2321c47418
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477 lines
15 KiB
C
477 lines
15 KiB
C
/* $NetBSD: svc.h,v 1.17 2000/06/02 22:57:56 fvdl Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* from: @(#)svc.h 1.35 88/12/17 SMI
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* from: @(#)svc.h 1.27 94/04/25 SMI
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* $FreeBSD$
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*/
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/*
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* svc.h, Server-side remote procedure call interface.
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*
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* Copyright (C) 1986-1993 by Sun Microsystems, Inc.
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*/
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#ifndef _RPC_SVC_H
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#define _RPC_SVC_H
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#include <sys/cdefs.h>
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/*
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* This interface must manage two items concerning remote procedure calling:
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*
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* 1) An arbitrary number of transport connections upon which rpc requests
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* are received. The two most notable transports are TCP and UDP; they are
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* created and registered by routines in svc_tcp.c and svc_udp.c, respectively;
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* they in turn call xprt_register and xprt_unregister.
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*
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* 2) An arbitrary number of locally registered services. Services are
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* described by the following four data: program number, version number,
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* "service dispatch" function, a transport handle, and a boolean that
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* indicates whether or not the exported program should be registered with a
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* local binder service; if true the program's number and version and the
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* port number from the transport handle are registered with the binder.
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* These data are registered with the rpc svc system via svc_register.
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*
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* A service's dispatch function is called whenever an rpc request comes in
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* on a transport. The request's program and version numbers must match
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* those of the registered service. The dispatch function is passed two
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* parameters, struct svc_req * and SVCXPRT *, defined below.
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*/
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/*
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* Service control requests
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*/
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#define SVCGET_VERSQUIET 1
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#define SVCSET_VERSQUIET 2
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#define SVCGET_CONNMAXREC 3
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#define SVCSET_CONNMAXREC 4
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/*
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* Operations for rpc_control().
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*/
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#define RPC_SVC_CONNMAXREC_SET 0 /* set max rec size, enable nonblock */
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#define RPC_SVC_CONNMAXREC_GET 1
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enum xprt_stat {
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XPRT_DIED,
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XPRT_MOREREQS,
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XPRT_IDLE
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};
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/*
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* Server side transport handle
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*/
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typedef struct __rpc_svcxprt {
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int xp_fd;
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#define xp_sock xp_fd
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u_short xp_port; /* associated port number */
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const struct xp_ops {
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/* receive incoming requests */
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bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *);
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/* get transport status */
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enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *);
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/* get arguments */
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bool_t (*xp_getargs)(struct __rpc_svcxprt *, xdrproc_t,
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void *);
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/* send reply */
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bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *);
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/* free mem allocated for args */
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bool_t (*xp_freeargs)(struct __rpc_svcxprt *, xdrproc_t,
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void *);
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/* destroy this struct */
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void (*xp_destroy)(struct __rpc_svcxprt *);
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} *xp_ops;
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int xp_addrlen; /* length of remote address */
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struct sockaddr_in xp_raddr; /* remote addr. (backward ABI compat) */
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/* XXX - fvdl stick this here for ABI backward compat reasons */
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const struct xp_ops2 {
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/* catch-all function */
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bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int,
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void *);
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} *xp_ops2;
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char *xp_tp; /* transport provider device name */
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char *xp_netid; /* network token */
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struct netbuf xp_ltaddr; /* local transport address */
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struct netbuf xp_rtaddr; /* remote transport address */
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struct opaque_auth xp_verf; /* raw response verifier */
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void *xp_p1; /* private: for use by svc ops */
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void *xp_p2; /* private: for use by svc ops */
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void *xp_p3; /* private: for use by svc lib */
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int xp_type; /* transport type */
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} SVCXPRT;
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/*
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* Interface to server-side authentication flavors.
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*/
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typedef struct __rpc_svcauth {
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struct svc_auth_ops {
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int (*svc_ah_wrap)(struct __rpc_svcauth *, XDR *,
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xdrproc_t, caddr_t);
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int (*svc_ah_unwrap)(struct __rpc_svcauth *, XDR *,
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xdrproc_t, caddr_t);
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} *svc_ah_ops;
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void *svc_ah_private;
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} SVCAUTH;
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/*
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* Server transport extensions (accessed via xp_p3).
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*/
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typedef struct __rpc_svcxprt_ext {
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int xp_flags; /* versquiet */
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SVCAUTH xp_auth; /* interface to auth methods */
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} SVCXPRT_EXT;
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/*
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* Service request
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*/
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struct svc_req {
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u_int32_t rq_prog; /* service program number */
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u_int32_t rq_vers; /* service protocol version */
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u_int32_t rq_proc; /* the desired procedure */
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struct opaque_auth rq_cred; /* raw creds from the wire */
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void *rq_clntcred; /* read only cooked cred */
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SVCXPRT *rq_xprt; /* associated transport */
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};
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/*
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* Approved way of getting address of caller
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*/
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#define svc_getrpccaller(x) (&(x)->xp_rtaddr)
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/*
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* Operations defined on an SVCXPRT handle
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*
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* SVCXPRT *xprt;
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* struct rpc_msg *msg;
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* xdrproc_t xargs;
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* void * argsp;
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*/
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#define SVC_RECV(xprt, msg) \
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(*(xprt)->xp_ops->xp_recv)((xprt), (msg))
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#define svc_recv(xprt, msg) \
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(*(xprt)->xp_ops->xp_recv)((xprt), (msg))
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#define SVC_STAT(xprt) \
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(*(xprt)->xp_ops->xp_stat)(xprt)
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#define svc_stat(xprt) \
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(*(xprt)->xp_ops->xp_stat)(xprt)
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#define SVC_GETARGS(xprt, xargs, argsp) \
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(*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))
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#define svc_getargs(xprt, xargs, argsp) \
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(*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp))
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#define SVC_REPLY(xprt, msg) \
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(*(xprt)->xp_ops->xp_reply) ((xprt), (msg))
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#define svc_reply(xprt, msg) \
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(*(xprt)->xp_ops->xp_reply) ((xprt), (msg))
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#define SVC_FREEARGS(xprt, xargs, argsp) \
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(*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))
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#define svc_freeargs(xprt, xargs, argsp) \
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(*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp))
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#define SVC_DESTROY(xprt) \
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(*(xprt)->xp_ops->xp_destroy)(xprt)
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#define svc_destroy(xprt) \
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(*(xprt)->xp_ops->xp_destroy)(xprt)
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#define SVC_CONTROL(xprt, rq, in) \
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(*(xprt)->xp_ops2->xp_control)((xprt), (rq), (in))
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#define SVC_EXT(xprt) \
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((SVCXPRT_EXT *) xprt->xp_p3)
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#define SVC_AUTH(xprt) \
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(SVC_EXT(xprt)->xp_auth)
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/*
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* Operations defined on an SVCAUTH handle
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*/
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#define SVCAUTH_WRAP(auth, xdrs, xfunc, xwhere) \
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((auth)->svc_ah_ops->svc_ah_wrap(auth, xdrs, xfunc, xwhere))
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#define SVCAUTH_UNWRAP(auth, xdrs, xfunc, xwhere) \
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((auth)->svc_ah_ops->svc_ah_unwrap(auth, xdrs, xfunc, xwhere))
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/*
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* Service registration
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*
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* svc_reg(xprt, prog, vers, dispatch, nconf)
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* const SVCXPRT *xprt;
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* const rpcprog_t prog;
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* const rpcvers_t vers;
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* const void (*dispatch)(struct svc_req *, SVCXPRT *);
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* const struct netconfig *nconf;
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*/
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__BEGIN_DECLS
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extern bool_t svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t,
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void (*)(struct svc_req *, SVCXPRT *),
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const struct netconfig *);
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__END_DECLS
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/*
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* Service un-registration
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*
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* svc_unreg(prog, vers)
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* const rpcprog_t prog;
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* const rpcvers_t vers;
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*/
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__BEGIN_DECLS
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extern void svc_unreg(const rpcprog_t, const rpcvers_t);
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__END_DECLS
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/*
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* Transport registration.
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*
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* xprt_register(xprt)
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* SVCXPRT *xprt;
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*/
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__BEGIN_DECLS
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extern void xprt_register(SVCXPRT *);
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__END_DECLS
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/*
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* Transport un-register
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*
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* xprt_unregister(xprt)
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* SVCXPRT *xprt;
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*/
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__BEGIN_DECLS
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extern void xprt_unregister(SVCXPRT *);
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__END_DECLS
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/*
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* When the service routine is called, it must first check to see if it
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* knows about the procedure; if not, it should call svcerr_noproc
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* and return. If so, it should deserialize its arguments via
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* SVC_GETARGS (defined above). If the deserialization does not work,
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* svcerr_decode should be called followed by a return. Successful
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* decoding of the arguments should be followed the execution of the
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* procedure's code and a call to svc_sendreply.
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*
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* Also, if the service refuses to execute the procedure due to too-
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* weak authentication parameters, svcerr_weakauth should be called.
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* Note: do not confuse access-control failure with weak authentication!
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*
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* NB: In pure implementations of rpc, the caller always waits for a reply
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* msg. This message is sent when svc_sendreply is called.
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* Therefore pure service implementations should always call
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* svc_sendreply even if the function logically returns void; use
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* xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows
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* for the abuse of pure rpc via batched calling or pipelining. In the
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* case of a batched call, svc_sendreply should NOT be called since
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* this would send a return message, which is what batching tries to avoid.
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* It is the service/protocol writer's responsibility to know which calls are
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* batched and which are not. Warning: responding to batch calls may
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* deadlock the caller and server processes!
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*/
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__BEGIN_DECLS
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extern bool_t svc_sendreply(SVCXPRT *, xdrproc_t, void *);
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extern void svcerr_decode(SVCXPRT *);
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extern void svcerr_weakauth(SVCXPRT *);
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extern void svcerr_noproc(SVCXPRT *);
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extern void svcerr_progvers(SVCXPRT *, rpcvers_t, rpcvers_t);
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extern void svcerr_auth(SVCXPRT *, enum auth_stat);
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extern void svcerr_noprog(SVCXPRT *);
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extern void svcerr_systemerr(SVCXPRT *);
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extern int rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t,
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char *(*)(char *), xdrproc_t, xdrproc_t,
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char *);
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__END_DECLS
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/*
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* Lowest level dispatching -OR- who owns this process anyway.
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* Somebody has to wait for incoming requests and then call the correct
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* service routine. The routine svc_run does infinite waiting; i.e.,
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* svc_run never returns.
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* Since another (co-existent) package may wish to selectively wait for
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* incoming calls or other events outside of the rpc architecture, the
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* routine svc_getreq is provided. It must be passed readfds, the
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* "in-place" results of a select system call (see select, section 2).
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*/
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/*
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* Global keeper of rpc service descriptors in use
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* dynamic; must be inspected before each call to select
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*/
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extern int svc_maxfd;
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#ifdef FD_SETSIZE
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extern fd_set svc_fdset;
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#define svc_fds svc_fdset.fds_bits[0] /* compatibility */
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#else
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extern int svc_fds;
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#endif /* def FD_SETSIZE */
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/*
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* A set of null auth methods used by any authentication protocols
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* that don't need to inspect or modify the message body.
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*/
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extern SVCAUTH _svc_auth_null;
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/*
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* a small program implemented by the svc_rpc implementation itself;
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* also see clnt.h for protocol numbers.
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*/
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__BEGIN_DECLS
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extern void rpctest_service(void);
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__END_DECLS
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__BEGIN_DECLS
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extern SVCXPRT *svc_xprt_alloc(void);
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extern void svc_xprt_free(SVCXPRT *);
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extern void svc_getreq(int);
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extern void svc_getreqset(fd_set *);
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extern void svc_getreq_common(int);
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struct pollfd;
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extern void svc_getreq_poll(struct pollfd *, int);
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extern void svc_run(void);
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extern void svc_exit(void);
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__END_DECLS
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/*
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* Socket to use on svcxxx_create call to get default socket
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*/
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#define RPC_ANYSOCK -1
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#define RPC_ANYFD RPC_ANYSOCK
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/*
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* These are the existing service side transport implementations
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*/
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__BEGIN_DECLS
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/*
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* Transport independent svc_create routine.
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*/
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extern int svc_create(void (*)(struct svc_req *, SVCXPRT *),
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const rpcprog_t, const rpcvers_t, const char *);
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/*
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* void (*dispatch)(struct svc_req *, SVCXPRT *);
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* const rpcprog_t prognum; -- program number
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* const rpcvers_t versnum; -- version number
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* const char *nettype; -- network type
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*/
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/*
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* Generic server creation routine. It takes a netconfig structure
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* instead of a nettype.
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*/
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extern SVCXPRT *svc_tp_create(void (*)(struct svc_req *, SVCXPRT *),
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const rpcprog_t, const rpcvers_t,
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const struct netconfig *);
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/*
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* void (*dispatch)(struct svc_req *, SVCXPRT *);
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* const rpcprog_t prognum; -- program number
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* const rpcvers_t versnum; -- version number
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* const struct netconfig *nconf; -- netconfig structure
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*/
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/*
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* Generic TLI create routine
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*/
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extern SVCXPRT *svc_tli_create(const int, const struct netconfig *,
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const struct t_bind *, const u_int,
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const u_int);
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/*
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* const int fd; -- connection end point
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* const struct netconfig *nconf; -- netconfig structure for network
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* const struct t_bind *bindaddr; -- local bind address
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* const u_int sendsz; -- max sendsize
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* const u_int recvsz; -- max recvsize
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*/
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/*
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* Connectionless and connectionful create routines
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*/
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extern SVCXPRT *svc_vc_create(const int, const u_int, const u_int);
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/*
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* const int fd; -- open connection end point
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* const u_int sendsize; -- max send size
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* const u_int recvsize; -- max recv size
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*/
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/*
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* Added for compatibility to old rpc 4.0. Obsoleted by svc_vc_create().
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*/
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extern SVCXPRT *svcunix_create(int, u_int, u_int, char *);
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extern SVCXPRT *svc_dg_create(const int, const u_int, const u_int);
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/*
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* const int fd; -- open connection
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* const u_int sendsize; -- max send size
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* const u_int recvsize; -- max recv size
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*/
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/*
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* the routine takes any *open* connection
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* descriptor as its first input and is used for open connections.
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*/
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extern SVCXPRT *svc_fd_create(const int, const u_int, const u_int);
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/*
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* const int fd; -- open connection end point
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* const u_int sendsize; -- max send size
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* const u_int recvsize; -- max recv size
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*/
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/*
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* Added for compatibility to old rpc 4.0. Obsoleted by svc_fd_create().
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*/
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extern SVCXPRT *svcunixfd_create(int, u_int, u_int);
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/*
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* Memory based rpc (for speed check and testing)
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*/
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extern SVCXPRT *svc_raw_create(void);
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/*
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* svc_dg_enable_cache() enables the cache on dg transports.
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*/
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int svc_dg_enablecache(SVCXPRT *, const u_int);
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int __rpc_get_local_uid(SVCXPRT *_transp, uid_t *_uid);
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__END_DECLS
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/* for backward compatibility */
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#include <rpc/svc_soc.h>
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#endif /* !_RPC_SVC_H */
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