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Subject: Re: [boost] Udp Socket
From: Shane Baker (sbaker_at_[hidden])
Date: 2014-02-03 11:41:58

I cannot comment on your program termination error.

Regarding UDP being a connectionless protocol, errors may still be returned
if the destination host is not reachable. These errors are returned via
ICMP. You can see this with Wireshark or a similar tool.

I suspect that you are calling async_connect() or connect() on your socket
and then using async_send() or send(). I haven't been using Boost for some
time now, but in my experience on other platforms, you might get the
behavior you want by using async_send_to() and send_to() instead. The
behavior in terms of receiving the ICMP errors is different when you use
the socket this way.

On Sun, Feb 2, 2014 at 11:49 PM, •°o.O sαмι O.o°• <sami.haq99_at_[hidden]>wrote:

> Asalam-o-Aliakum and Hi all,
> I am having a problem with boost udp socket.
> My program terminates after throwing exception "host unreachable".
> My questions:
> 1). why udp socket cares for host it should just send data out of its own
> port and its job is done? 2). And how it knows that host is not available
> if udp is connection less protocol?
> 3). And another simple question how to avoid program termination on this
> exception?
> Best Regards;
> Sami Ul Haq
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