diff options
Diffstat (limited to 'node/Peer.hpp')
| -rw-r--r-- | node/Peer.hpp | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/node/Peer.hpp b/node/Peer.hpp index ad4c6746..a70d9868 100644 --- a/node/Peer.hpp +++ b/node/Peer.hpp @@ -236,15 +236,33 @@ public: inline uint64_t activelyTransferringFrames(uint64_t now) const throw() { return ((now - lastFrame()) < ZT_PEER_ACTIVITY_TIMEOUT); } /** - * @return Current latency or 0 if unknown (max: 65535) + * @return Latency in milliseconds or 0 if unknown */ - inline unsigned int latency() const - throw() + inline unsigned int latency() const { return _latency; } + + /** + * This computes a quality score for relays and root servers + * + * If we haven't heard anything from these in ZT_PEER_ACTIVITY_TIMEOUT, they + * receive the worst possible quality (max unsigned int). Otherwise the + * quality is a product of latency and the number of potential missed + * pings. This causes roots and relays to switch over a bit faster if they + * fail. + * + * @return Relay quality score computed from latency and other factors, lower is better + */ + inline unsigned int relayQuality(const uint64_t now) const { + const uint64_t tsr = now - _lastReceive; + if (tsr >= ZT_PEER_ACTIVITY_TIMEOUT) + return (~(unsigned int)0); unsigned int l = _latency; - return std::min(l,(unsigned int)65535); + if (!l) + l = 0xffff; + return (l * (((unsigned int)tsr / (ZT_PEER_DIRECT_PING_DELAY + 1000)) + 1)); } + /** * Update latency with a new direct measurment * |