-extern int IPv4_SendPacket(tInterface *Iface, tIPv4 Address, int Protocol, int ID, int Length, const void *Data);
+extern Uint32 IPv4_Netmask(int FixedBits);
+extern int IPv4_SendPacket(tInterface *Iface, tIPv4 Address, int Protocol, int ID, tIPStackBuffer *Buffer);
+
+extern void IPv4_HandleError(tInterface *Iface, tIPErrorMode Mode, size_t Length, const void *Buf);