mirror of
git://sourceware.org/git/glibc.git
synced 2026-09-08 23:58:31 +08:00
Florian Weimer
40ddd85420
The test skeleton was auto-generated. I think this is fine because the harness is so specific to glibc. Assisted-by: LLM Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/* Test res_queriesmatch buffer handling (bug 34345, bug 34346).
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Copyright (C) 2026 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <netdb.h>
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#include <resolv.h>
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#include <support/check.h>
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#include <support/check_nss.h>
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#include <support/resolv_test.h>
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static void
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response (const struct resolv_response_context *ctx,
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struct resolv_response_builder *b,
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const char *qname, uint16_t qclass, uint16_t qtype)
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{
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switch (ctx->server_index)
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{
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case 0:
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{
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struct resolv_response_flags flags = { .rcode = 3 }; /* NXDOMAIN. */
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resolv_response_init (b, flags);
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resolv_response_add_question (b, qname, qclass, qtype);
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/* Cause a mismatch in the transaction ID. */
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*resolv_response_buffer (b) ^= 1;
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}
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break;
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case 1:
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{
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struct resolv_response_flags flags = { .rcode = 3 }; /* NXDOMAIN. */
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resolv_response_init (b, flags);
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resolv_response_add_question (b, qname, qclass, qtype);
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/* Truncate the packet. If bug 34346 is present, this
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response will be accepted because the final byte (which is
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overread) has the expected value, carried over from the
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previous response. With bug 34345, the response is
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accepted (as NXDOMAIN) because the packet is corrupt. */
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resolv_response_set_buffer (b,
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resolv_response_buffer (b),
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resolv_response_length (b) - 1);
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}
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break;
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case 2:
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{
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/* Finally, provide a valid response. With either bug
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present, this is never reached because the stub resolver
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uses the response from the second server above. */
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resolv_response_init (b, (struct resolv_response_flags) {});
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resolv_response_add_question (b, qname, qclass, qtype);
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resolv_response_section (b, ns_s_an);
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resolv_response_open_record (b, qname, qclass, qtype, 0);
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char ipv4[4] = { 192, 0, 2, 17 };
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resolv_response_add_data (b, &ipv4, sizeof (ipv4));
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resolv_response_close_record (b);
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}
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break;
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}
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}
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static int
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do_test (void)
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{
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struct resolv_test *aux = resolv_test_start
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((struct resolv_redirect_config)
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{
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.response_callback = response,
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});
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/* Reduce test run time. The test hits multiple timeouts as it
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switches between name server. */
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_res.retrans = 1;
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_res.retry = 1;
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struct addrinfo hints =
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{
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.ai_family = AF_INET,
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.ai_socktype = SOCK_STREAM,
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};
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struct addrinfo *ai;
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int ret = getaddrinfo ("www.example", "80", &hints, &ai);
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check_addrinfo ("www.example", ai, ret,
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"address: STREAM/TCP 192.0.2.17 80\n");
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if (ret == 0)
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freeaddrinfo (ai);
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resolv_test_end (aux);
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return 0;
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}
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#include <support/test-driver.c>
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