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constant space searches that should play nicer if searching for an unreachable destination
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parent
201dbec63d
commit
8513f8f4dc
@ -37,7 +37,7 @@ type searchInfo struct {
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mask crypto.NodeID
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time time.Time
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toVisit []*dhtInfo
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visited map[crypto.NodeID]bool
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visited crypto.NodeID // Closest address visited so far
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callback func(*sessionInfo, error)
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// TODO context.Context for timeout and cancellation
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}
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@ -93,12 +93,16 @@ func (sinfo *searchInfo) handleDHTRes(res *dhtRes) {
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func (sinfo *searchInfo) addToSearch(res *dhtRes) {
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// Add responses to toVisit if closer to dest than the res node
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from := dhtInfo{key: res.Key, coords: res.Coords}
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sinfo.visited[*from.getNodeID()] = true
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if dht_ordered(&sinfo.dest, from.getNodeID(), &sinfo.visited) {
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// Closer to the destination, so update visited
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sinfo.visited = *from.getNodeID()
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}
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for _, info := range res.Infos {
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if *info.getNodeID() == sinfo.searches.router.dht.nodeID || sinfo.visited[*info.getNodeID()] {
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if *info.getNodeID() == sinfo.visited {
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// dht_ordered could return true here, but we want to skip it in this case
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continue
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}
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if dht_ordered(&sinfo.dest, info.getNodeID(), from.getNodeID()) {
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if dht_ordered(&sinfo.dest, info.getNodeID(), &sinfo.visited) {
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// Response is closer to the destination
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sinfo.toVisit = append(sinfo.toVisit, info)
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}
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@ -148,7 +152,7 @@ func (sinfo *searchInfo) continueSearch() {
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// Calls create search, and initializes the iterative search parts of the struct before returning it.
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func (s *searches) newIterSearch(dest *crypto.NodeID, mask *crypto.NodeID, callback func(*sessionInfo, error)) *searchInfo {
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sinfo := s.createSearch(dest, mask, callback)
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sinfo.visited = make(map[crypto.NodeID]bool)
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sinfo.visited = s.router.dht.nodeID
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loc := s.router.core.switchTable.getLocator()
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sinfo.toVisit = append(sinfo.toVisit, &dhtInfo{
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key: s.router.core.boxPub,
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