lib/libc/rpc/rpc_callmsg.c

   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
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 /*static char *sccsid = "from: @(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";*/
  32 /*static char *sccsid = "from: @(#)rpc_callmsg.c        2.1 88/07/29 4.0 RPCSRC";*/
  33 static char *rcsid = "$FreeBSD: src/lib/libc/rpc/rpc_callmsg.c,v 1.9 1999/08/28 00:00:45 peter Exp $";
  34 #endif
  35
  36 /*
  37  * rpc_callmsg.c
  38  *
  39  * Copyright (C) 1984, Sun Microsystems, Inc.
  40  *
  41  */
  42
  43 #include <sys/param.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <rpc/rpc.h>
  47
  48 /*
  49  * XDR a call message
  50  */
  51 bool_t
  52 xdr_callmsg(xdrs, cmsg)
  53         register XDR *xdrs;
  54         register struct rpc_msg *cmsg;
  55 {
  56         register int32_t *buf;
  57         register struct opaque_auth *oa;
  58
  59         if (xdrs->x_op == XDR_ENCODE) {
  60                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  61                         return (FALSE);
  62                 }
  63                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  64                         return (FALSE);
  65                 }
  66                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  67                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  68                         + 2 * BYTES_PER_XDR_UNIT
  69                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  70                 if (buf != NULL) {
  71                         IXDR_PUT_LONG(buf, cmsg->rm_xid);
  72                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  73                         if (cmsg->rm_direction != CALL) {
  74                                 return (FALSE);
  75                         }
  76                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_rpcvers);
  77                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  78                                 return (FALSE);
  79                         }
  80                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_prog);
  81                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_vers);
  82                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_proc);
  83                         oa = &cmsg->rm_call.cb_cred;
  84                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  85                         IXDR_PUT_LONG(buf, oa->oa_length);
  86                         if (oa->oa_length) {
  87                                 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length);
  88                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  89                         }
  90                         oa = &cmsg->rm_call.cb_verf;
  91                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  92                         IXDR_PUT_LONG(buf, oa->oa_length);
  93                         if (oa->oa_length) {
  94                                 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length);
  95                                 /* no real need....
  96                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  97                                 */
  98                         }
  99                         return (TRUE);
 100                 }
 101         }
 102         if (xdrs->x_op == XDR_DECODE) {
 103                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 104                 if (buf != NULL) {
 105                         cmsg->rm_xid = IXDR_GET_LONG(buf);
 106                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 107                         if (cmsg->rm_direction != CALL) {
 108                                 return (FALSE);
 109                         }
 110                         cmsg->rm_call.cb_rpcvers = IXDR_GET_LONG(buf);
 111                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 112                                 return (FALSE);
 113                         }
 114                         cmsg->rm_call.cb_prog = IXDR_GET_LONG(buf);
 115                         cmsg->rm_call.cb_vers = IXDR_GET_LONG(buf);
 116                         cmsg->rm_call.cb_proc = IXDR_GET_LONG(buf);
 117                         oa = &cmsg->rm_call.cb_cred;
 118                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 119                         oa->oa_length = IXDR_GET_LONG(buf);
 120                         if (oa->oa_length) {
 121                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 122                                         return (FALSE);
 123                                 }
 124                                 if (oa->oa_base == NULL) {
 125                                         oa->oa_base = (caddr_t)
 126                                                 mem_alloc(oa->oa_length);
 127                                 }
 128                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 129                                 if (buf == NULL) {
 130                                         if (xdr_opaque(xdrs, oa->oa_base,
 131                                             oa->oa_length) == FALSE) {
 132                                                 return (FALSE);
 133                                         }
 134                                 } else {
 135                                         memcpy(oa->oa_base, (caddr_t)buf,
 136                                             oa->oa_length);
 137                                         /* no real need....
 138                                         buf += RNDUP(oa->oa_length) /
 139                                                 sizeof (int32_t);
 140                                         */
 141                                 }
 142                         }
 143                         oa = &cmsg->rm_call.cb_verf;
 144                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 145                         if (buf == NULL) {
 146                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 147                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 148                                         return (FALSE);
 149                                 }
 150                         } else {
 151                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 152                                 oa->oa_length = IXDR_GET_LONG(buf);
 153                         }
 154                         if (oa->oa_length) {
 155                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 156                                         return (FALSE);
 157                                 }
 158                                 if (oa->oa_base == NULL) {
 159                                         oa->oa_base = (caddr_t)
 160                                                 mem_alloc(oa->oa_length);
 161                                 }
 162                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 163                                 if (buf == NULL) {
 164                                         if (xdr_opaque(xdrs, oa->oa_base,
 165                                             oa->oa_length) == FALSE) {
 166                                                 return (FALSE);
 167                                         }
 168                                 } else {
 169                                         memcpy(oa->oa_base, (caddr_t)buf,
 170                                             oa->oa_length);
 171                                         /* no real need...
 172                                         buf += RNDUP(oa->oa_length) /
 173                                                 sizeof (int32_t);
 174                                         */
 175                                 }
 176                         }
 177                         return (TRUE);
 178                 }
 179         }
 180         if (
 181             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 182             xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
 183             (cmsg->rm_direction == CALL) &&
 184             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 185             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 186             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 187             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 188             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 189             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 190             return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 191         return (FALSE);
 192 }
 193