Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_utilities / lib / hosts.h

diff --git a/Security/libsecurity_utilities/lib/hosts.h b/Security/libsecurity_utilities/lib/hosts.h
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+/*
+ * Copyright (c) 2000-2004,2011,2014 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+//
+// 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 */