1 | /* Test ns_name_compress corner cases. |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <resolv.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <support/check.h> |
23 | #include <support/support.h> |
24 | |
25 | /* Check that we can process names which fit into the destination |
26 | buffer exactly. See bug 21359. */ |
27 | static void |
28 | test_exact_fit (const char *name, size_t length) |
29 | { |
30 | unsigned char *buf = xmalloc (n: length + 1); |
31 | memset (s: buf, c: '$', n: length + 1); |
32 | enum { ptr_count = 5 }; |
33 | const unsigned char *dnptrs[ptr_count] = { buf, }; |
34 | int ret = ns_name_compress (name, buf, length, |
35 | dnptrs, dnptrs + ptr_count); |
36 | if (ret < 0) |
37 | { |
38 | support_record_failure (); |
39 | printf (format: "error: ns_name_compress for %s/%zu failed\n" , name, length); |
40 | return; |
41 | } |
42 | if ((size_t) ret != length) |
43 | { |
44 | support_record_failure (); |
45 | printf (format: "error: ns_name_compress for %s/%zu result mismatch: %d\n" , |
46 | name, length, ret); |
47 | } |
48 | if (buf[length] != '$') |
49 | { |
50 | support_record_failure (); |
51 | printf (format: "error: ns_name_compress for %s/%zu padding write\n" , |
52 | name, length); |
53 | } |
54 | free (ptr: buf); |
55 | } |
56 | |
57 | static int |
58 | do_test (void) |
59 | { |
60 | test_exact_fit (name: "abc" , length: 5); |
61 | test_exact_fit (name: "abc." , length: 5); |
62 | { |
63 | char long_name[] |
64 | = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa." |
65 | "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa." |
66 | "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa." |
67 | "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa." ; |
68 | TEST_VERIFY (strlen (long_name) == NS_MAXCDNAME - 1); |
69 | test_exact_fit (name: long_name, NS_MAXCDNAME); |
70 | long_name[sizeof (long_name) - 1] = '\0'; |
71 | test_exact_fit (name: long_name, NS_MAXCDNAME); |
72 | } |
73 | return 0; |
74 | } |
75 | |
76 | #include <support/test-driver.c> |
77 | |