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, MERCHANTABILITY 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_array.c 1.10 87/08/11 Copyr 1984 Sun Micro
30 * @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC
31 * $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $
32 * $FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.15 2004/10/16 06:32:43 obrien Exp $
33 */
34
35 /*
36 * xdr_array.c, Generic XDR routines impelmentation.
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 *
40 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
41 * arrays. See xdr.h for more info on the interface to xdr.
42 */
43
44 #include "namespace.h"
45 #include <err.h>
46 #include <limits.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50
51 #include <rpc/types.h>
52 #include <rpc/xdr.h>
53 #include "un-namespace.h"
54
55 /*
56 * XDR an array of arbitrary elements
57 * *addrp is a pointer to the array, *sizep is the number of elements.
58 * If addrp is NULL (*sizep * elsize) bytes are allocated.
59 * elsize is the size (in bytes) of each element, and elproc is the
60 * xdr procedure to call to handle each element of the array.
61 *
62 * Parameters:
63 * addrp: array pointer
64 * sizep: number of elements
65 * maxsize: max number of elements
66 * elsize: size in bytes of each element
67 * elproc: xdr routine to handle each element
68 */
69 bool_t
xdr_array(XDR * xdrs,caddr_t * addrp,u_int * sizep,u_int maxsize,u_int elsize,xdrproc_t elproc)70 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize,
71 xdrproc_t elproc)
72 {
73 u_int i;
74 caddr_t target = *addrp;
75 u_int c; /* the actual element count */
76 bool_t stat = TRUE;
77 u_int nodesize;
78
79 /* like strings, arrays are really counted arrays */
80 if (!xdr_u_int(xdrs, sizep)) {
81 return (FALSE);
82 }
83 c = *sizep;
84 if ((c > maxsize || UINT_MAX/elsize < c) &&
85 (xdrs->x_op != XDR_FREE)) {
86 return (FALSE);
87 }
88 nodesize = c * elsize;
89
90 /*
91 * if we are deserializing, we may need to allocate an array.
92 * We also save time by checking for a null array if we are freeing.
93 */
94 if (target == NULL)
95 switch (xdrs->x_op) {
96 case XDR_DECODE:
97 if (c == 0)
98 return (TRUE);
99 *addrp = target = mem_alloc(nodesize);
100 if (target == NULL) {
101 warnx("xdr_array: out of memory");
102 return (FALSE);
103 }
104 memset(target, 0, nodesize);
105 break;
106
107 case XDR_FREE:
108 return (TRUE);
109
110 case XDR_ENCODE:
111 break;
112 }
113
114 /*
115 * now we xdr each element of array
116 */
117 for (i = 0; (i < c) && stat; i++) {
118 stat = (*elproc)(xdrs, target);
119 target += elsize;
120 }
121
122 /*
123 * the array may need freeing
124 */
125 if (xdrs->x_op == XDR_FREE) {
126 mem_free(*addrp, nodesize);
127 *addrp = NULL;
128 }
129 return (stat);
130 }
131
132 /*
133 * xdr_vector():
134 *
135 * XDR a fixed length array. Unlike variable-length arrays,
136 * the storage of fixed length arrays is static and unfreeable.
137 * > basep: base of the array
138 * > size: size of the array
139 * > elemsize: size of each element
140 * > xdr_elem: routine to XDR each element
141 */
142 bool_t
xdr_vector(XDR * xdrs,char * basep,u_int nelem,u_int elemsize,xdrproc_t xdr_elem)143 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize,
144 xdrproc_t xdr_elem)
145 {
146 u_int i;
147 char *elptr;
148
149 elptr = basep;
150 for (i = 0; i < nelem; i++) {
151 if (!(*xdr_elem)(xdrs, elptr)) {
152 return(FALSE);
153 }
154 elptr += elemsize;
155 }
156 return(TRUE);
157 }
158