260 lines
6.8 KiB
C
260 lines
6.8 KiB
C
/* @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";
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#endif
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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 <rpc/rpc.h>
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/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
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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 xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap)
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{
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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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/*
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* XDR a DES block
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*/
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bool_t xdr_des_block(XDR *xdrs, des_block *blkp)
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{
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return (xdr_opaque(xdrs, (char*) blkp, sizeof(des_block)));
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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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static bool_t xdr_accepted_reply(XDR *xdrs, struct accepted_reply *ar)
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{
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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 *) & (ar->ar_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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return ((*(ar->ar_results.proc)) (xdrs, ar->ar_results.where));
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case PROG_MISMATCH:
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if (!xdr_u_long(xdrs, &(ar->ar_vers.low)))
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return (FALSE);
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return (xdr_u_long(xdrs, &(ar->ar_vers.high)));
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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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static bool_t xdr_rejected_reply(XDR *xdrs, struct rejected_reply *rr)
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{
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/* personalized union, rather than calling xdr_union */
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if (!xdr_enum(xdrs, (enum_t *) & (rr->rj_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_u_long(xdrs, &(rr->rj_vers.low)))
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return (FALSE);
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return (xdr_u_long(xdrs, &(rr->rj_vers.high)));
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case AUTH_ERROR:
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return (xdr_enum(xdrs, (enum_t *) & (rr->rj_why)));
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}
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return (FALSE);
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}
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static 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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/*
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* XDR a reply message
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*/
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bool_t xdr_replymsg(XDR *xdrs, struct rpc_msg *rmsg)
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{
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if (xdr_u_long(xdrs, &(rmsg->rm_xid)) &&
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xdr_enum(xdrs, (enum_t *) & (rmsg->rm_direction)) &&
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(rmsg->rm_direction == REPLY))
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return (xdr_union(xdrs, (enum_t *) & (rmsg->rm_reply.rp_stat),
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(char*) & (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 xdr_callhdr(XDR *xdrs, struct rpc_msg *cmsg)
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{
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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_u_long(xdrs, &(cmsg->rm_xid)) &&
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xdr_enum(xdrs, (enum_t *) & (cmsg->rm_direction)) &&
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xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
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xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)))
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return (xdr_u_long(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 void accepted(enum accept_stat acpt_stat, struct rpc_err *error)
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{
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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;
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case PROG_MISMATCH:
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error->re_status = RPC_PROGVERSMISMATCH;
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return;
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case PROC_UNAVAIL:
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error->re_status = RPC_PROCUNAVAIL;
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return;
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case GARBAGE_ARGS:
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error->re_status = RPC_CANTDECODEARGS;
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return;
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case SYSTEM_ERR:
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error->re_status = RPC_SYSTEMERROR;
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return;
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case SUCCESS:
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error->re_status = RPC_SUCCESS;
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return;
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}
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/* something's wrong, but we don't know what ... */
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) MSG_ACCEPTED;
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error->re_lb.s2 = (long) acpt_stat;
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}
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static void rejected(enum reject_stat rjct_stat, struct rpc_err *error)
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{
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switch (rjct_stat) {
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case RPC_VERSMISMATCH:
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error->re_status = RPC_VERSMISMATCH;
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return;
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case AUTH_ERROR:
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error->re_status = RPC_AUTHERROR;
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return;
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}
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/* something's wrong, but we don't know what ... */
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) MSG_DENIED;
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error->re_lb.s2 = (long) rjct_stat;
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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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void _seterr_reply(struct rpc_msg *msg, struct rpc_err *error)
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{
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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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error->re_status = RPC_SUCCESS;
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return;
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};
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accepted((enum accept_stat)msg->acpted_rply.ar_stat, error);
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break;
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case MSG_DENIED:
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rejected((enum reject_stat)msg->rjcted_rply.rj_stat, error);
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break;
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default:
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) (msg->rm_reply.rp_stat);
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break;
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}
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switch (error->re_status) {
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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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}
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}
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