Exemplo n.º 1
0
func ClientSocket(conn *WrapedSocket, ne *PostAcceptEvent) {
	init_pkt, err := mcproto.ReadInitialPacket(conn)
	if err != nil {
		if mcproto.IsOldClient(err) {
			// TODO: Implements 1.6- protocol.
			conn.Warnf("1.6- protocol")
			b, _ := err.(mcproto.OldClient)
			if b == 0x02 { // Login
			} else { // Status
			}
			conn.Close()
			return
		} else {
			conn.Errorf("error reading first packet: %s", err.Error())
			conn.Close()
			return
		}
	}
	handshake, err := init_pkt.ToHandShake()
	if err != nil {
		conn.Errorf("Invalid handshake packet: %s", err.Error())
		conn.Close()
		return
	}
	pre := new(PreRoutingEvent)
	pre.NetworkEvent = ne.NetworkEvent
	pre.Packet = handshake
	PreRouting(pre)
	if pre.Rejected() {
		if pre.reason == "" {
			conn.Warnf("Routing request was rejected.")
			pre.reason = "Request was rejected by plugin."
		} else {
			conn.Warnf("Routing request was rejected: %s", pre.reason)
		}
		e := mcchat.NewMsg(pre.reason)
		e.SetColor(mcchat.RED)
		e.SetBold(true)
		RejectHandler(conn, handshake, e)
	} else {
		upstream, e := GetUpstream(handshake.ServerAddr)
		if e != nil {
			RejectHandler(conn, handshake, e)
			return
		}
		proxy(conn, upstream, handshake, ne)
	}

}
Exemplo n.º 2
0
func ToChatMsg(msg *ChatMessage) (res *mcchat.ChatMsg) {
	res = mcchat.NewMsg(msg.Text)
	msg.Color = strings.ToLower(msg.Color)
	if msg.Color != "" {
		color := mcchat.GetColor(msg.Color)
		if color == -1 {
			log.Warnf("Invalid color: %s, assume white.", msg.Color)
			msg.Color = "white"
			color = mcchat.GetColor("white")
		}
		res.SetColor(color)
	}
	res.SetBold(msg.Bold)
	res.SetItalic(msg.Italic)
	res.SetUnderlined(msg.Underlined)
	res.SetStrikeThrough(msg.Strikethrough)
	if msg.Hover != "" {
		res.HoverMsg(msg.Hover)
	}
	if msg.Click != "" {
		res.ClickTarget(msg.Click)
	}
	return
}
Exemplo n.º 3
0
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)
	}
}