[df49c60] | 1 | /* |
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| 2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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| 3 | * unrestricted use provided that this legend is included on all tape |
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| 4 | * media and as a part of the software program in whole or part. Users |
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| 5 | * may copy or modify Sun RPC without charge, but are not authorized |
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| 6 | * to license or distribute it to anyone else except as part of a product or |
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| 7 | * program developed by the user. |
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| 8 | * |
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| 9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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| 10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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| 11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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| 12 | * |
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| 13 | * Sun RPC is provided with no support and without any obligation on the |
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| 14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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| 15 | * modification or enhancement. |
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| 16 | * |
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| 17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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| 18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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| 19 | * OR ANY PART THEREOF. |
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| 20 | * |
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| 21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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| 22 | * or profits or other special, indirect and consequential damages, even if |
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| 23 | * Sun has been advised of the possibility of such damages. |
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| 24 | * |
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| 25 | * Sun Microsystems, Inc. |
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| 26 | * 2550 Garcia Avenue |
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| 27 | * Mountain View, California 94043 |
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| 28 | */ |
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| 29 | |
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| 30 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 31 | /*static char *sccsid = "from: @(#)xdr.c 1.35 87/08/12";*/ |
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| 32 | /*static char *sccsid = "from: @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC";*/ |
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| 33 | static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr.c,v 1.9 1999/08/28 00:02:55 peter Exp $"; |
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| 34 | #endif |
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| 35 | |
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| 36 | /* |
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| 37 | * xdr.c, Generic XDR routines implementation. |
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| 38 | * |
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| 39 | * Copyright (C) 1986, Sun Microsystems, Inc. |
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| 40 | * |
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| 41 | * These are the "generic" xdr routines used to serialize and de-serialize |
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| 42 | * most common data items. See xdr.h for more info on the interface to |
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| 43 | * xdr. |
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| 44 | */ |
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| 45 | |
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| 46 | #include <stdio.h> |
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| 47 | #include <stdlib.h> |
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| 48 | #include <string.h> |
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| 49 | |
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| 50 | #include <rpc/types.h> |
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| 51 | #include <rpc/xdr.h> |
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| 52 | |
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| 53 | /* |
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| 54 | * constants specific to the xdr "protocol" |
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| 55 | */ |
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| 56 | #define XDR_FALSE ((long) 0) |
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| 57 | #define XDR_TRUE ((long) 1) |
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| 58 | #define LASTUNSIGNED ((u_int) 0-1) |
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| 59 | |
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| 60 | /* |
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| 61 | * for unit alignment |
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| 62 | */ |
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| 63 | static char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 }; |
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| 64 | |
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| 65 | /* |
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| 66 | * Free a data structure using XDR |
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| 67 | * Not a filter, but a convenient utility nonetheless |
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| 68 | */ |
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| 69 | void |
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| 70 | xdr_free(proc, objp) |
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| 71 | xdrproc_t proc; |
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| 72 | char *objp; |
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| 73 | { |
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| 74 | XDR x; |
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| 75 | |
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| 76 | x.x_op = XDR_FREE; |
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| 77 | (*proc)(&x, objp); |
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| 78 | } |
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| 79 | |
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| 80 | /* |
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| 81 | * XDR nothing |
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| 82 | */ |
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| 83 | bool_t |
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| 84 | xdr_void(/* xdrs, addr */) |
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| 85 | /* XDR *xdrs; */ |
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| 86 | /* caddr_t addr; */ |
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| 87 | { |
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| 88 | |
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| 89 | return (TRUE); |
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| 90 | } |
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| 91 | |
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| 92 | |
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| 93 | /* |
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| 94 | * XDR integers |
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| 95 | */ |
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| 96 | bool_t |
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| 97 | xdr_int(xdrs, ip) |
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| 98 | XDR *xdrs; |
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| 99 | int *ip; |
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| 100 | { |
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| 101 | long l; |
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| 102 | |
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| 103 | switch (xdrs->x_op) { |
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| 104 | |
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| 105 | case XDR_ENCODE: |
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| 106 | l = (long) *ip; |
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| 107 | return (XDR_PUTLONG(xdrs, &l)); |
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| 108 | |
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| 109 | case XDR_DECODE: |
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| 110 | if (!XDR_GETLONG(xdrs, &l)) { |
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| 111 | return (FALSE); |
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| 112 | } |
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| 113 | *ip = (int) l; |
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| 114 | return (TRUE); |
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| 115 | |
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| 116 | case XDR_FREE: |
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| 117 | return (TRUE); |
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| 118 | } |
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| 119 | return (FALSE); |
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| 120 | } |
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| 121 | |
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| 122 | /* |
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| 123 | * XDR unsigned integers |
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| 124 | */ |
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| 125 | bool_t |
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| 126 | xdr_u_int(xdrs, up) |
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| 127 | XDR *xdrs; |
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| 128 | u_int *up; |
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| 129 | { |
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| 130 | u_long l; |
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| 131 | |
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| 132 | switch (xdrs->x_op) { |
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| 133 | |
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| 134 | case XDR_ENCODE: |
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| 135 | l = (u_long) *up; |
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| 136 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
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| 137 | |
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| 138 | case XDR_DECODE: |
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| 139 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
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| 140 | return (FALSE); |
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| 141 | } |
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| 142 | *up = (u_int) l; |
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| 143 | return (TRUE); |
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| 144 | |
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| 145 | case XDR_FREE: |
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| 146 | return (TRUE); |
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| 147 | } |
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| 148 | return (FALSE); |
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| 149 | } |
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| 150 | |
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| 151 | |
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| 152 | /* |
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| 153 | * XDR long integers |
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| 154 | * same as xdr_u_long - open coded to save a proc call! |
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| 155 | */ |
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| 156 | bool_t |
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| 157 | xdr_long(xdrs, lp) |
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| 158 | register XDR *xdrs; |
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| 159 | long *lp; |
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| 160 | { |
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| 161 | switch (xdrs->x_op) { |
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| 162 | case XDR_ENCODE: |
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| 163 | return (XDR_PUTLONG(xdrs, lp)); |
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| 164 | case XDR_DECODE: |
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| 165 | return (XDR_GETLONG(xdrs, lp)); |
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| 166 | case XDR_FREE: |
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| 167 | return (TRUE); |
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| 168 | } |
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| 169 | |
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| 170 | return (FALSE); |
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| 171 | } |
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| 172 | |
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| 173 | /* |
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| 174 | * XDR unsigned long integers |
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| 175 | * same as xdr_long - open coded to save a proc call! |
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| 176 | */ |
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| 177 | bool_t |
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| 178 | xdr_u_long(xdrs, ulp) |
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| 179 | register XDR *xdrs; |
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| 180 | u_long *ulp; |
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| 181 | { |
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| 182 | switch (xdrs->x_op) { |
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| 183 | case XDR_ENCODE: |
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| 184 | return (XDR_PUTLONG(xdrs, (long *)ulp)); |
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| 185 | case XDR_DECODE: |
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| 186 | return (XDR_GETLONG(xdrs, (long *)ulp)); |
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| 187 | case XDR_FREE: |
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| 188 | return (TRUE); |
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| 189 | } |
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| 190 | return (FALSE); |
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| 191 | } |
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| 192 | |
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| 193 | |
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| 194 | /* |
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| 195 | * XDR 32-bit integers |
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| 196 | * same as xdr_u_int32_t - open coded to save a proc call! |
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| 197 | */ |
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| 198 | bool_t |
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| 199 | xdr_int32_t(xdrs, int32_p) |
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| 200 | register XDR *xdrs; |
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| 201 | int32_t *int32_p; |
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| 202 | { |
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| 203 | long l; |
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| 204 | |
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| 205 | switch (xdrs->x_op) { |
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| 206 | |
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| 207 | case XDR_ENCODE: |
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| 208 | l = (long) *int32_p; |
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| 209 | return (XDR_PUTLONG(xdrs, &l)); |
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| 210 | |
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| 211 | case XDR_DECODE: |
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| 212 | if (!XDR_GETLONG(xdrs, &l)) { |
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| 213 | return (FALSE); |
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| 214 | } |
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| 215 | *int32_p = (int32_t) l; |
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| 216 | return (TRUE); |
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| 217 | |
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| 218 | case XDR_FREE: |
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| 219 | return (TRUE); |
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| 220 | } |
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| 221 | return (FALSE); |
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| 222 | } |
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| 223 | |
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| 224 | /* |
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| 225 | * XDR unsigned 32-bit integers |
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| 226 | * same as xdr_int32_t - open coded to save a proc call! |
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| 227 | */ |
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| 228 | bool_t |
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| 229 | xdr_u_int32_t(xdrs, u_int32_p) |
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| 230 | register XDR *xdrs; |
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| 231 | u_int32_t *u_int32_p; |
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| 232 | { |
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| 233 | u_long l; |
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| 234 | |
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| 235 | switch (xdrs->x_op) { |
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| 236 | |
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| 237 | case XDR_ENCODE: |
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| 238 | l = (u_long) *u_int32_p; |
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| 239 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
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| 240 | |
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| 241 | case XDR_DECODE: |
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| 242 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
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| 243 | return (FALSE); |
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| 244 | } |
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| 245 | *u_int32_p = (u_int32_t) l; |
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| 246 | return (TRUE); |
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| 247 | |
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| 248 | case XDR_FREE: |
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| 249 | return (TRUE); |
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| 250 | } |
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| 251 | return (FALSE); |
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| 252 | } |
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| 253 | |
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| 254 | /* |
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| 255 | * XDR 64-bit integers |
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| 256 | */ |
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| 257 | bool_t |
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| 258 | xdr_int64_t(xdrs, int64_p) |
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| 259 | register XDR *xdrs; |
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| 260 | int64_t *int64_p; |
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| 261 | { |
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| 262 | int64_t x; |
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| 263 | |
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| 264 | switch (xdrs->x_op) { |
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| 265 | |
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| 266 | case XDR_ENCODE: |
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| 267 | return (xdr_opaque(xdrs, (caddr_t)int64_p, sizeof(int64_t))); |
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| 268 | |
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| 269 | case XDR_DECODE: |
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| 270 | if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { |
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| 271 | return (FALSE); |
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| 272 | } |
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| 273 | *int64_p = x; |
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| 274 | return (TRUE); |
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| 275 | |
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| 276 | case XDR_FREE: |
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| 277 | return (TRUE); |
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| 278 | } |
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| 279 | return (FALSE); |
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| 280 | } |
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| 281 | |
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| 282 | /* |
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| 283 | * XDR unsigned 64-bit integers |
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| 284 | */ |
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| 285 | bool_t |
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| 286 | xdr_u_int64_t(xdrs, uint64_p) |
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| 287 | register XDR *xdrs; |
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| 288 | u_int64_t *uint64_p; |
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| 289 | { |
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| 290 | u_int64_t x; |
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| 291 | |
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| 292 | switch (xdrs->x_op) { |
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| 293 | |
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| 294 | case XDR_ENCODE: |
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| 295 | return (xdr_opaque(xdrs, (caddr_t)uint64_p, sizeof(u_int64_t))); |
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| 296 | |
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| 297 | case XDR_DECODE: |
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| 298 | if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { |
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| 299 | return (FALSE); |
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| 300 | } |
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| 301 | *uint64_p = x; |
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| 302 | return (TRUE); |
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| 303 | |
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| 304 | case XDR_FREE: |
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| 305 | return (TRUE); |
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| 306 | } |
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| 307 | return (FALSE); |
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| 308 | } |
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| 309 | |
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| 310 | |
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| 311 | /* |
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| 312 | * XDR short integers |
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| 313 | */ |
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| 314 | bool_t |
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| 315 | xdr_short(xdrs, sp) |
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| 316 | register XDR *xdrs; |
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| 317 | short *sp; |
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| 318 | { |
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| 319 | long l; |
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| 320 | |
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| 321 | switch (xdrs->x_op) { |
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| 322 | |
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| 323 | case XDR_ENCODE: |
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| 324 | l = (long) *sp; |
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| 325 | return (XDR_PUTLONG(xdrs, &l)); |
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| 326 | |
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| 327 | case XDR_DECODE: |
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| 328 | if (!XDR_GETLONG(xdrs, &l)) { |
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| 329 | return (FALSE); |
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| 330 | } |
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| 331 | *sp = (short) l; |
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| 332 | return (TRUE); |
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| 333 | |
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| 334 | case XDR_FREE: |
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| 335 | return (TRUE); |
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| 336 | } |
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| 337 | return (FALSE); |
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| 338 | } |
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| 339 | |
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| 340 | /* |
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| 341 | * XDR unsigned short integers |
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| 342 | */ |
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| 343 | bool_t |
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| 344 | xdr_u_short(xdrs, usp) |
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| 345 | register XDR *xdrs; |
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| 346 | u_short *usp; |
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| 347 | { |
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| 348 | u_long l; |
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| 349 | |
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| 350 | switch (xdrs->x_op) { |
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| 351 | |
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| 352 | case XDR_ENCODE: |
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| 353 | l = (u_long) *usp; |
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| 354 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
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| 355 | |
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| 356 | case XDR_DECODE: |
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| 357 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
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| 358 | return (FALSE); |
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| 359 | } |
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| 360 | *usp = (u_short) l; |
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| 361 | return (TRUE); |
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| 362 | |
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| 363 | case XDR_FREE: |
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| 364 | return (TRUE); |
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| 365 | } |
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| 366 | return (FALSE); |
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| 367 | } |
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| 368 | |
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| 369 | |
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| 370 | /* |
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| 371 | * XDR 16-bit integers |
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| 372 | */ |
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| 373 | bool_t |
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| 374 | xdr_int16_t(xdrs, int16_p) |
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| 375 | register XDR *xdrs; |
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| 376 | int16_t *int16_p; |
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| 377 | { |
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| 378 | long l; |
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| 379 | |
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| 380 | switch (xdrs->x_op) { |
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| 381 | |
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| 382 | case XDR_ENCODE: |
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| 383 | l = (long) *int16_p; |
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| 384 | return (XDR_PUTLONG(xdrs, &l)); |
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| 385 | |
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| 386 | case XDR_DECODE: |
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| 387 | if (!XDR_GETLONG(xdrs, &l)) { |
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| 388 | return (FALSE); |
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| 389 | } |
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| 390 | *int16_p = (int16_t) l; |
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| 391 | return (TRUE); |
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| 392 | |
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| 393 | case XDR_FREE: |
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| 394 | return (TRUE); |
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| 395 | } |
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| 396 | return (FALSE); |
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| 397 | } |
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| 398 | |
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| 399 | /* |
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| 400 | * XDR unsigned 16-bit integers |
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| 401 | */ |
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| 402 | bool_t |
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| 403 | xdr_u_int16_t(xdrs, u_int16_p) |
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| 404 | register XDR *xdrs; |
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| 405 | u_int16_t *u_int16_p; |
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| 406 | { |
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| 407 | u_long l; |
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| 408 | |
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| 409 | switch (xdrs->x_op) { |
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| 410 | |
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| 411 | case XDR_ENCODE: |
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| 412 | l = (u_long) *u_int16_p; |
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| 413 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
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| 414 | |
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| 415 | case XDR_DECODE: |
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| 416 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
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| 417 | return (FALSE); |
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| 418 | } |
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| 419 | *u_int16_p = (u_int16_t) l; |
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| 420 | return (TRUE); |
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| 421 | |
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| 422 | case XDR_FREE: |
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| 423 | return (TRUE); |
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| 424 | } |
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| 425 | return (FALSE); |
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| 426 | } |
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| 427 | |
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| 428 | |
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| 429 | /* |
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| 430 | * XDR a char |
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| 431 | */ |
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| 432 | bool_t |
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| 433 | xdr_char(xdrs, cp) |
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| 434 | XDR *xdrs; |
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| 435 | char *cp; |
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| 436 | { |
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| 437 | int i; |
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| 438 | |
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| 439 | i = (*cp); |
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| 440 | if (!xdr_int(xdrs, &i)) { |
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| 441 | return (FALSE); |
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| 442 | } |
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| 443 | *cp = i; |
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| 444 | return (TRUE); |
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| 445 | } |
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| 446 | |
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| 447 | /* |
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| 448 | * XDR an unsigned char |
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| 449 | */ |
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| 450 | bool_t |
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| 451 | xdr_u_char(xdrs, cp) |
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| 452 | XDR *xdrs; |
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| 453 | u_char *cp; |
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| 454 | { |
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| 455 | u_int u; |
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| 456 | |
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| 457 | u = (*cp); |
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| 458 | if (!xdr_u_int(xdrs, &u)) { |
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| 459 | return (FALSE); |
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| 460 | } |
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| 461 | *cp = u; |
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| 462 | return (TRUE); |
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| 463 | } |
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| 464 | |
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| 465 | /* |
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| 466 | * XDR booleans |
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| 467 | */ |
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| 468 | bool_t |
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| 469 | xdr_bool(xdrs, bp) |
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| 470 | register XDR *xdrs; |
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| 471 | bool_t *bp; |
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| 472 | { |
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| 473 | long lb; |
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| 474 | |
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| 475 | switch (xdrs->x_op) { |
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| 476 | |
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| 477 | case XDR_ENCODE: |
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| 478 | lb = *bp ? XDR_TRUE : XDR_FALSE; |
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| 479 | return (XDR_PUTLONG(xdrs, &lb)); |
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| 480 | |
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| 481 | case XDR_DECODE: |
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| 482 | if (!XDR_GETLONG(xdrs, &lb)) { |
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| 483 | return (FALSE); |
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| 484 | } |
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| 485 | *bp = (lb == XDR_FALSE) ? FALSE : TRUE; |
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| 486 | return (TRUE); |
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| 487 | |
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| 488 | case XDR_FREE: |
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| 489 | return (TRUE); |
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| 490 | } |
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| 491 | return (FALSE); |
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| 492 | } |
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| 493 | |
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| 494 | /* |
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| 495 | * XDR enumerations |
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| 496 | */ |
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| 497 | bool_t |
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| 498 | xdr_enum(xdrs, ep) |
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| 499 | XDR *xdrs; |
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| 500 | enum_t *ep; |
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| 501 | { |
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| 502 | #ifndef lint |
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| 503 | enum sizecheck { SIZEVAL }; /* used to find the size of an enum */ |
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| 504 | |
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| 505 | /* |
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| 506 | * enums are treated as ints |
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| 507 | */ |
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| 508 | if (sizeof (enum sizecheck) == sizeof (long)) { |
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| 509 | return (xdr_long(xdrs, (long *)ep)); |
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| 510 | } else if (sizeof (enum sizecheck) == sizeof (int)) { |
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| 511 | return (xdr_int(xdrs, (int *)ep)); |
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| 512 | } else if (sizeof (enum sizecheck) == sizeof (short)) { |
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| 513 | return (xdr_short(xdrs, (short *)ep)); |
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| 514 | } else { |
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| 515 | return (FALSE); |
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| 516 | } |
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| 517 | #else |
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| 518 | (void) (xdr_short(xdrs, (short *)ep)); |
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| 519 | (void) (xdr_int(xdrs, (int *)ep)); |
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| 520 | return (xdr_long(xdrs, (long *)ep)); |
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| 521 | #endif |
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| 522 | } |
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| 523 | |
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| 524 | /* |
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| 525 | * XDR opaque data |
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| 526 | * Allows the specification of a fixed size sequence of opaque bytes. |
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| 527 | * cp points to the opaque object and cnt gives the byte length. |
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| 528 | */ |
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| 529 | bool_t |
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| 530 | xdr_opaque(xdrs, cp, cnt) |
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| 531 | register XDR *xdrs; |
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| 532 | caddr_t cp; |
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| 533 | register u_int cnt; |
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| 534 | { |
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| 535 | register u_int rndup; |
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| 536 | static int crud[BYTES_PER_XDR_UNIT]; |
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| 537 | |
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| 538 | /* |
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| 539 | * if no data we are done |
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| 540 | */ |
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| 541 | if (cnt == 0) |
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| 542 | return (TRUE); |
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| 543 | |
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| 544 | /* |
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| 545 | * round byte count to full xdr units |
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| 546 | */ |
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| 547 | rndup = cnt % BYTES_PER_XDR_UNIT; |
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| 548 | if (rndup > 0) |
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| 549 | rndup = BYTES_PER_XDR_UNIT - rndup; |
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| 550 | |
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| 551 | if (xdrs->x_op == XDR_DECODE) { |
---|
| 552 | if (!XDR_GETBYTES(xdrs, cp, cnt)) { |
---|
| 553 | return (FALSE); |
---|
| 554 | } |
---|
| 555 | if (rndup == 0) |
---|
| 556 | return (TRUE); |
---|
| 557 | return (XDR_GETBYTES(xdrs, (caddr_t)crud, rndup)); |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | if (xdrs->x_op == XDR_ENCODE) { |
---|
| 561 | if (!XDR_PUTBYTES(xdrs, cp, cnt)) { |
---|
| 562 | return (FALSE); |
---|
| 563 | } |
---|
| 564 | if (rndup == 0) |
---|
| 565 | return (TRUE); |
---|
| 566 | return (XDR_PUTBYTES(xdrs, xdr_zero, rndup)); |
---|
| 567 | } |
---|
| 568 | |
---|
| 569 | if (xdrs->x_op == XDR_FREE) { |
---|
| 570 | return (TRUE); |
---|
| 571 | } |
---|
| 572 | |
---|
| 573 | return (FALSE); |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | /* |
---|
| 577 | * XDR counted bytes |
---|
| 578 | * *cpp is a pointer to the bytes, *sizep is the count. |
---|
| 579 | * If *cpp is NULL maxsize bytes are allocated |
---|
| 580 | */ |
---|
| 581 | bool_t |
---|
| 582 | xdr_bytes(xdrs, cpp, sizep, maxsize) |
---|
| 583 | register XDR *xdrs; |
---|
| 584 | char **cpp; |
---|
| 585 | register u_int *sizep; |
---|
| 586 | u_int maxsize; |
---|
| 587 | { |
---|
| 588 | register char *sp = *cpp; /* sp is the actual string pointer */ |
---|
| 589 | register u_int nodesize; |
---|
| 590 | |
---|
| 591 | /* |
---|
| 592 | * first deal with the length since xdr bytes are counted |
---|
| 593 | */ |
---|
| 594 | if (! xdr_u_int(xdrs, sizep)) { |
---|
| 595 | return (FALSE); |
---|
| 596 | } |
---|
| 597 | nodesize = *sizep; |
---|
| 598 | if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) { |
---|
| 599 | return (FALSE); |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | /* |
---|
| 603 | * now deal with the actual bytes |
---|
| 604 | */ |
---|
| 605 | switch (xdrs->x_op) { |
---|
| 606 | |
---|
| 607 | case XDR_DECODE: |
---|
| 608 | if (nodesize == 0) { |
---|
| 609 | return (TRUE); |
---|
| 610 | } |
---|
| 611 | if (sp == NULL) { |
---|
| 612 | *cpp = sp = (char *)mem_alloc(nodesize); |
---|
| 613 | } |
---|
| 614 | if (sp == NULL) { |
---|
| 615 | (void) fprintf(stderr, "xdr_bytes: out of memory\n"); |
---|
| 616 | return (FALSE); |
---|
| 617 | } |
---|
| 618 | /* fall into ... */ |
---|
| 619 | |
---|
| 620 | case XDR_ENCODE: |
---|
| 621 | return (xdr_opaque(xdrs, sp, nodesize)); |
---|
| 622 | |
---|
| 623 | case XDR_FREE: |
---|
| 624 | if (sp != NULL) { |
---|
| 625 | mem_free(sp, nodesize); |
---|
| 626 | *cpp = NULL; |
---|
| 627 | } |
---|
| 628 | return (TRUE); |
---|
| 629 | } |
---|
| 630 | return (FALSE); |
---|
| 631 | } |
---|
| 632 | |
---|
| 633 | /* |
---|
| 634 | * Implemented here due to commonality of the object. |
---|
| 635 | */ |
---|
| 636 | bool_t |
---|
| 637 | xdr_netobj(xdrs, np) |
---|
| 638 | XDR *xdrs; |
---|
| 639 | struct netobj *np; |
---|
| 640 | { |
---|
| 641 | |
---|
| 642 | return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ)); |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | /* |
---|
| 646 | * XDR a descriminated union |
---|
| 647 | * Support routine for discriminated unions. |
---|
| 648 | * You create an array of xdrdiscrim structures, terminated with |
---|
| 649 | * an entry with a null procedure pointer. The routine gets |
---|
| 650 | * the discriminant value and then searches the array of xdrdiscrims |
---|
| 651 | * looking for that value. It calls the procedure given in the xdrdiscrim |
---|
| 652 | * to handle the discriminant. If there is no specific routine a default |
---|
| 653 | * routine may be called. |
---|
| 654 | * If there is no specific or default routine an error is returned. |
---|
| 655 | */ |
---|
| 656 | bool_t |
---|
| 657 | xdr_union(xdrs, dscmp, unp, choices, dfault) |
---|
| 658 | register XDR *xdrs; |
---|
| 659 | enum_t *dscmp; /* enum to decide which arm to work on */ |
---|
| 660 | char *unp; /* the union itself */ |
---|
| 661 | struct xdr_discrim *choices; /* [value, xdr proc] for each arm */ |
---|
| 662 | xdrproc_t dfault; /* default xdr routine */ |
---|
| 663 | { |
---|
| 664 | register enum_t dscm; |
---|
| 665 | |
---|
| 666 | /* |
---|
| 667 | * we deal with the discriminator; it's an enum |
---|
| 668 | */ |
---|
| 669 | if (! xdr_enum(xdrs, dscmp)) { |
---|
| 670 | return (FALSE); |
---|
| 671 | } |
---|
| 672 | dscm = *dscmp; |
---|
| 673 | |
---|
| 674 | /* |
---|
| 675 | * search choices for a value that matches the discriminator. |
---|
| 676 | * if we find one, execute the xdr routine for that value. |
---|
| 677 | */ |
---|
| 678 | for (; choices->proc != NULL_xdrproc_t; choices++) { |
---|
| 679 | if (choices->value == dscm) |
---|
| 680 | return ((*(choices->proc))(xdrs, unp, LASTUNSIGNED)); |
---|
| 681 | } |
---|
| 682 | |
---|
| 683 | /* |
---|
| 684 | * no match - execute the default xdr routine if there is one |
---|
| 685 | */ |
---|
| 686 | return ((dfault == NULL_xdrproc_t) ? FALSE : |
---|
| 687 | (*dfault)(xdrs, unp, LASTUNSIGNED)); |
---|
| 688 | } |
---|
| 689 | |
---|
| 690 | |
---|
| 691 | /* |
---|
| 692 | * Non-portable xdr primitives. |
---|
| 693 | * Care should be taken when moving these routines to new architectures. |
---|
| 694 | */ |
---|
| 695 | |
---|
| 696 | |
---|
| 697 | /* |
---|
| 698 | * XDR null terminated ASCII strings |
---|
| 699 | * xdr_string deals with "C strings" - arrays of bytes that are |
---|
| 700 | * terminated by a NULL character. The parameter cpp references a |
---|
| 701 | * pointer to storage; If the pointer is null, then the necessary |
---|
| 702 | * storage is allocated. The last parameter is the max allowed length |
---|
| 703 | * of the string as specified by a protocol. |
---|
| 704 | */ |
---|
| 705 | bool_t |
---|
| 706 | xdr_string(xdrs, cpp, maxsize) |
---|
| 707 | register XDR *xdrs; |
---|
| 708 | char **cpp; |
---|
| 709 | u_int maxsize; |
---|
| 710 | { |
---|
| 711 | register char *sp = *cpp; /* sp is the actual string pointer */ |
---|
| 712 | u_int size; |
---|
| 713 | u_int nodesize; |
---|
| 714 | |
---|
| 715 | /* |
---|
| 716 | * first deal with the length since xdr strings are counted-strings |
---|
| 717 | */ |
---|
| 718 | switch (xdrs->x_op) { |
---|
| 719 | case XDR_FREE: |
---|
| 720 | if (sp == NULL) { |
---|
| 721 | return(TRUE); /* already free */ |
---|
| 722 | } |
---|
| 723 | /* fall through... */ |
---|
| 724 | case XDR_ENCODE: |
---|
| 725 | size = strlen(sp); |
---|
| 726 | break; |
---|
| 727 | case XDR_DECODE: /* to avoid warning */ |
---|
| 728 | break; |
---|
| 729 | } |
---|
| 730 | if (! xdr_u_int(xdrs, &size)) { |
---|
| 731 | return (FALSE); |
---|
| 732 | } |
---|
| 733 | if (size > maxsize) { |
---|
| 734 | return (FALSE); |
---|
| 735 | } |
---|
| 736 | nodesize = size + 1; |
---|
| 737 | |
---|
| 738 | /* |
---|
| 739 | * now deal with the actual bytes |
---|
| 740 | */ |
---|
| 741 | switch (xdrs->x_op) { |
---|
| 742 | |
---|
| 743 | case XDR_DECODE: |
---|
| 744 | if (nodesize == 0) { |
---|
| 745 | return (TRUE); |
---|
| 746 | } |
---|
| 747 | if (sp == NULL) |
---|
| 748 | *cpp = sp = (char *)mem_alloc(nodesize); |
---|
| 749 | if (sp == NULL) { |
---|
| 750 | (void) fprintf(stderr, "xdr_string: out of memory\n"); |
---|
| 751 | return (FALSE); |
---|
| 752 | } |
---|
| 753 | sp[size] = 0; |
---|
| 754 | /* fall into ... */ |
---|
| 755 | |
---|
| 756 | case XDR_ENCODE: |
---|
| 757 | return (xdr_opaque(xdrs, sp, size)); |
---|
| 758 | |
---|
| 759 | case XDR_FREE: |
---|
| 760 | mem_free(sp, nodesize); |
---|
| 761 | *cpp = NULL; |
---|
| 762 | return (TRUE); |
---|
| 763 | } |
---|
| 764 | return (FALSE); |
---|
| 765 | } |
---|
| 766 | |
---|
| 767 | /* |
---|
| 768 | * Wrapper for xdr_string that can be called directly from |
---|
| 769 | * routines like clnt_call |
---|
| 770 | */ |
---|
| 771 | bool_t |
---|
| 772 | xdr_wrapstring(xdrs, cpp) |
---|
| 773 | XDR *xdrs; |
---|
| 774 | char **cpp; |
---|
| 775 | { |
---|
| 776 | return xdr_string(xdrs, cpp, LASTUNSIGNED); |
---|
| 777 | } |
---|