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-rw-r--r--node/Peer.cpp495
1 files changed, 333 insertions, 162 deletions
diff --git a/node/Peer.cpp b/node/Peer.cpp
index c27afa8f..f0f43399 100644
--- a/node/Peer.cpp
+++ b/node/Peer.cpp
@@ -34,11 +34,18 @@
#include "Network.hpp"
#include "AntiRecursion.hpp"
#include "SelfAwareness.hpp"
+#include "Cluster.hpp"
+#include "Packet.hpp"
#include <algorithm>
+#define ZT_PEER_PATH_SORT_INTERVAL 5000
+
namespace ZeroTier {
+// Used to send varying values for NAT keepalive
+static uint32_t _natKeepaliveBuf = 0;
+
Peer::Peer(const Identity &myIdentity,const Identity &peerIdentity)
throw(std::runtime_error) :
_lastUsed(0),
@@ -47,13 +54,19 @@ Peer::Peer(const Identity &myIdentity,const Identity &peerIdentity)
_lastMulticastFrame(0),
_lastAnnouncedTo(0),
_lastPathConfirmationSent(0),
- _lastDirectPathPush(0),
+ _lastDirectPathPushSent(0),
+ _lastDirectPathPushReceive(0),
+ _lastPathSort(0),
+ _vProto(0),
_vMajor(0),
_vMinor(0),
_vRevision(0),
_id(peerIdentity),
_numPaths(0),
- _latency(0)
+ _latency(0),
+ _directPathPushCutoffCount(0),
+ _networkComs(4),
+ _lastPushedComs(4)
{
if (!myIdentity.agree(peerIdentity,_key,ZT_PEER_SECRET_KEY_LENGTH))
throw std::runtime_error("new peer identity key agreement failed");
@@ -61,6 +74,7 @@ Peer::Peer(const Identity &myIdentity,const Identity &peerIdentity)
void Peer::received(
const RuntimeEnvironment *RR,
+ const InetAddress &localAddr,
const InetAddress &remoteAddr,
unsigned int hops,
uint64_t packetId,
@@ -68,47 +82,118 @@ void Peer::received(
uint64_t inRePacketId,
Packet::Verb inReVerb)
{
+#ifdef ZT_ENABLE_CLUSTER
+ bool suboptimalPath = false;
+ if ((RR->cluster)&&(hops == 0)) {
+ // Note: findBetterEndpoint() is first since we still want to check
+ // for a better endpoint even if we don't actually send a redirect.
+ InetAddress redirectTo;
+ if ( (RR->cluster->findBetterEndpoint(redirectTo,_id.address(),remoteAddr,false)) && (verb != Packet::VERB_OK)&&(verb != Packet::VERB_ERROR)&&(verb != Packet::VERB_RENDEZVOUS)&&(verb != Packet::VERB_PUSH_DIRECT_PATHS) ) {
+ if (_vProto >= 5) {
+ // For newer peers we can send a more idiomatic verb: PUSH_DIRECT_PATHS.
+ Packet outp(_id.address(),RR->identity.address(),Packet::VERB_PUSH_DIRECT_PATHS);
+ outp.append((uint16_t)1); // count == 1
+ outp.append((uint8_t)0); // no flags
+ outp.append((uint16_t)0); // no extensions
+ if (redirectTo.ss_family == AF_INET) {
+ outp.append((uint8_t)4);
+ outp.append((uint8_t)6);
+ outp.append(redirectTo.rawIpData(),4);
+ } else {
+ outp.append((uint8_t)6);
+ outp.append((uint8_t)18);
+ outp.append(redirectTo.rawIpData(),16);
+ }
+ outp.append((uint16_t)redirectTo.port());
+ outp.armor(_key,true);
+ RR->antiRec->logOutgoingZT(outp.data(),outp.size());
+ RR->node->putPacket(localAddr,remoteAddr,outp.data(),outp.size());
+ } else {
+ // For older peers we use RENDEZVOUS to coax them into contacting us elsewhere.
+ Packet outp(_id.address(),RR->identity.address(),Packet::VERB_RENDEZVOUS);
+ outp.append((uint8_t)0); // no flags
+ RR->identity.address().appendTo(outp);
+ outp.append((uint16_t)redirectTo.port());
+ if (redirectTo.ss_family == AF_INET) {
+ outp.append((uint8_t)4);
+ outp.append(redirectTo.rawIpData(),4);
+ } else {
+ outp.append((uint8_t)16);
+ outp.append(redirectTo.rawIpData(),16);
+ }
+ outp.armor(_key,true);
+ RR->antiRec->logOutgoingZT(outp.data(),outp.size());
+ RR->node->putPacket(localAddr,remoteAddr,outp.data(),outp.size());
+ }
+ suboptimalPath = true;
+ }
+ }
+#endif
+
const uint64_t now = RR->node->now();
- _lastReceive = now;
+ bool needMulticastGroupAnnounce = false;
+ bool pathIsConfirmed = false;
- if (!hops) {
- bool pathIsConfirmed = false;
+ { // begin _lock
+ Mutex::Lock _l(_lock);
- /* Learn new paths from direct (hops == 0) packets */
- {
+ _lastReceive = now;
+ if ((verb == Packet::VERB_FRAME)||(verb == Packet::VERB_EXT_FRAME))
+ _lastUnicastFrame = now;
+ else if (verb == Packet::VERB_MULTICAST_FRAME)
+ _lastMulticastFrame = now;
+
+ if ((now - _lastAnnouncedTo) >= ((ZT_MULTICAST_LIKE_EXPIRE / 2) - 1000)) {
+ _lastAnnouncedTo = now;
+ needMulticastGroupAnnounce = true;
+ }
+
+ if (hops == 0) {
unsigned int np = _numPaths;
for(unsigned int p=0;p<np;++p) {
- if (_paths[p].address() == remoteAddr) {
+ if ((_paths[p].address() == remoteAddr)&&(_paths[p].localAddress() == localAddr)) {
_paths[p].received(now);
+#ifdef ZT_ENABLE_CLUSTER
+ _paths[p].setClusterSuboptimal(suboptimalPath);
+#endif
pathIsConfirmed = true;
break;
}
}
if (!pathIsConfirmed) {
- if ((verb == Packet::VERB_OK)&&(inReVerb == Packet::VERB_HELLO)) {
- // Learn paths if they've been confirmed via a HELLO
- RemotePath *slot = (RemotePath *)0;
- if (np < ZT1_MAX_PEER_NETWORK_PATHS) {
- // Add new path
+ if (verb == Packet::VERB_OK) {
+
+ Path *slot = (Path *)0;
+ if (np < ZT_MAX_PEER_NETWORK_PATHS) {
slot = &(_paths[np++]);
} else {
- // Replace oldest non-fixed path
uint64_t slotLRmin = 0xffffffffffffffffULL;
- for(unsigned int p=0;p<ZT1_MAX_PEER_NETWORK_PATHS;++p) {
- if ((!_paths[p].fixed())&&(_paths[p].lastReceived() <= slotLRmin)) {
+ for(unsigned int p=0;p<ZT_MAX_PEER_NETWORK_PATHS;++p) {
+ if (_paths[p].lastReceived() <= slotLRmin) {
slotLRmin = _paths[p].lastReceived();
slot = &(_paths[p]);
}
}
}
if (slot) {
- *slot = RemotePath(remoteAddr,false);
+ *slot = Path(localAddr,remoteAddr);
slot->received(now);
+#ifdef ZT_ENABLE_CLUSTER
+ slot->setClusterSuboptimal(suboptimalPath);
+#endif
_numPaths = np;
pathIsConfirmed = true;
+ _sortPaths(now);
}
+
+#ifdef ZT_ENABLE_CLUSTER
+ if (RR->cluster)
+ RR->cluster->broadcastHavePeer(_id);
+#endif
+
} else {
+
/* If this path is not known, send a HELLO. We don't learn
* paths without confirming that a bidirectional link is in
* fact present, but any packet that decodes and authenticates
@@ -116,134 +201,101 @@ void Peer::received(
if ((now - _lastPathConfirmationSent) >= ZT_MIN_PATH_CONFIRMATION_INTERVAL) {
_lastPathConfirmationSent = now;
TRACE("got %s via unknown path %s(%s), confirming...",Packet::verbString(verb),_id.address().toString().c_str(),remoteAddr.toString().c_str());
- attemptToContactAt(RR,remoteAddr,now);
+ sendHELLO(RR,localAddr,remoteAddr,now);
}
- }
- }
- }
- /* Announce multicast groups of interest to direct peers if they are
- * considered authorized members of a given network. Also announce to
- * root servers and network controllers. */
- if ((pathIsConfirmed)&&((now - _lastAnnouncedTo) >= ((ZT_MULTICAST_LIKE_EXPIRE / 2) - 1000))) {
- _lastAnnouncedTo = now;
-
- const bool isRoot = RR->topology->isRoot(_id);
-
- Packet outp(_id.address(),RR->identity.address(),Packet::VERB_MULTICAST_LIKE);
- const std::vector< SharedPtr<Network> > networks(RR->node->allNetworks());
- for(std::vector< SharedPtr<Network> >::const_iterator n(networks.begin());n!=networks.end();++n) {
- if ( (isRoot) || ((*n)->isAllowed(_id.address())) || (_id.address() == (*n)->controller()) ) {
- const std::vector<MulticastGroup> mgs((*n)->allMulticastGroups());
- for(std::vector<MulticastGroup>::const_iterator mg(mgs.begin());mg!=mgs.end();++mg) {
- if ((outp.size() + 18) > ZT_UDP_DEFAULT_PAYLOAD_MTU) {
- outp.armor(_key,true);
- RR->node->putPacket(remoteAddr,outp.data(),outp.size());
- outp.reset(_id.address(),RR->identity.address(),Packet::VERB_MULTICAST_LIKE);
- }
-
- // network ID, MAC, ADI
- outp.append((uint64_t)(*n)->id());
- mg->mac().appendTo(outp);
- outp.append((uint32_t)mg->adi());
- }
}
}
- if (outp.size() > ZT_PROTO_MIN_PACKET_LENGTH) {
- outp.armor(_key,true);
- RR->node->putPacket(remoteAddr,outp.data(),outp.size());
- }
}
- }
-
- if ((verb == Packet::VERB_FRAME)||(verb == Packet::VERB_EXT_FRAME))
- _lastUnicastFrame = now;
- else if (verb == Packet::VERB_MULTICAST_FRAME)
- _lastMulticastFrame = now;
-}
+ } // end _lock
-RemotePath *Peer::getBestPath(uint64_t now)
-{
- RemotePath *bestPath = (RemotePath *)0;
- uint64_t lrMax = 0;
- int rank = 0;
- for(unsigned int p=0,np=_numPaths;p<np;++p) {
- if ( (_paths[p].active(now)) && ((_paths[p].lastReceived() >= lrMax)||(_paths[p].preferenceRank() >= rank)) ) {
- lrMax = _paths[p].lastReceived();
- rank = _paths[p].preferenceRank();
- bestPath = &(_paths[p]);
- }
+ if (needMulticastGroupAnnounce) {
+ const std::vector< SharedPtr<Network> > networks(RR->node->allNetworks());
+ for(std::vector< SharedPtr<Network> >::const_iterator n(networks.begin());n!=networks.end();++n)
+ (*n)->tryAnnounceMulticastGroupsTo(SharedPtr<Peer>(this));
}
- return bestPath;
}
-void Peer::attemptToContactAt(const RuntimeEnvironment *RR,const InetAddress &atAddress,uint64_t now)
+void Peer::sendHELLO(const RuntimeEnvironment *RR,const InetAddress &localAddr,const InetAddress &atAddress,uint64_t now,unsigned int ttl)
{
+ // _lock not required here since _id is immutable and nothing else is accessed
+
Packet outp(_id.address(),RR->identity.address(),Packet::VERB_HELLO);
outp.append((unsigned char)ZT_PROTO_VERSION);
outp.append((unsigned char)ZEROTIER_ONE_VERSION_MAJOR);
outp.append((unsigned char)ZEROTIER_ONE_VERSION_MINOR);
outp.append((uint16_t)ZEROTIER_ONE_VERSION_REVISION);
outp.append(now);
-
RR->identity.serialize(outp,false);
-
- switch(atAddress.ss_family) {
- case AF_INET:
- outp.append((unsigned char)ZT_PROTO_DEST_ADDRESS_TYPE_IPV4);
- outp.append(atAddress.rawIpData(),4);
- outp.append((uint16_t)atAddress.port());
- break;
- case AF_INET6:
- outp.append((unsigned char)ZT_PROTO_DEST_ADDRESS_TYPE_IPV6);
- outp.append(atAddress.rawIpData(),16);
- outp.append((uint16_t)atAddress.port());
- break;
- default:
- outp.append((unsigned char)ZT_PROTO_DEST_ADDRESS_TYPE_NONE);
- break;
- }
+ atAddress.serialize(outp);
+ outp.append((uint64_t)RR->topology->worldId());
+ outp.append((uint64_t)RR->topology->worldTimestamp());
outp.armor(_key,false); // HELLO is sent in the clear
- RR->node->putPacket(atAddress,outp.data(),outp.size());
+ RR->antiRec->logOutgoingZT(outp.data(),outp.size());
+ RR->node->putPacket(localAddr,atAddress,outp.data(),outp.size(),ttl);
}
-void Peer::doPingAndKeepalive(const RuntimeEnvironment *RR,uint64_t now)
+bool Peer::doPingAndKeepalive(const RuntimeEnvironment *RR,uint64_t now,int inetAddressFamily)
{
- RemotePath *const bestPath = getBestPath(now);
- if (bestPath) {
- if ((now - bestPath->lastReceived()) >= ZT_PEER_DIRECT_PING_DELAY) {
- TRACE("PING %s(%s)",_id.address().toString().c_str(),bestPath->address().toString().c_str());
- attemptToContactAt(RR,bestPath->address(),now);
- bestPath->sent(now);
- } else if (((now - bestPath->lastSend()) >= ZT_NAT_KEEPALIVE_DELAY)&&(!bestPath->reliable())) {
- TRACE("NAT keepalive %s(%s)",_id.address().toString().c_str(),bestPath->address().toString().c_str());
- RR->node->putPacket(bestPath->address(),"",0);
- bestPath->sent(now);
+ Path *p = (Path *)0;
+
+ Mutex::Lock _l(_lock);
+ if (inetAddressFamily != 0) {
+ p = _getBestPath(now,inetAddressFamily);
+ } else {
+ p = _getBestPath(now);
+ }
+
+ if (p) {
+ if ((now - p->lastReceived()) >= ZT_PEER_DIRECT_PING_DELAY) {
+ //TRACE("PING %s(%s) after %llums/%llums send/receive inactivity",_id.address().toString().c_str(),p->address().toString().c_str(),now - p->lastSend(),now - p->lastReceived());
+ sendHELLO(RR,p->localAddress(),p->address(),now);
+ p->sent(now);
+ } else if (((now - p->lastSend()) >= ZT_NAT_KEEPALIVE_DELAY)&&(!p->reliable())) {
+ //TRACE("NAT keepalive %s(%s) after %llums/%llums send/receive inactivity",_id.address().toString().c_str(),p->address().toString().c_str(),now - p->lastSend(),now - p->lastReceived());
+ _natKeepaliveBuf += (uint32_t)((now * 0x9e3779b1) >> 1); // tumble this around to send constantly varying (meaningless) payloads
+ RR->node->putPacket(p->localAddress(),p->address(),&_natKeepaliveBuf,sizeof(_natKeepaliveBuf));
+ p->sent(now);
+ } else {
+ //TRACE("no PING or NAT keepalive: addr==%s reliable==%d %llums/%llums send/receive inactivity",p->address().toString().c_str(),(int)p->reliable(),now - p->lastSend(),now - p->lastReceived());
}
+ return true;
}
+
+ return false;
}
-void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_t now,bool force)
+void Peer::pushDirectPaths(const RuntimeEnvironment *RR,Path *path,uint64_t now,bool force)
{
- if (((now - _lastDirectPathPush) >= ZT_DIRECT_PATH_PUSH_INTERVAL)||(force)) {
- _lastDirectPathPush = now;
+#ifdef ZT_ENABLE_CLUSTER
+ // Cluster mode disables normal PUSH_DIRECT_PATHS in favor of cluster-based peer redirection
+ if (RR->cluster)
+ return;
+#endif
+
+ Mutex::Lock _l(_lock);
- std::vector<Path> dps(RR->node->directPaths());
+ if (((now - _lastDirectPathPushSent) >= ZT_DIRECT_PATH_PUSH_INTERVAL)||(force)) {
+ _lastDirectPathPushSent = now;
+
+ std::vector<InetAddress> dps(RR->node->directPaths());
+ if (dps.empty())
+ return;
#ifdef ZT_TRACE
{
std::string ps;
- for(std::vector<Path>::const_iterator p(dps.begin());p!=dps.end();++p) {
+ for(std::vector<InetAddress>::const_iterator p(dps.begin());p!=dps.end();++p) {
if (ps.length() > 0)
ps.push_back(',');
- ps.append(p->address().toString());
+ ps.append(p->toString());
}
TRACE("pushing %u direct paths to %s: %s",(unsigned int)dps.size(),_id.address().toString().c_str(),ps.c_str());
}
#endif
- std::vector<Path>::const_iterator p(dps.begin());
+ std::vector<InetAddress>::const_iterator p(dps.begin());
while (p != dps.end()) {
Packet outp(_id.address(),RR->identity.address(),Packet::VERB_PUSH_DIRECT_PATHS);
outp.addSize(2); // leave room for count
@@ -251,7 +303,7 @@ void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_
unsigned int count = 0;
while ((p != dps.end())&&((outp.size() + 24) < ZT_PROTO_MAX_PACKET_LENGTH)) {
uint8_t addressType = 4;
- switch(p->address().ss_family) {
+ switch(p->ss_family) {
case AF_INET:
break;
case AF_INET6:
@@ -263,6 +315,7 @@ void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_
}
uint8_t flags = 0;
+ /* TODO: path trust is not implemented yet
switch(p->trust()) {
default:
break;
@@ -273,13 +326,14 @@ void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_
flags |= (0x04 | 0x08); // no encryption, no authentication (redundant but go ahead and set both)
break;
}
+ */
outp.append(flags);
outp.append((uint16_t)0); // no extensions
outp.append(addressType);
outp.append((uint8_t)((addressType == 4) ? 6 : 18));
- outp.append(p->address().rawIpData(),((addressType == 4) ? 4 : 16));
- outp.append((uint16_t)p->address().port());
+ outp.append(p->rawIpData(),((addressType == 4) ? 4 : 16));
+ outp.append((uint16_t)p->port());
++count;
++p;
@@ -294,76 +348,28 @@ void Peer::pushDirectPaths(const RuntimeEnvironment *RR,RemotePath *path,uint64_
}
}
-void Peer::addPath(const RemotePath &newp)
-{
- unsigned int np = _numPaths;
-
- for(unsigned int p=0;p<np;++p) {
- if (_paths[p].address() == newp.address()) {
- _paths[p].setFixed(newp.fixed());
- return;
- }
- }
-
- RemotePath *slot = (RemotePath *)0;
- if (np < ZT1_MAX_PEER_NETWORK_PATHS) {
- // Add new path
- slot = &(_paths[np++]);
- } else {
- // Replace oldest non-fixed path
- uint64_t slotLRmin = 0xffffffffffffffffULL;
- for(unsigned int p=0;p<ZT1_MAX_PEER_NETWORK_PATHS;++p) {
- if ((!_paths[p].fixed())&&(_paths[p].lastReceived() <= slotLRmin)) {
- slotLRmin = _paths[p].lastReceived();
- slot = &(_paths[p]);
- }
- }
- }
- if (slot) {
- *slot = newp;
- _numPaths = np;
- }
-}
-
-void Peer::clearPaths(bool fixedToo)
-{
- if (fixedToo) {
- _numPaths = 0;
- } else {
- unsigned int np = _numPaths;
- unsigned int x = 0;
- unsigned int y = 0;
- while (x < np) {
- if (_paths[x].fixed())
- _paths[y++] = _paths[x];
- ++x;
- }
- _numPaths = y;
- }
-}
-
bool Peer::resetWithinScope(const RuntimeEnvironment *RR,InetAddress::IpScope scope,uint64_t now)
{
+ Mutex::Lock _l(_lock);
unsigned int np = _numPaths;
unsigned int x = 0;
unsigned int y = 0;
while (x < np) {
if (_paths[x].address().ipScope() == scope) {
- if (_paths[x].fixed()) {
- attemptToContactAt(RR,_paths[x].address(),now);
- _paths[y++] = _paths[x]; // keep fixed paths
- }
+ sendHELLO(RR,_paths[x].localAddress(),_paths[x].address(),now);
} else {
- _paths[y++] = _paths[x]; // keep paths not in this scope
+ _paths[y++] = _paths[x];
}
++x;
}
_numPaths = y;
+ _sortPaths(now);
return (y < np);
}
void Peer::getBestActiveAddresses(uint64_t now,InetAddress &v4,InetAddress &v6) const
{
+ Mutex::Lock _l(_lock);
uint64_t bestV4 = 0,bestV6 = 0;
for(unsigned int p=0,np=_numPaths;p<np;++p) {
if (_paths[p].active(now)) {
@@ -385,4 +391,169 @@ void Peer::getBestActiveAddresses(uint64_t now,InetAddress &v4,InetAddress &v6)
}
}
+bool Peer::networkMembershipCertificatesAgree(uint64_t nwid,const CertificateOfMembership &com) const
+{
+ Mutex::Lock _l(_lock);
+ const _NetworkCom *ourCom = _networkComs.get(nwid);
+ if (ourCom)
+ return ourCom->com.agreesWith(com);
+ return false;
+}
+
+bool Peer::validateAndSetNetworkMembershipCertificate(const RuntimeEnvironment *RR,uint64_t nwid,const CertificateOfMembership &com)
+{
+ // Sanity checks
+ if ((!com)||(com.issuedTo() != _id.address()))
+ return false;
+
+ // Return true if we already have this *exact* COM
+ {
+ Mutex::Lock _l(_lock);
+ _NetworkCom *ourCom = _networkComs.get(nwid);
+ if ((ourCom)&&(ourCom->com == com))
+ return true;
+ }
+
+ // Check signature, log and return if cert is invalid
+ if (com.signedBy() != Network::controllerFor(nwid)) {
+ TRACE("rejected network membership certificate for %.16llx signed by %s: signer not a controller of this network",(unsigned long long)_id,com.signedBy().toString().c_str());
+ return false; // invalid signer
+ }
+
+ if (com.signedBy() == RR->identity.address()) {
+
+ // We are the controller: RR->identity.address() == controller() == cert.signedBy()
+ // So, verify that we signed th cert ourself
+ if (!com.verify(RR->identity)) {
+ TRACE("rejected network membership certificate for %.16llx self signed by %s: signature check failed",(unsigned long long)_id,com.signedBy().toString().c_str());
+ return false; // invalid signature
+ }
+
+ } else {
+
+ SharedPtr<Peer> signer(RR->topology->getPeer(com.signedBy()));
+
+ if (!signer) {
+ // This would be rather odd, since this is our controller... could happen
+ // if we get packets before we've gotten config.
+ RR->sw->requestWhois(com.signedBy());
+ return false; // signer unknown
+ }
+
+ if (!com.verify(signer->identity())) {
+ TRACE("rejected network membership certificate for %.16llx signed by %s: signature check failed",(unsigned long long)_id,com.signedBy().toString().c_str());
+ return false; // invalid signature
+ }
+ }
+
+ // If we made it past all those checks, add or update cert in our cert info store
+ {
+ Mutex::Lock _l(_lock);
+ _networkComs.set(nwid,_NetworkCom(RR->node->now(),com));
+ }
+
+ return true;
+}
+
+bool Peer::needsOurNetworkMembershipCertificate(uint64_t nwid,uint64_t now,bool updateLastPushedTime)
+{
+ Mutex::Lock _l(_lock);
+ uint64_t &lastPushed = _lastPushedComs[nwid];
+ const uint64_t tmp = lastPushed;
+ if (updateLastPushedTime)
+ lastPushed = now;
+ return ((now - tmp) >= (ZT_NETWORK_AUTOCONF_DELAY / 2));
+}
+
+void Peer::clean(const RuntimeEnvironment *RR,uint64_t now)
+{
+ Mutex::Lock _l(_lock);
+
+ {
+ unsigned int np = _numPaths;
+ unsigned int x = 0;
+ unsigned int y = 0;
+ while (x < np) {
+ if (_paths[x].active(now))
+ _paths[y++] = _paths[x];
+ ++x;
+ }
+ _numPaths = y;
+ }
+
+ {
+ uint64_t *k = (uint64_t *)0;
+ _NetworkCom *v = (_NetworkCom *)0;
+ Hashtable< uint64_t,_NetworkCom >::Iterator i(_networkComs);
+ while (i.next(k,v)) {
+ if ( (!RR->node->belongsToNetwork(*k)) && ((now - v->ts) >= ZT_PEER_NETWORK_COM_EXPIRATION) )
+ _networkComs.erase(*k);
+ }
+ }
+
+ {
+ uint64_t *k = (uint64_t *)0;
+ uint64_t *v = (uint64_t *)0;
+ Hashtable< uint64_t,uint64_t >::Iterator i(_lastPushedComs);
+ while (i.next(k,v)) {
+ if ((now - *v) > (ZT_NETWORK_AUTOCONF_DELAY * 2))
+ _lastPushedComs.erase(*k);
+ }
+ }
+}
+
+struct _SortPathsByQuality
+{
+ uint64_t _now;
+ _SortPathsByQuality(const uint64_t now) : _now(now) {}
+ inline bool operator()(const Path &a,const Path &b) const
+ {
+ const uint64_t qa = (
+ ((uint64_t)a.active(_now) << 63) |
+ (((uint64_t)(a.preferenceRank() & 0xfff)) << 51) |
+ ((uint64_t)a.lastReceived() & 0x7ffffffffffffULL) );
+ const uint64_t qb = (
+ ((uint64_t)b.active(_now) << 63) |
+ (((uint64_t)(b.preferenceRank() & 0xfff)) << 51) |
+ ((uint64_t)b.lastReceived() & 0x7ffffffffffffULL) );
+ return (qb < qa); // invert sense to sort in descending order
+ }
+};
+void Peer::_sortPaths(const uint64_t now)
+{
+ // assumes _lock is locked
+ _lastPathSort = now;
+ std::sort(&(_paths[0]),&(_paths[_numPaths]),_SortPathsByQuality(now));
+}
+
+Path *Peer::_getBestPath(const uint64_t now)
+{
+ // assumes _lock is locked
+ if ((now - _lastPathSort) >= ZT_PEER_PATH_SORT_INTERVAL)
+ _sortPaths(now);
+ if (_paths[0].active(now)) {
+ return &(_paths[0]);
+ } else {
+ _sortPaths(now);
+ if (_paths[0].active(now))
+ return &(_paths[0]);
+ }
+ return (Path *)0;
+}
+
+Path *Peer::_getBestPath(const uint64_t now,int inetAddressFamily)
+{
+ // assumes _lock is locked
+ if ((now - _lastPathSort) >= ZT_PEER_PATH_SORT_INTERVAL)
+ _sortPaths(now);
+ for(int k=0;k<2;++k) { // try once, and if it fails sort and try one more time
+ for(unsigned int i=0;i<_numPaths;++i) {
+ if ((_paths[i].active(now))&&((int)_paths[i].address().ss_family == inetAddressFamily))
+ return &(_paths[i]);
+ }
+ _sortPaths(now);
+ }
+ return (Path *)0;
+}
+
} // namespace ZeroTier
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-03 12:10:22 +0000