1 /* $NetBSD: xdr_mem.c,v 1.18 2012/03/20 17:14:50 matt Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: xdr_mem.c,v 1.18 2012/03/20 17:14:50 matt Exp $"); 39 #endif 40 #endif 41 42 /* 43 * xdr_mem.h, XDR implementation using memory buffers. 44 * 45 * Copyright (C) 1984, Sun Microsystems, Inc. 46 * 47 * If you have some data to be interpreted as external data representation 48 * or to be converted to external data representation in a memory buffer, 49 * then this is the package for you. 50 * 51 */ 52 53 #include "namespace.h" 54 55 #include <sys/types.h> 56 57 #include <netinet/in.h> 58 59 #include <string.h> 60 61 #include <rpc/types.h> 62 #include <rpc/xdr.h> 63 64 #ifdef __weak_alias 65 __weak_alias(xdrmem_create,_xdrmem_create) 66 #endif 67 68 static void xdrmem_destroy(XDR *); 69 static bool_t xdrmem_getlong_aligned(XDR *, long *); 70 static bool_t xdrmem_putlong_aligned(XDR *, const long *); 71 static bool_t xdrmem_getlong_unaligned(XDR *, long *); 72 static bool_t xdrmem_putlong_unaligned(XDR *, const long *); 73 static bool_t xdrmem_getbytes(XDR *, char *, u_int); 74 static bool_t xdrmem_putbytes(XDR *, const char *, u_int); 75 /* XXX: w/64-bit pointers, u_int not enough! */ 76 static u_int xdrmem_getpos(XDR *); 77 static bool_t xdrmem_setpos(XDR *, u_int); 78 static int32_t *xdrmem_inline_aligned(XDR *, u_int); 79 static int32_t *xdrmem_inline_unaligned(XDR *, u_int); 80 81 static const struct xdr_ops xdrmem_ops_aligned = { 82 xdrmem_getlong_aligned, 83 xdrmem_putlong_aligned, 84 xdrmem_getbytes, 85 xdrmem_putbytes, 86 xdrmem_getpos, 87 xdrmem_setpos, 88 xdrmem_inline_aligned, 89 xdrmem_destroy, 90 NULL, /* xdrmem_control */ 91 }; 92 93 static const struct xdr_ops xdrmem_ops_unaligned = { 94 xdrmem_getlong_unaligned, 95 xdrmem_putlong_unaligned, 96 xdrmem_getbytes, 97 xdrmem_putbytes, 98 xdrmem_getpos, 99 xdrmem_setpos, 100 xdrmem_inline_unaligned, 101 xdrmem_destroy, 102 NULL, /* xdrmem_control */ 103 }; 104 105 /* 106 * The procedure xdrmem_create initializes a stream descriptor for a 107 * memory buffer. 108 */ 109 void 110 xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) 111 { 112 113 xdrs->x_op = op; 114 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 115 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 116 xdrs->x_private = xdrs->x_base = addr; 117 xdrs->x_handy = size; 118 } 119 120 /*ARGSUSED*/ 121 static void 122 xdrmem_destroy(XDR *xdrs) 123 { 124 125 } 126 127 static bool_t 128 xdrmem_getlong_aligned(XDR *xdrs, long *lp) 129 { 130 131 if (xdrs->x_handy < sizeof(int32_t)) 132 return (FALSE); 133 xdrs->x_handy -= sizeof(int32_t); 134 *lp = ntohl(*(u_int32_t *)xdrs->x_private); 135 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 136 return (TRUE); 137 } 138 139 static bool_t 140 xdrmem_putlong_aligned(XDR *xdrs, const long *lp) 141 { 142 143 if (xdrs->x_handy < sizeof(int32_t)) 144 return (FALSE); 145 xdrs->x_handy -= sizeof(int32_t); 146 *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); 147 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 148 return (TRUE); 149 } 150 151 static bool_t 152 xdrmem_getlong_unaligned(XDR *xdrs, long *lp) 153 { 154 u_int32_t l; 155 156 if (xdrs->x_handy < sizeof(int32_t)) 157 return (FALSE); 158 xdrs->x_handy -= sizeof(int32_t); 159 memmove(&l, xdrs->x_private, sizeof(int32_t)); 160 *lp = ntohl(l); 161 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 162 return (TRUE); 163 } 164 165 static bool_t 166 xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) 167 { 168 u_int32_t l; 169 170 if (xdrs->x_handy < sizeof(int32_t)) 171 return (FALSE); 172 xdrs->x_handy -= sizeof(int32_t); 173 l = htonl((u_int32_t)*lp); 174 memmove(xdrs->x_private, &l, sizeof(int32_t)); 175 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 176 return (TRUE); 177 } 178 179 static bool_t 180 xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) 181 { 182 183 if (xdrs->x_handy < len) 184 return (FALSE); 185 xdrs->x_handy -= len; 186 memmove(addr, xdrs->x_private, len); 187 xdrs->x_private = (char *)xdrs->x_private + len; 188 return (TRUE); 189 } 190 191 static bool_t 192 xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) 193 { 194 195 if (xdrs->x_handy < len) 196 return (FALSE); 197 xdrs->x_handy -= len; 198 memmove(xdrs->x_private, addr, len); 199 xdrs->x_private = (char *)xdrs->x_private + len; 200 return (TRUE); 201 } 202 203 static u_int 204 xdrmem_getpos(XDR *xdrs) 205 { 206 207 /* XXX w/64-bit pointers, u_int not enough! */ 208 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 209 } 210 211 static bool_t 212 xdrmem_setpos(XDR *xdrs, u_int pos) 213 { 214 char *newaddr = xdrs->x_base + pos; 215 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 216 217 if ((long)newaddr > (long)lastaddr) 218 return (FALSE); 219 xdrs->x_private = newaddr; 220 xdrs->x_handy = (int)((long)lastaddr - (long)newaddr); 221 return (TRUE); 222 } 223 224 static int32_t * 225 xdrmem_inline_aligned(XDR *xdrs, u_int len) 226 { 227 int32_t *buf = 0; 228 229 if (xdrs->x_handy >= len) { 230 xdrs->x_handy -= len; 231 buf = (int32_t *)xdrs->x_private; 232 xdrs->x_private = (char *)xdrs->x_private + len; 233 } 234 return (buf); 235 } 236 237 /* ARGSUSED */ 238 static int32_t * 239 xdrmem_inline_unaligned(XDR *xdrs, u_int len) 240 { 241 242 return (0); 243 } 244