Added dynamic local and external ip reconfiguration. I still need to reset connexions when changing ips.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1796 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/pqi/p3connmgr.cc

@@ -290,12 +290,13 @@ void p3ConnectMgr::netReset()
 	    return;
 	}
 
-
-
 	std::cerr << "p3ConnectMgr::netReset() shutdown" << std::endl;
 
 	shutdown(); /* blocking shutdown call */
 
+	// Will initiate a new call for determining the external ip.
+	mExtAddrFinder->reset() ;
+
 	std::cerr << "p3ConnectMgr::netReset() reset NetStatus" << std::endl;
 	{
 		RsStackMutex stack(connMtx); /****** STACK LOCK MUTEX *******/
@@ -2931,6 +2932,69 @@ bool    p3ConnectMgr::setVisState(std::string id, uint32_t visState)
 
 /*******************************************************************/
 
+bool 	p3ConnectMgr::checkNetAddress()
+{
+	in_addr_t old_in_addr = ownState.localaddr.sin_addr.s_addr;
+	int old_in_port = ownState.localaddr.sin_port;
+
+	{
+		RsStackMutex stack(connMtx); /****** STACK LOCK MUTEX *******/
+
+		// GetPreferredInterface now chooses the best local ilterface for you. So it's the default function to use now.
+		//
+		ownState.localaddr.sin_addr = getPreferredInterface() ;
+
+		if(ownState.localaddr.sin_addr.s_addr != 0)
+		{
+			if (netFlagLocalOk != true) 
+			{
+#ifdef CONN_DEBUG
+				std::cerr << "p3ConnectMgr::checkNetAddress() changing netFlagOk to true.";
+				std::cerr << std::endl;
+#endif
+				netFlagLocalOk = true;
+				IndicateConfigChanged();
+			}
+		} 
+
+		if(isLoopbackNet(&(ownState.localaddr.sin_addr)))
+			mNetStatus = RS_NET_LOOPBACK;
+
+		int port = ntohs(ownState.localaddr.sin_port);
+
+		if ((port < PQI_MIN_PORT) || (port > PQI_MAX_PORT))
+			ownState.localaddr.sin_port = htons(PQI_DEFAULT_PORT);
+
+		/* if localaddr = serveraddr, then ensure that the ports
+		 * are the same (modify server)... this mismatch can
+		 * occur when the local port is changed....
+		 */
+		if (ownState.localaddr.sin_addr.s_addr == ownState.serveraddr.sin_addr.s_addr)
+			ownState.serveraddr.sin_port = ownState.localaddr.sin_port;
+
+		// ensure that address family is set, otherwise windows Barfs.
+		ownState.localaddr.sin_family = AF_INET;
+		ownState.serveraddr.sin_family = AF_INET;
+
+#ifdef CONN_DEBUG
+		std::cerr << "p3ConnectMgr::checkNetAddress() Final Local Address: ";
+		std::cerr << inet_ntoa(ownState.localaddr.sin_addr);
+		std::cerr << ":" << ntohs(ownState.localaddr.sin_port);
+		std::cerr << std::endl;
+#endif
+	}
+
+	if ((old_in_addr != ownState.localaddr.sin_addr.s_addr) || (old_in_port != ownState.localaddr.sin_port)) 
+	{
+#ifdef CONN_DEBUG
+		std::cerr << "p3ConnectMgr::checkNetAddress() local address changed, resetting network." << std::endl;
+#endif
+		netReset();
+	}
+
+	return 1;
+}
+#ifdef TO_REMOVE
 bool 	p3ConnectMgr::checkNetAddress()
 {
 	std::list<std::string> addrs = getLocalInterfaces();
@@ -3001,11 +3065,9 @@ bool 	p3ConnectMgr::checkNetAddress()
 		  * are the same (modify server)... this mismatch can
 		  * occur when the local port is changed....
 		  */
-	    if (ownState.localaddr.sin_addr.s_addr ==
-			    ownState.serveraddr.sin_addr.s_addr)
+		 if (ownState.localaddr.sin_addr.s_addr == ownState.serveraddr.sin_addr.s_addr)
 		 {
-		    ownState.serveraddr.sin_port =
-			    ownState.localaddr.sin_port;
+			 ownState.serveraddr.sin_port = ownState.localaddr.sin_port;
 		 }
 
 		 // ensure that address family is set, otherwise windows Barfs.
@@ -3020,7 +3082,8 @@ bool 	p3ConnectMgr::checkNetAddress()
 #endif
 	}
 
-	if ((old_in_addr != ownState.localaddr.sin_addr.s_addr) || (old_in_port != ownState.localaddr.sin_port)) {
+	if ((old_in_addr != ownState.localaddr.sin_addr.s_addr) || (old_in_port != ownState.localaddr.sin_port)) 
+	{
 #ifdef CONN_DEBUG
 		std::cerr << "p3ConnectMgr::checkNetAddress() local address changed, resetting network." << std::endl;
 #endif
@@ -3029,6 +3092,7 @@ bool 	p3ConnectMgr::checkNetAddress()
 
 	return 1;
 }
+#endif
 
 
 /************************* p3config functions **********************/

libretroshare/src/pqi/pqinetwork.cc

@@ -179,6 +179,20 @@ std::list<std::string> getLocalInterfaces()
 			out << std::endl;
 			pqioutput(PQL_DEBUG_BASIC, pqinetzone, out.str());
 
+			// Now check wether the interface is up and running. If not, we don't use it!!
+			//
+			if(ioctl(sock,SIOCGIFFLAGS,&ifreq) != 0)
+			{
+				std::cerr << "Could not get flags from interface " << ifptr -> if_name << std::endl ;
+				continue ;
+			}
+#ifdef NET_DEBUG
+			std::cout << out.str() ;
+			std::cout << "flags = " << ifreq.ifr_flags << std::endl ;
+#endif
+			if((ifreq.ifr_flags & IFF_UP) == 0) continue ;
+			if((ifreq.ifr_flags & IFF_RUNNING) == 0) continue ;
+
 			addrs.push_back(astr);
 		}
 	}
@@ -533,6 +547,9 @@ struct in_addr getPreferredInterface() // returns best addr.
 	for(it = addrs.begin(); it != addrs.end(); it++)
 	{
 		inet_aton((*it).c_str(), &addr);
+
+		std::cout << "Examining addr = " << (void*)addr.s_addr << std::endl ;
+
 		// for windows silliness (returning 0.0.0.0 as valid addr!).
 		if (addr.s_addr == 0)
 		{
@@ -562,12 +579,15 @@ struct in_addr getPreferredInterface() // returns best addr.
 		{
 			if (!found_ext)
 			{
+				std::cerr << "Found external address " << (void*)addr.s_addr << std::endl ;
 				found_ext = true;
 				addr_ext = addr;
+			}
+		}
+	}
+
+	if(found_ext)					// external address is best.
 		return addr_ext ;
-			}
-		}
-	}
 
 	if (found_priv)
 		return addr_priv;

libretroshare/src/tcponudp/extaddrfinder.cc

@@ -231,12 +231,28 @@ bool ExtAddrFinder::hasValidIP(struct sockaddr_in *addr)
 	return *_found ;
 }
 
+void ExtAddrFinder::reset()
+{
+	while(*_searching) 
+#ifdef WIN32
+		Sleep(1000) ;
+#else
+		sleep(1) ;
+#endif
+
+	RsStackMutex mut(_addrMtx) ;
+
+	*_found = false ;
+	*_searching = false ;
+	*mFoundTS = time(NULL) - MAX_IP_STORE;
+}
+
 ExtAddrFinder::~ExtAddrFinder()
 {
 #ifdef EXTADDRSEARCH_DEBUG
 	std::cerr << "ExtAddrFinder: Deleting ExtAddrFinder." << std::endl ;
 #endif
-	while(!*_searching) 
+	while(*_searching) 
 #ifdef WIN32
 		Sleep(1000) ;
 #else

libretroshare/src/tcponudp/extaddrfinder.h

@@ -17,6 +17,8 @@ class ExtAddrFinder
 
 		void start_request() ;
 
+		void reset() ;
+
 	private:
 		friend void* doExtAddrSearch(void *p) ;