+/*
+ * DLT_PPP_WITH_DIRECTION is in current libpcap cvs, and should be in
+ * libpcap-0.8.4. Until that is released, use DLT_PPP - but that means
+ * we lose the inbound and outbound qualifiers.
+ */
+#ifndef DLT_PPP_WITH_DIRECTION
+#define DLT_PPP_WITH_DIRECTION DLT_PPP
+#endif