From 7a976dd5f27fb2bed9b903020d96bd5e61ecc14b Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 31 Oct 2014 18:27:51 -0400
Subject: [PATCH] specify actual mtu in our RI for i2pv6

---
 RouterContext.cpp | 8 +++++++-
 util.cpp          | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/RouterContext.cpp b/RouterContext.cpp
index 9e17af0e..b8b6baf6 100644
--- a/RouterContext.cpp
+++ b/RouterContext.cpp
@@ -162,7 +162,13 @@ namespace i2p
 		{
 			// create new address
 			m_RouterInfo.AddNTCPAddress (host.to_string ().c_str (), port);
-			m_RouterInfo.AddSSUAddress (host.to_string ().c_str (), port, GetIdentHash (), 1472); // TODO
+			auto mtu = i2p::util::net::GetMTU (host);
+			if (mtu)
+			{	
+				LogPrint ("Our v6 MTU=", mtu);
+				if (mtu > 1472) mtu = 1472; 
+			}	
+			m_RouterInfo.AddSSUAddress (host.to_string ().c_str (), port, GetIdentHash (), mtu ? mtu : 1472); // TODO
 			updated = true;
 		}
 		if (updated)
diff --git a/util.cpp b/util.cpp
index befffa33..f0689833 100644
--- a/util.cpp
+++ b/util.cpp
@@ -411,6 +411,7 @@ namespace net
 		// loook for interface matching local address	
 		for (ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) 
 		{
+			if (!ifa->ifa_addr) continue;
         	family = ifa->ifa_addr->sa_family;
 			if (family == AF_INET && localAddress.is_v4 ())
 			{