373 lines
9.3 KiB
C
373 lines
9.3 KiB
C
/* $NetBSD: rpc_prot.c,v 1.16 2000/06/02 23:11:13 fvdl Exp $ */
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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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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* rpc_prot.c
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* This set of routines implements the rpc message definition,
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* its serializer and some common rpc utility routines.
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* The routines are meant for various implementations of rpc -
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* they are NOT for the rpc client or rpc service implementations!
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* Because authentication stuff is easy and is part of rpc, the opaque
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* routines are also in this program.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <rpc/auth.h>
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#include <rpc/clnt.h>
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#include <rpc/rpc_msg.h>
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MALLOC_DEFINE(M_RPC, "rpc", "Remote Procedure Call");
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#define assert(exp) KASSERT(exp, ("bad arguments"))
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static enum clnt_stat accepted(enum accept_stat, struct rpc_err *);
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static enum clnt_stat rejected(enum reject_stat, struct rpc_err *);
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/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
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struct opaque_auth _null_auth;
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/*
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* XDR an opaque authentication struct
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* (see auth.h)
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*/
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bool_t
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xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap)
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{
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assert(xdrs != NULL);
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assert(ap != NULL);
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if (xdr_enum(xdrs, &(ap->oa_flavor)))
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return (xdr_bytes(xdrs, &ap->oa_base,
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&ap->oa_length, MAX_AUTH_BYTES));
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return (FALSE);
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}
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/* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
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/*
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* XDR the MSG_ACCEPTED part of a reply message union
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*/
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bool_t
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xdr_accepted_reply(XDR *xdrs, struct accepted_reply *ar)
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{
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enum accept_stat *par_stat;
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assert(xdrs != NULL);
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assert(ar != NULL);
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par_stat = &ar->ar_stat;
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/* personalized union, rather than calling xdr_union */
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if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
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return (FALSE);
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if (! xdr_enum(xdrs, (enum_t *) par_stat))
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return (FALSE);
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switch (ar->ar_stat) {
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case SUCCESS:
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if (ar->ar_results.proc != (xdrproc_t) xdr_void)
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return ((*(ar->ar_results.proc))(xdrs,
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ar->ar_results.where));
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else
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return (TRUE);
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case PROG_MISMATCH:
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if (! xdr_uint32_t(xdrs, &(ar->ar_vers.low)))
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return (FALSE);
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return (xdr_uint32_t(xdrs, &(ar->ar_vers.high)));
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case GARBAGE_ARGS:
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case SYSTEM_ERR:
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case PROC_UNAVAIL:
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case PROG_UNAVAIL:
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break;
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}
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return (TRUE); /* TRUE => open ended set of problems */
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}
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/*
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* XDR the MSG_DENIED part of a reply message union
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*/
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bool_t
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xdr_rejected_reply(XDR *xdrs, struct rejected_reply *rr)
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{
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enum reject_stat *prj_stat;
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enum auth_stat *prj_why;
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assert(xdrs != NULL);
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assert(rr != NULL);
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prj_stat = &rr->rj_stat;
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/* personalized union, rather than calling xdr_union */
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if (! xdr_enum(xdrs, (enum_t *) prj_stat))
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return (FALSE);
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switch (rr->rj_stat) {
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case RPC_MISMATCH:
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if (! xdr_uint32_t(xdrs, &(rr->rj_vers.low)))
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return (FALSE);
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return (xdr_uint32_t(xdrs, &(rr->rj_vers.high)));
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case AUTH_ERROR:
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prj_why = &rr->rj_why;
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return (xdr_enum(xdrs, (enum_t *) prj_why));
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}
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/* NOTREACHED */
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assert(0);
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return (FALSE);
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}
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static const struct xdr_discrim reply_dscrm[3] = {
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{ (int)MSG_ACCEPTED, (xdrproc_t)xdr_accepted_reply },
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{ (int)MSG_DENIED, (xdrproc_t)xdr_rejected_reply },
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{ __dontcare__, NULL_xdrproc_t } };
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/*
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* XDR a reply message
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*/
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bool_t
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xdr_replymsg(XDR *xdrs, struct rpc_msg *rmsg)
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{
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int32_t *buf;
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enum msg_type *prm_direction;
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enum reply_stat *prp_stat;
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assert(xdrs != NULL);
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assert(rmsg != NULL);
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if (xdrs->x_op == XDR_DECODE) {
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buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
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if (buf != NULL) {
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rmsg->rm_xid = IXDR_GET_UINT32(buf);
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rmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
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if (rmsg->rm_direction != REPLY) {
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return (FALSE);
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}
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rmsg->rm_reply.rp_stat =
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IXDR_GET_ENUM(buf, enum reply_stat);
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if (rmsg->rm_reply.rp_stat == MSG_ACCEPTED)
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return (xdr_accepted_reply(xdrs,
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&rmsg->acpted_rply));
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else if (rmsg->rm_reply.rp_stat == MSG_DENIED)
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return (xdr_rejected_reply(xdrs,
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&rmsg->rjcted_rply));
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else
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return (FALSE);
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}
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}
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prm_direction = &rmsg->rm_direction;
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prp_stat = &rmsg->rm_reply.rp_stat;
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if (
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xdr_uint32_t(xdrs, &(rmsg->rm_xid)) &&
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xdr_enum(xdrs, (enum_t *) prm_direction) &&
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(rmsg->rm_direction == REPLY) )
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return (xdr_union(xdrs, (enum_t *) prp_stat,
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(caddr_t)(void *)&(rmsg->rm_reply.ru), reply_dscrm,
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NULL_xdrproc_t));
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return (FALSE);
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}
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/*
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* Serializes the "static part" of a call message header.
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* The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
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* The rm_xid is not really static, but the user can easily munge on the fly.
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*/
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bool_t
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xdr_callhdr(XDR *xdrs, struct rpc_msg *cmsg)
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{
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enum msg_type *prm_direction;
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assert(xdrs != NULL);
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assert(cmsg != NULL);
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prm_direction = &cmsg->rm_direction;
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cmsg->rm_direction = CALL;
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cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
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if (
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(xdrs->x_op == XDR_ENCODE) &&
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xdr_uint32_t(xdrs, &(cmsg->rm_xid)) &&
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xdr_enum(xdrs, (enum_t *) prm_direction) &&
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xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
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xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_prog)) )
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return (xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_vers)));
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return (FALSE);
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}
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/* ************************** Client utility routine ************* */
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static enum clnt_stat
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accepted(enum accept_stat acpt_stat, struct rpc_err *error)
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{
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assert(error != NULL);
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switch (acpt_stat) {
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case PROG_UNAVAIL:
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error->re_status = RPC_PROGUNAVAIL;
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return (RPC_PROGUNAVAIL);
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case PROG_MISMATCH:
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error->re_status = RPC_PROGVERSMISMATCH;
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return (RPC_PROGVERSMISMATCH);
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case PROC_UNAVAIL:
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return (RPC_PROCUNAVAIL);
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case GARBAGE_ARGS:
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return (RPC_CANTDECODEARGS);
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case SYSTEM_ERR:
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return (RPC_SYSTEMERROR);
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case SUCCESS:
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return (RPC_SUCCESS);
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}
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/* NOTREACHED */
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/* something's wrong, but we don't know what ... */
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error->re_lb.s1 = (int32_t)MSG_ACCEPTED;
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error->re_lb.s2 = (int32_t)acpt_stat;
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return (RPC_FAILED);
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}
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static enum clnt_stat
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rejected(enum reject_stat rjct_stat, struct rpc_err *error)
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{
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assert(error != NULL);
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switch (rjct_stat) {
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case RPC_MISMATCH:
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return (RPC_VERSMISMATCH);
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case AUTH_ERROR:
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return (RPC_AUTHERROR);
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}
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/* something's wrong, but we don't know what ... */
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/* NOTREACHED */
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error->re_lb.s1 = (int32_t)MSG_DENIED;
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error->re_lb.s2 = (int32_t)rjct_stat;
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return (RPC_FAILED);
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}
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/*
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* given a reply message, fills in the error
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*/
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enum clnt_stat
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_seterr_reply(struct rpc_msg *msg, struct rpc_err *error)
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{
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enum clnt_stat stat;
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assert(msg != NULL);
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assert(error != NULL);
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/* optimized for normal, SUCCESSful case */
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switch (msg->rm_reply.rp_stat) {
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case MSG_ACCEPTED:
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if (msg->acpted_rply.ar_stat == SUCCESS) {
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stat = RPC_SUCCESS;
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return (stat);
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}
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stat = accepted(msg->acpted_rply.ar_stat, error);
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break;
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case MSG_DENIED:
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stat = rejected(msg->rjcted_rply.rj_stat, error);
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break;
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default:
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stat = RPC_FAILED;
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error->re_lb.s1 = (int32_t)(msg->rm_reply.rp_stat);
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break;
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}
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error->re_status = stat;
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switch (stat) {
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case RPC_VERSMISMATCH:
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error->re_vers.low = msg->rjcted_rply.rj_vers.low;
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error->re_vers.high = msg->rjcted_rply.rj_vers.high;
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break;
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case RPC_AUTHERROR:
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error->re_why = msg->rjcted_rply.rj_why;
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break;
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case RPC_PROGVERSMISMATCH:
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error->re_vers.low = msg->acpted_rply.ar_vers.low;
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error->re_vers.high = msg->acpted_rply.ar_vers.high;
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break;
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case RPC_FAILED:
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case RPC_SUCCESS:
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case RPC_PROGNOTREGISTERED:
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case RPC_PMAPFAILURE:
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case RPC_UNKNOWNPROTO:
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case RPC_UNKNOWNHOST:
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case RPC_SYSTEMERROR:
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case RPC_CANTDECODEARGS:
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case RPC_PROCUNAVAIL:
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case RPC_PROGUNAVAIL:
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case RPC_TIMEDOUT:
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case RPC_CANTRECV:
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case RPC_CANTSEND:
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case RPC_CANTDECODERES:
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case RPC_CANTENCODEARGS:
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default:
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break;
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}
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return (stat);
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}
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