mirror of
https://github.com/oxen-io/lokinet.git
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970 lines
26 KiB
C++
970 lines
26 KiB
C++
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#include <llarp/dht/messages/findintro.hpp>
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#include <llarp/messages/dht.hpp>
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#include <llarp/service/endpoint.hpp>
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#include <llarp/service/protocol.hpp>
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#include "buffer.hpp"
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#include "router.hpp"
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namespace llarp
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{
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namespace service
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{
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Endpoint::Endpoint(const std::string& name, llarp_router* r)
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: llarp_pathbuilder_context(r, r->dht, 2, 4), m_Router(r), m_Name(name)
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{
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m_Tag.Zero();
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}
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bool
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Endpoint::SetOption(const std::string& k, const std::string& v)
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{
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if(k == "keyfile")
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{
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m_Keyfile = v;
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}
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if(k == "tag")
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{
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m_Tag = v;
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llarp::LogInfo("Setting tag to ", v);
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}
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if(k == "prefetch-tag")
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{
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m_PrefetchTags.insert(v);
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}
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if(k == "prefetch-addr")
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{
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Address addr;
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if(addr.FromString(v))
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m_PrefetchAddrs.insert(addr);
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}
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if(k == "netns")
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{
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m_NetNS = v;
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m_OnInit.push_back(std::bind(&Endpoint::IsolateNetwork, this));
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}
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return true;
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}
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bool
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Endpoint::IsolateNetwork()
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{
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m_IsolatedWorker = llarp_init_isolated_net_threadpool(
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m_Name.c_str(), &SetupIsolatedNetwork, this);
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m_IsolatedLogic = llarp_init_single_process_logic(m_IsolatedWorker);
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return true;
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}
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struct PathAlignJob
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{
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Address remote;
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PathAlignJob(const Address& addr) : remote(addr)
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{
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}
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void
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HandleResult(Endpoint::OutboundContext* context)
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{
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if(context)
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{
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llarp::LogInfo("BEEP");
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byte_t tmp[128] = {0};
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memcpy(tmp, "BEEP", 4);
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auto buf = llarp::StackBuffer< decltype(tmp) >(tmp);
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context->AsyncEncryptAndSendTo(buf, eProtocolText);
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}
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else
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{
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llarp::LogWarn("PathAlignJob timed out");
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}
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delete this;
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}
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};
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bool
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Endpoint::SetupIsolatedNetwork(void* user)
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{
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return static_cast< Endpoint* >(user)->DoNetworkIsolation();
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}
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void
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Endpoint::Tick(llarp_time_t now)
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{
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/// reset tx id for publish
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if(now - m_LastPublishAttempt >= INTROSET_PUBLISH_RETRY_INTERVAL)
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m_CurrentPublishTX = 0;
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// publish descriptors
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if(ShouldPublishDescriptors(now))
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{
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std::set< Introduction > I;
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if(!GetCurrentIntroductions(I))
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{
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llarp::LogWarn("could not publish descriptors for endpoint ", Name(),
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" because we couldn't get any introductions");
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return;
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}
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m_IntroSet.I.clear();
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for(const auto& intro : I)
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m_IntroSet.I.push_back(intro);
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m_IntroSet.topic = m_Tag;
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if(!m_Identity.SignIntroSet(m_IntroSet, &m_Router->crypto))
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{
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llarp::LogWarn("failed to sign introset for endpoint ", Name());
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return;
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}
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if(PublishIntroSet(m_Router))
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{
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llarp::LogInfo("publishing introset for endpoint ", Name());
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}
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else
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{
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llarp::LogWarn("failed to publish intro set for endpoint ", Name());
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}
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}
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// expire pending tx
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{
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auto itr = m_PendingLookups.begin();
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while(itr != m_PendingLookups.end())
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{
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if(itr->second->IsTimedOut(now))
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{
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itr->second->HandleResponse({});
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itr = m_PendingLookups.erase(itr);
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}
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else
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++itr;
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}
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}
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for(const auto& addr : m_PrefetchAddrs)
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{
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if(!HasPathToService(addr))
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{
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PathAlignJob* j = new PathAlignJob(addr);
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if(!EnsurePathToService(j->remote,
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std::bind(&PathAlignJob::HandleResult, j,
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std::placeholders::_1),
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10000))
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{
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llarp::LogWarn("failed to ensure path to ", addr);
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delete j;
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}
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}
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}
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// prefetch tags
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for(const auto& tag : m_PrefetchTags)
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{
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auto itr = m_PrefetchedTags.find(tag);
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if(itr == m_PrefetchedTags.end())
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{
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itr = m_PrefetchedTags
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.insert(std::make_pair(
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tag, CachedTagResult(this, tag, GenTXID())))
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.first;
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}
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for(const auto& introset : itr->second.result)
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{
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PathAlignJob* j = new PathAlignJob(introset.A.Addr());
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if(!EnsurePathToService(j->remote,
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std::bind(&PathAlignJob::HandleResult, j,
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std::placeholders::_1),
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10000))
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{
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llarp::LogWarn("failed to ensure path to ", introset.A.Addr(),
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" for tag");
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delete j;
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}
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}
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itr->second.Expire(now);
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if(itr->second.ShouldRefresh(now))
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{
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auto path = PickRandomEstablishedPath();
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if(path)
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{
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itr->second.txid = GenTXID();
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itr->second.SendRequestViaPath(path, m_Router);
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}
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}
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}
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// tick remote sessions
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{
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auto itr = m_RemoteSessions.begin();
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while(itr != m_RemoteSessions.end())
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{
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if(itr->second->Tick(now))
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{
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delete itr->second;
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itr = m_RemoteSessions.erase(itr);
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}
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else
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++itr;
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}
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}
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}
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uint64_t
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Endpoint::GenTXID()
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{
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uint64_t txid = llarp_randint();
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while(m_PendingLookups.find(txid) != m_PendingLookups.end())
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++txid;
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return txid;
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}
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std::string
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Endpoint::Name() const
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{
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return m_Name + ":" + m_Identity.pub.Name();
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}
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bool
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Endpoint::HasPathToService(const Address& addr) const
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{
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return m_RemoteSessions.find(addr) != m_RemoteSessions.end();
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}
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void
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Endpoint::PutLookup(IServiceLookup* lookup, uint64_t txid)
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{
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m_PendingLookups.insert(std::make_pair(txid, lookup));
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}
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bool
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Endpoint::HandleGotIntroMessage(const llarp::dht::GotIntroMessage* msg)
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{
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auto crypto = &m_Router->crypto;
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std::set< IntroSet > remote;
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for(const auto& introset : msg->I)
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{
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if(!introset.VerifySignature(crypto))
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{
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llarp::LogInfo("invalid introset signature for ", introset,
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" on endpoint ", Name());
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if(m_Identity.pub == introset.A && m_CurrentPublishTX == msg->T)
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{
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IntroSetPublishFail();
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}
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return false;
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}
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if(m_Identity.pub == introset.A && m_CurrentPublishTX == msg->T)
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{
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llarp::LogInfo(
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"got introset publish confirmation for hidden service endpoint ",
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Name());
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IntroSetPublished();
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return true;
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}
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else
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{
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remote.insert(introset);
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}
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}
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auto itr = m_PendingLookups.find(msg->T);
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if(itr == m_PendingLookups.end())
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{
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llarp::LogWarn("invalid lookup response for hidden service endpoint ",
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Name(), " txid=", msg->T);
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return true;
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}
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bool result = itr->second->HandleResponse(remote);
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m_PendingLookups.erase(itr);
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return result;
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}
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void
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Endpoint::PutSenderFor(const ConvoTag& tag, const ServiceInfo& info)
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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{
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itr = m_Sessions.insert(std::make_pair(tag, Session{})).first;
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}
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itr->second.remote = info;
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itr->second.lastUsed = llarp_time_now_ms();
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}
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bool
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Endpoint::GetSenderFor(const ConvoTag& tag, ServiceInfo& si) const
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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return false;
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si = itr->second.remote;
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return true;
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}
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void
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Endpoint::PutIntroFor(const ConvoTag& tag, const Introduction& intro)
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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{
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itr = m_Sessions.insert(std::make_pair(tag, Session{})).first;
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}
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itr->second.intro = intro;
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itr->second.lastUsed = llarp_time_now_ms();
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}
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bool
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Endpoint::GetIntroFor(const ConvoTag& tag, Introduction& intro) const
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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return false;
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intro = itr->second.intro;
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return true;
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}
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bool
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Endpoint::GetConvoTagsForService(const ServiceInfo& info,
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std::set< ConvoTag >& tags) const
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{
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bool inserted = false;
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auto itr = m_Sessions.begin();
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while(itr != m_Sessions.end())
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{
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if(itr->second.remote == info)
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{
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inserted |= tags.insert(itr->first).second;
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}
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}
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return inserted;
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}
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bool
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Endpoint::GetCachedSessionKeyFor(const ConvoTag& tag,
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SharedSecret& secret) const
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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return false;
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secret = itr->second.sharedKey;
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return true;
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}
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void
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Endpoint::PutCachedSessionKeyFor(const ConvoTag& tag, const SharedSecret& k)
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{
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auto itr = m_Sessions.find(tag);
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if(itr == m_Sessions.end())
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{
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itr = m_Sessions.insert(std::make_pair(tag, Session{})).first;
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}
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itr->second.sharedKey = k;
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itr->second.lastUsed = llarp_time_now_ms();
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}
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bool
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Endpoint::Start()
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{
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auto crypto = &m_Router->crypto;
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if(m_Keyfile.size())
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{
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if(!m_Identity.EnsureKeys(m_Keyfile, crypto))
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return false;
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}
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else
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{
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m_Identity.RegenerateKeys(crypto);
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}
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if(!m_DataHandler)
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{
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m_DataHandler = this;
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}
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while(m_OnInit.size())
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{
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if(m_OnInit.front()())
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m_OnInit.pop_front();
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else
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return false;
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}
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return true;
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}
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Endpoint::~Endpoint()
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{
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}
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Endpoint::CachedTagResult::~CachedTagResult()
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{
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}
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bool
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Endpoint::CachedTagResult::HandleResponse(
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const std::set< IntroSet >& introsets)
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{
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auto now = llarp_time_now_ms();
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txid = 0;
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for(const auto& introset : introsets)
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if(result.insert(introset).second)
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lastModified = now;
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llarp::LogInfo("Tag result for ", tag.ToString(), " got ",
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introsets.size(), " results from lookup, have ",
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result.size(), " cached last modified at ", lastModified,
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" is ", now - lastModified, "ms old");
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return true;
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}
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void
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Endpoint::CachedTagResult::Expire(llarp_time_t now)
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{
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auto itr = result.begin();
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while(itr != result.end())
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{
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if(itr->HasExpiredIntros(now))
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{
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llarp::LogInfo("Removing expired tag Entry ", itr->A.Name());
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itr = result.erase(itr);
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lastModified = now;
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}
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else
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{
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++itr;
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}
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}
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}
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llarp::routing::IMessage*
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Endpoint::CachedTagResult::BuildRequestMessage()
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{
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llarp::routing::DHTMessage* msg = new llarp::routing::DHTMessage();
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msg->M.push_back(new llarp::dht::FindIntroMessage(tag, txid));
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lastRequest = llarp_time_now_ms();
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parent->PutLookup(this, txid);
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return msg;
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}
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bool
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Endpoint::PublishIntroSet(llarp_router* r)
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{
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auto path = GetEstablishedPathClosestTo(m_Identity.pub.Addr());
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if(path)
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{
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m_CurrentPublishTX = llarp_randint();
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llarp::routing::DHTMessage msg;
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msg.M.push_back(new llarp::dht::PublishIntroMessage(
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m_IntroSet, m_CurrentPublishTX, 4));
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if(path->SendRoutingMessage(&msg, r))
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{
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m_LastPublishAttempt = llarp_time_now_ms();
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llarp::LogInfo(Name(), " publishing introset");
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return true;
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}
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}
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llarp::LogWarn(Name(), " publish introset failed, no path");
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return false;
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}
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void
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Endpoint::IntroSetPublishFail()
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{
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llarp::LogWarn("failed to publish introset for ", Name());
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m_CurrentPublishTX = 0;
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}
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bool
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Endpoint::ShouldPublishDescriptors(llarp_time_t now) const
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{
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if(m_IntroSet.HasExpiredIntros(now))
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return m_CurrentPublishTX == 0
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&& now - m_LastPublishAttempt >= INTROSET_PUBLISH_RETRY_INTERVAL;
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return m_CurrentPublishTX == 0
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&& now - m_LastPublish >= INTROSET_PUBLISH_INTERVAL;
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}
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void
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Endpoint::IntroSetPublished()
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{
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m_CurrentPublishTX = 0;
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m_LastPublish = llarp_time_now_ms();
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llarp::LogInfo(Name(), " IntroSet publish confirmed");
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}
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struct HiddenServiceAddressLookup : public IServiceLookup
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{
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Address remote;
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Endpoint* endpoint;
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HiddenServiceAddressLookup(Endpoint* p, const Address& addr, uint64_t tx)
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: IServiceLookup(p, tx), remote(addr), endpoint(p)
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{
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llarp::LogInfo("New hidden service lookup for ", addr.ToString());
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}
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bool
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HandleResponse(const std::set< IntroSet >& results)
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{
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if(results.size() == 1)
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{
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llarp::LogInfo("hidden service lookup for ", remote.ToString(),
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" success");
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endpoint->PutNewOutboundContext(*results.begin());
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}
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else
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{
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llarp::LogInfo("no response in hidden service lookup for ",
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remote.ToString());
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}
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delete this;
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return true;
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}
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llarp::routing::IMessage*
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BuildRequestMessage()
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{
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llarp::routing::DHTMessage* msg = new llarp::routing::DHTMessage();
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msg->M.push_back(new llarp::dht::FindIntroMessage(remote, txid));
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return msg;
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}
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};
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bool
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Endpoint::DoNetworkIsolation()
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{
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/// TODO: implement me
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return false;
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}
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void
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Endpoint::PutNewOutboundContext(const llarp::service::IntroSet& introset)
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{
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Address addr;
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introset.A.CalculateAddress(addr);
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// only add new session if it's not there
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if(m_RemoteSessions.find(addr) == m_RemoteSessions.end())
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{
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OutboundContext* ctx = new OutboundContext(introset, this);
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m_RemoteSessions.insert(std::make_pair(addr, ctx));
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llarp::LogInfo("Created New outbound context for ", addr.ToString());
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}
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// inform pending
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auto itr = m_PendingServiceLookups.find(addr);
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if(itr != m_PendingServiceLookups.end())
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{
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itr->second(m_RemoteSessions.at(addr));
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m_PendingServiceLookups.erase(itr);
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}
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}
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void
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Endpoint::HandlePathBuilt(path::Path* p)
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{
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p->SetDataHandler(std::bind(&Endpoint::HandleHiddenServiceFrame, this,
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std::placeholders::_1));
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}
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bool
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Endpoint::HandleHiddenServiceFrame(const ProtocolFrame* frame)
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{
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return frame->AsyncDecryptAndVerify(EndpointLogic(), Crypto(), Worker(),
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m_Identity.enckey, m_DataHandler);
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}
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void
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Endpoint::OutboundContext::HandlePathBuilt(path::Path* p)
|
|
{
|
|
p->SetDataHandler(
|
|
std::bind(&Endpoint::OutboundContext::HandleHiddenServiceFrame, this,
|
|
std::placeholders::_1));
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::PutLookup(IServiceLookup* lookup, uint64_t txid)
|
|
{
|
|
m_Parent->PutLookup(lookup, txid);
|
|
}
|
|
|
|
bool
|
|
Endpoint::OutboundContext::HandleHiddenServiceFrame(
|
|
const ProtocolFrame* frame)
|
|
{
|
|
return m_Parent->HandleHiddenServiceFrame(frame);
|
|
}
|
|
|
|
bool
|
|
Endpoint::EnsurePathToService(const Address& remote, PathEnsureHook hook,
|
|
llarp_time_t timeoutMS)
|
|
{
|
|
auto path = GetEstablishedPathClosestTo(remote);
|
|
if(!path)
|
|
{
|
|
llarp::LogWarn("No outbound path for lookup yet");
|
|
return false;
|
|
}
|
|
llarp::LogInfo(Name(), " Ensure Path to ", remote.ToString());
|
|
{
|
|
auto itr = m_RemoteSessions.find(remote);
|
|
if(itr != m_RemoteSessions.end())
|
|
{
|
|
hook(itr->second);
|
|
return true;
|
|
}
|
|
}
|
|
auto itr = m_PendingServiceLookups.find(remote);
|
|
if(itr != m_PendingServiceLookups.end())
|
|
{
|
|
// duplicate
|
|
llarp::LogWarn("duplicate pending service lookup to ",
|
|
remote.ToString());
|
|
return false;
|
|
}
|
|
|
|
m_PendingServiceLookups.insert(std::make_pair(remote, hook));
|
|
|
|
HiddenServiceAddressLookup* job =
|
|
new HiddenServiceAddressLookup(this, remote, GenTXID());
|
|
|
|
return job->SendRequestViaPath(path, Router());
|
|
}
|
|
|
|
Endpoint::OutboundContext::OutboundContext(const IntroSet& intro,
|
|
Endpoint* parent)
|
|
: llarp_pathbuilder_context(parent->m_Router, parent->m_Router->dht, 2,
|
|
4)
|
|
, currentIntroSet(intro)
|
|
, m_Parent(parent)
|
|
|
|
{
|
|
selectedIntro.Clear();
|
|
ShiftIntroduction();
|
|
}
|
|
|
|
Endpoint::OutboundContext::~OutboundContext()
|
|
{
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::ShiftIntroduction()
|
|
{
|
|
for(const auto& intro : currentIntroSet.I)
|
|
{
|
|
if(intro.expiresAt > selectedIntro.expiresAt)
|
|
{
|
|
selectedIntro = intro;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
Endpoint::OutboundContext::HandleGotIntroMessage(
|
|
const llarp::dht::GotIntroMessage* msg)
|
|
{
|
|
if(msg->T != m_UpdateIntrosetTX)
|
|
{
|
|
llarp::LogError("unwarrented introset message txid=", msg->T);
|
|
return false;
|
|
}
|
|
auto crypto = m_Parent->Crypto();
|
|
if(msg->I.size() == 1)
|
|
{
|
|
// found intro set
|
|
const auto& introset = msg->I[0];
|
|
if(introset.VerifySignature(crypto) && currentIntroSet.A == introset.A)
|
|
{
|
|
// update
|
|
currentIntroSet = introset;
|
|
// reset tx
|
|
m_UpdateIntrosetTX = 0;
|
|
// shift to newest intro
|
|
// TODO: check timestamp on introset to make sure it's new enough
|
|
ShiftIntroduction();
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
llarp::LogError("Signature Error for intro set ", introset);
|
|
return false;
|
|
}
|
|
}
|
|
llarp::LogError("Bad number of intro sets in response");
|
|
return false;
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::AsyncEncryptAndSendTo(llarp_buffer_t data,
|
|
ProtocolType protocol)
|
|
{
|
|
if(sequenceNo)
|
|
{
|
|
EncryptAndSendTo(data);
|
|
}
|
|
else
|
|
{
|
|
AsyncGenIntro(data);
|
|
}
|
|
}
|
|
|
|
struct AsyncIntroGen
|
|
{
|
|
llarp_logic* logic;
|
|
llarp_crypto* crypto;
|
|
byte_t* sharedKey;
|
|
ServiceInfo remote;
|
|
Identity* m_LocalIdentity;
|
|
ProtocolMessage msg;
|
|
ProtocolFrame frame;
|
|
Introduction intro;
|
|
std::function< void(ProtocolFrame&) > hook;
|
|
IDataHandler* handler;
|
|
|
|
AsyncIntroGen(llarp_logic* l, llarp_crypto* c, byte_t* key,
|
|
const ServiceInfo& r, Identity* localident,
|
|
const Introduction& us, IDataHandler* h)
|
|
: logic(l)
|
|
, crypto(c)
|
|
, sharedKey(key)
|
|
, remote(r)
|
|
, m_LocalIdentity(localident)
|
|
, intro(us)
|
|
, handler(h)
|
|
{
|
|
}
|
|
|
|
static void
|
|
Result(void* user)
|
|
{
|
|
AsyncIntroGen* self = static_cast< AsyncIntroGen* >(user);
|
|
// put values
|
|
self->handler->PutCachedSessionKeyFor(self->msg.tag, self->sharedKey);
|
|
self->handler->PutIntroFor(self->msg.tag, self->msg.introReply);
|
|
self->handler->PutSenderFor(self->msg.tag, self->remote);
|
|
self->hook(self->frame);
|
|
delete self;
|
|
}
|
|
|
|
static void
|
|
Work(void* user)
|
|
{
|
|
AsyncIntroGen* self = static_cast< AsyncIntroGen* >(user);
|
|
// randomize Nounce
|
|
self->frame.N.Randomize();
|
|
// randomize tag
|
|
self->msg.tag.Randomize();
|
|
// set sender
|
|
self->msg.sender = self->m_LocalIdentity->pub;
|
|
// set our introduction
|
|
self->msg.introReply = self->intro;
|
|
// derive session key
|
|
self->crypto->dh_server(self->sharedKey, self->remote.enckey,
|
|
self->m_LocalIdentity->enckey, self->frame.N);
|
|
|
|
// encrypt and sign
|
|
self->frame.EncryptAndSign(self->crypto, &self->msg, self->sharedKey,
|
|
self->m_LocalIdentity->signkey);
|
|
// inform result
|
|
llarp_logic_queue_job(self->logic, {self, &Result});
|
|
}
|
|
};
|
|
|
|
void
|
|
Endpoint::OutboundContext::AsyncGenIntro(llarp_buffer_t payload)
|
|
{
|
|
AsyncIntroGen* ex = new AsyncIntroGen(
|
|
m_Parent->RouterLogic(), m_Parent->Crypto(), sharedKey,
|
|
currentIntroSet.A, m_Parent->GetIdentity(), selectedIntro,
|
|
m_Parent->m_DataHandler);
|
|
ex->hook = std::bind(&Endpoint::OutboundContext::Send, this,
|
|
std::placeholders::_1);
|
|
|
|
ex->msg.PutBuffer(payload);
|
|
llarp_threadpool_queue_job(m_Parent->Worker(),
|
|
{ex, &AsyncIntroGen::Work});
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::Send(ProtocolFrame& msg)
|
|
{
|
|
// in this context we assume the message contents are encrypted
|
|
auto now = llarp_time_now_ms();
|
|
if(currentIntroSet.HasExpiredIntros(now))
|
|
{
|
|
UpdateIntroSet();
|
|
}
|
|
if(selectedIntro.expiresAt <= now || now - selectedIntro.expiresAt > 1000)
|
|
{
|
|
ShiftIntroduction();
|
|
}
|
|
auto path = GetPathByRouter(selectedIntro.router);
|
|
if(path)
|
|
{
|
|
routing::PathTransferMessage transfer;
|
|
transfer.T = &msg;
|
|
transfer.Y.Randomize();
|
|
transfer.P = selectedIntro.pathID;
|
|
llarp::LogInfo("sending frame via ", path->Upstream(), " to ",
|
|
path->Endpoint(), " for ", Name());
|
|
path->SendRoutingMessage(&transfer, m_Parent->Router());
|
|
}
|
|
else
|
|
{
|
|
llarp::LogWarn("No path to ", selectedIntro.router);
|
|
}
|
|
}
|
|
|
|
std::string
|
|
Endpoint::OutboundContext::Name() const
|
|
{
|
|
return "OBContext:" + m_Parent->Name() + "-"
|
|
+ currentIntroSet.A.Addr().ToString();
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::UpdateIntroSet()
|
|
{
|
|
auto path = GetEstablishedPathClosestTo(currentIntroSet.A.Addr());
|
|
if(path)
|
|
{
|
|
if(m_UpdateIntrosetTX == 0)
|
|
{
|
|
m_UpdateIntrosetTX = llarp_randint();
|
|
routing::DHTMessage msg;
|
|
msg.M.push_back(new llarp::dht::FindIntroMessage(
|
|
currentIntroSet.A.Addr(), m_UpdateIntrosetTX));
|
|
path->SendRoutingMessage(&msg, m_Parent->Router());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
llarp::LogWarn(
|
|
"Cannot update introset no path for outbound session to ",
|
|
currentIntroSet.A.Addr().ToString());
|
|
}
|
|
}
|
|
|
|
bool
|
|
Endpoint::OutboundContext::Tick(llarp_time_t now)
|
|
{
|
|
if(selectedIntro.expiresAt >= now
|
|
|| selectedIntro.expiresAt - now < 30000)
|
|
{
|
|
UpdateIntroSet();
|
|
}
|
|
// TODO: check for expiration
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Endpoint::OutboundContext::SelectHop(llarp_nodedb* db, llarp_rc* prev,
|
|
llarp_rc* cur, size_t hop)
|
|
{
|
|
// TODO: don't hard code
|
|
llarp::LogInfo("Select hop ", hop);
|
|
if(hop == 3)
|
|
{
|
|
auto localcopy = llarp_nodedb_get_rc(db, selectedIntro.router);
|
|
if(localcopy)
|
|
{
|
|
llarp_rc_copy(cur, localcopy);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
// we don't have it?
|
|
llarp::LogError(
|
|
"cannot build aligned path, don't have router for "
|
|
"introduction ",
|
|
selectedIntro);
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
return llarp_pathbuilder_context::SelectHop(db, prev, cur, hop);
|
|
}
|
|
|
|
uint64_t
|
|
Endpoint::GetSeqNoForConvo(const ConvoTag& tag)
|
|
{
|
|
auto itr = m_Sessions.find(tag);
|
|
if(itr == m_Sessions.end())
|
|
return 0;
|
|
return ++(itr->second.seqno);
|
|
}
|
|
|
|
void
|
|
Endpoint::OutboundContext::EncryptAndSendTo(llarp_buffer_t payload)
|
|
{
|
|
auto path = GetPathByRouter(selectedIntro.router);
|
|
if(path)
|
|
{
|
|
std::set< ConvoTag > tags;
|
|
if(!m_Parent->m_DataHandler->GetConvoTagsForService(currentIntroSet.A,
|
|
tags))
|
|
{
|
|
llarp::LogError("no open converstations with remote endpoint?");
|
|
return;
|
|
}
|
|
auto crypto = m_Parent->Crypto();
|
|
SharedSecret shared;
|
|
|
|
ProtocolFrame f;
|
|
f.N.Randomize();
|
|
f.T = *tags.begin();
|
|
f.S = m_Parent->GetSeqNoForConvo(f.T);
|
|
|
|
if(m_Parent->m_DataHandler->GetCachedSessionKeyFor(f.T, shared))
|
|
{
|
|
ProtocolMessage msg;
|
|
msg.introReply = selectedIntro;
|
|
msg.sender = m_Parent->m_Identity.pub;
|
|
msg.PutBuffer(payload);
|
|
|
|
if(!f.EncryptAndSign(crypto, &msg, shared, currentIntroSet.A.signkey))
|
|
{
|
|
llarp::LogError("failed to sign");
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
llarp::LogError("No cached session key");
|
|
return;
|
|
}
|
|
|
|
routing::PathTransferMessage msg;
|
|
msg.P = selectedIntro.pathID;
|
|
msg.Y.Randomize();
|
|
msg.T = &f;
|
|
if(!path->SendRoutingMessage(&msg, m_Parent->Router()))
|
|
{
|
|
llarp::LogWarn("Failed to send routing message for data");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
llarp::LogError("no outbound path for sending message");
|
|
}
|
|
}
|
|
|
|
llarp_logic*
|
|
Endpoint::RouterLogic()
|
|
{
|
|
return m_Router->logic;
|
|
}
|
|
|
|
llarp_logic*
|
|
Endpoint::EndpointLogic()
|
|
{
|
|
return m_IsolatedLogic ? m_IsolatedLogic : m_Router->logic;
|
|
}
|
|
|
|
llarp_crypto*
|
|
Endpoint::Crypto()
|
|
{
|
|
return &m_Router->crypto;
|
|
}
|
|
|
|
llarp_threadpool*
|
|
Endpoint::Worker()
|
|
{
|
|
return m_Router->tp;
|
|
}
|
|
|
|
} // namespace service
|
|
} // namespace llarp
|