func (cc *GameConnection) HandleNewConnection() {
defer func() {
delete(cc.Server.PlayerConnections, cc.Player.Uuid)
cc.EntityServer = nil
}()
cc.Server.PlayerConnections[cc.Player.Uuid] = make(chan *protocol.Packet, 256)
cc.Player.EntityId = int64(len(cc.Server.PlayerConnections)+1) + cc.Server.Offset
cc.Player.HeadY = 105
cc.Player.FeetY = 105 - 1.62
cc.Player.OnGround = true
var err error
cc.EntityServer, err = cc.Server.FindEntityServer(cc.Player)
if err != nil {
log.Printf("Failed to connect to entity server: %s", err)
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PreAuthKickID, protocol.CreateJsonMessage("Failed to connect to entity server!", ""))
return
}
cc.EntityServer.SendMessage(&protobuf.PlayerAction{
Player: cc.Player,
Action: protobuf.PlayerAction_JOIN,
})
var x, z int64
for x = -8; x < 8; x++ {
for z = -8; z < 8; z++ {
conn, err := cc.Server.Cluster.ChunkConnection(x, z, cc.Server)
if err != nil {
log.Printf("Failed to connect to chunk server (%d, %d): %s", x, z, err)
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PreAuthKickID, protocol.CreateJsonMessage("Failed to connect to chunk server!", ""))
return
}
conn.SendMessage(&protobuf.ChunkRequest{
X: x,
Z: z,
Uuid: cc.Player.Uuid,
})
}
}
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.LoginSuccessID, cc.Player.Uuid, cc.Player.Username)
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.JoinGameID, int32(cc.Player.EntityId), uint8(1), byte(0), uint8(1), uint8(cc.Server.Size), "default")
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.SpawnPositionID, int32(0), int32(128), int32(0))
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PlayerAbilitiesID, byte(1), float32(0.05), float32(0.1))
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PlayerPositionAndLookID, cc.Player.X, cc.Player.HeadY, cc.Player.Z, cc.Player.Yaw, cc.Player.Pitch, cc.Player.OnGround)
go cc.Server.DrainPlayerConnections(cc)
cc.HandleEncryptedConnection()
}
func (cc *GameConnection) HandleAuth() {
defer func() {
delete(cc.Server.Clients, cc)
cc.Conn.Close()
}()
remoteAddr := cc.Conn.RemoteAddr().String()
state := 0
verifyToken := make([]byte, 0)
for {
cc.Conn.SetReadDeadline(time.Now().Add(time.Second * 10))
id, buf, err := protocol.ReadPacket(cc.Conn)
if err != nil {
err2, ok := err.(net.Error)
if ok && err2.Timeout() {
log.Printf("Timeout handling connection (%s): %s", remoteAddr, err2.Error())
}
return
} else {
switch id {
case 0x00: // Handshake, Status Request, Login start
if state == 1 {
log.Printf("Server pinged from: %s", remoteAddr)
protocol.WriteNewPacket(cc.Conn, protocol.StatusResponseID, cc.Server.GetMinecraftStatus())
} else if state == 2 {
cc.Player.Username, _ = protocol.ReadString(buf, 0)
log.Printf("Got connection from %s", cc.Player.Username)
defer log.Printf("Connection closed for %s", cc.Player.Username)
pubKey := cc.Server.keyPair.Serialize()
verifyToken = protocol.GenerateKey(16)
protocol.WriteNewPacket(cc.Conn, protocol.EncryptionRequestID, "", int16(len(pubKey)), pubKey, int16(len(verifyToken)), verifyToken)
} else {
_, n := protocol.ReadVarint(buf, 0) // version
_, n = protocol.ReadString(buf, n) // address
_, n = protocol.ReadShort(buf, n) // port
nextstate, n := protocol.ReadVarint(buf, n)
state = int(nextstate)
}
case 0x01: // Encryption Response, Ping Request
if state == 2 {
secretLen, n := protocol.ReadShort(buf, 0)
secretEncrypted, n := protocol.ReadBytes(buf, n, secretLen)
tokenLen, n := protocol.ReadShort(buf, n)
tokenEncrypted, n := protocol.ReadBytes(buf, n, tokenLen)
verifyToken2, err := protocol.DecryptRSABytes(tokenEncrypted, cc.Server.keyPair)
if err != nil {
log.Printf("Error decrypting RSA token: %s", err.Error())
return
} else if !bytes.Equal(verifyToken, verifyToken2) {
log.Printf("Error: verification token did not match!")
return
}
sharedSecret, err := protocol.DecryptRSABytes(secretEncrypted, cc.Server.keyPair)
if err != nil {
log.Printf("Error decrypting RSA secret: %s", err.Error())
return
}
cc.ConnEncrypted, err = protocol.NewAESConn(cc.Conn, sharedSecret)
if err != nil {
log.Printf("Error creating AES connection: %s", err.Error())
}
cc.Player.Uuid, err = protocol.CheckAuth(cc.Player.Username, "", cc.Server.keyPair, sharedSecret)
if err != nil {
log.Printf("Failed to verify username %s: %s", cc.Player.Username, err)
protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PreAuthKickID, protocol.CreateJsonMessage("Failed to verify username!", ""))
return
}
// protocol.WriteNewPacket(cc.ConnEncrypted, protocol.PreAuthKickID, protocol.CreateJsonMessage("Server will bbl", "blue"))
cc.HandleNewConnection()
return
} else {
time, _ := protocol.ReadLong(buf, 0)
//fmt.Printf("Ping: %d\n", time)
protocol.WriteNewPacket(cc.Conn, protocol.PingResponseID, time)
return
}
default:
log.Printf("Unknown Packet (state:%d): 0x%X : %s", state, id, hex.Dump(buf))
return
}
}
}
}
func (s *Server) HandleMessage(message interface{}, conn *network.InternalConnection) {
switch req := message.(type) {
case *protobuf.ChatMessage:
player := s.Players[req.Uuid]
message := protocol.CreateJsonMessage("<"+player.Username+"> "+req.Message, "")
log.Printf("Chat: %s", message.Message)
for uuid, p := range s.Players {
p.Conn.SendMessage(&protobuf.ChatMessage{
Message: message.String(),
Uuid: uuid,
})
}
case *protobuf.BlockUpdate:
for uuid, p := range s.Players {
p.Conn.SendMessage(&protobuf.BlockUpdate{
X: req.X,
Y: req.Y,
Z: req.Z,
BlockId: req.BlockId,
BlockMetadata: req.BlockMetadata,
Uuid: uuid,
})
}
case *protobuf.PlayerAction:
player, action := req.GetPlayer(), req.GetAction()
switch action {
case protobuf.PlayerAction_JOIN:
s.Players[player.Uuid] = &PlayerEntity{
Player: protobuf.Player{
Uuid: player.Uuid,
Username: player.Username,
EntityId: player.EntityId,
X: 0,
HeadY: 105,
FeetY: 105 - 1.62,
Z: 0,
},
LastX: 0,
LastY: 105 - 1.62,
LastZ: 0,
Conn: conn,
}
log.Printf("Player joined (%d): %s", player.EntityId, player.Username)
cx, cz := world.ChunkCoordsToNode(0, 0)
for ix := cx; ix >= cx-world.ChunkWidthPerNode; ix -= world.ChunkWidthPerNode {
for iz := cz; iz >= cz-world.ChunkWidthPerNode; iz -= world.ChunkWidthPerNode {
conn, err := s.Cluster.ChunkConnection(ix, iz, s)
if err != nil {
log.Printf("Chunk subscription error (%d, %d): %s", ix, iz, err)
continue
}
conn.SendMessage(&protobuf.Subscription{
Subscribe: true,
})
}
}
for uuid, p := range s.Players {
p.Conn.SendMessage(&protobuf.PlayerAction{
Player: &s.Players[player.Uuid].Player,
Action: protobuf.PlayerAction_JOIN,
Uuid: uuid,
})
if uuid != player.Uuid {
conn.SendMessage(&protobuf.PlayerAction{
Player: &p.Player,
Action: protobuf.PlayerAction_JOIN,
Uuid: player.Uuid,
})
}
}
case protobuf.PlayerAction_MOVE_ABSOLUTE:
responseType := protobuf.PlayerAction_MOVE_RELATIVE
tmp := s.Players[player.Uuid]
if req.Flags&1 == 1 {
if math.Abs(player.X-tmp.LastX) > 3 ||
math.Abs(player.FeetY-tmp.LastY) > 3 ||
math.Abs(player.Z-tmp.LastZ) > 3 {
responseType = protobuf.PlayerAction_MOVE_ABSOLUTE
tmp.LastX = player.X
tmp.LastY = player.FeetY
tmp.LastZ = player.Z
}
}
for uuid, p := range s.Players {
if uuid != player.Uuid {
sendPlayer := protobuf.Player{
Uuid: player.Uuid,
EntityId: tmp.EntityId,
}
if responseType == protobuf.PlayerAction_MOVE_ABSOLUTE {
sendPlayer.X = player.X
sendPlayer.HeadY = player.HeadY
sendPlayer.FeetY = player.FeetY
sendPlayer.Z = player.Z
} else if req.Flags&1 == 1 {
sendPlayer.X = player.X - tmp.X
sendPlayer.FeetY = player.FeetY - tmp.FeetY
sendPlayer.Z = player.Z - tmp.Z
}
if req.Flags&2 == 2 {
sendPlayer.Pitch = player.Pitch
sendPlayer.Yaw = player.Yaw
}
p.Conn.SendMessage(&protobuf.PlayerAction{
Player: &sendPlayer,
Action: responseType,
Uuid: uuid,
Flags: req.Flags,
})
}
}
if req.Flags&1 == 1 {
tmp.X = player.X
tmp.HeadY = player.HeadY
tmp.FeetY = player.FeetY
tmp.Z = player.Z
}
if req.Flags&2 == 2 {
tmp.Pitch = player.Pitch
tmp.Yaw = player.Yaw
}
case protobuf.PlayerAction_LEAVE:
tmp := s.Players[player.Uuid]
delete(s.Players, player.Uuid)
log.Printf("Player left: %s", tmp.Username)
for uuid, p := range s.Players {
sendPlayer := protobuf.Player{
Uuid: player.Uuid,
Username: tmp.Username,
EntityId: tmp.EntityId,
}
p.Conn.SendMessage(&protobuf.PlayerAction{
Player: &sendPlayer,
Action: protobuf.PlayerAction_LEAVE,
Uuid: uuid,
})
}
}
}
}
func (s *Server) HandleMessage(message interface{}, conn *network.InternalConnection) {
switch msg := message.(type) {
case *protobuf.ChunkResponse:
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.MapChunkBulkID, int16(1), int32(len(msg.Data)), true, msg.Data, int32(msg.X), int32(msg.Z), uint16(0xFFFF), uint16(0))
case *protobuf.ChatMessage:
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.ChatMessageID, msg.Message)
case *protobuf.BlockUpdate:
log.Printf("Sending block update to: %s", msg.Uuid)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.BlockChangeID, int32(msg.X), uint8(msg.Y), int32(msg.Z), protocol.Varint{uint64(msg.BlockId)}, uint8(msg.BlockMetadata))
case *protobuf.PlayerAction:
switch msg.Action {
case protobuf.PlayerAction_JOIN:
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.PlayerListItemID, msg.Player.Username, true, int16(0))
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.ChatMessageID, protocol.CreateJsonMessage(msg.Player.Username+" joined the game", "yellow"))
if msg.Uuid != msg.Player.Uuid {
meta := protocol.NewMetadata(
protocol.AbsorptionHeartsID, float32(0),
protocol.OnFireID, false,
protocol.UnknownBitFieldID, byte(0),
protocol.AirID, uint16(0x012c),
protocol.ScoreID, uint32(0),
protocol.HealthID, float32(20),
protocol.PotionColorID, int32(0),
protocol.AmbientPotionID, byte(0),
protocol.ArrowCountID, byte(0),
)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.SpawnPlayerID,
protocol.Varint{uint64(msg.Player.EntityId)},
msg.Player.Uuid,
msg.Player.Username,
protocol.Varint{0},
int32(msg.Player.X*32),
int32(msg.Player.FeetY*32),
int32(msg.Player.Z*32),
byte(msg.Player.Yaw*256/2/math.Pi),
byte(msg.Player.Pitch*256/2/math.Pi),
int16(0),
meta,
)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityMetadataID,
int32(msg.Player.EntityId),
meta,
)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityPropertiesID,
int32(msg.Player.EntityId),
int32(2),
"generic.maxHealth", float64(20), int16(0),
"generic.movementSpeed", float64(0.1), int16(0),
)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityTeleportID,
int32(msg.Player.EntityId),
int32(msg.Player.X*32),
int32(msg.Player.FeetY*32),
int32(msg.Player.Z*32),
byte(msg.Player.Yaw*256/360),
byte(msg.Player.Pitch*256/360),
)
}
case protobuf.PlayerAction_MOVE_RELATIVE:
if msg.Flags == 1 {
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityRelativeMoveID,
int32(msg.Player.EntityId),
byte(msg.Player.X*32),
byte(msg.Player.FeetY*32),
byte(msg.Player.Z*32),
)
} else if msg.Flags == 2 {
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityLookID,
int32(msg.Player.EntityId),
byte(msg.Player.Yaw*256/360),
byte(msg.Player.Pitch*256/360),
)
} else if msg.Flags == 3 {
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityLookAndMoveID,
int32(msg.Player.EntityId),
byte(msg.Player.X*32),
byte(msg.Player.FeetY*32),
byte(msg.Player.Z*32),
byte(msg.Player.Yaw*256/360),
byte(msg.Player.Pitch*256/360),
)
}
if msg.Flags&2 == 2 {
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityHeadLookID, int32(msg.Player.EntityId), byte(msg.Player.Yaw*256/360))
}
case protobuf.PlayerAction_MOVE_ABSOLUTE:
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityTeleportID,
int32(msg.Player.EntityId),
int32(msg.Player.X*32),
int32(msg.Player.FeetY*32),
int32(msg.Player.Z*32),
byte(msg.Player.Yaw*256/360),
byte(msg.Player.Pitch*256/360),
)
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.EntityHeadLookID, int32(msg.Player.EntityId), byte(msg.Player.Yaw*256/360))
case protobuf.PlayerAction_LEAVE:
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.DestroyEntitiesID, byte(1), int32(msg.Player.EntityId))
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.PlayerListItemID, msg.Player.Username, false, int16(0))
s.PlayerConnections[msg.Uuid] <- protocol.CreatePacket(protocol.ChatMessageID, protocol.CreateJsonMessage(msg.Player.Username+" left the game", "yellow"))
}
}
}