fix ipv6 fallback address

libi2pd/RouterContext.cpp

@@ -51,13 +51,13 @@ namespace i2p
 			port = rand () % (30777 - 9111) + 9111; // I2P network ports range
 			if (port == 9150) port = 9151; // Tor browser
 		}
-		bool ipv4; i2p::config::GetOption("ipv4", ipv4);
+		bool ipv4;           i2p::config::GetOption("ipv4", ipv4);
-		bool ipv6; i2p::config::GetOption("ipv6", ipv6);
+		bool ipv6;           i2p::config::GetOption("ipv6", ipv6);
-		bool ssu;    i2p::config::GetOption("ssu", ssu);
+		bool ssu;            i2p::config::GetOption("ssu", ssu);
-		bool ntcp;   i2p::config::GetOption("ntcp", ntcp);
+		bool ntcp;           i2p::config::GetOption("ntcp", ntcp);
-		bool ntcp2;  i2p::config::GetOption("ntcp2.enabled", ntcp2);
+		bool ntcp2;          i2p::config::GetOption("ntcp2.enabled", ntcp2);
-		bool nat;  i2p::config::GetOption("nat", nat);	
+		bool nat;            i2p::config::GetOption("nat", nat);
-		std::string ifname; i2p::config::GetOption("ifname", ifname);
+		std::string ifname;  i2p::config::GetOption("ifname", ifname);
 		std::string ifname4; i2p::config::GetOption("ifname4", ifname4);
 		std::string ifname6; i2p::config::GetOption("ifname6", ifname6);
 		if (ipv4)
@@ -79,7 +79,7 @@ namespace i2p
 		}
 		if (ipv6)
 		{
-			std::string host = "::";
+			std::string host = "::1";
 			if (!i2p::config::IsDefault("host") && !ipv4) // override if v6 only
 				i2p::config::GetOption("host", host);
 			else if (!ifname.empty())
@@ -113,7 +113,6 @@ namespace i2p
 					PublishNTCP2Address (port, true);
 			}
 		}
-
 	}
 
 	void RouterContext::UpdateRouterInfo ()

libi2pd/util.cpp

@@ -295,7 +295,10 @@ namespace net
 	{
 #ifdef WIN32
 		LogPrint(eLogError, "NetIface: cannot get address by interface name, not implemented on WIN32");
-		return boost::asio::ip::address::from_string("127.0.0.1");
+		if(ipv6)
+			return boost::asio::ip::address::from_string("::1");
+		else
+			return boost::asio::ip::address::from_string("127.0.0.1");
 #else
 		int af = (ipv6 ? AF_INET6 : AF_INET);
 		ifaddrs * addrs = nullptr;
@@ -327,7 +330,7 @@ namespace net
 		std::string fallback;
 		if(ipv6)
 		{
-			fallback = "::";
+			fallback = "::1";
 			LogPrint(eLogWarning, "NetIface: cannot find ipv6 address for interface ", ifname);
 		} else {
 			fallback = "127.0.0.1";