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resolv: Add beginnings of a libresolv test suite
This commit is contained in:
Florian Weimer
315
resolv/tst-resolv-basic.c
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315
resolv/tst-resolv-basic.c
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/* Test basic nss_dns functionality and the resolver test harness itself.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.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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#include <support/support.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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TEST_VERIFY_EXIT (qname != NULL);
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/* The "t." prefix can be used to request TCP fallback. */
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bool force_tcp;
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if (strncmp ("t.", qname, 2) == 0)
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force_tcp = true;
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else
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force_tcp = false;
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const char *qname_compare;
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if (force_tcp)
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qname_compare = qname + 2;
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else
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qname_compare = qname;
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enum {www, alias, nxdomain} requested_qname;
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if (strcmp (qname_compare, "www.example") == 0)
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requested_qname = www;
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else if (strcmp (qname_compare, "alias.example") == 0)
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requested_qname = alias;
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else if (strcmp (qname_compare, "nxdomain.example") == 0)
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requested_qname = nxdomain;
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else
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{
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support_record_failure ();
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printf ("error: unexpected QNAME: %s\n", qname);
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return;
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}
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TEST_VERIFY_EXIT (qclass == C_IN);
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struct resolv_response_flags flags = {.tc = force_tcp && !ctx->tcp};
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if (requested_qname == nxdomain)
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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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if (requested_qname == nxdomain || flags.tc)
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return;
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resolv_response_section (b, ns_s_an);
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switch (requested_qname)
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{
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case www:
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resolv_response_open_record (b, qname, qclass, qtype, 0);
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break;
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case alias:
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resolv_response_open_record (b, qname, qclass, T_CNAME, 0);
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resolv_response_add_name (b, "www.example");
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resolv_response_close_record (b);
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resolv_response_open_record (b, "www.example", qclass, qtype, 0);
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break;
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case nxdomain:
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FAIL_EXIT1 ("unreachable");
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}
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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] = {192, 0, 2, 17};
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ipv4[3] += requested_qname + 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, 0, 0, 1};
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ipv6[15] += requested_qname + 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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static void
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check_h (const char *name, int family, const char *expected)
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{
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if (family == AF_INET)
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{
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char *query = xasprintf ("gethostbyname (\"%s\")", name);
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check_hostent (query, gethostbyname (name), expected);
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free (query);
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}
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{
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char *query = xasprintf ("gethostbyname2 (\"%s\", %d)", name, family);
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check_hostent (query, gethostbyname2 (name, family), expected);
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free (query);
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}
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bool too_small = true;
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for (unsigned int offset = 0; offset < 8; ++offset)
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for (unsigned int size = 1; too_small; ++size)
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{
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char *buf = xmalloc (offset + size);
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too_small = false;
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struct hostent hostbuf;
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struct hostent *result;
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int herror;
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if (family == AF_INET)
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{
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char *query = xasprintf ("gethostbyname (\"%s\") %u/%u",
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name, offset, size);
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int ret = gethostbyname_r
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(name, &hostbuf, buf + offset, size, &result, &herror);
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if (ret == 0)
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{
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h_errno = herror;
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check_hostent (query, result, expected);
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}
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else if (ret == ERANGE)
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too_small = true;
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else
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{
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errno = ret;
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FAIL_EXIT1 ("gethostbyname_r: %m");
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}
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free (query);
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memset (buf, 0, offset + size);
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}
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char *query = xasprintf ("gethostbyname2 (\"%s\", %d) %u/%u",
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name, family, offset, size);
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int ret = gethostbyname2_r
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(name, family, &hostbuf, buf + offset, size, &result, &herror);
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if (ret == 0)
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{
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h_errno = herror;
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check_hostent (query, result, expected);
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}
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else if (ret == ERANGE)
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too_small = true;
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else
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{
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errno = ret;
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FAIL_EXIT1 ("gethostbyname_r: %m");
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}
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free (buf);
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free (query);
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}
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}
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static void
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check_ai (const char *name, const char *service,
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int family, const char *expected)
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{
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struct addrinfo hints = {.ai_family = family};
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struct addrinfo *ai;
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char *query = xasprintf ("%s:%s [%d]", name, service, family);
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int ret = getaddrinfo (name, service, &hints, &ai);
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check_addrinfo (query, ai, ret, expected);
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if (ret == 0)
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freeaddrinfo (ai);
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free (query);
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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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check_h ("www.example", AF_INET,
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"name: www.example\n"
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"address: 192.0.2.17\n");
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check_h ("alias.example", AF_INET,
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"name: www.example\n"
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"alias: alias.example\n"
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"address: 192.0.2.18\n");
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check_h ("www.example", AF_INET6,
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"name: www.example\n"
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"address: 2001:db8::1\n");
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check_h ("alias.example", AF_INET6,
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"name: www.example\n"
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"alias: alias.example\n"
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"address: 2001:db8::2\n");
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check_ai ("www.example", "80", AF_UNSPEC,
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"address: STREAM/TCP 192.0.2.17 80\n"
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"address: DGRAM/UDP 192.0.2.17 80\n"
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"address: RAW/IP 192.0.2.17 80\n"
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"address: STREAM/TCP 2001:db8::1 80\n"
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"address: DGRAM/UDP 2001:db8::1 80\n"
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"address: RAW/IP 2001:db8::1 80\n");
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check_ai ("alias.example", "80", AF_UNSPEC,
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"address: STREAM/TCP 192.0.2.18 80\n"
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"address: DGRAM/UDP 192.0.2.18 80\n"
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"address: RAW/IP 192.0.2.18 80\n"
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"address: STREAM/TCP 2001:db8::2 80\n"
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"address: DGRAM/UDP 2001:db8::2 80\n"
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"address: RAW/IP 2001:db8::2 80\n");
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check_ai ("www.example", "80", AF_INET,
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"address: STREAM/TCP 192.0.2.17 80\n"
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"address: DGRAM/UDP 192.0.2.17 80\n"
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"address: RAW/IP 192.0.2.17 80\n");
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check_ai ("alias.example", "80", AF_INET,
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"address: STREAM/TCP 192.0.2.18 80\n"
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"address: DGRAM/UDP 192.0.2.18 80\n"
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"address: RAW/IP 192.0.2.18 80\n");
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check_ai ("www.example", "80", AF_INET6,
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"address: STREAM/TCP 2001:db8::1 80\n"
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"address: DGRAM/UDP 2001:db8::1 80\n"
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"address: RAW/IP 2001:db8::1 80\n");
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check_ai ("alias.example", "80", AF_INET6,
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"address: STREAM/TCP 2001:db8::2 80\n"
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"address: DGRAM/UDP 2001:db8::2 80\n"
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"address: RAW/IP 2001:db8::2 80\n");
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check_h ("t.www.example", AF_INET,
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"name: t.www.example\n"
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"address: 192.0.2.19\n");
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check_h ("t.alias.example", AF_INET,
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"name: www.example\n"
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"alias: t.alias.example\n"
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"address: 192.0.2.20\n");
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check_h ("t.www.example", AF_INET6,
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"name: t.www.example\n"
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"address: 2001:db8::3\n");
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check_h ("t.alias.example", AF_INET6,
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"name: www.example\n"
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"alias: t.alias.example\n"
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"address: 2001:db8::4\n");
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check_ai ("t.www.example", "80", AF_UNSPEC,
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"address: STREAM/TCP 192.0.2.19 80\n"
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"address: DGRAM/UDP 192.0.2.19 80\n"
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"address: RAW/IP 192.0.2.19 80\n"
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"address: STREAM/TCP 2001:db8::3 80\n"
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"address: DGRAM/UDP 2001:db8::3 80\n"
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"address: RAW/IP 2001:db8::3 80\n");
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check_ai ("t.alias.example", "80", AF_UNSPEC,
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"address: STREAM/TCP 192.0.2.20 80\n"
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"address: DGRAM/UDP 192.0.2.20 80\n"
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"address: RAW/IP 192.0.2.20 80\n"
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"address: STREAM/TCP 2001:db8::4 80\n"
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"address: DGRAM/UDP 2001:db8::4 80\n"
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"address: RAW/IP 2001:db8::4 80\n");
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check_ai ("t.www.example", "80", AF_INET,
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"address: STREAM/TCP 192.0.2.19 80\n"
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"address: DGRAM/UDP 192.0.2.19 80\n"
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"address: RAW/IP 192.0.2.19 80\n");
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check_ai ("t.alias.example", "80", AF_INET,
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"address: STREAM/TCP 192.0.2.20 80\n"
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"address: DGRAM/UDP 192.0.2.20 80\n"
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"address: RAW/IP 192.0.2.20 80\n");
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check_ai ("t.www.example", "80", AF_INET6,
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"address: STREAM/TCP 2001:db8::3 80\n"
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"address: DGRAM/UDP 2001:db8::3 80\n"
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"address: RAW/IP 2001:db8::3 80\n");
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check_ai ("t.alias.example", "80", AF_INET6,
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"address: STREAM/TCP 2001:db8::4 80\n"
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"address: DGRAM/UDP 2001:db8::4 80\n"
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"address: RAW/IP 2001:db8::4 80\n");
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check_h ("nxdomain.example", AF_INET,
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"error: HOST_NOT_FOUND\n");
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check_h ("nxdomain.example", AF_INET6,
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"error: HOST_NOT_FOUND\n");
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check_ai ("nxdomain.example", "80", AF_UNSPEC,
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"error: Name or service not known\n");
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check_ai ("nxdomain.example", "80", AF_INET,
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"error: Name or service not known\n");
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check_ai ("nxdomain.example", "80", AF_INET6,
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"error: Name or service not known\n");
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check_h ("t.nxdomain.example", AF_INET,
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"error: HOST_NOT_FOUND\n");
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check_h ("t.nxdomain.example", AF_INET6,
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"error: HOST_NOT_FOUND\n");
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check_ai ("t.nxdomain.example", "80", AF_UNSPEC,
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"error: Name or service not known\n");
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check_ai ("t.nxdomain.example", "80", AF_INET,
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"error: Name or service not known\n");
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check_ai ("t.nxdomain.example", "80", AF_INET6,
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"error: Name or service not known\n");
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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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