mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-17 15:25:35 +00:00
f168b7cf72
It didn't do equality, it did "does the remaining space start with the argument" (and so the replacement in the previous commit was broken). This renames it to avoid the confusion and restores to what it was doing on dev.
389 lines
10 KiB
C++
389 lines
10 KiB
C++
#include "session.hpp"
|
|
|
|
#include <llarp/crypto/crypto.hpp>
|
|
#include <llarp/nodedb.hpp>
|
|
#include <llarp/path/path_context.hpp>
|
|
#include <llarp/path/path.hpp>
|
|
#include <llarp/quic/tunnel.hpp>
|
|
#include <llarp/router/abstractrouter.hpp>
|
|
#include <llarp/util/meta/memfn.hpp>
|
|
#include <utility>
|
|
|
|
namespace llarp
|
|
{
|
|
namespace exit
|
|
{
|
|
BaseSession::BaseSession(
|
|
const llarp::RouterID& routerId,
|
|
std::function<bool(const llarp_buffer_t&)> writepkt,
|
|
AbstractRouter* r,
|
|
size_t numpaths,
|
|
size_t hoplen,
|
|
EndpointBase* parent)
|
|
: llarp::path::Builder{r, numpaths, hoplen}
|
|
, m_ExitRouter{routerId}
|
|
, m_WritePacket{std::move(writepkt)}
|
|
, m_Counter{0}
|
|
, m_LastUse{r->Now()}
|
|
, m_BundleRC{false}
|
|
, m_Parent{parent}
|
|
{
|
|
CryptoManager::instance()->identity_keygen(m_ExitIdentity);
|
|
}
|
|
|
|
BaseSession::~BaseSession() = default;
|
|
|
|
void
|
|
BaseSession::HandlePathDied(path::Path_ptr p)
|
|
{
|
|
p->Rebuild();
|
|
}
|
|
|
|
util::StatusObject
|
|
BaseSession::ExtractStatus() const
|
|
{
|
|
auto obj = path::Builder::ExtractStatus();
|
|
obj["lastExitUse"] = to_json(m_LastUse);
|
|
auto pub = m_ExitIdentity.toPublic();
|
|
obj["exitIdentity"] = pub.ToString();
|
|
obj["endpoint"] = m_ExitRouter.ToString();
|
|
return obj;
|
|
}
|
|
|
|
bool
|
|
BaseSession::LoadIdentityFromFile(const char* fname)
|
|
{
|
|
return m_ExitIdentity.LoadFromFile(fname);
|
|
}
|
|
|
|
bool
|
|
BaseSession::ShouldBuildMore(llarp_time_t now) const
|
|
{
|
|
if (BuildCooldownHit(now))
|
|
return false;
|
|
const size_t expect = (1 + (numDesiredPaths / 2));
|
|
// check 30 seconds into the future and see if we need more paths
|
|
const llarp_time_t future = now + 30s + buildIntervalLimit;
|
|
return NumPathsExistingAt(future) < expect;
|
|
}
|
|
|
|
void
|
|
BaseSession::BlacklistSNode(const RouterID snode)
|
|
{
|
|
m_SnodeBlacklist.insert(std::move(snode));
|
|
}
|
|
|
|
std::optional<std::vector<RouterContact>>
|
|
BaseSession::GetHopsForBuild()
|
|
{
|
|
if (numHops == 1)
|
|
{
|
|
if (auto maybe = m_router->nodedb()->Get(m_ExitRouter))
|
|
return std::vector<RouterContact>{*maybe};
|
|
return std::nullopt;
|
|
}
|
|
else
|
|
return GetHopsAlignedToForBuild(m_ExitRouter);
|
|
}
|
|
|
|
bool
|
|
BaseSession::CheckPathDead(path::Path_ptr, llarp_time_t dlt)
|
|
{
|
|
return dlt >= path::alive_timeout;
|
|
}
|
|
|
|
void
|
|
BaseSession::HandlePathBuilt(llarp::path::Path_ptr p)
|
|
{
|
|
path::Builder::HandlePathBuilt(p);
|
|
p->SetDropHandler(util::memFn(&BaseSession::HandleTrafficDrop, this));
|
|
p->SetDeadChecker(util::memFn(&BaseSession::CheckPathDead, this));
|
|
p->SetExitTrafficHandler(util::memFn(&BaseSession::HandleTraffic, this));
|
|
p->AddObtainExitHandler(util::memFn(&BaseSession::HandleGotExit, this));
|
|
|
|
routing::ObtainExitMessage obtain;
|
|
obtain.S = p->NextSeqNo();
|
|
obtain.T = llarp::randint();
|
|
PopulateRequest(obtain);
|
|
if (!obtain.Sign(m_ExitIdentity))
|
|
{
|
|
llarp::LogError("Failed to sign exit request");
|
|
return;
|
|
}
|
|
if (p->SendExitRequest(obtain, m_router))
|
|
llarp::LogInfo("asking ", m_ExitRouter, " for exit");
|
|
else
|
|
llarp::LogError("failed to send exit request");
|
|
}
|
|
|
|
void
|
|
BaseSession::AddReadyHook(SessionReadyFunc func)
|
|
{
|
|
m_PendingCallbacks.emplace_back(func);
|
|
}
|
|
|
|
bool
|
|
BaseSession::HandleGotExit(llarp::path::Path_ptr p, llarp_time_t b)
|
|
{
|
|
if (b == 0s)
|
|
{
|
|
llarp::LogInfo("obtained an exit via ", p->Endpoint());
|
|
m_CurrentPath = p->RXID();
|
|
CallPendingCallbacks(true);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
BaseSession::CallPendingCallbacks(bool success)
|
|
{
|
|
if (m_PendingCallbacks.empty())
|
|
return;
|
|
|
|
if (success)
|
|
{
|
|
auto self = shared_from_this();
|
|
for (auto& f : m_PendingCallbacks)
|
|
f(self);
|
|
}
|
|
else
|
|
{
|
|
for (auto& f : m_PendingCallbacks)
|
|
f(nullptr);
|
|
}
|
|
m_PendingCallbacks.clear();
|
|
}
|
|
|
|
void
|
|
BaseSession::ResetInternalState()
|
|
{
|
|
auto sendExitClose = [&](const llarp::path::Path_ptr p) {
|
|
const static auto roles = llarp::path::ePathRoleExit | llarp::path::ePathRoleSVC;
|
|
if (p->SupportsAnyRoles(roles))
|
|
{
|
|
llarp::LogInfo(p->Name(), " closing exit path");
|
|
routing::CloseExitMessage msg;
|
|
if (msg.Sign(m_ExitIdentity) && p->SendExitClose(msg, m_router))
|
|
{
|
|
p->ClearRoles(roles);
|
|
}
|
|
else
|
|
llarp::LogWarn(p->Name(), " failed to send exit close message");
|
|
}
|
|
};
|
|
ForEachPath(sendExitClose);
|
|
path::Builder::ResetInternalState();
|
|
}
|
|
|
|
bool
|
|
BaseSession::Stop()
|
|
{
|
|
CallPendingCallbacks(false);
|
|
auto sendExitClose = [&](const path::Path_ptr p) {
|
|
if (p->SupportsAnyRoles(path::ePathRoleExit))
|
|
{
|
|
LogInfo(p->Name(), " closing exit path");
|
|
routing::CloseExitMessage msg;
|
|
if (!(msg.Sign(m_ExitIdentity) && p->SendExitClose(msg, m_router)))
|
|
LogWarn(p->Name(), " failed to send exit close message");
|
|
}
|
|
};
|
|
ForEachPath(sendExitClose);
|
|
m_router->pathContext().RemovePathSet(shared_from_this());
|
|
return path::Builder::Stop();
|
|
}
|
|
|
|
bool
|
|
BaseSession::HandleTraffic(
|
|
llarp::path::Path_ptr path,
|
|
const llarp_buffer_t& buf,
|
|
uint64_t counter,
|
|
service::ProtocolType t)
|
|
{
|
|
const service::ConvoTag tag{path->RXID().as_array()};
|
|
|
|
if (t == service::ProtocolType::QUIC)
|
|
{
|
|
auto quic = m_Parent->GetQUICTunnel();
|
|
if (not quic)
|
|
return false;
|
|
quic->receive_packet(tag, buf);
|
|
return true;
|
|
}
|
|
|
|
if (m_WritePacket)
|
|
{
|
|
llarp::net::IPPacket pkt{buf.view_all()};
|
|
if (pkt.empty())
|
|
return false;
|
|
m_LastUse = m_router->Now();
|
|
m_Downstream.emplace(counter, pkt);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
BaseSession::HandleTrafficDrop(llarp::path::Path_ptr p, const PathID_t& path, uint64_t s)
|
|
{
|
|
llarp::LogError("dropped traffic on exit ", m_ExitRouter, " S=", s, " P=", path);
|
|
p->EnterState(path::ePathIgnore, m_router->Now());
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
BaseSession::QueueUpstreamTraffic(
|
|
llarp::net::IPPacket pkt, const size_t N, service::ProtocolType t)
|
|
{
|
|
auto& queue = m_Upstream[pkt.size() / N];
|
|
// queue overflow
|
|
if (queue.size() >= MaxUpstreamQueueLength)
|
|
return false;
|
|
if (queue.size() == 0)
|
|
{
|
|
queue.emplace_back();
|
|
queue.back().protocol = t;
|
|
return queue.back().PutBuffer(llarp_buffer_t{pkt}, m_Counter++);
|
|
}
|
|
auto& back = queue.back();
|
|
// pack to nearest N
|
|
if (back.Size() + pkt.size() > N)
|
|
{
|
|
queue.emplace_back();
|
|
queue.back().protocol = t;
|
|
return queue.back().PutBuffer(llarp_buffer_t{pkt}, m_Counter++);
|
|
}
|
|
back.protocol = t;
|
|
return back.PutBuffer(llarp_buffer_t{pkt}, m_Counter++);
|
|
}
|
|
|
|
bool
|
|
BaseSession::IsReady() const
|
|
{
|
|
if (m_CurrentPath.IsZero())
|
|
return false;
|
|
const size_t expect = (1 + (numDesiredPaths / 2));
|
|
return AvailablePaths(llarp::path::ePathRoleExit) >= expect;
|
|
}
|
|
|
|
bool
|
|
BaseSession::IsExpired(llarp_time_t now) const
|
|
{
|
|
return now > m_LastUse && now - m_LastUse > LifeSpan;
|
|
}
|
|
|
|
bool
|
|
BaseSession::UrgentBuild(llarp_time_t now) const
|
|
{
|
|
if (BuildCooldownHit(now))
|
|
return false;
|
|
if (IsReady() and NumInStatus(path::ePathBuilding) < numDesiredPaths)
|
|
return path::Builder::UrgentBuild(now);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
BaseSession::FlushUpstream()
|
|
{
|
|
auto now = m_router->Now();
|
|
auto path = PickEstablishedPath(llarp::path::ePathRoleExit);
|
|
if (path)
|
|
{
|
|
for (auto& [i, queue] : m_Upstream)
|
|
{
|
|
while (queue.size())
|
|
{
|
|
auto& msg = queue.front();
|
|
msg.S = path->NextSeqNo();
|
|
path->SendRoutingMessage(msg, m_router);
|
|
queue.pop_front();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (m_Upstream.size())
|
|
llarp::LogWarn("no path for exit session");
|
|
// discard upstream
|
|
for (auto& [i, queue] : m_Upstream)
|
|
queue.clear();
|
|
m_Upstream.clear();
|
|
if (numHops == 1)
|
|
{
|
|
auto r = m_router;
|
|
if (const auto maybe = r->nodedb()->Get(m_ExitRouter); maybe.has_value())
|
|
r->TryConnectAsync(*maybe, 5);
|
|
else
|
|
r->LookupRouter(m_ExitRouter, [r](const std::vector<RouterContact>& results) {
|
|
if (results.size())
|
|
r->TryConnectAsync(results[0], 5);
|
|
});
|
|
}
|
|
else if (UrgentBuild(now))
|
|
BuildOneAlignedTo(m_ExitRouter);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
BaseSession::FlushDownstream()
|
|
{
|
|
while (m_Downstream.size())
|
|
{
|
|
if (m_WritePacket)
|
|
m_WritePacket(const_cast<net::IPPacket&>(m_Downstream.top().second).steal());
|
|
m_Downstream.pop();
|
|
}
|
|
}
|
|
|
|
SNodeSession::SNodeSession(
|
|
const llarp::RouterID& snodeRouter,
|
|
std::function<bool(const llarp_buffer_t&)> writepkt,
|
|
AbstractRouter* r,
|
|
size_t numpaths,
|
|
size_t hoplen,
|
|
bool useRouterSNodeKey,
|
|
EndpointBase* parent)
|
|
: BaseSession{snodeRouter, writepkt, r, numpaths, hoplen, parent}
|
|
{
|
|
if (useRouterSNodeKey)
|
|
{
|
|
m_ExitIdentity = r->identity();
|
|
}
|
|
}
|
|
|
|
std::string
|
|
SNodeSession::Name() const
|
|
{
|
|
return "SNode::" + m_ExitRouter.ToString();
|
|
}
|
|
|
|
std::string
|
|
ExitSession::Name() const
|
|
{
|
|
return "Exit::" + m_ExitRouter.ToString();
|
|
}
|
|
|
|
void
|
|
SNodeSession::SendPacketToRemote(const llarp_buffer_t& buf, service::ProtocolType t)
|
|
{
|
|
net::IPPacket pkt{buf.view_all()};
|
|
if (pkt.empty())
|
|
return;
|
|
pkt.ZeroAddresses();
|
|
QueueUpstreamTraffic(std::move(pkt), llarp::routing::ExitPadSize, t);
|
|
}
|
|
|
|
void
|
|
ExitSession::SendPacketToRemote(const llarp_buffer_t& buf, service::ProtocolType t)
|
|
{
|
|
net::IPPacket pkt{buf.view_all()};
|
|
if (pkt.empty())
|
|
return;
|
|
|
|
pkt.ZeroSourceAddress();
|
|
QueueUpstreamTraffic(std::move(pkt), llarp::routing::ExitPadSize, t);
|
|
}
|
|
} // namespace exit
|
|
} // namespace llarp
|