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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, ParseNaptrReplyOK) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NAPTR))
.add_answer(new DNSNaptrRR("example.com", 100,
10, 20, "SP", "service", "regexp", "replace"))
.add_answer(new DNSNaptrRR("example.com", 0x0010,
11, 21, "SP", "service2", "regexp2", "replace2"));
std::vector<byte> data = pkt.data();
struct ares_naptr_reply* naptr = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
ASSERT_NE(nullptr, naptr);
EXPECT_EQ("SP", std::string((char*)naptr->flags));
EXPECT_EQ("service", std::string((char*)naptr->service));
EXPECT_EQ("regexp", std::string((char*)naptr->regexp));
EXPECT_EQ("replace", std::string((char*)naptr->replacement));
EXPECT_EQ(10, naptr->order);
EXPECT_EQ(20, naptr->preference);
struct ares_naptr_reply* naptr2 = naptr->next;
ASSERT_NE(nullptr, naptr2);
EXPECT_EQ("SP", std::string((char*)naptr2->flags));
EXPECT_EQ("service2", std::string((char*)naptr2->service));
EXPECT_EQ("regexp2", std::string((char*)naptr2->regexp));
EXPECT_EQ("replace2", std::string((char*)naptr2->replacement));
EXPECT_EQ(11, naptr2->order);
EXPECT_EQ(21, naptr2->preference);
EXPECT_EQ(nullptr, naptr2->next);
ares_free_data(naptr);
}
TEST_F(LibraryTest, ParseNaptrReplyErrors) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NAPTR))
.add_answer(new DNSNaptrRR("example.com", 100,
10, 20, "SP", "service", "regexp", "replace"));
std::vector<byte> data;
struct ares_naptr_reply* naptr = nullptr;
// No question.
pkt.questions_.clear();
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
pkt.add_question(new DNSQuestion("example.com", T_NAPTR));
#ifdef DISABLED
// Question != answer
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("Axample.com", T_NAPTR));
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_NAPTR));
#endif
// Two questions
pkt.add_question(new DNSQuestion("example.com", T_NAPTR));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_NAPTR));
// 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_SUCCESS, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
EXPECT_EQ(nullptr, naptr);
pkt.answers_.clear();
pkt.add_answer(new DNSNaptrRR("example.com", 100,
10, 20, "SP", "service", "regexp", "replace"));
// No answer.
pkt.answers_.clear();
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
pkt.add_answer(new DNSNaptrRR("example.com", 100,
10, 20, "SP", "service", "regexp", "replace"));
// Truncated packets.
data = pkt.data();
for (size_t len = 1; len < data.size(); len++) {
int rc = ares_parse_naptr_reply(data.data(), len, &naptr);
EXPECT_TRUE(rc == ARES_EBADRESP || rc == ARES_EBADNAME);
}
}
TEST_F(LibraryTest, ParseNaptrReplyTooShort) {
std::vector<byte> data = {
0x12, 0x34, // qid
0x84, // response + query + AA + not-TC + not-RD
0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
0x00, 0x01, // num questions
0x00, 0x01, // num answer RRs
0x00, 0x00, // num authority RRs
0x00, 0x00, // num additional RRs
// Question
0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x00, 0x23, // type NAPTR
0x00, 0x01, // class IN
// Answer 1
0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x00, 0x23, // RR type
0x00, 0x01, // class IN
0x01, 0x02, 0x03, 0x04, // TTL
0x00, 0x01, // rdata length
0x00, // Too short: expect 2 x int16 and 3 x name (min 1 byte each)
};
struct ares_naptr_reply* naptr = nullptr;
EXPECT_EQ(ARES_EBADRESP, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
}
TEST_F(LibraryTest, ParseNaptrReplyAllocFail) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_NAPTR))
.add_answer(new DNSNaptrRR("example.com", 100,
10, 20, "SP", "service", "regexp", "replace"))
.add_answer(new DNSNaptrRR("example.com", 0x0010,
11, 21, "SP", "service2", "regexp2", "replace2"));
std::vector<byte> data = pkt.data();
struct ares_naptr_reply* naptr = nullptr;
for (int ii = 1; ii <= 13; ii++) {
ClearFails();
SetAllocFail(ii);
EXPECT_EQ(ARES_ENOMEM, ares_parse_naptr_reply(data.data(), data.size(), &naptr));
}
}
} // namespace test
} // namespace ares
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