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author | Florian Weimer <fweimer@redhat.com> | 2022-08-30 10:02:49 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2022-08-30 10:02:49 +0200 |
commit | 394085a34d25a51513019a4dc411acd3527fbd33 (patch) | |
tree | fafedbaebad9ec3d6049ca00f57cfa6dbc094983 /resolv/tst-ns_samebinaryname.c | |
parent | c79327bf00a4be6d60259227acc78ef80ead3622 (diff) | |
download | glibc-394085a34d25a51513019a4dc411acd3527fbd33.tar.gz glibc-394085a34d25a51513019a4dc411acd3527fbd33.tar.xz glibc-394085a34d25a51513019a4dc411acd3527fbd33.zip |
resolv: Add the __ns_samebinaryname function
During packet parsing, only the binary name is available. If the name equality check is performed before conversion to text, we can sometimes skip the last step. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'resolv/tst-ns_samebinaryname.c')
-rw-r--r-- | resolv/tst-ns_samebinaryname.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/resolv/tst-ns_samebinaryname.c b/resolv/tst-ns_samebinaryname.c new file mode 100644 index 0000000000..b06ac610b4 --- /dev/null +++ b/resolv/tst-ns_samebinaryname.c @@ -0,0 +1,62 @@ +/* Test the __ns_samebinaryname function. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <arpa/nameser.h> +#include <array_length.h> +#include <stdbool.h> +#include <stdio.h> +#include <support/check.h> + +/* First character denotes the comparison group: All names with the + same first character are expected to compare equal. */ +static const char *const cases[] = + { + " ", + "1\001a", "1\001A", + "2\002ab", "2\002aB", "2\002Ab", "2\002AB", + "3\001a\002ab", "3\001A\002ab", + "w\003www\007example\003com", "w\003Www\007Example\003Com", + "w\003WWW\007EXAMPLE\003COM", + "W\003WWW", "W\003www", + }; + +static int +do_test (void) +{ + for (int i = 0; i < array_length (cases); ++i) + for (int j = 0; j < array_length (cases); ++j) + { + unsigned char *a = (unsigned char *) &cases[i][1]; + unsigned char *b = (unsigned char *) &cases[j][1]; + bool actual = __ns_samebinaryname (a, b); + bool expected = cases[i][0] == cases[j][0]; + if (actual != expected) + { + char a1[NS_MAXDNAME]; + TEST_VERIFY (ns_name_ntop (a, a1, sizeof (a1)) > 0); + char b1[NS_MAXDNAME]; + TEST_VERIFY (ns_name_ntop (b, b1, sizeof (b1)) > 0); + printf ("error: \"%s\" \"%s\": expected %s\n", + a1, b1, expected ? "equal" : "unqueal"); + support_record_failure (); + } + } + return 0; +} + +#include <support/test-driver.c> |