broadcast?

[Dar Scott]

On Saturday, June 7, 2003, at 04:30 PM, RCS wrote:

> Has anyone been able to do a broadcast message using TCP sockets or 
> UDP? How
> did you do it?

No broadcast for TCP.  Use UDP.

Use 255.255.255.255 as your ip destination address in open.

Or, better yet, use the subnet broadcast address.  For example if your 
subnet is 10.50.0.0 with mask 255.255.0.0 then use 10.50.255.255 as 
your broadcast address.

I have seen my OS X translate 255.255.255.255 to a subnet broadcast on 
my primary adaptor.  My XP (or was it W2K?) did not.  Perhaps there 
will be a difference in behavior only if there is more than one subnet 
on the LAN.  I'm not sure what happens when you have more than one 
adaptor and you use 255.255.255.255 as the address.

Accept as usual (remember to close UDP these days).  Send as usual.  I 
don't know if the new ability to reply to UDP will work with 
broadcast--that would be cool.

Dar Scott
Mostly-Lurking Revolution User