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https://github.com/slackhq/nebula.git
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ee7c27093c
This change adds an index based on HostInfo.remoteIndexId. This allows
us to use HostMap.QueryReverseIndex without having to loop over all
entries in the map (this can be a bottleneck under high traffic
lighthouses).
Without this patch, a high traffic lighthouse server receiving recv_error
packets and lots of handshakes, cpu pprof trace can look like this:
flat flat% sum% cum cum%
2000ms 32.26% 32.26% 3040ms 49.03% github.com/slackhq/nebula.(*HostMap).QueryReverseIndex
870ms 14.03% 46.29% 1060ms 17.10% runtime.mapiternext
Which shows 50% of total cpu time is being spent in QueryReverseIndex.
36 lines
1019 B
Go
36 lines
1019 B
Go
package nebula
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const (
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handshakeIXPSK0 = 0
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handshakeXXPSK0 = 1
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)
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func HandleIncomingHandshake(f *Interface, addr *udpAddr, packet []byte, h *Header, hostinfo *HostInfo) {
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newHostinfo, _ := f.handshakeManager.QueryIndex(h.RemoteIndex)
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//TODO: For stage 1 we won't have hostinfo yet but stage 2 and above would require it, this check may be helpful in those cases
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//if err != nil {
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// l.WithError(err).WithField("udpAddr", addr).Error("Error while finding host info for handshake message")
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// return
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//}
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if !f.lightHouse.remoteAllowList.Allow(udp2ipInt(addr)) {
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l.WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
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return
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}
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tearDown := false
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switch h.Subtype {
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case handshakeIXPSK0:
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switch h.MessageCounter {
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case 1:
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tearDown = ixHandshakeStage1(f, addr, newHostinfo, packet, h)
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case 2:
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tearDown = ixHandshakeStage2(f, addr, newHostinfo, packet, h)
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}
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}
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if tearDown && newHostinfo != nil {
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f.handshakeManager.DeleteHostInfo(newHostinfo)
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}
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}
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