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loginServer/peer: peer no longer uses panic/recover for error recovery

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This commit is contained in:
CPunch 2023-03-10 20:30:16 -06:00
parent 857250bf33
commit d60638d555
3 changed files with 94 additions and 78 deletions
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62
server/login.go
View File

@ -23,7 +23,7 @@ const (
LOGIN_UPDATED_EUALA_REQUIRED = 9
)
func (server *LoginServer) AcceptLogin(peer *Peer, SzID string, IClientVerC int32, ISlotNum int8, data []protocol.SP_LS2CL_REP_CHAR_INFO) {
func (server *LoginServer) AcceptLogin(peer *Peer, SzID string, IClientVerC int32, ISlotNum int8, data []protocol.SP_LS2CL_REP_CHAR_INFO) error {
peer.SzID = SzID
resp := &protocol.SP_LS2CL_REP_LOGIN_SUCC{
@ -35,8 +35,11 @@ func (server *LoginServer) AcceptLogin(peer *Peer, SzID string, IClientVerC int3
UiSvrTime: uint64(time.Now().Unix()),
}
if err := peer.Send(resp, protocol.P_LS2CL_REP_LOGIN_SUCC); err != nil {
return err
}
// swap keys
peer.Send(resp, protocol.P_LS2CL_REP_LOGIN_SUCC)
peer.E_key = protocol.CreateNewKey(
resp.UiSvrTime,
uint64(resp.ICharCount+1),
@ -50,11 +53,15 @@ func (server *LoginServer) AcceptLogin(peer *Peer, SzID string, IClientVerC int3
// send characters (if any)
for i := 0; i < len(data); i++ {
peer.Send(&data[i], protocol.P_LS2CL_REP_CHAR_INFO)
if err := peer.Send(&data[i], protocol.P_LS2CL_REP_CHAR_INFO); err != nil {
return err
}
}
return nil
}
func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) error {
var loginPkt protocol.SP_CL2LS_REQ_LOGIN
pkt.Decode(&loginPkt)
@ -68,7 +75,7 @@ func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) {
// client is resending a login packet??
if peer.AccountID != -1 {
SendError(LOGIN_ERROR)
panic(fmt.Errorf("Out of order P_CL2LS_REQ_LOGIN!"))
return fmt.Errorf("Out of order P_CL2LS_REQ_LOGIN!")
}
// attempt login
@ -79,15 +86,15 @@ func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) {
if err != nil {
// respond with a dummy login error packet so the client doesn't get softlocked
SendError(LOGIN_DATABASE_ERROR)
panic(err)
return err
}
} else if err == db.LoginErrorInvalidPassword {
// respond with invalid password
SendError(LOGIN_ID_AND_PASSWORD_DO_NOT_MATCH)
return
return nil
} else if err != nil { // wtf?
SendError(LOGIN_DATABASE_ERROR)
panic(err)
return err
}
// grab player data
@ -95,7 +102,7 @@ func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) {
plrs, err := db.DefaultDB.GetPlayers(account.AccountID)
if err != nil {
SendError(LOGIN_DATABASE_ERROR)
panic(err)
return err
}
// build character list
@ -115,44 +122,44 @@ func (server *LoginServer) Login(peer *Peer, pkt protocol.Packet) {
AEquip, err := db.DefaultDB.GetPlayerInventorySlots(plr.PlayerID, 0, config.AEQUIP_COUNT-1)
if err != nil {
SendError(LOGIN_DATABASE_ERROR)
panic(err)
return err
}
copy(info.AEquip[:], AEquip)
charInfo = append(charInfo, info)
}
server.AcceptLogin(peer, loginPkt.SzID, loginPkt.IClientVerC, 1, charInfo)
return server.AcceptLogin(peer, loginPkt.SzID, loginPkt.IClientVerC, 1, charInfo)
}
func (server *LoginServer) CheckCharacterName(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) CheckCharacterName(peer *Peer, pkt protocol.Packet) error {
var charPkt protocol.SP_CL2LS_REQ_CHECK_CHAR_NAME
pkt.Decode(&charPkt)
// just auto accept, client resends this data later
peer.Send(&protocol.SP_LS2CL_REP_CHECK_CHAR_NAME_SUCC{
return peer.Send(&protocol.SP_LS2CL_REP_CHECK_CHAR_NAME_SUCC{
SzFirstName: charPkt.SzFirstName,
SzLastName: charPkt.SzLastName,
}, protocol.P_LS2CL_REP_CHECK_CHAR_NAME_SUCC)
}
func (server *LoginServer) SaveCharacterName(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) SaveCharacterName(peer *Peer, pkt protocol.Packet) error {
var charPkt protocol.SP_CL2LS_REQ_SAVE_CHAR_NAME
pkt.Decode(&charPkt)
if peer.AccountID == -1 {
peer.Send(&protocol.SP_LS2CL_REP_SAVE_CHAR_NAME_FAIL{}, protocol.P_LS2CL_REP_SAVE_CHAR_NAME_FAIL)
panic(fmt.Errorf("Out of order P_LS2CL_REP_SAVE_CHAR_NAME_FAIL!"))
return fmt.Errorf("Out of order P_LS2CL_REP_SAVE_CHAR_NAME_FAIL!")
}
// TODO: sanity check SzFirstName && SzLastName
PlayerID, err := db.DefaultDB.NewPlayer(peer.AccountID, charPkt.SzFirstName, charPkt.SzLastName, int(charPkt.ISlotNum))
if err != nil {
peer.Send(&protocol.SP_LS2CL_REP_SAVE_CHAR_NAME_FAIL{}, protocol.P_LS2CL_REP_SAVE_CHAR_NAME_FAIL)
panic(err)
return err
}
peer.Send(&protocol.SP_LS2CL_REP_SAVE_CHAR_NAME_SUCC{
return peer.Send(&protocol.SP_LS2CL_REP_SAVE_CHAR_NAME_SUCC{
IPC_UID: int64(PlayerID),
ISlotNum: charPkt.ISlotNum,
IGender: charPkt.IGender,
@ -187,28 +194,28 @@ func validateCharacterCreation(character *protocol.SP_CL2LS_REQ_CHAR_CREATE) boo
return true
}
func (server *LoginServer) CharacterCreate(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) CharacterCreate(peer *Peer, pkt protocol.Packet) error {
var charPkt protocol.SP_CL2LS_REQ_CHAR_CREATE
pkt.Decode(&charPkt)
if !validateCharacterCreation(&charPkt) {
peer.Send(&protocol.SP_LS2CL_REP_SHARD_SELECT_FAIL{IErrorCode: 2}, protocol.P_LS2CL_REP_SHARD_SELECT_FAIL)
panic(fmt.Errorf("invalid SP_CL2LS_REQ_CHAR_CREATE!"))
return fmt.Errorf("invalid SP_CL2LS_REQ_CHAR_CREATE!")
}
if err := db.DefaultDB.FinishPlayer(&charPkt, peer.AccountID); err != nil {
peer.Send(&protocol.SP_LS2CL_REP_SHARD_SELECT_FAIL{IErrorCode: 2}, protocol.P_LS2CL_REP_SHARD_SELECT_FAIL)
panic(err)
return err
}
plr, err := db.DefaultDB.GetPlayer(int(charPkt.PCStyle.IPC_UID))
if err != nil {
peer.Send(&protocol.SP_LS2CL_REP_SHARD_SELECT_FAIL{IErrorCode: 2}, protocol.P_LS2CL_REP_SHARD_SELECT_FAIL)
panic(err)
return err
}
PCStyle, PCStyle2 := util.Player2PCStyle(plr)
peer.Send(&protocol.SP_LS2CL_REP_CHAR_CREATE_SUCC{
return peer.Send(&protocol.SP_LS2CL_REP_CHAR_CREATE_SUCC{
ILevel: int16(plr.Level),
SPC_Style: PCStyle,
SPC_Style2: PCStyle2,
@ -216,29 +223,30 @@ func (server *LoginServer) CharacterCreate(peer *Peer, pkt protocol.Packet) {
}, protocol.P_LS2CL_REP_CHAR_CREATE_SUCC)
}
func (server *LoginServer) CharacterDelete(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) CharacterDelete(peer *Peer, pkt protocol.Packet) error {
var charPkt protocol.SP_CL2LS_REQ_CHAR_DELETE
pkt.Decode(&charPkt)
slot, err := db.DefaultDB.DeletePlayer(int(charPkt.IPC_UID), peer.AccountID)
if err != nil {
peer.Send(&protocol.SP_LS2CL_REP_SHARD_SELECT_FAIL{IErrorCode: 2}, protocol.P_LS2CL_REP_SHARD_SELECT_FAIL)
panic(err)
return err
}
peer.Send(&protocol.SP_LS2CL_REP_CHAR_DELETE_SUCC{
return peer.Send(&protocol.SP_LS2CL_REP_CHAR_DELETE_SUCC{
ISlotNum: int8(slot),
}, protocol.P_LS2CL_REP_CHAR_DELETE_SUCC)
}
func (server *LoginServer) FinishTutorial(peer *Peer, pkt protocol.Packet) {
func (server *LoginServer) FinishTutorial(peer *Peer, pkt protocol.Packet) error {
var charPkt protocol.SP_CL2LS_REQ_SAVE_CHAR_TUTOR
pkt.Decode(&charPkt)
if err := db.DefaultDB.FinishTutorial(int(charPkt.IPC_UID), peer.AccountID); err != nil {
peer.Send(&protocol.SP_LS2CL_REP_SHARD_SELECT_FAIL{IErrorCode: 2}, protocol.P_LS2CL_REP_SHARD_SELECT_FAIL)
panic(err)
return err
}
// no response
return nil
}

66
server/loginserver.go
View File

@ -8,8 +8,11 @@ import (
"github.com/CPunch/gopenfusion/protocol"
)
type PacketHandler func(peer *Peer, pkt protocol.Packet) error
type LoginServer struct {
listener net.Listener
packetHandlers map[uint32]PacketHandler
peers map[*Peer]bool
peersLock sync.Mutex
}
@ -20,10 +23,32 @@ func NewLoginServer() *LoginServer {
log.Fatal(err)
}
return &LoginServer{
loginServer := &LoginServer{
listener: listener,
packetHandlers: make(map[uint32]PacketHandler),
peers: make(map[*Peer]bool),
}
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_LOGIN, loginServer.Login)
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_CHECK_CHAR_NAME, loginServer.CheckCharacterName)
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_SAVE_CHAR_NAME, loginServer.SaveCharacterName)
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_CHAR_CREATE, loginServer.CharacterCreate)
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_CHAR_SELECT, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_CHAR_DELETE, loginServer.CharacterDelete)
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_SHARD_SELECT, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_SHARD_LIST_INFO, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_CHECK_NAME_LIST, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_SAVE_CHAR_TUTOR, loginServer.FinishTutorial)
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_PC_EXIT_DUPLICATE, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REP_LIVE_CHECK, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_CHANGE_CHAR_NAME, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
// loginServer.RegisterPacketHandler(protocol.P_CL2LS_REQ_SERVER_SELECT, func(_ *Peer, _ protocol.Packet) error { /* stubbed */ return nil })
return loginServer
}
func (server *LoginServer) RegisterPacketHandler(typeID uint32, hndlr PacketHandler) {
server.packetHandlers[typeID] = hndlr
}
func (server *LoginServer) Start() {
@ -42,39 +67,16 @@ func (server *LoginServer) Start() {
}
}
func (server *LoginServer) HandlePacket(peer *Peer, typeID uint32, pkt protocol.Packet) {
switch typeID {
case protocol.P_CL2LS_REQ_LOGIN:
server.Login(peer, pkt)
case protocol.P_CL2LS_REQ_CHECK_CHAR_NAME:
server.CheckCharacterName(peer, pkt)
case protocol.P_CL2LS_REQ_SAVE_CHAR_NAME:
server.SaveCharacterName(peer, pkt)
case protocol.P_CL2LS_REQ_CHAR_CREATE:
server.CharacterCreate(peer, pkt)
case protocol.P_CL2LS_REQ_CHAR_SELECT:
/* stubbed */
case protocol.P_CL2LS_REQ_CHAR_DELETE:
server.CharacterDelete(peer, pkt)
case protocol.P_CL2LS_REQ_SHARD_SELECT:
/* stubbed */
case protocol.P_CL2LS_REQ_SHARD_LIST_INFO:
/* stubbed */
case protocol.P_CL2LS_CHECK_NAME_LIST:
/* stubbed */
case protocol.P_CL2LS_REQ_SAVE_CHAR_TUTOR:
server.FinishTutorial(peer, pkt)
case protocol.P_CL2LS_REQ_PC_EXIT_DUPLICATE:
/* stubbed */
case protocol.P_CL2LS_REP_LIVE_CHECK:
/* stubbed */
case protocol.P_CL2LS_REQ_CHANGE_CHAR_NAME:
/* stubbed */
case protocol.P_CL2LS_REQ_SERVER_SELECT:
/* stubbed */
default:
func (server *LoginServer) HandlePacket(peer *Peer, 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] unsupported packet ID: %x\n", typeID)
}
return nil
}
func (server *LoginServer) Disconnect(peer *Peer) {

34
server/peer.go
View File

@ -18,7 +18,7 @@ const (
)
type PeerHandler interface {
HandlePacket(client *Peer, typeID uint32, pkt protocol.Packet)
HandlePacket(client *Peer, typeID uint32, pkt protocol.Packet) error
Connect(client *Peer)
Disconnect(client *Peer)
}
@ -49,7 +49,7 @@ func NewPeer(handler PeerHandler, conn net.Conn) *Peer {
}
}
func (client *Peer) Send(data interface{}, typeID uint32) {
func (client *Peer) Send(data interface{}, typeID uint32) error {
buf := pool.Get()
defer func() { // always return the buffer to the pool
pool.Put(buf)
@ -76,8 +76,10 @@ func (client *Peer) Send(data interface{}, typeID uint32) {
// write packet type && packet body
log.Printf("Sending %#v, sizeof: %d", data, buf.Len())
if _, err := client.conn.Write(buf.Bytes()); err != nil {
panic(fmt.Errorf("[FATAL] failed to write packet body! %v", err))
return fmt.Errorf("[FATAL] failed to write packet body! %v", err)
}
return nil
}
func (client *Peer) Kill() {
@ -91,29 +93,27 @@ func (client *Peer) Kill() {
}
func (client *Peer) ClientHandler() {
defer func() {
if err := recover(); err != nil {
log.Printf("Client %p panic'd! %v", client, err)
}
client.Kill()
}()
defer client.Kill()
for {
// read packet size
var sz uint32
if err := binary.Read(client.conn, binary.LittleEndian, &sz); err != nil {
panic(fmt.Errorf("[FATAL] failed to read packet size! %v", err))
log.Printf("[FATAL] failed to read packet size! %v\n", err)
return
}
// client should never send a packet size outside of this range
if sz > protocol.CN_PACKET_BUFFER_SIZE || sz < 4 {
panic(fmt.Errorf("[FATAL] malicious packet size received! %d", sz))
log.Printf("[FATAL] malicious packet size received! %d", sz)
return
}
// read packet body
buf := pool.Get()
if _, err := buf.ReadFrom(io.LimitReader(client.conn, int64(sz))); err != nil {
panic(fmt.Errorf("[FATAL] failed to read packet body! %v", err))
log.Printf("[FATAL] failed to read packet body! %v", err)
return
}
// decrypt
@ -122,11 +122,17 @@ func (client *Peer) ClientHandler() {
// create packet && read typeID
var typeID uint32
pkt := protocol.NewPacket(buf)
pkt.Decode(&typeID)
if err := pkt.Decode(&typeID); err != nil {
log.Printf("[FATAL] failed to read packet type! %v", err)
return
}
// dispatch packet
log.Printf("Got packet ID: %x, with a sizeof: %d\n", typeID, sz)
client.handler.HandlePacket(client, typeID, pkt)
if err := client.handler.HandlePacket(client, typeID, pkt); err != nil {
log.Printf("[FATAL] %v", err)
return
}
// restore buffer to pool
pool.Put(buf)