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354 lines
9.7 KiB
C++
354 lines
9.7 KiB
C++
#include <fstream>
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#include <boost/lexical_cast.hpp>
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#include "Crypto.h"
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#include "Timestamp.h"
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#include "I2NPProtocol.h"
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#include "NetDb.h"
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#include "util.h"
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#include "version.h"
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#include "Log.h"
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#include "RouterContext.h"
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namespace i2p
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{
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RouterContext context;
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RouterContext::RouterContext ():
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m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false),
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m_StartupTime (0), m_Status (eRouterStatusOK )
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{
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}
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void RouterContext::Init ()
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{
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srand (i2p::util::GetMillisecondsSinceEpoch () % 1000);
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m_StartupTime = i2p::util::GetSecondsSinceEpoch ();
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if (!Load ())
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CreateNewRouter ();
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UpdateRouterInfo ();
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}
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void RouterContext::CreateNewRouter ()
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{
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#if defined(__x86_64__) || defined(__i386__) || defined(_MSC_VER)
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m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519);
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#else
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m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_DSA_SHA1);
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#endif
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SaveKeys ();
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NewRouterInfo ();
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}
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void RouterContext::NewRouterInfo ()
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{
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i2p::data::RouterInfo routerInfo;
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routerInfo.SetRouterIdentity (GetIdentity ());
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int port = i2p::util::config::GetArg("-port", 0);
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if (!port)
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port = rand () % (30777 - 9111) + 9111; // I2P network ports range
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routerInfo.AddSSUAddress (i2p::util::config::GetArg("-host", "127.0.0.1").c_str (), port, routerInfo.GetIdentHash ());
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routerInfo.AddNTCPAddress (i2p::util::config::GetArg("-host", "127.0.0.1").c_str (), port);
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routerInfo.SetCaps (i2p::data::RouterInfo::eReachable |
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i2p::data::RouterInfo::eSSUTesting | i2p::data::RouterInfo::eSSUIntroducer); // LR, BC
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routerInfo.SetProperty ("coreVersion", I2P_VERSION);
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routerInfo.SetProperty ("netId", "2");
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routerInfo.SetProperty ("router.version", I2P_VERSION);
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routerInfo.SetProperty ("stat_uptime", "90m");
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routerInfo.CreateBuffer (m_Keys);
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m_RouterInfo.SetRouterIdentity (GetIdentity ());
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m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ());
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}
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void RouterContext::UpdateRouterInfo ()
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{
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m_RouterInfo.CreateBuffer (m_Keys);
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m_RouterInfo.SaveToFile (i2p::util::filesystem::GetFullPath (ROUTER_INFO));
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m_LastUpdateTime = i2p::util::GetSecondsSinceEpoch ();
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}
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void RouterContext::SetStatus (RouterStatus status)
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{
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if (status != m_Status)
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{
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m_Status = status;
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switch (m_Status)
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{
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case eRouterStatusOK:
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SetReachable ();
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break;
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case eRouterStatusFirewalled:
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SetUnreachable ();
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break;
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default:
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;
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}
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}
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}
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void RouterContext::UpdatePort (int port)
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{
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address.port != port)
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{
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address.port = port;
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updated = true;
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}
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateAddress (const boost::asio::ip::address& host)
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{
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address.host != host && address.IsCompatible (host))
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{
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address.host = host;
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updated = true;
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}
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}
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auto ts = i2p::util::GetSecondsSinceEpoch ();
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if (updated || ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL)
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UpdateRouterInfo ();
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}
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bool RouterContext::AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer)
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{
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bool ret = m_RouterInfo.AddIntroducer (introducer);
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if (ret)
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UpdateRouterInfo ();
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return ret;
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}
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void RouterContext::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e)
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{
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if (m_RouterInfo.RemoveIntroducer (e))
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UpdateRouterInfo ();
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}
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void RouterContext::SetFloodfill (bool floodfill)
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{
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m_IsFloodfill = floodfill;
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if (floodfill)
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m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () | i2p::data::RouterInfo::eFloodfill);
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else
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{
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m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eFloodfill);
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// we don't publish number of routers and leaseset for non-floodfill
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m_RouterInfo.DeleteProperty (ROUTER_INFO_PROPERTY_LEASESETS);
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m_RouterInfo.DeleteProperty (ROUTER_INFO_PROPERTY_ROUTERS);
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}
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UpdateRouterInfo ();
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}
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void RouterContext::SetHighBandwidth ()
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{
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if (!m_RouterInfo.IsHighBandwidth ())
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{
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m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () | i2p::data::RouterInfo::eHighBandwidth);
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UpdateRouterInfo ();
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}
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}
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void RouterContext::SetLowBandwidth ()
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{
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if (m_RouterInfo.IsHighBandwidth ())
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{
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m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eHighBandwidth);
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UpdateRouterInfo ();
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}
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}
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bool RouterContext::IsUnreachable () const
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{
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return m_RouterInfo.GetCaps () & i2p::data::RouterInfo::eUnreachable;
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}
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void RouterContext::SetUnreachable ()
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{
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// set caps
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m_RouterInfo.SetCaps (i2p::data::RouterInfo::eUnreachable | i2p::data::RouterInfo::eSSUTesting); // LU, B
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// remove NTCP address
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auto& addresses = m_RouterInfo.GetAddresses ();
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for (size_t i = 0; i < addresses.size (); i++)
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{
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if (addresses[i].transportStyle == i2p::data::RouterInfo::eTransportNTCP)
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{
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addresses.erase (addresses.begin () + i);
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break;
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}
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}
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// delete previous introducers
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for (auto& addr : addresses)
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addr.introducers.clear ();
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// update
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UpdateRouterInfo ();
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}
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void RouterContext::SetReachable ()
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{
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// update caps
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uint8_t caps = m_RouterInfo.GetCaps ();
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caps &= ~i2p::data::RouterInfo::eUnreachable;
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caps |= i2p::data::RouterInfo::eReachable;
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caps |= i2p::data::RouterInfo::eSSUIntroducer;
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if (m_IsFloodfill)
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caps |= i2p::data::RouterInfo::eFloodfill;
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m_RouterInfo.SetCaps (caps);
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// insert NTCP back
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auto& addresses = m_RouterInfo.GetAddresses ();
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for (size_t i = 0; i < addresses.size (); i++)
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{
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if (addresses[i].transportStyle == i2p::data::RouterInfo::eTransportSSU)
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{
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// insert NTCP address with host/port from SSU
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m_RouterInfo.AddNTCPAddress (addresses[i].host.to_string ().c_str (), addresses[i].port);
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break;
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}
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}
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// delete previous introducers
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for (auto& addr : addresses)
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addr.introducers.clear ();
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// update
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UpdateRouterInfo ();
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}
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void RouterContext::SetSupportsV6 (bool supportsV6)
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{
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if (supportsV6)
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m_RouterInfo.EnableV6 ();
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else
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m_RouterInfo.DisableV6 ();
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateNTCPV6Address (const boost::asio::ip::address& host)
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{
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bool updated = false, found = false;
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int port = 0;
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auto& addresses = m_RouterInfo.GetAddresses ();
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for (auto& addr : addresses)
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{
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if (addr.host.is_v6 () && addr.transportStyle == i2p::data::RouterInfo::eTransportNTCP)
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{
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if (addr.host != host)
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{
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addr.host = host;
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updated = true;
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}
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found = true;
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}
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else
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port = addr.port;
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}
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if (!found)
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{
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// create new address
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m_RouterInfo.AddNTCPAddress (host.to_string ().c_str (), port);
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auto mtu = i2p::util::net::GetMTU (host);
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if (mtu)
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{
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LogPrint (eLogDebug, "Router: Our v6 MTU=", mtu);
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if (mtu > 1472) { // TODO: magic constant
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mtu = 1472;
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LogPrint(eLogWarning, "Router: MTU dropped to upper limit of 1472 bytes");
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}
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}
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m_RouterInfo.AddSSUAddress (host.to_string ().c_str (), port, GetIdentHash (), mtu ? mtu : 1472); // TODO
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updated = true;
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateStats ()
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{
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if (m_IsFloodfill)
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{
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// update routers and leasesets
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m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_LEASESETS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumLeaseSets ()));
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m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_ROUTERS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumRouters ()));
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UpdateRouterInfo ();
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}
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}
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bool RouterContext::Load ()
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{
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std::ifstream fk (i2p::util::filesystem::GetFullPath (ROUTER_KEYS).c_str (), std::ifstream::binary | std::ofstream::in);
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if (!fk.is_open ()) return false;
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fk.seekg (0, std::ios::end);
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size_t len = fk.tellg();
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fk.seekg (0, std::ios::beg);
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if (len == sizeof (i2p::data::Keys)) // old keys file format
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{
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i2p::data::Keys keys;
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fk.read ((char *)&keys, sizeof (keys));
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m_Keys = keys;
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}
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else // new keys file format
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{
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uint8_t * buf = new uint8_t[len];
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fk.read ((char *)buf, len);
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m_Keys.FromBuffer (buf, len);
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delete[] buf;
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}
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i2p::data::RouterInfo routerInfo(i2p::util::filesystem::GetFullPath (ROUTER_INFO)); // TODO
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m_RouterInfo.SetRouterIdentity (GetIdentity ());
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m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ());
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m_RouterInfo.SetProperty ("coreVersion", I2P_VERSION);
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m_RouterInfo.SetProperty ("router.version", I2P_VERSION);
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if (IsUnreachable ())
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SetReachable (); // we assume reachable until we discover firewall through peer tests
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return true;
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}
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void RouterContext::SaveKeys ()
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{
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// save in the same format as .dat files
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std::ofstream fk (i2p::util::filesystem::GetFullPath (ROUTER_KEYS).c_str (), std::ofstream::binary | std::ofstream::out);
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size_t len = m_Keys.GetFullLen ();
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uint8_t * buf = new uint8_t[len];
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m_Keys.ToBuffer (buf, len);
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fk.write ((char *)buf, len);
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delete[] buf;
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}
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std::shared_ptr<i2p::tunnel::TunnelPool> RouterContext::GetTunnelPool () const
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{
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return i2p::tunnel::tunnels.GetExploratoryPool ();
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}
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void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
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{
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i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from));
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}
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void RouterContext::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg)
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{
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std::unique_lock<std::mutex> l(m_GarlicMutex);
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i2p::garlic::GarlicDestination::ProcessGarlicMessage (msg);
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}
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void RouterContext::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
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{
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std::unique_lock<std::mutex> l(m_GarlicMutex);
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i2p::garlic::GarlicDestination::ProcessDeliveryStatusMessage (msg);
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}
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uint32_t RouterContext::GetUptime () const
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{
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return i2p::util::GetSecondsSinceEpoch () - m_StartupTime;
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}
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}
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