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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "smtp_server.h"
#include <boost/asio.hpp>
#include <iostream>
#include <string>
using std::string;
using boost::asio::ip::tcp;
void
run_smtp_server(int port, bool fail)
{
boost::asio::io_context context;
tcp::acceptor acceptor(context, tcp::endpoint(tcp::v4(), port));
tcp::socket socket(context);
acceptor.accept(socket);
auto send = [&socket](string message) {
boost::system::error_code error;
boost::asio::write(socket, boost::asio::buffer(message + "\r\n"), boost::asio::transfer_all(), error);
};
auto receive = [&socket]() {
boost::asio::streambuf buffer;
boost::asio::read_until(socket, buffer, "\n");
return string{
std::istreambuf_iterator<char>(&buffer),
std::istreambuf_iterator<char>()
};
};
send("220 smtp.example.com ESMTP Postfix");
/* EHLO */
receive();
send("250-smtp.example.com Hello mate [127.0.0.1]");
send("250-SIZE 14680064");
send("250-PIPELINING");
send("250 HELP");
/* MAIL FROM */
receive();
send("250 Ok");
/* RCPT TO */
if (fail) {
return;
}
receive();
send("250 Ok");
/* DATA */
receive();
send("354 End data with <CR><LF>.<CR><LF>");
/* Email body */
receive();
send("250 Ok");
/* QUIT */
receive();
}
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