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Rework how paths are set as remote cluster preferred. The code is now clearer and cluster preference indications are now very sticky as they should be.

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This commit is contained in:
Adam Ierymenko 2016-09-06 12:45:28 -07:00
parent 43780742b0
commit 8a2e8bd585
3 changed files with 46 additions and 37 deletions
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43
node/Peer.hpp
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@ -123,11 +123,16 @@ public:
/**
* Set which known path for an address family is optimal
*
* This only modifies paths within the same address family
*
* @param addr Address to make exclusive
*/
void setClusterOptimal(const InetAddress &addr);
inline void setClusterOptimal(const InetAddress &addr)
{
if (addr.ss_family == AF_INET) {
_remoteClusterOptimal4 = (uint32_t)reinterpret_cast<const struct sockaddr_in *>(&addr)->sin_addr.s_addr;
} else if (addr.ss_family == AF_INET6) {
memcpy(_remoteClusterOptimal6,reinterpret_cast<const struct sockaddr_in6 *>(&addr)->sin6_addr.s6_addr,16);
}
}
/**
* Send via best direct path
@ -367,14 +372,30 @@ private:
inline uint64_t _pathScore(const unsigned int p) const
{
return ( _paths[p].lastReceive +
(uint64_t)(_paths[p].path->preferenceRank() * (ZT_PEER_PING_PERIOD / ZT_PATH_MAX_PREFERENCE_RANK)) +
(uint64_t)(_paths[p].clusterWeights * ZT_PEER_PING_PERIOD) );
uint64_t s = ZT_PEER_PING_PERIOD;
if (_paths[p].path->address().ss_family == AF_INET) {
s += _paths[p].lastReceive + (uint64_t)(_paths[p].path->preferenceRank() * (ZT_PEER_PING_PERIOD / ZT_PATH_MAX_PREFERENCE_RANK)) + (uint64_t)(ZT_PEER_PING_PERIOD * (unsigned long)(reinterpret_cast<const struct sockaddr_in *>(&(_paths[p].path->address()))->sin_addr.s_addr == _remoteClusterOptimal4));
} else if (_paths[p].path->address().ss_family == AF_INET6) {
uint64_t clusterWeight = ZT_PEER_PING_PERIOD;
const uint8_t *a = reinterpret_cast<const uint8_t *>(reinterpret_cast<const struct sockaddr_in6 *>(&(_paths[p].path->address()))->sin6_addr.s6_addr);
for(long i=0;i<16;++i) {
if (a[i] != _remoteClusterOptimal6[i]) {
clusterWeight = 0;
break;
}
}
s += _paths[p].lastReceive + (uint64_t)(_paths[p].path->preferenceRank() * (ZT_PEER_PING_PERIOD / ZT_PATH_MAX_PREFERENCE_RANK)) + clusterWeight;
} else {
s += _paths[p].lastReceive + (uint64_t)(_paths[p].path->preferenceRank() * (ZT_PEER_PING_PERIOD / ZT_PATH_MAX_PREFERENCE_RANK));
}
#ifdef ZT_ENABLE_CLUSTER
s -= ZT_PEER_PING_PERIOD * (uint64_t)_paths[p].localClusterSuboptimal;
#endif
return s;
}
unsigned char _key[ZT_PEER_SECRET_KEY_LENGTH];
const RuntimeEnvironment *RR;
uint8_t _remoteClusterOptimal6[16];
uint64_t _lastUsed;
uint64_t _lastReceive; // direct or indirect
uint64_t _lastUnicastFrame;
@ -382,6 +403,8 @@ private:
uint64_t _lastAnnouncedTo;
uint64_t _lastDirectPathPushSent;
uint64_t _lastDirectPathPushReceive;
const RuntimeEnvironment *RR;
uint32_t _remoteClusterOptimal4;
uint16_t _vProto;
uint16_t _vMajor;
uint16_t _vMinor;
@ -390,7 +413,9 @@ private:
struct {
uint64_t lastReceive;
SharedPtr<Path> path;
unsigned int clusterWeights;
#ifdef ZT_ENABLE_CLUSTER
bool localClusterSuboptimal;
#endif
} _paths[ZT_MAX_PEER_NETWORK_PATHS];
Mutex _paths_m;
unsigned int _numPaths;