mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 14:52:24 +00:00
232 lines
8.7 KiB
C++
232 lines
8.7 KiB
C++
/*
|
|
* ZeroTier One - Network Virtualization Everywhere
|
|
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <algorithm>
|
|
|
|
#include "Membership.hpp"
|
|
#include "RuntimeEnvironment.hpp"
|
|
#include "Peer.hpp"
|
|
#include "Topology.hpp"
|
|
#include "Switch.hpp"
|
|
#include "Packet.hpp"
|
|
#include "Node.hpp"
|
|
|
|
#define ZT_CREDENTIAL_PUSH_EVERY (ZT_NETWORK_AUTOCONF_DELAY / 3)
|
|
|
|
namespace ZeroTier {
|
|
|
|
Membership::Membership() :
|
|
_lastUpdatedMulticast(0),
|
|
_lastPushedCom(0),
|
|
_comRevocationThreshold(0),
|
|
_revocations(4),
|
|
_remoteTags(4),
|
|
_remoteCaps(4),
|
|
_remoteCoos(4)
|
|
{
|
|
resetPushState();
|
|
}
|
|
|
|
void Membership::pushCredentials(const RuntimeEnvironment *RR,void *tPtr,const uint64_t now,const Address &peerAddress,const NetworkConfig &nconf,int localCapabilityIndex,const bool force)
|
|
{
|
|
bool sendCom = ( (nconf.com) && ( ((now - _lastPushedCom) >= ZT_CREDENTIAL_PUSH_EVERY) || (force) ) );
|
|
|
|
const Capability *sendCap;
|
|
if (localCapabilityIndex >= 0) {
|
|
sendCap = &(nconf.capabilities[localCapabilityIndex]);
|
|
if ( ((now - _localCredLastPushed.cap[localCapabilityIndex]) >= ZT_CREDENTIAL_PUSH_EVERY) || (force) )
|
|
_localCredLastPushed.cap[localCapabilityIndex] = now;
|
|
else sendCap = (const Capability *)0;
|
|
} else sendCap = (const Capability *)0;
|
|
|
|
const Tag *sendTags[ZT_MAX_NETWORK_TAGS];
|
|
unsigned int sendTagCount = 0;
|
|
for(unsigned int t=0;t<nconf.tagCount;++t) {
|
|
if ( ((now - _localCredLastPushed.tag[t]) >= ZT_CREDENTIAL_PUSH_EVERY) || (force) ) {
|
|
_localCredLastPushed.tag[t] = now;
|
|
sendTags[sendTagCount++] = &(nconf.tags[t]);
|
|
}
|
|
}
|
|
|
|
const CertificateOfOwnership *sendCoos[ZT_MAX_CERTIFICATES_OF_OWNERSHIP];
|
|
unsigned int sendCooCount = 0;
|
|
for(unsigned int c=0;c<nconf.certificateOfOwnershipCount;++c) {
|
|
if ( ((now - _localCredLastPushed.coo[c]) >= ZT_CREDENTIAL_PUSH_EVERY) || (force) ) {
|
|
_localCredLastPushed.coo[c] = now;
|
|
sendCoos[sendCooCount++] = &(nconf.certificatesOfOwnership[c]);
|
|
}
|
|
}
|
|
|
|
unsigned int tagPtr = 0;
|
|
unsigned int cooPtr = 0;
|
|
while ((tagPtr < sendTagCount)||(cooPtr < sendCooCount)||(sendCom)||(sendCap)) {
|
|
Packet outp(peerAddress,RR->identity.address(),Packet::VERB_NETWORK_CREDENTIALS);
|
|
|
|
if (sendCom) {
|
|
sendCom = false;
|
|
nconf.com.serialize(outp);
|
|
_lastPushedCom = now;
|
|
}
|
|
outp.append((uint8_t)0x00);
|
|
|
|
if (sendCap) {
|
|
outp.append((uint16_t)1);
|
|
sendCap->serialize(outp);
|
|
sendCap = (const Capability *)0;
|
|
} else outp.append((uint16_t)0);
|
|
|
|
const unsigned int tagCountAt = outp.size();
|
|
outp.addSize(2);
|
|
unsigned int thisPacketTagCount = 0;
|
|
while ((tagPtr < sendTagCount)&&((outp.size() + sizeof(Tag) + 16) < ZT_PROTO_MAX_PACKET_LENGTH)) {
|
|
sendTags[tagPtr++]->serialize(outp);
|
|
++thisPacketTagCount;
|
|
}
|
|
outp.setAt(tagCountAt,(uint16_t)thisPacketTagCount);
|
|
|
|
// No revocations, these propagate differently
|
|
outp.append((uint16_t)0);
|
|
|
|
const unsigned int cooCountAt = outp.size();
|
|
outp.addSize(2);
|
|
unsigned int thisPacketCooCount = 0;
|
|
while ((cooPtr < sendCooCount)&&((outp.size() + sizeof(CertificateOfOwnership) + 16) < ZT_PROTO_MAX_PACKET_LENGTH)) {
|
|
sendCoos[cooPtr++]->serialize(outp);
|
|
++thisPacketCooCount;
|
|
}
|
|
outp.setAt(cooCountAt,(uint16_t)thisPacketCooCount);
|
|
|
|
outp.compress();
|
|
RR->sw->send(tPtr,outp,true);
|
|
}
|
|
}
|
|
|
|
Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const CertificateOfMembership &com)
|
|
{
|
|
const uint64_t newts = com.timestamp();
|
|
if (newts <= _comRevocationThreshold) {
|
|
TRACE("addCredential(CertificateOfMembership) for %s on %.16llx REJECTED (revoked)",com.issuedTo().toString().c_str(),com.networkId());
|
|
return ADD_REJECTED;
|
|
}
|
|
|
|
const uint64_t oldts = _com.timestamp();
|
|
if (newts < oldts) {
|
|
TRACE("addCredential(CertificateOfMembership) for %s on %.16llx REJECTED (older than current)",com.issuedTo().toString().c_str(),com.networkId());
|
|
return ADD_REJECTED;
|
|
}
|
|
if ((newts == oldts)&&(_com == com)) {
|
|
TRACE("addCredential(CertificateOfMembership) for %s on %.16llx ACCEPTED (redundant)",com.issuedTo().toString().c_str(),com.networkId());
|
|
return ADD_ACCEPTED_REDUNDANT;
|
|
}
|
|
|
|
switch(com.verify(RR,tPtr)) {
|
|
default:
|
|
TRACE("addCredential(CertificateOfMembership) for %s on %.16llx REJECTED (invalid signature or object)",com.issuedTo().toString().c_str(),com.networkId());
|
|
return ADD_REJECTED;
|
|
case 0:
|
|
TRACE("addCredential(CertificateOfMembership) for %s on %.16llx ACCEPTED (new)",com.issuedTo().toString().c_str(),com.networkId());
|
|
_com = com;
|
|
return ADD_ACCEPTED_NEW;
|
|
case 1:
|
|
return ADD_DEFERRED_FOR_WHOIS;
|
|
}
|
|
}
|
|
|
|
// Template out addCredential() for many cred types to avoid copypasta
|
|
template<typename C>
|
|
static Membership::AddCredentialResult _addCredImpl(Hashtable<uint32_t,C> &remoteCreds,const Hashtable<uint64_t,uint64_t> &revocations,const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const C &cred)
|
|
{
|
|
C *rc = remoteCreds.get(cred.id());
|
|
if (rc) {
|
|
if (rc->timestamp() >= cred.timestamp()) {
|
|
TRACE("addCredential(type==%d) for %s on %.16llx REJECTED (older than credential we have)",(int)C::credentialType(),cred.issuedTo().toString().c_str(),cred.networkId());
|
|
return Membership::ADD_REJECTED;
|
|
}
|
|
if (*rc == cred) {
|
|
TRACE("addCredential(type==%d) for %s on %.16llx ACCEPTED (redundant)",(int)C::credentialType(),cred.issuedTo().toString().c_str(),cred.networkId());
|
|
return Membership::ADD_ACCEPTED_REDUNDANT;
|
|
}
|
|
}
|
|
|
|
const uint64_t *const rt = revocations.get(Membership::credentialKey(C::credentialType(),cred.id()));
|
|
if ((rt)&&(*rt >= cred.timestamp())) {
|
|
TRACE("addCredential(type==%d) for %s on %.16llx REJECTED (timestamp below revocation threshold)",(int)C::credentialType(),cred.issuedTo().toString().c_str(),cred.networkId());
|
|
return Membership::ADD_REJECTED;
|
|
}
|
|
|
|
switch(cred.verify(RR,tPtr)) {
|
|
default:
|
|
TRACE("addCredential(type==%d) for %s on %.16llx REJECTED (invalid)",(int)C::credentialType(),cred.issuedTo().toString().c_str(),cred.networkId());
|
|
return Membership::ADD_REJECTED;
|
|
case 0:
|
|
TRACE("addCredential(type==%d) for %s on %.16llx ACCEPTED (new)",(int)C::credentialType(),cred.issuedTo().toString().c_str(),cred.networkId());
|
|
if (!rc)
|
|
rc = &(remoteCreds[cred.id()]);
|
|
*rc = cred;
|
|
return Membership::ADD_ACCEPTED_NEW;
|
|
case 1:
|
|
return Membership::ADD_DEFERRED_FOR_WHOIS;
|
|
}
|
|
}
|
|
|
|
Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const Tag &tag) { return _addCredImpl<Tag>(_remoteTags,_revocations,RR,tPtr,nconf,tag); }
|
|
Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const Capability &cap) { return _addCredImpl<Capability>(_remoteCaps,_revocations,RR,tPtr,nconf,cap); }
|
|
Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const CertificateOfOwnership &coo) { return _addCredImpl<CertificateOfOwnership>(_remoteCoos,_revocations,RR,tPtr,nconf,coo); }
|
|
|
|
Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const NetworkConfig &nconf,const Revocation &rev)
|
|
{
|
|
uint64_t *rt;
|
|
switch(rev.verify(RR,tPtr)) {
|
|
default:
|
|
return ADD_REJECTED;
|
|
case 0: {
|
|
const Credential::Type ct = rev.type();
|
|
switch(ct) {
|
|
case Credential::CREDENTIAL_TYPE_COM:
|
|
if (rev.threshold() > _comRevocationThreshold) {
|
|
_comRevocationThreshold = rev.threshold();
|
|
return ADD_ACCEPTED_NEW;
|
|
}
|
|
return ADD_ACCEPTED_REDUNDANT;
|
|
case Credential::CREDENTIAL_TYPE_CAPABILITY:
|
|
case Credential::CREDENTIAL_TYPE_TAG:
|
|
case Credential::CREDENTIAL_TYPE_COO:
|
|
rt = &(_revocations[credentialKey(ct,rev.credentialId())]);
|
|
if (*rt < rev.threshold()) {
|
|
*rt = rev.threshold();
|
|
return ADD_ACCEPTED_NEW;
|
|
}
|
|
return ADD_ACCEPTED_REDUNDANT;
|
|
default:
|
|
return ADD_REJECTED;
|
|
}
|
|
}
|
|
case 1:
|
|
return ADD_DEFERRED_FOR_WHOIS;
|
|
}
|
|
}
|
|
|
|
void Membership::clean(const uint64_t now,const NetworkConfig &nconf)
|
|
{
|
|
_cleanCredImpl<Tag>(nconf,_remoteTags);
|
|
_cleanCredImpl<Capability>(nconf,_remoteCaps);
|
|
_cleanCredImpl<CertificateOfOwnership>(nconf,_remoteCoos);
|
|
}
|
|
|
|
} // namespace ZeroTier
|