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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 2014 Cloudius Systems
*/
#include <seastar/core/reactor.hh>
#include <seastar/core/app-template.hh>
#include <seastar/core/temporary_buffer.hh>
#include <seastar/core/distributed.hh>
#include <seastar/core/print.hh>
#include <vector>
#include <iostream>
using namespace seastar;
static std::string str_ping{"ping"};
static std::string str_txtx{"txtx"};
static std::string str_rxrx{"rxrx"};
static std::string str_pong{"pong"};
static std::string str_unknow{"unknow cmd"};
static int tx_msg_total_size = 100 * 1024 * 1024;
static int tx_msg_size = 4 * 1024;
static int tx_msg_nr = tx_msg_total_size / tx_msg_size;
static int rx_msg_size = 4 * 1024;
static std::string str_txbuf(tx_msg_size, 'X');
static bool enable_tcp = false;
static bool enable_sctp = false;
class tcp_server {
std::vector<server_socket> _tcp_listeners;
std::vector<server_socket> _sctp_listeners;
public:
future<> listen(ipv4_addr addr) {
if (enable_tcp) {
listen_options lo;
lo.proto = transport::TCP;
lo.reuse_address = true;
_tcp_listeners.push_back(seastar::listen(make_ipv4_address(addr), lo));
do_accepts(_tcp_listeners);
}
if (enable_sctp) {
listen_options lo;
lo.proto = transport::SCTP;
lo.reuse_address = true;
_sctp_listeners.push_back(seastar::listen(make_ipv4_address(addr), lo));
do_accepts(_sctp_listeners);
}
return make_ready_future<>();
}
// FIXME: We should properly tear down the service here.
future<> stop() {
return make_ready_future<>();
}
void do_accepts(std::vector<server_socket>& listeners) {
int which = listeners.size() - 1;
// Accept in the background.
(void)listeners[which].accept().then([this, &listeners] (accept_result ar) mutable {
connected_socket fd = std::move(ar.connection);
socket_address addr = std::move(ar.remote_address);
auto conn = new connection(*this, std::move(fd), addr);
(void)conn->process().then_wrapped([conn] (auto&& f) {
delete conn;
try {
f.get();
} catch (std::exception& ex) {
std::cout << "request error " << ex.what() << "\n";
}
});
do_accepts(listeners);
}).then_wrapped([] (auto&& f) {
try {
f.get();
} catch (std::exception& ex) {
std::cout << "accept failed: " << ex.what() << "\n";
}
});
}
class connection {
connected_socket _fd;
input_stream<char> _read_buf;
output_stream<char> _write_buf;
public:
connection(tcp_server& server, connected_socket&& fd, socket_address addr)
: _fd(std::move(fd))
, _read_buf(_fd.input())
, _write_buf(_fd.output()) {}
future<> process() {
return read();
}
future<> read() {
if (_read_buf.eof()) {
return make_ready_future();
}
// Expect 4 bytes cmd from client
size_t n = 4;
return _read_buf.read_exactly(n).then([this] (temporary_buffer<char> buf) {
if (buf.size() == 0) {
return make_ready_future();
}
auto cmd = std::string(buf.get(), buf.size());
// pingpong test
if (cmd == str_ping) {
return _write_buf.write(str_pong).then([this] {
return _write_buf.flush();
}).then([this] {
return this->read();
});
// server tx test
} else if (cmd == str_txtx) {
return tx_test();
// server tx test
} else if (cmd == str_rxrx) {
return rx_test();
// unknow test
} else {
return _write_buf.write(str_unknow).then([this] {
return _write_buf.flush();
}).then([] {
return make_ready_future();
});
}
});
}
future<> do_write(int end) {
if (end == 0) {
return make_ready_future<>();
}
return _write_buf.write(str_txbuf).then([this] {
return _write_buf.flush();
}).then([this, end] {
return do_write(end - 1);
});
}
future<> tx_test() {
return do_write(tx_msg_nr).then([this] {
return _write_buf.close();
}).then([] {
return make_ready_future<>();
});
}
future<> do_read() {
return _read_buf.read_exactly(rx_msg_size).then([this] (temporary_buffer<char> buf) {
if (buf.size() == 0) {
return make_ready_future();
} else {
return do_read();
}
});
}
future<> rx_test() {
return do_read().then([] {
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), "TCP server port")
("tcp", bpo::value<std::string>()->default_value("yes"), "tcp listen")
("sctp", bpo::value<std::string>()->default_value("no"), "sctp listen") ;
return app.run_deprecated(ac, av, [&] {
auto&& config = app.configuration();
uint16_t port = config["port"].as<uint16_t>();
enable_tcp = config["tcp"].as<std::string>() == "yes";
enable_sctp = config["sctp"].as<std::string>() == "yes";
if (!enable_tcp && !enable_sctp) {
fprint(std::cerr, "Error: no protocols enabled. Use \"--tcp yes\" and/or \"--sctp yes\" to enable\n");
return engine().exit(1);
}
auto server = new distributed<tcp_server>;
(void)server->start().then([server = std::move(server), port] () mutable {
engine().at_exit([server] {
return server->stop();
});
// Start listening in the background.
(void)server->invoke_on_all(&tcp_server::listen, ipv4_addr{port});
}).then([port] {
std::cout << "Seastar TCP server listening on port " << port << " ...\n";
});
});
}
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