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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, ParseNsReplyOK) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NS))
.add_answer(new DNSNsRR("example.com", 100, "ns.example.com"));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_ns_reply(data.data(), data.size(), &host));
ASSERT_NE(nullptr, host);
std::stringstream ss;
ss << HostEnt(host);
EXPECT_EQ("{'example.com' aliases=[ns.example.com] addrs=[]}", ss.str());
ares_free_hostent(host);
}
TEST_F(LibraryTest, ParseNsReplyMultiple) {
DNSPacket pkt;
pkt.set_qid(10501).set_response().set_rd().set_ra()
.add_question(new DNSQuestion("google.com", T_NS))
.add_answer(new DNSNsRR("google.com", 59, "ns1.google.com"))
.add_answer(new DNSNsRR("google.com", 59, "ns2.google.com"))
.add_answer(new DNSNsRR("google.com", 59, "ns3.google.com"))
.add_answer(new DNSNsRR("google.com", 59, "ns4.google.com"))
.add_additional(new DNSARR("ns4.google.com", 247, {216,239,38,10}))
.add_additional(new DNSARR("ns2.google.com", 247, {216,239,34,10}))
.add_additional(new DNSARR("ns1.google.com", 247, {216,239,32,10}))
.add_additional(new DNSARR("ns3.google.com", 247, {216,239,36,10}));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_ns_reply(data.data(), data.size(), &host));
ASSERT_NE(nullptr, host);
std::stringstream ss;
ss << HostEnt(host);
EXPECT_EQ("{'google.com' aliases=[ns1.google.com, ns2.google.com, ns3.google.com, ns4.google.com] addrs=[]}", ss.str());
ares_free_hostent(host);
}
TEST_F(LibraryTest, ParseNsReplyErrors) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NS))
.add_answer(new DNSNsRR("example.com", 100, "ns.example.com"));
std::vector<byte> data;
struct hostent *host = nullptr;
// No question.
pkt.questions_.clear();
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), data.size(), &host));
pkt.add_question(new DNSQuestion("example.com", T_NS));
#ifdef DISABLED
// Question != answer
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("Axample.com", T_NS));
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_ns_reply(data.data(), data.size(), &host));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_NS));
#endif
// Two questions.
pkt.add_question(new DNSQuestion("example.com", T_NS));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), data.size(), &host));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_NS));
// 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_ns_reply(data.data(), data.size(), &host));
pkt.answers_.clear();
pkt.add_answer(new DNSNsRR("example.com", 100, "ns.example.com"));
// No answer.
pkt.answers_.clear();
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_ns_reply(data.data(), data.size(), &host));
pkt.add_answer(new DNSNsRR("example.com", 100, "ns.example.com"));
// Truncated packets.
data = pkt.data();
for (size_t len = 1; len < data.size(); len++) {
EXPECT_EQ(ARES_EBADRESP, ares_parse_ns_reply(data.data(), len, &host));
}
}
TEST_F(LibraryTest, ParseNsReplyAllocFail) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NS))
.add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
.add_answer(new DNSNsRR("c.example.com", 100, "ns.example.com"));
std::vector<byte> data = pkt.data();
struct hostent *host = nullptr;
for (int ii = 1; ii <= 8; ii++) {
ClearFails();
SetAllocFail(ii);
EXPECT_EQ(ARES_ENOMEM, ares_parse_ns_reply(data.data(), data.size(), &host)) << ii;
}
}
} // namespace test
} // namespace ares
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