OPNFV’s Third Release Includes Security Enhancements
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snaproute Go BGP Code Dive (11): Moving to Open Confirm
In the last post in this series, we began considering the bgp code that handles the open message that begins moving a new peer to open confirmed state. This is the particular bit of code of interest—
case BGPEventBGPOpen:
st.fsm.StopConnectRetryTimer()
bgpMsg := data.(*packet.BGPMessage)
if st.fsm.ProcessOpenMessage(bgpMsg) {
st.fsm.sendKeepAliveMessage()
st.fsm.StartHoldTimer()
st.fsm.ChangeState(NewOpenConfirmState(st.fsm))
}We looked at how this code assigns the contents of the received packet to bgpMsg; now we need to look at how this information is actually processed. bgpMsg is passed to st.fsm.ProcessOpenMessage() in the next line. This call is preceded by the st.fsm, which means this function is going to be found in the FSM, which means fsm.go. Indeed, func (fsm *FSM) ProcessOpenMessage... is around line 1172 in fsm.go—
func (fsm *FSM) ProcessOpenMessage(pkt *packet.BGPMessage) bool {
body := pkt.Body.(*packet.BGPOpen)
if uint32(body.HoldTime) < fsm.holdTime {
fsm.SetHoldTime(uint32(body.HoldTime), uint32(body.HoldTime/3))
}
if body.MyAS == fsm.Manager.gConf.AS {
fsm.peerType = config.PeerTypeInternal—
} else {
fsm.peerType = config.PeerTypeExternal
}
afiSafiMap := packet.GetProtocolFromOpenMsg(body)
for protoFamily, _ := range afiSafiMap {
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Asynchronous Docker metrics
This article describes how the latest version of the Host sFlow agent is able to track the performance of a rapidly changing population of Docker containers and export a real-time stream of standard sFlow metrics.
The diagram at the beginning of this article shows the sequence of messages, going from top to bottom, required to track a container. The Host sFlow agent first registers for container Continue reading