From fc50b24809fc8f6f3c3ba1e766882c7b0042103e Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Mon, 8 Sep 2014 16:43:20 -0400
Subject: [PATCH] unreachable mode

---
 Daemon.cpp        |  3 +++
 README.md         |  3 ++-
 RouterContext.cpp | 23 +++++++++++++++++++++--
 RouterContext.h   |  5 ++++-
 SSU.cpp           |  2 ++
 5 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/Daemon.cpp b/Daemon.cpp
index dcd34990..51e8f938 100644
--- a/Daemon.cpp
+++ b/Daemon.cpp
@@ -65,6 +65,9 @@ namespace i2p
 			i2p::context.OverrideNTCPAddress(i2p::util::config::GetCharArg("-host", "127.0.0.1"),
 				i2p::util::config::GetArg("-port", 17007));
 
+			if (i2p::util::config::GetArg("-unreachable", 0))
+				i2p::context.SetUnreachable ();
+
 			LogPrint("CMD parameters:");
 			for (int i = 0; i < argc; ++i)
 				LogPrint(i, "  ", argv[i]);
diff --git a/README.md b/README.md
index be42a06d..d4af6a6c 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,8 @@ Options
 * --port=               - The port to listen on
 * --httpport=           - The http port to listen on
 * --log=                - Enable or disable logging to file. 1 for yes, 0 for no.
-* --daemon=             - Eanble or disable daemon mode. 1 for yes, 0 for no.
+* --daemon=             - Enable or disable daemon mode. 1 for yes, 0 for no.
+* --unreachable=        - 1 if router is declared as unreachable and works through introducers.
 * --httpproxyport=      - The port to listen on (HTTP Proxy)
 * --socksproxyport=     - The port to listen on (SOCKS Proxy)
 * --ircport=      		- The local port of IRC tunnel to listen on. 6668 by default
diff --git a/RouterContext.cpp b/RouterContext.cpp
index a4f99ba7..8bf8cde5 100644
--- a/RouterContext.cpp
+++ b/RouterContext.cpp
@@ -12,7 +12,7 @@ namespace i2p
 	RouterContext context;
 
 	RouterContext::RouterContext ():
-		m_LastUpdateTime (0)
+		m_LastUpdateTime (0), m_IsUnreachable (false)
 	{
 	}
 
@@ -100,7 +100,26 @@ namespace i2p
 		if (m_RouterInfo.RemoveIntroducer (e))
 			UpdateRouterInfo ();
 	}	
-		
+	
+	void RouterContext::SetUnreachable ()
+	{
+		m_IsUnreachable = true;	
+		// set caps
+		m_RouterInfo.SetCaps (i2p::data::RouterInfo::eUnreachable | i2p::data::RouterInfo::eSSUTesting); // LU, B
+		// remove NTCP address
+		auto& addresses = m_RouterInfo.GetAddresses ();
+		for (size_t i = 0; i < addresses.size (); i++)
+		{
+			if (addresses[i].transportStyle == i2p::data::RouterInfo::eTransportNTCP)
+			{
+				addresses.erase (addresses.begin () + i);
+				break;
+			}
+		}	
+		// update
+		UpdateRouterInfo ();
+	}
+	
 	bool RouterContext::Load ()
 	{
 		std::ifstream fk (i2p::util::filesystem::GetFullPath (ROUTER_KEYS).c_str (), std::ifstream::binary | std::ofstream::in);
diff --git a/RouterContext.h b/RouterContext.h
index 27c289d8..d8a387f8 100644
--- a/RouterContext.h
+++ b/RouterContext.h
@@ -30,7 +30,9 @@ namespace i2p
 			void UpdateAddress (const char * host);	// called from SSU
 			void AddIntroducer (const i2p::data::RouterInfo& routerInfo, uint32_t tag);
 			void RemoveIntroducer (const boost::asio::ip::udp::endpoint& e);
-			
+			bool IsUnreachable () const { return m_IsUnreachable; };
+			void SetUnreachable ();				
+
 			// implements LocalDestination
 			const i2p::data::PrivateKeys& GetPrivateKeys () const { return m_Keys; };
 			const uint8_t * GetEncryptionPrivateKey () const { return m_Keys.GetPrivateKey (); };
@@ -51,6 +53,7 @@ namespace i2p
 			i2p::data::PrivateKeys m_Keys; 
 			CryptoPP::AutoSeededRandomPool m_Rnd;
 			uint64_t m_LastUpdateTime;
+			bool m_IsUnreachable;
 	};
 
 	extern RouterContext context;
diff --git a/SSU.cpp b/SSU.cpp
index a30b116e..8f9c1c50 100644
--- a/SSU.cpp
+++ b/SSU.cpp
@@ -905,6 +905,8 @@ namespace ssu
 		m_IsRunning = true;
 		m_Thread = new std::thread (std::bind (&SSUServer::Run, this));
 		m_Service.post (boost::bind (&SSUServer::Receive, this));  
+		if (i2p::context.IsUnreachable ())
+			ScheduleIntroducersUpdateTimer ();
 	}
 
 	void SSUServer::Stop ()