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pull/603/head
MXPLRS | Kirill 8 years ago committed by GitHub
parent 8e835f2f6b
commit c27f8a5c1e
1 changed files with 158 additions and 159 deletions
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317
Tunnel.cpp
Unescape Escape View File

@ -13,19 +13,19 @@
#include "Tunnel.h"
namespace i2p
{
{
namespace tunnel
{
{
Tunnel::Tunnel (std::shared_ptr<const TunnelConfig> config):
TunnelBase (config->GetTunnelID (), config->GetNextTunnelID (), config->GetNextIdentHash ()),
m_Config (config), m_Pool (nullptr), m_State (eTunnelStatePending), m_IsRecreated (false)
{
}
}
Tunnel::~Tunnel ()
{
}
}
void Tunnel::Build (uint32_t replyMsgID, std::shared_ptr<OutboundTunnel> outboundTunnel)
{
@ -33,7 +33,7 @@ namespace tunnel
int numRecords = numHops <= STANDARD_NUM_RECORDS ? STANDARD_NUM_RECORDS : numHops;
auto msg = NewI2NPShortMessage ();
*msg->GetPayload () = numRecords;
msg->len += numRecords*TUNNEL_BUILD_RECORD_SIZE + 1;
msg->len += numRecords*TUNNEL_BUILD_RECORD_SIZE + 1;
// shuffle records
std::vector<int> recordIndicies;
@ -56,13 +56,13 @@ namespace tunnel
hop->recordIndex = idx;
i++;
hop = hop->next;
}
// fill up fake records with random data
}
// fill up fake records with random data
for (int i = numHops; i < numRecords; i++)
{
int idx = recordIndicies[i];
RAND_bytes (records + idx*TUNNEL_BUILD_RECORD_SIZE, TUNNEL_BUILD_RECORD_SIZE);
}
}
// decrypt real records
i2p::crypto::CBCDecryption decryption;
@ -73,31 +73,31 @@ namespace tunnel
// decrypt records after current hop
TunnelHopConfig * hop1 = hop->next;
while (hop1)
{
{
decryption.SetIV (hop->replyIV);
uint8_t * record = records + hop1->recordIndex*TUNNEL_BUILD_RECORD_SIZE;
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
hop1 = hop1->next;
}
}
hop = hop->prev;
}
}
msg->FillI2NPMessageHeader (eI2NPVariableTunnelBuild);
// send message
if (outboundTunnel)
outboundTunnel->SendTunnelDataMsg (GetNextIdentHash (), 0, msg);
outboundTunnel->SendTunnelDataMsg (GetNextIdentHash (), 0, msg);
else
i2p::transport::transports.SendMessage (GetNextIdentHash (), msg);
}
}
bool Tunnel::HandleTunnelBuildResponse (uint8_t * msg, size_t len)
{
LogPrint (eLogDebug, "Tunnel: TunnelBuildResponse ", (int)msg[0], " records.");
i2p::crypto::CBCDecryption decryption;
TunnelHopConfig * hop = m_Config->GetLastHop ();
while (hop)
{
{
decryption.SetKey (hop->replyKey);
// decrypt records before and including current hop
TunnelHopConfig * hop1 = hop;
@ -105,22 +105,22 @@ namespace tunnel
{
auto idx = hop1->recordIndex;
if (idx >= 0 && idx < msg[0])
{
{
uint8_t * record = msg + 1 + idx*TUNNEL_BUILD_RECORD_SIZE;
decryption.SetIV (hop->replyIV);
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
}
}
else
LogPrint (eLogWarning, "Tunnel: hop index ", idx, " is out of range");
hop1 = hop1->prev;
}
}
hop = hop->prev;
}
bool established = true;
hop = m_Config->GetFirstHop ();
while (hop)
{
{
const uint8_t * record = msg + 1 + hop->recordIndex*TUNNEL_BUILD_RECORD_SIZE;
uint8_t ret = record[BUILD_RESPONSE_RECORD_RET_OFFSET];
LogPrint (eLogDebug, "Tunnel: Build response ret code=", (int)ret);
@ -143,12 +143,12 @@ namespace tunnel
tunnelHop->decryption.SetKeys (hop->layerKey, hop->ivKey);
m_Hops.push_back (std::unique_ptr<TunnelHop>(tunnelHop));
hop = hop->prev;
}
}
m_Config = nullptr;
}
}
if (established) m_State = eTunnelStateEstablished;
return established;
}
}
void Tunnel::EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out)
{
@ -158,20 +158,20 @@ namespace tunnel
{
it->decryption.Decrypt (inPayload, outPayload);
inPayload = outPayload;
}
}
}
}
void Tunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
{
LogPrint (eLogWarning, "Tunnel: Can't send I2NP messages without delivery instructions");
}
}
std::vector<std::shared_ptr<const i2p::data::IdentityEx> > Tunnel::GetPeers () const
{
auto peers = GetInvertedPeers ();
std::reverse (peers.begin (), peers.end ());
std::reverse (peers.begin (), peers.end ());
return peers;
}
}
std::vector<std::shared_ptr<const i2p::data::IdentityEx> > Tunnel::GetInvertedPeers () const
{
@ -179,54 +179,54 @@ namespace tunnel
std::vector<std::shared_ptr<const i2p::data::IdentityEx> > ret;
for (auto& it: m_Hops)
ret.push_back (it->ident);
return ret;
}
return ret;
}
void Tunnel::PrintHops (std::stringstream& s) const
{
for (auto& it: m_Hops)
{
s << " ⇒ ";
{
s << " &#8658; ";
s << i2p::data::GetIdentHashAbbreviation (it->ident->GetIdentHash ());
}
}
}
}
void InboundTunnel::HandleTunnelDataMsg (std::shared_ptr<const I2NPMessage> msg)
{
if (IsFailed ()) SetState (eTunnelStateEstablished); // incoming messages means a tunnel is alive
if (IsFailed ()) SetState (eTunnelStateEstablished); // incoming messages means a tunnel is alive
auto newMsg = CreateEmptyTunnelDataMsg ();
EncryptTunnelMsg (msg, newMsg);
newMsg->from = shared_from_this ();
m_Endpoint.HandleDecryptedTunnelDataMsg (newMsg);
}
m_Endpoint.HandleDecryptedTunnelDataMsg (newMsg);
}
void InboundTunnel::Print (std::stringstream& s) const
{
PrintHops (s);
s << " ⇒ " << GetTunnelID () << ":me";
}
s << " &#8658; " << GetTunnelID () << ":me";
}
ZeroHopsInboundTunnel::ZeroHopsInboundTunnel ():
InboundTunnel (std::make_shared<ZeroHopsTunnelConfig> ()),
m_NumReceivedBytes (0)
{
}
}
void ZeroHopsInboundTunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
{
if (msg)
{
{
m_NumReceivedBytes += msg->GetLength ();
msg->from = shared_from_this ();
HandleI2NPMessage (msg);
}
}
}
}
void ZeroHopsInboundTunnel::Print (std::stringstream& s) const
{
s << " ⇒ " << GetTunnelID () << ":me";
}
s << " &#8658; " << GetTunnelID () << ":me";
}
void OutboundTunnel::SendTunnelDataMsg (const uint8_t * gwHash, uint32_t gwTunnel, std::shared_ptr<i2p::I2NPMessage> msg)
{
TunnelMessageBlock block;
@ -234,28 +234,28 @@ namespace tunnel
{
block.hash = gwHash;
if (gwTunnel)
{
{
block.deliveryType = eDeliveryTypeTunnel;
block.tunnelID = gwTunnel;
}
}
else
block.deliveryType = eDeliveryTypeRouter;
}
else
}
else
block.deliveryType = eDeliveryTypeLocal;
block.data = msg;
SendTunnelDataMsg ({block});
}
void OutboundTunnel::SendTunnelDataMsg (const std::vector<TunnelMessageBlock>& msgs)
{
std::unique_lock<std::mutex> l(m_SendMutex);
for (auto& it : msgs)
m_Gateway.PutTunnelDataMsg (it);
m_Gateway.SendBuffer ();
}
}
void OutboundTunnel::HandleTunnelDataMsg (std::shared_ptr<const i2p::I2NPMessage> tunnelMsg)
{
LogPrint (eLogError, "Tunnel: incoming message for outbound tunnel ", GetTunnelID ());
@ -265,9 +265,9 @@ namespace tunnel
{
s << GetTunnelID () << ":me";
PrintHops (s);
s << " ⇒ ";
}
s << " &#8658; ";
}
ZeroHopsOutboundTunnel::ZeroHopsOutboundTunnel ():
OutboundTunnel (std::make_shared<ZeroHopsTunnelConfig> ()),
m_NumSentBytes (0)
@ -286,30 +286,30 @@ namespace tunnel
case eDeliveryTypeTunnel:
i2p::transport::transports.SendMessage (msg.hash, i2p::CreateTunnelGatewayMsg (msg.tunnelID, msg.data));
break;
case eDeliveryTypeRouter:
case eDeliveryTypeRouter:
i2p::transport::transports.SendMessage (msg.hash, msg.data);
break;
default:
LogPrint (eLogError, "Tunnel: Unknown delivery type ", (int)msg.deliveryType);
}
}
}
}
void ZeroHopsOutboundTunnel::Print (std::stringstream& s) const
{
s << GetTunnelID () << ":me ⇒ ";
s << GetTunnelID () << ":me &#8658; ";
}
Tunnels tunnels;
Tunnels::Tunnels (): m_IsRunning (false), m_Thread (nullptr),
m_NumSuccesiveTunnelCreations (0), m_NumFailedTunnelCreations (0)
{
}
Tunnels::~Tunnels ()
Tunnels::~Tunnels ()
{
}
}
std::shared_ptr<TunnelBase> Tunnels::GetTunnel (uint32_t tunnelID)
{
@ -317,29 +317,29 @@ namespace tunnel
if (it != m_Tunnels.end ())
return it->second;
return nullptr;
}
}
std::shared_ptr<InboundTunnel> Tunnels::GetPendingInboundTunnel (uint32_t replyMsgID)
{
return GetPendingTunnel (replyMsgID, m_PendingInboundTunnels);
return GetPendingTunnel (replyMsgID, m_PendingInboundTunnels);
}
std::shared_ptr<OutboundTunnel> Tunnels::GetPendingOutboundTunnel (uint32_t replyMsgID)
{
return GetPendingTunnel (replyMsgID, m_PendingOutboundTunnels);
}
return GetPendingTunnel (replyMsgID, m_PendingOutboundTunnels);
}
template<class TTunnel>
template<class TTunnel>
std::shared_ptr<TTunnel> Tunnels::GetPendingTunnel (uint32_t replyMsgID, const std::map<uint32_t, std::shared_ptr<TTunnel> >& pendingTunnels)
{
auto it = pendingTunnels.find(replyMsgID);
if (it != pendingTunnels.end () && it->second->GetState () == eTunnelStatePending)
{
it->second->SetState (eTunnelStateBuildReplyReceived);
{
it->second->SetState (eTunnelStateBuildReplyReceived);
return it->second;
}
return nullptr;
}
}
std::shared_ptr<InboundTunnel> Tunnels::GetNextInboundTunnel ()
{
@ -353,26 +353,26 @@ namespace tunnel
tunnel = it;
minReceived = it->GetNumReceivedBytes ();
}
}
}
return tunnel;
}
std::shared_ptr<OutboundTunnel> Tunnels::GetNextOutboundTunnel ()
{
if (m_OutboundTunnels.empty ()) return nullptr;
uint32_t ind = rand () % m_OutboundTunnels.size (), i = 0;
std::shared_ptr<OutboundTunnel> tunnel;
for (const auto& it: m_OutboundTunnels)
{
{
if (it->IsEstablished ())
{
tunnel = it;
i++;
}
if (i > ind && tunnel) break;
}
}
return tunnel;
}
}
std::shared_ptr<TunnelPool> Tunnels::CreateTunnelPool (int numInboundHops,
int numOutboundHops, int numInboundTunnels, int numOutboundTunnels)
@ -381,19 +381,19 @@ namespace tunnel
std::unique_lock<std::mutex> l(m_PoolsMutex);
m_Pools.push_back (pool);
return pool;
}
}
void Tunnels::DeleteTunnelPool (std::shared_ptr<TunnelPool> pool)
{
if (pool)
{
{
StopTunnelPool (pool);
{
std::unique_lock<std::mutex> l(m_PoolsMutex);
m_Pools.remove (pool);
}
}
}
}
}
}
void Tunnels::StopTunnelPool (std::shared_ptr<TunnelPool> pool)
{
@ -401,47 +401,47 @@ namespace tunnel
{
pool->SetActive (false);
pool->DetachTunnels ();
}
}
}
}
void Tunnels::AddTransitTunnel (std::shared_ptr<TransitTunnel> tunnel)
{
if (m_Tunnels.emplace (tunnel->GetTunnelID (), tunnel).second)
m_TransitTunnels.push_back (tunnel);
else
LogPrint (eLogError, "Tunnel: tunnel with id ", tunnel->GetTunnelID (), " already exists");
}
}
void Tunnels::Start ()
{
m_IsRunning = true;
m_Thread = new std::thread (std::bind (&Tunnels::Run, this));
}
void Tunnels::Stop ()
{
m_IsRunning = false;
m_Queue.WakeUp ();
if (m_Thread)
{
{
m_Thread->join ();
delete m_Thread;
m_Thread = 0;
}
}
}
}
void Tunnels::Run ()
{
std::this_thread::sleep_for (std::chrono::seconds(1)); // wait for other parts are ready
uint64_t lastTs = 0;
while (m_IsRunning)
{
try
{
{
auto msg = m_Queue.GetNextWithTimeout (1000); // 1 sec
if (msg)
{
{
uint32_t prevTunnelID = 0, tunnelID = 0;
std::shared_ptr<TunnelBase> prevTunnel;
do
@ -449,16 +449,16 @@ namespace tunnel
std::shared_ptr<TunnelBase> tunnel;
uint8_t typeID = msg->GetTypeID ();
switch (typeID)
{
{
case eI2NPTunnelData:
case eI2NPTunnelGateway:
{
{
tunnelID = bufbe32toh (msg->GetPayload ());
if (tunnelID == prevTunnelID)
tunnel = prevTunnel;
else if (prevTunnel)
prevTunnel->FlushTunnelDataMsgs ();
if (!tunnel)
tunnel = GetTunnel (tunnelID);
if (tunnel)
@ -472,17 +472,17 @@ namespace tunnel
LogPrint (eLogWarning, "Tunnel: tunnel not found, tunnelID=", tunnelID, " previousTunnelID=", prevTunnelID, " type=", (int)typeID);
break;
}
case eI2NPVariableTunnelBuild:
}
case eI2NPVariableTunnelBuild:
case eI2NPVariableTunnelBuildReply:
case eI2NPTunnelBuild:
case eI2NPTunnelBuildReply:
case eI2NPTunnelBuildReply:
HandleI2NPMessage (msg->GetBuffer (), msg->GetLength ());
break;
break;
default:
LogPrint (eLogWarning, "Tunnel: unexpected messsage type ", (int) typeID);
}
msg = m_Queue.Get ();
if (msg)
{
@ -493,8 +493,8 @@ namespace tunnel
tunnel->FlushTunnelDataMsgs ();
}
while (msg);
}
}
uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
if (ts - lastTs >= 15) // manage tunnels every 15 seconds
{
@ -505,9 +505,9 @@ namespace tunnel
catch (std::exception& ex)
{
LogPrint (eLogError, "Tunnel: runtime exception: ", ex.what ());
}
}
}
}
}
}
void Tunnels::HandleTunnelGatewayMsg (std::shared_ptr<TunnelBase> tunnel, std::shared_ptr<I2NPMessage> msg)
{
@ -528,7 +528,7 @@ namespace tunnel
msg->len = msg->offset + len;
auto typeID = msg->GetTypeID ();
LogPrint (eLogDebug, "Tunnel: gateway of ", (int) len, " bytes for tunnel ", tunnel->GetTunnelID (), ", msg type ", (int)typeID);
if (IsRouterInfoMsg (msg) || typeID == eI2NPDatabaseSearchReply)
// transit DatabaseStore my contain new/updated RI
// or DatabaseSearchReply with new routers
@ -543,7 +543,7 @@ namespace tunnel
ManageOutboundTunnels ();
ManageTransitTunnels ();
ManageTunnelPools ();
}
}
void Tunnels::ManagePendingTunnels ()
{
@ -557,7 +557,7 @@ namespace tunnel
// check pending tunnel. delete failed or timeout
uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
for (auto it = pendingTunnels.begin (); it != pendingTunnels.end ();)
{
{
auto tunnel = it->second;
switch (tunnel->GetState ())
{
@ -579,8 +579,8 @@ namespace tunnel
profile->TunnelNonReplied ();
}
hop = hop->next;
}
}
}
}
// delete
it = pendingTunnels.erase (it);
m_NumFailedTunnelCreations++;
@ -596,13 +596,13 @@ namespace tunnel
case eTunnelStateBuildReplyReceived:
// intermediate state, will be either established of build failed
++it;
break;
break;
default:
// success
it = pendingTunnels.erase (it);
m_NumSuccesiveTunnelCreations++;
}
}
}
}
}
void Tunnels::ManageOutboundTunnels ()
@ -620,26 +620,26 @@ namespace tunnel
pool->TunnelExpired (tunnel);
// we don't have outbound tunnels in m_Tunnels
it = m_OutboundTunnels.erase (it);
}
}
else
{
if (tunnel->IsEstablished ())
{
{
if (!tunnel->IsRecreated () && ts + TUNNEL_RECREATION_THRESHOLD > tunnel->GetCreationTime () + TUNNEL_EXPIRATION_TIMEOUT)
{
tunnel->SetIsRecreated ();
tunnel->SetIsRecreated ();
auto pool = tunnel->GetTunnelPool ();
if (pool)
pool->RecreateOutboundTunnel (tunnel);
}
if (ts + TUNNEL_EXPIRATION_THRESHOLD > tunnel->GetCreationTime () + TUNNEL_EXPIRATION_TIMEOUT)
tunnel->SetState (eTunnelStateExpiring);
}
}
++it;
}
}
}
}
if (m_OutboundTunnels.size () < 5)
{
// trying to create one more oubound tunnel
@ -648,12 +648,12 @@ namespace tunnel
if (!inboundTunnel || !router) return;
LogPrint (eLogDebug, "Tunnel: creating one hop outbound tunnel");
CreateTunnel<OutboundTunnel> (
std::make_shared<TunnelConfig> (std::vector<std::shared_ptr<const i2p::data::IdentityEx> > { router->GetRouterIdentity () },
inboundTunnel->GetNextTunnelID (), inboundTunnel->GetNextIdentHash ())
);
std::make_shared<TunnelConfig> (std::vector<std::shared_ptr<const i2p::data::IdentityEx> > { router->GetRouterIdentity () },
inboundTunnel->GetNextTunnelID (), inboundTunnel->GetNextIdentHash ())
);
}
}
void Tunnels::ManageInboundTunnels ()
{
uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
@ -669,26 +669,26 @@ namespace tunnel
pool->TunnelExpired (tunnel);
m_Tunnels.erase (tunnel->GetTunnelID ());
it = m_InboundTunnels.erase (it);
}
}
else
{
if (tunnel->IsEstablished ())
{
{
if (!tunnel->IsRecreated () && ts + TUNNEL_RECREATION_THRESHOLD > tunnel->GetCreationTime () + TUNNEL_EXPIRATION_TIMEOUT)
{
tunnel->SetIsRecreated ();
tunnel->SetIsRecreated ();
auto pool = tunnel->GetTunnelPool ();
if (pool)
pool->RecreateInboundTunnel (tunnel);
}
if (ts + TUNNEL_EXPIRATION_THRESHOLD > tunnel->GetCreationTime () + TUNNEL_EXPIRATION_TIMEOUT)
tunnel->SetState (eTunnelStateExpiring);
}
}
it++;
}
}
}
}
if (m_InboundTunnels.empty ())
{
@ -702,10 +702,10 @@ namespace tunnel
}
return;
}
if (m_OutboundTunnels.empty () || m_InboundTunnels.size () < 5)
{
// trying to create one more inbound tunnel
// trying to create one more inbound tunnel
auto router = i2p::data::netdb.GetRandomRouter ();
if (!router) {
LogPrint (eLogWarning, "Tunnel: can't find any router, skip creating tunnel");
@ -714,9 +714,9 @@ namespace tunnel
LogPrint (eLogDebug, "Tunnel: creating one hop inbound tunnel");
CreateTunnel<InboundTunnel> (
std::make_shared<TunnelConfig> (std::vector<std::shared_ptr<const i2p::data::IdentityEx> > { router->GetRouterIdentity () })
);
);
}
}
}
void Tunnels::ManageTransitTunnels ()
{
@ -729,35 +729,35 @@ namespace tunnel
LogPrint (eLogDebug, "Tunnel: Transit tunnel with id ", tunnel->GetTunnelID (), " expired");
m_Tunnels.erase (tunnel->GetTunnelID ());
it = m_TransitTunnels.erase (it);
}
}
else
it++;
}
}
}
void Tunnels::ManageTunnelPools ()
{
std::unique_lock<std::mutex> l(m_PoolsMutex);
for (auto& pool : m_Pools)
{
{
if (pool && pool->IsActive ())
{
{
pool->CreateTunnels ();
pool->TestTunnels ();
}
}
}
}
}
void Tunnels::PostTunnelData (std::shared_ptr<I2NPMessage> msg)
{
if (msg) m_Queue.Put (msg);
}
if (msg) m_Queue.Put (msg);
}
void Tunnels::PostTunnelData (const std::vector<std::shared_ptr<I2NPMessage> >& msgs)
{
m_Queue.Put (msgs);
}
}
template<class TTunnel>
std::shared_ptr<TTunnel> Tunnels::CreateTunnel (std::shared_ptr<TunnelConfig> config, std::shared_ptr<OutboundTunnel> outboundTunnel)
{
@ -767,7 +767,7 @@ namespace tunnel
AddPendingTunnel (replyMsgID, newTunnel);
newTunnel->Build (replyMsgID, outboundTunnel);
return newTunnel;
}
}
std::shared_ptr<InboundTunnel> Tunnels::CreateInboundTunnel (std::shared_ptr<TunnelConfig> config, std::shared_ptr<OutboundTunnel> outboundTunnel)
{
@ -804,20 +804,20 @@ namespace tunnel
pool->TunnelCreated (newTunnel);
else
newTunnel->SetTunnelPool (nullptr);
}
}
void Tunnels::AddInboundTunnel (std::shared_ptr<InboundTunnel> newTunnel)
{
if (m_Tunnels.emplace (newTunnel->GetTunnelID (), newTunnel).second)
{
{
m_InboundTunnels.push_back (newTunnel);
auto pool = newTunnel->GetTunnelPool ();
if (!pool)
{
{
// build symmetric outbound tunnel
CreateTunnel<OutboundTunnel> (std::make_shared<TunnelConfig>(newTunnel->GetInvertedPeers (),
newTunnel->GetNextTunnelID (), newTunnel->GetNextIdentHash ()),
GetNextOutboundTunnel ());
GetNextOutboundTunnel ());
}
else
{
@ -829,9 +829,9 @@ namespace tunnel
}
else
LogPrint (eLogError, "Tunnel: tunnel with id ", newTunnel->GetTunnelID (), " already exists");
}
}
std::shared_ptr<ZeroHopsInboundTunnel> Tunnels::CreateZeroHopsInboundTunnel ()
{
auto inboundTunnel = std::make_shared<ZeroHopsInboundTunnel> ();
@ -839,7 +839,7 @@ namespace tunnel
m_InboundTunnels.push_back (inboundTunnel);
m_Tunnels[inboundTunnel->GetTunnelID ()] = inboundTunnel;
return inboundTunnel;
}
}
std::shared_ptr<ZeroHopsOutboundTunnel> Tunnels::CreateZeroHopsOutboundTunnel ()
{
@ -859,7 +859,7 @@ namespace tunnel
{
int t = it->GetCreationTime () + TUNNEL_EXPIRATION_TIMEOUT - ts;
if (t > timeout) timeout = t;
}
}
return timeout;
}
@ -882,4 +882,3 @@ namespace tunnel
}
}
}

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