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- #ifndef RPC_SVC_H
- #define RPC_SVC_H
- /*
- * $Id: svc.h,v 1.1.1.1 2001/11/26 22:21:19 tboeckel Exp $
- *
- * Server-side remote procedure call interface.
- *
- * Copyright © 1994 AmiTCP/IP Group,
- * Network Solutions Development Inc.
- * All rights reserved.
- *
- */
- /* @(#)svc.h 2.2 88/07/29 4.0 RPCSRC; from 1.20 88/02/08 SMI */
-
- /*
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
- /*
- * 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 {
- int xp_sock;
- u_short xp_port; /* associated port number */
- struct xp_ops {
- bool_t (*xp_recv)(struct SVCXPRT *xprt, struct rpc_msg *msg); /* receive incomming requests */
- enum xprt_stat (*xp_stat)(struct SVCXPRT *xprt); /* get transport status */
- bool_t (*xp_getargs)(struct SVCXPRT *xprt, xdrproc_t xargs,
- void * argsp); /* get arguments */
- bool_t (*xp_reply)(struct SVCXPRT *xprt,
- struct rpc_msg *msg); /* send reply */
- bool_t (*xp_freeargs)(struct SVCXPRT *xprt, xdrproc_t xargs,
- void * argsp);/* free mem allocated for args */
- void (*xp_destroy)(struct SVCXPRT *xprt); /* destroy this struct */
- } *xp_ops;
- long 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 */
- } SVCXPRT;
-
- /*
- * 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 {
- u_long rq_prog; /* service program number */
- u_long rq_vers; /* service protocol version */
- u_long 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 */
- };
-
-
- /*
- * Service registration
- *
- * protocol is like TCP or UDP, zero means do not register
- */
- extern bool_t svc_register(SVCXPRT * xprt, u_long prog, u_long vers,
- void (* dispatch)(struct svc_req *, SVCXPRT *),
- int protocol);
-
- /*
- * Service un-registration
- */
- extern void svc_unregister(u_long prog, u_long vers);
-
- /*
- * Transport registration.
- */
- extern void xprt_register(SVCXPRT * xprt);
-
- /*
- * Transport un-register
- */
- extern void xprt_unregister(SVCXPRT * xprt);
-
-
-
-
- /*
- * 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);
- extern void svcerr_decode(SVCXPRT * xprt);
- extern void svcerr_weakauth(SVCXPRT * xprt);
- extern void svcerr_noproc(SVCXPRT * xprt);
- extern void svcerr_progvers(SVCXPRT * xprt,
- u_long low_vers, u_long high_vers);
- extern void svcerr_auth(SVCXPRT * xprt, enum auth_stat why);
- extern void svcerr_noprog(SVCXPRT * xprt);
- extern void svcerr_systemerr(SVCXPRT * xprt);
-
- /*
- * 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
- */
- #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.
- */
- extern void rpctest_service();
-
- extern void svc_getreq(int rdfds);
- extern void svc_getreqset(fd_set * readfds); /* takes fdset instead of int */
- extern void svc_run(void); /* never returns */
-
- /*
- * 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);
-
- /*
- * Udp based rpc.
- */
- extern SVCXPRT *svcudp_create(int sock);
- extern SVCXPRT *svcudp_bufcreate(int sock, u_int sendsz, u_int recvsz);
-
- /*
- * Tcp based rpc.
- */
- extern SVCXPRT *svctcp_create(int sock, u_int sendsize, u_int recvsize);
-
- #endif /* !RPC_SVC_H */
-