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-rw-r--r--src/c-ares/test/ares-test-parse-txt.cc266
1 files changed, 266 insertions, 0 deletions
diff --git a/src/c-ares/test/ares-test-parse-txt.cc b/src/c-ares/test/ares-test-parse-txt.cc
new file mode 100644
index 000000000..8aaaaa3b4
--- /dev/null
+++ b/src/c-ares/test/ares-test-parse-txt.cc
@@ -0,0 +1,266 @@
+#include "ares-test.h"
+#include "dns-proto.h"
+
+#include <sstream>
+#include <vector>
+
+namespace ares {
+namespace test {
+
+TEST_F(LibraryTest, ParseTxtReplyOK) {
+ DNSPacket pkt;
+ std::string expected1 = "txt1.example.com";
+ std::string expected2a = "txt2a";
+ std::string expected2b("ABC\0ABC", 7);
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("example.com", ns_t_mx))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
+ std::vector<byte> data = pkt.data();
+
+ struct ares_txt_reply* txt = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ ASSERT_NE(nullptr, txt);
+ EXPECT_EQ(std::vector<byte>(expected1.data(), expected1.data() + expected1.size()),
+ std::vector<byte>(txt->txt, txt->txt + txt->length));
+
+ struct ares_txt_reply* txt2 = txt->next;
+ ASSERT_NE(nullptr, txt2);
+ EXPECT_EQ(std::vector<byte>(expected2a.data(), expected2a.data() + expected2a.size()),
+ std::vector<byte>(txt2->txt, txt2->txt + txt2->length));
+
+ struct ares_txt_reply* txt3 = txt2->next;
+ ASSERT_NE(nullptr, txt3);
+ EXPECT_EQ(std::vector<byte>(expected2b.data(), expected2b.data() + expected2b.size()),
+ std::vector<byte>(txt3->txt, txt3->txt + txt3->length));
+ EXPECT_EQ(nullptr, txt3->next);
+
+ ares_free_data(txt);
+}
+
+TEST_F(LibraryTest, ParseTxtExtReplyOK) {
+ DNSPacket pkt;
+ std::string expected1 = "txt1.example.com";
+ std::string expected2a = "txt2a";
+ std::string expected2b("ABC\0ABC", 7);
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("example.com", ns_t_mx))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
+ std::vector<byte> data = pkt.data();
+
+ struct ares_txt_ext* txt = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_txt_reply_ext(data.data(), data.size(), &txt));
+ ASSERT_NE(nullptr, txt);
+ EXPECT_EQ(std::vector<byte>(expected1.data(), expected1.data() + expected1.size()),
+ std::vector<byte>(txt->txt, txt->txt + txt->length));
+ EXPECT_EQ(1, txt->record_start);
+
+ struct ares_txt_ext* txt2 = txt->next;
+ ASSERT_NE(nullptr, txt2);
+ EXPECT_EQ(std::vector<byte>(expected2a.data(), expected2a.data() + expected2a.size()),
+ std::vector<byte>(txt2->txt, txt2->txt + txt2->length));
+ EXPECT_EQ(1, txt2->record_start);
+
+ struct ares_txt_ext* txt3 = txt2->next;
+ ASSERT_NE(nullptr, txt3);
+ EXPECT_EQ(std::vector<byte>(expected2b.data(), expected2b.data() + expected2b.size()),
+ std::vector<byte>(txt3->txt, txt3->txt + txt3->length));
+ EXPECT_EQ(nullptr, txt3->next);
+ EXPECT_EQ(0, txt3->record_start);
+
+ ares_free_data(txt);
+}
+
+TEST_F(LibraryTest, ParseTxtMalformedReply1) {
+ 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, 0x10, // type TXT
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x10, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x03, // rdata length
+ 0x12, 'a', 'b', // invalid length
+ };
+
+ struct ares_txt_reply* txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ ASSERT_EQ(nullptr, txt);
+}
+
+TEST_F(LibraryTest, ParseTxtMalformedReply2) {
+ 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, 0x10, // type TXT
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x10, // RR type
+ // truncated
+ };
+
+ struct ares_txt_reply* txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ ASSERT_EQ(nullptr, txt);
+}
+
+TEST_F(LibraryTest, ParseTxtMalformedReply3) {
+ 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, 0x10, // type TXT
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x10, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x13, // rdata length INVALID
+ 0x02, 'a', 'b',
+ };
+
+ struct ares_txt_reply* txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ ASSERT_EQ(nullptr, txt);
+}
+
+TEST_F(LibraryTest, ParseTxtMalformedReply4) {
+ 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, 0x10, // type TXT
+ 0x00, // TRUNCATED
+ };
+
+ struct ares_txt_reply* txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ ASSERT_EQ(nullptr, txt);
+}
+
+TEST_F(LibraryTest, ParseTxtReplyErrors) {
+ DNSPacket pkt;
+ std::string expected1 = "txt1.example.com";
+ std::string expected2a = "txt2a";
+ std::string expected2b = "txt2b";
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("example.com", ns_t_mx))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
+ std::vector<byte> data = pkt.data();
+ struct ares_txt_reply* txt = nullptr;
+
+ // No question.
+ pkt.questions_.clear();
+ data = pkt.data();
+ txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ EXPECT_EQ(nullptr, txt);
+ 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_txt));
+ data = pkt.data();
+ EXPECT_EQ(ARES_ENODATA, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ pkt.questions_.clear();
+ pkt.add_question(new DNSQuestion("example.com", ns_t_txt));
+#endif
+
+ // Two questions.
+ pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
+ data = pkt.data();
+ txt = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ EXPECT_EQ(nullptr, txt);
+ pkt.questions_.clear();
+ pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
+
+ // No answer.
+ pkt.answers_.clear();
+ data = pkt.data();
+ txt = nullptr;
+ EXPECT_EQ(ARES_ENODATA, ares_parse_txt_reply(data.data(), data.size(), &txt));
+ EXPECT_EQ(nullptr, txt);
+ pkt.add_answer(new DNSTxtRR("example.com", 100, {expected1}));
+
+ // Truncated packets.
+ for (size_t len = 1; len < data.size(); len++) {
+ txt = nullptr;
+ EXPECT_NE(ARES_SUCCESS, ares_parse_txt_reply(data.data(), len, &txt));
+ EXPECT_EQ(nullptr, txt);
+ }
+}
+
+TEST_F(LibraryTest, ParseTxtReplyAllocFail) {
+ DNSPacket pkt;
+ std::string expected1 = "txt1.example.com";
+ std::string expected2a = "txt2a";
+ std::string expected2b = "txt2b";
+ 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 DNSTxtRR("c.example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("c.example.com", 100, {expected1}))
+ .add_answer(new DNSTxtRR("c.example.com", 100, {expected2a, expected2b}));
+ std::vector<byte> data = pkt.data();
+ struct ares_txt_reply* txt = nullptr;
+
+ for (int ii = 1; ii <= 13; ii++) {
+ ClearFails();
+ SetAllocFail(ii);
+ EXPECT_EQ(ARES_ENOMEM, ares_parse_txt_reply(data.data(), data.size(), &txt)) << ii;
+ }
+}
+
+
+} // namespace test
+} // namespace ares
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