[SSU] handle socket binding errors

Signed-off-by: R4SAS <r4sas@i2pmail.org>

libi2pd/NTCP2.cpp

@@ -1195,11 +1195,11 @@ namespace transport
 							}
 							catch ( std::exception & ex )
 							{
-								LogPrint(eLogError, "NTCP2: Failed to bind to ip4 port ",address->port, ex.what());
+								LogPrint(eLogError, "NTCP2: Failed to bind to v4 port ",address->port, ex.what());
 								continue;
 							}
 
-							LogPrint (eLogInfo, "NTCP2: Start listening TCP port ", address->port);
+							LogPrint (eLogInfo, "NTCP2: Start listening v6 TCP port ", address->port);
 							auto conn = std::make_shared<NTCP2Session>(*this);
 							m_NTCP2Acceptor->async_accept(conn->GetSocket (), std::bind (&NTCP2Server::HandleAccept, this, conn, std::placeholders::_1));
 						}
@@ -1214,11 +1214,11 @@ namespace transport
 								m_NTCP2V6Acceptor->bind (boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v6(), address->port));
 								m_NTCP2V6Acceptor->listen ();
 
-								LogPrint (eLogInfo, "NTCP2: Start listening V6 TCP port ", address->port);
+								LogPrint (eLogInfo, "NTCP2: Start listening v6 TCP port ", address->port);
 								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, "NTCP2: failed to bind to ip6 port ", address->port);
+								LogPrint(eLogError, "NTCP2: failed to bind to v6 port ", address->port);
 								continue;
 							}
 						}

libi2pd/NTCPSession.cpp

@@ -820,9 +820,10 @@ namespace transport
 							try
 							{
 								m_NTCPAcceptor = new boost::asio::ip::tcp::acceptor (m_Service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), address->port));
+								LogPrint (eLogInfo, "NTCP: Start listening v6 TCP port ", address->port);
 							} catch ( std::exception & ex ) {
 								/** fail to bind ip4 */
-								LogPrint(eLogError, "NTCP: Failed to bind to ip4 port ",address->port, ex.what());
+								LogPrint(eLogError, "NTCP: Failed to bind to v4 port ",address->port, ex.what());
 								continue;
 							}
 
@@ -841,11 +842,11 @@ namespace transport
 								m_NTCPV6Acceptor->bind (boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v6(), address->port));
 								m_NTCPV6Acceptor->listen ();
 
-								LogPrint (eLogInfo, "NTCP: Start listening V6 TCP port ", address->port);
+								LogPrint (eLogInfo, "NTCP: Start listening v6 TCP port ", address->port);
 								auto conn = std::make_shared<NTCPSession> (*this);
 								m_NTCPV6Acceptor->async_accept(conn->GetSocket (), std::bind (&NTCPServer::HandleAcceptV6, this, conn, std::placeholders::_1));
 							} catch ( std::exception & ex ) {
-								LogPrint(eLogError, "NTCP: failed to bind to ip6 port ", address->port);
+								LogPrint(eLogError, "NTCP: failed to bind to v6 port ", address->port);
 								continue;
 							}
 						}

libi2pd/SSU.cpp

@@ -45,19 +45,29 @@ namespace transport
 
 	void SSUServer::OpenSocket ()
 	{
+		try {
 			m_Socket.open (boost::asio::ip::udp::v4());
 			m_Socket.set_option (boost::asio::socket_base::receive_buffer_size (SSU_SOCKET_RECEIVE_BUFFER_SIZE));
 			m_Socket.set_option (boost::asio::socket_base::send_buffer_size (SSU_SOCKET_SEND_BUFFER_SIZE));
 			m_Socket.bind (m_Endpoint);
+			LogPrint (eLogInfo, "SSU: Start listening v4 port ", m_Endpoint.port());
+		} catch ( std::exception & ex ) {
+			LogPrint (eLogError, "SSU: failed to bind to v4 port ", m_Endpoint.port(), ": ", ex.what());
+		}
 	}
 
 	void SSUServer::OpenSocketV6 ()
 	{
+		try {
 			m_SocketV6.open (boost::asio::ip::udp::v6());
 			m_SocketV6.set_option (boost::asio::ip::v6_only (true));
 			m_SocketV6.set_option (boost::asio::socket_base::receive_buffer_size (SSU_SOCKET_RECEIVE_BUFFER_SIZE));
 			m_SocketV6.set_option (boost::asio::socket_base::send_buffer_size (SSU_SOCKET_SEND_BUFFER_SIZE));
 			m_SocketV6.bind (m_EndpointV6);
+			LogPrint (eLogInfo, "SSU: Start listening v6 port ", m_EndpointV6.port());
+		} catch ( std::exception & ex ) {
+			LogPrint (eLogError, "SSU: failed to bind to v6 port ", m_EndpointV6.port(), ": ", ex.what());
+		}
 	}
 
 	void SSUServer::Start ()