From f43e86099826e447d763f21366e19ad39e58a1eb Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 5 Aug 2022 21:23:23 -0400
Subject: [PATCH] cleanup introducers if router is not longer firewalled

---
 libi2pd/RouterContext.cpp | 15 +++++++++++++++
 libi2pd/RouterContext.h   |  1 +
 libi2pd/SSU2.cpp          |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/libi2pd/RouterContext.cpp b/libi2pd/RouterContext.cpp
index 2095a465..0a7b8342 100644
--- a/libi2pd/RouterContext.cpp
+++ b/libi2pd/RouterContext.cpp
@@ -481,6 +481,21 @@ namespace i2p
 			UpdateRouterInfo ();
 	}
 
+	void RouterContext::ClearSSU2Introducers (bool v4)
+	{
+		bool updated = false;
+		auto& addresses = m_RouterInfo.GetAddresses ();
+		for (auto& addr : addresses)
+			if (addr->IsSSU2 () && ((v4 && addr->IsV4 ()) || (!v4 && addr->IsV6 ())) &&
+			    addr->ssu && !addr->ssu->introducers.empty ())
+			{
+				addr->ssu->introducers.clear ();
+				updated = true;
+			}
+		if (updated)
+			UpdateRouterInfo ();
+	}	
+		
 	void RouterContext::SetFloodfill (bool floodfill)
 	{
 		m_IsFloodfill = floodfill;
diff --git a/libi2pd/RouterContext.h b/libi2pd/RouterContext.h
index 9e02b5d5..0c1acc7b 100644
--- a/libi2pd/RouterContext.h
+++ b/libi2pd/RouterContext.h
@@ -127,6 +127,7 @@ namespace garlic
 			void RemoveIntroducer (const boost::asio::ip::udp::endpoint& e);
 			bool AddSSU2Introducer (const i2p::data::RouterInfo::Introducer& introducer, bool v4);
 			void RemoveSSU2Introducer (const i2p::data::IdentHash& h, bool v4);
+			void ClearSSU2Introducers (bool v4);
 			bool IsUnreachable () const;
 			void SetUnreachable (bool v4, bool v6);
 			void SetUnreachableSSU2 (bool v4, bool v6);
diff --git a/libi2pd/SSU2.cpp b/libi2pd/SSU2.cpp
index 680cde63..ef076447 100644
--- a/libi2pd/SSU2.cpp
+++ b/libi2pd/SSU2.cpp
@@ -981,6 +981,7 @@ namespace transport
 				if (i2p::context.GetStatus () != eRouterStatusFirewalled)
 				{
 					// we don't need introducers
+					i2p::context.ClearSSU2Introducers (true);
 					m_Introducers.clear ();
 					return;
 				}
@@ -1003,6 +1004,7 @@ namespace transport
 				if (i2p::context.GetStatusV6 () != eRouterStatusFirewalled)
 				{
 					// we don't need introducers
+					i2p::context.ClearSSU2Introducers (false);
 					m_IntroducersV6.clear ();
 					return;
 				}