--- gvpe/src/device.h	2003/03/01 15:53:03	1.1
+++ gvpe/src/device.h	2003/04/08 02:00:54	1.5
@@ -19,10 +19,6 @@
 #ifndef VPE_DEVICE_H__
 #define VPE_DEVICE_H__
 
-#include "config.h"
-
-#include <cstdlib>
-
 #include <net/if.h>
 
 #include "gettext.h"
@@ -32,7 +28,25 @@
 struct net_packet {
   u32 len; // actually u16, but padding...
 
-  u8 &operator[] (u16 offset);
+  u8 &operator[] (u16 offset) const;
+
+  void unshift_hdr (u16 hdrsize)
+    {
+      memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
+      len += hdrsize;
+    }
+
+  void skip_hdr (u16 hdrsize)
+    {
+      len -= hdrsize;
+      memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
+    }
+
+  void set (const net_packet &pkt)
+    {
+      len = pkt.len;
+      memcpy (&((*this)[0]), &(pkt[0]), len);
+    }
 
   bool is_arp ()
     {
@@ -51,7 +65,7 @@
 };
 
 inline 
-u8 &net_packet::operator[] (u16 offset)
+u8 &net_packet::operator[] (u16 offset) const
 {
   return ((data_packet *)this)->data_[offset];
 }