|Transport Layer:||Transmission Control Protocol (TCP)|
|Application Layer:||Battle.net v1 TCP Messages (SID)|
|Direction:||Client to Server|
|Used By:||Starcraft Original, Starcraft Broodwar|
Starcraft Shareware, Starcraft Japanese
Diablo Retail, Diablo Shareware
Diablo II, Diablo II Lord of Destruction
Warcraft II BNE, Warcraft III Reign of Chaos
Warcraft III The Frozen Throne
(does not include protocol header)
Requests ad banner information from Battle.net.
Official clients send this packet every 20 seconds (give or take). You do not have to send this at all.
In addition, Battle.net will not reply unless any of the fields above are updated from the last time you checked. If you have never checked before, Battle.net will always reply back.