lib/libc/rpc/rpc_callmsg.c

   1 /*      $NetBSD: rpc_callmsg.c,v 1.20 2013/03/11 20:19:29 tron Exp $    */
   2
   3 /*
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above
  13  *       copyright notice, this list of conditions and the following
  14  *       disclaimer in the documentation and/or other materials
  15  *       provided with the distribution.
  16  *     * Neither the name of the "Oracle America, 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
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #if defined(LIBC_SCCS) && !defined(lint)
  36 #if 0
  37 static char *sccsid = "@(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";
  38 static char *sccsid = "@(#)rpc_callmsg.c        2.1 88/07/29 4.0 RPCSRC";
  39 #else
  40 __RCSID("$NetBSD: rpc_callmsg.c,v 1.20 2013/03/11 20:19:29 tron Exp $");
  41 #endif
  42 #endif
  43
  44 /*
  45  * rpc_callmsg.c
  46  *
  47  * Copyright (C) 1984, Sun Microsystems, Inc.
  48  *
  49  */
  50
  51 #include "namespace.h"
  52
  53 #include <sys/param.h>
  54
  55 #include <assert.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58
  59 #include <rpc/rpc.h>
  60
  61 #ifdef __weak_alias
  62 __weak_alias(xdr_callmsg,_xdr_callmsg)
  63 #endif
  64
  65 /*
  66  * XDR a call message
  67  */
  68 bool_t
  69 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  70 {
  71         int32_t *buf;
  72         struct opaque_auth *oa;
  73
  74         _DIAGASSERT(xdrs != NULL);
  75         _DIAGASSERT(cmsg != NULL);
  76
  77         if (xdrs->x_op == XDR_ENCODE) {
  78                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  79                         return (FALSE);
  80                 }
  81                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  82                         return (FALSE);
  83                 }
  84                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  85                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  86                         + 2 * BYTES_PER_XDR_UNIT
  87                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  88                 if (buf != NULL) {
  89                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  90                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  91                         if (cmsg->rm_direction != CALL) {
  92                                 return (FALSE);
  93                         }
  94                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  95                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  96                                 return (FALSE);
  97                         }
  98                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  99                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
 100                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
 101                         oa = &cmsg->rm_call.cb_cred;
 102                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
 103                         IXDR_PUT_INT32(buf, oa->oa_length);
 104                         if (oa->oa_length) {
 105                                 memmove(buf, oa->oa_base, oa->oa_length);
 106                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
 107                         }
 108                         oa = &cmsg->rm_call.cb_verf;
 109                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
 110                         IXDR_PUT_INT32(buf, oa->oa_length);
 111                         if (oa->oa_length) {
 112                                 memmove(buf, oa->oa_base, oa->oa_length);
 113                                 /* no real need....
 114                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
 115                                 */
 116                         }
 117                         return (TRUE);
 118                 }
 119         }
 120         if (xdrs->x_op == XDR_DECODE) {
 121                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 122                 if (buf != NULL) {
 123                         cmsg->rm_xid = IXDR_GET_U_INT32(buf);
 124                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 125                         if (cmsg->rm_direction != CALL) {
 126                                 return (FALSE);
 127                         }
 128                         cmsg->rm_call.cb_rpcvers = IXDR_GET_U_INT32(buf);
 129                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 130                                 return (FALSE);
 131                         }
 132                         cmsg->rm_call.cb_prog = IXDR_GET_U_INT32(buf);
 133                         cmsg->rm_call.cb_vers = IXDR_GET_U_INT32(buf);
 134                         cmsg->rm_call.cb_proc = IXDR_GET_U_INT32(buf);
 135                         oa = &cmsg->rm_call.cb_cred;
 136                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 137                         oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 138                         if (oa->oa_length) {
 139                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 140                                         return (FALSE);
 141                                 }
 142                                 if (oa->oa_base == NULL) {
 143                                         oa->oa_base = mem_alloc(oa->oa_length);
 144                                         if (oa->oa_base == NULL)
 145                                                 return (FALSE);
 146                                 }
 147                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 148                                 if (buf == NULL) {
 149                                         if (xdr_opaque(xdrs, oa->oa_base,
 150                                             oa->oa_length) == FALSE) {
 151                                                 return (FALSE);
 152                                         }
 153                                 } else {
 154                                         memmove(oa->oa_base, buf,
 155                                             oa->oa_length);
 156                                         /* no real need....
 157                                         buf += RNDUP(oa->oa_length) /
 158                                                 sizeof (int32_t);
 159                                         */
 160                                 }
 161                         }
 162                         oa = &cmsg->rm_call.cb_verf;
 163                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 164                         if (buf == NULL) {
 165                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 166                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 167                                         return (FALSE);
 168                                 }
 169                         } else {
 170                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 171                                 oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 172                         }
 173                         if (oa->oa_length) {
 174                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 175                                         return (FALSE);
 176                                 }
 177                                 if (oa->oa_base == NULL) {
 178                                         oa->oa_base = mem_alloc(oa->oa_length);
 179                                         if (oa->oa_base == NULL)
 180                                                 return (FALSE);
 181                                 }
 182                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 183                                 if (buf == NULL) {
 184                                         if (xdr_opaque(xdrs, oa->oa_base,
 185                                             oa->oa_length) == FALSE) {
 186                                                 return (FALSE);
 187                                         }
 188                                 } else {
 189                                         memmove(oa->oa_base, buf,
 190                                             oa->oa_length);
 191                                         /* no real need...
 192                                         buf += RNDUP(oa->oa_length) /
 193                                                 sizeof (int32_t);
 194                                         */
 195                                 }
 196                         }
 197                         return (TRUE);
 198                 }
 199         }
 200         if (
 201             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 202             xdr_enum(xdrs, (enum_t *)(void *)&(cmsg->rm_direction)) &&
 203             (cmsg->rm_direction == CALL) &&
 204             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 205             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 206             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 207             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 208             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 209             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 210                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 211         return (FALSE);
 212 }