Restoring authorship annotation for <dvshkurko@yandex-team.ru>. Commit 1 of 2.

1 files changed, 249 insertions, 249 deletions

diff --git a/contrib/libs/c-ares/test/ares-test-parse-ptr.cc b/contrib/libs/c-ares/test/ares-test-parse-ptr.cc
index 75f74c16f7..7b1a86bac0 100644
--- a/contrib/libs/c-ares/test/ares-test-parse-ptr.cc
+++ b/contrib/libs/c-ares/test/ares-test-parse-ptr.cc
@@ -1,249 +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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-  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, NULL));
-    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, NULL));
-    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, NULL)) << 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, NULL);
-    if (rc != ARES_ENOMEM) {
-      EXPECT_EQ(ARES_SUCCESS, rc);
-      ares_free_hostent(host);
-      host = nullptr;
-    }
-  }
-}
-
-
-}  // namespace test
-}  // namespace ares
+#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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+  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, NULL)); 
+    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, NULL)); 
+    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, NULL)) << 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, NULL); 
+    if (rc != ARES_ENOMEM) { 
+      EXPECT_EQ(ARES_SUCCESS, rc); 
+      ares_free_hostent(host); 
+      host = nullptr; 
+    } 
+  } 
+} 
+ 
+ 
+}  // namespace test 
+}  // namespace ares