diff options
Diffstat (limited to 'src/c-ares/test/ares-test-parse-mx.cc')
-rw-r--r-- | src/c-ares/test/ares-test-parse-mx.cc | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/c-ares/test/ares-test-parse-mx.cc b/src/c-ares/test/ares-test-parse-mx.cc new file mode 100644 index 00000000..37324a6d --- /dev/null +++ b/src/c-ares/test/ares-test-parse-mx.cc @@ -0,0 +1,141 @@ +#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 |