From: Brian Candler <b.candler@...>
Date: 2008-11-14T06:20:07+09:00
Subject: Re: How to set socket option SO_RCVTIMEO

Zakaria wrote:
> How to set socket option SO_RCVTIMEO in Windows XP?
> The C version use somekind struct.

First, read the option:

irb(main):001:0> require 'socket'
=> true
irb(main):002:0> s = TCPServer.new(1234)
=> #<TCPServer:0xb7d246d4>
irb(main):003:0> s.getsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO)
=> "\000\000\000\000\000\000\000\000"

So if it's a struct timeval, that's a 32-bit tv_sec followed by a 32-bit 
tv_usec. Not clear about the byte order, though, since it's all zero 
here.

So let's try native byte ordering, to set a timeout of 1.5 seconds (1 
second + 500,000 microseconds):

irb(main):008:0> n = [1, 500_000].pack("I_2")
=> "\001\000\000\000 \241\a\000"
irb(main):009:0> s.setsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, n 
)
=> 0
irb(main):010:0> s.accept
Errno::EAGAIN: Resource temporarily unavailable
  from (irb):10:in `accept'
  from (irb):10
  from :0

Yep, there was a pause of 1.5 seconds before the exception was raised.

Look OK?
-- 
Posted via http://www.ruby-forum.com/.