Merge pull request #1258 from PurpleI2P/openssl

long I2NP messages

contrib/rpm/i2pd-git.spec

@@ -1,7 +1,7 @@
 %define git_hash %(git rev-parse HEAD | cut -c -7)
 
 Name:           i2pd-git
-Version:        2.20.0
+Version:        2.21.0
 Release:        git%{git_hash}%{?dist}
 Summary:        I2P router written in C++
 Conflicts:      i2pd

contrib/rpm/i2pd.spec

@@ -1,5 +1,5 @@
 Name:           i2pd
-Version:        2.20.0
+Version:        2.21.0
 Release:        1%{?dist}
 Summary:        I2P router written in C++
 Conflicts:      i2pd-git

debian/control

@@ -1,7 +1,7 @@
 Source: i2pd
 Section: net
 Priority: optional
-Maintainer: R4SAS <r4sas@i2pmail.org>
+Maintainer: r4sas <r4sas@i2pmail.org>
 Build-Depends: debhelper (>= 9), dpkg-dev (>= 1.17.2~), gcc (>= 4.7) | clang (>= 3.3), libboost-system-dev (>= 1.46), libboost-date-time-dev (>= 1.46), libboost-filesystem-dev (>= 1.46), libboost-program-options-dev (>= 1.46), libminiupnpc-dev, libssl-dev, zlib1g-dev
 Standards-Version: 3.9.6
 Homepage: http://i2pd.website/

debian/patches/01-tune-build-opts.patch

@@ -13,5 +13,5 @@ index bdadfe0..2f71eec 100644
  USE_STATIC	:= no
  USE_MESHNET	:= no
  USE_UPNP	:= no
+ DEBUG		:= yes
  
- ifeq ($(WEBSOCKETS),1)

debian/patches/fix-#1210

@@ -0,0 +1,25 @@
+Description: fix #1210
+ Disables two options, which not presented in old systemd versions
+Author: r4sas <r4sas@i2pmail.org>
+
+Bug: https://github.com/PurpleI2P/i2pd/issues/1210
+Reviewed-By: r4sas <r4sas@i2pmail.org>
+Last-Update: 2018-08-25
+
+--- i2pd-2.20.0.orig/contrib/i2pd.service
++++ i2pd-2.20.0/contrib/i2pd.service
+@@ -6,10 +6,10 @@ After=network.target
+ [Service]
+ User=i2pd
+ Group=i2pd
+-RuntimeDirectory=i2pd
+-RuntimeDirectoryMode=0700
+-LogsDirectory=i2pd
+-LogsDirectoryMode=0700
++#RuntimeDirectory=i2pd
++#RuntimeDirectoryMode=0700
++#LogsDirectory=i2pd
++#LogsDirectoryMode=0700
+ Type=forking
+ ExecStart=/usr/sbin/i2pd --conf=/etc/i2pd/i2pd.conf --tunconf=/etc/i2pd/tunnels.conf --pidfile=/var/run/i2pd/i2pd.pid --logfile=/var/log/i2pd/i2pd.log --daemon --service
+ ExecReload=/bin/kill -HUP $MAINPID

debian/patches/series

@@ -1 +1,2 @@
 01-tune-build-opts.patch
+fix-#1210

libi2pd/I2NPProtocol.cpp

@@ -36,7 +36,7 @@ namespace i2p
 
 	std::shared_ptr<I2NPMessage> NewI2NPMessage (size_t len)
 	{
-		return (len < I2NP_MAX_SHORT_MESSAGE_SIZE/2) ? NewI2NPShortMessage () : NewI2NPMessage ();
+		return (len < I2NP_MAX_SHORT_MESSAGE_SIZE - I2NP_HEADER_SIZE - 2) ? NewI2NPShortMessage () : NewI2NPMessage ();
 	}
 
 	void I2NPMessage::FillI2NPMessageHeader (I2NPMessageType msgType, uint32_t replyMsgID)

libi2pd/I2NPProtocol.h

@@ -106,7 +106,7 @@ namespace tunnel
 	class TunnelPool;
 }
 
-	const size_t I2NP_MAX_MESSAGE_SIZE = 32768;
+	const size_t I2NP_MAX_MESSAGE_SIZE = 62708;
 	const size_t I2NP_MAX_SHORT_MESSAGE_SIZE = 4096;
 	const unsigned int I2NP_MESSAGE_EXPIRATION_TIMEOUT = 8000; // in milliseconds (as initial RTT)
 	const unsigned int I2NP_MESSAGE_CLOCK_SKEW = 60*1000; // 1 minute in milliseconds

libi2pd/NTCP2.cpp

@@ -900,6 +900,11 @@ namespace transport
 				case eNTCP2BlkI2NPMessage:
 				{
 					LogPrint (eLogDebug, "NTCP2: I2NP");
+					if (size > I2NP_MAX_MESSAGE_SIZE)
+					{
+						LogPrint (eLogError, "NTCP2: I2NP block is too long ", size);
+						break;
+					}
 					auto nextMsg = NewI2NPMessage (size);
 					nextMsg->len = nextMsg->offset + size + 7; // 7 more bytes for full I2NP header
 					memcpy (nextMsg->GetNTCP2Header (), frame + offset, size);
@@ -993,6 +998,11 @@ namespace transport
 					s += len;
 					m_SendQueue.pop_front ();
 				}
+				else if (len + 3 > NTCP2_UNENCRYPTED_FRAME_MAX_SIZE)
+				{
+					LogPrint (eLogError, "NTCP2: I2NP message of size ", len, " can't be sent. Dropped");
+					m_SendQueue.pop_front ();
+				}
 				else
 					break;
 			}
@@ -1122,7 +1132,7 @@ namespace transport
 							auto conn = std::make_shared<NTCP2Session> (*this);
 							m_NTCP2V6Acceptor->async_accept(conn->GetSocket (), std::bind (&NTCP2Server::HandleAcceptV6, this, conn, std::placeholders::_1));
 						} catch ( std::exception & ex ) {
-							LogPrint(eLogError, "NTCP: failed to bind to ip6 port ", address->port);
+							LogPrint(eLogError, "NTCP2: failed to bind to ip6 port ", address->port);
 							continue;
 						}
 					}

libi2pd/RouterContext.cpp

@@ -173,6 +173,7 @@ namespace i2p
 			if (address->IsNTCP2 () && (address->port != port || address->ntcp2->isPublished != publish))
 			{
 				address->port = port;
+				address->cost = publish ? 3 : 14;
 				address->ntcp2->isPublished = publish;
 				address->ntcp2->iv = m_NTCP2Keys->iv;
 				updated = true;

libi2pd/RouterInfo.cpp

@@ -700,7 +700,7 @@ namespace data
 		addr->host = host;
 		addr->port = port;
 		addr->transportStyle = eTransportNTCP;
-		addr->cost = 3;
+		addr->cost = port ? 3 : 14; // override from RouterContext::PublishNTCP2Address
 		addr->date = 0;
 		addr->ntcp2.reset (new NTCP2Ext ());
 		addr->ntcp2->isNTCP2Only = true; // NTCP2 only address

libi2pd/SSUData.cpp

@@ -320,7 +320,7 @@ namespace transport
 		uint8_t * msgBuf = msg->GetSSUHeader ();
 
 		uint32_t fragmentNum = 0;
-		while (len > 0)
+		while (len > 0 && fragmentNum <= 127)
 		{
 			Fragment * fragment = new Fragment;
 			fragment->fragmentNum = fragmentNum;
@@ -332,7 +332,7 @@ namespace transport
 			payload++;
 			htobe32buf (payload, msgID);
 			payload += 4;
-			bool isLast = (len <= payloadSize);
+			bool isLast = (len <= payloadSize) || fragmentNum == 127; // 127 fragments max
 			size_t size = isLast ? len : payloadSize;
 			uint32_t fragmentInfo = (fragmentNum << 17);
 			if (isLast)

libi2pd/SSUSession.cpp

@@ -929,7 +929,13 @@ namespace transport
 		if (m_State == eSessionStateEstablished)
 		{
 			for (const auto& it: msgs)
-				if (it) m_Data.Send (it);
+				if (it)
+				{
+					if (it->GetLength () <= SSU_MAX_I2NP_MESSAGE_SIZE) 
+						m_Data.Send (it);
+					else
+						LogPrint (eLogError, "SSU: I2NP message of size ", it->GetLength (), " can't be sent. Dropped");
+				}
 		}
 	}
 

libi2pd/SSUSession.h

@@ -28,6 +28,7 @@ namespace transport
 	const int SSU_CONNECT_TIMEOUT = 5; // 5 seconds
 	const int SSU_TERMINATION_TIMEOUT = 330; // 5.5 minutes
 	const int SSU_CLOCK_SKEW = 60; // in seconds
+	const size_t SSU_MAX_I2NP_MESSAGE_SIZE = 32768;	
 
 	// payload types (4 bits)
 	const uint8_t PAYLOAD_TYPE_SESSION_REQUEST = 0;

libi2pd_client/SAM.cpp

@@ -1027,11 +1027,29 @@ namespace client
 			{
 				auto it = params->find (SAM_PARAM_SIGNATURE_TYPE);
 				if (it != params->end ())
+				{	
 					// TODO: extract string values
-					signatureType = std::stoi(it->second);
+					try
+					{	
+						signatureType = std::stoi(it->second);
+					}
+					catch (const std::exception& ex) 
+					{
+						LogPrint (eLogWarning, "SAM: ", SAM_PARAM_SIGNATURE_TYPE, "error: ", ex.what ());	
+					}		
+				}	
 				it = params->find (SAM_PARAM_CRYPTO_TYPE);
 				if (it != params->end ())
-					cryptoType = std::stoi(it->second);
+				{	
+					try
+					{	
+						cryptoType = std::stoi(it->second);
+					}
+					catch (const std::exception& ex) 
+					{
+						LogPrint (eLogWarning, "SAM: ", SAM_PARAM_CRYPTO_TYPE, "error: ", ex.what ());	
+					}	
+				}	
 			}
 			localDestination = i2p::client::context.CreateNewLocalDestination (true, signatureType, cryptoType, params);
 		}