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