| /* Test basic nss_dns functionality and the resolver test harness itself. |
| Copyright (C) 2016-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <support/check.h> |
| #include <support/check_nss.h> |
| #include <support/format_nss.h> |
| #include <support/resolv_test.h> |
| #include <support/support.h> |
| |
| #define LONG_NAME \ |
| "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaax." \ |
| "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay." \ |
| "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaz." \ |
| "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaat" |
| |
| 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); |
| |
| /* The "t." prefix can be used to request TCP fallback. */ |
| bool force_tcp; |
| if (strncmp ("t.", qname, 2) == 0) |
| force_tcp = true; |
| else |
| force_tcp = false; |
| const char *qname_compare; |
| if (force_tcp) |
| qname_compare = qname + 2; |
| else |
| qname_compare = qname; |
| enum {www, alias, nxdomain, long_name, nodata} requested_qname; |
| if (strcmp (qname_compare, "www.example") == 0) |
| requested_qname = www; |
| else if (strcmp (qname_compare, "alias.example") == 0) |
| requested_qname = alias; |
| else if (strcmp (qname_compare, "nxdomain.example") == 0) |
| requested_qname = nxdomain; |
| else if (strcmp (qname_compare, LONG_NAME) == 0) |
| requested_qname = long_name; |
| else if (strcmp (qname_compare, "nodata.example") == 0) |
| requested_qname = nodata; |
| else |
| { |
| support_record_failure (); |
| printf ("error: unexpected QNAME: %s\n", qname); |
| return; |
| } |
| TEST_VERIFY_EXIT (qclass == C_IN); |
| struct resolv_response_flags flags = {.tc = force_tcp && !ctx->tcp}; |
| if (requested_qname == nxdomain) |
| flags.rcode = 3; /* NXDOMAIN */ |
| resolv_response_init (b, flags); |
| resolv_response_add_question (b, qname, qclass, qtype); |
| if (requested_qname == nxdomain || flags.tc) |
| return; |
| |
| resolv_response_section (b, ns_s_an); |
| switch (requested_qname) |
| { |
| case www: |
| case long_name: |
| resolv_response_open_record (b, qname, qclass, qtype, 0); |
| break; |
| case alias: |
| resolv_response_open_record (b, qname, qclass, T_CNAME, 0); |
| resolv_response_add_name (b, "www.example"); |
| resolv_response_close_record (b); |
| resolv_response_open_record (b, "www.example", qclass, qtype, 0); |
| break; |
| case nodata: |
| return; |
| case nxdomain: |
| FAIL_EXIT1 ("unreachable"); |
| } |
| switch (qtype) |
| { |
| case T_A: |
| { |
| char ipv4[4] = {192, 0, 2, 17}; |
| ipv4[3] += requested_qname + 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, 0, 0, 0, 1}; |
| ipv6[15] += requested_qname + 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 void |
| check_h (const char *name, int family, const char *expected) |
| { |
| if (family == AF_INET) |
| { |
| char *query = xasprintf ("gethostbyname (\"%s\")", name); |
| check_hostent (query, gethostbyname (name), expected); |
| free (query); |
| } |
| { |
| char *query = xasprintf ("gethostbyname2 (\"%s\", %d)", name, family); |
| check_hostent (query, gethostbyname2 (name, family), expected); |
| free (query); |
| } |
| |
| bool too_small = true; |
| for (unsigned int offset = 0; offset < 8; ++offset) |
| for (unsigned int size = 1; too_small; ++size) |
| { |
| char *buf = xmalloc (offset + size); |
| too_small = false; |
| |
| struct hostent hostbuf; |
| struct hostent *result; |
| int herror; |
| if (family == AF_INET) |
| { |
| char *query = xasprintf ("gethostbyname (\"%s\") %u/%u", |
| name, offset, size); |
| int ret = gethostbyname_r |
| (name, &hostbuf, buf + offset, size, &result, &herror); |
| if (ret == 0) |
| { |
| h_errno = herror; |
| check_hostent (query, result, expected); |
| } |
| else if (ret == ERANGE) |
| too_small = true; |
| else |
| { |
| errno = ret; |
| FAIL_EXIT1 ("gethostbyname_r: %m"); |
| } |
| free (query); |
| memset (buf, 0, offset + size); |
| } |
| char *query = xasprintf ("gethostbyname2 (\"%s\", %d) %u/%u", |
| name, family, offset, size); |
| int ret = gethostbyname2_r |
| (name, family, &hostbuf, buf + offset, size, &result, &herror); |
| if (ret == 0) |
| { |
| h_errno = herror; |
| check_hostent (query, result, expected); |
| } |
| else if (ret == ERANGE) |
| too_small = true; |
| else |
| { |
| errno = ret; |
| FAIL_EXIT1 ("gethostbyname_r: %m"); |
| } |
| free (buf); |
| free (query); |
| } |
| } |
| |
| static void |
| check_ai_hints (const char *name, const char *service, |
| struct addrinfo hints, const char *expected) |
| { |
| struct addrinfo *ai; |
| char *query = xasprintf ("%s:%s [%d]/0x%x", name, service, |
| hints.ai_family, hints.ai_flags); |
| int ret = getaddrinfo (name, service, &hints, &ai); |
| check_addrinfo (query, ai, ret, expected); |
| if (ret == 0) |
| freeaddrinfo (ai); |
| free (query); |
| } |
| |
| static void |
| check_ai (const char *name, const char *service, |
| int family, const char *expected) |
| { |
| return check_ai_hints (name, service, |
| (struct addrinfo) { .ai_family = family, }, |
| expected); |
| } |
| |
| /* Test for bug 21295: getaddrinfo used to discard address information |
| instead of merging it. */ |
| static void |
| test_bug_21295 (void) |
| { |
| /* The address order is unpredictable. There are two factors which |
| contribute to that: The stub resolver does not perform proper |
| response matching for A/AAAA queries (an A response could be |
| associated with an AAAA query and vice versa), and without |
| namespaces, system configuration could affect address |
| ordering. */ |
| for (int do_tcp = 0; do_tcp < 2; ++do_tcp) |
| { |
| const struct addrinfo hints = |
| { |
| .ai_family = AF_INET6, |
| .ai_socktype = SOCK_STREAM, |
| .ai_flags = AI_V4MAPPED | AI_ALL, |
| }; |
| const char *qname; |
| if (do_tcp) |
| qname = "t.www.example"; |
| else |
| qname = "www.example"; |
| struct addrinfo *ai = NULL; |
| int ret = getaddrinfo (qname, "80", &hints, &ai); |
| TEST_VERIFY_EXIT (ret == 0); |
| |
| const char *expected_a; |
| const char *expected_b; |
| if (do_tcp) |
| { |
| expected_a = "flags: AI_V4MAPPED AI_ALL\n" |
| "address: STREAM/TCP 2001:db8::3 80\n" |
| "address: STREAM/TCP ::ffff:192.0.2.19 80\n"; |
| expected_b = "flags: AI_V4MAPPED AI_ALL\n" |
| "address: STREAM/TCP ::ffff:192.0.2.19 80\n" |
| "address: STREAM/TCP 2001:db8::3 80\n"; |
| } |
| else |
| { |
| expected_a = "flags: AI_V4MAPPED AI_ALL\n" |
| "address: STREAM/TCP 2001:db8::1 80\n" |
| "address: STREAM/TCP ::ffff:192.0.2.17 80\n"; |
| expected_b = "flags: AI_V4MAPPED AI_ALL\n" |
| "address: STREAM/TCP ::ffff:192.0.2.17 80\n" |
| "address: STREAM/TCP 2001:db8::1 80\n"; |
| } |
| |
| char *actual = support_format_addrinfo (ai, ret); |
| if (!(strcmp (actual, expected_a) == 0 |
| || strcmp (actual, expected_b) == 0)) |
| { |
| support_record_failure (); |
| printf ("error: %s: unexpected response (TCP: %d):\n%s\n", |
| __func__, do_tcp, actual); |
| } |
| free (actual); |
| freeaddrinfo (ai); |
| } |
| } |
| |
| /* Run tests which do not expect any data. */ |
| static void |
| test_nodata_nxdomain (void) |
| { |
| /* Iterate through different address families. */ |
| int families[] = { AF_UNSPEC, AF_INET, AF_INET6, -1 }; |
| for (int i = 0; families[i] >= 0; ++i) |
| /* If do_tcp, prepend "t." to the name to trigger TCP |
| fallback. */ |
| for (int do_tcp = 0; do_tcp < 2; ++do_tcp) |
| /* If do_nxdomain, trigger an NXDOMAIN error (DNS failure), |
| otherwise use a NODATA response (empty but successful |
| answer). */ |
| for (int do_nxdomain = 0; do_nxdomain < 2; ++do_nxdomain) |
| { |
| int family = families[i]; |
| char *name = xasprintf ("%s%s.example", |
| do_tcp ? "t." : "", |
| do_nxdomain ? "nxdomain" : "nodata"); |
| |
| if (family != AF_UNSPEC) |
| { |
| if (do_nxdomain) |
| check_h (name, family, "error: HOST_NOT_FOUND\n"); |
| else |
| check_h (name, family, "error: NO_ADDRESS\n"); |
| } |
| |
| const char *expected; |
| if (do_nxdomain) |
| expected = "error: Name or service not known\n"; |
| else |
| expected = "error: No address associated with hostname\n"; |
| |
| check_ai (name, "80", family, expected); |
| |
| struct addrinfo hints = |
| { |
| .ai_family = family, |
| .ai_flags = AI_V4MAPPED | AI_ALL, |
| }; |
| check_ai_hints (name, "80", hints, expected); |
| hints.ai_flags |= AI_CANONNAME; |
| check_ai_hints (name, "80", hints, expected); |
| |
| free (name); |
| } |
| } |
| |
| static int |
| do_test (void) |
| { |
| struct resolv_test *aux = resolv_test_start |
| ((struct resolv_redirect_config) |
| { |
| .response_callback = response, |
| }); |
| |
| check_h ("www.example", AF_INET, |
| "name: www.example\n" |
| "address: 192.0.2.17\n"); |
| check_h ("alias.example", AF_INET, |
| "name: www.example\n" |
| "alias: alias.example\n" |
| "address: 192.0.2.18\n"); |
| check_h ("www.example", AF_INET6, |
| "name: www.example\n" |
| "address: 2001:db8::1\n"); |
| check_h ("alias.example", AF_INET6, |
| "name: www.example\n" |
| "alias: alias.example\n" |
| "address: 2001:db8::2\n"); |
| check_h (LONG_NAME, AF_INET, |
| "name: " LONG_NAME "\n" |
| "address: 192.0.2.20\n"); |
| |
| check_ai ("www.example", "80", AF_UNSPEC, |
| "address: STREAM/TCP 192.0.2.17 80\n" |
| "address: DGRAM/UDP 192.0.2.17 80\n" |
| "address: RAW/IP 192.0.2.17 80\n" |
| "address: STREAM/TCP 2001:db8::1 80\n" |
| "address: DGRAM/UDP 2001:db8::1 80\n" |
| "address: RAW/IP 2001:db8::1 80\n"); |
| check_ai_hints ("www.example", "80", |
| (struct addrinfo) { .ai_family = AF_UNSPEC, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 192.0.2.17 80\n" |
| "address: DGRAM/UDP 192.0.2.17 80\n" |
| "address: RAW/IP 192.0.2.17 80\n" |
| "address: STREAM/TCP 2001:db8::1 80\n" |
| "address: DGRAM/UDP 2001:db8::1 80\n" |
| "address: RAW/IP 2001:db8::1 80\n"); |
| check_ai ("alias.example", "80", AF_UNSPEC, |
| "address: STREAM/TCP 192.0.2.18 80\n" |
| "address: DGRAM/UDP 192.0.2.18 80\n" |
| "address: RAW/IP 192.0.2.18 80\n" |
| "address: STREAM/TCP 2001:db8::2 80\n" |
| "address: DGRAM/UDP 2001:db8::2 80\n" |
| "address: RAW/IP 2001:db8::2 80\n"); |
| check_ai_hints ("alias.example", "80", |
| (struct addrinfo) { .ai_family = AF_UNSPEC, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 192.0.2.18 80\n" |
| "address: DGRAM/UDP 192.0.2.18 80\n" |
| "address: RAW/IP 192.0.2.18 80\n" |
| "address: STREAM/TCP 2001:db8::2 80\n" |
| "address: DGRAM/UDP 2001:db8::2 80\n" |
| "address: RAW/IP 2001:db8::2 80\n"); |
| check_ai (LONG_NAME, "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 ("www.example", "80", AF_INET, |
| "address: STREAM/TCP 192.0.2.17 80\n" |
| "address: DGRAM/UDP 192.0.2.17 80\n" |
| "address: RAW/IP 192.0.2.17 80\n"); |
| check_ai_hints ("www.example", "80", |
| (struct addrinfo) { .ai_family = AF_INET, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 192.0.2.17 80\n" |
| "address: DGRAM/UDP 192.0.2.17 80\n" |
| "address: RAW/IP 192.0.2.17 80\n"); |
| check_ai ("alias.example", "80", AF_INET, |
| "address: STREAM/TCP 192.0.2.18 80\n" |
| "address: DGRAM/UDP 192.0.2.18 80\n" |
| "address: RAW/IP 192.0.2.18 80\n"); |
| check_ai_hints ("alias.example", "80", |
| (struct addrinfo) { .ai_family = AF_INET, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 192.0.2.18 80\n" |
| "address: DGRAM/UDP 192.0.2.18 80\n" |
| "address: RAW/IP 192.0.2.18 80\n"); |
| check_ai (LONG_NAME, "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 ("www.example", "80", AF_INET6, |
| "address: STREAM/TCP 2001:db8::1 80\n" |
| "address: DGRAM/UDP 2001:db8::1 80\n" |
| "address: RAW/IP 2001:db8::1 80\n"); |
| check_ai_hints ("www.example", "80", |
| (struct addrinfo) { .ai_family = AF_INET6, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 2001:db8::1 80\n" |
| "address: DGRAM/UDP 2001:db8::1 80\n" |
| "address: RAW/IP 2001:db8::1 80\n"); |
| check_ai ("alias.example", "80", AF_INET6, |
| "address: STREAM/TCP 2001:db8::2 80\n" |
| "address: DGRAM/UDP 2001:db8::2 80\n" |
| "address: RAW/IP 2001:db8::2 80\n"); |
| check_ai_hints ("alias.example", "80", |
| (struct addrinfo) { .ai_family = AF_INET6, |
| .ai_flags = AI_CANONNAME, }, |
| "flags: AI_CANONNAME\n" |
| "canonname: www.example\n" |
| "address: STREAM/TCP 2001:db8::2 80\n" |
| "address: DGRAM/UDP 2001:db8::2 80\n" |
| "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> |
