xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / bsd / sys / protosw.h

diff --git a/bsd/sys/protosw.h b/bsd/sys/protosw.h
index 80c1a31207ce375ef6b670f6f5042d2b420c0156..a9f80ff068da329cb68ea59e8fb02e58d6c3c0f5 100644 (file)
--- a/bsd/sys/protosw.h
+++ b/bsd/sys/protosw.h
@@ -1,23 +1,29 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  */
 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */


@@ -60,14 +66,140 @@
 #ifndef _SYS_PROTOSW_H_
 #define _SYS_PROTOSW_H_
 
 #ifndef _SYS_PROTOSW_H_
 #define _SYS_PROTOSW_H_
 

+#include <sys/appleapiopts.h>
+#include <sys/cdefs.h>
+
+/* XXX: this will go away */
+#define PR_SLOWHZ       2               /* 2 slow timeouts per second */
+
+/*
+ * The arguments to the ctlinput routine are
+ *      (*protosw[].pr_ctlinput)(cmd, sa, arg);
+ * where cmd is one of the commands below, sa is a pointer to a sockaddr,
+ * and arg is a `void *' argument used within a protocol family.
+ */
+#define PRC_IFDOWN              0       /* interface transition */
+#define PRC_ROUTEDEAD           1       /* select new route if possible ??? */
+#define PRC_IFUP                2       /* interface has come back up */
+#define PRC_QUENCH2             3       /* DEC congestion bit says slow down */
+#define PRC_QUENCH              4       /* some one said to slow down */
+#define PRC_MSGSIZE             5       /* message size forced drop */
+#define PRC_HOSTDEAD            6       /* host appears to be down */
+#define PRC_HOSTUNREACH         7       /* deprecated (use PRC_UNREACH_HOST) */
+#define PRC_UNREACH_NET         8       /* no route to network */
+#define PRC_UNREACH_HOST        9       /* no route to host */
+#define PRC_UNREACH_PROTOCOL    10      /* dst says bad protocol */
+#define PRC_UNREACH_PORT        11      /* bad port # */
+/* was PRC_UNREACH_NEEDFRAG    12         (use PRC_MSGSIZE) */
+#define PRC_UNREACH_SRCFAIL     13      /* source route failed */
+#define PRC_REDIRECT_NET        14      /* net routing redirect */
+#define PRC_REDIRECT_HOST       15      /* host routing redirect */
+#define PRC_REDIRECT_TOSNET     16      /* redirect for type of service & net */
+#define PRC_REDIRECT_TOSHOST    17      /* redirect for tos & host */
+#define PRC_TIMXCEED_INTRANS    18      /* packet lifetime expired in transit */
+#define PRC_TIMXCEED_REASS      19      /* lifetime expired on reass q */
+#define PRC_PARAMPROB           20      /* header incorrect */
+#define PRC_UNREACH_ADMIN_PROHIB        21     /* packet administrativly prohibited */
+
+#define PRC_NCMDS               22
+
+#define PRC_IS_REDIRECT(cmd)    \
+       ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
+
+#ifdef BSD_KERNEL_PRIVATE
+#include <sys/eventhandler.h>
+#endif
+
+#ifdef KERNEL_PRIVATE
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/queue.h>
+#include <kern/locks.h>
+

 /* Forward declare these structures referenced from prototypes below. */
 struct mbuf;
 struct proc;
 struct sockaddr;
 struct socket;
 struct sockopt;
 /* Forward declare these structures referenced from prototypes below. */
 struct mbuf;
 struct proc;
 struct sockaddr;
 struct socket;
 struct sockopt;

+struct socket_filter;
+struct uio;
+struct ifnet;
+#ifdef XNU_KERNEL_PRIVATE
+struct domain_old;
+struct proc;
+#endif /* XNU_KERNEL_PRIVATE */
+
+#pragma pack(4)

 
 

-/*#ifdef _KERNEL*/
+#ifdef XNU_KERNEL_PRIVATE
+/*
+ * Legacy protocol switch table.
+ *
+ * NOTE: Do not modify this structure, as there are modules outside of xnu
+ * which rely on the size and layout for binary compatibility.  This structure
+ * is simply used by the exported net_{add,del}_proto_old, pffindproto_old
+ * routines, and by the domain_old structure.  Internally, protocol switch
+ * tables are stored in the private variant of protosw defined down below.
+ */
+struct protosw_old {
+#else
+struct protosw {
+#endif /* !XNU_KERNEL_PRIVATE */
+       short   pr_type;                /* socket type used for */
+       struct  domain *pr_domain;      /* domain protocol a member of */
+       short   pr_protocol;            /* protocol number */
+       unsigned int pr_flags;          /* see below */
+       /*
+        * protocol-protocol hooks
+        */
+       void    (*pr_input)             /* input to protocol (from below) */
+       (struct mbuf *, int len);
+       int     (*pr_output)            /* output to protocol (from above) */
+       (struct mbuf *m, struct socket *so);
+       void    (*pr_ctlinput)          /* control input (from below) */
+       (int, struct sockaddr *, void *, struct ifnet *);
+       int     (*pr_ctloutput)         /* control output (from above) */
+       (struct socket *, struct sockopt *);
+       /*
+        * user-protocol hook
+        */
+       void    *pr_ousrreq;
+       /*
+        * utility hooks
+        */
+       void    (*pr_init)(void);       /* initialization hook */
+       void    (*pr_unused)(void);     /* placeholder - fasttimo is removed */
+       void    (*pr_unused2)(void);    /* placeholder - slowtimo is removed */
+       void    (*pr_drain)(void);      /* flush any excess space possible */
+       int     (*pr_sysctl)            /* sysctl for protocol */
+       (int *, u_int, void *, size_t *, void *, size_t);
+#ifdef XNU_KERNEL_PRIVATE
+       struct  pr_usrreqs_old *pr_usrreqs; /* supersedes pr_usrreq() */
+#else
+       struct  pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
+#endif /* !XNU_KERNEL_PRIVATE */
+       int     (*pr_lock)              /* lock function for protocol */
+       (struct socket *so, int refcnt, void *debug);
+       int     (*pr_unlock)            /* unlock for protocol */
+       (struct socket *so, int refcnt, void *debug);
+       lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
+       (struct socket *so, int flags);
+       /*
+        * Implant hooks
+        */
+       TAILQ_HEAD(, socket_filter) pr_filter_head;
+#ifdef XNU_KERNEL_PRIVATE
+       struct protosw_old *pr_next;    /* chain for domain */
+#else
+       struct protosw *pr_next;        /* chain for domain */
+#endif /* !XNU_KERNEL_PRIVATE */
+       u_int32_t       reserved[1];    /* padding for future use */
+};
+
+#pragma pack()
+
+#ifdef XNU_KERNEL_PRIVATE

 /*
  * Protocol switch table.
  *
 /*
  * Protocol switch table.
  *


@@ -75,10 +207,8 @@ struct sockopt;
  * which is used for protocol-protocol and system-protocol communication.
  *
  * A protocol is called through the pr_init entry before any other.
  * which is used for protocol-protocol and system-protocol communication.
  *
  * A protocol is called through the pr_init entry before any other.

- * Thereafter it is called every 200ms through the pr_fasttimo entry and
- * every 500ms through the pr_slowtimo for timer based actions.
- * The system will call the pr_drain entry if it is low on space and
- * this should throw away any non-critical data.
+ * The system will call the pr_drain entry if it is low on space and this
+ * should throw away any non-critical data.

  *
  * Protocols pass data between themselves as chains of mbufs using
  * the pr_input and pr_output hooks.  Pr_input passes data up (towards
  *
  * Protocols pass data between themselves as chains of mbufs using
  * the pr_input and pr_output hooks.  Pr_input passes data up (towards


@@ -89,51 +219,71 @@ struct sockopt;
  *
  * The userreq routine interfaces protocols to the system and is
  * described below.
  *
  * The userreq routine interfaces protocols to the system and is
  * described below.

+ *
+ * After a protocol is attached, its pr_domain will be set to the domain
+ * which the protocol belongs to, and its pr_protosw will be set to the
+ * address of the protosw instance.  The latter is useful for finding
+ * the real/original protosw instance, in the event so_proto is altered
+ * to point to an alternative/derivative protosw.  E.g. the list of
+ * socket filters is only applicable on the original protosw instance.
+ *
+ * Internal, private and extendable representation of protosw.

  */
  */

- 
-#include <sys/appleapiopts.h>
-#include <sys/socketvar.h>
-#include <sys/queue.h>
-
-#ifdef __APPLE_API_UNSTABLE

 struct protosw {
 struct protosw {

-       short   pr_type;                /* socket type used for */
-       struct  domain *pr_domain;      /* domain protocol a member of */
-       short   pr_protocol;            /* protocol number */
-       unsigned int pr_flags;          /* see below */
-/* protocol-protocol hooks */
-       void    (*pr_input) __P((struct mbuf *, int len));
-                                       /* input to protocol (from below) */
-       int     (*pr_output)    __P((struct mbuf *m, struct socket *so));
-                                       /* output to protocol (from above) */
-       void    (*pr_ctlinput)__P((int, struct sockaddr *, void *));
-                                       /* control input (from below) */
-       int     (*pr_ctloutput)__P((struct socket *, struct sockopt *));
-                                       /* control output (from above) */
-/* user-protocol hook */
-       void    *pr_ousrreq;
-/* utility hooks */
-       void    (*pr_init) __P((void)); /* initialization hook */
-       void    (*pr_fasttimo) __P((void));
-                                       /* fast timeout (200ms) */
-       void    (*pr_slowtimo) __P((void));
-                                       /* slow timeout (500ms) */
-       void    (*pr_drain) __P((void));
-                                       /* flush any excess space possible */
-#if __APPLE__
-       int     (*pr_sysctl)();         /* sysctl for protocol */
-#endif
-       struct  pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
-#if __APPLE__
-/* Implant hooks */
-       TAILQ_HEAD(pr_sfilter, NFDescriptor) pr_sfilter;
-       struct protosw *pr_next;        /* Chain for domain */
-       u_long  reserved[4];            /* Padding for future use */
-#endif
+       TAILQ_ENTRY(protosw) pr_entry; /* chain for domain */
+       struct  domain *pr_domain;      /* domain protocol a member of */
+       struct protosw *pr_protosw;     /* pointer to self */
+       u_int16_t pr_type;              /* socket type used for */
+       u_int16_t pr_protocol;          /* protocol number */
+       u_int32_t pr_flags;             /* see below */
+       /*
+        * protocol-protocol hooks
+        */
+       void    (*pr_input)             /* input to protocol (from below) */
+       (struct mbuf *, int len);
+       int     (*pr_output)            /* output to protocol (from above) */
+       (struct mbuf *m, struct socket *so);
+       void    (*pr_ctlinput)          /* control input (from below) */
+       (int, struct sockaddr *, void *, struct ifnet *);
+       int     (*pr_ctloutput)         /* control output (from above) */
+       (struct socket *, struct sockopt *);
+       /*
+        * user-protocol hook
+        */
+       struct  pr_usrreqs *pr_usrreqs; /* user request; see list below */
+       /*
+        * utility hooks
+        */
+       void    (*pr_init)              /* initialization hook */
+       (struct protosw *, struct domain *);
+       void    (*pr_drain)(void);      /* flush any excess space possible */
+       int     (*pr_sysctl)            /* sysctl for protocol */
+       (int *, u_int, void *, size_t *, void *, size_t);
+       int     (*pr_lock)              /* lock function for protocol */
+       (struct socket *so, int refcnt, void *debug);
+       int     (*pr_unlock)            /* unlock for protocol */
+       (struct socket *so, int refcnt, void *debug);
+       lck_mtx_t *(*pr_getlock)        /* retrieve protocol lock */
+       (struct socket *so, int flags);
+       /*
+        * misc
+        */
+       TAILQ_HEAD(, socket_filter) pr_filter_head;
+       struct protosw_old *pr_old;
+
+       void    (*pr_update_last_owner) /* update last socket owner */
+       (struct socket *so, struct proc *p, struct proc *ep);
+
+       void    (*pr_copy_last_owner) /* copy last socket from listener */
+       (struct socket *so, struct socket *head);

 };
 
 };
 

-#define        PR_SLOWHZ       2               /* 2 slow timeouts per second */
-#define        PR_FASTHZ       5               /* 5 fast timeouts per second */
+/*
+ * Values for the flags argument of pr_getlock
+ */
+#define PR_F_WILLUNLOCK 0x01    /* Will unlock (e.g., msleep) after the pr_getlock call */
+
+#endif /* XNU_KERNEL_PRIVATE */

 
 /*
  * Values for pr_flags.
 
 /*
  * Values for pr_flags.


@@ -144,203 +294,34 @@ struct protosw {
  *     is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
  *     anyhow).
  */
  *     is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
  *     anyhow).
  */

-#define        PR_ATOMIC       0x01            /* exchange atomic messages only */
-#define        PR_ADDR         0x02            /* addresses given with messages */
-#define        PR_CONNREQUIRED 0x04            /* connection required by protocol */
-#define        PR_WANTRCVD     0x08            /* want PRU_RCVD calls */
-#define        PR_RIGHTS       0x10            /* passes capabilities */
-#define PR_IMPLOPCL    0x20            /* implied open/close */
-#define        PR_LASTHDR      0x40            /* enforce ipsec policy; last header */
-
-/*
- * The arguments to usrreq are:
- *     (*protosw[].pr_usrreq)(up, req, m, nam, opt);
- * where up is a (struct socket *), req is one of these requests,
- * m is a optional mbuf chain containing a message,
- * nam is an optional mbuf chain containing an address,
- * and opt is a pointer to a socketopt structure or nil.
- * The protocol is responsible for disposal of the mbuf chain m,
- * the caller is responsible for any space held by nam and opt.
- * A non-zero return from usrreq gives an
- * UNIX error number which should be passed to higher level software.
- */
-#define        PRU_ATTACH              0       /* attach protocol to up */
-#define        PRU_DETACH              1       /* detach protocol from up */
-#define        PRU_BIND                2       /* bind socket to address */
-#define        PRU_LISTEN              3       /* listen for connection */
-#define        PRU_CONNECT             4       /* establish connection to peer */
-#define        PRU_ACCEPT              5       /* accept connection from peer */
-#define        PRU_DISCONNECT          6       /* disconnect from peer */
-#define        PRU_SHUTDOWN            7       /* won't send any more data */
-#define        PRU_RCVD                8       /* have taken data; more room now */
-#define        PRU_SEND                9       /* send this data */
-#define        PRU_ABORT               10      /* abort (fast DISCONNECT, DETATCH) */
-#define        PRU_CONTROL             11      /* control operations on protocol */
-#define        PRU_SENSE               12      /* return status into m */
-#define        PRU_RCVOOB              13      /* retrieve out of band data */
-#define        PRU_SENDOOB             14      /* send out of band data */
-#define        PRU_SOCKADDR            15      /* fetch socket's address */
-#define        PRU_PEERADDR            16      /* fetch peer's address */
-#define        PRU_CONNECT2            17      /* connect two sockets */
-/* begin for protocols internal use */
-#define        PRU_FASTTIMO            18      /* 200ms timeout */
-#define        PRU_SLOWTIMO            19      /* 500ms timeout */
-#define        PRU_PROTORCV            20      /* receive from below */
-#define        PRU_PROTOSEND           21      /* send to below */
-/* end for protocol's internal use */
-#define PRU_SEND_EOF           22      /* send and close */
-#define PRU_NREQ               22
+#define PR_ATOMIC       0x01    /* exchange atomic messages only */
+#define PR_ADDR         0x02    /* addresses given with messages */
+#define PR_CONNREQUIRED 0x04    /* connection required by protocol */
+#define PR_WANTRCVD     0x08    /* want PRU_RCVD calls */
+#define PR_RIGHTS       0x10    /* passes capabilities */
+#define PR_IMPLOPCL     0x20    /* implied open/close */
+#define PR_LASTHDR      0x40    /* enforce ipsec policy; last header */
+#define PR_PROTOLOCK    0x80    /* protocol takes care of it's own locking */
+#define PR_PCBLOCK      0x100   /* protocol supports per pcb locking */
+#define PR_DISPOSE      0x200   /* protocol requires late lists disposal */
+#ifdef BSD_KERNEL_PRIVATE
+#define PR_INITIALIZED  0x400   /* protocol has been initialized */
+#define PR_ATTACHED     0x800   /* protocol is attached to a domain */
+#define PR_MULTICONN    0x1000  /* supports multiple connect calls */
+#define PR_EVCONNINFO   0x2000  /* protocol generates conninfo event */
+#define PR_PRECONN_WRITE        0x4000  /* protocol supports preconnect write */
+#define PR_DATA_IDEMPOTENT      0x8000  /* protocol supports idempotent data at connectx-time */
+#define PR_OLD          0x10000000 /* added via net_add_proto */

 
 

-#ifdef PRUREQUESTS
-char *prurequests[] = {
-       "ATTACH",       "DETACH",       "BIND",         "LISTEN",
-       "CONNECT",      "ACCEPT",       "DISCONNECT",   "SHUTDOWN",
-       "RCVD",         "SEND",         "ABORT",        "CONTROL",
-       "SENSE",        "RCVOOB",       "SENDOOB",      "SOCKADDR",
-       "PEERADDR",     "CONNECT2",     "FASTTIMO",     "SLOWTIMO",
-       "PROTORCV",     "PROTOSEND",
-       "SEND_EOF",
-};
-#endif
-
-#ifdef KERNEL                  /* users shouldn't see this decl */
-
-struct ifnet;
-struct stat;
-struct ucred;
-struct uio;
-
-/*
- * If the ordering here looks odd, that's because it's alphabetical.
- * Having this structure separated out from the main protoswitch is allegedly
- * a big (12 cycles per call) lose on high-end CPUs.  We will eventually
- * migrate this stuff back into the main structure.
- */
-struct pr_usrreqs {
-       int     (*pru_abort) __P((struct socket *so));
-       int     (*pru_accept) __P((struct socket *so, struct sockaddr **nam));
-       int     (*pru_attach) __P((struct socket *so, int proto,
-                                  struct proc *p));
-       int     (*pru_bind) __P((struct socket *so, struct sockaddr *nam,
-                                struct proc *p));
-       int     (*pru_connect) __P((struct socket *so, struct sockaddr *nam,
-                                   struct proc *p));
-       int     (*pru_connect2) __P((struct socket *so1, struct socket *so2));
-       int     (*pru_control) __P((struct socket *so, u_long cmd, caddr_t data,
-                                   struct ifnet *ifp, struct proc *p));
-       int     (*pru_detach) __P((struct socket *so));
-       int     (*pru_disconnect) __P((struct socket *so));
-       int     (*pru_listen) __P((struct socket *so, struct proc *p));
-       int     (*pru_peeraddr) __P((struct socket *so, 
-                                    struct sockaddr **nam));
-       int     (*pru_rcvd) __P((struct socket *so, int flags));
-       int     (*pru_rcvoob) __P((struct socket *so, struct mbuf *m,
-                                  int flags));
-       int     (*pru_send) __P((struct socket *so, int flags, struct mbuf *m, 
-                                struct sockaddr *addr, struct mbuf *control,
-                                struct proc *p));
-#define        PRUS_OOB        0x1
-#define        PRUS_EOF        0x2
-#define        PRUS_MORETOCOME 0x4
-       int     (*pru_sense) __P((struct socket *so, struct stat *sb));
-       int     (*pru_shutdown) __P((struct socket *so));
-       int     (*pru_sockaddr) __P((struct socket *so, 
-                                    struct sockaddr **nam));
-        
-       /*
-        * These three added later, so they are out of order.  They are used
-        * for shortcutting (fast path input/output) in some protocols.
-        * XXX - that's a lie, they are not implemented yet
-        * Rather than calling sosend() etc. directly, calls are made
-        * through these entry points.  For protocols which still use
-        * the generic code, these just point to those routines.
-        */
-       int     (*pru_sosend) __P((struct socket *so, struct sockaddr *addr,
-                                  struct uio *uio, struct mbuf *top,
-                                  struct mbuf *control, int flags));
-       int     (*pru_soreceive) __P((struct socket *so, 
-                                     struct sockaddr **paddr,
-                                     struct uio *uio, struct mbuf **mp0,
-                                     struct mbuf **controlp, int *flagsp));
-       int     (*pru_sopoll) __P((struct socket *so, int events, 
-                                  struct ucred *cred, void *));
-};
-
-extern int     pru_abort_notsupp(struct socket *so);
-extern int     pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
-extern int     pru_attach_notsupp(struct socket *so, int proto,
-                                  struct proc *p);
-extern int     pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
-                                struct proc *p);
-extern int     pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
-                                   struct proc *p);
-extern int     pru_connect2_notsupp(struct socket *so1, struct socket *so2);
-extern int     pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
-                                   struct ifnet *ifp, struct proc *p);
-extern int     pru_detach_notsupp(struct socket *so);
-extern int     pru_disconnect_notsupp(struct socket *so);
-extern int     pru_listen_notsupp(struct socket *so, struct proc *p);
-extern int     pru_peeraddr_notsupp(struct socket *so, 
-                                    struct sockaddr **nam);
-extern int     pru_rcvd_notsupp(struct socket *so, int flags);
-extern int     pru_rcvoob_notsupp(struct socket *so, struct mbuf *m,
-                                  int flags);
-extern int     pru_send_notsupp(struct socket *so, int flags, struct mbuf *m, 
-                                struct sockaddr *addr, struct mbuf *control,
-                                struct proc *p);
-extern int     pru_sense_null(struct socket *so, struct stat *sb);
-extern int     pru_shutdown_notsupp(struct socket *so);
-extern int     pru_sockaddr_notsupp(struct socket *so, 
-                                    struct sockaddr **nam);
-extern int     pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
-                                  struct uio *uio, struct mbuf *top,
-                                  struct mbuf *control, int flags);
-extern int     pru_soreceive_notsupp(struct socket *so, 
-                                     struct sockaddr **paddr,
-                                     struct uio *uio, struct mbuf **mp0,
-                                     struct mbuf **controlp, int *flagsp);
-extern int     pru_sopoll_notsupp(struct socket *so, int events, 
-                                  struct ucred *cred);
-
-
-#endif /* KERNEL */
-
-/*
- * The arguments to the ctlinput routine are
- *     (*protosw[].pr_ctlinput)(cmd, sa, arg);
- * where cmd is one of the commands below, sa is a pointer to a sockaddr,
- * and arg is a `void *' argument used within a protocol family.
- */
-#define        PRC_IFDOWN              0       /* interface transition */
-#define        PRC_ROUTEDEAD           1       /* select new route if possible ??? */
-#define        PRC_IFUP                2       /* interface has come back up */
-#define        PRC_QUENCH2             3       /* DEC congestion bit says slow down */
-#define        PRC_QUENCH              4       /* some one said to slow down */
-#define        PRC_MSGSIZE             5       /* message size forced drop */
-#define        PRC_HOSTDEAD            6       /* host appears to be down */
-#define        PRC_HOSTUNREACH         7       /* deprecated (use PRC_UNREACH_HOST) */
-#define        PRC_UNREACH_NET         8       /* no route to network */
-#define        PRC_UNREACH_HOST        9       /* no route to host */
-#define        PRC_UNREACH_PROTOCOL    10      /* dst says bad protocol */
-#define        PRC_UNREACH_PORT        11      /* bad port # */
-/* was PRC_UNREACH_NEEDFRAG    12         (use PRC_MSGSIZE) */
-#define        PRC_UNREACH_SRCFAIL     13      /* source route failed */
-#define        PRC_REDIRECT_NET        14      /* net routing redirect */
-#define        PRC_REDIRECT_HOST       15      /* host routing redirect */
-#define        PRC_REDIRECT_TOSNET     16      /* redirect for type of service & net */
-#define        PRC_REDIRECT_TOSHOST    17      /* redirect for tos & host */
-#define        PRC_TIMXCEED_INTRANS    18      /* packet lifetime expired in transit */
-#define        PRC_TIMXCEED_REASS      19      /* lifetime expired on reass q */
-#define        PRC_PARAMPROB           20      /* header incorrect */
-#define        PRC_UNREACH_ADMIN_PROHIB        21      /* packet administrativly prohibited */
-
-#define        PRC_NCMDS               22
-
-#define        PRC_IS_REDIRECT(cmd)    \
-       ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
+/* pseudo-public domain flags */
+#define PRF_USERFLAGS                                                   \
+       (PR_ATOMIC|PR_ADDR|PR_CONNREQUIRED|PR_WANTRCVD|PR_RIGHTS|       \
+       PR_IMPLOPCL|PR_LASTHDR|PR_PROTOLOCK|PR_PCBLOCK|PR_DISPOSE)
+#endif /* BSD_KERNEL_PRIVATE */

 
 

+#ifdef BSD_KERNEL_PRIVATE

 #ifdef PRCREQUESTS
 #ifdef PRCREQUESTS

-char   *prcrequests[] = {
+char    *prcrequests[] = {

        "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
        "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
        "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
        "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
        "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
        "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",


@@ -348,7 +329,7 @@ char        *prcrequests[] = {
        "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
        "PARAMPROB", "ADMIN-UNREACH"
 };
        "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
        "PARAMPROB", "ADMIN-UNREACH"
 };

-#endif
+#endif /* PRCREQUESTS */

 
 /*
  * The arguments to ctloutput are:
 
 /*
  * The arguments to ctloutput are:


@@ -363,37 +344,250 @@ char     *prcrequests[] = {
  * A non-zero return from usrreq gives an
  * UNIX error number which should be passed to higher level software.
  */
  * A non-zero return from usrreq gives an
  * UNIX error number which should be passed to higher level software.
  */

-#define        PRCO_GETOPT     0
-#define        PRCO_SETOPT     1
+#define PRCO_GETOPT     0
+#define PRCO_SETOPT     1

 
 

-#define        PRCO_NCMDS      2
+#define PRCO_NCMDS      2

 
 #ifdef PRCOREQUESTS
 
 #ifdef PRCOREQUESTS

-char   *prcorequests[] = {
+char    *prcorequests[] = {

        "GETOPT", "SETOPT",
 };
        "GETOPT", "SETOPT",
 };

-#endif
+#endif /* PRCOREQUESTS */

 
 

-#ifdef KERNEL
-void   pfctlinput __P((int, struct sockaddr *));
-void   pfctlinput2 __P((int, struct sockaddr *, void *));
-struct protosw *pffindproto __P((int family, int protocol, int type));
-struct protosw *pffindtype __P((int family, int type));
+/*
+ * In earlier BSD network stacks, a single pr_usrreq() function pointer was
+ * invoked with an operation number indicating what operation was desired.
+ * We now provide individual function pointers which protocols can implement,
+ * which offers a number of benefits (such as type checking for arguments).
+ * These older constants are still present in order to support TCP debugging.
+ */
+#define PRU_ATTACH              0       /* attach protocol to up */
+#define PRU_DETACH              1       /* detach protocol from up */
+#define PRU_BIND                2       /* bind socket to address */
+#define PRU_LISTEN              3       /* listen for connection */
+#define PRU_CONNECT             4       /* establish connection to peer */
+#define PRU_ACCEPT              5       /* accept connection from peer */
+#define PRU_DISCONNECT          6       /* disconnect from peer */
+#define PRU_SHUTDOWN            7       /* won't send any more data */
+#define PRU_RCVD                8       /* have taken data; more room now */
+#define PRU_SEND                9       /* send this data */
+#define PRU_ABORT               10      /* abort (fast DISCONNECT, DETATCH) */
+#define PRU_CONTROL             11      /* control operations on protocol */
+#define PRU_SENSE               12      /* return status into m */
+#define PRU_RCVOOB              13      /* retrieve out of band data */
+#define PRU_SENDOOB             14      /* send out of band data */
+#define PRU_SOCKADDR            15      /* fetch socket's address */
+#define PRU_PEERADDR            16      /* fetch peer's address */
+#define PRU_CONNECT2            17      /* connect two sockets */
+/* begin for protocols internal use */
+#define PRU_FASTTIMO            18      /* 200ms timeout */
+#define PRU_SLOWTIMO            19      /* 500ms timeout */
+#define PRU_PROTORCV            20      /* receive from below */
+#define PRU_PROTOSEND           21      /* send to below */
+/* end for protocol's internal use */
+#define PRU_SEND_EOF            22      /* send and close */
+#define PRU_NREQ                22

 
 

-extern int net_add_proto(struct protosw *, struct domain *);
-extern int net_del_proto(int, int, struct domain *);
+#ifdef PRUREQUESTS
+char *prurequests[] = {
+       "ATTACH", "DETACH", "BIND", "LISTEN",
+       "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
+       "RCVD", "SEND", "ABORT", "CONTROL",
+       "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
+       "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
+       "PROTORCV", "PROTOSEND", "SEND_EOF",
+};
+#endif /* PRUREQUESTS */
+#endif /* BSD_KERNEL_PRIVATE */
+
+struct stat;
+struct ucred;
+struct uio;
+struct recv_msg_elem;
+
+#ifdef XNU_KERNEL_PRIVATE
+/*
+ * Legacy user-protocol hooks.
+ *
+ * NOTE: Do not modify this structure, as there are modules outside of xnu
+ * which rely on the size and layout for binary compatibility.  This structure
+ * is simply used by the protosw_old structure.  Internally, user-protocol
+ * hooks use the private variant of pr_usrreqs defined down below.
+ */
+struct pr_usrreqs_old {
+#else
+struct pr_usrreqs {
+#endif /* !XNU_KERNEL_PRIVATE */
+       int     (*pru_abort)(struct socket *so);
+       int     (*pru_accept)(struct socket *so, struct sockaddr **nam);
+       int     (*pru_attach)(struct socket *so, int proto, struct proc *p);
+       int     (*pru_bind)(struct socket *so, struct sockaddr *nam,
+           struct proc *p);
+       int     (*pru_connect)(struct socket *so, struct sockaddr *nam,
+           struct proc *p);
+       int     (*pru_connect2)(struct socket *so1, struct socket *so2);
+       int     (*pru_control)(struct socket *so, u_long cmd, caddr_t data,
+           struct ifnet *ifp, struct proc *p);
+       int     (*pru_detach)(struct socket *so);
+       int     (*pru_disconnect)(struct socket *so);
+       int     (*pru_listen)(struct socket *so, struct proc *p);
+       int     (*pru_peeraddr)(struct socket *so, struct sockaddr **nam);
+       int     (*pru_rcvd)(struct socket *so, int flags);
+       int     (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags);
+       int     (*pru_send)(struct socket *so, int flags, struct mbuf *m,
+           struct sockaddr *addr, struct mbuf *control,
+           struct proc *p);
+       int     (*pru_sense)(struct socket *so, void  *sb, int isstat64);
+       int     (*pru_shutdown)(struct socket *so);
+       int     (*pru_sockaddr)(struct socket *so, struct sockaddr **nam);
+       int     (*pru_sosend)(struct socket *so, struct sockaddr *addr,
+           struct uio *uio, struct mbuf *top, struct mbuf *control,
+           int flags);
+       int     (*pru_soreceive)(struct socket *so, struct sockaddr **paddr,
+           struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
+           int *flagsp);
+       int     (*pru_sopoll)(struct socket *so, int events,
+           struct ucred *cred, void *);
+};
+
+#ifdef XNU_KERNEL_PRIVATE
+/*
+ * If the ordering here looks odd, that's because it's alphabetical.  These
+ * should eventually be merged back into struct protosw.
+ *
+ * Internal, private and extendable representation of pr_usrreqs.
+ *
+ * NOTE: When adding new ones, also add default callbacks in pru_sanitize().
+ */
+struct pr_usrreqs {
+       uint32_t pru_flags;     /* see PRUF flags below */
+       int     (*pru_abort)(struct socket *);
+       int     (*pru_accept)(struct socket *, struct sockaddr **);
+       int     (*pru_attach)(struct socket *, int proto, struct proc *);
+       int     (*pru_bind)(struct socket *, struct sockaddr *, struct proc *);
+       int     (*pru_connect)(struct socket *, struct sockaddr *,
+           struct proc *);
+       int     (*pru_connect2)(struct socket *, struct socket *);
+       int     (*pru_connectx)(struct socket *, struct sockaddr *,
+           struct sockaddr *, struct proc *, uint32_t,
+           sae_associd_t, sae_connid_t *, uint32_t, void *, uint32_t,
+           struct uio *, user_ssize_t *);
+       int     (*pru_control)(struct socket *, u_long, caddr_t,
+           struct ifnet *, struct proc *);
+       int     (*pru_detach)(struct socket *);
+       int     (*pru_disconnect)(struct socket *);
+       int     (*pru_disconnectx)(struct socket *,
+           sae_associd_t, sae_connid_t);
+       int     (*pru_listen)(struct socket *, struct proc *);
+       int     (*pru_peeraddr)(struct socket *, struct sockaddr **);
+       int     (*pru_rcvd)(struct socket *, int);
+       int     (*pru_rcvoob)(struct socket *, struct mbuf *, int);
+       int     (*pru_send)(struct socket *, int, struct mbuf *,
+           struct sockaddr *, struct mbuf *, struct proc *);
+       int     (*pru_send_list)(struct socket *, int, struct mbuf *,
+           struct sockaddr *, struct mbuf *, struct proc *);
+#define PRUS_OOB        0x1
+#define PRUS_EOF        0x2
+#define PRUS_MORETOCOME 0x4
+       int     (*pru_sense)(struct socket *, void *, int);
+       int     (*pru_shutdown)(struct socket *);
+       int     (*pru_sockaddr)(struct socket *, struct sockaddr **);
+       int     (*pru_sopoll)(struct socket *, int, struct ucred *, void *);
+       int     (*pru_soreceive)(struct socket *, struct sockaddr **,
+           struct uio *, struct mbuf **, struct mbuf **, int *);
+       int     (*pru_soreceive_list)(struct socket *, struct recv_msg_elem *, u_int,
+           int *);
+       int     (*pru_sosend)(struct socket *, struct sockaddr *,
+           struct uio *, struct mbuf *, struct mbuf *, int);
+       int     (*pru_sosend_list)(struct socket *, struct uio **, u_int, int);
+       int     (*pru_socheckopt)(struct socket *, struct sockopt *);
+       int     (*pru_preconnect)(struct socket *so);
+};

 
 

-/* Temp hack to link static domains together */
+/* Values for pru_flags  */
+#define PRUF_OLD        0x10000000      /* added via net_add_proto */

 
 

-#define LINK_PROTOS(psw) \
-static void link_ ## psw ## _protos() \
-{ \
-      int i; \
-                \
-    for (i=0; i < ((sizeof(psw)/sizeof(psw[0])) - 1); i++) \
-            psw[i].pr_next = &psw[i + 1]; \
-} 
+#ifdef BSD_KERNEL_PRIVATE
+/*
+ * For faster access than net_uptime(), bypassing the initialization.
+ */
+extern u_int64_t _net_uptime;
+#endif /* BSD_KERNEL_PRIVATE */
+#endif /* XNU_KERNEL_PRIVATE */

 
 

-#endif
-#endif /* __APPLE_API_UNSTABLE */
-#endif /* !_SYS_PROTOSW_H_ */
+__BEGIN_DECLS
+extern int pru_abort_notsupp(struct socket *so);
+extern int pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
+extern int pru_attach_notsupp(struct socket *so, int proto, struct proc *p);
+extern int pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
+    struct proc *p);
+extern int pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
+    struct proc *p);
+extern int pru_connect2_notsupp(struct socket *so1, struct socket *so2);
+#ifdef XNU_KERNEL_PRIVATE
+extern int pru_connectx_notsupp(struct socket *, struct sockaddr *,
+    struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
+    sae_connid_t *, uint32_t, void *, uint32_t, struct uio *, user_ssize_t *);
+extern int pru_disconnectx_notsupp(struct socket *, sae_associd_t,
+    sae_connid_t);
+extern int pru_socheckopt_null(struct socket *, struct sockopt *);
+#endif /* XNU_KERNEL_PRIVATE */
+extern int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
+    struct ifnet *ifp, struct proc *p);
+extern int pru_detach_notsupp(struct socket *so);
+extern int pru_disconnect_notsupp(struct socket *so);
+extern int pru_listen_notsupp(struct socket *so, struct proc *p);
+extern int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam);
+extern int pru_rcvd_notsupp(struct socket *so, int flags);
+extern int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags);
+extern int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
+    struct sockaddr *addr, struct mbuf *control, struct proc *p);
+extern int pru_send_list_notsupp(struct socket *so, int flags, struct mbuf *m,
+    struct sockaddr *addr, struct mbuf *control, struct proc *p);
+extern int pru_sense_null(struct socket *so, void * sb, int isstat64);
+extern int pru_shutdown_notsupp(struct socket *so);
+extern int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam);
+extern int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
+    struct uio *uio, struct mbuf *top, struct mbuf *control, int flags);
+extern int pru_sosend_list_notsupp(struct socket *so, struct uio **uio,
+    u_int, int flags);
+extern int pru_soreceive_notsupp(struct socket *so,
+    struct sockaddr **paddr, struct uio *uio, struct mbuf **mp0,
+    struct mbuf **controlp, int *flagsp);
+extern int pru_soreceive_list_notsupp(struct socket *, struct recv_msg_elem *, u_int,
+    int *);
+extern int pru_sopoll_notsupp(struct socket *so, int events,
+    struct ucred *cred, void *);
+#ifdef XNU_KERNEL_PRIVATE
+extern void pru_sanitize(struct pr_usrreqs *);
+extern void domaininit(void);
+extern void domainfin(void);
+extern void pfctlinput(int, struct sockaddr *);
+extern void pfctlinput2(int, struct sockaddr *, void *);
+extern struct protosw *pffindproto_locked(int, int, int);
+extern struct protosw *pffindprotonotype(int, int);
+extern struct protosw *pffindtype(int, int);
+extern struct protosw_old *pffindproto_old(int, int, int);
+extern int net_add_proto(struct protosw *, struct domain *, int)
+__XNU_INTERNAL(net_add_proto);
+extern void net_init_proto(struct protosw *, struct domain *);
+extern int net_del_proto(int, int, struct domain *)
+__XNU_INTERNAL(net_del_proto);
+extern int net_add_proto_old(struct protosw_old *, struct domain_old *);
+extern int net_del_proto_old(int, int, struct domain_old *);
+extern void net_update_uptime(void);
+extern void net_update_uptime_with_time(const struct timeval *);
+extern u_int64_t net_uptime(void);
+extern u_int64_t net_uptime_ms(void);
+extern void net_uptime2timeval(struct timeval *);
+extern struct protosw *pffindproto(int family, int protocol, int type)
+__XNU_INTERNAL(pffindproto);
+#else
+extern int net_add_proto(struct protosw *, struct domain *);
+extern int net_del_proto(int, int, struct domain *);
+extern struct protosw *pffindproto(int family, int protocol, int type);
+#endif /* XNU_KERNEL_PRIVATE */
+__END_DECLS
+#endif /* KERNEL_PRIVATE */
+#endif  /* !_SYS_PROTOSW_H_ */