Changeset 50298 in vbox for trunk/src/VBox/HostDrivers/VBoxNetFlt/darwin/VBoxNetFlt-darwin.cpp

Timestamp:

Jan 31, 2014 10:54:41 AM (11 years ago)

Author:

vboxsync

Message:

Mac OS X host: Networking: prevent stuck-in-dock problem if cable is not attached to a network card device.

File:

• trunk/src/VBox/HostDrivers/VBoxNetFlt/darwin/VBoxNetFlt-darwin.cpp (modified) (2 diffs)

trunk/src/VBox/HostDrivers/VBoxNetFlt/darwin/VBoxNetFlt-darwin.cpp

@@ -983 +983 @@
 
 
+/**
+ * Attempt to detect if a cable is attached to a network card.
+ * There is no direct way to detect this at any time. We assume
+ * if interface's baud rate is not zero then cable is attached.
+ */
+static int vboxNetFltCableAttached(ifnet_t pIfNet)
+{
+    return (ifnet_baudrate(pIfNet) != 0);
+}
+
+
 int  vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, void *pvIfData, PINTNETSG pSG, uint32_t fDst)
 {
@@ -991 +1002 @@
     if (pIfNet)
     {
+        /*
+         * Do not send any data to a network stack if cable is not attached
+         * to a network card device in order to prevent stuck-in-dock problem. */
+        if (!vboxNetFltCableAttached(pIfNet))
+        {
+            vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
+            return rc;
+        }
+
         /*
          * Create a mbuf for the gather list and push it onto the wire.