device: add global flag for disabling offloading

Add global flag to disable offloading or just warn on it.

src/util-device.c

@@ -39,6 +39,23 @@ static int live_devices_stats = 1;
 static int LiveSafeDeviceName(const char *devname,
                               char *newdevname, size_t destlen);
 
+static int g_live_devices_disable_offloading = 1;
+
+void LiveSetOffloadDisable(void)
+{
+    g_live_devices_disable_offloading = 1;
+}
+
+void LiveSetOffloadWarn(void)
+{
+    g_live_devices_disable_offloading = 0;
+}
+
+int LiveGetOffload(void)
+{
+    return g_live_devices_disable_offloading;
+}
+
 /**
  *  \brief Add a pcap device for monitoring
  *

src/util-device.h

@@ -34,6 +34,9 @@ typedef struct LiveDevice_ {
     TAILQ_ENTRY(LiveDevice_) next;
 } LiveDevice;
 
+void LiveSetOffloadDisable(void);
+void LiveSetOffloadWarn(void);
+int LiveGetOffload(void);
 
 int LiveRegisterDevice(const char *dev);
 int LiveGetDeviceCount(void);