holy refactor

started out as me making a service abstraction..

- db.Player exists again, and entity.Player uses it as an embedded struct
- chunk.ForEachEntity() lets you add/remove entities during iteration now
- removed account related fields from CNPeer
- protocol/pool has been merged with protocol.
use protocol.GetBuffer() and protocol.PutBuffer().
- new protocol/internal/service!
service.Service is an abstraction layer to handle multiple CNPeer*
connections and allows you to associate each with an interface{} uData.
In the future it might also handle a task queue for jobs that
modify/interact with the player's uData, called from service.handleEvents()
- PacketHandler callback type has a new param! uData is passed as well now
- much of loginserver/shardserver is now handled by the shared service
abstraction
- SHARD: NPC_ENTER packets are now sent on player loading complete
rather than on enter.

login/loginserver.go

@@ -1,126 +1,52 @@
 package login
 
 import (
-	"fmt"
-	"log"
-	"net"
-	"sync"
-
-	"github.com/CPunch/gopenfusion/config"
 	"github.com/CPunch/gopenfusion/internal/db"
 	"github.com/CPunch/gopenfusion/internal/protocol"
-	"github.com/CPunch/gopenfusion/internal/protocol/pool"
 	"github.com/CPunch/gopenfusion/internal/redis"
+	"github.com/CPunch/gopenfusion/internal/service"
 )
 
-type PacketHandler func(peer *protocol.CNPeer, pkt protocol.Packet) error
-
-func stubbedPacket(_ *protocol.CNPeer, _ protocol.Packet) error { /* stubbed */ return nil }
-
 type LoginServer struct {
-	listener       net.Listener
-	port           int
-	dbHndlr        *db.DBHandler
-	redisHndlr     *redis.RedisHandler
-	eRecv          chan *protocol.Event
-	peers          map[*protocol.CNPeer]bool
-	packetHandlers map[uint32]PacketHandler
-	peerLock       sync.Mutex
+	service    *service.Service
+	dbHndlr    *db.DBHandler
+	redisHndlr *redis.RedisHandler
 }
 
 func NewLoginServer(dbHndlr *db.DBHandler, redisHndlr *redis.RedisHandler, port int) (*LoginServer, error) {
-	listener, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
+	srvc, err := service.NewService("LOGIN", port)
 	if err != nil {
 		return nil, err
 	}
 
 	server := &LoginServer{
-		listener:   listener,
-		port:       port,
+		service:    srvc,
 		dbHndlr:    dbHndlr,
 		redisHndlr: redisHndlr,
-		peers:      make(map[*protocol.CNPeer]bool),
-		eRecv:      make(chan *protocol.Event),
 	}
 
-	server.packetHandlers = map[uint32]PacketHandler{
-		protocol.P_CL2LS_REQ_LOGIN:             server.Login,
-		protocol.P_CL2LS_REQ_CHECK_CHAR_NAME:   server.CheckCharacterName,
-		protocol.P_CL2LS_REQ_SAVE_CHAR_NAME:    server.SaveCharacterName,
-		protocol.P_CL2LS_REQ_CHAR_CREATE:       server.CharacterCreate,
-		protocol.P_CL2LS_REQ_CHAR_SELECT:       server.ShardSelect,
-		protocol.P_CL2LS_REQ_CHAR_DELETE:       server.CharacterDelete,
-		protocol.P_CL2LS_REQ_SHARD_SELECT:      stubbedPacket,
-		protocol.P_CL2LS_REQ_SHARD_LIST_INFO:   stubbedPacket,
-		protocol.P_CL2LS_CHECK_NAME_LIST:       stubbedPacket,
-		protocol.P_CL2LS_REQ_SAVE_CHAR_TUTOR:   server.FinishTutorial,
-		protocol.P_CL2LS_REQ_PC_EXIT_DUPLICATE: stubbedPacket,
-		protocol.P_CL2LS_REP_LIVE_CHECK:        stubbedPacket,
-		protocol.P_CL2LS_REQ_CHANGE_CHAR_NAME:  stubbedPacket,
-		protocol.P_CL2LS_REQ_SERVER_SELECT:     stubbedPacket,
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_LOGIN, server.Login)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_CHECK_CHAR_NAME, server.CheckCharacterName)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_SAVE_CHAR_NAME, server.SaveCharacterName)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_CHAR_CREATE, server.CharacterCreate)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_CHAR_SELECT, server.ShardSelect)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_CHAR_DELETE, server.CharacterDelete)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_SHARD_SELECT, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_SHARD_LIST_INFO, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_CHECK_NAME_LIST, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_SAVE_CHAR_TUTOR, server.FinishTutorial)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_PC_EXIT_DUPLICATE, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REP_LIVE_CHECK, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_CHANGE_CHAR_NAME, service.StubbedPacket)
+	srvc.AddPacketHandler(protocol.P_CL2LS_REQ_SERVER_SELECT, service.StubbedPacket)
+
+	srvc.OnConnect = func(peer *protocol.CNPeer) interface{} {
+		return nil
 	}
 
 	return server, nil
 }
 
 func (server *LoginServer) Start() {
-	log.Printf("Login service hosted on %s:%d\n", config.GetAnnounceIP(), server.port)
-
-	go server.handleEvents()
-	for {
-		conn, err := server.listener.Accept()
-		if err != nil {
-			log.Println("Connection error: ", err)
-			return
-		}
-
-		client := protocol.NewCNPeer(server.eRecv, conn)
-		server.connect(client)
-		go client.Handler()
-	}
-}
-
-func (server *LoginServer) handleEvents() {
-	for event := range server.eRecv {
-		switch event.Type {
-		case protocol.EVENT_CLIENT_DISCONNECT:
-			server.disconnect(event.Peer)
-		case protocol.EVENT_CLIENT_PACKET:
-			if err := server.handlePacket(event.Peer, event.PktID, protocol.NewPacket(event.Pkt)); err != nil {
-				log.Printf("Error handling packet: %v", err)
-				event.Peer.Kill()
-			}
-
-			// the packet is given to us by the event, so we'll need to make sure to return it to the pool
-			pool.Put(event.Pkt)
-		}
-	}
-}
-
-func (server *LoginServer) 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] unknown packet ID: %x\n", typeID)
-	}
-
-	return nil
-}
-
-func (server *LoginServer) disconnect(peer *protocol.CNPeer) {
-	server.peerLock.Lock()
-	defer server.peerLock.Unlock()
-
-	log.Printf("Peer %p disconnected from LOGIN\n", peer)
-	delete(server.peers, peer)
-}
-
-func (server *LoginServer) connect(peer *protocol.CNPeer) {
-	server.peerLock.Lock()
-	defer server.peerLock.Unlock()
-
-	log.Printf("New peer %p connected to LOGIN\n", peer)
-	server.peers[peer] = true
+	server.service.Start()
 }