sys/rpc/rpc_callmsg.c

   1 /*      $NetBSD: rpc_callmsg.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $    */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  *
   6  * Copyright (c) 2009, Sun Microsystems, Inc.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are met:
  11  * - Redistributions of source code must retain the above copyright notice,
  12  *   this list of conditions and the following disclaimer.
  13  * - Redistributions in binary form must reproduce the above copyright notice,
  14  *   this list of conditions and the following disclaimer in the documentation
  15  *   and/or other materials provided with the distribution.
  16  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  17  *   contributors may be used to endorse or promote products derived
  18  *   from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 /*
  35  * rpc_callmsg.c
  36  *
  37  * Copyright (C) 1984, Sun Microsystems, Inc.
  38  *
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/malloc.h>
  44
  45 #include <rpc/rpc.h>
  46
  47 /*
  48  * XDR a call message
  49  */
  50 bool_t
  51 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  52 {
  53         enum msg_type *prm_direction;
  54         int32_t *buf;
  55         struct opaque_auth *oa;
  56
  57         if (xdrs->x_op == XDR_ENCODE) {
  58                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  59                         return (FALSE);
  60                 }
  61                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  62                         return (FALSE);
  63                 }
  64                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  65                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  66                         + 2 * BYTES_PER_XDR_UNIT
  67                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  68                 if (buf != NULL) {
  69                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  70                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  71                         if (cmsg->rm_direction != CALL) {
  72                                 return (FALSE);
  73                         }
  74                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  75                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  76                                 return (FALSE);
  77                         }
  78                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  79                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  80                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  81                         oa = &cmsg->rm_call.cb_cred;
  82                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  83                         IXDR_PUT_INT32(buf, oa->oa_length);
  84                         if (oa->oa_length) {
  85                                 memcpy(buf, oa->oa_base, oa->oa_length);
  86                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  87                         }
  88                         oa = &cmsg->rm_call.cb_verf;
  89                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  90                         IXDR_PUT_INT32(buf, oa->oa_length);
  91                         if (oa->oa_length) {
  92                                 memcpy(buf, oa->oa_base, oa->oa_length);
  93                                 /* no real need....
  94                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  95                                 */
  96                         }
  97                         return (TRUE);
  98                 }
  99         }
 100         if (xdrs->x_op == XDR_DECODE) {
 101                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 102                 if (buf != NULL) {
 103                         cmsg->rm_xid = IXDR_GET_UINT32(buf);
 104                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 105                         if (cmsg->rm_direction != CALL) {
 106                                 return (FALSE);
 107                         }
 108                         cmsg->rm_call.cb_rpcvers = IXDR_GET_UINT32(buf);
 109                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 110                                 return (FALSE);
 111                         }
 112                         cmsg->rm_call.cb_prog = IXDR_GET_UINT32(buf);
 113                         cmsg->rm_call.cb_vers = IXDR_GET_UINT32(buf);
 114                         cmsg->rm_call.cb_proc = IXDR_GET_UINT32(buf);
 115                         oa = &cmsg->rm_call.cb_cred;
 116                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 117                         oa->oa_length = (u_int)IXDR_GET_UINT32(buf);
 118                         if (oa->oa_length) {
 119                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 120                                         return (FALSE);
 121                                 }
 122                                 if (oa->oa_base == NULL) {
 123                                         oa->oa_base = (caddr_t)
 124                                             mem_alloc(oa->oa_length);
 125                                         if (oa->oa_base == NULL)
 126                                                 return (FALSE);
 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, 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 = (u_int)IXDR_GET_UINT32(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                                         if (oa->oa_base == NULL)
 162                                                 return (FALSE);
 163                                 }
 164                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 165                                 if (buf == NULL) {
 166                                         if (xdr_opaque(xdrs, oa->oa_base,
 167                                             oa->oa_length) == FALSE) {
 168                                                 return (FALSE);
 169                                         }
 170                                 } else {
 171                                         memcpy(oa->oa_base, buf,
 172                                             oa->oa_length);
 173                                         /* no real need...
 174                                         buf += RNDUP(oa->oa_length) /
 175                                                 sizeof (int32_t);
 176                                         */
 177                                 }
 178                         }
 179                         return (TRUE);
 180                 }
 181         }
 182         prm_direction = &cmsg->rm_direction;
 183         if (
 184             xdr_uint32_t(xdrs, &(cmsg->rm_xid)) &&
 185             xdr_enum(xdrs, (enum_t *) prm_direction) &&
 186             (cmsg->rm_direction == CALL) &&
 187             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 188             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 189             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 190             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 191             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 192             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 193                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 194         return (FALSE);
 195 }