48b4c725
 Peter M. Groen
Setting up Socket-pp
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// tcpechomt.cpp
//
// TCP echo client that uses separate read and write threads.
//
// --------------------------------------------------------------------------
// This file is part of the "sockpp" C++ socket library.
//
// Copyright (c) 2014-2017 Frank Pagliughi
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// --------------------------------------------------------------------------
#include <iostream>
#include <string>
#include <thread>
#include "sockpp/tcp_connector.h"
#include "sockpp/version.h"
using namespace std;
// --------------------------------------------------------------------------
// The read thread will run independently, retrieving packets from the
// server and writing them to the console. When the main (write) thread
// shuts down the socket, we exit.
void read_thr(sockpp::tcp_socket rdSock)
{
char buf[512];
ssize_t n;
while ((n = rdSock.read(buf, sizeof(buf))) > 0) {
cout.write(buf, n);
cout << endl;
}
if (n < 0) {
cout << "Read error [" << rdSock.last_error() << "]: "
<< rdSock.last_error_str() << endl;
}
rdSock.shutdown();
}
// --------------------------------------------------------------------------
int main(int argc, char* argv[])
{
cout << "Sample multi-threaded TCP echo client for 'sockpp' "
<< sockpp::SOCKPP_VERSION << '\n' << endl;
string host = (argc > 1) ? argv[1] : "localhost";
in_port_t port = (argc > 2) ? atoi(argv[2]) : 12345;
sockpp::socket_initializer sockInit;
// Implicitly creates an inet_address from {host,port}
// and then tries the connection.
sockpp::tcp_connector conn({host, port});
if (!conn) {
cerr << "Error connecting to server at "
<< sockpp::inet_address(host, port)
<< "\n\t" << conn.last_error_str() << endl;
return 1;
}
cout << "Created a connection from " << conn.address() << endl;
// We create a read thread and send it a clone (dup) of the
// connector socket.
std::thread rdThr(read_thr, std::move(conn.clone()));
// The write loop get user input and writes it to the socket.
string s, sret;
while (getline(cin, s) && !s.empty()) {
if (conn.write(s) != (int) s.length()) {
if (conn.last_error() == EPIPE) {
cerr << "It appears that the socket was closed." << endl;
}
else {
cerr << "Error writing to the TCP stream ["
<< conn.last_error() << "]: "
<< conn.last_error_str() << endl;
}
break;
}
}
int ret = !conn ? 1 : 0;
// Shutting down the socket will cause the read thread to exit.
// We wait for it to exit before we leave the app.
conn.shutdown(SHUT_WR);
rdThr.join();
return ret;
}
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