69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package peer
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import (
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"log"
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"time"
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"vppn/peer/wginterface"
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)
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func (a *App) onStateTick() {
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wgPeers := a.devPeers()
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for _, wgPeer := range wgPeers {
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p, ok := a.peersByKey[wgPeer.PublicKey]
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if !ok {
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log.Printf("Wireguard peer not known. Removing: %v", wgPeer.PublicKey)
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a.devRemove(&Peer{wgPeer: wgPeer})
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continue
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}
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p.wgPeer = wgPeer
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// Log endpoint changes.
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if ep := p.WGEndpoint(); ep != p.EndpointWG {
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log.Printf("Client %s %s endpoint: %s -> %s", p.Name, p.VPNIP, p.EndpointWG, ep)
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p.EndpointWG = ep
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}
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switch p.State {
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case StateRelayed:
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if p.DirectAlive() {
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// We may already have a valid direct endpoint due to wireguard
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// roaming.
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a.devPromote(p)
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} else if ep := p.PreferredEndpoint(); ep.IsValid() {
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// If we have an ep to probe, add it.
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a.devAddProbe(p, ep)
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}
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case StateProbing:
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if time.Since(p.LastHandshakeTime()) < 2*wginterface.ProbeKeepalive {
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// Promote probing peers to direct once alive (direct path confirmed
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// working).
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a.devPromote(p)
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} else if ep := p.PreferredEndpoint(); ep.IsValid() && ep != p.ProbeEndpoint {
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// Re-start probing if we see a new endpoint.
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a.devAddProbe(p, ep)
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} else if time.Since(p.ProbeStart) > 8*wginterface.ProbeKeepalive {
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// Give up probing if we haven't been able to handshake.
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a.devAddRelayed(p)
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}
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case StateDirect:
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if p.IsPublic || a.isPublic || p.Up() {
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break
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}
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// Stale non-public direct peer: demote to relayed and wait for new IP
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// information.
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a.devAddRelayed(p)
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}
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}
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// Ensure we have a live relay (if we're not public).
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if !a.isPublic && (a.relay == nil || !a.relay.Up()) {
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a.switchActiveRelay()
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}
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}
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