sys/rpc/rpc_callmsg.c

   1 /*      $NetBSD: rpc_callmsg.c,v 1.16 2000/07/14 08:40:42 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_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";
  33 static char *sccsid = "@(#)rpc_callmsg.c        2.1 88/07/29 4.0 RPCSRC";
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 /*
  39  * rpc_callmsg.c
  40  *
  41  * Copyright (C) 1984, Sun Microsystems, Inc.
  42  *
  43  */
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/malloc.h>
  48
  49 #include <rpc/rpc.h>
  50
  51 /*
  52  * XDR a call message
  53  */
  54 bool_t
  55 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  56 {
  57         enum msg_type *prm_direction;
  58         int32_t *buf;
  59         struct opaque_auth *oa;
  60
  61         if (xdrs->x_op == XDR_ENCODE) {
  62                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  63                         return (FALSE);
  64                 }
  65                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  66                         return (FALSE);
  67                 }
  68                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  69                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  70                         + 2 * BYTES_PER_XDR_UNIT
  71                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  72                 if (buf != NULL) {
  73                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  74                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  75                         if (cmsg->rm_direction != CALL) {
  76                                 return (FALSE);
  77                         }
  78                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  79                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  80                                 return (FALSE);
  81                         }
  82                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  83                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  84                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  85                         oa = &cmsg->rm_call.cb_cred;
  86                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  87                         IXDR_PUT_INT32(buf, oa->oa_length);
  88                         if (oa->oa_length) {
  89                                 memcpy(buf, oa->oa_base, oa->oa_length);
  90                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  91                         }
  92                         oa = &cmsg->rm_call.cb_verf;
  93                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  94                         IXDR_PUT_INT32(buf, oa->oa_length);
  95                         if (oa->oa_length) {
  96                                 memcpy(buf, oa->oa_base, oa->oa_length);
  97                                 /* no real need....
  98                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  99                                 */
 100                         }
 101                         return (TRUE);
 102                 }
 103         }
 104         if (xdrs->x_op == XDR_DECODE) {
 105                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 106                 if (buf != NULL) {
 107                         cmsg->rm_xid = IXDR_GET_UINT32(buf);
 108                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 109                         if (cmsg->rm_direction != CALL) {
 110                                 return (FALSE);
 111                         }
 112                         cmsg->rm_call.cb_rpcvers = IXDR_GET_UINT32(buf);
 113                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 114                                 return (FALSE);
 115                         }
 116                         cmsg->rm_call.cb_prog = IXDR_GET_UINT32(buf);
 117                         cmsg->rm_call.cb_vers = IXDR_GET_UINT32(buf);
 118                         cmsg->rm_call.cb_proc = IXDR_GET_UINT32(buf);
 119                         oa = &cmsg->rm_call.cb_cred;
 120                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 121                         oa->oa_length = (u_int)IXDR_GET_UINT32(buf);
 122                         if (oa->oa_length) {
 123                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 124                                         return (FALSE);
 125                                 }
 126                                 if (oa->oa_base == NULL) {
 127                                         oa->oa_base = (caddr_t)
 128                                             mem_alloc(oa->oa_length);
 129                                         if (oa->oa_base == NULL)
 130                                                 return (FALSE);
 131                                 }
 132                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 133                                 if (buf == NULL) {
 134                                         if (xdr_opaque(xdrs, oa->oa_base,
 135                                             oa->oa_length) == FALSE) {
 136                                                 return (FALSE);
 137                                         }
 138                                 } else {
 139                                         memcpy(oa->oa_base, buf,
 140                                             oa->oa_length);
 141                                         /* no real need....
 142                                         buf += RNDUP(oa->oa_length) /
 143                                                 sizeof (int32_t);
 144                                         */
 145                                 }
 146                         }
 147                         oa = &cmsg->rm_call.cb_verf;
 148                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 149                         if (buf == NULL) {
 150                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 151                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 152                                         return (FALSE);
 153                                 }
 154                         } else {
 155                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 156                                 oa->oa_length = (u_int)IXDR_GET_UINT32(buf);
 157                         }
 158                         if (oa->oa_length) {
 159                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 160                                         return (FALSE);
 161                                 }
 162                                 if (oa->oa_base == NULL) {
 163                                         oa->oa_base = (caddr_t)
 164                                             mem_alloc(oa->oa_length);
 165                                         if (oa->oa_base == NULL)
 166                                                 return (FALSE);
 167                                 }
 168                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 169                                 if (buf == NULL) {
 170                                         if (xdr_opaque(xdrs, oa->oa_base,
 171                                             oa->oa_length) == FALSE) {
 172                                                 return (FALSE);
 173                                         }
 174                                 } else {
 175                                         memcpy(oa->oa_base, buf,
 176                                             oa->oa_length);
 177                                         /* no real need...
 178                                         buf += RNDUP(oa->oa_length) /
 179                                                 sizeof (int32_t);
 180                                         */
 181                                 }
 182                         }
 183                         return (TRUE);
 184                 }
 185         }
 186         prm_direction = &cmsg->rm_direction;
 187         if (
 188             xdr_uint32_t(xdrs, &(cmsg->rm_xid)) &&
 189             xdr_enum(xdrs, (enum_t *) prm_direction) &&
 190             (cmsg->rm_direction == CALL) &&
 191             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 192             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 193             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 194             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 195             xdr_uint32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 196             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 197                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 198         return (FALSE);
 199 }