xdr_mem.c revision 297790
1244971Sjkim/* $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ */ 2244971Sjkim 3244971Sjkim/*- 4244971Sjkim * Copyright (c) 2010, Oracle America, Inc. 5244971Sjkim * 6244971Sjkim * Redistribution and use in source and binary forms, with or without 7244971Sjkim * modification, are permitted provided that the following conditions are 8298714Sjkim * met: 9244971Sjkim * 10244971Sjkim * * Redistributions of source code must retain the above copyright 11244971Sjkim * notice, this list of conditions and the following disclaimer. 12244971Sjkim * * Redistributions in binary form must reproduce the above 13244971Sjkim * copyright notice, this list of conditions and the following 14244971Sjkim * disclaimer in the documentation and/or other materials 15244971Sjkim * provided with the distribution. 16244971Sjkim * * Neither the name of the "Oracle America, Inc." nor the names of its 17244971Sjkim * contributors may be used to endorse or promote products derived 18244971Sjkim * from this software without specific prior written permission. 19244971Sjkim * 20244971Sjkim * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21244971Sjkim * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22244971Sjkim * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23244971Sjkim * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24244971Sjkim * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25244971Sjkim * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26244971Sjkim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27244971Sjkim * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28244971Sjkim * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29244971Sjkim * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30244971Sjkim * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31244971Sjkim * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32244971Sjkim */ 33244971Sjkim 34244971Sjkim#if defined(LIBC_SCCS) && !defined(lint) 35244971Sjkimstatic char *sccsid2 = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; 36244971Sjkimstatic char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; 37244971Sjkim#endif 38244971Sjkim#include <sys/cdefs.h> 39244971Sjkim__FBSDID("$FreeBSD: head/lib/libc/xdr/xdr_mem.c 297790 2016-04-10 19:33:58Z pfg $"); 40244971Sjkim 41244971Sjkim/* 42244971Sjkim * xdr_mem.h, XDR implementation using memory buffers. 43244971Sjkim * 44245582Sjkim * If you have some data to be interpreted as external data representation 45245582Sjkim * or to be converted to external data representation in a memory buffer, 46245582Sjkim * then this is the package for you. 47245582Sjkim * 48244971Sjkim */ 49244971Sjkim 50244971Sjkim#include "namespace.h" 51244971Sjkim#include <sys/types.h> 52244971Sjkim 53244971Sjkim#include <netinet/in.h> 54244971Sjkim 55244971Sjkim#include <string.h> 56244971Sjkim 57244971Sjkim#include <rpc/types.h> 58244971Sjkim#include <rpc/xdr.h> 59244971Sjkim#include "un-namespace.h" 60244971Sjkim 61244971Sjkimstatic void xdrmem_destroy(XDR *); 62244971Sjkimstatic bool_t xdrmem_getlong_aligned(XDR *, long *); 63244971Sjkimstatic bool_t xdrmem_putlong_aligned(XDR *, const long *); 64244971Sjkimstatic bool_t xdrmem_getlong_unaligned(XDR *, long *); 65244971Sjkimstatic bool_t xdrmem_putlong_unaligned(XDR *, const long *); 66244971Sjkimstatic bool_t xdrmem_getbytes(XDR *, char *, u_int); 67244971Sjkimstatic bool_t xdrmem_putbytes(XDR *, const char *, u_int); 68244971Sjkim/* XXX: w/64-bit pointers, u_int not enough! */ 69244971Sjkimstatic u_int xdrmem_getpos(XDR *); 70244971Sjkimstatic bool_t xdrmem_setpos(XDR *, u_int); 71244971Sjkimstatic int32_t *xdrmem_inline_aligned(XDR *, u_int); 72244971Sjkimstatic int32_t *xdrmem_inline_unaligned(XDR *, u_int); 73244971Sjkim 74244971Sjkimstatic const struct xdr_ops xdrmem_ops_aligned = { 75244971Sjkim xdrmem_getlong_aligned, 76285797Sjkim xdrmem_putlong_aligned, 77244971Sjkim xdrmem_getbytes, 78285797Sjkim xdrmem_putbytes, 79244971Sjkim xdrmem_getpos, 80244971Sjkim xdrmem_setpos, 81244971Sjkim xdrmem_inline_aligned, 82285797Sjkim xdrmem_destroy 83244971Sjkim}; 84244971Sjkim 85244971Sjkimstatic const struct xdr_ops xdrmem_ops_unaligned = { 86244971Sjkim xdrmem_getlong_unaligned, 87244971Sjkim xdrmem_putlong_unaligned, 88244971Sjkim xdrmem_getbytes, 89244971Sjkim xdrmem_putbytes, 90244971Sjkim xdrmem_getpos, 91244971Sjkim xdrmem_setpos, 92244971Sjkim xdrmem_inline_unaligned, 93244971Sjkim xdrmem_destroy 94244971Sjkim}; 95244971Sjkim 96244971Sjkim/* 97244971Sjkim * The procedure xdrmem_create initializes a stream descriptor for a 98244971Sjkim * memory buffer. 99244971Sjkim */ 100244971Sjkimvoid 101244971Sjkimxdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) 102244971Sjkim{ 103244971Sjkim 104244971Sjkim xdrs->x_op = op; 105244971Sjkim xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 106244971Sjkim ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 107244971Sjkim xdrs->x_private = xdrs->x_base = addr; 108244971Sjkim xdrs->x_handy = size; 109244971Sjkim} 110244971Sjkim 111285797Sjkim/*ARGSUSED*/ 112298714Sjkimstatic void 113285797Sjkimxdrmem_destroy(XDR *xdrs) 114244971Sjkim{ 115244971Sjkim 116244971Sjkim} 117285797Sjkim 118244971Sjkimstatic bool_t 119244971Sjkimxdrmem_getlong_aligned(XDR *xdrs, long *lp) 120244971Sjkim{ 121244971Sjkim 122244971Sjkim if (xdrs->x_handy < sizeof(int32_t)) 123244971Sjkim return (FALSE); 124244971Sjkim xdrs->x_handy -= sizeof(int32_t); 125244971Sjkim *lp = ntohl(*(u_int32_t *)xdrs->x_private); 126244971Sjkim xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 127244971Sjkim return (TRUE); 128244971Sjkim} 129285797Sjkim 130244971Sjkimstatic bool_t 131244971Sjkimxdrmem_putlong_aligned(XDR *xdrs, const long *lp) 132244971Sjkim{ 133244971Sjkim 134244971Sjkim if (xdrs->x_handy < sizeof(int32_t)) 135285797Sjkim return (FALSE); 136244971Sjkim xdrs->x_handy -= sizeof(int32_t); 137244971Sjkim *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); 138244971Sjkim xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 139244971Sjkim return (TRUE); 140244971Sjkim} 141244971Sjkim 142244971Sjkimstatic bool_t 143244971Sjkimxdrmem_getlong_unaligned(XDR *xdrs, long *lp) 144244971Sjkim{ 145244971Sjkim u_int32_t l; 146244971Sjkim 147244971Sjkim if (xdrs->x_handy < sizeof(int32_t)) 148244971Sjkim return (FALSE); 149244971Sjkim xdrs->x_handy -= sizeof(int32_t); 150244971Sjkim memmove(&l, xdrs->x_private, sizeof(int32_t)); 151244971Sjkim *lp = ntohl(l); 152244971Sjkim xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 153244971Sjkim return (TRUE); 154298714Sjkim} 155298714Sjkim 156244971Sjkimstatic bool_t 157244971Sjkimxdrmem_putlong_unaligned(XDR *xdrs, const long *lp) 158244971Sjkim{ 159244971Sjkim u_int32_t l; 160244971Sjkim 161244971Sjkim if (xdrs->x_handy < sizeof(int32_t)) 162244971Sjkim return (FALSE); 163244971Sjkim xdrs->x_handy -= sizeof(int32_t); 164244971Sjkim l = htonl((u_int32_t)*lp); 165244971Sjkim memmove(xdrs->x_private, &l, sizeof(int32_t)); 166244971Sjkim xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 167244971Sjkim return (TRUE); 168244971Sjkim} 169244971Sjkim 170244971Sjkimstatic bool_t 171244971Sjkimxdrmem_getbytes(XDR *xdrs, char *addr, u_int len) 172244971Sjkim{ 173244971Sjkim 174244971Sjkim if (xdrs->x_handy < len) 175244971Sjkim return (FALSE); 176244971Sjkim xdrs->x_handy -= len; 177244971Sjkim memmove(addr, xdrs->x_private, len); 178244971Sjkim xdrs->x_private = (char *)xdrs->x_private + len; 179244971Sjkim return (TRUE); 180244971Sjkim} 181244971Sjkim 182244971Sjkimstatic bool_t 183244971Sjkimxdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) 184244971Sjkim{ 185244971Sjkim 186244971Sjkim if (xdrs->x_handy < len) 187244971Sjkim return (FALSE); 188244971Sjkim xdrs->x_handy -= len; 189244971Sjkim memmove(xdrs->x_private, addr, len); 190244971Sjkim xdrs->x_private = (char *)xdrs->x_private + len; 191244971Sjkim return (TRUE); 192244971Sjkim} 193244971Sjkim 194244971Sjkimstatic u_int 195244971Sjkimxdrmem_getpos(XDR *xdrs) 196244971Sjkim{ 197244971Sjkim 198244971Sjkim /* XXX w/64-bit pointers, u_int not enough! */ 199244971Sjkim return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 200244971Sjkim} 201244971Sjkim 202244971Sjkimstatic bool_t 203244971Sjkimxdrmem_setpos(XDR *xdrs, u_int pos) 204244971Sjkim{ 205298714Sjkim char *newaddr = xdrs->x_base + pos; 206244971Sjkim char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 207244971Sjkim 208244971Sjkim if (newaddr > lastaddr) 209244971Sjkim return (FALSE); 210244971Sjkim xdrs->x_private = newaddr; 211244971Sjkim xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */ 212244971Sjkim return (TRUE); 213244971Sjkim} 214244971Sjkim 215244971Sjkimstatic int32_t * 216244971Sjkimxdrmem_inline_aligned(XDR *xdrs, u_int len) 217244971Sjkim{ 218244971Sjkim int32_t *buf = NULL; 219244971Sjkim 220244971Sjkim if (xdrs->x_handy >= len) { 221244971Sjkim xdrs->x_handy -= len; 222244971Sjkim buf = (int32_t *)xdrs->x_private; 223244971Sjkim xdrs->x_private = (char *)xdrs->x_private + len; 224244971Sjkim } 225244971Sjkim return (buf); 226244971Sjkim} 227244971Sjkim 228244971Sjkim/* ARGSUSED */ 229244971Sjkimstatic int32_t * 230244971Sjkimxdrmem_inline_unaligned(XDR *xdrs, u_int len) 231244971Sjkim{ 232244971Sjkim 233244971Sjkim return (0); 234244971Sjkim} 235244971Sjkim