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dns_client: retry when upstream result is empty.

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This commit is contained in:
Nick Peng
2023-12-19 22:29:44 +08:00
parent a19ac7eb07
commit 1d46fa6208
8 changed files with 209 additions and 9 deletions
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66
test/cases/test-server.cc
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@@ -104,3 +104,69 @@ cache-persist no)""");
EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
}
TEST_F(Server, retry_no_result_with_NOERROR)
{
smartdns::MockServer server_upstream;
smartdns::MockServer server_upstream1;
smartdns::Server server;
int count = 0;
server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
if (request->qtype != DNS_T_A) {
return smartdns::SERVER_REQUEST_SOA;
}
if (count++ < 2) {
dns_add_domain(request->response_packet, request->domain.c_str(), request->qtype, request->qclass);
return smartdns::SERVER_REQUEST_OK;
}
smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 611);
return smartdns::SERVER_REQUEST_OK;
});
server.Start(R"""(bind [::]:60053
bind-tcp [::]:60053
server 127.0.0.1:61053
log-num 0
log-console yes
dualstack-ip-selection no
log-level debug
cache-persist no)""");
smartdns::Client client;
ASSERT_TRUE(client.Query("a.com", 60053));
std::cout << client.GetResult() << std::endl;
ASSERT_EQ(client.GetAnswerNum(), 1);
EXPECT_EQ(client.GetStatus(), "NOERROR");
EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
}
TEST_F(Server, retry_no_response)
{
smartdns::MockServer server_upstream;
smartdns::MockServer server_upstream1;
smartdns::Server server;
int count = 0;
server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
count++;
return smartdns::SERVER_REQUEST_NO_RESPONSE;
});
server.Start(R"""(bind [::]:60053
bind-tcp [::]:60053
server 127.0.0.1:61053
log-num 0
log-console yes
log-level debug
cache-persist no)""");
smartdns::Client client;
ASSERT_TRUE(client.Query("a.com", 60053));
std::cout << client.GetResult() << std::endl;
ASSERT_EQ(client.GetAnswerNum(), 0);
EXPECT_EQ(client.GetStatus(), "SERVFAIL");
EXPECT_GE(client.GetQueryTime(), 1500);
EXPECT_GE(count, 8);
}