setsockopt
描述 (Description)
此函数在SOCKET上以指定的LEVEL设置套接字选项OPTNAME，其值为OPTVAL。 您将需要导入Socket模块以获取Tabl中显示的OPTNAME的有效值
语法 (Syntax)
以下是此函数的简单语法 -
setsockopt SOCKET, LEVEL, OPTNAME, OPTVAL
返回值 (Return Value)
此函数在失败时返回undef，在成功时返回1。
OPTNAME Description
SO_DEBUG Enable/disable recording of debugging information.
SO_REUSEADDR Enable/disable local address reuse.
SO_KEEPALIVE Enable/disable keep connections alive.
SO_DONTROUTE Enable/disable routing bypass for outgoing messages.
SO_LINGER Linger on close if data is present.
SO_BROADCAST Enable/disable permission to transmit broadcast messages.
SO_OOBINLINE Enable/disable reception of out-of-band data in band.
SO_SNDBUF Set buffer size for output.
SO_RCVBUF Set buffer size for input.
SO_TYPE Get the type of the socket (get only).
SO_ERROR Get and clear error on the socket (get only).
