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28f540f4 | 1 | /* |
a7ab6ec8 | 2 | * xdr_array.c, Generic XDR routines implementation. |
6d52618b | 3 | * |
a7ab6ec8 | 4 | * Copyright (c) 2010, Oracle America, Inc. |
6d52618b | 5 | * |
a7ab6ec8 UD |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions are | |
8 | * met: | |
cb636bb2 | 9 | * |
a7ab6ec8 UD |
10 | * * Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * * Redistributions in binary form must reproduce the above | |
13 | * copyright notice, this list of conditions and the following | |
14 | * disclaimer in the documentation and/or other materials | |
15 | * provided with the distribution. | |
16 | * * Neither the name of the "Oracle America, Inc." nor the names of its | |
17 | * contributors may be used to endorse or promote products derived | |
18 | * from this software without specific prior written permission. | |
28f540f4 | 19 | * |
a7ab6ec8 UD |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
24 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
25 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE | |
27 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28f540f4 | 32 | * |
a7ab6ec8 UD |
33 | * These are the "non-trivial" xdr primitives used to serialize and |
34 | * de-serialize arrays. See xdr.h for more info on the interface to xdr. | |
28f540f4 RM |
35 | */ |
36 | ||
37 | #include <stdio.h> | |
e7fd8a39 | 38 | #include <string.h> |
28f540f4 RM |
39 | #include <rpc/types.h> |
40 | #include <rpc/xdr.h> | |
51028f34 | 41 | #include <libintl.h> |
12892ded | 42 | #include <limits.h> |
3ce1f295 | 43 | #include <wchar.h> |
82f43dd2 | 44 | #include <shlib-compat.h> |
28f540f4 RM |
45 | |
46 | #define LASTUNSIGNED ((u_int)0-1) | |
47 | ||
48 | ||
49 | /* | |
50 | * XDR an array of arbitrary elements | |
51 | * *addrp is a pointer to the array, *sizep is the number of elements. | |
52 | * If addrp is NULL (*sizep * elsize) bytes are allocated. | |
53 | * elsize is the size (in bytes) of each element, and elproc is the | |
54 | * xdr procedure to call to handle each element of the array. | |
55 | */ | |
56 | bool_t | |
80d9be81 JM |
57 | xdr_array (XDR *xdrs, |
58 | /* array pointer */ | |
59 | caddr_t *addrp, | |
60 | /* number of elements */ | |
61 | u_int *sizep, | |
62 | /* max numberof elements */ | |
63 | u_int maxsize, | |
64 | /* size in bytes of each element */ | |
65 | u_int elsize, | |
66 | /* xdr routine to handle each element */ | |
67 | xdrproc_t elproc) | |
28f540f4 | 68 | { |
e7fd8a39 UD |
69 | u_int i; |
70 | caddr_t target = *addrp; | |
71 | u_int c; /* the actual element count */ | |
72 | bool_t stat = TRUE; | |
28f540f4 | 73 | |
e7fd8a39 | 74 | /* like strings, arrays are really counted arrays */ |
7b57bfe5 | 75 | if (!xdr_u_int (xdrs, sizep)) |
e7fd8a39 UD |
76 | { |
77 | return FALSE; | |
78 | } | |
79 | c = *sizep; | |
12892ded UD |
80 | /* |
81 | * XXX: Let the overflow possibly happen with XDR_FREE because mem_free() | |
82 | * doesn't actually use its second argument anyway. | |
83 | */ | |
84 | if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE)) | |
e7fd8a39 UD |
85 | { |
86 | return FALSE; | |
87 | } | |
28f540f4 | 88 | |
e7fd8a39 UD |
89 | /* |
90 | * if we are deserializing, we may need to allocate an array. | |
91 | * We also save time by checking for a null array if we are freeing. | |
92 | */ | |
93 | if (target == NULL) | |
94 | switch (xdrs->x_op) | |
95 | { | |
96 | case XDR_DECODE: | |
97 | if (c == 0) | |
98 | return TRUE; | |
5e65a53d | 99 | *addrp = target = calloc (c, elsize); |
28f540f4 | 100 | if (target == NULL) |
e7fd8a39 | 101 | { |
1d20f7f8 | 102 | (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n")); |
e7fd8a39 UD |
103 | return FALSE; |
104 | } | |
e7fd8a39 | 105 | break; |
28f540f4 | 106 | |
e7fd8a39 UD |
107 | case XDR_FREE: |
108 | return TRUE; | |
109 | default: | |
110 | break; | |
111 | } | |
6d52618b | 112 | |
e7fd8a39 UD |
113 | /* |
114 | * now we xdr each element of array | |
115 | */ | |
116 | for (i = 0; (i < c) && stat; i++) | |
117 | { | |
118 | stat = (*elproc) (xdrs, target, LASTUNSIGNED); | |
119 | target += elsize; | |
120 | } | |
28f540f4 | 121 | |
e7fd8a39 UD |
122 | /* |
123 | * the array may need freeing | |
124 | */ | |
125 | if (xdrs->x_op == XDR_FREE) | |
126 | { | |
5e65a53d | 127 | mem_free (*addrp, c * elsize); |
e7fd8a39 UD |
128 | *addrp = NULL; |
129 | } | |
130 | return stat; | |
28f540f4 | 131 | } |
7b57bfe5 UD |
132 | #ifdef EXPORT_RPC_SYMBOLS |
133 | libc_hidden_def (xdr_array) | |
134 | #else | |
021db4be | 135 | libc_hidden_nolink_sunrpc (xdr_array, GLIBC_2_0) |
7b57bfe5 | 136 | #endif |
28f540f4 RM |
137 | |
138 | /* | |
139 | * xdr_vector(): | |
140 | * | |
141 | * XDR a fixed length array. Unlike variable-length arrays, | |
142 | * the storage of fixed length arrays is static and unfreeable. | |
143 | * > basep: base of the array | |
144 | * > size: size of the array | |
145 | * > elemsize: size of each element | |
146 | * > xdr_elem: routine to XDR each element | |
147 | */ | |
148 | bool_t | |
f63f2bfd JM |
149 | xdr_vector (XDR *xdrs, char *basep, u_int nelem, u_int elemsize, |
150 | xdrproc_t xdr_elem) | |
28f540f4 | 151 | { |
e7fd8a39 UD |
152 | u_int i; |
153 | char *elptr; | |
28f540f4 | 154 | |
e7fd8a39 UD |
155 | elptr = basep; |
156 | for (i = 0; i < nelem; i++) | |
157 | { | |
158 | if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED)) | |
159 | { | |
160 | return FALSE; | |
28f540f4 | 161 | } |
e7fd8a39 UD |
162 | elptr += elemsize; |
163 | } | |
164 | return TRUE; | |
28f540f4 | 165 | } |
021db4be | 166 | libc_hidden_nolink_sunrpc (xdr_vector, GLIBC_2_0) |