1/* Copyright (C) 2006-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <limits.h>
19#include <stdio.h>
20#include <string.h>
21#include <rpc/rpc.h>
22#include <sys/mman.h>
23#include <unistd.h>
24#include <stdint.h>
25
26static int
27do_test (void)
28{
29 XDR xdrs;
30 void *buf;
31 size_t ps = sysconf (_SC_PAGESIZE);
32 uintptr_t half = -1;
33 int v_int;
34 u_short v_u_short;
35
36 half = (half >> 1) & ~(uintptr_t) (ps - 1);
37 buf = mmap (addr: (void *) half, len: 2 * ps, PROT_READ | PROT_WRITE,
38 MAP_PRIVATE | MAP_ANON, fd: -1, offset: 0);
39 if (buf == MAP_FAILED || buf != (void *) half)
40 {
41 puts (s: "Couldn't mmap 2 pages in the middle of address space");
42 return 0;
43 }
44
45 xdrmem_create (&xdrs, (char *) buf, 2 * ps, XDR_ENCODE);
46
47#define T(type, val) \
48 v_##type = val; \
49 if (! xdr_##type (&xdrs, &v_##type)) \
50 { \
51 puts ("encoding of " #type \
52 " " #val " failed"); \
53 return 1; \
54 }
55
56 T(int, 127)
57
58 u_int pos = xdr_getpos (&xdrs);
59
60 T(u_short, 31)
61
62 if (! xdr_setpos (&xdrs, pos))
63 {
64 puts (s: "xdr_setpos during encoding failed");
65 return 1;
66 }
67
68 T(u_short, 36)
69
70#undef T
71
72 xdr_destroy (&xdrs);
73
74 xdrmem_create (&xdrs, (char *) buf, 2 * ps, XDR_DECODE);
75
76#define T(type, val) \
77 v_##type = 0x15; \
78 if (! xdr_##type (&xdrs, &v_##type)) \
79 { \
80 puts ("decoding of " #type \
81 " " #val " failed"); \
82 return 1; \
83 } \
84 if (v_##type != val) \
85 { \
86 puts ("decoded value differs, " \
87 "type " #type " " #val); \
88 return 1; \
89 }
90
91 T(int, 127)
92
93 pos = xdr_getpos (&xdrs);
94
95 T(u_short, 36)
96
97 if (! xdr_setpos (&xdrs, pos))
98 {
99 puts (s: "xdr_setpos during encoding failed");
100 return 1;
101 }
102
103 T(u_short, 36)
104
105#undef T
106
107 xdr_destroy (&xdrs);
108
109 return 0;
110}
111
112#define TEST_FUNCTION do_test ()
113#include "../test-skeleton.c"
114

source code of glibc/sunrpc/tst-xdrmem2.c