/* Basic functionality tests for inet6 option processing. Copyright (C) 2016-2019 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 . */ #include #include #include #include #include #include #include #include #include #include #include /* Handle IPv4 reverse lookup responses. Product a PTR record A-B-C-D.v4.example. */ static void response_ptr_v4 (const struct resolv_response_context *ctx, struct resolv_response_builder *b, const char *qname, uint16_t qclass, uint16_t qtype) { int bytes[4]; int offset = -1; TEST_VERIFY (sscanf (qname, "%d.%d.%d.%d.in-addr.arpa%n", bytes + 0, bytes + 1, bytes + 2, bytes + 3, &offset) == 4); TEST_VERIFY (offset == strlen (qname)); resolv_response_init (b, (struct resolv_response_flags) {}); resolv_response_add_question (b, qname, qclass, qtype); resolv_response_section (b, ns_s_an); resolv_response_open_record (b, qname, qclass, T_PTR, 0); char *name = xasprintf ("%d-%d-%d-%d.v4.example", bytes[3], bytes[2], bytes[1], bytes[0]); resolv_response_add_name (b, name); free (name); resolv_response_close_record (b); } /* Handle IPv6 reverse lookup responses. Produce a PTR record <32 hex digits>.v6.example. */ static void response_ptr_v6 (const struct resolv_response_context *ctx, struct resolv_response_builder *b, const char *qname, uint16_t qclass, uint16_t qtype) { TEST_VERIFY_EXIT (strlen (qname) > 64); char bytes[33]; for (int i = 0; i < 64; ++i) if ((i % 2) == 0) { TEST_VERIFY (isxdigit ((unsigned char) qname[i])); bytes[31 - i / 2] = qname[i]; } else TEST_VERIFY_EXIT (qname[i] == '.'); bytes[32] = '\0'; resolv_response_init (b, (struct resolv_response_flags) {}); resolv_response_add_question (b, qname, qclass, qtype); resolv_response_section (b, ns_s_an); resolv_response_open_record (b, qname, qclass, T_PTR, 0); char *name = xasprintf ("%s.v6.example", bytes); resolv_response_add_name (b, name); free (name); resolv_response_close_record (b); } /* Produce a response based on QNAME: Certain characters in the first label of QNAME trigger the inclusion of resource records: 'a' A record (IPv4 address) 'q' AAAA record (quad A record, IPv6 address) 'p' PTR record 'm' record type must match QTYPE (no additional records) '6' stop flag processing if QTYPE == AAAA For 'a' and 'q', QTYPE is ignored for record type selection if 'm' is not specified. in-addr.arpa and ip6.arpa queries are handled separately in response_ptr_v4 and response_ptr_v6. */ static void response (const struct resolv_response_context *ctx, struct resolv_response_builder *b, const char *qname, uint16_t qclass, uint16_t qtype) { if (strstr (qname, ".in-addr.arpa") != NULL) return response_ptr_v4 (ctx, b, qname, qclass, qtype); else if (strstr (qname, ".ip6.arpa") != NULL) return response_ptr_v6 (ctx, b, qname, qclass, qtype); bool include_a = false; bool include_aaaa = false; bool include_match = false; bool include_ptr = false; for (const char *p = qname; *p != '.' && *p != '\0'; ++p) { if (*p == 'a') include_a = true; else if (*p == 'q') include_aaaa = true; else if (*p == 'm') include_match = true; else if (*p == 'p') include_ptr = true; else if (*p == '6' && qtype == T_AAAA) break; } if (include_match) { if (qtype == T_A) include_aaaa = false; else if (qtype == T_AAAA) include_a = false; } resolv_response_init (b, (struct resolv_response_flags) {}); resolv_response_add_question (b, qname, qclass, qtype); resolv_response_section (b, ns_s_an); if (include_a) { char ipv4[4] = {192, 0, 2, 17}; resolv_response_open_record (b, qname, qclass, T_A, 0); resolv_response_add_data (b, &ipv4, sizeof (ipv4)); resolv_response_close_record (b); } if (include_aaaa) { char ipv6[16] = {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; resolv_response_open_record (b, qname, qclass, T_AAAA, 0); resolv_response_add_data (b, &ipv6, sizeof (ipv6)); resolv_response_close_record (b); } if (include_ptr) { resolv_response_open_record (b, qname, qclass, T_PTR, 0); resolv_response_add_name (b, "ptr-target.example"); resolv_response_close_record (b); } } /* Test that getaddrinfo is not influenced by RES_USE_INET6. */ static void test_gai (void) { { struct addrinfo hints = { .ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM, .ai_protocol = IPPROTO_TCP, }; struct addrinfo *ai; int ret = getaddrinfo ("qam.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_UNSPEC qam.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n" "address: STREAM/TCP 2001:db8::1 80\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("am.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_UNSPEC am.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("qa.example", "80", &hints, &ai); /* Combined A/AAAA responses currently result in address duplication. */ check_addrinfo ("getaddrinfo AF_UNSPEC qa.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n" "address: STREAM/TCP 192.0.2.17 80\n" "address: STREAM/TCP 2001:db8::1 80\n" "address: STREAM/TCP 2001:db8::1 80\n"); if (ret == 0) freeaddrinfo (ai); } { struct addrinfo hints = { .ai_family = AF_INET, .ai_socktype = SOCK_STREAM, .ai_protocol = IPPROTO_TCP, }; struct addrinfo *ai; int ret = getaddrinfo ("qam.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_INET qam.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("am.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_INET am.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("qa.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_INET qa.example", ai, ret, "address: STREAM/TCP 192.0.2.17 80\n"); if (ret == 0) freeaddrinfo (ai); } { struct addrinfo hints = { .ai_family = AF_INET6, .ai_socktype = SOCK_STREAM, .ai_protocol = IPPROTO_TCP, }; struct addrinfo *ai; int ret = getaddrinfo ("qa.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo (AF_INET6)", ai, ret, "address: STREAM/TCP 2001:db8::1 80\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("am.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_INET6 am.example", ai, ret, "error: No address associated with hostname\n"); if (ret == 0) freeaddrinfo (ai); ret = getaddrinfo ("qam.example", "80", &hints, &ai); check_addrinfo ("getaddrinfo AF_INET6 qam.example", ai, ret, "address: STREAM/TCP 2001:db8::1 80\n"); if (ret == 0) freeaddrinfo (ai); } } /* Test gethostbyaddr and getnameinfo. The results are independent of RES_USE_INET6. */ static void test_reverse (void) { { char ipv4[4] = { 192, 0, 2, 17 }; check_hostent ("gethostbyaddr AF_INET", gethostbyaddr (ipv4, sizeof (ipv4), AF_INET), "name: 192-0-2-17.v4.example\n" "address: 192.0.2.17\n"); } { char ipv6[16] = {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; check_hostent ("gethostbyaddr AF_INET", gethostbyaddr (ipv6, sizeof (ipv6), AF_INET6), "name: 20010db8000000000000000000000001.v6.example\n" "address: 2001:db8::1\n"); } { struct sockaddr_in addr = { .sin_family = AF_INET, .sin_addr = { .s_addr = htonl (0xc0000211) }, .sin_port = htons (80) }; char host[NI_MAXHOST]; char service[NI_MAXSERV]; int ret = getnameinfo ((struct sockaddr *) &addr, sizeof (addr), host, sizeof (host), service, sizeof (service), NI_NUMERICSERV); TEST_VERIFY (ret == 0); TEST_VERIFY (strcmp (host, "192-0-2-17.v4.example") == 0); TEST_VERIFY (strcmp (service, "80") == 0); } { char ipv6[16] = {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; struct sockaddr_in6 addr = { .sin6_family = AF_INET6, .sin6_port = htons (80), }; TEST_VERIFY (sizeof (ipv6) == sizeof (addr.sin6_addr)); memcpy (&addr.sin6_addr, ipv6, sizeof (addr.sin6_addr)); char host[NI_MAXHOST]; char service[NI_MAXSERV]; int ret = getnameinfo ((struct sockaddr *) &addr, sizeof (addr), host, sizeof (host), service, sizeof (service), NI_NUMERICSERV); TEST_VERIFY (ret == 0); TEST_VERIFY (strcmp (host, "20010db8000000000000000000000001.v6.example") == 0); TEST_VERIFY (strcmp (service, "80") == 0); } } /* Test that gethostbyname2 is mostly not influenced by RES_USE_INET6. */ static void test_get2_any (void) { check_hostent ("gethostbyname2 AF_INET am.example", gethostbyname2 ("am.example", AF_INET), "name: am.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname2 AF_INET a.example", gethostbyname2 ("a.example", AF_INET), "name: a.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname2 AF_INET qm.example", gethostbyname2 ("qm.example", AF_INET), "error: NO_ADDRESS\n"); check_hostent ("gethostbyname2 AF_INET q.example", gethostbyname2 ("q.example", AF_INET), "error: NO_RECOVERY\n"); check_hostent ("gethostbyname2 AF_INET qam.example", gethostbyname2 ("qam.example", AF_INET), "name: qam.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname2 AF_INET qa.example", gethostbyname2 ("qa.example", AF_INET), "name: qa.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname2 AF_INET6 qm.example", gethostbyname2 ("qm.example", AF_INET6), "name: qm.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname2 AF_INET6 q.example", gethostbyname2 ("q.example", AF_INET6), "name: q.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname2 AF_INET6 qam.example", gethostbyname2 ("qam.example", AF_INET6), "name: qam.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname2 AF_INET6 qa.example", gethostbyname2 ("qa.example", AF_INET6), "name: qa.example\n" "address: 2001:db8::1\n"); /* Additional AF_INET6 tests depend on RES_USE_INET6; see below. */ test_reverse (); } /* gethostbyname2 tests with RES_USE_INET6 disabled. */ static void test_get2_no_inet6 (void) { test_get2_any (); check_hostent ("gethostbyname2 AF_INET6 am.example", gethostbyname2 ("am.example", AF_INET6), "error: NO_ADDRESS\n"); check_hostent ("gethostbyname2 AF_INET6 a.example", gethostbyname2 ("a.example", AF_INET6), "error: NO_RECOVERY\n"); } /* gethostbyname2 tests with RES_USE_INET6 enabled. */ static void test_get2_inet6 (void) { test_get2_any (); check_hostent ("gethostbyname2 AF_INET6 am.example", gethostbyname2 ("am.example", AF_INET6), "name: am.example\n" "address: ::ffff:192.0.2.17\n"); check_hostent ("gethostbyname2 AF_INET6 a.example", gethostbyname2 ("a.example", AF_INET6), "error: NO_RECOVERY\n"); } /* Collection of tests which assume no RES_USE_INET6 flag. */ static void test_no_inet6 (void) { check_hostent ("gethostbyname (\"a.example\")", gethostbyname ("a.example"), "name: a.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname (\"qa.example\")", gethostbyname ("qa.example"), "name: qa.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname (\"am.example\")", gethostbyname ("am.example"), "name: am.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname (\"amp.example\")", gethostbyname ("amp.example"), "name: amp.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname (\"qam.example\")", gethostbyname ("qam.example"), "name: qam.example\n" "address: 192.0.2.17\n"); check_hostent ("gethostbyname (\"q.example\")", gethostbyname ("q.example"), "error: NO_RECOVERY\n"); check_hostent ("gethostbyname (\"qm.example\")", gethostbyname ("qm.example"), "error: NO_ADDRESS\n"); test_get2_no_inet6 (); test_get2_no_inet6 (); test_gai (); test_get2_no_inet6 (); test_get2_no_inet6 (); } static void * threadfunc (void *ignored) { struct resolv_test *obj = resolv_test_start ((struct resolv_redirect_config) { .response_callback = response }); TEST_VERIFY ((_res.options & RES_USE_INET6) == 0); test_no_inet6 (); _res.options |= RES_USE_INET6; check_hostent ("gethostbyname (\"a.inet6.example\")", gethostbyname ("a.inet6.example"), "error: NO_RECOVERY\n"); check_hostent ("gethostbyname (\"am.inet6.example\")", gethostbyname ("am.inet6.example"), "name: am.inet6.example\n" "address: ::ffff:192.0.2.17\n"); check_hostent ("gethostbyname (\"qa.inet6.example\")", gethostbyname ("qa.inet6.example"), "name: qa.inet6.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname (\"qam.inet6.example\")", gethostbyname ("qam.inet6.example"), "name: qam.inet6.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname (\"q.inet6.example\")", gethostbyname ("q.inet6.example"), "name: q.inet6.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname (\"qm.inet6.example\")", gethostbyname ("qm.inet6.example"), "name: qm.inet6.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname (\"amp.inet6.example\")", gethostbyname ("amp.inet6.example"), "error: NO_RECOVERY\n"); check_hostent ("gethostbyname (\"qmp.inet6.example\")", gethostbyname ("qmp.inet6.example"), "name: qmp.inet6.example\n" "address: 2001:db8::1\n"); check_hostent ("gethostbyname (\"ap.inet6.example\")", gethostbyname ("ap.inet6.example"), "error: NO_RECOVERY\n"); check_hostent ("gethostbyname (\"6ap.inet6.example\")", gethostbyname ("6ap.inet6.example"), "name: 6ap.inet6.example\n" "address: ::ffff:192.0.2.17\n"); check_hostent ("gethostbyname (\"am6p.inet6.example\")", gethostbyname ("am6p.inet6.example"), "name: am6p.inet6.example\n" "address: ::ffff:192.0.2.17\n"); check_hostent ("gethostbyname (\"qp.inet6.example\")", gethostbyname ("qp.inet6.example"), "name: qp.inet6.example\n" "address: 2001:db8::1\n"); test_get2_inet6 (); test_get2_inet6 (); test_gai (); test_get2_inet6 (); test_get2_inet6 (); TEST_VERIFY (_res.options & RES_USE_INET6); _res.options &= ~RES_USE_INET6; test_no_inet6 (); resolv_test_end (obj); return NULL; } static int do_test (void) { resolv_test_init (); /* Attempt to run on a non-main thread first. */ { pthread_t thr = xpthread_create (NULL, threadfunc, NULL); xpthread_join (thr); } /* Try the main thread next. */ threadfunc (NULL); return 0; } #include