// Sends an OpenFlow message to s, and returns a channel to receive
// a response on. Any error encountered during the send except io.EOF
// is returned.
func (s *OFSwitch) SendAndReceive(msg ofp10.Packet) chan ofp10.Msg {
ch := make(chan ofp10.Msg)
s.reqsMu.Lock()
s.reqs[msg.GetHeader().XID] = ch
s.reqsMu.Unlock()
s.Send(msg)
return ch
}
func (s *OFSwitch) distributeMessages(dpid net.HardwareAddr, msg ofp10.Packet) {
header := msg.GetHeader()
s.reqsMu.RLock()
if ch, ok := s.reqs[header.XID]; ok {
m := ofp10.Msg{msg, dpid}
ch <- m
delete(s.reqs, header.XID)
} else {
switch t := msg.(type) {
case *ofp10.SwitchFeatures:
for _, app := range s.appInstance {
if actor, ok := app.(ofp10.SwitchFeaturesReactor); ok {
actor.FeaturesReply(s.DPID(), t)
}
}
case *ofp10.PacketIn:
for _, app := range s.appInstance {
if actor, ok := app.(ofp10.PacketInReactor); ok {
actor.PacketIn(s.DPID(), t)
}
}
case *ofp10.Header:
switch t.GetHeader().Type {
case ofp10.T_ECHO_REPLY:
for _, app := range s.appInstance {
if actor, ok := app.(ofp10.EchoReplyReactor); ok {
actor.EchoReply(s.DPID())
}
}
case ofp10.T_ECHO_REQUEST:
for _, app := range s.appInstance {
if actor, ok := app.(ofp10.EchoRequestReactor); ok {
actor.EchoRequest(s.DPID())
}
}
}
}
}
s.reqsMu.RUnlock()
}
func (m *MessageStream) parse(buf []byte) {
var d ofp10.Packet
switch buf[1] {
case ofp10.T_PACKET_IN:
d = new(ofp10.PacketIn)
d.Write(buf)
case ofp10.T_HELLO:
d = new(ofp10.Header)
d.Write(buf)
case ofp10.T_ECHO_REPLY:
d = new(ofp10.Header)
d.Write(buf)
case ofp10.T_ECHO_REQUEST:
d = new(ofp10.Header)
d.Write(buf)
case ofp10.T_ERROR:
d = new(ofp10.ErrorMsg)
d.Write(buf)
case ofp10.T_VENDOR:
d = new(ofp10.VendorHeader)
d.Write(buf)
case ofp10.T_FEATURES_REPLY:
d = new(ofp10.SwitchFeatures)
d.Write(buf)
case ofp10.T_GET_CONFIG_REPLY:
d = new(ofp10.SwitchConfig)
d.Write(buf)
case ofp10.T_FLOW_REMOVED:
d = new(ofp10.FlowRemoved)
d.Write(buf)
case ofp10.T_PORT_STATUS:
d = new(ofp10.PortStatus)
d.Write(buf)
case ofp10.T_STATS_REPLY:
d = new(ofp10.StatsReply)
d.Write(buf)
case ofp10.T_BARRIER_REPLY:
d = new(ofp10.Header)
d.Write(buf)
default:
// Unrecognized packet do nothing
}
m.Inbound <- d
}