[thirdparty/glibc.git] / sunrpc / rpc / svc.h

/*
 * 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, MERCHANTIBILITY 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
 */

/*
 * svc.h, Server-side remote procedure call interface.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#ifndef _RPC_SVC_H
#define _RPC_SVC_H 1

#include <features.h>
#include <rpc/rpc_msg.h>

__BEGIN_DECLS

/*
 * 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.
 */

enum xprt_stat {
	XPRT_DIED,
	XPRT_MOREREQS,
	XPRT_IDLE
};

/*
 * Server side transport handle
 */
typedef struct SVCXPRT SVCXPRT;
struct SVCXPRT {
  int xp_sock;
  u_short xp_port;		/* associated port number */
  const struct xp_ops {
    bool_t	(*xp_recv) (SVCXPRT *__xprt, struct rpc_msg *__msg);
				/* receive incoming requests */
    enum xprt_stat (*xp_stat) (SVCXPRT *__xprt);
				/* get transport status */
    bool_t	(*xp_getargs) (SVCXPRT *__xprt, xdrproc_t __xdr_args,
			       caddr_t __args_ptr); /* get arguments */
    bool_t	(*xp_reply) (SVCXPRT *__xprt, struct rpc_msg *__msg);
				/* send reply */
    bool_t	(*xp_freeargs) (SVCXPRT *__xprt, xdrproc_t __xdr_args,
				caddr_t __args_ptr);
				/* free mem allocated for args */
    void	(*xp_destroy) (SVCXPRT *__xprt);
				/* destroy this struct */
  } *xp_ops;
  int		xp_addrlen;	 /* length of remote address */
  struct sockaddr_in xp_raddr;	 /* remote address */
  struct opaque_auth xp_verf;	 /* raw response verifier */
  caddr_t		xp_p1;		 /* private */
  caddr_t		xp_p2;		 /* private */
  char		xp_pad [256];	/* padding, internal use */
};

/*
 *  Approved way of getting address of caller
 */
#define svc_getcaller(x) (&(x)->xp_raddr)

/*
 * Operations defined on an SVCXPRT handle
 *
 * SVCXPRT		*xprt;
 * struct rpc_msg	*msg;
 * xdrproc_t		 xargs;
 * caddr_t		 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)


/*
 * Service request
 */
struct svc_req {
  rpcprog_t rq_prog;            /* service program number */
  rpcvers_t rq_vers;            /* service protocol version */
  rpcproc_t rq_proc;            /* the desired procedure */
  struct opaque_auth rq_cred;   /* raw creds from the wire */
  caddr_t rq_clntcred;          /* read only cooked cred */
  SVCXPRT *rq_xprt;             /* associated transport */
};

#ifndef __DISPATCH_FN_T
#define __DISPATCH_FN_T
typedef void (*__dispatch_fn_t) (struct svc_req*, SVCXPRT*);
#endif

/*
 * Service registration
 *
 * svc_register(xprt, prog, vers, dispatch, protocol)
 *	SVCXPRT *xprt;
 *	rpcprog_t prog;
 *	rpcvers_t vers;
 *	void (*dispatch)(struct svc_req*, SVCXPRT*);
 *	rpcprot_t protocol;  like TCP or UDP, zero means do not register
 */
extern bool_t svc_register (SVCXPRT *__xprt, rpcprog_t __prog,
			    rpcvers_t __vers, __dispatch_fn_t __dispatch,
			    rpcprot_t __protocol) __THROW;

/*
 * Service un-registration
 *
 * svc_unregister(prog, vers)
 *	rpcprog_t prog;
 *	rpcvers_t vers;
 */
extern void svc_unregister (rpcprog_t __prog, rpcvers_t __vers) __THROW;

/*
 * Transport registration.
 *
 * xprt_register(xprt)
 *	SVCXPRT *xprt;
 */
extern void xprt_register (SVCXPRT *__xprt) __THROW;

/*
 * Transport un-register
 *
 * xprt_unregister(xprt)
 *	SVCXPRT *xprt;
 */
extern void xprt_unregister (SVCXPRT *__xprt) __THROW;


/*
 * 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!
 */

extern bool_t	svc_sendreply (SVCXPRT *__xprt, xdrproc_t __xdr_results,
			       caddr_t __xdr_location) __THROW;

extern void	svcerr_decode (SVCXPRT *__xprt) __THROW;

extern void	svcerr_weakauth (SVCXPRT *__xprt) __THROW;

extern void	svcerr_noproc (SVCXPRT *__xprt) __THROW;

extern void	svcerr_progvers (SVCXPRT *__xprt, rpcvers_t __low_vers,
				 rpcvers_t __high_vers) __THROW;

extern void	svcerr_auth (SVCXPRT *__xprt, enum auth_stat __why) __THROW;

extern void	svcerr_noprog (SVCXPRT *__xprt) __THROW;

extern void	svcerr_systemerr (SVCXPRT *__xprt) __THROW;

/*
 * 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 (coexistent) 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 struct pollfd *svc_pollfd;
extern int svc_max_pollfd;
extern fd_set svc_fdset;
#define svc_fds svc_fdset.fds_bits[0]	/* compatibility */

/*
 * a small program implemented by the svc_rpc implementation itself;
 * also see clnt.h for protocol numbers.
 */
extern void svc_getreq (int __rdfds) __THROW;
extern void svc_getreq_common (const int __fd) __THROW;
extern void svc_getreqset (fd_set *__readfds) __THROW;
extern void svc_getreq_poll (struct pollfd *, const int) __THROW;
extern void svc_exit (void) __THROW;
extern void svc_run (void) __THROW;

/*
 * Socket to use on svcxxx_create call to get default socket
 */
#define	RPC_ANYSOCK	-1

/*
 * These are the existing service side transport implementations
 */

/*
 * Memory based rpc for testing and timing.
 */
extern SVCXPRT *svcraw_create (void) __THROW;

/*
 * Udp based rpc.
 */
extern SVCXPRT *svcudp_create (int __sock) __THROW;
extern SVCXPRT *svcudp_bufcreate (int __sock, u_int __sendsz, u_int __recvsz)
     __THROW;

/*
 * Tcp based rpc.
 */
extern SVCXPRT *svctcp_create (int __sock, u_int __sendsize, u_int __recvsize)
     __THROW;

/*
 * FD based rpc.
 */
extern SVCXPRT *svcfd_create (int __sock, u_int __sendsize, u_int __recvsize)
     __THROW;

/*
 * Unix based rpc.
 */
extern SVCXPRT *svcunix_create (int __sock, u_int __sendsize, u_int __recvsize,
				char *__path) __THROW;


__END_DECLS

#endif /* rpc/svc.h */
Commit	Line	Data
cb636bb2 UD	1	/*
	2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	3	* unrestricted use provided that this legend is included on all tape
	4	* media and as a part of the software program in whole or part. Users
	5	* may copy or modify Sun RPC without charge, but are not authorized
	6	* to license or distribute it to anyone else except as part of a product or
	7	* program developed by the user.
	8	*
	9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	12	*
	13	* Sun RPC is provided with no support and without any obligation on the
	14	* part of Sun Microsystems, Inc. to assist in its use, correction,
	15	* modification or enhancement.
	16	*
	17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	19	* OR ANY PART THEREOF.
	20	*
	21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	22	* or profits or other special, indirect and consequential damages, even if
	23	* Sun has been advised of the possibility of such damages.
	24	*
	25	* Sun Microsystems, Inc.
	26	* 2550 Garcia Avenue
	27	* Mountain View, California 94043
	28	*/
	29
28f540f4 RM	30	/*
	31	* svc.h, Server-side remote procedure call interface.
	32	*
	33	* Copyright (C) 1984, Sun Microsystems, Inc.
	34	*/
	35
5107cf1d UD	36	#ifndef _RPC_SVC_H
5107cf1d UD	37	#define _RPC_SVC_H 1
28f540f4	38
e7fd8a39 UD	39	#include <features.h>
	40	#include <rpc/rpc_msg.h>
	41
fc933e28 RM	42	__BEGIN_DECLS
fc933e28 RM	43
28f540f4 RM	44	/*
	45	* This interface must manage two items concerning remote procedure calling:
	46	*
	47	* 1) An arbitrary number of transport connections upon which rpc requests
	48	* are received. The two most notable transports are TCP and UDP; they are
	49	* created and registered by routines in svc_tcp.c and svc_udp.c, respectively;
	50	* they in turn call xprt_register and xprt_unregister.
	51	*
	52	* 2) An arbitrary number of locally registered services. Services are
	53	* described by the following four data: program number, version number,
	54	* "service dispatch" function, a transport handle, and a boolean that
	55	* indicates whether or not the exported program should be registered with a
	56	* local binder service; if true the program's number and version and the
	57	* port number from the transport handle are registered with the binder.
	58	* These data are registered with the rpc svc system via svc_register.
	59	*
	60	* A service's dispatch function is called whenever an rpc request comes in
	61	* on a transport. The request's program and version numbers must match
	62	* those of the registered service. The dispatch function is passed two
	63	* parameters, struct svc_req * and SVCXPRT *, defined below.
	64	*/
	65
	66	enum xprt_stat {
	67	XPRT_DIED,
	68	XPRT_MOREREQS,
	69	XPRT_IDLE
	70	};
	71
	72	/*
	73	* Server side transport handle
	74	*/
e7fd8a39 UD	75	typedef struct SVCXPRT SVCXPRT;
	76	struct SVCXPRT {
	77	int xp_sock;
	78	u_short xp_port; /* associated port number */
	79	const struct xp_ops {
c1422e5b	80	bool_t (xp_recv) (SVCXPRT __xprt, struct rpc_msg *__msg);
e7fd8a39	81	/* receive incoming requests */
c1422e5b	82	enum xprt_stat (xp_stat) (SVCXPRT __xprt);
e7fd8a39	83	/* get transport status */
c1422e5b	84	bool_t (xp_getargs) (SVCXPRT __xprt, xdrproc_t __xdr_args,
d82a27f8	85	caddr_t __args_ptr); /* get arguments */
c1422e5b	86	bool_t (xp_reply) (SVCXPRT __xprt, struct rpc_msg *__msg);
e7fd8a39	87	/* send reply */
c1422e5b	88	bool_t (xp_freeargs) (SVCXPRT __xprt, xdrproc_t __xdr_args,
d82a27f8	89	caddr_t __args_ptr);
e7fd8a39	90	/* free mem allocated for args */
c1422e5b	91	void (xp_destroy) (SVCXPRT __xprt);
e7fd8a39 UD	92	/* destroy this struct */
	93	} *xp_ops;
	94	int xp_addrlen; /* length of remote address */
be18eced	95	struct sockaddr_in xp_raddr; /* remote address */
e7fd8a39 UD	96	struct opaque_auth xp_verf; /* raw response verifier */
	97	caddr_t xp_p1; /* private */
	98	caddr_t xp_p2; /* private */
ada24bb2	99	char xp_pad [256]; /* padding, internal use */
e7fd8a39	100	};
28f540f4 RM	101
	102	/*
	103	* Approved way of getting address of caller
	104	*/
	105	#define svc_getcaller(x) (&(x)->xp_raddr)
	106
	107	/*
	108	* Operations defined on an SVCXPRT handle
	109	*
	110	* SVCXPRT *xprt;
	111	* struct rpc_msg *msg;
	112	* xdrproc_t xargs;
	113	* caddr_t argsp;
	114	*/
	115	#define SVC_RECV(xprt, msg) \
	116	(*(xprt)->xp_ops->xp_recv)((xprt), (msg))
	117	#define svc_recv(xprt, msg) \
	118	(*(xprt)->xp_ops->xp_recv)((xprt), (msg))
	119
	120	#define SVC_STAT(xprt) \
	121	(*(xprt)->xp_ops->xp_stat)(xprt)
	122	#define svc_stat(xprt) \
	123	(*(xprt)->xp_ops->xp_stat)(xprt)
	124
	125	#define SVC_GETARGS(xprt, xargs, argsp) \
	126	(*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))
	127	#define svc_getargs(xprt, xargs, argsp) \
	128	(*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))
	129
	130	#define SVC_REPLY(xprt, msg) \
	131	(*(xprt)->xp_ops->xp_reply) ((xprt), (msg))
	132	#define svc_reply(xprt, msg) \
	133	(*(xprt)->xp_ops->xp_reply) ((xprt), (msg))
	134
	135	#define SVC_FREEARGS(xprt, xargs, argsp) \
	136	(*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))
	137	#define svc_freeargs(xprt, xargs, argsp) \
	138	(*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))
	139
	140	#define SVC_DESTROY(xprt) \
	141	(*(xprt)->xp_ops->xp_destroy)(xprt)
	142	#define svc_destroy(xprt) \
	143	(*(xprt)->xp_ops->xp_destroy)(xprt)
	144
	145
	146	/*
	147	* Service request
	148	*/
	149	struct svc_req {
bdb04ee8 UD	150	rpcprog_t rq_prog; /* service program number */
	151	rpcvers_t rq_vers; /* service protocol version */
	152	rpcproc_t rq_proc; /* the desired procedure */
	153	struct opaque_auth rq_cred; /* raw creds from the wire */
	154	caddr_t rq_clntcred; /* read only cooked cred */
	155	SVCXPRT rq_xprt; / associated transport */
28f540f4 RM	156	};
28f540f4 RM	157
76b87c03	158	#ifndef __DISPATCH_FN_T
50304ef0	159	#define __DISPATCH_FN_T
c1422e5b	160	typedef void (__dispatch_fn_t) (struct svc_req, SVCXPRT*);
50304ef0	161	#endif
28f540f4 RM	162
	163	/*
	164	* Service registration
	165	*
	166	* svc_register(xprt, prog, vers, dispatch, protocol)
	167	* SVCXPRT *xprt;
bdb04ee8 UD	168	* rpcprog_t prog;
bdb04ee8 UD	169	* rpcvers_t vers;
0ebfb8d7	170	* void (dispatch)(struct svc_req, SVCXPRT*);
bdb04ee8	171	* rpcprot_t protocol; like TCP or UDP, zero means do not register
28f540f4	172	*/
c1422e5b UD	173	extern bool_t svc_register (SVCXPRT *__xprt, rpcprog_t __prog,
	174	rpcvers_t __vers, __dispatch_fn_t __dispatch,
	175	rpcprot_t __protocol) __THROW;
28f540f4 RM	176
	177	/*
	178	* Service un-registration
	179	*
	180	* svc_unregister(prog, vers)
bdb04ee8 UD	181	* rpcprog_t prog;
bdb04ee8 UD	182	* rpcvers_t vers;
28f540f4	183	*/
c1422e5b	184	extern void svc_unregister (rpcprog_t __prog, rpcvers_t __vers) __THROW;
28f540f4 RM	185
	186	/*
	187	* Transport registration.
	188	*
	189	* xprt_register(xprt)
	190	* SVCXPRT *xprt;
	191	*/
c1422e5b	192	extern void xprt_register (SVCXPRT *__xprt) __THROW;
28f540f4 RM	193
	194	/*
	195	* Transport un-register
	196	*
	197	* xprt_unregister(xprt)
	198	* SVCXPRT *xprt;
	199	*/
c1422e5b	200	extern void xprt_unregister (SVCXPRT *__xprt) __THROW;
28f540f4 RM	201
	202
	203	/*
	204	* When the service routine is called, it must first check to see if it
	205	* knows about the procedure; if not, it should call svcerr_noproc
fc933e28	206	* and return. If so, it should deserialize its arguments via
28f540f4 RM	207	* SVC_GETARGS (defined above). If the deserialization does not work,
	208	* svcerr_decode should be called followed by a return. Successful
	209	* decoding of the arguments should be followed the execution of the
	210	* procedure's code and a call to svc_sendreply.
	211	*
	212	* Also, if the service refuses to execute the procedure due to too-
	213	* weak authentication parameters, svcerr_weakauth should be called.
	214	* Note: do not confuse access-control failure with weak authentication!
	215	*
	216	* NB: In pure implementations of rpc, the caller always waits for a reply
fc933e28	217	* msg. This message is sent when svc_sendreply is called.
28f540f4 RM	218	* Therefore pure service implementations should always call
	219	* svc_sendreply even if the function logically returns void; use
	220	* xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows
	221	* for the abuse of pure rpc via batched calling or pipelining. In the
	222	* case of a batched call, svc_sendreply should NOT be called since
	223	* this would send a return message, which is what batching tries to avoid.
	224	* It is the service/protocol writer's responsibility to know which calls are
	225	* batched and which are not. Warning: responding to batch calls may
	226	* deadlock the caller and server processes!
	227	*/
	228
d82a27f8	229	extern bool_t svc_sendreply (SVCXPRT *__xprt, xdrproc_t __xdr_results,
c1422e5b	230	caddr_t __xdr_location) __THROW;
fc933e28	231
c1422e5b	232	extern void svcerr_decode (SVCXPRT *__xprt) __THROW;
fc933e28	233
c1422e5b	234	extern void svcerr_weakauth (SVCXPRT *__xprt) __THROW;
fc933e28	235
c1422e5b	236	extern void svcerr_noproc (SVCXPRT *__xprt) __THROW;
fc933e28	237
c1422e5b UD	238	extern void svcerr_progvers (SVCXPRT *__xprt, rpcvers_t __low_vers,
c1422e5b UD	239	rpcvers_t __high_vers) __THROW;
fc933e28	240
c1422e5b	241	extern void svcerr_auth (SVCXPRT *__xprt, enum auth_stat __why) __THROW;
fc933e28	242
c1422e5b	243	extern void svcerr_noprog (SVCXPRT *__xprt) __THROW;
fc933e28	244
c1422e5b	245	extern void svcerr_systemerr (SVCXPRT *__xprt) __THROW;
fc933e28	246
28f540f4 RM	247	/*
	248	* Lowest level dispatching -OR- who owns this process anyway.
	249	* Somebody has to wait for incoming requests and then call the correct
	250	* service routine. The routine svc_run does infinite waiting; i.e.,
	251	* svc_run never returns.
5b826692	252	* Since another (coexistent) package may wish to selectively wait for
28f540f4 RM	253	* incoming calls or other events outside of the rpc architecture, the
	254	* routine svc_getreq is provided. It must be passed readfds, the
	255	* "in-place" results of a select system call (see select, section 2).
	256	*/
	257
	258	/*
	259	* Global keeper of rpc service descriptors in use
fc933e28	260	* dynamic; must be inspected before each call to select
28f540f4	261	*/
bdb04ee8 UD	262
	263	extern struct pollfd *svc_pollfd;
	264	extern int svc_max_pollfd;
28f540f4 RM	265	extern fd_set svc_fdset;
28f540f4 RM	266	#define svc_fds svc_fdset.fds_bits[0] /* compatibility */
28f540f4 RM	267
	268	/*
	269	* a small program implemented by the svc_rpc implementation itself;
	270	* also see clnt.h for protocol numbers.
	271	*/
c1422e5b UD	272	extern void svc_getreq (int __rdfds) __THROW;
	273	extern void svc_getreq_common (const int __fd) __THROW;
	274	extern void svc_getreqset (fd_set *__readfds) __THROW;
	275	extern void svc_getreq_poll (struct pollfd *, const int) __THROW;
	276	extern void svc_exit (void) __THROW;
	277	extern void svc_run (void) __THROW;
28f540f4 RM	278
	279	/*
	280	* Socket to use on svcxxx_create call to get default socket
	281	*/
	282	#define RPC_ANYSOCK -1
	283
	284	/*
	285	* These are the existing service side transport implementations
	286	*/
	287
	288	/*
	289	* Memory based rpc for testing and timing.
	290	*/
c1422e5b	291	extern SVCXPRT *svcraw_create (void) __THROW;
28f540f4 RM	292
	293	/*
	294	* Udp based rpc.
	295	*/
c1422e5b UD	296	extern SVCXPRT *svcudp_create (int __sock) __THROW;
	297	extern SVCXPRT *svcudp_bufcreate (int __sock, u_int __sendsz, u_int __recvsz)
	298	__THROW;
28f540f4 RM	299
	300	/*
	301	* Tcp based rpc.
	302	*/
c1422e5b UD	303	extern SVCXPRT *svctcp_create (int __sock, u_int __sendsize, u_int __recvsize)
c1422e5b UD	304	__THROW;
28f540f4	305
2bcaff08 UD	306	/*
	307	* FD based rpc.
	308	*/
	309	extern SVCXPRT *svcfd_create (int __sock, u_int __sendsize, u_int __recvsize)
	310	__THROW;
28f540f4	311
e852e889 UD	312	/*
	313	* Unix based rpc.
	314	*/
c1422e5b UD	315	extern SVCXPRT *svcunix_create (int __sock, u_int __sendsize, u_int __recvsize,
c1422e5b UD	316	char *__path) __THROW;
e852e889 UD	317
e852e889 UD	318
fc933e28	319	__END_DECLS
28f540f4	320
5107cf1d	321	#endif /* rpc/svc.h */