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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/sockaddr_storage.h"
#include <string.h>
#include <type_traits>
#include "base/containers/span.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_WIN)
#include <winsock2.h>
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
#include <sys/socket.h>
#endif
namespace net {
namespace {
// Templated because otherwise the compiler attempts to instantiate both arms of
// the constexpr if, which causes compile failures in the non-matching arm.
template <typename T>
void copy_from(T& dest, const T& src) {
// `sockaddr_storage` nominally may contain padding, depending on the
// implementation. However, in actuality, it's a wrapper around some block of
// memory that's holding a `sockaddr`, and we need to copy all the bytes to
// make sure we copy the full stored type. So allow byte spanification here.
if constexpr (std::has_unique_object_representations_v<T>) {
base::byte_span_from_ref(dest).copy_from(base::byte_span_from_ref(src));
} else {
base::byte_span_from_ref(base::allow_nonunique_obj, dest)
.copy_from(base::byte_span_from_ref(base::allow_nonunique_obj, src));
}
}
} // namespace
SockaddrStorage::SockaddrStorage() = default;
SockaddrStorage::SockaddrStorage(const SockaddrStorage& other)
: addr_len(other.addr_len) {
copy_from(addr_storage, other.addr_storage);
}
SockaddrStorage& SockaddrStorage::operator=(const SockaddrStorage& other) {
addr_len = other.addr_len;
copy_from(addr_storage, other.addr_storage);
return *this;
}
} // namespace net
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