func RejectHandler(conn *WrapedSocket, initial_pkt *mcproto.MCHandShake, e *mcchat.ChatMsg) {
if initial_pkt.NextState == 1 {
conn.Infof("ping packet")
pkt, err := mcproto.ReadPacket(conn)
if err != nil {
conn.Errorf("Error when reading status request: %s", err.Error())
conn.Close()
return
}
if !pkt.IsStatusRequest() {
conn.Errorf("Invalid protocol: no status request.")
conn.Close()
return
}
conn.Debugf("status: request")
resp := new(mcproto.MCStatusResponse)
resp.Description = e
resp.Version.Name = "minegate"
resp.Version.Protocol = 0
resp_pkt, err := resp.ToRawPacket()
if err != nil {
conn.Errorf("Unable to make packet: %s", err.Error())
conn.Close()
return
}
_, err = conn.Write(resp_pkt.ToBytes())
if err != nil {
log.Errorf("Unable to write response: %s", err.Error())
conn.Close()
return
}
pkt, err = mcproto.ReadPacket(conn)
if err != nil {
if err != io.EOF {
log.Errorf("Unable to read packet: %s", err.Error())
}
conn.Close()
return
}
if !pkt.IsStatusPing() {
log.Error("Invalid protocol: no status ping.")
conn.Close()
return
}
conn.Write(pkt.ToBytes()) // Don't care now.
} else {
log.Info("login packet")
kick_pkt := (*mcproto.MCKick)(e)
raw_pkt, err := kick_pkt.ToRawPacket()
if err != nil {
log.Errorf("Unable to make packet: %s", err.Error())
conn.Close()
return
}
// Don't care now
conn.Write(raw_pkt.ToBytes())
}
conn.Close()
return
}
func proxy(conn *WrapedSocket, upstream *Upstream, initial_pkt *mcproto.MCHandShake, ne *PostAcceptEvent) {
addr, perr := net.ResolveTCPAddr("tcp", upstream.Server)
var err error
var upsock *net.TCPConn
if perr == nil {
upsock, err = net.DialTCP("tcp", nil, addr)
}
if err != nil || perr != nil {
if err == nil {
err = perr
}
log.Errorf("Unable to connect to upstream %s", upstream.Server)
RejectHandler(conn, initial_pkt, upstream.ChatMsg)
return
}
upconn := WrapUpstreamSocket(upsock, conn)
if initial_pkt.NextState == 1 {
// Handle ping here.
conn.Debugf("ping proxy")
pre := new(PingRequestEvent)
pre.NetworkEvent = ne.NetworkEvent
pre.Packet = initial_pkt
pre.Upstream = upstream
PingRequest(pre)
if pre.Rejected() {
if pre.reason == "" {
conn.Warnf("Ping request was rejected.")
pre.reason = "Request was rejected by plugin."
} else {
conn.Warnf("Ping request was rejected: %s", pre.reason)
}
e := mcchat.NewMsg(pre.reason)
e.SetColor(mcchat.RED)
e.SetBold(true)
RejectHandler(conn, initial_pkt, e)
return
}
init_raw, err := initial_pkt.ToRawPacket()
if err != nil {
log.Errorf("Unable to encode initial packet: %s", err.Error())
conn.Close()
upconn.Close()
return
}
pkt, err := mcproto.ReadPacket(conn)
if err != nil {
conn.Errorf("Error when reading status request: %s", err.Error())
conn.Close()
upconn.Close()
return
}
if !pkt.IsStatusRequest() {
conn.Errorf("Invalid protocol: no status request.")
conn.Close()
upconn.Close()
return
}
_, err = upconn.Write(init_raw.ToBytes())
if err == nil {
_, err = upconn.Write(pkt.ToBytes())
}
if err != nil {
upconn.Errorf("write error: %s", err.Error())
conn.Close()
upconn.Close()
return
}
resp_pkt, err := mcproto.ReadPacket(upconn)
if err != nil {
upconn.Errorf("invalid packet: %s", err.Error())
conn.Close()
upconn.Close()
return
}
resp, err := resp_pkt.ToStatusResponse()
if err != nil {
upconn.Errorf("invalid packet: %s", err.Error())
conn.Close()
upconn.Close()
return
}
psre := new(PreStatusResponseEvent)
psre.NetworkEvent = ne.NetworkEvent
psre.Packet = resp
psre.Upstream = upstream
PreStatusResponse(psre)
resp_pkt, err = resp.ToRawPacket()
if err != nil {
conn.Errorf("invalid packet: %s", err.Error())
conn.Close()
upconn.Close()
return
}
// We can handle ping request, close upstream
upconn.Close()
_, err = conn.Write(resp_pkt.ToBytes())
if err != nil {
conn.Errorf("write error: %s", err.Error())
conn.Close()
return
}
ping_pkt, err := mcproto.ReadPacket(conn)
if err != nil || !ping_pkt.IsStatusPing() {
if err == nil {
err = errors.New("packet is not ping")
}
conn.Errorf("invalid packet: %s", err.Error())
conn.Close()
return
}
_, err = conn.Write(ping_pkt.ToBytes())
conn.Close()
} else {
// Handle login here.
conn.Debugf("login proxy")
login_raw, err := mcproto.ReadPacket(conn)
if err != nil {
conn.Errorf("Read login packet: %s", err.Error())
conn.Close()
return
}
login_pkt, err := login_raw.ToLogin()
if err != nil {
conn.Errorf("invalid packet: %s", err.Error())
conn.Close()
return
}
lre := new(LoginRequestEvent)
lre.NetworkEvent = ne.NetworkEvent
lre.InitPacket = initial_pkt
lre.LoginPacket = login_pkt
lre.Upstream = upstream
LoginRequest(lre)
if lre.Rejected() {
if lre.reason == "" {
conn.Warnf("Ping request was rejected.")
lre.reason = "Request was rejected by plugin."
} else {
conn.Warnf("Ping request was rejected: %s", lre.reason)
}
e := mcchat.NewMsg(lre.reason)
e.SetColor(mcchat.RED)
e.SetBold(true)
RejectHandler(conn, initial_pkt, e)
return
}
init_raw, err := initial_pkt.ToRawPacket()
if err != nil {
log.Errorf("Unable to encode initial packet: %s", err.Error())
conn.Close()
return
}
login_raw, err = login_pkt.ToRawPacket()
if err != nil {
log.Errorf("Unable to encode login packet: %s", err.Error())
conn.Close()
return
}
_, err = upconn.Write(init_raw.ToBytes())
if err == nil {
upconn.Write(login_raw.ToBytes())
}
if err != nil {
upconn.Errorf("write error: %s", err.Error())
}
spe := new(StartProxyEvent)
spe.Upstream = upstream
spe.NetworkEvent = ne.NetworkEvent
spe.InitPacket = initial_pkt
spe.LoginPacket = login_pkt
StartProxy(spe)
go PipeIt(conn, upconn)
go PipeIt(upconn, conn)
}
}
