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switch bugfixes
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@ -43,6 +43,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
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### Fixed
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- Memory leaks in the DHT fixed
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- Crash where ICMPv6 NDP goroutine would incorrectly start in TUN mode fixed
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- Remove peers from the switch table of they stop sending switch messages but keep the TCP connection alive
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## [0.2.7] - 2018-10-13
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### Added
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@ -208,6 +208,7 @@ func (t *switchTable) doMaintenance() {
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defer t.mutex.Unlock() // Release lock when we're done
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t.cleanRoot()
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t.cleanDropped()
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t.cleanPeers()
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}
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// Updates the root periodically if it is ourself, or promotes ourself to root if we're better than the current root or if the current root has timed out.
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@ -258,11 +259,33 @@ func (t *switchTable) forgetPeer(port switchPort) {
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if port != t.parent {
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return
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}
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t.parent = 0
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for _, info := range t.data.peers {
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t.unlockedHandleMsg(&info.msg, info.port, true)
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}
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}
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// Clean all unresponsive peers from the table, needed in case a peer stops updating.
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// Needed in case a non-parent peer keeps the connection open but stops sending updates.
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// Also reclaims space from deleted peers by copying the map.
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func (t switchTable) cleanPeers() {
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now := time.Now()
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for port, peer := range t.data.peers {
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if now.Sub(peer.time) > switch_timeout+switch_throttle {
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// Longer than switch_timeout to make sure we don't remove a working peer because the root stopped responding.
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delete(t.data.peers, port)
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}
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}
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if _, isIn := t.data.peers[t.parent]; !isIn {
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// The root timestamp would probably time out before this happens, but better safe than sorry.
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// We removed the current parent, so find a new one.
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t.parent = 0
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for _, peer := range t.data.peers {
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t.unlockedHandleMsg(&peer.msg, peer.port, true)
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}
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}
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}
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// Dropped is a list of roots that are better than the current root, but stopped sending new timestamps.
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// If we switch to a new root, and that root is better than an old root that previously timed out, then we can clean up the old dropped root infos.
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// This function is called periodically to do that cleanup.
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@ -379,9 +402,6 @@ func (t *switchTable) unlockedHandleMsg(msg *switchMsg, fromPort switchPort, rep
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if !equiv(&sender.locator, &oldSender.locator) {
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// Reset faster info, we'll start refilling it right after this
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sender.faster = nil
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for _, peer := range t.data.peers {
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delete(peer.faster, sender.port)
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}
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doUpdate = true
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}
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// Update the matrix of peer "faster" thresholds
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