Re: min-write-size for a UDP socket to be POLLOUT cannot be set. (proposed fixes)

From: Richard B. Johnson (
Date: Mon Dec 10 2001 - 15:00:45 EST

On Mon, 10 Dec 2001, Ben Greear wrote:

> This relates to my earlier question about setting the threshold
> at which select returns that a (UDP) socket is writable.
> It appears that UDP sockets are hardwired at 2048 bytes...
> From linux/include/net/sock.h:

    int len = 0x8000;

    setsockopt(s, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len));
    setsockopt(s, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));

Doesn't this work?

Dick Johnson

Penguin : Linux version 2.4.1 on an i686 machine (799.53 BogoMips).

    I was going to compile a list of innovations that could be
    attributed to Microsoft. Once I realized that Ctrl-Alt-Del
    was handled in the BIOS, I found that there aren't any.

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This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:18 EST