下面是我使用 boost asio 的套接字服务器的示例代码。
此服务器将在端口 10001 上等待任何客户端连接。当任何客户端连接时，它将启动线程从该客户端读取并等待另一个客户端。但是当我的客户端断开服务器套接字挂起时会发生什么my_socket->close()。
如果新客户端尝试连接服务器崩溃。
我正在使用 g++ (Ubuntu 4.4.3-4ubuntu5.1) 4.4.3
#include <ctime>
#include <iostream>
#include <string>
#include <boost/asio.hpp>
#include <sys/socket.h>
#include <unistd.h>
#include <string>
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <boost/date_time.hpp>
using namespace std;
using boost::asio::ip::tcp;
void run(boost::shared_ptr<tcp::socket> my_socket)
{
while (1)
{
char buf[128];
boost::system::error_code error;
size_t len = my_socket->read_some(boost::asio::buffer(buf, 128), error);
std::cout << "len : " << len << std::endl;
if (error == boost::asio::error::eof)
{
cout << "\t(boost::asio::error::eof)" << endl;
if (my_socket->is_open())
{
boost::system::error_code ec;
cout << "\tSocket closing" << endl;
my_socket->shutdown(boost::asio::ip::tcp::socket::shutdown_both, ec);
cout << "\tShutdown " << ec.message() << endl;
// cout << "normal close : " << ::close(my_socket->native_handle()) << endl;
my_socket->close(ec);
cout << "\tSocket closed" << endl;
}
break; // Connection closed cleanly by peer.
}
else if (error)
{
std::cout << "Exception : " << error.message() << std::endl;
break;
}
else
{
for (unsigned int i = 0; i < len; i++)
printf("%02x ", buf[i] & 0xFF);
printf("\n");
}
}
}
int main()
{
const int S = 1000;
vector<boost::shared_ptr<boost::thread> > arr_thr(S);
try
{
for (uint32_t i = 0;; i++)
{
boost::asio::io_service io_service;
tcp::endpoint endpoint(tcp::v6(), 10001);
boost::shared_ptr<tcp::socket> my_socket(new tcp::socket(io_service));
tcp::endpoint end_type;
tcp::acceptor acceptor(io_service, endpoint);
std::cout << "before accept" << endl;
acceptor.accept(*my_socket, end_type);
std::cout << "connected... hdl : " << my_socket->native_handle() << std::endl;
boost::asio::ip::address addr = end_type.address();
std::string sClientIp = addr.to_string();
std::cout << "\tclient IP : " << sClientIp << std::endl;
arr_thr[i] = boost::shared_ptr<boost::thread>(new boost::thread(&run, my_socket));
}
} catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
}
return 0;
}