How to send an all ones broadcast
How to send an all ones broadcast
- Subject: How to send an all ones broadcast
- From: Robert G Palmer Jr <email@hidden>
- Date: Fri, 8 Aug 2003 16:26:08 -0400
Pardon my post if this is not the appropriate list - I looked at
darwin-userlevel and it seemed too general. If this isn't the
appropriate place, please let me know.
I'm working on my cocoa application, which does some network
communication. I am using sockets with the sin_addr portion of the
sockaddr_in set to INADDR_BROADCAST. I have run into a problem and need
some help. I need to send a general network broadcast (IP =
255.255.255.255), but under BSD implementations of sockets, if I
specify the general broadcast address, the sockets layer automatically
masks it to the interface's subnet, thus creating a subnet broadcast
(e.g. if the subnet mask is 255.255.255.0 and my IP is 192.168.20.73,
then the broadcast would be 192.168.20.255). I MUST have a full
general broadcast. Steven's book says that BSD v3.0 includes a new
flag IP_ONESBROADCAST (pg 471) that will do this, but I can't find any
reference to this in the OS X headers or documentation (or man pages).
Does anyone know how to get OS X to send a general broadcast instead of
a subnet broadcast?
Robert Palmer, Jr
-----------------------------
Robert G. Palmer, Jr.
Lead Engineer, 360 Video Surveillance
Internet Pictures Corp.
email@hidden
(865) 220-6574
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