/* * Copyright (c) 2009, Sun Microsystems, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * - Neither the name of Sun Microsystems, Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * xdr_array.c, Generic XDR routines impelmentation. * * Copyright (C) 1984, Sun Microsystems, Inc. * * These are the "non-trivial" xdr primitives used to serialize and de-serialize * arrays. See xdr.h for more info on the interface to xdr. */ #include <limits.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <rpc/types.h> #include <rpc/xdr.h> #include "xdr_private.h" /* * XDR an array of arbitrary elements * *addrp is a pointer to the array, *sizep is the number of elements. * If addrp is NULL (*sizep * elsize) bytes are allocated. * elsize is the size (in bytes) of each element, and elproc is the * xdr procedure to call to handle each element of the array. */ bool_t _DEFUN (xdr_array, (xdrs, addrp, sizep, maxsize, elsize, elproc), XDR * xdrs _AND caddr_t * addrp _AND u_int * sizep _AND u_int maxsize _AND u_int elsize _AND xdrproc_t elproc) { u_int i; caddr_t target = *addrp; u_int c; /* the actual element count */ bool_t stat = TRUE; u_int nodesize; /* like strings, arrays are really counted arrays */ if (!xdr_u_int (xdrs, sizep)) { return FALSE; } c = *sizep; if ((c > maxsize || UINT_MAX / elsize < c) && (xdrs->x_op != XDR_FREE)) { return FALSE; } nodesize = c * elsize; /* * if we are deserializing, we may need to allocate an array. * We also save time by checking for a null array if we are freeing. */ if (target == NULL) switch (xdrs->x_op) { case XDR_DECODE: if (c == 0) return TRUE; *addrp = target = mem_alloc (nodesize); if (target == NULL) { xdr_warnx ("xdr_array: out of memory"); errno = ENOMEM; return FALSE; } memset (target, 0, nodesize); break; case XDR_FREE: return TRUE; case XDR_ENCODE: break; } /* * now we xdr each element of array */ for (i = 0; (i < c) && stat; i++) { stat = (*elproc) (xdrs, target); target += elsize; } /* * the array may need freeing */ if (xdrs->x_op == XDR_FREE) { mem_free (*addrp, nodesize); *addrp = NULL; } return (stat); } /* * xdr_vector(): * * XDR a fixed length array. Unlike variable-length arrays, * the storage of fixed length arrays is static and unfreeable. * > basep: base of the array * > size: size of the array * > elemsize: size of each element * > xdr_elem: routine to XDR each element */ bool_t _DEFUN (xdr_vector, (xdrs, basep, nelem, elemsize, xdr_elem), XDR * xdrs _AND char *basep _AND u_int nelem _AND u_int elemsize _AND xdrproc_t xdr_elem) { u_int i; char *elptr; elptr = basep; for (i = 0; i < nelem; i++) { if (!(*xdr_elem) (xdrs, elptr)) { return FALSE; } elptr += elemsize; } return TRUE; }