2018-05-29 09:25:24 +00:00
|
|
|
//
|
|
|
|
// async_udp_echo_server.cpp
|
|
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
//
|
|
|
|
// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
|
|
|
|
//
|
|
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
//
|
|
|
|
|
|
|
|
#include <cstdlib>
|
|
|
|
#include <iostream>
|
|
|
|
|
|
|
|
#include "asio.hpp"
|
|
|
|
|
2018-11-20 16:44:31 +00:00
|
|
|
#include "protocol_examples_common.h"
|
|
|
|
#include "esp_event.h"
|
|
|
|
#include "tcpip_adapter.h"
|
|
|
|
#include "nvs_flash.h"
|
|
|
|
|
|
|
|
|
2018-05-29 09:25:24 +00:00
|
|
|
using asio::ip::udp;
|
|
|
|
|
|
|
|
class server
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
server(asio::io_context& io_context, short port)
|
|
|
|
: socket_(io_context, udp::endpoint(udp::v4(), port))
|
|
|
|
{
|
|
|
|
do_receive();
|
|
|
|
}
|
|
|
|
|
|
|
|
void do_receive()
|
|
|
|
{
|
|
|
|
socket_.async_receive_from(
|
|
|
|
asio::buffer(data_, max_length), sender_endpoint_,
|
|
|
|
[this](std::error_code ec, std::size_t bytes_recvd)
|
|
|
|
{
|
|
|
|
if (!ec && bytes_recvd > 0)
|
|
|
|
{
|
2018-11-20 16:44:31 +00:00
|
|
|
data_[bytes_recvd] = 0;
|
2018-05-29 09:25:24 +00:00
|
|
|
std::cout << data_ << std::endl;
|
|
|
|
do_send(bytes_recvd);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
do_receive();
|
|
|
|
}
|
|
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|
|
void do_send(std::size_t length)
|
|
|
|
{
|
|
|
|
socket_.async_send_to(
|
|
|
|
asio::buffer(data_, length), sender_endpoint_,
|
|
|
|
[this](std::error_code /*ec*/, std::size_t bytes /*bytes_sent*/)
|
|
|
|
{
|
|
|
|
do_receive();
|
|
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
udp::socket socket_;
|
|
|
|
udp::endpoint sender_endpoint_;
|
|
|
|
enum { max_length = 1024 };
|
|
|
|
char data_[max_length];
|
|
|
|
};
|
|
|
|
|
2019-07-16 09:33:30 +00:00
|
|
|
extern "C" void app_main(void)
|
2018-05-29 09:25:24 +00:00
|
|
|
{
|
2018-11-20 16:44:31 +00:00
|
|
|
ESP_ERROR_CHECK(nvs_flash_init());
|
|
|
|
tcpip_adapter_init();
|
|
|
|
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
|
|
|
|
|
|
|
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
|
|
|
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
|
|
|
* examples/protocols/README.md for more information about this function.
|
|
|
|
*/
|
|
|
|
ESP_ERROR_CHECK(example_connect());
|
|
|
|
|
|
|
|
/* This helper function configures blocking UART I/O */
|
|
|
|
ESP_ERROR_CHECK(example_configure_stdin_stdout());
|
|
|
|
|
2018-05-29 09:25:24 +00:00
|
|
|
asio::io_context io_context;
|
|
|
|
|
|
|
|
server s(io_context, std::atoi(CONFIG_EXAMPLE_PORT));
|
|
|
|
|
|
|
|
io_context.run();
|
|
|
|
}
|