gopenfusion/shard/shardServer.go

172 lines
4.7 KiB
Go

package shard
import (
"fmt"
"log"
"net"
"sync"
"time"
"github.com/CPunch/gopenfusion/core"
"github.com/CPunch/gopenfusion/core/db"
"github.com/CPunch/gopenfusion/core/protocol"
)
type LoginMetadata struct {
FEKey []byte
Timestamp time.Time
PlayerID int32
}
type PacketHandler func(peer *protocol.CNPeer, pkt protocol.Packet) error
func stubbedPacket(_ *protocol.CNPeer, _ protocol.Packet) error { /* stubbed */ return nil }
type ShardServer struct {
listener net.Listener
port int
dbHndlr *db.DBHandler
packetHandlers map[uint32]PacketHandler
loginMetadataQueue sync.Map // [int64]*LoginMetadata w/ int64 = serialKey
peersLock sync.Mutex
peers sync.Map // [*protocol.CNPeer]core.Player
}
func NewShardServer(dbHndlr *db.DBHandler, port int) (*ShardServer, error) {
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if err != nil {
return nil, err
}
server := &ShardServer{
listener: listener,
port: port,
dbHndlr: dbHndlr,
packetHandlers: make(map[uint32]PacketHandler),
}
server.packetHandlers = map[uint32]PacketHandler{
protocol.P_CL2FE_REQ_PC_ENTER: server.RequestEnter,
protocol.P_CL2FE_REQ_PC_LOADING_COMPLETE: server.LoadingComplete,
}
return server, nil
}
func (server *ShardServer) RegisterPacketHandler(typeID uint32, hndlr PacketHandler) {
server.packetHandlers[typeID] = hndlr
}
func (server *ShardServer) Start() {
log.Printf("Server hosted on 127.0.0.1:%d\n", server.port)
for {
conn, err := server.listener.Accept()
if err != nil {
log.Println("Connection error: ", err)
return
}
client := protocol.NewCNPeer(server, conn)
server.Connect(client)
go client.Handler()
}
}
func (server *ShardServer) GetPort() int {
return server.port
}
func (server *ShardServer) HandlePacket(peer *protocol.CNPeer, typeID uint32, pkt protocol.Packet) error {
if hndlr, ok := server.packetHandlers[typeID]; ok {
if err := hndlr(peer, pkt); err != nil {
return err
}
} else {
log.Printf("[WARN] invalid packet ID: %x\n", typeID)
}
return nil
}
func (server *ShardServer) Disconnect(peer *protocol.CNPeer) {
log.Printf("Peer %p disconnected from SHARD\n", peer)
server.peers.Delete(peer)
}
func (server *ShardServer) Connect(peer *protocol.CNPeer) {
log.Printf("New peer %p connected to SHARD\n", peer)
server.peers.Store(peer, nil)
}
func (server *ShardServer) LoadPlayer(peer *protocol.CNPeer) *core.Player {
val, ok := server.peers.Load(peer)
if !ok {
return nil
}
plr, ok := val.(*core.Player)
if !ok {
return nil
}
return plr
}
// UpdatePlayer locks the peers map, and calls the provided callback. The returned new pointer will be stored, however if an error returns it will be passed back.
// Since it is UNSAFE to write to the returned pointer from LoadPlayer, this wrapper is for the cases that state in the player struct needs to be updated.
// TODO: maybe LoadPlayer should return a player by value instead?
// The pointers new and old may be the same if you are just updating struct fields.
func (server *ShardServer) UpdatePlayer(peer *protocol.CNPeer, f func(old *core.Player) (new *core.Player, err error)) error {
server.peersLock.Lock()
defer server.peersLock.Unlock()
// on fail, the player should not be stored
new, err := f(server.LoadPlayer(peer))
if err != nil {
return err
}
server.storePlayer(peer, new)
return nil
}
func (server *ShardServer) storePlayer(peer *protocol.CNPeer, player *core.Player) {
server.peers.Store(peer, player)
}
// Simple wrapper for server.peers.Range, if f returns false the iteration is stopped.
func (server *ShardServer) RangePeers(f func(peer *protocol.CNPeer, player *core.Player) bool) {
server.peers.Range(func(key, value any) bool { // simple wrapper to cast the datatypes
peer, ok := key.(*protocol.CNPeer)
if !ok { // this should never happen
panic(fmt.Errorf("ShardServer.peers has an invalid key: peers[%#v] = %#v", key, value))
}
player, ok := value.(*core.Player)
if !ok { // this should also never happen
panic(fmt.Errorf("ShardServer.peers has an invalid value: peers[%#v] = %#v", key, value))
}
return f(peer, player)
})
}
func (server *ShardServer) QueueLogin(serialKey int64, meta *LoginMetadata) {
server.loginMetadataQueue.Store(serialKey, meta)
}
func (server *ShardServer) CheckLogin(serialKey int64) (*LoginMetadata, error) {
value, ok := server.loginMetadataQueue.Load(serialKey)
if !ok {
return nil, fmt.Errorf("serialKey %x is not valid!", serialKey)
}
meta, ok := value.(*LoginMetadata)
if !ok { // should never happen
panic(fmt.Errorf("ShardServer.loginMetadataQueue has an invalid value: loginMetadataQueue[%x] = %#v", serialKey, value))
}
return meta, nil
}