external/cddl/osnet/sys/rpc/xdr.h

   1 /*      $NetBSD: xdr.h,v 1.1 2009/03/26 22:11:46 ad Exp $       */
   2
   3 /*
   4  * CDDL HEADER START
   5  *
   6  * The contents of this file are subject to the terms of the
   7  * Common Development and Distribution License, Version 1.0 only
   8  * (the "License").  You may not use this file except in compliance
   9  * with the License.
  10  *
  11  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  12  * or http://www.opensolaris.org/os/licensing.
  13  * See the License for the specific language governing permissions
  14  * and limitations under the License.
  15  *
  16  * When distributing Covered Code, include this CDDL HEADER in each
  17  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  18  * If applicable, add the following below this CDDL HEADER, with the
  19  * fields enclosed by brackets "[]" replaced with your own identifying
  20  * information: Portions Copyright [yyyy] [name of copyright owner]
  21  *
  22  * CDDL HEADER END
  23  */
  24 /*
  25  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  30 /*        All Rights Reserved   */
  31
  32 /*
  33  * Portions of this source code were derived from Berkeley 4.3 BSD
  34  * under license from the Regents of the University of California.
  35  */
  36
  37 #ifndef _OPENSOLARIS_RPC_XDR_H_
  38 #define _OPENSOLARIS_RPC_XDR_H_
  39
  40 #include_next <rpc/xdr.h>
  41
  42 #ifndef _KERNEL
  43 #include_next <rpc/xdr.h>
  44
  45 /*
  46  * Strangely, my glibc version (2.3.6) doesn't have xdr_control(), so
  47  * we have to hack it in here (source taken from OpenSolaris).
  48  * By the way, it is assumed the xdrmem implementation is used.
  49  */
  50
  51 #undef xdr_control
  52 #define xdr_control(a,b,c) xdrmem_control(a,b,c)
  53
  54 /*
  55  * These are the request arguments to XDR_CONTROL.
  56  *
  57  * XDR_PEEK - returns the contents of the next XDR unit on the XDR stream.
  58  * XDR_SKIPBYTES - skips the next N bytes in the XDR stream.
  59  * XDR_RDMAGET - for xdr implementation over RDMA, gets private flags from
  60  *               the XDR stream being moved over RDMA
  61  * XDR_RDMANOCHUNK - for xdr implementaion over RDMA, sets private flags in
  62  *                   the XDR stream moving over RDMA.
  63  */
  64 #define XDR_PEEK      2
  65 #define XDR_SKIPBYTES 3
  66 #define XDR_RDMAGET   4
  67 #define XDR_RDMASET   5
  68
  69 /* FIXME: probably doesn't work */
  70 static __inline bool_t
  71 xdrmem_control(XDR *xdrs, int request, void *info)
  72 {
  73         xdr_bytesrec *xptr;
  74         int32_t *int32p;
  75         int len;
  76
  77         switch (request) {
  78
  79         case XDR_GET_BYTES_AVAIL:
  80                 xptr = (xdr_bytesrec *)info;
  81                 xptr->xc_is_last_record = TRUE;
  82                 xptr->xc_num_avail = xdrs->x_handy;
  83                 return (TRUE);
  84
  85         case XDR_PEEK:
  86                 /*
  87                  * Return the next 4 byte unit in the XDR stream.
  88                  */
  89                 if (xdrs->x_handy < sizeof (int32_t))
  90                         return (FALSE);
  91                 int32p = (int32_t *)info;
  92                 *int32p = (int32_t)ntohl((uint32_t)
  93                     (*((int32_t *)(xdrs->x_private))));
  94                 return (TRUE);
  95
  96         case XDR_SKIPBYTES:
  97                 /*
  98                  * Skip the next N bytes in the XDR stream.
  99                  */
 100                 int32p = (int32_t *)info;
 101                 len = RNDUP((int)(*int32p));
 102                 if ((xdrs->x_handy -= len) < 0)
 103                         return (FALSE);
 104                 xdrs->x_private += len;
 105                 return (TRUE);
 106
 107         }
 108         return (FALSE);
 109 }
 110 #endif  /* !_KERNEL */
 111
 112 #endif  /* !_OPENSOLARIS_RPC_XDR_H_ */