lib/libc/rpc/rpc_callmsg.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro
  29  * @(#)rpc_callmsg.c    2.1 88/07/29 4.0 RPCSRC
  30  * $NetBSD: rpc_callmsg.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $
  31  * $FreeBSD: src/lib/libc/rpc/rpc_callmsg.c,v 1.13 2007/11/20 01:51:20 jb Exp $
  32  */
  33
  34 /*
  35  * rpc_callmsg.c
  36  *
  37  * Copyright (C) 1984, Sun Microsystems, Inc.
  38  *
  39  */
  40
  41 #include "namespace.h"
  42 #include <assert.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45
  46 #include <rpc/rpc.h>
  47 #include "un-namespace.h"
  48
  49 /*
  50  * XDR a call message
  51  */
  52 bool_t
  53 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  54 {
  55         enum msg_type *prm_direction;
  56         int32_t *buf;
  57         struct opaque_auth *oa;
  58
  59         assert(xdrs != NULL);
  60         assert(cmsg != NULL);
  61
  62         if (xdrs->x_op == XDR_ENCODE) {
  63                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  64                         return (FALSE);
  65                 }
  66                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  67                         return (FALSE);
  68                 }
  69                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  70                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  71                         + 2 * BYTES_PER_XDR_UNIT
  72                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  73                 if (buf != NULL) {
  74                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  75                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  76                         if (cmsg->rm_direction != CALL) {
  77                                 return (FALSE);
  78                         }
  79                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  80                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  81                                 return (FALSE);
  82                         }
  83                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  84                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  85                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  86                         oa = &cmsg->rm_call.cb_cred;
  87                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  88                         IXDR_PUT_INT32(buf, oa->oa_length);
  89                         if (oa->oa_length) {
  90                                 memmove(buf, oa->oa_base, oa->oa_length);
  91                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  92                         }
  93                         oa = &cmsg->rm_call.cb_verf;
  94                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  95                         IXDR_PUT_INT32(buf, oa->oa_length);
  96                         if (oa->oa_length) {
  97                                 memmove(buf, oa->oa_base, oa->oa_length);
  98                                 /* no real need....
  99                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
 100                                 */
 101                         }
 102                         return (TRUE);
 103                 }
 104         }
 105         if (xdrs->x_op == XDR_DECODE) {
 106                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 107                 if (buf != NULL) {
 108                         cmsg->rm_xid = IXDR_GET_U_INT32(buf);
 109                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 110                         if (cmsg->rm_direction != CALL) {
 111                                 return (FALSE);
 112                         }
 113                         cmsg->rm_call.cb_rpcvers = IXDR_GET_U_INT32(buf);
 114                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 115                                 return (FALSE);
 116                         }
 117                         cmsg->rm_call.cb_prog = IXDR_GET_U_INT32(buf);
 118                         cmsg->rm_call.cb_vers = IXDR_GET_U_INT32(buf);
 119                         cmsg->rm_call.cb_proc = IXDR_GET_U_INT32(buf);
 120                         oa = &cmsg->rm_call.cb_cred;
 121                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 122                         oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 123                         if (oa->oa_length) {
 124                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 125                                         return (FALSE);
 126                                 }
 127                                 if (oa->oa_base == NULL) {
 128                                         oa->oa_base = (caddr_t)
 129                                             mem_alloc(oa->oa_length);
 130                                         if (oa->oa_base == NULL)
 131                                                 return (FALSE);
 132                                 }
 133                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 134                                 if (buf == NULL) {
 135                                         if (xdr_opaque(xdrs, oa->oa_base,
 136                                             oa->oa_length) == FALSE) {
 137                                                 return (FALSE);
 138                                         }
 139                                 } else {
 140                                         memmove(oa->oa_base, buf,
 141                                             oa->oa_length);
 142                                         /* no real need....
 143                                         buf += RNDUP(oa->oa_length) /
 144                                                 sizeof (int32_t);
 145                                         */
 146                                 }
 147                         }
 148                         oa = &cmsg->rm_call.cb_verf;
 149                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 150                         if (buf == NULL) {
 151                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 152                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 153                                         return (FALSE);
 154                                 }
 155                         } else {
 156                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 157                                 oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 158                         }
 159                         if (oa->oa_length) {
 160                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 161                                         return (FALSE);
 162                                 }
 163                                 if (oa->oa_base == NULL) {
 164                                         oa->oa_base = (caddr_t)
 165                                             mem_alloc(oa->oa_length);
 166                                         if (oa->oa_base == NULL)
 167                                                 return (FALSE);
 168                                 }
 169                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 170                                 if (buf == NULL) {
 171                                         if (xdr_opaque(xdrs, oa->oa_base,
 172                                             oa->oa_length) == FALSE) {
 173                                                 return (FALSE);
 174                                         }
 175                                 } else {
 176                                         memmove(oa->oa_base, buf,
 177                                             oa->oa_length);
 178                                         /* no real need...
 179                                         buf += RNDUP(oa->oa_length) /
 180                                                 sizeof (int32_t);
 181                                         */
 182                                 }
 183                         }
 184                         return (TRUE);
 185                 }
 186         }
 187         prm_direction = &cmsg->rm_direction;
 188         if (
 189             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 190             xdr_enum(xdrs, (enum_t *) prm_direction) &&
 191             (cmsg->rm_direction == CALL) &&
 192             xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 193             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 194             xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) &&
 195             xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_vers)) &&
 196             xdr_rpcproc(xdrs, &(cmsg->rm_call.cb_proc)) &&
 197             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 198                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 199         return (FALSE);
 200 }