func (l *pktHandler) handle() {
var err, clientErr error
defer func() {
if err != nil {
log.Print("Connection closed ", err.Error())
if clientErr == nil {
clientErr = clientErrGeneral
}
proto.WriteDisconnect(l.conn, clientErr.Error())
l.conn.Close()
}
}()
err = proto.ServerReadPacketExpect(l.conn, l, []byte{
proto.PacketIdHandshake,
proto.PacketIdServerListPing,
})
if err != nil {
clientErr = clientErrLoginGeneral
return
}
switch l.connType {
case connTypeLogin:
err, clientErr = l.handleLogin(l.conn)
case connTypeServerQuery:
err, clientErr = l.handleServerQuery(l.conn)
default:
err = loginErrorConnType
}
}
// Negotiate a new player client login. This function runs in a new goroutine
// for each player connection and therefore should not attempt to alter the
// game structure without enqueue().
func (game *Game) login(conn net.Conn) {
// TODO: This function should access game in a thread-safe way for reading
var err, clientErr os.Error
defer func() {
if err != nil {
log.Print(err.String())
if clientErr == nil {
clientErr = os.NewError("Server error.")
}
proto.WriteDisconnect(conn, clientErr.String())
conn.Close()
}
}()
var username string
if username, err = proto.ServerReadHandshake(conn); err != nil {
clientErr = os.NewError("Handshake error.")
return
}
if !validPlayerUsername.MatchString(username) {
err = os.NewError("Bad username")
clientErr = err
return
}
log.Print("Client ", conn.RemoteAddr(), " connected as ", username)
if game.UnderMaintenanceMsg != "" {
err = fmt.Errorf("Server under maintenance, kicking player: %q", username)
clientErr = os.NewError(game.UnderMaintenanceMsg)
return
}
// Load player permissions.
permissions := gamerules.Permissions.UserPermissions(username)
if !permissions.Has("login") {
err = fmt.Errorf("Player %q does not have login permission", username)
clientErr = os.NewError("You do not have access to this server.")
return
}
if err = proto.ServerWriteHandshake(conn, game.serverId); err != nil {
clientErr = os.NewError("Handshake error.")
return
}
if game.serverId != "-" {
var authenticated bool
authserver := &server_auth.ServerAuth{"http://www.minecraft.net/game/checkserver.jsp"}
authenticated, err = authserver.Authenticate(game.serverId, username)
if !authenticated || err != nil {
var reason string
if err != nil {
reason = "Authentication check failed: " + err.String()
} else {
reason = "Failed authentication"
}
err = fmt.Errorf("Client %v: %s", conn.RemoteAddr(), reason)
clientErr = os.NewError(reason)
return
}
log.Print("Client ", conn.RemoteAddr(), " passed minecraft.net authentication")
}
if _, err = proto.ServerReadLogin(conn); err != nil {
clientErr = os.NewError("Login error.")
return
}
entityId := game.entityManager.NewEntity()
var playerData nbt.ITag
if playerData, err = game.worldStore.PlayerData(username); err != nil {
clientErr = os.NewError("Error reading user data. Please contact the server administrator.")
return
}
player := player.NewPlayer(entityId, game.shardManager, conn, username, game.worldStore.SpawnPosition, game.playerDisconnect, game)
if playerData != nil {
if err = player.ReadNbt(playerData); err != nil {
// Don't let the player log in, as they will only have default inventory
// etc., which could lose items from them. Better for an administrator to
// sort this out.
err = fmt.Errorf("Error parsing player data for %q: %v", username, err)
clientErr = os.NewError("Error reading user data. Please contact the server administrator.")
return
}
}
game.playerConnect <- player
player.Start()
}