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96 lines
3.5 KiB
C++
96 lines
3.5 KiB
C++
// undgramechosvr.cpp
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//
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// A simple multi-threaded TCP/IP UDP echo server for sockpp library.
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//
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// This runs a UDP echo server for both IPv4 and IPv6, each in a separate
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// thread. They both use the same port number, either as provided by the user
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// on the command line, or defaulting to TEST_PORT.
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//
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// USAGE:
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// undgramechosvr [port]
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//
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// You can test with a netcat client, like:
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// $ nc -u localhost 12345 # IPv4
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// $ nc -6u localhost 12345 # IPv6
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//
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// --------------------------------------------------------------------------
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// This file is part of the "sockpp" C++ socket library.
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//
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// Copyright (c) 2019 Frank Pagliughi
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// --------------------------------------------------------------------------
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#include <iostream>
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#include "sockpp/unix_dgram_socket.h"
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#include "sockpp/version.h"
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using namespace std;
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const string UNSOCK_FILE{"/tmp/undgramechosvr.sock"};
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// --------------------------------------------------------------------------
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// The main thread creates the UDP socket, and then starts them running the
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// echo service in a loop.
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int main(int argc, char* argv[]) {
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cout << "Sample Unix-domain datagram echo server for 'sockpp' " << sockpp::SOCKPP_VERSION
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<< '\n'
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<< endl;
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sockpp::initialize();
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sockpp::unix_dgram_socket sock;
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if (auto res = sock.bind(sockpp::unix_address(UNSOCK_FILE)); !res) {
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cerr << "Error binding the socket: " << res.error_message() << endl;
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return 1;
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}
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// Run the socket in this thread.
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char buf[512];
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sockpp::unix_address srcAddr;
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cout << "Awaiting packets on: '" << sock.address() << "'" << endl;
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// Read some data, also getting the address of the sender,
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// then just send it back.
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while (true) {
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if (auto res = sock.recv_from(buf, sizeof(buf), &srcAddr); !res || res.value() == 0) {
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cerr << "Error receiving data: " << res.error_message() << endl;
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return 1;
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}
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else {
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sock.send_to(buf, res.value(), srcAddr);
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}
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}
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return 0;
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}
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