/* $NetBSD: xdr_mem.c,v 1.2 2019/06/05 16:25:43 hannken Exp $ */ /* * 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. */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char *sccsid = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; #else __RCSID("$NetBSD: xdr_mem.c,v 1.2 2019/06/05 16:25:43 hannken Exp $"); #endif #endif /* * xdr_mem.h, XDR implementation using memory buffers. * * Copyright (C) 1984, Sun Microsystems, Inc. * * If you have some data to be interpreted as external data representation * or to be converted to external data representation in a memory buffer, * then this is the package for you. * */ #if defined(_KERNEL) || defined(_STANDALONE) #include #include #include #else /* _KERNEL || _STANDALONE */ #include "namespace.h" #include #include #include #include #include #ifdef __weak_alias __weak_alias(xdrmem_create,_xdrmem_create) #endif #endif /* _KERNEL || _STANDALONE */ static void xdrmem_destroy(XDR *); static bool_t xdrmem_getlong_aligned(XDR *, long *); static bool_t xdrmem_putlong_aligned(XDR *, const long *); static bool_t xdrmem_getlong_unaligned(XDR *, long *); static bool_t xdrmem_putlong_unaligned(XDR *, const long *); static bool_t xdrmem_getbytes(XDR *, char *, u_int); static bool_t xdrmem_putbytes(XDR *, const char *, u_int); /* XXX: w/64-bit pointers, u_int not enough! */ static u_int xdrmem_getpos(XDR *); static bool_t xdrmem_setpos(XDR *, u_int); static int32_t *xdrmem_inline_aligned(XDR *, u_int); static int32_t *xdrmem_inline_unaligned(XDR *, u_int); static bool_t xdrmem_control(XDR *xdrs, int request, void *info); static const struct xdr_ops xdrmem_ops_aligned = { xdrmem_getlong_aligned, xdrmem_putlong_aligned, xdrmem_getbytes, xdrmem_putbytes, xdrmem_getpos, xdrmem_setpos, xdrmem_inline_aligned, xdrmem_destroy, xdrmem_control }; static const struct xdr_ops xdrmem_ops_unaligned = { xdrmem_getlong_unaligned, xdrmem_putlong_unaligned, xdrmem_getbytes, xdrmem_putbytes, xdrmem_getpos, xdrmem_setpos, xdrmem_inline_unaligned, xdrmem_destroy, xdrmem_control }; /* * The procedure xdrmem_create initializes a stream descriptor for a * memory buffer. */ void xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) { xdrs->x_op = op; xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; xdrs->x_private = xdrs->x_base = addr; xdrs->x_handy = size; } /*ARGSUSED*/ static void xdrmem_destroy(XDR *xdrs) { } static bool_t xdrmem_getlong_aligned(XDR *xdrs, long *lp) { if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); *lp = ntohl(*(u_int32_t *)xdrs->x_private); xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); return (TRUE); } static bool_t xdrmem_putlong_aligned(XDR *xdrs, const long *lp) { if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); return (TRUE); } static bool_t xdrmem_getlong_unaligned(XDR *xdrs, long *lp) { u_int32_t l; if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); memmove(&l, xdrs->x_private, sizeof(int32_t)); *lp = ntohl(l); xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); return (TRUE); } static bool_t xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) { u_int32_t l; if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); l = htonl((u_int32_t)*lp); memmove(xdrs->x_private, &l, sizeof(int32_t)); xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); return (TRUE); } static bool_t xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) { if (xdrs->x_handy < len) return (FALSE); xdrs->x_handy -= len; memmove(addr, xdrs->x_private, len); xdrs->x_private = (char *)xdrs->x_private + len; return (TRUE); } static bool_t xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) { if (xdrs->x_handy < len) return (FALSE); xdrs->x_handy -= len; memmove(xdrs->x_private, addr, len); xdrs->x_private = (char *)xdrs->x_private + len; return (TRUE); } static u_int xdrmem_getpos(XDR *xdrs) { /* XXX w/64-bit pointers, u_int not enough! */ return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); } static bool_t xdrmem_setpos(XDR *xdrs, u_int pos) { char *newaddr = xdrs->x_base + pos; char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; if ((long)newaddr > (long)lastaddr) return (FALSE); xdrs->x_private = newaddr; xdrs->x_handy = (int)((long)lastaddr - (long)newaddr); return (TRUE); } static int32_t * xdrmem_inline_aligned(XDR *xdrs, u_int len) { int32_t *buf = 0; if (xdrs->x_handy >= len) { xdrs->x_handy -= len; buf = (int32_t *)xdrs->x_private; xdrs->x_private = (char *)xdrs->x_private + len; } return (buf); } /* ARGSUSED */ static int32_t * xdrmem_inline_unaligned(XDR *xdrs, u_int len) { return (0); } static bool_t xdrmem_control(XDR *xdrs, int request, void *info) { xdr_bytesrec *xptr; switch (request) { case XDR_GET_BYTES_AVAIL: xptr = (xdr_bytesrec *)info; xptr->xc_is_last_record = TRUE; xptr->xc_num_avail = xdrs->x_handy; return (TRUE); } return (FALSE); }