Windows 中 SO_RCVBUF 的最大值？
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max value for SO_RCVBUF in Windows?
提问by PiNoYBoY82
Quick question, wondering if anyone knew what the limit is for SO_RCVBUF under Windows.
快速提问，想知道是否有人知道 Windows 下 SO_RCVBUF 的限制是多少。
采纳答案by a_mole
SO_RCVBUF in winsock is not limited by the TCP window size. At least for pre-Vista stacks. It would be limited by non-paged pool availability, which is a whole different topic. So you can make it quite big, if you want to.
winsock 中的 SO_RCVBUF 不受 TCP 窗口大小的限制。至少对于Vista 之前的堆栈。它将受到非分页池可用性的限制，这是一个完全不同的主题。所以你可以把它做得很大，如果你愿意的话。
Obligatory unsolicited advice: If you are using a large buffer because you are receiving infrequently, I would look into asynchronous I/O with events/select/completion ports.
强制性的主动建议：如果您因为接收频率低而使用大缓冲区，我会研究带有事件/选择/完成端口的异步 I/O。
回答by dwc
I can't recall for sure, but I believe Windows supports the POSIX function fpathconf()with the _PC_SOCK_MAXBUFoption. If so, this is exactly what you're looking for.
我不记得了，但我相信 Windows 支持fpathconf()带有该_PC_SOCK_MAXBUF选项的 POSIX 功能。如果是这样，这正是您要寻找的。
回答by Michael Kristofik
Based on this article, it looks like the maximum is 64K.
根据这篇文章，看起来最大值是 64K。
