1 /* $NetBSD: rpc_prot.c,v 1.16 2000/06/02 23:11:13 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char *sccsid2 = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro"; 33 static char *sccsid = "@(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC"; 34 #endif 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 /* 39 * rpc_prot.c 40 * 41 * Copyright (C) 1984, Sun Microsystems, Inc. 42 * 43 * This set of routines implements the rpc message definition, 44 * its serializer and some common rpc utility routines. 45 * The routines are meant for various implementations of rpc - 46 * they are NOT for the rpc client or rpc service implementations! 47 * Because authentication stuff is easy and is part of rpc, the opaque 48 * routines are also in this program. 49 */ 50 51 #include "namespace.h" 52 #include <sys/param.h> 53 54 #include <assert.h> 55 56 #include <rpc/rpc.h> 57 #include "un-namespace.h" 58 59 static void accepted(enum accept_stat, struct rpc_err *); 60 static void rejected(enum reject_stat, struct rpc_err *); 61 62 /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ 63 64 extern struct opaque_auth _null_auth; 65 66 /* 67 * XDR an opaque authentication struct 68 * (see auth.h) 69 */ 70 bool_t 71 xdr_opaque_auth(xdrs, ap) 72 XDR *xdrs; 73 struct opaque_auth *ap; 74 { 75 76 assert(xdrs != NULL); 77 assert(ap != NULL); 78 79 if (xdr_enum(xdrs, &(ap->oa_flavor))) 80 return (xdr_bytes(xdrs, &ap->oa_base, 81 &ap->oa_length, MAX_AUTH_BYTES)); 82 return (FALSE); 83 } 84 85 /* 86 * XDR a DES block 87 */ 88 bool_t 89 xdr_des_block(xdrs, blkp) 90 XDR *xdrs; 91 des_block *blkp; 92 { 93 94 assert(xdrs != NULL); 95 assert(blkp != NULL); 96 97 return (xdr_opaque(xdrs, (caddr_t)(void *)blkp, sizeof(des_block))); 98 } 99 100 /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ 101 102 /* 103 * XDR the MSG_ACCEPTED part of a reply message union 104 */ 105 bool_t 106 xdr_accepted_reply(xdrs, ar) 107 XDR *xdrs; 108 struct accepted_reply *ar; 109 { 110 enum accept_stat *par_stat; 111 112 assert(xdrs != NULL); 113 assert(ar != NULL); 114 115 par_stat = &ar->ar_stat; 116 117 /* personalized union, rather than calling xdr_union */ 118 if (! xdr_opaque_auth(xdrs, &(ar->ar_verf))) 119 return (FALSE); 120 if (! xdr_enum(xdrs, (enum_t *) par_stat)) 121 return (FALSE); 122 switch (ar->ar_stat) { 123 124 case SUCCESS: 125 return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where)); 126 127 case PROG_MISMATCH: 128 if (! xdr_u_int32_t(xdrs, &(ar->ar_vers.low))) 129 return (FALSE); 130 return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high))); 131 132 case GARBAGE_ARGS: 133 case SYSTEM_ERR: 134 case PROC_UNAVAIL: 135 case PROG_UNAVAIL: 136 break; 137 } 138 return (TRUE); /* TRUE => open ended set of problems */ 139 } 140 141 /* 142 * XDR the MSG_DENIED part of a reply message union 143 */ 144 bool_t 145 xdr_rejected_reply(xdrs, rr) 146 XDR *xdrs; 147 struct rejected_reply *rr; 148 { 149 enum reject_stat *prj_stat; 150 enum auth_stat *prj_why; 151 152 assert(xdrs != NULL); 153 assert(rr != NULL); 154 155 prj_stat = &rr->rj_stat; 156 157 /* personalized union, rather than calling xdr_union */ 158 if (! xdr_enum(xdrs, (enum_t *) prj_stat)) 159 return (FALSE); 160 switch (rr->rj_stat) { 161 162 case RPC_MISMATCH: 163 if (! xdr_u_int32_t(xdrs, &(rr->rj_vers.low))) 164 return (FALSE); 165 return (xdr_u_int32_t(xdrs, &(rr->rj_vers.high))); 166 167 case AUTH_ERROR: 168 prj_why = &rr->rj_why; 169 return (xdr_enum(xdrs, (enum_t *) prj_why)); 170 } 171 /* NOTREACHED */ 172 assert(0); 173 return (FALSE); 174 } 175 176 static const struct xdr_discrim reply_dscrm[3] = { 177 { (int)MSG_ACCEPTED, (xdrproc_t)xdr_accepted_reply }, 178 { (int)MSG_DENIED, (xdrproc_t)xdr_rejected_reply }, 179 { __dontcare__, NULL_xdrproc_t } }; 180 181 /* 182 * XDR a reply message 183 */ 184 bool_t 185 xdr_replymsg(xdrs, rmsg) 186 XDR *xdrs; 187 struct rpc_msg *rmsg; 188 { 189 enum msg_type *prm_direction; 190 enum reply_stat *prp_stat; 191 192 assert(xdrs != NULL); 193 assert(rmsg != NULL); 194 195 prm_direction = &rmsg->rm_direction; 196 prp_stat = &rmsg->rm_reply.rp_stat; 197 198 if ( 199 xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) && 200 xdr_enum(xdrs, (enum_t *) prm_direction) && 201 (rmsg->rm_direction == REPLY) ) 202 return (xdr_union(xdrs, (enum_t *) prp_stat, 203 (caddr_t)(void *)&(rmsg->rm_reply.ru), reply_dscrm, 204 NULL_xdrproc_t)); 205 return (FALSE); 206 } 207 208 209 /* 210 * Serializes the "static part" of a call message header. 211 * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers. 212 * The rm_xid is not really static, but the user can easily munge on the fly. 213 */ 214 bool_t 215 xdr_callhdr(xdrs, cmsg) 216 XDR *xdrs; 217 struct rpc_msg *cmsg; 218 { 219 enum msg_type *prm_direction; 220 221 assert(xdrs != NULL); 222 assert(cmsg != NULL); 223 224 prm_direction = &cmsg->rm_direction; 225 226 cmsg->rm_direction = CALL; 227 cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; 228 if ( 229 (xdrs->x_op == XDR_ENCODE) && 230 xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) && 231 xdr_enum(xdrs, (enum_t *) prm_direction) && 232 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) && 233 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) ) 234 return (xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers))); 235 return (FALSE); 236 } 237 238 /* ************************** Client utility routine ************* */ 239 240 static void 241 accepted(acpt_stat, error) 242 enum accept_stat acpt_stat; 243 struct rpc_err *error; 244 { 245 246 assert(error != NULL); 247 248 switch (acpt_stat) { 249 250 case PROG_UNAVAIL: 251 error->re_status = RPC_PROGUNAVAIL; 252 return; 253 254 case PROG_MISMATCH: 255 error->re_status = RPC_PROGVERSMISMATCH; 256 return; 257 258 case PROC_UNAVAIL: 259 error->re_status = RPC_PROCUNAVAIL; 260 return; 261 262 case GARBAGE_ARGS: 263 error->re_status = RPC_CANTDECODEARGS; 264 return; 265 266 case SYSTEM_ERR: 267 error->re_status = RPC_SYSTEMERROR; 268 return; 269 270 case SUCCESS: 271 error->re_status = RPC_SUCCESS; 272 return; 273 } 274 /* NOTREACHED */ 275 /* something's wrong, but we don't know what ... */ 276 error->re_status = RPC_FAILED; 277 error->re_lb.s1 = (int32_t)MSG_ACCEPTED; 278 error->re_lb.s2 = (int32_t)acpt_stat; 279 } 280 281 static void 282 rejected(rjct_stat, error) 283 enum reject_stat rjct_stat; 284 struct rpc_err *error; 285 { 286 287 assert(error != NULL); 288 289 switch (rjct_stat) { 290 case RPC_MISMATCH: 291 error->re_status = RPC_VERSMISMATCH; 292 return; 293 294 case AUTH_ERROR: 295 error->re_status = RPC_AUTHERROR; 296 return; 297 } 298 /* something's wrong, but we don't know what ... */ 299 /* NOTREACHED */ 300 error->re_status = RPC_FAILED; 301 error->re_lb.s1 = (int32_t)MSG_DENIED; 302 error->re_lb.s2 = (int32_t)rjct_stat; 303 } 304 305 /* 306 * given a reply message, fills in the error 307 */ 308 void 309 _seterr_reply(msg, error) 310 struct rpc_msg *msg; 311 struct rpc_err *error; 312 { 313 314 assert(msg != NULL); 315 assert(error != NULL); 316 317 /* optimized for normal, SUCCESSful case */ 318 switch (msg->rm_reply.rp_stat) { 319 320 case MSG_ACCEPTED: 321 if (msg->acpted_rply.ar_stat == SUCCESS) { 322 error->re_status = RPC_SUCCESS; 323 return; 324 } 325 accepted(msg->acpted_rply.ar_stat, error); 326 break; 327 328 case MSG_DENIED: 329 rejected(msg->rjcted_rply.rj_stat, error); 330 break; 331 332 default: 333 error->re_status = RPC_FAILED; 334 error->re_lb.s1 = (int32_t)(msg->rm_reply.rp_stat); 335 break; 336 } 337 switch (error->re_status) { 338 339 case RPC_VERSMISMATCH: 340 error->re_vers.low = msg->rjcted_rply.rj_vers.low; 341 error->re_vers.high = msg->rjcted_rply.rj_vers.high; 342 break; 343 344 case RPC_AUTHERROR: 345 error->re_why = msg->rjcted_rply.rj_why; 346 break; 347 348 case RPC_PROGVERSMISMATCH: 349 error->re_vers.low = msg->acpted_rply.ar_vers.low; 350 error->re_vers.high = msg->acpted_rply.ar_vers.high; 351 break; 352 353 case RPC_FAILED: 354 case RPC_SUCCESS: 355 case RPC_PROGNOTREGISTERED: 356 case RPC_PMAPFAILURE: 357 case RPC_UNKNOWNPROTO: 358 case RPC_UNKNOWNHOST: 359 case RPC_SYSTEMERROR: 360 case RPC_CANTDECODEARGS: 361 case RPC_PROCUNAVAIL: 362 case RPC_PROGUNAVAIL: 363 case RPC_TIMEDOUT: 364 case RPC_CANTRECV: 365 case RPC_CANTSEND: 366 case RPC_CANTDECODERES: 367 case RPC_CANTENCODEARGS: 368 default: 369 break; 370 } 371 } 372