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/*
* Copyright 2012-2019 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SocketAddress.hxx"
#include "IPv4Address.hxx"
#include "IPv6Address.hxx"
#include "util/StringView.hxx"
#include <string.h>
#ifdef HAVE_UN
#include <sys/un.h>
#endif
#ifdef HAVE_TCP
#ifdef _WIN32
#include <ws2tcpip.h>
#else
#include <netinet/in.h>
#endif
#endif
bool
SocketAddress::operator==(SocketAddress other) const noexcept
{
return size == other.size && memcmp(address, other.address, size) == 0;
}
#ifdef HAVE_UN
StringView
SocketAddress::GetLocalRaw() const noexcept
{
if (IsNull() || GetFamily() != AF_LOCAL)
/* not applicable */
return nullptr;
const auto sun = (const struct sockaddr_un *)GetAddress();
const auto start = (const char *)sun;
const auto path = sun->sun_path;
const size_t header_size = path - start;
if (size < size_type(header_size))
/* malformed address */
return nullptr;
return {path, size - header_size};
}
const char *
SocketAddress::GetLocalPath() const noexcept
{
const auto raw = GetLocalRaw();
return !raw.empty() &&
/* must be an absolute path */
raw.front() == '/' &&
/* must be null-terminated */
raw.back() == 0 &&
/* there must not be any other null byte */
memchr(raw.data, 0, raw.size - 1) == nullptr
? raw.data
: nullptr;
}
#endif
#ifdef HAVE_TCP
bool
SocketAddress::IsV6Any() const noexcept
{
return GetFamily() == AF_INET6 && IPv6Address(*this).IsAny();
}
bool
SocketAddress::IsV4Mapped() const noexcept
{
return GetFamily() == AF_INET6 && IPv6Address(*this).IsV4Mapped();
}
unsigned
SocketAddress::GetPort() const noexcept
{
if (IsNull())
return 0;
switch (GetFamily()) {
case AF_INET:
return IPv4Address(*this).GetPort();
case AF_INET6:
return IPv6Address(*this).GetPort();
default:
return 0;
}
}
static constexpr ConstBuffer<void>
GetSteadyPart(const struct sockaddr_in &address) noexcept
{
return {&address.sin_addr, sizeof(address.sin_addr)};
}
static constexpr ConstBuffer<void>
GetSteadyPart(const struct sockaddr_in6 &address) noexcept
{
return {&address.sin6_addr, sizeof(address.sin6_addr)};
}
#endif
ConstBuffer<void>
SocketAddress::GetSteadyPart() const noexcept
{
if (IsNull())
return nullptr;
switch (GetFamily()) {
#ifdef HAVE_UN
case AF_LOCAL:
return GetLocalRaw().ToVoid();
#endif
#ifdef HAVE_TCP
case AF_INET:
return ::GetSteadyPart(*(const struct sockaddr_in *)(const void *)GetAddress());
case AF_INET6:
return ::GetSteadyPart(*(const struct sockaddr_in6 *)(const void *)GetAddress());
#endif
default:
return nullptr;
}
}