1 files changed, 80 insertions, 0 deletions
diff --git a/src/seastar/demos/udp_server_demo.cc b/src/seastar/demos/udp_server_demo.cc
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+++ b/src/seastar/demos/udp_server_demo.cc
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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";
+        });
+    });
+}