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remove old switch lookup functions

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This commit is contained in:
Arceliar 2020-05-30 13:12:49 -05:00
parent 0f28862e99
commit c83b070c69
1 changed files with 0 additions and 69 deletions
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69
src/yggdrasil/switch.go
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@ -611,38 +611,6 @@ func (t *lookupTable) _insert(elem *tableElem) {
}
}
// This is called via a sync.Once to update the atomically readable subset of switch information that gets used for routing decisions.
func (t *switchTable) old_updateTable() {
// WARNING this should only be called from within t.data.updater.Do()
// It relies on the sync.Once for synchronization with messages and lookups
// TODO use a pre-computed faster lookup table
// Instead of checking distance for every destination every time
// Array of structs, indexed by first coord that differs from self
// Each struct has stores the best port to forward to, and a next coord map
// Move to struct, then iterate over coord maps until you dead end
// The last port before the dead end should be the closest
newTable := lookupTable{
self: t.data.locator.clone(),
elems: make(map[switchPort]tableElem, len(t.data.peers)),
}
for _, pinfo := range t.data.peers {
//if !pinfo.forward { continue }
if pinfo.locator.root != newTable.self.root {
continue
}
loc := pinfo.locator.clone()
loc.coords = loc.coords[:len(loc.coords)-1] // Remove the them->self link
newTable.elems[pinfo.port] = tableElem{
locator: loc,
port: pinfo.port,
time: pinfo.time,
}
}
newTable._msg = *t._getMsg()
t.core.peers.updateTables(t, &newTable)
t.core.router.updateTable(t, &newTable)
}
// Starts the switch worker
func (t *switchTable) start() error {
t.core.log.Infoln("Starting switch")
@ -664,40 +632,3 @@ func (t *lookupTable) lookup(coords []byte) switchPort {
}
return here.port
}
// Find the best port to forward to for a given set of coords
func (t *lookupTable) old_lookup(coords []byte) switchPort {
var bestPort switchPort
myDist := t.self.dist(coords)
bestDist := myDist
var bestElem tableElem
for _, info := range t.elems {
dist := info.locator.dist(coords)
if dist >= myDist {
continue
}
var update bool
switch {
case dist < bestDist:
// Closer to destination
update = true
case dist > bestDist:
// Further from destination
case info.locator.tstamp > bestElem.locator.tstamp:
// Newer root update
update = true
case info.locator.tstamp < bestElem.locator.tstamp:
// Older root update
case info.time.Before(bestElem.time):
// Received root update via this peer sooner
update = true
default:
}
if update {
bestPort = info.port
bestDist = dist
bestElem = info
}
}
return bestPort
}