Re: [Boost-users] boost::asio::ip::tcp::resolver::query does not work in Ubuntu!!!

Subject: Re: [Boost-users] boost::asio::ip::tcp::resolver::query does not work in Ubuntu!!!
From: mozdemir (mozdemir76_at_[hidden])
Date: 2012-05-12 13:27:16

HI Andreas,

you are right. this is not crash. It is an exception. 

I did the following small code to explain the issue better

============================================

#include <iostream> 
#include <boost/asio/ip/tcp.hpp>
#include <boost/lexical_cast.hpp>
 

using namespace boost::asio; 

int main(int argc, char* argv[]) 
{ 
        io_service ios; 
        try { 
            int i;
            for (i=0;i<1000;i++) {
                int m_port = 80;
                std::string m_host = "www.yahoo.com";
                boost::system::error_code ec;
                boost::asio::ip::tcp::resolver resolver( ios );
                boost::asio::ip::tcp::resolver::query query( m_host,
boost::lexical_cast< std::string >( m_port ));

                boost::asio::ip::tcp::resolver::iterator endpointIterator =
resolver.resolve( query );
                for(;endpointIterator != ip::tcp::resolver_iterator();
++endpointIterator) { 
                    std::cout << "i: " << i << " ip: " <<
endpointIterator->endpoint().address().to_string() << std::endl; 
                } 
            }
 
        } catch(std::exception const& ex) { 
                std::cerr << "Error: " << ex.what() << '\n'; 
        } 
} 
=============================================

the output goes fine but around 300, it throws the exception.

i: 327 ip: 98.139.183.24
i: 328 ip: 98.139.183.24
i: 329 ip: 98.139.183.24

Error: Host not found (authoritative)

============================================

you are suggesting to handle the exception which I will do. But i wonder why
this is not happening in windows but ubuntu?

I wonder if my ubuntu is missing some configuration. I did install Miredo
for Ipv6 but it did not help.
i feel like this is something to do with network settings issue, NAT issue
or something....

Thank you for the suggestion.
mustafa

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