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-rw-r--r--test/ares-test-parse-a.cc362
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diff --git a/test/ares-test-parse-a.cc b/test/ares-test-parse-a.cc
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-#include "ares-test.h"
-#include "dns-proto.h"
-
-#include <sstream>
-#include <vector>
-
-namespace ares {
-namespace test {
-
-TEST_F(LibraryTest, ParseAReplyOK) {
- DNSPacket pkt;
- pkt.set_qid(0x1234).set_response().set_aa()
- .add_question(new DNSQuestion("example.com", ns_t_a))
- .add_answer(new DNSARR("example.com", 0x01020304, {2,3,4,5}));
- 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, 0x01, // type A
- 0x00, 0x01, // class IN
- // Answer 1
- 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
- 0x03, 'c', 'o', 'm',
- 0x00,
- 0x00, 0x01, // RR type
- 0x00, 0x01, // class IN
- 0x01, 0x02, 0x03, 0x04, // TTL
- 0x00, 0x04, // rdata length
- 0x02, 0x03, 0x04, 0x05,
- };
- EXPECT_EQ(data, pkt.data());
- struct hostent *host = nullptr;
- struct ares_addrttl info[5];
- int count = 5;
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(1, count);
- EXPECT_EQ(0x01020304, info[0].ttl);
- unsigned long expected_addr = htonl(0x02030405);
- EXPECT_EQ(expected_addr, info[0].ipaddr.s_addr);
- EXPECT_EQ("2.3.4.5", AddressToString(&(info[0].ipaddr), 4));
- ASSERT_NE(nullptr, host);
- std::stringstream ss;
- ss << HostEnt(host);
- EXPECT_EQ("{'example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
- ares_free_hostent(host);
-
- // Repeat without providing a hostent
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- nullptr, info, &count));
- EXPECT_EQ(1, count);
- EXPECT_EQ(0x01020304, info[0].ttl);
- EXPECT_EQ(expected_addr, info[0].ipaddr.s_addr);
- EXPECT_EQ("2.3.4.5", AddressToString(&(info[0].ipaddr), 4));
-}
-
-TEST_F(LibraryTest, ParseMalformedAReply) {
- std::vector<byte> data = {
- 0x12, 0x34, // [0:2) qid
- 0x84, // [2] response + query + AA + not-TC + not-RD
- 0x00, // [3] not-RA + not-Z + not-AD + not-CD + rc=NoError
- 0x00, 0x01, // [4:6) num questions
- 0x00, 0x01, // [6:8) num answer RRs
- 0x00, 0x00, // [8:10) num authority RRs
- 0x00, 0x00, // [10:12) num additional RRs
- // Question
- 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e', // [12:20)
- 0x03, 'c', 'o', 'm', // [20,24)
- 0x00, // [24]
- 0x00, 0x01, // [25:26) type A
- 0x00, 0x01, // [27:29) class IN
- // Answer 1
- 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e', // [29:37)
- 0x03, 'c', 'o', 'm', // [37:41)
- 0x00, // [41]
- 0x00, 0x01, // [42:44) RR type
- 0x00, 0x01, // [44:46) class IN
- 0x01, 0x02, 0x03, 0x04, // [46:50) TTL
- 0x00, 0x04, // [50:52) rdata length
- 0x02, 0x03, 0x04, 0x05, // [52,56)
- };
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
-
- // Invalid RR-len.
- std::vector<byte> invalid_rrlen(data);
- invalid_rrlen[51] = 180;
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(invalid_rrlen.data(), invalid_rrlen.size(),
- &host, info, &count));
-
- // Truncate mid-question.
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), 26,
- &host, info, &count));
-
- // Truncate mid-answer.
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), 42,
- &host, info, &count));
-}
-
-TEST_F(LibraryTest, ParseAReplyNoData) {
- DNSPacket pkt;
- pkt.set_qid(0x1234).set_response().set_aa()
- .add_question(new DNSQuestion("example.com", ns_t_a));
- std::vector<byte> data = pkt.data();
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
- EXPECT_EQ(ARES_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(0, count);
- EXPECT_EQ(nullptr, host);
-
- // Again but with a CNAME.
- pkt.add_answer(new DNSCnameRR("example.com", 200, "c.example.com"));
- EXPECT_EQ(ARES_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(0, count);
- EXPECT_EQ(nullptr, host);
-}
-
-TEST_F(LibraryTest, ParseAReplyVariantA) {
- DNSPacket pkt;
- pkt.set_qid(6366).set_rd().set_ra()
- .add_question(new DNSQuestion("mit.edu", ns_t_a))
- .add_answer(new DNSARR("mit.edu", 52, {18,7,22,69}))
- .add_auth(new DNSNsRR("mit.edu", 292, "W20NS.mit.edu"))
- .add_auth(new DNSNsRR("mit.edu", 292, "BITSY.mit.edu"))
- .add_auth(new DNSNsRR("mit.edu", 292, "STRAWB.mit.edu"))
- .add_additional(new DNSARR("STRAWB.mit.edu", 292, {18,71,0,151}));
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
- std::vector<byte> data = pkt.data();
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(1, count);
- EXPECT_EQ("18.7.22.69", AddressToString(&(info[0].ipaddr), 4));
- EXPECT_EQ(52, info[0].ttl);
- ares_free_hostent(host);
-}
-
-TEST_F(LibraryTest, ParseAReplyJustCname) {
- DNSPacket pkt;
- pkt.set_qid(6366).set_rd().set_ra()
- .add_question(new DNSQuestion("mit.edu", ns_t_a))
- .add_answer(new DNSCnameRR("mit.edu", 52, "other.mit.edu"));
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
- std::vector<byte> data = pkt.data();
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(0, count);
- ASSERT_NE(nullptr, host);
- std::stringstream ss;
- ss << HostEnt(host);
- EXPECT_EQ("{'other.mit.edu' aliases=[mit.edu] addrs=[]}", ss.str());
- ares_free_hostent(host);
-}
-
-TEST_F(LibraryTest, ParseAReplyVariantCname) {
- DNSPacket pkt;
- pkt.set_qid(6366).set_rd().set_ra()
- .add_question(new DNSQuestion("query.example.com", ns_t_a))
- .add_answer(new DNSCnameRR("query.example.com", 200, "redirect.query.example.com"))
- .add_answer(new DNSARR("redirect.query.example.com", 300, {129,97,123,22}))
- .add_auth(new DNSNsRR("example.com", 218, "aa.ns1.example.com"))
- .add_auth(new DNSNsRR("example.com", 218, "ns2.example.com"))
- .add_auth(new DNSNsRR("example.com", 218, "ns3.example.com"))
- .add_auth(new DNSNsRR("example.com", 218, "ns4.example.com"))
- .add_additional(new DNSARR("aa.ns1.example.com", 218, {129,97,1,1}))
- .add_additional(new DNSARR("ns2.example.com", 218, {129,97,1,2}))
- .add_additional(new DNSARR("ns3.example.com", 218, {129,97,1,3}))
- .add_additional(new DNSARR("ns4.example.com", 218, {129,97,1,4}));
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
- std::vector<byte> data = pkt.data();
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(1, count);
- EXPECT_EQ("129.97.123.22", AddressToString(&(info[0].ipaddr), 4));
- // TTL is reduced to match CNAME's.
- EXPECT_EQ(200, info[0].ttl);
- ares_free_hostent(host);
-
- // Repeat parsing without places to put the results.
- count = 0;
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- nullptr, info, &count));
-}
-
-TEST_F(LibraryTest, ParseAReplyVariantCnameChain) {
- DNSPacket pkt;
- pkt.set_qid(6366).set_rd().set_ra()
- .add_question(new DNSQuestion("c1.localhost", ns_t_a))
- .add_answer(new DNSCnameRR("c1.localhost", 604800, "c2.localhost"))
- .add_answer(new DNSCnameRR("c2.localhost", 604800, "c3.localhost"))
- .add_answer(new DNSCnameRR("c3.localhost", 604800, "c4.localhost"))
- .add_answer(new DNSARR("c4.localhost", 604800, {8,8,8,8}))
- .add_auth(new DNSNsRR("localhost", 604800, "localhost"))
- .add_additional(new DNSARR("localhost", 604800, {127,0,0,1}))
- .add_additional(new DNSAaaaRR("localhost", 604800,
- {0x7F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}));
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
- std::vector<byte> data = pkt.data();
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(1, count);
- EXPECT_EQ("8.8.8.8", AddressToString(&(info[0].ipaddr), 4));
- EXPECT_EQ(604800, info[0].ttl);
- ares_free_hostent(host);
-}
-
-TEST_F(LibraryTest, DISABLED_ParseAReplyVariantCnameLast) {
- DNSPacket pkt;
- pkt.set_qid(6366).set_rd().set_ra()
- .add_question(new DNSQuestion("query.example.com", ns_t_a))
- .add_answer(new DNSARR("redirect.query.example.com", 300, {129,97,123,221}))
- .add_answer(new DNSARR("redirect.query.example.com", 300, {129,97,123,222}))
- .add_answer(new DNSARR("redirect.query.example.com", 300, {129,97,123,223}))
- .add_answer(new DNSARR("redirect.query.example.com", 300, {129,97,123,224}))
- .add_answer(new DNSCnameRR("query.example.com", 60, "redirect.query.example.com"))
- .add_additional(new DNSTxtRR("query.example.com", 60, {"text record"}));
- struct hostent *host = nullptr;
- struct ares_addrttl info[8];
- int count = 8;
- std::vector<byte> data = pkt.data();
- EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(4, count);
- EXPECT_EQ("129.97.123.221", AddressToString(&(info[0].ipaddr), 4));
- EXPECT_EQ("129.97.123.222", AddressToString(&(info[1].ipaddr), 4));
- EXPECT_EQ("129.97.123.223", AddressToString(&(info[2].ipaddr), 4));
- EXPECT_EQ("129.97.123.224", AddressToString(&(info[3].ipaddr), 4));
- EXPECT_EQ(300, info[0].ttl);
- EXPECT_EQ(300, info[1].ttl);
- EXPECT_EQ(300, info[2].ttl);
- EXPECT_EQ(300, info[3].ttl);
- ares_free_hostent(host);
-}
-
-TEST_F(LibraryTest, ParseAReplyErrors) {
- DNSPacket pkt;
- pkt.set_qid(0x1234).set_response().set_aa()
- .add_question(new DNSQuestion("example.com", ns_t_a))
- .add_answer(new DNSARR("example.com", 100, {0x02, 0x03, 0x04, 0x05}));
- std::vector<byte> data;
-
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
-
- // No question.
- pkt.questions_.clear();
- data = pkt.data();
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.add_question(new DNSQuestion("example.com", ns_t_a));
-
- // Question != answer
- pkt.questions_.clear();
- pkt.add_question(new DNSQuestion("Axample.com", ns_t_a));
- data = pkt.data();
- EXPECT_EQ(ARES_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.questions_.clear();
- pkt.add_question(new DNSQuestion("example.com", ns_t_a));
-
-#ifdef DISABLED
- // Not a response.
- pkt.set_response(false);
- data = pkt.data();
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.set_response(true);
-
- // Bad return code.
- pkt.set_rcode(ns_r_formerr);
- data = pkt.data();
- EXPECT_EQ(ARES_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.set_rcode(ns_r_noerror);
-#endif
-
- // Two questions
- pkt.add_question(new DNSQuestion("example.com", ns_t_a));
- data = pkt.data();
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.questions_.clear();
- pkt.add_question(new DNSQuestion("example.com", ns_t_a));
-
- // 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_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.answers_.clear();
- pkt.add_answer(new DNSARR("example.com", 100, {0x02, 0x03, 0x04, 0x05}));
-
- // No answer.
- pkt.answers_.clear();
- data = pkt.data();
- EXPECT_EQ(ARES_ENODATA, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- pkt.add_answer(new DNSARR("example.com", 100, {0x02, 0x03, 0x04, 0x05}));
-
- // Truncated packets.
- data = pkt.data();
- for (size_t len = 1; len < data.size(); len++) {
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), len,
- &host, info, &count));
- EXPECT_EQ(nullptr, host);
- EXPECT_EQ(ARES_EBADRESP, ares_parse_a_reply(data.data(), len,
- nullptr, info, &count));
- }
-}
-
-TEST_F(LibraryTest, ParseAReplyAllocFail) {
- DNSPacket pkt;
- pkt.set_qid(0x1234).set_response().set_aa()
- .add_question(new DNSQuestion("example.com", ns_t_a))
- .add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
- .add_answer(new DNSARR("c.example.com", 500, {0x02, 0x03, 0x04, 0x05}));
- std::vector<byte> data = pkt.data();
-
- struct hostent *host = nullptr;
- struct ares_addrttl info[2];
- int count = 2;
-
- for (int ii = 1; ii <= 8; ii++) {
- ClearFails();
- SetAllocFail(ii);
- EXPECT_EQ(ARES_ENOMEM, ares_parse_a_reply(data.data(), data.size(),
- &host, info, &count)) << ii;
- EXPECT_EQ(nullptr, host);
- }
-}
-
-} // namespace test
-} // namespace ares