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diff --git a/src/dev/ethertap.hh b/src/dev/ethertap.hh
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+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* @file
+ * Interface to connect a simulated ethernet device to the real world
+ */
+
+#ifndef __ETHERTAP_HH__
+#define __ETHERTAP_HH__
+
+#include <queue>
+#include <string>
+
+#include "dev/etherint.hh"
+#include "dev/etherpkt.hh"
+#include "sim/eventq.hh"
+#include "base/pollevent.hh"
+#include "sim/sim_object.hh"
+
+class TapEvent;
+class TapListener;
+
+/*
+ * Interface to connect a simulated ethernet device to the real world
+ */
+class EtherTap : public EtherInt
+{
+  protected:
+    friend class TapEvent;
+    TapEvent *event;
+
+  protected:
+    friend class TapListener;
+    TapListener *listener;
+    int socket;
+    char *buffer;
+    int buflen;
+    int32_t buffer_offset;
+    int32_t data_len;
+
+    EtherDump *dump;
+
+    void attach(int fd);
+    void detach();
+
+  protected:
+    std::string device;
+    std::queue<EthPacketPtr> packetBuffer;
+
+    void process(int revent);
+    void enqueue(EthPacketData *packet);
+    void retransmit();
+
+    /*
+     */
+    class TxEvent : public Event
+    {
+      protected:
+        EtherTap *tap;
+
+      public:
+        TxEvent(EtherTap *_tap)
+            : Event(&mainEventQueue), tap(_tap) {}
+        void process() { tap->retransmit(); }
+        virtual const char *description() { return "retransmit event"; }
+    };
+
+    friend class TxEvent;
+    TxEvent txEvent;
+
+  public:
+    EtherTap(const std::string &name, EtherDump *dump, int port, int bufsz);
+    virtual ~EtherTap();
+
+    virtual bool recvPacket(EthPacketPtr packet);
+    virtual void sendDone();
+
+    virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
+};
+
+#endif // __ETHERTAP_HH__