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#include "ares-test.h"
#include "dns-proto.h"
#include <sstream>
#include <vector>
namespace ares {
namespace test {
TEST_F(LibraryTest, ParseMxReplyOK) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", ns_t_mx))
.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"))
.add_answer(new DNSMxRR("example.com", 100, 200, "mx2.example.com"));
std::vector<byte> data = pkt.data();
struct ares_mx_reply* mx = nullptr;
EXPECT_EQ(ARES_SUCCESS, ares_parse_mx_reply(data.data(), data.size(), &mx));
ASSERT_NE(nullptr, mx);
EXPECT_EQ("mx1.example.com", std::string(mx->host));
EXPECT_EQ(100, mx->priority);
struct ares_mx_reply* mx2 = mx->next;
ASSERT_NE(nullptr, mx2);
EXPECT_EQ("mx2.example.com", std::string(mx2->host));
EXPECT_EQ(200, mx2->priority);
EXPECT_EQ(nullptr, mx2->next);
ares_free_data(mx);
}
TEST_F(LibraryTest, ParseMxReplyMalformed) {
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, 0x0F, // type MX
0x00, 0x01, // class IN
// Answer 1
0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x00, 0x0F, // RR type
0x00, 0x01, // class IN
0x01, 0x02, 0x03, 0x04, // TTL
0x00, 0x01, // rdata length -- too short
0x02,
};
struct ares_mx_reply* mx = nullptr;
EXPECT_EQ(ARES_EBADRESP, ares_parse_mx_reply(data.data(), data.size(), &mx));
ASSERT_EQ(nullptr, mx);
}
TEST_F(LibraryTest, ParseMxReplyErrors) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", ns_t_mx))
.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
std::vector<byte> data;
struct ares_mx_reply* mx = nullptr;
// No question.
pkt.questions_.clear();
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_mx_reply(data.data(), data.size(), &mx));
EXPECT_EQ(nullptr, mx);
pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
#ifdef DISABLED
// Question != answer
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("Axample.com", ns_t_mx));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_mx_reply(data.data(), data.size(), &mx));
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
#endif
// Two questions.
pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
data = pkt.data();
EXPECT_EQ(ARES_EBADRESP, ares_parse_mx_reply(data.data(), data.size(), &mx));
EXPECT_EQ(nullptr, mx);
pkt.questions_.clear();
pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
// Wrong sort of answer.
// TODO(drysdale): check if this should be ARES_ENODATA?
pkt.answers_.clear();
pkt.add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"));
data = pkt.data();
EXPECT_EQ(ARES_SUCCESS, ares_parse_mx_reply(data.data(), data.size(), &mx));
EXPECT_EQ(nullptr, mx);
pkt.answers_.clear();
pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
// No answer.
pkt.answers_.clear();
data = pkt.data();
EXPECT_EQ(ARES_ENODATA, ares_parse_mx_reply(data.data(), data.size(), &mx));
EXPECT_EQ(nullptr, mx);
pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
// Truncated packets.
data = pkt.data();
for (size_t len = 1; len < data.size(); len++) {
int rc = ares_parse_mx_reply(data.data(), len, &mx);
EXPECT_EQ(nullptr, mx);
EXPECT_TRUE(rc == ARES_EBADRESP || rc == ARES_EBADNAME);
}
}
TEST_F(LibraryTest, ParseMxReplyAllocFail) {
DNSPacket pkt;
pkt.set_qid(0x1234).set_response().set_aa()
.add_question(new DNSQuestion("example.com", ns_t_mx))
.add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
.add_answer(new DNSMxRR("c.example.com", 100, 100, "mx1.example.com"));
std::vector<byte> data = pkt.data();
struct ares_mx_reply* mx = nullptr;
for (int ii = 1; ii <= 5; ii++) {
ClearFails();
SetAllocFail(ii);
EXPECT_EQ(ARES_ENOMEM, ares_parse_mx_reply(data.data(), data.size(), &mx)) << ii;
}
}
} // namespace test
} // namespace ares
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