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//==========================================================================

//

//      include/sys/protosw.h

//

//      

//

//==========================================================================

//####BSDCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from OpenBSD or other sources,

// and are covered by the appropriate copyright disclaimers included herein.

//

// -------------------------------------------

//

//####BSDCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

/*      $OpenBSD: protosw.h,v 1.3 1996/04/21 22:31:54 deraadt Exp $     */

/*      $NetBSD: protosw.h,v 1.10 1996/04/09 20:55:32 cgd Exp $ */

/*-

 * Copyright (c) 1982, 1986, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      @(#)protosw.h   8.1 (Berkeley) 6/2/93

 */

#ifndef _SYS_PROTOSW_H_

#define _SYS_PROTOSW_H_

/*

 * Protocol switch table.

 *

 * Each protocol has a handle initializing one of these structures,

 * 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.

 *

 * Protocols pass data between themselves as chains of mbufs using

 * the pr_input and pr_output hooks.  Pr_input passes data up (towards

 * UNIX) and pr_output passes it down (towards the imps); control

 * information passes up and down on pr_ctlinput and pr_ctloutput.

 * The protocol is responsible for the space occupied by any the

 * arguments to these entries and must dispose it.

 *

 * The userreq routine interfaces protocols to the system and is

 * described below.

 */

struct mbuf;

struct sockaddr;

struct socket;

struct domain;

struct protosw {

        short   pr_type;                /* socket type used for */

        struct  domain *pr_domain;      /* domain protocol a member of */

        short   pr_protocol;            /* protocol number */

        short   pr_flags;               /* see below */

/* protocol-protocol hooks */

        void    (*pr_input)             /* input to protocol (from below) */

                        __P((struct mbuf *, ...));

        int     (*pr_output)            /* output to protocol (from above) */

                        __P((struct mbuf *, ...));

        void    *(*pr_ctlinput)         /* control input (from below) */

                        __P((int, struct sockaddr *, void *));

        int     (*pr_ctloutput)         /* control output (from above) */

                        __P((int, struct socket *, int, int, struct mbuf **));

/* user-protocol hook */

        int     (*pr_usrreq)            /* user request: see list below */

                        __P((struct socket *, int, struct mbuf *,

                             struct mbuf *, struct mbuf *));

/* utility hooks */

        void    (*pr_init)              /* initialization hook */

                        __P((void));

        void    (*pr_fasttimo)          /* fast timeout (200ms) */

                        __P((void));

        void    (*pr_slowtimo)          /* slow timeout (500ms) */

                        __P((void));

        void    (*pr_drain)             /* flush any excess space possible */

                        __P((void));

        int     (*pr_sysctl)            /* sysctl for protocol */

                        __P((int *, u_int, void *, size_t *, void *, size_t));

};

#define PR_SLOWHZ       2               /* 2 slow timeouts per second */

#define PR_FASTHZ       5               /* 5 fast timeouts per second */

/*

 * Values for pr_flags.

 * PR_ADDR requires PR_ATOMIC;

 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.

 */

#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 */

/*

 * 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 */

#define PRU_NREQ                21

#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",

};

#endif

/*

 * 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 an optional caddr_t argument used within a protocol family.

 */

#define PRC_IFDOWN              0        /* interface transition */

#define PRC_ROUTEDEAD           1       /* select new route if possible ??? */

#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_NCMDS               21

#define PRC_IS_REDIRECT(cmd)    \

        ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)

#ifdef PRCREQUESTS

char    *prcrequests[] = {

        "IFDOWN", "ROUTEDEAD", "#2", "DEC-BIT-QUENCH2",

        "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",

        "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",

        "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",

        "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",

        "PARAMPROB"

};

#endif

/*

 * The arguments to ctloutput are:

 *      (*protosw[].pr_ctloutput)(req, so, level, optname, optval);

 * req is one of the actions listed below, so is a (struct socket *),

 * level is an indication of which protocol layer the option is intended.

 * optname is a protocol dependent socket option request,

 * optval is a pointer to a mbuf-chain pointer, for value-return results.

 * The protocol is responsible for disposal of the mbuf chain *optval

 * if supplied,

 * the caller is responsible for any space held by *optval, when returned.

 * 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_NCMDS      2

#ifdef PRCOREQUESTS

char    *prcorequests[] = {

        "GETOPT", "SETOPT",

};

#endif

#ifdef _KERNEL

struct sockaddr;

struct protosw *pffindproto __P((int, int, int));

struct protosw *pffindtype __P((int, int));

void pfctlinput __P((int, struct sockaddr *));

#endif

#endif // _SYS_PROTOSW_H_