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68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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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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