48b4c725
 Peter M. Groen
Setting up Socket-pp
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timeval to_timeval(const microseconds& dur)
{
const seconds sec = duration_cast<seconds>(dur);
timeval tv;
#if defined(_WIN32)
tv.tv_sec = long(sec.count());
#else
tv.tv_sec = time_t(sec.count());
#endif
tv.tv_usec = suseconds_t(duration_cast<microseconds>(dur - sec).count());
return tv;
}
int socket::get_last_error()
{
#if defined(_WIN32)
return ::WSAGetLastError();
#else
int err = errno;
return err;
#endif
}
bool socket::close(socket_t h)
{
#if defined(_WIN32)
return ::closesocket(h) >= 0;
#else
return ::close(h) >= 0;
#endif
}
void socket::initialize()
{
#if defined(_WIN32)
WSADATA wsadata;
::WSAStartup(MAKEWORD(2, 0), &wsadata);
#else
// Don't signal on socket write errors.
::signal(SIGPIPE, SIG_IGN);
#endif
}
void socket::destroy()
{
#if defined(_WIN32)
::WSACleanup();
#endif
}
socket socket::create(int domain, int type, int protocol /*=0*/)
{
socket sock(::socket(domain, type, protocol));
if (!sock)
sock.clear(get_last_error());
return sock;
}
socket socket::clone() const
{
socket_t h = INVALID_SOCKET;
#if defined(_WIN32)
WSAPROTOCOL_INFO protInfo;
if (::WSADuplicateSocket(handle_, ::GetCurrentProcessId(), &protInfo) == 0)
h = ::WSASocket(AF_INET, SOCK_STREAM, 0, &protInfo, 0, WSA_FLAG_OVERLAPPED);
// TODO: Set lastErr_ on failure
#else
h = ::dup(handle_);
#endif
return socket(h);
}
std::tuple<socket, socket> socket::pair(int domain, int type, int protocol /*=0*/)
{
socket sock0, sock1;
#if !defined(_WIN32)
int sv[2];
int ret = ::socketpair(domain, type, protocol, sv);
if (ret == 0) {
sock0.reset(sv[0]);
sock1.reset(sv[1]);
}
else {
int err = get_last_error();
sock0.clear(err);
sock1.clear(err);
}
#else
sock0.clear(ENOTSUP);
sock1.clear(ENOTSUP);
#endif
// TODO: Should we set an "unsupported" error on Windows?
return std::make_tuple<socket, socket>(std::move(sock0), std::move(sock1));
}
void socket::reset(socket_t h /*=INVALID_SOCKET*/)
{
socket_t oh = handle_;
handle_ = h;
if (oh != INVALID_SOCKET)
close(oh);
clear();
}
bool socket::bind(const sock_address& addr)
{
return check_ret_bool(::bind(handle_, addr.sockaddr_ptr(), addr.size()));
}
sock_address_any socket::address() const
{
auto addrStore = sockaddr_storage{};
socklen_t len = sizeof(sockaddr_storage);
if (!check_ret_bool(::getsockname(handle_,
reinterpret_cast<sockaddr*>(&addrStore), &len)))
return sock_address_any{};
return sock_address_any(addrStore, len);
}
sock_address_any socket::peer_address() const
{
auto addrStore = sockaddr_storage{};
socklen_t len = sizeof(sockaddr_storage);
if (!check_ret_bool(::getpeername(handle_,
reinterpret_cast<sockaddr*>(&addrStore), &len)))
return sock_address_any{};
return sock_address_any(addrStore, len);
}
bool socket::get_option(int level, int optname, void* optval, socklen_t* optlen) const
{
#if defined(_WIN32)
if (optval && optlen) {
int len = static_cast<int>(*optlen);
if (check_ret_bool(::getsockopt(handle_, level, optname,
static_cast<char*>(optval), &len))) {
*optlen = static_cast<socklen_t>(len);
return true;
}
}
return false;
#else
return check_ret_bool(::getsockopt(handle_, level, optname, optval, optlen));
#endif
}
bool socket::set_option(int level, int optname, const void* optval, socklen_t optlen)
{
#if defined(_WIN32)
return check_ret_bool(::setsockopt(handle_, level, optname,
static_cast<const char*>(optval),
static_cast<int>(optlen)));
#else
return check_ret_bool(::setsockopt(handle_, level, optname, optval, optlen));
#endif
}
bool socket::set_non_blocking(bool on /*=true*/)
{
#if defined(_WIN32)
unsigned long mode = on ? 1 : 0;
return check_ret_bool(::ioctlsocket(handle_, FIONBIO, &mode));
#else
/**
* TODO: Consider a generic function:
* bool set_flag(int flag, bool on=true);
* Used like:
* set_flag(O_NONBLOCK, on);
*/
int flags = ::fcntl(handle_, F_GETFL, 0);
if (flags == -1) {
set_last_error();
return false;
}
flags = on ? (flags | O_NONBLOCK) : (flags & ~O_NONBLOCK);
if (::fcntl(handle_, F_SETFL, flags) == -1) {
set_last_error();
return false;
}
return true;
#endif
}
std::string socket::error_str(int err)
{
return sys_error::error_str(err);
}
bool socket::shutdown(int how /*=SHUT_RDWR*/)
{
return check_ret_bool(::shutdown(handle_, how));
}
bool socket::close()
{
if (handle_ != INVALID_SOCKET) {
if (!close(release())){
set_last_error();
return false;
}
}
return true;
}
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