Google Talk File Transfers

[Peter Saint-Andre]

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On 6/17/13 3:42 AM, Phil Hannent wrote:
> Hi Ashish,
> 
> I noticed that you are going to look at the Google Talk File
> Transfers. I was looking at the Jingle ICE communications a couple
> of months ago. I thought I should let you know what I found out
> before I moved on.
> 
> There is the standards based Jingle way of doing things which
> Pidgin implements: http://xmpp.org/extensions/xep-0176.html

That spec was deferred for lack of activity (and the fault is mine
because I'm the author). If you have any implementation feedback,
please send it along!

> Then there is how GTalk actually implements its own Jingle session 
> initiation: https://developers.google.com/talk/call_signaling
> 
> Where I got to is that the <transport> element with the standards 
> method, sends the transport candidates at the initiation and then
> Pidgin automatically expects them to be returned in :
> 
> http://hg.pidgin.im/pidgin/main/file/00e6d5d4c37f/libpurple/protocols/jabber/jingle/jingle.c
>
> 
http://hg.pidgin.im/pidgin/main/file/00e6d5d4c37f/libpurple/protocols/jabber/jingle/transport.c
> 
> However with the Google method they will arrive later. Whilst I
> was looking at it for initiating a video conversation from my Phone
> to Pidgin I assume that P2P file transfers also happen over ICE.

Do you mean that Google uses ICE-TCP to signal the IP/port
combinations for file transfer? I really doubt that they chunk the
file itself over ICE, but you never know. ;-)

Peter

- -- 
Peter Saint-Andre
https://stpeter.im/


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