c-ares/test/ares-test-parse-soa.cc

/*
 * Copyright (C) The c-ares project
 *
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * SPDX-License-Identifier: MIT
 */
#include "ares-test.h"
#include "dns-proto.h"

#include <sstream>
#include <vector>

namespace ares {
namespace test {

TEST_F(LibraryTest, ParseSoaReplyOK) {
  DNSPacket pkt;
  pkt.set_qid(0x1234).set_response().set_aa()
    .add_question(new DNSQuestion("example.com", T_SOA))
    .add_answer(new DNSSoaRR("example.com", 100,
                             "soa1.example.com", "fred.example.com",
                             1, 2, 3, 4, 5));
  std::vector<byte> data = pkt.data();

  struct ares_soa_reply* soa = nullptr;
  EXPECT_EQ(ARES_SUCCESS, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  ASSERT_NE(nullptr, soa);
  EXPECT_EQ("soa1.example.com", std::string(soa->nsname));
  EXPECT_EQ("fred.example.com", std::string(soa->hostmaster));
  EXPECT_EQ((unsigned int)1, soa->serial);
  EXPECT_EQ((unsigned int)2, soa->refresh);
  EXPECT_EQ((unsigned int)3, soa->retry);
  EXPECT_EQ((unsigned int)4, soa->expire);
  EXPECT_EQ((unsigned int)5, soa->minttl);
  ares_free_data(soa);
}

TEST_F(LibraryTest, ParseSoaReplyErrors) {
  DNSPacket pkt;
  pkt.set_qid(0x1234).set_response().set_aa()
    .add_question(new DNSQuestion("example.com", T_SOA))
    .add_answer(new DNSSoaRR("example.com", 100,
                             "soa1.example.com", "fred.example.com",
                             1, 2, 3, 4, 5));
  std::vector<byte> data;
  struct ares_soa_reply* soa = nullptr;

  // No question.
  pkt.questions_.clear();
  data = pkt.data();
  EXPECT_EQ(ARES_EBADRESP, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  pkt.add_question(new DNSQuestion("example.com", T_SOA));

#ifdef DISABLED
  // Question != answer
  pkt.questions_.clear();
  pkt.add_question(new DNSQuestion("Axample.com", T_SOA));
  data = pkt.data();
  EXPECT_EQ(ARES_EBADRESP, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  pkt.questions_.clear();
  pkt.add_question(new DNSQuestion("example.com", T_SOA));
#endif

  // Two questions
  pkt.add_question(new DNSQuestion("example.com", T_SOA));
  data = pkt.data();
  EXPECT_EQ(ARES_EBADRESP, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  pkt.questions_.clear();
  pkt.add_question(new DNSQuestion("example.com", T_SOA));

  // 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_EBADRESP, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  pkt.answers_.clear();
  pkt.add_answer(new DNSSoaRR("example.com", 100,
                             "soa1.example.com", "fred.example.com",
                             1, 2, 3, 4, 5));

  // No answer.
  pkt.answers_.clear();
  data = pkt.data();
  EXPECT_EQ(ARES_EBADRESP, ares_parse_soa_reply(data.data(), (int)data.size(), &soa));
  pkt.add_answer(new DNSSoaRR("example.com", 100,
                             "soa1.example.com", "fred.example.com",
                             1, 2, 3, 4, 5));

  // Truncated packets.
  data = pkt.data();
  for (size_t len = 1; len < data.size(); len++) {
    EXPECT_EQ(ARES_EBADRESP, ares_parse_soa_reply(data.data(), (int)len, &soa));
  }
}

TEST_F(LibraryTest, ParseSoaReplyAllocFail) {
  DNSPacket pkt;
  pkt.set_qid(0x1234).set_response().set_aa()
    .add_question(new DNSQuestion("example.com", T_SOA))
    .add_answer(new DNSSoaRR("example.com", 100,
                             "soa1.example.com", "fred.example.com",
                             1, 2, 3, 4, 5));
  std::vector<byte> data = pkt.data();
  struct ares_soa_reply* soa = nullptr;

  for (int ii = 1; ii <= 5; ii++) {
    ClearFails();
    SetAllocFail(ii);
    EXPECT_EQ(ARES_ENOMEM, ares_parse_soa_reply(data.data(), (int)data.size(), &soa)) << ii;
  }
}

}  // namespace test
}  // namespace ares