425         int     (*pru_shutdown)(struct socket *so);
 426         int     (*pru_sockaddr)(struct socket *so, struct sockaddr **nam);
 427         int     (*pru_sosend)(struct socket *so, struct sockaddr *addr,
 428                     struct uio *uio, struct mbuf *top, struct mbuf *control,
 429                     int flags);
 430         int     (*pru_soreceive)(struct socket *so, struct sockaddr **paddr,
 431                     struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
 432                     int *flagsp);
 433         int     (*pru_sopoll)(struct socket *so, int events,
 434                     struct ucred *cred, void *);
 435 };
 436
 437 #ifdef XNU_KERNEL_PRIVATE
 438 /*
 439  * If the ordering here looks odd, that's because it's alphabetical.  These
 440  * should eventually be merged back into struct protosw.
 441  *
 442  * Internal, private and extendable representation of pr_usrreqs.
 443  *
 444  * NOTE: When adding new ones, also add default callbacks in pru_sanitize().
 445  */
 446 struct pr_usrreqs {
 447         uint32_t pru_flags;     /* see PRUF flags below */
 448         int     (*pru_abort)(struct socket *);
 449         int     (*pru_accept)(struct socket *, struct sockaddr **);
 450         int     (*pru_attach)(struct socket *, int proto, struct proc *);
 451         int     (*pru_bind)(struct socket *, struct sockaddr *, struct proc *);
 452         int     (*pru_connect)(struct socket *, struct sockaddr *,
 453                     struct proc *);
 454         int     (*pru_connect2)(struct socket *, struct socket *);
 455         int     (*pru_connectx)(struct socket *, struct sockaddr *,
 456                     struct sockaddr *, struct proc *, uint32_t,
 457                     sae_associd_t, sae_connid_t *, uint32_t, void *, uint32_t,
 458                     struct uio *, user_ssize_t *);
 459         int     (*pru_control)(struct socket *, u_long, caddr_t,
 460                     struct ifnet *, struct proc *);
 461         int     (*pru_detach)(struct socket *);
 462         int     (*pru_disconnect)(struct socket *);
 463         int     (*pru_disconnectx)(struct socket *,
 464                     sae_associd_t, sae_connid_t);
 465         int     (*pru_listen)(struct socket *, struct proc *);
 466         int     (*pru_peeloff)(struct socket *,
 467                     sae_associd_t, struct socket **);
 468         int     (*pru_peeraddr)(struct socket *, struct sockaddr **);
 469         int     (*pru_rcvd)(struct socket *, int);
 470         int     (*pru_rcvoob)(struct socket *, struct mbuf *, int);
 471         int     (*pru_send)(struct socket *, int, struct mbuf *,
 472                     struct sockaddr *, struct mbuf *, struct proc *);
 473         int     (*pru_send_list)(struct socket *, int, struct mbuf *,
 474                     struct sockaddr *, struct mbuf *, struct proc *);
 475 #define PRUS_OOB        0x1
 476 #define PRUS_EOF        0x2
 477 #define PRUS_MORETOCOME 0x4
 478         int     (*pru_sense)(struct socket *, void *, int);
 479         int     (*pru_shutdown)(struct socket *);
 480         int     (*pru_sockaddr)(struct socket *, struct sockaddr **);
 481         int     (*pru_sopoll)(struct socket *, int, struct ucred *, void *);
 482         int     (*pru_soreceive)(struct socket *, struct sockaddr **,
 483                     struct uio *, struct mbuf **, struct mbuf **, int *);
 484         int     (*pru_soreceive_list)(struct socket *, struct recv_msg_elem *, u_int,
 485                     int *);
 486         int     (*pru_sosend)(struct socket *, struct sockaddr *,
 487                     struct uio *, struct mbuf *, struct mbuf *, int);
 488         int     (*pru_sosend_list)(struct socket *, struct uio **, u_int, int);
 489         int     (*pru_socheckopt)(struct socket *, struct sockopt *);
 490         int     (*pru_preconnect)(struct socket *so);
 491 };
 492
 493 /* Values for pru_flags  */
 494 #define PRUF_OLD        0x10000000      /* added via net_add_proto */
 495
 496 #endif /* XNU_KERNEL_PRIVATE */
 497
 498 __BEGIN_DECLS
 499 extern int pru_abort_notsupp(struct socket *so);
 500 extern int pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
 501 extern int pru_attach_notsupp(struct socket *so, int proto, struct proc *p);
 502 extern int pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
 503     struct proc *p);
 504 extern int pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
 505     struct proc *p);
 506 extern int pru_connect2_notsupp(struct socket *so1, struct socket *so2);
 507 #ifdef XNU_KERNEL_PRIVATE
 508 extern int pru_connectx_notsupp(struct socket *, struct sockaddr *,
 509     struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
 510     sae_connid_t *, uint32_t, void *, uint32_t, struct uio *, user_ssize_t *);
 511 extern int pru_disconnectx_notsupp(struct socket *, sae_associd_t,
 512     sae_connid_t);
 513 extern int pru_socheckopt_null(struct socket *, struct sockopt *);
 514 extern int pru_peeloff_notsupp(struct socket *, sae_associd_t, struct socket **);
 515 #endif /* XNU_KERNEL_PRIVATE */
 516 extern int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
 517     struct ifnet *ifp, struct proc *p);
 518 extern int pru_detach_notsupp(struct socket *so);
 519 extern int pru_disconnect_notsupp(struct socket *so);
 520 extern int pru_listen_notsupp(struct socket *so, struct proc *p);
 521 extern int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam);
 522 extern int pru_rcvd_notsupp(struct socket *so, int flags);
 523 extern int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags);
 524 extern int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
 525     struct sockaddr *addr, struct mbuf *control, struct proc *p);
 526 extern int pru_send_list_notsupp(struct socket *so, int flags, struct mbuf *m,
 527     struct sockaddr *addr, struct mbuf *control, struct proc *p);
 528 extern int pru_sense_null(struct socket *so, void * sb, int isstat64);
 529 extern int pru_shutdown_notsupp(struct socket *so);
 530 extern int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam);
 531 extern int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
 532     struct uio *uio,  struct mbuf *top, struct mbuf *control, int flags);
 533 extern int pru_sosend_list_notsupp(struct socket *so, struct uio **uio,
 534     u_int, int flags);
 535 extern int pru_soreceive_notsupp(struct socket *so,
 536     struct sockaddr **paddr, struct uio *uio, struct mbuf **mp0,
 537     struct mbuf **controlp, int *flagsp);
 538 extern int pru_soreceive_list_notsupp(struct socket *, struct recv_msg_elem *, u_int,
 539     int *);
 540 extern int pru_sopoll_notsupp(struct socket *so, int events,
 541     struct ucred *cred, void *);
 542 #ifdef XNU_KERNEL_PRIVATE
 543 extern void pru_sanitize(struct pr_usrreqs *);
 544 extern void domaininit(void);
 545 extern void domainfin(void);
 546 extern void pfctlinput(int, struct sockaddr *);
 547 extern void pfctlinput2(int, struct sockaddr *, void *);
 548 extern struct protosw *pffindproto_locked(int, int, int);
 549 extern struct protosw *pffindprotonotype(int, int);
 550 extern struct protosw *pffindtype(int, int);
 551 extern struct protosw_old *pffindproto_old(int, int, int);
 552 extern int net_add_proto(struct protosw *, struct domain *, int);
 553 extern void net_init_proto(struct protosw *, struct domain *);
 554 extern int net_del_proto(int, int, struct domain *);
 555 extern int net_add_proto_old(struct protosw_old *, struct domain_old *);
 556 extern int net_del_proto_old(int, int, struct domain_old *);
 557 extern void net_update_uptime(void);
 558 extern void net_update_uptime_secs(uint64_t secs);
 559 extern u_int64_t net_uptime(void);
 560 extern void net_uptime2timeval(struct timeval *);
 561 #else
 562 extern int net_add_proto(struct protosw *, struct domain *);
 563 extern int net_del_proto(int, int, struct domain *);
 564 #endif /* XNU_KERNEL_PRIVATE */
 565 extern struct protosw *pffindproto(int family, int protocol, int type);
 566 __END_DECLS
 567 #endif /* KERNEL_PRIVATE */
 568 #endif  /* !_SYS_PROTOSW_H_ */