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, MERCHANTIBILITY 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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char *rcsid = "$OpenBSD: xdr_mem.c,v 1.6 1996/11/14 06:33:13 etheisen Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 /* 35 * xdr_mem.h, XDR implementation using memory buffers. 36 * 37 * Copyright (C) 1984, Sun Microsystems, Inc. 38 * 39 * If you have some data to be interpreted as external data representation 40 * or to be converted to external data representation in a memory buffer, 41 * then this is the package for you. 42 * 43 */ 44 45 #include <string.h> 46 47 #include <rpc/types.h> 48 #include <rpc/xdr.h> 49 #include <netinet/in.h> 50 51 static bool_t xdrmem_getlong_aligned(); 52 static bool_t xdrmem_putlong_aligned(); 53 static bool_t xdrmem_getlong_unaligned(); 54 static bool_t xdrmem_putlong_unaligned(); 55 static bool_t xdrmem_getbytes(); 56 static bool_t xdrmem_putbytes(); 57 static u_int xdrmem_getpos(); /* XXX w/64-bit pointers, u_int not enough! */ 58 static bool_t xdrmem_setpos(); 59 static int32_t *xdrmem_inline_aligned(); 60 static int32_t *xdrmem_inline_unaligned(); 61 static void xdrmem_destroy(); 62 63 static struct xdr_ops xdrmem_ops_aligned = { 64 xdrmem_getlong_aligned, 65 xdrmem_putlong_aligned, 66 xdrmem_getbytes, 67 xdrmem_putbytes, 68 xdrmem_getpos, 69 xdrmem_setpos, 70 xdrmem_inline_aligned, 71 xdrmem_destroy 72 }; 73 74 static struct xdr_ops xdrmem_ops_unaligned = { 75 xdrmem_getlong_unaligned, 76 xdrmem_putlong_unaligned, 77 xdrmem_getbytes, 78 xdrmem_putbytes, 79 xdrmem_getpos, 80 xdrmem_setpos, 81 xdrmem_inline_unaligned, 82 xdrmem_destroy 83 }; 84 85 /* 86 * The procedure xdrmem_create initializes a stream descriptor for a 87 * memory buffer. 88 */ 89 void 90 xdrmem_create(xdrs, addr, size, op) 91 register XDR *xdrs; 92 caddr_t addr; 93 u_int size; 94 enum xdr_op op; 95 { 96 97 xdrs->x_op = op; 98 xdrs->x_ops = ((size_t)addr & (sizeof(int32_t) - 1)) 99 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 100 xdrs->x_private = xdrs->x_base = addr; 101 xdrs->x_handy = size; 102 } 103 104 static void 105 xdrmem_destroy(/*xdrs*/) 106 /*XDR *xdrs;*/ 107 { 108 109 } 110 111 static bool_t 112 xdrmem_getlong_aligned(xdrs, lp) 113 register XDR *xdrs; 114 long *lp; 115 { 116 117 if ((xdrs->x_handy -= sizeof(int32_t)) < 0) 118 return (FALSE); 119 *lp = ntohl(*(int32_t *)xdrs->x_private); 120 xdrs->x_private += sizeof(int32_t); 121 return (TRUE); 122 } 123 124 static bool_t 125 xdrmem_putlong_aligned(xdrs, lp) 126 register XDR *xdrs; 127 long *lp; 128 { 129 130 if ((xdrs->x_handy -= sizeof(int32_t)) < 0) 131 return (FALSE); 132 *(int32_t *)xdrs->x_private = htonl(*lp); 133 xdrs->x_private += sizeof(int32_t); 134 return (TRUE); 135 } 136 137 static bool_t 138 xdrmem_getlong_unaligned(xdrs, lp) 139 register XDR *xdrs; 140 long *lp; 141 { 142 int32_t l; 143 144 if ((xdrs->x_handy -= sizeof(int32_t)) < 0) 145 return (FALSE); 146 memcpy(&l, xdrs->x_private, sizeof(int32_t)); 147 *lp = ntohl(l); 148 xdrs->x_private += sizeof(int32_t); 149 return (TRUE); 150 } 151 152 static bool_t 153 xdrmem_putlong_unaligned(xdrs, lp) 154 register XDR *xdrs; 155 long *lp; 156 { 157 int32_t l; 158 159 if ((xdrs->x_handy -= sizeof(int32_t)) < 0) 160 return (FALSE); 161 l = htonl(*lp); 162 memcpy(xdrs->x_private, &l, sizeof(int32_t)); 163 xdrs->x_private += sizeof(int32_t); 164 return (TRUE); 165 } 166 167 static bool_t 168 xdrmem_getbytes(xdrs, addr, len) 169 register XDR *xdrs; 170 caddr_t addr; 171 register u_int len; 172 { 173 174 if ((xdrs->x_handy -= len) < 0) 175 return (FALSE); 176 memcpy(addr, xdrs->x_private, len); 177 xdrs->x_private += len; 178 return (TRUE); 179 } 180 181 static bool_t 182 xdrmem_putbytes(xdrs, addr, len) 183 register XDR *xdrs; 184 caddr_t addr; 185 register u_int len; 186 { 187 188 if ((xdrs->x_handy -= len) < 0) 189 return (FALSE); 190 memcpy(xdrs->x_private, addr, len); 191 xdrs->x_private += len; 192 return (TRUE); 193 } 194 195 static u_int 196 xdrmem_getpos(xdrs) 197 register XDR *xdrs; 198 { 199 200 /* XXX w/64-bit pointers, u_int not enough! */ 201 return ((u_long)xdrs->x_private - (u_long)xdrs->x_base); 202 } 203 204 static bool_t 205 xdrmem_setpos(xdrs, pos) 206 register XDR *xdrs; 207 u_int pos; 208 { 209 register caddr_t newaddr = xdrs->x_base + pos; 210 register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; 211 212 if ((long)newaddr > (long)lastaddr) 213 return (FALSE); 214 xdrs->x_private = newaddr; 215 xdrs->x_handy = (long)lastaddr - (long)newaddr; 216 return (TRUE); 217 } 218 219 static int32_t * 220 xdrmem_inline_aligned(xdrs, len) 221 register XDR *xdrs; 222 int len; 223 { 224 int32_t *buf = 0; 225 226 if (xdrs->x_handy >= len) { 227 xdrs->x_handy -= len; 228 buf = (int32_t *)xdrs->x_private; 229 xdrs->x_private += len; 230 } 231 return (buf); 232 } 233 234 /* ARGSUSED */ 235 static int32_t * 236 xdrmem_inline_unaligned(xdrs, len) 237 register XDR *xdrs; 238 int len; 239 { 240 241 return (0); 242 } 243