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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> |
28f540f4 RM |
44 | |
45 | #define LASTUNSIGNED ((u_int)0-1) | |
46 | ||
47 | ||
48 | /* | |
49 | * XDR an array of arbitrary elements | |
50 | * *addrp is a pointer to the array, *sizep is the number of elements. | |
51 | * If addrp is NULL (*sizep * elsize) bytes are allocated. | |
52 | * elsize is the size (in bytes) of each element, and elproc is the | |
53 | * xdr procedure to call to handle each element of the array. | |
54 | */ | |
55 | bool_t | |
e7fd8a39 UD |
56 | xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc) |
57 | XDR *xdrs; | |
58 | caddr_t *addrp; /* array pointer */ | |
59 | u_int *sizep; /* number of elements */ | |
60 | u_int maxsize; /* max numberof elements */ | |
61 | u_int elsize; /* size in bytes of each element */ | |
62 | xdrproc_t elproc; /* xdr routine to handle each element */ | |
28f540f4 | 63 | { |
e7fd8a39 UD |
64 | u_int i; |
65 | caddr_t target = *addrp; | |
66 | u_int c; /* the actual element count */ | |
67 | bool_t stat = TRUE; | |
28f540f4 | 68 | |
e7fd8a39 | 69 | /* like strings, arrays are really counted arrays */ |
7b57bfe5 | 70 | if (!xdr_u_int (xdrs, sizep)) |
e7fd8a39 UD |
71 | { |
72 | return FALSE; | |
73 | } | |
74 | c = *sizep; | |
12892ded UD |
75 | /* |
76 | * XXX: Let the overflow possibly happen with XDR_FREE because mem_free() | |
77 | * doesn't actually use its second argument anyway. | |
78 | */ | |
79 | if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE)) | |
e7fd8a39 UD |
80 | { |
81 | return FALSE; | |
82 | } | |
28f540f4 | 83 | |
e7fd8a39 UD |
84 | /* |
85 | * if we are deserializing, we may need to allocate an array. | |
86 | * We also save time by checking for a null array if we are freeing. | |
87 | */ | |
88 | if (target == NULL) | |
89 | switch (xdrs->x_op) | |
90 | { | |
91 | case XDR_DECODE: | |
92 | if (c == 0) | |
93 | return TRUE; | |
5e65a53d | 94 | *addrp = target = calloc (c, elsize); |
28f540f4 | 95 | if (target == NULL) |
e7fd8a39 | 96 | { |
1d20f7f8 | 97 | (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n")); |
e7fd8a39 UD |
98 | return FALSE; |
99 | } | |
e7fd8a39 | 100 | break; |
28f540f4 | 101 | |
e7fd8a39 UD |
102 | case XDR_FREE: |
103 | return TRUE; | |
104 | default: | |
105 | break; | |
106 | } | |
6d52618b | 107 | |
e7fd8a39 UD |
108 | /* |
109 | * now we xdr each element of array | |
110 | */ | |
111 | for (i = 0; (i < c) && stat; i++) | |
112 | { | |
113 | stat = (*elproc) (xdrs, target, LASTUNSIGNED); | |
114 | target += elsize; | |
115 | } | |
28f540f4 | 116 | |
e7fd8a39 UD |
117 | /* |
118 | * the array may need freeing | |
119 | */ | |
120 | if (xdrs->x_op == XDR_FREE) | |
121 | { | |
5e65a53d | 122 | mem_free (*addrp, c * elsize); |
e7fd8a39 UD |
123 | *addrp = NULL; |
124 | } | |
125 | return stat; | |
28f540f4 | 126 | } |
7b57bfe5 UD |
127 | #ifdef EXPORT_RPC_SYMBOLS |
128 | libc_hidden_def (xdr_array) | |
129 | #else | |
021db4be | 130 | libc_hidden_nolink_sunrpc (xdr_array, GLIBC_2_0) |
7b57bfe5 | 131 | #endif |
28f540f4 RM |
132 | |
133 | /* | |
134 | * xdr_vector(): | |
135 | * | |
136 | * XDR a fixed length array. Unlike variable-length arrays, | |
137 | * the storage of fixed length arrays is static and unfreeable. | |
138 | * > basep: base of the array | |
139 | * > size: size of the array | |
140 | * > elemsize: size of each element | |
141 | * > xdr_elem: routine to XDR each element | |
142 | */ | |
143 | bool_t | |
e7fd8a39 UD |
144 | xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem) |
145 | XDR *xdrs; | |
146 | char *basep; | |
147 | u_int nelem; | |
148 | u_int elemsize; | |
149 | xdrproc_t xdr_elem; | |
28f540f4 | 150 | { |
e7fd8a39 UD |
151 | u_int i; |
152 | char *elptr; | |
28f540f4 | 153 | |
e7fd8a39 UD |
154 | elptr = basep; |
155 | for (i = 0; i < nelem; i++) | |
156 | { | |
157 | if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED)) | |
158 | { | |
159 | return FALSE; | |
28f540f4 | 160 | } |
e7fd8a39 UD |
161 | elptr += elemsize; |
162 | } | |
163 | return TRUE; | |
28f540f4 | 164 | } |
021db4be | 165 | libc_hidden_nolink_sunrpc (xdr_vector, GLIBC_2_0) |