28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_NATTYPE_H__
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#define TALK_BASE_NATTYPE_H__
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namespace talk_base {
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/* Identifies each type of NAT that can be simulated. */
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enum NATType {
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NAT_OPEN_CONE,
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NAT_ADDR_RESTRICTED,
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NAT_PORT_RESTRICTED,
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NAT_SYMMETRIC
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};
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// Implements the rules for each specific type of NAT.
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class NAT {
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public:
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virtual ~NAT() { }
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// Determines whether this NAT uses both source and destination address when
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// checking whether a mapping already exists.
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virtual bool IsSymmetric() = 0;
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// Determines whether this NAT drops packets received from a different IP
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// the one last sent to.
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virtual bool FiltersIP() = 0;
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// Determines whether this NAT drops packets received from a different port
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// the one last sent to.
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virtual bool FiltersPort() = 0;
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// Returns an implementation of the given type of NAT.
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static NAT* Create(NATType type);
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};
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} // namespace talk_base
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#endif // TALK_BASE_NATTYPE_H__
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