Support large file transfers (>4GiB)

[stickynips]

I'm using Pidgin 2.0 on Windows XP SP2. When transferring a large file, nearly 19GB in this case, pidgin misreports the file size in the transfer window. Although it doesn't hinder the file transfer at all, it's a minor annoyance not knowing how much longer you've got left on your transfer.

At the bottom of the picture you will see the file size that Windows reports, as opposed to the "-2033252893 bytes" that Pidgin reports. It seems to me like an integer overflow error. The computer on the other end of the transfer (running Pidgin as well) experienced the same error.

[rekkanoryo]

AIM uses a 32-bit unsigned integer to indicate the size of a file. This limits the file size to 4GB. I'd be surprised if you're actually able to send a file larger than 4GB over AIM.

Assigning this to MarkDoliner, who might have more insight or information.

[rlaager]

We must be using a signed integer somewhere, if only the format string, to get a negative number in that display.

[MarkDoliner]

We WERE using a signed conversation in the format string. I fixed that. Hopefully that was the only place.

And yes, AIM uses 32-bit unsigned integers to indicate the size of the file. So you DEFINITELY can't transfer a file bigger than 4GB using Pidgin. If you manage to transfer a file bigger than that using two WinAIM clients then please let me know.

[dpadgett]

Replying to MarkDoliner:

And yes, AIM uses 32-bit unsigned integers to indicate the size of the file. So you DEFINITELY can't transfer a file bigger than 4GB using Pidgin. If you manage to transfer a file bigger than that using two WinAIM clients then please let me know.

using aim version 6 i was able to transfer a 5 gb tv recording i made, whereas i couldn't with pidgin due to the misreported size (5 gb mod 4 gb ended up reporting it as 1gb)

[dpadgett]

upon further inspection, i can send a smaller file from aim 6 to pidgin just fine, but upon trying to send one over 4 gb, pidgin refuses to start the download and it fails. protocol change maybe?

[rprots]

I have tried to send 22 GB file (through ICQ). Pidgin says it's 1.88 GB in its file transfer window. And my buddy doesn't even see that I want to send him/her a file. Pidgin crashed(!) when I closed file transfer window.

[Sim-on]

Ticket #6820 has been marked as a duplicate of this ticket.

[madman2k]

using the bonjour protocol, pidgin displayed the right size, but actually only transferred 2GB

[jruere]

Something similar happens to Jabber. From a 3+GB file only 2GB were reported and transferred.

[salinasv]

Can someone confirm it happens on newer versions? IIRC it was fixed few weeks ago.

[darkrain42]

My reading of this ticket is that it's, at this point, dealing with large file support for AIM, which, AFAIK, is still not supported.

#4514 is possibly related