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2014-09-24Update documentation after API changesAlexandre Erwin Ittner
Commit ba6ae15a739257200b04a10b6ecd22fe210951e1 introduced some API changes, update the documentation to reflect them.
2014-09-21Remove chattiness from avatar data transfersAlexandre Erwin Ittner
The chatty approach for the avatar data transfer was intended as a security feature to add explicit delays to the transfer and prevent amplification attacks among authenticated friends. This was deemed unnecessary in the code review and, therefore, replaced by a simpler approach that sends all data in a single burst.
2014-09-21Remove support for avatar image formats other than PNGAlexandre Erwin Ittner
Support for other formats was deemed unnecessary in the code review and therefore removed. The value for the constant TOX_AVATARFORMAT_PNG is now set in stone; if the other formats become needed again in the future, this commit shall be reverted and the enum values reordered to keep compatibility.
2014-08-30Add support for user avatars in the core protocolAlexandre Erwin Ittner
Add a protocol and the APIs to straightforwardly support user avatars in client applications. The protocol is designed to transfer avatars in background, between friends only, and minimize network load by providing a lightweight avatar notification for local cache validation. Strict safeguards are imposed to avoid damage from non-cooperative or malicious users and to limit network usage. The complete documentation is available in docs/Avatars.md and sample code is available in testing/test_avatars.c. Code and documentation are released under the GNU GPLv3 or later, as described in the file COPYING.