2 * Copyright (c) 2009, Sun Microsystems, Inc.
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28 * @(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro
29 * @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC
30 * $NetBSD: rpc_prot.c,v 1.16 2000/06/02 23:11:13 fvdl Exp $
31 * $FreeBSD: src/lib/libc/rpc/rpc_prot.c,v 1.13 2007/11/20 01:51:20 jb Exp $
32 * $DragonFly: src/lib/libc/rpc/rpc_prot.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
38 * Copyright (C) 1984, Sun Microsystems, Inc.
40 * This set of routines implements the rpc message definition,
41 * its serializer and some common rpc utility routines.
42 * The routines are meant for various implementations of rpc -
43 * they are NOT for the rpc client or rpc service implementations!
44 * Because authentication stuff is easy and is part of rpc, the opaque
45 * routines are also in this program.
48 #include "namespace.h"
49 #include <sys/param.h>
54 #include "un-namespace.h"
56 static void accepted(enum accept_stat, struct rpc_err *);
57 static void rejected(enum reject_stat, struct rpc_err *);
59 /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
61 extern struct opaque_auth _null_auth;
64 * XDR an opaque authentication struct
68 xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap)
74 if (xdr_enum(xdrs, &(ap->oa_flavor)))
75 return (xdr_bytes(xdrs, &ap->oa_base,
76 &ap->oa_length, MAX_AUTH_BYTES));
84 xdr_des_block(XDR *xdrs, des_block *blkp)
90 return (xdr_opaque(xdrs, (caddr_t)(void *)blkp, sizeof(des_block)));
93 /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
96 * XDR the MSG_ACCEPTED part of a reply message union
99 xdr_accepted_reply(XDR *xdrs, struct accepted_reply *ar)
101 enum accept_stat *par_stat;
103 assert(xdrs != NULL);
106 par_stat = &ar->ar_stat;
108 /* personalized union, rather than calling xdr_union */
109 if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
111 if (! xdr_enum(xdrs, (enum_t *) par_stat))
113 switch (ar->ar_stat) {
116 return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where));
119 if (! xdr_u_int32_t(xdrs, &(ar->ar_vers.low)))
121 return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high)));
129 return (TRUE); /* TRUE => open ended set of problems */
133 * XDR the MSG_DENIED part of a reply message union
136 xdr_rejected_reply(XDR *xdrs, struct rejected_reply *rr)
138 enum reject_stat *prj_stat;
139 enum auth_stat *prj_why;
141 assert(xdrs != NULL);
144 prj_stat = &rr->rj_stat;
146 /* personalized union, rather than calling xdr_union */
147 if (! xdr_enum(xdrs, (enum_t *) prj_stat))
149 switch (rr->rj_stat) {
152 if (! xdr_u_int32_t(xdrs, &(rr->rj_vers.low)))
154 return (xdr_u_int32_t(xdrs, &(rr->rj_vers.high)));
157 prj_why = &rr->rj_why;
158 return (xdr_enum(xdrs, (enum_t *) prj_why));
165 static const struct xdr_discrim reply_dscrm[3] = {
166 { (int)MSG_ACCEPTED, (xdrproc_t)xdr_accepted_reply },
167 { (int)MSG_DENIED, (xdrproc_t)xdr_rejected_reply },
168 { __dontcare__, NULL_xdrproc_t } };
171 * XDR a reply message
174 xdr_replymsg(XDR *xdrs, struct rpc_msg *rmsg)
176 enum msg_type *prm_direction;
177 enum reply_stat *prp_stat;
179 assert(xdrs != NULL);
180 assert(rmsg != NULL);
182 prm_direction = &rmsg->rm_direction;
183 prp_stat = &rmsg->rm_reply.rp_stat;
186 xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) &&
187 xdr_enum(xdrs, (enum_t *) prm_direction) &&
188 (rmsg->rm_direction == REPLY) )
189 return (xdr_union(xdrs, (enum_t *) prp_stat,
190 (caddr_t)(void *)&(rmsg->rm_reply.ru), reply_dscrm,
197 * Serializes the "static part" of a call message header.
198 * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
199 * The rm_xid is not really static, but the user can easily munge on the fly.
202 xdr_callhdr(XDR *xdrs, struct rpc_msg *cmsg)
204 enum msg_type *prm_direction;
206 assert(xdrs != NULL);
207 assert(cmsg != NULL);
209 prm_direction = &cmsg->rm_direction;
211 cmsg->rm_direction = CALL;
212 cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
214 (xdrs->x_op == XDR_ENCODE) &&
215 xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
216 xdr_enum(xdrs, (enum_t *) prm_direction) &&
217 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
218 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) )
219 return (xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)));
223 /* ************************** Client utility routine ************* */
226 accepted(enum accept_stat acpt_stat, struct rpc_err *error)
229 assert(error != NULL);
234 error->re_status = RPC_PROGUNAVAIL;
238 error->re_status = RPC_PROGVERSMISMATCH;
242 error->re_status = RPC_PROCUNAVAIL;
246 error->re_status = RPC_CANTDECODEARGS;
250 error->re_status = RPC_SYSTEMERROR;
254 error->re_status = RPC_SUCCESS;
258 /* something's wrong, but we don't know what ... */
259 error->re_status = RPC_FAILED;
260 error->re_lb.s1 = (int32_t)MSG_ACCEPTED;
261 error->re_lb.s2 = (int32_t)acpt_stat;
265 rejected(enum reject_stat rjct_stat, struct rpc_err *error)
268 assert(error != NULL);
272 error->re_status = RPC_VERSMISMATCH;
276 error->re_status = RPC_AUTHERROR;
279 /* something's wrong, but we don't know what ... */
281 error->re_status = RPC_FAILED;
282 error->re_lb.s1 = (int32_t)MSG_DENIED;
283 error->re_lb.s2 = (int32_t)rjct_stat;
287 * given a reply message, fills in the error
290 _seterr_reply(struct rpc_msg *msg, struct rpc_err *error)
294 assert(error != NULL);
296 /* optimized for normal, SUCCESSful case */
297 switch (msg->rm_reply.rp_stat) {
300 if (msg->acpted_rply.ar_stat == SUCCESS) {
301 error->re_status = RPC_SUCCESS;
304 accepted(msg->acpted_rply.ar_stat, error);
308 rejected(msg->rjcted_rply.rj_stat, error);
312 error->re_status = RPC_FAILED;
313 error->re_lb.s1 = (int32_t)(msg->rm_reply.rp_stat);
316 switch (error->re_status) {
318 case RPC_VERSMISMATCH:
319 error->re_vers.low = msg->rjcted_rply.rj_vers.low;
320 error->re_vers.high = msg->rjcted_rply.rj_vers.high;
324 error->re_why = msg->rjcted_rply.rj_why;
327 case RPC_PROGVERSMISMATCH:
328 error->re_vers.low = msg->acpted_rply.ar_vers.low;
329 error->re_vers.high = msg->acpted_rply.ar_vers.high;
334 case RPC_PROGNOTREGISTERED:
335 case RPC_PMAPFAILURE:
336 case RPC_UNKNOWNPROTO:
337 case RPC_UNKNOWNHOST:
338 case RPC_SYSTEMERROR:
339 case RPC_CANTDECODEARGS:
340 case RPC_PROCUNAVAIL:
341 case RPC_PROGUNAVAIL:
345 case RPC_CANTDECODERES:
346 case RPC_CANTENCODEARGS: