TCP SOCKET没有读的数据不想要了怎么办呢?

alpbrook

如果我通过TCP SOCKET读了前面的数据,后面的数据没有用了,请问是继续将后面的数据读完呢,还是有其它的函数可以将SOCKET BUFFER里的数据清空,抑或直接关闭SOCKET?

flw

可以直接关闭。
close(socket)

cugb_cat

close

alpbrook

Socket Shutdown

Once a socket is no longer required, the calling program can discard the socket by applying a close subroutine to the socket descriptor. If a reliable delivery socket has data associated with it when a close takes place, the system continues to attempt data transfer. However, if the data is still undelivered, the system discards the data. Should the application program have no use for any pending data, it can use the shutdown subroutine on the socket prior to closing it.

flw

是否应该先 shutdown 再 close，要根据你的情况来定。
通常来说，不存在先 shutdown 再 close 就一定要比只 close 要好的情况，除非你的程序设计得有问题。