func parseHelloRequest(r *xio.PacketReader) (*helloRequest, error) {
var err error
if _, err = r.Read8(); err != nil {
return nil, errors.New("hello.read ignore")
}
size := uint8(0)
if size, err = r.Read8(); err != nil {
return nil, errors.New("hello.read epd.len")
} else if size <= 1 {
return nil, errors.New("hello.too small epd.len")
} else {
size--
if int(size) > r.Len() {
return nil, errors.New("hello.too big epd.len")
}
}
mode := uint8(0)
if mode, err = r.Read8(); err != nil {
return nil, errors.New("hello.read mode")
}
epd := make([]byte, int(size))
if err = r.ReadBytes(epd); err != nil {
return nil, errors.New("hello.read epd")
}
tag := make([]byte, 16)
if err = r.ReadBytes(tag); err != nil {
return nil, errors.New("hello.read tag")
}
return &helloRequest{epd, tag, mode}, nil
}
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
}
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
}
}
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
}
}
func parseAssignRequest(r *xio.PacketReader) (*assignRequest, error) {
var err error
yid := uint32(0)
if yid, err = r.Read32(); err != nil {
return nil, errors.New("assign.read yid")
}
coolen := uint64(0)
if coolen, err = r.Read7BitValue64(); err != nil {
return nil, errors.New("assign.read cookie.len")
} else if coolen != cookies.CookieSize {
return nil, errors.New("assign.bad cookie.len")
}
coobuf := make([]byte, cookies.CookieSize)
if err = r.ReadBytes(coobuf); err != nil {
return nil, errors.New("assign.read cookie.value")
}
size := uint64(0)
if size, err = r.Read7BitValue64(); err != nil {
return nil, errors.New("assign.read pid.size")
} else if size == 0 || size > uint64(r.Len()) {
return nil, errors.New("assign.bad pid.size")
}
pid := sha256.Sum256(r.Bytes()[:size])
if len(pid) != 0x20 {
return nil, errors.New("assign.bad pid.len")
}
if size, err = r.Read7BitValue64(); err != nil {
return nil, errors.New("assign.read pubkey.len")
} else if size <= 2 {
return nil, errors.New("assign.too small pubkey.len")
} else {
size -= 2
if size > uint64(r.Len()) {
return nil, errors.New("assign.too big pubkey.len")
}
if err := r.Skip(2); err != nil {
return nil, errors.New("assign.skip useless")
}
}
pubkey := make([]byte, int(size))
if err = r.ReadBytes(pubkey); err != nil {
return nil, errors.New("assign.read pubkey")
}
if size, err = r.Read7BitValue64(); err != nil {
return nil, errors.New("assign.read initiator.len")
} else if size == 0 || size > uint64(r.Len()) {
return nil, errors.New("assign.bad initiator.len")
}
initiator := make([]byte, int(size))
if err = r.ReadBytes(initiator); err != nil {
return nil, errors.New("assign.read initiator")
}
return &assignRequest{yid, string(pid[:]), coobuf, pubkey, initiator}, nil
}
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
}