C++ 在给定远程终端对象和套接字的情况下向客户端发送数据包?
有没有一种方法可以将数据包发送给知道使用了C++ 在给定远程终端对象和套接字的情况下向客户端发送数据包?,c++,boost-asio,send,packet,C++,Boost Asio,Send,Packet,有没有一种方法可以将数据包发送给知道使用了endpoint.address和endpoint.port的对象的客户端 EDIT:我添加了async\u write免费功能,但我仍然不知道如何指定套接字的ip地址或端口,以便将数据发送到(客户端)。这些更改是boostasync服务器示例的第44-49行 #include <cstdlib> #include <iostream> #include <boost/bind.hpp> #include <bo
endpoint.address
和endpoint.port
的对象的客户端
EDIT:我添加了async\u write
免费功能,但我仍然不知道如何指定套接字的ip地址或端口,以便将数据发送到(客户端)。这些更改是boostasync服务器示例的第44-49行
#include <cstdlib>
#include <iostream>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
using boost::asio::ip::tcp;
class session
{
public:
session(boost::asio::io_service& io_service)
: socket_(io_service)
{
}
tcp::socket& socket()
{
return socket_;
}
void start()
{
std::cout<<"start(): "<<std::endl;
socket_.async_read_some(boost::asio::buffer(data_, max_length),
boost::bind(&session::handle_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void read_handler(const boost::system::error_code& ec, std::size_t bytes_transferred);
private:
void handle_read(const boost::system::error_code& error,
size_t bytes_transferred)
{
std::cout<<"handle read: bytes_transferred"<<bytes_transferred<<std::endl;
if (!error)
{
data_ = {'0','1','2','3','4','5','6','7','8','9'};
/*read_handler(error, bytes_transferred);
boost::asio::async_write(socket_,boost::asio::buffer(data_, bytes_transferred),
boost::bind(&session::handle_write, this,
boost::asio::placeholders::error));*/
boost::system::error_code ec;
boost::asio::ip::tcp::endpoint endpoint = socket_.remote_endpoint(ec);
std::cout<<"ip address: "<<endpoint.address()<<std::endl;
std::cout<<"port: "<<endpoint.port()<<std::endl;
//how to get the socket to send data to specific port, ip-address e.g. changing the ip-address and port by editing it?
async_write(socket_, boost::asio::buffer(data_, max_length), boost::bind(&session::writeHandler, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
else
{
delete this;
}
}
void writeHandler(const boost::system::error_code& errorCode, size_t bytesTransferred)
{
std::cout << "DEBUG> Transfered " << bytesTransferred << " bytes to " << socket_.remote_endpoint().address().to_string() << std::endl;
}
void handle_write(const boost::system::error_code& error)
{
std::cout<<"handle write: "<<std::endl;
if (!error)
{
std::cout<<"before: "<<data_<<std::endl;
socket_.async_read_some(boost::asio::buffer(data_, max_length),
boost::bind(&session::handle_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
std::cout<<"after: "<<data_<<std::endl;
}
else
{
delete this;
}
}
tcp::socket socket_;
enum { max_length = 1024 };
char data_[max_length];
};
void session::read_handler(const boost::system::error_code& ec, std::size_t bytes_transferred)
{
std::cout<<bytes_transferred<<std::endl;
}
class server
{
public:
server(boost::asio::io_service& io_service, short port)
: io_service_(io_service),
acceptor_(io_service, tcp::endpoint(tcp::v4(), port))
{
start_accept();
}
private:
void start_accept()
{
session* new_session = new session(io_service_);
acceptor_.async_accept(new_session->socket(),
boost::bind(&server::handle_accept, this, new_session,
boost::asio::placeholders::error));
}
void handle_accept(session* new_session,
const boost::system::error_code& error)
{
if (!error)
{
new_session->start();
}
else
{
delete new_session;
}
start_accept();
}
boost::asio::io_service& io_service_;
tcp::acceptor acceptor_;
};
int main()
{
try
{
boost::asio::io_service io_service;
server s(io_service, 4000);
io_service.run();
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
return 0;
}
#包括
#包括
#包括
#包括
使用boost::asio::ip::tcp;
课堂
{
公众:
会话(boost::asio::io_服务和io_服务)
:socket_(io_服务)
{
}
tcp::套接字和套接字()
{
返回插座;
}
void start()
{
std::cout假设TCP套接字,因为这是您在文档中链接到的,不,这是不可能的。您需要一个套接字对象来发送数据,而不仅仅是一个端点。使用async_write()
free函数,它的许多重载之一,或任何用于发送数据的套接字类方法。好的,我改变了主意,socket
对象可用,但我只能使用write
或send
否?我查看了async\u write
页面,但没有一个参数使用remote\u端点
?这与图中的情况如何?@lost async_write()是一个通用函数,第一个参数可以是满足以下条件的任何类型。通常,这是公开异步写入的任何类型()方法。我看了这个页面,他似乎声明了一个数据包
,但我似乎在任何名称空间下都找不到数据包
,boost::asio::ip::tcp;
?我有点期待他在异步写入
函数中发送的数据包
是boost-asio的一部分。我忘了问,有什么办法改变吗使用socket\uu.remote\u endpoint().address().
的套接字地址?我尝试了socket\uu.remote\u endpoint().address(“127.0.0.1”)
,但编译时运气不佳。我假设端口的编码也会类似。