fix #141, support tun0(vpn network device) ip retrieve. 0.9.179.

@@ -207,6 +207,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-07-31, fix [#141](https://github.com/winlinvip/simple-rtmp-server/issues/141), support tun0(vpn network device) ip retrieve. 0.9.179.
 * v1.0, 2014-07-27, support build on OSX(Darwin). 0.9.177
 * v1.0, 2014-07-27, api connections add udp, add disk iops. 0.9.176
 * v1.0, 2014-07-26, complete config utest. 0.9.173

@@ -930,6 +930,13 @@ void retrieve_local_ipv4_ips()
     while (p != NULL) {
         sockaddr* addr = p->ifa_addr;
         
+        // ignore the tun0 network device, 
+        // which addr is NULL.
+        // @see: https://github.com/winlinvip/simple-rtmp-server/issues/141
+        if (!addr) {
+            continue;
+        }
+        
         // retrieve ipv4 addr
         if (addr->sa_family == AF_INET) {
             in_addr* inaddr = &((sockaddr_in*)addr)->sin_addr;

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "178"
+#define VERSION_REVISION "179"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"