107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* All rights reserved.
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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
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef TINS_ADDRESS_HELPERS_H
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#define TINS_ADDRESS_HELPERS_H
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#include <tins/hw_address.h>
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/**
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* \cond
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*/
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namespace Tins {
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class IPv4Address;
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class IPv6Address;
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namespace Internals {
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template<typename T>
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bool increment_buffer(T& addr) {
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typename T::iterator it = addr.end() - 1;
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while (it >= addr.begin() && *it == 0xff) {
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*it = 0;
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--it;
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}
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// reached end
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if (it < addr.begin()) {
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return true;
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}
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(*it)++;
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return false;
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}
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template<typename T>
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bool decrement_buffer(T& addr) {
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typename T::iterator it = addr.end() - 1;
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while (it >= addr.begin() && *it == 0) {
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*it = 0xff;
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--it;
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}
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// reached end
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if (it < addr.begin()) {
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return true;
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}
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(*it)--;
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return false;
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}
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bool increment(IPv4Address& addr);
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bool increment(IPv6Address& addr);
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bool decrement(IPv4Address& addr);
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bool decrement(IPv6Address& addr);
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template<size_t n>
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bool increment(HWAddress<n>& addr) {
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return increment_buffer(addr);
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}
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template<size_t n>
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bool decrement(HWAddress<n>& addr) {
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return decrement_buffer(addr);
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}
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IPv4Address last_address_from_mask(IPv4Address addr, IPv4Address mask);
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IPv6Address last_address_from_mask(IPv6Address addr, const IPv6Address& mask);
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template<size_t n>
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HWAddress<n> last_address_from_mask(HWAddress<n> addr, const HWAddress<n>& mask) {
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typename HWAddress<n>::iterator addr_iter = addr.begin();
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for (typename HWAddress<n>::const_iterator it = mask.begin(); it != mask.end(); ++it, ++addr_iter) {
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*addr_iter = *addr_iter | ~*it;
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}
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return addr;
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}
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} // Internals
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} // Tins
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/**
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* \endcond
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*/
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#endif // TINS_ADDRESS_HELPERS_H
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