Re: [Boost-users] [asio] Howto bind *client* to a specific port?

Subject: Re: [Boost-users] [asio] Howto bind *client* to a specific port?
From: for-gmane (for-gmane_at_[hidden])
Date: 2010-10-02 08:15:01

On 2010-10-01 22:51, for-gmane wrote:
> On 2010-10-01 17:03, for-gmane wrote:
>> A NewbieQ:
>>
>> From a client app I want to connect to a server app on a remote host
>> (say port 6666).
>> A requirement is that the client shall be bound to a defined port (say
>> port 5555).
>> How to do this in asio?
>> Does the client need to use an acceptor? (ok, this maybe sounds
>> non-sensical, but who knows... :-)
>
> Solved as follows:
> ...
> tcp::socket s(io_service);
> s.open(tcp::v4());
> s.set_option(tcp::socket::reuse_address(true));
> s.bind(tcp::endpoint(tcp::v4(), uLocalPortToUse));
> s.connect(*iterator);
> ...

Just a followup question:

I tried to replace the above s.bind(...) with this one:
   s.bind(tcp::endpoint(boost::asio::ip::address::from_string("127.0.0.1"), uLocalPortToUse));
but then, the s.connect(...) call to internet hosts fails.
Is this behaviour correct?  
(Ie. connecting from 127.0.0.1 seems not possible to non-local adresses; OTOH this make sense, isn't it?)