rpc_prot.c revision 22993
1229675Sadrian/* 2229675Sadrian * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3229675Sadrian * unrestricted use provided that this legend is included on all tape 4276486Sngie * media and as a part of the software program in whole or part. Users 5229675Sadrian * may copy or modify Sun RPC without charge, but are not authorized 6229675Sadrian * to license or distribute it to anyone else except as part of a product or 7229675Sadrian * program developed by the user. 8229675Sadrian * 9229675Sadrian * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10229675Sadrian * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11229675Sadrian * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12229675Sadrian * 13229675Sadrian * Sun RPC is provided with no support and without any obligation on the 14229675Sadrian * part of Sun Microsystems, Inc. to assist in its use, correction, 15229675Sadrian * modification or enhancement. 16229675Sadrian * 17229675Sadrian * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18229675Sadrian * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19229675Sadrian * OR ANY PART THEREOF. 20229675Sadrian * 21229675Sadrian * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22229675Sadrian * or profits or other special, indirect and consequential damages, even if 23229675Sadrian * Sun has been advised of the possibility of such damages. 24229675Sadrian * 25229675Sadrian * Sun Microsystems, Inc. 26229675Sadrian * 2550 Garcia Avenue 27229675Sadrian * Mountain View, California 94043 28229675Sadrian */ 29229675Sadrian 30229675Sadrian#if defined(LIBC_SCCS) && !defined(lint) 31229675Sadrian/*static char *sccsid = "from: @(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";*/ 32229675Sadrian/*static char *sccsid = "from: @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC";*/ 33229675Sadrianstatic char *rcsid = "$Id$"; 34229675Sadrian#endif 35229675Sadrian 36229675Sadrian/* 37229675Sadrian * rpc_prot.c 38229675Sadrian * 39229675Sadrian * Copyright (C) 1984, Sun Microsystems, Inc. 40229675Sadrian * 41229675Sadrian * This set of routines implements the rpc message definition, 42229675Sadrian * its serializer and some common rpc utility routines. 43229675Sadrian * The routines are meant for various implementations of rpc - 44229675Sadrian * they are NOT for the rpc client or rpc service implementations! 45229675Sadrian * Because authentication stuff is easy and is part of rpc, the opaque 46229675Sadrian * routines are also in this program. 47229675Sadrian */ 48229675Sadrian 49229675Sadrian#include <sys/param.h> 50229675Sadrian 51229675Sadrian#include <rpc/rpc.h> 52229675Sadrian 53229675Sadrian/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ 54229675Sadrian 55229675Sadrianstruct opaque_auth _null_auth; 56229675Sadrian 57229675Sadrian/* 58239885Sadrian * XDR an opaque authentication struct 59229675Sadrian * (see auth.h) 60229675Sadrian */ 61229675Sadrianbool_t 62229675Sadrianxdr_opaque_auth(xdrs, ap) 63229675Sadrian register XDR *xdrs; 64229675Sadrian register struct opaque_auth *ap; 65229675Sadrian{ 66229675Sadrian 67229675Sadrian if (xdr_enum(xdrs, &(ap->oa_flavor))) 68229675Sadrian return (xdr_bytes(xdrs, &ap->oa_base, 69229675Sadrian &ap->oa_length, MAX_AUTH_BYTES)); 70229675Sadrian return (FALSE); 71229675Sadrian} 72229675Sadrian 73229675Sadrian/* 74229675Sadrian * XDR a DES block 75229675Sadrian */ 76229675Sadrianbool_t 77229675Sadrianxdr_des_block(xdrs, blkp) 78229675Sadrian register XDR *xdrs; 79229675Sadrian register des_block *blkp; 80229675Sadrian{ 81229675Sadrian return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block))); 82229675Sadrian} 83229675Sadrian 84229675Sadrian/* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ 85229675Sadrian 86229675Sadrian/* 87229675Sadrian * XDR the MSG_ACCEPTED part of a reply message union 88229675Sadrian */ 89229675Sadrianbool_t 90229675Sadrianxdr_accepted_reply(xdrs, ar) 91229675Sadrian register XDR *xdrs; 92229675Sadrian register struct accepted_reply *ar; 93229675Sadrian{ 94229675Sadrian 95229675Sadrian /* personalized union, rather than calling xdr_union */ 96229675Sadrian if (! xdr_opaque_auth(xdrs, &(ar->ar_verf))) 97229675Sadrian return (FALSE); 98229675Sadrian if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat))) 99229675Sadrian return (FALSE); 100229675Sadrian switch (ar->ar_stat) { 101239885Sadrian 102229675Sadrian case SUCCESS: 103229675Sadrian return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where)); 104229675Sadrian 105229675Sadrian case PROG_MISMATCH: 106229675Sadrian if (! xdr_u_int32_t(xdrs, &(ar->ar_vers.low))) 107229675Sadrian return (FALSE); 108229675Sadrian return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high))); 109229675Sadrian default: 110229675Sadrian break; 111229675Sadrian } 112229675Sadrian return (TRUE); /* TRUE => open ended set of problems */ 113229675Sadrian} 114229675Sadrian 115229675Sadrian/* 116 * XDR the MSG_DENIED part of a reply message union 117 */ 118bool_t 119xdr_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_int32_t(xdrs, &(rr->rj_vers.low))) 131 return (FALSE); 132 return (xdr_u_int32_t(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 140static 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 */ 148bool_t 149xdr_replymsg(xdrs, rmsg) 150 register XDR *xdrs; 151 register struct rpc_msg *rmsg; 152{ 153 if ( 154 xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) && 155 xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) && 156 (rmsg->rm_direction == REPLY) ) 157 return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat), 158 (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t)); 159 return (FALSE); 160} 161 162 163/* 164 * Serializes the "static part" of a call message header. 165 * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers. 166 * The rm_xid is not really static, but the user can easily munge on the fly. 167 */ 168bool_t 169xdr_callhdr(xdrs, cmsg) 170 register XDR *xdrs; 171 register struct rpc_msg *cmsg; 172{ 173 174 cmsg->rm_direction = CALL; 175 cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; 176 if ( 177 (xdrs->x_op == XDR_ENCODE) && 178 xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) && 179 xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) && 180 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) && 181 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) ) 182 return (xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers))); 183 return (FALSE); 184} 185 186/* ************************** Client utility routine ************* */ 187 188static void 189accepted(acpt_stat, error) 190 register enum accept_stat acpt_stat; 191 register struct rpc_err *error; 192{ 193 194 switch (acpt_stat) { 195 196 case PROG_UNAVAIL: 197 error->re_status = RPC_PROGUNAVAIL; 198 return; 199 200 case PROG_MISMATCH: 201 error->re_status = RPC_PROGVERSMISMATCH; 202 return; 203 204 case PROC_UNAVAIL: 205 error->re_status = RPC_PROCUNAVAIL; 206 return; 207 208 case GARBAGE_ARGS: 209 error->re_status = RPC_CANTDECODEARGS; 210 return; 211 212 case SYSTEM_ERR: 213 error->re_status = RPC_SYSTEMERROR; 214 return; 215 216 case SUCCESS: 217 error->re_status = RPC_SUCCESS; 218 return; 219 } 220 /* something's wrong, but we don't know what ... */ 221 error->re_status = RPC_FAILED; 222 error->re_lb.s1 = (long)MSG_ACCEPTED; 223 error->re_lb.s2 = (long)acpt_stat; 224} 225 226static void 227rejected(rjct_stat, error) 228 register enum reject_stat rjct_stat; 229 register struct rpc_err *error; 230{ 231 232 switch (rjct_stat) { 233 234 case RPC_VERSMISMATCH: 235 error->re_status = RPC_VERSMISMATCH; 236 return; 237 238 case AUTH_ERROR: 239 error->re_status = RPC_AUTHERROR; 240 return; 241 default: 242 break; 243 } 244 /* something's wrong, but we don't know what ... */ 245 error->re_status = RPC_FAILED; 246 error->re_lb.s1 = (long)MSG_DENIED; 247 error->re_lb.s2 = (long)rjct_stat; 248} 249 250/* 251 * given a reply message, fills in the error 252 */ 253void 254_seterr_reply(msg, error) 255 register struct rpc_msg *msg; 256 register struct rpc_err *error; 257{ 258 259 /* optimized for normal, SUCCESSful case */ 260 switch (msg->rm_reply.rp_stat) { 261 262 case MSG_ACCEPTED: 263 if (msg->acpted_rply.ar_stat == SUCCESS) { 264 error->re_status = RPC_SUCCESS; 265 return; 266 }; 267 accepted(msg->acpted_rply.ar_stat, error); 268 break; 269 270 case MSG_DENIED: 271 rejected(msg->rjcted_rply.rj_stat, error); 272 break; 273 274 default: 275 error->re_status = RPC_FAILED; 276 error->re_lb.s1 = (long)(msg->rm_reply.rp_stat); 277 break; 278 } 279 switch (error->re_status) { 280 281 case RPC_VERSMISMATCH: 282 error->re_vers.low = msg->rjcted_rply.rj_vers.low; 283 error->re_vers.high = msg->rjcted_rply.rj_vers.high; 284 break; 285 286 case RPC_AUTHERROR: 287 error->re_why = msg->rjcted_rply.rj_why; 288 break; 289 290 case RPC_PROGVERSMISMATCH: 291 error->re_vers.low = msg->acpted_rply.ar_vers.low; 292 error->re_vers.high = msg->acpted_rply.ar_vers.high; 293 break; 294 default: 295 break; 296 } 297} 298