From 3a1ec07db0d30415a21ab05be9898210d7cc70ef Mon Sep 17 00:00:00 2001 From: Adam Ierymenko Date: Mon, 17 Jul 2017 10:43:28 -0700 Subject: [PATCH] Remove some exception copypasta. --- node/IncomingPacket.cpp | 1784 +++++++++++++++++++-------------------- 1 file changed, 869 insertions(+), 915 deletions(-) diff --git a/node/IncomingPacket.cpp b/node/IncomingPacket.cpp index 94c73f81f..9489b16e0 100644 --- a/node/IncomingPacket.cpp +++ b/node/IncomingPacket.cpp @@ -129,214 +129,341 @@ bool IncomingPacket::tryDecode(const RuntimeEnvironment *RR,void *tPtr) bool IncomingPacket::_doERROR(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const Packet::Verb inReVerb = (Packet::Verb)(*this)[ZT_PROTO_VERB_ERROR_IDX_IN_RE_VERB]; - const uint64_t inRePacketId = at(ZT_PROTO_VERB_ERROR_IDX_IN_RE_PACKET_ID); - const Packet::ErrorCode errorCode = (Packet::ErrorCode)(*this)[ZT_PROTO_VERB_ERROR_IDX_ERROR_CODE]; - uint64_t networkId = 0; + const Packet::Verb inReVerb = (Packet::Verb)(*this)[ZT_PROTO_VERB_ERROR_IDX_IN_RE_VERB]; + const uint64_t inRePacketId = at(ZT_PROTO_VERB_ERROR_IDX_IN_RE_PACKET_ID); + const Packet::ErrorCode errorCode = (Packet::ErrorCode)(*this)[ZT_PROTO_VERB_ERROR_IDX_ERROR_CODE]; + uint64_t networkId = 0; - /* Security note: we do not gate doERROR() with expectingReplyTo() to - * avoid having to log every outgoing packet ID. Instead we put the - * logic to determine whether we should consider an ERROR in each - * error handler. In most cases these are only trusted in specific - * circumstances. */ + /* Security note: we do not gate doERROR() with expectingReplyTo() to + * avoid having to log every outgoing packet ID. Instead we put the + * logic to determine whether we should consider an ERROR in each + * error handler. In most cases these are only trusted in specific + * circumstances. */ - switch(errorCode) { + switch(errorCode) { - case Packet::ERROR_OBJ_NOT_FOUND: - // Object not found, currently only meaningful from network controllers. - if (inReVerb == Packet::VERB_NETWORK_CONFIG_REQUEST) { - const SharedPtr network(RR->node->network(at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD))); - if ((network)&&(network->controller() == peer->address())) - network->setNotFound(); - } - break; - - case Packet::ERROR_UNSUPPORTED_OPERATION: - // This can be sent in response to any operation, though right now we only - // consider it meaningful from network controllers. This would indicate - // that the queried node does not support acting as a controller. - if (inReVerb == Packet::VERB_NETWORK_CONFIG_REQUEST) { - const SharedPtr network(RR->node->network(at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD))); - if ((network)&&(network->controller() == peer->address())) - network->setNotFound(); - } - break; - - case Packet::ERROR_IDENTITY_COLLISION: - // FIXME: for federation this will need a payload with a signature or something. - if (RR->topology->isUpstream(peer->identity())) - RR->node->postEvent(tPtr,ZT_EVENT_FATAL_ERROR_IDENTITY_COLLISION); - break; - - case Packet::ERROR_NEED_MEMBERSHIP_CERTIFICATE: { - // Peers can send this in response to frames if they do not have a recent enough COM from us - networkId = at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD); - const SharedPtr network(RR->node->network(networkId)); - const uint64_t now = RR->node->now(); - if ( (network) && (network->config().com) && (peer->rateGateIncomingComRequest(now)) ) - network->pushCredentialsNow(tPtr,peer->address(),now); - } break; - - case Packet::ERROR_NETWORK_ACCESS_DENIED_: { - // Network controller: network access denied. + case Packet::ERROR_OBJ_NOT_FOUND: + // Object not found, currently only meaningful from network controllers. + if (inReVerb == Packet::VERB_NETWORK_CONFIG_REQUEST) { const SharedPtr network(RR->node->network(at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD))); if ((network)&&(network->controller() == peer->address())) - network->setAccessDenied(); - } break; + network->setNotFound(); + } + break; - case Packet::ERROR_UNWANTED_MULTICAST: { - // Members of networks can use this error to indicate that they no longer - // want to receive multicasts on a given channel. - networkId = at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD); - const SharedPtr network(RR->node->network(networkId)); - if ((network)&&(network->gate(tPtr,peer))) { - const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD + 8,6),6),at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD + 14)); - RR->mc->remove(network->id(),mg,peer->address()); - } - } break; + case Packet::ERROR_UNSUPPORTED_OPERATION: + // This can be sent in response to any operation, though right now we only + // consider it meaningful from network controllers. This would indicate + // that the queried node does not support acting as a controller. + if (inReVerb == Packet::VERB_NETWORK_CONFIG_REQUEST) { + const SharedPtr network(RR->node->network(at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD))); + if ((network)&&(network->controller() == peer->address())) + network->setNotFound(); + } + break; - default: break; - } + case Packet::ERROR_IDENTITY_COLLISION: + // FIXME: for federation this will need a payload with a signature or something. + if (RR->topology->isUpstream(peer->identity())) + RR->node->postEvent(tPtr,ZT_EVENT_FATAL_ERROR_IDENTITY_COLLISION); + break; - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_ERROR,inRePacketId,inReVerb,false,networkId); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_ERROR,"unexpected exception"); + case Packet::ERROR_NEED_MEMBERSHIP_CERTIFICATE: { + // Peers can send this in response to frames if they do not have a recent enough COM from us + networkId = at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD); + const SharedPtr network(RR->node->network(networkId)); + const uint64_t now = RR->node->now(); + if ( (network) && (network->config().com) && (peer->rateGateIncomingComRequest(now)) ) + network->pushCredentialsNow(tPtr,peer->address(),now); + } break; + + case Packet::ERROR_NETWORK_ACCESS_DENIED_: { + // Network controller: network access denied. + const SharedPtr network(RR->node->network(at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD))); + if ((network)&&(network->controller() == peer->address())) + network->setAccessDenied(); + } break; + + case Packet::ERROR_UNWANTED_MULTICAST: { + // Members of networks can use this error to indicate that they no longer + // want to receive multicasts on a given channel. + networkId = at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD); + const SharedPtr network(RR->node->network(networkId)); + if ((network)&&(network->gate(tPtr,peer))) { + const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD + 8,6),6),at(ZT_PROTO_VERB_ERROR_IDX_PAYLOAD + 14)); + RR->mc->remove(network->id(),mg,peer->address()); + } + } break; + + default: break; } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_ERROR,inRePacketId,inReVerb,false,networkId); + return true; } bool IncomingPacket::_doHELLO(const RuntimeEnvironment *RR,void *tPtr,const bool alreadyAuthenticated) { - try { - const uint64_t now = RR->node->now(); + const uint64_t now = RR->node->now(); - const uint64_t pid = packetId(); - const Address fromAddress(source()); - const unsigned int protoVersion = (*this)[ZT_PROTO_VERB_HELLO_IDX_PROTOCOL_VERSION]; - const unsigned int vMajor = (*this)[ZT_PROTO_VERB_HELLO_IDX_MAJOR_VERSION]; - const unsigned int vMinor = (*this)[ZT_PROTO_VERB_HELLO_IDX_MINOR_VERSION]; - const unsigned int vRevision = at(ZT_PROTO_VERB_HELLO_IDX_REVISION); - const uint64_t timestamp = at(ZT_PROTO_VERB_HELLO_IDX_TIMESTAMP); - Identity id; - unsigned int ptr = ZT_PROTO_VERB_HELLO_IDX_IDENTITY + id.deserialize(*this,ZT_PROTO_VERB_HELLO_IDX_IDENTITY); + const uint64_t pid = packetId(); + const Address fromAddress(source()); + const unsigned int protoVersion = (*this)[ZT_PROTO_VERB_HELLO_IDX_PROTOCOL_VERSION]; + const unsigned int vMajor = (*this)[ZT_PROTO_VERB_HELLO_IDX_MAJOR_VERSION]; + const unsigned int vMinor = (*this)[ZT_PROTO_VERB_HELLO_IDX_MINOR_VERSION]; + const unsigned int vRevision = at(ZT_PROTO_VERB_HELLO_IDX_REVISION); + const uint64_t timestamp = at(ZT_PROTO_VERB_HELLO_IDX_TIMESTAMP); + Identity id; + unsigned int ptr = ZT_PROTO_VERB_HELLO_IDX_IDENTITY + id.deserialize(*this,ZT_PROTO_VERB_HELLO_IDX_IDENTITY); - if (protoVersion < ZT_PROTO_VERSION_MIN) { - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"protocol version too old"); - return true; - } - if (fromAddress != id.address()) { - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"identity/address mismatch"); - return true; - } + if (protoVersion < ZT_PROTO_VERSION_MIN) { + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"protocol version too old"); + return true; + } + if (fromAddress != id.address()) { + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"identity/address mismatch"); + return true; + } - SharedPtr peer(RR->topology->getPeer(tPtr,id.address())); - if (peer) { - // We already have an identity with this address -- check for collisions - if (!alreadyAuthenticated) { - if (peer->identity() != id) { - // Identity is different from the one we already have -- address collision + SharedPtr peer(RR->topology->getPeer(tPtr,id.address())); + if (peer) { + // We already have an identity with this address -- check for collisions + if (!alreadyAuthenticated) { + if (peer->identity() != id) { + // Identity is different from the one we already have -- address collision - // Check rate limits - if (!RR->node->rateGateIdentityVerification(now,_path->address())) - return true; + // Check rate limits + if (!RR->node->rateGateIdentityVerification(now,_path->address())) + return true; - uint8_t key[ZT_PEER_SECRET_KEY_LENGTH]; - if (RR->identity.agree(id,key,ZT_PEER_SECRET_KEY_LENGTH)) { - if (dearmor(key)) { // ensure packet is authentic, otherwise drop - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"address collision"); - Packet outp(id.address(),RR->identity.address(),Packet::VERB_ERROR); - outp.append((uint8_t)Packet::VERB_HELLO); - outp.append((uint64_t)pid); - outp.append((uint8_t)Packet::ERROR_IDENTITY_COLLISION); - outp.armor(key,true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } else { - RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); - } + uint8_t key[ZT_PEER_SECRET_KEY_LENGTH]; + if (RR->identity.agree(id,key,ZT_PEER_SECRET_KEY_LENGTH)) { + if (dearmor(key)) { // ensure packet is authentic, otherwise drop + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"address collision"); + Packet outp(id.address(),RR->identity.address(),Packet::VERB_ERROR); + outp.append((uint8_t)Packet::VERB_HELLO); + outp.append((uint64_t)pid); + outp.append((uint8_t)Packet::ERROR_IDENTITY_COLLISION); + outp.armor(key,true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); } else { RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); } - - return true; } else { - // Identity is the same as the one we already have -- check packet integrity - - if (!dearmor(peer->key())) { - RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); - return true; - } - - // Continue at // VALID + RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); } - } // else if alreadyAuthenticated then continue at // VALID - } else { - // We don't already have an identity with this address -- validate and learn it - // Sanity check: this basically can't happen - if (alreadyAuthenticated) { - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"illegal alreadyAuthenticated state"); return true; + } else { + // Identity is the same as the one we already have -- check packet integrity + + if (!dearmor(peer->key())) { + RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); + return true; + } + + // Continue at // VALID } + } // else if alreadyAuthenticated then continue at // VALID + } else { + // We don't already have an identity with this address -- validate and learn it - // Check rate limits - if (!RR->node->rateGateIdentityVerification(now,_path->address())) { - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"rate limit exceeded"); - return true; - } - - // Check packet integrity and MAC (this is faster than locallyValidate() so do it first to filter out total crap) - SharedPtr newPeer(new Peer(RR,RR->identity,id)); - if (!dearmor(newPeer->key())) { - RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); - return true; - } - - // Check that identity's address is valid as per the derivation function - if (!id.locallyValidate()) { - RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"invalid identity"); - return true; - } - - peer = RR->topology->addPeer(tPtr,newPeer); - - // Continue at // VALID + // Sanity check: this basically can't happen + if (alreadyAuthenticated) { + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"illegal alreadyAuthenticated state"); + return true; } - // VALID -- if we made it here, packet passed identity and authenticity checks! - - // Get external surface address if present (was not in old versions) - InetAddress externalSurfaceAddress; - if (ptr < size()) { - ptr += externalSurfaceAddress.deserialize(*this,ptr); - if ((externalSurfaceAddress)&&(hops() == 0)) - RR->sa->iam(tPtr,id.address(),_path->localSocket(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(id),now); + // Check rate limits + if (!RR->node->rateGateIdentityVerification(now,_path->address())) { + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"rate limit exceeded"); + return true; } - // Get primary planet world ID and world timestamp if present - uint64_t planetWorldId = 0; - uint64_t planetWorldTimestamp = 0; - if ((ptr + 16) <= size()) { - planetWorldId = at(ptr); ptr += 8; - planetWorldTimestamp = at(ptr); ptr += 8; + // Check packet integrity and MAC (this is faster than locallyValidate() so do it first to filter out total crap) + SharedPtr newPeer(new Peer(RR,RR->identity,id)); + if (!dearmor(newPeer->key())) { + RR->t->incomingPacketMessageAuthenticationFailure(tPtr,_path,pid,fromAddress,hops()); + return true; } - std::vector< std::pair > moonIdsAndTimestamps; - if (ptr < size()) { - // Remainder of packet, if present, is encrypted - cryptField(peer->key(),ptr,size() - ptr); + // Check that identity's address is valid as per the derivation function + if (!id.locallyValidate()) { + RR->t->incomingPacketDroppedHELLO(tPtr,_path,pid,fromAddress,"invalid identity"); + return true; + } - // Get moon IDs and timestamps if present + peer = RR->topology->addPeer(tPtr,newPeer); + + // Continue at // VALID + } + + // VALID -- if we made it here, packet passed identity and authenticity checks! + + // Get external surface address if present (was not in old versions) + InetAddress externalSurfaceAddress; + if (ptr < size()) { + ptr += externalSurfaceAddress.deserialize(*this,ptr); + if ((externalSurfaceAddress)&&(hops() == 0)) + RR->sa->iam(tPtr,id.address(),_path->localSocket(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(id),now); + } + + // Get primary planet world ID and world timestamp if present + uint64_t planetWorldId = 0; + uint64_t planetWorldTimestamp = 0; + if ((ptr + 16) <= size()) { + planetWorldId = at(ptr); ptr += 8; + planetWorldTimestamp = at(ptr); ptr += 8; + } + + std::vector< std::pair > moonIdsAndTimestamps; + if (ptr < size()) { + // Remainder of packet, if present, is encrypted + cryptField(peer->key(),ptr,size() - ptr); + + // Get moon IDs and timestamps if present + if ((ptr + 2) <= size()) { + const unsigned int numMoons = at(ptr); ptr += 2; + for(unsigned int i=0;i(at(ptr),at(ptr + 8))); + ptr += 16; + } + } + + // Handle COR if present (older versions don't send this) + if ((ptr + 2) <= size()) { + if (at(ptr) > 0) { + CertificateOfRepresentation cor; + ptr += 2; + ptr += cor.deserialize(*this,ptr); + } else ptr += 2; + } + } + + // Send OK(HELLO) with an echo of the packet's timestamp and some of the same + // information about us: version, sent-to address, etc. + + Packet outp(id.address(),RR->identity.address(),Packet::VERB_OK); + outp.append((unsigned char)Packet::VERB_HELLO); + outp.append((uint64_t)pid); + outp.append((uint64_t)timestamp); + 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); + + if (protoVersion >= 5) { + _path->address().serialize(outp); + } else { + /* LEGACY COMPATIBILITY HACK: + * + * For a while now (since 1.0.3), ZeroTier has recognized changes in + * its network environment empirically by examining its external network + * address as reported by trusted peers. In versions prior to 1.1.0 + * (protocol version < 5), they did this by saving a snapshot of this + * information (in SelfAwareness.hpp) keyed by reporting device ID and + * address type. + * + * This causes problems when clustering is combined with symmetric NAT. + * Symmetric NAT remaps ports, so different endpoints in a cluster will + * report back different exterior addresses. Since the old code keys + * this by device ID and not sending physical address and compares the + * entire address including port, it constantly thinks its external + * surface is changing and resets connections when talking to a cluster. + * + * In new code we key by sending physical address and device and we also + * take the more conservative position of only interpreting changes in + * IP address (neglecting port) as a change in network topology that + * necessitates a reset. But we can make older clients work here by + * nulling out the port field. Since this info is only used for empirical + * detection of link changes, it doesn't break anything else. + */ + InetAddress tmpa(_path->address()); + tmpa.setPort(0); + tmpa.serialize(outp); + } + + const unsigned int worldUpdateSizeAt = outp.size(); + outp.addSize(2); // make room for 16-bit size field + if ((planetWorldId)&&(RR->topology->planetWorldTimestamp() > planetWorldTimestamp)&&(planetWorldId == RR->topology->planetWorldId())) { + RR->topology->planet().serialize(outp,false); + } + if (moonIdsAndTimestamps.size() > 0) { + std::vector moons(RR->topology->moons()); + for(std::vector::const_iterator m(moons.begin());m!=moons.end();++m) { + for(std::vector< std::pair >::const_iterator i(moonIdsAndTimestamps.begin());i!=moonIdsAndTimestamps.end();++i) { + if (i->first == m->id()) { + if (m->timestamp() > i->second) + m->serialize(outp,false); + break; + } + } + } + } + outp.setAt(worldUpdateSizeAt,(uint16_t)(outp.size() - (worldUpdateSizeAt + 2))); + + const unsigned int corSizeAt = outp.size(); + outp.addSize(2); + RR->topology->appendCertificateOfRepresentation(outp); + outp.setAt(corSizeAt,(uint16_t)(outp.size() - (corSizeAt + 2))); + + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),now); + + peer->setRemoteVersion(protoVersion,vMajor,vMinor,vRevision); // important for this to go first so received() knows the version + peer->received(tPtr,_path,hops(),pid,Packet::VERB_HELLO,0,Packet::VERB_NOP,false,0); + + return true; +} + +bool IncomingPacket::_doOK(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) +{ + const Packet::Verb inReVerb = (Packet::Verb)(*this)[ZT_PROTO_VERB_OK_IDX_IN_RE_VERB]; + const uint64_t inRePacketId = at(ZT_PROTO_VERB_OK_IDX_IN_RE_PACKET_ID); + uint64_t networkId = 0; + + if (!RR->node->expectingReplyTo(inRePacketId)) + return true; + + switch(inReVerb) { + + case Packet::VERB_HELLO: { + const uint64_t latency = RR->node->now() - at(ZT_PROTO_VERB_HELLO__OK__IDX_TIMESTAMP); + if (latency > ZT_HELLO_MAX_ALLOWABLE_LATENCY) + return true; + + const unsigned int vProto = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_PROTOCOL_VERSION]; + const unsigned int vMajor = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_MAJOR_VERSION]; + const unsigned int vMinor = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_MINOR_VERSION]; + const unsigned int vRevision = at(ZT_PROTO_VERB_HELLO__OK__IDX_REVISION); + if (vProto < ZT_PROTO_VERSION_MIN) + return true; + + InetAddress externalSurfaceAddress; + unsigned int ptr = ZT_PROTO_VERB_HELLO__OK__IDX_REVISION + 2; + + // Get reported external surface address if present + if (ptr < size()) + ptr += externalSurfaceAddress.deserialize(*this,ptr); + + // Handle planet or moon updates if present if ((ptr + 2) <= size()) { - const unsigned int numMoons = at(ptr); ptr += 2; - for(unsigned int i=0;i(at(ptr),at(ptr + 8))); - ptr += 16; + const unsigned int worldsLen = at(ptr); ptr += 2; + if (RR->topology->shouldAcceptWorldUpdateFrom(peer->address())) { + const unsigned int endOfWorlds = ptr + worldsLen; + while (ptr < endOfWorlds) { + World w; + ptr += w.deserialize(*this,ptr); + RR->topology->addWorld(tPtr,w,false); + } + } else { + ptr += worldsLen; } } - // Handle COR if present (older versions don't send this) + // Handle certificate of representation if present if ((ptr + 2) <= size()) { if (at(ptr) > 0) { CertificateOfRepresentation cor; @@ -344,891 +471,718 @@ bool IncomingPacket::_doHELLO(const RuntimeEnvironment *RR,void *tPtr,const bool ptr += cor.deserialize(*this,ptr); } else ptr += 2; } - } - // Send OK(HELLO) with an echo of the packet's timestamp and some of the same - // information about us: version, sent-to address, etc. + if (!hops()) + peer->addDirectLatencyMeasurment((unsigned int)latency); + peer->setRemoteVersion(vProto,vMajor,vMinor,vRevision); - Packet outp(id.address(),RR->identity.address(),Packet::VERB_OK); - outp.append((unsigned char)Packet::VERB_HELLO); - outp.append((uint64_t)pid); - outp.append((uint64_t)timestamp); - 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); + if ((externalSurfaceAddress)&&(hops() == 0)) + RR->sa->iam(tPtr,peer->address(),_path->localSocket(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(peer->identity()),RR->node->now()); + } break; - if (protoVersion >= 5) { - _path->address().serialize(outp); - } else { - /* LEGACY COMPATIBILITY HACK: - * - * For a while now (since 1.0.3), ZeroTier has recognized changes in - * its network environment empirically by examining its external network - * address as reported by trusted peers. In versions prior to 1.1.0 - * (protocol version < 5), they did this by saving a snapshot of this - * information (in SelfAwareness.hpp) keyed by reporting device ID and - * address type. - * - * This causes problems when clustering is combined with symmetric NAT. - * Symmetric NAT remaps ports, so different endpoints in a cluster will - * report back different exterior addresses. Since the old code keys - * this by device ID and not sending physical address and compares the - * entire address including port, it constantly thinks its external - * surface is changing and resets connections when talking to a cluster. - * - * In new code we key by sending physical address and device and we also - * take the more conservative position of only interpreting changes in - * IP address (neglecting port) as a change in network topology that - * necessitates a reset. But we can make older clients work here by - * nulling out the port field. Since this info is only used for empirical - * detection of link changes, it doesn't break anything else. - */ - InetAddress tmpa(_path->address()); - tmpa.setPort(0); - tmpa.serialize(outp); - } + case Packet::VERB_WHOIS: + if (RR->topology->isUpstream(peer->identity())) { + const Identity id(*this,ZT_PROTO_VERB_WHOIS__OK__IDX_IDENTITY); + RR->sw->doAnythingWaitingForPeer(tPtr,RR->topology->addPeer(tPtr,SharedPtr(new Peer(RR,RR->identity,id)))); + } + break; - const unsigned int worldUpdateSizeAt = outp.size(); - outp.addSize(2); // make room for 16-bit size field - if ((planetWorldId)&&(RR->topology->planetWorldTimestamp() > planetWorldTimestamp)&&(planetWorldId == RR->topology->planetWorldId())) { - RR->topology->planet().serialize(outp,false); - } - if (moonIdsAndTimestamps.size() > 0) { - std::vector moons(RR->topology->moons()); - for(std::vector::const_iterator m(moons.begin());m!=moons.end();++m) { - for(std::vector< std::pair >::const_iterator i(moonIdsAndTimestamps.begin());i!=moonIdsAndTimestamps.end();++i) { - if (i->first == m->id()) { - if (m->timestamp() > i->second) - m->serialize(outp,false); - break; - } + case Packet::VERB_NETWORK_CONFIG_REQUEST: { + networkId = at(ZT_PROTO_VERB_OK_IDX_PAYLOAD); + const SharedPtr network(RR->node->network(networkId)); + if (network) + network->handleConfigChunk(tPtr,packetId(),source(),*this,ZT_PROTO_VERB_OK_IDX_PAYLOAD); + } break; + + case Packet::VERB_MULTICAST_GATHER: { + networkId = at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_NETWORK_ID); + const SharedPtr network(RR->node->network(networkId)); + if (network) { + const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_ADI)); + const unsigned int count = at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS + 4); + RR->mc->addMultiple(tPtr,RR->node->now(),networkId,mg,field(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS + 6,count * 5),count,at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS)); + } + } break; + + case Packet::VERB_MULTICAST_FRAME: { + const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_FLAGS]; + networkId = at(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_NETWORK_ID); + const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_ADI)); + + const SharedPtr network(RR->node->network(networkId)); + if (network) { + unsigned int offset = 0; + + if ((flags & 0x01) != 0) { // deprecated but still used by older peers + CertificateOfMembership com; + offset += com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_COM_AND_GATHER_RESULTS); + if (com) + network->addCredential(tPtr,com); + } + + if ((flags & 0x02) != 0) { + // OK(MULTICAST_FRAME) includes implicit gather results + offset += ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_COM_AND_GATHER_RESULTS; + unsigned int totalKnown = at(offset); offset += 4; + unsigned int count = at(offset); offset += 2; + RR->mc->addMultiple(tPtr,RR->node->now(),networkId,mg,field(offset,count * 5),count,totalKnown); } } - } - outp.setAt(worldUpdateSizeAt,(uint16_t)(outp.size() - (worldUpdateSizeAt + 2))); + } break; - const unsigned int corSizeAt = outp.size(); - outp.addSize(2); - RR->topology->appendCertificateOfRepresentation(outp); - outp.setAt(corSizeAt,(uint16_t)(outp.size() - (corSizeAt + 2))); - - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),now); - - peer->setRemoteVersion(protoVersion,vMajor,vMinor,vRevision); // important for this to go first so received() knows the version - peer->received(tPtr,_path,hops(),pid,Packet::VERB_HELLO,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_HELLO,"unexpected exception"); + default: break; } - return true; -} -bool IncomingPacket::_doOK(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) -{ - try { - const Packet::Verb inReVerb = (Packet::Verb)(*this)[ZT_PROTO_VERB_OK_IDX_IN_RE_VERB]; - const uint64_t inRePacketId = at(ZT_PROTO_VERB_OK_IDX_IN_RE_PACKET_ID); - uint64_t networkId = 0; + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_OK,inRePacketId,inReVerb,false,networkId); - if (!RR->node->expectingReplyTo(inRePacketId)) - return true; - - switch(inReVerb) { - - case Packet::VERB_HELLO: { - const uint64_t latency = RR->node->now() - at(ZT_PROTO_VERB_HELLO__OK__IDX_TIMESTAMP); - if (latency > ZT_HELLO_MAX_ALLOWABLE_LATENCY) - return true; - - const unsigned int vProto = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_PROTOCOL_VERSION]; - const unsigned int vMajor = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_MAJOR_VERSION]; - const unsigned int vMinor = (*this)[ZT_PROTO_VERB_HELLO__OK__IDX_MINOR_VERSION]; - const unsigned int vRevision = at(ZT_PROTO_VERB_HELLO__OK__IDX_REVISION); - if (vProto < ZT_PROTO_VERSION_MIN) - return true; - - InetAddress externalSurfaceAddress; - unsigned int ptr = ZT_PROTO_VERB_HELLO__OK__IDX_REVISION + 2; - - // Get reported external surface address if present - if (ptr < size()) - ptr += externalSurfaceAddress.deserialize(*this,ptr); - - // Handle planet or moon updates if present - if ((ptr + 2) <= size()) { - const unsigned int worldsLen = at(ptr); ptr += 2; - if (RR->topology->shouldAcceptWorldUpdateFrom(peer->address())) { - const unsigned int endOfWorlds = ptr + worldsLen; - while (ptr < endOfWorlds) { - World w; - ptr += w.deserialize(*this,ptr); - RR->topology->addWorld(tPtr,w,false); - } - } else { - ptr += worldsLen; - } - } - - // Handle certificate of representation if present - if ((ptr + 2) <= size()) { - if (at(ptr) > 0) { - CertificateOfRepresentation cor; - ptr += 2; - ptr += cor.deserialize(*this,ptr); - } else ptr += 2; - } - - if (!hops()) - peer->addDirectLatencyMeasurment((unsigned int)latency); - peer->setRemoteVersion(vProto,vMajor,vMinor,vRevision); - - if ((externalSurfaceAddress)&&(hops() == 0)) - RR->sa->iam(tPtr,peer->address(),_path->localSocket(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(peer->identity()),RR->node->now()); - } break; - - case Packet::VERB_WHOIS: - if (RR->topology->isUpstream(peer->identity())) { - const Identity id(*this,ZT_PROTO_VERB_WHOIS__OK__IDX_IDENTITY); - RR->sw->doAnythingWaitingForPeer(tPtr,RR->topology->addPeer(tPtr,SharedPtr(new Peer(RR,RR->identity,id)))); - } - break; - - case Packet::VERB_NETWORK_CONFIG_REQUEST: { - networkId = at(ZT_PROTO_VERB_OK_IDX_PAYLOAD); - const SharedPtr network(RR->node->network(networkId)); - if (network) - network->handleConfigChunk(tPtr,packetId(),source(),*this,ZT_PROTO_VERB_OK_IDX_PAYLOAD); - } break; - - case Packet::VERB_MULTICAST_GATHER: { - networkId = at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_NETWORK_ID); - const SharedPtr network(RR->node->network(networkId)); - if (network) { - const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_ADI)); - const unsigned int count = at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS + 4); - RR->mc->addMultiple(tPtr,RR->node->now(),networkId,mg,field(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS + 6,count * 5),count,at(ZT_PROTO_VERB_MULTICAST_GATHER__OK__IDX_GATHER_RESULTS)); - } - } break; - - case Packet::VERB_MULTICAST_FRAME: { - const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_FLAGS]; - networkId = at(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_NETWORK_ID); - const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_ADI)); - - const SharedPtr network(RR->node->network(networkId)); - if (network) { - unsigned int offset = 0; - - if ((flags & 0x01) != 0) { // deprecated but still used by older peers - CertificateOfMembership com; - offset += com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_COM_AND_GATHER_RESULTS); - if (com) - network->addCredential(tPtr,com); - } - - if ((flags & 0x02) != 0) { - // OK(MULTICAST_FRAME) includes implicit gather results - offset += ZT_PROTO_VERB_MULTICAST_FRAME__OK__IDX_COM_AND_GATHER_RESULTS; - unsigned int totalKnown = at(offset); offset += 4; - unsigned int count = at(offset); offset += 2; - RR->mc->addMultiple(tPtr,RR->node->now(),networkId,mg,field(offset,count * 5),count,totalKnown); - } - } - } break; - - default: break; - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_OK,inRePacketId,inReVerb,false,networkId); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_OK,"unexpected exception"); - } return true; } bool IncomingPacket::_doWHOIS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - if ((!RR->topology->amRoot())&&(!peer->rateGateInboundWhoisRequest(RR->node->now()))) - return true; + if ((!RR->topology->amRoot())&&(!peer->rateGateInboundWhoisRequest(RR->node->now()))) + return true; - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); - outp.append((unsigned char)Packet::VERB_WHOIS); - outp.append(packetId()); + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); + outp.append((unsigned char)Packet::VERB_WHOIS); + outp.append(packetId()); - unsigned int count = 0; - unsigned int ptr = ZT_PACKET_IDX_PAYLOAD; - while ((ptr + ZT_ADDRESS_LENGTH) <= size()) { - const Address addr(field(ptr,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); - ptr += ZT_ADDRESS_LENGTH; + unsigned int count = 0; + unsigned int ptr = ZT_PACKET_IDX_PAYLOAD; + while ((ptr + ZT_ADDRESS_LENGTH) <= size()) { + const Address addr(field(ptr,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); + ptr += ZT_ADDRESS_LENGTH; - const Identity id(RR->topology->getIdentity(tPtr,addr)); - if (id) { - id.serialize(outp,false); - ++count; - } else { - // Request unknown WHOIS from upstream from us (if we have one) - RR->sw->requestWhois(tPtr,addr); - } + const Identity id(RR->topology->getIdentity(tPtr,addr)); + if (id) { + id.serialize(outp,false); + ++count; + } else { + // Request unknown WHOIS from upstream from us (if we have one) + RR->sw->requestWhois(tPtr,addr); } - - if (count > 0) { - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_WHOIS,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_WHOIS,"unexpected exception"); } + + if (count > 0) { + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_WHOIS,0,Packet::VERB_NOP,false,0); + return true; } bool IncomingPacket::_doRENDEZVOUS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - if (RR->topology->isUpstream(peer->identity())) { - const Address with(field(ZT_PROTO_VERB_RENDEZVOUS_IDX_ZTADDRESS,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); - const SharedPtr rendezvousWith(RR->topology->getPeer(tPtr,with)); - if (rendezvousWith) { - const unsigned int port = at(ZT_PROTO_VERB_RENDEZVOUS_IDX_PORT); - const unsigned int addrlen = (*this)[ZT_PROTO_VERB_RENDEZVOUS_IDX_ADDRLEN]; - if ((port > 0)&&((addrlen == 4)||(addrlen == 16))) { - const InetAddress atAddr(field(ZT_PROTO_VERB_RENDEZVOUS_IDX_ADDRESS,addrlen),addrlen,port); - if (RR->node->shouldUsePathForZeroTierTraffic(tPtr,with,_path->localSocket(),atAddr)) { - const uint64_t junk = RR->node->prng(); - RR->node->putPacket(tPtr,_path->localSocket(),atAddr,&junk,4,2); // send low-TTL junk packet to 'open' local NAT(s) and stateful firewalls - rendezvousWith->attemptToContactAt(tPtr,_path->localSocket(),atAddr,RR->node->now(),false,0); - } + if (RR->topology->isUpstream(peer->identity())) { + const Address with(field(ZT_PROTO_VERB_RENDEZVOUS_IDX_ZTADDRESS,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); + const SharedPtr rendezvousWith(RR->topology->getPeer(tPtr,with)); + if (rendezvousWith) { + const unsigned int port = at(ZT_PROTO_VERB_RENDEZVOUS_IDX_PORT); + const unsigned int addrlen = (*this)[ZT_PROTO_VERB_RENDEZVOUS_IDX_ADDRLEN]; + if ((port > 0)&&((addrlen == 4)||(addrlen == 16))) { + const InetAddress atAddr(field(ZT_PROTO_VERB_RENDEZVOUS_IDX_ADDRESS,addrlen),addrlen,port); + if (RR->node->shouldUsePathForZeroTierTraffic(tPtr,with,_path->localSocket(),atAddr)) { + const uint64_t junk = RR->node->prng(); + RR->node->putPacket(tPtr,_path->localSocket(),atAddr,&junk,4,2); // send low-TTL junk packet to 'open' local NAT(s) and stateful firewalls + rendezvousWith->attemptToContactAt(tPtr,_path->localSocket(),atAddr,RR->node->now(),false,0); } } } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_RENDEZVOUS,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_RENDEZVOUS,"unexpected exception"); } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_RENDEZVOUS,0,Packet::VERB_NOP,false,0); + return true; } bool IncomingPacket::_doFRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t nwid = at(ZT_PROTO_VERB_FRAME_IDX_NETWORK_ID); - const SharedPtr network(RR->node->network(nwid)); - bool trustEstablished = false; - if (network) { - if (network->gate(tPtr,peer)) { - trustEstablished = true; - if (size() > ZT_PROTO_VERB_FRAME_IDX_PAYLOAD) { - const unsigned int etherType = at(ZT_PROTO_VERB_FRAME_IDX_ETHERTYPE); - const MAC sourceMac(peer->address(),nwid); - const unsigned int frameLen = size() - ZT_PROTO_VERB_FRAME_IDX_PAYLOAD; - const uint8_t *const frameData = reinterpret_cast(data()) + ZT_PROTO_VERB_FRAME_IDX_PAYLOAD; - if (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),sourceMac,network->mac(),frameData,frameLen,etherType,0) > 0) - RR->node->putFrame(tPtr,nwid,network->userPtr(),sourceMac,network->mac(),etherType,0,(const void *)frameData,frameLen); - } - } else { - _sendErrorNeedCredentials(RR,tPtr,peer,nwid); - RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_FRAME,true); + const uint64_t nwid = at(ZT_PROTO_VERB_FRAME_IDX_NETWORK_ID); + const SharedPtr network(RR->node->network(nwid)); + bool trustEstablished = false; + if (network) { + if (network->gate(tPtr,peer)) { + trustEstablished = true; + if (size() > ZT_PROTO_VERB_FRAME_IDX_PAYLOAD) { + const unsigned int etherType = at(ZT_PROTO_VERB_FRAME_IDX_ETHERTYPE); + const MAC sourceMac(peer->address(),nwid); + const unsigned int frameLen = size() - ZT_PROTO_VERB_FRAME_IDX_PAYLOAD; + const uint8_t *const frameData = reinterpret_cast(data()) + ZT_PROTO_VERB_FRAME_IDX_PAYLOAD; + if (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),sourceMac,network->mac(),frameData,frameLen,etherType,0) > 0) + RR->node->putFrame(tPtr,nwid,network->userPtr(),sourceMac,network->mac(),etherType,0,(const void *)frameData,frameLen); } } else { _sendErrorNeedCredentials(RR,tPtr,peer,nwid); + RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_FRAME,true); } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_FRAME,0,Packet::VERB_NOP,trustEstablished,nwid); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_FRAME,"unexpected exception"); + } else { + _sendErrorNeedCredentials(RR,tPtr,peer,nwid); } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_FRAME,0,Packet::VERB_NOP,trustEstablished,nwid); + return true; } bool IncomingPacket::_doEXT_FRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t nwid = at(ZT_PROTO_VERB_EXT_FRAME_IDX_NETWORK_ID); - const SharedPtr network(RR->node->network(nwid)); - if (network) { - const unsigned int flags = (*this)[ZT_PROTO_VERB_EXT_FRAME_IDX_FLAGS]; + const uint64_t nwid = at(ZT_PROTO_VERB_EXT_FRAME_IDX_NETWORK_ID); + const SharedPtr network(RR->node->network(nwid)); + if (network) { + const unsigned int flags = (*this)[ZT_PROTO_VERB_EXT_FRAME_IDX_FLAGS]; - unsigned int comLen = 0; - if ((flags & 0x01) != 0) { // inline COM with EXT_FRAME is deprecated but still used with old peers - CertificateOfMembership com; - comLen = com.deserialize(*this,ZT_PROTO_VERB_EXT_FRAME_IDX_COM); - if (com) - network->addCredential(tPtr,com); - } + unsigned int comLen = 0; + if ((flags & 0x01) != 0) { // inline COM with EXT_FRAME is deprecated but still used with old peers + CertificateOfMembership com; + comLen = com.deserialize(*this,ZT_PROTO_VERB_EXT_FRAME_IDX_COM); + if (com) + network->addCredential(tPtr,com); + } - if (!network->gate(tPtr,peer)) { - RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,true); - _sendErrorNeedCredentials(RR,tPtr,peer,nwid); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,false,nwid); + if (!network->gate(tPtr,peer)) { + RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,true); + _sendErrorNeedCredentials(RR,tPtr,peer,nwid); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,false,nwid); + return true; + } + + if (size() > ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD) { + const unsigned int etherType = at(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_ETHERTYPE); + const MAC to(field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_TO,ZT_PROTO_VERB_EXT_FRAME_LEN_TO),ZT_PROTO_VERB_EXT_FRAME_LEN_TO); + const MAC from(field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_FROM,ZT_PROTO_VERB_EXT_FRAME_LEN_FROM),ZT_PROTO_VERB_EXT_FRAME_LEN_FROM); + const unsigned int frameLen = size() - (comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD); + const uint8_t *const frameData = (const uint8_t *)field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD,frameLen); + + if ((!from)||(from == network->mac())) { + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay return true; } - if (size() > ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD) { - const unsigned int etherType = at(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_ETHERTYPE); - const MAC to(field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_TO,ZT_PROTO_VERB_EXT_FRAME_LEN_TO),ZT_PROTO_VERB_EXT_FRAME_LEN_TO); - const MAC from(field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_FROM,ZT_PROTO_VERB_EXT_FRAME_LEN_FROM),ZT_PROTO_VERB_EXT_FRAME_LEN_FROM); - const unsigned int frameLen = size() - (comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD); - const uint8_t *const frameData = (const uint8_t *)field(comLen + ZT_PROTO_VERB_EXT_FRAME_IDX_PAYLOAD,frameLen); - - if ((!from)||(from == network->mac())) { - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - - switch (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),from,to,frameData,frameLen,etherType,0)) { - case 1: - if (from != MAC(peer->address(),nwid)) { - if (network->config().permitsBridging(peer->address())) { - network->learnBridgeRoute(from,peer->address()); - } else { - RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"bridging not allowed (remote)"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - } else if (to != network->mac()) { - if (to.isMulticast()) { - if (network->config().multicastLimit == 0) { - RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"multicast disabled"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - } else if (!network->config().permitsBridging(RR->identity.address())) { - RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"bridging not allowed (local)"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } + switch (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),from,to,frameData,frameLen,etherType,0)) { + case 1: + if (from != MAC(peer->address(),nwid)) { + if (network->config().permitsBridging(peer->address())) { + network->learnBridgeRoute(from,peer->address()); + } else { + RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"bridging not allowed (remote)"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; } - // fall through -- 2 means accept regardless of bridging checks or other restrictions - case 2: - RR->node->putFrame(tPtr,nwid,network->userPtr(),from,to,etherType,0,(const void *)frameData,frameLen); - break; - } + } else if (to != network->mac()) { + if (to.isMulticast()) { + if (network->config().multicastLimit == 0) { + RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"multicast disabled"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; + } + } else if (!network->config().permitsBridging(RR->identity.address())) { + RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_EXT_FRAME,from,to,"bridging not allowed (local)"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; + } + } + // fall through -- 2 means accept regardless of bridging checks or other restrictions + case 2: + RR->node->putFrame(tPtr,nwid,network->userPtr(),from,to,etherType,0,(const void *)frameData,frameLen); + break; } - - if ((flags & 0x10) != 0) { // ACK requested - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); - outp.append((uint8_t)Packet::VERB_EXT_FRAME); - outp.append((uint64_t)packetId()); - outp.append((uint64_t)nwid); - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); - } else { - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,false,nwid); } - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_EXT_FRAME,"unexpected exception"); + + if ((flags & 0x10) != 0) { // ACK requested + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); + outp.append((uint8_t)Packet::VERB_EXT_FRAME); + outp.append((uint64_t)packetId()); + outp.append((uint64_t)nwid); + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,true,nwid); + } else { + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_EXT_FRAME,0,Packet::VERB_NOP,false,nwid); } + return true; } bool IncomingPacket::_doECHO(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - if (!peer->rateGateEchoRequest(RR->node->now())) - return true; + if (!peer->rateGateEchoRequest(RR->node->now())) + return true; - const uint64_t pid = packetId(); - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); - outp.append((unsigned char)Packet::VERB_ECHO); - outp.append((uint64_t)pid); - if (size() > ZT_PACKET_IDX_PAYLOAD) - outp.append(reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD,size() - ZT_PACKET_IDX_PAYLOAD); - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + const uint64_t pid = packetId(); + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); + outp.append((unsigned char)Packet::VERB_ECHO); + outp.append((uint64_t)pid); + if (size() > ZT_PACKET_IDX_PAYLOAD) + outp.append(reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD,size() - ZT_PACKET_IDX_PAYLOAD); + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + + peer->received(tPtr,_path,hops(),pid,Packet::VERB_ECHO,0,Packet::VERB_NOP,false,0); - peer->received(tPtr,_path,hops(),pid,Packet::VERB_ECHO,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_ECHO,"unexpected exception"); - } return true; } bool IncomingPacket::_doMULTICAST_LIKE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t now = RR->node->now(); + const uint64_t now = RR->node->now(); - uint64_t authOnNetwork[256]; // cache for approved network IDs - unsigned int authOnNetworkCount = 0; - SharedPtr network; - bool trustEstablished = false; + uint64_t authOnNetwork[256]; // cache for approved network IDs + unsigned int authOnNetworkCount = 0; + SharedPtr network; + bool trustEstablished = false; - // Iterate through 18-byte network,MAC,ADI tuples - for(unsigned int ptr=ZT_PACKET_IDX_PAYLOAD;ptr(ptr); + // Iterate through 18-byte network,MAC,ADI tuples + for(unsigned int ptr=ZT_PACKET_IDX_PAYLOAD;ptr(ptr); - bool auth = false; - for(unsigned int i=0;iid() != nwid)) - network = RR->node->network(nwid); - const bool authOnNet = ((network)&&(network->gate(tPtr,peer))); - if (!authOnNet) - _sendErrorNeedCredentials(RR,tPtr,peer,nwid); - trustEstablished |= authOnNet; - if (authOnNet||RR->mc->cacheAuthorized(peer->address(),nwid,now)) { - auth = true; - if (authOnNetworkCount < 256) // sanity check, packets can't really be this big - authOnNetwork[authOnNetworkCount++] = nwid; - } - } - - if (auth) { - const MulticastGroup group(MAC(field(ptr + 8,6),6),at(ptr + 14)); - RR->mc->add(tPtr,now,nwid,group,peer->address()); + } + if (!auth) { + if ((!network)||(network->id() != nwid)) + network = RR->node->network(nwid); + const bool authOnNet = ((network)&&(network->gate(tPtr,peer))); + if (!authOnNet) + _sendErrorNeedCredentials(RR,tPtr,peer,nwid); + trustEstablished |= authOnNet; + if (authOnNet||RR->mc->cacheAuthorized(peer->address(),nwid,now)) { + auth = true; + if (authOnNetworkCount < 256) // sanity check, packets can't really be this big + authOnNetwork[authOnNetworkCount++] = nwid; } } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_LIKE,0,Packet::VERB_NOP,trustEstablished,(network) ? network->id() : 0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_LIKE,"unexpected exception"); + if (auth) { + const MulticastGroup group(MAC(field(ptr + 8,6),6),at(ptr + 14)); + RR->mc->add(tPtr,now,nwid,group,peer->address()); + } } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_LIKE,0,Packet::VERB_NOP,trustEstablished,(network) ? network->id() : 0); + return true; } bool IncomingPacket::_doNETWORK_CREDENTIALS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - if (!peer->rateGateCredentialsReceived(RR->node->now())) - return true; + if (!peer->rateGateCredentialsReceived(RR->node->now())) + return true; - CertificateOfMembership com; - Capability cap; - Tag tag; - Revocation revocation; - CertificateOfOwnership coo; - bool trustEstablished = false; - SharedPtr network; + CertificateOfMembership com; + Capability cap; + Tag tag; + Revocation revocation; + CertificateOfOwnership coo; + bool trustEstablished = false; + SharedPtr network; - unsigned int p = ZT_PACKET_IDX_PAYLOAD; - while ((p < size())&&((*this)[p] != 0)) { - p += com.deserialize(*this,p); - if (com) { - network = RR->node->network(com.networkId()); - if (network) { - switch (network->addCredential(tPtr,com)) { - case Membership::ADD_REJECTED: - break; - case Membership::ADD_ACCEPTED_NEW: - case Membership::ADD_ACCEPTED_REDUNDANT: - trustEstablished = true; - break; - case Membership::ADD_DEFERRED_FOR_WHOIS: - return false; - } - } else RR->mc->addCredential(tPtr,com,false); - } + unsigned int p = ZT_PACKET_IDX_PAYLOAD; + while ((p < size())&&((*this)[p] != 0)) { + p += com.deserialize(*this,p); + if (com) { + network = RR->node->network(com.networkId()); + if (network) { + switch (network->addCredential(tPtr,com)) { + case Membership::ADD_REJECTED: + break; + case Membership::ADD_ACCEPTED_NEW: + case Membership::ADD_ACCEPTED_REDUNDANT: + trustEstablished = true; + break; + case Membership::ADD_DEFERRED_FOR_WHOIS: + return false; + } + } else RR->mc->addCredential(tPtr,com,false); } - ++p; // skip trailing 0 after COMs if present - - if (p < size()) { // older ZeroTier versions do not send capabilities, tags, or revocations - const unsigned int numCapabilities = at(p); p += 2; - for(unsigned int i=0;iid() != cap.networkId())) - network = RR->node->network(cap.networkId()); - if (network) { - switch (network->addCredential(tPtr,cap)) { - case Membership::ADD_REJECTED: - break; - case Membership::ADD_ACCEPTED_NEW: - case Membership::ADD_ACCEPTED_REDUNDANT: - trustEstablished = true; - break; - case Membership::ADD_DEFERRED_FOR_WHOIS: - return false; - } - } - } - - if (p >= size()) return true; - - const unsigned int numTags = at(p); p += 2; - for(unsigned int i=0;iid() != tag.networkId())) - network = RR->node->network(tag.networkId()); - if (network) { - switch (network->addCredential(tPtr,tag)) { - case Membership::ADD_REJECTED: - break; - case Membership::ADD_ACCEPTED_NEW: - case Membership::ADD_ACCEPTED_REDUNDANT: - trustEstablished = true; - break; - case Membership::ADD_DEFERRED_FOR_WHOIS: - return false; - } - } - } - - if (p >= size()) return true; - - const unsigned int numRevocations = at(p); p += 2; - for(unsigned int i=0;iid() != revocation.networkId())) - network = RR->node->network(revocation.networkId()); - if (network) { - switch(network->addCredential(tPtr,peer->address(),revocation)) { - case Membership::ADD_REJECTED: - break; - case Membership::ADD_ACCEPTED_NEW: - case Membership::ADD_ACCEPTED_REDUNDANT: - trustEstablished = true; - break; - case Membership::ADD_DEFERRED_FOR_WHOIS: - return false; - } - } - } - - if (p >= size()) return true; - - const unsigned int numCoos = at(p); p += 2; - for(unsigned int i=0;iid() != coo.networkId())) - network = RR->node->network(coo.networkId()); - if (network) { - switch(network->addCredential(tPtr,coo)) { - case Membership::ADD_REJECTED: - break; - case Membership::ADD_ACCEPTED_NEW: - case Membership::ADD_ACCEPTED_REDUNDANT: - trustEstablished = true; - break; - case Membership::ADD_DEFERRED_FOR_WHOIS: - return false; - } - } - } - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_NETWORK_CREDENTIALS,0,Packet::VERB_NOP,trustEstablished,(network) ? network->id() : 0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_NETWORK_CREDENTIALS,"unexpected exception"); } + ++p; // skip trailing 0 after COMs if present + + if (p < size()) { // older ZeroTier versions do not send capabilities, tags, or revocations + const unsigned int numCapabilities = at(p); p += 2; + for(unsigned int i=0;iid() != cap.networkId())) + network = RR->node->network(cap.networkId()); + if (network) { + switch (network->addCredential(tPtr,cap)) { + case Membership::ADD_REJECTED: + break; + case Membership::ADD_ACCEPTED_NEW: + case Membership::ADD_ACCEPTED_REDUNDANT: + trustEstablished = true; + break; + case Membership::ADD_DEFERRED_FOR_WHOIS: + return false; + } + } + } + + if (p >= size()) return true; + + const unsigned int numTags = at(p); p += 2; + for(unsigned int i=0;iid() != tag.networkId())) + network = RR->node->network(tag.networkId()); + if (network) { + switch (network->addCredential(tPtr,tag)) { + case Membership::ADD_REJECTED: + break; + case Membership::ADD_ACCEPTED_NEW: + case Membership::ADD_ACCEPTED_REDUNDANT: + trustEstablished = true; + break; + case Membership::ADD_DEFERRED_FOR_WHOIS: + return false; + } + } + } + + if (p >= size()) return true; + + const unsigned int numRevocations = at(p); p += 2; + for(unsigned int i=0;iid() != revocation.networkId())) + network = RR->node->network(revocation.networkId()); + if (network) { + switch(network->addCredential(tPtr,peer->address(),revocation)) { + case Membership::ADD_REJECTED: + break; + case Membership::ADD_ACCEPTED_NEW: + case Membership::ADD_ACCEPTED_REDUNDANT: + trustEstablished = true; + break; + case Membership::ADD_DEFERRED_FOR_WHOIS: + return false; + } + } + } + + if (p >= size()) return true; + + const unsigned int numCoos = at(p); p += 2; + for(unsigned int i=0;iid() != coo.networkId())) + network = RR->node->network(coo.networkId()); + if (network) { + switch(network->addCredential(tPtr,coo)) { + case Membership::ADD_REJECTED: + break; + case Membership::ADD_ACCEPTED_NEW: + case Membership::ADD_ACCEPTED_REDUNDANT: + trustEstablished = true; + break; + case Membership::ADD_DEFERRED_FOR_WHOIS: + return false; + } + } + } + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_NETWORK_CREDENTIALS,0,Packet::VERB_NOP,trustEstablished,(network) ? network->id() : 0); + return true; } bool IncomingPacket::_doNETWORK_CONFIG_REQUEST(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t nwid = at(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_NETWORK_ID); - const unsigned int hopCount = hops(); - const uint64_t requestPacketId = packetId(); + const uint64_t nwid = at(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_NETWORK_ID); + const unsigned int hopCount = hops(); + const uint64_t requestPacketId = packetId(); - if (RR->localNetworkController) { - const unsigned int metaDataLength = (ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT_LEN <= size()) ? at(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT_LEN) : 0; - const char *metaDataBytes = (metaDataLength != 0) ? (const char *)field(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT,metaDataLength) : (const char *)0; - const Dictionary metaData(metaDataBytes,metaDataLength); - RR->localNetworkController->request(nwid,(hopCount > 0) ? InetAddress() : _path->address(),requestPacketId,peer->identity(),metaData); - } else { - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_ERROR); - outp.append((unsigned char)Packet::VERB_NETWORK_CONFIG_REQUEST); - outp.append(requestPacketId); - outp.append((unsigned char)Packet::ERROR_UNSUPPORTED_OPERATION); - outp.append(nwid); - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } - - peer->received(tPtr,_path,hopCount,requestPacketId,Packet::VERB_NETWORK_CONFIG_REQUEST,0,Packet::VERB_NOP,false,nwid); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_NETWORK_CONFIG_REQUEST,"unexpected exception"); + if (RR->localNetworkController) { + const unsigned int metaDataLength = (ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT_LEN <= size()) ? at(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT_LEN) : 0; + const char *metaDataBytes = (metaDataLength != 0) ? (const char *)field(ZT_PROTO_VERB_NETWORK_CONFIG_REQUEST_IDX_DICT,metaDataLength) : (const char *)0; + const Dictionary metaData(metaDataBytes,metaDataLength); + RR->localNetworkController->request(nwid,(hopCount > 0) ? InetAddress() : _path->address(),requestPacketId,peer->identity(),metaData); + } else { + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_ERROR); + outp.append((unsigned char)Packet::VERB_NETWORK_CONFIG_REQUEST); + outp.append(requestPacketId); + outp.append((unsigned char)Packet::ERROR_UNSUPPORTED_OPERATION); + outp.append(nwid); + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); } + + peer->received(tPtr,_path,hopCount,requestPacketId,Packet::VERB_NETWORK_CONFIG_REQUEST,0,Packet::VERB_NOP,false,nwid); + return true; } bool IncomingPacket::_doNETWORK_CONFIG(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const SharedPtr network(RR->node->network(at(ZT_PACKET_IDX_PAYLOAD))); - if (network) { - const uint64_t configUpdateId = network->handleConfigChunk(tPtr,packetId(),source(),*this,ZT_PACKET_IDX_PAYLOAD); - if (configUpdateId) { - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); - outp.append((uint8_t)Packet::VERB_ECHO); - outp.append((uint64_t)packetId()); - outp.append((uint64_t)network->id()); - outp.append((uint64_t)configUpdateId); - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } + const SharedPtr network(RR->node->network(at(ZT_PACKET_IDX_PAYLOAD))); + if (network) { + const uint64_t configUpdateId = network->handleConfigChunk(tPtr,packetId(),source(),*this,ZT_PACKET_IDX_PAYLOAD); + if (configUpdateId) { + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); + outp.append((uint8_t)Packet::VERB_ECHO); + outp.append((uint64_t)packetId()); + outp.append((uint64_t)network->id()); + outp.append((uint64_t)configUpdateId); + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_NETWORK_CONFIG,0,Packet::VERB_NOP,false,(network) ? network->id() : 0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_NETWORK_CONFIG,"unexpected exception"); } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_NETWORK_CONFIG,0,Packet::VERB_NOP,false,(network) ? network->id() : 0); + return true; } bool IncomingPacket::_doMULTICAST_GATHER(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t nwid = at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_NETWORK_ID); - const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_GATHER_IDX_FLAGS]; - const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_ADI)); - const unsigned int gatherLimit = at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_GATHER_LIMIT); + const uint64_t nwid = at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_NETWORK_ID); + const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_GATHER_IDX_FLAGS]; + const MulticastGroup mg(MAC(field(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_MAC,6),6),at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_ADI)); + const unsigned int gatherLimit = at(ZT_PROTO_VERB_MULTICAST_GATHER_IDX_GATHER_LIMIT); - const SharedPtr network(RR->node->network(nwid)); + const SharedPtr network(RR->node->network(nwid)); - if ((flags & 0x01) != 0) { - try { - CertificateOfMembership com; - com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_GATHER_IDX_COM); - if (com) { - if (network) - network->addCredential(tPtr,com); - else RR->mc->addCredential(tPtr,com,false); - } - } catch ( ... ) {} // discard invalid COMs - } - - const bool trustEstablished = ((network)&&(network->gate(tPtr,peer))); - if (!trustEstablished) - _sendErrorNeedCredentials(RR,tPtr,peer,nwid); - if ( ( trustEstablished || RR->mc->cacheAuthorized(peer->address(),nwid,RR->node->now()) ) && (gatherLimit > 0) ) { - Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); - outp.append((unsigned char)Packet::VERB_MULTICAST_GATHER); - outp.append(packetId()); - outp.append(nwid); - mg.mac().appendTo(outp); - outp.append((uint32_t)mg.adi()); - const unsigned int gatheredLocally = RR->mc->gather(peer->address(),nwid,mg,outp,gatherLimit); - if (gatheredLocally > 0) { - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + if ((flags & 0x01) != 0) { + try { + CertificateOfMembership com; + com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_GATHER_IDX_COM); + if (com) { + if (network) + network->addCredential(tPtr,com); + else RR->mc->addCredential(tPtr,com,false); } - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_GATHER,0,Packet::VERB_NOP,trustEstablished,nwid); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_GATHER,"unexpected exception"); + } catch ( ... ) {} // discard invalid COMs } + + const bool trustEstablished = ((network)&&(network->gate(tPtr,peer))); + if (!trustEstablished) + _sendErrorNeedCredentials(RR,tPtr,peer,nwid); + if ( ( trustEstablished || RR->mc->cacheAuthorized(peer->address(),nwid,RR->node->now()) ) && (gatherLimit > 0) ) { + Packet outp(peer->address(),RR->identity.address(),Packet::VERB_OK); + outp.append((unsigned char)Packet::VERB_MULTICAST_GATHER); + outp.append(packetId()); + outp.append(nwid); + mg.mac().appendTo(outp); + outp.append((uint32_t)mg.adi()); + const unsigned int gatheredLocally = RR->mc->gather(peer->address(),nwid,mg,outp,gatherLimit); + if (gatheredLocally > 0) { + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + } + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_GATHER,0,Packet::VERB_NOP,trustEstablished,nwid); + return true; } bool IncomingPacket::_doMULTICAST_FRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t nwid = at(ZT_PROTO_VERB_MULTICAST_FRAME_IDX_NETWORK_ID); - const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FLAGS]; + const uint64_t nwid = at(ZT_PROTO_VERB_MULTICAST_FRAME_IDX_NETWORK_ID); + const unsigned int flags = (*this)[ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FLAGS]; - const SharedPtr network(RR->node->network(nwid)); - if (network) { - // Offset -- size of optional fields added to position of later fields - unsigned int offset = 0; + const SharedPtr network(RR->node->network(nwid)); + if (network) { + // Offset -- size of optional fields added to position of later fields + unsigned int offset = 0; - if ((flags & 0x01) != 0) { - // This is deprecated but may still be sent by old peers - CertificateOfMembership com; - offset += com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME_IDX_COM); - if (com) - network->addCredential(tPtr,com); - } + if ((flags & 0x01) != 0) { + // This is deprecated but may still be sent by old peers + CertificateOfMembership com; + offset += com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME_IDX_COM); + if (com) + network->addCredential(tPtr,com); + } - if (!network->gate(tPtr,peer)) { - RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,true); - _sendErrorNeedCredentials(RR,tPtr,peer,nwid); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,false,nwid); - return true; - } - - unsigned int gatherLimit = 0; - if ((flags & 0x02) != 0) { - gatherLimit = at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_GATHER_LIMIT); - offset += 4; - } - - MAC from; - if ((flags & 0x04) != 0) { - from.setTo(field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_SOURCE_MAC,6),6); - offset += 6; - } else { - from.fromAddress(peer->address(),nwid); - } - - const MulticastGroup to(MAC(field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_DEST_MAC,6),6),at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_DEST_ADI)); - const unsigned int etherType = at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_ETHERTYPE); - const unsigned int frameLen = size() - (offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME); - - if (network->config().multicastLimit == 0) { - RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,from,to.mac(),"multicast disabled"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,false,nwid); - return true; - } - - if ((frameLen > 0)&&(frameLen <= ZT_MAX_MTU)) { - if (!to.mac().isMulticast()) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_FRAME,"destination not multicast"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - if ((!from)||(from.isMulticast())||(from == network->mac())) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_FRAME,"invalid source MAC"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - - if (from != MAC(peer->address(),nwid)) { - if (network->config().permitsBridging(peer->address())) { - network->learnBridgeRoute(from,peer->address()); - } else { - RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,from,to.mac(),"bridging not allowed (remote)"); - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay - return true; - } - } - - const uint8_t *const frameData = (const uint8_t *)field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME,frameLen); - if (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),from,to.mac(),frameData,frameLen,etherType,0) > 0) - RR->node->putFrame(tPtr,nwid,network->userPtr(),from,to.mac(),etherType,0,(const void *)frameData,frameLen); - } - - if (gatherLimit) { - Packet outp(source(),RR->identity.address(),Packet::VERB_OK); - outp.append((unsigned char)Packet::VERB_MULTICAST_FRAME); - outp.append(packetId()); - outp.append(nwid); - to.mac().appendTo(outp); - outp.append((uint32_t)to.adi()); - outp.append((unsigned char)0x02); // flag 0x02 = contains gather results - if (RR->mc->gather(peer->address(),nwid,to,outp,gatherLimit)) { - outp.armor(peer->key(),true,_path->nextOutgoingCounter()); - _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); - } - } - - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); - } else { + if (!network->gate(tPtr,peer)) { + RR->t->incomingNetworkAccessDenied(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,true); _sendErrorNeedCredentials(RR,tPtr,peer,nwid); peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,false,nwid); + return true; } - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_FRAME,"unexpected exception"); + + unsigned int gatherLimit = 0; + if ((flags & 0x02) != 0) { + gatherLimit = at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_GATHER_LIMIT); + offset += 4; + } + + MAC from; + if ((flags & 0x04) != 0) { + from.setTo(field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_SOURCE_MAC,6),6); + offset += 6; + } else { + from.fromAddress(peer->address(),nwid); + } + + const MulticastGroup to(MAC(field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_DEST_MAC,6),6),at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_DEST_ADI)); + const unsigned int etherType = at(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_ETHERTYPE); + const unsigned int frameLen = size() - (offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME); + + if (network->config().multicastLimit == 0) { + RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,from,to.mac(),"multicast disabled"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,false,nwid); + return true; + } + + if ((frameLen > 0)&&(frameLen <= ZT_MAX_MTU)) { + if (!to.mac().isMulticast()) { + RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_FRAME,"destination not multicast"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; + } + if ((!from)||(from.isMulticast())||(from == network->mac())) { + RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_MULTICAST_FRAME,"invalid source MAC"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; + } + + if (from != MAC(peer->address(),nwid)) { + if (network->config().permitsBridging(peer->address())) { + network->learnBridgeRoute(from,peer->address()); + } else { + RR->t->incomingNetworkFrameDropped(tPtr,network,_path,packetId(),size(),peer->address(),Packet::VERB_MULTICAST_FRAME,from,to.mac(),"bridging not allowed (remote)"); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); // trustEstablished because COM is okay + return true; + } + } + + const uint8_t *const frameData = (const uint8_t *)field(offset + ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME,frameLen); + if (network->filterIncomingPacket(tPtr,peer,RR->identity.address(),from,to.mac(),frameData,frameLen,etherType,0) > 0) + RR->node->putFrame(tPtr,nwid,network->userPtr(),from,to.mac(),etherType,0,(const void *)frameData,frameLen); + } + + if (gatherLimit) { + Packet outp(source(),RR->identity.address(),Packet::VERB_OK); + outp.append((unsigned char)Packet::VERB_MULTICAST_FRAME); + outp.append(packetId()); + outp.append(nwid); + to.mac().appendTo(outp); + outp.append((uint32_t)to.adi()); + outp.append((unsigned char)0x02); // flag 0x02 = contains gather results + if (RR->mc->gather(peer->address(),nwid,to,outp,gatherLimit)) { + outp.armor(peer->key(),true,_path->nextOutgoingCounter()); + _path->send(RR,tPtr,outp.data(),outp.size(),RR->node->now()); + } + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,true,nwid); + } else { + _sendErrorNeedCredentials(RR,tPtr,peer,nwid); + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_MULTICAST_FRAME,0,Packet::VERB_NOP,false,nwid); } + return true; } bool IncomingPacket::_doPUSH_DIRECT_PATHS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - const uint64_t now = RR->node->now(); - - // First, subject this to a rate limit - if (!peer->rateGatePushDirectPaths(now)) { - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_PUSH_DIRECT_PATHS,0,Packet::VERB_NOP,false,0); - return true; - } - - // Second, limit addresses by scope and type - uint8_t countPerScope[ZT_INETADDRESS_MAX_SCOPE+1][2]; // [][0] is v4, [][1] is v6 - memset(countPerScope,0,sizeof(countPerScope)); - - unsigned int count = at(ZT_PACKET_IDX_PAYLOAD); - unsigned int ptr = ZT_PACKET_IDX_PAYLOAD + 2; - - while (count--) { // if ptr overflows Buffer will throw - // TODO: some flags are not yet implemented - - unsigned int flags = (*this)[ptr++]; - unsigned int extLen = at(ptr); ptr += 2; - ptr += extLen; // unused right now - unsigned int addrType = (*this)[ptr++]; - unsigned int addrLen = (*this)[ptr++]; - - switch(addrType) { - case 4: { - const InetAddress a(field(ptr,4),4,at(ptr + 4)); - if ( - ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_FORGET_PATH) == 0) && // not being told to forget - (!( ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) == 0) && (peer->hasActivePathTo(now,a)) )) && // not already known - (RR->node->shouldUsePathForZeroTierTraffic(tPtr,peer->address(),_path->localSocket(),a)) ) // should use path - { - if ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) != 0) { - peer->redirect(tPtr,_path->localSocket(),a,now); - } else if (++countPerScope[(int)a.ipScope()][0] <= ZT_PUSH_DIRECT_PATHS_MAX_PER_SCOPE_AND_FAMILY) { - peer->attemptToContactAt(tPtr,InetAddress(),a,now,false,0); - } - } - } break; - case 6: { - const InetAddress a(field(ptr,16),16,at(ptr + 16)); - if ( - ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_FORGET_PATH) == 0) && // not being told to forget - (!( ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) == 0) && (peer->hasActivePathTo(now,a)) )) && // not already known - (RR->node->shouldUsePathForZeroTierTraffic(tPtr,peer->address(),_path->localSocket(),a)) ) // should use path - { - if ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) != 0) { - peer->redirect(tPtr,_path->localSocket(),a,now); - } else if (++countPerScope[(int)a.ipScope()][1] <= ZT_PUSH_DIRECT_PATHS_MAX_PER_SCOPE_AND_FAMILY) { - peer->attemptToContactAt(tPtr,InetAddress(),a,now,false,0); - } - } - } break; - } - ptr += addrLen; - } + const uint64_t now = RR->node->now(); + // First, subject this to a rate limit + if (!peer->rateGatePushDirectPaths(now)) { peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_PUSH_DIRECT_PATHS,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_PUSH_DIRECT_PATHS,"unexpected exception"); + return true; } + + // Second, limit addresses by scope and type + uint8_t countPerScope[ZT_INETADDRESS_MAX_SCOPE+1][2]; // [][0] is v4, [][1] is v6 + memset(countPerScope,0,sizeof(countPerScope)); + + unsigned int count = at(ZT_PACKET_IDX_PAYLOAD); + unsigned int ptr = ZT_PACKET_IDX_PAYLOAD + 2; + + while (count--) { // if ptr overflows Buffer will throw + // TODO: some flags are not yet implemented + + unsigned int flags = (*this)[ptr++]; + unsigned int extLen = at(ptr); ptr += 2; + ptr += extLen; // unused right now + unsigned int addrType = (*this)[ptr++]; + unsigned int addrLen = (*this)[ptr++]; + + switch(addrType) { + case 4: { + const InetAddress a(field(ptr,4),4,at(ptr + 4)); + if ( + ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_FORGET_PATH) == 0) && // not being told to forget + (!( ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) == 0) && (peer->hasActivePathTo(now,a)) )) && // not already known + (RR->node->shouldUsePathForZeroTierTraffic(tPtr,peer->address(),_path->localSocket(),a)) ) // should use path + { + if ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) != 0) { + peer->redirect(tPtr,_path->localSocket(),a,now); + } else if (++countPerScope[(int)a.ipScope()][0] <= ZT_PUSH_DIRECT_PATHS_MAX_PER_SCOPE_AND_FAMILY) { + peer->attemptToContactAt(tPtr,InetAddress(),a,now,false,0); + } + } + } break; + case 6: { + const InetAddress a(field(ptr,16),16,at(ptr + 16)); + if ( + ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_FORGET_PATH) == 0) && // not being told to forget + (!( ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) == 0) && (peer->hasActivePathTo(now,a)) )) && // not already known + (RR->node->shouldUsePathForZeroTierTraffic(tPtr,peer->address(),_path->localSocket(),a)) ) // should use path + { + if ((flags & ZT_PUSH_DIRECT_PATHS_FLAG_CLUSTER_REDIRECT) != 0) { + peer->redirect(tPtr,_path->localSocket(),a,now); + } else if (++countPerScope[(int)a.ipScope()][1] <= ZT_PUSH_DIRECT_PATHS_MAX_PER_SCOPE_AND_FAMILY) { + peer->attemptToContactAt(tPtr,InetAddress(),a,now,false,0); + } + } + } break; + } + ptr += addrLen; + } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_PUSH_DIRECT_PATHS,0,Packet::VERB_NOP,false,0); + return true; } bool IncomingPacket::_doUSER_MESSAGE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { - try { - if (likely(size() >= (ZT_PACKET_IDX_PAYLOAD + 8))) { - ZT_UserMessage um; - um.origin = peer->address().toInt(); - um.typeId = at(ZT_PACKET_IDX_PAYLOAD); - um.data = reinterpret_cast(reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD + 8); - um.length = size() - (ZT_PACKET_IDX_PAYLOAD + 8); - RR->node->postEvent(tPtr,ZT_EVENT_USER_MESSAGE,reinterpret_cast(&um)); - } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_USER_MESSAGE,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_USER_MESSAGE,"unexpected exception"); + if (likely(size() >= (ZT_PACKET_IDX_PAYLOAD + 8))) { + ZT_UserMessage um; + um.origin = peer->address().toInt(); + um.typeId = at(ZT_PACKET_IDX_PAYLOAD); + um.data = reinterpret_cast(reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD + 8); + um.length = size() - (ZT_PACKET_IDX_PAYLOAD + 8); + RR->node->postEvent(tPtr,ZT_EVENT_USER_MESSAGE,reinterpret_cast(&um)); } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_USER_MESSAGE,0,Packet::VERB_NOP,false,0); + return true; } bool IncomingPacket::_doREMOTE_TRACE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr &peer) { ZT_RemoteTrace rt; - try { - const char *ptr = reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD; - const char *const eof = reinterpret_cast(data()) + size(); - rt.origin = peer->address().toInt(); - rt.data = const_cast(ptr); // start of first string - while (ptr < eof) { - if (!*ptr) { // end of string - rt.len = (unsigned int)(ptr - rt.data); - if ((rt.len > 0)&&(rt.len <= ZT_MAX_REMOTE_TRACE_SIZE)) - RR->node->postEvent(tPtr,ZT_EVENT_REMOTE_TRACE,&rt); - rt.data = const_cast(++ptr); // start of next string, if any - } else { - ++ptr; - } + const char *ptr = reinterpret_cast(data()) + ZT_PACKET_IDX_PAYLOAD; + const char *const eof = reinterpret_cast(data()) + size(); + rt.origin = peer->address().toInt(); + rt.data = const_cast(ptr); // start of first string + while (ptr < eof) { + if (!*ptr) { // end of string + rt.len = (unsigned int)(ptr - rt.data); + if ((rt.len > 0)&&(rt.len <= ZT_MAX_REMOTE_TRACE_SIZE)) + RR->node->postEvent(tPtr,ZT_EVENT_REMOTE_TRACE,&rt); + rt.data = const_cast(++ptr); // start of next string, if any + } else { + ++ptr; } - peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_REMOTE_TRACE,0,Packet::VERB_NOP,false,0); - } catch ( ... ) { - RR->t->incomingPacketInvalid(tPtr,_path,packetId(),source(),hops(),Packet::VERB_REMOTE_TRACE,"unexpected exception"); } + + peer->received(tPtr,_path,hops(),packetId(),Packet::VERB_REMOTE_TRACE,0,Packet::VERB_NOP,false,0); + return true; }