broadcasting with sockets
broadcasting with sockets
- Subject: broadcasting with sockets
- From: Robert Palmer Jr <email@hidden>
- Date: Fri, 8 Aug 2003 08:33:16 -0400
Sorry if this is a repeat, I am reposting because I was having some
mail problems. I never got my own post, and didn't see any responses.
This isn't really cocoa specific, so if there is a better list for
posting this, let me know.
I'm working on my cocoa application, which does some network
communication. 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
email@hidden
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