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/*
* Copyright 2012-2020 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.
*/
#ifndef ALLOCATED_SOCKET_ADDRESS_HXX
#define ALLOCATED_SOCKET_ADDRESS_HXX
#include "SocketAddress.hxx" // IWYU pragma: export
#include "Features.hxx"
#include "util/Compiler.h"
#include <utility>
#include <stdlib.h>
struct sockaddr;
struct StringView;
class AllocatedSocketAddress {
public:
typedef SocketAddress::size_type size_type;
private:
struct sockaddr *address = nullptr;
size_type size = 0;
AllocatedSocketAddress(struct sockaddr *_address,
size_type _size)
:address(_address), size(_size) {}
public:
AllocatedSocketAddress() = default;
explicit AllocatedSocketAddress(SocketAddress src) noexcept {
*this = src;
}
AllocatedSocketAddress(const AllocatedSocketAddress &src) noexcept
:AllocatedSocketAddress((SocketAddress)src) {}
AllocatedSocketAddress(AllocatedSocketAddress &&src) noexcept
:address(src.address), size(src.size) {
src.address = nullptr;
src.size = 0;
}
~AllocatedSocketAddress() {
free(address);
}
AllocatedSocketAddress &operator=(SocketAddress src) noexcept;
AllocatedSocketAddress &operator=(const AllocatedSocketAddress &src) noexcept {
return *this = (SocketAddress)src;
}
AllocatedSocketAddress &operator=(AllocatedSocketAddress &&src) noexcept {
using std::swap;
swap(address, src.address);
swap(size, src.size);
return *this;
}
template<typename T>
gcc_pure
bool operator==(T &&other) const noexcept {
return (SocketAddress)*this == std::forward<T>(other);
}
template<typename T>
gcc_pure
bool operator!=(T &&other) const noexcept {
return !(*this == std::forward<T>(other));
}
gcc_const
static AllocatedSocketAddress Null() noexcept {
return AllocatedSocketAddress(nullptr, 0);
}
bool IsNull() const noexcept {
return address == nullptr;
}
size_type GetSize() const noexcept {
return size;
}
const struct sockaddr *GetAddress() const noexcept {
return address;
}
operator SocketAddress() const noexcept {
return SocketAddress(address, size);
}
operator const struct sockaddr *() const noexcept {
return address;
}
int GetFamily() const noexcept {
return address->sa_family;
}
/**
* Does the object have a well-defined address? Check !IsNull()
* before calling this method.
*/
bool IsDefined() const noexcept {
return GetFamily() != AF_UNSPEC;
}
void Clear() noexcept {
free(address);
address = nullptr;
size = 0;
}
#ifdef HAVE_UN
/**
* @see SocketAddress::GetLocalRaw()
*/
gcc_pure
StringView GetLocalRaw() const noexcept;
/**
* @see SocketAddress::GetLocalPath()
*/
gcc_pure
const char *GetLocalPath() const noexcept {
return ((SocketAddress)*this).GetLocalPath();
}
/**
* Make this a "local" address (UNIX domain socket). If the path
* begins with a '@', then the rest specifies an "abstract" local
* address.
*/
void SetLocal(const char *path) noexcept;
#endif
#ifdef HAVE_TCP
bool IsV6Any() const noexcept {
return ((SocketAddress)*this).IsV6Any();
}
bool IsV4Mapped() const noexcept {
return ((SocketAddress)*this).IsV4Mapped();
}
/**
* Extract the port number. Returns 0 if not applicable.
*/
gcc_pure
unsigned GetPort() const noexcept {
return ((SocketAddress)*this).GetPort();
}
/**
* @return true on success, false if this address cannot have
* a port number
*/
bool SetPort(unsigned port) noexcept;
static AllocatedSocketAddress WithPort(SocketAddress src,
unsigned port) noexcept {
AllocatedSocketAddress result(src);
result.SetPort(port);
return result;
}
AllocatedSocketAddress WithPort(unsigned port) const noexcept {
return WithPort(*this, port);
}
#endif
private:
void SetSize(size_type new_size) noexcept;
};
#endif
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