139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/* Test for __libc_res_nsend buffer mismanagent (bug 18665), UDP case.
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Copyright (C) 2016-2022 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 <errno.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/resolv_test.h>
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#include <support/xthread.h>
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static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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static int initial_address_count;
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static int response_count;
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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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TEST_VERIFY_EXIT (qname != NULL);
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struct resolv_response_flags flags = {};
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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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resolv_response_section (b, ns_s_an);
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/* Add many A/AAAA records to the second response. */
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int address_count;
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xpthread_mutex_lock (&lock);
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if (response_count == 0)
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address_count = initial_address_count;
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else
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address_count = 2000;
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++response_count;
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xpthread_mutex_unlock (&lock);
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for (int i = 0; i < address_count; ++i)
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{
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resolv_response_open_record (b, qname, qclass, qtype, 0);
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switch (qtype)
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{
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case T_A:
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{
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char ipv4[4] = {10, i >> 8, i, 0};
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ipv4[3] = 2 * ctx->tcp + 4 * ctx->server_index;
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resolv_response_add_data (b, &ipv4, sizeof (ipv4));
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}
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break;
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case T_AAAA:
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{
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char ipv6[16]
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= {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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i >> 8, i, 0};
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ipv6[15] = 2 * ctx->tcp + 4 * ctx->server_index;
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resolv_response_add_data (b, &ipv6, sizeof (ipv6));
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}
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break;
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default:
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support_record_failure ();
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printf ("error: unexpected QTYPE: %s/%u/%u\n",
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qname, qclass, qtype);
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}
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resolv_response_close_record (b);
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}
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}
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static void
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test_different_sizes (void)
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{
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struct addrinfo hints = { .ai_family = AF_UNSPEC, };
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struct addrinfo *ai;
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int ret;
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/* This magic number produces a response size close to 2048
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bytes. */
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initial_address_count = 126;
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response_count = 0;
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ret = getaddrinfo ("www.example", "80", &hints, &ai);
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if (ret == 0)
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freeaddrinfo (ai);
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response_count = 0;
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ret = getaddrinfo ("www123.example", "80", &hints, &ai);
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if (ret == 0)
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freeaddrinfo (ai);
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response_count = 0;
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ret = getaddrinfo ("www1234.example", "80", &hints, &ai);
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if (ret == 0)
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freeaddrinfo (ai);
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response_count = 0;
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ret = getaddrinfo ("www12345.example", "80", &hints, &ai);
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if (ret == 0)
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freeaddrinfo (ai);
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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 *obj = 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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test_different_sizes ();
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_res.options |= RES_SNGLKUP;
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test_different_sizes ();
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_res.options |= RES_SNGLKUPREOP;
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test_different_sizes ();
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resolv_test_end (obj);
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return 0;
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}
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#include <support/test-driver.c>
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