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04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
504 lines
18 KiB
C
504 lines
18 KiB
C
/* Test basic nss_dns functionality and the resolver test harness itself.
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Copyright (C) 2016-2019 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/format_nss.h>
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#include <support/resolv_test.h>
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#include <support/support.h>
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#define LONG_NAME \
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaax." \
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay." \
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaz." \
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaat"
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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, long_name, nodata} 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 if (strcmp (qname_compare, LONG_NAME) == 0)
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requested_qname = long_name;
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else if (strcmp (qname_compare, "nodata.example") == 0)
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requested_qname = nodata;
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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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case long_name:
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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 nodata:
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return;
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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_hints (const char *name, const char *service,
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struct addrinfo hints, const char *expected)
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{
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struct addrinfo *ai;
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char *query = xasprintf ("%s:%s [%d]/0x%x", name, service,
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hints.ai_family, hints.ai_flags);
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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 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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return check_ai_hints (name, service,
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(struct addrinfo) { .ai_family = family, },
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expected);
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}
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/* Test for bug 21295: getaddrinfo used to discard address information
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instead of merging it. */
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static void
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test_bug_21295 (void)
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{
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/* The address order is unpredictable. There are two factors which
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contribute to that: The stub resolver does not perform proper
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response matching for A/AAAA queries (an A response could be
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associated with an AAAA query and vice versa), and without
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namespaces, system configuration could affect address
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ordering. */
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for (int do_tcp = 0; do_tcp < 2; ++do_tcp)
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{
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const struct addrinfo hints =
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{
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.ai_family = AF_INET6,
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.ai_socktype = SOCK_STREAM,
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.ai_flags = AI_V4MAPPED | AI_ALL,
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};
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const char *qname;
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if (do_tcp)
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qname = "t.www.example";
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else
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qname = "www.example";
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struct addrinfo *ai = NULL;
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int ret = getaddrinfo (qname, "80", &hints, &ai);
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TEST_VERIFY_EXIT (ret == 0);
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const char *expected_a;
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const char *expected_b;
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if (do_tcp)
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{
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expected_a = "flags: AI_V4MAPPED AI_ALL\n"
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"address: STREAM/TCP 2001:db8::3 80\n"
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"address: STREAM/TCP ::ffff:192.0.2.19 80\n";
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expected_b = "flags: AI_V4MAPPED AI_ALL\n"
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"address: STREAM/TCP ::ffff:192.0.2.19 80\n"
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"address: STREAM/TCP 2001:db8::3 80\n";
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}
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else
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{
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expected_a = "flags: AI_V4MAPPED AI_ALL\n"
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"address: STREAM/TCP 2001:db8::1 80\n"
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"address: STREAM/TCP ::ffff:192.0.2.17 80\n";
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expected_b = "flags: AI_V4MAPPED AI_ALL\n"
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"address: STREAM/TCP ::ffff:192.0.2.17 80\n"
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"address: STREAM/TCP 2001:db8::1 80\n";
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}
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char *actual = support_format_addrinfo (ai, ret);
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if (!(strcmp (actual, expected_a) == 0
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|| strcmp (actual, expected_b) == 0))
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{
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support_record_failure ();
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printf ("error: %s: unexpected response (TCP: %d):\n%s\n",
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__func__, do_tcp, actual);
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}
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free (actual);
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freeaddrinfo (ai);
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}
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}
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/* Run tests which do not expect any data. */
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static void
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test_nodata_nxdomain (void)
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{
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/* Iterate through different address families. */
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int families[] = { AF_UNSPEC, AF_INET, AF_INET6, -1 };
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for (int i = 0; families[i] >= 0; ++i)
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/* If do_tcp, prepend "t." to the name to trigger TCP
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fallback. */
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for (int do_tcp = 0; do_tcp < 2; ++do_tcp)
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/* If do_nxdomain, trigger an NXDOMAIN error (DNS failure),
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otherwise use a NODATA response (empty but successful
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answer). */
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for (int do_nxdomain = 0; do_nxdomain < 2; ++do_nxdomain)
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{
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int family = families[i];
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char *name = xasprintf ("%s%s.example",
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do_tcp ? "t." : "",
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do_nxdomain ? "nxdomain" : "nodata");
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if (family != AF_UNSPEC)
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{
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if (do_nxdomain)
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check_h (name, family, "error: HOST_NOT_FOUND\n");
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else
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check_h (name, family, "error: NO_ADDRESS\n");
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}
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const char *expected;
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if (do_nxdomain)
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expected = "error: Name or service not known\n";
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else
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expected = "error: No address associated with hostname\n";
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check_ai (name, "80", family, expected);
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struct addrinfo hints =
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{
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.ai_family = family,
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.ai_flags = AI_V4MAPPED | AI_ALL,
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};
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check_ai_hints (name, "80", hints, expected);
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hints.ai_flags |= AI_CANONNAME;
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check_ai_hints (name, "80", hints, expected);
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free (name);
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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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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_h (LONG_NAME, AF_INET,
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"name: " LONG_NAME "\n"
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"address: 192.0.2.20\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_hints ("www.example", "80",
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(struct addrinfo) { .ai_family = AF_UNSPEC,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\n"
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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_hints ("alias.example", "80",
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(struct addrinfo) { .ai_family = AF_UNSPEC,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\n"
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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 (LONG_NAME, "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 ("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_hints ("www.example", "80",
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(struct addrinfo) { .ai_family = AF_INET,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\n"
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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_hints ("alias.example", "80",
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(struct addrinfo) { .ai_family = AF_INET,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\n"
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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 (LONG_NAME, "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 ("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_hints ("www.example", "80",
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(struct addrinfo) { .ai_family = AF_INET6,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\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_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_ai_hints ("alias.example", "80",
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(struct addrinfo) { .ai_family = AF_INET6,
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.ai_flags = AI_CANONNAME, },
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"flags: AI_CANONNAME\n"
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"canonname: www.example\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");
|
|
check_ai (LONG_NAME, "80", AF_INET6,
|
|
"address: STREAM/TCP 2001:db8::4 80\n"
|
|
"address: DGRAM/UDP 2001:db8::4 80\n"
|
|
"address: RAW/IP 2001:db8::4 80\n");
|
|
|
|
check_h ("t.www.example", AF_INET,
|
|
"name: t.www.example\n"
|
|
"address: 192.0.2.19\n");
|
|
check_h ("t.alias.example", AF_INET,
|
|
"name: www.example\n"
|
|
"alias: t.alias.example\n"
|
|
"address: 192.0.2.20\n");
|
|
check_h ("t.www.example", AF_INET6,
|
|
"name: t.www.example\n"
|
|
"address: 2001:db8::3\n");
|
|
check_h ("t.alias.example", AF_INET6,
|
|
"name: www.example\n"
|
|
"alias: t.alias.example\n"
|
|
"address: 2001:db8::4\n");
|
|
check_ai ("t.www.example", "80", AF_UNSPEC,
|
|
"address: STREAM/TCP 192.0.2.19 80\n"
|
|
"address: DGRAM/UDP 192.0.2.19 80\n"
|
|
"address: RAW/IP 192.0.2.19 80\n"
|
|
"address: STREAM/TCP 2001:db8::3 80\n"
|
|
"address: DGRAM/UDP 2001:db8::3 80\n"
|
|
"address: RAW/IP 2001:db8::3 80\n");
|
|
check_ai ("t.alias.example", "80", AF_UNSPEC,
|
|
"address: STREAM/TCP 192.0.2.20 80\n"
|
|
"address: DGRAM/UDP 192.0.2.20 80\n"
|
|
"address: RAW/IP 192.0.2.20 80\n"
|
|
"address: STREAM/TCP 2001:db8::4 80\n"
|
|
"address: DGRAM/UDP 2001:db8::4 80\n"
|
|
"address: RAW/IP 2001:db8::4 80\n");
|
|
check_ai ("t.www.example", "80", AF_INET,
|
|
"address: STREAM/TCP 192.0.2.19 80\n"
|
|
"address: DGRAM/UDP 192.0.2.19 80\n"
|
|
"address: RAW/IP 192.0.2.19 80\n");
|
|
check_ai ("t.alias.example", "80", AF_INET,
|
|
"address: STREAM/TCP 192.0.2.20 80\n"
|
|
"address: DGRAM/UDP 192.0.2.20 80\n"
|
|
"address: RAW/IP 192.0.2.20 80\n");
|
|
check_ai ("t.www.example", "80", AF_INET6,
|
|
"address: STREAM/TCP 2001:db8::3 80\n"
|
|
"address: DGRAM/UDP 2001:db8::3 80\n"
|
|
"address: RAW/IP 2001:db8::3 80\n");
|
|
check_ai ("t.alias.example", "80", AF_INET6,
|
|
"address: STREAM/TCP 2001:db8::4 80\n"
|
|
"address: DGRAM/UDP 2001:db8::4 80\n"
|
|
"address: RAW/IP 2001:db8::4 80\n");
|
|
|
|
test_bug_21295 ();
|
|
test_nodata_nxdomain ();
|
|
|
|
resolv_test_end (aux);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|