使用asio创建简单udp服务demo_asio demo-优快云博客

本文链接：https://blog.youkuaiyun.com/wangzhicheng1983/article/details/94630915

本文介绍了一个使用Boost.ASIO库实现的UDP客户端与服务器的C++程序。服务器监听本地地址127.0.0.1的9001端口，接收并回显客户端消息。客户端通过输入字符串向服务器发送请求，并接收服务器响应。代码展示了如何使用Boost.ASIO进行网络编程。

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1.server.cpp

#include <iostream>
#include <string>
#include "boost/asio.hpp"
using namespace std;
using namespace boost::asio;
static const size_t BUF_SIZE = 1024;
int main() {
	io_service ios;
	ip::udp::socket udp_server(ios);
	ip::udp::endpoint local_addr(ip::address::from_string("127.0.0.1"), 9001);
	udp_server.open(local_addr.protocol());
	udp_server.bind(local_addr);
	char buf[BUF_SIZE] = "";
	ip::udp::endpoint send_point;
	int recv_len = 0;
	while (true) {
		recv_len = udp_server.receive_from(buffer(buf, BUF_SIZE), send_point);
		cout << "server recv size = " << recv_len << endl;
		cout << "server recv message = " << buf << endl;
		cout << "server send back size = " << udp_server.send_to(buffer(buf, recv_len), send_point) << endl;
	}

	return 0;
}

2.client.cpp

#include <iostream>
#include "boost/asio.hpp"
using namespace std;
using namespace boost::asio;
static const size_t BUF_SIZE = 1024;
int main() {
	io_service ios;
	ip::udp::socket sock(ios);
	ip::udp::endpoint end_point(ip::address::from_string("127.0.0.1"), 9001);
	sock.open(end_point.protocol());
	char buf[BUF_SIZE] = "";
	string str;
	while (true) {
		cout << "input str = ";
		cin >> str;
		try {
			cout << "client send size = " << sock.send_to(buffer(str.c_str(), str.size()), end_point) << endl;
			cout << "client recv size = " << sock.receive_from(buffer(buf, BUF_SIZE), end_point) << endl;
			cout << "client recv message = " << buf << endl;
		}
		catch (boost::system::system_error &e) {
			cerr << e.what() << endl;
		}
	}


	return 0;
}

3.make.sh

g++ -std=c++17 -g -o ServerTest server.cpp -I /opt/boost_1_69_0 -pthread
g++ -std=c++17 -g -o ClientTest client.cpp -I /opt/boost_1_69_0 -pthread

参考：https://blog.youkuaiyun.com/caoshangpa/article/details/79399796