mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-04-26 17:03:43 +02:00
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/*
|
|
* Copyright (c)2013-2020 ZeroTier, Inc.
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file in the project's root directory.
|
|
*
|
|
* Change Date: 2024-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2.0 of the Apache License.
|
|
*/
|
|
/****/
|
|
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
|
|
#include <set>
|
|
|
|
#include "Constants.hpp"
|
|
#include "SelfAwareness.hpp"
|
|
#include "RuntimeEnvironment.hpp"
|
|
#include "Topology.hpp"
|
|
#include "Peer.hpp"
|
|
#include "Trace.hpp"
|
|
|
|
// Entry timeout -- make it fairly long since this is just to prevent stale buildup
|
|
#define ZT_SELFAWARENESS_ENTRY_TIMEOUT 300000
|
|
|
|
namespace ZeroTier {
|
|
|
|
class _ResetWithinScope
|
|
{
|
|
public:
|
|
ZT_ALWAYS_INLINE _ResetWithinScope(void *tPtr,int64_t now,int inetAddressFamily,InetAddress::IpScope scope) :
|
|
_now(now),
|
|
_tPtr(tPtr),
|
|
_family(inetAddressFamily),
|
|
_scope(scope) {}
|
|
|
|
ZT_ALWAYS_INLINE void operator()(const SharedPtr<Peer> &p) { p->resetWithinScope(_tPtr,_scope,_family,_now); }
|
|
|
|
private:
|
|
int64_t _now;
|
|
void *_tPtr;
|
|
int _family;
|
|
InetAddress::IpScope _scope;
|
|
};
|
|
|
|
SelfAwareness::SelfAwareness(const RuntimeEnvironment *renv) :
|
|
RR(renv),
|
|
_phy(256)
|
|
{
|
|
}
|
|
|
|
void SelfAwareness::iam(void *tPtr,const Identity &reporter,const int64_t receivedOnLocalSocket,const InetAddress &reporterPhysicalAddress,const InetAddress &myPhysicalAddress,bool trusted,int64_t now)
|
|
{
|
|
const InetAddress::IpScope scope = myPhysicalAddress.ipScope();
|
|
|
|
if ((scope != reporterPhysicalAddress.ipScope())||(scope == InetAddress::IP_SCOPE_NONE)||(scope == InetAddress::IP_SCOPE_LOOPBACK)||(scope == InetAddress::IP_SCOPE_MULTICAST))
|
|
return;
|
|
|
|
Mutex::Lock l(_phy_l);
|
|
PhySurfaceEntry &entry = _phy[PhySurfaceKey(reporter.address(),receivedOnLocalSocket,reporterPhysicalAddress,scope)];
|
|
|
|
if ( (trusted) && ((now - entry.ts) < ZT_SELFAWARENESS_ENTRY_TIMEOUT) && (!entry.mySurface.ipsEqual(myPhysicalAddress)) ) {
|
|
// Changes to external surface reported by trusted peers causes path reset in this scope
|
|
entry.mySurface = myPhysicalAddress;
|
|
entry.ts = now;
|
|
entry.trusted = trusted;
|
|
|
|
// Erase all entries in this scope that were not reported from this remote address to prevent 'thrashing'
|
|
// due to multiple reports of endpoint change.
|
|
// Don't use 'entry' after this since hash table gets modified.
|
|
{
|
|
Hashtable< PhySurfaceKey,PhySurfaceEntry >::Iterator i(_phy);
|
|
PhySurfaceKey *k = nullptr;
|
|
PhySurfaceEntry *e = nullptr;
|
|
while (i.next(k,e)) {
|
|
if ((k->scope == scope)&&(k->reporterPhysicalAddress != reporterPhysicalAddress))
|
|
_phy.erase(*k);
|
|
}
|
|
}
|
|
|
|
// Reset all paths within this scope and address family
|
|
_ResetWithinScope rset(tPtr,now,myPhysicalAddress.ss_family,(InetAddress::IpScope)scope);
|
|
RR->topology->eachPeer<_ResetWithinScope &>(rset);
|
|
|
|
RR->t->resettingPathsInScope(tPtr,0x9afff100,reporter,reporterPhysicalAddress,entry.mySurface,myPhysicalAddress,scope);
|
|
} else {
|
|
// Otherwise just update DB to use to determine external surface info
|
|
entry.mySurface = myPhysicalAddress;
|
|
entry.ts = now;
|
|
entry.trusted = trusted;
|
|
}
|
|
}
|
|
|
|
void SelfAwareness::clean(int64_t now)
|
|
{
|
|
Mutex::Lock l(_phy_l);
|
|
Hashtable< PhySurfaceKey,PhySurfaceEntry >::Iterator i(_phy);
|
|
PhySurfaceKey *k = nullptr;
|
|
PhySurfaceEntry *e = nullptr;
|
|
while (i.next(k,e)) {
|
|
if ((now - e->ts) >= ZT_SELFAWARENESS_ENTRY_TIMEOUT)
|
|
_phy.erase(*k);
|
|
}
|
|
}
|
|
|
|
std::multimap<unsigned long,InetAddress> SelfAwareness::externalAddresses(const int64_t now) const
|
|
{
|
|
std::multimap<unsigned long,InetAddress> r;
|
|
Hashtable<InetAddress,unsigned long> counts(16);
|
|
|
|
{
|
|
Mutex::Lock l(_phy_l);
|
|
Hashtable<PhySurfaceKey,PhySurfaceEntry>::Iterator i(const_cast<SelfAwareness *>(this)->_phy);
|
|
PhySurfaceKey *k = nullptr;
|
|
PhySurfaceEntry *e = nullptr;
|
|
while (i.next(k,e)) {
|
|
if ((now - e->ts) < ZT_SELFAWARENESS_ENTRY_TIMEOUT)
|
|
++counts[e->mySurface];
|
|
}
|
|
}
|
|
|
|
Hashtable<InetAddress,unsigned long>::Iterator i(counts);
|
|
InetAddress *k = nullptr;
|
|
unsigned long *c = nullptr;
|
|
while (i.next(k,c))
|
|
r.insert(std::pair<unsigned long,InetAddress>(*c,*k));
|
|
|
|
return r;
|
|
}
|
|
|
|
} // namespace ZeroTier
|