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/*      $NetBSD: svc.h,v 1.17 2000/06/02 22:57:56 fvdl Exp $    */

/*

 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for

 * unrestricted use provided that this legend is included on all tape

 * media and as a part of the software program in whole or part.  Users

 * may copy or modify Sun RPC without charge, but are not authorized

 * to license or distribute it to anyone else except as part of a product or

 * program developed by the user.

 *

 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE

 * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.

 *

 * Sun RPC is provided with no support and without any obligation on the

 * part of Sun Microsystems, Inc. to assist in its use, correction,

 * modification or enhancement.

 *

 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE

 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC

 * OR ANY PART THEREOF.

 *

 * In no event will Sun Microsystems, Inc. be liable for any lost revenue

 * or profits or other special, indirect and consequential damages, even if

 * Sun has been advised of the possibility of such damages.

 *

 * Sun Microsystems, Inc.

 * 2550 Garcia Avenue

 * Mountain View, California  94043

 *

 *      from: @(#)svc.h 1.35 88/12/17 SMI

 *      from: @(#)svc.h      1.27    94/04/25 SMI

 * $FreeBSD: src/include/rpc/svc.h,v 1.22 2002/04/28 15:18:45 des Exp $

 */

/*

 * svc.h, Server-side remote procedure call interface.

 *

 * Copyright (C) 1986-1993 by Sun Microsystems, Inc.

 */

#ifndef _RPC_SVC_H

#define _RPC_SVC_H

#include <sys/cdefs.h>

/*

 * This interface must manage two items concerning remote procedure calling:

 *

 * 1) An arbitrary number of transport connections upon which rpc requests

 * are received.  The two most notable transports are TCP and UDP;  they are

 * created and registered by routines in svc_tcp.c and svc_udp.c, respectively;

 * they in turn call xprt_register and xprt_unregister.

 *

 * 2) An arbitrary number of locally registered services.  Services are

 * described by the following four data: program number, version number,

 * "service dispatch" function, a transport handle, and a boolean that

 * indicates whether or not the exported program should be registered with a

 * local binder service;  if true the program's number and version and the

 * port number from the transport handle are registered with the binder.

 * These data are registered with the rpc svc system via svc_register.

 *

 * A service's dispatch function is called whenever an rpc request comes in

 * on a transport.  The request's program and version numbers must match

 * those of the registered service.  The dispatch function is passed two

 * parameters, struct svc_req * and SVCXPRT *, defined below.

 */

/*

 *      Service control requests

 */

#define SVCGET_VERSQUIET        1

#define SVCSET_VERSQUIET        2

enum xprt_stat {

        XPRT_DIED,

        XPRT_MOREREQS,

        XPRT_IDLE

};

/*

 * Server side transport handle

 */

typedef struct __rpc_svcxprt {

        int             xp_fd;

        u_short         xp_port;         /* associated port number */

        const struct xp_ops {

            /* receive incoming requests */

            bool_t      (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *);

            /* get transport status */

            enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *);

            /* get arguments */

            bool_t      (*xp_getargs)(struct __rpc_svcxprt *, xdrproc_t,

                                void *);

            /* send reply */

            bool_t      (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *);

            /* free mem allocated for args */

            bool_t      (*xp_freeargs)(struct __rpc_svcxprt *, xdrproc_t,

                                void *);

            /* destroy this struct */

            void        (*xp_destroy)(struct __rpc_svcxprt *);

        } *xp_ops;

        int             xp_addrlen;      /* length of remote address */

        struct sockaddr_in xp_raddr;     /* remote addr. (backward ABI compat) */

        /* XXX - fvdl stick this here for ABI backward compat reasons */

        const struct xp_ops2 {

                /* catch-all function */

                bool_t  (*xp_control)(struct __rpc_svcxprt *, const u_int,

                                void *);

        } *xp_ops2;

        char            *xp_tp;          /* transport provider device name */

        char            *xp_netid;       /* network token */

        struct netbuf   xp_ltaddr;       /* local transport address */

        struct netbuf   xp_rtaddr;       /* remote transport address */

        struct opaque_auth xp_verf;      /* raw response verifier */

        void            *xp_p1;          /* private: for use by svc ops */

        void            *xp_p2;          /* private: for use by svc ops */

        void            *xp_p3;          /* private: for use by svc lib */

        int             xp_type;         /* transport type */

} SVCXPRT;

/*

 * Service request

 */

struct svc_req {

        u_int32_t       rq_prog;        /* service program number */

        u_int32_t       rq_vers;        /* service protocol version */

        u_int32_t       rq_proc;        /* the desired procedure */

        struct opaque_auth rq_cred;     /* raw creds from the wire */

        void            *rq_clntcred;   /* read only cooked cred */

        SVCXPRT         *rq_xprt;       /* associated transport */

};

/*

 *  Approved way of getting address of caller

 */

#define svc_getrpccaller(x) (&(x)->xp_rtaddr)

/*

 * FreeBSD-only definition to get the creds of the caller (AF_LOCAL).

 */

#define __svc_getcallercreds(x) ((struct cmsgcred *)(x)->xp_p2)

/*

 * Operations defined on an SVCXPRT handle

 *

 * SVCXPRT              *xprt;

 * struct rpc_msg       *msg;

 * xdrproc_t             xargs;

 * void *                argsp;

 */

#define SVC_RECV(xprt, msg)                             \

        (*(xprt)->xp_ops->xp_recv)((xprt), (msg))

#define svc_recv(xprt, msg)                             \

        (*(xprt)->xp_ops->xp_recv)((xprt), (msg))

#define SVC_STAT(xprt)                                  \

        (*(xprt)->xp_ops->xp_stat)(xprt)

#define svc_stat(xprt)                                  \

        (*(xprt)->xp_ops->xp_stat)(xprt)

#define SVC_GETARGS(xprt, xargs, argsp)                 \

        (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))

#define svc_getargs(xprt, xargs, argsp)                 \

        (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))

#define SVC_REPLY(xprt, msg)                            \

        (*(xprt)->xp_ops->xp_reply) ((xprt), (msg))

#define svc_reply(xprt, msg)                            \

        (*(xprt)->xp_ops->xp_reply) ((xprt), (msg))

#define SVC_FREEARGS(xprt, xargs, argsp)                \

        (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))

#define svc_freeargs(xprt, xargs, argsp)                \

        (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))

#define SVC_DESTROY(xprt)                               \

        (*(xprt)->xp_ops->xp_destroy)(xprt)

#define svc_destroy(xprt)                               \

        (*(xprt)->xp_ops->xp_destroy)(xprt)

#define SVC_CONTROL(xprt, rq, in)                       \

        (*(xprt)->xp_ops2->xp_control)((xprt), (rq), (in))

/*

 * Service registration

 *

 * svc_reg(xprt, prog, vers, dispatch, nconf)

 *      const SVCXPRT *xprt;

 *      const rpcprog_t prog;

 *      const rpcvers_t vers;

 *      const void (*dispatch)();

 *      const struct netconfig *nconf;

 */

__BEGIN_DECLS

extern bool_t   svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t,

                        void (*)(struct svc_req *, SVCXPRT *),

                        const struct netconfig *);

__END_DECLS

/*

 * Service un-registration

 *

 * svc_unreg(prog, vers)

 *      const rpcprog_t prog;

 *      const rpcvers_t vers;

 */

__BEGIN_DECLS

extern void     svc_unreg(const rpcprog_t, const rpcvers_t);

__END_DECLS

/*

 * Transport registration.

 *

 * xprt_register(xprt)

 *      SVCXPRT *xprt;

 */

__BEGIN_DECLS

extern void     xprt_register(SVCXPRT *);

__END_DECLS

/*

 * Transport un-register

 *

 * xprt_unregister(xprt)

 *      SVCXPRT *xprt;

 */

__BEGIN_DECLS

extern void     xprt_unregister(SVCXPRT *);

__END_DECLS

/*

 * When the service routine is called, it must first check to see if it

 * knows about the procedure;  if not, it should call svcerr_noproc

 * and return.  If so, it should deserialize its arguments via

 * SVC_GETARGS (defined above).  If the deserialization does not work,

 * svcerr_decode should be called followed by a return.  Successful

 * decoding of the arguments should be followed the execution of the

 * procedure's code and a call to svc_sendreply.

 *

 * Also, if the service refuses to execute the procedure due to too-

 * weak authentication parameters, svcerr_weakauth should be called.

 * Note: do not confuse access-control failure with weak authentication!

 *

 * NB: In pure implementations of rpc, the caller always waits for a reply

 * msg.  This message is sent when svc_sendreply is called.

 * Therefore pure service implementations should always call

 * svc_sendreply even if the function logically returns void;  use

 * xdr.h - xdr_void for the xdr routine.  HOWEVER, tcp based rpc allows

 * for the abuse of pure rpc via batched calling or pipelining.  In the

 * case of a batched call, svc_sendreply should NOT be called since

 * this would send a return message, which is what batching tries to avoid.

 * It is the service/protocol writer's responsibility to know which calls are

 * batched and which are not.  Warning: responding to batch calls may

 * deadlock the caller and server processes!

 */

__BEGIN_DECLS

extern bool_t   svc_sendreply(SVCXPRT *, xdrproc_t, void *);

extern void     svcerr_decode(SVCXPRT *);

extern void     svcerr_weakauth(SVCXPRT *);

extern void     svcerr_noproc(SVCXPRT *);

extern void     svcerr_progvers(SVCXPRT *, rpcvers_t, rpcvers_t);

extern void     svcerr_auth(SVCXPRT *, enum auth_stat);

extern void     svcerr_noprog(SVCXPRT *);

extern void     svcerr_systemerr(SVCXPRT *);

extern int      rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t,

                        char *(*)(char *), xdrproc_t, xdrproc_t,

                        char *);

__END_DECLS

/*

 * Lowest level dispatching -OR- who owns this process anyway.

 * Somebody has to wait for incoming requests and then call the correct

 * service routine.  The routine svc_run does infinite waiting; i.e.,

 * svc_run never returns.

 * Since another (co-existant) package may wish to selectively wait for

 * incoming calls or other events outside of the rpc architecture, the

 * routine svc_getreq is provided.  It must be passed readfds, the

 * "in-place" results of a select system call (see select, section 2).

 */

/*

 * Global keeper of rpc service descriptors in use

 * dynamic; must be inspected before each call to select

 */

extern int svc_maxfd;

#ifdef FD_SETSIZE

extern fd_set svc_fdset;

#define svc_fds svc_fdset.fds_bits[0]   /* compatibility */

#else

extern int svc_fds;

#endif /* def FD_SETSIZE */

/*

 * a small program implemented by the svc_rpc implementation itself;

 * also see clnt.h for protocol numbers.

 */

__BEGIN_DECLS

extern void rpctest_service(void);

__END_DECLS

__BEGIN_DECLS

extern void     svc_getreq(int);

extern void     svc_getreqset(fd_set *);

extern void     svc_getreq_common(int);

struct pollfd;

extern void     svc_getreq_poll(struct pollfd *, int);

extern void     svc_run(void);

extern void     svc_exit(void);

__END_DECLS

/*

 * Socket to use on svcxxx_create call to get default socket

 */

#define RPC_ANYSOCK     -1

#define RPC_ANYFD       RPC_ANYSOCK

/*

 * These are the existing service side transport implementations

 */

__BEGIN_DECLS

/*

 * Transport independent svc_create routine.

 */

extern int svc_create(void (*)(struct svc_req *, SVCXPRT *),

                           const rpcprog_t, const rpcvers_t, const char *);

/*

 *      void (*dispatch)();             -- dispatch routine

 *      const rpcprog_t prognum;        -- program number

 *      const rpcvers_t versnum;        -- version number

 *      const char *nettype;            -- network type

 */

/*

 * Generic server creation routine. It takes a netconfig structure

 * instead of a nettype.

 */

extern SVCXPRT *svc_tp_create(void (*)(struct svc_req *, SVCXPRT *),

                                   const rpcprog_t, const rpcvers_t,

                                   const struct netconfig *);

        /*

         * void (*dispatch)();            -- dispatch routine

         * const rpcprog_t prognum;       -- program number

         * const rpcvers_t versnum;       -- version number

         * const struct netconfig *nconf; -- netconfig structure

         */

/*

 * Generic TLI create routine

 */

extern SVCXPRT *svc_tli_create(const int, const struct netconfig *,

                               const struct t_bind *, const u_int,

                               const u_int);

/*

 *      const int fd;                   -- connection end point

 *      const struct netconfig *nconf;  -- netconfig structure for network

 *      const struct t_bind *bindaddr;  -- local bind address

 *      const u_int sendsz;             -- max sendsize

 *      const u_int recvsz;             -- max recvsize

 */

/*

 * Connectionless and connectionful create routines

 */

extern SVCXPRT *svc_vc_create(const int, const u_int, const u_int);

/*

 *      const int fd;                           -- open connection end point

 *      const u_int sendsize;                   -- max send size

 *      const u_int recvsize;                   -- max recv size

 */

/*

 * Added for compatibility to old rpc 4.0. Obsoleted by svc_vc_create().

 */

extern SVCXPRT *svcunix_create(int, u_int, u_int, char *);

extern SVCXPRT *svc_dg_create(const int, const u_int, const u_int);

        /*

         * const int fd;                                -- open connection

         * const u_int sendsize;                        -- max send size

         * const u_int recvsize;                        -- max recv size

         */

/*

 * the routine takes any *open* connection

 * descriptor as its first input and is used for open connections.

 */

extern SVCXPRT *svc_fd_create(const int, const u_int, const u_int);

/*

 *      const int fd;                           -- open connection end point

 *      const u_int sendsize;                   -- max send size

 *      const u_int recvsize;                   -- max recv size

 */

/*

 * Added for compatibility to old rpc 4.0. Obsoleted by svc_fd_create().

 */

extern SVCXPRT *svcunixfd_create(int, u_int, u_int);

/*

 * Memory based rpc (for speed check and testing)

 */

extern SVCXPRT *svc_raw_create(void);

/*

 * svc_dg_enable_cache() enables the cache on dg transports.

 */

int svc_dg_enablecache(SVCXPRT *, const u_int);

int __rpc_get_local_uid(SVCXPRT *_transp, uid_t *_uid);

__END_DECLS

/* for backward compatibility */

#include <rpc/svc_soc.h>

#endif /* !_RPC_SVC_H */