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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, ParseUriReplyOK) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_URI))
.add_answer(new DNSUriRR("example.com", 100, 10, 20, "uri.example.com"))
.add_answer(new DNSUriRR("example.com", 200, 11, 21, "uri2.example.com"));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_uri_reply(data.data(), data.size(), &uri));
ASSERT_NE(nullptr, uri);
EXPECT_EQ("uri.example.com", std::string(uri->uri));
EXPECT_EQ(10, uri->priority);
EXPECT_EQ(20, uri->weight);
EXPECT_EQ(100, uri->ttl);
struct ares_uri_reply* uri2 = uri->next;
ASSERT_NE(nullptr, uri2);
EXPECT_EQ("uri2.example.com", std::string(uri2->uri));
EXPECT_EQ(11, uri2->priority);
EXPECT_EQ(21, uri2->weight);
EXPECT_EQ(200, uri2->ttl);
EXPECT_EQ(nullptr, uri2->next);
ares_free_data(uri);
}
TEST_F(LibraryTest, ParseUriReplySingle) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.abc.def.com", T_URI))
.add_answer(new DNSUriRR("example.abc.def.com", 180, 0, 10, "example.abc.def.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else1.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else2.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else3.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else4.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else5.where.com"))
.add_additional(new DNSARR("else2.where.com", 42, {172,19,0,1}))
.add_additional(new DNSARR("else5.where.com", 42, {172,19,0,2}));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_uri_reply(data.data(), data.size(), &uri));
ASSERT_NE(nullptr, uri);
EXPECT_EQ("example.abc.def.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(10, uri->weight);
EXPECT_EQ(180, uri->ttl);
EXPECT_EQ(nullptr, uri->next);
ares_free_data(uri);
}
TEST_F(LibraryTest, ParseUriReplyMalformed) {
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,
0x01, 0x00, // type URI
0x00, 0x01, // class IN
// Answer 1
0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x01, 0x00, // RR type
0x00, 0x01, // class IN
0x01, 0x02, 0x03, 0x04, // TTL
0x00, 0x04, // rdata length -- too short
0x02, 0x03, 0x04, 0x05,
};
struct ares_uri_reply* uri = nullptr;
EXPECT_EQ(ARES_EBADRESP, ares_parse_uri_reply(data.data(), data.size(), &uri));
ASSERT_EQ(nullptr, uri);
}
TEST_F(LibraryTest, ParseUriReplyMultiple) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_ra().set_rd()
.add_question(new DNSQuestion("uri.example.com", T_URI))
.add_answer(new DNSUriRR("uri.example.com", 600, 0, 5, "a1.uri.example.com"))
.add_answer(new DNSUriRR("uri.example.com", 660, 0, 5, "a2.uri.example.com"))
.add_answer(new DNSUriRR("uri.example.com", 720, 0, 5, "a3.uri.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns1.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns2.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns3.example.com"))
.add_additional(new DNSARR("a1.uri.example.com", 300, {172,19,1,1}))
.add_additional(new DNSARR("a2.uri.example.com", 300, {172,19,1,2}))
.add_additional(new DNSARR("a3.uri.example.com", 300, {172,19,1,3}))
.add_additional(new DNSARR("n1.example.com", 300, {172,19,0,1}))
.add_additional(new DNSARR("n2.example.com", 300, {172,19,0,2}))
.add_additional(new DNSARR("n3.example.com", 300, {172,19,0,3}));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri0 = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_uri_reply(data.data(), data.size(), &uri0));
ASSERT_NE(nullptr, uri0);
struct ares_uri_reply* uri = uri0;
EXPECT_EQ("a1.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(600, uri->ttl);
EXPECT_NE(nullptr, uri->next);
uri = uri->next;
EXPECT_EQ("a2.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(660, uri->ttl);
EXPECT_NE(nullptr, uri->next);
uri = uri->next;
EXPECT_EQ("a3.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(720, uri->ttl);
EXPECT_EQ(nullptr, uri->next);
ares_free_data(uri0);
}
TEST_F(LibraryTest, ParseUriReplyCname) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.abc.def.com", T_URI))
.add_answer(new DNSCnameRR("example.abc.def.com", 300, "cname.abc.def.com"))
.add_answer(new DNSUriRR("cname.abc.def.com", 600, 0, 10, "uri.abc.def.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else1.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else2.where.com"))
.add_auth(new DNSNsRR("abc.def.com", 44, "else3.where.com"))
.add_additional(new DNSARR("example.abc.def.com", 300, {172,19,0,1}))
.add_additional(new DNSARR("else1.where.com", 42, {172,19,0,1}))
.add_additional(new DNSARR("else2.where.com", 42, {172,19,0,2}))
.add_additional(new DNSARR("else3.where.com", 42, {172,19,0,3}));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_uri_reply(data.data(), data.size(), &uri));
ASSERT_NE(nullptr, uri);
EXPECT_EQ("uri.abc.def.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(10, uri->weight);
EXPECT_EQ(600, uri->ttl);
EXPECT_EQ(nullptr, uri->next);
ares_free_data(uri);
}
TEST_F(LibraryTest, ParseUriReplyCnameMultiple) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_ra().set_rd()
.add_question(new DNSQuestion("query.example.com", T_URI))
.add_answer(new DNSCnameRR("query.example.com", 300, "uri.example.com"))
.add_answer(new DNSUriRR("uri.example.com", 600, 0, 5, "a1.uri.example.com"))
.add_answer(new DNSUriRR("uri.example.com", 660, 0, 5, "a2.uri.example.com"))
.add_answer(new DNSUriRR("uri.example.com", 720, 0, 5, "a3.uri.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns1.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns2.example.com"))
.add_auth(new DNSNsRR("example.com", 300, "ns3.example.com"))
.add_additional(new DNSARR("a1.uri.example.com", 300, {172,19,1,1}))
.add_additional(new DNSARR("a2.uri.example.com", 300, {172,19,1,2}))
.add_additional(new DNSARR("a3.uri.example.com", 300, {172,19,1,3}))
.add_additional(new DNSARR("n1.example.com", 300, {172,19,0,1}))
.add_additional(new DNSARR("n2.example.com", 300, {172,19,0,2}))
.add_additional(new DNSARR("n3.example.com", 300, {172,19,0,3}));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri0 = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_uri_reply(data.data(), data.size(), &uri0));
ASSERT_NE(nullptr, uri0);
struct ares_uri_reply* uri = uri0;
EXPECT_EQ("a1.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(600, uri->ttl);
EXPECT_NE(nullptr, uri->next);
uri = uri->next;
EXPECT_EQ("a2.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(660, uri->ttl);
EXPECT_NE(nullptr, uri->next);
uri = uri->next;
EXPECT_EQ("a3.uri.example.com", std::string(uri->uri));
EXPECT_EQ(0, uri->priority);
EXPECT_EQ(5, uri->weight);
EXPECT_EQ(720, uri->ttl);
EXPECT_EQ(nullptr, uri->next);
ares_free_data(uri0);
}
TEST_F(LibraryTest, ParseUriReplyErrors) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.abc.def.com", T_URI))
.add_answer(new DNSUriRR("example.abc.def.com", 180, 0, 10, "example.abc.def.com"));
std::vector<byte> data;
struct ares_uri_reply* uri = nullptr;
// No question.
pkt.questions_.clear();
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_uri_reply(data.data(), data.size(), &uri));
pkt.add_question(new DNSQuestion("example.abc.def.com", T_URI));
#ifdef DISABLED
// Question != answer
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("Axample.com", T_URI));
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_uri_reply(data.data(), data.size(), &uri));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", T_URI));
#endif
// Two questions.
pkt.add_question(new DNSQuestion("example.abc.def.com", T_URI));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_uri_reply(data.data(), data.size(), &uri));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", T_PTR));
// 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_uri_reply(data.data(), data.size(), &uri));
EXPECT_EQ(nullptr, uri);
pkt.answers_.clear();
pkt.add_answer(new DNSUriRR("example.abc.def.com", 180, 0, 10, "example.abc.def.com"));
// No answer.
pkt.answers_.clear();
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_uri_reply(data.data(), data.size(), &uri));
pkt.add_answer(new DNSUriRR("example.abc.def.com", 180, 0, 10, "example.abc.def.com"));
// Truncated packets.
data = pkt.data();
for (size_t len = 1; len < data.size(); len++) {
int rc = ares_parse_uri_reply(data.data(), len, &uri);
EXPECT_TRUE(rc == ARES_EBADRESP || rc == ARES_EBADNAME);
}
}
TEST_F(LibraryTest, ParseUriReplyAllocFail) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.abc.def.com", T_URI))
.add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
.add_answer(new DNSUriRR("example.abc.def.com", 180, 0, 10, "example.abc.def.com"));
std::vector<byte> data = pkt.data();
struct ares_uri_reply* uri = nullptr;
for (int ii = 1; ii <= 5; ii++) {
ClearFails();
SetAllocFail(ii);
EXPECT_EQ(ARES_ENOMEM, ares_parse_uri_reply(data.data(), data.size(), &uri)) << ii;
}
}
} // namespace test
} // namespace ares
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