ares-test-parse-ns.cc (5530B)
1 /* MIT License 2 * 3 * Copyright (c) The c-ares project and its contributors 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy 6 * of this software and associated documentation files (the "Software"), to deal 7 * in the Software without restriction, including without limitation the rights 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 * copies of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 * SPDX-License-Identifier: MIT 25 */ 26 #include "ares-test.h" 27 #include "dns-proto.h" 28 29 #include <sstream> 30 #include <vector> 31 32 namespace ares { 33 namespace test { 34 35 TEST_F(LibraryTest, ParseNsReplyOK) { 36 DNSPacket pkt; 37 pkt.set_qid(0x1234).set_response().set_aa() 38 .add_question(new DNSQuestion("example.com", T_NS)) 39 .add_answer(new DNSNsRR("example.com", 100, "ns.example.com")); 40 std::vector<byte> data = pkt.data(); 41 42 struct hostent *host = nullptr; 43 EXPECT_EQ(ARES_SUCCESS, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 44 ASSERT_NE(nullptr, host); 45 std::stringstream ss; 46 ss << HostEnt(host); 47 EXPECT_EQ("{'example.com' aliases=[ns.example.com] addrs=[]}", ss.str()); 48 ares_free_hostent(host); 49 } 50 51 TEST_F(LibraryTest, ParseNsReplyMultiple) { 52 DNSPacket pkt; 53 pkt.set_qid(10501).set_response().set_rd().set_ra() 54 .add_question(new DNSQuestion("google.com", T_NS)) 55 .add_answer(new DNSNsRR("google.com", 59, "ns1.google.com")) 56 .add_answer(new DNSNsRR("google.com", 59, "ns2.google.com")) 57 .add_answer(new DNSNsRR("google.com", 59, "ns3.google.com")) 58 .add_answer(new DNSNsRR("google.com", 59, "ns4.google.com")) 59 .add_additional(new DNSARR("ns4.google.com", 247, {216,239,38,10})) 60 .add_additional(new DNSARR("ns2.google.com", 247, {216,239,34,10})) 61 .add_additional(new DNSARR("ns1.google.com", 247, {216,239,32,10})) 62 .add_additional(new DNSARR("ns3.google.com", 247, {216,239,36,10})); 63 std::vector<byte> data = pkt.data(); 64 65 struct hostent *host = nullptr; 66 EXPECT_EQ(ARES_SUCCESS, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 67 ASSERT_NE(nullptr, host); 68 std::stringstream ss; 69 ss << HostEnt(host); 70 EXPECT_EQ("{'google.com' aliases=[ns1.google.com, ns2.google.com, ns3.google.com, ns4.google.com] addrs=[]}", ss.str()); 71 ares_free_hostent(host); 72 } 73 74 TEST_F(LibraryTest, ParseNsReplyErrors) { 75 DNSPacket pkt; 76 pkt.set_qid(0x1234).set_response().set_aa() 77 .add_question(new DNSQuestion("example.com", T_NS)) 78 .add_answer(new DNSNsRR("example.com", 100, "ns.example.com")); 79 std::vector<byte> data; 80 struct hostent *host = nullptr; 81 82 // No question. 83 pkt.questions_.clear(); 84 data = pkt.data(); 85 EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 86 pkt.add_question(new DNSQuestion("example.com", T_NS)); 87 88 #ifdef DISABLED 89 // Question != answer 90 pkt.questions_.clear(); 91 pkt.add_question(new DNSQuestion("Axample.com", T_NS)); 92 data = pkt.data(); 93 EXPECT_EQ(ARES_ENODATA, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 94 pkt.questions_.clear(); 95 pkt.add_question(new DNSQuestion("example.com", T_NS)); 96 #endif 97 98 // Two questions. 99 pkt.add_question(new DNSQuestion("example.com", T_NS)); 100 data = pkt.data(); 101 EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 102 pkt.questions_.clear(); 103 pkt.add_question(new DNSQuestion("example.com", T_NS)); 104 105 // Wrong sort of answer. 106 pkt.answers_.clear(); 107 pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com")); 108 data = pkt.data(); 109 EXPECT_EQ(ARES_ENODATA, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 110 pkt.answers_.clear(); 111 pkt.add_answer(new DNSNsRR("example.com", 100, "ns.example.com")); 112 113 // No answer. 114 pkt.answers_.clear(); 115 data = pkt.data(); 116 EXPECT_EQ(ARES_ENODATA, ares_parse_ns_reply(data.data(), (int)data.size(), &host)); 117 pkt.add_answer(new DNSNsRR("example.com", 100, "ns.example.com")); 118 119 // Truncated packets. 120 data = pkt.data(); 121 for (size_t len = 1; len < data.size(); len++) { 122 EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), (int)len, &host)); 123 } 124 125 // Negative Length 126 EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), -1, &host)); 127 } 128 129 TEST_F(LibraryTest, ParseNsReplyAllocFail) { 130 DNSPacket pkt; 131 pkt.set_qid(0x1234).set_response().set_aa() 132 .add_question(new DNSQuestion("example.com", T_NS)) 133 .add_answer(new DNSCnameRR("example.com", 300, "c.example.com")) 134 .add_answer(new DNSNsRR("c.example.com", 100, "ns.example.com")); 135 std::vector<byte> data = pkt.data(); 136 struct hostent *host = nullptr; 137 138 for (int ii = 1; ii <= 8; ii++) { 139 ClearFails(); 140 SetAllocFail(ii); 141 EXPECT_EQ(ARES_ENOMEM, ares_parse_ns_reply(data.data(), (int)data.size(), &host)) << ii; 142 } 143 } 144 145 146 } // namespace test 147 } // namespace ares