/* * xdr_array.c, Generic XDR routines implementation. * * Copyright (c) 2010, Oracle America, Inc. * * 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 the "Oracle America, 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. * * 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 <stdio.h> #include <string.h> #include <rpc/types.h> #include <rpc/xdr.h> #include <libintl.h> #include <limits.h> #include <wchar.h> #define LASTUNSIGNED ((u_int)0-1) /* * 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 xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc) XDR *xdrs; caddr_t *addrp; /* array pointer */ u_int *sizep; /* number of elements */ u_int maxsize; /* max numberof elements */ u_int elsize; /* size in bytes of each element */ xdrproc_t elproc; /* xdr routine to handle each element */ { u_int i; caddr_t target = *addrp; u_int c; /* the actual element count */ bool_t stat = TRUE; /* like strings, arrays are really counted arrays */ if (!xdr_u_int (xdrs, sizep)) { return FALSE; } c = *sizep; /* * XXX: Let the overflow possibly happen with XDR_FREE because mem_free() * doesn't actually use its second argument anyway. */ if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE)) { return FALSE; } /* * 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 = calloc (c, elsize); if (target == NULL) { (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n")); return FALSE; } break; case XDR_FREE: return TRUE; default: break; } /* * now we xdr each element of array */ for (i = 0; (i < c) && stat; i++) { stat = (*elproc) (xdrs, target, LASTUNSIGNED); target += elsize; } /* * the array may need freeing */ if (xdrs->x_op == XDR_FREE) { mem_free (*addrp, c * elsize); *addrp = NULL; } return stat; } #ifdef EXPORT_RPC_SYMBOLS libc_hidden_def (xdr_array) #else libc_hidden_nolink_sunrpc (xdr_array, GLIBC_2_0) #endif /* * 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 xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem) XDR *xdrs; char *basep; u_int nelem; u_int elemsize; xdrproc_t xdr_elem; { u_int i; char *elptr; elptr = basep; for (i = 0; i < nelem; i++) { if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED)) { return FALSE; } elptr += elemsize; } return TRUE; } libc_hidden_nolink_sunrpc (xdr_vector, GLIBC_2_0)