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switch bugfixes

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This commit is contained in:
Arceliar 2018-12-05 18:22:39 -06:00
parent dd6a1dfccc
commit fe772dd38e
2 changed files with 24 additions and 3 deletions
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1
CHANGELOG.md
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@ -43,6 +43,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
### Fixed ### Fixed
- Memory leaks in the DHT fixed - Memory leaks in the DHT fixed
- Crash where ICMPv6 NDP goroutine would incorrectly start in TUN mode fixed - Crash where ICMPv6 NDP goroutine would incorrectly start in TUN mode fixed
- Remove peers from the switch table of they stop sending switch messages but keep the TCP connection alive
## [0.2.7] - 2018-10-13 ## [0.2.7] - 2018-10-13
### Added ### Added

26
src/yggdrasil/switch.go
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@ -208,6 +208,7 @@ func (t *switchTable) doMaintenance() {
defer t.mutex.Unlock() // Release lock when we're done defer t.mutex.Unlock() // Release lock when we're done
t.cleanRoot() t.cleanRoot()
t.cleanDropped() t.cleanDropped()
t.cleanPeers()
} }
// 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. // 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.
@ -258,11 +259,33 @@ func (t *switchTable) forgetPeer(port switchPort) {
if port != t.parent { if port != t.parent {
return return
} }
t.parent = 0
for _, info := range t.data.peers { for _, info := range t.data.peers {
t.unlockedHandleMsg(&info.msg, info.port, true) t.unlockedHandleMsg(&info.msg, info.port, true)
} }
} }
// Clean all unresponsive peers from the table, needed in case a peer stops updating.
// Needed in case a non-parent peer keeps the connection open but stops sending updates.
// Also reclaims space from deleted peers by copying the map.
func (t switchTable) cleanPeers() {
now := time.Now()
for port, peer := range t.data.peers {
if now.Sub(peer.time) > switch_timeout+switch_throttle {
// Longer than switch_timeout to make sure we don't remove a working peer because the root stopped responding.
delete(t.data.peers, port)
}
}
if _, isIn := t.data.peers[t.parent]; !isIn {
// The root timestamp would probably time out before this happens, but better safe than sorry.
// We removed the current parent, so find a new one.
t.parent = 0
for _, peer := range t.data.peers {
t.unlockedHandleMsg(&peer.msg, peer.port, true)
}
}
}
// Dropped is a list of roots that are better than the current root, but stopped sending new timestamps. // Dropped is a list of roots that are better than the current root, but stopped sending new timestamps.
// 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. // 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.
// This function is called periodically to do that cleanup. // This function is called periodically to do that cleanup.
@ -379,9 +402,6 @@ func (t *switchTable) unlockedHandleMsg(msg *switchMsg, fromPort switchPort, rep
if !equiv(&sender.locator, &oldSender.locator) { if !equiv(&sender.locator, &oldSender.locator) {
// Reset faster info, we'll start refilling it right after this // Reset faster info, we'll start refilling it right after this
sender.faster = nil sender.faster = nil
for _, peer := range t.data.peers {
delete(peer.faster, sender.port)
}
doUpdate = true doUpdate = true
} }
// Update the matrix of peer "faster" thresholds // Update the matrix of peer "faster" thresholds