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 * @(#)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 }; 80 81 static const struct xdr_ops xdrmem_ops_unaligned = { 82 xdrmem_getlong_unaligned, 83 xdrmem_putlong_unaligned, 84 xdrmem_getbytes, 85 xdrmem_putbytes, 86 xdrmem_getpos, 87 xdrmem_setpos, 88 xdrmem_inline_unaligned, 89 xdrmem_destroy 90 }; 91 92 /* 93 * The procedure xdrmem_create initializes a stream descriptor for a 94 * memory buffer. 95 */ 96 void 97 xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) 98 { 99 100 xdrs->x_op = op; 101 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 102 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 103 xdrs->x_private = xdrs->x_base = addr; 104 xdrs->x_handy = size; 105 } 106 107 /*ARGSUSED*/ 108 static void 109 xdrmem_destroy(XDR *xdrs) 110 { 111 112 } 113 114 static bool_t 115 xdrmem_getlong_aligned(XDR *xdrs, long *lp) 116 { 117 118 if (xdrs->x_handy < sizeof(int32_t)) 119 return (FALSE); 120 xdrs->x_handy -= sizeof(int32_t); 121 *lp = ntohl(*(u_int32_t *)xdrs->x_private); 122 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 123 return (TRUE); 124 } 125 126 static bool_t 127 xdrmem_putlong_aligned(XDR *xdrs, const long *lp) 128 { 129 130 if (xdrs->x_handy < sizeof(int32_t)) 131 return (FALSE); 132 xdrs->x_handy -= sizeof(int32_t); 133 *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); 134 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 135 return (TRUE); 136 } 137 138 static bool_t 139 xdrmem_getlong_unaligned(XDR *xdrs, long *lp) 140 { 141 u_int32_t l; 142 143 if (xdrs->x_handy < sizeof(int32_t)) 144 return (FALSE); 145 xdrs->x_handy -= sizeof(int32_t); 146 memmove(&l, xdrs->x_private, sizeof(int32_t)); 147 *lp = ntohl(l); 148 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 149 return (TRUE); 150 } 151 152 static bool_t 153 xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) 154 { 155 u_int32_t l; 156 157 if (xdrs->x_handy < sizeof(int32_t)) 158 return (FALSE); 159 xdrs->x_handy -= sizeof(int32_t); 160 l = htonl((u_int32_t)*lp); 161 memmove(xdrs->x_private, &l, sizeof(int32_t)); 162 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 163 return (TRUE); 164 } 165 166 static bool_t 167 xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) 168 { 169 170 if (xdrs->x_handy < len) 171 return (FALSE); 172 xdrs->x_handy -= len; 173 memmove(addr, xdrs->x_private, len); 174 xdrs->x_private = (char *)xdrs->x_private + len; 175 return (TRUE); 176 } 177 178 static bool_t 179 xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) 180 { 181 182 if (xdrs->x_handy < len) 183 return (FALSE); 184 xdrs->x_handy -= len; 185 memmove(xdrs->x_private, addr, len); 186 xdrs->x_private = (char *)xdrs->x_private + len; 187 return (TRUE); 188 } 189 190 static u_int 191 xdrmem_getpos(XDR *xdrs) 192 { 193 194 /* XXX w/64-bit pointers, u_int not enough! */ 195 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 196 } 197 198 static bool_t 199 xdrmem_setpos(XDR *xdrs, u_int pos) 200 { 201 char *newaddr = xdrs->x_base + pos; 202 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 203 204 if (newaddr > lastaddr) 205 return (FALSE); 206 xdrs->x_private = newaddr; 207 xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */ 208 return (TRUE); 209 } 210 211 static int32_t * 212 xdrmem_inline_aligned(XDR *xdrs, u_int len) 213 { 214 int32_t *buf = NULL; 215 216 if (xdrs->x_handy >= len) { 217 xdrs->x_handy -= len; 218 buf = (int32_t *)xdrs->x_private; 219 xdrs->x_private = (char *)xdrs->x_private + len; 220 } 221 return (buf); 222 } 223 224 /* ARGSUSED */ 225 static int32_t * 226 xdrmem_inline_unaligned(XDR *xdrs __unused, u_int len __unused) 227 { 228 229 return (0); 230 } 231