sunrpc/rpc_prot.c

   1 /* @(#)rpc_prot.c       2.3 88/08/07 4.0 RPCSRC */
   2 /*
   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.
   9  *
  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.
  13  *
  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.
  17  *
  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.
  21  *
  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.
  25  *
  26  * Sun Microsystems, Inc.
  27  * 2550 Garcia Avenue
  28  * Mountain View, California  94043
  29  */
  30 #if !defined(lint) && defined(SCCSIDS)
  31 static char sccsid[] = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";
  32 #endif
  33
  34 /*
  35  * rpc_prot.c
  36  *
  37  * Copyright (C) 1984, Sun Microsystems, Inc.
  38  *
  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.
  45  */
  46
  47 #include <sys/param.h>
  48
  49 #include <rpc/rpc.h>
  50
  51 /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
  52
  53 /*
  54  * XDR an opaque authentication struct
  55  * (see auth.h)
  56  */
  57 bool_t
  58 xdr_opaque_auth (XDR *xdrs, struct opaque_auth *ap)
  59 {
  60
  61   if (INTUSE(xdr_enum) (xdrs, &(ap->oa_flavor)))
  62     return INTUSE(xdr_bytes) (xdrs, &ap->oa_base,
  63                       &ap->oa_length, MAX_AUTH_BYTES);
  64   return FALSE;
  65 }
  66 INTDEF(xdr_opaque_auth)
  67
  68 /*
  69  * XDR a DES block
  70  */
  71 bool_t
  72 xdr_des_block (XDR *xdrs, des_block *blkp)
  73 {
  74   return INTUSE(xdr_opaque) (xdrs, (caddr_t) blkp, sizeof (des_block));
  75 }
  76 INTDEF(xdr_des_block)
  77
  78 /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
  79
  80 /*
  81  * XDR the MSG_ACCEPTED part of a reply message union
  82  */
  83 bool_t
  84 xdr_accepted_reply (XDR *xdrs, struct accepted_reply *ar)
  85 {
  86   /* personalized union, rather than calling xdr_union */
  87   if (!INTUSE(xdr_opaque_auth) (xdrs, &(ar->ar_verf)))
  88     return FALSE;
  89   if (!INTUSE(xdr_enum) (xdrs, (enum_t *) & (ar->ar_stat)))
  90     return FALSE;
  91   switch (ar->ar_stat)
  92     {
  93     case SUCCESS:
  94       return ((*(ar->ar_results.proc)) (xdrs, ar->ar_results.where));
  95     case PROG_MISMATCH:
  96       if (!INTUSE(xdr_u_long) (xdrs, &(ar->ar_vers.low)))
  97         return FALSE;
  98       return (INTUSE(xdr_u_long) (xdrs, &(ar->ar_vers.high)));
  99     default:
 100       return TRUE;
 101     }
 102   return TRUE;          /* TRUE => open ended set of problems */
 103 }
 104 INTDEF(xdr_accepted_reply)
 105
 106 /*
 107  * XDR the MSG_DENIED part of a reply message union
 108  */
 109 bool_t
 110 xdr_rejected_reply (XDR *xdrs, struct rejected_reply *rr)
 111 {
 112   /* personalized union, rather than calling xdr_union */
 113   if (!INTUSE(xdr_enum) (xdrs, (enum_t *) & (rr->rj_stat)))
 114     return FALSE;
 115   switch (rr->rj_stat)
 116     {
 117     case RPC_MISMATCH:
 118       if (!INTUSE(xdr_u_long) (xdrs, &(rr->rj_vers.low)))
 119         return FALSE;
 120       return INTUSE(xdr_u_long) (xdrs, &(rr->rj_vers.high));
 121
 122     case AUTH_ERROR:
 123       return INTUSE(xdr_enum) (xdrs, (enum_t *) & (rr->rj_why));
 124     }
 125   return FALSE;
 126 }
 127 INTDEF(xdr_rejected_reply)
 128
 129 static const struct xdr_discrim reply_dscrm[3] =
 130 {
 131   {(int) MSG_ACCEPTED, (xdrproc_t) INTUSE(xdr_accepted_reply)},
 132   {(int) MSG_DENIED, (xdrproc_t) INTUSE(xdr_rejected_reply)},
 133   {__dontcare__, NULL_xdrproc_t}};
 134
 135 /*
 136  * XDR a reply message
 137  */
 138 bool_t
 139 xdr_replymsg (xdrs, rmsg)
 140      XDR *xdrs;
 141      struct rpc_msg *rmsg;
 142 {
 143   if (INTUSE(xdr_u_long) (xdrs, &(rmsg->rm_xid)) &&
 144       INTUSE(xdr_enum) (xdrs, (enum_t *) & (rmsg->rm_direction)) &&
 145       (rmsg->rm_direction == REPLY))
 146     return INTUSE(xdr_union) (xdrs, (enum_t *) & (rmsg->rm_reply.rp_stat),
 147                               (caddr_t) & (rmsg->rm_reply.ru), reply_dscrm,
 148                               NULL_xdrproc_t);
 149   return FALSE;
 150 }
 151 INTDEF(xdr_replymsg)
 152
 153
 154 /*
 155  * Serializes the "static part" of a call message header.
 156  * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
 157  * The rm_xid is not really static, but the user can easily munge on the fly.
 158  */
 159 bool_t
 160 xdr_callhdr (xdrs, cmsg)
 161      XDR *xdrs;
 162      struct rpc_msg *cmsg;
 163 {
 164
 165   cmsg->rm_direction = CALL;
 166   cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
 167   if (
 168        (xdrs->x_op == XDR_ENCODE) &&
 169        INTUSE(xdr_u_long) (xdrs, &(cmsg->rm_xid)) &&
 170        INTUSE(xdr_enum) (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
 171        INTUSE(xdr_u_long) (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 172        INTUSE(xdr_u_long) (xdrs, &(cmsg->rm_call.cb_prog)))
 173     return INTUSE(xdr_u_long) (xdrs, &(cmsg->rm_call.cb_vers));
 174   return FALSE;
 175 }
 176 INTDEF(xdr_callhdr)
 177
 178 /* ************************** Client utility routine ************* */
 179
 180 static void
 181 accepted (enum accept_stat acpt_stat,
 182           struct rpc_err *error)
 183 {
 184   switch (acpt_stat)
 185     {
 186
 187     case PROG_UNAVAIL:
 188       error->re_status = RPC_PROGUNAVAIL;
 189       return;
 190
 191     case PROG_MISMATCH:
 192       error->re_status = RPC_PROGVERSMISMATCH;
 193       return;
 194
 195     case PROC_UNAVAIL:
 196       error->re_status = RPC_PROCUNAVAIL;
 197       return;
 198
 199     case GARBAGE_ARGS:
 200       error->re_status = RPC_CANTDECODEARGS;
 201       return;
 202
 203     case SYSTEM_ERR:
 204       error->re_status = RPC_SYSTEMERROR;
 205       return;
 206
 207     case SUCCESS:
 208       error->re_status = RPC_SUCCESS;
 209       return;
 210     }
 211   /* something's wrong, but we don't know what ... */
 212   error->re_status = RPC_FAILED;
 213   error->re_lb.s1 = (long) MSG_ACCEPTED;
 214   error->re_lb.s2 = (long) acpt_stat;
 215 }
 216
 217 static void
 218 rejected (enum reject_stat rjct_stat,
 219           struct rpc_err *error)
 220 {
 221   switch (rjct_stat)
 222     {
 223     case RPC_VERSMISMATCH:
 224       error->re_status = RPC_VERSMISMATCH;
 225       return;
 226     case AUTH_ERROR:
 227       error->re_status = RPC_AUTHERROR;
 228       return;
 229     default:
 230       /* something's wrong, but we don't know what ... */
 231       error->re_status = RPC_FAILED;
 232       error->re_lb.s1 = (long) MSG_DENIED;
 233       error->re_lb.s2 = (long) rjct_stat;
 234       return;
 235     }
 236 }
 237
 238 /*
 239  * given a reply message, fills in the error
 240  */
 241 void
 242 _seterr_reply (struct rpc_msg *msg,
 243                struct rpc_err *error)
 244 {
 245   /* optimized for normal, SUCCESSful case */
 246   switch (msg->rm_reply.rp_stat)
 247     {
 248     case MSG_ACCEPTED:
 249       if (msg->acpted_rply.ar_stat == SUCCESS)
 250         {
 251           error->re_status = RPC_SUCCESS;
 252           return;
 253         };
 254       accepted (msg->acpted_rply.ar_stat, error);
 255       break;
 256
 257     case MSG_DENIED:
 258       rejected (msg->rjcted_rply.rj_stat, error);
 259       break;
 260
 261     default:
 262       error->re_status = RPC_FAILED;
 263       error->re_lb.s1 = (long) (msg->rm_reply.rp_stat);
 264       break;
 265     }
 266   switch (error->re_status)
 267     {
 268
 269     case RPC_VERSMISMATCH:
 270       error->re_vers.low = msg->rjcted_rply.rj_vers.low;
 271       error->re_vers.high = msg->rjcted_rply.rj_vers.high;
 272       break;
 273
 274     case RPC_AUTHERROR:
 275       error->re_why = msg->rjcted_rply.rj_why;
 276       break;
 277
 278     case RPC_PROGVERSMISMATCH:
 279       error->re_vers.low = msg->acpted_rply.ar_vers.low;
 280       error->re_vers.high = msg->acpted_rply.ar_vers.high;
 281       break;
 282     default:
 283       break;
 284     }
 285 }
 286 libc_hidden_def (_seterr_reply)