refine network bytes of summaries, remove the lo data.

@@ -406,13 +406,18 @@ int SrsApiSummaries::do_process_request(SrsSocket* skt, SrsHttpMessage* req)
     int nb_n = srs_get_network_devices_count();
     int nb_n = srs_get_network_devices_count();
     for (int i = 0; i < nb_n; i++) {
     for (int i = 0; i < nb_n; i++) {
         SrsNetworkDevices& o = n[i];
         SrsNetworkDevices& o = n[i];
-        if (o.ok) {
+        
+        // ignore the lo interface.
+        std::string inter = o.name;
+        if (!o.ok || inter == "lo") {
+            continue;
+        }
+        
         n_ok = true;
         n_ok = true;
         nr_bytes += o.rbytes;
         nr_bytes += o.rbytes;
         ns_bytes += o.sbytes;
         ns_bytes += o.sbytes;
         n_sample_time = o.sample_time;
         n_sample_time = o.sample_time;
     }
     }
-    }
     
     
     ss << JOBJECT_START
     ss << JOBJECT_START
         << JFIELD_ERROR(ERROR_SUCCESS) << JFIELD_CONT
         << JFIELD_ERROR(ERROR_SUCCESS) << JFIELD_CONT

@@ -509,6 +509,7 @@ void srs_update_network_devices()
                 
                 
             if (ret == 17) {
             if (ret == 17) {
                 r.ok = true;
                 r.ok = true;
+                r.name[sizeof(r.name) - 1] = 0;
                 _nb_srs_system_network_devices = i + 1;
                 _nb_srs_system_network_devices = i + 1;
                 r.sample_time = srs_get_system_time_ms();
                 r.sample_time = srs_get_system_time_ms();
             }
             }