gopenfusion/shard/shardServer.go

138 lines
3.7 KiB
Go

package shard
import (
"fmt"
"log"
"net"
"sync"
"github.com/CPunch/gopenfusion/config"
"github.com/CPunch/gopenfusion/core"
"github.com/CPunch/gopenfusion/core/db"
"github.com/CPunch/gopenfusion/core/protocol"
"github.com/CPunch/gopenfusion/core/redis"
)
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
redisHndlr *redis.RedisHandler
packetHandlers map[uint32]PacketHandler
peersLock sync.Mutex
peers map[*protocol.CNPeer]*core.Player
}
func NewShardServer(dbHndlr *db.DBHandler, redisHndlr *redis.RedisHandler, 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,
redisHndlr: redisHndlr,
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,
}
redisHndlr.RegisterShard(redis.ShardMetadata{
IP: config.GetAnnounceIP(),
Port: port,
})
return server, nil
}
func (server *ShardServer) RegisterPacketHandler(typeID uint32, hndlr PacketHandler) {
server.packetHandlers[typeID] = hndlr
}
func (server *ShardServer) Start() {
log.Printf("Shard service hosted on %s:%d\n", config.GetAnnounceIP(), 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)
delete(server.peers, peer)
}
func (server *ShardServer) Connect(peer *protocol.CNPeer) {
log.Printf("New peer %p connected to SHARD\n", peer)
server.peers[peer] = nil
}
// Returns a copy of the player
func (server *ShardServer) LoadPlayer(peer *protocol.CNPeer) (core.Player, error) {
plr, ok := server.peers[peer]
if !ok {
return core.Player{}, fmt.Errorf("Player not found")
}
return *plr, nil
}
// 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.
// The pointers new and old may be the same if you are just updating struct fields. This function should NOT be called recursively.
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.peers[peer])
if err != nil {
return err
}
server.peers[peer] = new
return nil
}
// If f returns false the iteration is stopped.
func (server *ShardServer) RangePeers(f func(peer *protocol.CNPeer) bool) {
for peer := range server.peers {
if f(peer) {
return
}
}
}