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+/*
+ * 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 1.24 2003/06/15 10:32:01 mbr 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>
+#include <rpc/types.h>
+#include <rpc/xdr.h> /* xdrproc_t */
+#include <sys/select.h> /* fd_set */
+#include <sys/socket.h> /* socklen_t */
+#include <netinet/in.h> /* struct sockaddr_in */
+#include <rpc/auth.h> /* auth_stat */
+
+/*
+ * 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,
+ _XPRT_STAT = 0xffffffff
+};
+
+struct rpc_msg;
+
+/*
+ * Server side transport handle
+ */
+typedef struct __rpc_svcxprt {
+ int xp_sock;
+ u_short xp_port; /* associated port number */
+ 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,
+ caddr_t args_ptr);
+ /* 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,
+ caddr_t args_ptr);
+ /* destroy this struct */
+ void (*xp_destroy)(struct __rpc_svcxprt *);
+ } *xp_ops;
+ socklen_t xp_addrlen; /* length of remote address */
+ struct sockaddr_in xp_raddr; /* remote addr. (backward ABI compat) */
+ 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 */
+} 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 */
+ caddr_t rq_clntcred; /* read only cooked cred */
+ SVCXPRT *rq_xprt; /* associated transport */
+};
+
+
+/*
+ * 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)
+
+/*
+ * 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 *);
+__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;
+extern fd_set svc_fdset;
+#define svc_fds svc_fdset.fds_bits[0] /* compatibility */
+
+#ifndef _KERNEL
+/*
+ * 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
+#endif
+
+__BEGIN_DECLS
+extern void svc_getreq(int);
+extern void svc_getreqset(fd_set *);
+extern void svc_getreqset2(fd_set *, int); /* XXX: nonstd, undoc */
+extern void svc_run(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.
+ */
+
+/*
+ * 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 *);
+
+/*
+ * Added for compatibility to old rpc 4.0. Obsoleted by svc_fd_create().
+ */
+extern SVCXPRT *svcunixfd_create(int, u_int, u_int);
+__END_DECLS
+
+
+/* for backward compatibility */
+#include <rpc/svc_soc.h>
+
+#endif /* !_RPC_SVC_H */