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  * $DragonFly: src/lib/libc/rpc/rpc_callmsg.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * rpc_callmsg.c
  37  *
  38  * Copyright (C) 1984, Sun Microsystems, Inc.
  39  *
  40  */
  41
  42 #include "namespace.h"
  43 #include <assert.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46
  47 #include <rpc/rpc.h>
  48 #include "un-namespace.h"
  49
  50 /*
  51  * XDR a call message
  52  */
  53 bool_t
  54 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  55 {
  56         enum msg_type *prm_direction;
  57         int32_t *buf;
  58         struct opaque_auth *oa;
  59
  60         assert(xdrs != NULL);
  61         assert(cmsg != NULL);
  62
  63         if (xdrs->x_op == XDR_ENCODE) {
  64                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  65                         return (FALSE);
  66                 }
  67                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  68                         return (FALSE);
  69                 }
  70                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  71                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  72                         + 2 * BYTES_PER_XDR_UNIT
  73                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  74                 if (buf != NULL) {
  75                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  76                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  77                         if (cmsg->rm_direction != CALL) {
  78                                 return (FALSE);
  79                         }
  80                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  81                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  82                                 return (FALSE);
  83                         }
  84                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  85                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  86                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  87                         oa = &cmsg->rm_call.cb_cred;
  88                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  89                         IXDR_PUT_INT32(buf, oa->oa_length);
  90                         if (oa->oa_length) {
  91                                 memmove(buf, oa->oa_base, oa->oa_length);
  92                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  93                         }
  94                         oa = &cmsg->rm_call.cb_verf;
  95                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  96                         IXDR_PUT_INT32(buf, oa->oa_length);
  97                         if (oa->oa_length) {
  98                                 memmove(buf, oa->oa_base, oa->oa_length);
  99                                 /* no real need....
 100                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
 101                                 */
 102                         }
 103                         return (TRUE);
 104                 }
 105         }
 106         if (xdrs->x_op == XDR_DECODE) {
 107                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 108                 if (buf != NULL) {
 109                         cmsg->rm_xid = IXDR_GET_U_INT32(buf);
 110                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 111                         if (cmsg->rm_direction != CALL) {
 112                                 return (FALSE);
 113                         }
 114                         cmsg->rm_call.cb_rpcvers = IXDR_GET_U_INT32(buf);
 115                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 116                                 return (FALSE);
 117                         }
 118                         cmsg->rm_call.cb_prog = IXDR_GET_U_INT32(buf);
 119                         cmsg->rm_call.cb_vers = IXDR_GET_U_INT32(buf);
 120                         cmsg->rm_call.cb_proc = IXDR_GET_U_INT32(buf);
 121                         oa = &cmsg->rm_call.cb_cred;
 122                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 123                         oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 124                         if (oa->oa_length) {
 125                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 126                                         return (FALSE);
 127                                 }
 128                                 if (oa->oa_base == NULL) {
 129                                         oa->oa_base = (caddr_t)
 130                                             mem_alloc(oa->oa_length);
 131                                         if (oa->oa_base == NULL)
 132                                                 return (FALSE);
 133                                 }
 134                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 135                                 if (buf == NULL) {
 136                                         if (xdr_opaque(xdrs, oa->oa_base,
 137                                             oa->oa_length) == FALSE) {
 138                                                 return (FALSE);
 139                                         }
 140                                 } else {
 141                                         memmove(oa->oa_base, buf,
 142                                             oa->oa_length);
 143                                         /* no real need....
 144                                         buf += RNDUP(oa->oa_length) /
 145                                                 sizeof (int32_t);
 146                                         */
 147                                 }
 148                         }
 149                         oa = &cmsg->rm_call.cb_verf;
 150                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 151                         if (buf == NULL) {
 152                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 153                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 154                                         return (FALSE);
 155                                 }
 156                         } else {
 157                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 158                                 oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 159                         }
 160                         if (oa->oa_length) {
 161                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 162                                         return (FALSE);
 163                                 }
 164                                 if (oa->oa_base == NULL) {
 165                                         oa->oa_base = (caddr_t)
 166                                             mem_alloc(oa->oa_length);
 167                                         if (oa->oa_base == NULL)
 168                                                 return (FALSE);
 169                                 }
 170                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 171                                 if (buf == NULL) {
 172                                         if (xdr_opaque(xdrs, oa->oa_base,
 173                                             oa->oa_length) == FALSE) {
 174                                                 return (FALSE);
 175                                         }
 176                                 } else {
 177                                         memmove(oa->oa_base, buf,
 178                                             oa->oa_length);
 179                                         /* no real need...
 180                                         buf += RNDUP(oa->oa_length) /
 181                                                 sizeof (int32_t);
 182                                         */
 183                                 }
 184                         }
 185                         return (TRUE);
 186                 }
 187         }
 188         prm_direction = &cmsg->rm_direction;
 189         if (
 190             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 191             xdr_enum(xdrs, (enum_t *) prm_direction) &&
 192             (cmsg->rm_direction == CALL) &&
 193             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 194             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 195             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 196             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 197             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 198             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 199                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 200         return (FALSE);
 201 }