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 *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/ 32 /*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/ 33 static char *rcsid = "$Id: xdr_mem.c,v 1.1 1993/10/27 05:41:11 paul Exp $"; 34 #endif 35 36 /* 37 * xdr_mem.h, XDR implementation using memory buffers. 38 * 39 * Copyright (C) 1984, Sun Microsystems, Inc. 40 * 41 * If you have some data to be interpreted as external data representation 42 * or to be converted to external data representation in a memory buffer, 43 * then this is the package for you. 44 * 45 */ 46 47 48 #include <rpc/types.h> 49 #include <rpc/xdr.h> 50 #include <netinet/in.h> 51 52 static bool_t xdrmem_getlong(); 53 static bool_t xdrmem_putlong(); 54 static bool_t xdrmem_getbytes(); 55 static bool_t xdrmem_putbytes(); 56 static u_int xdrmem_getpos(); 57 static bool_t xdrmem_setpos(); 58 static long * xdrmem_inline(); 59 static void xdrmem_destroy(); 60 61 static struct xdr_ops xdrmem_ops = { 62 xdrmem_getlong, 63 xdrmem_putlong, 64 xdrmem_getbytes, 65 xdrmem_putbytes, 66 xdrmem_getpos, 67 xdrmem_setpos, 68 xdrmem_inline, 69 xdrmem_destroy 70 }; 71 72 /* 73 * The procedure xdrmem_create initializes a stream descriptor for a 74 * memory buffer. 75 */ 76 void 77 xdrmem_create(xdrs, addr, size, op) 78 register XDR *xdrs; 79 caddr_t addr; 80 u_int size; 81 enum xdr_op op; 82 { 83 84 xdrs->x_op = op; 85 xdrs->x_ops = &xdrmem_ops; 86 xdrs->x_private = xdrs->x_base = addr; 87 xdrs->x_handy = size; 88 } 89 90 static void 91 xdrmem_destroy(/*xdrs*/) 92 /*XDR *xdrs;*/ 93 { 94 } 95 96 static bool_t 97 xdrmem_getlong(xdrs, lp) 98 register XDR *xdrs; 99 long *lp; 100 { 101 102 if ((xdrs->x_handy -= sizeof(long)) < 0) 103 return (FALSE); 104 *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); 105 xdrs->x_private += sizeof(long); 106 return (TRUE); 107 } 108 109 static bool_t 110 xdrmem_putlong(xdrs, lp) 111 register XDR *xdrs; 112 long *lp; 113 { 114 115 if ((xdrs->x_handy -= sizeof(long)) < 0) 116 return (FALSE); 117 *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); 118 xdrs->x_private += sizeof(long); 119 return (TRUE); 120 } 121 122 static bool_t 123 xdrmem_getbytes(xdrs, addr, len) 124 register XDR *xdrs; 125 caddr_t addr; 126 register u_int len; 127 { 128 129 if ((xdrs->x_handy -= len) < 0) 130 return (FALSE); 131 bcopy(xdrs->x_private, addr, len); 132 xdrs->x_private += len; 133 return (TRUE); 134 } 135 136 static bool_t 137 xdrmem_putbytes(xdrs, addr, len) 138 register XDR *xdrs; 139 caddr_t addr; 140 register u_int len; 141 { 142 143 if ((xdrs->x_handy -= len) < 0) 144 return (FALSE); 145 bcopy(addr, xdrs->x_private, len); 146 xdrs->x_private += len; 147 return (TRUE); 148 } 149 150 static u_int 151 xdrmem_getpos(xdrs) 152 register XDR *xdrs; 153 { 154 155 return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); 156 } 157 158 static bool_t 159 xdrmem_setpos(xdrs, pos) 160 register XDR *xdrs; 161 u_int pos; 162 { 163 register caddr_t newaddr = xdrs->x_base + pos; 164 register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; 165 166 if ((long)newaddr > (long)lastaddr) 167 return (FALSE); 168 xdrs->x_private = newaddr; 169 xdrs->x_handy = (int)lastaddr - (int)newaddr; 170 return (TRUE); 171 } 172 173 static long * 174 xdrmem_inline(xdrs, len) 175 register XDR *xdrs; 176 int len; 177 { 178 long *buf = 0; 179 180 if (xdrs->x_handy >= len) { 181 xdrs->x_handy -= len; 182 buf = (long *) xdrs->x_private; 183 xdrs->x_private += len; 184 } 185 return (buf); 186 } 187