func (h *nodeLeftHandler) Rcv(msg bh.Msg, ctx bh.RcvContext) error {
n := nom.Node(msg.Data().(nom.NodeLeft))
d := ctx.Dict(nodeDict)
k := string(n.UID())
if _, err := d.Get(k); err != nil {
return fmt.Errorf("%v is not joined", n)
}
d.Del(k)
return nil
}
func (h *nodeJoinedHandler) Rcv(msg bh.Msg, ctx bh.RcvContext) error {
joined := msg.Data().(nom.NodeJoined)
d := ctx.Dict(nodeDict)
n := nom.Node(joined)
k := string(n.UID())
var np nodePortsAndLinks
if v, err := d.Get(k); err != nil {
glog.Warningf("%v rejoins", n)
} else {
np = v.(nodePortsAndLinks)
}
np.N = n
// Add a flow entry to forward arp packets to the controller
mt := nom.Match{}
mt.AddField(nom.EthType(nom.EthTypeARP))
acs := []nom.Action{
nom.ActionSendToController{
MaxLen: 0xffff,
},
}
fe := nom.FlowEntry{
ID: "Discovery-Host-ARP",
Node: n.UID(),
Priority: 0,
Match: mt,
Actions: acs,
}
afe := nom.AddFlowEntry{
Flow: fe,
Subscriber: bh.AppCellKey{
App: ctx.App(),
Key: k,
Dict: nodeDict,
},
}
ctx.Emit(afe)
// Add a flow entry to forward lldp packets to the controller
mt = nom.Match{}
mt.AddField(nom.EthType(nom.EthTypeLLDP))
acs = []nom.Action{
nom.ActionSendToController{
MaxLen: 0xffff,
},
}
fe = nom.FlowEntry{
ID: "Discovery-Topo-LLDP",
Node: n.UID(),
Priority: 0,
Match: mt,
Actions: acs,
}
afe = nom.AddFlowEntry{
Flow: fe,
Subscriber: bh.AppCellKey{
App: ctx.App(),
Key: k,
Dict: nodeDict,
},
}
ctx.Emit(afe)
return d.Put(k, np)
}
func (h *nodeLeftHandler) Map(msg bh.Msg, ctx bh.MapContext) bh.MappedCells {
return bh.MappedCells{
{nodeDict, string(nom.Node(msg.Data().(nom.NodeLeft)).UID())},
}
}