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-rw-r--r--src/c-ares/test/ares-test-parse-ptr.cc249
1 files changed, 249 insertions, 0 deletions
diff --git a/src/c-ares/test/ares-test-parse-ptr.cc b/src/c-ares/test/ares-test-parse-ptr.cc
new file mode 100644
index 00000000..c769b29c
--- /dev/null
+++ b/src/c-ares/test/ares-test-parse-ptr.cc
@@ -0,0 +1,249 @@
+#include "ares-test.h"
+#include "dns-proto.h"
+
+#include <sstream>
+#include <vector>
+
+namespace ares {
+namespace test {
+
+TEST_F(LibraryTest, ParsePtrReplyOK) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParsePtrReplyCname) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"))
+ .add_answer(new DNSPtrRR("64.48.32.8.in-addr.arpa", 100, "other.com"));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
+ ares_free_hostent(host);
+}
+
+
+struct DNSMalformedCnameRR : public DNSCnameRR {
+ DNSMalformedCnameRR(const std::string& name, int ttl, const std::string& other)
+ : DNSCnameRR(name, ttl, other) {}
+ std::vector<byte> data() const {
+ std::vector<byte> data = DNSRR::data();
+ std::vector<byte> encname = EncodeString(other_);
+ encname[0] = encname[0] + 63; // invalid label length
+ int len = encname.size();
+ PushInt16(&data, len);
+ data.insert(data.end(), encname.begin(), encname.end());
+ return data;
+ }
+};
+
+TEST_F(LibraryTest, ParsePtrReplyMalformedCname) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSMalformedCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"))
+ .add_answer(new DNSPtrRR("64.48.32.8.in-addr.arpa", 100, "other.com"));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ ASSERT_EQ(nullptr, host);
+}
+
+TEST_F(LibraryTest, ParseManyPtrReply) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other4.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other5.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other6.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other7.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other8.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other9.com"));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ ASSERT_NE(nullptr, host);
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParsePtrReplyAdditional) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 55, "other.com"))
+ .add_auth(new DNSNsRR("16.in-addr.arpa", 234, "ns1.other.com"))
+ .add_auth(new DNSNsRR("16.in-addr.arpa", 234, "bb.ns2.other.com"))
+ .add_auth(new DNSNsRR("16.in-addr.arpa", 234, "ns3.other.com"))
+ .add_additional(new DNSARR("ns1.other.com", 229, {10,20,30,41}))
+ .add_additional(new DNSARR("bb.ns2.other.com", 229, {10,20,30,42}))
+ .add_additional(new DNSARR("ns3.other.com", 229, {10,20,30,43}));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParsePtrReplyErrors) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
+ std::vector<byte> data;
+ struct hostent *host = nullptr;
+
+ // No question.
+ pkt.questions_.clear();
+ data = pkt.data();
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
+
+ // Question != answer
+ pkt.questions_.clear();
+ pkt.add_question(new DNSQuestion("99.48.32.16.in-addr.arpa", ns_t_ptr));
+ data = pkt.data();
+ EXPECT_EQ(ARES_ENODATA, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ pkt.questions_.clear();
+ pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
+
+ // Two questions.
+ pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
+ data = pkt.data();
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ pkt.questions_.clear();
+ pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
+
+ // 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_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ pkt.answers_.clear();
+ pkt.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
+
+ // No answer.
+ pkt.answers_.clear();
+ data = pkt.data();
+ EXPECT_EQ(ARES_ENODATA, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ pkt.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
+
+ // Truncated packets.
+ data = pkt.data();
+ for (size_t len = 1; len < data.size(); len++) {
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), len,
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ }
+
+ // Truncated packets with CNAME.
+ pkt.add_answer(new DNSCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"));
+ data = pkt.data();
+ for (size_t len = 1; len < data.size(); len++) {
+ EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), len,
+ addrv4, sizeof(addrv4), AF_INET, &host));
+ EXPECT_EQ(nullptr, host);
+ }
+}
+
+TEST_F(LibraryTest, ParsePtrReplyAllocFailSome) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"));
+ std::vector<byte> data = pkt.data();
+ struct hostent *host = nullptr;
+
+ for (int ii = 1; ii <= 18; ii++) {
+ ClearFails();
+ SetAllocFail(ii);
+ EXPECT_EQ(ARES_ENOMEM, ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host)) << ii;
+ }
+}
+
+TEST_F(LibraryTest, ParsePtrReplyAllocFailMany) {
+ byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other4.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other5.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other6.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other7.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other8.com"))
+ .add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other9.com"));
+ std::vector<byte> data = pkt.data();
+ struct hostent *host = nullptr;
+
+ for (int ii = 1; ii <= 63; ii++) {
+ ClearFails();
+ SetAllocFail(ii);
+ int rc = ares_parse_ptr_reply(data.data(), data.size(),
+ addrv4, sizeof(addrv4), AF_INET, &host);
+ if (rc != ARES_ENOMEM) {
+ EXPECT_EQ(ARES_SUCCESS, rc);
+ ares_free_hostent(host);
+ host = nullptr;
+ }
+ }
+}
+
+
+} // namespace test
+} // namespace ares
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