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-rw-r--r--src/c-ares/test/ares-test-parse.cc219
1 files changed, 219 insertions, 0 deletions
diff --git a/src/c-ares/test/ares-test-parse.cc b/src/c-ares/test/ares-test-parse.cc
new file mode 100644
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+++ b/src/c-ares/test/ares-test-parse.cc
@@ -0,0 +1,219 @@
+#include "ares-test.h"
+#include "dns-proto.h"
+
+#include <sstream>
+#include <vector>
+
+namespace ares {
+namespace test {
+
+TEST_F(LibraryTest, ParseRootName) {
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).set_response().set_aa()
+ .add_question(new DNSQuestion(".", ns_t_a))
+ .add_answer(new DNSARR(".", 100, {0x02, 0x03, 0x04, 0x05}));
+ std::vector<byte> data = pkt.data();
+
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ EXPECT_EQ(1, count);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'' aliases=[] addrs=[2.3.4.5]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParseIndirectRootName) {
+ std::vector<byte> data = {
+ 0x12, 0x34, // qid
+ 0x84, // response + query + AA + not-TC + not-RD
+ 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
+ 0x00, 0x01, // num questions
+ 0x00, 0x01, // num answer RRs
+ 0x00, 0x00, // num authority RRs
+ 0x00, 0x00, // num additional RRs
+ // Question
+ 0xC0, 0x04, // weird: pointer to a random zero earlier in the message
+ 0x00, 0x01, // type A
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0xC0, 0x04,
+ 0x00, 0x01, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x04, // rdata length
+ 0x02, 0x03, 0x04, 0x05,
+ };
+
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ EXPECT_EQ(1, count);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'' aliases=[] addrs=[2.3.4.5]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParseEscapedName) {
+ std::vector<byte> data = {
+ 0x12, 0x34, // qid
+ 0x84, // response + query + AA + not-TC + not-RD
+ 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
+ 0x00, 0x01, // num questions
+ 0x00, 0x01, // num answer RRs
+ 0x00, 0x00, // num authority RRs
+ 0x00, 0x00, // num additional RRs
+ // Question
+ 0x05, 'a', '\\', 'b', '.', 'c',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x01, // type A
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x05, 'a', '\\', 'b', '.', 'c',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x01, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x04, // rdata length
+ 0x02, 0x03, 0x04, 0x05,
+ };
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ EXPECT_EQ(1, count);
+ HostEnt hent(host);
+ std::stringstream ss;
+ ss << hent;
+ // The printable name is expanded with escapes.
+ EXPECT_EQ(11, hent.name_.size());
+ EXPECT_EQ('a', hent.name_[0]);
+ EXPECT_EQ('\\', hent.name_[1]);
+ EXPECT_EQ('\\', hent.name_[2]);
+ EXPECT_EQ('b', hent.name_[3]);
+ EXPECT_EQ('\\', hent.name_[4]);
+ EXPECT_EQ('.', hent.name_[5]);
+ EXPECT_EQ('c', hent.name_[6]);
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParsePartialCompressedName) {
+ std::vector<byte> data = {
+ 0x12, 0x34, // qid
+ 0x84, // response + query + AA + not-TC + not-RD
+ 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
+ 0x00, 0x01, // num questions
+ 0x00, 0x01, // num answer RRs
+ 0x00, 0x00, // num authority RRs
+ 0x00, 0x00, // num additional RRs
+ // Question
+ 0x03, 'w', 'w', 'w',
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x01, // type A
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x03, 'w', 'w', 'w',
+ 0xc0, 0x10, // offset 16
+ 0x00, 0x01, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x04, // rdata length
+ 0x02, 0x03, 0x04, 0x05,
+ };
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParseFullyCompressedName) {
+ std::vector<byte> data = {
+ 0x12, 0x34, // qid
+ 0x84, // response + query + AA + not-TC + not-RD
+ 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
+ 0x00, 0x01, // num questions
+ 0x00, 0x01, // num answer RRs
+ 0x00, 0x00, // num authority RRs
+ 0x00, 0x00, // num additional RRs
+ // Question
+ 0x03, 'w', 'w', 'w',
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x01, // type A
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0xc0, 0x0c, // offset 12
+ 0x00, 0x01, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x04, // rdata length
+ 0x02, 0x03, 0x04, 0x05,
+ };
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
+ ares_free_hostent(host);
+}
+
+TEST_F(LibraryTest, ParseFullyCompressedName2) {
+ std::vector<byte> data = {
+ 0x12, 0x34, // qid
+ 0x84, // response + query + AA + not-TC + not-RD
+ 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
+ 0x00, 0x01, // num questions
+ 0x00, 0x01, // num answer RRs
+ 0x00, 0x00, // num authority RRs
+ 0x00, 0x00, // num additional RRs
+ // Question
+ 0xC0, 0x12, // pointer to later in message
+ 0x00, 0x01, // type A
+ 0x00, 0x01, // class IN
+ // Answer 1
+ 0x03, 'w', 'w', 'w',
+ 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+ 0x03, 'c', 'o', 'm',
+ 0x00,
+ 0x00, 0x01, // RR type
+ 0x00, 0x01, // class IN
+ 0x01, 0x02, 0x03, 0x04, // TTL
+ 0x00, 0x04, // rdata length
+ 0x02, 0x03, 0x04, 0x05,
+ };
+ struct hostent *host = nullptr;
+ struct ares_addrttl info[2];
+ int count = 2;
+ EXPECT_EQ(ARES_SUCCESS, ares_parse_a_reply(data.data(), data.size(),
+ &host, info, &count));
+ ASSERT_NE(nullptr, host);
+ std::stringstream ss;
+ ss << HostEnt(host);
+ EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
+ ares_free_hostent(host);
+}
+
+} // namespace test
+} // namespace ares
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