832 lines
16 KiB
C
832 lines
16 KiB
C
/*
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* xdr.c, Generic XDR routines implementation.
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*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* These are the "generic" xdr routines used to serialize and de-serialize
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* most common data items. See xdr.h for more info on the interface to
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* xdr.
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*/
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#include <stdio.h>
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#include <limits.h>
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#include <string.h>
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#include <libintl.h>
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#include <wchar.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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/*
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* constants specific to the xdr "protocol"
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*/
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#define XDR_FALSE ((long) 0)
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#define XDR_TRUE ((long) 1)
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#define LASTUNSIGNED ((u_int) 0-1)
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/*
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* for unit alignment
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*/
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static const char xdr_zero[BYTES_PER_XDR_UNIT] = {0, 0, 0, 0};
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/*
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* Free a data structure using XDR
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* Not a filter, but a convenient utility nonetheless
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*/
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void
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xdr_free (xdrproc_t proc, char *objp)
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{
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XDR x;
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x.x_op = XDR_FREE;
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(*proc) (&x, objp);
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_free)
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#else
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libc_hidden_nolink_sunrpc (xdr_free, GLIBC_2_0)
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#endif
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/*
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* XDR nothing
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*/
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bool_t
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xdr_void (void)
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{
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return TRUE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_void)
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#else
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libc_hidden_nolink_sunrpc (xdr_void, GLIBC_2_0)
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#endif
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/*
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* XDR integers
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*/
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bool_t
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xdr_int (XDR *xdrs, int *ip)
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{
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#if INT_MAX < LONG_MAX
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long l;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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l = (long) *ip;
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return XDR_PUTLONG (xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &l))
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{
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return FALSE;
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}
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*ip = (int) l;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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#elif INT_MAX == LONG_MAX
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return xdr_long (xdrs, (long *) ip);
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#elif INT_MAX == SHRT_MAX
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return xdr_short (xdrs, (short *) ip);
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#else
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#error unexpected integer sizes in_xdr_int()
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#endif
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_int)
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#else
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libc_hidden_nolink_sunrpc (xdr_int, GLIBC_2_0)
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#endif
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/*
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* XDR unsigned integers
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*/
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bool_t
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xdr_u_int (XDR *xdrs, u_int *up)
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{
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#if UINT_MAX < ULONG_MAX
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long l;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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l = (u_long) * up;
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return XDR_PUTLONG (xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &l))
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{
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return FALSE;
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}
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*up = (u_int) (u_long) l;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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#elif UINT_MAX == ULONG_MAX
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return xdr_u_long (xdrs, (u_long *) up);
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#elif UINT_MAX == USHRT_MAX
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return xdr_short (xdrs, (short *) up);
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#else
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#error unexpected integer sizes in_xdr_u_int()
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#endif
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_int)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_int, GLIBC_2_0)
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#endif
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/*
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* XDR long integers
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* The definition of xdr_long() is kept for backward
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* compatibility. Instead xdr_int() should be used.
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*/
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bool_t
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xdr_long (XDR *xdrs, long *lp)
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{
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if (xdrs->x_op == XDR_ENCODE
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&& (sizeof (int32_t) == sizeof (long)
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|| (int32_t) *lp == *lp))
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return XDR_PUTLONG (xdrs, lp);
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if (xdrs->x_op == XDR_DECODE)
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return XDR_GETLONG (xdrs, lp);
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if (xdrs->x_op == XDR_FREE)
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return TRUE;
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_long)
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#else
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libc_hidden_nolink_sunrpc (xdr_long, GLIBC_2_0)
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#endif
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/*
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* XDR unsigned long integers
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* The definition of xdr_u_long() is kept for backward
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* compatibility. Instead xdr_u_int() should be used.
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*/
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bool_t
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xdr_u_long (XDR *xdrs, u_long *ulp)
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{
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switch (xdrs->x_op)
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{
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case XDR_DECODE:
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{
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long int tmp;
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if (XDR_GETLONG (xdrs, &tmp) == FALSE)
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return FALSE;
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*ulp = (uint32_t) tmp;
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return TRUE;
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}
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case XDR_ENCODE:
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if (sizeof (uint32_t) != sizeof (u_long)
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&& (uint32_t) *ulp != *ulp)
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return FALSE;
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return XDR_PUTLONG (xdrs, (long *) ulp);
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_long)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_long, GLIBC_2_0)
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#endif
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/*
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* XDR hyper integers
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* same as xdr_u_hyper - open coded to save a proc call!
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*/
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bool_t
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xdr_hyper (XDR *xdrs, quad_t *llp)
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{
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long int t1, t2;
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if (xdrs->x_op == XDR_ENCODE)
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{
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t1 = (long) ((*llp) >> 32);
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t2 = (long) (*llp);
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return (XDR_PUTLONG(xdrs, &t1) && XDR_PUTLONG(xdrs, &t2));
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}
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if (xdrs->x_op == XDR_DECODE)
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{
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if (!XDR_GETLONG(xdrs, &t1) || !XDR_GETLONG(xdrs, &t2))
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return FALSE;
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*llp = ((quad_t) t1) << 32;
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*llp |= (uint32_t) t2;
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return TRUE;
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}
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if (xdrs->x_op == XDR_FREE)
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return TRUE;
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_hyper)
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#else
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libc_hidden_nolink_sunrpc (xdr_hyper, GLIBC_2_1_1)
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#endif
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/*
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* XDR hyper integers
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* same as xdr_hyper - open coded to save a proc call!
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*/
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bool_t
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xdr_u_hyper (XDR *xdrs, u_quad_t *ullp)
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{
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long int t1, t2;
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if (xdrs->x_op == XDR_ENCODE)
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{
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t1 = (unsigned long) ((*ullp) >> 32);
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t2 = (unsigned long) (*ullp);
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return (XDR_PUTLONG(xdrs, &t1) && XDR_PUTLONG(xdrs, &t2));
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}
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if (xdrs->x_op == XDR_DECODE)
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{
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if (!XDR_GETLONG(xdrs, &t1) || !XDR_GETLONG(xdrs, &t2))
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return FALSE;
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*ullp = ((u_quad_t) t1) << 32;
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*ullp |= (uint32_t) t2;
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return TRUE;
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}
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if (xdrs->x_op == XDR_FREE)
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return TRUE;
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_hyper)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_hyper, GLIBC_2_1_1)
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#endif
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bool_t
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xdr_longlong_t (XDR *xdrs, quad_t *llp)
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{
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return xdr_hyper (xdrs, llp);
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_longlong_t)
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#else
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libc_hidden_nolink_sunrpc (xdr_longlong_t, GLIBC_2_1_1)
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#endif
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bool_t
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xdr_u_longlong_t (XDR *xdrs, u_quad_t *ullp)
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{
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return xdr_u_hyper (xdrs, ullp);
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_longlong_t)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_longlong_t, GLIBC_2_1_1)
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#endif
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/*
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* XDR short integers
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*/
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bool_t
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xdr_short (XDR *xdrs, short *sp)
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{
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long l;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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l = (long) *sp;
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return XDR_PUTLONG (xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &l))
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{
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return FALSE;
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}
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*sp = (short) l;
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return TRUE;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_short)
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#else
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libc_hidden_nolink_sunrpc (xdr_short, GLIBC_2_0)
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#endif
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/*
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* XDR unsigned short integers
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*/
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bool_t
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xdr_u_short (XDR *xdrs, u_short *usp)
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{
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long l;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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l = (u_long) * usp;
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return XDR_PUTLONG (xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &l))
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{
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return FALSE;
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}
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*usp = (u_short) (u_long) l;
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return TRUE;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_short)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_short, GLIBC_2_0)
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#endif
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/*
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* XDR a char
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*/
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bool_t
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xdr_char (XDR *xdrs, char *cp)
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{
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int i;
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i = (*cp);
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if (!xdr_int (xdrs, &i))
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{
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return FALSE;
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}
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*cp = i;
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return TRUE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_char)
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#else
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libc_hidden_nolink_sunrpc (xdr_char, GLIBC_2_0)
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#endif
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/*
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* XDR an unsigned char
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*/
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bool_t
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xdr_u_char (XDR *xdrs, u_char *cp)
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{
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u_int u;
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u = (*cp);
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if (!xdr_u_int (xdrs, &u))
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{
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return FALSE;
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}
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*cp = u;
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return TRUE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_u_char)
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#else
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libc_hidden_nolink_sunrpc (xdr_u_char, GLIBC_2_0)
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#endif
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/*
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* XDR booleans
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*/
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bool_t
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xdr_bool (XDR *xdrs, bool_t *bp)
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{
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long lb;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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lb = *bp ? XDR_TRUE : XDR_FALSE;
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return XDR_PUTLONG (xdrs, &lb);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &lb))
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{
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return FALSE;
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}
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*bp = (lb == XDR_FALSE) ? FALSE : TRUE;
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return TRUE;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_bool)
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#else
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libc_hidden_nolink_sunrpc (xdr_bool, GLIBC_2_0)
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#endif
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/*
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* XDR enumerations
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*/
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bool_t
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xdr_enum (XDR *xdrs, enum_t *ep)
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{
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enum sizecheck
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{
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SIZEVAL
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}; /* used to find the size of an enum */
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/*
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* enums are treated as ints
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*/
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if (sizeof (enum sizecheck) == 4)
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{
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#if INT_MAX < LONG_MAX
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long l;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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l = *ep;
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return XDR_PUTLONG (xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &l))
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{
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return FALSE;
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}
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*ep = l;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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#else
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return xdr_long (xdrs, (long *) ep);
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#endif
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}
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else if (sizeof (enum sizecheck) == sizeof (short))
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{
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return xdr_short (xdrs, (short *) ep);
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}
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else
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{
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return FALSE;
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}
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (xdr_enum)
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#else
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libc_hidden_nolink_sunrpc (xdr_enum, GLIBC_2_0)
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#endif
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/*
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* XDR opaque data
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* Allows the specification of a fixed size sequence of opaque bytes.
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* cp points to the opaque object and cnt gives the byte length.
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*/
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bool_t
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xdr_opaque (XDR *xdrs, caddr_t cp, u_int cnt)
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{
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u_int rndup;
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static char crud[BYTES_PER_XDR_UNIT];
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/*
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* if no data we are done
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*/
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if (cnt == 0)
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return TRUE;
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/*
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* round byte count to full xdr units
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*/
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rndup = cnt % BYTES_PER_XDR_UNIT;
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if (rndup > 0)
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rndup = BYTES_PER_XDR_UNIT - rndup;
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switch (xdrs->x_op)
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{
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case XDR_DECODE:
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if (!XDR_GETBYTES (xdrs, cp, cnt))
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{
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return FALSE;
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}
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if (rndup == 0)
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return TRUE;
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return XDR_GETBYTES (xdrs, (caddr_t)crud, rndup);
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case XDR_ENCODE:
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if (!XDR_PUTBYTES (xdrs, cp, cnt))
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{
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return FALSE;
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}
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if (rndup == 0)
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return TRUE;
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return XDR_PUTBYTES (xdrs, xdr_zero, rndup);
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|
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case XDR_FREE:
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (xdr_opaque)
|
|
#else
|
|
libc_hidden_nolink_sunrpc (xdr_opaque, GLIBC_2_0)
|
|
#endif
|
|
|
|
/*
|
|
* XDR counted bytes
|
|
* *cpp is a pointer to the bytes, *sizep is the count.
|
|
* If *cpp is NULL maxsize bytes are allocated
|
|
*/
|
|
bool_t
|
|
xdr_bytes (xdrs, cpp, sizep, maxsize)
|
|
XDR *xdrs;
|
|
char **cpp;
|
|
u_int *sizep;
|
|
u_int maxsize;
|
|
{
|
|
char *sp = *cpp; /* sp is the actual string pointer */
|
|
u_int nodesize;
|
|
|
|
/*
|
|
* first deal with the length since xdr bytes are counted
|
|
*/
|
|
if (!xdr_u_int (xdrs, sizep))
|
|
{
|
|
return FALSE;
|
|
}
|
|
nodesize = *sizep;
|
|
if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* now deal with the actual bytes
|
|
*/
|
|
switch (xdrs->x_op)
|
|
{
|
|
case XDR_DECODE:
|
|
if (nodesize == 0)
|
|
{
|
|
return TRUE;
|
|
}
|
|
if (sp == NULL)
|
|
{
|
|
*cpp = sp = (char *) mem_alloc (nodesize);
|
|
}
|
|
if (sp == NULL)
|
|
{
|
|
(void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
|
|
return FALSE;
|
|
}
|
|
/* fall into ... */
|
|
|
|
case XDR_ENCODE:
|
|
return xdr_opaque (xdrs, sp, nodesize);
|
|
|
|
case XDR_FREE:
|
|
if (sp != NULL)
|
|
{
|
|
mem_free (sp, nodesize);
|
|
*cpp = NULL;
|
|
}
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (xdr_bytes)
|
|
#else
|
|
libc_hidden_nolink_sunrpc (xdr_bytes, GLIBC_2_0)
|
|
#endif
|
|
|
|
/*
|
|
* Implemented here due to commonality of the object.
|
|
*/
|
|
bool_t
|
|
xdr_netobj (xdrs, np)
|
|
XDR *xdrs;
|
|
struct netobj *np;
|
|
{
|
|
|
|
return xdr_bytes (xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ);
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (xdr_netobj)
|
|
#else
|
|
libc_hidden_nolink_sunrpc (xdr_netobj, GLIBC_2_0)
|
|
#endif
|
|
|
|
/*
|
|
* XDR a discriminated union
|
|
* Support routine for discriminated unions.
|
|
* You create an array of xdrdiscrim structures, terminated with
|
|
* an entry with a null procedure pointer. The routine gets
|
|
* the discriminant value and then searches the array of xdrdiscrims
|
|
* looking for that value. It calls the procedure given in the xdrdiscrim
|
|
* to handle the discriminant. If there is no specific routine a default
|
|
* routine may be called.
|
|
* If there is no specific or default routine an error is returned.
|
|
*/
|
|
bool_t
|
|
xdr_union (xdrs, dscmp, unp, choices, dfault)
|
|
XDR *xdrs;
|
|
enum_t *dscmp; /* enum to decide which arm to work on */
|
|
char *unp; /* the union itself */
|
|
const struct xdr_discrim *choices; /* [value, xdr proc] for each arm */
|
|
xdrproc_t dfault; /* default xdr routine */
|
|
{
|
|
enum_t dscm;
|
|
|
|
/*
|
|
* we deal with the discriminator; it's an enum
|
|
*/
|
|
if (!xdr_enum (xdrs, dscmp))
|
|
{
|
|
return FALSE;
|
|
}
|
|
dscm = *dscmp;
|
|
|
|
/*
|
|
* search choices for a value that matches the discriminator.
|
|
* if we find one, execute the xdr routine for that value.
|
|
*/
|
|
for (; choices->proc != NULL_xdrproc_t; choices++)
|
|
{
|
|
if (choices->value == dscm)
|
|
return (*(choices->proc)) (xdrs, unp, LASTUNSIGNED);
|
|
}
|
|
|
|
/*
|
|
* no match - execute the default xdr routine if there is one
|
|
*/
|
|
return ((dfault == NULL_xdrproc_t) ? FALSE :
|
|
(*dfault) (xdrs, unp, LASTUNSIGNED));
|
|
}
|
|
libc_hidden_nolink_sunrpc (xdr_union, GLIBC_2_0)
|
|
|
|
|
|
/*
|
|
* Non-portable xdr primitives.
|
|
* Care should be taken when moving these routines to new architectures.
|
|
*/
|
|
|
|
|
|
/*
|
|
* XDR null terminated ASCII strings
|
|
* xdr_string deals with "C strings" - arrays of bytes that are
|
|
* terminated by a NULL character. The parameter cpp references a
|
|
* pointer to storage; If the pointer is null, then the necessary
|
|
* storage is allocated. The last parameter is the max allowed length
|
|
* of the string as specified by a protocol.
|
|
*/
|
|
bool_t
|
|
xdr_string (xdrs, cpp, maxsize)
|
|
XDR *xdrs;
|
|
char **cpp;
|
|
u_int maxsize;
|
|
{
|
|
char *sp = *cpp; /* sp is the actual string pointer */
|
|
u_int size;
|
|
u_int nodesize;
|
|
|
|
/*
|
|
* first deal with the length since xdr strings are counted-strings
|
|
*/
|
|
switch (xdrs->x_op)
|
|
{
|
|
case XDR_FREE:
|
|
if (sp == NULL)
|
|
{
|
|
return TRUE; /* already free */
|
|
}
|
|
/* fall through... */
|
|
case XDR_ENCODE:
|
|
if (sp == NULL)
|
|
return FALSE;
|
|
size = strlen (sp);
|
|
break;
|
|
case XDR_DECODE:
|
|
break;
|
|
}
|
|
if (!xdr_u_int (xdrs, &size))
|
|
{
|
|
return FALSE;
|
|
}
|
|
if (size > maxsize)
|
|
{
|
|
return FALSE;
|
|
}
|
|
nodesize = size + 1;
|
|
if (nodesize == 0)
|
|
{
|
|
/* This means an overflow. It a bug in the caller which
|
|
provided a too large maxsize but nevertheless catch it
|
|
here. */
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* now deal with the actual bytes
|
|
*/
|
|
switch (xdrs->x_op)
|
|
{
|
|
case XDR_DECODE:
|
|
if (sp == NULL)
|
|
*cpp = sp = (char *) mem_alloc (nodesize);
|
|
if (sp == NULL)
|
|
{
|
|
(void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
|
|
return FALSE;
|
|
}
|
|
sp[size] = 0;
|
|
/* fall into ... */
|
|
|
|
case XDR_ENCODE:
|
|
return xdr_opaque (xdrs, sp, size);
|
|
|
|
case XDR_FREE:
|
|
mem_free (sp, nodesize);
|
|
*cpp = NULL;
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (xdr_string)
|
|
#else
|
|
libc_hidden_nolink_sunrpc (xdr_string, GLIBC_2_0)
|
|
#endif
|
|
|
|
/*
|
|
* Wrapper for xdr_string that can be called directly from
|
|
* routines like clnt_call
|
|
*/
|
|
bool_t
|
|
xdr_wrapstring (xdrs, cpp)
|
|
XDR *xdrs;
|
|
char **cpp;
|
|
{
|
|
if (xdr_string (xdrs, cpp, LASTUNSIGNED))
|
|
{
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (xdr_wrapstring)
|
|
#else
|
|
libc_hidden_nolink_sunrpc (xdr_wrapstring, GLIBC_2_0)
|
|
#endif
|