mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 13:07:55 +00:00
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef ZT_EXTERNALSURFACE_HPP
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#define ZT_EXTERNALSURFACE_HPP
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#include "InetAddress.hpp"
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namespace ZeroTier {
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/**
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* Tracks changes to this peer's real world addresses
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*/
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class ExternalSurface
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{
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public:
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ExternalSurface() {}
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/**
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* Revise our external surface image, return true if it changed
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*
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* @param remote Remote address as reflected by any trusted peer
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* @return True if our external surface has changed
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*/
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inline bool update(const InetAddress &remote)
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throw()
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{
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const unsigned long idx = (remote.isV4() ? 0 : 2) | (remote.isLinkLocal() ? 1 : 0);
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if (_s[idx] != remote) {
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_s[idx] = remote;
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return true;
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}
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return false;
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}
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private:
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InetAddress _s[4]; // global v4, link-local v4, global v6, link-local v6
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};
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} // namespace ZeroTier
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#endif
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