267 lines
8.7 KiB
C++
267 lines
8.7 KiB
C++
#include "ares-test.h"
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#include "dns-proto.h"
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#include <sstream>
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#include <vector>
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namespace ares {
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namespace test {
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TEST_F(LibraryTest, ParseTxtReplyOK) {
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DNSPacket pkt;
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std::string expected1 = "txt1.example.com";
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std::string expected2a = "txt2a";
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std::string expected2b("ABC\0ABC", 7);
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("example.com", ns_t_mx))
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.add_answer(new DNSTxtRR("example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
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std::vector<byte> data = pkt.data();
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struct ares_txt_reply* txt = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_txt_reply(data.data(), data.size(), &txt));
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ASSERT_NE(nullptr, txt);
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EXPECT_EQ(std::vector<byte>(expected1.data(), expected1.data() + expected1.size()),
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std::vector<byte>(txt->txt, txt->txt + txt->length));
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struct ares_txt_reply* txt2 = txt->next;
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ASSERT_NE(nullptr, txt2);
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EXPECT_EQ(std::vector<byte>(expected2a.data(), expected2a.data() + expected2a.size()),
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std::vector<byte>(txt2->txt, txt2->txt + txt2->length));
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struct ares_txt_reply* txt3 = txt2->next;
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ASSERT_NE(nullptr, txt3);
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EXPECT_EQ(std::vector<byte>(expected2b.data(), expected2b.data() + expected2b.size()),
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std::vector<byte>(txt3->txt, txt3->txt + txt3->length));
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EXPECT_EQ(nullptr, txt3->next);
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ares_free_data(txt);
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}
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TEST_F(LibraryTest, ParseTxtExtReplyOK) {
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DNSPacket pkt;
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std::string expected1 = "txt1.example.com";
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std::string expected2a = "txt2a";
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std::string expected2b("ABC\0ABC", 7);
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("example.com", ns_t_mx))
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.add_answer(new DNSTxtRR("example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
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std::vector<byte> data = pkt.data();
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struct ares_txt_ext* txt = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_txt_reply_ext(data.data(), data.size(), &txt));
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ASSERT_NE(nullptr, txt);
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EXPECT_EQ(std::vector<byte>(expected1.data(), expected1.data() + expected1.size()),
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std::vector<byte>(txt->txt, txt->txt + txt->length));
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EXPECT_EQ(1, txt->record_start);
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struct ares_txt_ext* txt2 = txt->next;
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ASSERT_NE(nullptr, txt2);
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EXPECT_EQ(std::vector<byte>(expected2a.data(), expected2a.data() + expected2a.size()),
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std::vector<byte>(txt2->txt, txt2->txt + txt2->length));
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EXPECT_EQ(1, txt2->record_start);
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struct ares_txt_ext* txt3 = txt2->next;
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ASSERT_NE(nullptr, txt3);
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EXPECT_EQ(std::vector<byte>(expected2b.data(), expected2b.data() + expected2b.size()),
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std::vector<byte>(txt3->txt, txt3->txt + txt3->length));
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EXPECT_EQ(nullptr, txt3->next);
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EXPECT_EQ(0, txt3->record_start);
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ares_free_data(txt);
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}
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TEST_F(LibraryTest, ParseTxtMalformedReply1) {
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std::vector<byte> data = {
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0x12, 0x34, // qid
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0x84, // response + query + AA + not-TC + not-RD
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
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0x00, 0x01, // num questions
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0x00, 0x01, // num answer RRs
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0x00, 0x00, // num authority RRs
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0x00, 0x00, // num additional RRs
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// Question
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // type TXT
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0x00, 0x01, // class IN
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// Answer 1
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // RR type
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0x00, 0x01, // class IN
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0x01, 0x02, 0x03, 0x04, // TTL
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0x00, 0x03, // rdata length
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0x12, 'a', 'b', // invalid length
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};
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struct ares_txt_reply* txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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ASSERT_EQ(nullptr, txt);
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}
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TEST_F(LibraryTest, ParseTxtMalformedReply2) {
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std::vector<byte> data = {
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0x12, 0x34, // qid
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0x84, // response + query + AA + not-TC + not-RD
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
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0x00, 0x01, // num questions
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0x00, 0x01, // num answer RRs
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0x00, 0x00, // num authority RRs
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0x00, 0x00, // num additional RRs
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// Question
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // type TXT
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0x00, 0x01, // class IN
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// Answer 1
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // RR type
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// truncated
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};
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struct ares_txt_reply* txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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ASSERT_EQ(nullptr, txt);
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}
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TEST_F(LibraryTest, ParseTxtMalformedReply3) {
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std::vector<byte> data = {
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0x12, 0x34, // qid
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0x84, // response + query + AA + not-TC + not-RD
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
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0x00, 0x01, // num questions
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0x00, 0x01, // num answer RRs
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0x00, 0x00, // num authority RRs
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0x00, 0x00, // num additional RRs
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// Question
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // type TXT
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0x00, 0x01, // class IN
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// Answer 1
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // RR type
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0x00, 0x01, // class IN
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0x01, 0x02, 0x03, 0x04, // TTL
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0x00, 0x13, // rdata length INVALID
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0x02, 'a', 'b',
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};
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struct ares_txt_reply* txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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ASSERT_EQ(nullptr, txt);
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}
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TEST_F(LibraryTest, ParseTxtMalformedReply4) {
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std::vector<byte> data = {
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0x12, 0x34, // qid
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0x84, // response + query + AA + not-TC + not-RD
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0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
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0x00, 0x01, // num questions
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0x00, 0x01, // num answer RRs
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0x00, 0x00, // num authority RRs
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0x00, 0x00, // num additional RRs
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// Question
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0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
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0x03, 'c', 'o', 'm',
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0x00,
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0x00, 0x10, // type TXT
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0x00, // TRUNCATED
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};
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struct ares_txt_reply* txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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ASSERT_EQ(nullptr, txt);
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}
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TEST_F(LibraryTest, ParseTxtReplyErrors) {
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DNSPacket pkt;
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std::string expected1 = "txt1.example.com";
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std::string expected2a = "txt2a";
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std::string expected2b = "txt2b";
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("example.com", ns_t_mx))
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.add_answer(new DNSTxtRR("example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("example.com", 100, {expected2a, expected2b}));
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std::vector<byte> data = pkt.data();
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struct ares_txt_reply* txt = nullptr;
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// No question.
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pkt.questions_.clear();
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data = pkt.data();
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txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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EXPECT_EQ(nullptr, txt);
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pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
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#ifdef DISABLED
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// Question != answer
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("Axample.com", ns_t_txt));
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data = pkt.data();
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EXPECT_EQ(ARES_ENODATA, ares_parse_txt_reply(data.data(), data.size(), &txt));
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("example.com", ns_t_txt));
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#endif
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// Two questions.
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pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
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data = pkt.data();
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txt = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_txt_reply(data.data(), data.size(), &txt));
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EXPECT_EQ(nullptr, txt);
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("example.com", ns_t_mx));
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// No answer.
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pkt.answers_.clear();
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data = pkt.data();
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txt = nullptr;
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EXPECT_EQ(ARES_ENODATA, ares_parse_txt_reply(data.data(), data.size(), &txt));
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EXPECT_EQ(nullptr, txt);
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pkt.add_answer(new DNSTxtRR("example.com", 100, {expected1}));
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// Truncated packets.
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for (size_t len = 1; len < data.size(); len++) {
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txt = nullptr;
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EXPECT_NE(ARES_SUCCESS, ares_parse_txt_reply(data.data(), len, &txt));
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EXPECT_EQ(nullptr, txt);
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}
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}
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TEST_F(LibraryTest, ParseTxtReplyAllocFail) {
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DNSPacket pkt;
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std::string expected1 = "txt1.example.com";
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std::string expected2a = "txt2a";
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std::string expected2b = "txt2b";
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("example.com", ns_t_mx))
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.add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
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.add_answer(new DNSTxtRR("c.example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("c.example.com", 100, {expected1}))
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.add_answer(new DNSTxtRR("c.example.com", 100, {expected2a, expected2b}));
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std::vector<byte> data = pkt.data();
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struct ares_txt_reply* txt = nullptr;
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for (int ii = 1; ii <= 13; ii++) {
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ClearFails();
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SetAllocFail(ii);
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EXPECT_EQ(ARES_ENOMEM, ares_parse_txt_reply(data.data(), data.size(), &txt)) << ii;
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}
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}
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} // namespace test
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} // namespace ares
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