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Re: broadcast to 255.255.255.255
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Re: broadcast to 255.255.255.255

  • Subject: Re: broadcast to 255.255.255.255
  • From: Vincent Lubet <email@hidden>
  • Date: Thu, 3 Apr 2003 09:23:20 -0800
On Thursday, April 3, 2003, at 12:46 AM, Satoshi Hirata wrote:

Hi

I'm developing a application stacked on TCP/UDP using OpenTrasPort/Socket.
I want to broadcast to 255.255.255.255, but it is sent to subnet address
(ex. 172.16.127.255) automatically in MacOSX.

Is it possible "real" broadcast (255.255.255.255) in MacOSX?

No it is not possible. It is a feature of most BSD derived protocol stack to transform 255.255.255.255 to the subnet directed broadcast address (ex. 172.16.127.255).

If you'd like to reach all the hosts on a given link, I suggest that you use the all host multicast address: 224.0.0.1

Vincent
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 >broadcast to 255.255.255.255 (From: Satoshi Hirata <email@hidden>)

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