1 /* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */
2 /*
3 * Copyright (c) 2010, Oracle America, Inc.
4 *
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * * Neither the name of the "Oracle America, Inc." nor the names of
19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
23 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 #if !defined(lint) && defined(SCCSIDS)
35 static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
36 #endif
37
38 /*
39 * xdr_array.c, Generic XDR routines impelmentation.
40 *
41 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
42 * arrays. See xdr.h for more info on the interface to xdr.
43 */
44
45 #include <stdio.h>
46 #include <string.h>
47 #include <gssrpc/types.h>
48 #include <gssrpc/xdr.h>
49
50 #define LASTUNSIGNED ((u_int)0-1)
51
52
53 /*
54 * XDR an array of arbitrary elements
55 * *addrp is a pointer to the array, *sizep is the number of elements.
56 * If addrp is NULL (*sizep * elsize) bytes are allocated.
57 * elsize is the size (in bytes) of each element, and elproc is the
58 * xdr procedure to call to handle each element of the array.
59 */
60 bool_t
xdr_array(XDR * xdrs,caddr_t * addrp,u_int * sizep,u_int maxsize,u_int elsize,xdrproc_t elproc)61 xdr_array(
62 XDR *xdrs,
63 caddr_t *addrp, /* array pointer */
64 u_int *sizep, /* number of elements */
65 u_int maxsize, /* max numberof elements */
66 u_int elsize, /* size in bytes of each element */
67 xdrproc_t elproc /* xdr routine to handle each element */
68 )
69 {
70 u_int i;
71 caddr_t target = *addrp;
72 u_int c; /* the actual element count */
73 bool_t stat = TRUE;
74 u_int nodesize;
75
76 /* like strings, arrays are really counted arrays */
77 if (! xdr_u_int(xdrs, sizep)) {
78 return (FALSE);
79 }
80 c = *sizep;
81 if ((c > maxsize || c > LASTUNSIGNED / elsize)
82 && (xdrs->x_op != XDR_FREE)) {
83 return (FALSE);
84 }
85 nodesize = c * elsize;
86
87 /*
88 * if we are deserializing, we may need to allocate an array.
89 * We also save time by checking for a null array if we are freeing.
90 */
91 if (target == NULL)
92 switch (xdrs->x_op) {
93 case XDR_DECODE:
94 if (c == 0)
95 return (TRUE);
96 *addrp = target = mem_alloc(nodesize);
97 if (target == NULL) {
98 (void) fprintf(stderr,
99 "xdr_array: out of memory\n");
100 return (FALSE);
101 }
102 memset(target, 0, nodesize);
103 break;
104
105 case XDR_FREE:
106 return (TRUE);
107
108 case XDR_ENCODE:
109 break;
110 }
111
112 /*
113 * now we xdr each element of array
114 */
115 for (i = 0; (i < c) && stat; i++) {
116 stat = (*elproc)(xdrs, target, LASTUNSIGNED);
117 target += elsize;
118 }
119
120 /*
121 * the array may need freeing
122 */
123 if (xdrs->x_op == XDR_FREE) {
124 mem_free(*addrp, nodesize);
125 *addrp = NULL;
126 }
127 return (stat);
128 }
129
130 /*
131 * xdr_vector():
132 *
133 * XDR a fixed length array. Unlike variable-length arrays,
134 * the storage of fixed length arrays is static and unfreeable.
135 * > basep: base of the array
136 * > size: size of the array
137 * > elemsize: size of each element
138 * > xdr_elem: routine to XDR each element
139 */
140 bool_t
xdr_vector(XDR * xdrs,char * basep,u_int nelem,u_int elemsize,xdrproc_t xdr_elem)141 xdr_vector(
142 XDR *xdrs,
143 char *basep,
144 u_int nelem,
145 u_int elemsize,
146 xdrproc_t xdr_elem)
147 {
148 u_int i;
149 char *elptr;
150
151 elptr = basep;
152 for (i = 0; i < nelem; i++) {
153 if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {
154 return(FALSE);
155 }
156 elptr += elemsize;
157 }
158 return(TRUE);
159 }
160