rpc_prot.c
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上传日期:2007-01-17
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- /* rpc_prot.c - the rpc message definition */
- /* Copyright 1984-2000 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * Copyright (c) 1987 Wind River Systems, Inc.
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * 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
- */
- /*
- modification history
- --------------------
- 01i,18apr00,ham fixed compilation warnings.
- 01h,20feb97,jank removed comment in comment L:37
- 01g,26may92,rrr the tree shuffle
- -changed includes to have absolute path from h/
- 01f,04oct91,rrr passed through the ansification filter
- -changed includes to have absolute path from h/
- -changed copyright notice
- 01e,21aug91,wmd removed redundant declaration of RNDUP.
- 01d,19apr90,hjb de-linted.
- 01c,27oct89,hjb upgraded to 4.0
- 01b,11nov87,jlf added wrs copyright, title, mod history, etc.
- 01a,01nov87,rdc first VxWorks version
- */
- #ifndef lint
- /* static char sccsid[] = "@(#)rpc_prot.c 1.1 86/02/03 Copyr 1984 Sun Micro"; */
- #endif
- /*
- * rpc_prot.c
- *
- *
- * This set of routines implements the rpc message definition,
- * its serializer and some common rpc utility routines.
- * The routines are meant for various implementations of rpc -
- * they are NOT for the rpc client or rpc service implementations!
- * Because authentication stuff is easy and is part of rpc, the opaque
- * routines are also in this program.
- */
- #include "rpc/rpctypes.h"
- #include "rpc/xdr.h"
- #include "rpc/auth.h"
- #include "rpc/clnt.h"
- #include "rpc/rpc_msg.h"
- #include "netinet/in.h"
- #include "vxWorks.h"
- /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
- /* struct opaque_auth _null_auth; now defined in rpc_commondata.c - 4.0 */
- /*
- * XDR an opaque authentication struct
- * (see auth.h)
- */
- bool_t
- xdr_opaque_auth(xdrs, ap)
- register XDR *xdrs;
- register struct opaque_auth *ap;
- {
- if (xdr_enum(xdrs, &(ap->oa_flavor)))
- return (xdr_bytes(xdrs, &ap->oa_base,
- &ap->oa_length, MAX_AUTH_BYTES));
- return (FALSE);
- }
- /*
- * XDR a DES block
- */
- bool_t /* 4.0 */
- xdr_des_block (xdrs, blkp) /* 4.0 */
- register XDR *xdrs;
- register union des_block *blkp;
- { /* 4.0 */
- return (xdr_opaque (xdrs, (caddr_t) blkp, sizeof (des_block))); /* 4.0 */
- } /* 4.0 */
- /*
- * XDR a DES key.
- */
- bool_t
- xdr_deskey(xdrs, blkp)
- register XDR *xdrs;
- register union des_block *blkp;
- {
- if (! xdr_u_long(xdrs, &(blkp->key.high)))
- return (FALSE);
- return (xdr_u_long(xdrs, &(blkp->key.low)));
- }
- /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
- /*
- * XDR the MSG_ACCEPTED part of a reply message union
- */
- bool_t
- xdr_accepted_reply(xdrs, ar)
- register XDR *xdrs;
- register struct accepted_reply *ar;
- {
- /* personalized union, rather than calling xdr_union */
- if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
- return (FALSE);
- if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat)))
- return (FALSE);
- switch (ar->ar_stat) {
- case SUCCESS:
- return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where));
- case PROG_MISMATCH:
- if (! xdr_u_long(xdrs, &(ar->ar_vers.low)))
- return (FALSE);
- return (xdr_u_long(xdrs, &(ar->ar_vers.high)));
- default:
- break;
- }
- return (TRUE); /* TRUE => open ended set of problems */
- }
- /*
- * XDR the MSG_DENIED part of a reply message union
- */
- bool_t
- xdr_rejected_reply(xdrs, rr)
- register XDR *xdrs;
- register struct rejected_reply *rr;
- {
- /* personalized union, rather than calling xdr_union */
- if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat)))
- return (FALSE);
- switch (rr->rj_stat) {
- case RPC_MISMATCH:
- if (! xdr_u_long(xdrs, &(rr->rj_vers.low)))
- return (FALSE);
- return (xdr_u_long(xdrs, &(rr->rj_vers.high)));
- case AUTH_ERROR:
- return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why)));
- }
- return (FALSE);
- }
- static struct xdr_discrim reply_dscrm[3] = {
- { (int)MSG_ACCEPTED, xdr_accepted_reply },
- { (int)MSG_DENIED, xdr_rejected_reply },
- { __dontcare__, NULL_xdrproc_t } };
- /*
- * XDR a reply message
- */
- bool_t
- xdr_replymsg(xdrs, rmsg)
- register XDR *xdrs;
- register struct rpc_msg *rmsg;
- {
- if (
- xdr_u_long(xdrs, &(rmsg->rm_xid)) &&
- xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) &&
- (rmsg->rm_direction == REPLY) )
- return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat),
- (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t));
- return (FALSE);
- }
- /* xdr_callmsg () is now in rpc_callmsg.c file. 4.0 */
- /*
- * Serializes the "static part" of a call message header.
- * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
- * The rm_xid is not really static, but the user can easily munge on the fly.
- */
- bool_t
- xdr_callhdr(xdrs, cmsg)
- register XDR *xdrs;
- register struct rpc_msg *cmsg;
- {
- cmsg->rm_direction = CALL;
- cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
- if (
- (xdrs->x_op == XDR_ENCODE) &&
- xdr_u_long(xdrs, &(cmsg->rm_xid)) &&
- xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
- xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
- xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) )
- return (xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers)));
- return (FALSE);
- }
- /* ************************** Client utility routine ************* */
- void
- accepted(acpt_stat, error)
- register enum accept_stat acpt_stat;
- register struct rpc_err *error;
- {
- switch (acpt_stat) {
- case PROG_UNAVAIL:
- error->re_status = RPC_PROGUNAVAIL;
- return;
- case PROG_MISMATCH:
- error->re_status = RPC_PROGVERSMISMATCH;
- return;
- case PROC_UNAVAIL:
- error->re_status = RPC_PROCUNAVAIL;
- return;
- case GARBAGE_ARGS:
- error->re_status = RPC_CANTDECODEARGS;
- return;
- case SYSTEM_ERR:
- error->re_status = RPC_SYSTEMERROR;
- return;
- case SUCCESS:
- error->re_status = RPC_SUCCESS;
- return;
- }
- /* something's wrong, but we don't know what ... */
- error->re_status = RPC_FAILED;
- error->re_lb.s1 = (long)MSG_ACCEPTED;
- error->re_lb.s2 = (long)acpt_stat;
- }
- void
- rejected(rjct_stat, error)
- register enum reject_stat rjct_stat;
- register struct rpc_err *error;
- {
- switch (rjct_stat) {
- case RPC_MISMATCH:
- error->re_status = RPC_VERSMISMATCH;
- return;
- case AUTH_ERROR:
- error->re_status = RPC_AUTHERROR;
- return;
- }
- /* something's wrong, but we don't know what ... */
- error->re_status = RPC_FAILED;
- error->re_lb.s1 = (long)MSG_DENIED;
- error->re_lb.s2 = (long)rjct_stat;
- }
- /*
- * given a reply message, fills in the error
- */
- void
- _seterr_reply(msg, error)
- register struct rpc_msg *msg;
- register struct rpc_err *error;
- {
- /* optimized for normal, SUCCESSful case */
- switch (msg->rm_reply.rp_stat) {
- case MSG_ACCEPTED:
- if (msg->acpted_rply.ar_stat == SUCCESS) {
- error->re_status = RPC_SUCCESS;
- return;
- };
- accepted(msg->acpted_rply.ar_stat, error);
- break;
- case MSG_DENIED:
- rejected(msg->rjcted_rply.rj_stat, error);
- break;
- default:
- error->re_status = RPC_FAILED;
- error->re_lb.s1 = (long)(msg->rm_reply.rp_stat);
- break;
- }
- switch (error->re_status) {
- case RPC_VERSMISMATCH:
- error->re_vers.low = msg->rjcted_rply.rj_vers.low;
- error->re_vers.high = msg->rjcted_rply.rj_vers.high;
- break;
- case RPC_AUTHERROR:
- error->re_why = msg->rjcted_rply.rj_why;
- break;
- case RPC_PROGVERSMISMATCH:
- error->re_vers.low = msg->acpted_rply.ar_vers.low;
- error->re_vers.high = msg->acpted_rply.ar_vers.high;
- break;
- default:
- break;
- }
- }