boost::asio::ip::tcp::acceptor如何使用TCP_DEFER_ACCEPT和TCP_FASTOPEN

Question

boost::asio::ip::tcp::acceptor如何使用TCP_DEFER_ACCEPT和TCP_FASTOPEN，

当我使用纯C语言时，我可以设置一些参数，比如TCP_DEFER_ACCEPT和TCP_FASTOPEN，来提高tcp/ip的性能，比如: setsockopt(serverSock，IPPROTO_TCP，TCP_DEFER_ACCEPT，&soValue，sizeof(soValue))；setsockopt( serverSock，SOL_TCP，TCP_FASTOPEN，&qlen，sizeof(qlen))；但是当我使用boost：：asio时，我找不到任何方法来设置TCP_DEFER_ACCEPT和TCP_FASTOPEN，谁能告诉我怎么解决呢？谢谢。

Answer 1

这样啊，原来是这么回事。使用boost::asio::ip::tcp::acceptor::native_handle().

示例：

std::shared_ptr<boost::asio::ip::tcp::acceptor>   sp_acceptor( std::make_shared<boost::asio::ip::tcp::acceptor>( d_ios_last0 ) );
sp_acceptor->open( server_endpoint.protocol() );
sp_acceptor->set_option( boost::asio::ip::tcp::acceptor::reuse_address( true  ) );
if( bool_tcp_defer_accept )  {
  int soValue = 1;
  if( 0 == setsockopt( sp_acceptor->native_handle(), IPPROTO_TCP, TCP_DEFER_ACCEPT, &soValue, sizeof(soValue)) )  {
    log_message( "TCP_DEFER_ACCEPT set success." );
    }
  else  {
    warn_message( "TCP_DEFER_ACCEPT set failed." );
    }
  }
sp_acceptor->bind( server_endpoint );
if( bool_tcp_fastopen )  {
  int qlen=5;
  if( 0==setsockopt( sp_acceptor->native_handle(), SOL_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) ) {
    log_message( "TCP_FASTOPEN set success." );
    }
  else  {
    warn_message( "TCP_FASTOPEN set failed." );
    }
  }
sp_acceptor->listen( 8192 );