1 /* @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC */
3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
4 * unrestricted use provided that this legend is included on all tape
5 * media and as a part of the software program in whole or part. Users
6 * may copy or modify Sun RPC without charge, but are not authorized
7 * to license or distribute it to anyone else except as part of a product or
8 * program developed by the user.
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
26 * Sun Microsystems, Inc.
28 * Mountain View, California 94043
31 static char sccsid[] = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";
37 * Copyright (C) 1984, Sun Microsystems, Inc.
39 * This set of routines implements the rpc message definition,
40 * its serializer and some common rpc utility routines.
41 * The routines are meant for various implementations of rpc -
42 * they are NOT for the rpc client or rpc service implementations!
43 * Because authentication stuff is easy and is part of rpc, the opaque
44 * routines are also in this program.
47 #include <sys/param.h>
52 /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
55 * XDR an opaque authentication struct
59 xdr_opaque_auth (XDR *xdrs, struct opaque_auth *ap)
62 if (xdr_enum (xdrs, &(ap->oa_flavor)))
63 return xdr_bytes (xdrs, &ap->oa_base,
64 &ap->oa_length, MAX_AUTH_BYTES);
67 libc_hidden_def(xdr_opaque_auth)
73 xdr_des_block (XDR *xdrs, des_block *blkp)
75 return xdr_opaque (xdrs, (caddr_t) blkp, sizeof (des_block));
78 /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
81 * XDR the MSG_ACCEPTED part of a reply message union
84 xdr_accepted_reply (XDR *xdrs, struct accepted_reply *ar)
86 /* personalized union, rather than calling xdr_union */
87 if (!xdr_opaque_auth (xdrs, &(ar->ar_verf)))
89 if (!xdr_enum (xdrs, (enum_t *) & (ar->ar_stat)))
94 return ((*(ar->ar_results.proc)) (xdrs, ar->ar_results.where));
96 if (!xdr_u_long (xdrs, &(ar->ar_vers.low)))
98 return (xdr_u_long (xdrs, &(ar->ar_vers.high)));
102 return TRUE; /* TRUE => open ended set of problems */
104 libc_hidden_def(xdr_accepted_reply)
107 * XDR the MSG_DENIED part of a reply message union
110 xdr_rejected_reply (XDR *xdrs, struct rejected_reply *rr)
112 /* personalized union, rather than calling xdr_union */
113 if (!xdr_enum (xdrs, (enum_t *) & (rr->rj_stat)))
118 if (!xdr_u_long (xdrs, &(rr->rj_vers.low)))
120 return xdr_u_long (xdrs, &(rr->rj_vers.high));
123 return xdr_enum (xdrs, (enum_t *) & (rr->rj_why));
127 libc_hidden_def(xdr_rejected_reply)
129 static const struct xdr_discrim reply_dscrm[3] =
131 {(int) MSG_ACCEPTED, (xdrproc_t) xdr_accepted_reply},
132 {(int) MSG_DENIED, (xdrproc_t) xdr_rejected_reply},
133 {__dontcare__, NULL_xdrproc_t}};
136 * XDR a reply message
139 xdr_replymsg (XDR *xdrs, struct rpc_msg *rmsg)
141 if (xdr_u_long (xdrs, &(rmsg->rm_xid)) &&
142 xdr_enum (xdrs, (enum_t *) & (rmsg->rm_direction)) &&
143 (rmsg->rm_direction == REPLY))
144 return xdr_union (xdrs, (enum_t *) & (rmsg->rm_reply.rp_stat),
145 (caddr_t) & (rmsg->rm_reply.ru), reply_dscrm,
149 libc_hidden_def(xdr_replymsg)
153 * Serializes the "static part" of a call message header.
154 * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
155 * The rm_xid is not really static, but the user can easily munge on the fly.
158 xdr_callhdr (XDR *xdrs, struct rpc_msg *cmsg)
161 cmsg->rm_direction = CALL;
162 cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
164 (xdrs->x_op == XDR_ENCODE) &&
165 xdr_u_long (xdrs, &(cmsg->rm_xid)) &&
166 xdr_enum (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
167 xdr_u_long (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
168 xdr_u_long (xdrs, &(cmsg->rm_call.cb_prog)))
169 return xdr_u_long (xdrs, &(cmsg->rm_call.cb_vers));
172 libc_hidden_def(xdr_callhdr)
174 /* ************************** Client utility routine ************* */
177 accepted (enum accept_stat acpt_stat,
178 struct rpc_err *error)
184 error->re_status = RPC_PROGUNAVAIL;
188 error->re_status = RPC_PROGVERSMISMATCH;
192 error->re_status = RPC_PROCUNAVAIL;
196 error->re_status = RPC_CANTDECODEARGS;
200 error->re_status = RPC_SYSTEMERROR;
204 error->re_status = RPC_SUCCESS;
207 /* something's wrong, but we don't know what ... */
208 error->re_status = RPC_FAILED;
209 error->re_lb.s1 = (long) MSG_ACCEPTED;
210 error->re_lb.s2 = (long) acpt_stat;
214 rejected (enum reject_stat rjct_stat,
215 struct rpc_err *error)
220 error->re_status = RPC_VERSMISMATCH;
223 error->re_status = RPC_AUTHERROR;
226 /* something's wrong, but we don't know what ... */
227 error->re_status = RPC_FAILED;
228 error->re_lb.s1 = (long) MSG_DENIED;
229 error->re_lb.s2 = (long) rjct_stat;
235 * given a reply message, fills in the error
238 _seterr_reply (struct rpc_msg *msg,
239 struct rpc_err *error)
241 /* optimized for normal, SUCCESSful case */
242 switch (msg->rm_reply.rp_stat)
245 if (msg->acpted_rply.ar_stat == SUCCESS)
247 error->re_status = RPC_SUCCESS;
250 accepted (msg->acpted_rply.ar_stat, error);
254 rejected (msg->rjcted_rply.rj_stat, error);
258 error->re_status = RPC_FAILED;
259 error->re_lb.s1 = (long) (msg->rm_reply.rp_stat);
262 switch (error->re_status)
265 case RPC_VERSMISMATCH:
266 error->re_vers.low = msg->rjcted_rply.rj_vers.low;
267 error->re_vers.high = msg->rjcted_rply.rj_vers.high;
271 error->re_why = msg->rjcted_rply.rj_why;
274 case RPC_PROGVERSMISMATCH:
275 error->re_vers.low = msg->acpted_rply.ar_vers.low;
276 error->re_vers.high = msg->acpted_rply.ar_vers.high;
282 libc_hidden_def(_seterr_reply)