1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro 30 * @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC 31 * $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ 32 * $FreeBSD: src/lib/libc/xdr/xdr_mem.c,v 1.13 2004/10/16 06:32:43 obrien Exp $ 33 */ 34 35 /* 36 * xdr_mem.h, XDR implementation using memory buffers. 37 * 38 * Copyright (C) 1984, Sun Microsystems, Inc. 39 * 40 * If you have some data to be interpreted as external data representation 41 * or to be converted to external data representation in a memory buffer, 42 * then this is the package for you. 43 * 44 */ 45 46 #include "namespace.h" 47 #include <sys/types.h> 48 49 #include <netinet/in.h> 50 51 #include <string.h> 52 53 #include <rpc/types.h> 54 #include <rpc/xdr.h> 55 #include "un-namespace.h" 56 57 static void xdrmem_destroy(XDR *); 58 static bool_t xdrmem_getlong_aligned(XDR *, long *); 59 static bool_t xdrmem_putlong_aligned(XDR *, const long *); 60 static bool_t xdrmem_getlong_unaligned(XDR *, long *); 61 static bool_t xdrmem_putlong_unaligned(XDR *, const long *); 62 static bool_t xdrmem_getbytes(XDR *, char *, u_int); 63 static bool_t xdrmem_putbytes(XDR *, const char *, u_int); 64 /* XXX: w/64-bit pointers, u_int not enough! */ 65 static u_int xdrmem_getpos(XDR *); 66 static bool_t xdrmem_setpos(XDR *, u_int); 67 static int32_t *xdrmem_inline_aligned(XDR *, u_int); 68 static int32_t *xdrmem_inline_unaligned(XDR *, u_int); 69 70 static const struct xdr_ops xdrmem_ops_aligned = { 71 xdrmem_getlong_aligned, 72 xdrmem_putlong_aligned, 73 xdrmem_getbytes, 74 xdrmem_putbytes, 75 xdrmem_getpos, 76 xdrmem_setpos, 77 xdrmem_inline_aligned, 78 xdrmem_destroy, 79 NULL 80 }; 81 82 static const struct xdr_ops xdrmem_ops_unaligned = { 83 xdrmem_getlong_unaligned, 84 xdrmem_putlong_unaligned, 85 xdrmem_getbytes, 86 xdrmem_putbytes, 87 xdrmem_getpos, 88 xdrmem_setpos, 89 xdrmem_inline_unaligned, 90 xdrmem_destroy, 91 NULL 92 }; 93 94 /* 95 * The procedure xdrmem_create initializes a stream descriptor for a 96 * memory buffer. 97 */ 98 void 99 xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) 100 { 101 102 xdrs->x_op = op; 103 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 104 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 105 xdrs->x_private = xdrs->x_base = addr; 106 xdrs->x_handy = size; 107 } 108 109 /*ARGSUSED*/ 110 static void 111 xdrmem_destroy(XDR *xdrs __unused) 112 { 113 114 } 115 116 static bool_t 117 xdrmem_getlong_aligned(XDR *xdrs, long *lp) 118 { 119 120 if (xdrs->x_handy < sizeof(int32_t)) 121 return (FALSE); 122 xdrs->x_handy -= sizeof(int32_t); 123 *lp = ntohl(*(uint32_t *)xdrs->x_private); 124 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 125 return (TRUE); 126 } 127 128 static bool_t 129 xdrmem_putlong_aligned(XDR *xdrs, const long *lp) 130 { 131 132 if (xdrs->x_handy < sizeof(int32_t)) 133 return (FALSE); 134 xdrs->x_handy -= sizeof(int32_t); 135 *(uint32_t *)xdrs->x_private = htonl((uint32_t)*lp); 136 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 137 return (TRUE); 138 } 139 140 static bool_t 141 xdrmem_getlong_unaligned(XDR *xdrs, long *lp) 142 { 143 uint32_t l; 144 145 if (xdrs->x_handy < sizeof(int32_t)) 146 return (FALSE); 147 xdrs->x_handy -= sizeof(int32_t); 148 memmove(&l, xdrs->x_private, sizeof(int32_t)); 149 *lp = ntohl(l); 150 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 151 return (TRUE); 152 } 153 154 static bool_t 155 xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) 156 { 157 uint32_t l; 158 159 if (xdrs->x_handy < sizeof(int32_t)) 160 return (FALSE); 161 xdrs->x_handy -= sizeof(int32_t); 162 l = htonl((uint32_t)*lp); 163 memmove(xdrs->x_private, &l, sizeof(int32_t)); 164 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 165 return (TRUE); 166 } 167 168 static bool_t 169 xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) 170 { 171 172 if (xdrs->x_handy < len) 173 return (FALSE); 174 xdrs->x_handy -= len; 175 memmove(addr, xdrs->x_private, len); 176 xdrs->x_private = (char *)xdrs->x_private + len; 177 return (TRUE); 178 } 179 180 static bool_t 181 xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) 182 { 183 184 if (xdrs->x_handy < len) 185 return (FALSE); 186 xdrs->x_handy -= len; 187 memmove(xdrs->x_private, addr, len); 188 xdrs->x_private = (char *)xdrs->x_private + len; 189 return (TRUE); 190 } 191 192 static u_int 193 xdrmem_getpos(XDR *xdrs) 194 { 195 196 /* XXX w/64-bit pointers, u_int not enough! */ 197 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 198 } 199 200 static bool_t 201 xdrmem_setpos(XDR *xdrs, u_int pos) 202 { 203 char *newaddr = xdrs->x_base + pos; 204 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 205 206 if (newaddr > lastaddr) 207 return (FALSE); 208 xdrs->x_private = newaddr; 209 xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */ 210 return (TRUE); 211 } 212 213 static int32_t * 214 xdrmem_inline_aligned(XDR *xdrs, u_int len) 215 { 216 int32_t *buf = NULL; 217 218 if (xdrs->x_handy >= len) { 219 xdrs->x_handy -= len; 220 buf = (int32_t *)xdrs->x_private; 221 xdrs->x_private = (char *)xdrs->x_private + len; 222 } 223 return (buf); 224 } 225 226 /* ARGSUSED */ 227 static int32_t * 228 xdrmem_inline_unaligned(XDR *xdrs __unused, u_int len __unused) 229 { 230 231 return (0); 232 } 233