glibc/resolv/tst-bug18665-tcp.c

231 lines
6.9 KiB
C
Raw Normal View History

/* Test __libc_res_nsend buffer mismanagement, basic TCP coverage.
Copyright (C) 2016-2023 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
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
Add missing header files throughout the testsuite. * crypt/md5.h: Test _LIBC with #if defined, not #if. * dirent/opendir-tst1.c: Include sys/stat.h. * dirent/tst-fdopendir.c: Include sys/stat.h. * dirent/tst-fdopendir2.c: Include stdlib.h. * dirent/tst-scandir.c: Include stdbool.h. * elf/tst-auditmod1.c: Include link.h and stddef.h. * elf/tst-tls15.c: Include stdlib.h. * elf/tst-tls16.c: Include stdlib.h. * elf/tst-tls17.c: Include stdlib.h. * elf/tst-tls18.c: Include stdlib.h. * iconv/tst-iconv6.c: Include endian.h. * iconvdata/bug-iconv11.c: Include limits.h. * io/test-utime.c: Include stdint.h. * io/tst-faccessat.c: Include sys/stat.h. * io/tst-fchmodat.c: Include sys/stat.h. * io/tst-fchownat.c: Include sys/stat.h. * io/tst-fstatat.c: Include sys/stat.h. * io/tst-futimesat.c: Include sys/stat.h. * io/tst-linkat.c: Include sys/stat.h. * io/tst-mkdirat.c: Include sys/stat.h and stdbool.h. * io/tst-mkfifoat.c: Include sys/stat.h and stdbool.h. * io/tst-mknodat.c: Include sys/stat.h and stdbool.h. * io/tst-openat.c: Include stdbool.h. * io/tst-readlinkat.c: Include sys/stat.h. * io/tst-renameat.c: Include sys/stat.h. * io/tst-symlinkat.c: Include sys/stat.h. * io/tst-unlinkat.c: Include stdbool.h. * libio/bug-memstream1.c: Include stdlib.h. * libio/bug-wmemstream1.c: Include stdlib.h. * libio/tst-fwrite-error.c: Include stdlib.h. * libio/tst-memstream1.c: Include stdlib.h. * libio/tst-memstream2.c: Include stdlib.h. * libio/tst-memstream3.c: Include stdlib.h. * malloc/tst-interpose-aux.c: Include stdint.h. * misc/tst-preadvwritev-common.c: Include sys/stat.h. * nptl/tst-basic7.c: Include limits.h. * nptl/tst-cancel25.c: Include pthread.h, not pthreadP.h. * nptl/tst-cancel4.c: Include stddef.h, limits.h, and sys/stat.h. * nptl/tst-cancel4_1.c: Include stddef.h. * nptl/tst-cancel4_2.c: Include stddef.h. * nptl/tst-cond16.c: Include limits.h. Use sysconf(_SC_PAGESIZE) instead of __getpagesize. * nptl/tst-cond18.c: Include limits.h. Use sysconf(_SC_PAGESIZE) instead of __getpagesize. * nptl/tst-cond4.c: Include stdint.h. * nptl/tst-cond6.c: Include stdint.h. * nptl/tst-stack2.c: Include limits.h. * nptl/tst-stackguard1.c: Include stddef.h. * nptl/tst-tls4.c: Include stdint.h. Don't include tls.h. * nptl/tst-tls4moda.c: Include stddef.h. Don't include stdio.h, unistd.h, or tls.h. * nptl/tst-tls4modb.c: Include stddef.h. Don't include stdio.h, unistd.h, or tls.h. * nptl/tst-tls5.h: Include stddef.h. Don't include stdlib.h or tls.h. * posix/tst-getaddrinfo2.c: Include stdio.h. * posix/tst-getaddrinfo5.c: Include stdio.h. * posix/tst-pathconf.c: Include sys/stat.h. * posix/tst-posix_fadvise-common.c: Include stdint.h. * posix/tst-preadwrite-common.c: Include sys/stat.h. * posix/tst-regex.c: Include stdint.h. Don't include spawn.h or spawn_int.h. * posix/tst-regexloc.c: Don't include spawn.h or spawn_int.h. * posix/tst-vfork3.c: Include sys/stat.h. * resolv/tst-bug18665-tcp.c: Include stdlib.h. * resolv/tst-res_hconf_reorder.c: Include stdlib.h. * resolv/tst-resolv-search.c: Include stdlib.h. * stdio-common/tst-fmemopen2.c: Include stdint.h. * stdio-common/tst-vfprintf-width-prec.c: Include stdlib.h. * stdlib/test-canon.c: Include sys/stat.h. * stdlib/tst-tls-atexit.c: Include stdbool.h. * string/test-memchr.c: Include stdint.h. * string/tst-cmp.c: Include stdint.h. * sysdeps/pthread/tst-timer.c: Include stdint.h. * sysdeps/unix/sysv/linux/tst-sync_file_range.c: Include stdint.h. * sysdeps/wordsize-64/tst-writev.c: Include limits.h and stdint.h. * sysdeps/x86_64/fpu/math-tests-arch.h: Include cpu-features.h. Don't include init-arch.h. * sysdeps/x86_64/multiarch/test-multiarch.h: Include cpu-features.h. Don't include init-arch.h. * sysdeps/x86_64/tst-auditmod10b.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod3b.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod4b.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod5b.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod6b.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod6c.c: Include link.h and stddef.h. * sysdeps/x86_64/tst-auditmod7b.c: Include link.h and stddef.h. * time/clocktest.c: Include stdint.h. * time/tst-posixtz.c: Include stdint.h. * timezone/tst-timezone.c: Include stdint.h.
2017-02-16 22:31:42 +00:00
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/check_nss.h>
#include <support/resolv_test.h>
#include <support/xthread.h>
#include <support/xmemstream.h>
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static int initial_address_count = 1;
static int subsequent_address_count = 2000;
static int response_number = 0;
static void
response (const struct resolv_response_context *ctx,
struct resolv_response_builder *b,
const char *qname, uint16_t qclass, uint16_t qtype)
{
TEST_VERIFY_EXIT (qname != NULL);
/* If not using TCP, just force its use. */
if (!ctx->tcp)
{
struct resolv_response_flags flags = {.tc = true};
resolv_response_init (b, flags);
resolv_response_add_question (b, qname, qclass, qtype);
return;
}
struct resolv_response_flags flags = {};
resolv_response_init (b, flags);
resolv_response_add_question (b, qname, qclass, qtype);
resolv_response_section (b, ns_s_an);
/* The number of addresses (in the additional section) for the name
server record (in the authoritative section). */
int address_count;
xpthread_mutex_lock (&lock);
++response_number;
if (response_number == 1)
address_count = initial_address_count;
else if (response_number == 2)
{
address_count = 0;
resolv_response_drop (b);
resolv_response_close (b);
}
else
address_count = subsequent_address_count;
xpthread_mutex_unlock (&lock);
/* Only add the address record to the answer section if we requested
any name server addresses. */
if (address_count > 0)
{
resolv_response_open_record (b, qname, qclass, qtype, 0);
switch (qtype)
{
case T_A:
{
char ipv4[4] = {10, response_number >> 8, response_number, 0};
ipv4[3] = 2 * ctx->tcp + 4 * ctx->server_index;
resolv_response_add_data (b, &ipv4, sizeof (ipv4));
}
break;
case T_AAAA:
{
char ipv6[16]
= {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0,
response_number >> 8, response_number, 0, 0};
ipv6[15] = 2 * ctx->tcp + 4 * ctx->server_index;
resolv_response_add_data (b, &ipv6, sizeof (ipv6));
}
break;
default:
support_record_failure ();
printf ("error: unexpected QTYPE: %s/%u/%u\n",
qname, qclass, qtype);
}
resolv_response_close_record (b);
/* Add the name server record. */
resolv_response_section (b, ns_s_ns);
resolv_response_open_record (b, "example", C_IN, T_NS, 0);
resolv_response_add_name (b, "ns.example");
resolv_response_close_record (b);
/* Increase the response size with name server addresses. These
addresses are not copied out of nss_dns, and thus do not
trigger getaddrinfo retries with a larger buffer, making
testing more predictable. */
resolv_response_section (b, ns_s_ar);
for (int i = 1; i <= address_count; ++i)
{
resolv_response_open_record (b, "ns.example", qclass, qtype, 0);
switch (qtype)
{
case T_A:
{
char ipv4[4] = {response_number, i >> 8, i, 0};
ipv4[3] = 2 * ctx->tcp + 4 * ctx->server_index;
resolv_response_add_data (b, &ipv4, sizeof (ipv4));
}
break;
case T_AAAA:
{
char ipv6[16]
= {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0,
response_number >> 8, response_number,
i >> 8, i, 0, 0};
ipv6[15] = 2 * ctx->tcp + 4 * ctx->server_index;
resolv_response_add_data (b, &ipv6, sizeof (ipv6));
}
break;
default:
support_record_failure ();
printf ("error: unexpected QTYPE: %s/%u/%u\n",
qname, qclass, qtype);
}
resolv_response_close_record (b);
}
}
}
static char *
expected_result (unsigned port, unsigned response_number)
{
struct xmemstream mem;
xopen_memstream (&mem);
/* We fail the second TCP query to the first server by closing the
connection immediately, without returning any data. This should
cause failover to the second server. */
int server_index = 1;
fprintf (mem.out, "address: STREAM/TCP 10.%u.%u.%u %u\n",
(response_number >> 8) & 0xff, response_number & 0xff,
2 + 4 * server_index, port);
fprintf (mem.out, "address: STREAM/TCP 2001:db8::%x:%x %u\n",
(response_number + 1) & 0xffff,
2 + 4 * server_index, port);
xfclose_memstream (&mem);
return mem.buffer;
}
static void
test_different_sizes (void)
{
struct addrinfo hints =
{
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_protocol = IPPROTO_TCP,
};
struct addrinfo *ai;
char *expected;
int ret;
/* This magic number produces a response size close to 2048
bytes. */
initial_address_count = 124;
response_number = 0;
ret = getaddrinfo ("www.example", "80", &hints, &ai);
expected = expected_result (80, 3);
check_addrinfo ("www.example:80", ai, ret, expected);
if (ret == 0)
freeaddrinfo (ai);
free (expected);
response_number = 0;
ret = getaddrinfo ("www123.example", "80", &hints, &ai);
if (ret == 0)
freeaddrinfo (ai);
response_number = 0;
ret = getaddrinfo ("www1234.example", "80", &hints, &ai);
if (ret == 0)
freeaddrinfo (ai);
response_number = 0;
ret = getaddrinfo ("www12345.example", "80", &hints, &ai);
if (ret == 0)
freeaddrinfo (ai);
}
static int
do_test (void)
{
struct resolv_test *obj = resolv_test_start
((struct resolv_redirect_config)
{
.response_callback = response
});
test_different_sizes ();
_res.options |= RES_SNGLKUP;
test_different_sizes ();
_res.options |= RES_SNGLKUPREOP;
test_different_sizes ();
resolv_test_end (obj);
return 0;
}
#include <support/test-driver.c>