File Transfer Implementation - GSOC Project 2013

Sulabh Mahajan at
Tue Jun 11 09:28:13 EDT 2013

I will suggest you to look at the yahoo prpl tickets that are file transfer
related. You will get a fairly good idea of what doesn't work from there.
At the bare minimum the following should work:

pidgin to pidgin
pidgin to y! msngr
y! msngr to pidgin

Most likely you will NOT need to rewrite the whole thing. Usually the
protocol keeps changing little by little and breaks file transfers every
few months. Not much hacking is required to fix it back.
Said that I haven't looked at the ymsg protocol for quite some time
and don't know exactly what has changed.

You will need to reverse engineer file transfers between yahoo messengers
and see exactly where is our implementation varying from the protocol.

You will need the following:
1. wireshark or any other capable packet sniffer
2. windows machine with yahoo messenger
3. linux with pidgin
4. knowledge on using gdb and valgrind.

Let me know what else you need to start fixing yahoo transfers.
Ping me in case you see me online and need help.

I will take a look today and see if I can list down major things that don't

Sulabh Mahajan

On Sun, Jun 9, 2013 at 2:47 PM, Ashish Gupta <ashmew2 at> wrote:

> Hello Sulabh,
> I have been going through the Yahoo prpl for a bit now,
> Do you have a list of issues as to what does not work in the code? Any
> specific modules I could look at, Or would i need to rewrite the whole
> thing from scratch ? I'm putting in various debug messages in the
> yahoo_filexfer.c right now and trying to understand the program flow.
> Thanks,
> Ashish
> On Wed, May 29, 2013 at 2:17 PM, Ashish Gupta <ashmew2 at> wrote:
>> Hi Sulab,
>> I have made the proposal public now and it can be viewed at the link :
>> I have an exam scheduled on 31st May and i will begin work after that.
>>  I will surely contact you via this thread as soon as i am starting work
>> with the Y! FT.
>> Thanks.
>>  On Wed, May 29, 2013 at 12:09 PM, Sulabh Mahajan < at>wrote:
>>> Hi Ashish,
>>> Congrats for getting accepted for GSoC. I haven't read your proposal
>>> yet, looks like the link accessible to mentors only. I should be able to
>>> help you with the Y! file transfers.
>>> Let me know when you get started and need any kind of help.
>>> Regards,
>>> Sulabh
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