GameSpy 3

GameSpy query protocol version 3 uses a two request query. The first request is answered with a challenge value, that should be included on the second request. Requests and responses are sent over UDP.

1. Client sends request to server
2. Server replies with a challenge number
3. Client sends new request to server, including challenge from first response
4. Server replies with query information

Resources

1. http://www.forum.ksk-squad.com/database/crysis-wars/tools/72-cryquery-v0-3b/index.html
   Crysis Wars server query implementation in PHP
2. http://aluigi.altervista.org/papers.htm#gsproto
3. http://wiki.unrealadmin.org/UT3_query_protocol
   Contains Unreal Tournament 3 specific value descriptions
4. http://jr.terragate.net/gsQuery/docs/classgameSpyQ.html
5. http://web2.gservers.de/~phillip/projects/clqp/stalker/stalker_internet_query_description.txt
   Stalker specific
6. http://www.penetrate.nl/ut3serverquery.phps
   Unreal Tournament 3 server query implementation in PHP