1 files changed, 191 insertions, 0 deletions
diff --git a/src/c-ares/test/ares-test-parse-aaaa.cc b/src/c-ares/test/ares-test-parse-aaaa.cc
new file mode 100644
index 000000000..9d0457e68
--- /dev/null
+++ b/src/c-ares/test/ares-test-parse-aaaa.cc
@@ -0,0 +1,191 @@
+#include "ares-test.h"
+#include "dns-proto.h"
+
+#include <sstream>
+#include <vector>
+
+namespace ares {
+namespace test {
+
+TEST_F(LibraryTest, ParseAaaaReplyOK) {
+  DNSPacket pkt;
+  pkt.set_qid(0x1234).set_response().set_aa()
+    .add_question(new DNSQuestion("example.com", ns_t_aaaa))
+    .add_answer(new DNSAaaaRR("example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+  std::vector<byte> data = pkt.data();
+  struct hostent *host = nullptr;
+  struct ares_addr6ttl info[5];
+  int count = 5;
+  EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(1, count);
+  EXPECT_EQ(100, info[0].ttl);
+  EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
+  EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
+  ASSERT_NE(nullptr, host);
+  std::stringstream ss;
+  ss << HostEnt(host);
+  EXPECT_EQ("{'example.com' aliases=[] addrs=[0101:0101:0202:0202:0303:0303:0404:0404]}", ss.str());
+  ares_free_hostent(host);
+
+  // Repeat without providing places to put the results
+  count = 0;
+  EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                nullptr, info, &count));
+}
+
+TEST_F(LibraryTest, ParseAaaaReplyCname) {
+  DNSPacket pkt;
+  pkt.set_qid(0x1234).set_response().set_aa()
+    .add_question(new DNSQuestion("example.com", ns_t_aaaa))
+    .add_answer(new DNSCnameRR("example.com", 50, "c.example.com"))
+    .add_answer(new DNSAaaaRR("c.example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+  std::vector<byte> data = pkt.data();
+  struct hostent *host = nullptr;
+  struct ares_addr6ttl info[5];
+  int count = 5;
+  EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(1, count);
+  // CNAME TTL overrides AAAA TTL.
+  EXPECT_EQ(50, info[0].ttl);
+  EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
+  EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
+  ASSERT_NE(nullptr, host);
+  std::stringstream ss;
+  ss << HostEnt(host);
+  EXPECT_EQ("{'c.example.com' aliases=[example.com] addrs=[0101:0101:0202:0202:0303:0303:0404:0404]}", ss.str());
+  ares_free_hostent(host);
+
+  // Repeat without providing a hostent
+  count = 5;
+  EXPECT_EQ(ARES_SUCCESS, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                nullptr, info, &count));
+  EXPECT_EQ(1, count);
+  EXPECT_EQ(50, info[0].ttl);
+  EXPECT_EQ(0x01, info[0].ip6addr._S6_un._S6_u8[0]);
+  EXPECT_EQ(0x02, info[0].ip6addr._S6_un._S6_u8[4]);
+}
+
+TEST_F(LibraryTest, ParseAaaaReplyNoData) {
+  DNSPacket pkt;
+  pkt.set_qid(0x1234).set_response().set_aa()
+    .add_question(new DNSQuestion("example.com", ns_t_aaaa));
+  std::vector<byte> data = pkt.data();
+  struct hostent *host = nullptr;
+  struct ares_addr6ttl info[2];
+  int count = 2;
+  EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_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_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(0, count);
+  EXPECT_EQ(nullptr, host);
+}
+
+TEST_F(LibraryTest, ParseAaaaReplyErrors) {
+  DNSPacket pkt;
+  pkt.set_qid(0x1234).set_response().set_aa()
+    .add_question(new DNSQuestion("example.com", ns_t_aaaa))
+    .add_answer(new DNSAaaaRR("example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+  std::vector<byte> data;
+
+  struct hostent *host = nullptr;
+  struct ares_addr6ttl info[2];
+  int count = 2;
+
+  // No question.
+  pkt.questions_.clear();
+  data = pkt.data();
+  EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                 &host, info, &count));
+  EXPECT_EQ(nullptr, host);
+  pkt.add_question(new DNSQuestion("example.com", ns_t_aaaa));
+
+  // Question != answer
+  pkt.questions_.clear();
+  pkt.add_question(new DNSQuestion("Axample.com", ns_t_aaaa));
+  data = pkt.data();
+  EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(nullptr, host);
+  pkt.questions_.clear();
+  pkt.add_question(new DNSQuestion("example.com", ns_t_aaaa));
+
+  // Two questions.
+  pkt.add_question(new DNSQuestion("example.com", ns_t_aaaa));
+  data = pkt.data();
+  EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                 &host, info, &count));
+  EXPECT_EQ(nullptr, host);
+  pkt.questions_.clear();
+  pkt.add_question(new DNSQuestion("example.com", ns_t_aaaa));
+
+  // 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_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(nullptr, host);
+  pkt.answers_.clear();
+  pkt.add_answer(new DNSAaaaRR("example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+
+  // No answer.
+  pkt.answers_.clear();
+  data = pkt.data();
+  EXPECT_EQ(ARES_ENODATA, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                &host, info, &count));
+  EXPECT_EQ(nullptr, host);
+  pkt.add_answer(new DNSAaaaRR("example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+
+  // Truncated packets.
+  data = pkt.data();
+  for (size_t len = 1; len < data.size(); len++) {
+    EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), len,
+                                                   &host, info, &count));
+    EXPECT_EQ(nullptr, host);
+    EXPECT_EQ(ARES_EBADRESP, ares_parse_aaaa_reply(data.data(), len,
+                                                   nullptr, info, &count));
+  }
+}
+
+TEST_F(LibraryTest, ParseAaaaReplyAllocFail) {
+  DNSPacket pkt;
+  pkt.set_qid(0x1234).set_response().set_aa()
+    .add_question(new DNSQuestion("example.com", ns_t_aaaa))
+    .add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
+    .add_answer(new DNSAaaaRR("c.example.com", 100,
+                              {0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
+                               0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04}));
+  std::vector<byte> data = pkt.data();
+  struct hostent *host = nullptr;
+  struct ares_addr6ttl info[2];
+  int count = 2;
+
+  for (int ii = 1; ii <= 8; ii++) {
+    ClearFails();
+    SetAllocFail(ii);
+    EXPECT_EQ(ARES_ENOMEM, ares_parse_aaaa_reply(data.data(), data.size(),
+                                                 &host, info, &count)) << ii;
+    EXPECT_EQ(nullptr, host);
+  }
+}
+
+}  // namespace test
+}  // namespace ares