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check for duplicated routers in NTCP2. Insert router into netdb right a way

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orignal 2024-09-05 19:24:23 -04:00
parent 9a77c0a4b1
commit fde301deaf
3 changed files with 32 additions and 12 deletions
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1
libi2pd/I2NPProtocol.h
View File

@ -107,7 +107,6 @@ namespace i2p
enum I2NPMessageType
{
eI2NPDummyMsg = 0,
eI2NPDatabaseStore = 1,
eI2NPDatabaseLookup = 2,
eI2NPDatabaseSearchReply = 3,

39
libi2pd/NTCP2.cpp
View File

@ -724,8 +724,24 @@ namespace transport
SendTerminationAndTerminate (eNTCP2Message3Error);
return;
}
auto addr = m_RemoteEndpoint.address ().is_v4 () ? ri.GetNTCP2V4Address () :
(i2p::util::net::IsYggdrasilAddress (m_RemoteEndpoint.address ()) ? ri.GetYggdrasilAddress () : ri.GetNTCP2V6Address ());
// update RouterInfo in netdb
auto ri1 = i2p::data::netdb.AddRouterInfo (ri.GetBuffer (), ri.GetBufferLen ()); // ri1 points to one from netdb now
if (!ri1)
{
LogPrint (eLogError, "NTCP2: Couldn't update RouterInfo from SessionConfirmed in netdb");
return;
}
std::shared_ptr<i2p::data::RouterProfile> profile; // not null if older
if (ri.GetTimestamp () + i2p::data::NETDB_EXPIRATION_TIMEOUT_THRESHOLD*1000LL < ri1->GetTimestamp ())
{
// received RouterInfo is older than one in netdb
profile = i2p::data::GetRouterProfile (ri1->GetIdentHash ()); // retrieve profile
if (profile && profile->IsDuplicated ())
return;
}
auto addr = m_RemoteEndpoint.address ().is_v4 () ? ri1->GetNTCP2V4Address () :
(i2p::util::net::IsYggdrasilAddress (m_RemoteEndpoint.address ()) ? ri1->GetYggdrasilAddress () : ri1->GetNTCP2V6Address ());
if (!addr || memcmp (m_Establisher->m_RemoteStaticKey, addr->s, 32))
{
LogPrint (eLogError, "NTCP2: Wrong static key in SessionConfirmed");
@ -737,16 +753,17 @@ namespace transport
memcmp (m_RemoteEndpoint.address ().to_v6 ().to_bytes ().data () + 1, addr->host.to_v6 ().to_bytes ().data () + 1, 7) : // from the same yggdrasil subnet
memcmp (m_RemoteEndpoint.address ().to_v6 ().to_bytes ().data (), addr->host.to_v6 ().to_bytes ().data (), 8)))) // temporary address
{
LogPrint (eLogError, "NTCP2: Host mismatch between published address ", addr->host, " and actual endpoint ", m_RemoteEndpoint.address ());
if (profile) // older router?
profile->Duplicated (); // mark router as duplicated in profile
else
LogPrint (eLogError, "NTCP2: Host mismatch between published address ", addr->host, " and actual endpoint ", m_RemoteEndpoint.address ());
Terminate ();
return;
}
i2p::data::netdb.PostI2NPMsg (CreateI2NPMessage (eI2NPDummyMsg, buf.data () + 3, size)); // TODO: should insert ri and not parse it twice
// TODO: process options
// ready to communicate
auto existing = i2p::data::netdb.FindRouter (ri.GetRouterIdentity ()->GetIdentHash ()); // check if exists already
SetRemoteIdentity (existing ? existing->GetRouterIdentity () : ri.GetRouterIdentity ());
SetRemoteIdentity (ri1->GetRouterIdentity ());
if (m_Server.AddNTCP2Session (shared_from_this (), true))
{
Established ();
@ -939,7 +956,15 @@ namespace transport
case eNTCP2BlkRouterInfo:
{
LogPrint (eLogDebug, "NTCP2: RouterInfo flag=", (int)frame[offset]);
i2p::data::netdb.PostI2NPMsg (CreateI2NPMessage (eI2NPDummyMsg, frame + offset, size));
i2p::data::RouterInfo ri (frame + offset + 1, size - 1);
auto newRi = i2p::data::netdb.AddRouterInfo (ri.GetBuffer (), ri.GetBufferLen ());
if (newRi)
{
auto remoteIdentity = GetRemoteIdentity ();
if (remoteIdentity && remoteIdentity->GetIdentHash () == newRi->GetIdentHash ())
// peer's RouterInfo update
SetRemoteIdentity (newRi->GetIdentity ());
}
break;
}
case eNTCP2BlkI2NPMessage:

4
libi2pd/NetDb.cpp
View File

@ -141,10 +141,6 @@ namespace data
case eI2NPDatabaseLookup:
HandleDatabaseLookupMsg (msg);
break;
case eI2NPDummyMsg:
// plain RouterInfo from NTCP2 with flags for now
HandleNTCP2RouterInfoMsg (msg);
break;
default: // WTF?
LogPrint (eLogError, "NetDb: Unexpected message type ", (int) msg->GetTypeID ());
//i2p::HandleI2NPMessage (msg);