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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2014 Cloudius Systems, Ltd.
*/
#include <iostream>
#include <seastar/core/distributed.hh>
#include <seastar/core/app-template.hh>
#include <seastar/core/future-util.hh>
using namespace seastar;
using namespace net;
using namespace std::chrono_literals;
class udp_server {
private:
udp_channel _chan;
timer<> _stats_timer;
uint64_t _n_sent {};
public:
void start(uint16_t port) {
ipv4_addr listen_addr{port};
_chan = engine().net().make_udp_channel(listen_addr);
_stats_timer.set_callback([this] {
std::cout << "Out: " << _n_sent << " pps" << std::endl;
_n_sent = 0;
});
_stats_timer.arm_periodic(1s);
keep_doing([this] {
return _chan.receive().then([this] (udp_datagram dgram) {
return _chan.send(dgram.get_src(), std::move(dgram.get_data())).then([this] {
_n_sent++;
});
});
});
}
// FIXME: we should properly tear down the service here.
future<> stop() {
return make_ready_future<>();
}
};
namespace bpo = boost::program_options;
int main(int ac, char ** av) {
app_template app;
app.add_options()
("port", bpo::value<uint16_t>()->default_value(10000), "UDP server port") ;
return app.run_deprecated(ac, av, [&] {
auto&& config = app.configuration();
uint16_t port = config["port"].as<uint16_t>();
auto server = new distributed<udp_server>;
server->start().then([server = std::move(server), port] () mutable {
engine().at_exit([server] {
return server->stop();
});
server->invoke_on_all(&udp_server::start, port);
}).then([port] {
std::cout << "Seastar UDP server listening on port " << port << " ...\n";
});
});
}
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