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404 lines
14 KiB
404 lines
14 KiB
/* |
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* Copyright (c)2019 ZeroTier, Inc. |
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* |
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* Use of this software is governed by the Business Source License included |
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* in the LICENSE.TXT file in the project's root directory. |
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* |
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* Change Date: 2025-01-01 |
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* |
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* On the date above, in accordance with the Business Source License, use |
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* of this software will be governed by version 2.0 of the Apache License. |
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*/ |
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/****/ |
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#include "Constants.hpp" |
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#include "Topology.hpp" |
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#include "RuntimeEnvironment.hpp" |
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#include "Node.hpp" |
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#include "Network.hpp" |
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#include "NetworkConfig.hpp" |
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#include "Buffer.hpp" |
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#include "Switch.hpp" |
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namespace ZeroTier { |
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#define ZT_DEFAULT_WORLD_LENGTH 570 |
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static const unsigned char ZT_DEFAULT_WORLD[ZT_DEFAULT_WORLD_LENGTH] = {0x01,0x00,0x00,0x00,0x00,0x08,0xea,0xc9,0x0a,0x00,0x00,0x01,0x78,0xcc,0x8e,0xf8,0xcb,0xb8,0xb3,0x88,0xa4,0x69,0x22,0x14,0x91,0xaa,0x9a,0xcd,0x66,0xcc,0x76,0x4c,0xde,0xfd,0x56,0x03,0x9f,0x10,0x67,0xae,0x15,0xe6,0x9c,0x6f,0xb4,0x2d,0x7b,0x55,0x33,0x0e,0x3f,0xda,0xac,0x52,0x9c,0x07,0x92,0xfd,0x73,0x40,0xa6,0xaa,0x21,0xab,0xa8,0xa4,0x89,0xfd,0xae,0xa4,0x4a,0x39,0xbf,0x2d,0x00,0x65,0x9a,0xc9,0xc8,0x18,0xeb,0x31,0xdc,0x40,0xa9,0xc7,0xb5,0xd2,0xf9,0x8e,0xd9,0x7b,0xf6,0x41,0x27,0x29,0x02,0xb6,0xb3,0x34,0x6f,0x56,0x16,0x11,0x45,0x82,0x44,0x55,0x85,0x78,0x79,0xb9,0x30,0xcb,0x01,0x51,0x15,0x49,0xf3,0x38,0x24,0xd8,0xd4,0x78,0x7d,0x77,0x23,0xda,0xc3,0x51,0x50,0x0b,0xe7,0xdf,0x5b,0x8f,0x72,0xdd,0x25,0x81,0xa5,0x0b,0x4a,0x36,0x01,0x46,0x85,0x95,0xbe,0x4d,0x5e,0xe6,0x3b,0x46,0xc2,0x9b,0x15,0x3c,0x43,0x8a,0x30,0xe0,0xa2,0xbf,0xba,0x1a,0x57,0xfc,0x98,0x7b,0x42,0x71,0xde,0x9c,0x53,0x6c,0x00,0x04,0x61,0xd2,0x94,0xb9,0xcb,0x00,0xe6,0x53,0xef,0x7a,0xd9,0x25,0x59,0x52,0xb7,0xc9,0xfc,0xa1,0x68,0x6d,0x3b,0x17,0xc6,0x10,0xb0,0x4e,0x6b,0x6c,0x82,0xd2,0xd3,0x7c,0xd3,0xa6,0xef,0xb2,0x56,0x3d,0x57,0x7f,0x81,0x22,0x24,0x37,0x62,0x02,0x09,0xe9,0x23,0x48,0xad,0x33,0x7b,0xd1,0x91,0xac,0x00,0xb7,0x49,0x2c,0xfd,0x55,0xce,0x0f,0xa0,0x36,0xd8,0xc5,0x62,0x83,0x00,0x02,0x04,0x32,0x07,0x49,0x22,0x27,0x09,0x06,0x20,0x01,0x49,0xf0,0xd0,0x02,0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x27,0x09,0x77,0x8c,0xde,0x71,0x90,0x00,0x3f,0x66,0x81,0xa9,0x9e,0x5a,0xd1,0x89,0x5e,0x9f,0xba,0x33,0xe6,0x21,0x2d,0x44,0x54,0xe1,0x68,0xbc,0xec,0x71,0x12,0x10,0x1b,0xf0,0x00,0x95,0x6e,0xd8,0xe9,0x2e,0x42,0x89,0x2c,0xb6,0xf2,0xec,0x41,0x08,0x81,0xa8,0x4a,0xb1,0x9d,0xa5,0x0e,0x12,0x87,0xba,0x3d,0x92,0x6c,0x3a,0x1f,0x75,0x5c,0xcc,0xf2,0x99,0xa1,0x20,0x70,0x55,0x00,0x02,0x04,0x67,0xc3,0x67,0x42,0x27,0x09,0x06,0x26,0x05,0x98,0x80,0x04,0x00,0x00,0xc3,0x02,0x54,0xf2,0xbc,0xa1,0xf7,0x00,0x19,0x27,0x09,0x62,0xf8,0x65,0xae,0x71,0x00,0xe2,0x07,0x6c,0x57,0xde,0x87,0x0e,0x62,0x88,0xd7,0xd5,0xe7,0x40,0x44,0x08,0xb1,0x54,0x5e,0xfc,0xa3,0x7d,0x67,0xf7,0x7b,0x87,0xe9,0xe5,0x41,0x68,0xc2,0x5d,0x3e,0xf1,0xa9,0xab,0xf2,0x90,0x5e,0xa5,0xe7,0x85,0xc0,0x1d,0xff,0x23,0x88,0x7a,0xd4,0x23,0x2d,0x95,0xc7,0xa8,0xfd,0x2c,0x27,0x11,0x1a,0x72,0xbd,0x15,0x93,0x22,0xdc,0x00,0x02,0x04,0x32,0x07,0xfc,0x8a,0x27,0x09,0x06,0x20,0x01,0x49,0xf0,0xd0,0xdb,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x27,0x09,0x99,0x2f,0xcf,0x1d,0xb7,0x00,0x20,0x6e,0xd5,0x93,0x50,0xb3,0x19,0x16,0xf7,0x49,0xa1,0xf8,0x5d,0xff,0xb3,0xa8,0x78,0x7d,0xcb,0xf8,0x3b,0x8c,0x6e,0x94,0x48,0xd4,0xe3,0xea,0x0e,0x33,0x69,0x30,0x1b,0xe7,0x16,0xc3,0x60,0x93,0x44,0xa9,0xd1,0x53,0x38,0x50,0xfb,0x44,0x60,0xc5,0x0a,0xf4,0x33,0x22,0xbc,0xfc,0x8e,0x13,0xd3,0x30,0x1a,0x1f,0x10,0x03,0xce,0xb6,0x00,0x02,0x04,0xc3,0xb5,0xad,0x9f,0x27,0x09,0x06,0x2a,0x02,0x6e,0xa0,0xc0,0x24,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x27,0x09}; |
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Topology::Topology(const RuntimeEnvironment *renv,void *tPtr) : |
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RR(renv), |
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_numConfiguredPhysicalPaths(0), |
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_amUpstream(false) |
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{ |
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uint8_t tmp[ZT_WORLD_MAX_SERIALIZED_LENGTH]; |
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uint64_t idtmp[2]; |
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idtmp[0] = 0; idtmp[1] = 0; |
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int n = RR->node->stateObjectGet(tPtr,ZT_STATE_OBJECT_PLANET,idtmp,tmp,sizeof(tmp)); |
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if (n > 0) { |
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try { |
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World cachedPlanet; |
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cachedPlanet.deserialize(Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH>(tmp,(unsigned int)n),0); |
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addWorld(tPtr,cachedPlanet,false); |
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} catch ( ... ) {} // ignore invalid cached planets |
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} |
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World defaultPlanet; |
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{ |
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Buffer<ZT_DEFAULT_WORLD_LENGTH> wtmp(ZT_DEFAULT_WORLD,ZT_DEFAULT_WORLD_LENGTH); |
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defaultPlanet.deserialize(wtmp,0); // throws on error, which would indicate a bad static variable up top |
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} |
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addWorld(tPtr,defaultPlanet,false); |
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} |
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Topology::~Topology() |
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{ |
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Hashtable< Address,SharedPtr<Peer> >::Iterator i(_peers); |
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Address *a = (Address *)0; |
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SharedPtr<Peer> *p = (SharedPtr<Peer> *)0; |
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while (i.next(a,p)) |
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_savePeer((void *)0,*p); |
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} |
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SharedPtr<Peer> Topology::addPeer(void *tPtr,const SharedPtr<Peer> &peer) |
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{ |
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SharedPtr<Peer> np; |
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{ |
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Mutex::Lock _l(_peers_m); |
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SharedPtr<Peer> &hp = _peers[peer->address()]; |
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if (!hp) |
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hp = peer; |
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np = hp; |
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} |
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return np; |
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} |
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SharedPtr<Peer> Topology::getPeer(void *tPtr,const Address &zta) |
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{ |
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if (zta == RR->identity.address()) |
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return SharedPtr<Peer>(); |
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{ |
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Mutex::Lock _l(_peers_m); |
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const SharedPtr<Peer> *const ap = _peers.get(zta); |
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if (ap) |
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return *ap; |
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} |
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try { |
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Buffer<ZT_PEER_MAX_SERIALIZED_STATE_SIZE> buf; |
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uint64_t idbuf[2]; idbuf[0] = zta.toInt(); idbuf[1] = 0; |
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int len = RR->node->stateObjectGet(tPtr,ZT_STATE_OBJECT_PEER,idbuf,buf.unsafeData(),ZT_PEER_MAX_SERIALIZED_STATE_SIZE); |
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if (len > 0) { |
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buf.setSize(len); |
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Mutex::Lock _l(_peers_m); |
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SharedPtr<Peer> &ap = _peers[zta]; |
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if (ap) |
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return ap; |
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ap = Peer::deserializeFromCache(RR->node->now(),tPtr,buf,RR); |
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if (!ap) { |
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_peers.erase(zta); |
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} |
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return SharedPtr<Peer>(); |
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} |
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} catch ( ... ) {} // ignore invalid identities or other strange failures |
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return SharedPtr<Peer>(); |
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} |
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Identity Topology::getIdentity(void *tPtr,const Address &zta) |
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{ |
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if (zta == RR->identity.address()) { |
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return RR->identity; |
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} else { |
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Mutex::Lock _l(_peers_m); |
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const SharedPtr<Peer> *const ap = _peers.get(zta); |
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if (ap) |
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return (*ap)->identity(); |
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} |
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return Identity(); |
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} |
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SharedPtr<Peer> Topology::getUpstreamPeer() |
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{ |
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const int64_t now = RR->node->now(); |
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unsigned int bestq = ~((unsigned int)0); |
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const SharedPtr<Peer> *best = (const SharedPtr<Peer> *)0; |
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Mutex::Lock _l2(_peers_m); |
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Mutex::Lock _l1(_upstreams_m); |
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for(std::vector<Address>::const_iterator a(_upstreamAddresses.begin());a!=_upstreamAddresses.end();++a) { |
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const SharedPtr<Peer> *p = _peers.get(*a); |
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if (p) { |
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const unsigned int q = (*p)->relayQuality(now); |
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if (q <= bestq) { |
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bestq = q; |
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best = p; |
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} |
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} |
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} |
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if (!best) |
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return SharedPtr<Peer>(); |
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return *best; |
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} |
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bool Topology::isUpstream(const Identity &id) const |
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{ |
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Mutex::Lock _l(_upstreams_m); |
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return (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),id.address()) != _upstreamAddresses.end()); |
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} |
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bool Topology::shouldAcceptWorldUpdateFrom(const Address &addr) const |
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{ |
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Mutex::Lock _l(_upstreams_m); |
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if (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),addr) != _upstreamAddresses.end()) |
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return true; |
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for(std::vector< std::pair< uint64_t,Address> >::const_iterator s(_moonSeeds.begin());s!=_moonSeeds.end();++s) { |
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if (s->second == addr) |
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return true; |
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} |
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return false; |
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} |
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ZT_PeerRole Topology::role(const Address &ztaddr) const |
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{ |
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Mutex::Lock _l(_upstreams_m); |
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if (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),ztaddr) != _upstreamAddresses.end()) { |
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for(std::vector<World::Root>::const_iterator i(_planet.roots().begin());i!=_planet.roots().end();++i) { |
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if (i->identity.address() == ztaddr) |
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return ZT_PEER_ROLE_PLANET; |
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} |
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return ZT_PEER_ROLE_MOON; |
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} |
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return ZT_PEER_ROLE_LEAF; |
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} |
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bool Topology::isProhibitedEndpoint(const Address &ztaddr,const InetAddress &ipaddr) const |
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{ |
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Mutex::Lock _l(_upstreams_m); |
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// For roots the only permitted addresses are those defined. This adds just a little |
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// bit of extra security against spoofing, replaying, etc. |
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if (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),ztaddr) != _upstreamAddresses.end()) { |
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for(std::vector<World::Root>::const_iterator r(_planet.roots().begin());r!=_planet.roots().end();++r) { |
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if (r->identity.address() == ztaddr) { |
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if (r->stableEndpoints.empty()) |
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return false; // no stable endpoints specified, so allow dynamic paths |
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for(std::vector<InetAddress>::const_iterator e(r->stableEndpoints.begin());e!=r->stableEndpoints.end();++e) { |
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if (ipaddr.ipsEqual(*e)) |
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return false; |
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} |
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} |
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} |
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for(std::vector<World>::const_iterator m(_moons.begin());m!=_moons.end();++m) { |
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for(std::vector<World::Root>::const_iterator r(m->roots().begin());r!=m->roots().end();++r) { |
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if (r->identity.address() == ztaddr) { |
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if (r->stableEndpoints.empty()) |
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return false; // no stable endpoints specified, so allow dynamic paths |
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for(std::vector<InetAddress>::const_iterator e(r->stableEndpoints.begin());e!=r->stableEndpoints.end();++e) { |
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if (ipaddr.ipsEqual(*e)) |
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return false; |
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} |
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} |
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} |
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} |
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return true; |
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} |
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return false; |
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} |
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bool Topology::addWorld(void *tPtr,const World &newWorld,bool alwaysAcceptNew) |
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{ |
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if ((newWorld.type() != World::TYPE_PLANET)&&(newWorld.type() != World::TYPE_MOON)) |
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return false; |
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Mutex::Lock _l2(_peers_m); |
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Mutex::Lock _l1(_upstreams_m); |
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World *existing = (World *)0; |
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switch(newWorld.type()) { |
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case World::TYPE_PLANET: |
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existing = &_planet; |
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break; |
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case World::TYPE_MOON: |
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for(std::vector< World >::iterator m(_moons.begin());m!=_moons.end();++m) { |
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if (m->id() == newWorld.id()) { |
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existing = &(*m); |
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break; |
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} |
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} |
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break; |
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default: |
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return false; |
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} |
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if (existing) { |
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if (existing->shouldBeReplacedBy(newWorld)) |
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*existing = newWorld; |
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else return false; |
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} else if (newWorld.type() == World::TYPE_MOON) { |
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if (alwaysAcceptNew) { |
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_moons.push_back(newWorld); |
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existing = &(_moons.back()); |
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} else { |
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for(std::vector< std::pair<uint64_t,Address> >::iterator m(_moonSeeds.begin());m!=_moonSeeds.end();++m) { |
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if (m->first == newWorld.id()) { |
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for(std::vector<World::Root>::const_iterator r(newWorld.roots().begin());r!=newWorld.roots().end();++r) { |
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if (r->identity.address() == m->second) { |
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_moonSeeds.erase(m); |
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_moons.push_back(newWorld); |
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existing = &(_moons.back()); |
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break; |
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} |
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} |
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if (existing) |
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break; |
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} |
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} |
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} |
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if (!existing) |
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return false; |
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} else { |
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return false; |
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} |
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try { |
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Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH> sbuf; |
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existing->serialize(sbuf,false); |
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uint64_t idtmp[2]; |
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idtmp[0] = existing->id(); idtmp[1] = 0; |
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RR->node->stateObjectPut(tPtr,(existing->type() == World::TYPE_PLANET) ? ZT_STATE_OBJECT_PLANET : ZT_STATE_OBJECT_MOON,idtmp,sbuf.data(),sbuf.size()); |
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} catch ( ... ) {} |
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_memoizeUpstreams(tPtr); |
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return true; |
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} |
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void Topology::addMoon(void *tPtr,const uint64_t id,const Address &seed) |
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{ |
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char tmp[ZT_WORLD_MAX_SERIALIZED_LENGTH]; |
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uint64_t idtmp[2]; |
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idtmp[0] = id; idtmp[1] = 0; |
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int n = RR->node->stateObjectGet(tPtr,ZT_STATE_OBJECT_MOON,idtmp,tmp,sizeof(tmp)); |
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if (n > 0) { |
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try { |
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World w; |
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w.deserialize(Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH>(tmp,(unsigned int)n)); |
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if ((w.type() == World::TYPE_MOON)&&(w.id() == id)) { |
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addWorld(tPtr,w,true); |
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return; |
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} |
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} catch ( ... ) {} |
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} |
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if (seed) { |
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Mutex::Lock _l(_upstreams_m); |
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if (std::find(_moonSeeds.begin(),_moonSeeds.end(),std::pair<uint64_t,Address>(id,seed)) == _moonSeeds.end()) |
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_moonSeeds.push_back(std::pair<uint64_t,Address>(id,seed)); |
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} |
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} |
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void Topology::removeMoon(void *tPtr,const uint64_t id) |
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{ |
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Mutex::Lock _l2(_peers_m); |
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Mutex::Lock _l1(_upstreams_m); |
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std::vector<World> nm; |
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for(std::vector<World>::const_iterator m(_moons.begin());m!=_moons.end();++m) { |
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if (m->id() != id) { |
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nm.push_back(*m); |
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} else { |
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uint64_t idtmp[2]; |
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idtmp[0] = id; idtmp[1] = 0; |
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RR->node->stateObjectDelete(tPtr,ZT_STATE_OBJECT_MOON,idtmp); |
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} |
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} |
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_moons.swap(nm); |
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std::vector< std::pair<uint64_t,Address> > cm; |
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for(std::vector< std::pair<uint64_t,Address> >::const_iterator m(_moonSeeds.begin());m!=_moonSeeds.end();++m) { |
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if (m->first != id) |
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cm.push_back(*m); |
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} |
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_moonSeeds.swap(cm); |
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_memoizeUpstreams(tPtr); |
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} |
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void Topology::doPeriodicTasks(void *tPtr,int64_t now) |
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{ |
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{ |
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Mutex::Lock _l1(_peers_m); |
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Mutex::Lock _l2(_upstreams_m); |
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Hashtable< Address,SharedPtr<Peer> >::Iterator i(_peers); |
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Address *a = (Address *)0; |
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SharedPtr<Peer> *p = (SharedPtr<Peer> *)0; |
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while (i.next(a,p)) { |
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if ( (!(*p)->isAlive(now)) && (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),*a) == _upstreamAddresses.end()) ) { |
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_savePeer(tPtr,*p); |
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_peers.erase(*a); |
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} |
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} |
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} |
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{ |
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Mutex::Lock _l(_paths_m); |
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Hashtable< Path::HashKey,SharedPtr<Path> >::Iterator i(_paths); |
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Path::HashKey *k = (Path::HashKey *)0; |
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SharedPtr<Path> *p = (SharedPtr<Path> *)0; |
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while (i.next(k,p)) { |
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if (p->references() <= 1) |
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_paths.erase(*k); |
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} |
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} |
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} |
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void Topology::_memoizeUpstreams(void *tPtr) |
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{ |
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// assumes _upstreams_m and _peers_m are locked |
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_upstreamAddresses.clear(); |
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_amUpstream = false; |
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for(std::vector<World::Root>::const_iterator i(_planet.roots().begin());i!=_planet.roots().end();++i) { |
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const Identity &id = i->identity; |
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if (id == RR->identity) { |
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_amUpstream = true; |
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} else if (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),id.address()) == _upstreamAddresses.end()) { |
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_upstreamAddresses.push_back(id.address()); |
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SharedPtr<Peer> &hp = _peers[id.address()]; |
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if (!hp) { |
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hp = new Peer(RR,RR->identity,id); |
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} |
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} |
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} |
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for(std::vector<World>::const_iterator m(_moons.begin());m!=_moons.end();++m) { |
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for(std::vector<World::Root>::const_iterator i(m->roots().begin());i!=m->roots().end();++i) { |
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if (i->identity == RR->identity) { |
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_amUpstream = true; |
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} else if (std::find(_upstreamAddresses.begin(),_upstreamAddresses.end(),i->identity.address()) == _upstreamAddresses.end()) { |
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_upstreamAddresses.push_back(i->identity.address()); |
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SharedPtr<Peer> &hp = _peers[i->identity.address()]; |
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if (!hp) |
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hp = new Peer(RR,RR->identity,i->identity); |
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} |
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} |
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} |
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|
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std::sort(_upstreamAddresses.begin(),_upstreamAddresses.end()); |
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} |
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|
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void Topology::_savePeer(void *tPtr,const SharedPtr<Peer> &peer) |
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{ |
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try { |
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Buffer<ZT_PEER_MAX_SERIALIZED_STATE_SIZE> buf; |
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peer->serializeForCache(buf); |
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uint64_t tmpid[2]; tmpid[0] = peer->address().toInt(); tmpid[1] = 0; |
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RR->node->stateObjectPut(tPtr,ZT_STATE_OBJECT_PEER,tmpid,buf.data(),buf.size()); |
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} catch ( ... ) {} // sanity check, discard invalid entries |
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} |
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|
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} // namespace ZeroTier
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