94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/*
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* Copyright 2012-2020 Max Kellermann <max.kellermann@gmail.com>
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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
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* are 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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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* 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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "IPv6Address.hxx"
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#include "IPv4Address.hxx"
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#include <cassert>
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#include <string.h>
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IPv6Address::IPv6Address(SocketAddress src) noexcept
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:address(src.CastTo<struct sockaddr_in6>())
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{
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assert(!src.IsNull());
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assert(src.GetFamily() == AF_INET6);
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}
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bool
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IPv6Address::IsAny() const noexcept
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{
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assert(IsValid());
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return memcmp(&address.sin6_addr,
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&in6addr_any, sizeof(in6addr_any)) == 0;
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}
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IPv4Address
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IPv6Address::UnmapV4() const noexcept
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{
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assert(IsV4Mapped());
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struct sockaddr_in buffer{};
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buffer.sin_family = AF_INET;
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memcpy(&buffer.sin_addr, ((const char *)&address.sin6_addr) + 12,
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sizeof(buffer.sin_addr));
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buffer.sin_port = address.sin6_port;
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return buffer;
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}
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template<typename T>
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static void
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BitwiseAndT(T *dest, const T *a, const T *b, size_t n)
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{
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while (n-- > 0)
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*dest++ = *a++ & *b++;
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}
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static void
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BitwiseAnd32(void *dest, const void *a, const void *b, size_t n)
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{
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using value_type = uint32_t;
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using pointer = value_type *;
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using const_pointer = const value_type *;
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BitwiseAndT(pointer(dest), const_pointer(a), const_pointer(b),
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n / sizeof(value_type));
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}
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IPv6Address
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IPv6Address::operator&(const IPv6Address &other) const
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{
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IPv6Address result;
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BitwiseAnd32(&result, this, &other,
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sizeof(result));
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return result;
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}
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