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#include <fstream>
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#include <cryptopp/dh.h>
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#include <cryptopp/dsa.h>
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#include "CryptoConst.h"
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#include "RouterContext.h"
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#include "Timestamp.h"
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#include "I2NPProtocol.h"
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#include "util.h"
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#include "version.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_IsUnreachable (false), m_AcceptsTunnels (true)
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{
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}
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void RouterContext::Init ()
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{
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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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m_Keys = i2p::data::CreateRandomKeys ();
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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 ().GetStandardIdentity ());
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int port = i2p::util::config::GetArg("-port", 0);
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if (!port)
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port = m_Rnd.GenerateWord32 (9111, 30777); // I2P network ports range
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routerInfo.AddSSUAddress (i2p::util::config::GetCharArg("-host", "127.0.0.1"), port, routerInfo.GetIdentHash ());
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routerInfo.AddNTCPAddress (i2p::util::config::GetCharArg("-host", "127.0.0.1"), 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.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::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 char * host)
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{
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bool updated = false;
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auto newAddress = boost::asio::ip::address::from_string (host);
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address.host != newAddress && address.IsCompatible (newAddress))
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{
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address.host = newAddress;
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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& routerInfo, uint32_t tag)
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{
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bool ret = false;
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auto address = routerInfo.GetSSUAddress ();
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if (address)
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{
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ret = m_RouterInfo.AddIntroducer (address, tag);
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if (ret)
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UpdateRouterInfo ();
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}
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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::SetUnreachable ()
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{
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m_IsUnreachable = true;
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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::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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}
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void RouterContext::UpdateV6Address (const std::string& 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 newAddress = boost::asio::ip::address::from_string (host);
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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 ())
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{
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if (addr.host != newAddress)
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{
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addr.host = newAddress;
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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.c_str (), port);
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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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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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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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i2p::data::RouterInfo routerInfo(i2p::util::filesystem::GetFullPath (ROUTER_INFO)); // TODO
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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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return true;
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}
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void RouterContext::SaveKeys ()
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{
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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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i2p::data::Keys keys;
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memcpy (keys.privateKey, m_Keys.GetPrivateKey (), sizeof (keys.privateKey));
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memcpy (keys.signingPrivateKey, m_Keys.GetSigningPrivateKey (), sizeof (keys.signingPrivateKey));
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auto& ident = GetIdentity ().GetStandardIdentity ();
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memcpy (keys.publicKey, ident.publicKey, sizeof (keys.publicKey));
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memcpy (keys.signingKey, ident.signingKey, sizeof (keys.signingKey));
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fk.write ((char *)&keys, sizeof (keys));
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}
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void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len, 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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}
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