sunrpc/rpc_cmsg.c

   1 /*
   2  * rpc_callmsg.c
   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 <string.h>
  35 #include <sys/param.h>
  36 #include <rpc/rpc.h>
  37
  38 /*
  39  * XDR a call message
  40  */
  41 bool_t
  42 xdr_callmsg (XDR *xdrs, struct rpc_msg *cmsg)
  43 {
  44   int32_t *buf;
  45   struct opaque_auth *oa;
  46
  47   if (xdrs->x_op == XDR_ENCODE)
  48     {
  49       if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
  50         {
  51           return (FALSE);
  52         }
  53       if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
  54         {
  55           return (FALSE);
  56         }
  57       buf = XDR_INLINE (xdrs, 8 * BYTES_PER_XDR_UNIT
  58                         + RNDUP (cmsg->rm_call.cb_cred.oa_length)
  59                         + 2 * BYTES_PER_XDR_UNIT
  60                         + RNDUP (cmsg->rm_call.cb_verf.oa_length));
  61       if (buf != NULL)
  62         {
  63           (void) IXDR_PUT_LONG (buf, cmsg->rm_xid);
  64           (void) IXDR_PUT_ENUM (buf, cmsg->rm_direction);
  65           if (cmsg->rm_direction != CALL)
  66             return FALSE;
  67           (void) IXDR_PUT_LONG (buf, cmsg->rm_call.cb_rpcvers);
  68           if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
  69             return FALSE;
  70           (void) IXDR_PUT_LONG (buf, cmsg->rm_call.cb_prog);
  71           (void) IXDR_PUT_LONG (buf, cmsg->rm_call.cb_vers);
  72           (void) IXDR_PUT_LONG (buf, cmsg->rm_call.cb_proc);
  73           oa = &cmsg->rm_call.cb_cred;
  74           (void) IXDR_PUT_ENUM (buf, oa->oa_flavor);
  75           (void) IXDR_PUT_INT32 (buf, oa->oa_length);
  76           if (oa->oa_length)
  77             {
  78               memcpy ((caddr_t) buf, oa->oa_base, oa->oa_length);
  79               buf = (int32_t *) ((char *) buf + RNDUP (oa->oa_length));
  80             }
  81           oa = &cmsg->rm_call.cb_verf;
  82           (void) IXDR_PUT_ENUM (buf, oa->oa_flavor);
  83           (void) IXDR_PUT_INT32 (buf, oa->oa_length);
  84           if (oa->oa_length)
  85             {
  86               memcpy ((caddr_t) buf, oa->oa_base, oa->oa_length);
  87               /* no real need....
  88                  buf = (long *) ((char *) buf + RNDUP(oa->oa_length));
  89                */
  90             }
  91           return TRUE;
  92         }
  93     }
  94   if (xdrs->x_op == XDR_DECODE)
  95     {
  96       buf = XDR_INLINE (xdrs, 8 * BYTES_PER_XDR_UNIT);
  97       if (buf != NULL)
  98         {
  99           cmsg->rm_xid = IXDR_GET_LONG (buf);
 100           cmsg->rm_direction = IXDR_GET_ENUM (buf, enum msg_type);
 101           if (cmsg->rm_direction != CALL)
 102             {
 103               return FALSE;
 104             }
 105           cmsg->rm_call.cb_rpcvers = IXDR_GET_LONG (buf);
 106           if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
 107             {
 108               return FALSE;
 109             }
 110           cmsg->rm_call.cb_prog = IXDR_GET_LONG (buf);
 111           cmsg->rm_call.cb_vers = IXDR_GET_LONG (buf);
 112           cmsg->rm_call.cb_proc = IXDR_GET_LONG (buf);
 113           oa = &cmsg->rm_call.cb_cred;
 114           oa->oa_flavor = IXDR_GET_ENUM (buf, enum_t);
 115           oa->oa_length = IXDR_GET_INT32 (buf);
 116           if (oa->oa_length)
 117             {
 118               if (oa->oa_length > MAX_AUTH_BYTES)
 119                 return FALSE;
 120               if (oa->oa_base == NULL)
 121                 {
 122                   oa->oa_base = (caddr_t)
 123                     mem_alloc (oa->oa_length);
 124                 }
 125               buf = XDR_INLINE (xdrs, RNDUP (oa->oa_length));
 126               if (buf == NULL)
 127                 {
 128                   if (xdr_opaque (xdrs, oa->oa_base,
 129                                   oa->oa_length) == FALSE)
 130                     return FALSE;
 131                 }
 132               else
 133                 {
 134                   memcpy (oa->oa_base, (caddr_t) buf, oa->oa_length);
 135                   /* no real need....
 136                      buf = (long *) ((char *) buf
 137                      + RNDUP(oa->oa_length));
 138                    */
 139                 }
 140             }
 141           oa = &cmsg->rm_call.cb_verf;
 142           buf = XDR_INLINE (xdrs, 2 * BYTES_PER_XDR_UNIT);
 143           if (buf == NULL)
 144             {
 145               if (xdr_enum (xdrs, &oa->oa_flavor) == FALSE ||
 146                   xdr_u_int (xdrs, &oa->oa_length) == FALSE)
 147                 {
 148                   return FALSE;
 149                 }
 150             }
 151           else
 152             {
 153               oa->oa_flavor = IXDR_GET_ENUM (buf, enum_t);
 154               oa->oa_length = IXDR_GET_INT32 (buf);
 155             }
 156           if (oa->oa_length)
 157             {
 158               if (oa->oa_length > MAX_AUTH_BYTES)
 159                 return FALSE;
 160               if (oa->oa_base == NULL)
 161                 {
 162                   oa->oa_base = (caddr_t)
 163                     mem_alloc (oa->oa_length);
 164                 }
 165               buf = XDR_INLINE (xdrs, RNDUP (oa->oa_length));
 166               if (buf == NULL)
 167                 {
 168                   if (xdr_opaque (xdrs, oa->oa_base,
 169                                   oa->oa_length) == FALSE)
 170                     return FALSE;
 171                 }
 172               else
 173                 {
 174                   memcpy (oa->oa_base, (caddr_t) buf, oa->oa_length);
 175                   /* no real need...
 176                      buf = (long *) ((char *) buf
 177                      + RNDUP(oa->oa_length));
 178                    */
 179                 }
 180             }
 181           return TRUE;
 182         }
 183     }
 184   if (
 185        xdr_u_long (xdrs, &(cmsg->rm_xid)) &&
 186        xdr_enum (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
 187        (cmsg->rm_direction == CALL) &&
 188        xdr_u_long (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 189        (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 190        xdr_u_long (xdrs, &(cmsg->rm_call.cb_prog)) &&
 191        xdr_u_long (xdrs, &(cmsg->rm_call.cb_vers)) &&
 192        xdr_u_long (xdrs, &(cmsg->rm_call.cb_proc)) &&
 193        xdr_opaque_auth (xdrs, &(cmsg->rm_call.cb_cred)))
 194     return xdr_opaque_auth (xdrs, &(cmsg->rm_call.cb_verf));
 195   return FALSE;
 196 }
 197 libc_hidden_nolink (xdr_callmsg, GLIBC_2_0)