Esempio n. 1
0
func parseFlowRequest(r *xio.PacketReader) (*flowRequest, error) {
	var err error
	flags := uint8(0)
	if flags, err = r.Read8(); err != nil {
		return nil, errors.New("flow.read flags")
	}
	fid := uint64(0)
	if fid, err = r.Read7BitValue64(); err != nil {
		return nil, errors.New("flow.read fid")
	}
	stage, delta := uint64(0), uint64(0)
	if stage, err = r.Read7BitValue64(); err != nil {
		return nil, errors.New("flow.read stage")
	}
	if delta, err = r.Read7BitValue64(); err != nil {
		return nil, errors.New("flow.read delta")
	}
	signature := ""
	if (flags & flagsHeader) != 0 {
		if signature, err = r.ReadString8(); err != nil {
			return nil, errors.New("flow.read signature")
		}
		for {
			if size, err := r.Read8(); err != nil {
				return nil, errors.New("flow.read header content size")
			} else if size == 0 {
				break
			} else if n := int(size); n > r.Len() {
				return nil, errors.New("flows.too big header content size")
			} else if err = r.Skip(n); err != nil {
				return nil, errors.New("flows.skip header")
			}
		}
	}
	data := r.Bytes()
	req := &flowRequest{}
	req.fid = fid
	req.signature = signature
	req.stage = stage
	req.stageack = stage - delta
	req.slices = make([]*flowRequestSlice, 0, 4)
	req.AddSlice(&flowRequestSlice{flags, data})
	return req, nil
}
Esempio n. 2
0
func parseFlowAck(r *xio.PacketReader) (*flowAck, error) {
	if stage, err := r.Read7BitValue64(); err != nil {
		return nil, err
	} else {
		ack := newFlowAck(stage)
		var beg, end uint64
		for r.Len() != 0 {
			if beg, err = r.Read7BitValue64(); err != nil {
				return nil, err
			}
			if end, err = r.Read7BitValue64(); err != nil {
				return nil, err
			}
			beg = beg + stage + 2
			end = end + beg
			ack.AddRange(beg, end)
			stage = end
		}
		return ack, nil
	}
}
Esempio n. 3
0
func ParseRequestMessage(r *xio.PacketReader) (*RequestMessage, error) {
	var err error
	code := uint8(0)
	if code, err = r.Read8(); err != nil {
		return nil, errors.New("message.read code")
	} else if code == 0xff {
		return nil, EOP
	}
	var size uint16
	if size, err = r.Read16(); err != nil {
		return nil, errors.New("message.read size")
	}
	rlen := r.Len()
	mlen := int(size)
	if rlen < mlen {
		return nil, errors.New("message.bad content length")
	} else {
		data := r.Bytes()[:mlen]
		if err := r.Skip(mlen); err != nil {
			return nil, errors.New("message.skip forward")
		}
		return &RequestMessage{code, xio.NewPacketReader(data)}, nil
	}
}
Esempio n. 4
0
func (s *Session) handle(r *xio.PacketReader) error {
	if marker, err := r.Read8(); err != nil {
		return errors.New("packet.read marker")
	} else {
		if s.stmptime, err = r.Read16(); err != nil {
			return errors.New("packet.read time")
		}
		switch marker | 0xf0 {
		default:
			counts.Count("session.marker.unknown", 1)
			return errors.New(fmt.Sprintf("packet.unknown marker = 0x%02x", marker))
		case 0xfd:
			if _, err = r.Read16(); err != nil {
				return errors.New("packet.read ping time")
			}
		case 0xf9:
		}
	}

	msglist := list.New()
	for r.Len() != 0 {
		if msg, err := rtmfp.ParseRequestMessage(r); err != nil {
			if err != rtmfp.EOP {
				return err
			}
			break
		} else {
			msglist.PushBack(msg)
		}
	}

	var lastreq *flowRequest = nil
	for e := msglist.Front(); e != nil; e = e.Next() {
		msg := e.Value.(*rtmfp.RequestMessage)
		if msg.Code != 0x11 && lastreq != nil {
			if err := s.handleFlowRequest(lastreq); err != nil {
				return err
			}
			lastreq = nil
		}
		switch msg.Code {
		default:
			s.Close()
			counts.Count("session.code.unknown", 1)
			return errors.New(fmt.Sprintf("message.close code = 0x%02x", msg.Code))
		case 0x4c:
			s.Close()
			counts.Count("session.code.close", 1)
			return nil
		case 0x01:
			s.send(newKeepAliveResponse(true))
		case 0x41:
		case 0x5e:
			if req, err := parseFlowErrorRequest(msg.PacketReader); err != nil {
				counts.Count("session.parse5e.error", 1)
				return err
			} else if fw := s.writers[req.fid]; fw != nil {
				fw.reader.handler.OnClose()
			} else {
				xlog.OutLog.Printf("[session]: xid = %d, writer.fid = %d, flow not found 0x5e\n", s.xid, req.fid)
			}
		case 0x51:
			if req, err := parseFlowAckRequest(msg.PacketReader); err != nil {
				counts.Count("session.parse51.error", 1)
				return err
			} else if fw := s.writers[req.fid]; fw != nil {
				fw.CommitAck(req.cnt, req.ack)
			} else {
				xlog.OutLog.Printf("[session]: xid = %d, writer.fid = %d, flow not found 0x51\n", s.xid, req.fid)
			}
		case 0x10:
			if req, err := parseFlowRequest(msg.PacketReader); err != nil {
				counts.Count("session.parse10.error", 1)
				return err
			} else {
				lastreq = req
			}
		case 0x11:
			if req, err := parseFlowRequestSlice(msg.PacketReader); err != nil {
				counts.Count("session.parse11.error", 1)
				return err
			} else if lastreq != nil {
				lastreq.AddSlice(req)
			} else {
				xlog.OutLog.Printf("[session]: xid = %d, not following message\n", s.xid)
			}
		}
	}
	if lastreq != nil {
		return s.handleFlowRequest(lastreq)
	}
	return nil
}