--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlib/prophet/Link.h	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,90 @@
+/*
+ *    Copyright 2007 Baylor University
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#ifndef _PROPHET_LINK_FACADE_H_
+#define _PROPHET_LINK_FACADE_H_
+
+#include <string.h>
+#include <string>
+
+#include "AckList.h"
+
+namespace prophet
+{
+
+class Link
+{
+public:
+    /**
+     * Destructor
+     */
+    virtual ~Link() {}
+
+    ///@{ Accessors
+    virtual const char* nexthop() const = 0;
+    virtual const char* remote_eid() const = 0;
+    AckList* acks() { return &acks_; }
+    ///@}
+
+    ///@{ Operators
+    virtual bool operator==(const Link* l) const
+    { return strncmp(nexthop(),l->nexthop(),strlen(nexthop())) == 0; }
+    virtual bool operator<(const Link* l) const
+    { return strncmp(nexthop(),l->nexthop(),strlen(nexthop())) < 0; }
+    virtual bool operator==(const Link& l) const
+    { return strncmp(nexthop(),l.nexthop(),strlen(nexthop())) == 0; }
+    virtual bool operator<(const Link& l) const
+    { return strncmp(nexthop(),l.nexthop(),strlen(nexthop())) < 0; }
+    ///@}
+
+protected:
+    mutable AckList acks_; ///< track what's been sent, so we don't send more than once
+
+}; // class Link
+
+class LinkImpl : public Link
+{
+public:
+    /**
+     * Constructor
+     */
+    LinkImpl(const std::string& nexthop = "") :
+        next_hop_(nexthop) {}
+
+    /**
+     * Destructor
+     */
+    virtual ~LinkImpl() {}
+
+    ///@{ Accessors
+    const char* nexthop() const { return next_hop_.c_str(); }
+    const char* remote_eid() const { return next_hop_.c_str(); }
+    ///@}
+
+    ///@{ Mutators
+    void set_nexthop( const std::string& nexthop )
+    {
+        next_hop_.assign(nexthop);
+    }
+    ///@}
+
+protected:
+    std::string next_hop_;
+}; // class LinkImpl
+
+}; // namespace prophet
+
+#endif // _PROPHET_LINK_FACADE_H_