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| 1 | +/* Exercise low-level query functions with different QTYPEs. |
| 2 | + Copyright (C) 2016 Free Software Foundation, Inc. |
| 3 | + This file is part of the GNU C Library. |
| 4 | +
|
| 5 | + The GNU C Library is free software; you can redistribute it and/or |
| 6 | + modify it under the terms of the GNU Lesser General Public |
| 7 | + License as published by the Free Software Foundation; either |
| 8 | + version 2.1 of the License, or (at your option) any later version. |
| 9 | +
|
| 10 | + The GNU C Library is distributed in the hope that it will be useful, |
| 11 | + but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | + Lesser General Public License for more details. |
| 14 | +
|
| 15 | + You should have received a copy of the GNU Lesser General Public |
| 16 | + License along with the GNU C Library; if not, see |
| 17 | + <http://www.gnu.org/licenses/>. */ |
| 18 | + |
| 19 | +#include <resolv.h> |
| 20 | +#include <string.h> |
| 21 | +#include <support/check.h> |
| 22 | +#include <support/check_nss.h> |
| 23 | +#include <support/resolv_test.h> |
| 24 | +#include <support/support.h> |
| 25 | +#include <support/test-driver.h> |
| 26 | +#include <support/xmemstream.h> |
| 27 | + |
| 28 | +/* If ture, the response function will send the actual response packet |
| 29 | + over TCP instead of UDP. */ |
| 30 | +static volatile bool force_tcp; |
| 31 | + |
| 32 | +/* Send back a fake resource record matching the QTYPE. */ |
| 33 | +static void |
| 34 | +response (const struct resolv_response_context *ctx, |
| 35 | + struct resolv_response_builder *b, |
| 36 | + const char *qname, uint16_t qclass, uint16_t qtype) |
| 37 | +{ |
| 38 | + if (force_tcp && ctx->tcp) |
| 39 | + { |
| 40 | + resolv_response_init (b, (struct resolv_response_flags) { .tc = 1 }); |
| 41 | + resolv_response_add_question (b, qname, qclass, qtype); |
| 42 | + return; |
| 43 | + } |
| 44 | + |
| 45 | + resolv_response_init (b, (struct resolv_response_flags) { }); |
| 46 | + resolv_response_add_question (b, qname, qclass, qtype); |
| 47 | + resolv_response_section (b, ns_s_an); |
| 48 | + resolv_response_open_record (b, qname, qclass, qtype, 0); |
| 49 | + resolv_response_add_data (b, &qtype, sizeof (qtype)); |
| 50 | + resolv_response_close_record (b); |
| 51 | +} |
| 52 | + |
| 53 | +static const const char *domain = "www.example.com"; |
| 54 | + |
| 55 | +static int |
| 56 | +wrap_res_query (int type, unsigned char *answer, int answer_length) |
| 57 | +{ |
| 58 | + return res_query (domain, C_IN, type, answer, answer_length); |
| 59 | +} |
| 60 | + |
| 61 | +static int |
| 62 | +wrap_res_search (int type, unsigned char *answer, int answer_length) |
| 63 | +{ |
| 64 | + return res_query (domain, C_IN, type, answer, answer_length); |
| 65 | +} |
| 66 | + |
| 67 | +static int |
| 68 | +wrap_res_querydomain (int type, unsigned char *answer, int answer_length) |
| 69 | +{ |
| 70 | + return res_querydomain ("www", "example.com", C_IN, type, |
| 71 | + answer, answer_length); |
| 72 | +} |
| 73 | + |
| 74 | +static int |
| 75 | +wrap_res_send (int type, unsigned char *answer, int answer_length) |
| 76 | +{ |
| 77 | + unsigned char buf[512]; |
| 78 | + int ret = res_mkquery (QUERY, domain, C_IN, type, |
| 79 | + (const unsigned char *) "", 0, NULL, |
| 80 | + buf, sizeof (buf)); |
| 81 | + if (type < 0 || type >= 65536) |
| 82 | + { |
| 83 | + /* res_mkquery fails for out-of-range record types. */ |
| 84 | + TEST_VERIFY_EXIT (ret == -1); |
| 85 | + return -1; |
| 86 | + } |
| 87 | + TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */ |
| 88 | + return res_send (buf, ret, answer, answer_length); |
| 89 | +} |
| 90 | + |
| 91 | +static int |
| 92 | +wrap_res_nquery (int type, unsigned char *answer, int answer_length) |
| 93 | +{ |
| 94 | + return res_nquery (&_res, domain, C_IN, type, answer, answer_length); |
| 95 | +} |
| 96 | + |
| 97 | +static int |
| 98 | +wrap_res_nsearch (int type, unsigned char *answer, int answer_length) |
| 99 | +{ |
| 100 | + return res_nquery (&_res, domain, C_IN, type, answer, answer_length); |
| 101 | +} |
| 102 | + |
| 103 | +static int |
| 104 | +wrap_res_nquerydomain (int type, unsigned char *answer, int answer_length) |
| 105 | +{ |
| 106 | + return res_nquerydomain (&_res, "www", "example.com", C_IN, type, |
| 107 | + answer, answer_length); |
| 108 | +} |
| 109 | + |
| 110 | +static int |
| 111 | +wrap_res_nsend (int type, unsigned char *answer, int answer_length) |
| 112 | +{ |
| 113 | + unsigned char buf[512]; |
| 114 | + int ret = res_nmkquery (&_res, QUERY, domain, C_IN, type, |
| 115 | + (const unsigned char *) "", 0, NULL, |
| 116 | + buf, sizeof (buf)); |
| 117 | + if (type < 0 || type >= 65536) |
| 118 | + { |
| 119 | + /* res_mkquery fails for out-of-range record types. */ |
| 120 | + TEST_VERIFY_EXIT (ret == -1); |
| 121 | + return -1; |
| 122 | + } |
| 123 | + TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */ |
| 124 | + return res_nsend (&_res, buf, ret, answer, answer_length); |
| 125 | +} |
| 126 | + |
| 127 | +static void |
| 128 | +test_function (const char *fname, |
| 129 | + int (*func) (int type, |
| 130 | + unsigned char *answer, int answer_length)) |
| 131 | +{ |
| 132 | + unsigned char buf[512]; |
| 133 | + for (int tcp = 0; tcp < 2; ++tcp) |
| 134 | + { |
| 135 | + force_tcp = tcp; |
| 136 | + for (unsigned int type = 1; type <= 65535; ++type) |
| 137 | + { |
| 138 | + if (test_verbose) |
| 139 | + printf ("info: sending QTYPE %d with %s (tcp=%d)\n", |
| 140 | + type, fname, tcp); |
| 141 | + int ret = func (type, buf, sizeof (buf)); |
| 142 | + if (ret != 47) |
| 143 | + FAIL_EXIT1 ("%s tcp=%d qtype=%d return value %d", |
| 144 | + fname,tcp, type, ret); |
| 145 | + /* One question, one answer record. */ |
| 146 | + TEST_VERIFY (memcmp (buf + 4, "\0\1\0\1\0\0\0\0", 8) == 0); |
| 147 | + /* Question section. */ |
| 148 | + static const char qname[] = "\3www\7example\3com"; |
| 149 | + size_t qname_length = sizeof (qname); |
| 150 | + TEST_VERIFY (memcmp (buf + 12, qname, qname_length) == 0); |
| 151 | + /* RDATA part of answer. */ |
| 152 | + uint16_t type16 = type; |
| 153 | + TEST_VERIFY (memcmp (buf + ret - 2, &type16, sizeof (type16)) == 0); |
| 154 | + } |
| 155 | + } |
| 156 | + |
| 157 | + TEST_VERIFY (func (-1, buf, sizeof (buf) == -1)); |
| 158 | + TEST_VERIFY (func (65536, buf, sizeof (buf) == -1)); |
| 159 | +} |
| 160 | + |
| 161 | +static int |
| 162 | +do_test (void) |
| 163 | +{ |
| 164 | + struct resolv_redirect_config config = |
| 165 | + { |
| 166 | + .response_callback = response, |
| 167 | + }; |
| 168 | + struct resolv_test *obj = resolv_test_start (config); |
| 169 | + |
| 170 | + test_function ("res_query", &wrap_res_query); |
| 171 | + test_function ("res_search", &wrap_res_search); |
| 172 | + test_function ("res_querydomain", &wrap_res_querydomain); |
| 173 | + test_function ("res_send", &wrap_res_send); |
| 174 | + |
| 175 | + test_function ("res_nquery", &wrap_res_nquery); |
| 176 | + test_function ("res_nsearch", &wrap_res_nsearch); |
| 177 | + test_function ("res_nquerydomain", &wrap_res_nquerydomain); |
| 178 | + test_function ("res_nsend", &wrap_res_nsend); |
| 179 | + |
| 180 | + resolv_test_end (obj); |
| 181 | + return 0; |
| 182 | +} |
| 183 | + |
| 184 | +#define TIMEOUT 300 |
| 185 | +#include <support/test-driver.c> |
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