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 * xdr_sizeof.c 31 * 32 * Copyright 1990 Sun Microsystems, Inc. 33 * 34 * General purpose routine to see how much space something will use 35 * when serialized using XDR. 36 */ 37 38 #include <sys/cdefs.h> 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 43 #include <rpc/types.h> 44 #include <rpc/xdr.h> 45 46 /* ARGSUSED */ 47 static bool_t 48 x_putlong(XDR *xdrs, const long *longp) 49 { 50 51 xdrs->x_handy += BYTES_PER_XDR_UNIT; 52 return (TRUE); 53 } 54 55 /* ARGSUSED */ 56 static bool_t 57 x_putbytes(XDR *xdrs, const char *bp, u_int len) 58 { 59 60 xdrs->x_handy += len; 61 return (TRUE); 62 } 63 64 static u_int 65 x_getpostn(XDR *xdrs) 66 { 67 68 return (xdrs->x_handy); 69 } 70 71 /* ARGSUSED */ 72 static bool_t 73 x_setpostn(XDR *xdrs, u_int pos) 74 { 75 76 /* This is not allowed */ 77 return (FALSE); 78 } 79 80 static int32_t * 81 x_inline(XDR *xdrs, u_int len) 82 { 83 84 if (len == 0) { 85 return (NULL); 86 } 87 if (xdrs->x_op != XDR_ENCODE) { 88 return (NULL); 89 } 90 if (len < (u_int)(uintptr_t)xdrs->x_base) { 91 /* x_private was already allocated */ 92 xdrs->x_handy += len; 93 return ((int32_t *) xdrs->x_private); 94 } else { 95 /* Free the earlier space and allocate new area */ 96 if (xdrs->x_private) 97 free(xdrs->x_private, M_RPC); 98 if ((xdrs->x_private = (caddr_t) malloc(len, M_RPC, M_WAITOK)) == NULL) { 99 xdrs->x_base = 0; 100 return (NULL); 101 } 102 xdrs->x_base = (caddr_t)(uintptr_t) len; 103 xdrs->x_handy += len; 104 return ((int32_t *) xdrs->x_private); 105 } 106 } 107 108 static int 109 harmless(void) 110 { 111 112 /* Always return FALSE/NULL, as the case may be */ 113 return (0); 114 } 115 116 static void 117 x_destroy(XDR *xdrs) 118 { 119 120 xdrs->x_handy = 0; 121 xdrs->x_base = 0; 122 if (xdrs->x_private) { 123 free(xdrs->x_private, M_RPC); 124 xdrs->x_private = NULL; 125 } 126 return; 127 } 128 129 unsigned long 130 xdr_sizeof(xdrproc_t func, void *data) 131 { 132 XDR x; 133 struct xdr_ops ops; 134 bool_t stat; 135 /* to stop ANSI-C compiler from complaining */ 136 typedef bool_t (* dummyfunc1)(XDR *, long *); 137 typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int); 138 139 ops.x_putlong = x_putlong; 140 ops.x_putbytes = x_putbytes; 141 ops.x_inline = x_inline; 142 ops.x_getpostn = x_getpostn; 143 ops.x_setpostn = x_setpostn; 144 ops.x_destroy = x_destroy; 145 146 /* the other harmless ones */ 147 ops.x_getlong = (dummyfunc1) harmless; 148 ops.x_getbytes = (dummyfunc2) harmless; 149 150 x.x_op = XDR_ENCODE; 151 x.x_ops = &ops; 152 x.x_handy = 0; 153 x.x_private = (caddr_t) NULL; 154 x.x_base = (caddr_t) 0; 155 156 stat = func(&x, data); 157 if (x.x_private) 158 free(x.x_private, M_RPC); 159 return (stat == TRUE ? (unsigned) x.x_handy: 0); 160 } 161