Exemple #1
0
func open() *bgp.BGPMessage {
	p1 := bgp.NewOptionParameterCapability(
		[]bgp.ParameterCapabilityInterface{bgp.NewCapRouteRefresh()})
	p2 := bgp.NewOptionParameterCapability(
		[]bgp.ParameterCapabilityInterface{bgp.NewCapMultiProtocol(bgp.RF_IPv4_UC)})
	g := &bgp.CapGracefulRestartTuple{4, 2, 3}
	p3 := bgp.NewOptionParameterCapability(
		[]bgp.ParameterCapabilityInterface{bgp.NewCapGracefulRestart(true, 100,
			[]*bgp.CapGracefulRestartTuple{g})})
	p4 := bgp.NewOptionParameterCapability(
		[]bgp.ParameterCapabilityInterface{bgp.NewCapFourOctetASNumber(100000)})
	return bgp.NewBGPOpenMessage(11033, 303, "100.4.10.3",
		[]bgp.OptionParameterInterface{p1, p2, p3, p4})
}
Exemple #2
0
func capabilitiesFromConfig(pConf *config.Neighbor) []bgp.ParameterCapabilityInterface {
	caps := make([]bgp.ParameterCapabilityInterface, 0, 4)
	caps = append(caps, bgp.NewCapRouteRefresh())
	for _, rf := range pConf.AfiSafis {
		family, _ := bgp.GetRouteFamily(string(rf.Config.AfiSafiName))
		caps = append(caps, bgp.NewCapMultiProtocol(family))
	}
	caps = append(caps, bgp.NewCapFourOctetASNumber(pConf.Config.LocalAs))

	if c := pConf.GracefulRestart.Config; c.Enabled {
		tuples := []*bgp.CapGracefulRestartTuple{}
		ltuples := []*bgp.CapLongLivedGracefulRestartTuple{}

		// RFC 4724 4.1
		// To re-establish the session with its peer, the Restarting Speaker
		// MUST set the "Restart State" bit in the Graceful Restart Capability
		// of the OPEN message.
		restarting := pConf.GracefulRestart.State.LocalRestarting

		if !c.HelperOnly {
			for i, rf := range pConf.AfiSafis {
				k, _ := bgp.GetRouteFamily(string(rf.Config.AfiSafiName))
				if m := rf.MpGracefulRestart.Config; m.Enabled {
					// When restarting, always flag forwaring bit.
					// This can be a lie, depending on how gobgpd is used.
					// For a route-server use-case, since a route-server
					// itself doesn't forward packets, and the dataplane
					// is a l2 switch which continues to work with no
					// relation to bgpd, this behavior is ok.
					// TODO consideration of other use-cases
					tuples = append(tuples, bgp.NewCapGracefulRestartTuple(k, restarting))
					pConf.AfiSafis[i].MpGracefulRestart.State.Advertised = true
				}
				if m := rf.LongLivedGracefulRestart.Config; m.Enabled {
					ltuples = append(ltuples, bgp.NewCapLongLivedGracefulRestartTuple(k, restarting, m.RestartTime))
				}
			}
		}
		time := c.RestartTime
		notification := c.NotificationEnabled
		caps = append(caps, bgp.NewCapGracefulRestart(restarting, notification, time, tuples))
		if c.LongLivedEnabled {
			caps = append(caps, bgp.NewCapLongLivedGracefulRestart(ltuples))
		}
	}
	return caps
}