Yahoo! Protocol: Part 9 - Instant Messages

[tansqrx 0]

An IM is the simplest service offered in Yahoo! and will be used as an example. This conversation will take place between Yuser1 and Yuser2 and is seen from the point of view of Yuser1. Yuser1 sends a single packet as shown in Figure 24. The packet contains the sender, recipient, message, and other system information. Due to the fact that the packet is proxied through the Yahoo! servers, Yuser2 actually sees a different packet than the one sent by Yuser1. The packet fields are reordered and the 5 field is changed to show who the current sender is. Figure 25 shows a received packet from Yuser2. Both packets are from the point of view of Yuser1.

 

Figure 24 - IM Sent

 

Figure 25 - IM Received

 

http://www.ycoderscookbook.com/

Edited February 6, 2009 by tansqrx (see edit history)