bsd/sys/protosw.h

   1 /*
   2  * Copyright (c) 2000-2019 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 /*
  76  * The arguments to the ctlinput routine are
  77  *      (*protosw[].pr_ctlinput)(cmd, sa, arg);
  78  * where cmd is one of the commands below, sa is a pointer to a sockaddr,
  79  * and arg is a `void *' argument used within a protocol family.
  80  */
  81 #define PRC_IFDOWN              0       /* interface transition */
  82 #define PRC_ROUTEDEAD           1       /* select new route if possible ??? */
  83 #define PRC_IFUP                2       /* interface has come back up */
  84 #define PRC_QUENCH2             3       /* DEC congestion bit says slow down */
  85 #define PRC_QUENCH              4       /* some one said to slow down */
  86 #define PRC_MSGSIZE             5       /* message size forced drop */
  87 #define PRC_HOSTDEAD            6       /* host appears to be down */
  88 #define PRC_HOSTUNREACH         7       /* deprecated (use PRC_UNREACH_HOST) */
  89 #define PRC_UNREACH_NET         8       /* no route to network */
  90 #define PRC_UNREACH_HOST        9       /* no route to host */
  91 #define PRC_UNREACH_PROTOCOL    10      /* dst says bad protocol */
  92 #define PRC_UNREACH_PORT        11      /* bad port # */
  93 /* was PRC_UNREACH_NEEDFRAG     12         (use PRC_MSGSIZE) */
  94 #define PRC_UNREACH_SRCFAIL     13      /* source route failed */
  95 #define PRC_REDIRECT_NET        14      /* net routing redirect */
  96 #define PRC_REDIRECT_HOST       15      /* host routing redirect */
  97 #define PRC_REDIRECT_TOSNET     16      /* redirect for type of service & net */
  98 #define PRC_REDIRECT_TOSHOST    17      /* redirect for tos & host */
  99 #define PRC_TIMXCEED_INTRANS    18      /* packet lifetime expired in transit */
 100 #define PRC_TIMXCEED_REASS      19      /* lifetime expired on reass q */
 101 #define PRC_PARAMPROB           20      /* header incorrect */
 102 #define PRC_UNREACH_ADMIN_PROHIB        21     /* packet administrativly prohibited */
 103
 104 #define PRC_NCMDS               22
 105
 106 #define PRC_IS_REDIRECT(cmd)    \
 107         ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
 108
 109 #ifdef BSD_KERNEL_PRIVATE
 110 #include <sys/eventhandler.h>
 111 #endif
 112
 113 #ifdef KERNEL_PRIVATE
 114 #include <sys/socket.h>
 115 #include <sys/socketvar.h>
 116 #include <sys/queue.h>
 117 #include <kern/locks.h>
 118
 119 /* Forward declare these structures referenced from prototypes below. */
 120 struct mbuf;
 121 struct proc;
 122 struct sockaddr;
 123 struct socket;
 124 struct sockopt;
 125 struct socket_filter;
 126 struct uio;
 127 struct ifnet;
 128 #ifdef XNU_KERNEL_PRIVATE
 129 struct domain_old;
 130 struct proc;
 131 #endif /* XNU_KERNEL_PRIVATE */
 132
 133 #pragma pack(4)
 134
 135 #ifdef XNU_KERNEL_PRIVATE
 136 /*
 137  * Legacy protocol switch table.
 138  *
 139  * NOTE: Do not modify this structure, as there are modules outside of xnu
 140  * which rely on the size and layout for binary compatibility.  This structure
 141  * is simply used by the exported net_{add,del}_proto_old, pffindproto_old
 142  * routines, and by the domain_old structure.  Internally, protocol switch
 143  * tables are stored in the private variant of protosw defined down below.
 144  */
 145 struct protosw_old {
 146 #else
 147 struct protosw {
 148 #endif /* !XNU_KERNEL_PRIVATE */
 149         short   pr_type;                /* socket type used for */
 150         struct  domain *pr_domain;      /* domain protocol a member of */
 151         short   pr_protocol;            /* protocol number */
 152         unsigned int pr_flags;          /* see below */
 153         /*
 154          * protocol-protocol hooks
 155          */
 156         void    (*pr_input)             /* input to protocol (from below) */
 157         (struct mbuf *, int len);
 158         int     (*pr_output)            /* output to protocol (from above) */
 159         (struct mbuf *m, struct socket *so);
 160         void    (*pr_ctlinput)          /* control input (from below) */
 161         (int, struct sockaddr *, void *, struct ifnet *);
 162         int     (*pr_ctloutput)         /* control output (from above) */
 163         (struct socket *, struct sockopt *);
 164         /*
 165          * user-protocol hook
 166          */
 167         void    *pr_ousrreq;
 168         /*
 169          * utility hooks
 170          */
 171         void    (*pr_init)(void);       /* initialization hook */
 172         void    (*pr_unused)(void);     /* placeholder - fasttimo is removed */
 173         void    (*pr_unused2)(void);    /* placeholder - slowtimo is removed */
 174         void    (*pr_drain)(void);      /* flush any excess space possible */
 175         int     (*pr_sysctl)            /* sysctl for protocol */
 176         (int *, u_int, void *, size_t *, void *, size_t);
 177 #ifdef XNU_KERNEL_PRIVATE
 178         struct  pr_usrreqs_old *pr_usrreqs; /* supersedes pr_usrreq() */
 179 #else
 180         struct  pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
 181 #endif /* !XNU_KERNEL_PRIVATE */
 182         int     (*pr_lock)              /* lock function for protocol */
 183         (struct socket *so, int refcnt, void *debug);
 184         int     (*pr_unlock)            /* unlock for protocol */
 185         (struct socket *so, int refcnt, void *debug);
 186         lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
 187         (struct socket *so, int flags);
 188         /*
 189          * Implant hooks
 190          */
 191         TAILQ_HEAD(, socket_filter) pr_filter_head;
 192 #ifdef XNU_KERNEL_PRIVATE
 193         struct protosw_old *pr_next;    /* chain for domain */
 194 #else
 195         struct protosw *pr_next;        /* chain for domain */
 196 #endif /* !XNU_KERNEL_PRIVATE */
 197         u_int32_t       reserved[1];    /* padding for future use */
 198 };
 199
 200 #pragma pack()
 201
 202 #ifdef XNU_KERNEL_PRIVATE
 203 /*
 204  * Protocol switch table.
 205  *
 206  * Each protocol has a handle initializing one of these structures,
 207  * which is used for protocol-protocol and system-protocol communication.
 208  *
 209  * A protocol is called through the pr_init entry before any other.
 210  * The system will call the pr_drain entry if it is low on space and this
 211  * should throw away any non-critical data.
 212  *
 213  * Protocols pass data between themselves as chains of mbufs using
 214  * the pr_input and pr_output hooks.  Pr_input passes data up (towards
 215  * the users) and pr_output passes it down (towards the interfaces); control
 216  * information passes up and down on pr_ctlinput and pr_ctloutput.
 217  * The protocol is responsible for the space occupied by any the
 218  * arguments to these entries and must dispose it.
 219  *
 220  * The userreq routine interfaces protocols to the system and is
 221  * described below.
 222  *
 223  * After a protocol is attached, its pr_domain will be set to the domain
 224  * which the protocol belongs to, and its pr_protosw will be set to the
 225  * address of the protosw instance.  The latter is useful for finding
 226  * the real/original protosw instance, in the event so_proto is altered
 227  * to point to an alternative/derivative protosw.  E.g. the list of
 228  * socket filters is only applicable on the original protosw instance.
 229  *
 230  * Internal, private and extendable representation of protosw.
 231  */
 232 struct protosw {
 233         TAILQ_ENTRY(protosw) pr_entry; /* chain for domain */
 234         struct  domain *pr_domain;      /* domain protocol a member of */
 235         struct protosw *pr_protosw;     /* pointer to self */
 236         u_int16_t pr_type;              /* socket type used for */
 237         u_int16_t pr_protocol;          /* protocol number */
 238         u_int32_t pr_flags;             /* see below */
 239         /*
 240          * protocol-protocol hooks
 241          */
 242         void    (*pr_input)             /* input to protocol (from below) */
 243         (struct mbuf *, int len);
 244         int     (*pr_output)            /* output to protocol (from above) */
 245         (struct mbuf *m, struct socket *so);
 246         void    (*pr_ctlinput)          /* control input (from below) */
 247         (int, struct sockaddr *, void *, struct ifnet *);
 248         int     (*pr_ctloutput)         /* control output (from above) */
 249         (struct socket *, struct sockopt *);
 250         /*
 251          * user-protocol hook
 252          */
 253         struct  pr_usrreqs *pr_usrreqs; /* user request; see list below */
 254         /*
 255          * utility hooks
 256          */
 257         void    (*pr_init)              /* initialization hook */
 258         (struct protosw *, struct domain *);
 259         void    (*pr_drain)(void);      /* flush any excess space possible */
 260         int     (*pr_sysctl)            /* sysctl for protocol */
 261         (int *, u_int, void *, size_t *, void *, size_t);
 262         int     (*pr_lock)              /* lock function for protocol */
 263         (struct socket *so, int refcnt, void *debug);
 264         int     (*pr_unlock)            /* unlock for protocol */
 265         (struct socket *so, int refcnt, void *debug);
 266         lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
 267         (struct socket *so, int flags);
 268         /*
 269          * misc
 270          */
 271         TAILQ_HEAD(, socket_filter) pr_filter_head;
 272         struct protosw_old *pr_old;
 273
 274         void    (*pr_update_last_owner) /* update last socket owner */
 275         (struct socket *so, struct proc *p, struct proc *ep);
 276
 277         void    (*pr_copy_last_owner) /* copy last socket from listener */
 278         (struct socket *so, struct socket *head);
 279 };
 280
 281 /*
 282  * Values for the flags argument of pr_getlock
 283  */
 284 #define PR_F_WILLUNLOCK 0x01    /* Will unlock (e.g., msleep) after the pr_getlock call */
 285
 286 #endif /* XNU_KERNEL_PRIVATE */
 287
 288 /*
 289  * Values for pr_flags.
 290  * PR_ADDR requires PR_ATOMIC;
 291  * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
 292  * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
 293  *      and the protocol understands the MSG_EOF flag.  The first property is
 294  *      is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
 295  *      anyhow).
 296  */
 297 #define PR_ATOMIC       0x01    /* exchange atomic messages only */
 298 #define PR_ADDR         0x02    /* addresses given with messages */
 299 #define PR_CONNREQUIRED 0x04    /* connection required by protocol */
 300 #define PR_WANTRCVD     0x08    /* want PRU_RCVD calls */
 301 #define PR_RIGHTS       0x10    /* passes capabilities */
 302 #define PR_IMPLOPCL     0x20    /* implied open/close */
 303 #define PR_LASTHDR      0x40    /* enforce ipsec policy; last header */
 304 #define PR_PROTOLOCK    0x80    /* protocol takes care of it's own locking */
 305 #define PR_PCBLOCK      0x100   /* protocol supports per pcb locking */
 306 #define PR_DISPOSE      0x200   /* protocol requires late lists disposal */
 307 #ifdef BSD_KERNEL_PRIVATE
 308 #define PR_INITIALIZED  0x400   /* protocol has been initialized */
 309 #define PR_ATTACHED     0x800   /* protocol is attached to a domain */
 310 #define PR_MULTICONN    0x1000  /* supports multiple connect calls */
 311 #define PR_EVCONNINFO   0x2000  /* protocol generates conninfo event */
 312 #define PR_PRECONN_WRITE        0x4000  /* protocol supports preconnect write */
 313 #define PR_DATA_IDEMPOTENT      0x8000  /* protocol supports idempotent data at connectx-time */
 314 #define PR_OLD          0x10000000 /* added via net_add_proto */
 315
 316 /* pseudo-public domain flags */
 317 #define PRF_USERFLAGS                                                   \
 318         (PR_ATOMIC|PR_ADDR|PR_CONNREQUIRED|PR_WANTRCVD|PR_RIGHTS|       \
 319         PR_IMPLOPCL|PR_LASTHDR|PR_PROTOLOCK|PR_PCBLOCK|PR_DISPOSE)
 320 #endif /* BSD_KERNEL_PRIVATE */
 321
 322 #ifdef BSD_KERNEL_PRIVATE
 323 #ifdef PRCREQUESTS
 324 char    *prcrequests[] = {
 325         "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
 326         "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
 327         "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
 328         "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
 329         "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
 330         "PARAMPROB", "ADMIN-UNREACH"
 331 };
 332 #endif /* PRCREQUESTS */
 333
 334 /*
 335  * The arguments to ctloutput are:
 336  *      (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
 337  * req is one of the actions listed below, so is a (struct socket *),
 338  * level is an indication of which protocol layer the option is intended.
 339  * optname is a protocol dependent socket option request,
 340  * optval is a pointer to a mbuf-chain pointer, for value-return results.
 341  * The protocol is responsible for disposal of the mbuf chain *optval
 342  * if supplied,
 343  * the caller is responsible for any space held by *optval, when returned.
 344  * A non-zero return from usrreq gives an
 345  * UNIX error number which should be passed to higher level software.
 346  */
 347 #define PRCO_GETOPT     0
 348 #define PRCO_SETOPT     1
 349
 350 #define PRCO_NCMDS      2
 351
 352 #ifdef PRCOREQUESTS
 353 char    *prcorequests[] = {
 354         "GETOPT", "SETOPT",
 355 };
 356 #endif /* PRCOREQUESTS */
 357
 358 /*
 359  * In earlier BSD network stacks, a single pr_usrreq() function pointer was
 360  * invoked with an operation number indicating what operation was desired.
 361  * We now provide individual function pointers which protocols can implement,
 362  * which offers a number of benefits (such as type checking for arguments).
 363  * These older constants are still present in order to support TCP debugging.
 364  */
 365 #define PRU_ATTACH              0       /* attach protocol to up */
 366 #define PRU_DETACH              1       /* detach protocol from up */
 367 #define PRU_BIND                2       /* bind socket to address */
 368 #define PRU_LISTEN              3       /* listen for connection */
 369 #define PRU_CONNECT             4       /* establish connection to peer */
 370 #define PRU_ACCEPT              5       /* accept connection from peer */
 371 #define PRU_DISCONNECT          6       /* disconnect from peer */
 372 #define PRU_SHUTDOWN            7       /* won't send any more data */
 373 #define PRU_RCVD                8       /* have taken data; more room now */
 374 #define PRU_SEND                9       /* send this data */
 375 #define PRU_ABORT               10      /* abort (fast DISCONNECT, DETATCH) */
 376 #define PRU_CONTROL             11      /* control operations on protocol */
 377 #define PRU_SENSE               12      /* return status into m */
 378 #define PRU_RCVOOB              13      /* retrieve out of band data */
 379 #define PRU_SENDOOB             14      /* send out of band data */
 380 #define PRU_SOCKADDR            15      /* fetch socket's address */
 381 #define PRU_PEERADDR            16      /* fetch peer's address */
 382 #define PRU_CONNECT2            17      /* connect two sockets */
 383 /* begin for protocols internal use */
 384 #define PRU_FASTTIMO            18      /* 200ms timeout */
 385 #define PRU_SLOWTIMO            19      /* 500ms timeout */
 386 #define PRU_PROTORCV            20      /* receive from below */
 387 #define PRU_PROTOSEND           21      /* send to below */
 388 /* end for protocol's internal use */
 389 #define PRU_SEND_EOF            22      /* send and close */
 390 #define PRU_NREQ                22
 391
 392 #ifdef PRUREQUESTS
 393 char *prurequests[] = {
 394         "ATTACH", "DETACH", "BIND", "LISTEN",
 395         "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
 396         "RCVD", "SEND", "ABORT", "CONTROL",
 397         "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
 398         "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
 399         "PROTORCV", "PROTOSEND", "SEND_EOF",
 400 };
 401 #endif /* PRUREQUESTS */
 402 #endif /* BSD_KERNEL_PRIVATE */
 403
 404 struct stat;
 405 struct ucred;
 406 struct uio;
 407 struct recv_msg_elem;
 408
 409 #ifdef XNU_KERNEL_PRIVATE
 410 /*
 411  * Legacy user-protocol hooks.
 412  *
 413  * NOTE: Do not modify this structure, as there are modules outside of xnu
 414  * which rely on the size and layout for binary compatibility.  This structure
 415  * is simply used by the protosw_old structure.  Internally, user-protocol
 416  * hooks use the private variant of pr_usrreqs defined down below.
 417  */
 418 struct pr_usrreqs_old {
 419 #else
 420 struct pr_usrreqs {
 421 #endif /* !XNU_KERNEL_PRIVATE */
 422         int     (*pru_abort)(struct socket *so);
 423         int     (*pru_accept)(struct socket *so, struct sockaddr **nam);
 424         int     (*pru_attach)(struct socket *so, int proto, struct proc *p);
 425         int     (*pru_bind)(struct socket *so, struct sockaddr *nam,
 426             struct proc *p);
 427         int     (*pru_connect)(struct socket *so, struct sockaddr *nam,
 428             struct proc *p);
 429         int     (*pru_connect2)(struct socket *so1, struct socket *so2);
 430         int     (*pru_control)(struct socket *so, u_long cmd, caddr_t data,
 431             struct ifnet *ifp, struct proc *p);
 432         int     (*pru_detach)(struct socket *so);
 433         int     (*pru_disconnect)(struct socket *so);
 434         int     (*pru_listen)(struct socket *so, struct proc *p);
 435         int     (*pru_peeraddr)(struct socket *so, struct sockaddr **nam);
 436         int     (*pru_rcvd)(struct socket *so, int flags);
 437         int     (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags);
 438         int     (*pru_send)(struct socket *so, int flags, struct mbuf *m,
 439             struct sockaddr *addr, struct mbuf *control,
 440             struct proc *p);
 441         int     (*pru_sense)(struct socket *so, void  *sb, int isstat64);
 442         int     (*pru_shutdown)(struct socket *so);
 443         int     (*pru_sockaddr)(struct socket *so, struct sockaddr **nam);
 444         int     (*pru_sosend)(struct socket *so, struct sockaddr *addr,
 445             struct uio *uio, struct mbuf *top, struct mbuf *control,
 446             int flags);
 447         int     (*pru_soreceive)(struct socket *so, struct sockaddr **paddr,
 448             struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
 449             int *flagsp);
 450         int     (*pru_sopoll)(struct socket *so, int events,
 451             struct ucred *cred, void *);
 452 };
 453
 454 #ifdef XNU_KERNEL_PRIVATE
 455 /*
 456  * If the ordering here looks odd, that's because it's alphabetical.  These
 457  * should eventually be merged back into struct protosw.
 458  *
 459  * Internal, private and extendable representation of pr_usrreqs.
 460  *
 461  * NOTE: When adding new ones, also add default callbacks in pru_sanitize().
 462  */
 463 struct pr_usrreqs {
 464         uint32_t pru_flags;     /* see PRUF flags below */
 465         int     (*pru_abort)(struct socket *);
 466         int     (*pru_accept)(struct socket *, struct sockaddr **);
 467         int     (*pru_attach)(struct socket *, int proto, struct proc *);
 468         int     (*pru_bind)(struct socket *, struct sockaddr *, struct proc *);
 469         int     (*pru_connect)(struct socket *, struct sockaddr *,
 470             struct proc *);
 471         int     (*pru_connect2)(struct socket *, struct socket *);
 472         int     (*pru_connectx)(struct socket *, struct sockaddr *,
 473             struct sockaddr *, struct proc *, uint32_t,
 474             sae_associd_t, sae_connid_t *, uint32_t, void *, uint32_t,
 475             struct uio *, user_ssize_t *);
 476         int     (*pru_control)(struct socket *, u_long, caddr_t,
 477             struct ifnet *, struct proc *);
 478         int     (*pru_detach)(struct socket *);
 479         int     (*pru_disconnect)(struct socket *);
 480         int     (*pru_disconnectx)(struct socket *,
 481             sae_associd_t, sae_connid_t);
 482         int     (*pru_listen)(struct socket *, struct proc *);
 483         int     (*pru_peeraddr)(struct socket *, struct sockaddr **);
 484         int     (*pru_rcvd)(struct socket *, int);
 485         int     (*pru_rcvoob)(struct socket *, struct mbuf *, int);
 486         int     (*pru_send)(struct socket *, int, struct mbuf *,
 487             struct sockaddr *, struct mbuf *, struct proc *);
 488         int     (*pru_send_list)(struct socket *, int, struct mbuf *,
 489             struct sockaddr *, struct mbuf *, struct proc *);
 490 #define PRUS_OOB        0x1
 491 #define PRUS_EOF        0x2
 492 #define PRUS_MORETOCOME 0x4
 493         int     (*pru_sense)(struct socket *, void *, int);
 494         int     (*pru_shutdown)(struct socket *);
 495         int     (*pru_sockaddr)(struct socket *, struct sockaddr **);
 496         int     (*pru_sopoll)(struct socket *, int, struct ucred *, void *);
 497         int     (*pru_soreceive)(struct socket *, struct sockaddr **,
 498             struct uio *, struct mbuf **, struct mbuf **, int *);
 499         int     (*pru_soreceive_list)(struct socket *, struct recv_msg_elem *, u_int,
 500             int *);
 501         int     (*pru_sosend)(struct socket *, struct sockaddr *,
 502             struct uio *, struct mbuf *, struct mbuf *, int);
 503         int     (*pru_sosend_list)(struct socket *, struct uio **, u_int, int);
 504         int     (*pru_socheckopt)(struct socket *, struct sockopt *);
 505         int     (*pru_preconnect)(struct socket *so);
 506 };
 507
 508 /* Values for pru_flags  */
 509 #define PRUF_OLD        0x10000000      /* added via net_add_proto */
 510
 511 #ifdef BSD_KERNEL_PRIVATE
 512 /*
 513  * For faster access than net_uptime(), bypassing the initialization.
 514  */
 515 extern u_int64_t _net_uptime;
 516 #endif /* BSD_KERNEL_PRIVATE */
 517 #endif /* XNU_KERNEL_PRIVATE */
 518
 519 __BEGIN_DECLS
 520 extern int pru_abort_notsupp(struct socket *so);
 521 extern int pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
 522 extern int pru_attach_notsupp(struct socket *so, int proto, struct proc *p);
 523 extern int pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
 524     struct proc *p);
 525 extern int pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
 526     struct proc *p);
 527 extern int pru_connect2_notsupp(struct socket *so1, struct socket *so2);
 528 #ifdef XNU_KERNEL_PRIVATE
 529 extern int pru_connectx_notsupp(struct socket *, struct sockaddr *,
 530     struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
 531     sae_connid_t *, uint32_t, void *, uint32_t, struct uio *, user_ssize_t *);
 532 extern int pru_disconnectx_notsupp(struct socket *, sae_associd_t,
 533     sae_connid_t);
 534 extern int pru_socheckopt_null(struct socket *, struct sockopt *);
 535 #endif /* XNU_KERNEL_PRIVATE */
 536 extern int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
 537     struct ifnet *ifp, struct proc *p);
 538 extern int pru_detach_notsupp(struct socket *so);
 539 extern int pru_disconnect_notsupp(struct socket *so);
 540 extern int pru_listen_notsupp(struct socket *so, struct proc *p);
 541 extern int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam);
 542 extern int pru_rcvd_notsupp(struct socket *so, int flags);
 543 extern int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags);
 544 extern int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
 545     struct sockaddr *addr, struct mbuf *control, struct proc *p);
 546 extern int pru_send_list_notsupp(struct socket *so, int flags, struct mbuf *m,
 547     struct sockaddr *addr, struct mbuf *control, struct proc *p);
 548 extern int pru_sense_null(struct socket *so, void * sb, int isstat64);
 549 extern int pru_shutdown_notsupp(struct socket *so);
 550 extern int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam);
 551 extern int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
 552     struct uio *uio, struct mbuf *top, struct mbuf *control, int flags);
 553 extern int pru_sosend_list_notsupp(struct socket *so, struct uio **uio,
 554     u_int, int flags);
 555 extern int pru_soreceive_notsupp(struct socket *so,
 556     struct sockaddr **paddr, struct uio *uio, struct mbuf **mp0,
 557     struct mbuf **controlp, int *flagsp);
 558 extern int pru_soreceive_list_notsupp(struct socket *, struct recv_msg_elem *, u_int,
 559     int *);
 560 extern int pru_sopoll_notsupp(struct socket *so, int events,
 561     struct ucred *cred, void *);
 562 #ifdef XNU_KERNEL_PRIVATE
 563 extern void pru_sanitize(struct pr_usrreqs *);
 564 extern void domaininit(void);
 565 extern void domainfin(void);
 566 extern void pfctlinput(int, struct sockaddr *);
 567 extern void pfctlinput2(int, struct sockaddr *, void *);
 568 extern struct protosw *pffindproto_locked(int, int, int);
 569 extern struct protosw *pffindprotonotype(int, int);
 570 extern struct protosw *pffindtype(int, int);
 571 extern struct protosw_old *pffindproto_old(int, int, int);
 572 extern int net_add_proto(struct protosw *, struct domain *, int)
 573 __XNU_INTERNAL(net_add_proto);
 574 extern void net_init_proto(struct protosw *, struct domain *);
 575 extern int net_del_proto(int, int, struct domain *)
 576 __XNU_INTERNAL(net_del_proto);
 577 extern int net_add_proto_old(struct protosw_old *, struct domain_old *);
 578 extern int net_del_proto_old(int, int, struct domain_old *);
 579 extern void net_update_uptime(void);
 580 extern void net_update_uptime_with_time(const struct timeval *);
 581 extern u_int64_t net_uptime(void);
 582 extern u_int64_t net_uptime_ms(void);
 583 extern void net_uptime2timeval(struct timeval *);
 584 extern struct protosw *pffindproto(int family, int protocol, int type)
 585 __XNU_INTERNAL(pffindproto);
 586 #else
 587 extern int net_add_proto(struct protosw *, struct domain *);
 588 extern int net_del_proto(int, int, struct domain *);
 589 extern struct protosw *pffindproto(int family, int protocol, int type);
 590 #endif /* XNU_KERNEL_PRIVATE */
 591 __END_DECLS
 592 #endif /* KERNEL_PRIVATE */
 593 #endif  /* !_SYS_PROTOSW_H_ */