cdsa/cdsa_utilities/hosts.h

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // hosts - value-semantics host identifier class
  21 //
  22 // @@@ use vector instead of set to preserve resolver-generated order?
  23 // @@@ preliminary implementation: at the very least, there'll be more subclasses (deferred, etc.)
  24 //
  25 #ifndef _H_HOSTS
  26 #define _H_HOSTS
  27
  28 #include "ip++.h"
  29 #include <Security/refcount.h>
  30 #include <set>
  31
  32
  33 namespace Security {
  34 namespace IPPlusPlus {
  35
  36
  37 //
  38 // Host identities
  39 //
  40 class Host {
  41 public:
  42     Host(const char *form);
  43     Host() { }
  44
  45     // equality is defined strongly: same host specification
  46     bool operator == (const Host &other) const;
  47     bool operator != (const Host &other) const  { return !(*this == other); }
  48     bool operator < (const Host &other) const;  // for STL sorting
  49
  50     // inclusion (<=) is defined semi-weakly: greater subsumes smaller, same access specs
  51     bool operator <= (const Host &other) const;
  52     bool operator >= (const Host &other) const  { return other <= *this; }
  53
  54     string name() const                                 { return mSpec->name(); }
  55     set<IPAddress> addresses() const    { return mSpec->addresses(); }
  56
  57 public:
  58     class Spec : public RefCount {
  59     public:
  60         virtual ~Spec() { }
  61
  62         virtual set<IPAddress> addresses() const = 0;
  63         virtual string name() const = 0;
  64
  65     private:
  66     };
  67
  68 private:
  69     RefPointer<Spec> mSpec;
  70 };
  71
  72 }       // end namespace IPPlusPlus
  73 }       // end namespace Security
  74
  75
  76 #endif /* _H_HOSTS */