lib/libc/rpc/rpc_callmsg.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro
  30  * @(#)rpc_callmsg.c    2.1 88/07/29 4.0 RPCSRC
  31  * $NetBSD: rpc_callmsg.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $
  32  * $FreeBSD: src/lib/libc/rpc/rpc_callmsg.c,v 1.13 2007/11/20 01:51:20 jb Exp $
  33  * $DragonFly: src/lib/libc/rpc/rpc_callmsg.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
  34  */
  35
  36 /*
  37  * rpc_callmsg.c
  38  *
  39  * Copyright (C) 1984, Sun Microsystems, Inc.
  40  *
  41  */
  42
  43 #include "namespace.h"
  44 #include <assert.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47
  48 #include <rpc/rpc.h>
  49 #include "un-namespace.h"
  50
  51 /*
  52  * XDR a call message
  53  */
  54 bool_t
  55 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  56 {
  57         enum msg_type *prm_direction;
  58         int32_t *buf;
  59         struct opaque_auth *oa;
  60
  61         assert(xdrs != NULL);
  62         assert(cmsg != NULL);
  63
  64         if (xdrs->x_op == XDR_ENCODE) {
  65                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  66                         return (FALSE);
  67                 }
  68                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  69                         return (FALSE);
  70                 }
  71                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  72                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  73                         + 2 * BYTES_PER_XDR_UNIT
  74                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  75                 if (buf != NULL) {
  76                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  77                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  78                         if (cmsg->rm_direction != CALL) {
  79                                 return (FALSE);
  80                         }
  81                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  82                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  83                                 return (FALSE);
  84                         }
  85                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  86                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  87                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  88                         oa = &cmsg->rm_call.cb_cred;
  89                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  90                         IXDR_PUT_INT32(buf, oa->oa_length);
  91                         if (oa->oa_length) {
  92                                 memmove(buf, oa->oa_base, oa->oa_length);
  93                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  94                         }
  95                         oa = &cmsg->rm_call.cb_verf;
  96                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  97                         IXDR_PUT_INT32(buf, oa->oa_length);
  98                         if (oa->oa_length) {
  99                                 memmove(buf, oa->oa_base, oa->oa_length);
 100                                 /* no real need....
 101                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
 102                                 */
 103                         }
 104                         return (TRUE);
 105                 }
 106         }
 107         if (xdrs->x_op == XDR_DECODE) {
 108                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 109                 if (buf != NULL) {
 110                         cmsg->rm_xid = IXDR_GET_U_INT32(buf);
 111                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 112                         if (cmsg->rm_direction != CALL) {
 113                                 return (FALSE);
 114                         }
 115                         cmsg->rm_call.cb_rpcvers = IXDR_GET_U_INT32(buf);
 116                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 117                                 return (FALSE);
 118                         }
 119                         cmsg->rm_call.cb_prog = IXDR_GET_U_INT32(buf);
 120                         cmsg->rm_call.cb_vers = IXDR_GET_U_INT32(buf);
 121                         cmsg->rm_call.cb_proc = IXDR_GET_U_INT32(buf);
 122                         oa = &cmsg->rm_call.cb_cred;
 123                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 124                         oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 125                         if (oa->oa_length) {
 126                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 127                                         return (FALSE);
 128                                 }
 129                                 if (oa->oa_base == NULL) {
 130                                         oa->oa_base = (caddr_t)
 131                                             mem_alloc(oa->oa_length);
 132                                         if (oa->oa_base == NULL)
 133                                                 return (FALSE);
 134                                 }
 135                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 136                                 if (buf == NULL) {
 137                                         if (xdr_opaque(xdrs, oa->oa_base,
 138                                             oa->oa_length) == FALSE) {
 139                                                 return (FALSE);
 140                                         }
 141                                 } else {
 142                                         memmove(oa->oa_base, buf,
 143                                             oa->oa_length);
 144                                         /* no real need....
 145                                         buf += RNDUP(oa->oa_length) /
 146                                                 sizeof (int32_t);
 147                                         */
 148                                 }
 149                         }
 150                         oa = &cmsg->rm_call.cb_verf;
 151                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 152                         if (buf == NULL) {
 153                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 154                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 155                                         return (FALSE);
 156                                 }
 157                         } else {
 158                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 159                                 oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
 160                         }
 161                         if (oa->oa_length) {
 162                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 163                                         return (FALSE);
 164                                 }
 165                                 if (oa->oa_base == NULL) {
 166                                         oa->oa_base = (caddr_t)
 167                                             mem_alloc(oa->oa_length);
 168                                         if (oa->oa_base == NULL)
 169                                                 return (FALSE);
 170                                 }
 171                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 172                                 if (buf == NULL) {
 173                                         if (xdr_opaque(xdrs, oa->oa_base,
 174                                             oa->oa_length) == FALSE) {
 175                                                 return (FALSE);
 176                                         }
 177                                 } else {
 178                                         memmove(oa->oa_base, buf,
 179                                             oa->oa_length);
 180                                         /* no real need...
 181                                         buf += RNDUP(oa->oa_length) /
 182                                                 sizeof (int32_t);
 183                                         */
 184                                 }
 185                         }
 186                         return (TRUE);
 187                 }
 188         }
 189         prm_direction = &cmsg->rm_direction;
 190         if (
 191             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 192             xdr_enum(xdrs, (enum_t *) prm_direction) &&
 193             (cmsg->rm_direction == CALL) &&
 194             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 195             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 196             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 197             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 198             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 199             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 200                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 201         return (FALSE);
 202 }