forked from KolibriOS/kolibrios
317 lines
10 KiB
C
317 lines
10 KiB
C
/*
|
|
* 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 <sys/cdefs.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;
|
|
unsigned 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,
|
|
char* 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,
|
|
char* 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 */
|
|
char* xp_p1; /* private */
|
|
char* 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;
|
|
* char* 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 */
|
|
char* 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,
|
|
char* __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, unsigned int __sendsz, unsigned int __recvsz)
|
|
__THROW;
|
|
|
|
/*
|
|
* Tcp based rpc.
|
|
*/
|
|
extern SVCXPRT *svctcp_create (int __sock, unsigned int __sendsize, unsigned int __recvsize)
|
|
__THROW;
|
|
|
|
|
|
/*
|
|
* Unix based rpc.
|
|
*/
|
|
extern SVCXPRT *svcunix_create (int __sock, unsigned int __sendsize, unsigned int __recvsize,
|
|
char *__path) __THROW;
|
|
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* rpc/svc.h */
|