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/*
* Copyright (C) The c-ares project
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* SPDX-License-Identifier: MIT
*/
#include "ares-test.h"
#include "dns-proto.h"
#include <sstream>
#include <vector>
namespace ares {
namespace test {
TEST_F(LibraryTest, ParseAaaaReplyOK) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSAaaaRR("example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}))
.add_answer(new DNSARR("example.com", 0x01020304, {2,3,4,5}));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
struct ares_addr6ttl info[5];
int count = 5;
EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(1, count);
EXPECT_EQ(100, info[0].ttl);
EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
ASSERT_NE(nullptr, host);
std::stringstream ss;
ss << HostEnt(host);
EXPECT_EQ("{'example.com' aliases=[] addrs=[0101:0101:0202:0202:0303:0303:0404:0404]}", ss.str());
ares_free_hostent(host);
// Repeat without providing places to put the results
count = 0;
EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
nullptr, info, &count));
}
TEST_F(LibraryTest, ParseAaaaReplyCname) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSCnameRR("example.com", 50, "c.example.com"))
.add_answer(new DNSAaaaRR("c.example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
struct ares_addr6ttl info[5];
int count = 5;
EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(1, count);
// CNAME TTL overrides AAAA TTL.
EXPECT_EQ(50, info[0].ttl);
EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
ASSERT_NE(nullptr, host);
std::stringstream ss;
ss << HostEnt(host);
EXPECT_EQ("{'c.example.com' aliases=[example.com] addrs=[0101:0101:0202:0202:0303:0303:0404:0404]}", ss.str());
ares_free_hostent(host);
// Repeat without providing a hostent
count = 5;
EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
nullptr, info, &count));
EXPECT_EQ(1, count);
EXPECT_EQ(50, info[0].ttl);
EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
}
TEST_F(LibraryTest, ParseAaaaReplyNoData) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
struct ares_addr6ttl info[2];
int count = 2;
EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(0, count);
EXPECT_EQ(nullptr, host);
// Again but with a CNAME.
pkt.add_answer(new DNSCnameRR("example.com", 200, "c.example.com"));
EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(0, count);
EXPECT_EQ(nullptr, host);
}
TEST_F(LibraryTest, ParseAaaaReplyErrors) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSAaaaRR("example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
std::vector<byte> data;
struct hostent *host = nullptr;
struct ares_addr6ttl info[2];
int count = 2;
// No question.
pkt.questions_.clear();
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(nullptr, host);
pkt.add_question(new DNSQuestion("example.com", T_AAAA));
// Question != answer
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("Axample.com", T_AAAA));
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(nullptr, host);
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_AAAA));
// Two questions.
pkt.add_question(new DNSQuestion("example.com", T_AAAA));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(nullptr, host);
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_AAAA));
// Wrong sort of answer.
pkt.answers_.clear();
pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(nullptr, host);
pkt.answers_.clear();
pkt.add_answer(new DNSAaaaRR("example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
// No answer.
pkt.answers_.clear();
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count));
EXPECT_EQ(nullptr, host);
pkt.add_answer(new DNSAaaaRR("example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
// Truncated packets.
data = pkt.data();
for (size_t len = 1; len < data.size(); len++) {
EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), len,
&host, info, &count));
EXPECT_EQ(nullptr, host);
EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), len,
nullptr, info, &count));
}
}
TEST_F(LibraryTest, ParseAaaaReplyAllocFail) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
.add_answer(new DNSAaaaRR("c.example.com", 100,
{0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
struct ares_addr6ttl info[2];
int count = 2;
for (int ii = 1; ii <= 8; ii++) {
ClearFails();
SetAllocFail(ii);
EXPECT_EQ(ARES_ENOMEM, ares_parse_aaaa_reply(data.data(), data.size(),
&host, info, &count)) << ii;
EXPECT_EQ(nullptr, host);
}
}
} // namespace test
} // namespace ares
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