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/*
Copyright (c) 2015, Arvid Norberg
All rights reserved.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "simulator/simulator.hpp"
#include <functional>
#include "catch.hpp"
#ifdef __GNUC__
// for CATCH's CHECK macro
#pragma GCC diagnostic ignored "-Wparentheses"
#endif
using namespace std::placeholders;
using namespace sim;
using asio::ip::make_address_v4;
using asio::ip::address_v4;
using duration = chrono::high_resolution_clock::duration;
using chrono::duration_cast;
using chrono::milliseconds;
int num_lookups = 0;
void on_name_lookup(boost::system::error_code const& ec
, asio::ip::tcp::resolver::results_type ips)
{
++num_lookups;
std::vector<address_v4> expect = {
make_address_v4("1.2.3.4")
, make_address_v4("1.2.3.5")
, make_address_v4("1.2.3.6")
, make_address_v4("1.2.3.7") };
auto expect_it = expect.begin();
for (auto const& ip : ips)
{
assert(ip.endpoint().address() == *expect_it);
assert(ip.endpoint().port() == 8080);
++expect_it;
}
assert(expect_it == expect.end());
}
void on_failed_name_lookup(boost::system::error_code const& ec
, asio::ip::tcp::resolver::results_type ips)
{
++num_lookups;
assert(ec == boost::system::error_code(asio::error::host_not_found));
}
struct sim_config : sim::default_config
{
duration hostname_lookup(
asio::ip::address const& requestor
, std::string hostname
, std::vector<asio::ip::address>& result
, boost::system::error_code& ec)
{
if (hostname == "test.com")
{
result = {
make_address_v4("1.2.3.4")
, make_address_v4("1.2.3.5")
, make_address_v4("1.2.3.6")
, make_address_v4("1.2.3.7")
};
return duration_cast<duration>(chrono::milliseconds(50));
}
return default_config::hostname_lookup(requestor, hostname, result, ec);
}
};
TEST_CASE("resolve multiple IPv4 addresses", "[resolver]") {
sim_config cfg;
simulation sim(cfg);
chrono::high_resolution_clock::time_point start = chrono::high_resolution_clock::now();
num_lookups = 0;
asio::io_context ios(sim, make_address_v4("40.30.20.10"));
asio::ip::tcp::resolver resolver(ios);
resolver.async_resolve("test.com", "8080"
, std::bind(&on_name_lookup, _1, _2));
sim.run();
int millis = int(duration_cast<milliseconds>(chrono::high_resolution_clock::now() - start).count());
CHECK(millis == 50);
CHECK(num_lookups == 1);
}
TEST_CASE("resolve non-existent hostname", "[resolver]") {
sim_config cfg;
simulation sim(cfg);
chrono::high_resolution_clock::time_point start = chrono::high_resolution_clock::now();
num_lookups = 0;
asio::io_context ios(sim, make_address_v4("40.30.20.10"));
asio::ip::tcp::resolver resolver(ios);
resolver.async_resolve("non-existent.com", "8080"
, std::bind(&on_failed_name_lookup, _1, _2));
sim.run();
int millis = int(duration_cast<milliseconds>(chrono::high_resolution_clock::now() - start).count());
CHECK(millis == 100);
CHECK(num_lookups == 1);
}
TEST_CASE("lookups resolve serially, compounding the latency", "[resolver]") {
sim_config cfg;
simulation sim(cfg);
chrono::high_resolution_clock::time_point start = chrono::high_resolution_clock::now();
num_lookups = 0;
asio::io_context ios(sim, make_address_v4("40.30.20.10"));
asio::ip::tcp::resolver resolver(ios);
resolver.async_resolve("non-existent.com", "8080", std::bind(&on_failed_name_lookup, _1, _2));
resolver.async_resolve("non-existent.com", "8080", std::bind(&on_failed_name_lookup, _1, _2));
sim.run();
int millis = int(duration_cast<milliseconds>(chrono::high_resolution_clock::now() - start).count());
CHECK(millis == 200);
CHECK(num_lookups == 2);
}
TEST_CASE("resolve an IP address", "[resolver]") {
sim_config cfg;
simulation sim(cfg);
chrono::high_resolution_clock::time_point start = chrono::high_resolution_clock::now();
num_lookups = 0;
asio::io_context ios(sim, make_address_v4("40.30.20.10"));
asio::ip::tcp::resolver resolver(ios);
resolver.async_resolve("10.10.10.10", "8080"
, [](boost::system::error_code const& ec, asio::ip::tcp::resolver::results_type ips)
{
++num_lookups;
std::vector<address_v4> expect = { make_address_v4("10.10.10.10") };
auto expect_it = expect.begin();
for (auto const& ip : ips)
{
assert(ip.endpoint().address() == *expect_it);
assert(ip.endpoint().port() == 8080);
++expect_it;
}
assert(expect_it == expect.end());
});
sim.run();
int millis = int(duration_cast<milliseconds>(chrono::high_resolution_clock::now() - start).count());
CHECK(millis == 0);
CHECK(num_lookups == 1);
}
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