250 lines
10 KiB
C++
250 lines
10 KiB
C++
#include "ares-test.h"
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#include "dns-proto.h"
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#include <sstream>
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#include <vector>
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namespace ares {
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namespace test {
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TEST_F(LibraryTest, ParsePtrReplyOK) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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ASSERT_NE(nullptr, host);
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std::stringstream ss;
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ss << HostEnt(host);
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EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
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ares_free_hostent(host);
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}
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TEST_F(LibraryTest, ParsePtrReplyCname) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"))
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.add_answer(new DNSPtrRR("64.48.32.8.in-addr.arpa", 100, "other.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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ASSERT_NE(nullptr, host);
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std::stringstream ss;
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ss << HostEnt(host);
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EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
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ares_free_hostent(host);
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}
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struct DNSMalformedCnameRR : public DNSCnameRR {
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DNSMalformedCnameRR(const std::string& name, int ttl, const std::string& other)
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: DNSCnameRR(name, ttl, other) {}
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std::vector<byte> data() const {
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std::vector<byte> data = DNSRR::data();
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std::vector<byte> encname = EncodeString(other_);
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encname[0] = encname[0] + 63; // invalid label length
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int len = encname.size();
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PushInt16(&data, len);
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data.insert(data.end(), encname.begin(), encname.end());
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return data;
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}
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};
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TEST_F(LibraryTest, ParsePtrReplyMalformedCname) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSMalformedCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"))
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.add_answer(new DNSPtrRR("64.48.32.8.in-addr.arpa", 100, "other.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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ASSERT_EQ(nullptr, host);
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}
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TEST_F(LibraryTest, ParseManyPtrReply) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other4.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other5.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other6.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other7.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other8.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other9.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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ASSERT_NE(nullptr, host);
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ares_free_hostent(host);
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}
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TEST_F(LibraryTest, ParsePtrReplyAdditional) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 55, "other.com"))
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.add_auth(new DNSNsRR("16.in-addr.arpa", 234, "ns1.other.com"))
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.add_auth(new DNSNsRR("16.in-addr.arpa", 234, "bb.ns2.other.com"))
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.add_auth(new DNSNsRR("16.in-addr.arpa", 234, "ns3.other.com"))
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.add_additional(new DNSARR("ns1.other.com", 229, {10,20,30,41}))
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.add_additional(new DNSARR("bb.ns2.other.com", 229, {10,20,30,42}))
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.add_additional(new DNSARR("ns3.other.com", 229, {10,20,30,43}));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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ASSERT_NE(nullptr, host);
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std::stringstream ss;
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ss << HostEnt(host);
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EXPECT_EQ("{'other.com' aliases=[other.com] addrs=[16.32.48.64]}", ss.str());
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ares_free_hostent(host);
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}
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TEST_F(LibraryTest, ParsePtrReplyErrors) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
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std::vector<byte> data;
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struct hostent *host = nullptr;
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// No question.
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pkt.questions_.clear();
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data = pkt.data();
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EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
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// Question != answer
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("99.48.32.16.in-addr.arpa", ns_t_ptr));
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data = pkt.data();
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EXPECT_EQ(ARES_ENODATA, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
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// Two questions.
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pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
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data = pkt.data();
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EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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pkt.questions_.clear();
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pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr));
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// Wrong sort of answer.
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pkt.answers_.clear();
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pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
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data = pkt.data();
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EXPECT_EQ(ARES_ENODATA, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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pkt.answers_.clear();
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pkt.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
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// No answer.
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pkt.answers_.clear();
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data = pkt.data();
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EXPECT_EQ(ARES_ENODATA, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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pkt.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other.com"));
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// Truncated packets.
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data = pkt.data();
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for (size_t len = 1; len < data.size(); len++) {
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EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), len,
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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}
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// Truncated packets with CNAME.
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pkt.add_answer(new DNSCnameRR("64.48.32.16.in-addr.arpa", 50, "64.48.32.8.in-addr.arpa"));
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data = pkt.data();
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for (size_t len = 1; len < data.size(); len++) {
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EXPECT_EQ(ARES_EBADRESP, ares_parse_ptr_reply(data.data(), len,
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addrv4, sizeof(addrv4), AF_INET, &host));
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EXPECT_EQ(nullptr, host);
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}
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}
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TEST_F(LibraryTest, ParsePtrReplyAllocFailSome) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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for (int ii = 1; ii <= 18; ii++) {
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ClearFails();
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SetAllocFail(ii);
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EXPECT_EQ(ARES_ENOMEM, ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host)) << ii;
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}
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}
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TEST_F(LibraryTest, ParsePtrReplyAllocFailMany) {
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byte addrv4[4] = {0x10, 0x20, 0x30, 0x40};
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DNSPacket pkt;
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pkt.set_qid(0x1234).set_response().set_aa()
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.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", ns_t_ptr))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "main.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other1.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other2.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other3.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other4.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other5.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other6.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other7.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other8.com"))
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.add_answer(new DNSPtrRR("64.48.32.16.in-addr.arpa", 100, "other9.com"));
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std::vector<byte> data = pkt.data();
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struct hostent *host = nullptr;
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for (int ii = 1; ii <= 63; ii++) {
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ClearFails();
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SetAllocFail(ii);
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int rc = ares_parse_ptr_reply(data.data(), data.size(),
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addrv4, sizeof(addrv4), AF_INET, &host);
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if (rc != ARES_ENOMEM) {
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EXPECT_EQ(ARES_SUCCESS, rc);
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ares_free_hostent(host);
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host = nullptr;
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}
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}
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}
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} // namespace test
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} // namespace ares
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