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1.1 root 1: /*
2: * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3: * unrestricted use provided that this legend is included on all tape
4: * media and as a part of the software program in whole or part. Users
5: * may copy or modify Sun RPC without charge, but are not authorized
6: * to license or distribute it to anyone else except as part of a product or
7: * program developed by the user.
8: *
9: * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10: * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11: * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12: *
13: * Sun RPC is provided with no support and without any obligation on the
14: * part of Sun Microsystems, Inc. to assist in its use, correction,
15: * modification or enhancement.
16: *
17: * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18: * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19: * OR ANY PART THEREOF.
20: *
21: * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22: * or profits or other special, indirect and consequential damages, even if
23: * Sun has been advised of the possibility of such damages.
24: *
25: * Sun Microsystems, Inc.
26: * 2550 Garcia Avenue
27: * Mountain View, California 94043
28: */
29: #ifndef lint
30: static char sccsid[] = "@(#)rpc_prot.c 1.5 85/03/20 Copyr 1984 Sun Micro";
31: #endif
32:
33: /*
34: * rpc_prot.c
35: *
36: * Copyright (C) 1984, Sun Microsystems, Inc.
37: *
38: * This set of routines implements the rpc message definition,
39: * its serializer and some common rpc utility routines.
40: * The routines are meant for various implementations of rpc -
41: * they are NOT for the rpc client or rpc service implementations!
42: * Because authentication stuff is easy and is part of rpc, the opaque
43: * routines are also in this program.
44: */
45:
46: #include "types.h"
47: #include "xdr.h"
48: #include "auth.h"
49: #include "clnt.h"
50: #include "rpc_msg.h"
51:
52: /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
53:
54: struct opaque_auth _null_auth;
55:
56: /*
57: * XDR an opaque authentication struct
58: * (see auth.h)
59: */
60: bool_t
61: xdr_opaque_auth(xdrs, ap)
62: register XDR *xdrs;
63: register struct opaque_auth *ap;
64: {
65:
66: if (xdr_enum(xdrs, &(ap->oa_flavor)))
67: return (xdr_bytes(xdrs, &ap->oa_base,
68: &ap->oa_length, MAX_AUTH_BYTES));
69: return (FALSE);
70: }
71:
72: /*
73: * XDR a DES key.
74: */
75: bool_t
76: xdr_deskey(xdrs, blkp)
77: register XDR *xdrs;
78: register union des_block *blkp;
79: {
80:
81: if (! xdr_u_long(xdrs, &(blkp->key.high)))
82: return (FALSE);
83: return (xdr_u_long(xdrs, &(blkp->key.low)));
84: }
85:
86: /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
87:
88: /*
89: * XDR the MSG_ACCEPTED part of a reply message union
90: */
91: bool_t
92: xdr_accepted_reply(xdrs, ar)
93: register XDR *xdrs;
94: register struct accepted_reply *ar;
95: {
96:
97: /* personalized union, rather than calling xdr_union */
98: if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
99: return (FALSE);
100: if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat)))
101: return (FALSE);
102: switch (ar->ar_stat) {
103:
104: case SUCCESS:
105: return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where));
106:
107: case PROG_MISMATCH:
108: if (! xdr_u_long(xdrs, &(ar->ar_vers.low)))
109: return (FALSE);
110: return (xdr_u_long(xdrs, &(ar->ar_vers.high)));
111: }
112: return (TRUE); /* TRUE => open ended set of problems */
113: }
114:
115: /*
116: * XDR the MSG_DENIED part of a reply message union
117: */
118: bool_t
119: xdr_rejected_reply(xdrs, rr)
120: register XDR *xdrs;
121: register struct rejected_reply *rr;
122: {
123:
124: /* personalized union, rather than calling xdr_union */
125: if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat)))
126: return (FALSE);
127: switch (rr->rj_stat) {
128:
129: case RPC_MISMATCH:
130: if (! xdr_u_long(xdrs, &(rr->rj_vers.low)))
131: return (FALSE);
132: return (xdr_u_long(xdrs, &(rr->rj_vers.high)));
133:
134: case AUTH_ERROR:
135: return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why)));
136: }
137: return (FALSE);
138: }
139:
140: static struct xdr_discrim reply_dscrm[3] = {
141: { (int)MSG_ACCEPTED, xdr_accepted_reply },
142: { (int)MSG_DENIED, xdr_rejected_reply },
143: { __dontcare__, NULL_xdrproc_t } };
144:
145: /*
146: * XDR a reply message
147: */
148: bool_t
149: xdr_replymsg(xdrs, rmsg)
150: register XDR *xdrs;
151: register struct rpc_msg *rmsg;
152: {
153:
154: if (
155: xdr_u_long(xdrs, &(rmsg->rm_xid)) &&
156: xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) &&
157: (rmsg->rm_direction == REPLY) )
158: return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat),
159: (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t));
160: return (FALSE);
161: }
162:
163: /*
164: * XDR a call message
165: */
166: bool_t
167: xdr_callmsg(xdrs, cmsg)
168: register XDR *xdrs;
169: register struct rpc_msg *cmsg;
170: {
171:
172: if (
173: xdr_u_long(xdrs, &(cmsg->rm_xid)) &&
174: xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
175: (cmsg->rm_direction == CALL) &&
176: xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
177: (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
178: xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) &&
179: xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers)) &&
180: xdr_u_long(xdrs, &(cmsg->rm_call.cb_proc)) &&
181: xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
182: return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
183: return (FALSE);
184: }
185:
186: /*
187: * Serializes the "static part" of a call message header.
188: * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
189: * The rm_xid is not really static, but the user can easily munge on the fly.
190: */
191: bool_t
192: xdr_callhdr(xdrs, cmsg)
193: register XDR *xdrs;
194: register struct rpc_msg *cmsg;
195: {
196:
197: cmsg->rm_direction = CALL;
198: cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
199: if (
200: (xdrs->x_op == XDR_ENCODE) &&
201: xdr_u_long(xdrs, &(cmsg->rm_xid)) &&
202: xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
203: xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
204: xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) )
205: return (xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers)));
206: return (FALSE);
207: }
208:
209: /* ************************** Client utility routine ************* */
210:
211: static void
212: accepted(acpt_stat, error)
213: register enum accept_stat acpt_stat;
214: register struct rpc_err *error;
215: {
216:
217: switch (acpt_stat) {
218:
219: case PROG_UNAVAIL:
220: error->re_status = RPC_PROGUNAVAIL;
221: return;
222:
223: case PROG_MISMATCH:
224: error->re_status = RPC_PROGVERSMISMATCH;
225: return;
226:
227: case PROC_UNAVAIL:
228: error->re_status = RPC_PROCUNAVAIL;
229: return;
230:
231: case GARBAGE_ARGS:
232: error->re_status = RPC_CANTDECODEARGS;
233: return;
234:
235: case SYSTEM_ERR:
236: error->re_status = RPC_SYSTEMERROR;
237: return;
238:
239: case SUCCESS:
240: error->re_status = RPC_SUCCESS;
241: return;
242: }
243: /* something's wrong, but we don't know what ... */
244: error->re_status = RPC_FAILED;
245: error->re_lb.s1 = (long)MSG_ACCEPTED;
246: error->re_lb.s2 = (long)acpt_stat;
247: }
248:
249: static void
250: rejected(rjct_stat, error)
251: register enum reject_stat rjct_stat;
252: register struct rpc_err *error;
253: {
254:
255: switch (rjct_stat) {
256:
257: case RPC_VERSMISMATCH:
258: error->re_status = RPC_VERSMISMATCH;
259: return;
260:
261: case AUTH_ERROR:
262: error->re_status = RPC_AUTHERROR;
263: return;
264: }
265: /* something's wrong, but we don't know what ... */
266: error->re_status = RPC_FAILED;
267: error->re_lb.s1 = (long)MSG_DENIED;
268: error->re_lb.s2 = (long)rjct_stat;
269: }
270:
271: /*
272: * given a reply message, fills in the error
273: */
274: void
275: _seterr_reply(msg, error)
276: register struct rpc_msg *msg;
277: register struct rpc_err *error;
278: {
279:
280: /* optimized for normal, SUCCESSful case */
281: switch (msg->rm_reply.rp_stat) {
282:
283: case MSG_ACCEPTED:
284: if (msg->acpted_rply.ar_stat == SUCCESS) {
285: error->re_status = RPC_SUCCESS;
286: return;
287: };
288: accepted(msg->acpted_rply.ar_stat, error);
289: break;
290:
291: case MSG_DENIED:
292: rejected(msg->rjcted_rply.rj_stat, error);
293: break;
294:
295: default:
296: error->re_status = RPC_FAILED;
297: error->re_lb.s1 = (long)(msg->rm_reply.rp_stat);
298: break;
299: }
300: switch (error->re_status) {
301:
302: case RPC_VERSMISMATCH:
303: error->re_vers.low = msg->rjcted_rply.rj_vers.low;
304: error->re_vers.high = msg->rjcted_rply.rj_vers.high;
305: break;
306:
307: case RPC_AUTHERROR:
308: error->re_why = msg->rjcted_rply.rj_why;
309: break;
310:
311: case RPC_PROGVERSMISMATCH:
312: error->re_vers.low = msg->acpted_rply.ar_vers.low;
313: error->re_vers.high = msg->acpted_rply.ar_vers.high;
314: break;
315: }
316: }
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