mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
945 lines
28 KiB
945 lines
28 KiB
/* |
|
* Copyright (c) 2013-2020, The PurpleI2P Project |
|
* |
|
* This file is part of Purple i2pd project and licensed under BSD3 |
|
* |
|
* See full license text in LICENSE file at top of project tree |
|
*/ |
|
|
|
#include <fstream> |
|
#include <openssl/rand.h> |
|
#include "Config.h" |
|
#include "Crypto.h" |
|
#include "Ed25519.h" |
|
#include "Timestamp.h" |
|
#include "I2NPProtocol.h" |
|
#include "NetDb.hpp" |
|
#include "FS.h" |
|
#include "util.h" |
|
#include "version.h" |
|
#include "Log.h" |
|
#include "Family.h" |
|
#include "ECIESX25519AEADRatchetSession.h" |
|
#include "RouterContext.h" |
|
|
|
namespace i2p |
|
{ |
|
RouterContext context; |
|
|
|
RouterContext::RouterContext (): |
|
m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false), |
|
m_ShareRatio (100), m_Status (eRouterStatusUnknown), m_StatusV6 (eRouterStatusUnknown), |
|
m_Error (eRouterErrorNone), m_NetID (I2PD_NET_ID) |
|
{ |
|
} |
|
|
|
void RouterContext::Init () |
|
{ |
|
srand (i2p::util::GetMillisecondsSinceEpoch () % 1000); |
|
m_StartupTime = std::chrono::steady_clock::now(); |
|
|
|
if (!Load ()) |
|
CreateNewRouter (); |
|
m_Decryptor = m_Keys.CreateDecryptor (nullptr); |
|
m_TunnelDecryptor = m_Keys.CreateDecryptor (nullptr); |
|
UpdateRouterInfo (); |
|
if (IsECIES ()) |
|
{ |
|
i2p::crypto::InitNoiseNState (m_InitialNoiseState, GetIdentity ()->GetEncryptionPublicKey ()); |
|
m_ECIESSession = std::make_shared<i2p::garlic::RouterIncomingRatchetSession>(m_InitialNoiseState); |
|
} |
|
} |
|
|
|
void RouterContext::CreateNewRouter () |
|
{ |
|
m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519, |
|
i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD); |
|
SaveKeys (); |
|
NewRouterInfo (); |
|
} |
|
|
|
void RouterContext::NewRouterInfo () |
|
{ |
|
i2p::data::RouterInfo routerInfo; |
|
routerInfo.SetRouterIdentity (GetIdentity ()); |
|
uint16_t port; i2p::config::GetOption("port", port); |
|
if (!port) |
|
{ |
|
port = rand () % (30777 - 9111) + 9111; // I2P network ports range |
|
if (port == 9150) port = 9151; // Tor browser |
|
} |
|
bool ipv4; i2p::config::GetOption("ipv4", ipv4); |
|
bool ipv6; i2p::config::GetOption("ipv6", ipv6); |
|
bool ssu; i2p::config::GetOption("ssu", ssu); |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg); |
|
bool nat; i2p::config::GetOption("nat", nat); |
|
|
|
if ((ntcp2 || ygg) && !m_NTCP2Keys) |
|
NewNTCP2Keys (); |
|
bool ntcp2Published = false; |
|
if (ntcp2) |
|
{ |
|
i2p::config::GetOption("ntcp2.published", ntcp2Published); |
|
if (ntcp2Published) |
|
{ |
|
std::string ntcp2proxy; i2p::config::GetOption("ntcp2.proxy", ntcp2proxy); |
|
if (!ntcp2proxy.empty ()) ntcp2Published = false; |
|
} |
|
} |
|
uint8_t caps = 0, addressCaps = 0; |
|
if (ipv4) |
|
{ |
|
std::string host = "127.0.0.1"; |
|
if (!i2p::config::IsDefault("host")) |
|
i2p::config::GetOption("host", host); |
|
else if (!nat) |
|
{ |
|
// we have no NAT so set external address from local address |
|
std::string address4; i2p::config::GetOption("address4", address4); |
|
if (!address4.empty ()) host = address4; |
|
} |
|
|
|
if (ntcp2) |
|
{ |
|
if (ntcp2Published) |
|
routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v4::from_string (host), port); |
|
else // add non-published NTCP2 address |
|
{ |
|
addressCaps = i2p::data::RouterInfo::AddressCaps::eV4; |
|
routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv); |
|
} |
|
} |
|
if (ssu) |
|
{ |
|
routerInfo.AddSSUAddress (host.c_str(), port, nullptr); |
|
caps |= i2p::data::RouterInfo::eReachable; // R |
|
} |
|
} |
|
if (ipv6) |
|
{ |
|
std::string host = "::1"; |
|
if (!i2p::config::IsDefault("host") && !ipv4) // override if v6 only |
|
i2p::config::GetOption("host", host); |
|
else |
|
{ |
|
std::string address6; i2p::config::GetOption("address6", address6); |
|
if (!address6.empty ()) host = address6; |
|
} |
|
|
|
if (ntcp2) |
|
{ |
|
if (ntcp2Published) |
|
{ |
|
std::string ntcp2Host; |
|
if (!i2p::config::IsDefault ("ntcp2.addressv6")) |
|
i2p::config::GetOption ("ntcp2.addressv6", ntcp2Host); |
|
else |
|
ntcp2Host = host; |
|
routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v6::from_string (ntcp2Host), port); |
|
} |
|
else |
|
{ |
|
if (!ipv4) // no other ntcp2 addresses yet |
|
routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv); |
|
addressCaps |= i2p::data::RouterInfo::AddressCaps::eV6; |
|
} |
|
} |
|
if (ssu) |
|
{ |
|
routerInfo.AddSSUAddress (host.c_str(), port, nullptr); |
|
caps |= i2p::data::RouterInfo::eReachable; // R |
|
} |
|
} |
|
if (ygg) |
|
{ |
|
auto yggaddr = i2p::util::net::GetYggdrasilAddress (); |
|
if (!yggaddr.is_unspecified ()) |
|
routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, yggaddr, port); |
|
} |
|
|
|
if (addressCaps) |
|
routerInfo.SetUnreachableAddressesTransportCaps (addressCaps); |
|
routerInfo.SetCaps (caps); // caps + L |
|
routerInfo.SetProperty ("netId", std::to_string (m_NetID)); |
|
routerInfo.SetProperty ("router.version", I2P_VERSION); |
|
routerInfo.CreateBuffer (m_Keys); |
|
m_RouterInfo.SetRouterIdentity (GetIdentity ()); |
|
m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); |
|
} |
|
|
|
void RouterContext::UpdateRouterInfo () |
|
{ |
|
m_RouterInfo.CreateBuffer (m_Keys); |
|
m_RouterInfo.SaveToFile (i2p::fs::DataDirPath (ROUTER_INFO)); |
|
m_LastUpdateTime = i2p::util::GetSecondsSinceEpoch (); |
|
} |
|
|
|
void RouterContext::NewNTCP2Keys () |
|
{ |
|
m_StaticKeys.reset (new i2p::crypto::X25519Keys ()); |
|
m_StaticKeys->GenerateKeys (); |
|
m_NTCP2Keys.reset (new NTCP2PrivateKeys ()); |
|
m_StaticKeys->GetPrivateKey (m_NTCP2Keys->staticPrivateKey); |
|
memcpy (m_NTCP2Keys->staticPublicKey, m_StaticKeys->GetPublicKey (), 32); |
|
RAND_bytes (m_NTCP2Keys->iv, 16); |
|
// save |
|
std::ofstream fk (i2p::fs::DataDirPath (NTCP2_KEYS), std::ofstream::binary | std::ofstream::out); |
|
fk.write ((char *)m_NTCP2Keys.get (), sizeof (NTCP2PrivateKeys)); |
|
} |
|
|
|
void RouterContext::SetStatus (RouterStatus status) |
|
{ |
|
if (status != m_Status) |
|
{ |
|
m_Status = status; |
|
m_Error = eRouterErrorNone; |
|
switch (m_Status) |
|
{ |
|
case eRouterStatusOK: |
|
SetReachable (true, false); // ipv4 |
|
break; |
|
case eRouterStatusFirewalled: |
|
SetUnreachable (true, false); // ipv4 |
|
break; |
|
default: |
|
; |
|
} |
|
} |
|
} |
|
|
|
void RouterContext::SetStatusV6 (RouterStatus status) |
|
{ |
|
if (status != m_StatusV6) |
|
{ |
|
m_StatusV6 = status; |
|
switch (m_StatusV6) |
|
{ |
|
case eRouterStatusOK: |
|
SetReachable (false, true); // ipv6 |
|
break; |
|
case eRouterStatusFirewalled: |
|
SetUnreachable (false, true); // ipv6 |
|
break; |
|
default: |
|
; |
|
} |
|
} |
|
} |
|
|
|
void RouterContext::UpdatePort (int port) |
|
{ |
|
bool updated = false; |
|
for (auto& address : m_RouterInfo.GetAddresses ()) |
|
{ |
|
if (!address->IsNTCP2 () && address->port != port) |
|
{ |
|
address->port = port; |
|
updated = true; |
|
} |
|
} |
|
if (updated) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::PublishNTCP2Address (int port, bool publish, bool v4, bool v6, bool ygg) |
|
{ |
|
if (!m_NTCP2Keys) return; |
|
bool updated = false; |
|
for (auto& address : m_RouterInfo.GetAddresses ()) |
|
{ |
|
if (address->IsNTCP2 () && (address->port != port || address->published != publish)) |
|
{ |
|
bool isAddr = v4 && address->IsV4 (); |
|
if (!isAddr && (v6 || ygg)) |
|
{ |
|
if (i2p::util::net::IsYggdrasilAddress (address->host)) |
|
isAddr = ygg; |
|
else |
|
isAddr = v6 && address->IsV6 (); |
|
} |
|
if (isAddr) |
|
{ |
|
if (!port && !address->port) |
|
{ |
|
// select random port only if address's port is not set |
|
port = rand () % (30777 - 9111) + 9111; // I2P network ports range |
|
if (port == 9150) port = 9151; // Tor browser |
|
} |
|
if (port) address->port = port; |
|
address->published = publish; |
|
address->ntcp2->iv = m_NTCP2Keys->iv; |
|
updated = true; |
|
} |
|
} |
|
} |
|
if (updated) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::UpdateNTCP2Address (bool enable) |
|
{ |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
bool found = false, updated = false; |
|
for (auto it = addresses.begin (); it != addresses.end (); ++it) |
|
{ |
|
if ((*it)->IsNTCP2 ()) |
|
{ |
|
found = true; |
|
if (!enable) |
|
{ |
|
addresses.erase (it); |
|
updated= true; |
|
} |
|
break; |
|
} |
|
} |
|
if (enable && !found) |
|
{ |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv); |
|
updated = true; |
|
} |
|
if (updated) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::UpdateAddress (const boost::asio::ip::address& host) |
|
{ |
|
bool updated = false; |
|
for (auto& address : m_RouterInfo.GetAddresses ()) |
|
{ |
|
if (address->host != host && address->IsCompatible (host) && |
|
!i2p::util::net::IsYggdrasilAddress (address->host)) |
|
{ |
|
address->host = host; |
|
if (host.is_v6 () && address->transportStyle == i2p::data::RouterInfo::eTransportSSU) |
|
{ |
|
// update MTU |
|
auto mtu = i2p::util::net::GetMTU (host); |
|
if (mtu) |
|
{ |
|
LogPrint (eLogDebug, "Router: Our v6 MTU=", mtu); |
|
if (mtu > 1472) { // TODO: magic constant |
|
mtu = 1472; |
|
LogPrint(eLogWarning, "Router: MTU dropped to upper limit of 1472 bytes"); |
|
} |
|
if (address->ssu) address->ssu->mtu = mtu; |
|
} |
|
} |
|
updated = true; |
|
} |
|
} |
|
auto ts = i2p::util::GetSecondsSinceEpoch (); |
|
if (updated || ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
bool RouterContext::AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer) |
|
{ |
|
bool ret = m_RouterInfo.AddIntroducer (introducer); |
|
if (ret) |
|
UpdateRouterInfo (); |
|
return ret; |
|
} |
|
|
|
void RouterContext::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e) |
|
{ |
|
if (m_RouterInfo.RemoveIntroducer (e)) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::SetFloodfill (bool floodfill) |
|
{ |
|
m_IsFloodfill = floodfill; |
|
if (floodfill) |
|
m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () | i2p::data::RouterInfo::eFloodfill); |
|
else |
|
{ |
|
m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eFloodfill); |
|
// we don't publish number of routers and leaseset for non-floodfill |
|
m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS); |
|
m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS); |
|
} |
|
UpdateRouterInfo (); |
|
} |
|
|
|
std::string RouterContext::GetFamily () const |
|
{ |
|
return m_RouterInfo.GetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY); |
|
} |
|
|
|
void RouterContext::SetFamily (const std::string& family) |
|
{ |
|
std::string signature; |
|
if (family.length () > 0) |
|
signature = i2p::data::CreateFamilySignature (family, GetIdentHash ()); |
|
if (signature.length () > 0) |
|
{ |
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY, family); |
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG, signature); |
|
} |
|
else |
|
{ |
|
m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY); |
|
m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG); |
|
} |
|
} |
|
|
|
void RouterContext::SetBandwidth (char L) |
|
{ |
|
uint32_t limit = 0; |
|
enum { low, high, extra, unlim } type = high; |
|
/* detect parameters */ |
|
switch (L) |
|
{ |
|
case i2p::data::CAPS_FLAG_LOW_BANDWIDTH1 : limit = 12; type = low; break; |
|
case i2p::data::CAPS_FLAG_LOW_BANDWIDTH2 : limit = 48; type = low; break; |
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH1 : limit = 64; type = high; break; |
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH2 : limit = 128; type = high; break; |
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH3 : limit = 256; type = high; break; |
|
case i2p::data::CAPS_FLAG_EXTRA_BANDWIDTH1 : limit = 2048; type = extra; break; |
|
case i2p::data::CAPS_FLAG_EXTRA_BANDWIDTH2 : limit = 1000000; type = unlim; break; // 1Gbyte/s |
|
default: |
|
limit = 48; type = low; |
|
} |
|
/* update caps & flags in RI */ |
|
auto caps = m_RouterInfo.GetCaps (); |
|
caps &= ~i2p::data::RouterInfo::eHighBandwidth; |
|
caps &= ~i2p::data::RouterInfo::eExtraBandwidth; |
|
switch (type) |
|
{ |
|
case low : /* not set */; break; |
|
case extra : caps |= i2p::data::RouterInfo::eExtraBandwidth; break; // 'P' |
|
case unlim : caps |= i2p::data::RouterInfo::eExtraBandwidth; |
|
#if (__cplusplus >= 201703L) // C++ 17 or higher |
|
[[fallthrough]]; |
|
#endif |
|
// no break here, extra + high means 'X' |
|
case high : caps |= i2p::data::RouterInfo::eHighBandwidth; break; |
|
} |
|
m_RouterInfo.SetCaps (caps); |
|
UpdateRouterInfo (); |
|
m_BandwidthLimit = limit; |
|
} |
|
|
|
void RouterContext::SetBandwidth (int limit) |
|
{ |
|
if (limit > 2000) { SetBandwidth('X'); } |
|
else if (limit > 256) { SetBandwidth('P'); } |
|
else if (limit > 128) { SetBandwidth('O'); } |
|
else if (limit > 64) { SetBandwidth('N'); } |
|
else if (limit > 48) { SetBandwidth('M'); } |
|
else if (limit > 12) { SetBandwidth('L'); } |
|
else { SetBandwidth('K'); } |
|
m_BandwidthLimit = limit; // set precise limit |
|
} |
|
|
|
void RouterContext::SetShareRatio (int percents) |
|
{ |
|
if (percents < 0) percents = 0; |
|
if (percents > 100) percents = 100; |
|
m_ShareRatio = percents; |
|
} |
|
|
|
bool RouterContext::IsUnreachable () const |
|
{ |
|
return m_RouterInfo.GetCaps () & i2p::data::RouterInfo::eUnreachable; |
|
} |
|
|
|
void RouterContext::RemoveNTCPAddress (bool v4only) |
|
{ |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto it = addresses.begin (); it != addresses.end ();) |
|
{ |
|
if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP && !(*it)->IsNTCP2 () && |
|
(!v4only || (*it)->host.is_v4 ())) |
|
{ |
|
it = addresses.erase (it); |
|
if (v4only) break; // otherwise might be more than one address |
|
} |
|
else |
|
++it; |
|
} |
|
} |
|
|
|
void RouterContext::SetUnreachable (bool v4, bool v6) |
|
{ |
|
if (v4 || (v6 && !SupportsV4 ())) |
|
{ |
|
// set caps |
|
uint8_t caps = m_RouterInfo.GetCaps (); |
|
caps &= ~i2p::data::RouterInfo::eReachable; |
|
caps |= i2p::data::RouterInfo::eUnreachable; |
|
if (v6 || !SupportsV6 ()) |
|
caps &= ~i2p::data::RouterInfo::eFloodfill; // can't be floodfill |
|
m_RouterInfo.SetCaps (caps); |
|
} |
|
uint16_t port = 0; |
|
// delete previous introducers |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr : addresses) |
|
if (addr->ssu && ((v4 && addr->IsV4 ()) || (v6 && addr->IsV6 ()))) |
|
{ |
|
addr->published = false; |
|
addr->caps &= ~i2p::data::RouterInfo::eSSUIntroducer; // can't be introducer |
|
addr->ssu->introducers.clear (); |
|
port = addr->port; |
|
} |
|
// unpublish NTCP2 addreeses |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
if (ntcp2) |
|
PublishNTCP2Address (port, false, v4, v6, false); |
|
// update |
|
m_RouterInfo.UpdateSupportedTransports (); |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::SetReachable (bool v4, bool v6) |
|
{ |
|
if (v4 || (v6 && !SupportsV4 ())) |
|
{ |
|
// update caps |
|
uint8_t caps = m_RouterInfo.GetCaps (); |
|
caps &= ~i2p::data::RouterInfo::eUnreachable; |
|
caps |= i2p::data::RouterInfo::eReachable; |
|
if (m_IsFloodfill) |
|
caps |= i2p::data::RouterInfo::eFloodfill; |
|
m_RouterInfo.SetCaps (caps); |
|
} |
|
uint16_t port = 0; |
|
// delete previous introducers |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr : addresses) |
|
if (addr->ssu && ((v4 && addr->IsV4 ()) || (v6 && addr->IsV6 ()))) |
|
{ |
|
addr->published = true; |
|
addr->caps |= i2p::data::RouterInfo::eSSUIntroducer; |
|
addr->ssu->introducers.clear (); |
|
port = addr->port; |
|
} |
|
// publish NTCP2 |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
if (ntcp2) |
|
{ |
|
bool published; i2p::config::GetOption ("ntcp2.published", published); |
|
if (published) |
|
{ |
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port); |
|
if (!ntcp2Port) ntcp2Port = port; |
|
PublishNTCP2Address (ntcp2Port, true, v4, v6, false); |
|
} |
|
} |
|
// update |
|
m_RouterInfo.UpdateSupportedTransports (); |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::SetSupportsV6 (bool supportsV6) |
|
{ |
|
if (supportsV6) |
|
{ |
|
// insert v6 addresses if necessary |
|
bool foundSSU = false, foundNTCP2 = false; |
|
uint16_t port = 0; |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr: addresses) |
|
{ |
|
if (addr->IsV6 () && !i2p::util::net::IsYggdrasilAddress (addr->host)) |
|
{ |
|
if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU) |
|
foundSSU = true; |
|
else if (addr->transportStyle == i2p::data::RouterInfo::eTransportNTCP) |
|
foundNTCP2 = true; |
|
} |
|
port = addr->port; |
|
} |
|
if (!port) i2p::config::GetOption("port", port); |
|
// SSU |
|
if (!foundSSU) |
|
{ |
|
bool ssu; i2p::config::GetOption("ssu", ssu); |
|
if (ssu) |
|
{ |
|
std::string host = "::1"; // TODO: read host |
|
m_RouterInfo.AddSSUAddress (host.c_str (), port, nullptr); |
|
} |
|
} |
|
// NTCP2 |
|
if (!foundNTCP2) |
|
{ |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
bool ntcp2Published; i2p::config::GetOption("ntcp2.published", ntcp2Published); |
|
if (ntcp2) |
|
{ |
|
if (ntcp2Published) |
|
{ |
|
std::string ntcp2Host; |
|
if (!i2p::config::IsDefault ("ntcp2.addressv6")) |
|
i2p::config::GetOption ("ntcp2.addressv6", ntcp2Host); |
|
else |
|
ntcp2Host = "::1"; |
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port); |
|
if (!ntcp2Port) ntcp2Port = port; |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address::from_string (ntcp2Host), ntcp2Port); |
|
} |
|
else |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address(), 0, i2p::data::RouterInfo::eV6); |
|
} |
|
} |
|
m_RouterInfo.EnableV6 (); |
|
} |
|
else |
|
m_RouterInfo.DisableV6 (); |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::SetSupportsV4 (bool supportsV4) |
|
{ |
|
// check if updates |
|
if (supportsV4 && SupportsV4 ()) return; |
|
if (!supportsV4 && !SupportsV4 ()) return; |
|
// update |
|
if (supportsV4) |
|
{ |
|
bool foundSSU = false, foundNTCP2 = false; |
|
std::string host = "127.0.0.1"; |
|
uint16_t port = 0; |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr: addresses) |
|
{ |
|
if (addr->IsV4 ()) |
|
{ |
|
if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU) |
|
foundSSU = true; |
|
else if (addr->transportStyle == i2p::data::RouterInfo::eTransportNTCP) |
|
foundNTCP2 = true; |
|
} |
|
if (addr->port) port = addr->port; |
|
} |
|
if (!port) i2p::config::GetOption("port", port); |
|
// SSU |
|
if (!foundSSU) |
|
{ |
|
bool ssu; i2p::config::GetOption("ssu", ssu); |
|
if (ssu) |
|
m_RouterInfo.AddSSUAddress (host.c_str (), port, nullptr); |
|
} |
|
// NTCP2 |
|
if (!foundNTCP2) |
|
{ |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
if (ntcp2) |
|
{ |
|
bool ntcp2Published; i2p::config::GetOption("ntcp2.published", ntcp2Published); |
|
if (ntcp2Published) |
|
{ |
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port); |
|
if (!ntcp2Port) ntcp2Port = port; |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address::from_string (host), ntcp2Port); |
|
} |
|
else |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address(), 0, i2p::data::RouterInfo::eV4); |
|
} |
|
} |
|
m_RouterInfo.EnableV4 (); |
|
} |
|
else |
|
m_RouterInfo.DisableV4 (); |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::SetSupportsMesh (bool supportsmesh, const boost::asio::ip::address_v6& host) |
|
{ |
|
if (supportsmesh) |
|
{ |
|
m_RouterInfo.EnableMesh (); |
|
uint16_t port = 0; |
|
i2p::config::GetOption ("ntcp2.port", port); |
|
if (!port) i2p::config::GetOption("port", port); |
|
bool foundMesh = false; |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr: addresses) |
|
{ |
|
if (!port) port = addr->port; |
|
if (i2p::util::net::IsYggdrasilAddress (addr->host)) |
|
{ |
|
foundMesh = true; |
|
break; |
|
} |
|
} |
|
if (!foundMesh) |
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, host, port); |
|
} |
|
else |
|
m_RouterInfo.DisableMesh (); |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::UpdateNTCP2V6Address (const boost::asio::ip::address& host) |
|
{ |
|
bool isYgg = i2p::util::net::IsYggdrasilAddress (host); |
|
bool updated = false; |
|
auto& addresses = m_RouterInfo.GetAddresses (); |
|
for (auto& addr: addresses) |
|
{ |
|
if (addr->IsPublishedNTCP2 ()) |
|
{ |
|
bool isYgg1 = i2p::util::net::IsYggdrasilAddress (addr->host); |
|
if (addr->IsV6 () && ((isYgg && isYgg1) || (!isYgg && !isYgg1))) |
|
{ |
|
if (addr->host != host) |
|
{ |
|
addr->host = host; |
|
updated = true; |
|
} |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (updated) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
void RouterContext::UpdateStats () |
|
{ |
|
if (m_IsFloodfill) |
|
{ |
|
// update routers and leasesets |
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS, std::to_string(i2p::data::netdb.GetNumLeaseSets ())); |
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS, std::to_string(i2p::data::netdb.GetNumRouters ())); |
|
UpdateRouterInfo (); |
|
} |
|
} |
|
|
|
void RouterContext::UpdateTimestamp (uint64_t ts) |
|
{ |
|
if (ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL) |
|
UpdateRouterInfo (); |
|
} |
|
|
|
bool RouterContext::Load () |
|
{ |
|
{ |
|
std::ifstream fk (i2p::fs::DataDirPath (ROUTER_KEYS), std::ifstream::in | std::ifstream::binary); |
|
if (!fk.is_open ()) return false; |
|
fk.seekg (0, std::ios::end); |
|
size_t len = fk.tellg(); |
|
fk.seekg (0, std::ios::beg); |
|
|
|
if (len == sizeof (i2p::data::Keys)) // old keys file format |
|
{ |
|
i2p::data::Keys keys; |
|
fk.read ((char *)&keys, sizeof (keys)); |
|
m_Keys = keys; |
|
} |
|
else // new keys file format |
|
{ |
|
uint8_t * buf = new uint8_t[len]; |
|
fk.read ((char *)buf, len); |
|
m_Keys.FromBuffer (buf, len); |
|
delete[] buf; |
|
} |
|
} |
|
std::shared_ptr<const i2p::data::IdentityEx> oldIdentity; |
|
if (m_Keys.GetPublic ()->GetSigningKeyType () == i2p::data::SIGNING_KEY_TYPE_DSA_SHA1 || |
|
m_Keys.GetPublic ()->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ELGAMAL) |
|
{ |
|
// update keys |
|
LogPrint (eLogInfo, "Router: router keys are obsolete. Creating new"); |
|
oldIdentity = m_Keys.GetPublic (); |
|
m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519, |
|
i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD); |
|
SaveKeys (); |
|
} |
|
// read NTCP2 keys if available |
|
std::ifstream n2k (i2p::fs::DataDirPath (NTCP2_KEYS), std::ifstream::in | std::ifstream::binary); |
|
if (n2k) |
|
{ |
|
n2k.seekg (0, std::ios::end); |
|
size_t len = n2k.tellg(); |
|
n2k.seekg (0, std::ios::beg); |
|
if (len == sizeof (NTCP2PrivateKeys)) |
|
{ |
|
m_NTCP2Keys.reset (new NTCP2PrivateKeys ()); |
|
n2k.read ((char *)m_NTCP2Keys.get (), sizeof (NTCP2PrivateKeys)); |
|
} |
|
n2k.close (); |
|
} |
|
// read RouterInfo |
|
m_RouterInfo.SetRouterIdentity (oldIdentity ? oldIdentity : GetIdentity ()); |
|
i2p::data::RouterInfo routerInfo(i2p::fs::DataDirPath (ROUTER_INFO)); |
|
if (!routerInfo.IsUnreachable ()) // router.info looks good |
|
{ |
|
m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); |
|
if (oldIdentity) |
|
m_RouterInfo.SetRouterIdentity (GetIdentity ()); // from new keys |
|
m_RouterInfo.SetProperty ("router.version", I2P_VERSION); |
|
m_RouterInfo.DeleteProperty ("coreVersion"); // TODO: remove later |
|
} |
|
else |
|
{ |
|
LogPrint (eLogError, ROUTER_INFO, " is malformed. Creating new"); |
|
NewRouterInfo (); |
|
} |
|
|
|
if (IsUnreachable ()) |
|
SetReachable (true, true); // we assume reachable until we discover firewall through peer tests |
|
|
|
// read NTCP2 |
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg); |
|
if (ntcp2 || ygg) |
|
{ |
|
if (!m_NTCP2Keys) NewNTCP2Keys (); |
|
UpdateNTCP2Address (true); // enable NTCP2 |
|
} |
|
else |
|
UpdateNTCP2Address (false); // disable NTCP2 |
|
|
|
return true; |
|
} |
|
|
|
void RouterContext::SaveKeys () |
|
{ |
|
// save in the same format as .dat files |
|
std::ofstream fk (i2p::fs::DataDirPath (ROUTER_KEYS), std::ofstream::binary | std::ofstream::out); |
|
size_t len = m_Keys.GetFullLen (); |
|
uint8_t * buf = new uint8_t[len]; |
|
m_Keys.ToBuffer (buf, len); |
|
fk.write ((char *)buf, len); |
|
delete[] buf; |
|
} |
|
|
|
std::shared_ptr<i2p::tunnel::TunnelPool> RouterContext::GetTunnelPool () const |
|
{ |
|
return i2p::tunnel::tunnels.GetExploratoryPool (); |
|
} |
|
|
|
void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len) |
|
{ |
|
i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len))); |
|
} |
|
|
|
bool RouterContext::HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len) |
|
{ |
|
auto msg = CreateI2NPMessage (typeID, payload, len); |
|
if (!msg) return false; |
|
i2p::HandleI2NPMessage (msg); |
|
return true; |
|
} |
|
|
|
|
|
void RouterContext::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg) |
|
{ |
|
std::unique_lock<std::mutex> l(m_GarlicMutex); |
|
if (IsECIES ()) |
|
{ |
|
uint8_t * buf = msg->GetPayload (); |
|
uint32_t len = bufbe32toh (buf); |
|
if (len > msg->GetLength ()) |
|
{ |
|
LogPrint (eLogWarning, "Router: garlic message length ", len, " exceeds I2NP message length ", msg->GetLength ()); |
|
return; |
|
} |
|
buf += 4; |
|
if (m_ECIESSession) |
|
m_ECIESSession->HandleNextMessage (buf, len); |
|
else |
|
LogPrint (eLogError, "Router: Session is not set for ECIES router"); |
|
} |
|
else |
|
i2p::garlic::GarlicDestination::ProcessGarlicMessage (msg); |
|
} |
|
|
|
void RouterContext::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg) |
|
{ |
|
if (i2p::data::netdb.GetPublishReplyToken () == bufbe32toh (msg->GetPayload () + DELIVERY_STATUS_MSGID_OFFSET)) |
|
i2p::data::netdb.PostI2NPMsg (msg); |
|
else |
|
{ |
|
std::unique_lock<std::mutex> l(m_GarlicMutex); |
|
i2p::garlic::GarlicDestination::ProcessDeliveryStatusMessage (msg); |
|
} |
|
} |
|
|
|
void RouterContext::CleanupDestination () |
|
{ |
|
std::unique_lock<std::mutex> l(m_GarlicMutex); |
|
i2p::garlic::GarlicDestination::CleanupExpiredTags (); |
|
} |
|
|
|
uint32_t RouterContext::GetUptime () const |
|
{ |
|
return std::chrono::duration_cast<std::chrono::seconds> (std::chrono::steady_clock::now() - m_StartupTime).count (); |
|
} |
|
|
|
bool RouterContext::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx, i2p::data::CryptoKeyType preferredCrypto) const |
|
{ |
|
return m_Decryptor ? m_Decryptor->Decrypt (encrypted, data, ctx, true) : false; |
|
} |
|
|
|
bool RouterContext::DecryptTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data) |
|
{ |
|
if (IsECIES ()) |
|
return DecryptECIESTunnelBuildRecord (encrypted, data, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE); |
|
else |
|
{ |
|
if (!m_TunnelDecryptor) return false; |
|
BN_CTX * ctx = BN_CTX_new (); |
|
bool success = m_TunnelDecryptor->Decrypt (encrypted, data, ctx, false); |
|
BN_CTX_free (ctx); |
|
return success; |
|
} |
|
} |
|
|
|
bool RouterContext::DecryptECIESTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data, size_t clearTextSize) |
|
{ |
|
// m_InitialNoiseState is h = SHA256(h || hepk) |
|
m_CurrentNoiseState = m_InitialNoiseState; |
|
m_CurrentNoiseState.MixHash (encrypted, 32); // h = SHA256(h || sepk) |
|
uint8_t sharedSecret[32]; |
|
if (!m_TunnelDecryptor->Decrypt (encrypted, sharedSecret, nullptr, false)) |
|
{ |
|
LogPrint (eLogWarning, "Router: Incorrect ephemeral public key"); |
|
return false; |
|
} |
|
m_CurrentNoiseState.MixKey (sharedSecret); |
|
encrypted += 32; |
|
uint8_t nonce[12]; |
|
memset (nonce, 0, 12); |
|
if (!i2p::crypto::AEADChaCha20Poly1305 (encrypted, clearTextSize, m_CurrentNoiseState.m_H, 32, |
|
m_CurrentNoiseState.m_CK + 32, nonce, data, clearTextSize, false)) // decrypt |
|
{ |
|
LogPrint (eLogWarning, "Router: Tunnel record AEAD decryption failed"); |
|
return false; |
|
} |
|
m_CurrentNoiseState.MixHash (encrypted, clearTextSize + 16); // h = SHA256(h || ciphertext) |
|
return true; |
|
} |
|
|
|
bool RouterContext::DecryptTunnelShortRequestRecord (const uint8_t * encrypted, uint8_t * data) |
|
{ |
|
if (IsECIES ()) |
|
return DecryptECIESTunnelBuildRecord (encrypted, data, SHORT_REQUEST_RECORD_CLEAR_TEXT_SIZE); |
|
else |
|
{ |
|
LogPrint (eLogWarning, "Router: Can't decrypt short request record on non-ECIES router"); |
|
return false; |
|
} |
|
} |
|
|
|
i2p::crypto::X25519Keys& RouterContext::GetStaticKeys () |
|
{ |
|
if (!m_StaticKeys) |
|
{ |
|
if (!m_NTCP2Keys) NewNTCP2Keys (); |
|
auto x = new i2p::crypto::X25519Keys (m_NTCP2Keys->staticPrivateKey, m_NTCP2Keys->staticPublicKey); |
|
if (!m_StaticKeys) |
|
m_StaticKeys.reset (x); |
|
else |
|
delete x; |
|
} |
|
return *m_StaticKeys; |
|
} |
|
}
|
|
|