dark/zerotiertspu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improved path selection, more efficient traffic allocation, lower QoS/ACK overhead

Browse source
This commit is contained in:
Joseph Henry 2018-06-22 16:30:20 -07:00
parent 52264d5e28
commit bdcdccfcc3
7 changed files with 143 additions and 91 deletions
Download patch file Download diff file Expand all files Collapse all files

36
node/Peer.hpp
View file

@ -203,12 +203,12 @@ public:
/**
* @return The aggregate link Packet Delay Variance (PDV)
*/
float computeAggregateLinkPacketDelayVariance();
int computeAggregateLinkPacketDelayVariance();
/**
* @return The aggregate link mean latency
*/
float computeAggregateLinkMeanLatency();
int computeAggregateLinkMeanLatency();
/**
* @return The number of currently alive "physical" paths in the aggregate link
@ -357,7 +357,7 @@ public:
*/
inline unsigned int latency(const int64_t now)
{
if (RR->node->getMultipathMode()) {
if (_canUseMultipath) {
return (int)computeAggregateLinkMeanLatency();
} else {
SharedPtr<Path> bp(getAppropriatePath(now,false));
@ -417,6 +417,14 @@ public:
inline bool remoteVersionKnown() const { return ((_vMajor > 0)||(_vMinor > 0)||(_vRevision > 0)); }
/**
* Periodically update known multipath activation constraints. This is done so that we know when and when
* not to use multipath logic. Doing this once every few seconds is sufficient.
*
* @param now Current time
*/
inline void processBackgroundPeerTasks(int64_t now);
/**
* Record that the remote peer does have multipath enabled. As is evident by the receipt of a VERB_ACK
* or a VERB_QOS_MEASUREMENT packet at some point in the past. Until this flag is set, the local client
@ -427,18 +435,18 @@ public:
/**
* @return Whether the local client supports and is configured to use multipath
*/
inline bool localMultipathSupport() { return ((RR->node->getMultipathMode() != ZT_MULTIPATH_NONE) && (ZT_PROTO_VERSION > 9)); }
inline bool localMultipathSupport() { return _localMultipathSupported; }
/**
* @return Whether the remote peer supports and is configured to use multipath
*/
inline bool remoteMultipathSupport() { return (_remotePeerMultipathEnabled && (_vProto > 9)); }
inline bool remoteMultipathSupport() { return _remoteMultipathSupported; }
/**
* @return Whether this client can use multipath to communicate with this peer. True if both peers are using
* the correct protocol and if both peers have multipath enabled. False if otherwise.
*/
inline bool canUseMultipath() { return (localMultipathSupport() && remoteMultipathSupport()); }
inline bool canUseMultipath() { return _canUseMultipath; }
/**
* @return True if peer has received a trust established packet (e.g. common network membership) in the past ZT_TRUST_EXPIRATION ms
@ -557,6 +565,13 @@ public:
return (_QoSCutoffCount < ZT_PATH_QOS_ACK_CUTOFF_LIMIT);
}
/**
* @return Whether this peer is reachable via an aggregate link
*/
inline bool hasAggregateLink() {
return _localMultipathSupported && _remoteMultipathSupported && _remotePeerMultipathEnabled;
}
/**
* Serialize a peer for storage in local cache
*
@ -658,6 +673,15 @@ private:
int64_t _lastPathPrune;
int64_t _lastACKWindowReset;
int64_t _lastQoSWindowReset;
int64_t _lastMultipathCompatibilityCheck;
unsigned char _freeRandomByte;
int _uniqueAlivePathCount;
bool _localMultipathSupported;
bool _remoteMultipathSupported;
bool _canUseMultipath;
uint16_t _vProto;
uint16_t _vMajor;