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204 lines
6.2 KiB
204 lines
6.2 KiB
/* |
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* Copyright (C) The c-ares project |
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* |
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* Permission to use, copy, modify, and distribute this |
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* software and its documentation for any purpose and without |
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* fee is hereby granted, provided that the above copyright |
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* notice appear in all copies and that both that copyright |
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* notice and this permission notice appear in supporting |
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* documentation, and that the name of M.I.T. not be used in |
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* advertising or publicity pertaining to distribution of the |
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* software without specific, written prior permission. |
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* M.I.T. makes no representations about the suitability of |
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* this software for any purpose. It is provided "as is" |
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* without express or implied warranty. |
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* |
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* SPDX-License-Identifier: MIT |
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*/ |
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#include "ares-test.h" |
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#include "dns-proto.h" |
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#include <sstream> |
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#include <vector> |
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namespace ares { |
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namespace test { |
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TEST_F(LibraryTest, ParseRootName) { |
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DNSPacket pkt; |
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pkt.set_qid(0x1234).set_response().set_aa() |
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.add_question(new DNSQuestion(".", T_A)) |
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.add_answer(new DNSARR(".", 100, {0x02, 0x03, 0x04, 0x05})); |
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std::vector<byte> data = pkt.data(); |
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struct hostent *host = nullptr; |
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struct ares_addrttl info[2]; |
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int count = 2; |
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EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), (int)data.size(), |
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&host, info, &count)); |
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EXPECT_EQ(1, count); |
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std::stringstream ss; |
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ss << HostEnt(host); |
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EXPECT_EQ("{'' aliases=[] addrs=[2.3.4.5]}", ss.str()); |
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ares_free_hostent(host); |
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} |
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TEST_F(LibraryTest, ParseIndirectRootName) { |
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std::vector<byte> data = { |
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0x12, 0x34, // qid |
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0x84, // response + query + AA + not-TC + not-RD |
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError |
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0x00, 0x01, // num questions |
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0x00, 0x01, // num answer RRs |
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0x00, 0x00, // num authority RRs |
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0x00, 0x00, // num additional RRs |
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// Question |
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0xC0, 0x04, // weird: pointer to a random zero earlier in the message |
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0x00, 0x01, // type A |
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0x00, 0x01, // class IN |
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// Answer 1 |
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0xC0, 0x04, |
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0x00, 0x01, // RR type |
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0x00, 0x01, // class IN |
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0x01, 0x02, 0x03, 0x04, // TTL |
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0x00, 0x04, // rdata length |
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0x02, 0x03, 0x04, 0x05, |
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}; |
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struct hostent *host = nullptr; |
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struct ares_addrttl info[2]; |
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int count = 2; |
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EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), (int)data.size(), |
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&host, info, &count)); |
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EXPECT_EQ(1, count); |
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std::stringstream ss; |
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ss << HostEnt(host); |
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EXPECT_EQ("{'' aliases=[] addrs=[2.3.4.5]}", ss.str()); |
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ares_free_hostent(host); |
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} |
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#if 0 /* We are validating hostnames now, its not clear how this would ever be valid */ |
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TEST_F(LibraryTest, ParseEscapedName) { |
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std::vector<byte> data = { |
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0x12, 0x34, // qid |
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0x84, // response + query + AA + not-TC + not-RD |
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError |
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0x00, 0x01, // num questions |
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0x00, 0x01, // num answer RRs |
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0x00, 0x00, // num authority RRs |
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0x00, 0x00, // num additional RRs |
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// Question |
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0x05, 'a', '\\', 'b', '.', 'c', |
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0x03, 'c', 'o', 'm', |
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0x00, |
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0x00, 0x01, // type A |
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0x00, 0x01, // class IN |
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// Answer 1 |
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0x05, 'a', '\\', 'b', '.', 'c', |
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0x03, 'c', 'o', 'm', |
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0x00, |
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0x00, 0x01, // RR type |
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0x00, 0x01, // class IN |
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0x01, 0x02, 0x03, 0x04, // TTL |
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0x00, 0x04, // rdata length |
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0x02, 0x03, 0x04, 0x05, |
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}; |
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struct hostent *host = nullptr; |
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struct ares_addrttl info[2]; |
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int count = 2; |
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EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(), |
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&host, info, &count)); |
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EXPECT_EQ(1, count); |
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HostEnt hent(host); |
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std::stringstream ss; |
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ss << hent; |
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// The printable name is expanded with escapes. |
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EXPECT_EQ(11, hent.name_.size()); |
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EXPECT_EQ('a', hent.name_[0]); |
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EXPECT_EQ('\\', hent.name_[1]); |
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EXPECT_EQ('\\', hent.name_[2]); |
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EXPECT_EQ('b', hent.name_[3]); |
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EXPECT_EQ('\\', hent.name_[4]); |
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EXPECT_EQ('.', hent.name_[5]); |
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EXPECT_EQ('c', hent.name_[6]); |
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ares_free_hostent(host); |
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} |
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#endif |
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TEST_F(LibraryTest, ParsePartialCompressedName) { |
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std::vector<byte> data = { |
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0x12, 0x34, // qid |
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0x84, // response + query + AA + not-TC + not-RD |
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError |
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0x00, 0x01, // num questions |
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0x00, 0x01, // num answer RRs |
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0x00, 0x00, // num authority RRs |
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0x00, 0x00, // num additional RRs |
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// Question |
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0x03, 'w', 'w', 'w', |
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e', |
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0x03, 'c', 'o', 'm', |
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0x00, |
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0x00, 0x01, // type A |
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0x00, 0x01, // class IN |
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// Answer 1 |
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0x03, 'w', 'w', 'w', |
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0xc0, 0x10, // offset 16 |
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0x00, 0x01, // RR type |
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0x00, 0x01, // class IN |
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0x01, 0x02, 0x03, 0x04, // TTL |
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0x00, 0x04, // rdata length |
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0x02, 0x03, 0x04, 0x05, |
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}; |
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struct hostent *host = nullptr; |
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struct ares_addrttl info[2]; |
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int count = 2; |
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EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), (int)data.size(), |
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&host, info, &count)); |
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ASSERT_NE(nullptr, host); |
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std::stringstream ss; |
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ss << HostEnt(host); |
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EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str()); |
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ares_free_hostent(host); |
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} |
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TEST_F(LibraryTest, ParseFullyCompressedName) { |
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std::vector<byte> data = { |
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0x12, 0x34, // qid |
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0x84, // response + query + AA + not-TC + not-RD |
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError |
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0x00, 0x01, // num questions |
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0x00, 0x01, // num answer RRs |
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0x00, 0x00, // num authority RRs |
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0x00, 0x00, // num additional RRs |
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// Question |
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0x03, 'w', 'w', 'w', |
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e', |
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0x03, 'c', 'o', 'm', |
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0x00, |
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0x00, 0x01, // type A |
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0x00, 0x01, // class IN |
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// Answer 1 |
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0xc0, 0x0c, // offset 12 |
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0x00, 0x01, // RR type |
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0x00, 0x01, // class IN |
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0x01, 0x02, 0x03, 0x04, // TTL |
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0x00, 0x04, // rdata length |
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0x02, 0x03, 0x04, 0x05, |
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}; |
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struct hostent *host = nullptr; |
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struct ares_addrttl info[2]; |
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int count = 2; |
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EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), (int)data.size(), |
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&host, info, &count)); |
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ASSERT_NE(nullptr, host); |
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std::stringstream ss; |
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ss << HostEnt(host); |
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EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str()); |
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ares_free_hostent(host); |
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} |
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} // namespace test |
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} // namespace ares
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