ip::address::from_string() not working

ip::address's from_string() function does not seem to be working; it
gives me 0.0.0.0 whatever string I pass.

A very minimal reproducible example below, it outputs:
  Set host to 0.0.0.0

I'm using boost 1.40 (ubuntu 10.04). Google is strangely quiet; so I
guess I'm doing something wrong??

Darren

//Compile and run with "g++ test.cpp -lboost_system;./a.out"

#include <iostream>
#include <boost/asio.hpp>

int main(int argc, char* argv[])
{
    boost::asio::ip::address host;
    host.from_string("127.0.0.1");
    std::cout<<"Set host to "<<host<<"\n";
    return 0;
}

--

-- 
Darren Cook, Software Researcher/Developer

http://dcook.org/work/ (About me and my work)
http://dcook.org/blogs.html (My blogs and articles)

SSL ip address

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Working in boost 1.47.0, broken in 1.48?

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Using asio along with libcurl in windows

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Multicast multiple interfaces

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When to post completion handlers?

We've been using ASIO for some time now and an interesting 
problem just appeared. While stress testing with 1000 clients 
we encountered a stack overflow situation.

The root cause of the problem is many completion handlers 
being called directly, resulting in many asynchronous processors 
being invoked and pushed onto the stack. We can address this 
particular bug by selecting a few of our completion handlers and 
posting them to the IO service rather than calling them directly, 
but how do I generally address the problem?

One suggestion is that we simply always post completion handers 
to the IO service rather than calling them directly. This seems a 
little heavy handed, but is guaranteed to work.

Has anyone formulated guidelines to avoid stack overflow of your 
asynchronous processors*? 

When do you do this: 
  ioService.post(bind_handler(completionHandler, error));

Rather than this:    
  completionHandler(error);

* When I say "asynchronous processors" I am referring to function 
objects that are passed as completion handlers to async methods. 
These objects are used to serialize multiple async calls. We are 
using the Chris's coroutine stuff to compose higher level async 
methods from lower level methods.

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deadline_timer and handler lifetimes

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async_read_some() with null_buffers affects non_blocking state

Hello,

I am integrating a third party library into an ASIO event loop.  I've 
wrapped the file descriptor with a posix::stream_descriptor() and made 
async_read_some(null_buffer(), ...) calls.  I am receiving these events 
fine.

The problem is that ASIO appears to be changing the fd to non-blocking 
mode (using ioctl(FIONBIO)).  This is not compatible with the third 
party library.  This library uses the MSG_DONTWAIT flag to the recv() 
system call to ensure it never blocks, and it performs blocking write() 
calls in a worker thread.  It is those writes that are now failing (with 
EAGAIN), which the library is not prepared for.

I am not sure it makes sense for ASIO to modify descriptor attributes 
when it just being used as an alternative select() (specifically, when 
making an async_read_some() call with null_buffers).  As far as I know, 
epoll/select use does not require the non-blocking setting.

I see this occurring with Boost 1.46.1 on Fedora 14, kernel 2.6.35.  I 
don't notice any changes in the relevant code for the latest release, 
1.48.0.  Is this a bug?  If so, should I wait for it to be fixed, or is 
there already a work-around that is consistent with ASIO's design 
philosophy and would be expected to be stable.

Thank you,
Joe

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running code before ssl initialization

Hi,

boost::asio::ssl::detail::openssl_init<true>::do_init initializes the
SSL library using the static initialization hook, thereby preventing
code being ran from main() which must be run before SSL initalization
(for example custom allocators being set using
CRYPTO_set_mem_functions). Is there an intended way to do so when
using boost::asio::ssl?

Best regards,

Isidor

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Help for debugging or asio.

Hello, I created an http proxy, but I have a problem.
I'm testing, and after some time, the traffic back to zero and then go
up, and returns to zero, etc.

I would like some help to get some information out what the problem.

The proxy uses io_service by a thread, but removed all the threads and
used only a io_service and the problem continued.

--

-- 
osmano807
Joaquim Pedro

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asio and async SSL stream: how to detect end of data/connection close?

Hello,

I'm trying to make asio and SSL friends.
Everything going well, but one thing is causing inconvenience: how to
detect if peer close connection, and distinguish it from situation
when peer just take a short break in sending data, aming to continue
it few seconds later?

boost 1.48
OpenSSL 1.0.0e
Compiled to 32-bit code using VS10
Working on W7 x64.

My confusion comes from the fact, that asio behaviour is different for
ordinary socjket and SSL-stream.
If I use tcp::socket - I receive EOF error when peer close connection.
But for boost::asio::ssl::stream<boost::asio::ip::tcp::socket> - it is
not hte case. Instead, async_read_some returns 0 as bytes transfered,
and if I try to continue to read from SSL stream - returns short_error
( http://www.boost.org/doc/libs/1_47_0/doc/h...re/streams.html ).

So, the questions is: is it expected behaviour, or I misconfigure anything?

Client code  snippet:
    class client
    {
    public:

         // bla-bla-bla-bla-bla ....
         //
        void handle_write(const boost::system::error_code& error)
        {
            if (!error)
            {
                socket_.async_read_some(boost::asio::buffer(reply_, max_length),
                    boost::bind(&client::handle_read, this,
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));
            }
            else
            {
                std::cout << "Write failed: " << error.message() << "\n";
            }
        }

        void handle_read(const boost::system::error_code& error,
                        size_t bytes_transferred)
        {

            std::cout << "Bytes transfered: " << bytes_transferred << "\n";
            if (!error)
            {
                std::cout << "Reply: ";
                std::cout.write(reply_, bytes_transferred);
                std::cout << "\n";

                std::cout << "Reading...\n";
                socket_.async_read_some(boost::asio::buffer(reply_, max_length),
                    boost::bind(&client::handle_read, this,
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));
            }
            else if (0 != bytes_transferred)
            {
                std::cout << "Read failed: " << error.message() << ":"
<< error.value() << "\n";
            }
        }

    private:
        boost::asio::ssl::stream<boost::asio::ip::tcp::socket> socket_;
        boost::asio::streambuf request_;
        char reply_[max_length];
    };

If we remove if (0 != bytes_transferred), we'll get "short read" :(.

If we'll use code as-ai, output will be something like this:

=====================
Request is:
GET / HTTP/1.0
Cookie: Nama-nama=Vala-vala

Bytes transfered: 1024

Reply: HTTP/1.0 200 ok
Content-type: text/html

<HTML><BODY BGCOLOR="#ffffff">
..... bla-bla-bla ....

Reading...
Bytes transfered: 1024

..... bla-bla-bla ....
..... bla-bla-bla ....
Reading...
Bytes transfered: 482

..... bla-bla-bla ....
</BODY></HTML>

Reading...
Bytes transfered: 0
=====================

At the same time, if instead async_read_some  we write code, what for
ordinary socket will return EOF:
              boost::asio::async_read(socket_, response_,
                  boost::asio::transfer_at_least(1),
                  boost::bind(&client::handle_read_content, this,
                  boost::asio::placeholders::error));

then for SSL-socket we'll get 0 as bytes transfered, and then short_read.

I know that there is not way to detect disconnect in case if peer, for
example, was just unplugged from the network.
But how to detect explicit clean peer disconnect from situation when
peer just do not send data for a some time, but may be will do it
little bit later?

Or, may be I do not understant something?

WBR,
Andrey

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