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hosts.h

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
 * 
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//
// hosts - value-semantics host identifier class
//
// @@@ use vector instead of set to preserve resolver-generated order?
// @@@ preliminary implementation: at the very least, there'll be more subclasses (deferred, etc.)
//
#ifndef _H_HOSTS
#define _H_HOSTS

#include "ip++.h"
#include <security_utilities/refcount.h>
#include <set>


namespace Security {
namespace IPPlusPlus {


//
// Host identities
//
class Host {
public:
    Host(const char *form);
    Host() { }

    // equality is defined strongly: same host specification
    bool operator == (const Host &other) const;
    bool operator != (const Host &other) const  { return !(*this == other); }
    bool operator < (const Host &other) const;  // for STL sorting
    
    // inclusion (<=) is defined semi-weakly: greater subsumes smaller, same access specs
    bool operator <= (const Host &other) const;
    bool operator >= (const Host &other) const  { return other <= *this; }
    
    string name() const                         { return mSpec->name(); }
    set<IPAddress> addresses() const      { return mSpec->addresses(); }

public:
    class Spec : public RefCount {
    public:
        virtual ~Spec() { }
        
        virtual set<IPAddress> addresses() const = 0;
        virtual string name() const = 0;
    
    private:
    };

private:
    RefPointer<Spec> mSpec;
};

}     // end namespace IPPlusPlus
}     // end namespace Security


#endif /* _H_HOSTS */

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