[libnice] Reliable communication hanging?

[Youness Alaoui]

No problem, glad you figured it out and there was no bug!


On Wed, Jun 11, 2014 at 9:29 AM, Francesco Massei <fmassei at gmail.com> wrote:

> Hi,
>
> I ashamedly have to inform that after two days and one night of work
> writing snippets and tests I found the problem, it was mine. I was
> bitten by an implicit integer conversion like a noob (actually, even
> worse, by not paying enough attention writing the building scripts).
> From time to time there was a send() called without waiting the
> signal, and bad things were happening.
> Now everything seems to work fine.
>
> Thank you again for your patience, and sorry for wasting everyone's time..
> Francesco
>
> On Wed, Jun 11, 2014 at 6:32 AM, Youness Alaoui
> <kakaroto at kakaroto.homelinux.net> wrote:
> >
> > Hi,
> >
> > The first thing I notice is that you say you send data on
> transport_writable
> > signal. I hoep you know/understand that transport_writable will only be
> > signaled IF you do a send which returns less than the number of bytes you
> > wanted to send.. So if for example you want to send 1000 bytes, and the
> > nice_agent_send returned 1000, then transport_writable will not be
> signaled.
> > Either way, it doesn't seem to be your problem since you say you used a
> > packet sniffer and all the packets got sent.
> > Which version of libnice are you using? I think it would be important to
> > know. I believe there was an email recently on the mailing list about the
> > recv() function only returning when the entire recv buffer is filled,
> > instead of returning whatever data is available. I'm not sure, but this
> > could be related. I think Olivier might be able to help, but knowing the
> > version of libnice you are using will be required before he can determine
> > the cause.
> > If you have a way to reproduce the problem, that would be helpful too.
> >
> > Thanks,
> > Youness.
> >
> >
> >
> > On Tue, Jun 10, 2014 at 11:51 AM, Francesco Massei <fmassei at gmail.com>
> > wrote:
> >>
> >> Hello,
> >>
> >> I'm facing a strange issue with libnice that maybe you can help me
> solve.
> >>
> >> I have two peers that, using a reliable agent
> >> (nice_agent_new_reliable()), communicate between themselves. The first
> >> (let's call him "A") sends some data using nice_agent_send() on each
> >> transport_writable signal, the second (let's call him "B") receives
> >> the data in the callback set with nice_agent_attach_recv().
> >> "A" always manages to send all the data, while "B", for some reason,
> >> receives only part of it: sometimes just the initial frames, sometimes
> >> nearly all of them, but it never manages to get them all.
> >> Right now I'm making tests running both A and B on the same machine,
> >> with a packet sniffer open, and:
> >> - "A" and "B" are both up and running, as I see they keep sending STUN
> >> messages to each other every now and then.
> >> - All the packets "A" sends are on the wire
> >> - If I try to send much more data from "A" (like streaming endlessly
> >> gibberish) eventually "B" will get everything
> >> - Waiting for a long time (even minutes) doesn't help
> >>
> >> The only hypothesis I can advance is that, for some reason, B waits
> >> some kind of ACK or SYN that will never arrive as long as A is not
> >> sending anything.
> >>
> >> Any idea on why is this happening and how could I solve it?
> >>
> >> Thank you very much!
> >> Francesco
> >> _______________________________________________
> >> nice mailing list
> >> nice at lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/nice
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/nice/attachments/20140612/2980ea0c/attachment.html>